JP3332689B2 - Solar modules and portable power supplies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable power supply having a built-in storage battery, which is used when a commercial power supply cannot be used due to a natural disaster such as an earthquake or when camping is performed outdoors. Further, the present invention relates to a solar cell module used for charging a storage battery of such a portable power supply.

[0002]

2. Description of the Related Art As shown in FIG. 11, a conventional portable power supply 300 includes a lead-acid battery (nominal voltage 12 V) 30.
8 as a means for charging the storage battery 308, so that both the solar cell module 201 and the commercial power supply 203 can be used. That is, the portable power supply 300 includes a main body casing 301 having an input jack 302 for connecting an output terminal of the solar cell module 201, a solar cell input line 313 connected to the input jack 302, and an AC adapter (commercial power supply). AC-DC converter which converts and outputs AC / DC
Jack 304 for connecting the output terminal of the power supply and the commercial power input line 3 connected to the input jack 304
14 is provided. When charging is performed by the solar cell module 201, the output of the solar cell module 201 is an input jack 302, a backflow prevention diode 303 provided in a solar cell input line 313, and an overcharge prevention circuit 30.
7 to the storage battery 308. When charging is performed by the commercial power supply 203, the output of the commercial power supply 203 is AC / DC converted by the AC adapter 204, the input jack 304, the backflow prevention diode 305 provided on the commercial power supply input line 314, and the overcurrent for limiting the overcurrent. The storage battery 30 via the limiting circuit 306 and the overcharge prevention circuit 307
8 is supplied. Here, the overcharge prevention circuit 307 detects the terminal voltage V _T of the charging after the start battery 308, the terminal voltage V _T is prohibited charge reaches a predetermined upper limit value V _H, once the terminal voltage V _T again permit charging when after reaching the upper limit value V _H is the terminal voltage V _T falls below a predetermined lower limit value V _L. On the other hand, when discharging, the DC output of the storage battery 308 passes through an overdischarge prevention circuit 309 for limiting overcurrent, and is then supplied directly to the load 206 through an output jack 312, or an output circuit further including an inverter. The power is converted into an AC output (100 V) by the power supply 310 and supplied to the load 205 through the outlet 311.

As shown in FIG. 10, a conventional solar cell module (having a maximum output of about 5 W or more) 201 used to charge a storage battery 308 of the portable power supply 300 has a cost and mass productivity perspective. Therefore, it is configured in a plate shape (called a superstrate type or a substrate type). FIG. 2A shows such a solar cell module 201 viewed from a direction perpendicular to the light receiving surface (cell) 202, and FIG. 2B shows the solar cell module 201 viewed from the side. ing.

[0004]

However, in the conventional portable power supply 300, since the main body casing 301 is separate from the solar cell module 201, it is necessary to charge the solar cell module 201 at a destination. Both have to be transported, which is inconvenient to carry and has poor storage properties.

[0005] Here, even if the main body casing 301 of the portable power supply 300 and the solar cell module 201 are simply assembled together, the solar cell module 201 is formed in a flat plate shape. Difficult to assemble. In addition, many mounting members are required, which increases the cost.

Accordingly, an object of the present invention is to form a part of a main body casing with a solar cell module,
An object of the present invention is to provide a portable power supply that is easy to store and easy to carry. Another object of the present invention is to provide a solar cell module suitable for configuring such a portable power supply.

In general, when the battery is charged outdoors with a solar battery, the ambient temperature of the battery rises due to sunlight, so that the life of the battery is prevented from being shortened and the reliability is not reduced. , Indoor commercial power supply 20
It is necessary to lower the charging voltage as compared with the case of charging by No. 3. However, the conventional portable power supply 300
In the example, the charge voltage allowable range (the range determined by the upper limit value _VH and the lower limit value _VL ) is set to be the same between the charging mode using the solar cell module 201 and the charging mode using the commercial power supply 203. When charging is performed by the module 201, the life and reliability of the storage battery 308 may be impaired.

Therefore, another object of the present invention is to provide a portable power supply capable of automatically detecting whether the charging mode is a charging mode using a solar cell or a charging mode using a commercial power supply, and setting an optimum charging voltage allowable range. Is to do.

[0009]

In order to achieve the above object, a solar cell module according to claim 1 has a main body casing.
A solar cell module that incorporates a storage battery in a shing, charges the storage battery with one of a solar battery and a commercial power supply, and constitutes a part of a portable power supply that supplies an output of the storage battery to an external load. The main body casing
A front panel portion having a flat front surface and integrally formed of a transparent synthetic resin to constitute a front panel portion, and a frame-shaped side portion extending rearwardly connected to a periphery of the front panel portion; The solar cell is sealed along the front surface of the front panel portion, and protrudes from the back surface of the front panel portion on the back side of the front panel portion,
A mounting auxiliary part for mounting the components of the portable power supply is integrally housed in the main body casing.
Characterized in that it is formed in.

According to the solar cell module of the first aspect, a component such as a storage battery or an electric circuit board for charging or discharging the storage battery is mounted on the mounting auxiliary portion formed on the back surface of the front panel portion. These constitute the main part of the portable power supply. As a result, the portable power supply can be easily assembled. Here, since the mounting auxiliary portion is formed integrally with the rear side of the front panel portion so as to protrude from the rear surface of the front panel portion, the component is mounted only by engaging with the mounting auxiliary portion. Therefore, the number of additional mounting members is small, and the portable power supply can be assembled at low cost. Also assembled
The portable power supply has a housing such as a storage battery
The component is housed. Therefore, storability
Good and easy to carry. Also, the front panel is
Since it is formed of a transparent synthetic resin, light incidence on the solar cell is not hindered.

[0011] The solar cell module according to claim 2 is
The solar cell module according to claim 1, wherein an electric circuit board for charging or discharging the storage battery is integrally sealed on the back side of the front panel portion.

In the solar cell module according to the second aspect,
Since the electric circuit board is integrally sealed on the back side of the front panel portion, a mounting member for locking the electric circuit board can be omitted. Therefore, the assembly of the portable power supply is further simplified. In addition, since the intrusion of water or moisture from the outside into the electric circuit board is prevented by the sealing, the waterproofness and moistureproofness of the electric circuit board are enhanced.

According to a third aspect of the present invention, there is provided a portable power supply having a built-in storage battery, charging the storage battery with one of a solar battery and a commercial power supply, and supplying an output of the storage battery to an external load. The solar cell module according to claim 2 is provided, and the storage battery is attached to the attachment auxiliary portion of the solar cell module.

In the portable power supply according to the third aspect, the solar cell module forms a part of the main body casing, and the main components of the portable power supply are housed in the housing-shaped solar cell module. Therefore, this portable power supply has good storage properties and is easy to carry.

According to a fourth aspect of the present invention, in the portable power source according to the third aspect, an opaque coating layer is provided on a back surface of the front panel portion and a back surface of the side portion of the solar cell module. It is characterized by being.

In the portable power supply according to the fourth aspect, the opaque coating layer allows the inside of the main body to be seen through the portion of the front panel portion of the solar cell module where the solar cells are not arranged and the side portion. Is prevented. Further, sunlight is prevented from penetrating into the main body through the portion of the front panel portion where the solar cells are not arranged and the side portion. Therefore, temperature rise inside the main body due to sunlight is suppressed.

According to a fifth aspect of the present invention, in the portable power source according to the fourth aspect, the coating layer reflects light.

In the portable power supply according to the fifth aspect, since the coating layer reflects light, the rise in temperature inside the main body due to sunlight is further suppressed.

A portable power supply according to a sixth aspect is a portable power supply having a built-in storage battery, charging the storage battery with one of a solar battery and a commercial power supply, and supplying the output of the storage battery to an external load. A solar cell input unit to which the power of the solar cell is input; a commercial power input unit to which the power of the commercial power is input via an AC adapter that performs AC / DC conversion; and a power supply of the commercial power to the commercial power input unit. Is detected, whether or not the power of the commercial power supply is input to the commercial power input unit,
An input detection unit that outputs a detection signal indicating a charging mode using a commercial power supply when the power of the commercial power supply is input while indicating a charging mode using a solar cell when the power of the commercial power supply is not input; Receiving the detection signal output by the detection unit, while selecting the solar cell input unit when the detection signal represents the charging mode by the solar cell,
An input switching section for selecting the commercial power input unit when the detection signal is representative of the charging mode by the commercial power source, the solar cell
Charging mode and commercial charging mode
The charging voltage allowable range for the storage battery is switched and set so as to suppress the temperature of the storage battery to a predetermined temperature or less, and the input switching unit is selected from the solar battery input unit and the commercial power input unit. And a charge control unit that controls the supply of the power input to the input unit to the storage battery so that the terminal voltage of the storage battery falls within a charging voltage allowable range.

In the portable power supply according to the sixth aspect, the input detection section detects whether or not the power of the commercial power supply is input to the commercial power supply input section, thereby determining whether the power supply mode is the solar battery charging mode. Whether the mode is the charging mode using the power supply is automatically detected. The input switching unit selects the solar cell input unit when in the charging mode using solar cells, and selects the commercial power input unit when in the charging mode using commercial power. Then, the charge control section, the sun
Battery charging mode and commercial power charging mode
Keep the temperature of the storage battery below a specified temperature.
Switch the allowable voltage range for the storage battery
Set. Further, when the charging mode is the solar battery charging mode, the power input to the solar battery input unit is supplied to the storage battery so that the terminal voltage of the storage battery falls within the allowable charging voltage range, and the charging mode is the commercial power supply. At this time, control is performed to supply the electric power input to the commercial power input unit to the storage battery such that the terminal voltage of the storage battery falls within the allowable charging voltage range. Thereby, charging is smoothly performed according to the charging mode. At the same time,
Charging mode and commercial charging mode
The temperature of the storage battery is kept below a predetermined temperature. did
As a result, the ambient temperature of the storage battery increased due to sunlight
Even if the battery life is shortened or the reliability is reduced
Is prevented.

A portable power supply according to a seventh aspect of the present invention is the portable power supply according to the sixth aspect, wherein the charging control unit sets the first charging voltage allowable range for a solar battery charging mode as the charging voltage allowable range. Is set lower than the second charging voltage allowable range for the charging mode using the commercial power supply, and the detection signal indicates the charging mode using the solar cell in response to the detection signal output by the input detection unit. When the first charging voltage allowable range is selected, the second charging voltage allowable range is selected when the detection signal indicates a charging mode using a commercial power supply.

In the portable power supply according to the present invention, the charging control section may set the first charging voltage allowable range for the solar battery charging mode as the second charging voltage for the commercial power charging mode as the charging voltage allowable range. Than the voltage tolerance
It is set low and the first charging voltage allowable range is selected in the charging mode using solar cells, and the second charging voltage allowable range is selected in the charging mode using commercial power. The charging control unit supplies the power input to the solar cell input unit to the storage battery such that the terminal voltage of the storage battery falls within the first charging voltage allowable range when the charging mode is the solar battery charging mode. When the charging mode is the commercial power supply mode, control is performed to supply the power input to the commercial power input unit to the storage battery such that the terminal voltage of the storage battery falls within the second allowable range of the charging voltage . Therefore , even if the ambient temperature of the storage battery rises due to sunlight, the life of the storage battery is prevented from being shortened and the reliability is prevented from being reduced.

The portable power supply according to the present invention is a portable power supply having a built-in storage battery, charging the storage battery with one of a solar battery and a commercial power supply, and supplying the output of the storage battery to an external load. A solar cell input unit to which the power of the solar cell is input, a commercial power input unit to which the power of the commercial power is input via an AC adapter that performs AC / DC conversion, and a solar cell that selects the solar cell input unit. A switch for allowing the user to switch between a charging mode and a commercial power charging mode for selecting the commercial power input section, a solar battery charging mode and a commercial power charging mode;
The temperature of the storage battery below the specified temperature.
The first for the charging mode by solar cell to suppress
The charging voltage allowable range is set lower than the second charging voltage allowable range in the charging mode using the commercial power supply, and when the charging mode using the solar cell is instructed by the switch, the electric power input to the solar cell input unit is set to the above-described value. While the terminal voltage of the storage battery is supplied to the storage battery so as to fall within a first allowable range of the charging voltage, when the charge mode by the commercial power is instructed by the switch, the electric power input to the commercial power input unit is supplied to the storage battery. And a charge control unit that controls supply to the storage battery so that the terminal voltage falls within the second charge voltage allowable range.

In the portable power supply according to the present invention, a user operates a switch to select a solar cell input section for charging and to select a solar cell charging mode, and to select the commercial power supply input section. One of the charging modes using a commercial power supply for charging the battery is instructed. The charging control unit operates in charging mode using solar cells and charging using commercial power.
In the power mode, the temperature of the storage battery
When the first charging voltage allowable range for the charging mode using the solar cell is set lower than the second charging voltage allowable range for the charging mode using the commercial power so that the charging mode using the solar cell is instructed, the charging mode using the solar cell is instructed. The first charge voltage allowable range is selected, and the second charge voltage allowable range is selected when the charge mode using the commercial power supply is instructed. Then, the charge control unit supplies the power input to the solar cell input unit to the storage battery such that the terminal voltage of the storage battery falls within the first charge voltage allowable range when the charge mode by the solar cell is instructed. On the other hand, when the charging mode using the commercial power supply is instructed, control is performed to supply the electric power input to the commercial power supply input unit to the storage battery so that the terminal voltage of the storage battery falls within the second charging voltage allowable range. . Therefore , even if the ambient temperature of the storage battery rises due to sunlight, the life of the storage battery is prevented from being shortened and the reliability is prevented from being reduced.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the solar cell module and the portable power supply according to the present invention will be described below in detail.

1 to 4 show the appearance of a portable power supply 90 having a solar cell module 1 embodying the present invention. 1 is a front view of the portable power supply 90 (a direction perpendicular to the front panel 1a of the solar cell module 1), FIG. 2 is a view of the back side of the portable power supply 90, and FIG. 4 shows the portable power supply 90 viewed from the direction D in FIG. 1, respectively. Also,
FIG. 5 shows a cross section taken along line AA in FIG. 1, and FIG. 6 shows a cross section taken along line BB in FIG. The portable power supply 90 has a built-in storage battery 7 and charges the storage battery 7 with one of a solar battery and a commercial power supply.
Is supplied to an external load.

As shown in FIGS. 1 to 4, a main body casing 91 of the portable power supply 90 is composed of a housing-shaped solar cell module 1 and a flat back cover 10, and has a flat, substantially rectangular parallelepiped shape as a whole. are doing.

As can be clearly understood from FIGS. 1, 3 and 4, the solar cell module 1 has a front panel 1 having a flat front surface and integrally formed of a synthetic resin 3.
a, and a frame-shaped side surface portion 1b which is connected to the periphery of the panel portion 1a and extends rearward. The synthetic resin 3 is made of a colorless and transparent thermosetting resin that is liquid at room temperature and solidifies at a relatively low temperature of several tens of degrees Celsius, for example, an unsaturated polyester. As shown in FIGS. 5 and 6, the solar cell 2 is sealed in the front panel 1a along the front surface of the front panel 1a, and the back side of the front panel 1a (solar cell 2). Further, an electric circuit board 6 for charging or discharging the storage battery 7 is integrally sealed. Since the electric circuit board 6 is integrally sealed on the back side of the front panel portion 1a, a mounting member for locking the electric circuit board 6 can be omitted. Therefore, the portable power supply 90
Is easy to assemble. In addition, since water or moisture can be prevented from entering the electric circuit board 6 from the outside by sealing, the waterproof property and the moisture-proof property of the electric circuit board 6 can be improved. The front panel 1a is made of a transparent synthetic resin 3.
Therefore, light incidence on the solar cell 2 is not hindered.

Further, bosses 4 and ribs 5 projecting from the back surface of the front panel 1a are provided on the rear side of the front panel 1a as a mounting auxiliary portion for mounting the storage battery 7 at a position aligned with the electric circuit board 6 on the back side. It is formed integrally. Rib 5
Is a frame shape according to the external dimensions of the storage battery 7 so that the storage battery 7 can be fitted. The boss 4 is a thick cylindrical member disposed on both sides of the rib 5, and protrudes from the back surface of the front panel portion 1 a by the thickness of the storage battery 7. When the storage battery 7 is attached to the solar cell module 1, the storage battery 7 is fitted to the rib 5 from the rear, and the locking plate 8 abuts on the rear surface of the storage battery 7, and the locking plate 8 is fixed to the boss 4 with screws 9. I do. The storage battery 7 is locked in the surface direction by the rib 5 and locked in the front-rear direction by the locking plate 8 with respect to the front panel portion 1a. In this way, the storage battery 7 can be easily attached.

Back surface and side surface 1b of front panel 1a
Opaque and heat-insulating coating layer 1
3 is applied. This coating layer 13 is made of, for example, an aluminum vapor deposition layer. This coating layer 1
3, the solar cells 2 in the front panel 1a
The inside of the main body 91 can be prevented from being seen through the peripheral portion 1e and the side surface portion 1b where is not arranged. Further, when the portable power supply 90 is placed outdoors to receive sunlight, it is possible to prevent sunlight from penetrating inside the main body 91 through the peripheral portion 1e and the side surface 1b of the front panel portion 1a. Therefore, the temperature rise inside the main body 91 due to sunlight can be suppressed. In addition, since the coating layer 13 reflects light, the main body 91 is made of sunlight.
The internal temperature rise can be further suppressed.

As can be clearly understood from FIGS. 2 and 5, an annular handle 14 projecting from the back of the front panel 1a and penetrating the back cover 10 is integrally formed at the upper center of the back of the front panel 1a. Is provided. The end surface 14a of the handle portion 14 is in the same plane as the rear surface 10a of the back cover 10.
The user can easily carry the portable power supply 90 by putting his / her hand in the handle portion 14. It is preferable that four fingers other than the thumb be put in the handle portion 14 and that the thumb be turned from the side surface portion 1b to the front panel portion 1a.

As shown in FIG. 2, a fitting hole 20 having a shape corresponding to the above-mentioned handle portion 14 and penetrating through the handle portion 14 is provided in the upper center of the back cover 10. A plurality of oblong vents 11 are provided around the fitting hole 20 of the back cover 10 and a lower portion of the back cover 10, respectively. When charging,
Air is circulated inside and outside the main body casing 91 through the ventilation port 11 to dissipate heat, and a rise in temperature inside the main body 91 can be suppressed.

On both sides of the upper part of the back cover 10, rectangular openings 17, 17 for attaching the stand 12 to the main body casing 91 are provided. 2, 3 and 6, the stand 12 is formed by bending a bar. That is, the stand 12 includes a grounding portion 12a in contact with the installation surface 99 (see FIG. 6) of the portable power supply 90, and a pair of upright portions 12b connected to both ends of the grounding portion 12a and extending perpendicular to the grounding portion 12a.
And a pair of rotation locking portions 12c extending to the grounding portion 12a and the rising portion 12a perpendicularly to the grounding portion 12a, and a pair of rotation locking portions 12c connected to the ends of the rotation locking portions 12c. It comprises a pair of rotating shaft portions 12d extending outward in parallel. As shown in FIG.
Are fitted in holes 15 of a bearing portion 19 integrally formed on the back side of the front panel portion 1a. As a result, the stand 12
Can freely rotate around the rotating shaft portion 12d. As shown by the broken line in FIG.
At a position where the installation surface 99 is laid parallel to 0, an installation state in which the installation surface 99 and the front panel 1a are parallel can be realized. On the other hand, as shown by a solid line in FIG.
In a position raised vertically with respect to, the installation state in which the installation surface and the front panel portion 1a are inclined can be realized.

When the stand 12 is attached to the main body casing 91, the rotating shaft portions 12d, 12d are bent slightly inward by applying force to the upright portions 12b, 12b, and the rotating shaft portions 12d, 12d are passed through the openings 17, 17 of the back cover 10 to form the main body 91. Put inside.
Thereafter, the upright portions 12b, 12b are returned straight to the original position, and the rotating shaft portions 12d, 12d are inserted into the holes 1 of the bearing portions 19, 19.
5 and 15 are fitted. Thereby, the stand 12 can be easily attached.

The length of the upright portion 12b of the stand 12 is such that the angle between the installation surface 99 and the front surface of the front panel portion 1a is 30 ° at a position where the upright portion 12b is vertically raised with respect to the back cover 10. It is set to be. The reason for this is
Considering the solar radiation data for one year in Japan (for example, Tokyo), the tilt angle is 0 ° and the southward tilt angle is 30 °.
This is because the optimum amount of solar radiation can be substantially obtained by the above, and it is considered that two-stage switching between horizontal installation and 30 ° inclination installation is practically sufficient.

As shown in FIG. 2, bearings 19 are provided at the edges of the stand mounting openings 17, 17 of the back cover 10.
Adjacent to a portion corresponding to the hole 15 of the
8, 18 are provided. The projections 18 give a clicking feeling when the upright portion 12b is laid parallel to the back cover 10, and also lock the rotation locking portion 12c so that the stand 12 does not rattle at the laid position. .

As shown in FIG. 4, the solar cell module 1
An opening / closing portion 16 that can be opened / closed in a hinge manner is provided on the side surface portion 1b. In the opening / closing section 16, an input jack 24 for connecting an output terminal of an AC adapter (AC-DC converter for converting and outputting commercial power), an outlet 33 for AC100V output, and an output jack for DC12V output 34 are attached.

As described above, in the portable power supply 90, the solar cell module 1 forms a part of the main body casing 91, and the electric circuit board 6 is integrally sealed on the back side of the front panel 1a of the solar cell module 1. Have been.
Therefore, the portable power supply 90 is provided on the back side of the front panel 1a of the solar cell module 1 having a housing shape.
By assembling the other components, attaching the back cover 10 to the back side of the solar cell module 1, and attaching the stand 12 through the opening 17 of the back cover 10, assembly can be easily performed.

Further, the portable power supply 90 has the main components (except for the stand 12) housed in the solar cell module 1 in the form of a housing, so that the portable power supply 90 is easy to carry and easy to carry. In particular, since the handle portion 14 is provided on the back side of the main body casing 91, it is easier to carry.

In the above description, the electric circuit board 6 is integrally sealed on the back side of the solar cell module 1, but the present invention is not limited to this. For example, a mounting auxiliary portion for mounting the electric circuit board 6 may be integrally formed on the back side of the front panel portion 1a, and the electric circuit board 6 may be locked to the mounting auxiliary portion.

FIG. 7 shows a schematic block configuration of an electric circuit 92 of the portable power supply 90.

The electric circuit 92 of the portable power supply 90
Is an input detection circuit 25 as an input detection unit provided in the commercial power supply input line 36, an overcurrent limiting circuit 26, an input switching circuit 23 as an input switching unit provided in the solar cell input line 35, A charge control circuit 27 as a charge control unit provided on a common input line 37 where a battery input line 35 and a commercial power supply input line 36 are joined, a small sealed lead-acid battery (nominal voltage 12 V) 28, and an overdischarge prevention circuit And an output circuit 30.

The power output from the solar cell module 1 is input to a solar cell input line 35 as a solar cell input unit. The power of the commercial power supply 21 is input to the commercial power supply input line 36 as a commercial power supply input unit via the AC adapter 22 and the input jack 24 for performing AC / DC conversion.

The input detection circuit 25 detects whether or not the power of the commercial power supply 21 is input to the commercial power supply input line 36, and indicates the charging mode using the solar cell when the power of the commercial power supply 21 is not input. On the other hand, it outputs a detection signal S _M representing the charging mode by the commercial power source when the power of the commercial power source 21 is input.

The input switching circuit 23 includes the input detection circuit 2
5 receives the detection signal S _M outputted, when the detection signal S _M represents the charging mode by the solar cell, while keeping the front and back of the solar cell input lines 35 in a conductive state, the detection signal S
_{When M} represents a charging mode using commercial power, the front and rear solar cell input lines 35 are shut off. Thereby, the solar cell input line 35 or the commercial power supply input line 36 is selected according to the charging mode.

The overcurrent limiting circuit 26 limits the current flowing through the commercial power supply input line 36 so as to be equal to or less than a preset upper limit value.

The charge control circuit 27 includes a first charge voltage allowable range (V _OL , V _OH ) for a charge mode using a solar cell and a second charge voltage allowable range for a charge mode using a commercial power supply. 2 Allowable charging voltage range (V
_IL , _VIH ). And the input detection circuit 2
5 receives the detection signal S _M output from the first charging voltage allowable range (V _OL ,
V _OH ), while selecting the second charging voltage allowable range (V _IL , V _IH ) in the charging mode using the commercial power supply. Then, the charging control circuit 27, when a charging mode by the solar cell, the terminal voltage V _T is the first charging voltage tolerance of the storage battery 28 to power input to the solar cell input lines 35 (V _OL, V _OH) So that the storage battery 28
One to supply, when a charging mode according to the commercial power source, to enter the commercial power source the power input to the input line 36 is the terminal voltage V _T of the battery 28 second charging voltage tolerance (V _IL, V _IH) Is supplied to the storage battery 28. Specifically, as shown in FIG. 9 (a), in the charging mode by the solar cell, by detecting the terminal voltage V _T of the charging after the start battery 28, the terminal voltage V _T of the battery 28 reaches the upper limit V _OH prohibits charging, once the terminal voltage V _T has reached the upper limit V _OH permits again charged when the terminal voltage V _T below the lower limit V _OL. Further, as shown in FIG. 9 (b), and in the charging mode by commercial power, by detecting the terminal voltage V _T of the charging after the start battery 28, the terminal voltage V _T of the battery 28 reaches the upper limit V _IH charging prohibited, once the terminal voltage V _T has reached the upper limit value V _IH permits again charged when the terminal voltage V _T below the lower limit V _IL. Thereby, charging can be performed smoothly in accordance with the charging mode.

Here, when charging is performed outdoors by the solar cell module 1, the temperature inside the main body 91 rises due to sunlight, but the upper limit of the usable temperature of a general small sealed lead-acid battery is 50 ° C. Therefore, it is necessary to suppress the temperature of the storage battery 28 to 50 ° C. or less. Therefore, when charging by the solar cell module 1 outdoors, the storage battery 28
Is assumed to be 50 ° C. or less, for example, the first charging voltage allowable range (V _OL , V _OH ) = (13.0, 14.0.
0) (unit volt). Further, when charging is performed indoors by the commercial power supply 21, the temperature of the storage battery 28 is assumed to be maintained in a standard temperature range of 5 ° C. to 35 ° C., for example, the second allowable charging voltage range (V _IL , V _IH ). = (13.7,1
4.7) Set to (unit volt). As described above, in the portable power supply 90, the first charging voltage allowable range (V _OL , V _OH ) selected in the solar battery charging mode is changed to the second charging voltage allowable range (V) selected in the commercial power charging mode. _IL , V _IH ). Therefore, even if the ambient temperature of the storage battery 28 rises due to sunlight, it is possible to prevent the life of the storage battery 28 from being shortened and the reliability from being reduced.

When discharging, the storage battery 28 shown in FIG.
DC output (12 V) passes through an overdischarge prevention circuit 29 for limiting overcurrent, and is then supplied directly to a load 32 through an output jack 34, or an AC output (100 V) by an output circuit 30 further including an inverter. ) And supplied to the load 31 through the outlet 33.

FIG. 8 specifically shows a main part of the electric circuit 92 shown in FIG. 7, that is, a part that works to charge the storage battery 28.

The constant voltage circuit 40 is connected to the solar cell input line 3
5 or by power inputted to a commercial power input line 36 a circuit for creating a constant voltage (DC5V), a diode D ₃ which is connected to the solar cell input lines 35, a diode connected to a commercial power supply input line 36 and D _4, consisting of a switching regulator RG connected via a resistor R ₉ to the diodes D _3, D _4, the electrolytic capacitor C ₁ for smoothing, C ₂ Prefecture. The constant voltage circuit 40 supplies a constant voltage (5 VDC) to the overcurrent limiting circuit 26 and the charge control circuit 27 through a constant voltage supply line 38.

The input detection circuit 25 includes a current limiting resistor R ₁ connected to the commercial power supply input line 36 and a resistor R _1.
And an electromagnetic relay (relay coil) RC connected between the ground and the ground. When the output voltage of the AC adapter 22 is applied to the commercial power input line 36, the relay RC is energized and excited, and when the output voltage of the AC adapter 22 is not applied to the commercial power input line 36, the relay RC is activated. RC is not energized and is de-energized. The presence / absence of energization (excitation / non-excitation) of the relay RC depends on the detection signal S _M described above.
Is equivalent to That is, the non-excitation of the relay RC indicates a charging mode using the solar cell, while the excitation of the relay RC indicates a charging mode using the commercial power supply.

The input switching circuit 23 is a contact RC-1 which is switched depending on whether or not the relay RC of the input detection circuit 25 is energized (excited, non-excited) (shows a switching position (normal position) in the case of non-excited in the figure). And the backflow prevention diode D ₁
Consists of When the relay RC is not energized, that is, in a charging mode using the solar cell, the solar cell input lines 35 before and after the input switching circuit 23 are in a conductive state. On the other hand, when the relay RC is excited, that is, in the charging mode using the commercial power supply, the solar cell input lines 35 before and after the input switching circuit 23 are cut off. Thereby, the solar cell input line 35 or the commercial power supply input line 36 is selected according to the charging mode.

The overcurrent limiting circuit 26 includes a resistor R ₂ and blocking diode D ₂ is provided to a commercial power supply input line 36, a comparator CMP _1, a resistor R ₃ to R _8, a variable (semi-fixed) resistance VR _{Consists of one} . Since the current flowing in the commercial power supply input line 36 is proportional to the voltage drop across the resistor R _2, the comparator CMP ₁ includes a resistance R ₃ resistor R
And the potential at the connection point between ₄ and a reference potential at the connection point between the resistor R ₆ and the resistor R ₇ to compare. When the former is lower than the latter, the output terminal 51 outputs H as a signal to permit charging.
While the (high) level is output, if the former is higher than the latter, the output terminal 51 outputs L (low) as a signal to prohibit charging.
Output level. Incidentally, by adjusting the variable resistor VR _1, it is possible to vary the criterion for determining whether an over-current.

The charge control circuit 27 includes a first charge voltage allowable range (V _OL , V _OH ) and a second charge voltage allowable range (V _IL ,
Sets the V _{the IH),} and battery terminal voltage detecting circuit 41 for comparing the magnitude of the terminal voltage V _T of these charge voltage tolerance and storage battery 28, based on the comparison result of the storage battery terminal voltage detecting circuit 41 And a charging current control circuit section 42 for controlling on / off of the charging current for the storage battery 28.

The storage battery terminal voltage detection circuit 41 includes a relay R
A contact RC-2 (a switching position (normal position) in the case of non-excitation in the figure, which is switched according to the energization or non-excitation (excitation or non-excitation) of C) and variable (semi-fixed) resistors VR _{2 to} VR _4.
When, a resistor R ₁₀ to R _15, a comparator CMP _2, a diode D ₆ Prefecture. The common terminal of relay contact RC-2 is connected to the + terminal (anode) of storage battery 28. In general, the variable (semi-fixed) resistor VR ₂ and the resistor R ₁₃ are for setting the upper limit value V _OH of the first charging voltage allowable range, and the variable (semi-fixed) resistor VR ₃ and the resistor R ₁₄ are the second resistor R ₁₄ . This is for setting the upper limit value V _IH of the charging voltage allowable range. The resistors R ₁₀ and R ₁₁ are connected to the + of the comparator CMP ₂ .
This is for setting a reference potential to the input terminal. As will be described later, the resistor R ₁₂ , the variable resistor R _4, and the diode D ₆ set the lower limit value V _OL of the first charging voltage allowable range and the lower limit value V _IL of the second charging voltage allowable range to the upper limit of each charging voltage allowable range. Works to make it lower than the value.

The charging current control circuit 42 includes a power MOS transistor TR ₁ provided on the common input line 37,
ON the power MOS transistor TR _1, a gate circuit 43 for switching off, and a NPN transistor TR _2. Diode D ₇ between the output terminal 51 of the NPN transistor base terminal and the comparator CMP ₁ of TR ₂ is the NPN transistor TR ₂
And the output terminal 5 of the comparator CMP ₂
2 are connected to the respective diodes D ₈ .
Is this NPN transistor between the base terminal and the constant voltage supply line 38 of the TR ₂ resistor R ₁₇ of the base current for supply is connected, between the emitter terminal and the ground of the NPN transistor TR _2, is being charged light-emitting diode LED ₁ for representing whether is connected. The gate circuit 43 receives the potential level of the output terminal (collector terminal) 53 of the NPN transistor TR ₂ via the resistor R _18,
While turning on the power MOS transistor TR ₁ and the voltage of the constant voltage supply line 38 when the output terminal 53 is at L level (DC5V) is applied to the gate G of the power MOS transistor TR _1, the output terminal 53 is H level The gate G of the power MOS transistor TR ₁
And a source S and the same potential is adapted to turn off the power MOS transistor TR ₁ and. When the output terminal 51 and output terminal 52 of the comparator CMP ₂ of the comparator CMP ₁ are both at H level, NPN
The base terminal of the transistor TR ₂ is at the H level N
PN transistor TR ₂ is turned on. As a result, NPN
Output terminal 53 of the transistor TR ₂ is at the L level, the gate circuit 43 is a power MOS transistor TR ₁
Turn on. This allows the storage battery 28 to be charged. This and displays the light-emitting diode LED ₁ is being charged on. On the other hand, the output terminal 51 of the comparator CMP ₁ or the comparator CM
When at least one output terminal 52 of the P ₂ is at the L level, the NPN transistor TR ₂ base terminal of the NPN transistor TR ₂ becomes L level is turned off. As a result, the output terminal 53 of the NPN transistor TR ₂ is H
Level so that the gate circuit 43 turns off the power MOS transistor TR _1. As a result, charging of the storage battery 28 is prohibited. This together with the light emitting diode LED ₁ is turned off to indicate that the charging is stopped.

[0058] Now, the relay RC is de-energized the input detection circuit 25, that is, if the charging mode by the solar cell, the contact RC-2 of the battery terminal voltage detecting circuit 41 is in the normal position shown, the resistor R ₁₃ and the resistor the potential at the connection point between R ₁₅ is proportional to the terminal voltage of the storage battery 28, and the variable resistor VR ₂
And a value corresponding to the resistance R _13. Comparator CMP
_2, the potential at the connection point between the resistor R ₁₃ and the resistor R _15, the resistor R
₁₀ and is compared with the reference potential at the connection point between the resistor R _11, when charging after starting the former is lower than the latter outputs an H level to an output terminal 52 as a signal to permit charging, than the former the latter When it becomes high, an L level is output to the output terminal 52 as a signal for inhibiting charging. As a result, the operation of the charging current control circuit 42 described above causes the storage battery 2 after the start of charging.
8 terminal voltage V _T of allow charging to reach the upper limit V _OH, can be prohibited and reaches the upper limit V _OH charging. Once the diode D ₆ after the comparator CMP ₂ is an L level output to the output terminal 52 becomes forward biased, resistor R _12, a current flows through the variable resistor R ₄ and diode D _6, as a result, the comparator CMP ₂ The reference potential of the + input terminal drops. Then, when the potential of the connection point between the resistor R ₁₃ and the resistor R ₁₅ is lower than the reference potential reduced at the connection point between the resistor R ₁₀ and the resistor R _11, the comparator C
MP ₂ is output from the output terminal 52 as a signal to permit charging again.
Output an H (high) level. Thus, the operation of the charging current control circuit 42 described above, be tolerated charged again when once the the terminal voltage V _T After the terminal voltage V _T has reached the upper limit V _OH value below the lower limit V _OL it can.

On the other hand, when the relay RC of the input detection circuit 25 is energized, that is, in the charging mode using the commercial power supply, the contact RC-2 of the storage battery terminal voltage detection circuit 41 is switched to the operating position (the side opposite to the normal position shown). And the resistance R ₁₄
The potential of the connection point between the resistor R ₁₅ is proportional to the terminal voltage of the storage battery 28, and a value corresponding to the variable resistor VR ₃ and resistor R _14. The comparator CMP ₂ includes a resistor R ₁₄ and a resistor R ₁₅
And the potential at the connection point between the resistance is compared with the reference potential at the connection point between R ₁₀ and the resistor R _11, H to the output terminal 52 when the charging starts after the former is lower than the latter as a signal to permit charging When the former becomes higher than the latter, an L level is output to the output terminal 52 as a signal for prohibiting charging. Thus, the operation of the charging current control circuit 42 described above, that the terminal voltage V _T of the charging after the start battery 28 is permitted to charge until it reaches the upper limit value V _IH, prohibiting charging when it reaches the upper limit value V _IH it can. Once the comparator CMP
₂ after outputting the L level to the output terminal 52 becomes diode D ₆ is forward biased, resistor R _12, a current flows through the variable resistor R ₄ and diode D _6, as a result, the comparator CMP ₂ + input terminal Of the reference voltage decreases.
Then, the potential of the connection point between the resistor R ₁₄ and the resistor R ₁₅ is, when lower than the reference potential reduced at the connection point between the resistor R ₁₀ and the resistor R _11, the comparator CMP ₂ is a signal that allows the charge again An H (high) level is output to the output terminal 52.
Thus, the operation of the charging current control circuit 42 described above, be tolerated charged again when once the terminal voltage V _T After the terminal voltage V _T has reached the upper limit value V _IH below the lower limit V _IL it can.

As described above, according to the electric circuit 92,
It is possible to automatically detect whether the charging mode is a charging mode using a solar cell or a charging mode using a commercial power supply, and it is possible to optimally set a charging voltage allowable range.

[0061] When the overcurrent flows to the commercial power supply input line 36 in the charging mode by the commercial power source, the comparator CMP ₁ to the output terminal 51 as a signal for prohibiting the charging L
Output level. Thereby, the power MOS transistor TR ₁ is operated by the operation of the charging current control circuit 42 described above.
Is turned off, and charging can be prohibited.

The input detection circuit 25 is omitted, and the contact R
C-1 and RC-2 may be linked switches that can be manually operated by the user. In this case, the user manually switches the interlocking switch, a solar battery charging mode to select the solar cell input unit,
A commercial power supply charging mode for selecting the commercial power supply input section can be selected. Contacts RC-1, RC-2
, The charge mode is switched between the first charging voltage allowable range (V _OL , V _OH ) for charging by the solar cell and the second charging voltage range for charging by the commercial power supply.
This involves switching to the charging voltage allowable range (V _IL , V _IH ).
Therefore, the optimum charging voltage allowable range is selected according to the charging mode.

[0063]

As is apparent from the above description, according to the solar cell module of the first aspect, the components such as the storage battery and the charging or discharging of the storage battery are performed on the mounting auxiliary portion formed on the back surface of the front panel portion. The main part of the portable power supply can be constituted by attaching an electric circuit board for the portable power supply, and as a result, the portable power supply can be easily assembled. Further, since the above-mentioned components can be attached simply by being locked to the attachment auxiliary portion, the number of additional attachment members is reduced, and the portable power supply can be assembled at low cost. Also assembled portable power supply
Contains the storage battery and other components in the main casing.
It becomes something. Therefore, it is easy to store and carry
It will be easier.

In the solar cell module according to the second aspect, since the electric circuit board is integrally sealed on the back side of the front panel portion, a mounting member for locking the electric circuit board can be omitted, and the portable power supply can be used. It can be more easily assembled. In addition, since the intrusion of water or moisture from the outside into the electric circuit board is prevented by the sealing, the waterproof property and the moisture-proof property of the electric circuit board can be improved.

In the portable power supply according to the third aspect, the solar cell module constitutes a part of the main body casing, and the main parts of the portable power supply are housed in the housing-shaped solar cell module. Therefore, this portable power supply has good storage properties and is easy to carry.

In the portable power supply according to the fourth aspect, the opaque coating layer prevents the inside of the main body from being seen through the portion of the front panel portion of the solar cell module where the solar cells are not disposed and the side portion. Can be prevented. In addition, it is possible to prevent sunlight from penetrating into the main body through the portion of the front panel portion where the solar battery cells are not disposed and the side surface portion, and to suppress a rise in temperature inside the main body due to sunlight.

In the portable power supply according to the fifth aspect, since the coating layer reflects light, the temperature rise inside the main body due to sunlight can be further suppressed.

According to a sixth aspect of the present invention, in the portable power supply, the input detection unit detects whether or not the power of the commercial power supply is input to the commercial power supply input unit to determine whether the portable power supply is in the solar battery charging mode. It is possible to automatically detect whether the charging mode is the commercial power supply mode, and to smoothly perform charging according to the charging mode. At the same time,
Charging mode and commercial charging mode
The temperature of the storage battery is kept below a predetermined temperature. did
As a result, the ambient temperature of the storage battery increased due to sunlight
Even if the battery life is shortened or the reliability is reduced
Can be prevented.

In the portable power supply according to the present invention, the charging control section may set the first charging voltage allowable range for the charging mode using the solar cell as the second charging voltage for the charging mode using the commercial power supply as the charging voltage allowable range. It is set lower than the permissible range, and the first charging voltage permissible range is selected in the charging mode using solar cells, and the second charging voltage permissible range is selected in the charging mode using commercial power . Accordingly
Thus, even if the ambient temperature of the storage battery rises due to sunlight, it is possible to prevent the life of the storage battery from being shortened and the reliability from being reduced.

In the portable power supply according to the present invention, a user operates a switch to select a solar cell input section and charge the battery.
Either the commercial power supply charging mode in which the commercial power supply input section is selected to perform charging is instructed. The charge control unit has a charge mode using solar cells and a charge mode using commercial power.
The temperature of the storage battery below the specified temperature.
The first for the charging mode by solar cell to suppress
The charging voltage allowable range is set lower than the second charging voltage allowable range for the charging mode using the commercial power supply, and the first charging voltage allowable range is selected when the charging mode using the solar cell is instructed. When the charge mode is instructed, the second allowable range of the charging voltage is selected . Therefore , even if the ambient temperature of the storage battery rises due to sunlight, it is possible to prevent the life of the storage battery from being shortened and the reliability from being reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a front panel portion of a portable power supply embodying the present invention as viewed from the front.

FIG. 2 is a diagram showing the back side of the portable power supply.

FIG. 3 is a diagram showing the portable power supply as viewed from a direction C in FIG. 1;

FIG. 4 is a diagram showing the portable power supply as viewed from a direction D in FIG. 1;

FIG. 5 is a sectional view taken along line AA in FIG. 1;

FIG. 6 is a sectional view taken along line BB in FIG. 1;

FIG. 7 is a block diagram showing an electric circuit of the portable power supply.

8 is a diagram showing a main part of the electric circuit of FIG. 7;

FIG. 9 is a diagram illustrating a charging operation of the portable power supply.

FIG. 10 is a view showing the appearance of a conventional solar cell module.

FIG. 11 is a block diagram showing an electric circuit of a conventional portable power supply.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Solar cell module 1a Front panel part 1b Side part 2 Solar cell 4 Boss 5 Rib 6 Electric circuit board 10 Back cover 12 Stand 91 Body casing 90 Portable power supply

Continuation of the front page (56) References JP-A-7-184331 (JP, A) JP-A-7-27391 (JP, A) JP-A-6-351266 (JP, A) JP-A-3-190538 (JP) , A) Japanese Utility Model Showa 60-166237 (JP, U) Japanese Utility Model Showa 60-186831 (JP, U) Japanese Utility Model Application Hei 5-88159 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB) Name) H02N 6/00 H02J 7/35

Claims (8)

(57) [Claims] A storage battery is built in a main body casing, and the storage battery is charged by one of a solar battery and a commercial power supply, and a solar battery constituting a part of a portable power supply for supplying an output of the storage battery to an external load. A battery module, comprising: a front panel portion having a flat front surface and integrally formed of a transparent synthetic resin to constitute the main body casing ; and a frame-shaped side surface extending to the periphery of the front panel portion and extending rearward. A solar cell is sealed along the front surface of the front panel portion in the front panel portion, and protrudes from the back surface of the front panel portion to the back side of the front panel portion; Attaching auxiliary parts for attaching the components of the portable power supply are integrally housed in the main body casing.
Solar cell module, characterized by being formed so as to be. 2. The solar cell module according to claim 1, wherein an electric circuit board for charging or discharging the storage battery is integrally sealed on the back side of the front panel portion. Solar cell module. 3. A portable power supply having a built-in storage battery, charging the storage battery with one of a solar battery and a commercial power supply, and supplying an output of the storage battery to an external load. A portable power supply comprising a solar cell module, wherein the storage battery is mounted on the mounting auxiliary portion of the solar cell module. 4. The portable power supply according to claim 3, wherein an opaque coating layer is provided on a back surface of the front panel portion and a back surface of the side portion of the solar cell module. . 5. The portable power supply according to claim 4, wherein the coating layer reflects light. 6. A portable power supply having a built-in storage battery, charging the storage battery with one of a solar battery and a commercial power supply, and supplying an output of the storage battery to an external load, wherein power of the solar battery is input. A solar battery input unit, a commercial power input unit to which power from a commercial power source is input via an AC adapter that performs AC / DC conversion, and a determination as to whether the power of the commercial power source is input to the commercial power input unit. An input detection unit that detects and outputs a detection signal indicating the charging mode using the commercial power supply when the power of the commercial power supply is input while indicating the charging mode using the solar cell when the power of the commercial power supply is not input. Receiving the detection signal output by the input detection unit, and selecting the solar cell input unit when the detection signal indicates a charging mode using the solar cell, while the detection signal is commercial An input switching section for selecting the commercial power input unit to represent the charging mode by source, charging mode by the charging mode and the commercial power supply by the solar cell
To keep the temperature of the storage battery below a predetermined temperature, respectively.
Switch the charge voltage tolerance for the storage battery so that
The power input to the input unit selected by the input switching unit out of the solar cell input unit and the commercial power input unit is supplied to the storage battery such that the terminal voltage of the storage battery falls within a charging voltage allowable range. A portable power supply, comprising: 7. The portable power supply according to claim 6, the charge control unit, as the charging voltage tolerance, according to a first charging voltage tolerance <br/> commercial power supply for charging mode by the solar cell The first charging voltage allowable range is set lower than the second charging voltage allowable range for the charging mode, and the first charging voltage allowable range is set when the detection signal indicates the solar battery charging mode in response to the detection signal output by the input detection unit. While choosing
A portable power supply, wherein the second charging voltage allowable range is selected when the detection signal indicates a charging mode using a commercial power supply. 8. A portable power supply having a built-in storage battery, charging the storage battery with one of a solar battery and a commercial power supply, and supplying an output of the storage battery to an external load, wherein power of the solar battery is input. A solar cell input unit, a commercial power input unit to which commercial power is input via an AC adapter for performing AC / DC conversion, a solar battery charging mode for selecting the solar cell input unit, and a commercial power input A switch for the user to switch between a commercial power supply mode for selecting a unit, a solar battery charge mode and a commercial power supply charge mode
To keep the temperature of the storage battery below a predetermined temperature, respectively.
As described above, the first charging voltage allowable range for the charging mode using the solar cell is set lower than the second charging voltage allowable range for the charging mode using the commercial power supply, and the charging mode using the solar cell is indicated by the switch. When the power input to the solar cell input unit is supplied to the storage battery such that the terminal voltage of the storage battery falls within the first charging voltage allowable range, while the charging mode using the commercial power is instructed by the switch. A portable power supply comprising: a charge control unit that controls supply of power input to the commercial power input unit to the storage battery such that a terminal voltage of the storage battery falls within a second allowable range of charging voltage. .