KR20030053988A - Folder-type charging battery using solar-battery - Google Patents

Abstract

PURPOSE: A folder type charging battery using a solar battery is provided to allow a user to continuously use a terminal by charging the terminal with solar light on the spot. CONSTITUTION: A solar battery(100) concentrates solar light to generate a voltage or a current, that is power. The generated power is inputted to a booster circuit(110). The booster circuit(110) includes a charging unit(111) for charting power, a controller(112) for outputting a control signal to control charging and discharging of the charging unit(111), and a switching unit(113) for performing an ON/OFF operation according to the control signal of the controller(112). Power outputted from the booster circuit(110) is charged in a storage battery(130) after passing through a protection circuit(120). The storage battery(130) charges power or supplies power to a terminal(150) for its wireless communication. The protection circuit(120) consists of a PCM(Protection Circuit Module)(122) and a PTC(Positive Temperature Coefficient thermistor)(121). The PCM(122) monitors a voltage and a current of the storage battery(130). When the PCM senses an overcharged voltage, an overdischarged voltage and an overcurrent, it cuts off an electric circuit to protect the storage battery(130). The PTC(121) is a semiconductor device of which electric resistance is rapidly increased when a temperature goes up. A charging unit(140) for converting general power and supplying it is connected to the protection circuit(120), so that power supplied from the charging unit(140) is supplied to the storage battery(130) after passing through the protection circuit(120).

Description

Folder-type charging battery using solar-battery}

The present invention relates to a folding type rechargeable battery using a solar cell, and more particularly, to secure a sufficient light condensing area and to increase charging efficiency, when the rechargeable battery cannot be charged due to busy work or natural disasters. Even in the field, it can be recharged immediately by using solar light, so that the terminal can be used continuously. Two sets of light collecting plates are installed by the folder-type structure to secure sufficient light collecting area, and the booster circuit In this case, the charging efficiency is increased, and the charging using the charger and the charging using the solar cell are combined to a single rechargeable battery to enhance the user's convenience.

In general, since the conventional wireless communication terminal is used by combining a removable battery on one side of the terminal, the mobility is guaranteed and easy to carry and is widely used.

In the case of such a wireless communication terminal, when the battery is used for a predetermined time, sufficient power is not supplied from the battery coupled with the terminal, and the terminal cannot be used. To reuse the terminal, it is necessary to replace the battery with an extra charged battery or use a charger. After charging, the battery charger should be used. Since the charger uses commercial power, it must be charged at a certain place and for a predetermined time in order to charge the battery.

However, when going out due to long-term travel or business trip, the charger must be carried separately to charge the battery, and the battery cannot be charged due to busy work or natural disasters, and thus the terminal cannot be used. There is this.

Recently, an apparatus for charging a storage battery using a solar battery has been proposed to solve the above problems.

Here, the solar cell is a photovoltaic cell manufactured for the purpose of converting solar energy into electrical energy, and the materials of the solar cell include silicon, gallium arsenide, cadmium tellurium, cadmium sulfide, indium, or a combination thereof. The open single-circuit voltage per device is about 0.55V, the short-circuit photocurrent is 35 ~ 40mA / cm2, and the power conversion efficiency for solar 1mA / m2 is 8% on average and 15% on average.

However, since the battery charging device using the solar cell is charged using only sunlight, it is not effectively used due to the limitation of the solar cell efficiency and the light collecting area.

Accordingly, an object of the present invention is to solve the problems of the conventional battery and the solar battery using the conventional commercial power, even if the rechargeable battery due to busy work or natural disasters in the field of sunlight It can be recharged immediately by using the terminal, so that the terminal can be used continuously. The two sets of light collecting plates are installed by the folding structure to secure sufficient condensing area, and the charging efficiency is increased by the booster circuit. The present invention provides a folding type rechargeable battery using a solar cell that can be used for charging and charging a solar cell to a single rechargeable battery to enhance user convenience.

1 is a block diagram of a folding type rechargeable battery using a solar cell according to the present invention.

2 is a circuit diagram of a folding type rechargeable battery using a solar cell according to the present invention.

Figure 3a is the output waveform during charging by the conventional solar cell.

Figure 3b is the output waveform during charging of the folding type rechargeable battery using a solar cell according to the present invention.

Figure 4 is an exploded perspective view of the folding type rechargeable battery using a solar cell according to the present invention.

5 is an installation and use state of the folding type rechargeable battery using a solar cell according to the present invention.

Explanation of symbols on the main parts of the drawings

100: solar cell 110: booster circuit

111 charging unit 112 control unit

113: switching unit 120: protection circuit

121: PTC122: PCM

130: battery 140: charger

150: terminal

The foldable rechargeable battery using a solar cell according to the present invention for achieving the above object is a solar cell for condensing sunlight and converting the power into a power source, the power converted from the solar cell, the power charged every certain time A booster circuit for supplying power, a charger for supplying power using a commercial power source, a terminal for wireless communication, a battery for charging or supplying power to the booster circuit or a charger, and the booster It is characterized by consisting of a protection circuit for monitoring the power supplied to the terminal from the circuit, the charger and the battery, and cuts off the power supply when overcurrent and overheating occur.

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

1 is a block diagram of a folding type rechargeable battery using a solar cell according to the present invention.

The solar cell 100 collects sunlight to generate voltage and current, that is, power, and the generated power is input to a booster circuit 110, and the booster circuit 110 is a charging unit for charging power. (111), a control unit 112 for outputting a control signal for controlling charging and discharging of the charging unit 111 and a switching unit for performing an on-off operation by the control signal of the control unit 112 ( 113).

Here, the booster circuit 110 is a circuit for outputting amplified current for a short time after charging a constant input current for a predetermined time, the charging time and the discharge time of the current is charged with the input voltage Determined by comparing the voltage.

That is, the voltage and current input from the solar cell 100 are input to the charging unit 111 and charged, and the controller 112 compares the voltage input from the solar cell 100 with the voltage charged in the charging unit 111. The switching unit 113 outputs a control signal for the on-off operation, the switching unit 113 performs the on-off operation by the control signal input from the control unit 112, the switching unit 113 is turned on In the state of supplying the charged power to the charging unit 111, in the off state, the power input from the solar cell 100 is charged in the charging unit 111.

The power output from the booster circuit 110 is charged to the storage battery 130 through the protection circuit 120, the storage battery 130 is charged to the power as necessary, or power to the terminal 150 for wireless communication To supply.

At this time, the storage battery 130 is a lithium-based secondary battery such as lithium-ion (Li-Ion) or lithium-polymer (Li-Polymer), the protection circuit 120 is a PCM (PCM: Protection Circuit Module, PCM) 122 and PTC (PTC: Positive Temperature Coefficient Thermistor, hereinafter PTC) 121.

The PCM 122 is a circuit that protects the battery 130 by blocking an electrical circuit when the voltage and current of the battery 130 are monitored to detect the overcharge voltage and the overdischarge voltage and overcurrent.

In addition, the PTC 121 is made by mixing a small amount of tin and cesium into a barium titanate-based semiconductor, and is a semiconductor device whose electrical resistance increases rapidly when the temperature rises. Also referred to as a static thermistor, the temperature rises above a certain temperature. When the temperature is lowered, the operation is turned on again. When a high current flows within a very short time, the electrical resistance increases and the operation is performed in the off state.

In addition to the power supply by the solar cell 100, the charger 140 for converting and supplying commercial power is connected to the protection circuit 120, the power supplied from the charger 140 via the protection circuit 120 storage battery Supplied to 130.

2 is a circuit diagram of a folding type rechargeable battery using a solar cell according to the present invention.

In the booster circuit 110, the S + terminal and the S- terminal are connected to the solar cell 100. When 100klx of solar light is collected by the solar cell 100, a current of 40 mA and a voltage of 7 V can be obtained. Over current is input to S + terminal.

At this time, the voltage across R1 is input to Micom, and if the voltage difference between R1 is greater than or equal to a specific voltage, Micom turns off TR and charges C1, and the Micom is a control unit 112 and TR is a switching unit 113. , C1 serves as the charging unit 111.

Here, lx is a symbol of lux, and lux is a practical unit of illumination degree, and the illumination degree of the surface perpendicular to the light ray 1 m away from the point light source of 1 cd (candela) is 1 lx.

As C1 is charged, the voltage across C1 increases, and the difference between the voltages across R1 gradually decreases. If the voltage difference across R1 is less than the specified voltage, Micom turns on TR and discharges C1. The discharged voltage and current charges the battery 130 through the B + terminal.

At this time, the C1 selects a device having a small internal resistance to enable rapid discharge, thereby increasing the efficiency of the booster circuit 110.

In addition, the R1 is for current attenuation, and when the charging current of C1 is significantly larger than the current supplied from the solar cell 100, the voltage of the solar cell 100 is prevented from rapidly decreasing.

In addition, R2 and R3 are to reduce the current consumption of Micom of the current supplied from the solar cell 100, R2 limits the current consumption of the signal to control the on-off operation of the TR is more than necessary current consumption inside the Micom By preventing the flow to TR, R3 is to prevent the supply of more current than necessary from the solar cell (100).

In addition, R4 is used for oscillation, and adjusts the frequency of the Micom control signal along with a capacitor built in Micom, and adjusts the time interval comparing the voltage difference between R1 according to the frequency of this control signal. Determines Micom operation such as control signal output time to turn TR on and off.

C2 is to adjust Micom's power on delay time, and when power is applied, it is understood that Micom is operated by inputting an ideal signal. Since Micom operates only after the time passes, artificially delay the operation of Micom to compensate for the difference between the measured signal input time and Micom operation time.

In addition, the SD is to cut off the current input from the storage battery 130 or the charger 140 (not available charger when charging using the solar cell) when TR is off and C1 is charged, and the reverse leakage current is small. Schottky diodes are used.

The PCM 122 in the protection circuit 120 is connected to the B + terminal and the B- terminal, and the B + terminal and the B- terminal are connected to the battery 130. If the voltage of the battery 130 exceeds a predetermined voltage, the FET2 Blocking the battery 130 prevents charging, and when the voltage of the battery 130 is less than a predetermined voltage, the FET1 is blocked to block the discharge of the battery 130.

In addition, by using a FET having an internal resistance of 40 mΩ, the circuit is cut off when a current of 2.5 A or more flows, and PTC is used to prevent an internal temperature rise, thereby preventing the battery 130 from being subjected to an abnormal voltage, an abnormal current, and overheating. It protects you.

In addition, the booster circuit 110, the protection circuit 120, and the storage battery 130 maintain a constant charging voltage by impedance matching, and the method of impedance matching may be modified by those skilled in the art. There is no limit.

3A is an output waveform during charging by a conventional solar cell, and FIG. 3B is an output waveform during charging of a fold type rechargeable battery using a solar cell according to the present invention, and has a constant supply current for charging the storage battery 130. If kept at (A), the charging efficiency decreases due to the resistance of the internal circuit over time.

Therefore, after the current value A, which is kept constant, is obtained using the booster circuit 110, the amplified current value A 'is obtained, and then the pulse energy is charged into the storage battery 130, whereby the resistance of the internal circuit The charging efficiency is reduced to increase the charging efficiency.

At this time, the period T is made up of the sum of T1 and T2, T1 is the charging time of C1 and T2 is the discharge time of C1, and of course, the period T can be adjusted by selecting C1 as having the desired device characteristics.

4 is an exploded perspective view of a folding type rechargeable battery using a solar cell according to the present invention, and FIG. 5 is an installation and use state diagram of a folding type rechargeable battery using a solar cell according to the present invention. Rechargeable battery 160 coupled to the main body 161 with the built-in hinge and the upper plate 162 hinged is removable with the terminal 150, the opposite side of the body 161 is coupled to the terminal 150 The lower light collecting plate 161a for collecting solar light is installed on the surface, and a charging terminal 163 connected to the charger 140 is installed at the bottom of the lower light collecting plate 161a, and when the upper plate 162 is unfolded, In the same direction as the light collecting plate 161a, the upper light collecting plate 162a is installed on the upper plate 162, and when charging by using a commercial power source, the upper plate 162 of the charging battery 160 is folded to the charger 140. When seated and charged, the charging battery 160 when charging using sunlight Is filled by expanding the upper plate 162 condenses the solar jipgwangpan the upper (162a) and a lower jipgwangpan (161a).

The present invention may be modified in various ways without departing from the basic concept according to the needs of those skilled in the art.

As described above, according to the present invention, even when the rechargeable battery is not charged due to busy work or natural disasters, the terminal 150 can be continuously charged using sunlight in the field so that the terminal 150 can be continuously used. By installing two sets of light collecting plates according to the structure, sufficient condensing area can be secured, and the charging efficiency is increased by the booster circuit 110, and thus, the thickness of the rechargeable battery can be made thin, and the charger 140 is provided. There is an effect to promote the user's convenience by using the charge and the charge using the solar cell 100 combined with a single rechargeable battery.

Claims (5)

In the rechargeable battery coupled to the wireless communication terminal 150 and detachable and charged using the charger 140, The main body 161 is coupled to the terminal 150, and the upper plate 162 is hingedly coupled to the main body 161, A collapsible rechargeable battery using a solar cell, wherein a lower light collecting plate 161a and an upper light collecting plate 162a are installed on opposite surfaces of the main body 161 and the upper plate 162, respectively. In the charging battery for a wireless communication terminal to charge using the charger 140, Solar cell 100 for condensing sunlight and converting it into a power source, A booster circuit 110 for charging the power converted by the solar cell 100 and supplying the charged power every predetermined time; A protection circuit 120 that monitors the power supplied from the booster circuit 110 and cuts off the power supplied when overcurrent and overheating occur; Folding type rechargeable battery using a solar cell, characterized in that consisting of a storage battery 130 for charging the power supplied from the booster circuit (110). The method of claim 2, The booster circuit 110, Charging unit 111 for charging the power, A controller 112 for outputting a control signal for controlling charging and discharging of the charging unit 111; Folding type rechargeable battery using a solar cell, characterized in that consisting of a switching unit 113 for performing an on-off operation by the control signal of the control unit (112). The method of claim 2, The protection circuit 120, PCM 122 for monitoring the voltage and current of the storage battery 130 to cut off the electrical circuit when detecting the overcharge voltage and the over-discharge voltage and overcurrent, A folding type rechargeable battery using a solar cell, characterized in that consisting of a PTC (121) for short circuit when overheating occurs. The method of claim 2, The storage battery 130, Folding type rechargeable battery using a solar cell, characterized in that the lithium-based secondary battery.