KR100608518B1 - The apparatus of charging battery with easy carrying - Google Patents

Abstract

The present invention relates to a portable rechargeable battery pack device for supplying power to a portable electronic device, and more particularly, to include a protection circuit unit, a current detector, a voltage detector, a voltage riser, a controller, and a residual voltage display on one side of the battery terminal. By forming at least one battery cell inside, users can use the high-capacity battery with high stability and efficiency, and it is easy to carry, and it can be connected anywhere. USB connector and 24-pin TTA (Telecommunication Technology Association) connector It is compatible with portable electronic devices and can be charged, and the current battery level is divided into 5 levels of LEDs to display externally so that you can see at a glance whether charging is necessary.

Rechargeable Battery Pack, Protection Circuit, Voltage Rising Part, Residual Voltage Display Part

Description

Portable Rechargeable Battery Pack Device {THE APPARATUS OF CHARGING BATTERY WITH EASY CARRYING}

1 is a schematic diagram showing a power supply unit of an electronic apparatus incorporating two or more battery packs in the related art;

2 is a perspective view of a portable rechargeable battery pack device according to the present invention;

3 is a block diagram showing the overall configuration of a portable rechargeable battery pack device according to the present invention;

4 is a circuit diagram showing a protection circuit unit of the overall components of the portable rechargeable battery pack device according to the present invention;

FIG. 5 is a circuit diagram showing a voltage riser among the overall components of a portable rechargeable battery pack device according to the present invention; FIG.

6 is a circuit diagram illustrating a controller, a voltage detector, and a current detector among the overall components of the portable rechargeable battery pack device according to the present invention;

7 is a circuit diagram showing a residual voltage display unit of the overall components of a portable rechargeable battery pack device according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: Portable rechargeable battery pack device 2: USB connector

3: 24 pin TTA connector 10: Protection circuit

20: voltage riser 30: current detector

40: voltage detector 50: controller

60: residual voltage display unit

The present invention relates to a portable rechargeable battery pack device for supplying power to a portable electronic device, and relates to an external battery for supplying power to a portable electronic device such as a mobile phone, a PSP, a PDA, a PMP, a notebook, and the like.

In portable electronic devices such as mobile phones, PSPs, PDAs, PMPs, and notebooks, effective power supply is one of the main challenges. In particular, since the adapter cannot be used while on the move, the laptop is started using a rechargeable battery.

In general, rechargeable battery devices form a single pack by tying several unit cells due to the limited capacity of the battery unit cell, and depending on the type of cells used and the voltage and current consumption required by the electronic device to be used. Tied up in a way.

In general, in portable electronic devices such as laptops, PDAs, and DVDs that use Li-ion or Li-polymer cells as unit cells, 2 to 4 cells are connected in series depending on the voltage used. In order to increase the use time, nSXmP (n = 2-4, m = 2-3) packs in which two or three cells are connected in parallel are used.

However, when a plurality of cells are connected in parallel / parallel to increase the use time, it is difficult to shorten the life of the battery pack due to the imbalance between cells during repeated use and to reduce the safety.

This problem increases as the number of cells connected in series / parallel increases.

US patents US 5485073 and US Pat. No. 5,818,200 propose a method of mounting two or more battery packs in one electronic device as a method of increasing the use time while compensating for the above drawbacks.

1 is a schematic diagram of a power supply unit of an electronic device including two or more battery packs.

As shown, the commercial AC input is rectified and transformed into DC through the AC / DC adapter, and is directly inputted to the power of the electronic device according to the switching operation of the switch S1, or the battery cell in the built-in battery pack is connected to the charging circuit. To charge.

In the drawing, switch S2 inputs or cuts off the power charged in the battery pack according to the on / off operation, and switch S3 and switch S4 are currents for charging or discharging the corresponding battery pack according to the on / off operation, respectively. Open or close the path.

However, the technology that mounts two or more battery packs inside the electronic device is used for internal smart (SMART: Self-Monitoring Analysis and Reporting Technology) communication to recognize the battery pack, determine the charging and discharging order, and remaining battery capacity. There is an advantage that the effective control is possible, but there is a problem that the size and weight is increased by mounting a plurality of battery packs inside the electronic device.

In portable electronic devices, an increase in size and weight may be a fatal disadvantage, and thus an external battery pack has emerged. This external battery pack has an advantage of using a relatively long time compared to the built-in type. Self-Monitoring Analysis and Reporting Technology that provides power to the device and additionally displays the battery capacity, and performs self-diagnosis during operation like a built-in and informs the user when a problem is expected. In addition to the problem of not having a function, there are problems such as shortening the lifespan, safety, and long charging time due to the imbalance between the cells by controlling a large number of cells connected in series / parallel.

Recently, a portable charger with a built-in rechargeable battery has been developed and used to temporarily charge a battery of a portable phone in a place where power is not supplied or to temporarily supply power when the battery is over discharged. There is a compatibility problem that can only be used for the device (ie, a mobile phone), but cannot be used to drive other devices or to charge a battery built in the device.

The present invention was invented to solve the above problems, and provides an external rechargeable battery pack device for supplying power to portable electronic devices by forming at least one battery cell inside the portable rechargeable battery pack,

It displays the remaining battery level step by step to indicate whether it needs to be charged and provides a portable rechargeable battery pack device that is compatible with the power supply of various portable electronic devices such as mobile phones, PSPs, PDAs, PMPs, and laptops. The purpose is.

In order to achieve the above object, the portable rechargeable battery pack device according to the present invention,

It is formed in a box-shaped box-shaped cigarette box, and an input port consisting of a USB connector and a 24-pin TTA connector is formed on one side of the box to selectively couple the output connector of the external rectifier.

The circuit

A protection circuit unit (PCM) connected to one side of a battery (+,-) terminal to control overcharge and overdischarge respectively input to an internal rechargeable battery;

 Connected to one side of the rechargeable battery, it detects the level of the analog voltage applied to the charging or discharging path, converts it to digital, and boosts the output voltage (+ 5V, 1A) through the control of the controller to the USB connector (2). A voltage rising part (Step-Up) 20 to output;

A current detector 30 connected to one side of an external device battery 110 and measuring input current and load current respectively;

A voltage detector 40 measuring a voltage of the battery 110 for the external device;

It is applied to the auxiliary power supply unit 55 connected to one output terminal of the transistor Q3 of the power rising unit 20 to refer to the output signals of the current detector 30 and the voltage detector 40, and as a control voltage. A control unit 50 for turning on the power of the auxiliary power supply unit 55 so that the input current is supplied, and adjusting the level of the control voltage to adjust the input current amount according to the load current amount;

It is achieved by being composed of the residual voltage display unit 60 which displays the residual voltage of the internal rechargeable battery under the control of the control unit 50.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

2 is a perspective view of a portable rechargeable battery pack apparatus according to the present invention, Figure 3 is a block diagram showing the overall configuration of the portable rechargeable battery pack apparatus according to the present invention.

It is formed in a box size of a cigarette pack, and a portable rechargeable battery pack device having an input port formed of a USB connector 2 and a 24-pin TTA connector 3 to selectively couple an output connector of an external rectifier to one side thereof. ).

In addition, at least one battery cell is formed as an internal power supply device of a portable electronic device such as a mobile phone, a PSP, a PDA, a PMP, a notebook computer, and a protection circuit part, a voltage detector, and a current at one side of the battery cell terminals The detector, the voltage riser, the controller, and the residual voltage display are connected, and a USB connector (2) consisting of a Pack Plus output terminal DP (+) and a Pack Minus output terminal DP (-) is connected to one side of the output terminal. The battery cells are charged through the USB power port. Here, the adapter may be installed on one side instead of the USB connector 2 to receive external power.

On the other side of the output terminal, a mobile phone is connected via a 24-pin TTA connector (3) consisting of a CP + input terminal (+ 4.2V) and a CP + indicating a battery plus output terminal, and a CP- indicating a pack negative input terminal and a battery negative output terminal. It is connected to the pin-insertable power connector of PSP, PDA, PMP, and notebook and is loaded (Loader).

4 is a circuit diagram showing a protection circuit unit of the overall components of the portable rechargeable battery pack device according to the present invention.

The protection circuit unit 10 according to the present invention is connected to one side of the battery (+,-) terminal to control overcharge and overdischarge which are input to the internal rechargeable battery, respectively. The built-in protection IC (U1) for the lithium ion / lithium polymer secondary battery is formed on one side of the center, and the VDD of the protection IC (U1) for the lithium ion / lithium polymer secondary battery is connected to the resistor R5. The secondary power supply input terminal (VSS) is connected to the capacitor C4, the discharge control FET gate connection terminal DO is connected to the gate side of the n-channel MOSFET Q1, and the charge control FET gate connection terminal CO is the n-channel MOSFET Q2. It is connected to the gate side of, and the voltage detection terminal (overcurrent detection terminal) between the VM and VSS VM is configured by connecting to the capacitor C5 through the resistor R9.

The resistor R5 is connected to one side of the battery + terminal, and serves to prevent an electrical short down and input of an instantaneous overcurrent into the circuit.

By applying a small resistor from the resistor R9 to the resistor R5, it is possible to prevent the voltage between VDD and VSS from exceeding the absolute maximum rating due to the current flowing from the charger to the IC by the charger reverse connection.

During discharge, the ON signal is applied to the gate of Q1 and the OFF signal is applied to the gate of Q2 to discharge to the rechargeable battery P +,-through the capacitor C9 (2.6V to 4.2V, 2A). Will be

On the other hand, when charging, the OFF signal is applied to the gate of Q1, and the ON signal is applied to the gate of Q2, and the charging voltage (4.2V) is applied to the rechargeable batteries P + and-through the capacitor C9. Through the pin connector, it is connected to the pin-insertable power connector of the mobile phone, PSP, PDA, PMP, and notebook and is loaded (Loader).

A detailed operation of the protection circuit unit having such a configuration will be described.

The protection IC (U1) for the lithium ion / lithium polymer secondary battery of the protection circuit part has a built-in high-precision voltage detection circuit, and the overcharge detection voltage is about 3.9V to 4.4V (5mVStep). ± 25mV (25 ℃), ± 30 mV (-5 degreeC-+55 degreeC) can be set, More preferably, it is set to 4.28V +/- 25mV. This overcharge detection voltage blocks the battery from being charged above 4.28V from the rechargeable battery.

In addition, the overcharge release voltage can be set to about 3.8V to 4.4V (* 1) about ± 50mV, more preferably 4.13V +/- 50mV.

The overcharge release voltage can be expressed as in Equation 1 below.

Here, the overcharge hysteresis width is selected in 50mVStep from 0.0 to 0.4V range.

In this way, the overcharge release voltage can be set.

On the other hand, the overdischarge detection voltage can be set to about 2.0 mV to 3.0 V (100 mV Step correspondence) about ± 80 mV, more preferably 2.60 V +/- 80 mV. This overdischarge detection voltage blocks the battery from overdischarging below 2.60V from the external loader.

The overdischarge release voltage can be expressed as in Equation 2 below.

Here, the overdischarge hysteresis width can be selected from 100 mVStep within the range of 0.0 to 0.7 V. In the present invention, the overdischarge release voltage is set to 3.10 V +/- 100 mV.

The overcurrent detection voltage is set to about 0.05 V to 0.3 V (corresponding to 5 mV Step) ± 30 mV, more preferably 1.0 A +/− 0.2 A.

By setting the overcurrent detection voltage, it is possible to cut off the overcurrent from the external loader.

FIG. 5 is a circuit diagram illustrating a voltage riser among the overall components of a portable rechargeable battery pack device according to the present invention.

The voltage increaser 20 according to the present invention is connected to one side of the rechargeable battery, detects the level of the analog voltage applied on the charge or discharge path, converts it to digital, and controls the output voltage (+ 5V, 1A) is stepped up and output to USB connector, which has a high efficiency low voltage n-channel controller IC for switching regulator formed in the center, and current sense input terminal I _SEN of high efficiency low voltage n-channel controller IC for switching regulator is external It is connected to sensing resistor R4 and capacitor C3, compensating terminal COMP is connected to resistor R7 and capacitor C7 to set the compensation value for the control loop, and feedback terminal FB is connected to one side for external devices through voltage distribution of resistors R6 and R8. Supply 5V output voltage to battery, drive terminal DR connected to external n-channel MOSFET Q3, frequency regulation and shortdown terminal FA / SD connected to resistor R2 The power supply input terminal V _IN is connected to the smooth and rectified power supply via capacitor C2 connected to one side of the rechargeable battery.

A detailed operation process of the voltage riser 20 having such a configuration will be described.

Power supply input terminal V _IN of high efficiency low voltage n-channel controller IC for switching regulator by accumulating and smoothing current supplied from internal rechargeable battery (2.6V ~ 4.2V) to capacitor C2 To drive the IC. At the same time, the high voltage is generated by inducing the current supplied from the internal rechargeable battery (2.6V to 4.2V) to the inductor L1. It is set to generate + 5V by the n-channel MOSFET Q3 connected to one output terminal of the inductor L1.

This + 5V setting is sensed by the sense resistor R4 connected to the lower end of Q3, accumulated in the capacitor C3 and set by the current sense input terminal I _SEN . That is, when the current sense input terminal I _SEN is input, the "high" signal is output to the drive terminal DR by the program logic inside the IC, and the n-channel MOSFET Q3 connected to the gate is turned on by the "high" signal to turn on the inductor L1. The + 5V generated on the output terminal side of is transferred to the battery for external device as output voltage.

6 is a circuit diagram illustrating a controller, a voltage detector, and a current detector among the components of the portable rechargeable battery pack apparatus according to the present invention.

The controller 50 according to the present invention refers to the output signals of the current detector 30 and the voltage detector 40, and turns on the power of the protection power supply unit 55 with a control voltage to the input current. Is supplied to, but adjusts the level of the control voltage so that the input current amount is adjusted according to the load current amount, which is the auxiliary power supply unit connected to one side of the output voltage (Vout + 5V) of the voltage increase unit 20 ( 55 is connected to one side of the auxiliary power supply unit 55, and in the external device loader mode through the current detector 30 and the voltage detector 40, the external device battery 110 is connected according to the load current amount. The level of the control voltage is adjusted to adjust the amount of input current.

Here, the current detector 30 and the voltage detector 40 are sensed through the resistor R22 of the auxiliary power supply unit 55 to detect the input current, the load current, and the voltage of the battery for the external device.

An operation process of the controller, the voltage detector, and the current detector according to the present invention having such a configuration will be described.

In the external device loader mode, the controller 50 outputs the control voltage V_CTL "high", which is supplied to the transistor Q4 of the auxiliary power supply unit 55. Thus, the transistor Q4 is turned on, whereby the base of the transistor Q5 is " low " and the transistor Q5 is also turned on.

Accordingly, the input current i1 supplied from the voltage riser 20 is transferred to the terminal of the battery 110 for the external device through the transistor Q5 and the resistor R22 of the auxiliary power supply unit 55. The external device battery 110 begins to charge. Here, the battery for an external device refers to a rechargeable battery of various portable electronic devices such as a mobile phone, PSP, PDA, PMP, notebook.

In this state, when some functions of the mobile phone, which is an external device, for example, a call function is used, the load current i3 is supplied to the communication unit 100, and the load current i3 is the transistor Q5. It is supplied from the current i1 supplied through.

At this time, when the load current value i3 consumed by the communication unit 100 is smaller than the input current value i1, a part of the current i1 is changed to the load current i3 without changing the input current value i1. ), The remaining current i2 is transferred to the external device battery (), and the charging operation of the external device battery 110 is continued.

However, when the controller 50 analyzes the current detection result of the current detector 30, it is determined that the load current value i3 consumed by the communication unit 100 is greater than the input current value i1. Next, the charging voltage of the battery 110 for the external device is determined based on the output signal of the voltage detector 40, and the level of the control voltage V_CTL is gradually increased until the voltage level does not decrease.

Accordingly, the bias current of the transistor Q5 is further increased, and the input current value i1 is increased correspondingly to cover the load current value i3 consumed by the communication unit 100. At this time, the rising operation of the control voltage V_CTL is stopped and the current level is maintained.

Therefore, at this time, the charging current i2 and the discharge current i4 of the battery 110 for external device are maintained at zero values. That is, the charging voltage of the battery 110 for the external device is maintained at the current level.

Subsequently, when the controller 50 analyzes the current detection result of the current detector 30 at a predetermined cycle, the load current value i3 consumed by the communication unit 100 is 0 or smaller than the input current value i1. If it is found that, the charging operation is resumed by lowering the control voltage V_CTL to the original " high " level.

6 is a circuit diagram illustrating a residual voltage display unit of the overall components of a portable rechargeable battery pack device according to the present invention.

The residual voltage display unit 60 according to the present invention displays a residual voltage of an internal rechargeable battery under the control of the control unit 50. The 4-channel amplification IC is formed at one side of the center, and the 4-channel The first channel output terminal OUT1 of the operational amplifier IC is connected via a resistor R17 to LED 1 indicating the remaining battery charge of 3.92V to 4.08V (more than about 90%), and the second channel output terminal OUT2 is connected to the battery via a resistor R18. The remaining charge is connected to LED 2 indicating 3.76 ~ 3.86V (approximately 80% or more). The fourth channel output terminal OUT4 is connected to the LED3 indicating the battery level of 3.64V to 3.74V (more than 40%) through the resistor R19, and the power input terminal VCC is connected to the battery of the 2.6V ~ It is configured in connection with LED 5 indicating 3.3V (less than about 10%).

Then, the switch SW1 is connected to one side of the portion where the power input terminal VCC and the LED 5 are connected.

The remaining battery value of 3.92 V to 4.08 V (about 90% or more) of the LED 1 is outputted to the first channel output terminal OUT1, which is obtained by converting the voltage obtained from the resistor R12 to the input terminal IN1 of the first channel OP amplifier. ), And compare the setpoint output value obtained by applying the voltage obtained by voltage division of + 5V output of the voltage increase part through the control of the control unit with the resistors R10 and R11 to the + input terminal IN1 (+) of the first channel OP amplifier. Let it be V ~ 4.08V.

The remaining battery value of 3.76V to 3.86V (about 80% or more) in the LED 2 is output to the second channel output terminal OUT2, which is a voltage obtained by voltage division by the resistors R12 and R13. The voltage obtained by applying voltage to the input terminal IN2 (-) and dividing the output voltage + 5V of the voltage increase part through the control of the control unit by the resistors R10 and R11 is applied to the + input terminal IN2 (+) of the second channel OP amplifier. Set the comparison setpoint output value to 3.76 to 3.86 V (about 80% or more).

The remaining battery value of 3.64V to 3.74V (about 40% or more) of the LED 3 is output to the fourth channel output terminal OUT4, which is a voltage obtained by voltage division by the resistors R12 and R13 of the fourth channel OP amplifier. Apply voltage to the input terminal IN4 (-) and divide the output voltage + 5V of the voltage riser by the control of the controller to voltage input by the resistors R10 and R11 to the + input terminal IN4 (+) of the 4th channel OP amplifier. Set the obtained comparison set value output value to 3.64V to 3.74V (about 40% or more).

The remaining battery value of 3.50V to 3.60V (about 20% or more) of the LED 4 is output to the third channel output terminal OUT3, which is a voltage obtained by voltage division by the resistors R12, R13 and R14. The voltage obtained by applying + 5V of the output voltage riser of the voltage riser through voltage control by the resistors R10 and R11 to the + input terminal IN3 (+) of the third channel OP amplifier. Set the comparative setpoint output value obtained by adding 3.50V to 3.60V (about 20% or more).

In the LED 5, the remaining battery value of 2.6V to 3.3V (about 10% or less) is set to 2.6V to 3.3V (about 10% or less) of the voltage obtained at the switch SW1 resistance to display the remaining capacity of the internal rechargeable battery as it is. do.

Through this configuration, when the switch SW1 is pressed, the remaining amount of the current internal rechargeable battery may be checked by LED 5 to check whether charging is required.

Although the present invention has been described with reference to the accompanying drawings, it is apparent to those skilled in the art that various modifications are possible without departing from the scope of the invention, which is covered by the following claims.

As described above, the portable rechargeable battery pack apparatus may provide an external rechargeable battery pack apparatus for supplying power to portable electronic devices by forming at least one battery cell inside the portable rechargeable battery pack.

The remaining battery level can be displayed step by step to indicate if it needs to be charged, and the USB connector on one side and the 24-pin TTA connector can be used to supply power to various portable electronic devices such as mobile phones, PSPs, PDAs, PMPs, and laptops. There is a good effect to be compatible.

Claims (7)

A portable rechargeable battery pack 1 having a box shape the size of a cigarette pack and having an input port formed of a USB connector 2 and a 24-pin TTA connector 3 on one side thereof to selectively couple an output connector of an external rectifier. Circuit, A protection circuit unit (PCM) connected to one side of a battery (+,-) terminal to control overcharge and overdischarge respectively input to an internal rechargeable battery;  Connected to one side of the rechargeable battery, it detects the level of the analog voltage applied to the charging or discharging path, converts it to digital, and boosts the output voltage (+ 5V, 1A) through the control of the controller to the USB connector (2). A voltage rising part (Step-Up) 20 to output; A current detector 30 connected to one side of an external device battery 110 and measuring input current and load current respectively; A voltage detector 40 measuring a voltage of the battery 110 for the external device; It is applied to the auxiliary power supply unit 55 connected to one output terminal of the transistor Q3 of the power rising unit 20 to refer to the output signals of the current detector 30 and the voltage detector 40, and as a control voltage. A control unit 50 for turning on the power of the auxiliary power supply unit 55 so that the input current is supplied, and adjusting the level of the control voltage to adjust the input current amount according to the load current amount; In the configuration of the residual voltage display unit 60 for displaying the residual voltage of the internal rechargeable battery under the control of the control unit 50, The residual voltage display unit 60 has a four-channel operational amplifier IC formed on one side of the center thereof, and the first channel output terminal OUT1 of the four-channel operational amplifier IC receives the voltage obtained from the resistor R12 through-input of the first channel OP amplifier. The comparison obtained by applying the voltage obtained by applying voltage + 5V to the terminal IN1 (-) and dividing the output voltage + 5V of the voltage increase part through the control of the controller by the resistors R10 and R11 to the + input terminal IN1 (+) of the first channel OP amplifier. The set value output value is 3.92V ~ 4.08V, and is connected to the LED 1 indicating the remaining battery capacity of 3.92V ~ 4.08V (about 90% or more) through the resistor R17, and the second channel output terminal OUT2 is connected by the resistors R12 and R13. The voltage obtained by dividing is applied to the -IN terminal IN2 (-) of the second channel OP amplifier, and the voltage obtained by voltage-dividing the output voltage + 5V of the voltage riser by the resistors R10 and R11 through the control of the control unit is divided into the second channel OP. The comparison setpoint output value obtained by applying the + input terminal IN2 (+) of the amplifier is 3.76 to 3.86. It is connected to LED 2 which shows 3.76 ~ 3.86V (approximately 80% or more) of battery through resistor R18 as V, and the third channel output terminal OUT3 removes the voltage obtained by voltage division by resistors R12, R13 and R14. The voltage obtained by applying the voltage + 5V output voltage of the voltage riser by the resistors R10 and R11 through the input of the input terminal IN3 (-) of the three-channel op amp and the input voltage IN3 of the third channel op amp. The set value output value obtained by adding to (+) is 3.50V ~ 3.60V, and it is connected to LED 4 which shows 3.50V ~ 3.60V (approximately 20% or more) through the resistor R20, and the fourth channel output terminal OUT4 is connected. The voltage obtained by voltage division by the resistors R12 and R13 is applied to the -input terminal IN4 (-) of the fourth channel op amp, and the output voltage + 5V of the voltage riser under the control of the controller is divided by the resistors R10 and R11. Comparison obtained by adding the obtained voltage to +4 input terminal IN4 (+) of the 4th channel OP amplifier The static output value is 3.64V ~ 3.74V, which is connected to LED3 indicating the battery level is 3.64V ~ 3.74V (more than 40%) through the resistor R19, and the power input terminal VCC is connected to the battery with 2.6V ~ The portable rechargeable battery pack device, characterized in that the switch is connected to the LED 5 indicating 3.3V (about 10% or less), the switch SW1 is connected to one side of the portion connected to the power input terminal VCC and LED 5. delete delete delete delete delete delete

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