KR20050097615A - Handset for having multi cell battery structure - Google Patents

Abstract

A terminal having a multi-cell battery structure according to the present invention uses a plurality of battery cells to independently secure talk time and standby time regardless of current consumption by performing additional functions, thereby preventing an error of remaining battery indication from occurring. It is an object of the present invention to provide a terminal having a multi-cell battery structure that allows a user to accurately predict remaining talk time and standby time while providing a stable charging path.

In order to achieve the above object, the present invention provides a terminal for performing a call function and an additional function other than the call function, comprising: a multi battery unit having a plurality of divided cell regions and supplying power; A main processor that performs the call function, recognizes the remaining capacity of the multi-battery unit, and generates a plurality of switch control signals for controlling a charge / discharge path of the multi-battery unit; A discharge switch unit configured to set a discharge path between the plurality of cell regions, the main processing unit, and the additional function load according to the plurality of switch control signals; And a charging switch unit configured to set a charging path between an external power source and the plurality of cell areas according to the plurality of switch control signals.

Description

Terminal with multi-cell battery structure {HANDSET FOR HAVING MULTI CELL BATTERY STRUCTURE}

The present invention relates to a terminal having a multi-cell battery structure, and more particularly, to a terminal having a multi-cell battery structure that effectively performs a stable power supply in a terminal having an additional function.

Currently, as the functions of portable terminals become more diverse, there is a demand for a battery power source having a larger capacity. However, there is a limit to the capacity of the battery, which requires an effective power management and power system.

1 is a block diagram illustrating a battery device of a conventional terminal, which will be described below.

First, the battery cell 110 is connected to a load, which is an input terminal for driving the entire terminal, and serves to supply power. In addition, the circuit protection unit 120 serves to stabilize the power supply from the battery cell 110 to prevent damage to the internal circuit of the terminal due to unstable power supply. On the other hand, the load 130 has a power input terminal for driving the entire terminal, the load for the camera module, the load for the camera large scale integrated circuit (LSI), the load for the external storage device, the load for the camera flash LED, the keypad LED Loads, audio amplifier loads, microprocessor loads, RF module loads, microphone / speaker loads, vibration motor loads and LCD module loads.

According to the above-described conventional technology, since a single battery cell takes the form of supplying power to all the electrical loads of the terminal, the amount of current required by the load increases as additional functions are added to the terminal.

2 is a graph showing a battery voltage (V) and a load current (I) according to the use of the camera module of the terminal. Referring to this, the voltage change of the battery that appears when the high current flash LED is used according to the use of the camera module is shown. Able to know. That is, a voltage drop occurs as a large amount of current is suddenly drawn from the battery cell 110, and a voltage recovery time is required due to the voltage drop. As a result, an error of a residual battery indication occurs, and in a severe case, voltage The terminal may be reset due to the drop. For example, when 1A is supplied while the voltage of the battery cell 110 is 3.8V, the output voltage becomes 3.3V because of the voltage drop of the internal resistance, assuming that the internal resistance is 0.5 kV. The sudden change in the output voltage affects the reset IC sensing the voltage change and resets the terminal.

That is, when a large amount of current is consumed due to the additional function of the terminal, not only the talk time and standby time is reduced due to the limited battery capacity, but also the error of the remaining battery indication occurs, thereby allowing the user to adjust the remaining talk time and standby time. There is a problem of being unpredictable.

The present invention has been made to solve the above problems, by using a plurality of battery cells to ensure the talk time and standby time independently, regardless of the current consumption by performing the additional function, so that the error of the remaining battery display does not occur It is an object of the present invention to provide a terminal having a multi-cell battery structure that allows a user to accurately predict remaining talk time and standby time while providing a stable charging path.

In order to achieve the above object, a terminal having a multi-cell battery structure according to an embodiment of the present invention, in a terminal performing a call function and an additional function other than the call function, includes a plurality of divided cell areas and supplies power to a multi battery. part; A main processor that performs the call function, recognizes the remaining capacity of the multi-battery unit, and generates a plurality of switch control signals for controlling a charge / discharge path of the multi-battery unit; A discharge switch unit configured to set a discharge path between the plurality of cell regions, the main processing unit, and the additional function load according to the plurality of switch control signals; And a charging switch unit configured to set a charging path between an external power source and the plurality of cell areas according to the plurality of switch control signals.

Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily implement the technical idea of the present invention. .

First, Figure 3 is a block diagram showing a terminal having a multi-cell battery structure according to an embodiment of the present invention, the terminal having a multi-cell battery structure of the present invention, the multi battery unit 310, the main processor 320 ), The discharge switch unit 330 and the charge switch unit 340.

The multi-battery unit 310 includes a plurality of divided cell regions, and serves to supply power to the main processor 320, the discharge switch unit 330, and the charge switch unit 340, which will be described later. do.

In addition, the main processing unit 320 performs a call function of the terminal, generates a plurality of switch control signals for controlling the charge and discharge path of the multi-battery unit 310, the discharge to be described later the plurality of switch control signals It serves to output to the switch unit 330 and the charging switch unit 340. Here, the main processor 320 may detect the remaining capacity of the battery by sensing the power supplied by the multi-battery unit 310, and may include a microprocessor, an RF module, a microphone / speaker, a vibration motor, and an LCD module. To control.

On the other hand, the discharge switch unit 330, according to the plurality of switch control signals input from the main processor 320, the discharge path between the plurality of cell areas, the main processor 320 and the additional function load. It is responsible for setting. Here, the additional function load is provided with a power input terminal for driving the entire terminal, and is supplied with power through the switch unit 330. For example, the additional function load may include a load for a camera module, a load for a camera large scale integrated circuit (LSI), a load for an external storage device, a load for a camera flash LED, a load for a keypad LED, a load for an audio amplifier, and the like. Include.

In addition, the charging switch unit 340 sets a charging path between an external power source and the plurality of cell regions according to the plurality of switch control signals input from the main processor 320.

4 is a block diagram illustrating the multi-battery unit 310 of FIG. 3, which will be described below.

The sub cell 411 mounted in the multi battery unit 310 serves to supply auxiliary power to the terminal. Here, the subcell 411 may supply power to a camera module load, a camera large scale integrated circuit (LSI) load, an external storage device load, a camera flash LED load, a keypad LED load, an audio amplifier load, and the like. Preferred but not limited to supply.

In addition, the first circuit protection unit 412 mounted in the multi-battery unit 310 stabilizes the supply power from the sub-cell 411 to prevent the terminal internal circuit from being damaged due to unstable power supply. Play a role.

On the other hand, the main cell 421 mounted in the multi-battery unit 310 serves to supply main power. Here, the main cell 421 is preferably supplied to the microprocessor load, the RF module load, the microphone / speaker load, the vibration motor load and the LCD module load, but not limited thereto.

In addition, the second circuit protection unit 422 mounted in the multi-battery unit 310 stabilizes the supply power from the main cell 421 to prevent damage to the internal circuit of the terminal due to unstable power supply. Play a role.

FIG. 5 is a block diagram illustrating the main processor 320 of FIG. 3.

The ADC 510 mounted in the main processor 320 receives a plurality of voltages from the multi battery unit 310, converts the plurality of voltages into digital signals, and outputs the digital signals to the microprocessor 520 which will be described later. Do it.

In addition, the microprocessor 520 mounted in the main processor 320 receives the digital signal from the ADC 510, recognizes a battery remaining capacity based on the digital signal, and varies according to the remaining capacity. It is responsible for generating a plurality of switch control signals. Here, the microprocessor 520 calculates the residual capacity by comparing the digital signal value with reference to the buffer state and the complete discharge state of the discharge curve data of the battery.

FIG. 6 is an exemplary view illustrating the discharge switch unit 330 of FIG. 3.

The first switch 610 mounted in the discharge switch unit 330 includes the main cell 421 and the main processor 320 under the control of the plurality of switch control signals received from the main processor 320. It serves to conduct and block the first path, which is the path therebetween.

In addition, the second switch 620 mounted in the discharge switch unit 330 is used for the sub-cell 411 and the additional function according to the control of the plurality of switch control signals received from the main processor 320. It serves to conduct and interrupt the second path, which is the path between the loads. Here, when only the call function is activated, the main processor 320 generates the plurality of switch control signals for turning on the first switch 610 and turning off the second switch 620. When the call function and the additional function are activated, the plurality of switch control signals for turning on the first switch 610 and the second switch 620 may be generated, but is not limited thereto.

On the other hand, the third switch 630 mounted in the discharge switch unit 330 is a path between the first path and the second path under the control of the plurality of switch control signals received from the main processor 320. Serves to conduct and block the third pathway. Here, when the capacity of the main cell 421 is exhausted, the main processor 320 turns off the first switch 610 and the second switch 620 and the third switch 630. Generating the plurality of switch control signals for turning on the second switch; and when the capacity of the sub cell 411 is exhausted, the first switch 610 and the third switch 630 are turned on and the second switch ( The plurality of switch control signals for turning off 620 may be generated, but is not limited thereto.

FIG. 7 is an exemplary view showing the charging switch unit 340 of FIG. 3.

The first charging switch 710 mounted in the charging switch unit 340 is connected to the main cell 421 under the control of the charging switch control signal among the plurality of switch control signals input from the main processor 320. It serves to conduct and interrupt the path between external power sources.

In addition, the second charge switch 720 mounted in the charge switch unit 340 conducts a path between the subcell and an external power source under the control of the charge switch control signal input from the main processor 320. And blocking. Here, the first charging switch 710 and the second charging switch 720 may be turned on and off alternately.

FIG. 8 is a circuit diagram illustrating the first switch 610 of FIG. 6, which will be described below.

The bipolar transistor 810 mounted in the first switch 610 has an emitter terminal grounded and receives a first switch control signal among the plurality of switch control signals as a base terminal, and the collector terminal is a PMOS transistor described later. It is connected to the gate terminal of 830 serves to perform a switching operation.

In addition, a resistor 820 mounted in the first switch 610 may include a first terminal connected to a collector terminal of the bipolar transistor 810 and a second terminal connected to the main cell 421. Serves to provide.

Meanwhile, in the PMOS transistor 830 mounted in the first switch 610, a source terminal is connected to the main cell 421, a gate terminal is connected to a collector terminal of the bipolar transistor 810, and a drain terminal. Is connected to the main processor 320 to perform a switching operation.

FIG. 9 is a circuit diagram illustrating the first charging switch 710 of FIG. 7.

The bipolar transistor 910 mounted in the first charge switch 710 has an emitter terminal grounded, receives a charge switch control signal among the plurality of switch control signals to a base terminal, and a collector terminal of which is described later. It is connected to the gate terminal of 930 to perform a switching operation.

In addition, the resistor 920 mounted in the first switch 610 has a role of providing a resistance value by connecting a first terminal to a collector terminal of the bipolar transistor 910 and a second terminal to an external power source. Do it.

Meanwhile, in the NMOS transistor 930 mounted in the first switch 610, a source terminal is connected to an external power source, a gate terminal is connected to a collector terminal of the bipolar transistor 910, and a drain terminal is connected to the main cell. It is connected to 421 to perform a switching operation.

FIG. 10 is a circuit diagram illustrating the second charging switch 720 of FIG. 7, which will be described below.

In the NMOS transistor 930 mounted in the second charge switch 720, a source terminal is connected to an external power source, a charge terminal control signal is input to a gate terminal, and a drain terminal is connected to the subcell 411. It serves to perform the switching operation.

Referring to the operation of the terminal having a multi-cell battery structure according to an embodiment of the present invention described above are as follows.

First, when the user activates the power of the terminal, power is supplied from the main cell 421 to the main processor 320 through the first switch 610 turned on by the first switch control signal, thereby providing a basic terminal operation (for example, Telephone calls and text messages). That is, the first switch 510 may conduct and block the first path, which is a path between the main cell 421 and the main processor 320, according to a user input.

If the user activates the additional function, the main processor 320 generates a second switch control signal for turning on the second switch 620, and thus power is supplied from the subcell 411 to the load for the additional function. To perform additional operations (eg, camera shooting, MP3 player operation, etc.). That is, when the additional function is not used, the second switch 620 is turned off to reduce unnecessary current consumption.

In addition, when the battery remaining capacity of the main cell 421 falls below a predetermined level, the main processor 320 detects this and turns on the third switch 630 to supply the terminal with the power supply of the sub cell 411. It will work.

On the other hand, when the charger is connected to the terminal, the first charging switch 710 is immediately turned on, which is to charge the main cell 421 first during charging.

Thereafter, the first charging switch 710 and the second charging switch 720 are alternately turned on and off according to the control of the charging switch control signal among the plurality of switch control signals input from the main processor 320.

That is, in the charging operation, the charging of the main cell 421 starts-> the buffer of the main cell 421-> the switching switch control signal is switched from the first logic step (Low) to the second logic step (High)-> sub-cell (411) Charge start-> buffer of sub-cell 411-> charge switch control signal is switched from the second logic step (High) to the first logic step (Low)-> main cell 421 charge start It may be repeated but not limited to.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawings shown.

The present invention, by using a plurality of battery cells to ensure the talk time and standby time independently, regardless of the current consumption by performing the additional function, the remaining talk time and standby time by the user so that the error of the remaining battery indication does not occur There is an advantage to be able to predict correctly.

1 is a block diagram showing a battery device of a conventional terminal;

2 is a graph showing a battery voltage (V) and a load current (I) according to the use of a camera module of the terminal,

3 is a block diagram showing a terminal having a multi-cell battery structure according to an embodiment of the present invention;

4 is a block diagram illustrating a multi battery unit of FIG. 3;

5 is a block diagram illustrating a main processor of FIG. 3;

6 is an exemplary view showing a discharge switch of FIG. 3;

7 is an exemplary view illustrating a charging switch of FIG. 3;

8 is a circuit diagram illustrating a first switch of FIG. 6;

9 is a circuit diagram illustrating a first charging switch of FIG. 7;

FIG. 10 is a circuit diagram illustrating a second charging switch of FIG. 7. FIG.

Explanation of symbols on the main parts of the drawings

310: multi battery unit 320: main processing unit

330: discharge switch unit 340: charge switch unit

Claims (5)

A terminal for performing a call function and additional functions other than the call function, A multi battery unit having a plurality of divided cell regions and supplying power; A main processor that performs the call function, recognizes the remaining capacity of the multi-battery unit, and generates a plurality of switch control signals for controlling a charge / discharge path of the multi-battery unit; A discharge switch unit configured to set a discharge path between the plurality of cell regions, the main processing unit, and the additional function load according to the plurality of switch control signals; And A charge switch unit configured to set a charge path between an external power source and the plurality of cell regions according to the plurality of switch control signals; Terminal having a multi-cell battery structure comprising a. The method of claim 1, wherein the multi battery unit, A sub cell supplying auxiliary power; And Main cell supplying main power A terminal having a multi-cell battery structure comprising a. The method of claim 1, wherein the main processing unit, An ADC that receives a plurality of voltages from the multi-battery unit and converts the plurality of voltages into digital signals; And A microprocessor that recognizes the remaining battery capacity by the digital signal, and generates the plurality of switch control signals according to the remaining capacity Terminal having a multi-cell battery structure comprising a. The method of claim 2, wherein the charge switch unit, A first charging switch configured to conduct and block a path between the main cell and an external power source under control of a charge switch control signal among the plurality of switch control signals; And A second charging switch which conducts and blocks a path between the subcell and an external power source according to the control of the charge switch control signal; Including, The first charge switch and the second charge switch are alternately turned on and off Terminal having a multi-cell battery structure, characterized in that. The method of claim 4, wherein the first charging switch, An emitter terminal having a ground and a first transistor configured to receive the charge switch control signal to a base terminal; And A drain terminal is connected to an external power source, a gate terminal is connected to a collector terminal of the first transistor, and a source transistor is connected to the main cell. Terminal having a multi-cell battery structure comprising a.