Lee, Kwang Yeun (1-709, Gyeongnam Apt 649 Gaepo-don, Gangnam-gu Seoul 135-240, KR)
| 1. | A battery equipped with a super power module to increase battery performance and a battery lifetime, comprising: a super power module mounted to one side of a lithiumion battery or lithium polymer battery for use in handheld devices such as mobile phones, including a Protection Circuit Module (PCM); an error amplifier for determining whether a voltage value of a charged Electric Double Layer Capacitor (EDLC) is higher than a predetermined reference value, and instantaneously stopping a battery charging operation according to the determined result; a current detection comparator for preventing a current signal of more than a predetermined current value from being generated from the battery, and detecting a current value using an ONresistor of a Field Effect Transistor (FET) connected to the PCM circuit; a plurality of Pulse Width Modulation (PWM) circuits for generating a voltage higher than a battery voltage; and a charging unit for charging energy accumulated in a coil (inductor) in the EDLC via first and second FETs of the PWM circuits, wherein the PCM circuit, the error amplifier, the current detection comparator, the PWM circuits, and the charging unit are configured in the form of a modulus circuit. |
| 2. | The battery according to claim 1, wherein the charging unit 30 is mounted to one side of a lower end of the coil (inductor), charges battery power in the coil (inductor) upon receiving an output signal from an ORgate when the first FET is switched on, allows the first FET to be switched off when an oscillation frequency of an oscillator enters an OFFarea, and allows energy accumulated in the coil (inductor) to be charged in the EDLC via the second transistor. |
BATTERY EQUIPPED WITH SUPER POWER MODULE TO INCREASE BATTERY PERFORMANCE AND BATTERY
LIFETIME
Technical Field
[1] The present invention relates to a battery equipped with a super power module to increase a battery lifetime, and more particularly to a battery equipped with a small- sized super power module which is mounted to one side of a lithium-ion battery or lithium-polymer battery for use in various hand-held devices (e.g., mobile phones, motion-picture players, and digital cameras), includes an Electric Double Layer Capacitor (EDLC) and current limit/conversion circuits, improves performance of the battery, and increases a battery lifetime.
[2]
Background Art
[3] Generally, a lithium-ion battery circuit or a lithium-polymer battery circuit includes a protection circuit module (PCM) capable of preventing the overvoltage charge and the occurrence of overdischarge according to electrochemical characteristics, such that each battery circuit and the protection circuit module are generally used as a single battery pack.
[4] A battery for use in mobile phones includes output terminals (+,-), such that a current signal flowing in all loads flows in the battery. Therefore, the current signal is applied to the battery without any change according to operation functions of the mobile phones, such that the battery may be damaged whenever an instantaneous overcurrent flows in the battery. The above-mentioned battery for use in mobile phones prevents energy efficiency of 100% from being emitted on the condition that the value of a predetermined current signal is higher than a predetermined value (e.g., a 1C discharge and over) due to a battery production method, a battery construction material, and electrochemical characteristics, less oxidation-reduction reaction occurs during a chemical reaction caused by the flow of current signal, resulting in a reduced battery lifetime.
[5]
Disclosure of Invention Technical Problem
[6] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a battery equipped with a super power
module capable of maximally employing capacitance of a charged battery when a predetermined rated current does not flow in a lithium-ion battery or lithium-polymer battery for use in hand-held devices such as mobile phones, and causing no performance deterioration although the battery is charged or discharged several times, such that it can increase a battery lifetime.
[7]
Technical Solution
[8] In accordance with the present invention, the above and other objects can be accomplished by the provision of a battery equipped with a super power module to increase battery performance and a battery lifetime, comprising: a super power module mounted to one side of a lithium-ion battery or lithium-polymer battery for use in hand-held devices such as mobile phones, including a Protection Circuit Module (PCM), an error amplifier for determining whether a voltage value of a charged Electric Double Layer Capacitor (EDLC) is higher than a predetermined reference value, and instantaneously stopping a battery charging operation according to the determined result, a current detection comparator for preventing a current signal of more than a predetermined current value from being generated from the battery, and detecting a current value using an ON-resistor of a Field Effect Transistor (FET) connected to the PCM circuit, a plurality of Pulse Width Modulation (PWM) circuits for generating a voltage higher than a battery voltage, and a charging unit for charging energy accumulated in a coil (inductor) in the EDLC via first and second FETs of the PWM circuits, wherein the PCM circuit, the error amplifier, the current detection comparator, the PWM circuits, and the charging unit are configured in the form of a modulus circuit.
Advantageous Effects
[9] According to the present invention, the battery equipped with the super power module to increase battery performance and a battery lifetime includes a current limit & voltage conversion circuit in a PCM circuit mounted to one side of a lithium-ion battery or lithium-polymer battery for use in various hand-held devices (e.g., mobile phones, motion-picture players such as MPEG4- and DVD-players, and digital cameras). The current limit & voltage conversion circuit includes an OSC, a T-type latch, an SR-type latch, an OR-gate, a coil (inductor), and first and second FETs FETl and FET2. The battery equipped with the super power module mounts an EDLC to one side of the current limiter & voltage conversion circuit, such that a mobile-phone use time is increased by about 30%, a battery lifetime is also increased by 150% and greater. Also, the battery equipped with the super power module is simply comprised of a modulus circuit, such that it can be easily adapted to the conventional mobile-
phone battery, resulting in the implementation of high compatibility and reduced production costs. [10]
Brief Description of the Drawings
[11] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
[12] FlG. 1 is a block diagram illustrating a super power module according to the present invention;
[13] FlG. 2 is a battery circuit diagram illustrating the super power module according to the present invention;
[14] FlG. 3 shows the appearance of the super power module which is mounted to one side of an upper end of a battery, and having a predetermined size corresponding to l/5~l/20 of the size of a mobile-phone battery;
[15] FlG. 4 is a graph illustrating the comparison result between a conventional mobile- phone use time and an inventive mobile-phone use time on the basis of an operation time; and
[16] FlG. 5 is a graph illustrating the comparison result between a conventional battery lifetime (also called "the number of battery use times") and an inventive battery lifetime.
[17]
Best Mode for Carrying Out the Invention
[18] Now, preferred embodiments of the present invention will be described in detail with reference to the annexed drawings. In the drawings, the same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
[19] FlG. 1 is a block diagram illustrating a super power module according to the present invention. FlG. 2 is a battery circuit diagram illustrating the super power module according to the present invention. FlG. 3 shows the appearance of the super power module which is mounted to one side of an upper end of a battery, and having a predetermined size corresponding to 1/5—1/20 of the size of a mobile-phone battery. FlG. 4 is a graph illustrating the comparison result between a conventional mobile-phone use time and an inventive mobile-phone use time on the basis of an operation time. FlG. 5 is a graph illustrating the comparison result between a conventional battery lifetime (also called "the number of battery use times") and an inventive battery
lifetime.
[20] FlG. 1 is a block diagram illustrating a super power module according to the present invention.
[21] A super power module is mounted to one side of a lithium-ion battery or lithium- polymer battery for use in various hand-held devices (e.g., mobile phones, motion- picture players such as MPEG4- and DVD-players, and digital cameras), and includes a protection circuit module (PCM). A current limiter & voltage conversion circuit is mounted to one side of the PCM circuit. An EDLC (Electric Double Layer Capacitor) is mounted to one side of the current limit & voltage conversion circuit.
[22] In this case, the EDLC is slowly charged with electricity, and is then rapidly discharged, such that it includes a circuit for charging electricity less than a predetermined current signal in the EDLC itself.
[23] FIG. 2 is a battery circuit diagram illustrating the super power module according to the present invention. Referring to FIG. 2, the battery circuit of the super power module includes a PCM circuit 10, an error amplifier 21, a current detection comparator 22, a plurality of PWM (Pulse Width Modulation) circuits 23~26, and a charging unit 30.
[24] The error amplifier 21 determines whether a voltage value of the EDLC is higher than a predetermined voltage value, and instantaneously stops a battery charging operation according to the determined result.
[25] The current detection comparator 22 prevents a current signal of more than a predetermined current value from being generated from the battery, and detects the value of the current signal using an ON-resistor of an FET (Field Effect Transistor) connected to the PCM circuits 23~26. Each of the PWM circuits 23~26 includes an OSC (oscillator) 24, a T-type latch 25, an SR-type latch 23, an OR-gate 26, a coil (inductor), and first and second FETS (FETl, FET2) in order to generate a high voltage higher than a battery voltage.
[26] The oscillator 24 generates a waveform signal having a predetermined frequency to operate the PWM circuits.
[27] The T-type latch 25 rectifies a waveform signal of the OSC, and converts the rectified waveform signal into a square wave.
[28] The SR-latch 23 resets load to prevent a current signal from flowing in the load when the value of a voltage reaches a predetermined voltage value and the value of a current is higher than a current limit value.
[29] The charging unit 30 is mounted to one side of a lower end of the coil (i.e., inductor), and controls energy accumulated in the inductor to be charged in the EDLC via the first and second FETs FETl and FET2 of the PWM circuit.
[30] A method for driving the charging unit 30 will hereinafter be described. Individual
signals of the error amplifier 21, the current detection comparator 22, and the PWM circuits 23~26 are applied to the OR-gate, such that a logical result is shown in the output terminal of the OR-gate.
[31] The output signal of the OR-gate switches on the first FET FETl capable of charging battery power in the coil (i.e., inductor). If an oscillation frequency of the OSC 24 enters an OFF area, the first FET FETl is switched off, and energy accumulated in the coil (inductor) is charged in the EDLC via the second FET FET2.
[32] The above-mentioned operations are periodically repeated, and it is continuously monitored whether an output voltage is higher than a predetermined reference voltage, or a consumption current of the battery is higher than a current limit value, such that an ON-time of the first FET FETl is automatically adjusted.
[33] The super power module 100 including the error amplifier 21, the current detection comparator 22, the PWM circuits 23~26, and the charging unit 30 is reduced to a predetermined size corresponding to l/5~l/20 of the size of a mobile-phone battery. As shown in FIG. 3, the super power module 100 is built in or mounted to one side of the upper end of the battery 200, such that battery performance is improved and a battery lifetime is increased.
[34] When an experiment for comparing a use time and the number of repeated charging/discharging times of an inventive battery equipped with the super power module with those of a conventional battery is performed, a comparison result will hereinafter be described.
[35] FIG. 4 is a graph illustrating the comparison result between a conventional mobile- phone use time and an inventive mobile-phone use time on the basis of an operation time. Referring to FIG. 4, a reference character "Al" shows a battery voltage (i.e., a peak- voltage) when only a conventional pure battery is employed, a reference character "A2" shows a battery voltage (i.e., an RF switching-ON case) when only a conventional pure battery is mounted, a reference character "Bl" shows a battery voltage (i.e., a peak-voltage) when the super power module according to the present invention is employed, and a reference character "B2" shows a battery voltage (i.e., an RF switching-ON case) when the super power module according to the present invention is employed.
[36] When comparing the Al graph with Bl, A2, and B2 graphs, a mobile-phone use time "B3" of the battery voltage formed when the super power module is employed is about 130 hours, whereas a mobile-phone use time "A3" of the battery voltage formed when only the conventional pure battery is employed is 100 hours, such that it can be recognized that the mobile-phone use time of the super power module is longer than that of the conventional pure battery by a predetermined time corresponding to about 30%.
[37] FlG. 5 is a graph illustrating the comparison result between a conventional battery lifetime (also called "the number of battery use times") and an inventive battery lifetime. In accordance with the present invention, a battery equipped with the super power module controls energy accumulated in the coil (i.e., inductor) to be periodically charged in or discharged from the EDLC using the first and second FETs FETl and FET2, such that the number of repeated charging/discharging times is 500 and battery discharge capacitance is 80OmAh, resulting in a battery charging/discharging rate of 90%. On the contrary, the conventional pure battery has the number of repeated charging/discharging times of 300 and battery discharge capacitance is 70OmAh, resulting in a battery charging/discharging rate of 60%.
[38] In other words, it can be recognized that the battery equipped with the super power module has a battery lifetime longer than that of the conventional pure battery.
[39] It should be noted that the above-mentioned circuit is not limited to the above example, and can be improved or modified in various ways by those skilled in the art according to various purposes as necessary.
[40]
[41]
Industrial Applicability
[42] As apparent from the above description, the battery equipped with the super power module according to the present invention to increase battery performance and a battery lifetime includes a current limit & voltage conversion circuit, which includes an OSC, a T-type latch, an SR-type latch, an OR-gate, a coil (inductor), and first and second FETs FETl and FET2, in a PCM circuit mounted to one side of a lithium-ion battery or lithium-polymer battery for use in various hand-held devices (e.g., mobile phones, motion-picture players such as MPEG4- and DVD-players, and digital cameras). The battery equipped with the super power module mounts an EDLC to one side of the current limiter & voltage conversion circuit, such that a mobile-phone use time is increased by about 30%, a battery lifetime is also increased by 150% and greater. Also, the battery equipped with the super power module is simply comprised of a modulus circuit, such that it can be easily adapted to the conventional mobile- phone battery, resulting in the implementation of high compatibility and reduced production costs.
[43] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
[44]
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