KR100505484B1 - Battery information processing system in nothing-junction charging battery pack - Google Patents

Abstract

The present invention more specifically charges the battery built in the battery pack by a non-contact charging method, by allowing the battery pack itself to control a variety of information, such as the use time and the remaining use time of the battery to be transmitted to the portable mobile terminal, Prevents poor charging, shortened battery life, reduced system performance, malfunction of portable mobile terminals, and complete discharge of batteries, all of which are problems with contact charging. It is possible to prevent environmental pollution and national economic loss, and to allow the battery pack itself to control the charge and discharge according to the type of storage battery, to increase the life of the battery and to ensure the stability of performance. Mobile terminal combined with portable mobile terminal to power the built-in battery A battery pack having a transformer secondary side for supplying electric power from a charging device to a non-contact state and charging a storage battery, the battery pack comprising: a rectifier circuit for converting electric power supplied from the transformer secondary side into direct current; A charging circuit for supplying the converted power to the storage battery, a protection circuit for determining supply and interruption of power supplied to the storage battery from the charging circuit by checking the state of the storage battery, and measuring the voltage and current of the storage battery for use time. And a control circuit which provides information such as a charge capacity and accumulates the provided information to automatically correct a charge / discharge cycle.

Description

Battery information processing system in contactless charging battery pack {Battery information processing system in nothing-junction charging battery pack}

The present invention relates to a contactless rechargeable battery pack in which a battery information processing device is inserted, and more particularly, to charge a storage battery built in a battery pack by a contactless charging method, wherein the battery pack itself is the use time and remaining use of the battery. By controlling various information such as time and transmitting it to the portable mobile terminal, it is possible to prevent the problem of the contact charging method, the charging failure, the shortening of the battery life, the performance of the system, the malfunction of the portable mobile terminal, the complete discharge of the battery, and the like. A single charging device can charge multiple or multiple portable mobile terminals, thereby preventing environmental pollution and national economic losses, and allowing the battery pack itself to control charging and discharging according to the type of storage battery. It is to increase the lifespan and to ensure the stability of performance.

In general, as communication and information processing technologies are developed, the use of portable personal terminals such as mobile phones, camcorders, and laptops is gradually increasing, and new models of terminals having improved performances are continuously supplied with the development of technologies. It is becoming.

These portable mobile terminals are usually attached to a small battery pack inside or outside for easy portability, and a charging device for charging the battery of the battery pack is connected to a general use power source to supply a charging current to the battery pack of the portable mobile terminal. In order for the charging device to provide the charging current to the battery pack of the portable mobile terminal, the charging matrix constituting the charging device and the storage battery in the portable mobile device need to be electrically connected. In order to selectively connect according to the related art, a separate contact terminal is configured in the charging mother and the portable mobile device.

These, contact chargers have some problems to solve.

First, the problem of poor charging due to poor contact of the contact terminal and shortening the life of the battery should be solved.

Second, when the charging device or portable mobile terminal is exposed to moisture and dust, the performance of the system is degraded.

Third, a malfunction of the portable mobile terminal may occur due to static electricity generated when the charging contact terminal exposed to the outside comes into contact with the user's clothing, thereby reducing the reliability of the product.

Fourth, a short circuit may occur in the contact terminal due to carelessness of the user, and the battery may be completely discharged.

Fifth, since the conventional battery pack is configured to be charged only when the contact terminal provided on one side and the contact terminal of the charging device are in direct contact, only a charging device suitable for the battery pack of each terminal should be used.

Therefore, a user who purchases a new terminal should only use a charging device suitable for a battery pack, and a user who purchases a new terminal cannot use both the battery pack and the charging device of a previously used terminal. There is an economic burden because additional charging devices for the battery pack must be purchased, and most unused battery packs and charging devices are either thrown away or disposed of, causing serious environmental pollution and national economic losses.

In order to solve this problem, the non-contact charging method in which the rechargeable battery of the mobile mobile device is electrically contacted with the charging mother to charge the charging mother's energy is composed of the primary circuit of the transformer operating at high frequency in the charging mother and the secondary battery. By constructing the circuit on the battery side, i.e., in the mobile mobile device, the current of the charging matrix, i.e., energy, is provided to the battery of the mobile mobile device by magnetic coupling. Electric toothbrush, electric shaver).

By using the magnetic core as described above, Japanese Patent Application Laid-Open No. 2002-0035242 discloses a non-contact charging device for a battery for a portable mobile device by inductive coupling, which uses a magnetic core to wirelessly communicate between a battery pack and a charging device. The secondary side of the transformer made of a magnetic core should be mounted inside the portable mobile terminal, but the size of the magnetic core is very large, thereby increasing the size of the portable mobile terminal and causing limitations in shape. In addition, the mechanical strength of the application system may be reduced due to the weight of the magnetic core, and since a separate wireless communication device for transmitting the battery information to the control and protection circuit is provided, the radio frequency of the wireless communication device is a transformer. It affects the back and lowers the reliability of the portable mobile terminal. The key is a factor.

In order to solve the problems of the magnetic core as described above, Korean Patent Application Laid-Open Publication No. 2002-0057469 discloses a coreless ultra-thin printed circuit board transformer and a contactless battery charger using the printed circuit board transformer. The problem of the magnetic core was solved by using a transformer formed on a printed circuit board (PCB). However, since there is no protection circuit inside the battery pack, there is no means to prevent overcharging and overheating of the battery. In the case of Li-ion batteries, overdischarge is a factor in reducing the life of the batteries, and most other batteries have to be discharged at regular intervals. Because it provides only the discharged state, it cannot provide information such as the use time of the battery and the remaining use time. There was a problem that the life of the paper is drastically reduced.

Therefore, an object of the present invention is to solve the conventional problems as described above, and to charge the storage battery built in the battery pack in a contactless charging method, the battery pack itself is a variety of information such as the use time and the remaining use time of the battery The present invention provides a contactless rechargeable battery pack in which a battery information processing device for controlling and transmitting to a portable mobile terminal is inserted.

The present invention for achieving the above object is a rectifier circuit (4) connected to the transformer secondary side (T), which receives power from a charging device to a contactless state and converts into direct current, and the power converted by the rectifier circuit (4) The charging circuit 2 for supplying the storage battery B, the protection circuit 3 for checking the state of the storage battery B, and determining the supply and interruption of the electric power supplied from the charging circuit 2 and the storage battery ( Solid-state contact with a battery information processing device composed of a control circuit 1 configured to measure the voltage and current of B) to provide information such as a use time and a charge capacity, and to correct the charge / discharge capacity by accumulating the provided information. In the rechargeable battery pack, the control circuit (1) includes a mux (14) for inputting a voltage detected by the storage battery (B) and a measured temperature detected by the temperature sensor unit (15); An analog-to-digital converter 14 'for converting the output signal of the mux 14 into a digital signal; A compensator 12 'for compensating the voltage detected by the storage battery B; A data storage unit 16 which stores data such as a temperature compensation coefficient, a discharge rate compensation coefficient, a battery pack set value, a charging end taper current, and the like; A temporary storage unit 12 for receiving a signal output from the analog-to-digital converter 14 'and data stored in the data storage unit 16; A processing unit 11 which receives and analyzes the data received by the temporary storage unit 12, calculates data such as charge capacity, discharge time, and lifespan of the storage battery B and retransmits the data to the temporary storage unit 12; An input / output unit (17) for transmitting the data calculated by the processing unit (11) and transmitted to the temporary storage unit (12) to the outside; Generates a clock signal for determining data processing time, detection time of voltage or current, detection time of temperature, calculation data transmission time, and the like, to the processor 11, the compensator 12 'and the analog-to-digital converter 14'. A clock generator 13 for supplying; A temperature compensator (13 ') for compensating for the clock signal generated by the clock generator (13) to change with temperature; Characterized in that the bias supply unit 18 for supplying a bias which is an operating voltage to each module of the internal circuit.

In the following description of the preferred embodiments of the present invention in detail with reference to the accompanying drawings, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Do it.

1 is a block diagram of a contactless charging battery pack in which a battery information processing apparatus according to the present invention is inserted, and the high frequency electromotive force induced in the winding of the transformer secondary side T inserted in the battery pack is a short circuit of the rectifier circuit 4. It is converted into direct current by a key diode (Schottky Diode) and a supercapacitor and applied to the charging circuit 2 to charge the battery B. The charging circuit 2 includes an integrated power FET, a current detector, and a high precision current. A charge management block with a CC / CV charging function that provides a voltage controller, a charge state and a charge stop function is constructed. The transformer can be made thin and its size and shape can be modified to suit an application. It is desirable to use a material having low manufacturing cost and very high mechanical strength.

In order to determine the state of charge and discharge of the battery B, the voltage and current between the battery terminals BAT + and BAT- and the battery pack terminals PACK + and PACK- are monitored, and the state of the battery B is monitored. The control circuit 1 is configured with a fuel gauge control block for providing information to the portable mobile terminal, and a protection circuit 3 for preventing overcharging and overheating of the battery B is provided with the battery B. It is comprised between the charging circuits 2.

The protection circuit 3 includes a protection controller block, a switch function FET, a resistor, a capacitor, and the like, and detects the voltage of the battery B charged when the protection circuit 3 is overcharged. When exceeding the limited voltage (4.325V), the CO terminal voltage of the protection circuit 3 is outputted from high to low to cut off the charging current, and in the case of the over discharge protection operation, the voltage of the battery B is detected to detect the limited voltage ( When the voltage is lower than 2.4V), the DO terminal voltage of the protection circuit 3 is output from high to low to interrupt the discharge.

Here, the FET uses an ultra-thin SI6968EDQ, but is not limited thereto.

In the case of Li-ion batteries, the risk of leakage, heat generation, and explosion of the batteries during overcharging is prevented, and the charging efficiency and life cycle of the batteries are drastically reduced during overcharging, and external terminals or loaders ( It prevents the battery from being seriously damaged during the discharge of excessive current caused by the short circuit caused by the loader, and thus protects the battery from unexpected external environment to ensure the function and life of the battery and prevent the battery from explosion. To protect consumers.

In addition, the supercapacitor configured in the rectifier circuit 4 is an electric double layer capacitor, and has a high-speed charge / discharge and supercapacitance value, and uses a Schottky diode to convert the induced electromotive force into a low voltage DC voltage. By constructing a bridge and supercapacitors in parallel, the talk time of a mobile phone can be extended as compared with the case of using only conventional capacitors.

Here, the schottky diode uses DG1H3A, but is not limited thereto, and the structure of the rectifier circuit 4 is not limited to a specific one as long as it can achieve the purpose.

The charging circuit 2 is responsible for the charge management of the battery (B), the charge management block charges the battery (B) in three stages of the pre-charge section, the constant current section and the constant voltage section, the charging operation by the minimum current The terminal is terminated, and a charging timer (operation time control for each operation section according to the charging) is provided therein to provide safety for charging termination.

The charging of the battery B starts automatic charging when the voltage of the battery B falls below the lower limit, and automatically switches to the sleep mode when the power is not applied, thereby causing a problem due to overdischarge, for example, a lithium ion battery In case of (B), the reduction of the charging efficiency and the shortening of the life cycle due to the overdischarge are prevented.

In addition, by detecting the temperature of the battery pack to control the charging and discharging according to the temperature, it is possible to control the permission and prohibition for the charging processor, the permission and prohibition for the rapid charging and termination of charging.

At this time, the charging current of the storage battery (B) is

Iout = (Vset × Kset) / Rset

Where Iout is the charging current, Vset is the charging current setting voltage, and Kset is 315V-355V when Iout is 50mA ~ 1000mA.

STAT1 and STAT2 are ON and OFF respectively when charging, and OFF and ON respectively when charging ends.

The control circuit 1 provides information such as the use time and capacity of the battery B. The control circuit 1 is connected in series with the battery B to determine the state of charge and discharge of the battery B. By monitoring the voltage drop through RS), temperature compensation, self-discharge, and discharge rate of the battery B are applied to the charging counter to provide information such as discharge and charging time in minutes, and the capacity of the battery B is It is automatically corrected during the discharge cycle from full to empty.

In addition, by providing information such as discharge time, charge time, cell temperature, voltage, current, etc. in a one-wire bidirectional serial communication with a portable mobile terminal, the burden of communication caused by information transmission is reduced, and the power of the battery B is directly used. There is no need for a separate voltage regulator, and a high-precision voltage to frequency converter is used for charge and discharge counts.

FIG. 2 is an internal circuit diagram of a fuel gauge control block of a solid-state rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted. The analog data and temperature of the voltage VBAT detected in the battery B are shown in FIG. Analog data on the measured temperature detected by the sensor unit 15 is input to the MUX (Multiplexer) 14 and converted into digital data in the analog digital converter (ADC) 14 'and then temporarily stored. It is stored in the unit 12.

The temporary storage unit 12 may include compensation data (compensation data for system internal noise, etc.) input from the compensation unit 12 ′ and data stored in the data storage unit 16 (capacity efficiency for each battery pack, repetitive capacity, and current voltage). Conversion table, charge capacity update data, etc.) and the inputted data are transmitted to the processor 11, and the processor 11 analyzes the received data to calculate information such as charge capacity, discharge time, and lifespan of the battery B. Then through the temporary storage unit 12 and provided to the portable mobile terminal through the input and output unit 17.

In this case, the temporary storage unit 12 uses a random access memory (RAM) to modify the data, and the data stored in the data storage unit 16 is basic data so that it cannot be modified or deleted. EEPROM) is preferably used, but is not limited thereto.

The data stored in the data storage unit 16 stores data such as temperature compensation coefficient, discharge rate compensation coefficient, battery pack set value, charge end taper current, and the like.

The clock generator 13 generates a clock signal for determining the data processing time, the detection time of the voltage or current, the detection time of the temperature, the calculation data transfer time, and the like. The clock generator 13 is supplied to the unit 12 'and the analog-to-digital converter 14', and the clock generator 13 receives data from the temperature compensator 13 'for compensating for the clock signal to change with temperature.

The voltage input to the VCC is supplied to a bias supply unit 18 for supplying a bias, which is an operating voltage, to each module of the internal circuit.

3 is an information processing flowchart of a contactless rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted. The current of the battery B is measured (S101), and the average current is calculated every predetermined time (102). The voltage of (B) and the temperature inside the battery pack (or the temperature of the storage battery B) are measured (S103) (S104).

At this time, when the charging current I (CHG) is smaller than the discharge current I (DIS) (S105), since the storage battery B is in a discharged state, the self discharge amount of the storage battery B is calculated (S106). When the number of times of the calculation is greater than the update set time {t (S)} (S107), data to be transmitted to the portable mobile terminal is calculated (S110).

If the charging current I (CHG) is greater than the discharging current I (DIS) (S105), the storage battery B is in a charged state, and the remaining capacity of the storage battery B is calculated (S108) to fully charge the battery. After correcting the capacity (S109), the data to be transmitted to the portable mobile terminal is calculated (S110).

At this time, the data for the calculation of the data (S110) is the temperature compensation coefficients (Temperature Compensation Constants), the discharge rate compensation coefficients (Discharge Rate Compensation Constants) stored in the storage medium (EEPROM, etc.) Refer to the data table such as the charge termination taper current.

4 is a charging flowchart of a contactless rechargeable battery pack in which the battery information processing apparatus is inserted according to the present invention, and FIG. 5 is a charging graph of a contactless rechargeable battery pack in which the battery information processing apparatus according to the present invention is inserted. (VCC) and the measured voltage {VI (BAT)} are compared (S201), and when the measured voltage is greater than the reference voltage, it is in a charged state, and when the measured voltage is smaller than the reference voltage, it is in a discharged state.

If the measured voltage is smaller than the supply voltage, the measured voltage and the reference voltage {V (LOWV)} are compared (S202). If the measured voltage is smaller than the reference voltage, the preliminary charging timer {t (PRECHG) timer} In operation S211, the preliminary charging operation is performed (S212).

During the preliminary charging operation, the measured voltage and the reference voltage are continuously compared (S213), and when the measured voltage is less than the reference voltage, the preliminary charging operation is continued.

At this time, when the precharge time {t (PRECHG)} is completed, the precharge operation is stopped.

If the measured voltage is compared with the reference voltage (S202) (S213), and if the measured voltage is greater than the reference voltage, the charging timer {t (CHG) timer} is operated (S203) and the charging operation is performed (S204). .

If the charging time {t (CHG)} is completed while the charging operation is in progress, the charging operation is stopped, and if the charging time is not completed, the measured voltage and the reference voltage are continuously compared (S206), and if the measured voltage is the reference voltage If smaller, the preliminary charging operation and the charging operation are repeated.

Further, the charging operation continues until the detection of the taper current {I (TAPER)} (S207) or the taper time {t (TAPER)} is completed (S208), and when the charging operation is completed, the charging state is indicated (S209). ).

Here, the reference numeral CV shown in FIG. 5 is a constant voltage, CC is a constant current, RV is a regulation voltage, RI is a regulation current, and V (t ) Stands for VI (BAT).

FIG. 6 is an internal circuit diagram of a charging block of a contactless rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted. The comparison unit 22 compares the measured voltage with respect to the measured voltage. The result is RECHARGE. When (TAPER) (TERM) is transmitted to the control unit 21, the control unit 21 transmits the control signal according to the result to the input / output unit 25 and operates the switching unit 23 at the same time.

The signal for the charge / discharge state output to the input / output unit 25 may be used as a signal for controlling an external device, etc., and operate the light emitting diodes D1 and D2 to charge / discharge the current battery pack. Make sure you know the status.

The switching unit 23 is for selectively forming a charging / discharging loop, and a reverse blocking diode 24 is installed to prevent a current flowing in the switching unit 23 from flowing to the input terminal. .

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, by charging the battery built in the battery pack by a contactless charging method, the problem of the contact charging method, the charging failure, shortening the life of the battery, deteriorating the performance of the system, malfunction of the portable mobile terminal Prevents the complete discharge of the battery, and can charge multiple or multiple portable mobile terminals with a single charging device to prevent environmental pollution and national economic loss, the battery pack itself is the use time and remaining of the battery By controlling various types of information such as usage time and transmitting the same to the portable mobile terminal, and controlling charging and discharging according to the type of storage battery, there is an effect of increasing the life of the storage battery and ensuring stability of performance.

1 is a block diagram of a contactless rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted.

2 is an internal circuit diagram of a fuel gauge control block of a contactless rechargeable battery pack having a battery information processing apparatus according to the present invention inserted therein;

3 is an information processing flowchart of a contactless rechargeable battery pack having a battery information processing apparatus inserted therein.

4 is a charging flowchart of a contactless rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted.

5 is a charging graph of a contactless rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted;

6 is an internal circuit diagram of a charging block of a contactless rechargeable battery pack in which a battery information processing apparatus according to the present invention is inserted.

Explanation of symbols on main parts of drawing

B: Storage battery T: Transformer secondary side

RS: Current Sense Resistor

1: control circuit 2: charging circuit

3: protection circuit 4: rectification circuit

11 processing unit 12 temporary storage unit

13: clock generator 14: mux

15: temperature sensor 16: data storage

17: input and output unit 18: bias supply unit

Claims (3)

Rectification circuit 4 connected to the secondary side T of the transformer supplied with a contactless power from the charging device and converting into direct current, and charging for supplying the power converted by the rectifier circuit 4 to the storage battery B. The voltage and current of the protection circuit 3 and the storage battery B, which determine the supply and interruption of the power supplied from the charging circuit 2 by checking the state of the circuit 2 and the storage battery B, In a contactless rechargeable battery pack having a battery information processing device comprising a control circuit (1) for providing information such as the use time and the charge capacity, and accumulating the information provided to correct the charge and discharge capacity, The control circuit 1 includes a mux 14 to which a voltage detected by the storage battery B and a measured temperature detected by the temperature sensor unit 15 are input; An analog-to-digital converter 14 'for converting the output signal of the mux 14 into a digital signal; A compensator 12 'for compensating the voltage detected by the storage battery B; A data storage unit 16 which stores data such as a temperature compensation coefficient, a discharge rate compensation coefficient, a battery pack set value, a charging end taper current, and the like; A temporary storage unit 12 for receiving a signal output from the analog-to-digital converter 14 'and data stored in the data storage unit 16; A processing unit 11 which receives and analyzes the data received by the temporary storage unit 12, calculates data such as charge capacity, discharge time, and lifespan of the storage battery B and retransmits the data to the temporary storage unit 12; An input / output unit (17) for transmitting the data calculated by the processing unit (11) and transmitted to the temporary storage unit (12) to the outside; Generates a clock signal for determining data processing time, detection time of voltage or current, detection time of temperature, calculation data transmission time, and the like, to the processor 11, the compensator 12 'and the analog-to-digital converter 14'. A clock generator 13 for supplying; A temperature compensator (13 ') for compensating for the clock signal generated by the clock generator (13) to change with temperature; And a bias supply unit (18) for supplying a bias which is an operating voltage to each module of the internal circuit. delete The method of claim 1, The charging circuit 2 includes a comparator 22 which receives a charging voltage and outputs a signal for determining a charging / discharging operation by comparing with a reference voltage; A control unit 21 for receiving a control signal output from the comparing unit 22 and outputting a control signal according to a charging / discharging operation; A switching unit 23 for receiving a control signal from the control unit 21 and selectively forming a charge / discharge loop; An input / output unit 25 for receiving a control signal from the control unit 21 and indicating a charge / discharge state; The contactless charging battery pack is inserted into the battery information processing device, characterized in that consisting of a reverse current prevention diode (24) installed in the switching unit 23 to prevent current from flowing to the input terminal.