KR100969589B1 - Battery module maintenance system for quick charging - Google Patents

Abstract

PURPOSE: A battery module management system for rapid charge is provided to extend the lifespan of a battery pack by uniformly maintaining the voltage of battery cells inside a battery pack. CONSTITUTION: A battery cell voltage detector(150) is connected to both ends of the battery cell in order to detect the voltage of the battery cell. An operation unit(140) changes the voltage of the battery cell to a digital value. A controller(120) generates a charge signal or discharge signal to perform the balancing between the battery cells. The battery cell charging unit charges the battery cell according to the charging signal of the controller. A discharging unit is connected to both ends of the battery cell to discharge the battery cell. A discharge controller controls the discharge of the battery cell according to the discharge signal of the controller.

Description

Battery module management system for quick charging {Battery module maintenance system for quick charging}

The present invention relates to a battery module management system, and more particularly, for rapid charging to equally adjust the voltage between battery cells by measuring the remaining capacity of each battery cell in the battery pack so that charging and discharging can be always performed in an equal state. A battery module management system.

Generally, a battery for driving a motor in an electric vehicle, a hybrid electric vehicle, an electric motorcycle (E-Scooter), or the like, generates tens of volts or hundreds of volts to generate a large amount of electric power of tens of kilowatts. A large capacity battery capable of outputting an amperage (A) is used. For this purpose, a single battery module is formed by connecting a single battery cell in series and / or in parallel. That is, by using a pack of multi-cells rather than a single cell, it is possible to apply a high voltage or increase capacity.

However, when a plurality of battery cells are connected and used as one battery module, the voltage difference between the cells is generated due to chemical differences, physical properties, and aging differences of the respective cells. At this time, if the battery cell is used as it is, the cell with low voltage becomes lower as time goes on, and eventually, the battery module or the entire battery pack needs to be replaced with a new one, thereby improving the overall battery life. There is a problem that is shortened to cause economic losses.

1 is a diagram illustrating output states according to a connection of a general plurality of batteries.

Specifically, a) of FIG. 1 illustrates a normal 2V 110EA battery, for example, 110 is connected and 220V is normally output, and b) of FIG. 1 illustrates that at least one battery is 0V. The total output voltage is exemplified as 0V, and FIG. 1C is a diagram illustrating that at least one or more batteries may be degraded, resulting in a decrease in overall performance or a risk of explosion.

In particular, as the number of charge / discharge cycles increases in each battery cell, the capacity deviation between the battery cells gradually increases, and as a result, as shown in FIG. Cells are generated, and a weak battery cell has a problem of weakening the performance of other battery cells as a whole.

As such, the voltage deviation between the battery cells in the battery pack may create unbalancing between the batteries, resulting in capacity loss of the battery pack. Accordingly, various battery balancing systems and methods have been developed for balancing individual batteries to prevent overcharging of all batteries and to charge them evenly.

Briefly explaining the balancing function, the battery management system detects the average voltage of a plurality of batteries, discharges the battery over the average voltage through the discharge resistor and charges the battery under the average voltage using an external power supply. . This balances the voltage or state of charge (SOC) of all batteries.

For example, there is a method of balancing the battery by flowing a current through a resistor or the like among battery cells in the battery pack having a high voltage. This method is simple, but when the number of unbalanced high voltage battery cells increases, the amount of discharge current increases and heat generation increases. In addition, this method has a problem that the balance of the battery of the lowest voltage among the plurality of batteries of the battery pack.

In addition, there is a method of balancing by flowing a charging current to a battery of a low voltage of a plurality of batteries of the battery pack. This method uses a DC-DC converter and is generally more efficient and generates less heat. However, this method also causes a situation that when the number of low voltage batteries increases, the voltage of the entire battery of the battery pack becomes lower than the original lowest voltage.

In addition, when detecting the voltage of the batteries in the battery pack, there is also a method for detecting the voltage regardless of whether or not the balance current is flowing to the battery. Such a voltage detection method has a problem in that a voltage drop due to a balance current occurs and a voltage cannot be detected accurately in a system that balances with a large current, or a system in which a balance current flows and a voltage detection path is shared.

For example, when a balance current flows through the battery, the terminal voltage of the battery is complicated by the change of the balance current. Therefore, when there is a battery in which balancing current flows, if a voltage is read out regardless of this balancing current, even if all the batteries are balanced, each battery is read at a different voltage value.

On the other hand, as a related technology, Korean Patent Application No. 2005-3852 (filed date: January 14, 2005) discloses the invention named "battery balancing device and method", such a battery balancing method, If voltages of a plurality of batteries are periodically detected and a predetermined number of batteries to be balanced exist, the battery with the highest voltage and the battery with the lowest voltage are selected and connected in parallel with each other, thus exceeding the average voltage value without a separate external power source. The battery of the highest voltage is discharged, and the battery of the lowest voltage that is less than the average voltage value is charged and balancing is completed.

According to Patent Application No. 2005-3852, in order to balance a plurality of batteries provided in an electric vehicle or a hybrid vehicle, it is possible to maintain the equilibrium of the plurality of batteries without a loss of external energy, or to an electric or hybrid vehicle. It is possible to minimize the heat generation of the battery management system provided in.

On the other hand, as a related technology, Korean Patent Application No. 2005-128935 (filed December 23, 2005) discloses the invention entitled "Voltage Balancing Control System and Method of Lithium Ion Battery". A voltage balancing control system for an ion battery includes a vertical interface for outputting an input of a read balance signal defining a voltage read period and a balance period and a read hold signal holding a battery voltage at the time of reading the voltage; An address clock for designating an address of a battery to be controlled; An interface for outputting an input of a balance hold signal for independently reading a battery voltage within a voltage balance period; And a controller of a battery balancing adjustment circuit connected to the vertical interface and the interface, and receiving a signal output from these interfaces to adjust the balancing of batteries.

According to Patent Application No. 2005-128935, a balance period and a voltage measurement period may be divided in a lithium ion battery battery to improve accuracy of voltage balancing.

In addition, there is a problem such as a sudden decrease in the life of the conventional charge and discharge system of the battery pack according to the prior art, and the inaccuracy of the battery-related gauges showing the battery voltage, current, remaining capacity, and the like. In addition, in the above-described balancing methods according to the related art, since the remaining capacity of each battery cell is not accurately measured and calculated, there is a problem that performance deterioration occurs during rapid charging.

The technical problem to be solved by the present invention for solving the above-mentioned problems is a fast charging battery module management system that can quickly switch from a precharge state to a fast charge state by performing a full charge after balancing between individual battery cells It is to provide.

Another technical problem to be achieved by the present invention is to develop a circuit that accurately measures the remaining capacity of battery cells in a battery pack, and to calculate the voltage difference between battery cells by measuring and calculating the remaining capacity of each battery cell. To provide a fast charging battery module management system that can be evenly matched.

As a means for achieving the above-described technical problem, the fast charging battery module management system according to the present invention, a plurality of battery packs (battery pack) each consisting of a plurality of individual battery cells (Battery Cell) connected in series or in parallel A battery module management system for managing charging and discharging of a battery module, the battery module management system comprising: a battery cell voltage detector connected to both ends of the plurality of battery cells to individually detect and detect voltages of the battery cells; A calculator for converting and calculating the voltage of the individual battery cells detected by the battery cell voltage detector into a digital value; A control unit which calculates respective voltage deviations by comparing the measured data of the individual battery cells calculated by the calculating unit and generates individual charging signals or individual discharge signals corresponding to the respective voltage deviations so as to perform balancing between the individual battery cells. ; A battery cell voltage charger configured to fully charge the battery cells or individually charge individual battery cells according to the generated individual charging signals of the controller; A discharge unit connected to both ends of the plurality of battery cells to discharge the battery cells individually; And a discharge control part controlling the discharge of the discharge part according to the individual discharge signal of the control part corresponding to the respective voltage deviations, wherein the control part precharges by performing a full charge after balancing the individual battery cells. It is characterized in that the rapid switching from the state to the rapid charge state.

Herein, the controller controls the individual battery cells to be discharged to balance the respective battery cells after full charge of each battery cell connected in series.

Here, the fast charging battery module management system according to the present invention, the battery cell voltage detection unit may further include a distribution resistor for respectively distributing the total voltage so as to detect each battery cell voltage individually from the battery cells connected in series. Can be.

Here, the battery cell voltage detector may include a multiplexer (MUX) for individually selecting the battery cells connected in series.

Here, the battery cell voltage charger may be switched to a field effect transistor (FET) driven at a TTL level so as to perform individual charging of the battery cells connected in series.

Here, the measured voltage of the battery cell voltage detector is set to a power supply voltage Vdd or less to measure the voltage of the battery cell in the A / D conversion operation range of the calculator.

Here, the discharge unit discharges the selected battery cell, and the on / off time is adjusted according to the capacity of the battery cell.

Here, the discharge unit is characterized in that the battery cells are connected in series, there is a voltage difference is transferred to a FET driven at the TTL level to select each individual discharge.

Here, the fast charging battery module management system according to the present invention may further include a battery-related gauge showing the voltage, the use current and the remaining capacity of each of the battery cells.

Here, the fast charging battery module management system according to the present invention may further include a serial communication unit (Universal Asynchronous Receiver / Transmitter: UART) so that the control unit and the external system serial communication.

According to the present invention, it is possible to quickly switch from the precharge state to the fast charge state by performing a full charge after balancing between individual battery cells.

According to the present invention, by accurately measuring the remaining capacity between each battery cell in the battery pack to equalize the voltage between the battery cells to be able to charge and discharge while maintaining a constant voltage and current of a constant capacity, thereby extending the life of the battery pack It is possible to improve the efficiency.

According to the present invention, the accuracy of the battery gauge can be improved, and the administrator can accurately estimate the driving distance by accurately determining the remaining capacity of the battery pack, thereby increasing the convenience of use and reducing the A / S cost.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

As an embodiment of the present invention, by performing a full charge after balancing between individual battery cells, it is possible to shorten the precharge time for at least two or more battery packs, and also to quickly switch from the precharge state to the fast charge state. There is provided a fast charging battery module management system.

2 is a block diagram of a fast charging battery module management system according to an embodiment of the present invention.

2, the fast charging battery module management system 100 according to an embodiment of the present invention in a series or parallel to a plurality of battery packs (battery pack) each consisting of a plurality of individual battery cells (Battery Cell) A battery module management system that manages the charging and discharging of the connected battery module 200, the operation switch 110, the control unit 120, the power supply unit 130, the operation unit 140, and the battery cell voltage measuring unit. 150, a distribution resistor 160, a discharge controller 170, a discharge unit 180, a serial communication unit (UART) 191, an LED display unit 192, and an alarm output unit 193. Here, the battery module 200 may include a plurality of battery packs connected to the load 300, and each battery pack may include a plurality of battery cells connected in series.

The battery cell voltage measuring unit 150 is connected to both ends of the plurality of battery cells, respectively, to individually detect and detect the voltage of the battery cells. In this case, the battery cell voltage detector 150 may be implemented as a multiplexer (MUX) for individually selecting the battery cells connected in series. The measured voltage of the battery cell voltage detector 150 may be set to a power supply voltage Vdd or less to measure the voltage of the battery cell in the A / D conversion operation range of the calculator 140.

The calculating unit 140 converts the voltages of the individual battery cells detected by the battery cell voltage detector 150 into digital values and calculates them.

The control unit 120 may be typically implemented as a microcomputer and receives a signal by the operation switch 110, and compares the measurement data of the individual battery cells calculated by the operation unit 140 to calculate respective voltage deviations. In order to perform the balancing between the individual battery cells, an individual charge signal or an individual discharge signal is generated in response to each of the voltage deviations. In addition, the controller 120 controls the individual battery cells to be discharged for the balance between the battery cells after the full charge of each battery cell connected in series.

The battery cell voltage charger (not shown) may charge the battery cells in full or individually charge the individual battery cells according to the generated individual charging signals of the controller 120. In this case, the battery cell voltage charger may be implemented in a similar circuit together with the battery cell voltage measurer 150, and the battery cell voltage charger is driven at a TTL level to perform individual charging of battery cells connected in series. It must be switched to a field effect transistor (FET).

The distribution resistor 160 divides the total voltage so that the battery cell voltage detector 150 separately detects each battery cell voltage from the battery cells connected in series.

The discharge unit 180 is connected to both ends of the plurality of battery cells, respectively, and serves to individually discharge the battery cells. Here, the discharge unit 180 discharges the selected battery cell, the on / off time is adjusted according to the capacity of the battery cell, the discharge unit 180 is the battery Since the cells are connected in series and there is a voltage difference, they can be switched to FETs driven at the TTL level to select each individual discharge.

The discharge controller 170 controls the discharge of the discharge unit 180 according to the individual discharge signal generated by the controller 120 corresponding to each voltage deviation.

The serial communication unit (Universal Asynchronous Receiver / Transmitter: UART) 191 is provided to enable serial communication between the control unit 120 and the external system, typically, the UART 191 is the control unit 120 It can be embedded in the microcomputer.

In addition, the fast charging battery module management system according to the present invention may further include a battery-related gauge (not shown) showing the voltage, the use current and the remaining capacity of each of the battery cells.

The LED display unit 192 may be used to indicate the state of the battery cell, such as charging and discharging, such as LED, the alarm output unit 193 is installed in preparation for the danger that may occur during the charge and discharge of the battery cell. It may be an alarm.

As a result, the fast charging battery module management system 100 according to an embodiment of the present invention measures the voltage and current of each battery cell through a battery remaining amount measurement circuit, compares measurement data with other battery cells, and generates It calculates the voltage deviation and charges or discharges as much as the calculated capacity to make the balance equal. Accordingly, the controller 120 can perform a full charge after balancing the individual battery cells, thereby quickly switching from the precharge state to the fast charge state.

3 is a diagram illustrating data communication of a fast charging battery module management system according to an embodiment of the present invention.

Referring to FIG. 3, in the fast charging battery module management system 100 according to an embodiment of the present invention, a plurality of battery packs 220a, 220b, and 220c including at least two battery cells 221b, 222b, and 223b are provided. As a system for managing the battery modules 200a, 200b and 200c connected in series or in parallel, the total output voltage becomes a combined voltage and a synthesized current of the battery modules 200a, 200b and 200c. At this time, the fast charging battery module management system 100 according to an embodiment of the present invention may be formed to enable wireless data communication, each battery module (200a, 200b, 200c) is pulse code modulation (PCM) ) May be configured to enable data communication, but is not limited thereto.

However, the charging and discharging of the battery modules 200a, 200b, and 200c configured in series (or in parallel) as shown in FIG. As shown in b), the voltage is not output from the entire battery due to the failure of the battery modules 200a, 200b, and 200c due to the prolongation of the voltage imbalance.

Accordingly, as shown in FIG. 3, the battery module 200a, 200b, 200c of the battery modules 200a, 200b, 200c is defective by controlling the charging and discharging for each battery module 200a, 200b, 200c. Even if it occurs, the defective battery modules 200a, 200b, and 200c may be immediately identified, thereby stably supplying power. In this case, the battery modules 200a, 200b, and 200c and the fast charging battery module management system 100 according to the embodiment of the present invention may be selectively connected by the switches 410, 420, and 430.

On the other hand, Figure 4 is a screen showing the measurement of the charging voltage of each battery module in the fast charging battery module management system according to an embodiment of the present invention, Figure 5 is a fast charging battery module according to an embodiment of the present invention This screen shows communication port connection and data reception in management system.

In the fast charging battery module management system according to an embodiment of the present invention, the screen 510 showing the measurement of the charging voltage of each battery module, as shown in Figure 4, each of the battery cells are all at 3.313V The same thing is shown.

In the quick charge battery module management system according to an embodiment of the present invention, the screen 520 showing communication port connection and data reception is a screen showing RS232C communication with the UART 191 shown in FIG. As shown, the data reception is terminated by confirming the data reception after the communication port is connected, and performing the disconnection after confirming the communication.

6 is a diagram illustrating a connection relationship between a master module and a slave module in the fast charging battery module management system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the fast charging battery module management system according to an embodiment of the present invention may be implemented as a master module 610 and slave modules 620 and 630. In this case, the master module 610 and the slave may be implemented. The modules 620 and 630 may be connected to the DC / DC converter 642 and the UARTs 641a, 641b, and 641c, respectively.

An external power flowing into the chargers 643a, 643b, and 643c and the power supply between the battery modules 200a, 200b, and 200c may be insulated to prevent a voltage collision. When charging, the slave modules 620 and 630 and the master module 610 is independently charged, and the results are transferred to the master module 610 only when fully charged, so that the master module 610 can grasp the complete charging. .

In addition, the master module 610 manages charging and discharging normally, and may collect data when the master module 610 is connected to a PC, which is an upper system.

7 is a diagram illustrating a multiplexer circuit in a fast charging battery module management system according to an embodiment of the present invention.

Referring to FIG. 7, the battery cell voltage detector 150 of the fast charging battery module management system according to an exemplary embodiment of the present invention may be a multiplexer (MUX) circuit, which may select one from a plurality of battery cells, specifically, a CMOS. It can be implemented as a multiplexer IC.

In this case, a multiplexer (MUX) circuit is connected to both ends of the plurality of battery cells, respectively, to separately detect and detect the voltage of the battery cells. That is, only one battery cell is separated from the battery cells connected in series in the battery module 200 to measure a voltage.

The measured voltage of the battery cell voltage detector 150 may be set to a power supply voltage Vdd or less to measure the voltage of the battery cell in the A / D conversion operation range of the calculator 140. In addition, the battery cell voltage detector 150 is a circuit in consideration of the internal resistance of the CMOS IC at the time of switching on. For example, the battery cell voltage detector 150 may be hybridized or implemented as an ASIC.

8 is a diagram illustrating a FET switch switching circuit in a fast charging battery module management system according to an embodiment of the present invention.

Referring to FIG. 8, the battery cell voltage charging unit 155 of the fast charging battery module management system according to an embodiment of the present invention is a FET switch switching circuit, and fully charges the battery cells or generates the control unit 120. The individual battery cells are individually charged according to the individual charging signals. In this case, the battery cell voltage charging unit 155 should be switched to a field effect transistor (FET) driven at a TTL level so as to perform individual charging of the battery cells connected in series to balance the battery cells.

The battery cell voltage charging unit 155 switches the electrode terminals by using FETs to individual battery cells to be charged, and is designed not to exceed a power supply voltage applied to the FETs, and may be hybridized, for example. Can be implemented with ASIC.

9 is a detailed balancing circuit diagram of a fast charging battery module management system according to an exemplary embodiment of the present invention, in which each battery cell is selected and discharged.

Charge and discharge are controlled for each battery cell in a series of battery packs connected in series, and FETs can be used to compensate for individual cell voltages. In addition, the resistor used at the time of discharge to correct the voltage between battery cells must be a watt resistance. At this time, since deterioration during continuous discharge is concerned, it is preferable to control by intermittent control for a predetermined period, for example, about 0.5 seconds.

On the other hand, with reference to Figures 10 to 13, the discharge and charging experiment of the fast charging battery module management system according to an embodiment of the present invention will be described.

FIG. 10 is a diagram illustrating an experiment of discharging and charging each individual cell in a fast charging battery module management system according to an embodiment of the present invention.

In the fast charging battery module management system according to the embodiment of the present invention, as shown in FIG. 10, the individual discharges after the full charge in the battery cells connected in series.

Specifically, the voltage of each battery cell is measured after the full charge to determine whether the voltage difference between the cells is equalized through the discharge of each battery cell. At this time, after applying the total voltage of 25.20V to the six battery cells, discharge the battery cells reaching the first 4.20V, and also discharges the next battery cells in turn to test whether the last cell is up to 4.20V, charging Check for overheating in over discharge and check for minimum control voltage of 50 kV.

Specifically, FIG. 10 is a photograph showing an experiment for discharging each cell and charging the whole, in which reference numeral 710 denotes six battery cells of 2000 mAh, and reference numeral 720 denotes selecting and discharging each battery cell. Reference numeral 730 denotes separate measurement of each battery cell voltage.

Therefore, based on the basic experiment, the battery is charged in series and charged in series, and while charging, the fully charged battery cell maintains the final voltage while performing individual discharge. At this time, the entire battery is maintained to be fully charged.

On the other hand, the battery cells are connected in series, there is a voltage difference. At this time, since a circuit is required to drive the CMOS IC at the TTL level in order to select each individual discharge, the circuits are constructed by combining the FETs.

In the fast charging battery module management system according to an embodiment of the present invention, only the selected battery is discharged, and the ON / OFF time must be adjusted according to the capacity of the battery cells. Problems may arise. Therefore, the discharge cycle is adjusted within 30% to 60%.

11A and 11B are views illustrating a discharge circuit and a battery protection fuse block configured on a test board in the fast charging battery module management system according to an embodiment of the present invention, and FIG. 12 is a quick view according to an embodiment of the present invention. A circuit diagram for performing individual discharge experiments in the rechargeable battery module management system.

FIG. 11A is a photograph illustrating a discharge circuit experiment configured on a test board in a fast charging battery module management system according to an exemplary embodiment of the present invention, and illustrates a FET circuit configuration for individual discharge, and includes a circuit as shown in FIG. 12. do.

Individual discharges are made by the FETs as indicated by reference A in FIG. 12. At this time, the selection of the battery cell can be configured to be controlled by the output terminal of the above-described control unit at the TTL level, and the experimental result is implemented so that the selected channel can be controlled by the control unit.

FIG. 11B is a view illustrating a fuse protection block for battery protection in a fast charging battery module management system according to an exemplary embodiment of the present invention, in which a voltage measurement wiring does not endure a sudden overload due to an overload caused by an abnormal circuit. Since there is a possibility, it shows that the protective fuse was attached to each cell terminal of a battery in order to prepare for the emergency.

13 is a circuit diagram for performing an individual voltage measurement experiment in a fast charging battery module management system according to an embodiment of the present invention.

Referring to FIG. 13, in the fast charging battery module management system according to an exemplary embodiment of the present invention, the battery cell voltage measuring unit 150 uses a measured voltage to measure a battery voltage in an operating range of an A / D converter. It should be made below the voltage. At this time, since the battery voltages connected in series are very high voltages, they must be distributed using a distribution resistor, and thus, each battery cell voltage can be detected separately from the batteries connected in series.

Specifically, the battery cell voltage measuring unit 150 according to the embodiment of the present invention is separated by using the comparator function of the OP-AMP, in this case, by applying the voltage of the battery connected in series to the +,-terminals of the differential amplifier Separate. In addition, the battery cell voltage measuring unit 150 according to the embodiment of the present invention measures each cell voltage alone based on the ground voltage GROUND, and the measured voltage value may be A / D calculated. .

As a result, the fast charging battery module management system according to the embodiment of the present invention continuously checks the state of charge, that is, the charge voltage and the charge current of each battery cell arranged in series in the battery pack, and achieves equal balancing. By performing a full charge in a short time by performing a fast charging of the battery module used in a hybrid device, for example, renewable energy such as wind, solar, hydropower or hybrid car, thereby improving the efficiency of the battery module Can be.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a diagram illustrating output states according to a connection of a general plurality of batteries.

2 is a block diagram of a fast charging battery module management system according to an embodiment of the present invention.

3 is a diagram illustrating data communication of a fast charging battery module management system according to an embodiment of the present invention.

4 is a screen illustrating measurement of charging voltages of respective battery modules in the fast charging battery module management system according to an exemplary embodiment of the present invention.

5 is a screen illustrating communication port connection and data reception in a fast charging battery module management system according to an embodiment of the present invention.

FIG. 6 is a diagram illustrating a connection relationship between a master module and slave modules in a fast charging battery module management system according to an exemplary embodiment of the present invention.

7 is a diagram illustrating a multiplexer circuit in a fast charging battery module management system according to an embodiment of the present invention.

8 is a diagram illustrating a FET switch switching circuit in a fast charging battery module management system according to an embodiment of the present invention.

9 is a detailed balancing circuit diagram of a fast charging battery module management system according to an embodiment of the present invention.

FIG. 10 is a diagram illustrating an experiment of discharging and charging each individual cell in a fast charging battery module management system according to an embodiment of the present invention.

11A and 11B are diagrams illustrating a discharge circuit and a battery protection fuse block configured in a test board in the fast charging battery module management system according to an embodiment of the present invention, respectively.

12 is a circuit diagram for performing an individual discharge experiment in the fast charging battery module management system according to an embodiment of the present invention.

13 is a circuit diagram for performing an individual voltage measurement experiment in a fast charging battery module management system according to an embodiment of the present invention.

<Brief Description of Drawings>

100: battery module management system

110: operation switch 120: control unit (microcomputer)

130: power supply unit 140: arithmetic unit

150: battery cell voltage detector

155: battery cell voltage correction unit

160: distribution resistance 170: discharge control unit

180: discharge unit 191: serial communication unit (UART)

192: LED display 193: alarm output unit

200, 200a, 200b, 200c: Battery module 300: Load

220a, 220b, 220c: Battery packs 221b, 223b, and 223b: battery cells

410, 420, 430: switch 610: master module

620, 630: slave module 641a, 641b, 641c: UART

642: DC / DC converters 643a, 643b, 643c: charger

Claims (10)

The voltage of the battery cell is connected to both ends of the plurality of battery cells of the battery module (Battery module) in which a plurality of battery packs each consisting of a plurality of individual battery cells (Battery Pack) connected in series or in parallel A battery cell voltage detector for individually selecting and detecting the battery cells; A calculator for converting and calculating the voltage of the individual battery cells detected by the battery cell voltage detector into a digital value; A control unit which calculates respective voltage deviations by comparing the measured data of the individual battery cells calculated by the calculating unit and generates individual charging signals or individual discharge signals corresponding to the respective voltage deviations so as to perform balancing between the individual battery cells. ; A battery cell voltage charger configured to fully charge the battery cells or individually charge individual battery cells according to the generated individual charging signals of the controller; A discharge unit connected to both ends of the plurality of battery cells to discharge the battery cells individually; And In the battery module management system comprising a discharge control unit for controlling the discharge of the discharge unit in accordance with the individual discharge signal of the control unit corresponding to the respective voltage deviation, to manage the charge and discharge, The control unit; After performing balancing between the individual battery cells through respective individual discharges of the individual battery cells, the entire plurality of individual battery cells are fully charged, thereby quickly switching from a precharge state to a fast charge state, and After the full charge of each battery cell connected to control the individual battery cells to discharge for balance between each battery cell, The quick charge battery module management system, Composed of one master module 610 and a plurality of slave modules (620, 630), The master module 610 and the plurality of slave modules 620 and 630 are connected to the DC / DC converter 642 and the UARTs 641a, 641b, and 641c, respectively, to the chargers 643a, 643b, and 643c. Incoming external power and power between the battery modules 200a, 200b, and 200c are insulated from each other to prevent voltage collision, and during charging, independently of the plurality of slave modules 620 and 630 and the master module 610 without distinction. Charging, and delivers the results to the master module (610) only when fully charged, so that the master module (610) to determine the complete charging, the fast charging battery module management system, characterized in that. delete The method of claim 1, Distribution resistors for distributing the total voltage to the battery cell voltage detector to detect each battery cell voltage individually from the battery cells connected in series Fast charging battery module management system further comprising. The method of claim 1, The battery cell voltage detector includes a multiplexer (MUX) for individually selecting a battery cell connected in series. The method of claim 1, The battery cell voltage charging unit is a fast charging battery module management system, characterized in that for switching to a field effect transistor (FET) which is driven at the transistor transistor logic (TTL) level to perform individual charging to the battery cells connected in series. The method of claim 1, The measured voltage of the battery cell voltage detector is set to a power supply voltage (Vdd) or less so as to measure the voltage of the battery cell in the A / D conversion operation range of the calculator. . The method of claim 1, The discharge unit discharges the selected battery cell, and the on / off time (On / Off Time) is adjusted according to the capacity of the battery cell characterized in that the fast charging battery module management system. The method of claim 1, The discharge unit is a fast charging battery module management system, characterized in that the battery cells are connected in series, so that the voltage difference is transferred to the FET driven at the TTL level to select each individual discharge. The method of claim 1, Battery-related gauges showing the voltage, current used and remaining capacity of each of the battery cells Fast charging battery module management system further comprising. The method of claim 1, And a serial communication unit (Universal Asynchronous Receiver / Transmitter: UART) for serial communication between the control unit and an external system.

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