KR101619770B1 - Battery Management System - Google Patents

Abstract

Disclosed is a battery management system which is capable of preventing a negligent accident. The battery management system according to an embodiment of the present invention includes: a first battery cell balancing unit which performs battery cell balancing for two or more battery cells when voltage is applied to a load and a battery is charged or discharged; a second battery cell balancing unit which performs the battery cell balancing for two or more of the battery cells when the voltage is applied to the load and the battery is charged or discharged; an n-th battery cell balancing unit which performs the battery cell balancing for two or more of the battery cells when the voltage is applied to the load and the battery is charged or discharged; a first detecting unit which detects at least one among current charge current, current charge voltage, current discharge current, and current discharge voltage of each of two or more of the battery cells; a display unit which displays at least one among the current charge current, the current charge voltage, the current discharge current and the current discharge voltage which are detected; and a control unit which controls the first battery cell balancing unit, the second battery cell balancing unit, the n-th battery cell balancing unit, the first detecting unit and the display unit, or receives at least one among a first charge current signal for the current charge current, a first charge voltage signal for the current charge voltage, a first discharge current signal for the current discharge current and a first discharge voltage signal for the current discharge voltage.

Description

Battery Management System [0001]

The present invention relates to a battery management system.

Generally, Li-type batteries have unbalanced states due to a difference in voltage and current between battery cells as the use time passes due to differences in use environment and internal resistance.

When the unbalanced state of the battery continues, the capacity of the battery cell is changed due to the bad battery cells. If the battery pack is used until the voltage of the battery pack is lowered (LVC: Low Voltage Cutoff) And it was seriously exploded and exposed to the risk of safety accidents.

Therefore, in recent years, research on an improved battery management system that can prevent a safety accident by preventing the battery from being detonated by accurately and quickly determining the uniformity or non-uniformity of the battery cell has been continuously carried out.

In recent years, there has also been a demand for an improved battery pack that can accurately and quickly determine the uniformity or non-uniformity of battery cells to shorten the maintenance time during maintenance to reduce maintenance costs, Battery management systems have been continuously studied.

Registration number 10-1387658 Registration number 10-0878941 Public number 10-1992-0003676 Public number 10-1994-0003225

An embodiment of the present invention is to provide a battery management system capable of precisely and quickly judging the uniformity or non-uniformity of battery cells, thereby preventing a battery from being exploded and preventing a safety accident in advance .

In addition, since the embodiment of the present invention can accurately and quickly determine the uniformity or nonuniformity of the battery cells, the maintenance time can be shortened at the time of maintenance, the maintenance cost can be reduced, And to provide a battery management system capable of improving the production yield.

According to an aspect of the present invention, there is provided a battery management system comprising: a first battery cell balancing unit including at least two battery cells to perform battery cell balancing when supplying power to a load and charging or discharging the battery; A second battery cell balancing unit including at least two battery cells to perform battery cell balancing when supplying power to the load and charging or discharging the battery; An nth battery cell balancing unit that includes at least two battery cells to perform battery cell balancing when supplying power to the load and charging or discharging the battery; A first sensing unit for sensing at least one of a current charging current, a present charging voltage, a current discharging current and a current discharging voltage of the battery cell for each of at least two battery cells for each of at least two battery cells; A display unit for displaying at least one of a detected current charging current, a current charging voltage, a current discharge current, and a current discharge voltage; And controls the first battery cell balancing unit, the second battery cell balancing unit, the nth battery cell balancing unit, the first sensing unit, and the display unit, or controls the first charging current signal for the current charging current and the first And a control unit receiving at least one of a first discharging current signal for a charging voltage signal and a current discharging current and a first discharging voltage signal for a current discharging voltage.

In addition, the first battery cell balancing unit is electrically connected to the control unit, A first main DC / DC converter for converting the level to another DC power supply level; At least two battery cells which are electrically connected to the control unit and the first main DC / DC converter, and which receive input power from the input power supply means of the control unit and charge the battery cells; And discharging the current charge voltage to the first main DC / DC converter when the battery cell is electrically connected to the control unit, the battery cell and the first sensing unit and a battery cell having a current charge voltage higher than the reference charge voltage is generated for the battery cell, When a battery cell having a current charging voltage lower than the reference charging voltage is generated, the first main DC / DC converter receives a target charging voltage whose DC current level is adjusted and controls the DC power level so as to perform [balancing] At least two first sub DC / DC converters may be included.

Also, the first sub DC / DC converter includes a comparator in which a first input side is electrically connected to the battery cell, a second input side is electrically connected to the first sensing unit and the load, and an output side is electrically connected to the control unit; And a second input of the comparator and an output of the comparator, and at least one resistor electrically coupled to the first sensing unit and the load.

Further, the first sub DC / DC converter is electrically connected to the second input side of the comparator and at least one of the resistors, and accurately determines the charging time point or discharging time point as a reference for charging or discharging the present charging voltage for the battery cell And a zener diode that is provided so as to < / RTI >

The second battery cell balancing unit may include a second main DC / DC converter electrically connected to the control unit and converting the DC power level to another DC power level; At least two battery cells electrically connected to the control unit and the second main DC / DC converter, and charged with input power from the input power supply means of the control unit; And a second main DC / DC converter that is electrically connected to the control unit, the battery cell, and the first sensing unit and provides a current charging voltage to the second main DC / DC converter when a battery cell having a current charging voltage higher than the reference charging voltage is generated with respect to the battery cell, If a battery cell having a current charging voltage lower than the reference charging voltage is generated, the second main DC / DC converter receives the target charging voltage whose DC current level is adjusted by the second main DC / DC converter to adjust the DC power level to perform battery cell balancing. And a second sub DC / DC converter.

Also, the second sub DC / DC converter includes: a comparator having a first input side electrically connected to the battery cell, a second input side electrically coupled to the first sensing unit and the load, and an output side electrically connected to the control unit; And a second input of the comparator and an output of the comparator, and at least one resistor electrically coupled to the first sensing unit and the load.

Further, the second sub DC / DC converter is electrically connected to the second input side of the comparator and at least one of the resistors, and accurately determines the charging time point or the discharging time point as a reference for charging or discharging the present charging voltage for the battery cell And a zener diode that is provided so as to < / RTI >

Also, the nth battery cell balancing unit may include an nth main DC / DC converter electrically connected to the control unit and converting the DC power level to another DC power level; At least two battery cells electrically connected to the control unit and the nth main DC / DC converter, and charged with input power from the input power supply means of the control unit; And discharging the current charging voltage to the nth main DC / DC converter when the battery cell is electrically connected to the control unit, the battery cell and the first sensing unit and a battery cell having a current charging voltage higher than the reference charging voltage is generated for the battery cell, When a battery cell having a current charging voltage lower than a reference charging voltage is generated, a target charging voltage whose DC current level is adjusted by the n < th > main DC / DC converter is supplied to adjust the DC power level to perform battery cell balancing And an nth sub DC / DC converter.

The nth sub DC / DC converter includes: a comparator having a first input side electrically connected to the battery cell, a second input side electrically coupled to the first sensing unit and the load, and an output side electrically coupled to the control unit; And a second input of the comparator and an output of the comparator, and at least one resistor electrically coupled to the first sensing unit and the load.

Also, the nth sub DC / DC converter is electrically connected to the second input side of the comparator and at least one of the resistors, and accurately determines the charging time point or the discharging time point as a reference for charging or discharging the present charging voltage for the battery cell And a zener diode that is provided so as to < / RTI >

The battery management system according to the embodiment of the present invention can accurately and quickly determine the uniformity or non-uniformity of the battery cells, so that the battery can be prevented from being exploded, and safety accidents can be prevented in advance.

In addition, the battery management system according to the embodiment of the present invention can accurately and quickly determine the uniformity or non-uniformity of the battery cells, so that the maintenance time can be shortened during maintenance, The production time can be shortened during production, and the production yield can be improved.

1 is a circuit diagram showing a battery management system according to an embodiment of the present invention;
FIG. 2 is a circuit diagram illustrating a state in which the first sub DC / DC converter shown in FIG. 1 is connected to a battery cell, a first sensing unit, a load, a control unit, and a display unit;
3 is a circuit diagram showing another example of a state where the second sub DC / DC converter shown in FIG. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit.
4 is a circuit diagram showing another example of a state where the nth sub DC / DC converter shown in FIG. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit.
5 is a circuit diagram showing another example in which the first sub DC / DC converter shown in FIG. 1 is connected to a battery cell, a first sensing unit, a load, a control unit, and a display unit;
6 is a circuit diagram showing another example in which the second sub DC / DC converter shown in FIG. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit;
7 is a circuit diagram showing another example of a state where the nth sub DC / DC converter shown in FIG. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit.
FIG. 8 is a graph showing a state of charge and a state of discharge according to a comparison of the comparators shown in FIGS. 2 to 7; FIG.
9 is a flowchart illustrating a battery management method using a battery management system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

FIG. 1 is a circuit diagram illustrating a battery management system according to an embodiment of the present invention. FIG. 2 is a circuit diagram of a battery management system according to an embodiment of the present invention. Is a circuit diagram showing an example of the state.

FIG. 3 is a circuit diagram showing another example in which the second sub DC / DC converter shown in FIG. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit; DC converter is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit according to yet another embodiment of the present invention.

5 is a circuit diagram showing another example in which the first sub DC / DC converter shown in FIG. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit. FIG. DC-DC converter is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit according to another embodiment of the present invention.

7 is a circuit diagram showing another example of a state where the nth sub DC / DC converter shown in Fig. 1 is connected to the battery cell, the first sensing unit, the load, the control unit, and the display unit. Fig. 2 is a graph showing a charging state and a discharging state according to a comparison of the comparator shown in FIG.

1 to 8, a battery management system 100 according to an embodiment of the present invention includes a first battery cell balancing unit 102, a second battery cell balancing unit 104, A first sensing unit 108, a display unit 110, and a control unit 112. The first sensing unit 108,

The first battery cell balancing unit 102 includes at least two battery cells B_A1 to B_An to perform battery cell balancing when supplying power to the load 101 and charging or discharging the battery.

At this time, the first battery cell balancing unit 102 includes a first main DC / DC converter DCC A, at least two battery cells B_A1 through B_An, and at least two first sub DC / DC converters DCC A- , DCC A-2, DCCAN).

Here, as shown in FIG. 2, the first battery cell balancing unit 102 may calculate the total current by performing a correlation like Equation (1) when performing battery cell balancing.

<Formula>

는 총전류이고,

는 충전기에서의 충전전류이며,

은 DCC A-n으로부터 출력되는 현재 조절 전류임.At this time,

Is the total current,

Is the charging current in the charger,

Is the current regulated current output from the DCC An.

The first main DC / DC converter DCC A is electrically connected to the control unit 112 to be described later, and converts the DC power supply level to another DC power supply level.

At this time, the A400 of the control unit 112 can control the on / off operation of the first main DC / DC converter DCC A.

At least two battery cells B_A1 to B_An are electrically connected to the control unit 112 and the first main DC / DC converter DCC A to be described later, and the input power supply means of the control unit 112 (A100, A100-1, A100-2, A100-n).

At this time, the input power supply means A100, A100-1, A100-2, and A100-n of the control unit 112 are connected to a charging signal (not shown) corresponding to the DC current signal converted from the AC / To the at least two battery cells B_A1 to B_An.

At least two first sub DC / DC converters (DCC A-1, DCC A-2, DCC An) are connected to the control unit 112, at least two battery cells B_A1 to B_An, 1 sensing unit 108 and battery cells B_A1 to B_An having a current charging voltage higher than the reference charging voltage for at least two battery cells B_A1 to B_An are generated, DC / DC converter DCC A, and if the battery cells B_A1 to B_An having a current charging voltage lower than the reference charging voltage are generated, the first main DC / DC converter DCC A causes the DC current level And adjusts the DC power level so as to perform battery cell balancing by receiving the adjusted target charging voltage.

Here, A200-1 and A200-2 and A200-n of the control unit 112 control on / off operations of at least two first sub DC / DC converters DCC A-1, DCC A-2, and DCC An I can do it.

As shown in FIGS. 2 and 5, the first DC / DC converter DCC A-1 may include a comparator OP-AMP and at least one resistor R 1 and R 2.

The comparator OP-AMP includes a first sensing unit C / S A-1 to be described later and a second sensing unit C / S A-1 to which the first input side + is electrically connected to the battery cell B_A1, And the output side may be electrically connected to the control unit 112 to be described later.

For example, as shown in FIG. 2, the comparator OP-AMP has a first input side (+) electrically connected to the battery cell (B_A1), a second input side (- (C / S A-1) and the load 101, and the output side may be electrically connected to the control unit 112 to be described later.

5, the comparator OP-AMP has a first input side (+) electrically connected to the battery cell B_An and a first sensing unit (C / Sen), and a second input side (-) is electrically connected to the first sensing unit (C / S an) and the load 101 to be described later, and the output side can be electrically connected to the control unit 112 to be described later.

As shown in FIGS. 1, 2, 5, and 8, the comparator OP-AMP includes a comparator OP-AMP for comparing at least two battery cells B_A1 to B_An with a current charging voltage higher than a reference charging voltage Vcp, When the cells B_A1 to B_An are generated, the current charging voltage can be discharged (A) to provide the first main DC / DC converter DCC A.

On the other hand, when the battery cells B_A1 to B_An in which the present charging voltage is lower than the reference charging voltage Vcp are generated, the comparator OP-AMP outputs the direct current level by the first main DC / DC converter DCC A And the adjusted target charging voltage can be supplied and charged (B).

At least one of the resistors R1 and R2 is connected to the second input side of the comparator OP-AMP and the output side of the comparator OP-AMP and the first sensing unit C / / S an) and the load 101, respectively.

When at least one of the resistors R1 and R2 generates the battery cells B_A1 to B_An whose current charging voltage is lower than the reference charging voltage Vcp, the first main DC / DC converter DCC A supplies the direct current The DC current level can be adjusted so as to perform battery cell balancing by receiving the target charging voltage whose level is adjusted.

At this time, at least one of the resistors R1 and R2 may be provided in two or more, and may be provided in at least one of parallel connection and serial connection.

In addition, as shown in FIG. 5, the first sub DC / DC converter DCC A-n may further include a Zener diode ZD.

At this time, the Zener diode ZD is electrically connected to the second input side (-) of the comparator OP-AMP and at least one of the resistors R1 and R2, and the current charging voltage for the battery cell B_An is charged or It can be provided to accurately determine the charging time point or the discharging time point as a reference for discharging.

Here, the Zener diode ZD may be provided to accurately determine the charging time point or the discharging time point for the battery cells B_A1 and B_A2, though it is not shown for convenience of explanation.

At this time, the control unit 112 may include an A / D converter 112a and a controller 112b.

The A / D converter 112a converts the analog signal of the target charging voltage whose DC current level is output from the comparator OP-AMP into a digital signal, and the controller 112b converts the analog signal of the target charging voltage into a digital signal To the display unit 110.

The circuit connection structure of the first sub DC / DC converter (DCC A-2, DCC An in FIG. 1) is not limited to the circuit of the first sub DC / DC converter (DCC A- It can be provided with the same rules as the connection structure.

Although the circuit connection structure of the first sub DC / DC converter (DCC A-1 and DCC A-2 in FIG. 1) is not shown for the sake of convenience, the circuit of the first sub DC / It can be provided with the same rules as the connection structure.

The second battery cell balancing unit 104 includes at least two battery cells B_B1 to B_Bn to perform battery cell balancing when supplying power to the load 101 and charging or discharging the battery.

At this time, the second battery cell balancing unit 104 includes a second main DC / DC converter DCC B, at least two battery cells B_B 1 to B_Bn and at least two second sub DC / DC converters DCC B-1 , DCC B-2, DCC Bn).

The second main DC / DC converter DCC B is electrically connected to the control unit 112 to be described later, and converts the DC power supply level to another DC power supply level.

At this time, the B 400 of the control unit 112 can control the ON / OFF operation of the second main DC / DC converter DCC B.

At least two battery cells B_B1 to B_Bn are electrically connected to the control unit 112 and the second main DC / DC converter DCC B to be described later, and the input power supply means of the control unit 112 (B100, B100-1, B100-2, B100-n).

At this time, the input power supply means B100, B100-1, B100-2, and B100-n of the control unit 112 are connected to a charging signal (not shown) corresponding to the DC current signal converted from the AC / To at least two battery cells B_B1 to B_Bn.

At least two second sub DC / DC converters DCC B-1, DCC B-2 and DCC Bn are connected to the control unit 112 to be described later, at least two battery cells B_B 1 to B_Bn, 1 sensing unit 108 and when battery cells B_B1 to B_Bn having a current charging voltage higher than a reference charging voltage are generated for at least two battery cells B_B1 to B_Bn, DC-DC converter DCC B, and if battery cells B_B 1 to B_Bn having a current charging voltage lower than the reference charging voltage are generated, the second main DC / DC converter DCC B supplies the DC current level to the DC / And adjusts the DC power level so as to perform battery cell balancing by receiving the adjusted target charging voltage.

Here, B200-1 and B200-2 and B200-n of the control unit 112 control ON / OFF operations of at least two second sub DC / DC converters DCC B-1, DCC B-2, and DCC Bn I can do it.

3 and FIG. 6, the second DC / DC converter DCC B-1 may include a comparator OP-AMP and at least one resistor R 1 and R 2.

The comparator OP-AMP includes a first sensing unit C / S B-1 to be described later and a second sensing unit C / S B-1 to which the first input side + is electrically connected to the battery cell B_B1, And the output side may be electrically connected to the control unit 112 to be described later.

For example, as shown in FIG. 3, the comparator OP-AMP has a first input side (+) electrically connected to the battery cell (B_B1) and a second input side (- (C / S B-1) and the load 101, and the output side may be electrically connected to the control unit 112 to be described later.

6, the comparator OP-AMP has a first input side (+) electrically connected to the battery cell B_Bn and the first sensing unit (C / S Bn), and a second input side (-) is electrically connected to the first sensing unit (C / S Bn) and the load 101 to be described later, and the output side can be electrically connected to the control unit 112 to be described later.

As shown in FIGS. 1, 3, 6 and 8, the comparator OP-AMP includes a comparator OP-AMP for comparing at least two battery cells B_B1 to B_Bn with a current charging voltage higher than a reference charging voltage Vcp, When the cells B_B1 to B_Bn are generated, the current charging voltage can be discharged (A) to provide the second main DC / DC converter DCC B.

On the other hand, when the battery cells B_B1 to B_Bn in which the present charging voltage is lower than the reference charging voltage Vcp are generated, the comparator OP-AMP outputs the direct current level by the second main DC / DC converter DCC B And the adjusted target charging voltage can be supplied and charged (B).

At least one of the resistors R1 and R2 is connected to the second input side of the comparator OP-AMP and the output side of the comparator OP-AMP and the first sensing units C / S B-1 and C / / S Bn and the load 101, respectively.

When at least one of the resistors R1 and R2 generates the battery cells B_B1 to B_Bn in which the present charge voltage is lower than the reference charge voltage Vcp, the second main DC / DC converter DCC B converts the direct current The DC current level can be adjusted so as to perform battery cell balancing by receiving the target charging voltage whose level is adjusted.

At this time, at least one of the resistors R1 and R2 may be provided in two or more, and may be provided in at least one of parallel connection and serial connection.

In addition, as shown in FIG. 6, the second sub DC / DC converter DCC B-n may further include a Zener diode ZD.

At this time, the Zener diode ZD is electrically connected to the second input side (-) of the comparator OP-AMP and at least one of the resistors R1 and R2, and the current charging voltage for the battery cell B_Bn is charged or It can be provided to accurately determine the charging time point or the discharging time point as a reference for discharging.

Here, the Zener diode ZD may be provided to accurately determine the charging time point or the discharging time point for the battery cells B_B1 and B_B2, though it is not shown for convenience of explanation.

At this time, the control unit 112 may include an A / D converter 112a and a controller 112b.

The A / D converter 112a converts the analog signal of the target charging voltage whose DC current level is output from the comparator OP-AMP into a digital signal, and the controller 112b converts the analog signal of the target charging voltage into a digital signal To the display unit 110.

On the other hand, although the circuit connection structure of the second sub DC / DC converter (DCC B-2, DCC Bn in FIG. 1) is not shown for the sake of explanation, the circuit of the second sub DC / DC converter (DCC B- It can be provided with the same rules as the connection structure.

The circuit connection structure of the second sub DC / DC converter (DCC B-1, DCC B-2 in FIG. 1) is not shown for the sake of convenience of explanation, but the circuit of the second sub DC / It can be provided with the same rules as the connection structure.

The nth battery cell balancing unit 106 includes at least two battery cells B_n1 to B_nn to perform battery cell balancing when supplying power to the load 101 and charging or discharging the battery.

At this time, the nth battery cell balancing unit 106 includes an nth main DC / DC converter DCCn, at least two battery cells B_n1 through B_nn, and at least two nth sub DC / DC converters DCC n-1 , DCC n-2, DCC nn).

The nth main DC / DC converter DCC n is electrically connected to the control unit 112 to be described later, and converts the DC power supply level to another DC power supply level.

At this time, n400 of the control unit 112 can control the on / off operation of the nth main DC / DC converter DCC n.

At least two battery cells B_n1 to B_nn are electrically connected to the control unit 112 and the nth main DC / DC converter DCC n to be described later, and are connected to input power supply means (n100, n100-1, n100-2, n100-n).

The input power supply means n100, n100-1, n100-2, and n100-n of the control unit 112 are connected to a charge signal (not shown) corresponding to the DC current signal converted from the AC / To at least two battery cells B_n1 to B_nn.

At least two nth sub DC / DC converters DCC n-1, DCC n-2 and DCC nn are connected to the control unit 112 to be described later, at least two battery cells B_n 1 to B_nn, 1 sensing unit 108 and the battery cells B_n1 to B_nn having a current charging voltage higher than the reference charging voltage for at least two battery cells B_n1 to B_nn are generated, DC-DC converter DCC n, and when the battery cells B_n 1 to B_nn having a current charging voltage lower than the reference charging voltage are generated, the DC current level is set by the nth main DC / DC converter DCC n And adjusts the DC power level so as to perform battery cell balancing by receiving the adjusted target charging voltage.

Herein, n200-1, n200-2 and n200-n of the control unit 112 control on / off operations of at least two nth sub DC / DC converters DCC n-1, DCC n-2 and DCC nn I can do it.

As shown in FIGS. 4 and 7, the nth sub DC / DC converter DCC n-1 may include a comparator OP-AMP and at least one resistor R 1 and R 2.

The comparator OP-AMP includes a first sensing unit C / S n-1 and a second sensing unit C / S n-1 to be described later, the first input side (+) being electrically connected to the battery cell B_n1, And the output side may be electrically connected to the control unit 112 to be described later.

For example, as shown in FIG. 4, the comparator OP-AMP has a first input side (+) electrically connected to the battery cell (B_n1) and a second input side (- (C / S n-1) and the load 101, and the output side may be electrically connected to the control unit 112 to be described later.

7, the comparator OP-AMP has a first input side (+) electrically connected to the battery cell B_nn and the first sensing unit C / S nn, and a second input side (-) may be electrically connected to the first sensing unit (C / S nn) and the load 101 to be described later, and the output side may be electrically connected to the control unit 112 to be described later.

1, 4, 7 and 8, the comparator OP-AMP includes a comparator OP-AMP for comparing at least two battery cells B_n1 to B_nn with a current charging voltage higher than the reference charging voltage Vcp, When cells B_n1 to B_nn are generated, it is possible to discharge (A) the current charging voltage to provide to the nth main DC / DC converter DCC n.

On the other hand, when the battery cells B_n1 to B_nn in which the present charging voltage is lower than the reference charging voltage Vcp are generated, the comparator OP-AMP outputs the direct current level by the nth main DC / DC converter DCCn And the adjusted target charging voltage can be supplied and charged (B).

At least one resistor R1 and R2 is connected to the second input side of the comparator OP-AMP and the output side of the comparator OP-AMP and the first sensing unit C / / S nn and the load 101, respectively.

When at least one of the resistors R1 and R2 generates the battery cells B_n1 to B_nn in which the present charging voltage is lower than the reference charging voltage Vcp, the DC current The DC current level can be adjusted so as to perform battery cell balancing by receiving the target charging voltage whose level is adjusted.

At this time, at least one of the resistors R1 and R2 may be provided in two or more, and may be provided in at least one of parallel connection and serial connection.

Also, as shown in FIG. 7, the nth sub DC / DC converter DCC n-n may further include a zener diode ZD.

At this time, the Zener diode ZD is electrically connected to the second input side (-) of the comparator OP-AMP and at least one of the resistors R1 and R2, and the current charging voltage for the battery cell B_nn is charged or It can be provided to accurately determine the charging time point or the discharging time point as a reference for discharging.

Here, the Zener diode ZD may be provided to accurately determine the charging time point or the discharging time point for the battery cells B_n1 and B_n2, though it is not shown for convenience of explanation.

At this time, the control unit 112 may include an A / D converter 112a and a controller 112b.

The A / D converter 112a converts the analog signal of the target charging voltage whose DC current level is output from the comparator OP-AMP into a digital signal, and the controller 112b converts the analog signal of the target charging voltage into a digital signal To the display unit 110.

On the other hand, the circuit connection structure of the nth sub DC / DC converter (DCC n-2, DCC nn in FIG. 1) It can be provided with the same rules as the connection structure.

The circuit connection structure of the nth sub DC / DC converter (DCC n-1 and DCC n-2 in FIG. 1) is not limited to the circuit of the nth sub DC / DC converter (DCC nn in FIG. 7) It can be provided with the same rules as the connection structure.

The first sensing unit 108 is connected to the battery cells B_A1 to B_An for the battery cells B_A1 to B_An, B_B1 to B_Bn and B_n1 to B_nn for at least two battery cells B_A1 to B_An, B_B1 to B_Bn and B_n1 to B_nn, , B_B1 to B_Bn, B_n1 to B_nn), the present charge voltage, the current discharge current, and the current discharge voltage.

Here, the display unit 110 displays at least one of the current charging current detected by the first sensing unit 108, the current charging voltage, the current discharging current, and the current discharging voltage.

At this time, A300-1, A300-2 and A300-n, B300-1, B300-2 and B300-n, n300-1 and n300-2 and n300-n of the control unit 112 are connected to the first sensing unit C / A first charge current signal for the current charge current sensed by the first charge current sensor S-1 to C / S An, C / S B-1 to C / S Bn, C / S n- The first discharge voltage signal for the current discharge current, the first discharge current signal for the current discharge current, and the first discharge voltage signal for the present discharge voltage, and transmit the first discharge current signal to the display unit 110.

Also, the first sensing units C / S A-1 through C / An are electrically connected to the control unit 112 and the first sub DC / DC converters DCC A-1 through DCC An to be described later , At least one of the current adjustment current and the current adjustment voltage, which are output from the first sub DC / DC converters (DCC A-1 to DCC An) and whose current DC current level is adjusted, can be further sensed.

Here, the display unit 110 may display at least one of the current adjustment current and the current adjustment voltage sensed by the first sensing units C / S A-1 to C / S A-n.

At this time, A300-1, A300-2, and A300-n of the controller 112 receive the current adjustment current signal for the current adjustment current sensed by the first sensing units C / S A-1 to C / At least one of the current adjustment voltage signals for the adjustment voltage may be supplied to the display unit 110.

Also, the first sensing units C / S B-1 to C / S Bn are electrically connected to the control unit 112 and the second sub DC / DC converters DCC B-1 to DCC Bn to be described later And at least one of the current regulated current and the current regulated voltage, which are output from the second sub DC / DC converters DCC B-1 to DCC Bn, the current DC current level of which is adjusted.

Here, the display unit 110 may display at least one of the current adjustment current and the current adjustment voltage sensed by the first sensing units C / S B-1 to C / S B-n.

At this time, B300-1, B300-2, and B300-n of the control unit 112 compare the current adjustment current signal for the current adjustment current sensed by the first sensing units C / S B-1 to C / At least one of the current adjustment voltage signals for the adjustment voltage may be supplied to the display unit 110.

Also, the first sensing units C / S n-1 to C / S nn are electrically connected to the control unit 112 and the nth sub DC / DC converters DCC n-1 to DCC nn to be described later , At least one of the current regulated current and the current regulated current whose current DC current level is output from the nth sub DC / DC converters DCC n-1 to DCC nn can be further sensed.

Here, the display unit 110 may display at least one of the current adjustment current and the current adjustment voltage sensed by the first sensing units C / S n-1 to C / S n-n.

At this time, n300-1, n300-2, and n300-n of the controller 112 are set to the current control current signal for the current control current sensed by the first sensing units C / S n-1 to C / At least one of the current adjustment voltage signals for the adjustment voltage may be supplied to the display unit 110.

Here, although not shown, the first sensing unit 108 may include at least one of a current sensing sensor (not shown), a voltage sensing sensor (not shown), and a hall sensor (not shown).

At this time, the display unit 110 may include at least one of a PDP module (not shown), an LCD module (not shown), an LED module (not shown), an OLED module (not shown), and a 7-segment module Can be.

The control unit 112 controls the first battery cell balancing unit 102, the second battery cell balancing unit 104 and the nth battery cell balancing unit 106, the first sensing unit 108 and the display unit 110 A first charging current signal for the current charging current sensed by the first sensing unit 108, a first charging current signal for the current charging voltage, a first discharging current signal for the current discharging current, 1 &lt; / RTI &gt; discharge voltage signal.

Here, A500 and A600 of the control unit 112 are respectively connected to the (-) terminal and the (+) terminal, and the first battery cell balancing unit 102, the second battery cell balancing unit 104 and the nth battery cell balancing unit 106 to charge the battery cell balancing charge current signal and a load operation power supply signal for charging the load 101 to the load 101. [

At this time, A700 and A800 of the load 101 may be (-) terminal and (+) terminal, respectively.

The battery management system 100 according to an embodiment of the present invention may further include a second sensing unit 114, a controller 112, and a display unit 110.

The second sensing unit 114 is connected to the first battery cell balancing unit 102 and the second battery cell balancing unit 104 and the nth battery cell balancing unit 106, At least one of the current charging current, the current charging voltage, the current discharging current, and the current discharging voltage of each of the battery cells A1 to B-An, B-B1 to B-Bn, B-n1 to B- I can detect it.

Here, the controller 112 compares the second charging current signal for the current charging current of all the battery cells (B-A1 to B-An, B-B1 to B-Bn, B- A second discharge current signal for the current discharge current of all the battery cells (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-nn) At least one of the second discharge voltage signals with respect to the voltage may be further supplied.

At this time, the display unit 110 displays the current charging current of all the battery cells (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B- B-N1 to B-nn of all the battery cells B-A1 to B-An, B-B1 to B-Bn, (B-A1 to B-An, B-B1 to B-Bn) for the current discharge current and the second discharge voltage signal of the battery cells A1 to B-An, B-B1 to B- B-Bn, B-n1 to B-nn) according to the control of the control unit 112. [

Here, although not shown, the second sensing unit 114 may include at least one of a current sensing sensor (not shown), a voltage sensing sensor (not shown), and a hall sensor (not shown).

At this time, the display unit 110 may include at least one of a PDP module (not shown), an LCD module (not shown), an LED module (not shown), an OLED module (not shown), and a 7-segment module Can be.

The battery management system 100 according to an embodiment of the present invention may further include a third sensing unit 116, a controller 112, and a display unit 110.

The third sensing unit 116 includes an operation 116a (C / S LA) for sensing at least one of the total amount of current of the load 101 and the total amount of voltage, and the operation of the first battery cell balancing unit 102 and the second battery cell B-B1 to B-Bn, B-n1 to B-nn for the balancing unit 104 and the n-th battery cell balancing unit 106, And an operation (116b, C / ST) for detecting at least one of the amount of voltage and the amount of voltage can be performed under the control of the control unit 112. [

Here, the controller 112 compares the first total current amount signal with the total amount of current of the load 101, the first total amount amount signal with respect to the total amount of voltage of the load 101, B-B1 to B-Bn, B-B1 to B-Bn, B-n1 to B-nn, and the second total current amount signal for all of the battery cells B- n1 to B-nn) of the second total voltage amount signal.

At this time, the display unit 110 displays the total amount of current of the load 101 to the first total amount of current signal, the total amount of the load 101 to the first total amount of voltage signal, B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-nn, and the second total voltage amount signal, B1 to B-Bn, and B-n1 to B-nn) according to the control of the control unit 112. [

Here, although not shown, the third sensing unit 116 may include at least one of a current sensing sensor (not shown), a voltage sensing sensor (not shown), and a hall sensor (not shown).

At this time, the display unit 110 may include at least one of a PDP module (not shown), an LCD module (not shown), an LED module (not shown), an OLED module (not shown), and a 7-segment module Can be.

A battery management method for managing a battery using the battery management system 100 according to an embodiment of the present invention will be described with reference to FIG.

9 is a flowchart illustrating a battery management method using a battery management system according to an embodiment of the present invention.

9, a battery management method 900 using a battery management system 100 according to an embodiment of the present invention includes battery cells B-A1 to B-An, B-B1 to B-Bn, and B- charging of the battery cells B-A1 to B-An, B-B1 to B-Bn, and B-n1 to B-nn is started at a constant voltage or a constant current (S904).

Thereafter, the battery management method 900 using the battery management system 100 according to the embodiment of the present invention determines the battery cells (B-A1 to B-An, B-B1 to B-Bn, To (B-nn), a present charge voltage, a present discharge current, and a current discharge voltage (S906).

Thereafter, the battery management method 900 using the battery management system 100 according to the embodiment of the present invention determines the battery cells (B-A1 to B-An, B-B1 to B-Bn, To B-nn) is a reference charging voltage (S908).

Here, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention includes the steps of measuring battery cells B-A1 to B-An, B-B1 to B-Bn, B-nn) is a reference charging voltage, it is determined whether the current charging current is a reference charging current (S910).

Thereafter, the battery management method 900 using the battery management system 100 according to the embodiment of the present invention determines the battery cells (B-A1 to B-An, B-B1 to B-Bn, (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-nn) if the current charging current for each of the battery cells B- .

On the other hand, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention is a method of managing the battery cells B-A1 to B-An, B-B1 to B-Bn, To B-nn) is not the reference charging voltage, it is determined whether the current charging voltage is higher than the reference charging voltage (S909).

Here, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention includes the steps of measuring battery cells B-A1 to B-An, B-B1 to B-Bn, DC converter (DCC) for each of the battery cells (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-nn) A, DCC B, and DCC n and the sub DC / DC converters DCC A-1, DCC B-1, and DCC n-1 in step S911.

On the other hand, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention is a method of managing the battery cells B-A1 to B-An, B-B1 to B-Bn, To B-nn) is not higher than the reference charging voltage, it is determined whether the current charging voltage is lower than the reference charging voltage (S913).

Herein, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention is a method of managing the battery cells B-A1 to B-An, B-B1 to B-Bn, B-nn) is lower than the reference charging voltage, it is determined whether the current charging current is lower than the reference charging current (S915).

Here, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention includes the steps of measuring battery cells B-A1 to B-An, B-B1 to B-Bn, DC converter (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-nn) for the battery cells DCC A, DCC B, and DCC n) and the sub DC / DC converters DCC A-1, DCC B-1, and DCC n-1 in step S917.

On the other hand, the battery management method 900 using the battery management system 100 according to an embodiment of the present invention is a method of managing the battery cells B-A1 to B-An, B-B1 to B-Bn, (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-nn) are in a failure state when the current charging current for each of the battery cells (S919).

The battery management system 100 includes a first battery cell balancing unit 102, a second battery cell balancing unit 104, an nth battery cell balancing unit 106, A sensing unit 108, a display unit 110, and a control unit 112.

Therefore, the battery management system 100 according to an embodiment of the present invention is configured such that the battery management system 100 includes at least two battery cells B-A1 to B-An, B-B1 to B-Bn, B- (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-n1) are provided for each of the cells (B-A1 to B-An, B-B1 to B- B-nn), the present charge voltage, the current discharge current, and the present discharge voltage.

Accordingly, the battery management system 100 according to an embodiment of the present invention can maintain uniformity or non-uniformity of the battery cells (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B- Therefore, it is possible to prevent the battery from being exploded, so that a safety accident can be prevented in advance.

In addition, the battery management system 100 according to an embodiment of the present invention can measure the uniformity or non-uniformity of the battery cells (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B- It is possible to shorten the maintenance time at the time of maintenance, reduce the maintenance cost, and shorten the production time at the time of production, so that the production yield can be improved.

In addition, the battery management system 100 according to an embodiment of the present invention includes a first, second, n-sub DC / DC converter DCC A-1, a DCC B-1, a DCC n- 1).

Therefore, the battery management system 100 according to an embodiment of the present invention is configured such that the battery management system 100 includes at least two battery cells B-A1 to B-An, B-B1 to B-Bn, B- (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B-n1) are provided for each of the cells (B-A1 to B-An, B-B1 to B- B-B1 to B-Bn, B-Bn) when sensing and displaying at least one of the present charging current, the present charging voltage, the current discharge current and the current discharge voltage of the battery cells the charging time point or the discharging time point, which is a criterion for charging or discharging the present charging voltage with respect to -n1 to Bnn, can be accurately determined.

Accordingly, the battery management system 100 according to an embodiment of the present invention can maintain uniformity or non-uniformity of the battery cells (B-A1 to B-An, B-B1 to B-Bn, B-n1 to B- The battery can be prevented from being detonated further, so that a safety accident can be prevented in advance.

100: Battery management system 101: Load
102: first battery cell balancing unit 104: second battery cell balancing unit
106: nth battery cell balancing unit 108: first sensing unit
110: display unit 112:
112a: A / D converter 112b:

Claims (10)

A first battery cell balancing unit including at least two battery cells to perform battery cell balancing when supplying power to the load and charging or discharging the battery;
A second battery cell balancing unit including at least two battery cells for performing battery cell balancing when supplying power to the load and charging or discharging the battery;
An nth battery cell balancing unit including at least two battery cells for performing battery cell balancing when supplying power to the load and charging or discharging the battery;
A first sensing unit for sensing at least one of a current charging current, a present charging voltage, a current discharging current, and a current discharging voltage of the battery cell for each of at least two battery cells;
A display unit for displaying at least one of the sensed current charging current, the current charging voltage, the current discharging current and the current discharging voltage; And
Wherein the control unit controls the first battery cell balancing unit, the second battery cell balancing unit, the nth battery cell balancing unit, the first sensing unit and the display unit, or controls the first charging current signal for the current charging current and the current And a control unit receiving at least one of a first charging voltage signal for a charging voltage and a first discharging current signal for the current discharging current and a first discharging voltage signal for the current discharging voltage,
The first battery cell balancing unit includes:
A first main DC / DC converter electrically connected to the control unit and converting the DC power level to another DC power level;
At least two battery cells electrically connected to the control unit and the first main DC / DC converter, the at least two battery cells receiving input power from the input power supply means of the control unit and charging the battery cells;
And a second main DC / DC converter, which is electrically connected to the controller, the battery cell and the first sensing unit, and generates a current charging voltage for the battery cell when the current charging voltage is higher than a reference charging voltage, And when the current charging voltage is lower than the reference charging voltage, the first main DC / DC converter receives the target charging voltage whose DC current level is adjusted to perform the battery cell balancing At least two first sub-dc / dc converters for adjusting a DC power supply level so as to control the DC power supply level;
The second battery cell balancing unit includes:
A second main DC / DC converter electrically connected to the control unit and converting the DC power level to another DC power level;
At least two battery cells electrically connected to the control unit and the second main DC / DC converter, the at least two battery cells receiving input power from the input power supply means of the control unit and charging the battery cells;
And a second main DC / DC converter which is electrically connected to the control unit, the battery cell and the first sensing unit, and generates a current charging voltage for the battery cell when the current charging voltage is higher than a reference charging voltage, And when a battery cell having the current charging voltage lower than the reference charging voltage is generated, the second main DC / DC converter receives the target charging voltage whose DC current level is adjusted to perform the battery cell balancing At least two second sub-DC / DC converters for adjusting the DC power level so as to adjust the DC power level;
Wherein the nth battery cell balancing unit comprises:
An nth main DC / DC converter electrically connected to the control unit and converting the DC power level to another DC power level;
At least two battery cells electrically connected to the control unit and the nth main DC / DC converter, the at least two battery cells receiving input power from the input power supply means of the control unit and charging the battery cells;
Wherein the control unit is electrically connected to the control unit, the battery cell and the first sensing unit, and when a battery cell having a current charging voltage higher than a reference charging voltage is generated for the battery cell, And when the battery cell having the current charging voltage lower than the reference charging voltage is generated, the charging voltage balancing is performed by receiving the target charging voltage whose DC current level is adjusted by the nth main DC / DC converter At least two n-th sub-dc / dc converters for adjusting the dc power level so as to adjust the dc power level;
The display unit includes:
Wherein the control unit outputs a faulty state of the battery cell when it is determined that the current charging voltage of each battery cell is lower than the reference charging voltage and the current charging current of each battery cell is not lower than the reference charging current. delete The method according to claim 1,
Wherein the first sub DC / DC converter includes:
A comparator in which a first input side is electrically connected to the battery cell, a second input side is electrically connected to the first sensing unit and the load, and an output side is electrically connected to the control unit; And
A second input of the comparator and an output of the comparator, and at least one resistor electrically coupled to the first sensing unit and the load. The method of claim 3,
Wherein the first sub DC / DC converter includes:
A Zener diode electrically connected to the second input side of the comparator and the at least one resistor and provided to accurately determine a charging time point or a discharging time point as a reference for charging or discharging a current charging voltage for the battery cell, Includes a battery management system. delete The method according to claim 1,
Wherein the second sub DC / DC converter includes:
A comparator in which a first input side is electrically connected to the battery cell, a second input side is electrically connected to the first sensing unit and the load, and an output side is electrically connected to the control unit; And
A second input of the comparator and an output of the comparator, and at least one resistor electrically coupled to the first sensing unit and the load. The method according to claim 6,
Wherein the second sub DC / DC converter includes:
A Zener diode electrically connected to the second input side of the comparator and the at least one resistor and provided to accurately determine a charging time point or a discharging time point as a reference for charging or discharging a current charging voltage for the battery cell, Includes a battery management system. delete The method according to claim 1,
Wherein the nth sub DC / DC converter comprises:
A comparator in which a first input side is electrically connected to the battery cell, a second input side is electrically connected to the first sensing unit and the load, and an output side is electrically connected to the control unit; And
A second input of the comparator and an output of the comparator, and at least one resistor electrically coupled to the first sensing unit and the load. 10. The method of claim 9,
Wherein the nth sub DC / DC converter comprises:
A Zener diode electrically connected to the second input side of the comparator and the at least one resistor and provided to accurately determine a charging time point or a discharging time point as a reference for charging or discharging a current charging voltage for the battery cell, Includes a battery management system.

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