KR20160125285A - Battery control apparatus, battery module, battery pack, and battery control method - Google Patents

Abstract

A battery control apparatus is disclosed. According to an embodiment of the present invention, the battery control apparatus defines an output value of a converter corresponding to each of a plurality of battery units based on state information of the plurality of battery units, and generates a control signal for controlling each converter to supply power corresponding to the output value to a load. Since the battery control apparatus can control power corresponding to a capacity and/or an SoC difference between battery modules, a battery pack or a battery module including the battery control apparatus can be miniaturized or can be lightened.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery control device, a battery module, a battery pack,

The following embodiments relate to the control of a battery cell or a battery module.

When charging and discharging are repeatedly performed on a plurality of cells constituting the battery, a chemical difference or an aging difference or the like of each of a plurality of cells may occur, and a voltage deviation or a difference between a plurality of cells due to a chemical difference, A capacity deviation may occur. As a result, a specific cell may be overcharged or overdischarged. As a result, the capacity of the battery may be reduced, and the battery may be deteriorated to reduce the life of the battery.

The battery control apparatus according to claim 1, further comprising: a processing unit for defining an output value of a converter corresponding to each of the plurality of battery units based on state information of the plurality of battery units; And a signal generator for generating a control signal for controlling each of the converters so that power corresponding to the output value is supplied to the load.

The processing unit may acquire state difference information of each of the plurality of battery units using the state information, and determine whether the state difference information falls within a predetermined range.

The processing unit may define an output value of each of the converters using at least one of the state difference information and the required power of the load based on the confirmation.

The processing unit may check whether or not the state difference information is negative if the state difference information does not fall within the predetermined range, and if the state difference information is negative, And generate a control signal for controlling the battery and the corresponding converter to charge the battery.

The battery control device may further include a communication unit for transmitting the control signal to each of the plurality of battery units.

The output value of the converter corresponding to each of the plurality of battery units may be proportional to the state difference information of each of the plurality of battery units.

The output of the converter and the corresponding power can be delivered to a low voltage load, either a low voltage load or a high voltage load.

A battery module according to one side comprises at least one battery cell; A converter connected to the battery cell; And a controller for receiving the output value of the converter defined on the basis of the state information of the battery module and other battery modules from the external controller and controlling the converter such that power corresponding to the output value is supplied to the load.

The output value of the converter may be defined to correspond to the state difference information when the state difference information of the battery module obtained using the state information belongs to a predetermined range.

The output value of the converter may be proportional to the state difference information of the battery module.

The converter can control the battery cell based on the output value.

The output of the converter and the corresponding power can be delivered to a low voltage load, either a low voltage load or a high voltage load.

The battery module may be connected in series with the other battery module.

The battery module comprising: a first connector including a low voltage port connected to an output end of the converter; And a second connector for connecting with the other battery module.

A battery pack according to one side includes a plurality of battery modules; A converter corresponding to each of the plurality of battery modules; And a main controller for defining an output value of each of the converters based on state information of the plurality of battery modules and generating a control signal for controlling each of the converters so that power corresponding to the output value is supplied to the load.

The main controller can acquire the state difference information of each of the plurality of battery modules using the state information of the plurality of battery modules and determines whether the state difference information of each of the plurality of battery modules belongs to a predetermined range .

The main controller can define an output value of the converter corresponding to each of the plurality of battery modules using at least one of the state difference information and the required power of the load based on the confirmation.

Each of the plurality of battery modules includes a sub-controller, and the sub-controller can control the converter such that power corresponding to the defined output value is supplied to the load.

The output value of the converter corresponding to each of the plurality of battery modules may be proportional to the state difference information of each of the plurality of battery modules.

A first line for delivering high voltage power output from the plurality of battery modules to a high voltage load; And a second line for transferring the low voltage power output from the plurality of battery modules to a low voltage load, wherein the high voltage power may be power not converted by the converter, May be a power converted to correspond to the output value.

Each of the converters may be connected in parallel with each other.

The plurality of battery modules may be connected in series.

The battery control method according to one aspect includes defining an output value of a converter corresponding to each of the plurality of battery units based on status information of a plurality of battery units; And generating a control signal for controlling each of the converters so that the power corresponding to the defined output value is supplied to the load.

The step of defining the output value may include obtaining state difference information of each of the plurality of battery units using the state information and checking whether the state difference information is within a predetermined range.

The step of defining the output value may include the step of defining an output value of each of the converters using at least one of the state difference information and the required power of the load based on the confirmation.

The step of defining the output value may include checking whether the state difference information is negative if the state difference information does not fall within the predetermined range, and the step of generating the control signal may include: , Generating a control signal for controlling the battery unit and the corresponding converter to charge the battery unit having the negative state difference information.

The output value of the converter corresponding to each of the plurality of battery units may be proportional to the state difference information of each of the plurality of battery units.

And transmitting the control signal to each of the plurality of battery units.

The output of the converter and the corresponding power can be delivered to a low voltage load, either a low voltage load or a high voltage load.

An apparatus according to one side includes a battery pack including a plurality of battery modules and a converter electrically connected to each of the plurality of battery modules; A low power load electrically connected to the battery pack through the converter; And a high power load electrically connected to the battery pack without passing through the converter.

Acquiring state difference information of each of the plurality of battery modules using state information of the plurality of battery modules, checking whether the state difference information falls within a predetermined range, The difference information, and the required power of the low power load to define an output value of the converter.

The main controller may transmit an output value of the converter to a corresponding battery module of the converter and the corresponding battery module may include a sub controller that controls the converter such that power corresponding to the output value is supplied to the low power load .

1A to 1B are views for explaining a battery control apparatus according to an embodiment.
2 is a view for explaining a battery module according to an embodiment.
3 is a view for explaining an example of a battery module according to an embodiment.
4 is a view for explaining another example of a battery module according to an embodiment.
5 is a block diagram for explaining a battery pack according to an embodiment.
6 is a view for explaining a battery pack according to an embodiment.
7 is a diagram for explaining power supply according to an embodiment.
8 is a view for explaining a converter package included in the battery pack according to the embodiment.
9 is a flowchart illustrating a battery control method according to an embodiment.
10 is a view for explaining a user interface for providing battery status information according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

It is to be understood that the embodiments described below do not limit the embodiments, but equivalents and alternatives to various modifications are included in the scope of the present invention.

The terms used in the examples are used only to illustrate specific embodiments, and are not intended to limit the examples. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

1A to 1B are views for explaining a battery control apparatus according to an embodiment.

Referring to FIG. 1A, a battery control apparatus 100 according to an embodiment includes a processing unit 110 and a signal generating unit 120.

The processing unit 110 acquires sensing data of a plurality of battery units. Each of the plurality of battery units may represent a battery module or a battery cell. When each of the plurality of battery units is a battery module, each battery module may include one or a plurality of battery cells. The plurality of battery cells included in the battery module may be connected in series with each other.

The battery control apparatus 100 receives sensing data from each of the plurality of battery units. The sensing data may include, for example, voltage data of the battery section, current data, temperature data, and / or impedance data. In one embodiment, each of the plurality of battery units may include a controller. The controller generates a control signal for sensing the voltage, current, temperature, and / or impedance of the battery section. The sensing data of the battery section can be generated based on the control signal of the controller and the controller can transmit the sensing data to the battery control apparatus 100. [

The controller included in each of the battery control apparatus 100 and the plurality of battery sections may be a master-slave relationship. The battery control apparatus 100 transmits a command to a controller included in each of a plurality of battery units as a master. The controller can receive the command from the battery control device 100 and operate as a slave.

The processing unit 110 acquires status information of each of the plurality of battery units based on the sensing data of each of the plurality of battery units. The state information may include, for example, a state of charge (SoC), a lifetime information (SoH), and / or a capacity. The processing unit 110 may store status information and / or sensing data of each of the plurality of battery units in a memory.

The processing unit 110 defines an output value of the converter corresponding to each of the plurality of battery units based on state information of the plurality of battery units. The converter may be a DC-DC converter, or an isolated converter. In addition, the converter may be a unidirectional converter or a bidirectional converter. The type of the converter described above is only an example according to the embodiment, and the type of the converter is not limited to the above.

SoC를 획득할 수 있다. 예를 들어, 프로세싱부(110)는 인덱스 n을 갖는 배터리부의

SoC_n를 획득할 수 있다. The processing unit 110 acquires the state difference information of each of the plurality of battery units using the state information of each of the plurality of battery units. For example, the processing unit 110 may calculate an _average SoC _average based on the SoC of each of the plurality of battery units, and may calculate a difference between the SoC and the SoC _average of each of the plurality of battery units.

SoC can be obtained. For example, the processing unit 110 may be configured so that the battery unit having the index n

SoC _n can be obtained.

The processing unit 110 acquires the required power (P _LDC ) of the low voltage load (Low Voltage Load). The processing unit 110 may obtain the average required power (P _{_average LDC)} of the low-voltage load.

The processing unit 110 confirms whether the obtained state difference information belongs to the first range. Further, the processing unit 110 defines the output value _{Ptarget_n of} each of the converters by using the state difference information and / or the required power of the low voltage load, based on whether or not to confirm. Thus, the output value of each of the converters can be defined differently, so that the battery section in which a relatively large amount of power is stored can supply more power to the low-power load, and the battery section in which the power is relatively low can supply less power to the low- . As a result, the states of the plurality of battery units can be equalized.

SoC_n으로 정의할 수 있다. 도 1b를 참조하면서, 구체적으로 설명한다.In one embodiment, the case is not more than 0.01 difference status information, the processing unit 110 may determine the P _{Target _n} on the basis of the P _{LDC _average.} If the status information is the difference exceeds 0.01, the processing unit 110 includes a P _{Target _n} P _{LDC _average} + P × _{LDC _average}

SoC _n . Will be described in detail with reference to FIG. 1B.

Referring to FIG. 1B, the output values of each of the converters are shown.

SoC_n의 절대값이 0.01이하인 경우, 컨버터 각각의 출력값은 P_{LDC _average}으로 정의될 수 있다. 복수의 컨버터 각각은 10W를 저전압 부하로 공급할 수 있다.If the SoCs of the plurality of battery units are substantially the same, the output value of each of the converters may be substantially the same. Let P _LDC = 30W. In the example shown in Fig. 1B, the number of converters is three. P is the _{LDC _average = 30/3 = 10W} . As in the example shown on the left side of FIG. 1B,

If the absolute value of more than 0.01 SoC _n, each of the converter output may be defined as P _{LDC _average.} Each of the plurality of converters can supply 10W to a low voltage load.

Over time, differences may occur between SoC ₁ , SoC ₂ , and SoC ₃ . In this case, if the output values of the respective converters are defined to be substantially equal, the unevenness of the SoCs of the plurality of battery units can continue. Accordingly, the specific battery part can be over-discharged and damaged. In addition, when a plurality of battery units are charged while the unevenness of the SoCs of the plurality of battery units is maintained, the specific battery unit is not buffered, and the energy utilization rate of the plurality of battery units may be lowered. In other words, when a plurality of battery units are charged and discharged in a state where unevenness of the SoCs of a plurality of battery units is maintained, a plurality of battery units may be damaged, the lifetime may be shortened, and the energy utilization rate may be lowered.

SoC_n의 절대값이 0.01이상인 경우, 컨버터 각각의 출력값은 P_{LDC_average}+P_{LDC_average}×

SoC_n으로 정의될 수 있다. 도 1b의 오른쪽에 도시된 예의 경우에서, 컨버터 각각의 출력값은 서로 다르게 정의될 수 있다.According to one embodiment, to compensate for the un-equalization of the SoCs of the plurality of battery compartments

When the absolute value of SoC _n is 0.01 or more, the output value of each converter is P _{LDC_average} + P _{LDC_average} ×

SoC _n . In the case of the example shown on the right side of FIG. 1B, the output values of the respective converters may be defined differently.

For example, let SoC ₁ = 0.53, SoC ₂ = 0.75, and SoC ₃ = 0.46.

SoC _average = (0.53 + 0.75 + 0.46) /3=0.58.

SoC₁=-0.05,

SoC₂=0.17, 및

SoC₃=-0.12가 되어

SoC_n의 절대값이 0.01이상이다. 이 경우, 프로세싱부(110)는 P_{Target _1} 내지 P_{Target _3}을 아래와 같이 정의할 수 있다.

SoC ₁ = -0.05,

SoC ₂ = 0.17, and

SoC ₃ = -0.12

The absolute value of SoC _n is 0.01 or more. In this case, the processing unit 110 may be defined as: P a P _{Target Target _1} to _{_3.}

P _{Target _ 1} = 10 + 10 x (-0.05) = 9.5 W

P _{Target _2} = 10 + 10 x (0.17) = 11.7 W

P _{Target _3} = 10 + 10 x (-0.12) = 8.8 W

Battery part ₂ with SoC ₂ can supply more power to the low voltage load, and battery part ₃ with SoC ₃ can supply less power to the low voltage load. Thus, the unevenness of SoC ₁ , SoC ₂ , and SoC ₃ can be compensated. Therefore, even if the charging and discharging cycles of the plurality of battery units are increased, the specific battery unit may not be overdischarged. Further, the energy utilization rate of a plurality of battery sections can be increased, and a plurality of battery sections can be used for a long time.

P _{Target Target _1} to _{_3} P may be different from each other, each defining a sum of P _{Target Target _1} to _{_3} P is 30W. In other words, the processing unit 110 may define the P _{Target _1} to _{_3} P _Target each be satisfied to the load power requirements, but defining different P _{Target _1} to _{_3} P _Target each other. P _{Target Target _1} to _{_3} P may be different from each other, each defining a certain amount of power is supplied to the low-voltage load.

SoC_n<0인 경우, 프로세싱부(110)는

SoC_n을 0으로 설정할 수 있고, 설정을 기초로 P_{Target _n}을 결정할 수 있다. 위에서 설명한 예에서, P_{Target _1} 및 P_{Target _3}은 10W로 정의될 수 있다. 이 경우, P_{Target _n}의 총 합은 P_LDC를 초과할 수 있다. P_{Target _n}의 총 합이 P_LDC를 초과하는 경우, 초과하는 전력은 보조 전력 저장부로 공급되어 보조 전력 저장부가 충전될 수 있다.In one embodiment, if the obtained state difference information does not belong to the first range, the processing unit 110 can check whether the state difference information is negative. In the example described above, SoC ₁ and SoC ₃ are negative numbers. The processing unit 110 may set the state difference information, which is negative, to zero. In other words,

When SoC _n < 0, the processing unit 110

It can be set to zero _n the SoC can be determined based on the set P _{Target _n.} In the example described above, P _{Target _ 1} and P _{Target _ 3} can be defined as 10W. The total sum of these cases, P _{Target _n} may exceed P _LDC. If the total sum of the P _{Target _n} exceed P _LDC, power in excess is supplied to the auxiliary power storage can be charged with auxiliary electric power storage unit.

SoC_n가 음수인 경우는 배터리부_n에 저장된 전력이 다른 배터리부에 저장된 전력보다 작을 가능성이 높다는 의미이므로 프로세싱부(110)는 배터리부_n을 충전하기 위한 제어 신호를 생성할 수 있다. 이에 따라, 배터리부_n은 충전될 수 있고, 복수의 배터리부의 SoC의 불균등이 보상될 수 있다.In addition, when the state difference information is negative, the processing unit 110 controls the converter corresponding to the battery unit to charge the battery unit having the negative state difference information without setting the state difference information as a negative value to zero Signal can be generated.

If the SoC _n is negative, it means that the power stored in the battery unit _n is likely to be smaller than the power stored in the other battery unit. Therefore, the processing unit 110 can generate a control signal for charging the battery unit _n. Thereby, the battery part _n can be charged, and the unevenness of the SoCs of the plurality of battery parts can be compensated.

Referring again to FIG. 1A, the signal generating unit 120 generates a control signal for controlling each of the converters so that the power corresponding to the output value of the converter corresponding to each of the plurality of battery units is supplied to the low-power load. In one example, the signal generator 120 may generate a control signal based on the P _{Target _n.} In other words, the battery control device 100 can perform cell balancing by defining output values of the converters differently from each other.

The battery control apparatus 100 may further include a communication unit (not shown). The communication unit transmits the control signal generated by the signal generating unit 120 to each of the plurality of battery units. For example, the communication unit can transmit a control signal through a CAN (Controller Area Network) method, a 1-wire method, or a 2-wire method. The communication method of the communication unit described above is only an example, and the communication method of the communication unit is not limited by the above description.

2 is a view for explaining a battery module according to an embodiment.

2, a battery module 200 according to one embodiment includes one or more battery cells 210, a converter 220, a controller 230, a first connector 240, and a second connector 250 And 251).

The battery cell 210 stores power. When there are a plurality of battery cells 210, the battery cells 210 may be connected in series.

The converter 220 is electrically connected to the battery cell 210. The converter 220 may control the output current, the output voltage, and / or the output power of the battery cell 210.

Converter 220 may be a bi-directional converter. In this case, the battery module 200 may have the structure shown in FIG. In the structure shown in FIG. 3, the battery cell 310 can be charged according to the operation of the bidirectional converter 320.

In addition, converter 220 may be an isolated converter. The isolated converter may include, for example, a forward converter. The structure of the battery module including the forward converter is shown in Fig. Unlike the battery cell of FIG. 3, the battery cell 410 is not charged according to the operation of the forward converter 420. Referring to FIG. 4, the controller 410 may generate a gate drive signal based on a control signal received from an external controller, and may transmit a gate drive signal to the converter 420. The switch included in the converter 420 can operate based on the gate drive signal. When a gate drive signal is applied to the switch, the switch is turned on and a current flows through the primary winding of the converter 420. When current flows through the primary winding, induction current flows through the secondary winding by mutual induction. The output current corresponding to the output value of the converter 420 can be output based on the induced current flowing in the secondary winding.

The controller 230 controls the converter 220 and communicates with the external controller via the receive port 242 and the transmit port 243 included in the first connector 240. [ In addition, the controller 230 may transmit sensing data of the battery cell 210 to an external controller.

Since the external controller can correspond to the battery control apparatus described with reference to FIG. 1, a detailed description of the external controller will be omitted.

The controller 230 receives the output value of the converter 220 defined on the basis of the status information of the battery module 200 and other battery modules from the external controller. Further, the controller 230 controls the converter 220 so that the power corresponding to the output value of the converter 220 is supplied to the load. The controller 230 may control the converter 220 based on the control signal and the converter 220 may control the battery cell 210 such that the output value and corresponding power are supplied to the low voltage load.

The output terminal of the converter 220 is connected to the low voltage port (12V _DC port) 241 and the ground port 244 included in the first connector 240. The power output from the converter 220 can be supplied to the low voltage load. The low voltage load may include, for example, a system capable of operating at a low voltage (12V), such as a temperature control system or an attitude control system of an electric vehicle. Further, the low voltage load may include an auxiliary power storage, and the power output from the converter 220 may be stored in the auxiliary power storage.

The second connectors 250 and 251 of the battery module 200 are connected to other battery modules. The battery module 200 and other battery modules can be connected in series and can supply power to the high voltage load based on the control of the external controller. The high voltage load may include, for example, a motor of an electric vehicle, an inverter, and / or an on board charger.

5 is a block diagram for explaining a battery pack according to an embodiment.

Referring to FIG. 5, a battery pack 500 according to an embodiment includes a plurality of battery modules 510 to 530 and a main controller 540. Further, the battery pack 500 includes a plurality of battery modules and a corresponding converter (see FIG. 2).

Each of the plurality of battery modules 510 to 530 may include one or a plurality of battery cells and a sub-controller.

Each of the plurality of battery modules 510 to 530 and the corresponding converter may be an isolated converter as a DC-DC converter. The converter may convert the power stored in the battery cell to an operating voltage (e.g., 12V) of the undervoltage load. The converter can be located inside the battery module or outside the battery module.

The sub-controller transmits the sensing data of the battery module to the main controller 540. The main controller 540 defines an output value of the converter corresponding to each of the plurality of battery modules based on status information of the plurality of battery modules. Since it has been described above that the state difference information is included in the first range to define the output value of the converter, a detailed description will be omitted. Hereinafter, the main controller 540 confirms the other information and defines the output value of the converter.

SoC_n으로 정의하여 불균등을 보상할 수 있다.The main controller 540 can determine the output value of the converter by checking whether SoC _n is within the second range. The second range may be a SoC _average x (1-a) or more and a SoC _average x (1 + a) or less. Here, a is an arbitrary constant, for example, 0.01. In the example described with reference to FIG. 1B, the second range may be 0.57 (= 0.58 x 0.99)? SoC _n? 0.59 (= 0.58 x 1.01). Also, the main controller 540 can determine the maximum value and the minimum value among the SoC ₁ to SoC _N , and determine the output value of the converter by checking whether the difference between the maximum value and the minimum value is equal to or greater than a predetermined reference value. If the SoC _n does not fall within the second range or if the difference between the maximum value and the minimum value is greater than or equal to the predetermined reference, the main controller 540 sets P _{Target_n} to P _{LDC_average} + P _{LDC_average} ×

SoC _n can be defined to compensate for unevenness.

Capacity_n을 이용할 수 있고,

Capacity_n이 0.01보다 큰 경우, P_{LDC_average}×

Capacity_n를 기초로 P_{Target _n}을 정의할 수 있다. 또한, 메인 컨트롤러(540)는

SoC_n 및

Capacity_n를 고려하여 P_{Target _n}을 정의할 수 있다. 상술한 컨버터의 출력값의 정의는 예시적인 사항일 뿐, 컨버터의 출력값의 정의는 상술한 설명에 의해 제한되지 않는다.The output value of the converter can be defined based on the capacity of the battery module instead of the SoC of the battery module. For example, the main controller 540 may determine Capacity _n Capacity _average =

Capacity _n can be used,

When the capacity _n is larger than 0.01, P _{LDC_average} ×

Based on the Capacity _n it can be defined for P _{Target _n.} In addition, the main controller 540

SoC _n and

In consideration of the Capacity _n may define a P _{Target _n.} The definition of the output value of the converter is only an example, and the definition of the output value of the converter is not limited by the above description.

The main controller 540 generates a control signal for controlling each of the converters so that the power corresponding to the output value is supplied to the load. In addition, the main controller 540 may transmit control signals to the plurality of battery modules 510 to 530, respectively. The sub-controller included in each of the plurality of battery modules 510 to 530 can control the converter based on the control signal. The subcontroller can control the converter so that power corresponding to the defined output value is supplied to the load.

A line 560 for supplying power from the battery pack 500 to the low voltage load 570 and a line 550 for supplying power to the high voltage load 580 can be distinguished from each other. In Fig. 5, line 550 is represented by a thick solid line, and line 560 is represented by a dotted line. The plurality of battery modules 510 to 530 connected in series may be connected to the line 550. The plurality of battery modules 510 to 530 can supply power to the high voltage load 580 without converting the power stored in the battery cells included in each of the plurality of battery modules 510 to 530. [ Further, the plurality of battery modules 510 to 530 can step down the power stored in the battery cell from the high voltage to the low voltage through the corresponding converter, and can supply the stepped down power to the low voltage load 570 have.

1 through 4 can be applied to the matters described with reference to FIG. 5, detailed description will be omitted. The matters described with reference to FIG. 5 may be applied to the matters described with reference to FIG. 1 through FIG.

6 is a view for explaining a battery pack according to an embodiment.

Referring to FIG. 6, a battery pack 600 according to an embodiment includes a plurality of battery modules 610 to 630 and a main controller 640.

Each of the plurality of battery modules 610 to 630 may include a converter 611, 621, or 631 and a sub BMS (Battery Management System) / controller. Each sub BMS (Battery Management System) / controller can manage the voltage, current, temperature, and / or impedance of each of the plurality of battery modules 610 to 630. The converter 611, the converter 621, and the converter 631 may be connected in parallel.

Each of the plurality of battery modules 610 to 630 may be the battery module described with reference to FIG. In addition, each of the plurality of battery modules 610 to 630 may be the battery module described with reference to FIG. 3 or FIG.

The main BMS 641 may include an SPI (Serial Peripheral Interface) and may communicate with a sub BMS / controller included in each of the plurality of battery modules 610 to 630 by being connected to the network through the SPI. The main BMS 641 may transmit a control signal for controlling the converters 611, 621, and 631 to the sub BMS / controller included in each of the plurality of battery modules 610 to 630 through communication. Each sub BMS / controller can control each of the converters 611, 621, and 631 based on the control signal.

The main controller 640 may be coupled to the junction box 650. The junction box 650 can relay low-voltage power and high-voltage power output from the plurality of battery modules 610 to 630, respectively. The relay 651 included in the junction box 650 can transfer the low voltage power to the auxiliary power storage and / or the low voltage load and the fuse box / relay 652 included in the junction box 650 can transfer the main relay / Voltage power delivered from the sensor 642 to the high-voltage load.

Since the matters described with reference to Figs. 1 to 5 can be applied to Fig. 6, detailed description will be omitted.

7 is a diagram for explaining power supply according to an embodiment.

Referring to Figure 7, P _{Target _1} represents the output power of the converter (711), P _{Target _2} represents the output power of the converter (721), P _{Target _3} shows the output power of the converter 731.

The output values of the plurality of converters 711, 721, and 731 may be defined differently. Accordingly, different powers can be output from the plurality of converters 711, 721, and 731. [ In this case, the sum of the output powers of the converters may not correspond to P _LDC . If the sum of the respective output values of the converter is greater than P _LDC, power in excess of P _LDC may be used to fill a storage unit with auxiliary electric power. If the sum of the outputs of each of the converters is less than P _LDC , the auxiliary power storage can supply power to the low power load and P _LDC can be satisfied.

8 is a view for explaining a converter package included in the battery pack according to the embodiment.

In the case of the example shown in FIG. 6, the individual battery module includes a converter and a sub BMS / subcontroller. 8 illustrates that a plurality of converters 810 through 830 and a plurality of sub BMSs / subcontrollers, not the converter and the sub BMS / subcontroller being included in the battery module, are the physical devices implemented as a single package 800 . Here, the controller 840 implements a plurality of sub-BMSs / sub-controllers shown in FIG. 6 as one physical device.

The converter package 800 may be located physically remote from the plurality of battery modules within the battery pack.

Each of the plurality of converters 810 to 830 is connected to a corresponding battery module or battery cell. The output terminal of the first battery module is connected to the converter 810 through the input 1 and the output terminal of the second battery module is connected to the converter 820 through the input 2, Is connected to the converter 830 through an input N (Input N).

Each of the plurality of converters 810 through 830 can be connected in parallel and can supply power to the auxiliary power storage 850 and / or the low voltage load through the low voltage port.

1 through 7 can be applied to the matters described with reference to FIG. 8, detailed description thereof will be omitted.

9 is a flowchart illustrating a battery control method according to an embodiment.

A battery control method according to an embodiment may be performed by a battery control apparatus.

Referring to FIG. 9, the battery control apparatus defines an output value of a converter corresponding to each of a plurality of battery units based on state information of a plurality of battery units (910).

The battery control device generates a control signal that controls each of the converters so that the defined output value and the corresponding power are supplied to the load (920).

The battery control device transmits a control signal (930). For example, the battery control apparatus can transmit a control signal to a controller included in each of the plurality of battery units.

1 to 8 can be applied to the matters described with reference to FIG. 9, so that a detailed description thereof will be omitted.

10 is a view for explaining a user interface for providing battery status information according to an embodiment.

Referring to FIG. 10, an electric vehicle 1010 includes a battery system 1020.

The battery system 1020 includes a plurality of battery units 1030 and a battery control apparatus 1040.

The plurality of battery units 1030 may include a battery module or a battery cell.

Over-charging and over-charging of the battery pack may occur if a charge / discharge cycle of the battery pack having a performance deviation (for example, a voltage difference or a capacity difference) between the plurality of battery units 1030 is repeated. discharging may occur and the plurality of battery units 1030 may be degraded due to overcharge and overdischarge, so that the life of the plurality of battery units 1030 may be shortened.

The battery control apparatus 1040 can operate the plurality of battery units 1030 in an optimal state based on information on the voltage, current, and / or temperature of the plurality of battery units 1030. For example, the battery control apparatus 1040 may cause the plurality of battery units 1030 to operate at the optimum temperature or maintain the SoC of the plurality of battery units 1030 at an appropriate level.

In one embodiment, the battery control apparatus 1040 can check whether the status information of the plurality of battery units 1030 is equalized. In addition, when the state information of the plurality of battery units 1030 is un-equalized, the battery control apparatus 1040 can generate power corresponding to the state difference information generated according to the unevenness, Power can be used as a power source for the undervoltage load. By using the state difference information generated in accordance with the unevenness, balancing of the plurality of battery units 1030 can be effectively performed, thereby increasing the service life of the plurality of battery units 1030. [

Also, the battery control apparatus 1040 can generate information for safe operation of the battery system 1020, and can transmit information for safe operation to the terminal. For example, the battery control apparatus 1040 may transmit lifetime information, performance information, and / or replacement timing of a plurality of battery units 1030 to the terminal 1050.

In one embodiment, the battery control apparatus 1040 can receive a trigger signal from the terminal 1050 via the air interface, and can receive status information (e.g., life information) of the battery unit 1030 based on the trigger signal, Can be estimated. The battery control apparatus 1040 may transmit status information to the terminal 1050 using a wireless interface. The terminal 1050 can display status information of the battery unit 1010 using the user interface 1060. [

1 through 9 can be applied to the matters described with reference to FIG. 10, detailed description thereof will be omitted.

A low-voltage DC / DC converter (LDC) required for charging an electric vehicle (for example, an electric vehicle) or an auxiliary battery included in an energy storage system through a battery control device according to an embodiment may be substituted. In addition, the LDC required to supply power to a device or a subsystem that requires a 12V _DC voltage included in an electric vehicle or the like may be replaced with a battery control device according to an embodiment.

In addition, the battery control device according to an embodiment can control the power corresponding to the capacity and / or the SoC difference between the battery modules, so that the battery pack or the battery module including the battery control device can be miniaturized or lightened.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described with reference to the drawings, various technical modifications and variations may be applied to those skilled in the art based on the above description. For example, it is contemplated that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Appropriate results can be achieved even if substituted or replaced by equivalents.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (32)

A processing unit for defining an output value of a converter corresponding to each of the plurality of battery units based on state information of the plurality of battery units; And
And generates a control signal for controlling each of the converters so that power corresponding to the output value is supplied to the load,
/ RTI &gt;
Battery control device.
The method according to claim 1,
The processing unit includes:
Acquiring state difference information of each of the plurality of battery units using the state information, and checking whether the state difference information is within a predetermined range,
Battery control device.
3. The method of claim 2,
The processing unit includes:
Wherein the output value of each of the converters is defined using at least one of the state difference information and the required power of the load,
Battery control device.
3. The method of claim 2,
The processing unit includes:
Determining whether the state difference information is negative or not if the state difference information does not fall within the predetermined range,
Wherein the signal generator comprises:
And generates a control signal for controlling the converter corresponding to the battery unit to charge the battery unit having the negative difference state information when the state difference information is negative,
Battery control device.
The method according to claim 1,
Wherein the output value of the converter corresponding to each of the plurality of battery units
And a plurality of battery units, each of which is proportional to state difference information of each of the plurality of battery units,
Battery control device.
The method according to claim 1,
And a communication unit for transmitting the control signal to each of the plurality of battery units
&Lt; / RTI &gt;
Battery control device.
The method according to claim 1,
The power corresponding to the output value of the converter,
Under low and high voltage loads,
Battery control device.
In the battery module,
At least one battery cell;
A converter connected to the battery cell; And
A controller for receiving the output value of the converter defined on the basis of the state information of the battery module and another battery module from the external controller and controlling the converter to supply power corresponding to the output value to the load,
/ RTI &gt;
Battery module.
9. The method of claim 8,
The output value of the converter
Wherein the state information of the battery module obtained by using the state information belongs to a predetermined range,
Battery module.
9. The method of claim 8,
The output value of the converter
Wherein the battery module further comprises:
Battery module.
9. The method of claim 8,
The converter includes:
And controlling the battery cell based on the output value.
Battery module.
9. The method of claim 8,
The power corresponding to the output value of the converter,
Under low and high voltage loads,
Battery module.
9. The method of claim 8,
The battery module includes:
A battery module connected in series with the other battery module,
Battery module.
14. The method of claim 13,
The battery module includes:
A first connector including a low voltage port connected to an output end of the converter; And
And a second connector
/ RTI &gt;
Battery module.
In the battery pack,
A plurality of battery modules;
A converter corresponding to each of the plurality of battery modules; And
A main controller which defines an output value of each of the converters based on status information of the plurality of battery modules and generates a control signal for controlling each of the converters so that power corresponding to the output value is supplied to the load;
/ RTI &gt;
Battery pack.
16. The method of claim 15,
The main controller includes:
Acquiring state difference information of each of the plurality of battery modules by using state information of the plurality of battery modules, and checking whether state difference information of each of the plurality of battery modules belongs to a predetermined range,
Battery pack.
17. The method of claim 16,
The main controller includes:
Wherein the output value of the converter corresponding to each of the plurality of battery modules is defined using at least one of the state difference information and the required power of the load,
Battery pack.
16. The method of claim 15,
Wherein each of the plurality of battery modules includes:
A sub-controller,
The sub-
And controls the converter such that power corresponding to the defined output value is supplied to the load.
Battery pack.
16. The method of claim 15,
And an output value of a converter corresponding to each of the plurality of battery modules,
Wherein the plurality of battery modules includes a plurality of battery modules,
Battery pack.
16. The method of claim 15,
A first line for delivering high voltage power output from the plurality of battery modules to a high voltage load; And
A second line for transferring the low-voltage power output from the plurality of battery modules to a low-
Further comprising:
Wherein the high voltage power is a power that is not converted by the converter and the low voltage power is a power that the converter has converted to correspond to the output value,
Battery pack.
16. The method of claim 15,
Wherein each of the converters comprises:
Connected in parallel with each other,
Battery pack.
22. The method of claim 21,
Wherein the plurality of battery modules include:
Connected in series,
Battery pack.
Defining an output value of a converter corresponding to each of the plurality of battery units based on state information of the plurality of battery units; And
Generating a control signal for controlling each of the converters such that the defined output value and the corresponding power are supplied to the load
/ RTI &gt;
Battery control method.
24. The method of claim 23,
Wherein defining the output value comprises:
Acquiring state difference information of each of the plurality of battery units using the state information, and checking whether the state difference information falls within a predetermined range
/ RTI &gt;
Battery control method.
25. The method of claim 24,
Wherein defining the output value comprises:
Defining an output value of each of the converters using at least one of the state difference information and the required power of the load based on the confirmation;
/ RTI &gt;
Battery control method.
25. The method of claim 24,
Wherein defining the output value comprises:
Determining whether the state difference information is negative if it does not fall within the predetermined range,
Lt; / RTI &gt;
Wherein the step of generating the control signal comprises:
Generating a control signal for controlling the converter corresponding to the battery unit to charge the battery unit having the negative difference state information if the state difference information is negative;
/ RTI &gt;
Battery control method.
24. The method of claim 23,
Wherein the output value of the converter corresponding to each of the plurality of battery units
And a plurality of battery units, each of which is proportional to state difference information of each of the plurality of battery units,
Battery control method.
24. The method of claim 23,
Transmitting the control signal to each of the plurality of battery units
&Lt; / RTI &gt;
Battery control method.
24. The method of claim 23,
The power corresponding to the output value of the converter,
Under low and high voltage loads,
Battery control method.
A battery pack including a plurality of battery modules and a converter electrically connected to each of the plurality of battery modules;
A low power load electrically connected to the battery pack through the converter; And
A high-power load electrically connected to the battery pack without passing through the converter
/ RTI &gt;
Device.
31. The method of claim 30,
Acquiring state difference information of each of the plurality of battery modules using state information of the plurality of battery modules, checking whether the state difference information falls within a predetermined range, Wherein the main controller determines the output value of the converter using at least one of the difference information and the required power of the low-
&Lt; / RTI &gt;
Device.
32. The method of claim 31,
The main controller includes:
The output value of the converter is transmitted to the corresponding battery module of the converter,
The corresponding battery module includes:
And a sub-controller that controls the converter such that power corresponding to the output value is supplied to the low-power load,
Device.

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