Battery system, battery management system, and battery management method

Abstract

A battery system according to one embodiment disclosed herein includes a battery connected via a first line that supplies current to a load and a second line that supplies additional current to the load, and a battery management device that manages the battery, wherein the battery management device can control the current supplied to the load via the first line and the second line based on the state of the load.

Description

[Technical Field]

[0001] The present invention claims the benefit of priority based on Korean Patent Application No. 10-2022-0121947, filed on September 26, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] TECHNICAL FIELD The embodiments disclosed herein relate to a battery system, a battery management system, and a battery management method. [Background technology]

[0003] In recent years, research and development into secondary batteries has been actively pursued. Here, secondary batteries are batteries that can be charged and discharged, and include both conventional Ni / Cd batteries, Ni / MH (nickel / metal hydride) batteries, and more recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries have the advantage of having a much higher energy density than conventional Ni / Cd batteries, Ni / MH batteries, and other batteries. Furthermore, because lithium-ion batteries can be manufactured to be compact and lightweight, they are used as power sources for mobile devices. In recent years, their range of use has expanded to include power sources for electric vehicles, and they are attracting attention as a next-generation energy storage medium.

[0004] In systems consisting of motors, inverters, converters, and batteries for driving electric propulsion systems (e.g., airplanes, automobiles, ships, etc.), the batteries can be connected in parallel to prevent loss of propulsion and control in emergency situations. When batteries are connected in parallel, if a problem occurs in one or more batteries, the problematic batteries can be removed from the power path, ensuring the power stability of the entire system. However, when a load imbalance occurs in batteries connected in parallel (e.g., when an airplane is turning), current concentrates in the power path that is under load, making it difficult to obtain the desired power. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the embodiments disclosed in the present application is to provide a battery system, a battery management system, and a battery management method that can output desired power by supplying additional current when a load imbalance occurs.

[0006] One objective of the embodiments disclosed herein is to provide a battery system, a battery management system, and a battery management method that can supply additional current by increasing the parallel paths of a corresponding path when a load imbalance occurs.

[0007] The technical problems of the embodiments disclosed in the present application are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0008] A battery system according to one embodiment disclosed herein includes a battery connected via a first line that supplies current to a load and a second line that supplies additional current to the load, and a battery management device that manages the battery, wherein the battery management device can control the current supplied to the load via the first line and the second line based on the state of the load.

[0009] In one embodiment, the battery management device can supply current to the load via the first line when the load is in use. In one embodiment, when an imbalance occurs in the load, the battery management unit may supply current through the first line and additionally supply current through the second line.

[0010] In one embodiment, the first line includes a first switch, the second line includes a second switch and a third switch, and the battery management device controls the first switch, the second switch, and the third switch to control the maximum value of the current supplied to the load.

[0011] In one embodiment, the battery management unit can make the first switch conductive and the second switch and the third switch open when the load is used.

[0012] In one embodiment, the battery management unit may turn on the first switch, the second switch, and the third switch when an imbalance occurs in the load. In one embodiment, a cutoff control element may be disposed in the second line, and the first line and the second line may be designed for redundancy.

[0013] A battery management system according to one embodiment disclosed in the present application includes a plurality of batteries connected in parallel via a plurality of first lines that supply current to a plurality of loads and a plurality of second lines that supply additional current to the plurality of loads, and a plurality of battery management devices that manage each of the plurality of batteries, wherein a first battery management device among the plurality of battery management devices can control the current supplied to the first load via the first line corresponding to the first battery management device and the second line corresponding to the first battery management device based on the state of the first load corresponding to the first battery management device.

[0014] In one embodiment, the first battery management unit may supply current through a first line corresponding to the first battery management unit when the state of the first load is normal.

[0015] In one embodiment, when an imbalance occurs in the first load, the first battery management unit may supply current through a first line corresponding to the first battery management unit and additionally supply current through a second line corresponding to the first battery management unit.

[0016] In one embodiment, the plurality of first lines include a plurality of first switches, the plurality of second lines include a plurality of second switches and a plurality of third switches, and the first battery management device controls the first switch corresponding to the first battery management device, the second switch corresponding to the first battery management device, and the third switch corresponding to the first battery management device, and can control the maximum value of the magnitude of the current supplied to the first load.

[0017] In one embodiment, when the load is used, the first battery management device can turn on a first switch corresponding to the first battery management device, and can open a second switch corresponding to the first battery management device and a third switch corresponding to the first battery management device.

[0018] In one embodiment, when an imbalance occurs in the first load, the first battery management device can turn on a first switch corresponding to the first battery management device, a second switch corresponding to the first battery management device, and a third switch corresponding to the first battery management device.

[0019] In one embodiment, when an imbalance occurs in at least one of the plurality of loads, the plurality of battery management devices can turn on the plurality of second switches and turn on a third switch corresponding to the load in which the imbalance occurs.

[0020] In one embodiment, the battery management device further includes a plurality of current sensors that measure currents flowing through a plurality of loads, and the plurality of battery management devices can determine an imbalance in the plurality of loads based on the currents measured by the plurality of current sensors. In an embodiment, the plurality of second lines may be provided with cut-off control elements.

[0021] A battery management method according to one embodiment disclosed herein includes the steps of checking the state of a first load corresponding to a first battery management device, and controlling a current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device, wherein the first battery management device is one of a plurality of battery management devices that manages each of a plurality of batteries, and the plurality of batteries can be connected in parallel via a plurality of first lines that supply current to the plurality of loads and a plurality of second lines that supply additional current to the plurality of loads.

[0022] In one embodiment, the step of controlling the current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device may include the step of supplying current via the first line corresponding to the first battery management device when the state of the first load is normal.

[0023] In one embodiment, the step of controlling the current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device may include the step of supplying additional current via the second line corresponding to the first battery management device when an imbalance occurs in the first load.

[0024] In one embodiment, the step of controlling the current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device includes controlling a first switch corresponding to the first battery management device, a second switch corresponding to the first battery management device, and a third switch corresponding to the first battery management device to control a maximum value of the magnitude of the current supplied to the first load, wherein the plurality of first lines include a plurality of first switches, and the plurality of second lines include a plurality of second switches and a plurality of third switches. [Effects of the Invention]

[0025] The battery system, battery management system, and battery management method according to an embodiment disclosed herein can control the parallel paths connected to the path where the imbalance occurs to supply additional current when a load imbalance occurs in the electric propulsion system.

[0026] The battery system, battery management system, and battery management method according to an embodiment disclosed herein make the battery output lines redundant, and basically expand the maximum power according to the current capacity of the connected parallel paths, thereby quickly eliminating imbalances in the acceleration force and drive load of the propulsion system.

[0027] The battery system, battery management system, and battery management method according to an embodiment disclosed herein can extend the life of electrical equipment by reducing the rated current of high-voltage electrical equipment. In addition, the present invention can provide various other effects that can be directly or indirectly grasped. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a diagram illustrating a battery system according to one embodiment disclosed herein. [Figure 2] 1 is a block diagram illustrating a battery management system according to an embodiment disclosed herein. [Figure 3] 1 is a diagram specifically illustrating a battery management system according to an embodiment disclosed herein; [Figure 4] FIG. 1 illustrates an example of a load coupled to a battery management system according to an embodiment disclosed herein. [Figure 5] 1 is a flowchart illustrating a battery management method according to one embodiment disclosed herein. [Figure 6] 1 is a flowchart specifically illustrating a battery management method according to an embodiment of the present disclosure. [Figure 7] FIG. 1 is a block diagram showing the hardware configuration of a computing system for performing a battery management method according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, the embodiments disclosed herein will be described in detail with reference to the accompanying drawings. It should be noted that when assigning reference numerals to components in each drawing, the same numerals are assigned to the same components when they appear in other drawings as much as possible. Furthermore, when describing the embodiments disclosed herein, if a detailed description of related known structures or functions is deemed to hinder understanding of the embodiments disclosed herein, such detailed description will be omitted.

[0030] When describing components of the embodiments disclosed herein, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. Such terms are merely used to distinguish the component from other components and do not limit the nature, order, or sequence of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments disclosed herein belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0031] FIG. 1 is a diagram illustrating a battery system according to one embodiment disclosed in the present application. Referring to FIG. 1, a battery system 10 according to one embodiment disclosed herein may include a battery 11 and a battery management device 12 .

[0032] The battery 11 can supply current to the load 20. For example, the battery 11 can supply current to the load 20 via a first line 30 and can supply additional current to the load 20 via a second line 40.

[0033] The battery management unit 12 can manage the battery 11. For example, the battery management unit 12 can control the current supplied to the load 20 via the first line 30 and the second line 40 based on the state of the load 20. According to an embodiment, the battery management unit 12 can control the maximum value of the current supplied to the load 20 via the first line 30 and the second line 40 based on the state of the load 20.

[0034] When the load 20 is used, the battery management unit 12 can supply current to the load 20 via the first line 30. For example, when a sufficient amount of current is supplied to the load 20 via the first line 30, the battery management unit 12 can not supply current to the load 20 via the second line 40.

[0035] When an imbalance occurs in the load 20, the battery management unit 12 can supply current through the first line 30 while additionally supplying current through the second line 40.

[0036] According to an embodiment, the first line 30 may include a first switch 50. Also, the second line 40 may include a second switch 60 and a third switch 70.

[0037] The battery management unit 12 controls the first switch 50, the second switch 60, and the third switch 70 to control the maximum value of the current supplied to the load 20. For example, when the load 20 is in use, the battery management unit 12 can turn on the first switch 50 and open the second switch 60 and the third switch 70. As another example, when an imbalance occurs in the load 20, the battery management unit 12 can turn on all of the first switch 50, the second switch 60, and the third switch 70 to supply current to the load 20 via the first line 30 and the second line 40.

[0038] According to an embodiment, a cutoff control element may be disposed in the second line 40. In this case, the first line 30 and the second line 40 may be designed for redundancy.

[0039] FIG. 2 is a block diagram illustrating a battery management system according to one embodiment disclosed herein. Referring to FIG. 2, a battery management system 100 according to one embodiment disclosed herein may include a plurality of batteries 110 and a plurality of battery management units 120.

[0040] The plurality of batteries 110 can provide power to a load. For example, the plurality of batteries 110 can supply current to the plurality of loads. As another example, the plurality of batteries 110 can supply current to the plurality of loads via a first line and additional current via a second line. According to an embodiment, multiple batteries 110 may be connected in parallel with each other.

[0041] The plurality of battery management units 120 can manage the plurality of batteries 110, respectively. For example, each of the plurality of battery management units 120 can monitor the voltage, current, temperature, etc. of the plurality of batteries 110 and control and manage the batteries 110 to prevent overcharging and overdischarging. As another example, each of the plurality of battery management units 120 is an interface that receives input of measured values ​​of the various parameters described above of the plurality of batteries 110, and can include a plurality of terminals and a circuit connected to these terminals for processing the input values. Furthermore, the plurality of battery management units 120 can control the ON / OFF of switches (e.g., relays or contactors), and can be connected to the plurality of batteries 110 to monitor the status of each of the plurality of batteries 110.

[0042] According to an embodiment, one of the plurality of battery management units 120 may be a master battery management unit, and the remaining battery management units may be slave battery management units. In this case, the master battery management unit can control the slave battery management units.

[0043] According to the embodiment, the battery management units 120 may control the current supplied to the loads. For example, the battery management units 120 may control the maximum value of the current supplied to the loads. As another example, the battery management units 120 may control whether the current supplied from the batteries 110 to the loads is supplied to a first line or a second line.

[0044] FIG. 3 is a diagram specifically illustrating a battery management system according to an embodiment disclosed in the present application. Referring to FIG. 3, a battery management system 100 according to one embodiment disclosed herein may include a plurality of batteries 111, 112, 113, 114 and a plurality of battery management units 121, 122, 123, 124.

[0045] According to an embodiment, the plurality of batteries 111, 112, 113, and 114 may be included in the plurality of batteries 110 of Fig. 2, and the plurality of battery management devices 121, 122, 123, and 124 may be included in the plurality of battery management devices 120 of Fig. 2. Although four batteries and four battery management devices are shown in Fig. 3, this is not limiting, and each of the plurality of batteries 110 and the plurality of battery management devices 120 may include n batteries (n is a natural number greater than or equal to 2) and n battery management devices.

[0046] According to the embodiment, each of the plurality of battery management units 120 can manage a plurality of batteries 110. For example, the first battery management unit 121 can manage the first battery 111, the second battery management unit 122 can manage the second battery 112, the third battery management unit 123 can manage the third battery 113, and the fourth battery management unit 124 can manage the fourth battery 114.

[0047] The plurality of loads 210 may include a plurality of loads. For example, the plurality of loads 210 may include a first load 211, a second load 212, a third load 213, and a fourth load 214.

[0048] The plurality of batteries 111, 112, 113, and 114 may be connected to the plurality of loads 210. For example, the plurality of batteries 110 may be connected in parallel to the plurality of loads 210. As another example, the plurality of batteries 110 may supply current to the plurality of loads 210 via the plurality of first lines 220 and supply additional current to the plurality of loads 210 via the plurality of second lines 230. According to an embodiment, the plurality of batteries 110 may be connected in parallel via the plurality of first lines 220 and the plurality of second lines 230.

[0049] According to the embodiment, a cutoff control element may be disposed in the plurality of second lines. As another example, a cutoff control element may also be disposed in the plurality of first lines. That is, the battery management system 100 may provide a redundant design for the output terminals of the plurality of batteries 110, and thus may transmit the outputs of the plurality of batteries 110 to the plurality of loads 210 via the first and second lines.

[0050] The plurality of first lines 220 may include a plurality of first switches 240. For example, the plurality of batteries 110 and the plurality of loads 210 may be connected to the plurality of first lines 220 via the plurality of first switches 240. According to an embodiment, the plurality of first switches 240 may be controlled by the plurality of battery management units 120. For example, the first battery management unit 121 may control the first switch connected to the first battery 111.

[0051] The plurality of second lines 230 may include a plurality of second switches 250 and a plurality of third switches 260. For example, the plurality of batteries 110 and the plurality of loads 210 may be coupled to the plurality of second lines 230 via the plurality of second switches 250 and the plurality of third switches 260. According to an embodiment, the plurality of second switches 250 and the plurality of third switches 260 may be controlled by the plurality of battery management units 120. For example, the first battery management unit 121 may control the second switch and the third switch coupled to the first battery 111.

[0052] Among the plurality of battery management devices 120, a first battery management device 121 can check the state of a first load 211 corresponding to the first battery management device 121. Furthermore, the first battery management device 121 can control the maximum value of the magnitude of the current supplied to the first load 211 via a first line corresponding to the first battery management device 121 and a second line corresponding to the first battery management device 121, based on the state of the first load 211.

[0053] According to the embodiment, each of the multiple battery management units 120 can control the maximum value of the current supplied to the load via the first line and the second line corresponding to the respective battery management unit based on the state of the corresponding load. That is, not only the first battery management unit 121 but also the other battery management units can control the maximum value of the current supplied to the load. For convenience of explanation, the present application will describe an example in which the first battery management unit 121 controls the maximum value of the current supplied to the first load 211 based on the state of the first load 211.

[0054] When the state of the first load 211 is normal, the first battery management unit 121 can supply current through a first line corresponding to the first battery management unit 121. For example, when the first load 211 is used, the first battery management unit 121 can supply current to the first load 211 through the first line.

[0055] According to an embodiment, the voltage supplied from the plurality of batteries 110 to the plurality of loads 210 may be a three-phase voltage. When a phenomenon occurs in which loads are concentrated on the plurality of loads 210 (e.g., when the rotation speed of a motor increases, when the motor moves forward, when the motor changes direction, etc.), the voltage switching speed must be increased, and when the switching speed is increased, a larger current must be supplied. Furthermore, since the amount of current that can flow through each line connected to the load is limited, the load must be connected to more lines to receive a larger current. In other words, if a load requires an instantaneous overcurrent, the battery must supply current to the load through more lines because it cannot supply the required amount of current if it is connected to only one line.

[0056] When an imbalance occurs in the first load 211, the first battery management unit 121 can supply current through a first line corresponding to the first battery management unit 121 and additionally supply current through a second line corresponding to the first battery management unit 121. For example, when the first load 211 is used, the first battery management unit 121 can control a first switch corresponding to the first battery management unit 121 to be conductive and supply current to the first load 211 through the first line. Furthermore, when it is determined that an imbalance occurs in the first load 211, the first battery management unit 121 can control a second switch and a third switch corresponding to the first battery management unit 121 to be conductive and supply additional current to the first load 211 through the second line.

[0057] That is, the first battery management unit 121 can control a first switch corresponding to the first battery management unit 121, a second switch corresponding to the first battery management unit 121, and a third switch corresponding to the first battery management unit 121, and can control the maximum value of the magnitude of the current supplied to the first load 211. For example, when a load is used, the first battery management unit 121 can turn on the first switch corresponding to the first battery management unit 121 and can turn off the second switch and the third switch corresponding to the first battery management unit 121. Furthermore, when an imbalance occurs in the first load 211, the first battery management unit 121 can turn on the first switch, the second switch, and the third switch corresponding to the first battery management unit 121.

[0058] According to an embodiment, the plurality of battery management units 120 may conduct the plurality of first switches 240 to supply current through the plurality of first lines 220 when the plurality of loads 210 must be used.

[0059] According to the embodiment, when an imbalance occurs in at least one of the plurality of loads 210, the plurality of battery management units 120 can turn on the plurality of second switches 250 and turn on the third switch corresponding to the load where the imbalance occurs. That is, since the third switch corresponding to the load where the imbalance does not occur is open, the load where the imbalance occurs receives a larger current supply than the load where the imbalance does not occur, and the imbalance occurring in the load can be controlled.

[0060] According to an embodiment, one of the battery management units 120 (e.g., the first battery management unit 121) can function as a master battery management unit to control the other battery management units. For example, the master battery management unit can check the status of all loads, identify a load where an imbalance has occurred, and transmit a control signal to the battery management unit corresponding to the load where the imbalance has occurred to supply current via the second line.

[0061] When a load imbalance occurs in the electric propulsion system, the battery management system 100 according to one embodiment disclosed herein can increase the number of parallel paths connected to the path where the imbalance occurs, thereby controlling the system to supply additional current.

[0062] The battery management system 100 according to one embodiment disclosed herein makes the battery output lines redundant, and basically expands the maximum power based on the current capacity of the connected parallel paths, thereby quickly eliminating imbalances in acceleration force and drive load of the propulsion system.

[0063] The battery management system 100 according to the embodiment disclosed in the present application can extend the life of electrical equipment by reducing the rated current of high-voltage electrical equipment.

[0064] FIG. 4 is a diagram illustrating an example of a load coupled to a battery management system according to one embodiment disclosed herein. The load 300 coupled to the battery management system 100 according to an embodiment disclosed herein may include a motor 310, a current sensor 320, and an inverter 330. According to an embodiment, the load 300 may further include a converter (not shown). According to an embodiment, the motor 310 is not limited to a motor, but may include any type of device that can be supplied with current and control the mobility of a device to which the battery management system 100 is attached. According to an embodiment, the plurality of loads 210 shown in FIG. 3 may include the load 300.

[0065] The current sensor 320 may measure the magnitude of the current supplied to the motor 310. For example, the current sensor 320 may transmit the measured magnitude of the current to a battery management unit corresponding to the load 300. In this case, the battery management unit corresponding to the load 300 may determine whether an imbalance has occurred in the load based on the measured current.

[0066] FIG. 5 is a flowchart illustrating a battery management method according to one embodiment disclosed herein. According to an embodiment, the operations shown in FIG. 5 may be performed via any one of the battery management units 120 in FIG. 3 (for example, the first battery management unit 121).

[0067] Referring to FIG. 5, the battery management method disclosed in the present application may include a step (S110) of checking the state of a first load corresponding to a first battery management device, and a step (S120) of controlling the current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device.

[0068] According to an embodiment, the first battery management device 121 may be one of a plurality of battery management devices 120 that manage each of a plurality of batteries 110, and the plurality of batteries 110 may be connected in parallel via a plurality of first lines 220 that supply current to a plurality of loads 210 and a plurality of second lines 230 that supply additional current to the plurality of loads 210.

[0069] In step S110, the first battery management unit 121 can check the state of the first load 211 corresponding to the first battery management unit 121. For example, the first battery management unit 121 can check whether an imbalance has occurred in the first load 211 based on the current flowing through the first load 211.

[0070] In step S120, the first battery management unit 121 can control the maximum value of the magnitude of the current supplied to the first load 211 via the first line corresponding to the first battery management unit 121 and the second line corresponding to the first battery management unit 121. For example, the first battery management unit 121 can control the maximum value of the magnitude of the current supplied to the first load 211 by controlling a first switch corresponding to the first battery management unit 121, a second switch corresponding to the first battery management unit 121, and a third switch corresponding to the first battery management unit 121. According to an embodiment, the plurality of first lines includes a plurality of first switches, and the plurality of second lines includes a second switch and a third switch.

[0071] FIG. 6 is a flowchart specifically illustrating a battery management method according to an embodiment disclosed herein. According to an embodiment, the operations shown in FIG. 6 may be performed via any one of the battery management units 120 in FIG. 3 (for example, the first battery management unit 121).

[0072] Referring to FIG. 6, a battery management method according to one embodiment disclosed herein may include a step of supplying current through a first line corresponding to a first battery management device (S210), a step of checking whether an imbalance has occurred in the first load (S220), and a step of additionally supplying current through a second line corresponding to the first battery management device if an imbalance has occurred in the first load (S230).

[0073] In step S210, when the first load 211 is used, the first battery management unit 121 can supply current through the first line corresponding to the first battery management unit 121.

[0074] In step S220, the first battery management unit 121 may determine whether an imbalance has occurred in the first load 211. For example, the first battery management unit 121 may determine whether an overcurrent should be input to the first load 211 based on the current flowing through the first load 211.

[0075] In step S230, if an imbalance occurs in the first load 211, the first battery management unit 121 can supply additional current through the second line corresponding to the first battery management unit 121.

[0076] According to the embodiment, when no imbalance occurs in the first load 211, the first battery management unit 121 can supply current to the first load 211 only via the first line.

[0077] FIG. 7 is a block diagram showing the hardware configuration of a computing system for performing a battery management method according to an embodiment of the present disclosure. Referring to FIG. 7, a computing system 1000 according to one embodiment disclosed herein may include an MCU (microcontroller unit) 1010, a memory 1020, an input / output I / F (interface) 1030, and a communication I / F (interface) 1040.

[0078] The MCU 1010 may be a processor that executes various programs (e.g., a load current measurement program, a battery voltage collection program, a load imbalance determination program, a relay control program, etc.) stored in the memory 1020, processes various information including the current supplied to the load, whether or not a load imbalance has occurred, whether or not additional current is being supplied, etc. through such programs, and performs the functions of the battery management device included in the battery management system shown in Figure 3 described above.

[0079] The memory 1020 may store various programs such as a load current measurement program, a battery voltage collection program, a load imbalance occurrence determination program, a relay control program, etc. The memory 1020 may also store various information such as the current supplied to the load, whether or not a load imbalance has occurred, and whether or not additional current is being supplied.

[0080] A plurality of such memories 1020 may be provided as necessary. The memories 1020 may be volatile memories or nonvolatile memories. As the volatile memories 1020, RAM, DRAM, SRAM, etc. may be used. As the nonvolatile memories 1020, ROM, PROM, EAROM, EPROM, EEPROM, flash memory, etc. may be used. The examples of the memories 1020 listed above are merely illustrative and are not limited to these examples.

[0081] The input / output I / F 1030 can provide an interface that connects input devices (not shown) such as a keyboard, mouse, or touch panel, and output devices such as a display (not shown), to the MCU 1010, enabling data to be sent and received.

[0082] The communication I / F 1040 is configured to be able to send and receive various data to and from a server, and may be any of various devices that support wired or wireless communication. For example, the battery management system can send and receive information such as the current supplied to various loads, whether a load imbalance has occurred, and whether additional current is being supplied from a separately provided external server via the communication I / F 1040.

[0083] In this way, the computer program according to one embodiment disclosed in the present application may be recorded in memory 1020 and processed by MCU 1010, thereby realizing, for example, a module that performs each function of the battery management device shown in FIG. 3.

[0084] The above description is merely an illustrative example of the technical ideas disclosed in the present application, and a person having ordinary skill in the art to which the embodiments disclosed in the present application belong may make various modifications and variations within the scope that does not deviate from the essential characteristics of the embodiments disclosed in the present application.

[0085] Therefore, the embodiments disclosed in this application are intended to illustrate, not limit, the technical ideas disclosed in this application, and the scope of the technical ideas disclosed in this application is not limited by such embodiments. The scope of protection of the technical ideas disclosed in this application is to be interpreted by the scope of the claims below, and all technical ideas within the scope equivalent thereto are to be interpreted as being included in the scope of rights of this application.

Claims

1. a battery connected via a first line for supplying current to a load and a second line for supplying additional current to the load; a battery management device that manages the battery, The battery management device controls the current supplied to the load via the first line and the second line based on the state of the load.

2. The battery system according to claim 1 , wherein the battery management device supplies a current to the load via the first line when the load is used.

3. The battery system according to claim 1 , wherein the battery management device supplies current through the first line and additionally supplies current through the second line when an imbalance occurs in the loads.

4. the first line includes a first switch; the second line includes a second switch and a third switch; The battery system according to claim 1 , wherein the battery management device controls the first switch, the second switch, and the third switch to control a maximum value of the magnitude of the current supplied to the load.

5. The battery system according to claim 4 , wherein the battery management device makes the first switch conductive and the second switch and the third switch open when the load is used.

6. The battery system according to claim 4 , wherein the battery management device turns on the first switch, the second switch, and the third switch when an imbalance occurs in the loads.

7. a cutoff control element is disposed on the second line; The battery system according to claim 1 , wherein the first line and the second line are designed to be redundant.

8. a plurality of batteries connected in parallel via a plurality of first lines supplying current to a plurality of loads and a plurality of second lines supplying additional current to the plurality of loads; a plurality of battery management devices that manage the plurality of batteries, A battery management system in which a first battery management device among the plurality of battery management devices controls the current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device based on the state of the first load corresponding to the first battery management device.

9. The battery management system according to claim 8 , wherein the first battery management unit supplies a current through a first line corresponding to the first battery management unit when the state of the first load is normal.

10. the first battery management device, When an imbalance occurs in the first load, a current is supplied through a first line corresponding to the first battery management device, and The battery management system of claim 8 , further comprising: a second line corresponding to the first battery management device, the second line additionally supplying current thereto.

11. the plurality of first lines include a plurality of first switches; the plurality of second lines include a plurality of second switches and a plurality of third switches; 9. The battery management system of claim 8, wherein the first battery management device controls a first switch corresponding to the first battery management device, a second switch corresponding to the first battery management device, and a third switch corresponding to the first battery management device, and controls a maximum value of the magnitude of the current supplied to the first load.

12. the first battery management device, When the load is used, a first switch corresponding to the first battery management device is turned on; The battery management system according to claim 11 , further comprising: opening a second switch corresponding to the first battery management unit and a third switch corresponding to the first battery management unit.

13. 12. The battery management system of claim 11, wherein when an imbalance occurs in the first load, the first battery management device turns on a first switch corresponding to the first battery management device, a second switch corresponding to the first battery management device, and a third switch corresponding to the first battery management device.

14. the plurality of battery management devices, When an imbalance occurs in at least one of the plurality of loads, the plurality of second switches are turned on; The battery management system according to claim 11, wherein the third switch corresponding to the load in which the imbalance occurs is turned on.

15. further comprising a plurality of current sensors for measuring currents flowing through the plurality of loads; The battery management system according to claim 8 , wherein the plurality of battery management devices determine an imbalance in the plurality of loads based on currents measured by the plurality of current sensors.

16. The battery management system according to claim 8 , wherein the plurality of second lines are provided with cutoff control elements.

17. checking the state of a first load corresponding to the first battery management device; controlling a current supplied to the first load via a first line corresponding to the first battery management unit and a second line corresponding to the first battery management unit; Including, the first battery management device is one of a plurality of battery management devices that manage a plurality of batteries, The battery management method, wherein the plurality of batteries are connected in parallel via a plurality of first lines that supply current to a plurality of loads and a plurality of second lines that supply additional current to the plurality of loads.

18. 18. The battery management method of claim 17, wherein the step of controlling the current supplied to the first load via a first line corresponding to the first battery management device and a second line corresponding to the first battery management device includes the step of supplying current via the first line corresponding to the first battery management device when a state of the first load is normal.

19. 18. The battery management method of claim 17, wherein the step of controlling the current supplied to the first load via the first line corresponding to the first battery management device and the second line corresponding to the first battery management device includes the step of supplying additional current via the second line corresponding to the first battery management device when an imbalance occurs in the first load.

20. The step of controlling the current supplied to the first load via the first line corresponding to the first battery management device and the second line corresponding to the first battery management device includes controlling a first switch corresponding to the first battery management device, a second switch corresponding to the first battery management device, and a third switch corresponding to the first battery management device to control a maximum value of the current supplied to the first load; the plurality of first lines include a plurality of first switches; The battery management method of claim 17 , wherein the second lines include a plurality of second switches and a plurality of third switches.

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