Battery system, battery management system and battery management method

Abstract

A battery system according to an embodiment disclosed herein includes a battery connected through a first line that supplies a current to a load and a second line that supplies an additional current to the load, and a battery management device that manages the battery, the battery management apparatus controls a current supplied to the load through the first line and the second line based on a state of the load.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0121947, filed on September 26, 2022, which is hereby incorporated by reference in its entirety. Technical Field

[0004] Embodiments disclosed herein relate to a battery system, a battery management system, and a battery management method. Background Art

[0005] In recent years, research and development of secondary batteries have been actively carried out. In this article, the secondary battery as a rechargeable / dischargeable battery can include all traditional nickel (Ni) / cadmium (Cd) batteries, nickel / metal hydride (MH) batteries, etc., and the recent lithium-ion batteries. Among the secondary batteries, lithium-ion batteries have an energy density much higher than that of traditional Ni / Cd batteries, Ni / MH batteries, etc. In addition, lithium-ion batteries can be made small and lightweight, so that lithium-ion batteries have been used as power sources for mobile devices, and in recent years their scope of use has been expanded to power sources for electric vehicles, attracting attention as the next generation of energy storage media.

[0006] In order to drive an electric propulsion system (e.g., an aircraft, a vehicle, a ship, etc.), in a system including an electric motor, an inverter, a converter, and a battery, the batteries may be connected in parallel to prevent loss of propulsion and control in an emergency. When the batteries are connected in parallel, in the event of a problem in one or some of the batteries, the problematic battery is removed from the power path to ensure the power stability of the entire system. However, in the case of an unbalanced load (e.g., rotation of an aircraft, etc.), the batteries connected in parallel may have difficulty obtaining as much power as desired due to current concentration on the load power path. Summary of the invention

[0007] Technical issues

[0008] The embodiments disclosed herein are intended to provide a battery system, a battery management system, and a battery management method that can output as much power as desired through additional current supply in the case of unbalanced load.

[0009] The embodiments disclosed herein are intended to provide a battery system, a battery management system, and a battery management method that can additionally supply current by adding parallel paths of corresponding paths in the case of load imbalance.

[0010] Technical problems of the embodiments disclosed herein are not limited to the above-mentioned technical problems, and other unmentioned technical problems will be clearly understood by ordinary technicians in the art from the following description.

[0011] Technical Solution

[0012] A battery system according to an embodiment disclosed herein includes: a battery connected via a first line for supplying current to a load and a second line for supplying additional current to the load; and a battery management device configured to manage the battery, wherein the battery management device is configured to control the current supplied to the load via the first line and the second line based on a state of the load.

[0013] In an embodiment, the battery management device may be further configured to supply current to the load through the first line when the load is in use.

[0014] In an embodiment, the battery management device may be further configured to: when an imbalance occurs in the load, additionally supply current through the second line while supplying current through the first line.

[0015] In an embodiment, the first circuit may include a first switch, the second circuit may include a second switch and a third switch, and the battery management device may be further configured to control a maximum value of the magnitude of the current supplied to the load by controlling the first switch, the second switch, and the third switch.

[0016] In an embodiment, the battery management device may be further configured to short-circuit the first switch and open the second switch and the third switch when the load is used.

[0017] In an embodiment, the battery management device may be further configured to short-circuit the first switch, the second switch, and the third switch when an imbalance occurs in the load.

[0018] In an embodiment, the cutoff control element may be arranged on the second line, and the first line and the second line may be designed to be duplicated.

[0019] A battery management system according to an embodiment disclosed herein includes: a plurality of batteries, the plurality of batteries being connected in parallel through a plurality of first circuits for supplying current to a plurality of loads and a plurality of second circuits for supplying additional current to the plurality of loads, and a plurality of battery management devices, the plurality of battery management devices being configured to manage each of the plurality of batteries, wherein a first battery management device among the plurality of battery management devices is configured to control the current supplied to the first load through a first circuit corresponding to the first battery management device and a second circuit corresponding to the first battery management device based on a state of the first load corresponding to the first battery management device.

[0020] In an embodiment, the first battery management device may be further configured to supply current through a first line corresponding to the first battery management device when the state of the first load is normal.

[0021] In an embodiment, the first battery management device may be further configured to: when an imbalance occurs in the first load, additionally supply current through a second line corresponding to the first battery management device while supplying current through a first line corresponding to the first battery management device.

[0022] In an embodiment, the plurality of first circuits may include a plurality of first switches, and the plurality of second circuits may include a plurality of second switches and a plurality of third switches, and the first battery management device may also be configured to control the maximum value of the magnitude of the current supplied to the first load by controlling 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.

[0023] In an embodiment, the first battery management device may be further configured to short-circuit a first switch corresponding to the first battery management device and open a second switch corresponding to the first battery management device and a third switch corresponding to the first battery management device when a load is used.

[0024] In an embodiment, the first battery management device may be further configured to short-circuit 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 when an imbalance occurs in the first load.

[0025] In an embodiment, the plurality of battery management devices may be further configured to: when an imbalance occurs in at least one load among the plurality of loads, short-circuit the plurality of second switches, and short-circuit a third switch corresponding to the load in which the imbalance occurs.

[0026] In an embodiment, a plurality of current sensors for measuring currents flowing through the plurality of loads are further included, wherein the plurality of battery management devices can determine an imbalance of the plurality of loads based on the currents measured by the plurality of current sensors.

[0027] In an embodiment, the cutoff control element may be arranged on a plurality of second lines.

[0028] A battery management method according to an embodiment disclosed herein includes: an operation of identifying a state of a first load corresponding to a first battery management device, and an operation of controlling a current supplied to the first load through a first circuit corresponding to the first battery management device and a second circuit corresponding to the first battery management device, wherein the first battery management device is one of a plurality of battery management devices that respectively manage a plurality of batteries, and the plurality of batteries can be connected in parallel through a plurality of first circuits that supply current to a plurality of loads and a plurality of second circuits that supply additional current to the plurality of loads.

[0029] In an embodiment, the operation of controlling the current supplied to the first load through the first line corresponding to the first battery management device and the second line corresponding to the first battery management device may include: when the state of the first load is normal, the operation of supplying current through the first line corresponding to the first battery management device.

[0030] In an embodiment, the operation of controlling the current supplied to the first load through the first line corresponding to the first battery management device and the second line corresponding to the first battery management device may include: when an imbalance occurs in the first load, the operation of additionally supplying current through the second line corresponding to the first battery management device.

[0031] In an embodiment, the operation of controlling the current supplied to the first load through the first circuit corresponding to the first battery management device and the second circuit corresponding to the first battery management device is: the maximum value of the magnitude of the current supplied to the first load is controlled by controlling 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, the multiple first circuits may include multiple first switches, and the multiple second circuits may include multiple second switches and multiple third switches.

[0032] Beneficial Effects

[0033] The battery system, the battery management system, and the battery management method according to the embodiments disclosed herein can control that, in the event of a load imbalance in an electric propulsion system, additional current can be supplied by adding a parallel path connected to the path where the imbalance occurs.

[0034] Utilizing the battery system, battery management system, and battery management method according to the embodiments disclosed herein, the output lines of the battery can be duplicated to expand the power maximum based on the current allowable value of the basically connected parallel paths, thereby quickly resolving the acceleration and driving load imbalance of the propulsion system.

[0035] By utilizing the battery system, battery management system, and battery management method according to the embodiments disclosed herein, the life of electronic products can be extended by reducing the effect of the rated current of high-voltage electrical equipment.

[0036] Furthermore, various effects directly or indirectly confirmed according to the present disclosure can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a diagram illustrating a battery system according to an embodiment disclosed herein.

[0038] Figure 2 is a block diagram of a battery management system according to an embodiment disclosed herein.

[0039] Figure 3 is a diagram illustrating in detail a battery management system according to an embodiment disclosed herein.

[0040] Figure 4 An example of a load connected to a battery management system according to an embodiment disclosed herein is shown.

[0041] Figure 5 is a flow chart illustrating a battery management method according to an embodiment disclosed herein.

[0042] Figure 6 is a flowchart illustrating in detail a battery management method according to an embodiment disclosed herein.

[0043] Figure 7 is a block diagram illustrating a hardware configuration of a computing system for executing a battery management method according to an embodiment disclosed herein. DETAILED DESCRIPTION

[0044] Hereinafter, the embodiments disclosed in this document will be described in detail with reference to the exemplary drawings. When adding reference numerals to the components of each drawing, it should be noted that even if the same components are indicated in different drawings, they are given the same reference numerals. In addition, when describing the embodiments disclosed in this document, when it is determined that the detailed description of the related known configuration or function interferes with the understanding of the embodiments disclosed in this document, its detailed description will be omitted.

[0045] In order to describe the components of the embodiments disclosed herein, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish one component from another component, and do not limit the components to the essence, sequence, order, etc. of the components. In addition, the terms used in this article, including technical terms and scientific terms, have the same meanings as those commonly understood by those skilled in the art, as long as the terms are not defined differently. Generally, terms defined in general dictionaries should be interpreted as having the same meanings as the contextual meanings of the relevant technology, and should not be interpreted as having ideal or exaggerated meanings unless they are clearly defined in this application.

[0046] Figure 1 is a diagram illustrating a battery system according to an embodiment disclosed herein.

[0047] Reference Figure 1 , a battery system 10 according to an embodiment disclosed herein may include a battery 11 and a battery management device 12 .

[0048] The battery 11 may supply current to the load 20. For example, the battery 11 may supply current to the load 20 through the first line 30, and may supply additional current to the load 20 through the second line 40.

[0049] The battery management device 12 can manage the battery 11. For example, the battery management device 12 can control the current supplied to the load 20 through the first line 30 and the second line 40 based on the state of the load 20. According to an embodiment, the battery management device 12 can control the maximum value of the magnitude of the current supplied to the load 20 through the first line 30 and the second line 40 based on the state of the load 20.

[0050] When the load 20 is used, the battery management device 12 may supply current to the load 20 through the first line 30. For example, when a sufficient amount of current is supplied to the load 20 through the first line 30, the battery management device 12 may not supply current to the load 20 through the second line 40.

[0051] In the event of an imbalance in the load 20 , the battery management device 12 may additionally supply current through the second line 40 while supplying current through the first line 30 .

[0052] According to an embodiment, the first line 30 may include a first switch 50. In addition, the second line 40 may include a second switch 60 and a third switch 70.

[0053] The battery management device 12 may control the first switch 50, the second switch 60, and the third switch 70 to control the maximum value of the magnitude of the current supplied to the load 20. For example, when the load 20 is used, the battery management device 12 may short-circuit the first switch 50 and open the second switch 60 and the third switch 70. In another example, when an imbalance occurs in the load 20, the battery management device 12 may short-circuit all of the first switch 50, the second switch 60, and the third switch 70 to supply current to the load 20 through the first line 30 and the second line 40.

[0054] According to the embodiment, a cutoff control element may be arranged on the second line 40. In this case, the first line 30 and the second line 40 may be designed to be duplicated.

[0055] Figure 2 is a block diagram of a battery management system according to an embodiment disclosed herein.

[0056] Reference Figure 2 , a battery system 100 according to an embodiment disclosed herein may include a plurality of batteries 110 and a plurality of battery management devices 120 .

[0057] The plurality of batteries 110 may provide power to the loads. For example, the plurality of batteries 110 may supply current to the plurality of loads. In another example, the plurality of batteries 1100 may supply current to the plurality of loads through a first line, and may supply additional current to the plurality of loads through a second line.

[0058] According to an embodiment, a plurality of batteries 110 may be connected to each other in parallel.

[0059] The plurality of battery management devices 120 may respectively manage the plurality of batteries 110. For example, the plurality of battery management devices 120 may respectively monitor the voltage, current, temperature, etc. of the plurality of batteries 110 to perform control and management to prevent overcharging and overdischarging, etc. In another embodiment, each of the plurality of battery management devices 120 as an interface for receiving the measurement values ​​of the aforementioned various parameters of the plurality of batteries 110 may include a plurality of terminals and a circuit connected to the terminals to process the received values, etc. In addition, the plurality of battery management devices 120 may control the on / off of a switch (e.g., a relay or a contactor), etc., and may be connected to the plurality of batteries 110 to monitor the state of each of the plurality of batteries 110.

[0060] According to an embodiment, any one of the plurality of battery management devices 120 may be a master battery management device, and the other battery management devices 120 may be slave battery management devices. In this case, the master battery management device may control the slave battery management devices.

[0061] According to an embodiment, the plurality of battery management devices 120 may control the current supplied to the plurality of loads. For example, the plurality of battery management devices 120 may control the maximum value of the current supplied to the plurality of loads. In another example, the plurality of battery management devices 120 may control which of the first circuit and the second circuit supplies the current from the plurality of batteries 110 to the plurality of loads.

[0062] Figure 3 is a diagram illustrating in detail a battery management system according to an embodiment disclosed herein.

[0063] Reference Figure 3 , a battery management system 100 according to an embodiment disclosed herein may include a plurality of batteries 111 , 112 , 113 , and 114 and a plurality of battery management devices 121 , 122 , 123 , and 124 .

[0064] According to an embodiment, the plurality of batteries 111, 112, 113, and 114 may be included in Figure 2 In the plurality of batteries 110, a plurality of battery management devices 121, 122, 123 and 124 may be included in Figure 2 In the multiple battery management devices 120. Figure 3 Four batteries and four battery management devices are shown in FIG. 1 , but the present invention is not limited thereto. The plurality of batteries 110 and the plurality of battery management devices 120 may include n (n is a natural number of 2 or greater) batteries and n battery management devices, respectively.

[0065] According to an embodiment, a plurality of battery management devices 120 may respectively manage a plurality of batteries 110. For example, a first battery management device 121 may manage a first battery 111, a second battery management device 122 may manage a second battery 112, a third battery management device 123 may manage a third battery 113, and a fourth battery management device 124 may manage a fourth battery 114.

[0066] 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 .

[0067] 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 with the plurality of loads 210. In another example, the plurality of batteries 110 may supply current to the plurality of loads 210 through the plurality of first lines 220, and may supply additional current to the plurality of loads 210 through the plurality of second lines 230. According to an embodiment, the plurality of batteries 110 may be connected in parallel through the plurality of first lines 220 and the plurality of second lines 230.

[0068] According to an embodiment, a cutoff control element may be arranged on the plurality of second lines. In another example, a cutoff control element may also be arranged on the plurality of first lines. That is, the battery management system 100 may design the output terminals of the plurality of batteries 110 to be doubled, and thus transmit the outputs of the plurality of batteries 110 to the plurality of loads 210 through the first line and the second line.

[0069] 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 through 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 devices 120, respectively. For example, the first battery management device 121 may control the first switch connected to the first battery 111.

[0070] The plurality of second lines 230 may include a plurality of second switches 250 and a plurality of third switches 260. For example, a plurality of batteries 110 and a plurality of loads 210 may be connected to the plurality of second lines 230 through a plurality of second switches 250 and a 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 a plurality of battery management devices 120, respectively. For example, the first battery management device 121 may control the second switch and the third switch connected to the first battery 111.

[0071] The first battery management device 121 among the plurality of battery management devices 120 may identify the state of the first load 211 corresponding to the first battery management device 121. In addition, the first battery management device 121 may control the maximum value of the magnitude of the current supplied to the first load 211 through the first line corresponding to the first battery management device 121 and the second line corresponding to the first battery management device 121 based on the state of the first load 211.

[0072] According to an embodiment, each of the plurality of battery management devices 120 may control the maximum value of the magnitude of the current supplied to the load through the first and second lines corresponding to each battery management device based on the state of the corresponding load. That is, not only the first battery management device 121 but also other battery management devices may control the maximum value of the magnitude of the current supplied to the load. Herein, for ease of description, an example will be described in which the first battery management device 121 controls the maximum value of the magnitude of the current supplied to the first load 211 based on the state of the first load 211.

[0073] When the state of the first load 211 is normal, the first battery management device 121 may supply current through a first line corresponding to the first battery management device 121. For example, when the first load 211 is used, the first battery management device 121 may supply current to the first load 211 through the first line.

[0074] 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, and when a phenomenon occurs in which the load is concentrated on the plurality of loads 210 (for example, when the rotation speed of the motor increases, moves forward, changes direction, etc.), the switching speed of the voltage needs to be increased, and more current may need to be supplied when the switching speed increases. In addition, since the amount of current that can flow through each line connected to the load is limited, more lines need to be connected to the load to supply more current. That is, when the load needs an overcurrent instantaneously, if only one line is connected, the required amount of current may not be supplied, so the battery may need to supply current to the load through more lines.

[0075] When an unbalance occurs in the first load 211, the first battery management device 121 may additionally supply current through a second line corresponding to the first battery management device 121 while supplying current through a first line corresponding to the first battery management device 121. For example, when the first load 211 is used, the first battery management device 121 may control a first switch corresponding to the first battery management device 121 to be short-circuited to supply current to the first load 211 through the first line. In addition, when it is determined that an unbalance occurs in the first load 211, the first battery management device 121 may control a second switch and a third switch corresponding to the first battery management device 121 to be short-circuited to additionally supply current to the first load 211 through the second line.

[0076] That is, the first battery management device 121 may control the first switch corresponding to the first battery management device 121, the second switch corresponding to the first battery management device 121, and the third switch corresponding to the first battery management device 121 to control the maximum value of the magnitude of the current supplied to the first load 211. For example, when the load is used, the first battery management device 121 may short-circuit the first switch corresponding to the first battery management device 121 and open the second switch and the third switch corresponding to the first battery management device 121. In addition, when an imbalance occurs in the first load 211, the first battery management device 121 may short-circuit the first switch, the second switch, and the third switch corresponding to the first battery management device 121.

[0077] According to an embodiment, when the plurality of battery management devices 120 must use the plurality of loads 210 , the plurality of battery management devices 120 may short-circuit the plurality of first switches 240 to supply current through the plurality of first lines 220 .

[0078] According to an embodiment, when an imbalance occurs in at least one load among the plurality of loads 210, the plurality of battery management devices 120 may short-circuit the plurality of second switches 250 and may short-circuit the third switch corresponding to the load in which the imbalance occurs. That is, since the third switch corresponding to the load in which the imbalance does not occur is opened, the load in which the imbalance occurs may be supplied with more current than the load in which the imbalance does not occur, so that the imbalance occurring in the load may be controlled.

[0079] According to an embodiment, any one of the plurality of battery management devices 120 (e.g., the first battery management device 121) may control other battery management devices as a master battery management device. For example, the master battery management device may identify the state of each load to identify an unbalanced load, and transmit a control signal for supplying current through the second line to the battery management device corresponding to the unbalanced load.

[0080] In the event of a load imbalance in the electric propulsion system, the battery management system 100 according to the embodiments disclosed herein may supply additional current by adding a parallel path connected to the path where the imbalance occurs.

[0081] The battery management system 100 according to the embodiment disclosed herein may duplicate the output lines of the battery to extend the power maximum value based on the current allowable value of the substantially connected parallel paths, thereby quickly resolving acceleration and driving load imbalance of the propulsion system.

[0082] The battery management system 100 according to the embodiment disclosed herein may extend the life of electronic products by reducing the effect of the rated current of high voltage electrical equipment.

[0083] Figure 4 An example of a load connected to a battery management system according to an embodiment disclosed herein is shown.

[0084] The load 300 connected to the battery management system 100 according to the embodiment disclosed herein may include a motor 310, a current sensor 320, and an inverter 330. According to the embodiment, the load 300 may further include a converter (not shown). According to the embodiment, the motor 310 is not limited to the motor, and the motor 310 may include any type of device capable of controlling the mobility of the device on which the battery management system 100 is mounted by being supplied with current. According to the embodiment, Figure 3The plurality of loads 210 shown in FIG. 2 may include a load 300 .

[0085] 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 magnitude of the measured current to a battery management device corresponding to the load 300. In this case, the battery management device corresponding to the load 300 may determine whether an imbalance occurs in the load based on the measured current.

[0086] Figure 5 is a flow chart illustrating a battery management method according to an embodiment disclosed herein.

[0087] According to an embodiment, Figure 5 The operations shown in FIG. 1 may be performed by any one of the plurality of battery management devices 120 (eg, the first battery management device 121 ).

[0088] Reference Figure 5 , the battery management method disclosed herein may include: operation S110, identifying a state of a first load corresponding to a first battery management device, and operation S120, controlling a current supplied to the first load through a first line corresponding to the first battery management device and a second line corresponding to the first battery management device.

[0089] According to an embodiment, the first battery management device 121 can be one battery management device among multiple battery management devices 120 that respectively manage multiple batteries 110, and the multiple batteries 110 can be connected in parallel through multiple first lines 220 that supply current to multiple loads 210 and multiple second lines 230 that supply additional current to the multiple loads 210.

[0090] In operation S110, the first battery management device 121 may identify a state of the first load 211 corresponding to the first battery management device 121. For example, the first battery management device 121 may identify whether an unbalance occurs in the first load 211 based on a current flowing through the first load 211.

[0091] In operation S120, the first battery management device 121 may control the maximum value of the magnitude of the current supplied to the first load 211 through the first line corresponding to the first battery management device 121 and the second line corresponding to the first battery management device 121. For example, the maximum value of the magnitude of the current supplied to the first load 211 may be controlled by controlling the first switch corresponding to the first battery management device 121, the second switch corresponding to the first battery management device 121, and the third switch corresponding to the first battery management device 121. According to an embodiment, the plurality of first lines may include a plurality of first switches, and the plurality of second lines may include a second switch and a third switch.

[0092] Figure 6 is a flowchart illustrating in detail a battery management method according to an embodiment disclosed herein.

[0093] According to an embodiment, Figure 6 The operations shown in can be performed by Figure 3 The method is performed by any one of the multiple battery management devices 120 (for example, the first battery management device 121).

[0094] Reference Figure 6 , a battery management method according to an embodiment disclosed herein may include: operation S210, supplying current through a first circuit corresponding to a first battery management device; operation S220, identifying whether an imbalance occurs in a first load; and operation S230, when an imbalance occurs in the first load, additionally supplying current through a second circuit corresponding to the first battery management device.

[0095] In operation S210 , when the first load 211 is used, the first battery management device 121 may supply current through a first line corresponding to the first battery management device 121 .

[0096] In operation S220, the first battery management device 121 may identify whether an unbalance occurs in the first load 211. For example, the first battery management device 121 may identify whether an overcurrent must be input to the first load 211 based on a current flowing through the first load 211.

[0097] In operation S230 , when an imbalance occurs in the first load 211 , the first battery management device 121 may supply an additional current through a second line corresponding to the first battery management device 121 .

[0098] According to an embodiment, when an imbalance does not occur in the first load 211 , the first battery management device 121 may supply current to the first load 211 only through the first line.

[0099] Figure 7 is a block diagram illustrating a hardware configuration of a computing system for executing a battery management method according to an embodiment disclosed herein.

[0100] Reference Figure 7 , the computing system 1000 according to the embodiments disclosed herein may include an MCU 1010 , a memory 1020 , an input / output I / F 1030 , and a communication I / F 1040 .

[0101] 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 a load imbalance occurs, whether an additional current is supplied, etc. through these programs, and executes various functions included in the Figure 3 The above functions of the battery management device in the battery management system shown in FIG.

[0102] The memory 1020 may store various programs such as a load current measurement program, a battery voltage collection program, a load imbalance determination program, a relay control program, etc. In addition, the memory 1020 may store various information such as current supplied to the load, whether load imbalance occurs, whether additional current is supplied, etc.

[0103] Such a memory 1020 may be provided in plural form as required. The memory 1020 may be a volatile memory or a non-volatile memory. For the memory 1020 as a volatile memory, a random access memory (RAM), a dynamic RAM (DRAM), a static RAM (SRAM), etc. may be used. For the memory 1020 as a non-volatile memory, a read-only memory (ROM), a programmable ROM (PROM), an electrically rewritable ROM (EAROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a flash memory, etc. may be used. The examples of the memory 1020 listed above are merely examples and are not limited thereto.

[0104] The input / output I / F 1030 may provide an interface for transmitting and receiving data by connecting an input device (not shown) such as a keyboard, a mouse, a touch panel, etc. and an output device such as a display (not shown) to the MCU 1010 .

[0105] The communication I / F 1040, which is a component capable of transmitting and receiving various data to and from the server, may be various devices capable of supporting wired or wireless communication. For example, the battery management device may transmit and receive information such as the current supplied to the load, whether load imbalance occurs, and whether additional current is supplied to and from a separately provided external server through the communication I / F 1040.

[0106] Therefore, the computer program according to the embodiment disclosed herein may be recorded in the memory 1020 and processed by the MCU 1010, thereby being implemented as an execution Figure 3 The functional modules of the battery management device shown.

[0107] The above description is only for illustrating the technical concept of the present disclosure, and a person skilled in the art to which the embodiments disclosed herein belong may make various modifications and changes without departing from the basic features of the embodiments of the present disclosure.

[0108] Therefore, the embodiments disclosed herein are intended to describe rather than limit the technical spirit of the embodiments disclosed herein, and the scope of the technical spirit of the present disclosure is not limited by these embodiments disclosed herein. The protection scope of the technical spirit disclosed herein should be interpreted by the attached claims, and all technical spirits within the same scope should be understood to be included in the scope of the present disclosure.

Claims

1. A battery system comprising: a battery connected via a first line supplying current to a load and a second line supplying additional current to the load; as well as a battery management device configured to manage the battery, The battery management device controls the current supplied to the load through 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 is further configured to supply current to the load through the first line when the load is in use.

3. The battery system according to claim 1, wherein: The battery management device is further configured to, when an imbalance occurs in the load, additionally supply current through the second line while supplying current through the first line.

4. The battery system according to claim 1, wherein: The first circuit includes a first switch, The second circuit includes a second switch and a third switch, and The battery management device is further configured to control a maximum value of a magnitude of a current supplied to the load by controlling the first switch, the second switch, and the third switch.

5. The battery system according to claim 4, wherein: The battery management device is further configured to short-circuit the first switch and open the second switch and the third switch when the load is used.

6. The battery system according to claim 4, wherein: The battery management device is further configured to short-circuit the first switch, the second switch, and the third switch when the imbalance occurs in the load.

7. The battery system according to claim 1, wherein: A cutoff control element is arranged on the second line, and the first line and the second line are designed to be duplicated.

8. A battery management system, comprising: a plurality of batteries connected in parallel via a plurality of first lines for supplying current to a plurality of loads and a plurality of second lines for supplying additional current to the plurality of loads; as well as a plurality of battery management devices configured to manage each of the plurality of batteries, Among them, a first battery management device among the multiple battery management devices is configured to control the current supplied to the first load through 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 device is further configured to supply current through a first line corresponding to the first battery management device when the state of the first load is normal.

10. The battery management system according to claim 8, wherein: The first battery management device is further configured to, when an imbalance occurs in the first load, additionally supply current through a second line corresponding to the first battery management device while supplying current through a first line corresponding to the first battery management device.

11. The battery management system according to claim 8, wherein: The plurality of first circuits include a plurality of first switches, and The plurality of second circuits include a plurality of second switches and a plurality of third switches, and The first battery management device is further configured to control a maximum value of a magnitude of current supplied to the first load by 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.

12. The battery management system according to claim 11, wherein: The first battery management device is further configured to, when using the load: short-circuiting a first switch corresponding to the first battery management device; and A second switch corresponding to the first battery management device and a third switch corresponding to the first battery management device are turned on.

13. The battery management system according to claim 11, wherein: The first battery management device is also configured to short-circuit 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 when an imbalance occurs in the first load.

14. The battery management system according to claim 11, wherein: The plurality of battery management devices are further configured to, when an imbalance occurs in at least one load among the plurality of loads: short-circuiting the plurality of second switches; and The third switch corresponding to the load where the imbalance occurs is short-circuited.

15. The battery management system according to claim 8, further comprising a plurality of current sensors configured to measure current flowing through a plurality of loads, in, The plurality of battery management devices are further configured to determine an imbalance of 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 cutoff control elements are arranged on the plurality of second lines.

17. A battery management method, comprising: an operation of identifying a state of a first load corresponding to a first battery management device; as well as controlling an operation of supplying a current to the first load through a first line corresponding to the first battery management device and a second line corresponding to the first battery management device, The first battery management device is one of a plurality of battery management devices that respectively manage a plurality of batteries, and The plurality of batteries are connected in parallel through 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. The battery management method according to claim 17, wherein: The operation of controlling the current supplied to the first load through the first line corresponding to the first battery management device and the second line corresponding to the first battery management device includes: when the state of the first load is normal, the operation of supplying current through the first line corresponding to the first battery management device.

19. The battery management method according to claim 17, wherein: The operation of controlling the current supplied to the first load through the first line corresponding to the first battery management device and the second line corresponding to the first battery management device includes: when an imbalance occurs in the first load, the operation of additionally supplying current through the second line corresponding to the first battery management device.

20. The battery management method according to claim 17, wherein: The operation of controlling the current supplied to the first load through the first line corresponding to the first battery management device and the second line corresponding to the first battery management device includes: controlling the maximum value of the magnitude of the current supplied to the first load by controlling 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 The plurality of first circuits include a plurality of first switches, and The plurality of second circuits include a plurality of second switches and a plurality of third switches.

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