Battery exchange system and operating method thereof

Abstract

A battery exchange system according to the present disclosure includes: a main controller configured to obtain a subject state of charge (SoC) of a subject battery pack and compare the subject SoC with a target SoC; a supplementary battery pack configured to receive and store power from the subject battery pack when the subject SoC exceeds the target SoC; and an impedance measurement device configured to measure an impedance of the subject battery pack when the subject SoC is the same as the target SoC.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0077855 filed in the Korean Intellectual Property Office on June 24, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments disclosed herein relate to a battery exchange system that provides a battery exchange service and an operating method of the battery exchange system. Background Art

[0004] Recently, research and development of secondary batteries have been actively carried out. Secondary batteries as rechargeable / dischargeable batteries may include all conventional nickel (Ni) / cadmium (Cd) batteries, nickel / metal hydride (MH) batteries, etc., and recent lithium-ion batteries. Lithium-ion batteries have a much higher energy density than conventional Ni / Cd batteries, Ni / MH batteries, etc. In addition, lithium-ion batteries can be made small and light, so that lithium-ion batteries have been used as power sources for mobile devices, and recently their scope of use has been expanded to power sources for electric vehicles, thereby attracting attention as a next-generation energy storage medium.

[0005] In order to analyze the state of a battery and detect the operating characteristics of the battery over time, electrochemical impedance spectroscopy may be used. Electrochemical impedance spectroscopy can quickly and accurately detect impedance, which is a factor that impedes power transmission when a chemical reaction occurs at an electrode included in a battery. By detecting the impedance of a battery, the state of the battery can be quickly evaluated, and based on the evaluation, the battery quality can be checked, the remaining life can be predicted, and the charging method corresponding to the battery state can be optimized.

[0006] Meanwhile, as interest and demand for electric mobility devices using large-capacity batteries such as electric vehicles increase, services that automatically replace exhausted batteries in a short period of time are attracting attention. Summary of the invention

[0007] [Technical issues]

[0008] The embodiments disclosed herein aim to provide a battery swap system and an operating method of the battery swap system that can improve energy efficiency.

[0009] 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 those of ordinary skill in the art from the following description.

[0010] [Technical solution]

[0011] A battery exchange system according to an embodiment of the present disclosure includes: a main controller configured to obtain an object state of charge (SoC) of an object battery pack and compare the object SoC with a target SoC; a supplementary battery pack configured to receive and store power from the object battery pack when the object SoC exceeds the target SoC; and an impedance measuring device configured to measure the impedance of the object battery pack when the object SoC is the same as the target SoC.

[0012] An operating method of a battery swap system according to an embodiment of the present disclosure includes: obtaining an object state of charge (SoC) of an object battery pack; comparing the object SoC with a target SoC; when the object SoC exceeds the target SoC, transmitting power from the object battery pack to a supplementary battery pack and storing the power in the supplementary battery pack; and when the object SoC is the same as the target SoC, measuring the impedance of the object battery pack.

[0013] [Beneficial Effects]

[0014] With the battery swap system and operating method thereof according to the present disclosure, the BSS autonomously and automatically sets the battery pack's SoC to the target SoC, thereby providing a battery swap service, without the user's time and effort to externally consume the battery to match the battery pack's SoC with the target SoC.

[0015] Furthermore, when the SoC of the battery pack is greater than the target SoC, the battery added in the BSS may be used to store surplus power, and the surplus power may be preferably used to charge the battery pack without wasting the surplus power, thereby improving power efficiency.

[0016] Furthermore, various effects directly or indirectly recognized from the present disclosure can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a block diagram of a battery management system according to an embodiment disclosed herein.

[0018] Figure 2 It is shown in detail Figure 1 A view of the BSS and battery station shown.

[0019] Figure 3 is a flowchart illustrating an example of an operation method of a BSS according to an embodiment of the present disclosure.

[0020] Figure 4 It is shown in detail Figure 3 A flowchart of operation S180 is shown.

[0021] Figure 5 is a block diagram illustrating a hardware configuration of a computing system for executing an operating method of a battery management system according to an embodiment disclosed herein. DETAILED DESCRIPTION

[0022] 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 the various drawings, it should be noted that the same components are given the same reference numerals even if they are indicated in different drawings. 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.

[0023] 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 component to the nature, order, sequence, etc. of the component. The terms used herein, including technical and scientific terms, have the same meaning as those commonly understood by those skilled in the art, as long as these terms are not defined differently. In general, terms defined in commonly used dictionaries should be interpreted as having the same meaning as the contextual meaning of the relevant field, and should not be interpreted as having an idealized or exaggerated meaning unless clearly defined in this application.

[0024] Figure 1 is a block diagram of a battery management system according to an embodiment disclosed herein.

[0025] See also Figure 1 , a battery management system 10 according to an embodiment disclosed herein may include a battery swap system (BSS) 100 and a battery station 200. The battery management system 10 may provide an overall management service for evaluation, measurement, charging, replacement, etc. of batteries, and in the present disclosure, the functions of the battery management system 10 will be described based on the battery swap service.

[0026] The battery exchange service may refer to a service that analyzes the state of a battery pack 50 as a service subject and replaces the battery pack 50 with another battery pack according to the analysis result. Such a replacement may be automatically performed by the settings of an administrator and / or a user. Here, the battery pack 50 may be a device installed on an object device (e.g., an electric vehicle such as an electric vehicle, an electric scooter, an electric bicycle, etc.) to supply power for driving the object device, and may include a battery for storing power and a battery management system (BMS) for controlling the operation of the battery. The battery may include at least one battery cell, at least one battery cell for storing power under the control of the BMS. The BMS may control the charging and discharging of the battery, and collect data as the basis for the state analysis of the battery, and transmit the data to the external device at the request of the external device.

[0027] The BSS 100 may be located in the battery station 200 to perform a status analysis on the battery pack 50 connected to the BSS 100, and replace the battery pack 50 with another battery pack or reuse (i.e., may not replace) the battery pack 50 based on the result of the status analysis. The BSS 100 may autonomously determine whether the status analysis and / or replacement of the battery pack 50 is required, but according to another embodiment, at least some operations may be performed in association with a server (e.g., a cloud server) connected through a network. For example, the BSS 100 may transmit information (e.g., EIS information to be described) as a basis for determining whether the battery pack needs to be replaced to the cloud server, and the cloud server may transmit information about whether the battery pack needs to be replaced to the BSS 100.

[0028] The battery station 200 may accommodate the battery pack 50 and physically control the battery pack 50 under the control of the BSS 100. According to an embodiment, the battery station 200 may detach the battery pack 50 mounted on the object device to connect it to the BSS 100 under the control of the BSS 100, and then install another battery pack on the object device to replace the battery pack 50, and move (i.e., replace) the battery pack 50 to a predetermined storage area in the battery station 200 or install (i.e., reuse) the battery pack 50 on the object device again under the control of the BSS 100. The storage area may be an area for temporarily storing the battery pack 50 classified as a replacement object.

[0029] Figure 2 It is shown in detail Figure 1 A view of a BSS 100 and a battery station 200 is shown.

[0030] refer to Figure 2 , the BSS 100 may include a main controller 110, an electrochemical impedance spectroscopy (EIS) device 120, an EIS device connection unit 125, a station controller 130, a supplementary battery pack 140, a first charger 150, and a second charger 160. Figure 2 2 shows that two battery packs 210 and 220 for receiving the battery exchange service are connected to the BSS 100, but the scope of the present disclosure is not limited thereto, and a random number (e.g., three or more) of battery packs for receiving the battery exchange service may be connected to the BSS 100. In this case, battery packs other than the battery packs 210 and 220 may be connected to the BSS 100 through a connection structure corresponding to the battery packs 210 and 220.

[0031] The main controller 110 may control the overall operation of the BSS 100, and specifically control the operation of each of the EIS device 120, the EIS device connection unit 125, the station controller 130, the supplementary battery pack 140, the first charger 150, and the second charger 160. The main controller 110 may receive state of charge (SoC) information of each of the first battery pack 210 and the second battery pack 220 connected to the BSS 100 from the corresponding battery pack. Here, the SoC information may indicate the current SoC of the corresponding battery pack, and the SoC may refer to the state of charge of the battery included in the battery pack, that is, the remaining capacity rate. The BMS of the corresponding battery pack may calculate the remaining capacity rate by dividing the current available capacity of the battery by the total capacity of the battery. For example, the remaining capacity rate may be calculated as a percentage. According to another embodiment, the main controller 110 may obtain the SoC information by directly calculating the remaining capacity rate of the battery of the battery pack without receiving the SoC information from the BMS of the battery pack.

[0032] The main controller 110 may perform a state analysis on the battery pack 210 and the battery pack 220 based on the EIS information generated by the EIS device 120, and determine whether the battery pack 210 and the battery pack 220 need to be replaced based on the result of the state analysis. The EIS information may be information indicating a result of estimating the degradation state and performance of the batteries of the battery pack 210 and the battery pack 220 by using EIS. For example, when the degradation rate and performance of the batteries of the battery pack 210 and the battery pack 220 are less than a reference level as a result of the state analysis performed based on the EIS information, the main controller 110 may determine that the battery pack 210 and the battery pack 220 need to be replaced. On the other hand, when the degradation rate and performance of the batteries of the battery pack 210 and the battery pack 220 are greater than or equal to the reference level as a result of the state analysis performed based on the EIS information, the main controller 110 may determine that the battery pack 210 and the battery pack 220 do not need to be replaced. In the present disclosure, a scheme for determining whether battery pack 210 and battery pack 220 need to be replaced based on EIS information will be described, but the scope of the present disclosure is not limited to this, and the main controller 110 can determine whether battery pack 210 and battery pack 220 need to be replaced using at least one information (for example, state of health (SoH) etc.) in addition to EIS information.

[0033] When the battery packs 210 and 220 need to be replaced, the main controller 110 may control the station controller 130 to move the battery packs 210 and 220 to a storage area and mount new battery packs on the target device.

[0034] When the battery pack 210 and the battery pack 220 do not need to be replaced, the main controller 110 may control the station controller 130 to mount the battery pack 210 and the battery pack 220 on the object device again.

[0035] The EIS device 120 can measure the impedance of the batteries of the battery pack 210 and the battery pack 220, calculate the impedance spectrum of the battery based on the measured impedance, and compare the calculated impedance spectrum of the battery with the equivalent circuit of the battery pack to estimate the degradation rate and performance of the battery, thereby generating EIS information. According to an embodiment, the scheme for measuring the impedance of the battery can apply an input AC voltage while changing the frequency and analyze the output AC voltage received from the battery to calculate the impedance. Although Figure 2 , one signal line connected between the EIS device 120 and the battery packs 210 and 220 is shown, but this may be a concept including a plurality of signal lines (input power line, output power line, control signal line, etc.) for impedance measurement.

[0036] The EIS device 120 may also be referred to as an impedance measurement device. An operation of the EIS device 120 to generate EIS information of the batteries of the battery pack 210 and the battery pack 220 may be defined as an EIS measurement operation.

[0037] The EIS device connection unit 125 may perform electrical connection or separation between the EIS device 120 and the battery pack 210 and the battery pack 220 under the control of the main controller 110. According to an embodiment, the EIS device connection unit 125 may include a third switch SW3 connected between the EIS device 120 and the battery pack 210 to electrically connect the EIS device 120 and the battery pack 210 to each other or to electrically separate the EIS device 120 and the battery pack 210 from each other, and a fourth switch SW4 connected between the EIS device 120 and the battery pack 220 to electrically connect the EIS device 120 and the battery pack 220 to each other or to electrically separate the EIS device 120 and the battery pack 220 from each other.

[0038] The station controller 130 may control the battery station 200 under the control of the main controller 110 to control the electrical connection and separation of each of the battery packs 210 and the battery packs 220 accommodated in the battery station 200 and the movement between predefined areas in the battery station 200. For example, the movement between the predefined areas may be controlled by opening or closing a door installed between the predefined areas, and the station controller 130 may control the movement of each of the battery packs 210 and the battery packs 220 by controlling each of a plurality of doors of the battery station 200. The station controller 130 may perform physical control of replacement or reuse of each of the battery packs 210 and the battery packs 220 according to the result of determining whether each of the battery packs 210 and the battery packs 220 needs to be replaced by the main controller 110.

[0039] The supplementary battery system 140 may include a battery 145 and a battery connection unit 147. The supplementary battery pack 140 may include internal components corresponding to each of the battery packs 210 and 220, and correspondingly include a BMS (not shown) for controlling the operation of the battery 145. The battery connection unit 147 may be implemented as a part of the BMS, but may be a component independent of the BMS, but the scope of the present disclosure is not limited thereto.

[0040] The battery 145 may be connected to each of the battery packs 210 and 220 to receive and store power from each of the battery packs 210 and 220 for discharge of each of the battery packs 210 and 220, and to transfer the stored power to each of the battery packs 210 and 220 to charge each of the battery packs 210 and 220. The charging and discharging operations of the battery 145 connected to each of the battery packs 210 and 220 may be performed to match the SoC of each of the battery packs 210 and 220 to the target SoC. That is, when the SoC of the battery pack is higher than the target SoC, power may be transferred from the battery of the battery pack to the battery 145. When the SoC of the battery pack is lower than the target SoC, power may be transferred from the battery 145 to the battery of the battery pack. The main controller 110 may dynamically control the charging and discharging operations of the battery 145 based on the SoC information of the battery 145.

[0041] Meanwhile, power of the battery 145 received from the battery pack 210 and stored for discharging any one battery pack (eg, 210 ) may be transmitted to charge another battery (eg, 220 ) of the battery pack 210 .

[0042] In order for the EIS device 120 to obtain accurate EIS information of the battery pack, the battery pack may need to have a specific target SoC. That is, the EIS information may vary depending on the SoC of the battery pack, so that in order for the EIS information to accurately indicate the degradation state and performance of the battery, it is necessary to perform impedance measurement and EIS information generation on the battery pack under the condition that the SoC of the battery pack is equal to the predefined target SoC. For example, the target SoC may be 50%, but the scope of the present disclosure is not limited thereto.

[0043] The battery connection unit 147 may perform electrical connection or separation between the battery 145 and the battery pack 210 and the battery pack 220 under the control of the main controller 110. According to an embodiment, the battery connection unit 147 may include a first switch SW1 connected between the battery 145 and the battery pack 210 to electrically connect the battery 145 and the battery pack 210 to each other or to electrically separate the battery 145 and the battery pack 210 from each other, and a second switch SW2 connected between the battery 145 and the battery pack 220 to electrically connect the battery 145 and the battery pack 220 to each other or to electrically separate the battery 145 and the battery pack 220 from each other.

[0044] The first charger 150 may charge the first battery pack 210 under the control of the main controller 110. The first charger 150 may receive power from an external commercial power source, convert it into a power form that can be received by the first battery pack 210, and supply power to the first battery pack 210. According to an embodiment, the first charger 150 may supply power until the SoC of the first battery pack 210 reaches 100% so as to fully charge the first battery pack 210.

[0045] The second charger 160 may charge the second battery pack 220 under the control of the main controller 110. The second charger 160 may receive power from an external commercial power source, convert it into a power form that can be received by the second battery pack 220, and supply power to the second battery pack 220. According to an embodiment, the second charger 160 may supply power until the SoC of the second battery pack 220 reaches 100% so as to fully charge the second battery pack 220.

[0046] Figure 3 is a flowchart illustrating an example of an operation method of the BSS 100 according to an embodiment of the present disclosure. Figure 4 It is shown in detail Figure 3 A flowchart of operation S180 is shown.

[0047] Figure 3 and Figure 4 A flowchart showing an operation of performing EIS measurement and charging on a target battery pack before determining whether the target battery pack needs to be replaced or reused. Here, the target battery pack may refer to a battery pack that is a target of a battery exchange service, and, for example, the target battery pack may correspond to Figure 2 The first battery pack 210 or the second battery pack 220.

[0048] In operation S100 , the main controller 110 may obtain a subject SoC of a subject battery pack and compare the subject SoC of the subject battery pack with a target SoC.

[0049] When the object SoC of the object battery pack is equal to the target SoC (equal in operation S100), operation S125 may be performed. Here, "equal" may be a concept that includes not only a complete physical match, but also a case where the object SoC of the object battery pack falls within a specific range around the target SoC. Similarly, "exceeds" may mean a case where it is greater than an upper limit of the target SoC by a predetermined value, and "less than" may mean a case where it is less than a lower limit of the target SoC by a predetermined value. According to an embodiment, the specific range may be a range greater than or equal to a lower limit and less than or equal to an upper limit.

[0050] When the target SoC of the target battery pack exceeds the target SoC (exceeded in operation S100), the main controller 110 may control the supplementary battery pack 140 to transfer power from the target battery pack to the supplementary battery pack 140, thereby charging the supplementary battery pack 140. For example, when the target battery pack is the first battery pack 210, the main controller 110 may short-circuit the first switch SW1 to charge the supplementary battery pack 140.

[0051] In operation S120, the main controller 110 may obtain the object SoC of the object battery pack again and determine whether the object SoC of the object battery pack is the same as the target SoC. According to an embodiment, operation S120 may be performed according to a predefined cycle.

[0052] When the object SoC of the object battery pack is not equal to the target SoC (No in operation S120 ), operations S110 and S120 may be repeatedly performed again.

[0053] When the object SoC of the object battery pack is equal to the target SoC (Yes in operation S100), the main controller 110 may control the supplementary battery pack 140 to electrically separate the object battery pack from the supplementary battery pack 140 to prevent power transmission, thereby stopping the charging of the supplementary battery pack 140. For example, when the object battery pack is the first battery pack 210, the main controller 110 may turn off the first switch SW1.

[0054] In operation S125, when the object SoC of the object battery pack is equal to the target SoC, the EIS measurement of the object battery pack may not be performed immediately, but may be performed after a power supply device (i.e., a supplementary battery pack or the object battery pack) electrically connected to the object battery pack is electrically separated from the object battery pack and a preset idle time has passed.

[0055] When the main controller 110 recognizes that the preset idle time has passed from determining that the object SoC is equal to the target SoC, the main controller 110 can control the EIS 120 to perform EIS measurement on the object battery pack. For the EIS measurement, the main controller 110 can control the EIS device connection unit 125 to electrically connect the EIS device 120 to the object battery pack. For example, when the object battery pack is the first battery pack 210, the main controller 110 can short-circuit the first switch SW1 to electrically connect the EIS device 120 to the first battery pack 210.

[0056] In operation S130, the EIS device 120 may generate EIS information by performing EIS measurement on the target battery pack. The EIS device 120 may transmit the EIS information about the target battery pack to the main controller 110, and the main controller 110 may perform a state analysis based on the EIS information and evaluate the degradation state and performance of the battery of the target battery pack as a result of the state analysis to determine whether the target battery pack needs to be replaced. Based on the result of determining whether the target battery pack needs to be replaced, the main controller 110 may perform an operation for replacing or reusing the target battery pack through the station controller 130 after operation S170.

[0057] Meanwhile, when the EIS measurement is completed, the main controller 110 may control the EIS device connection unit 125 to electrically separate the EIS device 120 from the target battery pack. For example, when the target battery pack is the first battery pack 210, the main controller 110 may turn off the first switch SW1 to electrically separate the EIS device 120 from the first battery pack 210.

[0058] Thereafter, in operation S140, the main controller 110 may determine whether the complementary battery pack 140 is discharged. When charging is performed on the complementary battery pack 140 in operation S110, as described above, at least one battery pack and the target battery pack may exist as battery packs connectable to the complementary battery pack 140, and power stored in the complementary battery pack 140 is transmitted to the at least one battery pack so that the complementary battery pack 140 may be discharged, as will be described later, which requires operation S140.

[0059] When the supplementary battery pack 140 is not discharged (No in operation S140), in operation S150, the main controller 110 may control the supplementary battery pack 140 to transfer power from the supplementary battery pack 140 to the target battery pack, thereby charging the target battery pack. For example, when the target battery pack is the first battery pack 210, the main controller 110 may short-circuit the first switch SW1 to charge the target battery pack.

[0060] When the complementary battery pack 140 is discharged (Yes in operation S140), in operation S160, the main controller 110 may control a charger corresponding to the target battery pack (hereinafter, target charger) to transfer power from the target charger to the target battery pack, thereby charging the target battery pack. When operation S150 is performed before the discharge of the complementary battery pack 140, that is, when the complementary battery pack 140 and the target battery pack are electrically connected to each other, before performing operation S160, the main controller 110 may electrically separate the complementary battery pack 140 from the target battery pack.

[0061] For example, when the target battery pack is the first battery pack 210 , the main controller 110 may control the first charger 150 to charge the target battery pack.

[0062] In operation S170, the main controller 110 may obtain the target SoC of the target battery pack and determine whether the target battery pack is fully charged. According to an embodiment, operation S170 may be performed according to a predefined cycle.

[0063] When the target battery pack is fully charged (Yes in operation S170 ), the main controller 110 may control the complementary battery pack 140 or the target charger through the station controller 130 to stop the currently performed charging and perform an operation of replacing or reusing the target battery pack.

[0064] When the target battery pack is not fully charged (NO in operation S170 ), operation S140 may be performed.

[0065] According to the aforementioned operation, the main controller 110 can first charge the target battery pack by transmitting power from the supplementary battery pack 140 to the target battery pack, and when the supplementary battery pack 140 is discharged, the main controller 110 can fully charge the target battery pack by transmitting power from the target charger to the target battery pack until the target battery pack is fully charged.

[0066] When the object SoC of the object battery pack is less than the target SoC (less than in operation S100 ), the main controller 110 may charge the object battery pack by using power of the supplementary battery pack 140 or the object charger in operation S180 .

[0067] exist Figure 4 In the embodiment, operation S180 may include detailed operations S182, S184 and S186.

[0068] In operation S182, the main controller 110 may determine whether the supplementary battery pack 140 is discharged. Although charging is not performed on the supplementary battery pack 140 before operation S182, as described above, at least one battery pack and the target battery pack may exist as battery packs that can be connected to the supplementary battery pack 140, and power may be transmitted from the at least one battery pack to the supplementary battery pack 140 so that the supplementary battery pack 140 can be charged, as will be described later, which requires operation S182.

[0069] When the supplementary battery pack 140 is not discharged (No in operation S182), in operation S184, the main controller 110 may control the supplementary battery pack 140 to transfer power from the supplementary battery pack 140 to the target battery pack, thereby charging the target battery pack. For example, when the target battery pack is the first battery pack 210, the main controller 110 may short-circuit the first switch SW1 to charge the target battery pack.

[0070] When the complementary battery pack 140 is discharged (Yes in operation S182), in operation S186, the main controller 110 may control the target charger corresponding to the target battery pack to transfer power from the target charger to the target battery pack, thereby charging the target battery pack. When operation S184 is performed before the complementary battery pack 140 is discharged, that is, when the complementary battery pack 140 and the target battery pack are electrically connected to each other, before performing operation S186, the main controller 110 may electrically separate the complementary battery pack 140 from the target battery pack.

[0071] For example, when the target battery pack is the first battery pack 210 , the main controller 110 may control the first charger 150 to charge the target battery pack.

[0072] Thereafter, in operation S120, the main controller 110 may obtain the object SoC of the object battery pack again and determine whether the object SoC of the object battery pack is the same as the target SoC. According to an embodiment, operation S120 may be performed according to a predefined cycle.

[0073] When the object SoC of the object battery pack is different from the target SoC, operation S180 may be performed again, and operations S180 and S120 may be repeatedly performed until the object SoC of the object battery pack is identical to the target SoC.

[0074] According to the aforementioned operation, in a case where the object SoC of the object battery pack is less than the target SoC, the main controller 110 may first charge the object battery pack by transferring power from the supplementary battery pack 140 to the object battery pack 140, and when the supplementary battery pack 140 is discharged, the main controller 110 may fully charge the object battery pack by transferring power from the object charger to the object battery pack until the object SoC of the object battery pack is the same as the target SoC.

[0075] According to the present disclosure, without requiring the user's time and effort to externally consume the battery to match the SoC of the battery pack with the target SoC, the BSS 100 autonomously and automatically sets the SoC of the battery pack to the target SoC, thereby providing a battery exchange service.

[0076] Furthermore, when the SoC of the battery pack is greater than the target SoC, the battery added in the BSS 100 may be used to store the remaining power and may be preferentially used to charge the battery pack without wasting the remaining power, thereby improving power efficiency.

[0077] Figure 5 is a block diagram illustrating a hardware configuration of a computing system for executing an operating method of a battery management system according to an embodiment disclosed herein.

[0078] refer to Figure 5 , 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 .

[0079] According to an embodiment, the computing system 1000 may be a system for performing the above-described operations of the battery management system 10 or the battery swap system 100 .

[0080] The MCU 1010 may be a processor that executes various programs stored in the memory 1020 .

[0081] For example, the MCU 1010 may be a processor for processing data and / or signals required for the main controller 110 to manage and control the battery management system 10 .

[0082] The memory 1020 may store various programs and / or data required to manage and control the battery management system 10. A plurality of memories 1020 may be provided depending on needs.

[0083] The memory 1020 may be a volatile memory or a nonvolatile 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 nonvolatile memory, a read-only memory (ROM), a programmable ROM (PROM), an electrically variable ROM (EAROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a flash memory, etc. may be used. The examples listed above of the memory 1020 are only examples and are not limited thereto.

[0084] The input / output I / F 1030 may be connected to the MCU 1010 by connecting an input device (not shown) such as a keyboard, a mouse, a touch panel, etc. and an output device (not shown) such as a display, etc.

[0085] The communication I / F 1040 , which is a component capable of transmitting and receiving various data to and from an external component including a server, may be various devices capable of supporting wired or wireless communication.

[0086] Thus, the computer program according to the embodiment disclosed herein may be recorded in the memory 1020 and executed and processed by the MCU 1010, thereby being implemented as an execution Figures 1 to 4 Modules with the functionality shown in .

[0087] The above description merely illustrates the technical idea of ​​the present disclosure, and a person skilled in the art to which the embodiments disclosed herein belong may make various modifications and variations without departing from the essential features of the embodiments of the present disclosure.

[0088] 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 within the scope of the present disclosure.

Claims

1. A battery exchange system, include: a main controller configured to obtain a subject state of charge (SoC) of a subject battery pack and compare the subject SoC with a target SoC; a supplemental battery pack configured to receive and store power from the subject battery pack when the subject SoC exceeds the target SoC; as well as An impedance measurement device is configured to measure an impedance of the subject battery pack when the subject SoC is the same as the target SoC.

2. The battery exchange system according to claim 1, in, The supplemental battery pack is further configured to transfer power to the subject battery pack when the subject SoC is less than the target SoC. 3 . The battery exchange system according to claim 2 , further comprising a target charger configured to charge the target battery pack when the complementary battery pack is discharged.

4. The battery exchange system according to claim 1, in, The supplemental battery pack is also configured to receive and store power from the supplemental battery pack and then transfer the stored power to another battery pack.

5. The battery exchange system according to claim 1, in, The supplemental battery pack is further configured to transfer power to the subject battery pack when the measurement of the impedance of the subject battery pack is completed. 6 . The battery exchange system according to claim 5 , further comprising a target charger configured to charge the target battery pack until the target battery pack is fully charged when the complementary battery pack is discharged.

7. The battery exchange system according to claim 1, in, The impedance measurement device is further configured to generate electrochemical impedance spectroscopy (EIS) information indicating a result of estimating a degradation state and performance of a battery included in the subject battery pack by using EIS based on the impedance measured for the subject battery pack.

8. The battery exchange system according to claim 7, in, The main controller is further configured to determine whether the subject battery pack needs to be replaced based on the EIS information.

9. The battery exchange system according to claim 7, in, The main controller is further configured to transmit the EIS information to a cloud server and receive information on whether the target battery pack needs to be replaced, determined based on the EIS information. 10 . The battery exchange system according to claim 8 , further comprising a station controller configured to perform physical control for replacing or reusing the subject battery pack according to a result of determining whether the subject battery pack needs to be replaced.

11. The battery exchange system according to claim 1, in, The main controller is further configured to, when recognizing that a predefined idle time has passed since it was determined that the subject SoC is identical to the target SoC, control the impedance measuring device to measure the impedance of the subject battery pack.

12. The battery exchange system according to claim 1, in, The supplementary battery pack is electrically connectable to a plurality of battery packs including the subject battery pack.

13. A method for operating a battery exchange system, the method comprising: include: Get the object state of charge (SoC) of the object battery pack; comparing the subject SoC to a target SoC; when the subject SoC exceeds the target SoC, transferring power from the subject battery pack to a supplementary battery pack and storing the power in the supplementary battery pack; as well as When the subject SoC is the same as the target SoC, the impedance of the subject battery pack is measured.

14. The operating method according to claim 13, in, When the subject SoC is smaller than the target SoC, the subject battery pack is charged using power stored in the complementary battery pack with priority over a subject charger corresponding to the subject battery pack.

15. The operating method according to claim 13, in, When the measurement of the impedance of the target battery pack is completed, the target battery pack is charged using the power stored in the complementary battery pack in priority to the target charger corresponding to the target battery pack.

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