Battery curve generation device and method

Abstract

A battery curve generation device according to an embodiment of the present disclosure includes: a curve obtaining unit configured to obtain a battery curve representing a correspondence relationship between a capacity and a voltage of a battery during charging and discharging, and a current curve representing a time-dependent current change; and a control unit configured to set a reference value based on a plurality of current values included in the current curve, set a target current section in an entire current section included in the current curve based on the reference value, and filter the battery curve based on a time-dependent current change included in the target current section.

Description

Technical Field

[0001] This application is based on and claims priority to Korean Patent Application No. 10-2024-0048649, filed with the Korean Intellectual Property Office on April 11, 2024, the disclosure of which is incorporated herein by reference in its entirety.

[0002] This disclosure relates to an apparatus and method for generating battery curves, and more specifically to an apparatus and method for generating battery curves that reflect the state of a battery. Background Technology

[0003] Recently, demand for portable electronic products such as laptops, cameras, and mobile phones has increased dramatically, and electric vehicles, energy storage batteries, robots, and satellites have seen significant development. Therefore, high-performance batteries that allow for repeated charging and discharging are being actively researched.

[0004] Currently available batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among them, lithium-ion batteries have attracted much attention due to their virtually non-existent memory effect compared to nickel-based batteries, as well as their very low self-discharge rate and high energy density.

[0005] While significant research is being conducted on these batteries in terms of high capacity and high density, improving lifespan and safety is also crucial. To enhance battery safety, technologies for accurately diagnosing the current state of the battery are needed. Summary of the Invention

[0006] Technical issues

[0007] This disclosure is designed to address the problems of the related technologies, and therefore aims to provide a battery curve generation apparatus and method that more accurately reflects the state of the battery.

[0008] These and other objects and advantages of this disclosure will be understood from the following detailed description and will become more fully apparent from the exemplary embodiments of this disclosure. Moreover, it will be readily understood that the objects and advantages of this disclosure can be achieved by the means and combinations thereof as shown in the appended claims.

[0009] Technical solution

[0010] A battery curve generation apparatus according to one aspect of this disclosure may include: a curve obtaining unit configured to obtain a battery curve representing the correspondence between battery capacity and voltage during charging and discharging, and a current curve representing time-related current changes; and a control unit configured to set a reference value based on a plurality of current values ​​included in the current curve, set a target current segment in the entire current segment included in the current curve based on the reference value, and filter the battery curve based on time-related current changes included in the target current segment.

[0011] The control unit can be configured to set a target current segment throughout the current range, including current values ​​lower than or equal to a reference value, when the battery curve is a discharge curve, and to filter the discharge curve based on the target current segment.

[0012] The control unit can be configured to set a target current segment throughout the entire current range, including a current value greater than or equal to a reference value, when the battery curve is a charging curve, and to filter the charging curve based on the target current segment.

[0013] The control unit can be configured to filter the capacity-based voltage included in the battery curve to correspond to time-dependent current variations included in the target current range.

[0014] The control unit can be configured to calculate the correction voltage and correction capacity for each time period based on time-related current changes included in the target current range, and to filter the battery curve based on the correction voltage and correction capacity.

[0015] The control unit can be configured to perform an initial filter on the battery curve based on time-dependent current changes included in the target current range, and to perform a secondary filter on the initially filtered battery curve using a smoothing filter.

[0016] The control unit can be configured to set the average, median, mode, or a combination thereof of multiple current values ​​included in the current curve as a reference value.

[0017] According to another aspect of this disclosure, a battery pack may include a battery profile generation apparatus according to one aspect of this disclosure.

[0018] A vehicle according to another aspect of this disclosure may include a battery curve generation apparatus according to one aspect of this disclosure.

[0019] A battery diagnostic device according to another aspect of the present disclosure may include: a communication unit configured to obtain a battery curve generated by a battery curve generation apparatus according to one aspect of the present disclosure; and a processor configured to diagnose the state of a battery based on the battery curve obtained by the communication unit.

[0020] A battery curve generation method according to another aspect of this disclosure may include: a curve obtaining step, obtaining a battery curve representing the correspondence between battery capacity and voltage during charging and discharging, and a current curve representing time-related current changes; a reference value setting step, setting a reference value based on multiple current values ​​included in the current curve; a target current segment setting step, setting a target current segment in the entire current segment included in the current curve based on the reference value; and a filtering step, filtering the battery curve based on time-related current changes included in the target current segment.

[0021] Beneficial effects

[0022] According to one aspect of this disclosure, the battery curve generation apparatus has the advantage of improving the accuracy of battery state diagnosis by generating more accurate battery curves that can be used to diagnose the state of the battery.

[0023] The effects of this disclosure are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art based on the description of the claims. Attached Figure Description

[0024] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0025] Figure 1 This is a schematic diagram illustrating a battery curve generation apparatus according to an embodiment of the present disclosure.

[0026] Figure 2 This is a schematic diagram illustrating the battery curves according to an embodiment of the present disclosure.

[0027] Figure 3 This is a schematic diagram illustrating the current curves according to an embodiment of the present disclosure.

[0028] Figure 4 and Figure 5 It is shown that it includes Figure 3 The target current segment in the current curve.

[0029] Figure 6 and Figure 7 This is a schematic diagram illustrating a filtered battery curve according to an embodiment of the present disclosure.

[0030] Figure 8 This is a schematic diagram illustrating a battery pack according to another embodiment of the present disclosure.

[0031] Figure 9This is a schematic diagram illustrating a vehicle according to yet another embodiment of the present disclosure.

[0032] Figure 10 This is a diagram schematically illustrating a method for generating battery curves according to yet another embodiment of the present disclosure. Detailed Implementation

[0033] It should be understood that the terms used in the specification and appended claims should not be construed as limited to their general and dictionary meanings, but rather interpreted based on their meanings and concepts corresponding to the technical aspects of this disclosure, on the basis of the principle that the inventors are allowed to define the terms appropriately for the purpose of best description.

[0034] Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of this disclosure. It should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0035] In addition, when describing this disclosure, a detailed description of a known element or function is omitted in this document if it is considered to obscure the key subject matter of the disclosure.

[0036] Ordinal terms such as “first” and “second” can be used to distinguish one element from another among various elements, but are not intended to limit elements by terminology.

[0037] Throughout this specification, when a section is referred to as “comprising” or “including” any element, it means that the section may further include other elements without excluding them, unless otherwise specifically stated.

[0038] Furthermore, throughout the specification, when a part is referred to as being “connected” to another part, it is not limited to the case where they are “directly connected” but also includes the case where they are “indirectly connected” when another element is inserted between them.

[0039] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0040] Furthermore, a battery refers to a single, physically separable cell with negative and positive terminals. For example, a lithium-ion battery or a lithium polymer battery can be considered a battery. Additionally, batteries can be cylindrical, prismatic, or pouch-shaped. Furthermore, a battery can also refer to a battery bank, battery module, or battery pack in which multiple cells are connected in series and / or parallel. Hereinafter, for ease of explanation, a battery will be interpreted as referring to a single, independent cell.

[0041] Figure 1 This is a schematic diagram illustrating a battery curve generation apparatus 100 according to an embodiment of the present disclosure.

[0042] refer to Figure 1 The battery curve generation device 100 may include a curve acquisition unit 110 and a control unit 120.

[0043] The curve acquisition unit 110 can be configured to acquire a battery curve PB representing the relationship between battery capacity and voltage during charging and discharging, and a current curve PC representing time-dependent current changes.

[0044] Specifically, the battery curve PB can be either a charging curve or a discharging curve.

[0045] For example, the battery curve PB is a charging curve that shows the relationship between voltage (V) and capacity (Q) as the battery's SOC is charged from a preset starting SOC (0%) to a preset ending SOC (100%). Here, the battery can be charged through repeated charging and discharging. That is, the battery can be charged according to the current pattern between the battery and the load, as charging current flows into the battery and discharging current flows out.

[0046] As another example, the battery curve PB is a discharge curve that shows the relationship between voltage (V) and capacity (Q) as the battery's SOC decreases from a preset discharge start SOC or 100% to a preset discharge end SOC or 0%. Here, the battery can be discharged by repeated charging and discharging. That is, the battery can be discharged according to the current pattern between the battery and the load, as charging current flows into the battery and discharging current flows out of the battery.

[0047] Figure 2 This is a schematic diagram illustrating the battery curve PB according to an embodiment of the present disclosure. Specifically, Figure 2 It is a diagram that schematically shows the discharge curve of a battery.

[0048] refer to Figure 2 The battery capacity can decrease from the initial discharge capacity (DCi) to the final discharge capacity (DCf). Furthermore, the battery voltage can decrease from the initial discharge voltage (Vi) to the final discharge voltage (Vf). Here, because charging and discharging are performed during the battery's discharge process, even if the capacity decreases, the battery voltage may not continuously decrease, but rather may increase and decrease.

[0049] For example, suppose a battery is installed in an electric vehicle (EV). When the EV is in operation, the battery is primarily discharged, but it can be recharged through regenerative braking, etc. That is, during the driving cycle of the EV, the battery may be charged and discharged simultaneously with its discharge process. In this case, the battery's discharge curve can look similar to... Figure 2 Examples of implementations.

[0050] Figure 3 This is a schematic diagram illustrating the current curve PC according to an embodiment of the present disclosure. Specifically, Figure 3 The current curve PC can be corresponding to Figure 2 The battery curve PB represents the current curve PC. In other words, during the discharge process of the battery, the change in current over time is represented by the current curve PC, and the change in voltage over capacity is represented by the battery curve PB.

[0051] refer to Figure 3 The discharge of a battery can proceed from the start time of discharge (Ti) to the end time of discharge (Tf). Furthermore, during the discharge process, both the inflow of charging current (the magnitude of the current exceeds 0) and the output of discharging current (the magnitude of the current is less than 0) can occur.

[0052] In one embodiment, the curve acquisition unit 110 can directly receive the battery curve PB from an external source. That is, the curve acquisition unit 110 can obtain the battery curve PB by being connected to an external source via a wired and / or wireless connection and receiving the battery curve PB.

[0053] In another embodiment, the curve acquisition unit 110 can receive battery information regarding the battery's voltage and capacity. Then, the curve acquisition unit 110 can generate a battery curve PB based on the received battery information. That is, the curve acquisition unit 110 can obtain the battery curve PB by directly generating the battery curve PB based on the battery information.

[0054] The curve acquisition unit 110 can be connected to communicate with the control unit 120. For example, the curve acquisition unit 110 can be connected to the control unit 120 via wired and / or wireless means. The curve acquisition unit can send the acquired battery curve PB to the control unit 120.

[0055] The control unit 120 can be configured to set a reference value based on multiple current values ​​included in the current curve PC.

[0056] Specifically, the current curve PC can include currents greater than or equal to 0 and currents less than 0. Therefore, the control unit 120 can set a reference value, which serves as a standard for filtering the battery curve PB. In other words, the reference value can refer to a representative current value of the corresponding current curve PC.

[0057] For example, control unit 120 can be configured to set a value calculated by the average, median, mode, or a combination thereof of multiple current values ​​included in the current curve PC as a reference value. As a specific example, control unit 120 can set the average, median, or mode of multiple current values ​​as a reference value, or it can set the average of two or more of the average, median, and mode values ​​as a reference value.

[0058] In the above, the average, median, and mode values ​​are described as examples of reference values, but any method that can represent the reference values ​​of the current curve PC from multiple current value settings included in the current curve PC can be applied without limitation.

[0059] The control unit 120 can be configured to set a target current segment RT across the entire current segment included in the current curve PC based on a reference value.

[0060] Specifically, the control unit 120 can divide the current curve PC into multiple current segments based on a reference value. For example, when the reference value is set to 1, the current curve PC can be divided into two current segments centered on the reference value. Furthermore, the target current segment RT can be set based on the type of the battery curve PB (charging curve or discharging curve).

[0061] For example, the control unit 120 can be configured to set a target current segment RT that includes a current value less than or equal to a reference value throughout the entire current segment when the battery curve PB is a discharge curve.

[0062] As another example, the control unit 120 can be configured to set a target current segment RT that includes a current value greater than or equal to a reference value throughout the entire current segment when the battery curve PB is a charging curve.

[0063] In other words, since the battery curve PB is filtered based on the current value included in the target current segment RT, the control unit 120 can set the target current segment RT to the type corresponding to the battery curve PB.

[0064] Figure 4 and Figure 5 It is shown that it includes Figure 3 The target current segment RT in the current curve PC is plotted.

[0065] Specifically, in Figure 4 In one embodiment, the control unit 120 can set the reference value as the average of multiple current values. Then, the control unit 120 can divide the entire current segment of the battery curve PB into a first current segment RR1 and a second current segment RR2 based on the reference value. Then, because... Figure 2The battery curve PB is the discharge curve, so the control unit 120 can set the first current segment RR1 as the target current segment RT.

[0066] The control unit 120 can be configured to filter the battery curve PB based on time-related current changes included in the target current segment RT.

[0067] Specifically, since the battery curve PB is based on a time-dependent current change curve included in the entire current range, the control unit 120 can filter the battery curve PB based on the time-dependent current change included in the target current range RT.

[0068] More specifically, the control unit 120 can filter the battery curve PB so that it only reflects time-dependent current changes included in the target current segment RT. For example, in Figure 4 and Figure 5 In this embodiment, the control unit 120 can filter the battery curve PB so that it only reflects the time-related current changes included in the first current segment RR1. That is, the time-related current changes included in the second current segment RR2 may not be reflected in the filtered battery curve PB.

[0069] For example, the control unit 120 can be configured to perform an initial filter on the battery curve PB based on time-related current changes included in the target current segment RT to generate a filtered battery curve PB_f1.

[0070] Optionally, the control unit 120 can then be configured to perform a secondary filter on the initially filtered battery curve PB_f1 using a smoothing filter to generate a filtered battery curve PB_f2. Here, the smoothing filter is a filter used to reduce noise or smooth the trend of the battery curve PB, and moving averages, kernel density estimation, and Lowess (locally weighted scatter plot smoother) can be applied without limitation.

[0071] Figure 6 and Figure 7 This is a schematic diagram illustrating a filtered battery curve PB_f according to an embodiment of the present disclosure.

[0072] Specifically, according to Figure 6 The battery curve PB_f1 in the embodiment is an embodiment in which the battery curve PB is initially filtered, and according to Figure 7 The battery curve BP_f2 in the embodiment is an example in which the battery curve PB_f1, which has been filtered once, is filtered twice.

[0073] The control unit 120 can remove noise from the battery curve PB obtained by the curve acquisition unit 110 by filtering the battery curve PB based on the time-related current changes included in the target current segment RT. In other words, the filtered battery curve PB_f1 can be generated based on noise removal.

[0074] Furthermore, the control unit 120 can generate a battery curve PB_f2 that more accurately represents the battery's state by smoothing the filtered battery curve PB_f1. Note that the secondary filtering process based on the smoothing filter can be omitted at the user's request.

[0075] The battery curve generation apparatus 100 according to embodiments of the present disclosure can remove unwanted noise included in the battery curve PB by limiting the current segment according to the type of the battery curve PB. Therefore, the battery curve generation apparatus 100 can generate a battery curve PB_f that more accurately reflects the current state of the battery.

[0076] For example, the generated battery curve PB_f can more accurately represent the correspondence between battery capacity and voltage. Therefore, based on the generated battery curve PB_f, the SOX (x-state) of the battery, such as SOC (State of Charge), SOH (State of Health), and SOP (State of Power), can be estimated more accurately. Therefore, the battery curve generation device 100 has the advantage of improving the accuracy of battery state diagnosis by more accurately generating the battery curve PB_f that can be used to diagnose the battery's state.

[0077] Meanwhile, the curve acquisition unit 110 and control unit 120 included in the battery curve generation apparatus 100 may optionally include processors, application-specific integrated circuits (ASICs), other chipsets, logic circuits, registers, communication modems, data processing devices, etc., known in the art, to execute the various control logics performed in this disclosure. Furthermore, when the control logic is implemented as software, the curve acquisition unit 110 and control unit 120 can be implemented as a set of program modules. In this case, the program modules can be stored in memory and executed by the curve acquisition unit 110 and control unit 120. The memory can be internal or external to the curve acquisition unit 110 and control unit 120, and can be connected to the curve acquisition unit 110 and control unit 120 by various known means.

[0078] Furthermore, the battery curve generation apparatus 100 may also include a storage unit 130. The storage unit 130 may store data required for the operation and function of each component of the battery curve generation apparatus 100, data generated during the execution of operations or functions, etc. There are no particular limitations on the type of storage unit 130, as long as it is a known information storage device capable of recording, erasing, updating, and retrieving data. As examples, the information storage device may include RAM, flash memory, ROM, EEPROM, registers, etc. In addition, the storage unit 130 may store program code that defines the processes that can be executed by the curve acquisition unit 110 and the control unit 120.

[0079] For example, storage unit 130 can store battery curve PB, current curve PC, and smoothing filter. Furthermore, storage unit 130 can also store battery curves PB_f1 and PB_f2 filtered by control unit 120.

[0080] The following describes in more detail an embodiment in which the control unit 120 filters the battery curve PB.

[0081] The control unit 120 can be configured to filter the capacity-based voltage included in the battery curve PB to correspond to the time-dependent current variation included in the target current segment RT.

[0082] Specifically, the control unit 120 can be configured to calculate the time-dependent correction voltage and correction capacity based on the time-dependent current changes included in the target current segment RT.

[0083] For example, the voltage and capacity included in the battery curve PB obtained by the curve acquisition unit 110 are based on time-dependent current changes included throughout the entire current range. That is, the correspondence between voltage and capacity based on time-dependent current changes throughout the entire current range appears in the battery curve PB. In this case, voltage and capacity based on current values ​​(noise) that do not correspond to the type of battery curve PB (charging curve or discharging curve) may also be included in the battery curve PB. Therefore, the control unit 120 can calculate the corrected voltage and corrected capacity based on the time-dependent current changes in the target current range RT.

[0084] For example, in Figure 2 and Figure 4 In the embodiments, Figure 2The voltage and capacity shown in the battery curve PB are based on the current values ​​included in the first current segment RR1 and the second current segment RR2. Here, since the battery curve PB is a discharge curve, the current values ​​included in the second current segment RR2 may be noise. Therefore, the control unit 120 can calculate the time-related voltage change and the time-related capacity change based on the current values ​​included in the first current segment RR1.

[0085] In addition, the control unit 120 can be configured to filter the battery curve PB based on the correction voltage and correction capacity.

[0086] Specifically, the control unit 120 can filter the battery curve PB by matching the generated time-related voltage change with the time-related capacity change to display the correspondence between capacity and voltage.

[0087] For example, the control unit 120 can, according to Figure 2 The battery curve PB of the embodiment is filtered to generate according to Figure 6 The battery curve PB_f1 of the embodiment. Furthermore, the control unit 120 can further adjust the battery curve according to... Figure 6 The battery curve PB_f1 of the embodiment is filtered to generate according to Figure 7 The battery curve PB_f2 of the embodiment.

[0088] The battery curve generation apparatus 100 according to this disclosure can be applied to a battery management system (BMS). That is, a BMS according to this disclosure may include the aforementioned battery curve generation apparatus 100. In this configuration, at least some of the components of the battery curve generation apparatus 100 can be implemented by supplementing or adding the functionality of components included in a conventional BMS. For example, the curve acquisition unit 110, control unit 120, and storage unit 130 of the battery curve generation apparatus 100 can be implemented as components of a BMS.

[0089] Furthermore, the battery profile generation device 100 according to this disclosure can be disposed in a battery pack. That is, a battery pack according to this disclosure may include the aforementioned battery profile generation device 100 and at least one battery cell. In addition, the battery pack may also include electrical components (relays, fuses, etc.) and a housing.

[0090] Figure 8 This is a diagram illustrating a battery pack according to another embodiment of the present disclosure.

[0091] The positive terminal of battery 11 can be connected to the positive terminal P+ of battery pack 10, and the negative terminal of battery 11 can be connected to the negative terminal P- of battery pack 10.

[0092] The measuring unit 12 can be connected to a first sensing line SL1, a second sensing line SL2, and a third sensing line SL3. Specifically, the measuring unit 12 can be connected to the positive terminal of the battery 11 via the first sensing line SL1 and to the negative terminal of the battery 11 via the second sensing line SL2. The measuring unit 12 can measure the voltage of the battery 11 based on the voltage measured at each of the first sensing line SL1 and the second sensing line SL2.

[0093] Furthermore, the measurement unit 12 can be connected to the current measurement unit A via the third sensing line SL3. For example, the current measurement unit A can be an ammeter or a shunt resistor capable of measuring the charging current and discharging current of the battery 11. The measurement unit 12 can measure the charging current of the battery 11 via the third sensing line SL3 to calculate the amount of charge. Additionally, the measurement unit 12 can measure the discharging current of the battery 11 via the third sensing line SL3 to calculate the amount of discharge.

[0094] For example, the curve acquisition unit 110 can receive battery information about the battery's voltage and current from the measurement unit 12. Then, the curve acquisition unit 110 can generate a battery curve PB based on the battery information.

[0095] As another example, curve acquisition unit 110 can receive battery curve PB from measurement unit 12.

[0096] An external device can be connected to the positive terminal P+ and the negative terminal P- of the battery pack 10. For example, the external device can be a charging device or a load. In addition, the positive terminal of the battery 11, the positive terminal P+ of the battery pack 10, the external device, the negative terminal P- of the battery pack 10, and the negative terminal of the battery 11 can be electrically connected.

[0097] Figure 9 This is a schematic diagram illustrating a vehicle 900 according to another embodiment of the present disclosure.

[0098] refer to Figure 9 The battery pack 910 according to embodiments of this disclosure can be included in a vehicle 900, such as an electric vehicle (EV) or a hybrid vehicle (HV). Furthermore, the battery pack 910 can supply power to a motor via an inverter disposed in the vehicle 900 to drive the vehicle 900. Here, the battery pack 910 may include a battery curve generation device 100. That is, the vehicle 900 may include a battery curve generation device 100. In this case, the battery curve generation device 100 may be an on-board device included in the vehicle 900.

[0099] For example, the battery curve generation device 100 can generate a battery curve PB_f that more accurately reflects the state of the battery pack 910 by filtering the battery curve PB obtained from the battery pack 910 during charging or discharging.

[0100] A battery diagnostic device (not shown) according to another embodiment of the present disclosure may include a communication unit and a processor.

[0101] The communication unit can be configured to obtain the battery curve PB_f generated by the battery curve generation device 100.

[0102] For example, the communication unit can be connected via wired and / or wireless means to communicate with the battery curve generation device 100. Furthermore, the communication unit can receive the filtered battery curve PB_f from the battery curve generation device 100.

[0103] As another example, the communication unit can be connected wired and / or wirelessly to communicate with third-party devices other than the battery curve generation device 100. Furthermore, the communication unit can receive filtered battery curves PB_f from the third-party devices.

[0104] The processor can be configured to diagnose the battery status based on the battery curve PB_f obtained through the communication unit.

[0105] Specifically, the filtered battery curve PB_f is a noise-removed curve that more accurately represents the battery's state. Therefore, the processor can more accurately estimate the battery's SOX based on the filtered battery curve PB_f. In other words, the battery's state can be diagnosed more accurately.

[0106] Furthermore, battery diagnostic equipment can increase the expected lifespan of a battery by setting its usage conditions to correspond to an estimated state of the battery. For example, the equipment can modify battery usage conditions such as threshold temperature, threshold SOC, threshold voltage, and threshold C-rate.

[0107] Figure 10 This is a diagram schematically illustrating a method for generating battery curves according to yet another embodiment of the present disclosure.

[0108] refer to Figure 10 The battery curve generation method may include a curve acquisition step (S100), a reference value setting step (S200), a target current segment setting step (S300), and a filtering step (S400).

[0109] Preferably, each step of the battery curve generation method can be performed by the battery curve generation device 100. In the following description, for ease of explanation, content overlapping with the previously described content will be omitted or briefly described.

[0110] The curve acquisition step (S100) is to obtain the battery curve PB, which represents the relationship between the battery capacity and voltage during charging and discharging, and the current curve PC, which represents the time-related current change, and can be executed by the curve acquisition unit 110.

[0111] In one embodiment, the curve acquisition unit 110 can directly receive the battery curve PB from an external source. That is, the curve acquisition unit 110 can obtain the battery curve PB by being connected to an external source via a wired and / or wireless connection and receiving the battery curve PB.

[0112] In another embodiment, the curve acquisition unit 110 can receive battery information regarding the battery's voltage and capacity. Then, the curve acquisition unit 110 can generate a battery curve PB based on the received battery information. That is, the curve acquisition unit 110 can obtain the battery curve PB by directly generating the battery curve PB based on the battery information.

[0113] The reference value setting step (S200) is a step of setting a reference value based on multiple current values ​​included in the current curve PC, and can be executed by the control unit 120.

[0114] Here, the reference value can represent the representative current value of the corresponding current curve PC.

[0115] For example, control unit 120 can be configured to set a value calculated by the average, median, mode, or a combination thereof of multiple current values ​​included in the current curve PC as a reference value. As a specific example, control unit 120 can set the average, median, or mode of multiple current values ​​as a reference value, or it can set the average of two or more of the average, median, and mode values ​​as a reference value.

[0116] The target current segment setting step (S300) is a step of setting the target current segment RT in the entire current segment included in the current curve PC based on a reference value, and can be executed by the control unit 120.

[0117] For example, the control unit 120 can be configured to set a target current segment RT that includes a current value less than or equal to a reference value throughout the entire current segment when the battery curve PB is a discharge curve.

[0118] As another example, the control unit 120 can be configured to set a target current segment RT that includes a current value greater than or equal to a reference value throughout the entire current segment when the battery curve PB is a charging curve.

[0119] The filtering step (S400) is a step of filtering the battery curve PB based on the time-related current changes included in the target current segment RT, and can be executed by the control unit 120.

[0120] For example, control unit 120 can be configured to perform an initial filter on battery curve PB based on time-dependent current variations included in the target current segment RT to generate a filtered battery curve PB_f1. Alternatively, control unit 120 can be configured to perform a secondary filter on the initially filtered battery curve PB_f1 using a smoothing filter to generate a filtered battery curve PB_f2.

[0121] The embodiments of this disclosure described above can be implemented not only by apparatus and methods, but also by a program that implements functions corresponding to the configuration of the embodiments of this disclosure, or a recording medium on which the program is recorded. Those skilled in the art can readily implement the program or recording medium based on the description of the above embodiments.

[0122] This disclosure has been described in detail. However, while the detailed description and specific examples indicate preferred embodiments of this disclosure, they are given by way of illustration only, as various changes and modifications within the scope of this disclosure will become apparent to those skilled in the art based on the detailed description.

[0123] Furthermore, without departing from the technical aspects of this disclosure, those skilled in the art can make many substitutions, modifications and changes to the disclosure described above, and this disclosure is not limited to the above embodiments and drawings, and each embodiment can be selectively combined in part or in whole to allow various modifications.

[0124] (Explanation of the labels in the attached diagram)

[0125] 10: Battery Pack

[0126] 11: Battery

[0127] 12: Measurement Unit

[0128] 100: Battery curve generation device

[0129] 110: Curve Acquisition Unit

[0130] 120: Control Unit

[0131] 130: Storage unit

[0132] 900: Vehicles

[0133] 910: Battery Pack

Claims

1. A battery curve generation device, comprising: A curve acquisition unit is configured to acquire a battery curve representing the relationship between battery capacity and voltage during charging and discharging, and a current curve representing time-dependent current changes. as well as A control unit is configured to set a reference value based on a plurality of current values ​​included in the current curve, set a target current segment in the entire current segment included in the current curve based on the reference value, and filter the battery curve based on the time-related current changes included in the target current segment.

2. The battery curve generation device according to claim 1, in, The control unit is configured to set a target current segment in the entire current range that includes a current value lower than or equal to the reference value when the battery curve is a discharge curve, and to filter the discharge curve based on the target current segment.

3. The battery curve generation device according to claim 1, in, The control unit is configured to set a target current segment in the entire current segment that includes a current value greater than or equal to the reference value when the battery curve is a charging curve, and to filter the charging curve based on the target current segment.

4. The battery curve generation device according to claim 1, in, The control unit is configured to filter the capacity-based voltage included in the battery curve to correspond to the time-related current variation included in the target current range.

5. The battery curve generation device according to claim 4, in, The control unit is configured to calculate a correction voltage and correction capacity for each time period based on the time-related current variation included in the target current range, and to filter the battery curve based on the correction voltage and the correction capacity.

6. The battery curve generation device according to claim 1, in, The control unit is configured to perform an initial filter on the battery curve based on the time-related current changes included in the target current range, and to perform a secondary filter on the initially filtered battery curve using a smoothing filter.

7. The battery curve generation device according to claim 1, in, The control unit is configured to set the average, median, mode, or a combination thereof of the plurality of current values ​​included in the current curve as the reference value.

8. A battery pack comprising a battery profile generation apparatus according to any one of claims 1 to 7.

9. A vehicle comprising a battery profile generation apparatus according to any one of claims 1 to 7.

10. A battery diagnostic device, comprising: A communication unit configured to obtain the battery curve generated by the battery curve generation apparatus according to any one of claims 1 to 7; as well as A processor configured to diagnose the state of the battery based on the battery curve obtained through the communication unit.

11. A method for generating a battery curve, comprising: The curve acquisition step obtains a battery curve representing the relationship between battery capacity and voltage during charging and discharging, and a current curve representing time-dependent current changes. A reference value setting step, wherein the reference value setting step sets a reference value based on a plurality of current values ​​included in the current curve; The target current segment setting step is to set a target current segment in the entire current segment included in the current curve based on the reference value. as well as A filtering step, wherein the filtering step filters the battery curve based on the time-related current changes included in the target current range.

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