Apparatus and method for generating battery profile

Abstract

An apparatus for generating a battery profile, according to one embodiment of the present invention, comprises: a profile acquisition unit configured to acquire a battery profile indicating a corresponding relationship between the capacity and the voltage of a battery in a charging / discharging process, and a current profile indicating current variation by time; and a control unit configured to set a reference value on the basis of multiple current values included in the current profile, set a target current period among all current periods included in the current profile, on the basis of the reference value, and filter the battery profile on the basis of the current variation by time included in the target current period.

Description

Battery profile generation device and method

[0001] This application claims priority to Korean Patent Application No. 10-2024-0048649, filed on April 11, 2024, the entire contents of which are disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0002] The present invention relates to a battery profile generation device and method, and more particularly, to a battery profile generation device and method for generating a battery profile that reflects the state of a battery.

[0003] Recently, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has rapidly increased, and the development of electric vehicles, energy storage batteries, robots, and satellites has been in full swing, research into high-performance batteries capable of repeated charging and discharging is actively being conducted.

[0004] Currently commercialized batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium batteries. Among these, lithium batteries are receiving attention for their advantages of being able to charge and discharge freely, having a very low self-discharge rate, and having a high energy density, as they have almost no memory effect compared to nickel-based batteries.

[0005] While extensive research is being conducted on these batteries to improve capacity and density, improving lifespan and safety is also crucial. To improve battery safety, technology is required to accurately diagnose the current battery condition.

[0006] The present invention has been devised to solve the above problems, and aims to provide a battery profile generation device and method that more accurately reflect the state of a battery.

[0007] Other objects and advantages of the present invention can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0008] A battery profile generation device according to one aspect of the present invention may include a profile acquisition unit configured to acquire a battery profile indicating a correspondence between a capacity and a voltage of a battery during a charge / discharge process and a current profile indicating a current change over time; and a control unit configured to set a reference value based on a plurality of current values ​​included in the current profile, set a target current section among all current sections included in the current profile based on the reference value, and filter the battery profile based on the current change over time included in the target current section.

[0009] The control unit may be configured to set a target current section that includes current values ​​lower than or equal to the reference value in the entire current section when the battery profile is a discharge profile, and to filter the discharge profile based on the target current section.

[0010] The control unit may be configured to set a target current section that includes current values ​​greater than or equal to the reference value in the entire current section when the battery profile is a charging profile, and to filter the charging profile based on the target current section.

[0011] The above control unit may be configured to filter the voltage by capacity included in the battery profile so as to correspond to the time-based current change included in the target current section.

[0012] The control unit may be configured to calculate a corrected voltage and a corrected capacity for each time period based on the hourly current change included in the target current section, and to filter the battery profile based on the corrected voltage and the corrected capacity.

[0013] The control unit may be configured to first filter the battery profile based on the hourly current change included in the target current section, and secondarily filter the first-filtered battery profile using a smoothing filter.

[0014] The above control unit may be configured to set the average value, median value, mode value, or a combination thereof of a plurality of current values ​​included in the current profile as the reference value.

[0015] A battery pack according to another aspect of the present invention may include a battery profile generating device according to one aspect of the present invention.

[0016] A vehicle according to another aspect of the present invention may include a battery profile generating device according to one aspect of the present invention.

[0017] A battery diagnosis device according to another aspect of the present invention comprises: a communication unit configured to obtain a battery profile generated by a battery profile generation device according to one aspect of the present invention; and configured to diagnose the state of the battery based on the battery profile obtained through the communication unit.

[0018] A battery profile generation method according to another aspect of the present invention may include a profile acquisition step of acquiring a battery profile indicating a correspondence between a capacity and a voltage of a battery during a charge / discharge process and a current profile indicating a current change over time; a reference value setting step of setting a reference value based on a plurality of current values ​​included in the current profile; a target current section setting step of setting a target current section among all current sections included in the current profile based on the reference value; and a filtering step of filtering the battery profile based on the current change over time included in the target current section.

[0019] According to one aspect of the present invention, a battery profile generation device has the advantage of improving the accuracy of battery status diagnosis by more accurately generating a battery profile that can be used to diagnose the status of a battery.

[0020] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0021] The following drawings attached to this specification serve to further understand the technical idea of ​​the present invention together with the detailed description of the invention described below, and therefore the present invention should not be interpreted as being limited to the matters described in such drawings.

[0022] FIG. 1 is a schematic diagram illustrating a battery profile generation device according to one embodiment of the present invention.

[0023] FIG. 2 is a diagram schematically illustrating a battery profile according to one embodiment of the present invention.

[0024] FIG. 3 is a diagram schematically illustrating a current profile according to one embodiment of the present invention.

[0025] Figures 4 and 5 are diagrams illustrating target current sections included in the current profile of Figure 3.

[0026] FIGS. 6 and 7 are schematic diagrams illustrating a filtered battery profile according to one embodiment of the present invention.

[0027] FIG. 8 is a schematic drawing of a battery pack according to another embodiment of the present invention.

[0028] Figure 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.

[0029] FIG. 10 is a diagram schematically illustrating a battery profile generation method according to another embodiment of the present invention.

[0030] Terms or words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best possible manner.

[0031] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0032] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0033] Terms that include ordinal numbers, such as first, second, etc., are used to distinguish one of the various components from the rest, and are not used to limit the components by such terms.

[0034] Throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

[0035] Additionally, throughout the specification, when we say that a part is "connected" to another part, this includes not only cases where it is "directly connected" but also cases where it is "indirectly connected" with other elements in between.

[0036]

[0037] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0038] A battery is a physically separate, independent cell having a negative terminal and a positive terminal. For example, a lithium-ion battery or a lithium polymer battery may be considered a battery. Furthermore, the battery may be of a cylindrical, prismatic, or pouch type. Furthermore, a battery may also refer to a battery bank, battery module, or battery pack in which multiple cells are connected in series and / or parallel. For convenience of explanation, the term "battery" will be described herein below as referring to a single, independent cell.

[0039] FIG. 1 is a schematic diagram illustrating a battery profile generation device (100) according to one embodiment of the present invention.

[0040] Referring to FIG. 1, a battery profile generation device (100) may include a profile acquisition unit (110) and a control unit (120).

[0041] The profile acquisition unit (110) can be configured to acquire a battery profile (PB) indicating the correspondence between the capacity and voltage of the battery during the charging and discharging process, and a current profile (PC) indicating the change in current over time.

[0042] Specifically, the battery profile (PB) can be a charge profile or a discharge profile.

[0043] For example, a battery profile (PB) is a charge profile that represents the relationship between voltage (V) and capacity (Q) when the battery's SOC is charged from a preset charge start SOC or 0% to a preset charge end SOC or 100%. Here, the battery can be charged by repeating charge and discharge. That is, the battery can be charged as the charging current flows into the battery and the discharge current flows out from the battery according to the current pattern between the battery and the load.

[0044] As another example, a battery profile (PB) is a discharge profile that represents the relationship between voltage (V) and capacity (Q) when the battery's SOC is discharged from a preset discharge start SOC, or 100%, to a preset discharge end SOC, or 0%. Here, the battery can be discharged by repeating charge and discharge. That is, the battery can be discharged as the charging current flows into the battery and the discharge current flows out from the battery according to the current pattern between the battery and the load.

[0045] FIG. 2 is a schematic diagram illustrating a battery profile (PB) according to one embodiment of the present invention. Specifically, FIG. 2 is a schematic diagram illustrating a discharge profile of a battery.

[0046] Referring to Figure 2, the capacity of the battery can be reduced from the discharge start capacity (DCi) to the discharge end capacity (DCf). Furthermore, the voltage of the battery can be reduced from the discharge start voltage (Vi) to the discharge end voltage (Vf). Here, since charging and discharging occur during the battery's discharge process, even if the capacity decreases, the battery's voltage can continuously increase and decrease.

[0047] For example, assume a battery is installed in an electric vehicle (EV). While the EV is in operation, the battery is essentially discharged, but can be recharged through regenerative braking, etc. In other words, during the driving cycle of the EV, the battery can be charged and discharged even during the discharge process. In this case, the discharge profile for the battery may be similar to the example illustrated in FIG. 2.

[0048] FIG. 3 is a schematic diagram illustrating a current profile (PC) according to one embodiment of the present invention. Specifically, the current profile (PC) of FIG. 3 may correspond to the battery profile (PB) of FIG. 2. That is, during the battery discharge process, the change in current over time is represented by the current profile (PC), and the change in voltage over time is represented by the battery profile (PB).

[0049] Referring to Fig. 3, the discharge of the battery can proceed from the discharge start time (Ti) to the discharge end time (Tf). In addition, during the discharge process of the battery, both the inflow of a charging current (the magnitude of the current exceeds 0) and the output of a discharge current (the magnitude of the current is less than 0) can occur.

[0050] In one embodiment, the profile acquisition unit (110) can directly receive a battery profile (PB) from the outside. That is, the profile acquisition unit (110) can acquire a battery profile (PB) by being connected to the outside via wire and / or wirelessly and receiving the battery profile (PB).

[0051] In another embodiment, the profile acquisition unit (110) may receive battery information regarding the voltage and capacity of the battery. Furthermore, the profile acquisition unit (110) may generate a battery profile (PB) based on the received battery information. That is, the profile acquisition unit (110) may directly generate the battery profile (PB) based on the battery information, thereby acquiring the battery profile (PB).

[0052] The profile acquisition unit (110) may be connected to the control unit (120) so as to be able to communicate with it. For example, the profile acquisition unit (110) may be connected to the control unit (120) by wire and / or wirelessly. The profile acquisition unit may transmit the acquired differential profile to the control unit (120).

[0053] The control unit (120) can be configured to set a reference value based on a plurality of current values ​​included in the current profile (PC).

[0054] Specifically, the current profile (PC) may include both currents with a magnitude greater than or equal to 0 and currents with a magnitude less than 0. Accordingly, the control unit (120) may set a reference value that serves as a criterion for filtering the battery profile (PB). That is, the reference value may mean a representative current value of the corresponding current profile (PC).

[0055] For example, the control unit (120) may be configured to set a value calculated by the average, median, mode, or a combination thereof of a plurality of current values ​​included in the current profile (PC) as a reference value. As a specific example, the control unit (120) may set the average, median, or mode of a plurality of current values ​​as a reference value, or may set an average value of two or more of the average, median, and mode as a reference value.

[0056] In the above, the average, median, and mode have been described as examples of reference values, but any method of setting a reference value that can represent a current profile (PC) from multiple current values ​​included in the current profile (PC) can be applied without limitation.

[0057] The control unit (120) can be configured to set a target current section (RT) among the entire current sections included in the current profile (PC) based on a reference value.

[0058] Specifically, the control unit (120) can divide the current profile (PC) into multiple current sections based on a reference value. For example, if the reference value is set to one, the current profile (PC) can be divided into two current sections centered on the reference value. In addition, the target current section (RT) can be set based on the type of battery profile (PB) (charge profile or discharge profile).

[0059] For example, the control unit (120) may be configured to set a target current section (RT) that includes current values ​​that are lower than a reference value in the entire current section when the battery profile (PB) is a discharge profile.

[0060] As another example, the control unit (120) may be configured to set a target current section (RT) that includes current values ​​greater than or equal to a reference value in the entire current section when the battery profile (PB) is a charging profile.

[0061] That is, since the battery profile (PB) is filtered based on the current value included in the target current section (RT), the control unit (120) can set the target current section (RT) to correspond to the type of the battery profile (PB).

[0062] FIG. 4 and FIG. 5 are diagrams illustrating a target current section (RT) included in the current profile (PC) of FIG. 3.

[0063] Specifically, in the embodiment of FIG. 4, the control unit (120) can set the reference value as an average value of multiple current values. Then, the control unit (120) can divide the entire current section of the battery profile (PB) into a first current section (RR1) and a second current section (RR2) based on the reference value. Then, since the battery profile (PB) of FIG. 2 is a discharge profile, the control unit (120) can set the first current section (RR1) as the target current section (RT).

[0064] The control unit (120) may be configured to filter the battery profile (PB) based on the time-dependent current change included in the target current section (RT).

[0065] Specifically, since the battery profile (PB) is a profile based on the time-dependent current change included in the entire current section, the control unit (120) can filter the battery profile (PB) based on the time-dependent current change included in the target current section (RT).

[0066] More specifically, the control unit (120) may filter the battery profile (PB) so that only the hourly current changes included in the target current section (RT) are reflected. For example, in the embodiments of FIGS. 4 and 5 , the control unit (120) may filter the battery profile (PB) so that only the hourly current changes included in the first current section (RR1) are reflected. That is, the filtered battery profile (PB) may not reflect the hourly current changes included in the second current section (RR2).

[0067] For example, the control unit (120) may be configured to first filter the battery profile (PB) based on the time-dependent current change included in the target current section (RT) to generate a filtered battery profile (PB_f1).

[0068] Thereafter, optionally, the control unit (120) may be configured to perform secondary filtering on the primary filtered battery profile (PB_f1) using a smoothing filter to generate a filtered battery profile (PB_f2). Here, the smoothing filter is a filter used to alleviate noise or smooth a trend of the battery profile (PB), and moving average, kernel density estimation, and Lowess (locally weighted scatterplot smoother) can be applied without limitation.

[0069] FIG. 6 and FIG. 7 are schematic diagrams illustrating a filtered battery profile (PB_f) according to one embodiment of the present invention.

[0070] Specifically, the battery profile (PB_f1) according to the embodiment of FIG. 6 is an embodiment in which the battery profile (PB) is first filtered, and the battery profile (BP_f2) according to the embodiment of FIG. 7 is an embodiment in which the first filtered battery profile (PB_f1) is second filtered.

[0071] The control unit (120) can remove noise included in the battery profile (PB) acquired by the profile acquisition unit (110) by filtering the battery profile (PB) based on the time-dependent current change included in the target current section (RT). That is, a filtered battery profile (PB_f1) can be generated based on the noise removal.

[0072] In addition, the control unit (120) can generate a battery profile (PB_f2) that can more accurately represent the state of the battery by smoothing the filtered battery profile (PB_f1). Here, it should be noted that the secondary filtering process based on the smoothing filter may be omitted at the user's discretion.

[0073] A battery profile generation device (100) according to one embodiment of the present invention can eliminate unnecessary noise contained in a battery profile (PB) by limiting the current section according to the type of battery profile (PB). Accordingly, the battery profile generation device (100) can generate a battery profile (PB_f) that more accurately reflects the current state of the battery.

[0074] For example, the generated battery profile (PB_f) can more accurately represent the correspondence between the capacity and voltage of the battery. Accordingly, according to the generated battery profile (PB_f), the state of charge (SOC), state of health (SOH), and state of power (SOP) of the battery, such as the state of x (SOX), can be more accurately estimated. Consequently, the battery profile generation device (100) has the advantage of improving the accuracy of battery state diagnosis by more accurately generating a battery profile (PB_f) that can be used to diagnose the state of the battery.

[0075]

[0076] Meanwhile, the profile acquisition unit (110) and the control unit (120) provided in the battery profile generation device (100) may optionally include a processor, an application-specific integrated circuit (ASIC), another chipset, a logic circuit, a register, a communication modem, a data processing device, etc. known in the art to execute various control logics performed in the present invention. In addition, when the control logic is implemented in software, the profile acquisition unit (110) and the control unit (120) may be implemented as a set of program modules. At this time, the program modules may be stored in a memory and executed by the profile acquisition unit (110) and the control unit (120). The memory may be located inside or outside the profile acquisition unit (110) and the control unit (120), and may be connected to the profile acquisition unit (110) and the control unit (120) by various well-known means.

[0077] In addition, the battery profile generation device (100) may further include a storage unit (130). The storage unit (130) may store data or programs required for each component of the battery profile generation device (100) to perform operations and functions, or data generated in the process of performing operations and functions. The storage unit (130) is not particularly limited in type as long as it is a known information storage means known to be capable of recording, erasing, updating, and reading data. As an example, the information storage means may include RAM, flash memory, ROM, EEPROM, registers, etc. In addition, the storage unit (130) may store program codes defining processes executable by the profile acquisition unit (110) and the control unit (120).

[0078] For example, the storage unit (130) can store a battery profile (PB), a current profile (PC), and a smoothing filter. In addition, the storage unit (130) can also store battery profiles (PB_f1, PB_f2) filtered by the control unit (120).

[0079]

[0080] Below, an embodiment in which the control unit (120) filters the battery profile (PB) is described in more detail.

[0081] The control unit (120) may be configured to filter the voltage by capacity included in the battery profile (PB) so that it corresponds to the time-dependent current change included in the target current section (RT).

[0082] Specifically, the control unit (120) can be configured to calculate a corrected voltage and a corrected capacity for each time based on the time-dependent current change included in the target current section (RT).

[0083] For example, the voltage and capacity included in the battery profile (PB) acquired by the profile acquisition unit (110) are based on the time-dependent current change included in the entire current section. That is, the correspondence between the voltage and capacity based on the time-dependent current change in the entire current section is shown in the battery profile (PB). In this case, the voltage and capacity based on the current value (noise) that does not correspond to the type of the battery profile (charge profile or discharge profile) may also be included in the battery profile (PB). Therefore, the control unit (120) can calculate the corrected voltage and the corrected capacity based on the time-dependent current change in the target current section (RT).

[0084] For example, in the embodiments of FIGS. 2 and 4, the voltage and capacity shown in the battery profile (PB) of FIG. 2 are based on the current values ​​included in the first current section (RR1) and the second current section (RR2). Here, since the battery profile (PB) is a discharge profile, the current value included in the second current section (RR2) may be noise. Accordingly, the control unit (120) can calculate the voltage change over time and the capacity change over time based on the current value included in the first current section (RR1).

[0085] Additionally, the control unit (120) may be configured to filter the battery profile (PB) based on the corrected voltage and the corrected capacity.

[0086] Specifically, the control unit (120) can filter the battery profile (PB) to indicate the correspondence between capacity and voltage by matching the hourly voltage change and hourly capacity change produced.

[0087] For example, the control unit (120) can filter the battery profile (PB) according to the embodiment of FIG. 2 to generate the battery profile (PB_f1) according to the embodiment of FIG. 6. Furthermore, the control unit (120) can further filter the battery profile (PB_f1) according to the embodiment of FIG. 6 to generate the battery profile (PB_f2) according to the embodiment of FIG. 7.

[0088]

[0089] The battery profile generation device (100) according to the present invention can be applied to a BMS (Battery Management System). That is, the BMS according to the present invention can include the above-described battery profile generation device (100). In this configuration, at least some of the components of the battery profile generation device (100) can be implemented by supplementing or adding functions of the components included in a conventional BMS. For example, the profile acquisition unit (110), the control unit (120), and the storage unit (130) of the battery profile generation device (100) can be implemented as components of the BMS.

[0090] Additionally, the battery profile generation device (100) according to the present invention may be provided in a battery pack. That is, the battery pack according to the present invention may include the battery profile generation device (100) described above and one or more battery cells. In addition, the battery pack may further include electrical components (relays, fuses, etc.) and a case.

[0091] FIG. 8 is a schematic drawing of a battery pack according to another embodiment of the present invention.

[0092] The positive terminal of the battery (11) can be connected to the positive terminal (P+) of the battery pack (10), and the negative terminal of the battery (11) can be connected to the negative terminal (P-) of the battery pack (10).

[0093] 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 a positive terminal of the battery (11) through the first sensing line (SL1), and can be connected to a negative terminal of the battery (11) through 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).

[0094] And, the measuring unit (12) can be connected to the current measuring unit (A) through the third sensing line (SL3). For example, the current measuring unit (A) can be an ammeter or a shunt resistor capable of measuring the charging current and discharging current of the battery (11). The measuring unit (12) can measure the charging current of the battery (11) through the third sensing line (SL3) to calculate the charging amount. In addition, the measuring unit (12) can measure the discharging current of the battery (11) through the third sensing line (SL3) to calculate the discharging amount.

[0095] For example, the profile acquisition unit (110) can receive battery information about the voltage and current of the battery from the measurement unit (12). Then, the profile acquisition unit (110) can generate a battery profile (PB) based on the battery information.

[0096] As another example, the profile acquisition unit (110) can receive a battery profile (PB) from the measurement unit (12).

[0097] An external device may be connected to the positive terminal (P+) and negative terminal (P-) of the battery pack (10). For example, the external device may 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) may be electrically connected.

[0098]

[0099] FIG. 9 is a schematic drawing of a vehicle (900) according to another embodiment of the present invention.

[0100] Referring to FIG. 9, a battery pack (910) according to an embodiment of the present invention may be included in a vehicle (900), such as an electric vehicle (EV) or a hybrid vehicle (HV). Furthermore, the battery pack (910) may drive the vehicle (900) by supplying power to a motor through an inverter provided in the vehicle (900). Here, the battery pack (910) may include a battery profile generation device (100). That is, the vehicle (900) may include a battery profile generation device (100). In this case, the battery profile generation device (100) may be an onboard device included in the vehicle (900).

[0101] For example, the battery profile generation device (100) can generate a battery profile (PB_f) that more accurately reflects the state of the battery pack (910) by filtering the battery profile (PB) obtained during the charging or discharging process of the battery pack (910).

[0102]

[0103] A battery diagnostic device (not shown) according to another embodiment of the present invention may include a communication unit and a processor.

[0104] The communication unit may be configured to obtain a battery profile (PB_f) generated by the battery profile generation device (100).

[0105] For example, the communication unit may be connected wired and / or wirelessly to enable communication with the battery profile generation device (100). In addition, the communication unit may receive a filtered battery profile (PB_f) from the battery profile generation device (100).

[0106] As another example, the communication unit may be connected wired and / or wirelessly to enable communication with a third device other than the battery profile generation device (100). In addition, the communication unit may receive a filtered battery profile (PB_f) from the third device.

[0107] The processor may be configured to diagnose the condition of the battery based on a battery profile (PB_f) obtained through the communication unit.

[0108] Specifically, the filtered battery profile (PB_f) is a noise-removed profile that can more accurately represent the battery's condition. Therefore, the processor can more accurately estimate the battery's SOX based on the filtered battery profile (PB_f). In other words, the battery's condition can be diagnosed more accurately.

[0109] Additionally, the battery diagnostic device can increase the expected lifespan of a battery by setting battery usage conditions corresponding to the estimated battery condition. For example, the battery diagnostic device can change and set usage conditions such as the critical temperature, critical SOC, critical voltage, and critical C-RATE for the battery.

[0110]

[0111] FIG. 10 is a diagram schematically illustrating a battery management method according to another embodiment of the present invention.

[0112] Referring to FIG. 10, a battery profile generation method may include a profile acquisition step (S100), a reference value setting step (S200), a target current range setting step (S300), and a filtering step (S400).

[0113] Preferably, each step of the battery profile generation method can be performed by the battery profile generation device (100). In the following, for convenience of explanation, any content that overlaps with the previously described content will be omitted or briefly described.

[0114] The profile acquisition step (S100) is a step of acquiring a battery profile (PB) indicating a correspondence between the capacity and voltage of a battery during a charge / discharge process and a current profile (PC) indicating a change in current over time, and can be performed by a profile acquisition unit (110).

[0115] In one embodiment, the profile acquisition unit (110) can directly receive the battery profile (PB) of the battery from the outside. That is, the profile acquisition unit (110) can acquire the battery profile (PB) by being connected to the outside via wire and / or wirelessly and receiving the battery profile (PB).

[0116] In another embodiment, the profile acquisition unit (110) may receive battery information regarding the voltage and capacity of the battery. Furthermore, the profile acquisition unit (110) may generate a battery profile (PB) based on the received battery information. That is, the profile acquisition unit (110) may directly generate the battery profile (PB) based on the battery information, thereby acquiring the battery profile (PB).

[0117] The reference value setting step (S200) is a step of setting a reference value based on multiple current values ​​included in the current profile (PC), and can be performed by the control unit (120).

[0118] Here, the reference value may mean a representative current value of the corresponding current profile (PC).

[0119] For example, the control unit (120) may be configured to set a value calculated by the average, median, mode, or a combination thereof of a plurality of current values ​​included in the current profile (PC) as a reference value. As a specific example, the control unit (120) may set the average, median, or mode of a plurality of current values ​​as a reference value, or may set an average value of two or more of the average, median, and mode as a reference value.

[0120] The target current section setting step (S300) is a step of setting a target current section (RT) among the entire current sections included in the current profile (PC) based on a reference value, and can be performed by the control unit (120).

[0121] For example, the control unit (120) may be configured to set a target current section (RT) that includes current values ​​that are lower than a reference value in the entire current section when the battery profile (PB) is a discharge profile.

[0122] As another example, the control unit (120) may be configured to set a target current section (RT) that includes current values ​​greater than or equal to a reference value in the entire current section when the battery profile (PB) is a charging profile.

[0123] The filtering step (S400) is a step of filtering the battery profile (PB) based on the time-dependent current change included in the target current section (RT), and can be performed by the control unit (120).

[0124] For example, the control unit (120) may be configured to first filter the battery profile (PB) based on the time-dependent current change included in the target current section (RT) to generate a filtered battery profile (PB_f1). Optionally, the control unit (120) may be configured to second-filter the first-filtered battery profile (PB_f1) using a smoothing filter to generate a filtered battery profile (PB_f2).

[0125]

[0126] The embodiments of the present invention described above are not implemented only through devices and methods, but may also be implemented through a program that realizes a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded, and such implementation can be easily implemented by an expert in the technical field to which the present invention belongs based on the description of the embodiments described above.

[0127] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0128] In addition, the present invention described above is not limited to the above-described embodiments and the attached drawings, and all or part of each embodiment may be selectively combined and configured so that various modifications can be made, as those skilled in the art can make various substitutions, modifications, and changes within the scope of the technical idea of ​​the present invention.

[0129] (Explanation of symbols)

[0130] 10: Battery pack

[0131] 11: Battery

[0132] 12: Measurement section

[0133] 100: Battery Profile Generator

[0134] 110: Profile acquisition section

[0135] 120: Control unit

[0136] 130: Storage

[0137] 900: Car

[0138] 910: Battery Pack

Claims

1. A profile acquisition unit configured to acquire a battery profile indicating the correspondence between the capacity and voltage of the battery during the charging and discharging process and a current profile indicating the change in current over time; and A battery profile generation device comprising a control unit configured to set a reference value based on a plurality of current values ​​included in the current profile, set a target current section among the entire current section included in the current profile based on the reference value, and filter the battery profile based on the time-dependent current change included in the target current section.

2. In paragraph 1, The above control unit, A battery profile generation device configured to set a target current section including current values ​​lower than or equal to the reference value in the entire current section when the battery profile is a discharge profile, and to filter the discharge profile based on the target current section.

3. In paragraph 1, The above control unit, A battery profile generation device configured to set a target current section including current values ​​greater than or equal to the reference value in the entire current section when the battery profile is a charging profile, and to filter the charging profile based on the target current section.

4. In paragraph 1, The above control unit, A battery profile generation device configured to filter the voltage by capacity included in the above battery profile so as to correspond to the time-based current change included in the above target current section.

5. In paragraph 4, The above control unit, A battery profile generation device configured to calculate a corrected voltage and a corrected capacity for each time based on the hourly current change included in the target current section, and to filter the battery profile based on the corrected voltage and the corrected capacity.

6. In paragraph 1, The above control unit, A battery profile generation device configured to first filter the battery profile based on the hourly current change included in the target current section, and secondarily filter the first-filtered battery profile using a smoothing filter.

7. In paragraph 1, The above control unit, A battery profile generation device configured to set the average, median, mode, or a combination thereof of a plurality of current values ​​included in the current profile as the reference value.

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

9. A vehicle including a battery profile generating device according to any one of claims 1 to 7.

10. A communication unit configured to obtain a battery profile generated by a battery profile generating device according to any one of claims 1 to 7; and A battery diagnostic device including a processor configured to diagnose the state of the battery based on a battery profile obtained through the communication unit.

11. A profile acquisition step for acquiring a battery profile indicating the correspondence between the capacity and voltage of the battery during the charging and discharging process and a current profile indicating the change in current over time; A reference value setting step for setting a reference value based on a plurality of current values ​​included in the above current profile; A target current section setting step for setting a target current section among the entire current sections included in the current profile based on the above reference value; and A battery profile generation method comprising a filtering step of filtering the battery profile based on the hourly current change included in the target current section.

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