Devices and methods for generating battery information

Abstract

The invention relates to a battery information generating device comprising: a structured characteristic curve receiver for acquiring a differential characteristic curve representing the relationship between voltage and differential capacity of the battery; and a structured controller for determining the target C ratio corresponding to the differential characteristic curve and generating the corrected characteristic curve by correcting the differential characteristic curve based on the overvoltage characteristic curve corresponding to the target C ratio.

Description

Battery information generation device and method

[0001] This application claims priority to Korean Patent Application No. 10-2024-0012347, filed on January 26, 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 information generation device and method, and more particularly, to a battery information generation device and method that efficiently generates information related to 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] Traditionally, battery condition has been diagnosed by analyzing a battery profile, which indicates the relationship between battery voltage and capacity. For example, capacity and voltage are measured during the battery charging process, and the battery condition is diagnosed by analyzing the battery profile, which indicates the relationship between the measured voltage and capacity. Alternatively, battery condition can be diagnosed based on capacity and voltage measured during the battery discharge process.

[0007] Here, to more accurately diagnose the current state of the battery, a battery profile that accurately reflects the current state of the battery is required. However, obtaining such a profile requires low-rate charging / discharging, such as 0.05C (C-rate). In other words, because low-rate charging / discharging was previously required to diagnose the battery's condition, diagnosing the battery's condition was limited.

[0008] For example, when charging and discharging a battery at rates exceeding 0.33C, the resulting profile may include overpotential, which may not accurately reflect the battery's current condition. Because of this, there is concern that using a profile that includes overpotential may result in an inaccurate diagnosis of the battery's condition. Therefore, low-rate charging and discharging are required to accurately diagnose the battery's condition.

[0009] The present invention has been devised to solve the above problems, and its purpose is to provide a battery information generation device and method that quickly generates a profile used for battery condition diagnosis.

[0010] 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.

[0011] A battery information generation device according to one aspect of the present invention may include a profile acquisition unit configured to acquire a battery profile based on a voltage and a battery capacity of a battery; and a control unit configured to determine a target C-rate corresponding to the battery profile and generate a correction profile by correcting the battery profile based on an overvoltage profile corresponding to the target C-rate.

[0012] The control unit may be configured to generate the correction profile by calculating a difference between the battery profile and the overvoltage profile.

[0013] The above overvoltage profile can be configured to be pre-saved for each of a plurality of C-rates.

[0014] The above control unit may be configured to select an overvoltage profile corresponding to the target C-rate from among a plurality of pre-stored overvoltage profiles.

[0015] The above overvoltage profile can be preset based on a reference battery profile of the reference battery for the reference C-rate and a target battery profile of the reference battery for the target C-rate.

[0016] The above overvoltage profile may be preset to represent a difference between the reference battery profile and the target battery profile.

[0017] The above target C-rate can be set to be greater than the above reference C-rate.

[0018] The above control unit may be configured to provide information about the battery by outputting the correction profile to the outside.

[0019] A battery pack according to another aspect of the present invention may include a battery information generating device according to one aspect of the present invention.

[0020] A vehicle according to another aspect of the present invention may include a battery information generating device according to one aspect of the present invention.

[0021] A method for generating battery information according to another aspect of the present invention may include a profile acquisition step of acquiring a battery profile based on a voltage and a battery capacity of a battery; a target determination step of determining a target C-rate corresponding to the battery profile; and a correction profile generation step of generating a correction profile by correcting the battery profile based on an overvoltage profile corresponding to the target C-rate.

[0022] According to one aspect of the present invention, a battery information generation device can drastically reduce the total time required for diagnosing the condition of a battery by quickly generating a correction profile used for diagnosing the condition of a battery.

[0023] 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.

[0024] 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.

[0025] FIG. 1 is a schematic diagram illustrating a battery information generation device according to one embodiment of the present invention.

[0026] FIG. 2 is a schematic diagram illustrating a first embodiment of a battery profile according to one embodiment of the present invention.

[0027] FIG. 3 is a schematic diagram illustrating a second embodiment of a battery profile according to one embodiment of the present invention.

[0028] FIG. 4 is a schematic diagram illustrating a third embodiment of a battery profile according to one embodiment of the present invention.

[0029] FIG. 5 is a diagram schematically illustrating an overvoltage profile according to one embodiment of the present invention.

[0030] Figures 6 and 7 are schematic drawings illustrating a correction profile according to one embodiment of the present invention.

[0031] FIG. 8 is a schematic drawing of a battery pack according to another embodiment of the present invention.

[0032] FIG. 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.

[0033] FIG. 10 is a diagram schematically illustrating a battery information generation method according to another embodiment of the present invention.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040]

[0041] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0042] FIG. 1 is a schematic diagram illustrating a battery information generation device (100) according to one embodiment of the present invention.

[0043] Referring to FIG. 1, a battery information generation device (100) may include a profile acquisition unit (110), a control unit (120), and a storage unit (130).

[0044] Here, a battery refers to 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 type, a prismatic type, or a pouch type. Furthermore, a battery may also refer to a battery bank, a battery module, or a 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.

[0045] The profile acquisition unit (110) can be configured to acquire a battery profile based on the voltage and capacity of the battery.

[0046] Specifically, the battery profile may include at least one of a full-cell profile indicating a correspondence between a voltage and a capacity of the battery, a first differential profile indicating a correspondence between a capacity of the battery and a differential voltage, and a second differential profile indicating a correspondence between a voltage and a differential capacity of the battery.

[0047] FIG. 2 is a schematic diagram illustrating a first embodiment of a battery profile according to one embodiment of the present invention. Specifically, FIG. 2 is a schematic diagram illustrating a full-cell profile (BP) of a battery. The full-cell profile (BP) can be expressed as an XY graph in which the X-axis is set to capacity (Q) and the Y-axis is set to voltage (V).

[0048] A full-cell profile (BP) is a profile that represents the relationship between voltage (V) and capacity (Q) when the battery's SOC is charged from a preset start SOC or 0% to a preset end SOC or 100%. Alternatively, a full-cell profile (BP) can represent the relationship between voltage (V) and capacity (Q) when the battery's SOC is discharged from a preset start SOC or 100% to a preset end SOC or 0%.

[0049] Fig. 3 is a schematic diagram illustrating a second embodiment of a battery profile according to one embodiment of the present invention. Specifically, Fig. 3 is a diagram schematically illustrating a first differential profile (DP1) of a battery. The first differential profile (DP1) can be expressed as an XY graph in which the X-axis is set to capacity (Q) and the Y-axis is set to differential voltage (dV / dQ).

[0050] When the full cell profile (BP) is differentiated with respect to capacity, a first differential profile (DP1) can be generated that represents the correspondence between the differential voltage (dV / dQ) and the capacity (Q). Here, the differential voltage is the derivative of the voltage with respect to the capacity, which is the value obtained by differentiating the voltage with respect to the capacity.

[0051] Fig. 4 is a schematic diagram illustrating a third embodiment of a battery profile according to one embodiment of the present invention. Specifically, Fig. 4 is a schematic diagram illustrating a second differential profile (DP2) of a battery. The second differential profile (DP2) can be expressed as an XY graph in which the X-axis is set to voltage (V) and the Y-axis is set to differential capacity (dQ / dV).

[0052] When the full cell profile (BP) is differentiated with respect to voltage, a second differential profile (DP2) can be generated that represents the correspondence between the differential capacitance (dQ / dV) and the voltage (V). Here, the differential capacitance is the derivative of the capacitance with respect to the voltage, which is the value obtained by differentiating the capacitance with respect to the voltage.

[0053] For example, the profile acquisition unit (110) can directly receive a battery profile from an external source. That is, the profile acquisition unit (110) can acquire a battery profile by receiving the battery profile from an external source that is connected to enable wired and / or wireless communication.

[0054] As another example, the profile acquisition unit (110) can directly receive the full-cell profile (BP) of the battery from the outside. Then, the profile acquisition unit (110) can generate differential profiles (DP1, DP2) based on the full-cell profile (BP). That is, the profile acquisition unit (110) can receive the full-cell profile (BP) from the outside that is connected to enable wired and / or wireless communication, and directly generate the differential profiles (DP1, DP2) from the full-cell profile (BP), thereby acquiring the differential profiles (DP1, DP2).

[0055] As another example, the profile acquisition unit (110) can receive battery information regarding the voltage and capacity of the battery. Furthermore, the profile acquisition unit (110) can generate a full-cell profile (BP) based on the received battery information, and generate differential profiles (DP1, DP2) based on the generated full-cell profile (BP). In other words, the profile acquisition unit (110) can acquire a battery profile by directly generating the full-cell profile (BP) and differential profiles (DP1, DP2) based on the battery information.

[0056] 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 (110) may transmit the acquired battery profile to the control unit (120).

[0057] The control unit (120) may be configured to determine a target C-rate corresponding to the battery profile.

[0058] Specifically, the control unit (120) can obtain information on a target C-rate corresponding to the battery profile from the profile acquisition unit (110).

[0059] For example, assume that the battery is charged at 0.33 C. In this case, the target C-rate corresponding to the battery profile is 0.33 C. The control unit (120) can receive information about the battery profile and 0.33 C from the profile acquisition unit (110). Then, the control unit (120) can determine 0.33 C corresponding to the battery profile as the target C-rate.

[0060] The control unit (120) may be configured to generate a correction profile by correcting the battery profile based on an overvoltage profile corresponding to the target C-rate.

[0061] Specifically, the overvoltage profile may be preset to represent an overvoltage portion included in the battery profile. More specifically, the overvoltage profile may be preset based on a reference battery profile of a reference battery for a reference C-rate and a target battery profile of the reference battery for a target C-rate. Preferably, the target C-rate may be set to be greater than the reference C-rate. That is, the overvoltage profile may be preset to represent a difference between the reference battery profile and the target battery profile.

[0062] For example, it is assumed that the reference C-rate is 0.05C and the target C-rate is 0.33C. When the reference battery is charged (or discharged) at 0.05C, the reference battery profile can be acquired. And, when the reference battery is charged (or discharged) at 0.33C, the target battery profile can be acquired. And, an overvoltage profile corresponding to 0.33C can be generated according to the difference between the reference battery profile and the target battery profile. In general, when a battery is charged and discharged at a target C-rate greater than the reference C-rate, an overvoltage may be included in the measured voltage of the battery. Therefore, the control unit (120) can generate an overvoltage profile by removing the reference battery profile based on the reference C-rate from the target battery profile based on the target C-rate.

[0063] FIG. 5 is a schematic diagram illustrating an overvoltage profile (OP) according to one embodiment of the present invention. Specifically, FIG. 5 is an overvoltage profile (OP) corresponding to a first differential profile (DP1).

[0064] For example, the overvoltage profile (OP) according to the embodiment of FIG. 5 can be expressed as an XY graph in which the X-axis is set to capacity and the Y-axis is set to differential voltage. That is, if the battery profile acquired by the profile acquisition unit (110) is the first differential profile (DP1), the overvoltage profile (OP) can represent a correspondence between the capacity and differential voltage.

[0065] As another example, the overvoltage profile corresponding to the second differential profile (DP2) can be expressed as an XY graph in which the X-axis is set to voltage and the Y-axis is set to differential capacitance. That is, if the differential profile acquired by the profile acquisition unit (110) is the second differential profile (DP2), the overvoltage profile can represent the correspondence between voltage and differential capacitance.

[0066] As another example, an overvoltage profile corresponding to a full-cell profile (BP) can be expressed as an XY graph in which the X-axis is set to capacity and the Y-axis is set to voltage. That is, if the battery profile acquired by the profile acquisition unit (110) is a full-cell profile (BP), the overvoltage profile can represent the correspondence between capacity and voltage.

[0067] In addition, the control unit (120) can be configured to select an overvoltage profile (OP) corresponding to the target C-rate from among a plurality of pre-stored overvoltage profiles (OP).

[0068] Overvoltage profiles (OPs) can be configured to be pre-stored for each of multiple C-rates.

[0069] Specifically, multiple overvoltage profiles (OPs) are provided, and the C-rates corresponding to each of the multiple overvoltage profiles (OPs) may be different. For example, based on a unit C-rate, an overvoltage profile (OP) corresponding to each C-rate may be stored in advance.

[0070] In addition, an overvoltage profile (OP) for a C-rate that has not been experimentally obtained can be obtained and stored through interpolation or extrapolation between similar overvoltage profiles (OP). Specifically, the control unit (120) can generate overvoltage profiles (OP) for various C-rates in addition to the pre-stored overvoltage profiles (OP) through interpolation or extrapolation, and store the generated overvoltage profiles (OP) in the storage unit (130). For example, if an overvoltage profile (OP) corresponding to 1C and an overvoltage profile (OP) corresponding to 1.2C are pre-stored, an overvoltage profile (OP) corresponding to 1.1C can be further obtained based on the difference between the two overvoltage profiles (OP).

[0071] The control unit (120) may be configured to generate a correction profile by calculating the difference between the battery profile and the overvoltage profile (OP).

[0072] Specifically, the control unit (120) can generate a correction profile by calculating the difference between the battery profile and the overvoltage profile (OP) in the same way that the overvoltage profile (OP) is generated based on the difference between the reference battery profile and the target battery profile.

[0073] For example, if the battery profile is a full cell profile (BP), the control unit (120) can generate a correction profile by calculating the voltage difference by capacity between the full cell profile (BP) and the overvoltage profile (OP).

[0074] As another example, if the battery profile is a first differential profile (DP1), the control unit (120) can generate a correction profile by calculating the capacity-specific differential voltage difference between the first differential profile (DP1) and the overvoltage profile (OP).

[0075] As another example, if the battery profile is a second differential profile (DP2), the control unit (120) can generate a correction profile by calculating the voltage-dependent differential capacity difference between the second differential profile (DP2) and the overvoltage profile (OP).

[0076] Figures 6 and 7 are schematic drawings illustrating a correction profile according to one embodiment of the present invention.

[0077] Specifically, FIG. 6 is a diagram illustrating a correction profile corresponding to the first differential profile (DP1). In the embodiments of FIGS. 5 and 6, the correction profile (CP) can be generated according to the differential voltage difference by capacity of the overvoltage profile (OP) corresponding to the first differential profile (DP1). That is, the control unit (120) can generate a correction profile (CP) from which the overvoltage portion included in the first differential profile (DP1) is removed by calculating the difference between the first differential profile (DP1) and the overvoltage profile (OP).

[0078] Specifically, Fig. 7 is a drawing illustrating a correction profile corresponding to the second differential profile (DP2). In the embodiment of Fig. 7, the correction profile (CP) can be generated according to the voltage-dependent differential capacity difference between the second differential profile (DP2) and the corresponding overvoltage profile (not shown). That is, the control unit (120) can generate a correction profile from which the overvoltage portion included in the second differential profile (DP2) is removed by calculating the difference between the second differential profile (DP2) and the overvoltage profile.

[0079] According to one embodiment of the present invention, since charging and discharging the battery at a low C-rate (e.g., 0.05 C) is not required to obtain an accurate profile for the battery, a compensation profile (CP) with overvoltage removed can be quickly obtained. Furthermore, since the compensation profile (CP) is used to diagnose the condition of the battery, the battery information generation device (100) has the advantage of being able to quickly generate a profile used for battery diagnosis.

[0080] For example, if a low-rate charge / discharge of 0.05C is forced to obtain a full-cell profile (BP) as in the conventional method, it may take approximately 20 hours just to obtain the full-cell profile (BP). Furthermore, additional time may be required to convert the obtained full-cell profile (BP) into differential profiles (DP1, DP2). In other words, since the conventional method requires a considerable amount of time to obtain the full-cell profile (BP), there is a problem in that the battery's condition cannot be quickly diagnosed.

[0081] On the other hand, if the battery is charged and discharged at 0.33C as in one embodiment of the present invention, a full cell profile (BP) can be obtained in approximately 3 hours. That is, according to one embodiment of the present invention, the time required to obtain a full cell profile (BP) can be drastically reduced compared to conventional methods.

[0082] However, the full-cell profile (BP) obtained according to one embodiment of the present invention includes an overvoltage corresponding to noise. Therefore, the battery information generation device (100) can quickly remove noise included in the battery profile by calculating the difference between the battery profile and the overvoltage profile. Therefore, even if the time required for the process of generating the correction profile (CP) is further considered, the battery information generation device (100) has the advantage of being able to generate a profile capable of diagnosing the state of the battery much more quickly than conventional methods.

[0083]

[0084] Meanwhile, the profile acquisition unit (110) and / or control unit (120) provided in the battery information 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 as 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 / or the control unit (120). The memory may be located inside or outside the profile acquisition unit (110) and / or the control unit (120), and may be connected to the profile acquisition unit (110) and / or the control unit (120) by various well-known means.

[0085] In addition, the battery information 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 information 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 / or the control unit (120).

[0086] The storage unit (130) can store a full cell profile (BP), differential profiles (DP1, DP2), overvoltage profile (OP), and correction profile (CP).

[0087]

[0088] In one embodiment, the profile acquisition unit (110) may be configured to acquire a full-cell profile (BP) indicating a correspondence between capacity and voltage. The control unit (120) may be configured to correct the full-cell profile (BP) based on an overvoltage profile (OP) indicating a correspondence between capacity and voltage.

[0089] In another embodiment, the profile acquisition unit (110) may be configured to acquire a first differential profile (DP1) indicating a correspondence between a capacity and a differential voltage. The control unit (120) may be configured to correct the first differential profile (DP1) based on an overvoltage profile (OP) indicating a correspondence between a capacity and a differential voltage.

[0090] In another embodiment, the profile acquisition unit (110) may be configured to acquire a second differential profile (DP2) indicating a correspondence between voltage and differential capacitance. The control unit (120) may be configured to correct the second differential profile (DP2) based on the overvoltage profile indicating a correspondence between voltage and differential capacitance.

[0091] Specifically, since the difference between the battery profile and the overvoltage profile (OP) must be calculated in order to generate the compensation profile (CP), the formats of the battery profile and the overvoltage profile (OP) may be identical.

[0092] That is, if the battery profile represents a correspondence between capacity and voltage, the overvoltage profile (OP) can also represent a correspondence between capacity and voltage. Furthermore, if the battery profile represents a correspondence between capacity and differential voltage, the overvoltage profile (OP) can also represent a correspondence between capacity and differential voltage. Finally, if the battery profile represents a correspondence between voltage and differential capacity, the overvoltage profile (OP) can also represent a correspondence between voltage and differential capacity.

[0093]

[0094] The control unit (120) can be configured to provide information about the battery by outputting a correction profile (CP) to the outside.

[0095] Specifically, the control unit (120) may be connected to an external device capable of diagnosing the condition of a battery based on a correction profile (CP) and communicate with it via wired and / or wireless communication. The control unit (120) may transmit the correction profile (CP) to the external device via wired and / or wireless communication. For example, the external device may include a diagnostic device or a server, and any device capable of diagnosing the condition of a battery by analyzing a correction profile (CP) may be applied without limitation.

[0096] Since the calibration profile (CP) is a profile that represents the current status of the battery, the status of the battery can be diagnosed based on the calibration profile (CP).

[0097] For example, if the calibration profile (CP) corresponds to the full-cell profile (BP), the correlation between the battery's voltage and capacity can be more accurately represented based on the calibration profile (CP). Therefore, the battery's condition can be more accurately diagnosed based on the battery's voltage, capacity, and various factors based on these factors.

[0098] As another example, when the correction profile (CP) corresponds to the differential profiles (DP1, DP2), the condition of the battery can be diagnosed based on the behavior of the peak included in the correction profile (CP). Here, the peak means a maximum or minimum point of the correction profile (CP). If the condition of the battery is diagnosed based on the differential profile including the overvoltage, the condition of the battery may not be accurately diagnosed due to the influence of the overvoltage. However, since the battery information generation device (100) generates a correction profile (CP) with the overvoltage included in the differential profile removed, the condition of the battery can be diagnosed more accurately based on the correction profile (CP). That is, the battery information generation device (100) can drastically reduce the total time required for diagnosing the condition of the battery by quickly generating the correction profile (CP) used for diagnosing the condition of the battery.

[0099]

[0100] The battery information 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 battery information generation device (100) described above. In this configuration, at least some of the components of the battery information generation device (100) can be implemented by supplementing or adding to the 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 information generation device (100) can be implemented as components of the BMS.

[0101] Additionally, the battery information 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 information 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.

[0102] FIG. 8 is a schematic drawing of a battery pack (10) according to another embodiment of the present invention.

[0103] 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).

[0104] 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).

[0105] 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.

[0106] For example, the profile acquisition unit (110) can receive battery information about the voltage and capacity of the battery from the measurement unit (12). Then, the profile acquisition unit (110) can generate a battery profile based on the battery information.

[0107] As another example, the profile acquisition unit (110) can receive a battery profile from the measurement unit (12).

[0108] 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.

[0109]

[0110] FIG. 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.

[0111] Referring to FIG. 9, a battery pack 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 information generation device (100). That is, the vehicle (900) may include a battery information generation device (100). In this case, the battery information generation device (100) may be an onboard device included in the vehicle (900).

[0112]

[0113] FIG. 10 is a diagram schematically illustrating a battery information generation method according to another embodiment of the present invention.

[0114] Referring to FIG. 10, a battery information generation method may include a profile acquisition step (S100), a target determination step (S200), and a correction profile generation step (S300).

[0115] Preferably, each step of the battery information generation method can be performed by the battery information 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.

[0116] The profile acquisition step (S100) is a step of acquiring a battery profile based on the voltage and capacity of the battery, and can be performed by the profile acquisition unit (110).

[0117] For example, the profile acquisition unit (110) can acquire at least one of a full cell profile (BP), a first differential profile (DP1), and a second differential profile (DP2).

[0118] The target determination step (S200) is a step of determining a target C-rate corresponding to the battery profile, and can be performed by the control unit (120).

[0119] For example, the control unit (120) can receive information about the battery profile and C-rate from the profile acquisition unit (110). Then, the control unit (120) can determine the C-rate corresponding to the battery profile as the target C-rate.

[0120] The correction profile generation step (S300) is a step of generating a correction profile (CP) by correcting a battery profile based on an overvoltage profile (OP) corresponding to a target C-rate, and can be performed by the control unit (120).

[0121] In addition, the control unit (120) may be configured to select an overvoltage profile (OP) corresponding to a target C-rate from among a plurality of pre-stored overvoltage profiles (OP). The control unit (120) may be configured to generate a correction profile (CP) by calculating the difference between the battery profile and the overvoltage profile (OP).

[0122] For example, if the battery profile is a full cell profile (BP), the control unit (120) can generate a correction profile (CP) by calculating the voltage difference by capacity between the full cell profile (BP) and the overvoltage profile (OP).

[0123] As another example, if the battery profile is a first differential profile (DP1), the control unit (120) can generate a correction profile (CP) by calculating the differential voltage difference by capacity between the first differential profile (DP1) and the overvoltage profile (OP).

[0124] As another example, if the battery profile is a second differential profile (DP2), the control unit (120) can generate a correction profile by calculating the voltage-dependent differential capacity difference between the second differential profile (DP2) and the overvoltage profile.

[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]

[0130] (Explanation of symbols)

[0131] 10: Battery pack

[0132] 11: Battery

[0133] 12: Measurement section

[0134] 100: Battery information generation device

[0135] 110: Profile acquisition section

[0136] 120: Control unit

[0137] 130: Storage

[0138] 900: Car

[0139] 910: Battery Pack

Claims

1. A profile acquisition unit configured to acquire a battery profile based on the voltage and capacity of the battery; and A battery information generation device characterized by including a control unit configured to generate a correction profile by determining a target C-rate corresponding to the battery profile and correcting the battery profile based on an overvoltage profile corresponding to the target C-rate.

2. In paragraph 1, The above control unit, A battery information generation device configured to generate the compensation profile by calculating the difference between the battery profile and the overvoltage profile.

3. In paragraph 1, The above overvoltage profile is configured to be stored in advance for each of a plurality of C-rates, The above control unit, A battery information generation device characterized in that it is configured to select an overvoltage profile corresponding to the target C-rate from among a plurality of pre-stored overvoltage profiles.

4. In paragraph 1, The above overvoltage profile is, A battery information generation device characterized in that it is preset based on a reference battery profile of a reference battery for a reference C-rate and a target battery profile of the reference battery for the target C-rate.

5. In paragraph 4, The above overvoltage profile is, A battery information generation device characterized in that it is preset to indicate the difference between the reference battery profile and the target battery profile.

6. In paragraph 4, The above target C-rate is, A battery information generation device characterized in that it is set to be greater than the above-mentioned standard C-rate.

7. In paragraph 1, The above control unit, A battery information generation device characterized in that it is configured to provide information about the battery by outputting the above correction profile to the outside.

8. A battery pack including a battery information generation device according to any one of claims 1 to 7.

9. A vehicle including a battery information generation device according to any one of paragraphs 1 to 7.

10. Profile acquisition step for acquiring a battery profile based on the voltage and capacity of the battery; A target determination step for determining a target C-rate corresponding to the above battery profile; and A battery information generation method, characterized in that it includes a correction profile generation step of generating a correction profile by correcting the battery profile based on an overvoltage profile corresponding to the target C-rate.

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