EQUIPMENT AND METHODS FOR GENERATING BATTERY INFORMATION

Abstract

According to one designation, the invention relates to a battery information generating device comprising: a characteristic curve acquisition unit for acquiring a differential characteristic curve showing the correspondence between the battery's capacity and differential voltage; and a control unit that determines the target current velocity C corresponding to the differential characteristic curve, and corrects the differential characteristic curve based on the overvoltage characteristic curve corresponding to the target current velocity C, thereby generating a corrected characteristic curve.

Description

Battery information generation device and method

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0012348, filed January 26, 2024, the entire contents of which 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 capacity and voltage. 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 capacity and voltage. 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 battery condition, a battery profile that accurately reflects the battery's current condition is required. However, obtaining such a battery profile requires a low-rate charge / discharge, such as 0.05C (C-rate). In other words, because low-rate charge / discharge was previously required to diagnose the battery's condition, diagnosis was limited.

[0008] For example, when charging and discharging a battery at a C-rate of 0.33C or higher, the resulting battery profile may not accurately reflect the current battery condition due to the overpotential. When using a battery profile that includes overpotential, the battery condition may not be accurately diagnosed, leading to the problem of low-rate charging and discharging being required to accurately diagnose the battery condition.

[0009] In one embodiment of the present invention, a battery information generation device and method are provided for quickly generating a profile used for battery condition diagnosis.

[0010] Various aspects of the present invention can be understood through the following description and will be further clarified by the embodiments of the present invention. Furthermore, it will be readily apparent that various aspects 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 differential profile indicating a correspondence between a capacity of a battery and a differential voltage; and a control unit configured to determine a target C-rate (Current-rate) corresponding to the differential profile and generate a correction profile by correcting the differential 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 the difference between the differential 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 differential profile of the reference battery for the reference C-rate and a target differential profile of the reference battery for the target C-rate.

[0016] The above overvoltage profile can be preset to represent the difference between the reference differential profile and the target differential 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 battery information generation method according to another aspect of the present invention may include a profile acquisition step of acquiring a differential profile indicating a correspondence between a capacity of a battery and a differential voltage; a target determination step of determining a target C-rate corresponding to the differential profile; and a correction profile generation step of generating a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target C-rate.

[0022] According to another aspect of the present invention, a non-transitory readable storage medium may store a program for executing a battery information generation method, the method including: a profile acquisition step of acquiring a differential profile indicating a correspondence between a capacity of a battery and a differential voltage; a target determination step of determining a target C-rate corresponding to the differential profile; and a correction profile generation step of generating a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target C-rate.

[0023] According to one aspect of the present invention, a battery information generation device can reduce the total time required for diagnosing the condition of a battery by relatively quickly generating a correction profile used for diagnosing the condition of a battery.

[0024] 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.

[0025] 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.

[0026] FIG. 1 is a schematic diagram illustrating a battery information generation device according to one embodiment of the present invention.

[0027] FIG. 2 is a diagram schematically illustrating a battery profile according to one embodiment of the present invention.

[0028] FIG. 3 is a schematic diagram illustrating a first differential profile according to one embodiment of the present invention.

[0029] FIG. 4 is a schematic diagram illustrating a second differential profile according to one embodiment of the present invention.

[0030] FIG. 5 is a diagram schematically illustrating an overvoltage profile according to one embodiment of the present invention.

[0031] FIG. 6 is a drawing schematically illustrating a correction profile according to one embodiment of the present invention.

[0032] FIG. 7 is a diagram schematically illustrating a correction profile according to one embodiment of the present invention.

[0033] FIG. 8 is a schematic drawing of a battery pack according to another embodiment of the present invention.

[0034] FIG. 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.

[0035] FIG. 10 is a diagram schematically illustrating a battery information generation method according to another embodiment of the present invention.

[0036] 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.

[0037] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely 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.

[0038] In addition, when describing the present invention, if it is determined that the description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

[0039] 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.

[0040] 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.

[0041] 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.

[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] A battery may refer 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 cylindrical, prismatic, or pouch-shaped. Furthermore, a battery may 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 as referring to a single, independent cell.

[0045] The profile acquisition unit (110) can be configured to acquire a differential profile indicating a correspondence between the capacity of the battery and the differential voltage.

[0046] For example, a battery profile (BP) is a profile that represents the relationship between voltage (V) and capacity (Q) when the battery's State of Charge (SOC) is charged from a preset start SOC or 0% to a preset end SOC or 100%. As another example, a battery profile (BP) may 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%.

[0047] FIG. 2 is a schematic diagram illustrating a battery profile (BP) according to one embodiment of the present invention. The battery 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). The voltage range of the battery is Vi to Vf, and the capacity range of the battery is Qi to Qf.

[0048] Furthermore, when the battery profile (BP) is differentiated with respect to capacity, a differential profile representing the correspondence between differential voltage (dV / dQ) and capacity (Q) can be generated. The differential voltage is the differential value of voltage with respect to capacity, and is the value obtained by differentiating voltage with respect to capacity. Hereinafter, this differential profile obtained by differentiating voltage with respect to capacity is referred to as the first differential profile (DP1).

[0049] Fig. 3 is a schematic diagram illustrating a first differential profile (DP1) according to one embodiment of the present invention. 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] Furthermore, when the battery profile (BP) is differentiated with respect to voltage, a differential profile representing the correspondence between the differential capacity (dQ / dV) and the voltage (V) can be generated. Here, the differential capacity is the differential value of the capacity with respect to the voltage, and is the value obtained by differentiating the capacity with respect to the voltage. Hereinafter, this differential profile obtained by differentiating the capacity with respect to the voltage is referred to as the second differential profile (DP2).

[0051] Fig. 4 is a schematic diagram illustrating a second differential profile (DP2) according to one embodiment of the present invention. 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 capacitance (dQ / dV).

[0052] For example, there are no specific restrictions on the current rate (C-rate) during charging or discharging to generate a battery profile (BP). To obtain more accurate battery profiles (BP) and differential profiles, the battery can be charged or discharged at a low rate. For example, a battery profile (BP) can be generated during the process of charging or discharging the battery at a low rate, such as 0.05C.

[0053] For example, the profile acquisition unit (110) can directly receive the differential profile of the battery from an external source. For example, the profile acquisition unit (110) can acquire the differential profile by receiving the differential profile through a wired and / or wireless connection to the external source.

[0054] As another example, the profile acquisition unit (110) can directly receive the battery profile (BP) of the battery from an external source. Furthermore, the profile acquisition unit (110) can generate a differential profile based on the received battery profile (BP). For example, the profile acquisition unit (110) can be connected to the external source via wires and / or wirelessly to receive the battery profile (BP) and directly generate a differential profile from the received battery profile (BP), thereby acquiring the differential profile.

[0055] As another example, 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 (BP) based on the received battery information, and may generate a differential profile based on the generated battery profile (BP). The profile acquisition unit (110) may acquire the differential profile by directly generating the differential profile based on the received 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) via wire and / or wirelessly. The profile acquisition unit (110) may transmit the acquired differential profile to the control unit (120).

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

[0058] Additionally, the control unit (120) can obtain information about the target C-rate corresponding to the differential profile from the profile acquisition unit (110).

[0059] For example, when the battery is charged at 0.33 C, the target C-rate corresponding to the differential profile may be 0.33 C. The control unit (120) may receive information about the differential profile and 0.33 C from the profile acquisition unit (110). Then, the control unit (120) may determine 0.33 C corresponding to the differential profile as the target C-rate.

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

[0061] The overvoltage profile (OP) may be preset to represent an overvoltage portion included in the differential profile. For example, the overvoltage profile (OP) may be preset based on a reference differential profile of a reference battery for a reference C-rate and a target differential profile of the reference battery for a target C-rate. The target C-rate may be set to be greater than the reference C-rate. In one embodiment, the overvoltage profile (OP) may be preset to represent a difference between the reference differential profile and the target differential profile.

[0062] For example, assume 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, a reference battery profile for the reference C-rate is acquired, and a reference differential profile can be acquired based on the reference battery profile. Then, when the reference battery is charged (or discharged) at 0.33C, a target battery profile for the target C-rate is acquired, and a target differential profile can be acquired based on the target battery profile. Then, an overvoltage profile (OP) corresponding to a C-rate of 0.33C can be generated based on the difference between the reference differential profile and the target differential profile. When the battery is charged (or discharged) at a target C-rate greater than the reference C-rate, an overvoltage may be included in the measured voltage of the battery. Accordingly, the control unit (120) can generate an overvoltage profile (OP) by removing the reference differentiation profile based on the reference C-rate from the target differentiation 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. Fig. 5 illustrates an overvoltage profile (OP) corresponding to a first differential profile (DP1).

[0064] 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. When the differential 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] The overvoltage profile (OP) 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 capacity. When the differential profile acquired by the profile acquisition unit (110) is the second differential profile (DP2), the overvoltage profile (OP) can represent a correspondence between voltage and differential capacity.

[0066] 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).

[0067] Overvoltage profiles (OPs) can be configured to be pre-stored for each of multiple C-rates.

[0068] There may be multiple overvoltage profiles (OPs), and the C-rates corresponding to each of the multiple overvoltage profiles (OPs) may be different from each other. For example, based on a unit C-rate, an overvoltage profile (OP) corresponding to each C-rate may be stored in advance.

[0069] 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). For example, 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, when an overvoltage profile (OP) corresponding to a C-rate of 1C and an overvoltage profile (OP) corresponding to a C-rate of 1.2C are pre-stored, an overvoltage profile (OP) corresponding to a C-rate of 1.1C can be further obtained based on the difference between the two overvoltage profiles (OP).

[0070] The control unit (120) may be configured to generate a correction profile (CP) by calculating the difference between the differential profile and the overvoltage profile (OP).

[0071] For example, the control unit (120) can generate a correction profile (CP) by calculating the difference between the differential profile and the overvoltage profile (OP) in the same way that the overvoltage profile (OP) is generated based on the difference between the reference differential profile and the target differential profile.

[0072] For example, when the differential profile is the 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).

[0073] In another embodiment, when the differential profile is the second differential profile (DP2), the control unit (120) can generate a correction profile (CP) by calculating the voltage-dependent differential capacity difference between the second differential profile (DP2) and the overvoltage profile (OP).

[0074] FIG. 6 and FIG. 7 are schematic drawings illustrating a correction profile (CP) according to one embodiment of the present invention.

[0075] Fig. 6 is a diagram illustrating a correction profile (CP) corresponding to a 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). 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).

[0076] Fig. 7 is a diagram illustrating a correction profile (CP) corresponding to a second differential profile (DP2). In the embodiment of Fig. 7, the correction profile (CP) can be generated based on the voltage-dependent differential capacity difference between the second differential profile (DP2) and the corresponding overvoltage profile (not shown). The control unit (120) can generate a correction profile (CP) 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 (OP).

[0077] 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 differential profile, a correction profile (CP) with overvoltage removed can be quickly obtained. In addition, since the correction 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.

[0078] For example, when a low-rate charge / discharge cycle of 0.05C is required to acquire a battery profile (BP), it can take approximately 20 hours just to acquire the BP. Furthermore, converting the acquired BP into a differential profile and diagnosing the battery's condition based on the differential profile can also take additional time. When performing charge / discharge cycles at such a low C-rate (e.g., 0.05C), the process of acquiring a battery profile (BP) requires a significant amount of time, making it difficult to quickly diagnose the battery's condition.

[0079] When a battery is charged and discharged at a C-rate of 0.33C as in one embodiment of the present invention, a battery profile (BP) can be obtained in approximately 3 hours. According to one embodiment of the present invention, the time required to obtain a battery profile (BP) can be reduced compared to when charging and discharging at a low C-rate, such as 0.05C.

[0080] The battery profile (BP) obtained according to one embodiment of the present invention includes an overvoltage corresponding to noise. The battery information generation device (100) can quickly remove the noise included in the differential profile by calculating the difference between the differential profile and the overvoltage profile (OP). Therefore, even if the time required for generating the correction profile (CP) is further taken into account, the battery information generation device (100) according to one embodiment of the present invention has the advantage of being able to generate a profile capable of diagnosing the condition of the battery relatively very quickly compared to a method in which low-rate charging and discharging are forced.

[0081] The profile acquisition unit (110) and the 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 in software, 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.

[0082] 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 able to record, erase, update, and read data. As an example, the information storage means may include a RAM (Random Access Memory), a flash memory, a ROM (Read-Only Memory), an EEPROM (Electronically Erasable Programmable Read-Only Memory), a register, 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). Additionally, the storage unit (130) can store a battery profile (BP), differential profiles (DP1, DP2), overvoltage profile (OP), and correction profile (CP).

[0083] In one 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 a first overvoltage profile (OP) indicating a correspondence between a capacity and a differential voltage.

[0084] In another embodiment, the profile acquisition unit (110) may be configured to acquire a second differential profile (DP2) representing a correspondence between voltage and differential capacitance. The control unit (120) may be configured to correct the second differential profile (DP2) based on the second overvoltage profile (OP) representing a correspondence between voltage and differential capacitance.

[0085] Since the difference between the differential profile and the overvoltage profile (OP) must be calculated in order to generate the compensation profile (CP), the formats of the differential profile and the overvoltage profile (OP) can be identical.

[0086] If the differential profile represents a correspondence between capacitance and differential voltage, the overvoltage profile (OP) can also represent a correspondence between capacitance and differential voltage. If the differential profile represents a correspondence between voltage and differential capacity, the overvoltage profile (OP) can also represent a correspondence between voltage and differential capacity.

[0087] For example, referring to FIGS. 3, 5, and 6, the first differential profile (DP1) and the overvoltage profile (OP) represent a correspondence between capacity and differential voltage. Accordingly, the control unit (120) can generate a correction profile (CP) by calculating the differential voltage difference for each capacity between the first differential profile (DP1) and the overvoltage profile (OP).

[0088] The control unit (120) can be configured to provide information about the battery by outputting a correction profile (CP) to the outside.

[0089] 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 communicated 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.

[0090] Since the compensation profile (CP) is a profile indicating the current state of the battery, the state of the battery can be diagnosed based on the behavior of the peaks included in the compensation profile (CP). The peaks refer to the maximum or minimum points of the compensation profile (CP). If the state of the battery is diagnosed based on a differential profile that includes overvoltage, the state of the battery may not be accurately diagnosed due to the influence of the overvoltage. Since the battery information generation device (100) generates a compensation profile (CP) that removes the overvoltage included in the differential profile, the state of the battery can be relatively accurately diagnosed based on the compensation profile (CP). The battery information generation device (100) can quickly generate a compensation profile (CP) used to diagnose the state of the battery, thereby reducing the total time required for diagnosing the state of the battery.

[0091] The battery information generation device (100) according to the present invention can be applied to a BMS (Battery Management System). For example, 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), control unit (120), and storage unit (130) of the battery information generation device (100) can be implemented as components of the BMS.

[0092] Additionally, the battery information generation device (100) according to the present invention may be provided in a battery pack. 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.

[0093] FIG. 8 is a schematic drawing of a battery pack (10) according to another embodiment of the present invention.

[0094] 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).

[0095] The measuring unit (12) can be connected to a first sensing line (SL1), a second sensing line (SL2), and a third sensing line (SL3). 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).

[0096] 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.

[0097] 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 (BP) and a differential profile based on the battery information.

[0098] As another example, the profile acquisition unit (110) can receive a battery profile (BP) from the measurement unit (12). Then, the profile acquisition unit (110) can generate a differential profile based on the battery profile (BP).

[0099] As another example, the profile acquisition unit (110) can receive a differential profile from the measurement unit (12).

[0100] 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.

[0101] FIG. 9 is a schematic drawing of a vehicle according to another embodiment of the present invention.

[0102] 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). For example, 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).

[0103] FIG. 10 is a diagram schematically illustrating a battery information generation method according to another embodiment of the present invention.

[0104] 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).

[0105] Each step of the battery information generation method can be performed by the battery information generation device (100).

[0106] The profile acquisition step (S100) is a step of acquiring a differential profile indicating a correspondence between the capacity of the battery and the differential voltage, or the voltage of the battery and the differential capacity, and can be performed by the profile acquisition unit (110).

[0107] For example, the profile acquisition unit (110) can directly receive the differential profile of the battery from an external source. For example, the profile acquisition unit (110) can acquire the differential profile by receiving the differential profile through a wired and / or wireless connection to the external source.

[0108] As another example, the profile acquisition unit (110) can directly receive the battery profile (BP) of the battery from the outside. Furthermore, the profile acquisition unit (110) can generate a differential profile based on the received battery profile (BP). The profile acquisition unit (110) can be connected to the outside via wired and / or wireless means to receive the battery profile (BP) and directly generate a differential profile from the received battery profile (BP), thereby acquiring the differential profile.

[0109] As another example, 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 (BP) based on the received battery information, and may generate a differential profile based on the generated battery profile (BP). The profile acquisition unit (110) may acquire the differential profile by directly generating the differential profile based on the received battery information.

[0110] The target determination step (S200) is a step of determining a target C-rate corresponding to a differential profile, and can be performed by the control unit (120).

[0111] For example, the control unit (120) can receive information about the differential profile and C-rate from the profile acquisition unit (110). Then, the control unit (120) can determine the C-rate corresponding to the differential profile as the target C-rate.

[0112] The correction profile generation step (S300) is a step of generating a correction profile (CP) by correcting a differential profile based on an overvoltage profile (OP) corresponding to a target C-rate, and can be performed by the control unit (120).

[0113] In addition, the control unit (120) may be configured to select an overvoltage profile (OP) corresponding to the 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 differential profile and the overvoltage profile (OP).

[0114] For example, when the differential profile is the 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).

[0115] As another example, when the differential profile is a second differential profile (DP2), the control unit (120) can generate a correction profile (CP) by calculating the voltage-dependent differential capacity difference between the second differential profile (DP2) and the overvoltage profile (OP).

[0116] 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.

[0117] 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.

[0118] 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.

[0119] (Explanation of symbols)

[0120] 10: Battery pack

[0121] 11: Battery

[0122] 12: Measurement section

[0123] 100: Battery information generation device

[0124] 110: Profile acquisition section

[0125] 120: Control unit

[0126] 130: Storage

[0127] 900: Car

[0128] 910: Battery Pack

Claims

1. A profile acquisition unit configured to acquire a differential profile indicating a correspondence between the capacity of the battery and the differential voltage; and A battery information generation device including a control unit configured to determine a target C-rate (Current-rate) corresponding to the above differential profile and generate a correction profile by correcting the differential 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 correction profile by calculating the difference between the differential 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 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 preset based on a reference differential profile of a reference battery for a reference C-rate and a target differential profile of the reference battery for the target C-rate.

5. In paragraph 4, The above overvoltage profile is, A battery information generating device preset to indicate the difference between the above reference differential profile and the above target differential profile.

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

7. In paragraph 1, The above control unit, A battery information generation device 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. A profile acquisition step for acquiring a differential profile representing the correspondence between the capacity of the battery and the differential voltage; A target determination step for determining a target C-rate corresponding to the above differential profile; and A battery information generation method comprising a compensation profile generation step of generating a compensation profile by compensating the differential profile based on an overvoltage profile corresponding to the target C-rate.

11. A profile acquisition step for acquiring a differential profile indicating a correspondence between the capacity of the battery and the differential voltage; A target determination step for determining a target C-rate corresponding to the above differential profile; and A non-transitory readable storage medium storing a program for executing a battery information generation method, the method including a correction profile generation step of generating a correction profile by correcting the differential profile based on an overvoltage profile corresponding to the target C-rate.

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