Apparatus and method for managing battery

Abstract

An apparatus for managing a battery according to one embodiment of the present invention comprises: a section line acquisition unit configured to acquire a measured full cell section line showing a relationship between a voltage and a capacity of the battery; the section line determining unit is configured to adjust a preset reference positive section line and a preset reference negative section line to enable the electrode section lines to correspond to the measured full-monomer section line or a plurality of sections of the measured full-monomer section line, and generate an adjusted positive section line and an adjusted negative section line according to an adjusting result; and a control unit configured to determine a diagnostic factor of the battery from at least one of the adjusted positive electrode profile and the adjusted negative electrode profile.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application Nos. 10-2022-0185033 and 10-2022-0185081 filed in Korea on December 26, 2022, Korean Patent Application No. 10-2022-0187182 filed in Korea on December 28, 2022, and Korean Patent Application No. 10-2023-0121415 filed in Korea on September 12, 2023, the disclosures of which are incorporated herein by reference.

[0002] The present disclosure relates to an apparatus and method for managing a battery, and more particularly, to an apparatus and method for managing a battery which estimate a positive electrode profile and a negative electrode profile of a battery. Background Art

[0003] Recently, the demand for portable electronic products such as notebook computers, video cameras, and mobile phones has increased dramatically, and electric vehicles, energy storage batteries, robots, artificial satellites, etc. have been intensively developed. Therefore, high-performance batteries that allow repeated charging and discharging are being actively studied.

[0004] Batteries currently available on the market include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium batteries, etc. Among them, lithium batteries have attracted much attention because they have almost no memory effect compared to nickel-based batteries, and also have very low self-discharge rate and high energy density.

[0005] A lot of research is being done on these batteries in terms of high capacity and high density, but aspects of improving battery life and safety are also important. In order to improve the safety of the battery, the current state of the battery must be accurately diagnosed.

[0006] In order to most accurately diagnose the current state of the battery, the positive and negative cross-sectional lines of the battery must be fixed and analyzed separately. However, because the manufactured battery is almost impossible to disassemble and assemble, there is a problem that the positive and negative cross-sectional lines of the manufactured battery cannot be directly measured. Therefore, in order to more accurately diagnose the state of the battery, a technology for accurately estimating the positive and negative cross-sectional lines corresponding to the battery is required. Summary of the invention

[0007] Technical issues

[0008] The present disclosure is designed to solve the problems of the related art, and thus the present disclosure is directed to providing an apparatus and method for managing a battery, which can accurately estimate a positive electrode profile line and a negative electrode profile line corresponding to the battery.

[0009] These and other objects and advantages of the present disclosure can be understood from the following detailed description and will become more fully apparent from the exemplary embodiments of the present disclosure. In addition, it will be easily understood that the objects and advantages of the present disclosure can be achieved by the means shown in the attached claims and their combinations.

[0010] Technical Solutions

[0011] According to one aspect of the present invention, an apparatus for managing a battery may include: a profile acquisition unit configured to obtain a measured full-cell profile indicating a corresponding relationship between a voltage and a capacity of a battery; a profile determination unit configured to adjust a preset standard positive profile and a preset standard negative profile to correspond to a measured full-cell profile or multiple segments of a measured full-cell profile, and generate an adjusted positive profile and an adjusted negative profile based on the adjustment result; and a control unit configured to determine a diagnostic factor of the battery from at least one of the adjusted positive profile and the adjusted negative profile.

[0012] The profile obtaining unit may be configured to further obtain a full-cell differential profile corresponding to the measured full-cell profile and indicating a corresponding relationship between the capacity and the differential voltage.

[0013] The profile determination unit may be configured to divide the measured whole-cell profile into a plurality of sections based on at least one of a plurality of peaks included in the whole-cell differential profile.

[0014] The profile determination unit may be configured to divide the measured whole-cell profile into a plurality of sections based on the volumes of a plurality of peaks included in the whole-cell differential profile.

[0015] The profile determination unit may be configured to generate an adjusted positive profile and an adjusted negative profile corresponding to each of the plurality of sections by adjusting the standard positive profile and the standard negative profile to correspond to each of the plurality of sections.

[0016] The profile determination unit can be configured to generate multiple adjusted positive profiles so that the end point of the adjusted positive profile of the previous segment is the same as the starting point of the adjusted positive profile of the next segment, and to generate multiple adjusted negative profiles so that the end point of the adjusted negative profile of the previous segment is the same as the starting point of the adjusted negative profile of the next segment.

[0017] The profile determination unit may be configured to divide the measured whole-cell profile into a plurality of sections based on a plurality of reference peaks included in the whole-cell differential profile.

[0018] The profile determination unit may be configured to set a weight for each of the plurality of sections, and adjust the standard positive electrode profile and the standard negative electrode profile based on the weight to correspond to the measured full-cell profile.

[0019] The profile determination unit may be configured to set a weight of a target segment including at least one of a plurality of target peaks included in the all-monomer differential profile to be greater than weights of the remaining segments.

[0020] The profile determination unit can be configured to generate a comparative full-cell profile based on the adjusted positive profile and the adjusted negative profile, and adjust the standard positive profile and the standard negative profile so that as the section has a larger set weight, the error rate between the comparative full-cell profile and the measured full-cell profile decreases.

[0021] The section line obtaining unit may be configured to obtain at least one of a positive electrode differential section line corresponding to a standard positive electrode section line and a negative electrode differential section line corresponding to a standard negative electrode section line as the electrode differential section line.

[0022] The profile determination unit can be configured to divide the corresponding standard electrode profile among the standard positive profile and the standard negative profile into multiple electrode segments based on at least one of the multiple electrode peaks included in the electrode differential profile, and adjust the standard positive profile and the standard negative profile to correspond to the measured full-cell profile while adjusting each of the multiple electrode segments.

[0023] The profile determination unit may be configured to independently adjust each of the plurality of electrode segments.

[0024] When the positive differential profile is included in the electrode differential profile, the profile determination unit may be configured to divide the standard positive profile into a plurality of positive segments based on at least one of a plurality of positive peaks included in the positive differential profile.

[0025] When the negative differential profile line is included in the electrode differential profile line, the profile line determination unit may be configured to divide the standard negative profile line into a plurality of negative segments based on at least one of a plurality of negative peaks included in the negative differential profile line.

[0026] A battery pack according to another aspect of the present disclosure may include the apparatus for managing a battery according to the present disclosure.

[0027] A vehicle according to still another aspect of the present disclosure may include the apparatus for managing a battery according to the present disclosure.

[0028] According to another aspect of the present disclosure, a method for managing a battery may include: a profile acquisition step, which obtains a measured full-cell profile indicating a corresponding relationship between the voltage and capacity of the battery; a profile adjustment step, which adjusts a preset standard positive electrode profile and a preset standard negative electrode profile to correspond to the measured full-cell profile or multiple segments of the measured full-cell profile; a profile generation step, which generates an adjusted positive electrode profile and an adjusted negative electrode profile based on the adjustment result; and a factor determination step, which determines a diagnostic factor of the battery from at least one of the adjusted positive electrode profile and the adjusted negative electrode profile.

[0029] Effect of the Invention

[0030] According to one aspect of the present disclosure, an apparatus for managing a battery has an advantage of estimating a positive electrode profile and a negative electrode profile of a battery that cannot be directly measured by adjusting a standard positive electrode profile and a standard negative electrode profile.

[0031] In addition, since the apparatus for managing a battery can determine a diagnostic factor indicating the current state of the battery, the current state of the battery can be diagnosed based on the diagnostic factor. In other words, the apparatus for managing a battery has the advantage of determining a diagnostic factor that can diagnose the current state of the battery in a non-destructive manner.

[0032] The effects of the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the aforementioned disclosure, are used to provide a further understanding of the technical features of the present disclosure, and therefore, the present disclosure should not be construed as being limited to the accompanying drawings.

[0034] Figure 1 is a diagram schematically illustrating an apparatus for managing a battery according to an embodiment of the present disclosure.

[0035] Figure 2 is a diagram illustrating measuring a full-body cross-section line according to an embodiment of the present disclosure.

[0036] Figure 3 is a diagram showing a standard positive electrode cross section, a standard negative electrode cross section, and a standard full-cell cross section according to an embodiment of the present disclosure.

[0037] Figure 4 is a diagram illustrating a measured full-monobody section line and a standard full-monobody section line according to an embodiment of the present disclosure.

[0038] Figure 5 is a diagram showing a standard full monolithic cross-section and a comparative full monolithic cross-section according to an embodiment of the present disclosure.

[0039] Figure 6 is a diagram showing a full-monobody differential cross-section according to an embodiment of the present disclosure.

[0040] Figure 7 is a diagram showing a measurement of a full-body section line and multiple sections according to an embodiment of the present disclosure.

[0041] Figure 8 is a diagram illustrating a measured full-monobody cross-section line and a first comparative full-monobody cross-section line according to an embodiment of the present disclosure.

[0042] Fig. 9 is a diagram showing a full-monobody differential cross-section according to an embodiment of the present disclosure.

[0043] Fig.10 is a diagram showing a measurement of a full-body section line and multiple sections according to an embodiment of the present disclosure.

[0044] Fig.11 is a diagram showing a measured full-monobody cross-section line of an embodiment of the present disclosure and a second comparative full-monobody cross-section line.

[0045] Fig.12 2 is a diagram showing a positive electrode differential cross-section line of an embodiment of the present disclosure.

[0046] Fig.13 2 is a diagram showing a negative electrode differential cross-section line according to an embodiment of the present disclosure.

[0047] Fig.14 is a diagram showing a standard positive electrode cross-section and a standard negative electrode cross-section according to an embodiment of the present disclosure.

[0048] Fig.15 is a diagram illustrating a measured full-monobody cross-section line and a third comparative full-monobody cross-section line according to an embodiment of the present disclosure.

[0049] Fig.16 is a diagram showing an exemplary configuration of a battery pack according to another embodiment of the present disclosure.

[0050] Fig.17 is a diagram schematically showing a vehicle according to still another embodiment of the present disclosure.

[0051] Fig.18 is a diagram schematically illustrating a method for managing a battery according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] It should be understood that the terms used in this specification and the appended claims should not be interpreted as limited to general and dictionary meanings, but should be interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure based on the principle of allowing the inventor to appropriately define the terms to achieve the best interpretation.

[0053] Therefore, the descriptions presented herein are only preferred examples for illustrative purposes, and are not intended to limit the scope of the present disclosure, and it should be appreciated that other equivalents and modifications may be made thereto without departing from the scope of the present disclosure.

[0054] Furthermore, in describing the present disclosure, when it is considered that the detailed description of related known elements or functions makes the key subject matter of the present disclosure unclear, the detailed description is omitted herein.

[0055] Terms including ordinal numbers such as “first,” “second,” etc. may be used to distinguish one element from another among various elements, but are not intended to limit the elements by the terms.

[0056] Throughout the specification, when a part is referred to as “comprising” or “including” any element, unless explicitly stated otherwise, it means that the part can further include other elements while not excluding other elements.

[0057] Furthermore, throughout the specification, when a part is referred to as being “connected” to another part, it is not limited to the case where they are “directly connected” but also includes the case where they are “indirectly connected” with another element interposed therebetween.

[0058] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0059] Figure 1 is a diagram schematically illustrating an apparatus 100 for managing a battery according to an embodiment of the present disclosure.

[0060] refer to Figure 1 The apparatus 100 for managing a battery may include a profile obtaining unit 110 , a profile determining unit 120 , and a control unit 130 .

[0061] Here, a battery refers to an independent cell having a negative terminal and a positive terminal and being physically separable. For example, a lithium-ion battery or a lithium-polymer battery may be considered a battery. In addition, the type of the battery may be a cylindrical type, a prismatic type, or a pouch type. In addition, a battery may mean a battery bank, a battery module, or a battery pack in which a plurality of batteries are connected in series and / or in parallel. Below, for ease of explanation, a battery is interpreted as meaning an independent cell.

[0062] The profile obtaining unit 110 may be configured to obtain a measured full-cell profile M indicating a corresponding relationship between a voltage and a capacity of a battery.

[0063] Specifically, the measurement all-cell profile line M is a profile line that indicates the correspondence relationship between voltage (V) and capacity (Q) when the SOC of the battery is charged from 0% to 100%.

[0064] For example, in charging or discharging to generate a measured full-cell profile M, there is no particular limitation on the C rate. However, preferably, in order to obtain a more accurate measured full-cell profile M and a full-cell differential profile D, the battery should be charged or discharged at a low rate. For example, in the process of charging or discharging the battery at 0.05C, a measured full-cell profile M can be generated.

[0065] For example, the section line obtaining unit 110 may directly receive the measured full-cell section line M of the battery from the outside. That is, the section line obtaining unit 110 can obtain the measured full-cell section line M by connecting to the outside by wire and / or wirelessly and receiving the measured full-cell section line M.

[0066] As another example, the profile obtaining unit 110 may receive battery information about the voltage and capacity of the battery. In addition, the profile obtaining unit 110 can obtain the measured full-cell profile M by generating the measured full-cell profile M based on the received battery information.

[0067] Figure 2 is a diagram illustrating a measurement of a full-monomer section line M according to an embodiment of the present disclosure.

[0068] For example, in Figure 2 In the embodiment of the present invention, the measured full-cell profile M can be expressed as a two-dimensional XY graph with the X-axis set to capacity [Ah] and the Y-axis set to voltage [V].

[0069] The section line obtaining unit 110 may be connected to communicate with the control unit 130. For example, the section line obtaining unit 110 may be wired and / or wirelessly connected to the control unit 130. The section line obtaining unit 110 may transmit the obtained measured full-monomer section line M to the section line determining unit 120.

[0070] The profile determining unit 120 may be configured to adjust a preset standard positive profile Rp and a preset standard negative profile Rn to correspond to the measured full-cell profile M or a plurality of sections of the measured full-cell profile M.

[0071] Here, the standard positive electrode section line Rp may be a section line indicating the corresponding relationship between the capacity and voltage of a standard positive electrode cell preset to correspond to the positive electrode of the battery. For example, the standard positive electrode cell may be a positive electrode coin half cell or a positive electrode of a three-electrode cell. In addition, the standard negative electrode section line Rn may be a section line indicating the corresponding relationship between the capacity and voltage of a standard negative electrode cell preset to correspond to the negative electrode of the battery. For example, the standard negative electrode cell may be a negative electrode coin half cell or a negative electrode of a three-electrode cell.

[0072] Specifically, the section line determination unit 120 can determine whether the measurement of the full-body section line M is divided into multiple sections according to a predetermined capacity standard. For example, the section line determination unit 120 can determine whether the entire capacity section of the measurement of the full-body section line M is divided into multiple sections. As a specific example, the section line determination unit 120 can determine whether the entire capacity section of the measurement of the full-body section line M is divided into multiple sections based on the first capacity standard (see Figure 6 and Figure 7 ) or the second capacity standard (see Fig. 9 and Fig.10 ) to determine whether the measured full-body section line M is divided into multiple sections.

[0073] Figure 3 is a diagram showing a standard positive electrode cross section Rp, a standard negative electrode cross section Rn, and a standard full-cell cross section R according to an embodiment of the present disclosure.

[0074] exist Figure 3 In the embodiment of the present invention, in the standard positive electrode profile Rp, the positive electrode participation starting point is pi0, and the positive electrode participation end point is pf0. In the standard negative electrode profile Rn, the negative electrode participation starting point is ni0, and the negative electrode participation end point is nf0. The standard full-cell profile R is a standard for the same capacity and can be expressed as the difference between the positive electrode potential of the standard positive electrode profile Rp and the negative electrode potential of the standard negative electrode profile Rn.

[0075] Specifically, the adjustment targets of the standard positive electrode section line Rp and the standard negative electrode section line Rn may differ according to the entire section of the measured full cell section line M or each section of the measured full cell section line M, depending on whether the measured full cell section line M is divided.

[0076] For example, when the measured full-cell section line M is not divided into a plurality of sections, the section line determination unit 120 may adjust the standard positive section line Rp and the standard negative section line Rn to correspond to the entire section of the measured full-cell section line M. Here, an adjustment result of the standard positive section line Rp and the standard negative section line Rn can be derived.

[0077] Specifically, the profile determination unit 120 can generate a plurality of comparative full-cell profiles S by shifting or performing capacity scaling on the standard positive electrode profile Rp and the standard negative electrode profile Rn, and specify the comparative full-cell profile S having the minimum error with the measured full-cell profile M among the plurality of comparative full-cell profiles S. In addition, the adjusted positive electrode profile Rp' and the adjusted negative electrode profile Rn' corresponding to the specified comparative full-cell profile S can be determined.

[0078] As another example, when the measured full-cell section line M is divided into a plurality of sections, the section line determination unit 120 can adjust the standard positive section line Rp and the standard negative section line Rn to correspond to each section of the measured full-cell section line M. If the measured full-cell section line M is divided into n sections (where n is a natural number), the standard positive section line Rp and the standard negative section line Rn can be adjusted to correspond to each of the n sections. That is, an adjustment result of the standard positive section line Rp and the standard negative section line Rn can be derived (see Fig.11 ) or n adjusted results (see Figure 8 ).

[0079] Figure 4 is a diagram showing a measured full-monobody section line M and a standard full-monobody section line R according to an embodiment of the present disclosure.

[0080] exist Figure 4 In an embodiment, the standard full-cell cross-section R and the measured full-cell cross-section M may be different so that they do not correspond to each other. For example, the voltage section of the measured full-cell cross-section M and the standard full-cell cross-section R may be the same as 3.0 [V] to 4.0 [V], but the capacity section of the measured full-cell cross-section M may be 5 [Ah] to 45 [Ah], and the capacity section of the standard full-cell cross-section R may be 5 [Ah] to 50 [Ah]. Because the standard full-cell cross-section R is different from the measured full-cell cross-section M, the cross-section determination unit 120 is able to adjust the standard positive electrode cross-section Rp and the standard negative electrode cross-section Rn to correspond to the measured full-cell cross-section M.

[0081] The profile determining unit 120 may be configured to generate an adjusted positive electrode profile Rp′ and an adjusted negative electrode profile Rn′ according to the adjustment result.

[0082] Specifically, the adjusted positive electrode profile Rp' is the result of adjusting the standard positive electrode profile Rp, and the adjusted negative electrode profile Rn' is the result of adjusting the standard negative electrode profile Rn. In other words, the comparison of the full-cell profile S is specified based on the adjustment results of the standard positive electrode profile Rp and the standard negative electrode profile Rn, and the basis for comparing the full-cell profile S is the adjusted positive electrode profile Rp' and the adjusted negative electrode profile Rn'. Therefore, the adjusted positive electrode profile Rp' and the adjusted negative electrode profile Rn' can be strongly estimated as the positive electrode profile and the negative electrode profile of the battery.

[0083] Figure 5 is a diagram showing a standard full-monobody cross-section line R and a comparative full-monobody cross-section line S according to an embodiment of the present disclosure.

[0084] For example, in Figure 5In the embodiment, the standard positive electrode section line Rp can be adjusted to the adjusted positive electrode section line Rp', and the standard negative electrode section line Rn can be adjusted to the adjusted negative electrode section line Rn'. In other words, the standard full-monomer section line R can be adjusted to the comparative full-monomer section line S. Specifically, the positive electrode participation starting point pi0 of the standard positive electrode section line Rp can be adjusted to the positive electrode participation starting point pi of the adjusted positive electrode section line Rp', and the positive electrode participation end point pf0 of the standard positive electrode section line Rp can be adjusted to the positive electrode participation end point pf of the adjusted positive electrode section line Rp'. The negative electrode participation starting point ni0 of the standard negative electrode section line Rn can be adjusted to the negative electrode participation starting point ni of the adjusted negative electrode section line Rn', and the negative electrode participation end point nf0 of the standard negative electrode section line Rn can be adjusted to the negative electrode participation end point nf of the adjusted negative electrode section line Rn'.

[0085] The control unit 130 may be configured to determine a diagnostic factor of the battery from at least one of the adjusted positive electrode profile Rp′ and the adjusted negative electrode profile Rn′.

[0086] Specifically, the diagnostic factor may include at least one of a positive electrode factor and a negative electrode factor. That is, the control unit 130 may be configured to determine the positive electrode factor of the battery from the adjusted positive electrode profile Rp'. In addition, the control unit 130 may be configured to determine the negative electrode factor of the battery from the adjusted negative electrode profile Rn'.

[0087] For example, the positive electrode factor may include the positive electrode participation starting point pi, the positive electrode participation end point pf, and the positive electrode change rate ps.

[0088] The positive electrode participation starting point pi is the starting point of the adjusted positive electrode profile Rp'. Figure 5 In the embodiment, the positive electrode participation starting point pi is the point on the adjusted positive electrode profile Rp' corresponding to the capacity 5 [Ah].

[0089] The positive electrode participation end point pf is the end point of the adjusted positive electrode profile Rp'. Figure 5 In the embodiment of the present invention, the positive electrode participation end point pf is the point on the adjusted positive electrode profile Rp' corresponding to the capacity 45 [Ah].

[0090] The positive electrode change rate ps may mean the change rate [%] of the adjusted positive electrode section line Rp' relative to the standard positive electrode section line Rp. Specifically, the positive electrode change rate ps may be the shrinkage rate or expansion rate of the adjusted positive electrode section line Rp' relative to the standard positive electrode section line Rp. For example, if the contraction of the adjusted positive electrode section line Rp' and the standard positive electrode section line Rp is 10%, the positive electrode change rate ps is 90%. On the contrary, if the adjusted positive electrode section line Rp' extends 10% from the standard positive electrode section line Rp, the positive electrode change rate ps is 110%.

[0091] As another example, the negative electrode factor may include a negative electrode participation starting point ni, a negative electrode participation end point nf, and a negative electrode change rate ns.

[0092] The negative electrode participation starting point ni is the starting point of the adjusted negative electrode profile Rn'. Figure 5 In the embodiment of the present invention, the negative electrode starting point ni is a point on the adjusted negative electrode profile Rn' corresponding to the capacity 5 [Ah].

[0093] The negative electrode end point nf is the end point of the adjusted negative electrode profile Rn'. Figure 5 In the embodiment of the present invention, the negative electrode end point nf is a point on the adjusted negative electrode profile Rn' corresponding to a capacity of 45 [Ah].

[0094] The negative electrode change rate ns may mean the change rate [%] of the adjusted negative electrode profile Rn' relative to the standard negative electrode profile Rn. Specifically, the negative electrode change rate ns may be the shrinkage rate or expansion rate of the adjusted negative electrode profile Rn' relative to the standard negative electrode profile Rn. For example, if the adjusted negative electrode profile Rn' shrinks by 10% from the standard negative electrode profile Rn, the negative electrode change rate ns is 90%. On the contrary, if the adjusted negative electrode profile Rn' extends by 10% from the standard negative electrode profile Rn, the negative electrode change rate ns is 110%.

[0095] The apparatus 100 for managing a battery according to an embodiment of the present disclosure has the advantage of estimating the positive and negative electrode profiles of a battery that cannot be directly measured by adjusting the standard positive electrode profile Rp and the standard negative electrode profile Rn. In addition, because the apparatus 100 for managing a battery is capable of determining a diagnostic factor indicating the current state of the battery, the current state of the battery can be diagnosed based on the diagnostic factor. In other words, the apparatus 100 for managing a battery has the advantage of determining a diagnostic factor that can diagnose the current state of the battery in a non-destructive manner.

[0096] For example, it is assumed that the control unit 130 determines the positive electrode change rate ps as a diagnostic factor. The control unit 130 is capable of comparing the determined positive electrode change rate ps with a standard change rate preset for the battery. In addition, the control unit 130 is capable of diagnosing the state of the battery based on the ratio difference between the positive electrode change rate ps and the standard change rate. If the calculated ratio difference is greater than or equal to a threshold value, the control unit 130 can diagnose the state of the battery as an abnormal or degraded state. On the contrary, if the ratio difference is less than the threshold value, the control unit 130 can diagnose the state of the battery as a normal state.

[0097] As another example, it is assumed that the control unit 130 determines the positive electrode change rate ps of the plurality of batteries as a diagnostic factor. The control unit 130 is able to diagnose the relative degree of degradation of the plurality of batteries by comparing the magnitudes of the plurality of positive electrode change rates ps that have been determined. For example, the control unit 130 is able to diagnose that the greater the determined positive electrode change rate ps, the more the battery is relatively degraded.

[0098] In the above, an embodiment has been described in which the control unit 130 diagnoses the battery state using the positive electrode change rate ps, but it should be noted that the battery state can be diagnosed based on at least one of the diagnosis factors.

[0099] In addition, the control unit 130 may diagnose the state of the battery by combining the diagnosis results of a plurality of diagnosis factors. For example, the control unit 130 may diagnose the state of the battery based on the majority of the diagnosis results among the plurality of diagnosis factors.

[0100] Meanwhile, the control unit 130 included in the device 100 for managing a battery may optionally include a processor, an application specific integrated circuit (ASIC), other chipsets, logic circuits, registers, communication modems, data processing devices, etc., known in the art, to execute various control logics executed in the present disclosure. In addition, when the control logic is implemented as software, the control unit 130 may be implemented as a set of program modules. At this time, the program module may be stored in a memory and executed by the control unit 130. The memory may be inside or outside the control unit 130, and may be connected to the control unit 130 through various well-known means.

[0101] In addition, the apparatus 100 for managing a battery may further include a storage unit 140. The storage unit 140 may store data required for the operation and function of each component of the apparatus 100 for managing a battery, data generated in the process of performing an operation or function, and the like. The type of the storage unit 140 is not particularly limited as long as it is a known information storage device capable of recording, erasing, updating, and reading data. As an example, the information storage device may include a RAM, a flash memory, a ROM, an EEPROM, a register, and the like. In addition, the storage unit 140 may store a program code in which a process executable by the control unit 130 is defined.

[0102] For example, the storage unit 140 may store a standard positive cross-section Rp, a standard negative cross-section Rn, a standard full-cell cross-section R, a measured full-cell cross-section M, an adjusted positive cross-section Rp', an adjusted negative cross-section Rn', a comparative full-cell cross-section S, a positive factor, a negative factor, and the like.

[0103] In the following, reference Figures 6 to 8, a first embodiment in which the profile determination unit 120 adjusts the standard positive electrode profile Rp and the standard negative electrode profile Rn will be described in detail.

[0104] Specifically, Figure 6 is a diagram showing a full-monobody differential cross-section line D according to an embodiment of the present disclosure. Figure 7 is a diagram showing a measurement of a full-body section line M and a plurality of sections according to an embodiment of the present disclosure. Figure 8 is a diagram illustrating a measured full-monobody section line M and a first comparative full-monobody section line S1 according to an embodiment of the present disclosure.

[0105] The profile obtaining unit 110 may be configured to further obtain a full-cell differential profile D corresponding to the measured full-cell profile M and indicating a corresponding relationship between the capacity and the differential voltage.

[0106] Specifically, the full-cell differential profile D is a profile obtained by differentiating the measured full-cell profile M with respect to the capacity. In other words, the full-cell differential profile D is a profile that represents the corresponding relationship between the capacity and the differential voltage. Here, the differential voltage is a value obtained by differentiating the voltage (V) with respect to the capacity (Q), and can be expressed as "dV / dQ".

[0107] For example, in Figure 6 In the embodiment of FIG. 1 , the full-cell differential profile D can be expressed as a two-dimensional XY graph with the X-axis set to capacity [Ah] and the Y-axis set to differential voltage [dV / dQ].

[0108] For example, the section line obtaining unit 110 may directly receive the full-cell differential section line D of the battery from the outside. That is, the section line obtaining unit 110 can obtain the full-cell differential section line D by connecting to the outside in a wired and / or wireless manner and receiving the full-cell differential section line D.

[0109] As another example, the section line obtaining unit 110 may generate the full-monomer differential section line D based on the received measured full-monomer section line M or the directly generated measured full-monomer section line M. That is, the section line obtaining unit 110 can obtain the full-monomer differential section line D by directly generating the full-monomer differential section line D by differentiating the measured full-monomer section line M with respect to the capacity.

[0110] The section line obtaining unit 110 may send the obtained all-monomer differential section line D to the section line determining unit 120 .

[0111] The profile determination unit 120 may be configured to divide the measured whole-monomer profile M into a plurality of sections based on at least one of a plurality of peaks included in the whole-monomer differential profile D. As shown in FIG.

[0112] Specifically, the peak refers to a point corresponding to the inflection point of the measured full-cell profile M. In other words, the peak refers to a point in the full-cell differential profile D where the instantaneous rate of change of the differential voltage with respect to the capacity is 0. For example, the maximum point and the minimum point of the full-cell differential profile D can be determined as the peak.

[0113] For example, in Figure 6 In the embodiment of the invention, the profile determination unit 120 may determine the first to seventh peaks p1 to p7 in the full-monomer differential profile D. Here, the first peak p1, the third peak p3, the fifth peak p5, and the seventh peak p7 are peaks corresponding to the minimum point of the full-monomer differential profile D, and the second peak p2, the fourth peak p4, and the sixth peak p6 are peaks corresponding to the maximum value of the full-monomer differential profile D.

[0114] Specifically, the profile determination unit 120 may be configured to divide the measured full-monomer profile M into a plurality of sections based on the capacities of a plurality of peaks included in the full-monomer differential profile D. As shown in FIG.

[0115] For example, in Figure 7 In the embodiment of the present invention, the profile determination unit 120 can divide the measured full-monomer profile M into the first to eighth sections R1 to R8 according to the multiple capacities Q1 to Q7 corresponding to the first to seventh peaks p1 to p7. Here, the first section R1 is a capacity section from 0 [Ah] to Q1, the second section R2 is a capacity section from Q1 to Q2, and the third section R3 is a capacity section from Q2 to Q3. The fourth section R4 is a capacity section from Q3 to Q4, the fifth section R5 is a capacity section from Q4 to Q5, and the sixth section R6 is a capacity section from Q5 to Q6. The seventh section R7 is a capacity section from Q6 to Q7, and the eighth section R8 is a capacity section from Q7 to 45 [Ah].

[0116] In addition, the section line determination unit 120 may be configured to adjust the standard positive section line Rp and the standard negative section line Rn to correspond to each of the plurality of sections. That is, the section line determination unit 120 may be configured to generate an adjusted positive section line and an adjusted negative section line corresponding to each of the plurality of sections.

[0117] Specifically, the standard positive electrode section line Rp and the standard negative electrode section line Rn can be adjusted to correspond to each section where the whole cell section line M is measured.

[0118] For example, in Figure 7In an embodiment of the present invention, the profile determination unit 120 may adjust the standard positive profile Rp and the standard negative profile Rn relative to the first section R1 of the measured full-cell profile M. Specifically, among the multiple comparative full-cell profiles generated by the profile determination unit 120, the comparative full-cell profile that is most similar to the measured full-cell profile M in the first section R1 (e.g., having a smaller error) may be specified. In addition, the profile determination unit 120 may determine a first adjusted positive profile Rp1′ and a first adjusted negative profile Rn1′ corresponding to the specified comparative full-cell profile.

[0119] In the same manner, the section line determination unit 120 may determine second to eighth adjusted positive section lines Rp2' to Rp8' and second to eighth adjusted negative section lines Rp2' to Rp8' for each of the second to eighth sections R2 to R8 where the full-cell section line M is measured.

[0120] For example, in Figure 8 In the embodiment, the first adjusted positive section line Rp1' and the first adjusted negative section line Rn1' corresponding to the first section R1 can be determined, and the second adjusted positive section line Rp2' and the second adjusted negative section line Rn2' corresponding to the second section R2 can be determined. The third adjusted positive section line Rp3' and the third adjusted negative section line Rn3' corresponding to the third section R3 can be determined, and the fourth adjusted positive section line Rp4' and the fourth adjusted negative section line Rn4' corresponding to the fourth section R4 can be determined. The fifth adjusted positive section line Rp5' and the fifth adjusted negative section line Rn5' corresponding to the fifth section R5 can be determined, and the sixth adjusted positive section line Rp6' and the sixth adjusted negative section line Rn6' corresponding to the sixth section R6 can be determined. A seventh adjusted positive section line Rp7' and a seventh adjusted negative section line Rn7' corresponding to the seventh section R7 may be determined, and an eighth adjusted positive section line Rp8' and an eighth adjusted negative section line Rn8' corresponding to the eighth section R8 may be determined.

[0121] The control unit 130 can determine the positive electrode factor from each of the plurality of adjusted positive electrode profiles Rp1' to Rp8', and determine the negative electrode factor from each of the plurality of adjusted negative electrode profiles Rn1' to Rn8'. In addition, the control unit 130 can diagnose the state of the positive electrode of the battery in the corresponding section based on each of the plurality of determined positive electrode factors. In addition, the control unit 130 can diagnose the state of the negative electrode of the battery in the corresponding section based on each of the plurality of determined negative electrode factors.

[0122] exist Figure 8In the embodiment of the present invention, the control unit 130 can determine the positive electrode participation starting points pi1 to pi8, the positive electrode participation end points pf1 to pf8, and the positive electrode change rates ps1 to ps8 of the first to eighth adjusted positive electrode profiles Rp1' to Rp8'. Similarly, the control unit 130 can determine the negative electrode participation starting points ni1 to ni8, the negative electrode participation end points nf1 to nf8, and the negative electrode change rates ns1 to ns8 of the first to eighth adjusted negative electrode profiles Rn1' to Rn8'.

[0123] For example, the control unit 130 may determine the degree of positive electrode degradation for each of the first to eighth sections R1 to R8 by considering a plurality of positive electrode change rates ps1 to ps8. Specifically, the control unit 130 may determine the positive electrode change rate of each of the first to eighth sections R1 to R8 as the degree of positive electrode degradation in the corresponding section. Therefore, the control unit 130 is able to determine the section in which the positive electrode is most degraded among the first to eighth sections R1 to R8.

[0124] As another example, the control unit 130 may determine the degree of negative electrode degradation of each of the first to eighth sections R1 to R8 by considering a plurality of negative electrode change rates ns1 to ns8. Specifically, the control unit 130 may determine the degree of negative electrode degradation in the corresponding section based on the negative electrode change rate for each of the first to eighth sections R1 to R8. Therefore, the control unit 130 is able to determine the section in which the negative electrode is most degraded among the first to eighth sections R1 to R8.

[0125] exist Figure 8 In the embodiment of the present invention, the profile determination unit 120 can determine the first comparison full-cell profile S1 corresponding to the measured full-cell profile based on the first to eighth adjusted positive electrode profiles Rp1' to Rp8' and the first to eighth adjusted negative electrode profiles Rn1' to Rn8'. The control unit 130 can determine the positive electrode participation starting point of the battery as pi1, and the positive electrode participation end point as pf8. In addition, the control unit 130 can determine the negative electrode participation starting point of the battery as ni1, and the negative electrode participation end point as nf8.

[0126] Preferably, the profile determination unit 120 can be configured to generate a plurality of adjusted positive profiles Rp1' to Rp8', so that the end point of the adjusted positive profile Rp' for the previous section is the same as the start point of the adjusted positive profile Rp' for the next section. Similarly, the profile determination unit 120 can be configured to generate a plurality of adjusted negative profiles Rn1' to Rn8', so that the end point of the adjusted negative profile Rn' for the previous section is the same as the start point of the adjusted negative profile Rn' for the next section.

[0127] Specifically, because the multiple adjusted positive electrode profiles Rp1' to Rp8' are determined as a whole as the adjusted positive electrode profile Rp' of the battery, the multiple adjusted positive electrode profiles Rp1' to Rp8' must be continuous. Similarly, the multiple adjusted negative electrode profiles Rn1' to Rn8' must be continuous because they are determined as a whole as the adjusted negative electrode profile Rn' of the battery.

[0128] For example, in Figure 8 In the embodiment of the present invention, the profile determination unit 120 may determine the positive electrode participation end point pf2 of the second adjusted positive electrode profile Rp2' after setting the positive electrode participation starting point pi2 of the second adjusted positive electrode profile Rp2' equal to the positive electrode participation end point pf1 of the first adjusted positive electrode profile Rp1'. Similarly, the profile determination unit 120 may set each of the positive electrode participation starting points pi3 to pi8 of the third to eighth adjusted positive electrode profiles Rp3' to Rp8' to correspond to each of the positive electrode participation end points pf2 to pf7 of the second to seventh adjusted positive electrode profiles Rp2' to Rp7'.

[0129] In addition, Figure 8 In the embodiment of the present invention, the profile determination unit 120 may determine the negative electrode participation end point nf2 of the second adjusted negative electrode profile Rn2' after setting the negative electrode participation starting point ni2 of the second adjusted negative electrode profile Rn2' to be the same as the negative electrode participation end point nf1 of the first adjusted negative electrode profile Rn1'. Similarly, the profile determination unit 120 may determine each of the negative electrode participation starting points ni3 to ni8 of the third to eighth adjusted negative electrode profiles Rn3' to Rn8' to correspond to each of the negative electrode participation end points nf2 to nf7 of the second to seventh adjusted negative electrode profiles Rn2' to Rn7'.

[0130] In addition, Figure 8 In the embodiment of the invention, the control unit 130 may determine the positive electrode participation starting point of the adjusted positive electrode profile Rp' for the battery as pi1, and the positive electrode participation end point as pf8. In addition, the control unit 130 may determine the negative electrode participation starting point of the adjusted negative electrode profile Rn' for the battery as ni1, and the negative electrode participation end point as nf8.

[0131] The apparatus 100 for managing a battery according to an embodiment of the present disclosure can determine the positive electrode degradation degree and the negative electrode degradation degree of the battery for each of the multiple sections by determining the adjusted positive electrode profile and the adjusted negative electrode profile for each of the multiple sections. In other words, the apparatus 100 for managing a battery is able to estimate the positive electrode degradation degree and the negative electrode degradation degree for each detailed section, so it has the advantage of deriving a diagnostic factor that can more accurately diagnose the state of the battery. In addition, the apparatus 100 for managing a battery has the advantage of more accurately and precisely diagnosing the state of the positive and negative electrodes of the battery through the derived diagnostic factors.

[0132] In the following, reference Figures 9 to 11 , a second embodiment in which the profile determining unit 120 adjusts the standard positive electrode profile Rp and the standard negative electrode profile Rn will be described in detail.

[0133] Fig. 9 is a diagram showing a full-monobody differential cross-section line D according to an embodiment of the present disclosure. Fig.10 is a diagram illustrating a measurement full-monobody section line M and a plurality of sections R1 to R5 according to an embodiment of the present disclosure. Fig.11 is a diagram illustrating a measured full-monomer section line M and a second comparative full-monomer section line S2 according to an embodiment of the present disclosure.

[0134] The profile determination unit 120 may be configured to divide the measured whole-monomer profile M into a plurality of sections R1 to R5 based on a plurality of reference peaks included in the whole-monomer differential profile D. As shown in FIG.

[0135] Specifically, the reference peak is the peak corresponding to the minimum point of the full monomer differential profile line D. For example, Fig. 9 In the embodiment of the present invention, the plurality of reference peaks may include a first peak p1, a third peak p3, a fifth peak p5, and a seventh peak p7.

[0136] exist Fig. 9 In the embodiment of the present invention, the profile determination unit 120 can divide the measured full-monomer profile M into the first to fifth sections R1 to R5 according to the multiple capacities Q1, Q3, Q5, Q7 corresponding to the reference peaks p1, p3, p5, p7. Here, the first section R1 is a capacity section from 0 [Ah] to Q1, the second section R2 is a capacity section from Q1 to Q3, and the third section R3 is a capacity section from Q3 to Q5. The fourth section R4 is a capacity section from Q5 to Q7, and the fifth section R5 is a capacity section from Q7 to 45 [Ah].

[0137] The section line determining unit 120 may be configured to set a weight for each of the plurality of sections R1 to R5 .

[0138] Here, the weight set for each of the plurality of sections R1 to R5 is a value between 0 and 1, and the sum of the set weights is 1.

[0139] For example, the control unit 130 can set the weights of the first to fifth sections R1 to R5 to 0.2, respectively.

[0140] As another example, the control unit 130 may set the weights of the first to fifth sections R1 to R5 according to the importance of the first to fifth sections R1 to R5. Specifically, some of the multiple sections R1 to R5 are sections that reflect the state of the positive electrode of the battery, while others are sections that reflect the state of the negative electrode of the battery. Therefore, the control unit 130 may set the importance of the section corresponding to the item to be diagnosed among the multiple sections R1 to R5 to be high. In addition, the weight of the section with high importance may be set to be greater than the weight of other sections.

[0141] Specifically, the profile determination unit 120 may be configured to set the weight of the target segment including at least one of the plurality of target peaks included in the full-monomer differential profile D to be greater than the weights of the remaining segments.

[0142] Specifically, the target peak is the peak corresponding to the maximum point of the full-monomer differential profile line D. For example, Fig. 9 In the embodiment, the plurality of target peaks may include a second peak p2, a fourth peak p4, and a sixth peak p6.

[0143] The control unit 130 may select at least one of the multiple target peaks according to the diagnostic object, and determine the segment including the selected target peak as the target segment. For example, if the diagnostic item is in a negative state, the control unit 130 may determine the second segment R2 including the second peak p2 as the target segment, and set the weight of the second segment R2 to the maximum. As another example, when the diagnostic item is in a positive state, the control unit 130 may determine the fourth segment R4 including the sixth peak p6 as the target segment, and set the weight of the fourth segment R4 to the maximum.

[0144] The profile determination unit 120 may be configured to adjust the standard positive electrode profile Rp and the standard negative electrode profile Rn to correspond to the measured full-cell profile M based on the weights.

[0145] Specifically, the section line determination unit 120 may be configured to generate a second comparative full-cell section line S2 based on the adjusted positive section line Rp′ and the adjusted negative section line Rn′.

[0146] For example, the profile determination unit 120 may generate a plurality of comparative full-cell profiles by shifting the standard positive profile Rp and the standard negative profile Rn or scaling their capacities. Fig.11In the embodiment of the present invention, the profile determination unit 120 can determine the second comparison full-cell profile S2 corresponding to the measured full-cell profile M based on the adjusted positive electrode profile Rp' and the adjusted negative electrode profile Rn'. The control unit 130 can determine the positive electrode participation starting point of the battery as pi, and the positive electrode participation end point as pf. In addition, the control unit 130 can determine the negative electrode participation starting point of the battery as ni, and the negative electrode participation end point as nf.

[0147] Furthermore, the profile determination unit 120 may be configured to adjust the standard positive profile Rp and the standard negative profile Rn so that the error rate between the comparison full cell profile S and the measurement full cell profile M decreases as the segment has a greater set weight.

[0148] For example, the profile determination unit 120 can specify a comparative full-monomer profile with a low error rate among multiple comparative full-monomer profiles in the order of the largest weight among multiple sections R1 to R5 of the measured full-monomer profile M. Assuming that one hundred comparative full-monomer profiles are generated and the target section is the second section R2, the profile determination unit 120 can specify a second comparative full-monomer profile S2 with the lowest error rate in the second section R2 among the one hundred comparative full-monomer profiles. In addition, the profile determination unit 120 can determine the adjusted positive electrode profile Rp' and the adjusted negative electrode profile Rn' corresponding to the specified second comparative full-monomer profile S2. If there are multiple comparative full-monomer profiles with the lowest error rate in the second section R2, the profile determination unit 120 can specify a second comparative full-monomer profile S2 with a lower overall error rate for the entire capacity section of the measured full-monomer profile M.

[0149] The apparatus 100 for managing a battery according to an embodiment of the present disclosure has the advantage of determining a diagnostic factor that better reflects the state of the battery because it adjusts the standard positive electrode profile Rp and the standard negative electrode profile Rn to correspond to the diagnostic item. In other words, because the optimal diagnostic factor corresponding to the diagnostic item can be determined, the state of the battery can be diagnosed more accurately.

[0150] In the following, reference Figures 12 to 15 , a third embodiment in which the profile determination unit 120 adjusts the standard positive electrode profile Rp and the standard negative electrode profile Rn will be described in detail.

[0151] Fig.12 is a diagram showing a positive electrode differential cross-sectional line DRp according to an embodiment of the present disclosure. Fig.13 is a diagram showing a negative electrode differential cross-sectional line DRn according to an embodiment of the present disclosure. Fig.14 is a diagram showing a standard positive electrode cross-sectional line Rp and a standard negative electrode cross-sectional line Rn according to an embodiment of the present disclosure. Fig.15is a diagram illustrating a measured full-monobody section line M and a third comparative full-monobody section line S3 according to an embodiment of the present disclosure.

[0152] The section line obtaining unit 110 may be configured to obtain at least one of a positive electrode differential section line DRp corresponding to a standard positive electrode section line Rp and a negative electrode differential section line DRn corresponding to a standard negative electrode section line Rn as an electrode differential section line.

[0153] Specifically, the positive electrode differential cross section DRp is a cross section obtained by differentiating the standard positive electrode cross section Rp with respect to the capacity, and the negative electrode differential cross section DRn is a cross section obtained by differentiating the standard negative electrode cross section Rn with respect to the capacity.

[0154] For example, in Fig.12 In the embodiment of , the positive electrode differential profile DRp can be expressed as a two-dimensional XY graph with the X-axis set to capacity [Ah] and the Y-axis set to differential voltage [dV / dQ]. Fig.13 In the embodiment of FIG. 5 , the negative electrode differential profile line DRn can be expressed as a two-dimensional XY graph with the X-axis set to capacity [Ah] and the Y-axis set to differential voltage [dV / dQ].

[0155] For example, the profile obtaining unit 110 can directly receive the positive differential profile DRp and the negative differential profile DRn of the battery from the outside. That is, the profile obtaining unit 110 is capable of receiving information from the outside via wired and / or wireless. As another example, the profile obtaining unit 110 can generate the positive differential profile DRp and the negative differential profile DRn based on the standard positive profile Rp and the standard negative profile Rn.

[0156] The profile determination unit 120 may be configured to divide a corresponding standard electrode profile among the standard positive profile Rp and the standard negative profile Rn into a plurality of electrode segments based on at least one of a plurality of electrode peaks included in the electrode differential profile.

[0157] Specifically, the positive differential profile line DRp may include a plurality of positive peaks, and the negative differential profile line DRn may include a plurality of negative peaks.

[0158] exist Fig.12 In the embodiment of the present invention, the positive differential profile line DRp may include first to fourth positive peaks pp1, pp2, pp3 and pp4. Specifically, the positive peak may include a peak corresponding to the maximum point of the positive differential profile line DRp. The positive peak may include a peak corresponding to the minimum point having the maximum capacity among the multiple maximum points of the positive differential profile line DRp. The capacity of the first positive peak pp1 is Qp1, the capacity of the second positive peak pp2 is Qp2, the capacity of the third positive peak pp3 is Qp3, and the capacity of the fourth positive peak pp4 is Qp4.

[0159] exist Fig.13 In the embodiment of the present invention, the negative electrode differential profile line DRn may include first to third negative electrode peaks np1, np2, and np3. Specifically, the negative electrode peak may include a peak corresponding to a maximum point of the negative electrode differential profile line DRn. The capacity of the first negative electrode peak np1 is Qn1, the capacity of the second negative electrode peak np2 is Qn2, and the capacity of the third negative electrode peak np3 is Qn3.

[0160] exist Fig.14 In the embodiment of the present invention, the section line determination unit 120 can divide the standard positive section line Rp into the first to fifth positive sections PR1 to PR5. The first positive section PR1 is a capacity section of 5 [Ah] to Qp1, and the second positive section PR2 is a capacity section of Qp1 to Qp2. The third positive section PR3 is a capacity section of Qp2 to Qp3, the fourth positive section PR4 is a capacity section of Qp3 to Qp4, and the fifth positive section PR5 is a capacity section of Qp4 to 50 [Ah].

[0161] In addition, the profile determination unit 120 can divide the standard negative electrode profile Rn into first to fourth negative electrode sections NR1 to NR4. The first negative electrode section NR1 is a capacity section of 5 [Ah] to Qn1, and the second negative electrode section NR2 is a capacity section of Qn1 to Qn2. The third negative electrode section NR3 is a capacity section of Qn2 to Qn3, and the fourth negative electrode section NR4 is a capacity section of Qn3 to 50 [Ah].

[0162] The profile determination unit 120 may be configured to adjust the standard positive profile Rp and the standard negative profile Rn to correspond to the measured full-cell profile M while adjusting each of the plurality of electrode sections.

[0163] Specifically, the profile determination unit 120 may be configured to independently adjust each of the plurality of electrode segments. That is, the profile determination unit 120 may determine the adjusted positive profile Rp' and the adjusted negative profile Rn' corresponding to the measured full-cell profile M by independently adjusting the change rate of each of the plurality of electrode segments.

[0164] The adjusted positive section line Rp' can be divided into a plurality of adjusted positive sections PR1' to PR5', and the adjusted negative section line Rn' can be divided into a plurality of adjusted negative sections NR1' to NR4'. Each of the plurality of adjusted positive sections PR1' to PR5' is obtained by changing each of the plurality of positive sections PR1 to PR5 of the standard positive section line Rp, and each of the plurality of adjusted negative sections NR1' to NR4' is obtained by changing each of the plurality of negative sections NR1 to NR4 of the standard negative section line Rn.

[0165] For example, in Fig.15 In the embodiment of the invention, the adjusted positive section line Rp' can be divided into first to fifth adjusted positive sections PR1' to PR5', and each of the first to fifth adjusted positive sections PR1' to PR5' corresponds to each of the first to fifth positive sections PR1 to PR5 of the positive section line Rp. The first adjusted positive section PR1' is a section obtained by changing the first positive section PR1, and the second adjusted positive section PR2' is a section obtained by changing the second positive section PR2. The third adjusted positive section PR3' is a section obtained by changing the third positive section PR3, the fourth adjusted positive section PR4' is a section obtained by changing the fourth positive section PR4, and the fifth adjusted positive section PR5' is a section obtained by changing the fifth positive section PR5. The control unit 130 can determine the positive participation starting point pi and the positive participation end point pf of the adjusted positive section line Rp'. In addition, the control unit 130 may determine the positive pole change rate ps1 to ps5 for each of the first to fifth adjusted positive pole sections RP1' to PR5'. For example, the control unit 130 may determine the ratio of the first adjusted positive pole section PR1' to the first positive pole section PR1 as the positive pole change rate ps1 for the first adjusted positive pole section PR1'. That is, the control unit 130 may determine the positive pole change rates ps1 to ps5 for the plurality of adjusted positive pole sections RP1' to PR5' by calculating the change rates of the adjusted positive pole sections RP1' to PR5' relative to the positive pole sections PR1 to PR5. Similarly, the control unit 130 may determine the positive pole change rates ps2 to ps5 for the second to fifth adjusted positive pole sections PR2' to PR5'.

[0166] Similarly, in Fig.15In the embodiment of the invention, the adjusted negative section line Rn' can be divided into first to fourth adjusted negative sections NR1' to NR4', and each of the first to fourth adjusted negative sections NR1' to NR4' corresponds to each of the first to fourth negative sections NR1 to NR4 of the standard negative section line Rn. The first adjusted negative section NR1' is a section obtained by changing the first negative section NR1, and the second adjusted negative section NR2' is a section obtained by changing the second negative section NR2. The third adjusted negative section NR3' is a section obtained by changing the third negative section NR3, and the fourth adjusted negative section NR4' is a section obtained by changing the fourth negative section NR4. The control unit 130 can determine the negative pole participation starting point ni and the negative pole participation end point nf of the adjusted negative section line Rn'. In addition, the control unit 130 can determine the negative pole change rate ns1 to ns4 for each of the first to fourth adjusted negative sections NR1' to NR4'. For example, the control unit 130 may determine the ratio of the first adjusted negative electrode section NR1' to the first negative electrode section NR1 as the negative electrode change rate ns1 for the first adjusted negative electrode section NR1'. That is, the control unit 130 may determine the negative electrode change rate for the plurality of adjusted negative electrode sections NR1' to NR4' by calculating the change rate of the adjusted negative electrode sections NR1' to NR4' relative to the negative electrode sections NR1 to NR4. Similarly, the control unit 130 may determine the negative electrode change rates ns2 to ns4 for the second to fourth adjusted negative electrode sections NR2' to NR4'.

[0167] The section line determination unit 120 may determine a third comparative full-cell section line S3 corresponding to the measured full-cell section line M based on the adjusted positive section line Rp′ and the adjusted negative section line Rn′. Fig.15 In the embodiment of the present invention, the control unit 130 may determine the positive electrode of the battery to participate in the starting point as pi, and the positive electrode to participate in the end point as pf. In addition, the control unit 130 may determine the negative electrode of the battery to participate in the starting point as ni, and the negative electrode to participate in the end point as nf.

[0168] In other words, when the positive differential profile DRp is included in the electrode differential profile, the profile determination unit 120 may be configured to divide the standard positive profile Rp into a plurality of positive segments based on at least one of the plurality of positive peaks included in the positive differential profile DRp. In addition, when the negative differential profile DRn is included in the electrode differential profile, the profile determination unit 120 may be configured to divide the standard negative profile Rn into a plurality of negative segments based on at least one of the plurality of negative peaks included in the negative differential profile DRn. Figure 12 to Figure 14, an embodiment has been described in which both the positive differential section line DRp and the negative differential section line DRn are included in the electrode differential section line so that the standard positive section line Rp is divided into a plurality of positive sections and the standard negative section line Rn is divided into a plurality of negative sections. However, depending on the embodiment, the positive differential section line DRp or the negative differential section line DRn may be included in the electrode differential section line.

[0169] The apparatus 100 for managing a battery according to an embodiment of the present disclosure can determine an adjusted positive electrode profile and an adjusted negative electrode profile by adjusting a plurality of positive electrode segments and / or a plurality of negative electrode segments, respectively. In other words, the apparatus 100 for managing a battery has the advantage of determining a detailed diagnostic factor of the battery. Therefore, based on the diagnostic factor, the state of the battery can be diagnosed in more detail and more accurately.

[0170] The device 100 for managing a battery according to the present disclosure can be applied to a BMS. In other words, the BMS according to the present disclosure may include the above-mentioned device 100 for managing a battery. In this configuration, at least some components of the device 100 for managing a battery may be implemented by supplementing or adding the functions of components included in a conventional BMS. For example, the section line obtaining unit 110, the section line determining unit 120, the control unit 130, and the storage unit 140 of the device 100 for managing a battery may be implemented as components of a BMS.

[0171] In addition, the apparatus 100 for managing a battery according to the present disclosure may be provided in a battery pack. That is, the battery pack according to the present disclosure may include the above-mentioned apparatus 100 for managing a battery and at least one battery cell. In addition, the battery pack may further include electrical components (relays, fuses, etc.) and a housing.

[0172] Fig.16 is a diagram showing an exemplary configuration of a battery pack according to another embodiment of the present disclosure.

[0173] The positive terminal of the battery 10 may be connected to the positive terminal P+ of the battery pack 1 , and the negative terminal of the battery 10 may be connected to the negative terminal P− of the battery pack 1 .

[0174] The measuring unit 20 can be connected to the positive terminal and the negative terminal of the battery 10. In addition, the measuring unit 20 can measure the voltage of the battery 10 by measuring the positive electrode potential and the negative electrode potential of the battery 10 and calculating the difference between the positive electrode potential and the negative electrode potential.

[0175] In addition, the measuring unit 20 can be connected to the current measuring unit A. For example, the current measuring unit A may be an ammeter or a shunt resistor capable of measuring the charging current and the discharging current of the battery 10. The measuring unit 20 can calculate the charging amount by measuring the charging current of the battery 10 using the current measuring unit A. In addition, the measuring unit 20 can calculate the discharging amount by measuring the discharging current of the battery 10 through the third sensing line SL3.

[0176] For example, information on the voltage and capacity of the battery 10 measured by the measurement unit 20 may be transmitted to the profile obtaining unit 110. In addition, the profile obtaining unit 110 can directly generate the measurement whole-cell profile M based on the received information on the voltage and capacity.

[0177] As another example, information about the voltage and capacity of the battery 10 measured by the measuring unit 20 may be stored in the storage unit 140. When charging or discharging of the battery 10 is completed, the profile obtaining unit 110 may access the storage unit 140 to obtain the measured full-cell profile M.

[0178] As yet another example, the measurement unit 20 may directly generate the measured full-cell profile line M based on the measured information about the voltage and capacity of the battery 10 . In this case, the generated measured full-cell profile line M may be transmitted to the profile obtaining unit 110 and also stored in the storage unit 140 .

[0179] A charging / discharging device or load can be connected to the positive terminal P+ and the negative terminal P− of the battery pack 1 .

[0180] Fig.17 is a diagram schematically showing a vehicle 1700 according to yet another embodiment of the present disclosure.

[0181] See also Fig.17 , the battery pack according to an embodiment of the present disclosure may be included in a vehicle 1700 such as an electric vehicle (EV) or a hybrid vehicle (HV). In addition, the battery pack 1710 may drive the vehicle 1700 by supplying power to a motor through an inverter included in the vehicle 1700. Here, the battery pack 1710 may include an apparatus 100 for managing a battery. That is, the vehicle 1700 may include an apparatus 100 for managing a battery. In this case, the apparatus 100 for managing a battery may be an on-board diagnostic device included in the vehicle 1700.

[0182] Fig.18 is a diagram schematically illustrating a method for managing a battery according to yet another embodiment of the present disclosure.

[0183] refer to Fig.18, the method for managing a battery may include a profile obtaining step (S100), a profile adjusting step (S200), a profile generating step (S300), and a factor determining step (S400).

[0184] Preferably, each step of the method for managing a battery can be performed by the apparatus for managing a battery 100. Hereinafter, for the convenience of explanation, the contents overlapping with the above contents will be omitted or briefly described.

[0185] The profile obtaining step ( S100 ) is a step of obtaining a measured all-cell profile M indicating a corresponding relationship between a voltage and a capacity of a battery, and can be performed by the profile obtaining unit 110 .

[0186] For example, the section line obtaining unit 110 may directly receive the measured full-cell section line M of the battery from the outside. That is, the section line obtaining unit 110 can obtain the measured full-cell section line M by connecting to the outside by wire and / or wirelessly and receiving the measured full-cell section line M.

[0187] As another example, the profile obtaining unit 110 may receive battery information about the voltage and capacity of the battery. In addition, the profile obtaining unit 110 can obtain the measured full-cell profile M by generating the measured full-cell profile M based on the received battery information.

[0188] The profile adjustment step ( S200 ) is a step of adjusting the preset standard positive and negative profiles Rp and Rn to correspond to the measured full-cell profile M or a plurality of sections of the measured full-cell profile M, and can be performed by the profile determination unit 120 .

[0189] In one embodiment, when the measured full-cell section line M is divided into a plurality of sections, the section line determination unit 120 may adjust the standard positive section line Rp and the standard negative section line Rn to correspond to each section of the measured full-cell section line M. Here, when the plurality of sections are divided into n sections (n ​​is a natural number of 2 or greater), the standard positive section line Rp and the standard negative section line Rn can be adjusted for the n sections. That is, an adjustment result of the standard positive section line Rp and the standard negative section line Rn can be derived (see Fig.11 ) or n adjusted results (see Figure 8 ).

[0190] exist Figure 8 In the embodiment of the present invention, the profile determination unit 120 can adjust the standard positive profile Rp and the standard negative profile Rn to correspond to each of the first to eighth sections R1 to R8. In this case, the adjustment result of each of the first to eighth sections R1 to R8 can be derived. That is, eight adjustment results of the standard positive profile Rp and the standard negative profile Rn can be derived.

[0191] exist Fig.11 In the embodiment of the present invention, the section line determination unit 120 can determine the target section in the first to fifth sections R1 to R5 of the full-cell section line M, and adjust the standard positive section line Rp and the standard negative section line Rn so that the error rate in the target section is the lowest. In this case, an adjustment result of the standard positive section line Rp and the standard negative section line Rn can be derived.

[0192] In another embodiment, when the measured full-cell section line M is not divided into a plurality of sections, the section line determination unit 120 may adjust the standard positive section line Rp and the standard negative section line Rn to correspond to the entire section of the measured full-cell section line M. Here, one adjustment result of the standard positive section line Rp and the standard negative section line Rn can be derived.

[0193] exist Fig.15 In the embodiment of the present invention, the profile determination unit 120 may divide the standard positive profile Rp and / or the standard negative profile Rn into a plurality of electrode segments, and adjust each of the plurality of electrode segments to correspond to the measured full-cell profile M.

[0194] The profile generating step ( S300 ) is a step of generating an adjusted positive electrode profile Rp′ and an adjusted negative electrode profile Rn′ according to the adjustment result, and can be performed by the profile determining unit 120 .

[0195] For example, in Figure 8 In the embodiment of the present invention, the section line determination unit 120 can determine the first to eighth adjusted positive section lines Rp1' to Rp8' and the first to eighth adjusted negative section lines Rn1' to Rn8' for the first to eighth sections R1 to R8. The first comparison full-cell section line S1 can be determined based on the plurality of adjusted positive section lines Rp1' to Rp8' and the plurality of adjusted negative section lines Rn1' to Rn8'.

[0196] As another example, in Fig.11 In the embodiment, the profile determination unit 120 can determine the adjusted positive profile Rp' and the adjusted negative profile Rn' with the lowest error rate for the determined target section. The second comparison full-cell profile S2 can be determined based on the adjusted positive profile Rp' and the adjusted negative profile Rn'.

[0197] As another example, in Fig.15 In the embodiment of the present invention, the section line determination unit 120 can determine the adjusted positive section line Rp' and the adjusted negative section line Rn' by adjusting the first to fifth positive sections PR1 to PR5 and the first to fourth negative sections NR1 to NR4 respectively. The third comparison full-cell section line S3 can be determined based on the adjusted positive section line Rp' and the adjusted negative section line Rn'.

[0198] The factor determination step ( S400 ) is a step of determining a positive electrode factor of a battery from the adjusted positive electrode profile line Rp′ and determining a negative electrode factor of a battery from the adjusted negative electrode profile line Rn′, and can be performed by the control unit 130 .

[0199] Specifically, the control unit 130 can determine the positive electrode participation starting point, positive electrode participation end point and positive electrode change rate in the adjusted positive electrode profile Rp', and determine the negative electrode participation starting point, negative electrode participation end point and negative electrode change rate in the adjusted negative electrode profile Rn'.

[0200] The embodiments of the present disclosure described above may be implemented not only by devices and methods, but may be implemented by a program that implements functions corresponding to the configuration of the embodiments of the present disclosure or a recording medium on which the program is recorded. Based on the above description of the embodiments, those skilled in the art may easily implement the program or recording medium.

[0201] The present disclosure has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present disclosure, are given by way of illustration only, since various changes and modifications within the scope of the present disclosure will become apparent to those skilled in the art from this detailed description.

[0202] In addition, without departing from the technical aspects of the present disclosure, those skilled in the art may make many substitutions, modifications and changes to the present disclosure, and the present disclosure is not limited to the above-mentioned embodiments and drawings, and each embodiment may be selectively combined in part or as a whole to allow various modifications.

[0203] (Explanation of Reference Numerals)

[0204] 1: Battery Pack

[0205] 10: Battery

[0206] 20: Measurement unit

[0207] 100: Device for managing battery

[0208] 110: Section line acquisition unit

[0209] 120: Section line determination unit

[0210] 130: Control unit

[0211] 140: Storage unit

[0212] 1700: Vehicles

[0213] 1710: Battery Pack

Claims

1. A device for managing a battery, comprising: a profile obtaining unit configured to obtain a measured full-cell profile indicating a corresponding relationship between a voltage and a capacity of a battery; a profile determination unit configured to adjust a preset standard positive electrode profile and a preset standard negative electrode profile to correspond to the measured full-cell profile or a plurality of sections of the measured full-cell profile, and generate an adjusted positive electrode profile and an adjusted negative electrode profile according to an adjustment result; as well as A control unit is configured to determine a diagnostic factor of the battery from at least one of the adjusted positive electrode profile and the adjusted negative electrode profile.

2. The device for managing a battery according to claim 1, in, The profile obtaining unit is configured to further obtain a full-cell differential profile corresponding to the measured full-cell profile and indicating a corresponding relationship between capacity and differential voltage, and The section line determination unit is configured to divide the measured full-monomer section line into the plurality of sections based on at least one of the plurality of peaks included in the full-monomer differential section line.

3. The device for managing a battery according to claim 2, in, The profile determination unit is configured to divide the measured whole-cell profile into the plurality of sections based on the volumes of the plurality of peaks included in the whole-cell differential profile.

4. The device for managing a battery according to claim 2, in, The profile determining unit is configured to generate the adjusted positive profile and the adjusted negative profile corresponding to each of the plurality of sections by adjusting the standard positive profile and the standard negative profile to correspond to each of the plurality of sections.

5. The device for managing a battery according to claim 4, in, The profile determination unit is configured to generate multiple adjusted positive profiles so that the end point of the adjusted positive profile of the previous segment is the same as the starting point of the adjusted positive profile of the next segment, and to generate multiple adjusted negative profiles so that the end point of the adjusted negative profile of the previous segment is the same as the starting point of the adjusted negative profile of the next segment.

6. The device for managing a battery according to claim 2, in, The profile determination unit is configured to divide the measured whole-monomer profile into the plurality of sections based on a plurality of reference peaks included in the whole-monomer differential profile.

7. The device for managing a battery according to claim 6, in, The profile determination unit is configured to set a weight for each of the plurality of sections and adjust the standard positive electrode profile and the standard negative electrode profile based on the weight to correspond to the measured full-cell profile.

8. The device for managing a battery according to claim 7, in, The profile determination unit is configured to set a weight of a target segment including at least one of a plurality of target peaks included in the all-monomer differential profile to be greater than weights of the remaining segments.

9. The device for managing a battery according to claim 7, in, The profile determination unit is configured to generate a comparative full-cell profile based on the adjusted positive profile and the adjusted negative profile, and adjust the standard positive profile and the standard negative profile so that as the segment has a larger set weight, the error rate between the comparative full-cell profile and the measured full-cell profile is reduced.

10. The device for managing a battery according to claim 1, in, The section line obtaining unit is configured to obtain at least one of a positive electrode differential section line corresponding to the standard positive electrode section line and a negative electrode differential section line corresponding to the standard negative electrode section line as an electrode differential section line, and Wherein, the profile determination unit is configured to divide the corresponding standard electrode profile among the standard positive electrode profile and the standard negative electrode profile into multiple electrode segments based on at least one of the multiple electrode peaks included in the electrode differential profile, and adjust the standard positive electrode profile and the standard negative electrode profile to correspond to the measured full-cell profile while adjusting each of the multiple electrode segments.

11. The device for managing a battery according to claim 10, in, The profile determination unit is configured to independently adjust each of the plurality of electrode segments.

12. The device for managing a battery according to claim 10, in, When the positive differential section line is included in the electrode differential section line, the section line determination unit is configured to divide the standard positive section line into a plurality of positive sections based on at least one of the plurality of positive peaks included in the positive differential section line, and Wherein, when the negative differential section line is included in the electrode differential section line, the section line determination unit is configured to divide the standard negative section line into a plurality of negative sections based on at least one of the plurality of negative peaks included in the negative differential section line.

13. A battery pack, comprising the device for managing a battery according to any one of claims 1 to 12.

14. A vehicle comprising the device for managing a battery according to any one of claims 1 to 12.

15. A method for managing a battery, comprising: a profile obtaining step of obtaining a measured full-cell profile indicating a corresponding relationship between a voltage and a capacity of a battery; A section line adjustment step, wherein the section line adjustment step adjusts a preset standard positive electrode section line and a preset standard negative electrode section line to correspond to the measured full-cell section line or a plurality of sections of the measured full-cell section line; A section line generating step, wherein the section line generating step generates an adjusted positive electrode section line and an adjusted negative electrode section line according to the adjustment result; as well as A factor determining step of determining a diagnostic factor of the battery from at least one of the adjusted positive electrode profile and the adjusted negative electrode profile.

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