Vehicle state estimation device and operation method thereof

Abstract

A vehicle state estimation device according to one embodiment disclosed in this document may include a current sensor and a processor, and the processor may be configured to acquire a current profile of a battery pack of the vehicle using the current sensor, extract low-frequency components below a specified frequency from the current profile, and estimate, as a charging section of the battery pack, a first flat section in which the current value of the low-frequency component is greater than or equal to a first specified current value and the change in current is maintained below a first threshold for a specified time or more.

Description

[Technical Field]

[0001] The present invention claims the benefit of priority based on Korean Patent Application No. 10-2022-0118197, filed on September 19, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] FIELD OF THE INVENTION The embodiments disclosed herein relate to a vehicle state estimation device and method of operation. [Background technology]

[0003] In recent years, research and development into secondary batteries has been actively conducted. Here, secondary batteries are rechargeable batteries, and include both conventional Ni / Cd batteries, Ni / MH batteries, and the more recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries have the advantage of having a much higher energy density than conventional Ni / Cd batteries, Ni / MH batteries, and the like. In addition, lithium-ion batteries can be manufactured to be compact and lightweight, and are used as power sources for mobile devices. In recent years, their use has expanded to include power sources for electric vehicles, and they are attracting attention as a next-generation energy storage medium.

[0004] An electric vehicle may be in a running or stopped state when the battery is discharging, and may be in a running or stopped state when the battery is charging. In other words, whether the electric vehicle is running or not does not directly match the charging or discharging of the battery, so various signals must be collected to estimate the state of the electric vehicle. Summary of the Invention [Problem to be solved by the invention]

[0005] However, because the types and resolutions of signals that can be collected differ depending on the vehicle, different methods for estimating the vehicle's state must be applied depending on the situation, which poses the problem of high cost and time.

[0006] An object of the embodiments disclosed herein is to provide a vehicle state estimation device and an operating method thereof that can estimate the state of a vehicle.

[0007] An object of the embodiments disclosed herein is to provide a vehicle state estimation device and an operating method thereof that can estimate the vehicle state based on current data of a battery pack.

[0008] An object of the embodiments disclosed herein is to provide a vehicle state estimation device and an operating method thereof that can additionally correct the vehicle state based on vehicle speed data.

[0009] The technical problems of the embodiments disclosed in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0010] A vehicle state estimation device according to one embodiment disclosed in this document may include a current sensor and a processor, and the processor may be configured to acquire a current profile of a battery pack of the vehicle using the current sensor, extract low-frequency components below a specified frequency from the current profile, and estimate, as a charging section of the battery pack, a first flat section in which the current value of the low-frequency component is greater than or equal to a first specified current value and the change in current is maintained below a first threshold for a specified time or more.

[0011] According to one embodiment disclosed herein, the charging interval includes a fast charging interval and / or a slow charging interval, and the processor may be configured to estimate at least a portion of the first flat interval as the fast charging interval or the slow charging interval based on a current value of the first flat interval.

[0012] According to one embodiment disclosed in this document, the processor may be configured to estimate a section of the first flat section in which the current value is equal to or greater than a second specified current value as the fast charge section, and to estimate a section of the first flat section in which the current value is less than the second specified current value as the slow charge section.

[0013] According to one embodiment disclosed herein, the processor may be configured to estimate at least a portion of a second flat section in the current profile, in which the change in current remains below a second threshold for a specified time or more, as a stopping section of the vehicle.

[0014] According to one embodiment disclosed in this document, the processor may be configured to estimate, as the stop section, a section of the second flat section in which the current value is equal to or less than 0 A (ampere).

[0015] According to one embodiment disclosed in this document, the processor may be configured to extract a first section from the current profile excluding the first flat section and a second flat section in which the change in current is maintained below a second threshold for a specified time or more, and to estimate at least a portion of the first section as a driving section or a regenerative braking section of the vehicle based on the current value of the first section.

[0016] According to one embodiment disclosed in this document, the processor may be configured to estimate a second section of the first section in which the current value is a positive number as the regenerative braking section, and to estimate a third section of the first section in which the current value is a negative number as the driving section.

[0017] According to one embodiment disclosed herein, the processor may be configured to obtain parameters related to an estimation of the state of the vehicle and to additionally correct the state of the vehicle based on the parameters.

[0018] According to one embodiment disclosed herein, the parameters may include travel speed information of the vehicle.

[0019] A vehicle state estimation device according to one embodiment disclosed herein may include a display, and the processor may be configured to display information regarding the vehicle state on the display.

[0020] In a vehicle state estimation device according to one embodiment disclosed in this document, the processor may be configured to use the communication circuit to transmit data including information regarding the state of the vehicle to an external electronic device, and the data may include at least one instruction that causes the external electronic device to output a specified alarm including information regarding the state of the vehicle via a user interface.

[0021] A vehicle state estimation method according to one embodiment disclosed in this document may include operations of acquiring a current profile of a battery pack of the vehicle, extracting low-frequency components below a specified frequency from the current profile, and estimating, as a charging section of the battery pack, a first flat section in which the current value of the low-frequency components is greater than or equal to a first specified current value and the change in current is maintained below a first threshold for a specified time or more.

[0022] According to one embodiment disclosed in this document, the charging section includes a fast charging section and / or a slow charging section, and the vehicle state estimation method may include an operation of estimating at least a portion of the first flat section as the fast charging section or the slow charging section based on a current value of the first flat section.

[0023] A vehicle state estimation method according to one embodiment disclosed in this document may include an operation of estimating at least a portion of a second flat section in the current profile, in which the change in current remains below a second threshold for a specified time or more, as a stopping section of the vehicle.

[0024] A vehicle state estimation method according to one embodiment disclosed in this document may include an operation of extracting a first section from the current profile excluding the first flat section and a second flat section in which the change in current is maintained below a second threshold for a specified time or more, and an operation of estimating at least a portion of the first section as a driving section or a regenerative braking section of the vehicle based on the current value of the first section.

[0025] A method for estimating a state of a vehicle according to one embodiment disclosed herein may include an operation of obtaining parameters related to estimating the state of the vehicle, and an operation of additionally correcting the state of the vehicle based on the parameters. [Effects of the Invention]

[0026] The embodiments disclosed herein allow for reliable estimation of the vehicle state based on battery pack current data.

[0027] According to the embodiments disclosed herein, the accuracy of vehicle state estimation can be improved by additionally correcting the vehicle state based on vehicle speed data.

[0028] In addition, various other effects are provided that are directly or indirectly understood by this document. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a block diagram of a vehicle including a vehicle state estimation device according to an embodiment. [Figure 2] 3 is an operation flowchart of the vehicle state estimation device according to an embodiment. [Figure 3] 3 is an operation flowchart of the vehicle state estimation device according to an embodiment. [Figure 4] FIG. 1 is a diagram illustrating an example in which a vehicle state estimation device according to an embodiment estimates a charging interval of a battery pack. [Figure 5] 3 is an operation flowchart of the vehicle state estimation device according to an embodiment. [Figure 6]FIG. 1 is a diagram illustrating an example in which a vehicle state estimation device according to an embodiment estimates a vehicle stopping section. [Figure 7] 3 is an operation flowchart of the vehicle state estimation device according to an embodiment. [Figure 8] FIG. 2 is a diagram showing a screen provided by a display of a vehicle state estimation device according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0030] Various embodiments of the present invention will now be described with reference to the accompanying drawings, but it should be understood that the present invention is not limited to the particular embodiments, but also includes various modifications, equivalents, and / or alternatives to the embodiments of the present invention.

[0031] The various embodiments and terms used in this document should not be understood to limit the technical features described in this document to a particular embodiment, but should be understood to include various modifications, equivalents, or alternatives of the embodiment. In connection with the description of the drawings, like reference numerals are used for like or related components. The singular form of a noun corresponding to an item may include one or more of the said item, unless the relevant context clearly indicates otherwise.

[0032] In this document, each phrase such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," "at least one of A, B or C," etc., may include any one of the items listed together in the phrase, or all possible combinations thereof. Terms such as "first," "second," "first," "second," "A," "B," "(a)," "(b)," etc., are used merely to distinguish one element from other elements and do not limit the element in other respects (e.g., importance or order) unless specifically stated to the contrary.

[0033] In this document, when a (e.g., first) component is referred to as being "coupled," "coupled," or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively," or when a reference is made to being "coupled" or "connected," it means that the component can be connected to the other component directly (e.g., by wire), wirelessly, or through a third component.

[0034] According to one embodiment, methods according to various embodiments disclosed herein may be provided in a computer program product. The computer program product may be traded as a commodity between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read-only memory (CD-ROM)) or distributed online (e.g., downloaded or uploaded) via an application store or directly between two user devices. In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or ad-hoc generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store server, or an intermediary server.

[0035] According to various embodiments, each of the above components (e.g., modules or programs) may include one or more individuals, and some of the individuals may be located separately in other components. According to various embodiments, one or more of the above-described components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner to those performed by the individual components of the multiple components before the integration. According to various embodiments, operations performed by modules, programs, or other components may be performed sequentially, in parallel, iteratively, or heuristically, and one or more of the operations may be performed in a different order, omitted, or one or more other operations may be added.

[0036] FIG. 1 is a block diagram of a vehicle including a vehicle state estimation device according to an embodiment.

[0037] 1 , vehicle 100 may include a battery pack 110, a vehicle state estimator 120, a display 130, and / or a communication circuit 140. According to one embodiment, vehicle 100 may be an electric vehicle that utilizes electric energy. According to some embodiments, vehicle 100 may omit at least one of the components of FIG. 1 or may include one or more other components. According to some embodiments, some of the components may be implemented in a single integrated circuit.

[0038] According to an embodiment, the battery pack 110 may include a battery module including at least one battery cell and capable of being charged and discharged. The battery pack 110 may also include a battery management system (BMS) that performs functions such as measuring electrical characteristics such as current and voltage, controlling charging and discharging, controlling voltage equalization, estimating a state of charge (SOC), and estimating a state of health (SOH).

[0039] The vehicle state estimator 120 may include a current sensor 121 and / or a processor 123 .

[0040] The current sensor 121 may be electrically connected to the battery pack 110. According to one embodiment, the current sensor 121 may measure the current of the battery pack 110. The current sensor 121 may communicate a current profile of the battery pack 110 to the processor 123 based on the measured current value.

[0041] According to one embodiment, the current sensor 121 may receive a measurement control signal from the processor 123 to measure the current of the battery pack 110 while the charging current is flowing. The current sensor 121 may measure the current of the battery pack 110 each time the current sensor 121 receives a measurement control signal from the processor 123.

[0042] The processor 123 may be electrically connected to the current sensor 121, the display 130, and / or the communication circuit 140. According to one embodiment, the processor 123 may execute software to control at least one other component connected to the processor 123 and perform various data processing or calculations. According to one embodiment, the processor 123 may control at least one other component connected to the processor 123 to control the overall operation of the vehicle state estimation device 120. The processor 123 may include at least one of processing devices such as application specific integrated circuits (ASICs), digital signal processors (DSPs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), central processing units (CPUs), microcontrollers, and microprocessors.

[0043] According to one embodiment, the processor 123 can obtain a current profile of the battery pack 110. According to one embodiment, the processor 123 can obtain the current profile of the battery pack 110 using the current sensor 121. For example, the processor 123 can obtain the current profile by measuring a current value of the battery pack 110 over a specified time interval using the current sensor 121.

[0044] According to one embodiment, the processor 123 can estimate the state of the vehicle based on the obtained current profile.

[0045] According to one embodiment, the processor 123 can extract low-frequency components below a specified frequency from the acquired current profile. According to one embodiment, the processor 123 can extract low-frequency components below a specified frequency from the current profile using a low pass filter (LPF).

[0046] According to one embodiment, the processor 123 can extract a first flat section from the acquired low-frequency component. According to one embodiment, the processor 123 can extract the first flat section from the low-frequency component using an STD (standard deviation) filter. Here, the STD filter may refer to a filter that extracts a section from a current profile where the standard deviation is equal to or less than a specified level. According to one embodiment, the processor 123 can use the STD filter to extract from the low-frequency component a first flat section where the current value is equal to or greater than a first specified current value and the change in current is maintained equal to or less than a first threshold for at least a specified time.

[0047] According to an embodiment, the processor 123 may estimate the extracted first flat section as a charging section of the battery pack 110. Here, the charging section refers to a section in which power is supplied to the battery pack 110 from an external power source. According to an embodiment, the processor 123 may estimate, from the extracted first flat section, a section in which the current value is equal to or greater than a second designated current value as a fast charging section. Furthermore, the processor 123 may estimate, from the extracted first flat section, a section in which the current value is less than the second designated current value as a slow charging section. Here, the second designated current value may be greater than the first designated current value.

[0048] According to one embodiment, the processor 123 can extract a second flat section from the acquired current profile. According to one embodiment, the processor 123 can extract the second flat section from the current profile using an STD filter. According to one embodiment, the processor 123 can extract the second flat section, in which the change in current is maintained below a second threshold for at least a specified time, using the STD filter.

[0049] According to one embodiment, the processor 123 can estimate at least a portion of the extracted second flat section as a stop section of the vehicle 100. According to one embodiment, the processor 123 can estimate, among the second flat section, a section in which the current value is equal to or less than a third designated value as a stop section of the vehicle 100. For example, the third designated value may be 0 A (ampere). In this case, the processor 123 can estimate, among the second flat section, a section in which the current value is 0 A and / or a section in which the current value is a negative number as a stop section of the vehicle 100. Here, a section in which the current value is a negative number may mean a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 discharges.

[0050] According to one embodiment, the processor 123 can extract a first section excluding the first flat section and the second flat section from the current profile. The processor 123 can estimate at least a portion of the first section as a driving section or a regenerative braking section based on the current value of the first section. According to one embodiment, the processor 123 can estimate a second section of the first section, in which the current value is a positive number, as a regenerative braking section. Furthermore, the processor 123 can estimate a third section of the first section, in which the current value is a negative number, as a driving section. Here, the section in which the current value is a positive number may mean a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is charged, and the section in which the current value is a negative number may mean a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is discharged.

[0051] According to one embodiment, the processor 123 can acquire parameters related to vehicle state estimation. According to one embodiment, the parameters related to vehicle state estimation may include traveling speed information of the vehicle 100. For example, the traveling speed information may include traveling speed information of the vehicle 100 in a time interval corresponding to the current profile.

[0052] According to one embodiment, the processor 123 can further correct the state of the vehicle 100 based on the acquired parameters. According to one embodiment, the processor 123 can correct only sections of the estimated charging sections where the speed of the vehicle 100 is a specified value to charging sections. For example, the specified value may be set to 0. According to one embodiment, the processor 123 can correct only sections of the estimated stop sections where the speed of the vehicle 100 is a specified value to stop sections. For example, the specified value may be set to 0 km / h. According to one embodiment, the processor 123 can correct only sections of the estimated driving sections where the speed of the vehicle 100 is equal to or greater than a specified value to driving sections. For example, the specified value may be set to 1 km / h.

[0053] According to one embodiment, processor 123 may provide information to a user regarding the vehicle state. According to one embodiment, processor 123 may provide a user with information regarding the vehicle state estimated by the above-described operations and / or information regarding the vehicle state corrected by the above-described operations.

[0054] According to one embodiment, the processor 123 can display information about the vehicle status on the display 130. According to one embodiment, the processor 123 can transmit information about the vehicle status to an external electronic device via the communication circuit 140. The external electronic device can display the received information about the vehicle status on a display of the external electronic device.

[0055] Display 130 may be located inside vehicle 100. For example, display 130 may be a liquid crystal display, a light emitting diode (LED) display, an organic LED (OLED) display, or an electronic ink (E-INK) display. Display 130 may output a user interface that can operate and output various functions that can be performed by vehicle 100. According to one embodiment, display 130 may display a screen that includes information regarding the status of the vehicle received from processor 123.

[0056] The communications circuitry 140 may transmit and receive data to and from an external electronic device and / or an external server via wired or wireless communication. According to one embodiment, the communications circuitry 140 may transmit data including information regarding the vehicle status received from the processor 123 to the external electronic device and / or the external server. According to one embodiment, the data may include instructions to cause the external electronic device to output a specified alarm via a user interface (e.g., display, speaker).

[0057] 2 is a flowchart showing the operation of the vehicle state estimation device according to one embodiment. FIG. 2 will be explained using the configuration of FIG.

[0058] The embodiment shown in FIG. 2 is just one embodiment, and the order of steps according to various embodiments of the present invention may differ from that shown in FIG. 2, and some steps shown in FIG. 2 may be omitted, the order between steps may be changed, or steps may be combined.

[0059] According to one embodiment, operations 205-225 may be understood to occur in processor 123 of vehicle state estimator 120.

[0060] 2 , in operation 205, the vehicle state estimator 120 can acquire a current profile of the battery pack 110. According to one embodiment, the vehicle state estimator 120 can acquire the current profile of the battery pack 110 using a current sensor 121. For example, the vehicle state estimator 120 can acquire the current profile by measuring a current value of the battery pack 110 over a specified time interval using the current sensor 121.

[0061] In operation 210 , the vehicle state estimator 120 may estimate the state of the vehicle based on the current profile obtained in operation 205 .

[0062] According to one embodiment, the vehicle state estimation device 120 can extract low-frequency components below a specified frequency from the current profile. The vehicle state estimation device 120 can estimate, as a charging section of the battery pack 110, a first flat section in the low-frequency components, where the current value is equal to or greater than a first specified current value and the change in current is maintained below a first threshold for at least a specified time.

[0063] According to one embodiment, the vehicle state estimation device 120 can estimate at least a portion of a second flat section in the current profile where the change in current is maintained below a second threshold for a specified period of time or more as a stopping section of the vehicle 100.

[0064] According to one embodiment, the vehicle state estimation device 120 can extract a first section excluding the first flat section and the second flat section. The vehicle state estimation device 120 can estimate at least a part of the first section as a driving section or a regenerative braking section of the vehicle based on a current value of the first section.

[0065] The operation of vehicle state estimating device 120 to estimate the vehicle state based on the current profile will be specifically described later with reference to FIGS. 3 to 7. FIG.

[0066] In operation 215, the vehicle state estimator 120 may acquire parameters related to vehicle state estimation. According to one embodiment, the parameters related to vehicle state estimation may include traveling speed information of the vehicle 100. For example, the traveling speed information may include traveling speed information of the vehicle 100 in a time interval corresponding to the current profile acquired in operation 205.

[0067] In operation 220 , the vehicle state estimator 120 may further correct the state of the vehicle 100 based on the parameters obtained in operation 215 .

[0068] According to one embodiment, the vehicle state estimation device 120 may correct, among the charging sections estimated in operation 210, only sections in which the speed of the vehicle 100 is a specified value to be charging sections. For example, the specified value may be set to 0.

[0069] According to one embodiment, the vehicle state estimation device 120 can correct only the stop sections estimated in operation 210 where the speed of the vehicle 100 is a specified value to the stop sections. For example, the specified value may be set to 0 km / h.

[0070] According to one embodiment, the vehicle state estimation device 120 can correct the travel section to only the section where the speed of the vehicle 100 is equal to or greater than a specified value, among the travel sections estimated in operation 210. For example, the specified value may be set to 1 km / h.

[0071] In operation 225, the vehicle state estimator 120 may provide information about the vehicle state to a user. According to one embodiment, the vehicle state estimator 120 may provide information about the vehicle state estimated in operation 210 and / or information about the vehicle state corrected in operation 220 to a user.

[0072] According to one embodiment, the vehicle state estimation device 120 can display information about the vehicle state on the display 130. According to one embodiment, the vehicle state estimation device 120 can transmit information about the vehicle state to an external electronic device via the communication circuit 140. The external electronic device can display the received information about the vehicle state on a display of the external electronic device.

[0073] The information about the vehicle status provided to the user in operation 225 will be explained in detail below with reference to FIG.

[0074] 3 is a flowchart showing the operation of the vehicle state estimation device according to one embodiment. FIG. 3 will be described using the configuration of FIG.

[0075] The embodiment shown in FIG. 3 is just one embodiment, and the order of steps according to various embodiments of the present invention may differ from that shown in FIG. 3, and some steps shown in FIG. 3 may be omitted, the order between steps may be changed, or steps may be combined.

[0076] According to one embodiment, operations 305-320 may be understood to be performed by processor 123 of vehicle state estimator 120.

[0077] 3 , in operation 305, the vehicle state estimator 120 can acquire a current profile of the battery pack 110. According to one embodiment, the vehicle state estimator 120 can acquire the current profile of the battery pack 110 using a current sensor 121. For example, the vehicle state estimator 120 can acquire the current profile by measuring a current value of the battery pack 110 over a specified time interval using the current sensor 121.

[0078] In Operation 310, the vehicle state estimator 120 can extract low-frequency components equal to or lower than a specified frequency from the current profile acquired in Operation 305. According to one embodiment, the vehicle state estimator 120 can extract low-frequency components equal to or lower than a specified frequency from the current profile using an LPF.

[0079] In Operation 315, the vehicle state estimator 120 can extract flat sections from the low-frequency components acquired in Operation 310. According to one embodiment, the vehicle state estimator 120 can extract flat sections from the low-frequency components using an STD filter. According to one embodiment, the vehicle state estimator 120 can extract flat sections from the low-frequency components using an STD filter, where the current value is equal to or greater than a first specified current value and the change in current is maintained equal to or less than a first threshold for at least a specified time.

[0080] The operations of extracting low-frequency components from the current profile in operation 310 and operation 315 and extracting flat sections from the extracted low-frequency components will be specifically described later with reference to FIG.

[0081] In OPERATION 320, the vehicle state estimation device 120 may estimate the flat section extracted in OPERATION 315 as a charging section of the battery pack 110. Here, the charging section refers to a section in which power is supplied to the battery pack 110 from an external power source. According to an embodiment, the vehicle state estimation device 120 may estimate, among the flat sections extracted in OPERATION 315, a section in which the current value is equal to or greater than a second designated current value as a fast charging section. Furthermore, the vehicle state estimation device 120 may estimate, among the flat sections extracted in OPERATION 315, a section in which the current value is less than the second designated current value as a slow charging section. Here, the second designated current value may be greater than the first designated current value.

[0082] When the battery pack 110 of the vehicle 100 is being charged, the current value of the battery pack 110 is a current value in the charging direction and is maintained for a predetermined time. As a result, by extracting only the low-frequency components from the current profile in operation 310 and extracting a flat section from the extracted low-frequency components in operation 315, the charging section of the battery pack 110 can be estimated with high reliability.

[0083] 4 is a diagram showing an example in which a vehicle state estimation device according to an embodiment estimates a charging section of a battery pack. FIG. 4 will be described using the configuration of FIG.

[0084] Graph 400 of Figure 4 includes a current profile and a low-frequency component of the battery pack 110. Here, the current profile corresponds to the current profile of the battery pack 110 obtained in operation 305 of Figure 3. Also, the low-frequency component corresponds to the low-frequency component extracted in operation 310 of Figure 3.

[0085] The low-frequency component may include a current flat section 410. The current flat section 410 may include a first flat section 411, a second flat section 412, a third flat section 413, a fourth flat section 414, and a fifth flat section 415. The first to fifth flat sections 411 to 415 may each refer to a section in which the current value is equal to or greater than a first specified current value and the change in current is maintained equal to or less than a first threshold value for a specified period of time or more.

[0086] According to one embodiment, each of the first flat section 411 to the fifth flat section 415 corresponds to the flat section extracted in operation 315 of Fig. 3. In this case, the vehicle state estimation device 120 can estimate each of the first flat section 411 to the fifth flat section 415 as a charging section for the battery pack 110.

[0087] According to one embodiment, the entire current plateau section 410 corresponds to the plateau section extracted in operation 315 of Figure 3. In this case, the vehicle state estimation device 120 can estimate the entire current plateau section 410 as the charging section of the battery pack 110.

[0088] According to one embodiment, the vehicle state estimation device 120 can estimate, as fast charge sections, sections among the first flat section 411 to the fifth flat section 415, in which the current value is equal to or greater than a second designated current value. Furthermore, the vehicle state estimation device 120 can estimate, as slow charge sections, sections among the first flat section 411 to the fifth flat section 415, in which the current value is less than the second designated current value. Here, the second designated current value may be greater than the first designated current value. For example, the vehicle state estimation device 120 can estimate, as fast charge sections, the first flat section 411, the second flat section 412, and the third flat section 413, in which the current value is equal to or greater than the second designated current value, and can estimate, as slow charge sections, the fourth flat section 414 and the fifth flat section 415, in which the current value is less than the second designated current value.

[0089] 5 is a flowchart showing the operation of the vehicle state estimation device according to one embodiment. FIG. 5 will be described using the configuration of FIG.

[0090] The embodiment shown in FIG. 5 is just one embodiment, and the order of steps according to various embodiments of the present invention may differ from that shown in FIG. 5, and some steps shown in FIG. 5 may be omitted, the order between steps may be changed, or steps may be combined.

[0091] According to one embodiment, operations 505-515 may be understood to occur in the processor 123 of the vehicle state estimator 120.

[0092] 5, in operation 505, the vehicle state estimator 120 can acquire a current profile of the battery pack 110. According to one embodiment, the vehicle state estimator 120 can acquire the current profile of the battery pack 110 using the current sensor 121. For example, the vehicle state estimator 120 can acquire the current profile by measuring a current value of the battery pack 110 over a specified time interval using the current sensor 121.

[0093] In Operation 510, the vehicle state estimator 120 can extract flat sections from the current profile acquired in Operation 505. According to one embodiment, the vehicle state estimator 120 can extract flat sections from the current profile using an STD filter. According to one embodiment, the vehicle state estimator 120 can extract flat sections in which the change in current is maintained below a second threshold for at least a specified time using the STD filter.

[0094] The operation of extracting a flat section from the current profile in operation 510 will be specifically described later with reference to FIG.

[0095] In operation 515, the vehicle state estimation device 120 can estimate at least a portion of the flat section extracted in operation 510 as a stop section of the vehicle 100. According to one embodiment, the vehicle state estimation device 120 can estimate, among the flat sections, a section in which the current value is equal to or less than a third specified value as a stop section of the vehicle 100. For example, the third specified value may be 0 A (ampere). In this case, the vehicle state estimation device 120 can estimate, among the flat sections, a section in which the current value is 0 A and / or a section in which the current value is a negative number as a stop section of the vehicle 100. Here, a section in which the current value is a negative number may mean a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is discharging.

[0096] When the vehicle 100 is stopped, the current value of the battery pack 110 is maintained for a predetermined time, so that the stopping section of the vehicle 100 can be estimated with high reliability by extracting a flat section from the current profile in operation 510.

[0097] 6 is a diagram showing an example in which a vehicle state estimation device according to an embodiment estimates a vehicle stop section. FIG. 6 will be described using the configuration of FIG.

[0098] Graph 600 of Figure 6 illustrates the current profile of battery pack 110, where the current profile corresponds to the current profile of battery pack 110 obtained in operation 505 of Figure 5.

[0099] The current profile may include at least one current plateau section 601 to 607. Each of the at least one current plateau section 601 to 607 may refer to a section in which the change in current is maintained at or below a second threshold for at least a specified time.

[0100] According to one embodiment, at least one of the flat current sections 601-607 corresponds to the flat section extracted in operation 510 of Figure 5. In this case, the vehicle state estimation device 120 can estimate at least a portion of the at least one flat current section 601-607 as a stop section of the vehicle 100. According to one embodiment, the vehicle state estimation device 120 can estimate, among the at least one flat current section 601-607, a section in which the current value is equal to or less than a third designated value as a stop section of the vehicle 100. For example, the third designated value may be 0 A (ampere).

[0101] 7 is a flowchart showing the operation of the vehicle state estimation device according to one embodiment. FIG. 7 will be explained using the configuration of FIG.

[0102] The embodiment shown in FIG. 7 is just one embodiment, and the order of steps according to various embodiments of the present invention may differ from that shown in FIG. 7, and some steps shown in FIG. 7 may be omitted, the order between steps may be changed, or steps may be combined.

[0103] According to one embodiment, operations 705-740 may be understood to be performed by the processor 123 of the vehicle state estimator 120.

[0104] 7, in operation 705, the vehicle state estimator 120 can acquire a current profile of the battery pack 110. According to one embodiment, the vehicle state estimator 120 can acquire the current profile of the battery pack 110 using the current sensor 121. For example, the vehicle state estimator 120 can acquire the current profile by measuring a current value of the battery pack 110 over a specified time interval using the current sensor 121.

[0105] In operation 710, the vehicle state estimator 120 can extract low-frequency components equal to or lower than a specified frequency from the current profile acquired in operation 705. According to one embodiment, the vehicle state estimator 120 can extract low-frequency components equal to or lower than a specified frequency from the current profile using an LPF.

[0106] In Operation 715, the vehicle state estimator 120 can extract a first flat section from the low-frequency component acquired in Operation 710. According to one embodiment, the vehicle state estimator 120 can extract the first flat section from the low-frequency component using an STD filter. According to one embodiment, the vehicle state estimator 120 can extract, from the low-frequency component using an STD filter, the first flat section in which the current value is equal to or greater than a first specified current value and the change in current is maintained equal to or less than a first threshold for at least a specified time.

[0107] In OPERATION 720, the vehicle state estimation device 120 may estimate the first flat section extracted in OPERATION 715 as a charging section of the battery pack 110. Here, the charging section refers to a section in which power is supplied to the battery pack 110 from an external power source. According to an embodiment, the vehicle state estimation device 120 may estimate, as a fast charging section, a section in the first flat section extracted in OPERATION 715 in which the current value is equal to or greater than a second designated current value. Furthermore, the vehicle state estimation device 120 may estimate, as a slow charging section, a section in the first flat section extracted in OPERATION 715 in which the current value is less than the second designated current value. Here, the second designated current value may be greater than the first designated current value.

[0108] In ACT 725, the vehicle state estimator 120 can extract a second flat section from the current profile acquired in ACT 705. According to one embodiment, the vehicle state estimator 120 can extract the second flat section from the current profile using an STD filter. According to one embodiment, the vehicle state estimator 120 can extract the second flat section, in which the change in current is maintained below a second threshold for at least a specified time, using an STD filter.

[0109] In OPERATION 730, the vehicle state estimation device 120 may estimate at least a portion of the second flat section extracted in OPERATION 725 as a stop section of the vehicle 100. According to one embodiment, the vehicle state estimation device 120 may estimate, within the second flat section, a section in which the current value is equal to or less than a third specified value as a stop section of the vehicle 100. For example, the third specified value may be 0 A (ampere). In this case, the vehicle state estimation device 120 may estimate, within the second flat section, a section in which the current value is 0 A and / or a section in which the current value is a negative number as a stop section of the vehicle 100. Here, a section in which the current value is a negative number may refer to a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 discharges.

[0110] In operation 735, the vehicle state estimation device 120 can extract a first section from the current profile obtained in operation 705, excluding the first flat section extracted in operation 715 and the second flat section extracted in operation 725.

[0111] In OPERATION 740, the vehicle state estimation device 120 may estimate at least a portion of the first section as a driving section or a regenerative braking section based on the current value of the first section extracted in OPERATION 735. According to one embodiment, the vehicle state estimation device 120 may estimate a second section of the first section, in which the current value is a positive number, as a regenerative braking section. Furthermore, the vehicle state estimation device 120 may estimate a third section of the first section, in which the current value is a negative number, as a driving section. Here, the section in which the current value is a positive number may mean a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is charged, and the section in which the current value is a negative number may mean a section in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is discharged.

[0112] 8 is a diagram showing a screen provided by a display of a vehicle state estimation device according to an embodiment. FIG. 8 will be described using the configuration of FIG.

[0113] The vehicle state estimation device 120 can display the first screen 810, the second screen 820, and / or the third screen 830 according to Fig. 8 on the display 130 of the vehicle 100 and / or the display of an external electronic device. According to one embodiment, the vehicle state estimation device 120 can display the first screen 810, the second screen 820, and / or the third screen 830 based on the state of the vehicle 100 estimated by the operations of Fig. 3, Fig. 5, and / or Fig. 7.

[0114] The first screen 810 may include travel history information by date. The travel history information by date may include information regarding travel distance, travel time, and travel speed.

[0115] The second screen 820 may include charging record information for the current month. The charging record information for the current month may include information regarding the total number of charges, the number of fast charges, the number of slow charges, the difference from the previous month, and the ratio of the number of fast charges to the number of slow charges.

[0116] The third screen 830 may include current month driving history information, which may include information on the most recent driving distance, cumulative driving distance, most recent driving time, cumulative driving time, recent electricity consumption, and average electricity consumption.

[0117] As used above, terms such as "comprise," "constitute," and "have," unless otherwise specified, mean that the relevant element can be present within the term, and should be interpreted as including other elements rather than excluding other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments disclosed herein belong, unless otherwise defined. Commonly used terms, such as dictionary-defined terms, should be interpreted in a manner consistent with the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

Claims

1. In a vehicle state estimation device, a current sensor; and a processor; The processor: obtaining a current profile of a battery pack of the vehicle using the current sensor; extracting low-frequency components below a specified frequency from the current profile; A vehicle state estimation device configured to estimate, in the low-frequency component, a first flat section in which the current value is equal to or greater than a first specified current value and the change in current is maintained below a first threshold for a specified time or more, as a charging section of the battery pack.

2. The charging section includes a fast charging section and / or a slow charging section, The processor: The vehicle state estimation device according to claim 1 , configured to estimate at least a portion of the first flat section as the fast charge section or the slow charge section based on a current value in the first flat section.

3. The processor: A section in which the current value is equal to or greater than a second designated current value is estimated as the fast charging section within the first flat section; The vehicle state estimation device according to claim 2 , wherein the device is configured to estimate, as the slow charge section, a section of the first flat section in which the current value is less than the second specified current value.

4. The processor:

2. The vehicle state estimation device according to claim 1, wherein at least a portion of a second flat section in the current profile, in which the change in the current is maintained below a second threshold for a specified time or more, is estimated as a stopped section of the vehicle.

5. The processor: The vehicle state estimation device according to claim 4 , wherein the vehicle state estimation device is configured to estimate, as the stop section, a section in which a current value is equal to or less than 0 A (ampere) in the second flat section.

6. The processor: extracting a first section from the current profile excluding the first flat section and a second flat section in which the change in the current is maintained at or below a second threshold for a specified time or more; The vehicle state estimation device according to claim 1 , configured to estimate at least a part of the first section as a driving section or a regenerative braking section of the vehicle based on a current value in the first section.

7. The processor: A second section in which the current value is a positive number is estimated as the regenerative braking section, The vehicle state estimation device according to claim 6 , configured to estimate, as the traveling section, a third section of the first section in which the current value is a negative number.

8. The processor: acquiring parameters relating to the vehicle state estimation; The vehicle state estimation device according to claim 1 , configured to additionally correct the state of the vehicle based on the parameter.

9. The vehicle state estimation device according to claim 8 , wherein the parameters include information about the traveling speed of the vehicle.

10. The processor: The vehicle state estimation device according to claim 1 , configured to display information about the vehicle state on a display of the vehicle.

11. The processor: configured to transmit data including information regarding the state of the vehicle to an external electronic device using a communications circuit; 2. The vehicle state estimation device according to claim 1, wherein the data includes at least one instruction for causing the external electronic device to output, via a user interface, a specified alarm containing information regarding the state of the vehicle.

12. 1. A vehicle state estimation method, comprising: obtaining a current profile of a battery pack of the vehicle; extracting low-frequency components below a specified frequency from the current profile; and A vehicle state estimation method including an operation of estimating, in the low-frequency component, a first flat section in which the current value is equal to or greater than a first specified current value and the change in current is maintained below a first threshold for a specified time or more, as a charging section of the battery pack.

13. The charging section includes a fast charging section and / or a slow charging section, The method for estimating a state of a vehicle according to claim 12 , further comprising estimating at least a portion of the first flat section as the fast charge section or the slow charge section based on a current value in the first flat section.

14. 13. The vehicle state estimation method according to claim 12, further comprising an operation of estimating, in the current profile, at least a portion of a second flat section in which the change in current is maintained below a second threshold for a specified time or more, as a stopped section of the vehicle.

15. extracting a first section from the current profile, excluding the first flat section and the second flat section in which the change in current is maintained below a second threshold for a specified time or more; and The vehicle state estimation method according to claim 14 , further comprising estimating at least a portion of the first section as a driving section or a regenerative braking section of the vehicle based on a current value in the first section.

16. obtaining parameters related to a state estimation of the vehicle; and The method for estimating a state of a vehicle according to claim 12, further comprising the operation of additionally correcting the state of the vehicle based on the parameter.

17. In a vehicle state estimation device, a current sensor; and a processor; The processor: obtaining a current profile of a battery pack of the vehicle using the current sensor; estimating a state of the vehicle based on the current profile; A vehicle state estimation device configured to display information about the estimated state by an external electronic device.

18. The information includes travel history information by date, The vehicle state estimation device according to claim 17 , wherein the date-specific driving history information includes information relating to a driving time, a driving distance during the driving time, and a driving speed during the driving time.

19. The information includes current month charging record information, 18. The vehicle state estimation device according to claim 17, wherein the current month charging record information includes information regarding the total number of charges, the number of fast charges, the number of slow charges, a difference from the previous month, and a ratio of the number of fast charges to the number of slow charges.

20. The information includes current month driving history information, The vehicle state estimation device according to claim 17 , wherein the current month driving history information includes information on a recent driving distance, a cumulative driving distance, a recent driving time, a cumulative driving time, a recent electricity consumption, and an average electricity consumption.

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