Vehicle state estimation apparatus and operating method thereof

Abstract

An apparatus for estimating a state of a vehicle according to an embodiment disclosed in the present document may include a current sensor and a processor configured to obtain a current curve of a battery pack of the vehicle via the current sensor, extract a low frequency component equal to or lower than a specified frequency from the current curve, and estimate a state of the vehicle based on the extracted low frequency component. And estimating, as a charging section of the battery pack, a first flat section of the low-frequency component in which a current value is equal to or greater than a first specified current value and a current change is maintained at a first threshold value or lower for a specified time period or longer.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2022-0118197 filed on Sep. 19, 2022, which is hereby incorporated by reference in its entirety for all purposes. Technical Field

[0004] The embodiments disclosed in this document relate to a vehicle state estimation apparatus and an operating method thereof. Background Art

[0005] Recently, research and development of secondary batteries have been actively carried out. Here, secondary batteries are rechargeable batteries, and include all conventional Ni / Cd batteries, Ni / MH batteries and recent lithium-ion batteries. Among secondary batteries, lithium-ion batteries have the advantage that energy density is much higher than conventional Ni / Cd batteries and Ni / MH batteries. In addition, lithium-ion batteries can be made small and light enough to be used as power sources for mobile devices, and recently their scope of use has been expanded to power sources for electric vehicles, and they have attracted much attention as the next generation of energy storage media.

[0006] When the battery is discharged, or even when the battery is recharged, the electric vehicle can be in a driving state or a stationary state. That is, since whether the electric vehicle is in a driving state does not directly match whether the battery is being charged or discharged, various signals must be collected to estimate the state of the electric vehicle. Summary of the invention

[0007] Technical issues

[0008] However, since the type and resolution of signals that can be collected differ according to vehicles, different methods for estimating the vehicle state must be applied according to situations, which incurs a lot of cost and time.

[0009] An object of the embodiments disclosed in this document is to provide a vehicle state estimation apparatus capable of estimating a vehicle state and an operation method thereof.

[0010] An object of the embodiment disclosed in this document is to provide a vehicle state estimation apparatus capable of estimating a vehicle state based on current data of a battery pack and an operation method thereof.

[0011] An object of the embodiments disclosed in this document is to provide a vehicle state estimation apparatus capable of correcting a vehicle state additionally based on vehicle speed data, and an operating method thereof.

[0012] The technical purposes of the embodiments disclosed in this document are not limited to the above contents, and other purposes not described herein will be clearly understood by those skilled in the art from the following description.

[0013] Technical Solution

[0014] A vehicle state estimation device according to an embodiment disclosed in this document includes: a current sensor; and a processor, wherein the processor can be configured to obtain a current curve of a battery pack of a vehicle via the current sensor, extract a low-frequency component of a predetermined frequency or lower from the current curve, and estimate a first flat section in the low-frequency component in which a current value is equal to or greater than a first predetermined current value and a current change remains below a first threshold within a predetermined time period as a charging period of the battery pack.

[0015] According to an embodiment disclosed in this document, the charging period may include a fast charging period and / or a slow charging period, and the processor may be configured to estimate at least a portion of the first flat section as the fast charging period or the slow charging period based on the current value of the first flat section.

[0016] According to an embodiment disclosed in the present document, the processor may be configured to estimate a segment of the first flat segment in which the current value is equal to or greater than a second predetermined current value as the fast charging period, and to estimate a segment of the first flat segment in which the current value is less than the second predetermined current value as the slow charging period.

[0017] According to an embodiment disclosed in this document, the processor may be configured to estimate at least a portion of a second flat section in the current curve in which a current variation is equal to or less than a second threshold value for a predetermined period of time as a stop period of the vehicle.

[0018] According to an embodiment disclosed in this document, the processor may be configured to estimate a section in which the current value is equal to or less than 0 A (ampere) among the second flat section as the stop period.

[0019] According to an embodiment disclosed in this document, the processor may be configured to extract a first section from the current curve other than the first flat section and a second flat section in which a current variation remains less than or equal to a second threshold value for a predetermined period of time, and estimate at least a portion of the first section as a driving period or a regenerative braking period of the vehicle based on a current value of the first section.

[0020] According to an embodiment disclosed in this document, the processor may be configured to estimate a second section among the first sections in which the current value is positive as the regenerative braking period, and to estimate a third section among the first sections in which the current value is negative as the driving period.

[0021] According to an embodiment disclosed in this document, the processor may be configured to obtain parameters related to the estimation of the state of the vehicle and to correct the state of the vehicle additionally based on the parameters.

[0022] According to an embodiment disclosed in this document, the parameter may include driving speed information of the vehicle.

[0023] The vehicle state estimation device according to the embodiment disclosed in this document includes a display, wherein the processor may be configured to display information related to the state of the vehicle through the display.

[0024] In the vehicle state estimation device according to the embodiment disclosed in this document, the processor can be configured to send data including information related to the state of the vehicle to an external electronic device by using a communication circuit, and the data may include at least one instruction causing the external electronic device to output a predetermined alarm including information related to the state of the vehicle through a user interface.

[0025] A vehicle state estimation method according to an embodiment disclosed in the present document may include the following steps: obtaining a current curve of a battery pack of a vehicle; extracting a low-frequency component of a predetermined frequency or lower from the current curve; and estimating a first flat section in the low-frequency component in which the current value is equal to or greater than a first predetermined current value and the current change remains below a first threshold within a predetermined time period as a charging period of the battery pack.

[0026] According to an embodiment disclosed in this document, the charging period may include a fast charging period and / or a slow charging period, and the step of estimating the first flat section may include estimating at least a portion of the first flat section as the fast charging period or the slow charging period based on the current value of the first flat section.

[0027] The vehicle state estimation method according to the embodiment disclosed in this document may include the step of estimating at least a portion of a second flat section in the current curve in which a current variation is equal to or less than a second threshold value for a predetermined period of time as a stop period of the vehicle.

[0028] The vehicle state estimation method according to the embodiment disclosed in this document may include the following steps: extracting a first section from the current curve except the first flat section and a second flat section in which the current change remains less than or equal to a second threshold value within a predetermined time period, and estimating at least a portion of the first section as a driving period or a regenerative braking period of the vehicle based on the current value of the first section.

[0029] The vehicle state estimation method according to the embodiment disclosed in this document may include the steps of acquiring parameters related to the state estimation of the vehicle and additionally correcting the state of the vehicle based on the parameters.

[0030] Beneficial Effects

[0031] According to the embodiments disclosed in this document, the vehicle state can be reliably estimated based on the current data of the battery pack.

[0032] According to the embodiments disclosed in this document, the accuracy of estimating the vehicle state can be improved by correcting the vehicle state additionally based on the vehicle's speed data.

[0033] In addition, various effects confirmed directly or indirectly by this document can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a block diagram illustrating a vehicle including a vehicle state estimation apparatus according to an embodiment;

[0035] Figure 2 is a flowchart illustrating the operation of the vehicle state estimation apparatus according to the embodiment;

[0036] Figure 3 is a flowchart illustrating the operation of the vehicle state estimation apparatus according to the embodiment;

[0037] Figure 4 is a diagram illustrating an example of estimating a charging period of a battery pack by a vehicle state estimation apparatus according to an embodiment;

[0038] Figure 5 is a flowchart illustrating the operation of the vehicle state estimation apparatus according to the embodiment;

[0039] Figure 6 is a diagram illustrating an example of estimating a stop period of a vehicle by a vehicle state estimation apparatus according to an embodiment;

[0040] Figure 7 is a flowchart illustrating the operation of the vehicle state estimation apparatus according to the embodiment;

[0041] Figure 8is a diagram illustrating a screen provided via a display by the vehicle state estimation apparatus according to the embodiment. DETAILED DESCRIPTION

[0042] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, this description is not intended to limit the present invention to a specific embodiment, and it should be construed to include various modifications, equivalents and / or alternatives of the embodiments described herein.

[0043] The various embodiments disclosed in this document and the terms used herein are not intended to limit the technical features described in this document to specific embodiments, and the disclosure should be interpreted as including various modified forms, equivalent forms and / or alternative forms of the corresponding embodiments. In conjunction with the description of the drawings, similar reference numerals may be used for similar or related elements. Nouns corresponding to items in the singular form may include one item or multiple items, unless the relevant context clearly stipulates otherwise.

[0044] In this document, each of phrases 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", and "at least one of A, B or C" may include any one of the items listed together in the corresponding phrase or any possible combination thereof. Terms such as "first", "second", "first", "second", "A", "B", "(a)" or "(b)" may be used only to distinguish the component from other components and do not limit the corresponding component in other aspects (e.g., importance or order) unless otherwise specifically stated.

[0045] In this document, when a (e.g., first) component is referred to as being “connected,” “coupled,” or “accessed” to another (e.g., second) component, with or without the term “functionally” or “communicatively,” this means that the component can be connected to the other component directly (e.g., wired), wirelessly, or via a third component.

[0046] According to an embodiment, the method according to various embodiments disclosed in the document may be provided in the form of a computer program product. The computer program product may be traded between a seller and a buyer as a commodity. The computer program product may be distributed between two user devices in the form of a machine-readable storage medium (e.g., a compact disk read-only memory (CD-ROM)) or online (e.g., downloaded or uploaded) or directly via an application store. In the case of online distribution, at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a memory of a manufacturer's server, an application store server, or a relay server.

[0047] According to various embodiments, each component (e.g., module or program) in the above-mentioned components can include a single object or multiple objects, and some of the multiple objects can be separately arranged in other components. According to various embodiments, one or more components or operations among the above-mentioned components can be omitted, or one or more other components or operations can be added. Alternatively or additionally, multiple components (e.g., module or program) can be integrated into a single component. In this case, the integrated component can perform one or more functions of each of the multiple components identically or similarly to the functions performed by the corresponding components in the multiple components before integration. According to various embodiments, the operations performed by modules, programs or other components are performed sequentially, in parallel, iteratively or heuristically, or one or more of the operations are performed in different orders, omitted, or one or more other operations can be added.

[0048] Figure 1 is a block diagram illustrating a vehicle including a vehicle state estimation apparatus according to an embodiment.

[0049] Reference Figure 1 , the vehicle 100 may include a battery pack 110, a vehicle state estimation device 120, a display 130, and / or a communication circuit 140. According to an embodiment, the vehicle 100 may be an electric vehicle using electric energy. According to an embodiment, the vehicle 100 may be omitted. Figure 1 The vehicle 100 is configured by at least one of the components of the embodiment or by adding one or more other components. According to an embodiment, some components may be implemented as a single integrated circuit.

[0050] 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. In addition, the battery pack 110 may include a battery management system (BMS) that performs functions of measuring electrical characteristic values ​​such as current or voltage, controlling charge / discharge, controlling voltage balancing, estimating state of charge (SOC), and estimating state of health (SOH).

[0051] The vehicle state estimation device 120 may include a current sensor 121 and / or a processor 123 .

[0052] The current sensor 121 may be electrically connected to the battery pack 110. According to an embodiment, the current sensor 121 may measure the current of the battery pack 110. The current sensor 121 may transmit a current profile of the battery pack 110 to the processor 123 based on the measured current value.

[0053] According to an 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 flows. Whenever the measurement control signal is received from the processor 123, the current sensor 121 may measure the current of the battery pack 110.

[0054] The processor 123 may be electrically connected to the current sensor 121, the display 130, and / or the communication circuit 140. According to an embodiment, the processor 123 may execute software to control at least one other component connected to the processor 123, and may perform various data processing or operations. According to an embodiment, the processor 123 may control the overall operation of the vehicle state estimation device 120 by controlling at least one other component connected to the processor 123. The processor 123 may include at least one of a processing device such as an application specific integrated circuit (ASIC), a digital signal processor (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a microcontroller, or a microprocessor.

[0055] According to an embodiment, the processor 123 may obtain a current curve of the battery pack 110. According to an embodiment, the processor 123 may obtain a current curve of the battery pack 110 via the current sensor 121. For example, the processor 123 may obtain the current curve by measuring a current value of the battery pack 110 within a predetermined period of time via the current sensor 121.

[0056] According to an embodiment, the processor 123 may estimate the vehicle state based on the obtained current curve.

[0057] According to an embodiment, the processor 123 may extract a low frequency component of a predetermined frequency or lower from the obtained current curve. According to an embodiment, the processor 123 may extract a low frequency component of a predetermined frequency or lower using a low pass filter (LPF).

[0058] According to an embodiment, the processor 123 may extract a first flat section from the obtained low-frequency component. According to an embodiment, the processor 123 may extract a first flat section from the low-frequency component using a standard deviation (STD) filter. Here, the STD filter may refer to a filter that extracts a section in a current curve in which a standard deviation is equal to or less than a specified level. According to an embodiment, the processor 123 uses the STD filter to extract a first flat section in a low-frequency component in which a current value is equal to or greater than a first predetermined current value and a current change remains below a first threshold value within a predetermined time period.

[0059] According to an embodiment, the processor 123 may estimate the extracted first flat section as a charging period of the battery pack 110. Here, the charging period may mean a period in which the battery pack 110 receives power from an external power source. According to an embodiment, the processor 123 may estimate a section in which the current value is equal to or greater than the second predetermined current value among the extracted first flat sections as a fast charging period. The processor 123 may also estimate a section in which the current value among the extracted first flat sections is less than the second predetermined current value as a slow charging period. Here, the second predetermined current value may be greater than the first predetermined current value.

[0060] According to an embodiment, the processor 123 may extract the second flat section from the obtained current curve. According to an embodiment, the processor 123 may extract the second flat section from the current curve using an STD filter. According to an embodiment, the processor 123 may extract the second flat section in which the current variation remains less than or equal to the second threshold value within a predetermined period of time using an STD filter.

[0061] According to an embodiment, the processor 123 may estimate at least part of the extracted second flat section as a stop period of the vehicle 100. According to an embodiment, the processor 123 may estimate a section among the second flat section in which the current value is equal to or less than a third predetermined value as a stop period of the vehicle 100. For example, the third predetermined value may be 0A (ampere). In this case, the processor 123 may estimate a section among the second flat section in which the current value is 0A and / or a section in which the current value is negative as a stop period of the vehicle 100. Here, the section in which the current value is negative may mean a period in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is discharged.

[0062] According to an embodiment, the processor 123 may extract a first section other than the first flat section and the second flat section in the current curve. The processor 123 may estimate at least part of the first section as a driving period or a regenerative braking period based on the current value of the first section. According to an embodiment, the processor 123 may estimate the second section in which the current value is a positive number among the first section as a regenerative braking period. In addition, the processor 123 may estimate the third section in which the current value is a negative number among the first section as a driving period. Here, the section in which the current value is a positive number may mean a period in which the current of the battery pack 110 flows in the direction in which the battery pack 110 is charged, and the section in which the current value is a negative number may mean a period in which the current of the battery pack 110 flows in the direction in which the battery pack 110 is discharged.

[0063] According to an embodiment, the processor 123 may acquire parameters related to vehicle state estimation. According to an embodiment, the parameters related to vehicle state estimation may include driving speed information of the vehicle 100. For example, the driving speed information may include driving speed information of the vehicle 100 within a time corresponding to the current curve.

[0064] According to an embodiment, the processor 123 may further correct the state of the vehicle 100 based on the acquired parameters. According to an embodiment, the processor 123 may correct only the section in which the speed of the vehicle 100 is a predetermined value among the estimated charging period as the charging period. For example, the predetermined value may be set to 0. According to an embodiment, the processor 123 may correct only the section in which the speed of the vehicle 100 is a predetermined value among the estimated stop period as the stop period. For example, the predetermined value may be set to 0km / h. According to an embodiment, the processor 123 may correct only the section in which the speed of the vehicle 100 is equal to or greater than the predetermined value among the estimated driving period as the driving period. For example, the predetermined value may be set to 1km / h.

[0065] According to an embodiment, the processor 123 may provide the user with vehicle state information. According to an embodiment, the processor 123 may provide the user with vehicle state information estimated through the above operation and / or vehicle state information corrected through the above operation.

[0066] According to one embodiment, the processor 123 may display the vehicle status information through the display 130. According to an embodiment, the processor 123 may send the vehicle status information to the external electronic device via the communication circuit 140. The external electronic device may display the received vehicle status information through the display of the external electronic device.

[0067] The display 130 may be provided inside the vehicle 100. For example, the 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. The display 130 may display a user interface capable of manipulating and outputting various functions that may be performed in the vehicle 100. According to an embodiment, the display 130 may display a screen including vehicle status information received from the processor 123.

[0068] The communication circuit 140 may send and receive data to and from an external electronic device and / or an external server in a wired or wireless manner. According to an embodiment, the communication circuit 140 may send data including vehicle status information received from the processor 123 to the external electronic device and / or the external server. According to an embodiment, the data may include an instruction to cause the external electronic device to output a specified alarm through a user interface (e.g., a display or a speaker).

[0069] Figure 2 is a flowchart illustrating the operation of the vehicle state estimation device according to the embodiment. Figure 1 to describe the components Figure 2 .

[0070] Figure 2 The embodiment shown in FIG. 1 is only one embodiment, and the order of steps according to various embodiments of the present invention may be different. Figure 2 The order shown in is different, and Figure 2 Some of the steps shown may be omitted, changed in order, or combined.

[0071] According to one embodiment, it can be understood that operations 205 to 225 are performed by the processor 123 of the vehicle state estimation device 120 .

[0072] refer to Figure 2 In operation 205, the vehicle state estimation device 120 may obtain a current curve of the battery pack 110. According to an embodiment, the vehicle state estimation device 120 may obtain the current curve of the battery pack 110 via the current sensor 121. For example, the vehicle state estimation device 120 may obtain the current curve by measuring the current value of the battery pack 110 within a predetermined time period via the current sensor 121.

[0073] In operation 210 , the vehicle state estimation apparatus 120 may estimate the vehicle state based on the current curve obtained in operation 205 .

[0074] According to an embodiment, the vehicle state estimation device 120 may extract a low-frequency component of a predetermined frequency or lower from the current curve. The vehicle state estimation device 120 may estimate a first flat section in the low-frequency component in which the current value is equal to or greater than a first predetermined current value and the current change remains below a first threshold value for a predetermined period of time as a charging section.

[0075] According to an embodiment, the vehicle state estimation apparatus 120 may estimate at least a portion of a second flat section in the current curve in which a current variation remains less than or equal to a second threshold value for a predetermined period of time as a stop period of the vehicle 100 .

[0076] According to an embodiment, the vehicle state estimation apparatus 120 may extract the first section except the first flat section and the second flat section. The vehicle state estimation apparatus 120 may estimate at least part of the first section as a driving period or a regenerative braking period of the vehicle based on the current value of the first section.

[0077] Later, you can refer to Figures 3 to 7The operation of the vehicle state estimating apparatus 120 to estimate the vehicle state based on the current curve will be described in detail.

[0078] In operation 215, the vehicle state estimation device 120 may acquire parameters related to vehicle state estimation. According to an embodiment, the parameters related to vehicle state estimation may include driving speed information of the vehicle 100. For example, the driving speed information may include driving speed information of the vehicle 100 in a time period corresponding to the current curve obtained in operation 205.

[0079] In operation 220 , the vehicle state estimation apparatus 120 may correct the state of the vehicle 100 additionally based on the parameters acquired in operation 215 .

[0080] According to an embodiment, the vehicle state estimation apparatus 120 may correct only a section in which the speed of the vehicle 100 is a predetermined value among the charging period estimated in operation 210 as the charging period. For example, the predetermined value may be set to 0.

[0081] According to an embodiment, the vehicle state estimation apparatus 120 may correct only a section in which the speed of the vehicle 100 is a predetermined value among the estimated stop period as the stop period. For example, the predetermined value may be set to 0 km / h.

[0082] According to an embodiment, the vehicle state estimation device 120 may correct only a section in which the speed of the vehicle 100 is equal to or greater than a predetermined value among the estimated travel period as the travel period. For example, the predetermined value may be set to 1 km / h.

[0083] In operation 225 , the vehicle state estimation apparatus 120 may provide the user with parameters related to the vehicle state. According to an embodiment, the vehicle state estimation apparatus 120 may provide the user with information related to the vehicle state estimated in operation 210 and / or information related to the vehicle state corrected in operation 220 .

[0084] According to an embodiment, the vehicle state estimation apparatus 120 may display information related to the vehicle state through the display 130. According to an embodiment, the vehicle state estimation apparatus 120 may send the vehicle state information to the external electronic device via the communication circuit 140. The external electronic device may display the received vehicle state information through the display of the external electronic device.

[0085] Later, you can refer to Figure 8 The vehicle status information provided to the user in operation 225 is described in detail.

[0086] Figure 3 is a flowchart illustrating the operation of the vehicle state estimation device according to the embodiment. Figure 1to describe the components Figure 3 .

[0087] Figure 3 The embodiment shown in FIG. 1 is only one embodiment, and the order of steps according to various embodiments of the present invention may be different. Figure 3 The order shown in is different, and Figure 3 Some of the steps shown may be omitted, changed in order, or combined.

[0088] According to one embodiment, it can be understood that operations 305 to 320 are performed by the processor 123 of the vehicle state estimation device 120 .

[0089] refer to Figure 3 In operation 305, the vehicle state estimation device 120 may obtain a current curve of the battery pack 110. According to an embodiment, the vehicle state estimation device 120 may obtain the current curve of the battery pack 110 via the current sensor 121. For example, the vehicle state estimation device 120 may obtain the current curve by measuring the current value of the battery pack 110 within a predetermined time period via the current sensor 121.

[0090] In operation 310, the vehicle state estimation apparatus 120 may extract a low frequency component of a predetermined frequency or less from the current curve obtained in operation 305. According to an embodiment, the vehicle state estimation apparatus 120 may extract a low frequency component of a predetermined frequency or less from the current curve using an LPF.

[0091] In operation 315, the vehicle state estimation apparatus 120 may extract a flat section from the low frequency component obtained in operation 310. According to an embodiment, the vehicle state estimation apparatus 120 may extract the flat section from the low frequency component using an STD filter. According to an embodiment, the vehicle state estimation apparatus 120 may extract a flat section in which a current value is equal to or greater than a first predetermined current value and a current variation remains below a first threshold value in a predetermined period of time in the low frequency component using an STD filter.

[0092] Later, you can refer to Figure 4 The operation 310 of extracting the low frequency component from the current curve and the operation 315 of extracting the flat section from the extracted low frequency component will be described in detail.

[0093] In operation 320, the vehicle state estimation device 120 may estimate the flat section extracted in operation 315 as a charging period of the battery pack 110. Here, the charging period may mean a period in which the battery pack 110 receives power from an external power source. According to an embodiment, the vehicle state estimation device 120 may estimate a section in which the current value is equal to or greater than the second predetermined current value among the flat sections extracted in operation 315 as a fast charging period. The vehicle state estimation device 120 may also estimate a section in which the current value is less than the second predetermined current value among the flat sections extracted in operation 315 as a slow charging period. Here, the second predetermined current value may be greater than the first predetermined current value.

[0094] When the battery pack 110 of the vehicle 100 is being charged, the current value of the battery pack 110 may be maintained as a current value in the charging direction for a predetermined period of time. Therefore, by extracting only the low-frequency component from the current curve in operation 310 and extracting the flat section from the extracted low-frequency component in operation 315, the charging period of the battery pack 110 may be reliably estimated.

[0095] Figure 4 is a diagram illustrating an example of estimating a charging period of a battery pack by a vehicle state estimation apparatus according to an embodiment. Figure 1 to describe the components Figure 4 .

[0096] Figure 4 The graph 400 may include a current curve and a low-frequency component of the battery pack 110. Here, the current curve may correspond to Figure 3 The current curve of the battery pack 110 obtained in operation 305 of FIG. 10A . In addition, the low-frequency component may correspond to Figure 3 In operation 310 , the low frequency components are extracted.

[0097] 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. Each of the first to fifth flat sections 411 to 415 may refer to a section in which a current value is equal to or greater than a first predetermined current value and a current variation is maintained below a first threshold value for a predetermined period of time.

[0098] According to an embodiment, each of the first to fifth flat sections 411 to 415 may correspond to Figure 3 In this case, the vehicle state estimation apparatus 120 may estimate each of the first to fifth flat sections 411 to 415 as a charging period of the battery pack 110 .

[0099] According to an embodiment, the entire current flat section 410 may correspond to Figure 3 In this case, the vehicle state estimation apparatus 120 may estimate the entire current flat section 410 as a charging period of the battery pack 110 .

[0100] According to an embodiment, the vehicle state estimation device 120 may estimate the segments among the first flat segment 411 to the fifth flat segment 415 in which the current value is equal to or greater than the second predetermined current value as a fast charging period. The vehicle state estimation device 120 may also estimate the segments among the first flat segment 411 to the fifth flat segment 415 in which the current value is less than the second predetermined current value as a slow charging period. Here, the second predetermined current value may be greater than the first predetermined current value. For example, the vehicle state estimation device 120 may estimate the first flat segment 411, the second flat segment 412, and the third flat segment 413 in which the current value is equal to or greater than the second predetermined current value as a fast charging period, and may estimate the fourth flat segment 414 and the fifth flat segment 415 in which the current value is less than the second predetermined current value as a slow charging period.

[0101] Figure 5 is a flowchart illustrating the operation of the vehicle state estimation device according to the embodiment. Figure 1 to describe the components Figure 5 .

[0102] Figure 5 The embodiment shown in FIG. 1 is only one embodiment, and the order of steps according to various embodiments of the present invention may be different. Figure 5 The order shown in is different, and Figure 5 Some of the steps shown may be omitted, changed in order, or combined.

[0103] According to one embodiment, it can be understood that operations 505 to 515 are performed by the processor 123 of the vehicle state estimation device 120 .

[0104] refer to Figure 5 In operation 505, the vehicle state estimation device 120 may obtain a current curve of the battery pack 110. According to an embodiment, the vehicle state estimation device 120 may obtain the current curve of the battery pack 110 via the current sensor 121. For example, the vehicle state estimation device 120 may obtain the current curve by measuring the current value of the battery pack 110 within a predetermined time period via the current sensor 121.

[0105] In operation 510, the vehicle state estimation apparatus 120 may extract a flat section from the current curve obtained in operation 505. According to an embodiment, the vehicle state estimation apparatus 120 may extract a flat section from the current curve using an STD filter. According to an embodiment, the vehicle state estimation apparatus 120 may extract a flat section in which a current variation remains less than or equal to a second threshold value for a predetermined period of time using an STD filter.

[0106] Later, you can refer to Figure 6 The operation of extracting the flat section from the current curve in operation 510 will be described in detail.

[0107] In operation 515, the vehicle state estimation device 120 may estimate at least part of the flat section extracted in operation 510 as a stop period of the vehicle 100. According to an embodiment, the vehicle state estimation device 120 may estimate a section among the flat sections in which the current value is equal to or less than a third predetermined value as a stop period of the vehicle 100. For example, the third predetermined value may be 0A (ampere). In this case, the vehicle state estimation device 120 may estimate a section among the flat sections in which the current value is 0A and / or a section in which the current value is negative as a stop period of the vehicle 100. Here, the section in which the current value is negative may mean a period in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is discharged.

[0108] When the vehicle 100 stops, the current value of the battery pack 110 may be maintained for a predetermined period of time. Therefore, by extracting the flat section from the current curve in operation 510, the stop period of the vehicle 100 may be reliably estimated.

[0109] Figure 6 is a diagram illustrating an example of estimating a stop period of a vehicle by a vehicle state estimation apparatus according to an embodiment. Figure 1 to describe the components Figure 6 .

[0110] Figure 6 The graph 600 of FIG. 600 may represent a current curve of the battery pack 110. Here, the current curve may correspond to Figure 5 The current curve of the battery pack 110 is obtained in operation 505.

[0111] The current curve may include at least one current flat section 601 to 607. Each of the at least one current flat section 601 to 607 may refer to a section in which a current variation remains less than or equal to a second threshold value for a predetermined period of time.

[0112] According to an embodiment, at least one current flat section 601 to 607 may correspond to Figure 5In this case, the vehicle state estimation apparatus 120 may estimate at least part of at least one current flat section 601 to 607 as a stop period of the vehicle 100. According to an embodiment, the vehicle state estimation apparatus 120 may estimate a section in which the current value is equal to or less than a third predetermined value among at least one current flat section 601 to 607 as a stop period of the vehicle 100. For example, the third predetermined value may be 0A (ampere).

[0113] Figure 7 is a flowchart illustrating the operation of the vehicle state estimation device according to the embodiment. Figure 1 to describe the components Figure 7 .

[0114] Figure 7 The embodiment shown in FIG. 1 is only one embodiment, and the order of steps according to various embodiments of the present invention may be different. Figure 7 The order shown in is different, and Figure 7 Some of the steps shown may be omitted, changed in order, or combined.

[0115] According to one embodiment, it can be understood that operations 705 to 740 are performed by the processor 123 of the vehicle state estimation device 120 .

[0116] refer to Figure 7 In operation 705, the vehicle state estimation device 120 may obtain a current curve of the battery pack 110. According to an embodiment, the vehicle state estimation device 120 may obtain the current curve of the battery pack 110 via the current sensor 121. For example, the vehicle state estimation device 120 may obtain the current curve by measuring the current value of the battery pack 110 within a predetermined time period via the current sensor 121.

[0117] In operation 710, the vehicle state estimation apparatus 120 may extract a low frequency component of a predetermined frequency or less from the current curve obtained in operation 705. According to an embodiment, the vehicle state estimation apparatus 120 may extract a low frequency component of a predetermined frequency or less from the current curve using an LPF.

[0118] In operation 715, the vehicle state estimation apparatus 120 may extract a first flat section from the low frequency component obtained in operation 710. According to an embodiment, the vehicle state estimation apparatus 120 may extract the first flat section from the low frequency component using an STD filter. According to an embodiment, the vehicle state estimation apparatus 120 extracts a first flat section in which a current value is equal to or greater than a first predetermined current value and a current variation remains below a first threshold value in the low frequency component using an STD filter.

[0119] In operation 720, the vehicle state estimation device 120 may estimate the first flat section extracted in operation 715 as a charging period of the battery pack 110. Here, the charging period may mean a period in which the battery pack 110 receives power from an external power source. According to an embodiment, the vehicle state estimation device 120 may estimate a section in which the current value is equal to or greater than the second predetermined current value among the first flat section extracted in operation 715 as a fast charging period. The vehicle state estimation device 120 may also estimate a section in which the current value is less than the second predetermined current value among the first flat section extracted in operation 715 as a slow charging period. Here, the second predetermined current value may be greater than the first predetermined current value.

[0120] In operation 725, the vehicle state estimation apparatus 120 may extract a second flat section from the current curve obtained in operation 705. According to an embodiment, the vehicle state estimation apparatus 120 may extract the second flat section from the current curve using an STD filter. According to an embodiment, the vehicle state estimation apparatus 120 may extract a second flat section in which a current variation remains less than or equal to a second threshold value for a predetermined period of time using an STD filter.

[0121] In operation 730, the vehicle state estimation device 120 may estimate at least part of the second flat section extracted in operation 725 as a stop period of the vehicle 100. According to an embodiment, the vehicle state estimation device 120 may estimate a section among the second flat section in which the current value is equal to or less than a third predetermined value as a stop period of the vehicle 100. For example, the third predetermined value may be 0A (ampere). In this case, the vehicle state estimation device 120 may estimate a section among the second flat section in which the current value is 0A and / or a section in which the current value is negative as a stop period of the vehicle 100. Here, the section in which the current value is negative may mean a period in which the current of the battery pack 110 flows in a direction in which the battery pack 110 is discharged.

[0122] In operation 735 , the vehicle state estimation apparatus 120 may extract a first section other than the first flat section extracted in operation 715 and the second flat section extracted in operation 725 in the current curve obtained in operation 705 .

[0123] In operation 740, the vehicle state estimation device 120 may estimate at least part of the first section as a driving period or a regenerative braking period based on the current value of the first section extracted in operation 735. According to an embodiment, the vehicle state estimation device 120 may estimate the second section among the first section in which the current value is a positive number as a regenerative braking period. The vehicle state estimation device 120 may also estimate the third section among the first section in which the current value is a negative number as a driving period. Here, the section in which the current value is a positive number may mean a period in which the current of the battery pack 110 flows in the direction in which the battery pack 110 is charged, and the section in which the current value is a negative number may mean a period in which the current of the battery pack 110 flows in the direction in which the battery pack 110 is discharged.

[0124] Figure 8 is a diagram illustrating a screen provided via a display by a vehicle state estimation device according to an embodiment. Figure 1 to describe the components Figure 8 .

[0125] The vehicle state estimation apparatus 120 may display the vehicle state through the display 130 of the vehicle 100 and / or the display of the external electronic device. Figure 8 The first screen 810, the second screen 820 and / or the third screen 830 shown in FIG. According to an embodiment, the vehicle state estimation device 120 may be based on the vehicle state estimation device 120. Figure 3 , Figure 5 and / or Figure 7 The first screen 810 , the second screen 820 , and the third screen 830 are displayed according to the state of the vehicle 100 estimated by the operation.

[0126] The first screen 810 may include driving history information by date. The daily driving history information may include information on driving distance, driving time, and driving speed.

[0127] The second screen 820 may include charging record information for the current month. The charging record information for the current month may include information on the total number of charging times, the number of fast charging times, the number of slow charging times, the difference from the previous month, and the ratio between the number of fast charging times and the number of slow charging times.

[0128] The third screen 830 may include driving history information of the current month. The driving history information of the current month may include information on the latest driving distance, cumulative driving distance, latest driving time, cumulative driving time, latest power efficiency, and average power efficiency.

[0129] In addition, the terms such as "including", "comprising" or "having" used above imply that corresponding components may exist unless otherwise specifically stated, and therefore they should be interpreted as being able to further include other components rather than excluding other components. Unless otherwise defined herein, all terms (including technical terms or scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. It should also be further understood that terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal meaning unless explicitly defined herein.

Claims

1. A vehicle state estimation device, the vehicle state estimation device comprising: Current sensor; as well as processor, The processor is configured to obtain a current curve of a battery pack of the vehicle via the current sensor, extract a low-frequency component of a predetermined frequency or lower from the current curve, and estimate a first flat section in the low-frequency component in which a current value is equal to or greater than a first predetermined current value and a current change remains equal to or less than a first threshold value for a predetermined time period or longer as a charging period of the battery pack.

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

3. The vehicle state estimation device according to claim 2, wherein: The processor is further configured to estimate a section among the first flat section in which a current value is equal to or greater than a second predetermined current value as the fast charging period, and to estimate a section among the first flat section in which a current value is less than the second predetermined current value as the slow charging period.

4. The vehicle state estimation device according to claim 1, wherein: The processor is further configured to estimate at least a portion of a second flat section in the current curve in which a current variation is equal to or less than a second threshold value for a predetermined period of time or longer as a stop period of the vehicle.

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

6. The vehicle state estimation device according to claim 1, wherein: The processor is also configured to extract a first section from the current curve except the first flat section and a second flat section in which a current variation remains less than or equal to a second threshold for a predetermined period of time or longer, and estimate at least a portion of the first section as a driving period or a regenerative braking period of the vehicle based on a current value of the first section.

7. The vehicle state estimation device according to claim 6, wherein: The processor is further configured to estimate a second section among the first sections in which the current value is a positive number as the regenerative braking period, and to estimate a third section among the first sections in which the current value is a negative number as the traveling period.

8. The vehicle state estimation device according to claim 1, wherein: The processor is further configured to obtain parameters related to the state estimation of the vehicle and to correct the state of the vehicle additionally based on the parameters.

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

10. The vehicle state estimation device according to claim 1, wherein The processor is also configured to display information related to the status of the vehicle via a display of the vehicle.

11. The vehicle state estimation device according to claim 1, wherein: The processor is also configured to send data including information related to the status of the vehicle to an external electronic device by using a communication circuit, and the data includes at least one instruction causing the external electronic device to output a predetermined alarm including the information related to the status of the vehicle through a user interface.

12. A vehicle state estimation method, the vehicle state estimation method comprising the following steps: Obtaining a current curve of a battery pack of a vehicle; extracting a low-frequency component of a predetermined frequency or lower from the current curve; as well as A first flat section in the low frequency component in which a current value is equal to or greater than a first predetermined current value and a current variation remains equal to or less than a first threshold value for a predetermined period of time or longer is estimated as a charging period of the battery pack.

13. The vehicle state estimation method according to claim 12, wherein: The charging period includes a fast charging period and / or a slow charging period, and the step of estimating the first flat section includes the step of estimating at least part of the first flat section as the fast charging period or the slow charging period based on a current value of the first flat section.

14. The vehicle state estimation method according to claim 12, further comprising the following steps: At least a portion of a second flat section in the current curve in which a current variation is equal to or less than a second threshold value for a predetermined period of time or longer is estimated as a stop period of the vehicle.

15. The vehicle state estimation method according to claim 14, further comprising the following steps: extracting, from the current curve, a first section other than the first flat section and a second flat section in which a current variation remains less than or equal to a second threshold value for a predetermined period of time or longer; as well as At least a portion of the first section is estimated as a running period or a regenerative braking period of the vehicle based on the current value of the first section.

16. The vehicle state estimation method according to claim 12, further comprising the following steps: Acquiring parameters related to the state estimation of the vehicle; as well as Additionally, a state of the vehicle is corrected based on the parameter.

17. A vehicle state estimation device, the vehicle state estimation device comprising: Current sensor; as well as processor, The processor is configured to obtain a current curve of a battery pack of a vehicle via the current sensor, estimate a state of the vehicle based on the current curve, and display information related to the estimated state via an external electronic device.

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

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

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

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