Battery state estimation device, battery state estimation system, battery state estimation method, and program

Abstract

A battery state estimation device (10) comprises a vehicle data acquisition unit (110), a temperature data acquisition unit (120), and an estimation unit (140). The vehicle data acquisition unit (110) acquires vehicle stop position information and battery information. The vehicle stop position information indicates a vehicle stop position of a vehicle mounted with a battery. The battery information indicates a state of the battery at the position in which the vehicle has stopped. The temperature data acquisition unit (120) acquires temperature data that is data related to the temperature at the vehicle stop position, by using vehicle stop position information. The estimation unit (140) estimates the state of the battery after the vehicle has stopped, by using the battery information and the temperature data.

Description

Technical Field

[0005] , , , , , , , , ,

[0001] The present invention relates to a battery state estimation device, a battery state estimation system, a battery state estimation method, and a recording medium.

Background Art

[0002] Vehicles often have a battery installed. This battery is used, for example, as a power source when starting the engine. Also, in an electric vehicle, this battery is used as a power source for the motor. Therefore, when the remaining amount of the battery decreases, sufficient output cannot be obtained from the battery, and as a result, the vehicle may not operate.

[0003] In contrast, for example, Patent Document 1 describes the following battery monitoring device. This battery monitoring device calculates the voltage drop from the output voltage of the battery detected by a voltage sensor when the engine is started, and also monitors the state of the starter for engine starting based on the calculated voltage drop. Then, this battery monitoring device sets the automatic start start voltage V at which the engine should be started and charging should be started in order to keep the battery in a state where the engine can be started, based on the voltage drop. Also, Patent Document 1 describes that the accuracy can be improved by considering the influence of the environment such as the air temperature when calculating the voltage drop.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0006] One example of the object of the present invention is to provide a battery state estimation device, a battery state estimation system, a battery state estimation method, and a recording medium that can estimate the state of a battery using temperature data and suppress an increase in the amount of work required by the user when acquiring temperature data, in view of the above-mentioned problems. [Means for solving the problem]

[0007] According to one aspect of the present invention, a vehicle data acquisition means acquires parking position information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the state of the battery at the parking position, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, A battery state estimation device is provided that includes the following.

[0008] According to one aspect of the present invention, a transmitting device mounted on a vehicle, Battery state estimation device, Equipped with, The aforementioned vehicle is equipped with a battery, The transmitting device transmits to the battery state estimation device the stopping position information indicating the stopping position of the vehicle, and the battery state information indicating the state of the battery at the stopping position. The aforementioned battery state estimation device is A vehicle data acquisition means for acquiring the aforementioned parking position information and the aforementioned battery information, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, A battery state estimation system is provided that includes the following features.

[0009] According to one aspect of the present invention, a computer The system acquires parking location information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the status of the battery at the parking location. Using the aforementioned stopping position information, temperature data, which is data relating to the temperature at the stopping position, A battery state estimation method is provided, which estimates the state of the battery after the vehicle has stopped, using the aforementioned battery information and temperature data.

[0010] According to one aspect of the present invention, a computer, A vehicle data acquisition function that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the status of the battery at the parking position, A temperature data acquisition function that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation function that estimates the state of the battery after the vehicle has stopped, using the battery information and temperature data, A computer-readable recording medium is provided that stores a program that gives the device a certain property. [Effects of the Invention]

[0011] According to one aspect of the present invention, a battery state estimation device, a battery state estimation system, a battery state estimation method, and a recording medium can be provided that can estimate the state of a battery using temperature data and suppress an increase in the amount of work required by the user when acquiring temperature data. [Brief explanation of the drawing]

[0012] [Figure 1] This figure shows an overview of the battery state estimation device according to the first embodiment. [Figure 2] This figure shows an example of the operating environment for the battery state estimation device shown in Figure 1. [Figure 3] This is a diagram showing an example of the usage environment of the battery state estimation device. [Figure 4] This is a diagram showing an example of the information stored in the history storage unit. [Figure 5] This is a diagram schematically showing an example of the estimation information by the estimation unit. [Figure 6] This is a diagram showing an example of the hardware configuration of the battery state estimation device. [Figure 7] This is a flowchart showing a first example of the process performed by the battery state estimation device. [Figure 8] This is a flowchart showing a detailed example of step S20 in FIG. 7. [Figure 9] This is a flowchart showing a second example of the process performed by the battery state estimation device. [Figure 10] This is a diagram showing a modified example of the process shown in FIG. 7. [Figure 11] This is a diagram showing the functional configuration of the battery state estimation device according to the second embodiment. [Figure 12] An example of the information output by the output unit is shown. [Figure 13] This is a diagram showing the functional configuration of the battery state estimation device according to the third embodiment.

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and the description will be omitted as appropriate.

[0014] (First Embodiment) Figure 1 is a diagram showing an overview of a battery state estimation device 10 according to an embodiment. The battery state estimation device 10 comprises a vehicle data acquisition unit 110, a temperature data acquisition unit 120, and an estimation unit 140. The vehicle data acquisition unit 110 acquires parking position information and battery information. The parking position information indicates the parking position of the vehicle equipped with the battery. An example of parking position information is latitude and longitude information, but it is not limited to this. The battery information indicates the state of the battery at the parking position. The battery information includes, for example, at least one of SOC and output voltage, but it is not limited to this. The temperature data acquisition unit 120 uses the parking position information to acquire temperature data, which is data relating to the temperature at the parking position. The estimation unit 140 uses the battery information and temperature data to estimate the state of the battery after the vehicle has stopped. The estimated battery state includes, but is not limited to, at least one of SOC and output voltage.

[0015] According to the battery state estimation device 10, the estimation unit 140 estimates the battery state after the vehicle has stopped using battery information and temperature data. Therefore, the user can be aware of whether or not the battery level may be low while the vehicle is stopped. In addition, the temperature data acquisition unit 120 acquires temperature data using the stopping position information. Therefore, the user does not need to do any work when acquiring temperature-related data.

[0016] Figure 2 shows an example of the operating environment for the battery state estimation device 10 shown in Figure 1. In this example, the battery state estimation device 10 acquires parking position information and battery information from a transmitter 22 mounted on the vehicle 20. The battery state estimation device 10 and the transmitter 22 constitute at least part of the battery state estimation system.

[0017] The following describes a detailed example of the battery state estimation device 10.

[0018] Figure 3 shows a detailed example of the usage environment for the battery state estimation device 10. The battery state estimation device 10 is possessed by, for example, at least one of the users, owners, and administrators of the vehicle 20. The battery state estimation device 10 may be a portable communication terminal such as a smartphone or tablet, or it may be a fixed device.

[0019] When the vehicle 20 stops, the transmitter 22 transmits the stopping position information and battery information to the battery state estimation device 10. Furthermore, when the stopped vehicle 20 starts up, the transmitter 22 transmits startup information to the battery state estimation device 10.

[0020] Furthermore, "vehicle 20 is stopped" means that if vehicle 20 has an engine, the engine is stopped, or if vehicle 20 is an electric vehicle, power is not being supplied to the motor, or the control unit that controls this power supply is turned off.

[0021] The battery state estimation device 10 is used in conjunction with the model generation device 30, in addition to the transmission device 22. The estimation unit 140 of the battery state estimation device 10 uses a model generated by machine learning when estimating the battery state. The model generation device 30 generates this model and stores it in the battery state estimation device 10.

[0022] As described above, the battery state estimation device 10 includes a vehicle data acquisition unit 110, a temperature data acquisition unit 120, and an estimation unit 140. The battery state estimation device 10 also includes an indoor / outdoor determination unit 130, an output unit 150, a model storage unit 162, a history storage unit 164, and a map data storage unit 166.

[0023] The model storage unit 162 stores the models generated by the model generation device 30.

[0024] The history storage unit 164 stores the history of various data for each vehicle. The data stored in the history storage unit 164 includes parking position information, battery information, and estimation results from the estimation unit 140.

[0025] The map data storage unit 166 stores map data. This map data includes location information, such as latitude and longitude information, and information indicating whether or not there are buildings at that location. The map data also includes information indicating whether or not there are temperature sensors inside the building, for example, in the parking space, if there are buildings, and a method for obtaining detection results from these temperature sensors.

[0026] At least one of the model storage unit 162, the history storage unit 164, and the map data storage unit 166 may be located outside the battery state estimation device 10.

[0027] As explained with reference to Figures 1 and 2, the vehicle data acquisition unit 110 acquires parking position information and battery information from the transmission device 22 mounted on the vehicle 20, and stores the acquired data in the history storage unit 164.

[0028] The stopping position information indicates the location where the vehicle 20 has stopped. An example of stopping position information is latitude and longitude information indicating the stopping position. In this case, the vehicle 20 generates the latitude and longitude information using, for example, GPS.

[0029] The battery information includes parameters that indicate the state of the battery in the vehicle 20, as illustrated in Figure 1. These parameters include, but are not limited to, at least one of the State of Charge (SOC) and the output voltage, as described above.

[0030] As explained with reference to Figure 1, the temperature data acquisition unit 120 uses the stopping position information to acquire temperature data, which is data relating to the temperature at the stopping position, and stores the acquired data in the history storage unit 164. At this time, the temperature data acquisition unit 120 uses the determination result of the indoor / outdoor determination unit 130. An example of temperature data is the measured temperature. However, the temperature data may also include estimated or predicted temperature values ​​in addition to measured values.

[0031] The indoor / outdoor determination unit 130 uses the stopping position information to determine whether the stopping position is indoors or outdoors. In doing so, the indoor / outdoor determination unit 130 uses the map data stored in the map data storage unit 166.

[0032] The temperature data acquisition unit 120 then acquires temperature data measured at the closest measurement point to the parking location information from an external data server, such as the Japan Meteorological Agency's server, if the parking location is outdoors.

[0033] On the other hand, the temperature data acquisition unit 120 performs one of the following processes if the stopping position is indoors. 1) The temperature data acquisition unit 120 acquires temperature data measured at the measurement point closest to the vehicle's stopping position from an external data server, such as the Japan Meteorological Agency's server. 2) If the map data indicates that there is a temperature sensor at the building corresponding to the stopping position, the temperature data acquisition unit 120 acquires the detection result of this temperature sensor as temperature data.

[0034] As explained with reference to Figure 1, the estimation unit 140 estimates the battery state after the vehicle has stopped using battery information and temperature data. Hereinafter, the estimation results by the estimation unit 140 will be referred to as estimated information. The estimated information includes, for example, estimated values ​​of battery parameters, such as estimated values ​​of at least one of SOC and output voltage.

[0035] More specifically, the estimated information includes, for example, at least one of the following: A) Estimated values ​​of battery parameters after a predetermined period of time has elapsed. The predetermined period may be, for example, one week or two weeks, but is not limited to these. B) Estimated results of changes in battery parameters over time. For example, estimated values ​​of battery parameters at multiple elapsed times (e.g., after 1 day, 7 days, and 14 days).

[0036] The estimation unit 140 uses the model stored in the model storage unit 162 when generating estimation information. This model is generated by the model generation device 30. The explanatory variables of this model include at least battery information at the time of stopping and temperature data at the stopping location. The target variable of this model is the estimation information described above.

[0037] Here, the temperature data included in the explanatory variables may represent the change in temperature at the stopping position after the vehicle 20 has stopped. This change may be an actual measured value or a predicted value. In the latter case, the predicted temperature value may be obtained from, for example, an external data server.

[0038] The temperature data acquisition unit 120 and the estimation unit 140 may perform the above processing repeatedly, for example, every 24 hours. In this case, if the temperature data acquired by the temperature data acquisition unit 120 includes actual temperature values, the actual temperature values ​​repeatedly acquired by the temperature data acquisition unit 120 will show the temperature trend at the stopping position after the vehicle has stopped. These actual temperature values ​​are then stored in the history storage unit 164. The estimation unit 140 may use the data stored in the history storage unit 164 to identify the temperature trend and generate estimation information using this trend. In this case, the explanatory variables of the model stored in the model storage unit 162 include this trend.

[0039] Furthermore, the vehicle data acquisition unit 110 may also acquire battery information from the repeat transmission device 22. In this case, the estimation unit 140 may generate estimation information each time the vehicle data acquisition unit 110 acquires battery information. In this estimation, it is preferable that the temperature data acquisition unit 120 acquires the latest temperature data and provides it to the estimation unit 140.

[0040] In this case, the battery information repeatedly acquired by the vehicle data acquisition unit 110 shows the trend of actual values ​​of the battery parameters. These actual values ​​are stored in the history storage unit 164. The estimation unit 140 may use the data stored in the history storage unit 164 to identify the trend of the battery parameters and generate estimation information using this trend. In this case, the explanatory variables of the model stored in the model storage unit 162 include this trend.

[0041] Furthermore, if the vehicle 20 is parked indoors, the estimation unit 140 may correct the temperature data acquired by the temperature data acquisition unit 120 from an external data server and generate estimation information using this corrected temperature data. Generally, the temperature data stored in an external data server represents the outdoor temperature. Therefore, the estimation unit 140 corrects the temperature data acquired by the temperature data acquisition unit 120 to the higher side, bringing it closer to the indoor temperature. This allows the estimation unit 140 to estimate the battery status with high accuracy.

[0042] Furthermore, the estimation unit 140 may correct the temperature data acquired by the temperature data acquisition unit 120 even if the vehicle 20 is parked outdoors. One example of when this correction is necessary is when the elevation difference between the vehicle 20's parking position and the temperature data measurement point is greater than or equal to a standard value.

[0043] Furthermore, the estimation unit 140 may store the estimation information in the history storage unit 164, linking it to information indicating the estimation timing. In this case, the estimation unit 140 may further generate estimation information using at least one of past estimation information, i.e., past information, and the temperature data used when generating the past information. In this case, the explanatory variables of the model stored in the model storage unit 162 further include the information used here.

[0044] The output unit 150 outputs estimated information. The output unit 150 outputs the estimated information to, for example, a display on the battery state estimation device 10, or to an external printing device.

[0045] Furthermore, the output unit 150 outputs a predetermined value when the estimated information meets a criterion, that is, when the output condition is met. The criterion used here is, for example, that at least one of the SOC and voltage included in the estimated information falls below a criterion value. In this case, the predetermined output made by the output unit 150 indicates that the vehicle 20 may not start due to insufficient remaining battery capacity.

[0046] For example, at least one of the following is a detailed example of the conditions for outputting the specified information. a) When the estimated value corresponding to the current date and time among the estimated information from the estimation unit 140 falls below the reference value. In this case, the predetermined output indicates that, depending on the setting of the reference value, the remaining battery capacity may already be insufficient. b) In addition to the conditions in a), if the vehicle was not started until the time when the remaining battery capacity fell below the standard value. c) When the estimated value of the estimation information from the estimation unit 140 corresponding to "a predetermined time from the current date and time" falls below the standard value. This means that although the battery capacity is currently sufficient, there is a high probability that the battery capacity will become insufficient after a predetermined time, for example, 24 hours later. In this case, the predetermined output indicates that if the vehicle 20 is not started and the predetermined time elapses, there is a possibility that the battery capacity will become insufficient.

[0047] In addition to the above conditions, the output unit 150 may also output a predetermined value when it is estimated from the estimated information that the vehicle 20 is parked in an environment with a temperature above the first temperature or below the second temperature for a predetermined period of time or longer. Here, the first temperature is selected from, for example, a temperature of 30°C or higher. The second temperature is selected from, for example, a temperature of 0°C or lower.

[0048] The output unit 150 may then repeatedly output predetermined information, for example every 24 hours, after performing a predetermined output, until it receives startup information, i.e., information indicating that the vehicle 20 has started, from the transmission device 22.

[0049] The battery status estimation device 10 may also be a cloud server. In this case, the output unit 150 outputs the estimation information to a terminal owned by at least one of the users, owners, and administrators of the vehicle 20, and also performs the predetermined output described above. This terminal then displays the estimation information and also displays the predetermined output.

[0050] Figure 4 shows an example of the information stored in the history storage unit 164. The history storage unit 164 stores vehicle identification information for each vehicle, and stores the date and time of the vehicle's stopping, linked to the battery information at the time of stopping, the stopping location information, temperature data, estimated information, and the changes in the measured values ​​of the battery parameters after stopping. Note that the temperature data may show the measured or predicted values ​​of the temperature changes at the stopping location after the vehicle 20 has stopped.

[0051] Figure 5 is a schematic diagram showing an example of the estimated information provided by the estimation unit 140. In the example shown in this figure, the estimated information represents the estimated changes in battery parameters after the vehicle 20 has stopped, such as the estimated changes in SOC and output voltage. The output unit 150 then outputs a predetermined value when these parameters fall below a reference value.

[0052] Figure 6 shows an example of the hardware configuration of the battery state estimation device 10. The battery state estimation device 10 includes a bus 1010, a processor 1020, a memory 1030, a storage device 1040, an input / output interface 1050, and a network interface 1060.

[0053] Bus 1010 is a data transmission path for the processor 1020, memory 1030, storage device 1040, input / output interface 1050, and network interface 1060 to send and receive data to and from each other. However, the method of connecting the processor 1020 and the other components to each other is not limited to bus connection.

[0054] The 1020 processor is a processor implemented in components such as the CPU (Central Processing Unit) and GPU (Graphics Processing Unit).

[0055] Memory 1030 is a main memory device implemented using RAM (Random Access Memory), etc.

[0056] The storage device 1040 is an auxiliary storage device implemented as a removable media such as an HDD (Hard Disk Drive), SSD (Solid State Drive), or memory card, or as ROM (Read Only Memory). The storage device 1040 stores program modules that implement each function of the battery state estimation device 10 (for example, the vehicle data acquisition unit 110, the temperature data acquisition unit 120, the indoor / outdoor determination unit 130, the estimation unit 140, and the output unit 150). The processor 1020 reads these program modules into the memory 1030 and executes them, thereby realizing each function corresponding to the program module. The storage device 1040 also functions as at least part of the model storage unit 162, the history storage unit 164, and the map data storage unit 166.

[0057] The input / output interface 1050 is an interface for connecting the battery state estimation device 10 with various input / output devices.

[0058] The network interface 1060 is an interface for connecting the battery state estimation device 10 to a network. This network may be, for example, a LAN (Local Area Network) or a WAN (Wide Area Network). The network interface 1060 may connect to the network via a wireless connection or a wired connection. The battery state estimation device 10 communicates with the transmitter 22 and the model generation device 30 via the network interface 1060.

[0059] Figure 7 is a flowchart showing a first example of the processing performed by the battery state estimation device 10. When the vehicle 20 stops, the transmitting device 22 generates stopping position information and battery information and transmits them to the battery state estimation device 10. The vehicle data acquisition unit 110 of the battery state estimation device 10 acquires this stopping position information and battery information (step S10).

[0060] Next, the temperature data acquisition unit 120 of the battery state estimation device 10 acquires temperature data using the parking position information acquired in step S10 (step S20). At this time, the indoor / outdoor determination unit 130 of the battery state estimation device 10 determines whether the parking position is indoors or not. Details of step S20 will be described later with reference to other figures.

[0061] Next, the estimation unit 140 of the battery state estimation device 10 generates estimation information. As described above, the estimation information shows the result of estimating the battery state after the vehicle has stopped (step S30). Details of the processing performed by the estimation unit 140 are as explained with reference to Figure 3.

[0062] Next, the output unit 150 of the battery state estimation device 10 outputs the estimation information (step S40).

[0063] Figure 8 is a flowchart showing a detailed example of step S20 in Figure 7. First, the indoor / outdoor determination unit 130 uses the parking position information and the map data storage unit 166 to determine whether the parking position of the vehicle 20 is indoors or not (step S202).

[0064] If the stopping location is indoors (Step S202: Yes), the indoor / outdoor determination unit 130 uses the map data storage unit 166 to determine whether or not a temperature sensor is installed in the building corresponding to the stopping location of the vehicle 20. If a temperature sensor is present (Step S204: Yes), the temperature data acquisition unit 120 acquires the detection result of this temperature sensor. The temperature data acquisition unit 120 acquires this detection result by, for example, communicating with the temperature sensor (Step S206).

[0065] On the other hand, if the parking position is outdoors (step S202: No), or if a temperature sensor is not installed in the building corresponding to the parking position of the vehicle 20 (step S204: No), the temperature data acquisition unit 120 acquires temperature data from an external server at the measurement point closest to the position indicated by the parking position information (step S208). The estimation unit 140 then corrects this temperature data as necessary (steps S210, S212). Examples of cases where this correction is necessary include when the parking position of the vehicle 20 is indoors, and when the elevation difference between the parking position of the vehicle 20 and the temperature data measurement point is greater than or equal to a standard value.

[0066] Figure 9 is a flowchart showing a second example of the processing performed by the battery state estimation device 10. This figure shows the process by which the output unit 150 outputs predetermined information as needed after the estimation unit 140 generates estimation information. The output unit 150 repeats this process, for example, every 24 hours.

[0067] First, the output unit 150 determines whether the conditions for outputting predetermined information are met at the current date and time (step S100). The predetermined information indicates that the vehicle 20 may not start due to insufficient battery capacity, as explained using Figure 3. An example of the output conditions is either a) or c) as explained using Figure 3.

[0068] If the output conditions are met (Step S100: Yes) and the vehicle 20 has not yet started (Step S100: Yes), the output unit 150 generates predetermined information (Step S120) and outputs the generated predetermined information (Step S130). Specific examples of the output destination are as explained using Figure 3.

[0069] Figure 10 shows a modified version of the process shown in Figure 7. The example shown in this figure is the same as the example in Figure 7, except that the acquisition of battery information, acquisition of temperature data, generation of estimated information, and output are repeated.

[0070] In detail, after step S40, and after a predetermined time has elapsed, the vehicle data acquisition unit 110 acquires battery information (step S50). Subsequently, the processes shown in steps S20 to S40 are performed.

[0071] As described above, according to this embodiment, the temperature data acquisition unit 120 acquires temperature data using the vehicle 20's parking position information. The estimation unit 140 then estimates the battery state using this temperature data. Therefore, by using the battery state estimation device 10, it is possible to estimate the battery state using temperature data, and it is possible to suppress an increase in the user's workload when acquiring temperature data.

[0072] Furthermore, the indoor / outdoor determination unit 130 determines whether the vehicle 20 is parked indoors or not. The temperature data acquisition unit 120 then acquires temperature data from the temperature sensor if the parking location is indoors and a temperature sensor is installed in the building corresponding to this indoor location. Consequently, the accuracy of the battery state estimation result by the estimation unit 140 is improved.

[0073] Furthermore, if the vehicle is parked indoors and there is no temperature sensor installed in the building corresponding to this indoor location, the estimation unit 140 corrects the temperature data obtained from an external data server and estimates the battery status using the corrected temperature data. Therefore, the accuracy of the battery status estimation result by the estimation unit 140 is improved.

[0074] (Second embodiment) Figure 11 is a diagram showing the functional configuration of the battery state estimation device 10 according to this embodiment, and corresponds to Figure 3 of the first embodiment. The battery state estimation device 10 shown in this figure is the same as the battery state estimation device 10 according to the first embodiment, except for the following points.

[0075] First, the battery state estimation device 10 has a destination information storage unit 168. The destination information storage unit 168 stores information about candidate locations and facilities for the stationary vehicle 20 to move to. Hereafter, this information will be referred to as destination information. The output unit 150 then includes the destination information in a predetermined output.

[0076] For example, the destination information storage unit 168 stores location information of a place or facility and detailed information of that place or facility in association with each other as destination information. The detailed information stored in the destination information storage unit 168 indicates, for example, what can be experienced at that place or facility, or what products or services can be purchased. The detailed information may also include advertising information. The output unit 150 then selects a place or facility close to the location indicated by the stopping position information from the destination information storage unit 168, and includes the location information and detailed information of the selected place or facility in a predetermined output.

[0077] Figure 12 shows an example of the information output by the output unit 150 in this embodiment. In the example shown in this figure, the output unit 150 causes the display of the battery state estimation device 10 to display information indicating that the remaining battery capacity may be insufficient, as well as location information and detailed information of the place where the vehicle 20 should move to.

[0078] In this embodiment, as in the first embodiment, the battery status can be estimated using temperature data, and the workload for the user in acquiring temperature data can be suppressed. In addition, the output unit 150 outputs location information and detailed information of the place where the vehicle 20 should move to. Therefore, the battery status estimation device 10 can give the user or manager of the vehicle 20 a trigger to start the vehicle 20.

[0079] (Third embodiment) Figure 13 is a diagram showing the functional configuration of the battery state estimation device 10 according to this embodiment, and corresponds to Figure 11 of the second embodiment. The battery state estimation device 10 shown in this figure is the same as the battery state estimation device 10 according to the first or second embodiment, except that it has a data transmission unit 170.

[0080] When a predetermined time has elapsed since the vehicle stopped, the data transmission unit 170 uses the data stored in the history storage unit 164 to identify the difference between the estimated battery status and the measured battery status. If this difference is greater than or equal to a standard value, i.e., if the model's estimation result deviates significantly from the measured value, the data transmission unit 170 transmits at least the measured battery status and temperature data to an external device, such as a model generation device 30, outside the battery status estimation device 10. The data transmitted by the data transmission unit 170 is used as at least part of the training data for machine learning.

[0081] The model generation device 30 then updates the training data using the data acquired from the data transmission unit 170. The model generation device 30 then modifies the model using the updated training data and stores the modified model in the model storage unit 162 of the battery state estimation device 10.

[0082] The reference value for which the data transmission unit 170 transmits data is determined, for example, by the criterion that sufficient output cannot be obtained from the battery to start the engine.

[0083] Similar to the first embodiment, this embodiment also allows for the estimation of the battery state using temperature data, while suppressing an increase in the user's workload when acquiring temperature data. Furthermore, the data transmission unit 170 transmits at least the measured battery state and temperature data externally for model retraining when the difference between the estimated battery state and the measured battery state is greater than or equal to a reference value. Consequently, the accuracy of the model used by the battery state estimation device 10 is improved.

[0084] The embodiments of the present invention have been described above with reference to the drawings, but these are merely examples of the present invention, and various other configurations can also be adopted.

[0085] Furthermore, while the flowcharts used in the above description show multiple steps (processes) in sequence, the execution order of the steps performed in each embodiment is not limited to the order in which they are described. In each embodiment, the order of the illustrated steps can be changed to the extent that it does not impede the content. Also, the above embodiments can be combined to the extent that their contents do not conflict.

[0086] Some or all of the above embodiments may also be described as follows, but are not limited to the following: 1. A vehicle data acquisition means that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the status of the battery at the parking position, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, A battery state estimation device equipped with the following features. 2. In the battery state estimation device described in item 1 above, The temperature data acquisition means acquires the temperature data corresponding to the stopping position information from a weather information storage means that stores temperature data for multiple locations, Furthermore, the system includes an indoor / outdoor determination means that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The estimation means is, A battery state estimation device that, when the parking location is indoors, corrects the temperature data before estimating the battery state. 3. In the battery state estimation device described in 1 or 2 above, Furthermore, the system includes an indoor / outdoor determination means that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The temperature data acquisition means is a battery state estimation device that, when the parking position is indoors, acquires the temperature data from a temperature sensor installed at the parking position. 4. In the battery state estimation device described in any one of items 1 to 3 above, A battery state estimation device that estimates the state of the battery by further using past information showing past estimation results by the estimation means and at least one of the temperature data used when generating the past information. 5. In the battery state estimation device described in any one of items 1 to 4 above, The estimation means is, Using the aforementioned temperature data, the temperature changes at the stopping location after the vehicle has stopped are identified. A battery state estimation device that estimates the state of the battery using the aforementioned temperature changes. 6. In the battery state estimation device described in any one of items 1 to 5 above, After the vehicle has stopped, until the vehicle starts up again, The vehicle data acquisition means repeatedly acquires the battery information, The estimation means is a battery state estimation device that repeatedly estimates the state of the battery. 7. In a battery state estimation device described in any one of items 1 to 6 above, A battery state estimation device comprising an output means that outputs a predetermined value when the estimation result by the estimation means meets a standard. 8. In the battery state estimation device described in item 7 above, The aforementioned estimation results include the change in the value indicating the remaining battery capacity after the vehicle has stopped. The output means is a battery state estimation device that provides a predetermined output when the vehicle does not start up until the timing in which the remaining battery capacity falls below a reference value during the transition. 9. In the battery state estimation device described in 7 or 8 above, The output means is a battery state estimation device that repeatedly performs the predetermined output until the vehicle starts up. 10. In the battery state estimation device described in any one of items 7 to 9 above, The predetermined output includes destination information indicating candidate destinations for the vehicle, and is a battery state estimation device. 11. In a battery state estimation device described in any one of items 1 to 10 above, The estimation means estimates the state of the battery using a model generated by machine learning, with the battery information and temperature data as explanatory variables and the state of the battery as the dependent variable. Furthermore, the battery state estimation device includes data transmission means for transmitting at least the measured battery state and the temperature data to an external source for use as at least part of the training data for machine learning, if a predetermined time has elapsed since the vehicle stopped and the difference between the estimated battery state and the measured battery state is greater than a standard. 12. A transmitter mounted on the vehicle, Battery state estimation device, Equipped with, The aforementioned vehicle is equipped with a battery, The transmitting device transmits to the battery state estimation device the stopping position information indicating the stopping position of the vehicle, and the battery state information indicating the state of the battery at the stopping position. The aforementioned battery state estimation device is A vehicle data acquisition means for acquiring the aforementioned parking position information and the aforementioned battery information, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, A battery state estimation system equipped with the following features. 13. In the battery state estimation system described in item 12 above, The temperature data acquisition means acquires the temperature data corresponding to the stopping position information from a weather information storage means that stores temperature data for multiple locations, The battery state estimation device further includes an indoor / outdoor determination means that uses the parking location information to determine whether the parking location is indoors or outdoors. The estimation means is, A battery state estimation system that, when the parking location is indoors, corrects the temperature data before estimating the battery state. 14. In the battery state estimation system described in 12 or 13 above, The battery state estimation device further includes an indoor / outdoor determination means that uses the parking location information to determine whether the parking location is indoors or outdoors. The aforementioned temperature data acquisition means is a battery state estimation system that, when the parking location is indoors, acquires temperature data from a temperature sensor installed at the parking location. 15. In the battery state estimation system described in any one of items 12 to 14 above, A battery state estimation system that estimates the state of the battery by further using past information showing past estimation results by the estimation means and at least one of the temperature data used when generating the past information. 16. In the battery state estimation system described in any one of items 12 to 15 above, The estimation means is, Using the aforementioned temperature data, the temperature changes at the stopping location after the vehicle has stopped are identified. A battery state estimation system that estimates the state of the battery using the aforementioned temperature changes. 17. In the battery state estimation system described in any one of items 12 to 16 above, After the vehicle has stopped, until the vehicle starts up again, The vehicle data acquisition means repeatedly acquires the battery information, The estimation means is a battery state estimation system that repeatedly estimates the state of the battery. 18. In the battery state estimation system described in any one of items 12 to 17 above, The battery state estimation device is a battery state estimation system comprising an output means that outputs a predetermined value when the estimation result by the estimation means meets a criterion. 19. In the battery state estimation system described in item 18 above, The aforementioned estimation results include the change in the value indicating the remaining battery capacity after the vehicle has stopped. The output means is a battery state estimation system that provides a predetermined output when the vehicle does not start up until the timing in which the remaining battery capacity falls below a reference value during the transition. 20. In the battery state estimation system described in 18 or 19 above, The output means is a battery state estimation system that repeatedly performs the predetermined output until the vehicle starts up. 21. In the battery state estimation system described in any one of items 18 to 20 above, The predetermined output includes destination information indicating candidate destinations for the vehicle, and is a battery state estimation system. 22. In the battery state estimation system described in any one of items 12 to 21 above, The estimation means estimates the state of the battery using a model generated by machine learning, with the battery information and temperature data as explanatory variables and the state of the battery as the dependent variable. The battery state estimation device further includes a data transmission means that, when a predetermined time has elapsed since the vehicle stopped, and the difference between the estimated battery state and the measured battery state is greater than or equal to a standard, transmits at least the measured battery state and the temperature data to an external source for use as at least part of the training data for machine learning. 23. Computers, The system acquires parking location information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the status of the battery at the parking location. Using the aforementioned stopping position information, temperature data, which is data relating to the temperature at the stopping position, A battery state estimation method that estimates the state of the battery after the vehicle has stopped, using the battery information and temperature data. 24. In the battery state estimation method described in 23 above, The aforementioned computer, From a weather information storage means that stores temperature data for multiple locations, the temperature data corresponding to the stopping location information is obtained. Using the aforementioned parking position information, it is determined whether the parking position is indoors or outdoors. A battery state estimation method that, when the parking location is indoors, estimates the battery state after correcting the temperature data. 25. In the battery state estimation method described in 23 or 24 above, The aforementioned computer, Using the aforementioned parking position information, it is determined whether the parking position is indoors or outdoors. A battery state estimation method that, when the parking location is indoors, obtains temperature data from a temperature sensor installed at the parking location. 26. In the battery state estimation method described in any one of items 23 to 25 above, A battery state estimation method comprising a computer that estimates the state of the battery using, further, historical information showing past estimation results and temperature data used in generating the historical information. 27. In the battery state estimation method described in any one of items 23 to 26 above, The aforementioned computer, Using the aforementioned temperature data, the temperature changes at the stopping location after the vehicle has stopped are identified. A battery state estimation method that estimates the state of the battery using the aforementioned temperature changes. 28. In the battery state estimation method described in any one of items 23 to 27 above, After the vehicle has stopped, until the vehicle starts up, the computer will: The battery information is repeatedly acquired, A battery state estimation method for repeatedly estimating the state of the battery. 29. In the battery state estimation method described in any one of items 23 to 28 above, The computer is a battery state estimation method that outputs a predetermined value when the estimation result meets a criterion. 30. In the battery state estimation method described in item 29 above, The aforementioned estimation results include the change in the value indicating the remaining battery capacity after the vehicle has stopped. A battery state estimation method in which the computer provides a predetermined output when the vehicle does not start up until the timing in which the remaining battery capacity falls below a reference value during the aforementioned transition. 31. In the battery state estimation method described in 29 or 30 above, The computer is a battery state estimation method that repeatedly performs the predetermined output until the vehicle starts up. 32. In the battery state estimation method described in any one of items 29 to 31 above, A battery state estimation method wherein the predetermined output includes destination information indicating candidate destinations for the vehicle. 33. In the battery state estimation method described in any one of items 29 to 32 above, The aforementioned computer, Using the aforementioned battery information and temperature data as explanatory variables, and the battery state as the dependent variable, a model generated by machine learning is used to estimate the battery state. A battery state estimation method, wherein, when a predetermined time has elapsed since the vehicle stopped, and the difference between the estimated battery state and the measured battery state is greater than a certain threshold, at least the measured battery state and the temperature data are transmitted externally for use as at least part of the training data for machine learning. 34. To the computer, A vehicle data acquisition function that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the status of the battery at the parking position, A temperature data acquisition function that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation function that estimates the state of the battery after the vehicle has stopped, using the battery information and temperature data, A computer-readable recording medium that stores a program to give something a certain property. 35. In the recording medium described in 34 above, The temperature data acquisition function acquires the temperature data corresponding to the stopping position information from a weather information storage means that stores temperature data for multiple locations, Furthermore, the program provides the computer with an indoor / outdoor determination function that uses the parking position information to determine whether the parking position is indoors or outdoors. The aforementioned estimation function, A recording medium that, when the parking location is indoors, corrects the temperature data before estimating the state of the battery. 36. In the recording medium described in 34 or 35 above, Furthermore, the program provides the computer with an indoor / outdoor determination function that uses the parking position information to determine whether the parking position is indoors or outdoors. The aforementioned temperature data acquisition function is a recording medium that acquires temperature data from a temperature sensor installed at the parking location when the parking location is indoors. 37. In the recording medium described in any one of the above paragraphs 34 to 36, The estimation function is a recording medium that estimates the state of the battery using at least one of past information showing past estimation results and the temperature data used when generating the past information. 38. In the recording medium described in any one of items 34 to 37 above, The aforementioned estimation function, Using the aforementioned temperature data, the temperature changes at the stopping location after the vehicle has stopped are identified. A recording medium that estimates the state of the battery using the aforementioned temperature changes. 39. In the recording medium described in any one of the above paragraphs 34 to 38, After the vehicle has stopped, until the vehicle starts up again, The vehicle data acquisition function repeatedly acquires the battery information, The estimation function is a recording medium that repeatedly estimates the state of the battery. 40. In any of the recording media described in items 34 to 39 above, The program is a recording medium that provides the computer with an output function that outputs a predetermined output when the estimation result obtained by the estimation function meets a criterion. 41. In the recording medium described in item 40 above, The aforementioned estimation results include the change in the value indicating the remaining battery capacity after the vehicle has stopped. The output function is a recording medium that performs the predetermined output when the vehicle does not start up until the timing in the progression where the remaining battery capacity falls below a standard value. 42. In the recording medium described in 40 or 41 above, The output function is a recording medium that repeatedly performs the predetermined output until the vehicle starts up. 43. In the recording medium described in any one of items 40 to 42 above, The predetermined output is a recording medium that includes destination information indicating candidate destinations for the vehicle. 44. In any of the recording media described in items 34 to 43 above, The estimation function estimates the state of the battery using a model generated by machine learning, with the battery information and temperature data as explanatory variables and the state of the battery as the dependent variable. The program further provides the computer with a data transmission function that, when a predetermined time has elapsed since the vehicle stopped, transmits to the outside at least the measured battery state and the temperature data to be used as at least part of the training data for machine learning if the difference between the estimated battery state and the measured battery state exceeds a certain threshold. 45. A program described in any one of the above items 34 to 44. [Explanation of Symbols]

[0087] 10 Battery state estimation device 20 vehicles 22 Transmitter 30 Model Generators 110 Vehicle data acquisition unit 120 Temperature data acquisition unit 130 Indoor / Outdoor Judgment Department 140 Estimation part 150 Output section 162 Model Memory Unit 164 History Storage Unit 166 Map data storage unit 168 Destination Information Storage Unit 170 Data transmission unit

Claims

1. A vehicle data acquisition means that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the state of the battery at the parking position, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, Equipped with, The temperature data acquisition means acquires the temperature data corresponding to the stopping position information from a weather information storage means that stores temperature data for multiple locations, Furthermore, the system includes an indoor / outdoor determination means that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The estimation means is, A battery state estimation device that, when the parking location is indoors, corrects the temperature data before estimating the state of the battery.

2. A vehicle data acquisition means that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the state of the battery at the parking position, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, Equipped with, Furthermore, the system includes an indoor / outdoor determination means that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The temperature data acquisition means is a battery state estimation device that, when the parking position is indoors, acquires the temperature data from a temperature sensor installed at the parking position.

3. A vehicle data acquisition means that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the state of the battery at the parking position, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, Equipped with, The estimation means estimates the state of the battery using a model generated by machine learning, with the battery information and temperature data as explanatory variables and the state of the battery as the dependent variable. Furthermore, the battery state estimation device includes data transmission means for transmitting at least the measured battery state and the temperature data to an external source for use as at least part of the training data for machine learning, if a predetermined time has elapsed since the vehicle stopped and the difference between the estimated battery state and the measured battery state is greater than a standard.

4. The transmission device mounted on the vehicle, Battery state estimation device, Equipped with, The aforementioned vehicle is equipped with a battery, The transmitting device transmits to the battery state estimation device the stopping position information indicating the stopping position of the vehicle, and the battery state information indicating the state of the battery at the stopping position. The aforementioned battery state estimation device is A vehicle data acquisition means for acquiring the aforementioned parking position information and the aforementioned battery information, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, Equipped with, The temperature data acquisition means acquires the temperature data corresponding to the stopping position information from a weather information storage means that stores temperature data for multiple locations, Furthermore, the system includes an indoor / outdoor determination means that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The estimation means is, A battery state estimation system that, when the parking location is indoors, corrects the temperature data before estimating the battery state.

5. Computers The system acquires parking location information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the status of the battery at the parking location. Using the aforementioned parking position information, temperature data, which is data relating to the temperature at the parking position, is obtained. Using the aforementioned battery information and temperature data, the state of the battery after the vehicle has stopped is estimated. From a weather information storage means that stores temperature data for multiple locations, the temperature data corresponding to the stopping location information is obtained. Furthermore, using the aforementioned parking position information, it is determined whether the parking position is indoors or outdoors. A battery state estimation method that, when the parking location is indoors, estimates the battery state after correcting the temperature data.

6. On the computer, A vehicle data acquisition function that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the status of the battery at the parking position, A temperature data acquisition function that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation function that estimates the state of the battery after the vehicle has stopped, using the battery information and temperature data, Give it to him The temperature data acquisition function acquires the temperature data corresponding to the stopping position information from a weather information storage means that stores temperature data for multiple locations, Furthermore, the system includes an indoor / outdoor determination function that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The aforementioned estimation function is, A program that, if the parking location is indoors, corrects the temperature data before estimating the battery status.

7. A transmitting device mounted on a vehicle, Battery state estimation device, Equipped with, The aforementioned vehicle is equipped with a battery, The transmitting device transmits to the battery state estimation device the stopping position information indicating the stopping position of the vehicle, and the battery state information indicating the state of the battery at the stopping position. The aforementioned battery state estimation device is A vehicle data acquisition means for acquiring the aforementioned parking position information and the aforementioned battery information, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, Equipped with, Furthermore, the system includes an indoor / outdoor determination means that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The temperature data acquisition means is a battery state estimation system that acquires temperature data from a temperature sensor installed at the parking location when the parking location is indoors.

8. A computer, The system acquires parking location information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the status of the battery at the parking location. Using the aforementioned parking position information, temperature data, which is data relating to the temperature at the parking position, is obtained. Using the aforementioned battery information and temperature data, the state of the battery after the vehicle has stopped is estimated. Furthermore, using the aforementioned parking position information, it is determined whether the parking position is indoors or outdoors. A battery state estimation method that, when the parking location is indoors, obtains temperature data from a temperature sensor installed at the parking location.

9. A computer, A vehicle data acquisition function that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the status of the battery at the parking position, A temperature data acquisition function that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation function that estimates the state of the battery after the vehicle has stopped, using the battery information and temperature data, Give it to him Furthermore, the system includes an indoor / outdoor determination function that uses the aforementioned parking position information to determine whether the parking position is indoors or outdoors. The aforementioned temperature data acquisition function is a program that acquires temperature data from a temperature sensor installed at the parking location when the parking location is indoors.

10. A transmitting device mounted on a vehicle, Battery state estimation device, Equipped with, The aforementioned vehicle is equipped with a battery, The transmitting device transmits to the battery state estimation device the stopping position information indicating the stopping position of the vehicle, and the battery state information indicating the state of the battery at the stopping position. The aforementioned battery state estimation device is A vehicle data acquisition means for acquiring the aforementioned parking position information and the aforementioned battery information, A temperature data acquisition means that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation means for estimating the state of the battery after the vehicle has stopped, using the battery information and temperature data, Equipped with, The estimation means estimates the state of the battery using a model generated by machine learning, with the battery information and temperature data as explanatory variables and the state of the battery as the dependent variable. Furthermore, the battery state estimation system includes data transmission means for transmitting at least the measured battery state and the temperature data to an external source for use as at least part of the training data for machine learning, if a predetermined time has elapsed since the vehicle stopped and the difference between the estimated battery state and the measured battery state is greater than a certain threshold.

11. A computer, The system acquires parking location information indicating the parking position of a vehicle equipped with a battery, and also acquires battery information indicating the status of the battery at the parking location. Using the aforementioned parking position information, temperature data, which is data relating to the temperature at the parking position, is obtained. Using the aforementioned battery information and temperature data, the state of the battery after the vehicle has stopped is estimated. Using the aforementioned battery information and temperature data as explanatory variables, and the battery state as the dependent variable, a model generated by machine learning is used to estimate the battery state. Furthermore, a battery state estimation method that, when a predetermined time has elapsed since the vehicle stopped, and the difference between the estimated battery state and the measured battery state is greater than a standard, transmits at least the measured battery state and the temperature data to an external source for use as at least part of the training data for machine learning.

12. A computer, A vehicle data acquisition function that acquires parking position information indicating the parking position of a vehicle equipped with a battery, and battery information indicating the status of the battery at the parking position, A temperature data acquisition function that uses the aforementioned stopping position information to acquire temperature data, which is data relating to the temperature at the aforementioned stopping position, An estimation function that estimates the state of the battery after the vehicle has stopped, using the battery information and temperature data, Give it to him The estimation function estimates the state of the battery using a model generated by machine learning, with the battery information and temperature data as explanatory variables and the state of the battery as the dependent variable. Furthermore, the program has a data transmission function that, when a predetermined time has elapsed since the vehicle stopped, transmits at least the measured battery state and the temperature data to an external source for use as at least part of the training data for the machine learning if the difference between the estimated battery state and the measured battery state exceeds a certain threshold.

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