JP2015031587A - Battery capacity presentation device, battery capacity presentation system, information center, and battery capacity presentation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery capacity presentation device capable of reducing a display value to a display value as the display of the remaining capacity of a battery, at an appropriate timing.SOLUTION: There is provided a battery capacity presentation device comprising: estimation means 150 for estimating a state of charge of an in-vehicle battery 100, as a first estimate value, on the basis of battery information on the battery 100; communication means 140 for transmitting vehicle information including the battery information to an information center 200 and receiving, as a second estimate value, a value indicating the remaining capacity of a battery 110 estimated by the information center 200; presentation means 160 for presenting a display value displaying the remaining capacity of the battery 110; determination means 150 for determining, on the basis of the first estimate value and second estimate value, whether or not to reduce the display value of the remaining capacity of the battery 110; and control means 150 for making the presentation means 160 present the display value of the remaining capacity of the battery 110 after reducing when the display value of the remaining capacity of the battery 110 is determined to be reduced.

Description

  The present invention relates to a battery capacity presentation device, a battery capacity presentation system, an information center, and a battery capacity presentation method.

  2. Description of the Related Art Conventionally, a battery capacity presentation device that presents the remaining capacity of a battery to a user using a scale based on the state of charge (SOC) of the vehicle's battery is known (Patent Document 1).

JP 2011-257213 A

  However, in the conventional technology, since the SOC is estimated based only on the battery information that can be detected by the host vehicle, it may be difficult to estimate the SOC with high accuracy. Therefore, when the SOC decreases. In some cases, the scale indicating the remaining capacity of the battery is reduced at a timing earlier than the actual time.

  The problem to be solved by the present invention is to provide a battery capacity presentation device capable of reducing a scale representing the remaining capacity of a battery at an appropriate timing.

  The present invention is based on a first estimated value that is a value representing the state of charge of the battery estimated in the battery capacity presentation device and a second estimated value that is a value that represents the state of charge of the battery estimated in the information center. By determining whether or not to decrease the display value indicating the remaining battery capacity, and determining to decrease the display value of the remaining battery capacity, the display value of the remaining battery capacity is decreased and presented. Solve the above problems.

  According to the present invention, based on only the first estimated value estimated in the battery capacity presentation device, it is estimated in the battery capacity presentation device rather than determining whether or not to decrease the display value representing the remaining battery capacity. A scale representing the remaining capacity of the battery by determining whether or not to decrease the display value representing the remaining capacity of the battery based on the first estimated value and the second estimated value estimated in the information center. Can be reduced at an appropriate timing.

1 is a schematic configuration diagram of a battery capacity presentation system according to an embodiment. It is a figure which shows the example of a display of a battery capacity meter. It is a flowchart which shows the battery capacity presentation process which concerns on this embodiment. It is a figure for demonstrating the battery capacity presentation process which concerns on this embodiment. It is a figure for demonstrating the battery capacity presentation process which concerns on this embodiment. It is a figure for demonstrating the battery capacity presentation process which concerns on this embodiment. It is a figure for demonstrating the battery capacity presentation process which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the battery capacity presentation system according to the present embodiment can be used to present the capacity of a battery used in an apparatus other than an electric vehicle, a hybrid vehicle, and an engine vehicle. In the present embodiment, a battery capacity presentation system that presents the capacity of a battery mounted on a vehicle will be described as an example.

  FIG. 1 is a diagram illustrating a configuration of a battery capacity presentation system according to the present embodiment. The battery capacity presentation system according to the present embodiment includes an in-vehicle device 100 mounted on a vehicle and an information center 200 installed outside the vehicle, and the in-vehicle device 100 and the information center 200 can exchange information with each other. It has become. In FIG. 1, only one in-vehicle device 100 is illustrated for convenience of explanation, but the information center 200 can communicate with a plurality of in-vehicle devices 100.

  As shown in FIG. 1, the in-vehicle device 100 of this embodiment includes a battery 110, a sensor group 120, a vehicle controller 130, an in-vehicle communication device 140, an in-vehicle control device 150, and a battery capacity meter 160. Yes.

  The battery 110 includes a plurality of cells (single cells) that are secondary batteries, and these cells include, for example, a lead battery, a lithium ion battery, a nickel metal hydride battery, and the like. The battery 110 includes a sensor group 120 such as a voltage sensor, a current sensor, and a temperature sensor. The terminal voltage, charge / discharge current value, temperature, and the like of the battery 110 detected by the sensor group 120 are arranged. The battery information is transmitted to the in-vehicle control device 150.

  The vehicle controller 130 periodically detects vehicle travel information such as the travel distance, travel time, and travel region of the vehicle, and transmits the detected travel information of the vehicle to the in-vehicle control device 150. In addition, the vehicle controller 130 also detects the usage information of the battery 110 such as the power consumption (Km / Ah), the number of rapid charging, and the usage period of the battery 110 and transmits the detected usage information of the battery 110 to the in-vehicle control device 150 To do.

  The in-vehicle communication device 140 acquires vehicle information including battery information, vehicle travel information, and battery 110 usage information from the in-vehicle control device 150, and transmits the acquired vehicle information to the information center 200.

  Further, the in-vehicle communication device 140 transmits a request signal so as to estimate the SOC of the battery 110 to the information center 200 based on an instruction from the in-vehicle control device 150, and in response to the request signal, The SOC of the battery 110 estimated by the information center 200 is received from the center communication device 210 of the information center 200. Then, the SOC of the battery 110 estimated by the information center 200 is output to the in-vehicle control device 150. The SOC estimation method by the information center 200 will be described later.

  The in-vehicle control device 150 includes a ROM (Read Only Memory) in which a program for determining whether or not to reduce the scale representing the remaining capacity R of the battery 110 and an operation for executing the program stored in the ROM. A CPU (Central Processing Unit) as a circuit and a RAM (Random Access Memory) functioning as an accessible storage device are provided. As the operation circuit, an MPU (Micro Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or the like can be used instead of or in addition to the CPU. .

And the vehicle-mounted control apparatus 150 estimates the vehicle information acquisition function which acquires the vehicle information containing battery information, and SOC of the battery 110 as 1st estimated value _Ecar by running the program stored in ROM by CPU. Whether to reduce the scale of the remaining capacity R of the battery 110 displayed on the battery capacity meter 160 and the charge state acquisition function of acquiring the SOC of the battery 110 estimated by the information center 200 from the information center 200 A scale reduction determination function for determining whether or not and a vehicle information transmission function for transmitting vehicle information to the information center 200 are realized. Below, each function which the vehicle-mounted control apparatus 150 implement | achieves is demonstrated.

  The vehicle information acquisition function of the in-vehicle control device 150 acquires vehicle information including battery information, travel information of the host vehicle, and usage information of the battery 110. Specifically, the vehicle information acquisition function acquires battery information including terminal voltage, charge / discharge current value, and temperature of the battery 110 from the sensor group 120 of the battery 110 as vehicle information. Furthermore, the vehicle information acquisition function obtains from the vehicle controller 130 travel information including the travel distance, travel time, and travel region of the host vehicle, as well as battery 110 usage information including battery 110 power consumption, number of quick charges, and usage period. Obtained as vehicle information.

The charge state estimation function of the in-vehicle control device 150 estimates the SOC of the battery 110 as the first estimated value E _car based on the battery information of the host vehicle acquired by the vehicle information acquisition function. Specifically, the charge state estimation function integrates the charge / discharge current value of the battery 110 of the host vehicle acquired by the vehicle information acquisition function, and calculates the SOC of the battery 110 based on the integrated value of the charge / discharge current value. , And can be estimated as the first estimated value E _car . Further, when the open state voltage of the battery 110 can be detected, the charge state estimating function refers to a map showing the correspondence relationship between the terminal voltage (open circuit voltage), the temperature, and the SOC of the battery 110 acquired by the vehicle information acquisition function. Thus, the SOC of the battery 110 can be estimated based on the terminal voltage (open voltage) and the temperature of the battery 110. A map showing the correspondence between the terminal voltage (open voltage), temperature, and SOC of battery 110 is stored in advance in the ROM of in-vehicle control device 150.

The charge state acquisition function of the in-vehicle control device 150 acquires the SOC of the battery 110 estimated in the information center 200 from the information center 200 via the in-vehicle communication device 140 as the second estimated value E _server . A method for estimating the second estimated value E _server by the information center 200 will be described later.

The scale reduction determination function of the in-vehicle controller 150 includes a first estimated value E _car that is the SOC of the battery 110 estimated in the in-vehicle device 100 and a second estimated value E that is the SOC of the battery 110 estimated in the information center 200. Based on “ _server” , it is determined whether or not to reduce the scale of the remaining capacity R displayed to the user. A determination method using the scale reduction determination function will be described later.

  The vehicle information transmission function of the in-vehicle control device 150 transmits the vehicle information of the host vehicle acquired by the vehicle information acquisition function to the information center 200 via the in-vehicle communication device 140. The vehicle information transmission function repeatedly transmits the vehicle information of the host vehicle to the information center 200 at regular time intervals. The vehicle information of the host vehicle transmitted to the information center 200 is stored in the database 220 of the information center 200, and is used when the information center 200 estimates the SOC of the battery of the host vehicle or another vehicle.

  The in-vehicle control device 150 also has a function of calculating the full charge capacity F of the battery 110. For example, a map indicating a correspondence relationship between the terminal voltage and temperature of the battery 110 and the full charge capacity F of the battery 110 is stored in the ROM included in the in-vehicle control device 150. The in-vehicle control device 150 refers to this map. Thus, the full charge capacity F of the battery 110 can be estimated based on the current terminal voltage and temperature of the battery 110.

  The battery capacity meter 160 is installed on an instrument panel or the like, and displays a scale indicating the remaining capacity R and the full charge capacity F of the battery 110 as shown in FIG. Here, FIG. 2 is a diagram showing a display example of the battery capacity meter 160. In the present embodiment, as shown in FIG. 2, a scale representing the remaining capacity R and a scale representing the full charge capacity F are displayed side by side. In the present embodiment, the battery capacity meter 160 includes ten liquid crystal segments for displaying the remaining capacity R and the full charge capacity F of the battery 110 on a scale, and the remaining capacity R and the remaining capacity R of the battery 110 are displayed. By turning on the liquid crystal segment corresponding to the size of the full charge capacity F, the remaining capacity R and the full charge capacity F of the battery 110 can be displayed using a scale.

  Specifically, the battery capacity meter 160 turns on the liquid crystal segment indicating the remaining capacity R of the battery 110 in accordance with an instruction from the in-vehicle control device 150, so that the remaining capacity R of the battery 110 as illustrated in FIG. 2. Is displayed on the scale. In the present embodiment, the battery capacity meter 160 displays the remaining capacity R of the battery 110 in 10 levels using 10 liquid crystal segments, and each level corresponds to a certain range of SOC. Yes. For example, in the present embodiment, the first (first from the bottom) liquid crystal segment corresponds to 0 to 10% of the SOC, and the remaining capacity R of the battery 110 is displayed as “1” which is the smallest among the 10 levels. The The second (second from the bottom) liquid crystal segment corresponds to 10 to 20% of the SOC, and the remaining capacity R of the battery 110 is displayed as “2”. Further, the tenth (first from the top) liquid crystal segment corresponds to 90 to 100% of the SOC, and the remaining capacity R of the battery 110 is displayed as “10”. Similarly, the other liquid crystal segments also correspond to the SOC of the battery 110 and display the remaining capacity R of the battery 110, respectively. Thus, the battery capacity meter 160 can present the remaining capacity R of the battery 110 to the driver by turning on the liquid crystal segment according to the SOC of the battery 110.

  In the present embodiment, it is determined whether or not the in-vehicle control device 150 reduces the scale of the remaining capacity R of the battery 110, and when it is determined that the scale of the remaining capacity R is to be decreased, the remaining capacity R The determination result indicating that the scale is reduced is transmitted from the in-vehicle control device 150 to the battery capacity meter 160. When the battery capacity meter 160 receives a determination result indicating that the scale of the remaining capacity R of the battery 110 is reduced from the in-vehicle control device 150, the battery capacity meter 160 decreases the scale indicating the remaining capacity R of the battery 110. For example, as shown in FIG. 2, the battery capacity meter 160 has a remaining capacity R of the battery 110 when the sixth liquid crystal segment is lit (when the scale indicating the remaining capacity R is “6”). Is received from the in-vehicle control device 150, the scale indicating the remaining capacity R is decreased from “6” to “5”. Thus, in this embodiment, when the instruction | indication which reduces the scale of the remaining capacity R from the vehicle-mounted control apparatus 150 is received, the scale of the remaining capacity R of the battery 110 is reduced based on this instruction | indication.

  Further, the battery capacity meter 160 displays the full charge capacity F of the battery 110 on a scale by turning on the liquid crystal segment corresponding to the full charge capacity F of the battery 110. For example, when the full charge capacity F of the battery 110 is about the same as when it is new (not deteriorated), the battery capacity meter 160 displays all the liquid crystals in the ten liquid crystal segments as shown in FIG. By turning on the segment, the scale indicating the full charge capacity F of the battery 110 is displayed as “10”. In the present embodiment, the configuration using the liquid crystal segment is illustrated, but a configuration using a display such as an analog or digital display may be used.

  Next, the information center 200 will be described. The information center 200 collects vehicle information from a plurality of in-vehicle devices 100 mounted on a plurality of vehicles, and estimates the SOC of the battery 110 of each in-vehicle device 100 based on the collected vehicle information. As shown in FIG. 1, the information center 200 includes a center communication device 210, a database 220, and a center control device 230.

Center communication device 210 receives vehicle information from a plurality of in-vehicle devices 100 and transmits the received vehicle information to center control device 230. Further, as will be described later, the center communication device 210 receives a request signal for estimating the SOC of the battery 110 from the in-vehicle device 100, and sets the SOC of the battery 110 estimated in response to the received request signal to the second estimated value. It transmits to the vehicle-mounted apparatus 100 as E _server .

  The database 220 stores a plurality of vehicle information received from the plurality of in-vehicle devices 100. The vehicle information stored in the database 220 includes battery information including the terminal voltage, charge / discharge current, and temperature of the battery 110 of each vehicle-mounted device 100, travel information including the travel distance and travel time of each vehicle, and each vehicle-mounted device 100. Power consumption of the battery 110, the number of times of charging by rapid charging, usage information of the battery 110 including the usage period of the battery 110, and the like. Further, unlike the in-vehicle device 100, the database 220 stores the plurality of pieces of vehicle information as history information accumulated over a long period (for example, several years). For example, the database 220 stores the charge / discharge current integrated value of the battery 110 and the total travel distance of the vehicle as the history information of the charge / discharge current value of the battery 110 and the travel distance of the vehicle.

  The center control device 230 acquires vehicle information from the plurality of in-vehicle devices 100 via the center communication device 210, and stores the acquired vehicle information in the database 220 in association with the in-vehicle device 100.

In response to a request from the in-vehicle device 100, the center control device 230 estimates the SOC of the battery 110 mounted in the in-vehicle device 100 as the second estimated value E _server . Here, in this embodiment, the battery charge / discharge is performed for each map indicating the correspondence between the battery terminal voltage (open voltage) and the SOC, the map for specifying the battery deterioration state, and the battery deterioration state. A map or the like indicating the correspondence between the current value, temperature, and terminal voltage is stored in the database 220. For example, the center device control device 230 uses battery 110 usage information such as the usage period and the number of times of charging of the battery 110, travel information such as the travel distance and travel region of the vehicle, and history such as the accumulated charge / discharge current value of the battery 110. Based on the information, the deterioration state of the battery 110 is specified, and a map showing the correspondence relationship between the charge / discharge current value of the battery 110, the temperature, and the voltage according to the specified deterioration state of the battery 110 is referred to. Calculate the terminal voltage (open voltage). Furthermore, the center control device 230 estimates the SOC of the battery 110 based on the terminal voltage (open voltage) of the battery 110 with reference to a map showing the correspondence between the battery terminal voltage (open voltage) and the SOC. be able to.

As described above, the information center 200 has many maps that include more vehicle information than the map related to the battery 110 included in the in-vehicle device 100. By referring to these maps, the information center 200 The SOC of the battery 110 can be estimated with high accuracy as the second estimated value E _server . The information center 200 stores a plurality of pieces of vehicle information collected from the plurality of in-vehicle devices 100 as history information in a span longer than the span in which the in-vehicle device 100 stores the vehicle information. By estimating the second estimated value E _server using information, the second estimated value E _server can be estimated with higher accuracy.

  Next, the battery capacity presentation process according to the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing battery capacity presentation processing according to the present embodiment. This battery capacity presentation process is performed at an arbitrary timing or at regular time intervals.

In step S101, vehicle information including battery information such as a terminal voltage, a charge / discharge current value, and temperature of the battery 110 is acquired by the vehicle information acquisition function of the in-vehicle control device 150. In step S102, the SOC of the battery 110 is estimated based on the vehicle information acquired in step S101 by the charge state estimation function of the in-vehicle controller 150. For example, in the present embodiment, the charge state estimation function is based on the current terminal voltage and temperature of the battery 110 with reference to a map indicating the correspondence relationship between the terminal voltage, temperature, and SOC of the battery 110 stored in advance. The SOC of the current battery 110 can be estimated as the first estimated value E _car .

In step S103, the scale reduction determination function of the in-vehicle control device 150 determines whether or not the first estimated value E _car estimated in step S102 is less than a predetermined first determination value. Here, the first determination value is a value for determining whether or not to reduce the scale indicating the remaining capacity R of the battery 110, and is provided for each scale. For example, in the example shown in FIG. 2, ten scales representing the remaining capacity R of the battery 110 are provided using ten liquid crystal segments, and a first determination value is provided for each of the ten scales. It has been.

  In the present embodiment, the 10th scale (first scale) corresponds to 90 to 100% SOC, and the 9th scale (second scale from the top) is 80 to 90%. It corresponds to the SOC. Similarly, other scales correspond to a certain range of SOC. In the present embodiment, the lower limit value of the SOC corresponding to each scale is set as the first determination value. For example, since the 10th scale (the top scale) corresponds to 90 to 100% SOC, the first determination value corresponding to the 10th scale is set to 90% which is the lower limit value. Has been. Similarly, a first determination value is set corresponding to each scale.

  The first determination value is not limited to the above example. For example, the first determination value may be larger than the lower limit value of the SOC corresponding to each scale, or may correspond to each scale. It is good also as a value smaller than the lower limit of SOC to perform.

In step S103, if it is determined that the first estimated value E _car estimated by the in-vehicle device 100 is less than the first determination value, whether or not to reduce the scale indicating the remaining capacity R of the battery 110 is determined. In order to make further determination, the process proceeds to step S104. On the other hand, when it is determined that the first estimated value E _car estimated by the in-vehicle device 100 is greater than or equal to the first determination value, the process returns to step S101, and the first estimated value E _car is less than the first determination value. Until it is determined, the processes of steps S101 to S103 are repeated at regular time intervals.

  In step S104, the information center 200 is requested to estimate the SOC by the scale reduction determination function of the in-vehicle control device 150. Specifically, the in-vehicle control device 150 transmits an SOC estimation request signal to the information center 200 via the in-vehicle communication device 140. As a result, the information center 200 receives a request signal for estimating the SOC from the in-vehicle device 100 (hereinafter also referred to as a requesting vehicle) that has made the request via the center communication device 210.

In step S105, the SOC of the battery 110 included in the requested vehicle is estimated as the second estimated value E _server by the center control device 230 of the information center 200 according to the request signal received in step S104. For example, in this embodiment, a plurality of maps indicating the relationship between each vehicle information and the battery SOC are stored in advance in the memory or database 220 of the center control device 230, and the center control device 230 stores these maps. By referencing, the SOC of the battery 110 included in the request vehicle can be estimated as the second estimated value E _server based on the vehicle information of the request vehicle. In the subsequent step S106, the center controller 230 transmits the second estimated value E _server estimated by the information center 200 in step S105 to the in-vehicle device 100.

In step S107, the first estimated value E _car estimated by the in-vehicle device 100 in step S102 and the second estimated value E _server estimated by the information center 200 in step S105 by the scale reduction determination function of the in-vehicle control device 150, A comparison is made. Specifically, when the second estimated value E _server estimated in the information center 200 is equal to or less than the first estimated value E _car estimated in the in-vehicle device 100, both the information center 200 and the in-vehicle device 100 Since it is estimated that the SOC of the battery 110 is lower than the first determination value, the scale reduction determination function determines that the scale representing the remaining capacity R of the battery 110 is decreased, and in step S108, the battery capacity The total 160 is displayed with a scale indicating the remaining capacity R of the battery 110 being reduced. As described above, when the first estimated value E _car and the second estimated value E _server are lower than the first determination value, the actual remaining capacity R of the battery 110 may be lower than the remaining capacity R indicated by the scale. Therefore, the remaining capacity R of the battery 110 can be appropriately presented to the driver by reducing the scale indicating the remaining capacity R. On the other hand, when the second estimated value E _server estimated in the information center 200 exceeds the first estimated value E _car estimated in the in-vehicle device 100, in order to further determine whether or not the scale needs to be reduced. Then, the process proceeds to step S109.

In step S109, whether the first estimated value E _car estimated in the in-vehicle device 100 and the second estimated value E _server estimated in the information center 200 are both equal to or smaller than the second determined value by the scale reduction determining function. Judgment is made. Here, the second determination value is a value lower than the first determination value, and is provided for each scale of the scale representing the remaining capacity R of the battery 110, similarly to the first determination value. For example, when the first determination value is set to the lower limit value of the SOC corresponding to each scale, for example, 90%, 80%, 70%, 60%,..., The second determination value is set to the first determination value. A value lower by 2% than the determination value, for example, 88%, 78%, 68%, 58%,... In the present embodiment, the second determination value is set to a value smaller than the first determination value. However, the present invention is not limited to this configuration. For example, the second determination value is set to the same value as the first determination value. It may be set.

In step S109, the first estimated value E _car estimated in the in-vehicle device 100 is equal to or less than the second determination value, and the second estimated value E _server estimated in the information center 200 is also equal to or less than the second determination value. In some cases, it can be determined that there is a high possibility that the current remaining capacity R of the battery 110 has reached a value corresponding to the next lower scale. It is determined that the scale indicating R needs to be reduced, and the process proceeds to step S108. In step S108, the scale indicating the remaining capacity R of the battery 110 is decreased by one.

On the other hand, when the first estimated value E _car estimated in the in-vehicle device 100 exceeds the second determination value, or the second estimated value E _server estimated in the information center 200 exceeds the second determination value. In this case, the scale reduction determination function determines that the current remaining capacity R of the battery 110 does not correspond to the next lower scale, and proceeds to step S110.

  In step S110, the next determination waiting time T is calculated by the scale reduction determination function. In the present embodiment, the battery capacity presentation process shown in FIG. 3 is periodically and repeatedly executed, but it is determined that the remaining capacity R of the battery 110 does not correspond to the next lower scale, and the battery 110 If the scale indicating the remaining capacity R is not reduced, the next battery capacity presentation processing is prohibited until the next determination waiting time T elapses. The battery capacity presentation process is performed.

すなわち、上記式（１）に示すように、第１推定値Ｅ_ｃａｒと第２推定値Ｅ_{ｓｅｒｖｅｒ}との差分の絶対値が５％以下である場合には、次回判断待ち時間Ｔを「２分」として算出し、第１推定値Ｅ_ｃａｒと第２推定値Ｅ_{ｓｅｒｖｅｒ}との差分の絶対値が５％よりも大きく、かつ、１０％以下である場合には、次回判断待ち時間Ｔを「５分」として算出し、第１推定値Ｅ_ｃａｒと第２推定値Ｅ_{ｓｅｒｖｅｒ}との差分の絶対値が１０％よりも大きい場合には、次回判断待ち時間Ｔを「１０分」として算出する。 Specifically, the scale reduction determination function _calculates the next determination waiting time T based on the absolute value of the difference between the first estimated value E _car and the second estimated value E _server as shown in the following formula (1). calculate.

That is, as shown in the above equation (1), when the absolute value of the difference between the first estimated value E _car and the second estimated value E _server is 5% or less, the next determination waiting time T is set to “2 minutes. When the absolute value of the difference between the first estimated value E _car and the second estimated value E _server is larger than 5% and not larger than 10%, the next determination waiting time T is set to “5”. When the absolute value of the difference between the first estimated value E _car and the second estimated value E _server is greater than 10%, the next determination waiting time T is calculated as “10 minutes”.

In step S111, it is determined whether or not the next determination waiting time T calculated in step S110 has elapsed by the scale reduction determination function. If the next determination waiting time T has not elapsed, the process waits in step S111 until the next determination waiting time T elapses. Thereby, when the difference between the first estimated value E _car and the second estimated value E _server is large and the reliability of the SOC is low, the communication frequency with the information center 200 and the scale of the remaining capacity R of the battery 110 are reduced. Therefore, the communication load and the processing load can be reduced. On the other hand, if the next determination waiting time T has elapsed, the battery capacity presentation process shown in FIG. 3 is terminated, and the process returns to step S101. Thereby, the battery capacity presentation process shown in FIG. 3 is executed again.

  As described above, the battery capacity presentation process according to the present embodiment is performed.

Next, a specific operation example of the battery capacity presentation process described above will be described with reference to FIGS. 4 to 7 show the first estimated value E _car that is the SOC estimated by the in-vehicle device 100, the second estimated value E _server that is the SOC estimated by the information center 200, the next determination waiting time T, and the battery. An example of the time transition of the scale indicating the remaining capacity R of the battery 110 displayed on the capacity meter 160 is shown. In the scene examples shown in FIGS. 4 to 7, a case where it is determined whether or not the scale representing the remaining capacity R of the battery 110 is reduced from “10” to “9” will be described as an example.

For example, in the scene example shown in FIG. 4, the first estimated value E _car that is the SOC of the battery 110 estimated by the in-vehicle device 100 in step S103 due to the discharge of the battery 110 corresponds to the scale “10”. It is determined that the value is lower than 1 determination value. Accordingly, in step S105, the SOC of the battery 110 is estimated as the second estimated value E _server by the information center 200. In step S107, the first estimated value E _car estimated by the in-vehicle device 100 and the second estimated value E _server estimated by the information center 200 are compared. In the scene example shown in FIG. 4, since the second estimated value E _server estimated by the information center 200 is equal to or less than the first estimated value E _car estimated by the in-vehicle device 100, the process proceeds to step S108, and the battery capacity meter At 160, the scale indicating the remaining capacity R of the battery 110 is displayed by decreasing from “10” to “9”. In this case, since the scale indicating the remaining capacity R of the battery 110 is decreased, the next determination waiting time T is not calculated.

In the example of the scene shown in FIG. 5, the first estimated value E _car estimated by the in-vehicle device 100 in step S103 corresponds to the scale “10” due to the discharge of the battery 110, as in the example of the scene shown in FIG. It is determined that the value is less than the first determination value. Thus, in step S105, the information center 200 estimates the second estimated value E _server , and in step S107, the first estimated value E _car and the second estimated value E _server are compared. Here, in the scene example shown in FIG. 5, since the second estimated value E _server estimated by the information center 200 is larger than the first estimated value E _car estimated by the in-vehicle device 100, the process proceeds to step S109. In step S109, the first estimated value E _car estimated in the in-vehicle device 100 is equal to or _smaller than the second determination value, and the second estimated value E _server estimated in the information center 200 is equal to or _smaller than the second determination value. It is determined that there is (step S109 = Yes), the process proceeds to step S108, and the battery capacity meter 160 displays a scale indicating the remaining capacity R of the battery 110 from “10” to “9”.

Further, in the scene example shown in FIG. 6, the process up to step S109 is the same as the scene example shown in FIG. However, in the scene example shown in FIG. 6, in step S109, the first estimated value E _car estimated in the in-vehicle device 100 and the second estimated value E _server estimated in the information center 200 are both larger than the second determination value. Therefore, the scale indicating the remaining capacity R of the battery 110 is not reduced, and the process proceeds to step S110. In step S110, the next determination waiting time T is calculated. In the example shown in FIG. 6, since the absolute value of the difference between the first estimated value E _car and the second estimated value E _server is 5% or less, the next determination waiting time T is 2 minutes based on the above equation (1). Set to In step S111, the process waits until two minutes of the set next determination waiting time T elapses, and after two minutes of the next determination time T elapses, the battery capacity presentation process shown in FIG. 3 is performed again.

Further, in the scene example shown in FIG. 7, the processes up to step S110 are the same as those in the scene example shown in FIG. However, in the scene example shown in FIG. 7, in step S110, it is determined that the absolute value of the difference between the first estimated value E _car and the second estimated value E _server is greater than 5% and less than or equal to 10%. Thereby, the next determination waiting time T is set to 5 minutes based on the above formula (1). Then, in step S111, the process waits until 5 minutes of the set next determination waiting time T elapses, and after 5 minutes of the next determination time T elapses, the battery capacity presentation process shown in FIG. 3 is performed again.

As described above, in the present embodiment, the first estimated value E _car that is the SOC of the battery 110 estimated in the in-vehicle device 100 and the second estimated value E _server that is the SOC of the battery 110 estimated in the information center 200. Based on the above, it is determined whether or not the scale representing the remaining capacity R of the battery 110 is to be reduced, so that the remaining capacity R of the battery 110 is based only on the SOC estimated in the in-vehicle device 100 as in the past. Compared with the case where it is determined whether or not to reduce the scale indicating the scale, the scale representing the remaining capacity R of the battery 110 can be decreased at an appropriate timing. That is, conventionally, since it is determined whether or not to reduce the scale representing the remaining capacity R of the battery 110 based only on the SOC estimated in the in-vehicle device 100, the estimated SOC error of the battery 110 is taken into consideration. In some cases, the scale indicating the remaining capacity R of the battery 110 is decreased at a timing earlier than the actual time. However, in this embodiment, the battery is based on the first estimated value E _car and the second estimated value E _server. Since it is possible to appropriately determine the SOC of 110, it is possible to reduce the scale indicating the remaining capacity of the battery 110 at an appropriate timing.

In addition, in the present embodiment, the information center 200 includes, in addition to the battery information of the own vehicle, travel information of the own vehicle, usage information of the battery 110 of the own vehicle, and general vehicle information and batteries of a plurality of vehicles. In consideration of the deterioration characteristics, the SOC of the battery 110 included in the target in-vehicle device 100 is estimated as the second estimated value E _server . Thereby, in this embodiment, in the information center 200, the 2nd estimated value E _server which is SOC of the battery 110 can be estimated with high precision, and this reduces the scale showing the remaining capacity R of the battery 110. It is possible to determine more appropriately whether or not. In the present embodiment, the information center 200 does not determine whether to reduce the scale indicating the remaining capacity of the battery 110 using only the second estimated value E _server estimated in the information center 200. The estimated second estimated value E _server and the first estimated value E _car estimated in the in-vehicle device 100 of the host vehicle are compared, and the scale representing the remaining capacity of the battery 110 is reduced based on the comparison result. By determining whether or not the scale representing the remaining capacity R of the battery 110 is to be decreased, it is possible to more appropriately determine whether or not the scale representing the remaining capacity of the battery 110 is to be decreased more appropriately. Can be determined.

  Furthermore, in this embodiment, when the scale of the remaining capacity R of the battery 110 is not reduced, the next determination waiting time T is calculated, and the remaining capacity R of the battery 110 is calculated until the calculated next determination waiting time T elapses. Judgment whether or not to reduce the scale to be displayed is prohibited. Accordingly, since it is possible to suppress the frequency of communication with the information server 200 and the frequency of determination as to whether or not to reduce the scale indicating the remaining capacity of the battery 110, the communication load with the information center 200 and the remaining capacity of the battery 110 can be suppressed. It is possible to reduce the processing load in determining whether to reduce the scale representing R.

In the present embodiment, the second estimated value E _server is not requested to the information center 200 until the first estimated value E _car estimated by the in-vehicle device 100 is less than the first determination value. The communication load between the in-vehicle device 100 and the information center 200 and the processing load of the information center 200 can be reduced. Furthermore, in this embodiment, since the storage capacity required for storing vehicle information can be suppressed by limiting the amount of vehicle information held by the in-vehicle device 100, the cost of the in-vehicle device 100 can be reduced. And space saving can be realized.

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

For example, in the above-described embodiment, the SOC (unit:%) of the battery 110 is estimated as the first estimated value E _car in the in-vehicle device 100, and the SOC (unit:%) of the battery 110 is calculated as the second in the information center 200. An example is shown in which the estimated value E _server is estimated and the first estimated value E _car and the second estimated value E _server are compared to determine whether or not to reduce the display value representing the remaining capacity R of the battery 110. However, the present invention is not limited to this configuration. For example, in the in-vehicle device 100, the remaining capacity R (unit: kWh) of the battery 110 is estimated as the first estimated value E _car , and the remaining capacity R ( unit: estimating a kWh) as the second estimate _{E server,} compared first estimate _{E car} and the second estimated value _{E server} It may be configured to determine whether or not to decrease the displayed values representing the remaining capacity R of the battery 110.

Moreover, the battery capacity presentation processing according to the above-described embodiment is an example, and is not limited to the processing shown in the flowchart of FIG. For example, in the above-described embodiment, when the second estimated value E _server estimated in the information center 200 exceeds the first estimated value E _car estimated in the in-vehicle device 100 in step S107 (step S107 = No). Furthermore, although the configuration for determining whether or not the scale representing the remaining capacity R of the battery 110 is reduced in step S109 is illustrated, the configuration is not limited to this configuration, and for example, the second estimation estimated in the information center 200 When the value E _server exceeds the remaining capacity F _car estimated in the in-vehicle device 100, it is possible to determine that the display value representing the remaining capacity R of the battery 110 is not decreased without performing the determination in step S109. Good. Moreover, it is good also as a structure which performs determination of step S109 instead of determination of step S107.

Furthermore, in embodiment mentioned above, although the structure which determines whether the scale showing the remaining capacity R of the battery 110 was reduced in the vehicle equipment 100 was illustrated, it is not limited to this structure, For example, in the information center 200 Further, it may be configured to determine whether or not the scale representing the remaining capacity R of the battery 110 is reduced. For example, the information center 200 receives the SOC of the battery 110 estimated in the in-vehicle device 100 as the first estimated value E _{car from the} in-vehicle device 100 and estimates the SOC of the battery 110 as the second estimated value E _server . Then, as described above, the information center 200 determines the remaining capacity of the battery 110 based on the first estimated value E _car estimated by the in-vehicle device 100 and the second estimated value E _server estimated by the information center 200. It is possible to determine whether or not to reduce the scale representing R and to transmit the determination result to the in-vehicle device 100. Or the information center 200 is good also as a structure which determines the scale showing the remaining capacity R of the battery 110 of the vehicle-mounted apparatus 100 based on the said determination result, and transmits the information of the determined scale to the vehicle-mounted apparatus 100. FIG. In these cases, the processing load on the in-vehicle device 100 can be reduced.

  In addition, in the above-described embodiment, the configuration in which the display value indicating the remaining capacity R of the battery 110 is displayed on the battery capacity meter 160 is illustrated. However, the present invention is not limited to this configuration. The remaining capacity may be output by voice.

  In the above-described embodiment, the display value representing the remaining capacity R of the battery 110 is obtained by comparing the SOC of the battery 110 estimated in the in-vehicle device 100 with the SOC of the battery 110 estimated in the information center 200. Although the configuration for determining whether or not to decrease is exemplified, the configuration is not limited to this configuration. For example, the average of the SOC of the battery 110 estimated in the in-vehicle device 100 and the SOC of the battery 110 estimated in the information center 200 It is good also as a structure which determines whether the display value which represents the remaining capacity R of the battery 110 is decreased by calculating a value and determining whether the calculated average value is below a 1st determination value.

  Note that the charging state estimation function of the in-vehicle control device 150 of the above-described embodiment is the estimation means of the present invention, the in-vehicle communication device 140 is the communication means of the present invention, and the battery capacity meter 160 is the presenting means of the present invention. The scale reduction determination function of the apparatus 150 is the determination means and control means of the present invention, the center communication device 210 is the reception means and transmission means of the present invention, the database 220 is the storage means of the present invention, and the center control apparatus 230 is the present invention. Correspond to the center estimation means.

DESCRIPTION OF SYMBOLS 100 ... In-vehicle apparatus 110 ... Battery 120 ... Sensor group 130 ... Vehicle controller 140 ... In-vehicle communication apparatus 150 ... In-vehicle control apparatus 160 ... Battery capacity meter 200 ... Information center 210 ... Center communication apparatus 220 ... Database 230 ... Center control apparatus

Claims (11)

Estimating means for estimating a value representing a state of charge of the battery as a first estimated value based on battery information of a battery mounted on the vehicle;
The vehicle information including the battery information is transmitted to an information center installed outside, and a value representing the state of charge of the battery estimated by the information center is calculated from the information center based on the vehicle information. A communication means for receiving the estimated value;
Presenting means for presenting a display value representing the remaining capacity of the battery to the user;
Determination means for determining whether or not to decrease the display value of the remaining capacity of the battery presented by the presentation means based on the first estimated value and the second estimated value;
Control means for causing the presenting means to decrease and present the display value of the remaining capacity of the battery when the determination means determines to decrease the display value of the remaining capacity of the battery. A battery capacity presentation device. The battery capacity presentation device according to claim 1,
The determination means includes
If the first estimated value is greater than or equal to a predetermined first threshold, it is determined not to decrease the display value of the remaining battery capacity presented by the presenting means;
When the first estimated value is less than the first threshold value, the communication means acquires the second estimated value from the information center, and based on the first estimated value and the second estimated value, A battery capacity presentation device for determining whether or not to decrease the display value of the remaining capacity of the battery presented by the presentation means. In the battery capacity presentation device according to claim 1 or 2,
If the second estimated value is less than or equal to the first estimated value as a result of comparing the first estimated value and the second estimated value, the determining means is the battery presented by the presenting means. It is determined that the display value of the remaining capacity is reduced. In the battery capacity presentation device according to any one of claims 1 to 3,
The determination unit displays a display value of the remaining capacity of the battery presented by the presentation unit when the first estimated value and the second estimated value are less than a second threshold value that is equal to or less than the first threshold value. A battery capacity presentation device that is determined to decrease. In the battery capacity presentation device according to any one of claims 1 to 4,
The determination means repeatedly determines whether or not to decrease the display value of the remaining capacity of the battery, and when it is determined not to decrease the display value of the remaining capacity of the battery, the first estimated value and the first 2 The larger the difference from the estimated value, the longer the waiting time until determining whether to decrease the display value of the remaining capacity of the battery in the next processing, and until the waiting time elapses, It is prohibited to determine whether or not to decrease the display value of the remaining capacity. In the battery capacity presentation device according to any one of claims 1 to 5,
The vehicle information further includes deterioration information regarding deterioration of the battery in addition to the battery information. The battery capacity presentation device according to claim 6,
The battery degradation information is characterized in that the battery deterioration information is information including at least one of a usage period of the battery and a charge / discharge current integrated value of the battery. In the battery capacity presentation device according to any one of claims 1 to 7,
The battery capacity presentation device, wherein the battery information is information including at least one of a voltage, a charge / discharge current value, and a temperature of the battery. A battery capacity presentation system comprising a plurality of battery capacity presentation devices according to any one of claims 1 to 8 and an information center capable of exchanging information with each other.
The information center
Receiving means for receiving the plurality of vehicle information from the plurality of battery capacity presentation devices;
Storage means for storing the plurality of vehicle information received from the plurality of battery capacity presentation devices;
Center estimation means for estimating, as the second estimated value, a value representing a state of charge of a battery included in a target battery capacity presentation device based on the plurality of vehicle information stored in the storage means;
A battery capacity presentation system comprising: transmission means for transmitting the second estimated value estimated by the center estimation means to the target battery capacity presentation device. An information center for collecting a plurality of vehicle information including battery information from a plurality of battery capacity presentation devices equipped with batteries,
First receiving means for receiving the plurality of vehicle information from the plurality of battery capacity presentation devices;
Storage means for storing the plurality of vehicle information received from the plurality of battery capacity presentation devices;
Second receiving means for receiving, from the battery capacity presentation device, a value representing the state of charge of the battery estimated in the target battery capacity presentation device as a first estimated value;
Center estimation means for estimating, as the second estimated value, a value representing a state of charge of a battery included in the target battery capacity presentation device based on the plurality of vehicle information stored in the storage means;
Determining means for determining, based on the first estimated value and the second estimated value, whether or not to decrease the display value of the remaining battery capacity presented to the user in the target battery capacity presenting device; ,
An information center comprising: a transmission unit configured to transmit a determination result by the determination unit to the target battery capacity presentation device. A battery capacity presentation method for presenting a display value representing a remaining battery capacity to a user,
A first estimated value that is a value representing a state of charge of the battery estimated based on battery information of the battery, and a state of charge of the battery estimated in an information center based on vehicle information including the battery information. Based on the second estimated value that is a value to represent, to determine whether to decrease the display value of the remaining capacity of the battery, and when it is determined to decrease the display value of the remaining capacity of the battery, A battery capacity presentation method, characterized in that a display value of a remaining battery capacity is reduced and presented to a user.

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