Battery monitoring program, recording medium, and battery monitoring system

Abstract

The battery monitoring program (P1) is a program for causing the processor (1) to implement a function for acquiring a fault symptom of the secondary battery (2) and a function for checking battery characteristics of the secondary battery (2) when the fault symptom of the secondary battery (2) is acquired. A battery monitoring system (100) for monitoring a secondary battery (2) is a system provided with an inspection unit (104) for inspecting battery characteristics of the secondary battery (2) when a fault sign of the secondary battery (2) is acquired.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority of Japanese Application No. 2022 - 180267 filed on November 10, 2022, and the entire content thereof is incorporated herein by reference. Technical field

[0003] The present disclosure relates to a technique for monitoring a battery. Background art

[0004] The following Patent Document 1 discloses a technique for managing a plurality of battery packs disposed at a device replacement station. This technique aims to adjust the replacement priority order of the plurality of battery packs. The battery pack management component related to this technique is configured to receive information representing at least one battery characteristic related to the battery pack from a server, select at least one battery pack based on the at least one battery characteristic, and reduce the replacement priority order of at least one selected battery pack based on the received information so that at least one of the selected battery packs is taken out later than the remaining battery packs.

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2019 - 122253

[0006] The battery pack includes at least one battery. A secondary battery can be used as this battery. The performance of the secondary battery deteriorates whether it is used or not. However, there is a concern that the performance of this secondary battery may deteriorate rapidly due to manufacturing deviations, the placement environment, etc. In contrast, the technique disclosed in Patent Document 1 is not a technique that can detect such signs of deterioration in advance. Summary of the invention

[0007] The present disclosure aims to provide a battery monitoring technique that can effectively prevent failures of secondary batteries.

[0008] One aspect of the present disclosure is a battery monitoring program

[0009] for causing a processor to implement a function of acquiring a failure sign of a secondary battery and a function of checking battery characteristics of the secondary battery when the failure sign of the secondary battery is acquired.

[0010] Another aspect of the present disclosure is a recording medium

[0011] on which the above - mentioned battery monitoring program is recorded in a readable manner.

[0012] Another aspect of the present disclosure is a battery monitoring system

[0013] which is a battery monitoring system for monitoring a secondary battery

[0014] An inspection unit that inspects the battery characteristics of the secondary battery when a failure symptom of the secondary battery is obtained.

[0015] According to each of the above methods, it is possible to prevent a failure of the secondary battery.

[0016] In addition, the reference numerals in parentheses described in the claims indicate the correspondence with the specific units described in the embodiments described later, and do not limit the technical scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Through the following detailed description with reference to the drawings, the above object and other objects, features, and advantages of the present disclosure become more apparent. The drawings are,

[0018] Figure 1 A block diagram showing the configuration of the battery monitoring system according to Embodiment 1,

[0019] Figure 2 A diagram showing a flowchart of battery monitoring control of the battery monitoring system according to Embodiment 1,

[0020] Figure 3 A diagram showing Figure 1 A schematic diagram of a plurality of pieces of monitoring data acquired by the monitoring data acquisition unit in

[0021] Figure 4 A diagram showing Figure 1 A schematic diagram of a feature amount calculated by the monitoring data acquisition unit in

[0022] Figure 5 A diagram showing Figure 4 A schematic diagram of a trend component of a partial correlation coefficient in

[0023] Figure 6 A diagram showing Figure 1 A schematic diagram of inspection data acquired by the inspection data acquisition unit in

[0024] Figure 7 A block diagram showing the configuration of the battery monitoring system according to Embodiment 2,

[0025] Figure 8 A block diagram showing the configuration of the battery monitoring system according to Embodiment 3,

[0026] Figure 9 A block diagram showing the configuration of the battery monitoring system according to Embodiment 4,

[0027] Figure 10 A block diagram showing the configuration of the battery monitoring system according to Embodiment 5,

[0028] Figure 11It is a block diagram showing the configuration of the battery monitoring system according to Embodiment 6.

[0029] Figure 12 It is a block diagram showing the configuration of the battery monitoring system according to Embodiment 7.

[0030] Figure 13 It is a block diagram showing the configuration of the battery monitoring system according to Embodiment 8.

[0031] Figure 14 It is a block diagram showing the configuration of the battery monitoring system according to Embodiment 9.

[0032] Figure 15 It is a block diagram showing the configuration of the battery monitoring system included in the display program. Specific Embodiments

[0033] Hereinafter, the battery monitoring technology related to the above-described embodiments will be described in detail with reference to the accompanying drawings.

[0034] (Embodiment 1)

[0035] As Figure 1 shown, the battery monitoring system 100 of Embodiment 1 is a system for monitoring a secondary battery 2 that constitutes a battery pack mounted on a vehicle 10 such as an electric vehicle or a hybrid vehicle. The secondary battery 2 is a battery pack formed by combining a plurality of battery cells. The secondary battery 2 and a BMU (Battery Management Unit) together form a so-called "battery pack", and the BMU includes a monitoring data acquisition unit 101 and a fault symptom detection unit 102 described later. In addition, the secondary battery 2 (battery pack) may be a replaceable (cartridge type) battery mounted on the vehicle 10 in a removable manner, or may be a fixed battery mounted on the vehicle 10 in a non-removable manner.

[0036] The battery monitoring system 100 includes, as its constituent elements, a monitoring data acquisition unit 101, a fault symptom detection unit 102, an inspection data acquisition unit 103, an inspection unit 104, a usability determination unit 105, a continued use display unit 106, and a replacement display unit 107. The functions of these constituent elements are executed by processors 1 (processors 1A, 1B, 1C) respectively provided on the vehicle 10 side, in the charging station 20, and in the battery service center 30.

[0037] The charging station 20 is a device configured to be able to perform at least the charging operation of the secondary battery 2 mounted on the vehicle 10. In this charging station 20, the charging operation can be performed on the secondary battery 2 while it is mounted on the vehicle 10, or the charging operation can also be performed on the secondary battery 2 removed from the vehicle 10. In addition, the charged secondary battery 2 can be reused in the vehicle 10 again, or can be used in other vehicles, or can be reused at a secondary utilization destination different from the vehicle 10.

[0038] The battery service center 30 is a device for performing the operation of receiving a faulty secondary battery 2 and replacing it with a new secondary battery. It should be noted that the battery service center 30 can be attached to the charging station 20, or can be set at a location far from the charging station 20.

[0039] The functions of the respective components of the battery monitoring system 100 are realized by the battery monitoring program P1. The battery monitoring program P1 is a program for causing the processor 1 to at least realize the function of acquiring the monitoring data X of the secondary battery 2, the function of detecting the fault symptom of the secondary battery 2 based on the acquired monitoring data X, the function of checking the battery characteristics of the secondary battery 2 when the fault symptom of the secondary battery 2 is acquired, and the function of determining whether the secondary battery 2 can be used based on the inspection result R of the battery characteristics. The battery monitoring program P1 is preferably recorded on the recording medium 50 in a readable manner as needed. Here, the so-called "recording" can also be referred to as "storage". As the recording medium 50, various recording media such as a memory type, a disk type, and a magnetic tape type can be used.

[0040] In addition, in the drawings, the recording medium 50 is described independently of the vehicle 10, the charging station 20, the battery service center 30, and the battery monitoring server 40 described later. However, the recording medium 50 is included in at least one of these respective components. In the drawings, the recording medium 50 is described independently of the above-mentioned respective components in order to avoid cumbersome expression or limited display of the recording position of the battery monitoring program P1.

[0041] The "processor 1" mentioned here broadly includes a processing device that undertakes operations or conversions of data, execution of programs, control of other devices, etc. among the components of a computer. Typically, the processor 1 is constituted by a CPU (Central Processing Unit: central processing device) responsible for the overall control of the computer, or an MPU (Micro Processing unit: microprocessor) that integrates a part of the functions of the CPU.

[0042] In this method, the functions of the monitoring data acquisition unit 101 and the fault symptom detection unit 102 are executed by the processor 1A of the BMU mounted in the above battery pack. The functions of the inspection data acquisition unit 103, the inspection unit 104, the usability determination unit 105, and the continued use display unit 106 are executed by the processor 1B of the management server (not shown) mounted in the charging station 20. The function of the replacement display unit 107 is executed by the processor 1C of the management server (not shown) mounted in the battery service center 30.

[0043] In addition, regarding how to allocate the multiple components (functional elements) of the battery monitoring system 100 to the vehicle 10, the charging station 20, and the battery service center 30, it is not limited to Figure 1 the allocation and can be appropriately changed as needed.

[0044] The monitoring data acquisition unit 101 has the function of acquiring the monitoring data X of the secondary battery 2. The monitoring data X can be either data directly sensed from the secondary battery 2 or data obtained by converting the sensed data into history information through a control unit or the like. As the monitoring data X, for example, time series data such as voltage, charge and discharge current, SOC (State Of Charge), battery temperature, ambient temperature around the battery, cumulative charge time, cumulative discharge time, and cumulative current can be used. In addition, as the monitoring data X of the battery pack, for example, time series data such as the total voltage of the battery pack, the maximum and / or minimum voltages of the secondary batteries in the battery pack, battery temperature, and SOC can be used. The "voltage" mentioned here includes the open-circuit voltage and the closed-circuit voltage. The monitoring data acquisition unit 101 can be a sensor or the like capable of detecting the monitoring data X to be acquired. For example, it can be a voltage sensor, a current sensor, a temperature sensor, etc., and calculate and acquire the SOC based on these values.

[0045] The failure symptom detection unit 102 has a function of detecting a failure symptom of the secondary battery 2 based on the monitoring data X acquired by the monitoring data acquisition unit 101. The inspection data acquisition unit 103 has a function of acquiring inspection data Y for inspecting the battery characteristics of the secondary battery 2. The inspection data Y can be either data directly sensed from the secondary battery 2 or data obtained by converting the sensed data into history information through a control unit or the like. As the inspection data Y, for example, data included in the charge and discharge results of the secondary battery 2 under specified conditions (constant current charging and discharging, pulse charging and pulse discharging, etc.) is preferably used. Specified charging is performed at the charging station 20, or the charge and discharge results obtained under specified conditions during the operation of the secondary battery 2 are extracted and used. In addition, a constant current mode of current is easily obtained during operation at a stable speed on a highway or the like, temperature adjustment during parking, power supply to electrical equipment, and use in a V2H (a system called "Vehicle to Home") or the like. Also, pulse charging and pulse discharging are easily obtained during regeneration during braking and output during starting.

[0046] The inspection unit 104 has a function of inspecting the battery characteristics of the secondary battery 2 on the condition that a failure symptom of the secondary battery 2 has been acquired from the vehicle 10 side (that is, the failure symptom detection unit 102 has detected a failure symptom of the secondary battery 2). As the "battery characteristics" mentioned here, typically, the capacity, internal resistance, charge and discharge efficiency, self-discharge amount, cycle life, etc. of the secondary battery 2 can be cited. The usability determination unit 105 has a function of determining whether the secondary battery 2 can be used based on the inspection result R of the battery characteristics by the inspection unit 104 and notifying the determination results Ta and Tb to the continue use display unit 106 and the replacement display unit 107.

[0047] The continue use display unit 106 has a function of displaying the determination result Ta notified from the usability determination unit 105. The determination result Ta is a determination result indicating that the secondary battery 2 can continue to be used. The replacement display unit 107 has a function of displaying the determination result Tb notified from the usability determination unit 105. The determination result Tb is a determination result indicating that the secondary battery 2 cannot continue to be used and needs to be replaced. At this time, it is preferable that the determination results Ta and Tb are displayed on the screens of various devices such as a desktop or notebook personal computer (PC), a tablet terminal, and a mobile terminal.

[0048] Next, Figures 2 to 5 the battery monitoring control of the battery monitoring system 100 will be described. This battery monitoring control is achieved by sequentially executing Figure 2 each of steps S1 to S8. In addition, one or more steps can be added to these steps as needed, or multiple steps can be appropriately combined.

[0049] As shown Figure 2 in FIG. 1, step S1 is a step of obtaining the monitoring data X of the secondary battery 2 by the monitoring data acquisition unit 101 (refer to Figure 1 FIG. 1). According to this step S1, the monitoring data X of the secondary battery 2 is obtained. Step S2 is a step of monitoring the data correlation of the monitoring data X obtained in step S1 by the fault symptom detection unit 102 (refer to Figure 1 FIG. 1). According to this step S2, the data correlation of each of the monitoring data X is monitored. Step S3 is a step of determining whether there is a fault symptom of the secondary battery 2 based on the monitoring result of step S2 by the fault symptom detection unit 102 (refer to Figure 1 FIG. 1). In step S3, when it is determined that there is a fault symptom of the secondary battery 2 (in the case of "Yes" in step S3), the process proceeds to step S4, otherwise (in the case of "No" in step S3)) returns to step S1.

[0050] Here, with reference to Figures 3 to 6 FIG. 1, a specific example of the processing of steps S1 to S3 will be described.

[0051] As shown Figure 3 in FIG. 2, in step S1, characteristic quantities of the secondary battery 2 are calculated using a plurality of types of monitoring data X (six types of monitoring data X1 to X6 in Figure 3 FIG. 2). This characteristic quantity can be, for example, the correlation coefficient between variables of the monitoring data X. In this method, as this correlation coefficient, the partial correlation coefficient between the explanatory variable and the target variable is calculated based on the components of the covariance inverse matrix of the monitoring data X. The covariance inverse matrix can be calculated by performing sparse regularization on a plurality of types of monitoring data X as variables. In addition, the monitoring data X is not limited to six types.

[0052] In this method, first, the monitoring data X1 to X6 obtained in the first period A are used as variables for sparse regularization, and the partial correlation coefficient matrix is calculated as the covariance inverse matrix. Then, the partial correlation coefficient (refer to Figure 4 FIG. 2) as a specific component of this partial correlation coefficient matrix is calculated as the characteristic quantity. As shown Figure 4 in FIG. 3, the partial correlation coefficient as the characteristic quantity changes over time.

[0053] In addition, the "sparse regularization" and "partial correlation coefficient" mentioned here are generally known terms defined in multivariate analysis, which is a method of discovering the correlation between variables by collecting similar variables from many variables. For the details of this multivariate analysis, for example, "fault diagnosis" disclosed in Japanese Unexamined Patent Application Publication No. 2019-152656, "influence amount estimation processing" disclosed in Japanese Unexamined Patent Application Publication No. 2020-135591, etc. can be referred to.

[0054] Next, in step S2, as shown in Figure 5 , as the system variation as a feature quantity, through important factor decomposition in time series analysis, or by extracting a trend component through smoothing processing. Important factor decomposition in time series analysis can be performed by known methods. In addition, as the smoothing processing, a moving average that calculates the average of the latest feature quantities, or a Kalman smoothing that extracts the past system variation based on the feature quantities up to the present can be adopted. In addition, the period of the feature quantity used to extract the system variation is not particularly limited.

[0055] Regarding the period of variation of the feature quantity, for example, when monitoring by paying attention to the seasonal changes in a year, the variation component with a period of one year can be regarded as the seasonal variation component, and the variation component with a period longer than one year can be regarded as the long-period trend component. In addition, the variation component with a period shorter than the seasonal variation can be defined as a random variation. In addition, when monitoring by paying attention to the change in the usage method in a week, the variation component with a period of one week can be regarded as the weekly variation component, the variation component with a period longer than one week can be regarded as the long-period trend component, and the variation component with a period shorter than one week can be defined as a random variation.

[0056] Here, it is known that the signs of the failure of the secondary battery 2 appear as a long-period trend component in the partial correlation coefficient. Therefore, by extracting the trend component from the partial correlation coefficient as the system variation, the long-period trend component reflecting the abnormality of the secondary battery 2 can be made to appear.

[0057] Therefore, in step S3, it is determined whether the system variation of the trend component in Figure 5 has deviated from the specified reference range C (that is, whether correlation breakdown is observed). In this method, the reference range C is set in advance based on the variation range of the system variation in the basic evaluation when designing the secondary battery 2. When it is determined that the system variation has deviated from the reference range C, it is determined as "having a failure sign" in step S3. As shown in Figure 5 , at time t1, the trend component as the system variation has deviated from the reference range C, and it is determined that there is a failure sign of the secondary battery 2.

[0058] In addition, for example, by referring to the battery monitoring system and control method disclosed in Japanese Patent Laid-Open No. 2021-135114, the details of the processing of steps S1 to S3 of this method are clarified.

[0059] As shown in Figure 2 , step S4 is performed by the inspection data acquisition unit 103 (refer to Figure 1Step of setting conditions for obtaining inspection data Y of secondary battery 2. According to this step S4, conditions for obtaining inspection data Y of secondary battery 2 are set. As the obtaining conditions, for example, the obtaining cycle of inspection data Y, the obtaining items of inspection data Y, the number of obtained (number of obtaining units, etc.), the sending cycle of the obtained inspection data Y to the inspection unit 104, etc. can be cited. In addition, when using pre-set obtaining conditions, step S4 can be omitted.

[0060] Preferably, the above obtaining conditions are conditions that can send more detailed inspection data Y to the inspection unit 104 compared to normal driving of the vehicle 10. For example, this condition is achieved by shortening the obtaining cycle of inspection data Y, or increasing the obtaining items or the number of obtained of inspection data Y, or shortening the sending cycle of inspection data Y to the inspection unit 104. Thereby, the battery characteristics of secondary battery 2 can be inspected in detail by the inspection unit 104. For example, when the data included in the inspection data Y is voltage, only the upper limit voltage and the lower limit voltage of secondary battery 2 are used in control during normal driving, while the number of obtained data can be increased by obtaining the voltage change values of all cells of secondary battery 2. Similarly, when the data included in the inspection data Y is temperature, only the upper limit temperature and the lower limit temperature of secondary battery 2 are used in control during normal driving, while the number of obtained data can be increased by obtaining the temperature change values of all cells of secondary battery 2.

[0061] Step S5 is the step of obtaining inspection data Y of secondary battery 2 by the inspection data obtaining unit 103 (refer to Figure 1 ). As shown Figure 6 , in step S5 of this mode, the case of obtaining the charge-discharge result of secondary battery 2 as inspection data Y is exemplified. Preferably, the charge-discharge result is the charge-discharge result of constant current charging and discharging of secondary battery 2, and a discharge period is formed after a rest period is separated during the charging period. In addition, the charge-discharge result is an exemplified result and is not limited to this charge-discharge result. For example, it can also be the charge-discharge result obtained by a charge-discharge mode of repeatedly pulsing while slowly changing the current.

[0062] Figure 2 Step S6 is the step of performing a detailed inspection of the battery characteristics of secondary battery 2 by the inspection unit 104 (refer to Figure 1 ) based on the inspection data Y obtained in step S5. According to this step S6, a detailed inspection of the battery characteristics of secondary battery 2 is performed. When obtaining the charge-discharge result of secondary battery 2 as inspection data Y, based on the obtained charge-discharge result, for example, battery characteristics such as the capacity, internal resistance, charge-discharge efficiency, self-discharge amount, cycle life, etc. of secondary battery 2 are inspected.

[0063] In addition, in this method, since the inspection unit 104 is provided in the charging station 20 (refer to Figure 1 ) to execute step S6, there is an effect that a charge / discharge mode for operating the inspection data Y can be set, and a detailed inspection can be executed with better accuracy. In addition, it is effective for the correction work and update work of the inspection logic for efficiently performing a detailed inspection by the charging station 20.

[0064] Step S7 is a step of determining whether the secondary battery 2 can be used by using the usability determination unit 105 (refer to Figure 1 ) following step S6. In this step S7, a threshold value is set for the result of the detailed inspection in step S6, and based on this threshold value, it is determined whether the secondary battery 2 can be used. At this time, the threshold value can be a preset threshold value, or alternatively, a threshold value updated by the system administrator during use. According to this step S7, it is determined whether the secondary battery 2 is in a state where it can continue to be used or in a state where it cannot continue to be used and needs to be replaced.

[0065] Step S8 is a step of displaying the determination result of step S7 by using the continued use display unit 106 and the replacement display unit 107 (refer to Figure 1 ). According to this step S8, a determination result Ta indicating that the secondary battery 2 is in a state where it can continue to be used is displayed on the continued use display unit 106. In this method, since the continued use display unit 106 is provided in the charging station 20, when the battery pack including the secondary battery 2 is replaceable, the determination result Ta of the rented battery pack can be confirmed at the charging station 20. In addition, according to step S8, a determination result Tb indicating that the secondary battery 2 is in a state where it cannot continue to be used and needs to be replaced is displayed on the replacement display unit 107. In this method, since the replacement display unit 107 is provided in the battery service center 30, after the determination result Tb is confirmed in the battery service center 30, it is possible to quickly move to the preparation work for replacing the secondary battery 2, and the waiting time for replacing the secondary battery 2 can be shortened. As a result, the efficiency of the maintenance work of the secondary battery 2 can be achieved.

[0066] According to Embodiment 1, the following effects are achieved.

[0067] In Embodiment 1, when a failure symptom of the secondary battery 2 is acquired, a process of inspecting the battery characteristics of the secondary battery 2 is executed. Therefore, it is possible to prevent the secondary battery 2 from failing. For example, when there is a sign of a sharp performance deterioration in which the secondary battery 2 is likely to fail, by performing a detailed inspection of the secondary battery with this failure symptom, it is possible to prevent the secondary battery 2 from failing during use.

[0068] In addition, in Embodiment 1, the battery characteristics of the secondary battery 2 are checked only when a failure symptom of the secondary battery 2 is acquired. Therefore, unnecessary checks such as regular checks can be omitted, and accordingly, the operating efficiency of the secondary battery 2 can be improved.

[0069] In addition, in Embodiment 1, based on the inspection result R of the battery characteristics of the secondary battery 2, it is determined whether the secondary battery 2 can be used. Therefore, the determination accuracy of whether the secondary battery 2 can be used can be improved.

[0070] Furthermore, in Embodiment 1, when it is determined by the failure symptom detection unit 102 (step S3) that the secondary battery 2 has a failure symptom, report information may be displayed on a display unit (not shown) on the vehicle 10 side. As the "report information" mentioned here, for example, a failure symptom notification indicating that the secondary battery 2 has a failure symptom, a return promotion notification urging the return of the secondary battery 2, etc. can be cited. Thereby, a passenger who has confirmed the report information acts in such a way as to move the vehicle 10 to a charging station 20 or the like. As a result, the risk of a failure of the secondary battery 2 occurring during the running of the vehicle 10 can be reduced.

[0071] Hereinafter, other modes related to the above-described Embodiment 1 will be described with reference to the drawings. In other modes, the same reference numerals are assigned to elements identical to those of the above-described Embodiment 1, and the description of the same elements is omitted.

[0072] (Embodiment 2)

[0073] As Figure 7 shown, the battery monitoring system 200 of Embodiment 2 is different from the battery monitoring system 100 of Embodiment 1 in that the failure symptom detection unit 102 is provided at the charging station 20 instead of the battery pack on the vehicle 10 side. In this battery monitoring system 200, the monitoring data X acquired by the monitoring data acquisition unit 101 can be temporarily stored by the data storage function of the battery pack provided on the vehicle 10 side and then output to the charging station 20 side when the vehicle 10 or the battery pack arrives at the charging station 20, or can be always output to the charging station 20 side through the data transmission and reception function between the vehicle 10 side and the charging station 20 side. The functions of the respective components of the battery monitoring system 200 are realized by the battery monitoring program P2. This battery monitoring program P2 is a program for causing the processor 1 (processors 1A, 1B, 1C) to realize the same functions as the battery monitoring program P1 of Embodiment 1. Preferably, this battery monitoring program P2 is recorded on the recording medium 50 in a readable manner as needed.

[0074] Other configurations and controls are the same as those of Embodiment 1.

[0075] According to Embodiment 2, it is possible to perform both the process of detecting a failure symptom of the secondary battery 2 based on the monitoring data X and the process of examining in detail the battery characteristics of the secondary battery 2 based on the inspection data Y in the charging station 20. In this case, it is effective to efficiently perform the correction operation and the update operation of the detection logic for the failure symptom and the correction operation and the update operation of the inspection logic for the detailed inspection in the charging station 20. In addition, according to Embodiment 2, by moving the function of the failure symptom detection unit 102 to the charging station 20 side, the arithmetic load of the BMU in the battery pack can be reduced.

[0076] In addition, it has the same effects as Embodiment 1.

[0077] (Embodiment 3)

[0078] As Figure 8 shown, the battery monitoring system 300 of Embodiment 3 is different from the battery monitoring system 100 of Embodiment 1 in that the inspection data acquisition unit 103 and the inspection unit 104 are provided on the battery pack on the vehicle 10 side instead of the charging station 20. The functions of the respective components of the battery monitoring system 300 are realized by the battery monitoring program P3. This battery monitoring program P3 is a program for causing the processor 1 (processors 1A, 1B, 1C) to realize the same functions as the battery monitoring program P1 of Embodiment 1. Preferably, this battery monitoring program P3 is recorded on the recording medium 50 in a readable manner as needed.

[0079] Other configurations and controls are the same as those of Embodiment 1.

[0080] According to Embodiment 3, it is possible to perform both the process of detecting a failure symptom of the secondary battery 2 based on the monitoring data X and the process of examining in detail the battery characteristics of the secondary battery 2 based on the inspection data Y in the vehicle 10. In this case, it is effective to efficiently perform the correction operation and the update operation of the detection logic for the failure symptom and the correction operation and the update operation of the inspection logic for the detailed inspection in the vehicle 10. In addition, according to Embodiment 3, by moving the functions of the inspection data acquisition unit 103 and the inspection unit 104 to the battery pack on the vehicle 10 side, it is possible to quickly move to the process of performing a detailed inspection after detecting a failure symptom of the secondary battery 2.

[0081] In addition, it has the same effects as Embodiment 1.

[0082] (Embodiment 4)

[0083] As Figure 9As shown, the battery monitoring system 400 of Embodiment 4 is different from the battery monitoring system 100 of Embodiment 1 in that the fault symptom detection unit 102 is provided in the battery monitoring server 40 instead of the battery pack on the vehicle 10 side. The battery monitoring server 40 is a device for providing a monitoring service for the secondary battery 2. In this battery monitoring system 400, first, if a fault symptom is detected by the fault symptom detection unit 102 on the battery monitoring server 40 side, this situation is notified to the charging station 20 side. Subsequently, when the vehicle 10 or the battery pack arrives at the charging station 20, the inspection data acquisition unit 103 on the charging station 20 side acquires the inspection data Y. The function of the fault symptom detection unit 102 is executed by the processor 1D mounted on the battery monitoring server 40. In addition, the battery monitoring server 40 can be attached to either the charging station 20 or the battery service center 30, or can be set at a position far from the charging station 20 and the battery service center 30. The functions of the respective components of the battery monitoring system 400 are realized by the battery monitoring program P4. The battery monitoring program P4 is a program for causing the processors 1 (processors 1A, 1B, 1C, 1D) respectively provided on the battery pack on the vehicle 10 side, the charging station 20, the battery service center 30, and the battery monitoring server 40 to realize the same functions as the battery monitoring program P1 of Embodiment 1. Preferably, the battery monitoring program P4 is recorded on the recording medium 50 in a readable manner as needed.

[0084] Other configurations and controls are the same as those of Embodiment 1.

[0085] According to Embodiment 4, it is possible to perform the process of detecting the fault symptom of the secondary battery 2 based on the monitoring data X in the battery monitoring server 40. In this case, it is effective to correct and update the detection logic of the fault symptom efficiently in the battery monitoring server 40.

[0086] In addition, it has the same effects as those of Embodiment 1.

[0087] (Embodiment 5)

[0088] As Figure 10 shown, the battery monitoring system 500 of Embodiment 5 is different from the battery monitoring system 400 of Embodiment 4 in that the inspection data acquisition unit 103 is provided in the battery pack on the vehicle 10 side instead of the charging station 20, and the inspection unit 104 is provided in the battery monitoring server 40 instead of the charging station 20. The functions of the respective components of the battery monitoring system 500 are realized by the battery monitoring program P5. The battery monitoring program P5 is a program for causing the processors 1 (processors 1A, 1B, 1C, 1D) to realize the same functions as the battery monitoring program P4 of Embodiment 4. Preferably, the battery monitoring program P5 is recorded on the recording medium 50 in a readable manner as needed.

[0089] Other configurations, controls, and implementation manners are the same as those in Embodiment 4.

[0090] According to Embodiment 5, it is possible to perform both the process of detecting a failure symptom of the secondary battery 2 based on the monitoring data X and the process of detailed inspection of the battery characteristics of the secondary battery 2 based on the inspection data Y by the battery monitoring server 40. In this case, it is effective for the correction operation and update operation of the detection logic for failure symptoms and the correction operation and update operation of the inspection logic for detailed inspection to be efficiently performed in the battery monitoring server 40.

[0091] In addition, it has the same effects as those in Embodiment 4.

[0092] Furthermore, as a modification example particularly related to the battery monitoring system 500 of Embodiment 5, it is possible to adopt a battery monitoring system in which an availability determination unit 105 is provided in the battery monitoring server 40.

[0093] (Embodiment 6)

[0094] As Figure 11 shown, the battery monitoring system 600 of Embodiment 6 is different from the battery monitoring system 500 of Embodiment 5 in that the inspection data acquisition unit 103 is provided at the charging station 20 instead of the battery pack on the vehicle 10 side. The functions of the respective components of the battery monitoring system 600 are realized by the battery monitoring program P6. This battery monitoring program P6 is a program for causing the processor 1 (processors 1A, 1B, 1C, 1D) to realize the same functions as the battery monitoring program P5 of Embodiment 5. Preferably, this battery monitoring program P6 is recorded on the recording medium 50 in a readable manner as needed.

[0095] Other configurations, controls, and implementation manners are the same as those in Embodiment 5.

[0096] According to Embodiment 6, it is possible to perform the process of acquiring the inspection data Y at the charging station 20. In this case, since it is possible to obtain a desired charge-discharge pattern at the charging station 20, it is effective for improving the inspection accuracy. In addition, it is effective for the correction operation and update operation of the acquisition conditions of the inspection data Y to be efficiently performed at the charging station 20.

[0097] In addition, it has the same effects as those in Embodiment 5.

[0098] (Embodiment 7)

[0099] As Figure 12As shown, the battery monitoring system 700 of Embodiment 7 is different from the battery monitoring system 600 of Embodiment 6 in that the inspection unit 104 is provided at the charging station 20 instead of the battery monitoring server 40, and a temporary ordering unit 108 and a formal ordering unit 109 are newly provided at the battery service center 30. The functions of the respective components of the battery monitoring system 700 are realized by the battery monitoring program P7. This battery monitoring program P7 is a program for causing the processor 1 (processors 1A, 1B, 1C, 1D) to realize, in addition to the same functions as the battery monitoring program P6 of Embodiment 6, the function of instructing the temporary ordering of a replacement secondary battery for replacing the secondary battery 2 when a fault symptom of the secondary battery 2 is acquired, and the function of instructing the formal ordering of a replacement secondary battery when it is determined based on the inspection result R of the battery characteristics by the useability determination unit 105 that the secondary battery 2 cannot be used. Preferably, this battery monitoring program P7 is recorded on the recording medium 50 in a readable manner as needed.

[0100] The temporary ordering unit 108 has the function of instructing the temporary ordering of a replacement secondary battery for replacing the secondary battery 2 when the fault symptom detection unit 102 acquires a fault symptom of the secondary battery 2. Thereby, the replacement secondary battery is temporarily ordered. The formal ordering unit 109 has the function of instructing the formal ordering of a replacement secondary battery on the condition that the determination result Tb is received, that is, when it is determined by the useability determination unit 105 based on the inspection result R of the battery characteristics by the inspection unit 104 that the secondary battery 2 cannot be used. Thereby, the replacement secondary battery that has been temporarily ordered is formally ordered. In addition, the formal ordering unit 109 is configured to have the function of causing the determination result Tb of the useability determination unit 105 to be displayed on the replacement display unit 107.

[0101] Other configurations and controls are the same as those of Embodiment 6.

[0102] According to Embodiment 7, after the secondary battery 2 is temporarily ordered based on the inspection result R of the battery characteristics by the inspection unit 104, the temporary ordering of the secondary battery 2 is switched to a formal and actual ordering at the moment when the determination result Tb of the formal ordering unit 109 is received. Thereby, at the battery service center 30, in addition to being able to quickly move on to the preparation work for replacing the secondary battery 2, the waiting time for the delivery of the secondary battery 2 can also be shortened. As a result, the efficiency of the maintenance work of the secondary battery 2 can be achieved.

[0103] In addition, the same effects as those of Embodiment 6 are achieved.

[0104] (Embodiment 8)

[0105] As Figure 13As shown, the battery monitoring system 800 of Embodiment 8 is different from the battery monitoring system 100 of Embodiment 1 in that the failure symptom detection unit 102 and the inspection data acquisition unit 103 are provided on the battery pack on the vehicle 10 side instead of the charging station 20, and a new setting instruction output unit 110 is newly provided on the battery pack on the vehicle 10 side. The functions of the respective components of the battery monitoring system 800 are realized by the battery monitoring program P8. This battery monitoring program P8 is a program for causing the processor 1 (processors 1A, 1B, 1C) to realize, in addition to the same functions as the battery monitoring program P1 of Embodiment 1, the function of outputting a use restriction instruction Sa to the battery control unit 3 when a failure symptom of the secondary battery 2 is acquired, and the function of outputting a use restriction release instruction Sb to the battery control unit 3 when the secondary battery 2 is normal based on the inspection result R of the battery characteristics. Preferably, this battery monitoring program P8 is recorded on the recording medium 50 in a readable manner as needed.

[0106] The instruction output unit 110 has both the function of outputting a use restriction instruction Sa to the battery control unit 3 when the failure symptom detection unit 102 acquires a failure symptom of the secondary battery 2, and the function of outputting a use restriction release instruction Sb to the battery control unit 3 when the secondary battery 2 is normal based on the inspection result R of the battery characteristics by the inspection unit 104. The battery control unit 3 controls the secondary battery 2 to impose a use restriction on the normal control by receiving the use restriction instruction Sa from the instruction output unit 110. On the other hand, the battery control unit 3 performs normal control with the use restriction of the secondary battery 2 released by receiving the use restriction release instruction Sb from the instruction output unit 110. The "use restriction" mentioned here includes restricting input / output power, restricting the upper and lower voltage ranges, improving battery temperature regulation performance, and implementing control in a manner that does not allow the deterioration of the battery to progress. In addition, the battery control unit 3 can either share the battery control unit originally provided for the secondary battery 2, or can be dedicatedly provided for the instruction output unit 110.

[0107] Other configurations and controls are the same as those of Embodiment 1.

[0108] According to Embodiment 8, when there is a failure symptom of the secondary battery 2, by imposing a use restriction on the secondary battery 2, the risk of the secondary battery 2 failing during the driving of the vehicle 10 can be reduced. In addition, when it is confirmed as a result of subsequent detailed inspection that the secondary battery 2 is actually normal, the performance during the driving of the vehicle 10 can be restored by releasing the use restriction imposed on the secondary battery 2. Therefore, it is possible to perform control with high convenience for preventing the failure of the secondary battery 2 during the driving of the vehicle 10.

[0109] In addition, it has the same effects as those of Embodiment 1.

[0110] (Embodiment 9)

[0111] As Figure 14 shown, the battery monitoring system 900 of Embodiment 9 is different from the battery monitoring system 100 of Embodiment 1 in that a return notification unit 111 is newly provided in the battery pack on the vehicle 10 side. The functions of the respective components of the battery monitoring system 900 are realized by the battery monitoring program P9. This battery monitoring program P9 is a program for causing the processor 1 (processors 1A, 1B, 1C) to realize, in addition to the same functions as the battery monitoring program P1 of Embodiment 1, a function of promoting the return of the secondary battery 2 when a fault symptom of the secondary battery 2 is acquired, and a function of withdrawing the return promotion notification when the secondary battery 2 is normal based on the inspection result R of the battery characteristics. Preferably, this battery monitoring program P9 is recorded on the recording medium 50 in a readable manner as needed.

[0112] The return notification unit 111 has both a function of promoting the return of the secondary battery 2 when the fault symptom detection unit 102 acquires a fault symptom of the secondary battery 2, and a function of withdrawing the return promotion notification when the secondary battery 2 is normal based on the inspection result R of the battery characteristics by the inspection unit 104. When the battery pack including the secondary battery 2 is of a replaceable type, the return notification unit 111 is preferably provided in the battery pack itself. When the replaceable battery pack is in a vehicle-mounted state, it is desirable to display a signal from the return notification unit 111 on the vehicle 10. Thus, the user can confirm the return promotion notification and its withdrawal through the battery pack whether the battery pack is in a state of being removed from the vehicle 10 or in a state of being mounted on the vehicle 10. When the battery pack is of a fixed type, the return notification unit 111 can be provided in at least one of the vehicle 10 and the battery pack.

[0113] Other configurations and controls are the same as those of Embodiment 1.

[0114] According to Embodiment 9, the user can confirm the return promotion notification of the secondary battery 2 through the return notification unit 111 to identify that the secondary battery 2 has a fault symptom and prepare for the return of the secondary battery 2. In addition, subsequently, the user can confirm the withdrawal of the return promotion notification through the return notification unit 111 to identify that the detailed inspection result of the secondary battery 2 is that the secondary battery 2 is actually normal. Thus, it is possible to quickly notify the user of information related to the fault of the secondary battery 2.

[0115] In addition to this, it has the same effects as those of Embodiment 1.

[0116] The present disclosure has been described based on the above-described embodiments, but it should be understood that the present disclosure is not limited to such embodiments and structures. The present disclosure also includes various modifications and variations within the same scope. In addition, various combinations and modes, even those including only one element, more, or fewer other combinations and modes, are included in the scope and concept of the present disclosure. For example, the following modes applying the above-described respective modes can also be implemented.

[0117] In the above-described mode, an example is shown in which the usability of the secondary battery 2 is determined based on the inspection result R of the battery characteristics of the secondary battery 2 and the determination results Ta and Tb are displayed, but instead of this case, it is also possible to display only the inspection result R of the battery characteristics without determining the usability of the secondary battery 2, or to display the inspection result R of the battery characteristics together with the determination results Ta and Tb. The program used when not determining the usability of the secondary battery 2 only needs to be a program for causing the processor 1 to implement at least the function of acquiring the monitoring data X of the secondary battery 2 and the function of inspecting the battery characteristics of the secondary battery 2 based on the inspection data Y when a fault symptom of the secondary battery 2 is acquired based on the acquired monitoring data X.

[0118] <Display Program>

[0119] In addition, the battery monitoring program described in the present embodiment includes at least a part of the display program P10 (refer to Figure 15 ) described as a technical idea to be described later. Alternatively, the display program P10 may not be included in the battery monitoring program but may be independent. The display program P10 is recorded on a non-removable storage medium of at least one of the charging station 20 and the battery service center 30. The display program P10 performs information display for the user on at least one of the continued use display unit 106 of the charging station 20 and the replacement display unit 107 of the battery service center 30.

[0120] In addition, the display program P10 may also be downloaded from a cloud server or the like to a holding device 60 such as a desktop or notebook personal computer (PC), a tablet terminal, or a mobile terminal held by the user. Moreover, the display program P10 may perform information display for the user on the screen of the holding device 60. In such a mode, for example Figure 15 the display unit 61 shown is equivalent to the screen of the holding device 60. In addition, the display program P10 may also be stored in the cloud server.

[0121] [Technical Idea 1]

[0122] A display program (P10) for causing a processor (1) to implement the function of displaying a fault symptom of a secondary battery (2) and an inspection result (R) of the battery characteristics of the above secondary battery having the fault symptom on a display unit (61).

[0123] [Technical idea 2]

[0124] According to the display program described in Technical idea 1, it is used to enable the processor to implement at least one of the functions of causing the display unit to display a temporary order for a replacement secondary battery that replaces the secondary battery with a fault symptom, and a formal order for the replacement secondary battery that replaces the secondary battery determined to be unusable.

[0125] [Technical idea 3]

[0126] According to the display program described in Technical idea 2, it is used to enable the processor to implement at least one of the functions of causing the display unit to display the use restriction of the secondary battery with a fault symptom and the release of the use restriction of the secondary battery determined to be normal.

[0127] [Technical idea 4]

[0128] According to the display program described in Technical idea 3, it is used to enable the processor to implement at least one of the functions of causing the display unit to display a notice to promote the return of the secondary battery with a fault symptom and the withdrawal of the notice to promote the return of the secondary battery determined to be normal.

Claims

1. A battery monitoring program (P1, P2, P3, P4, P5, P6, P7, P8, P9), wherein: The invention is used to enable a processor (1) to realize a function of acquiring a malfunction sign of a secondary battery (2) and a function of checking the battery characteristics of the secondary battery when the malfunction sign of the secondary battery is acquired.

2. The battery monitoring program according to claim 1, wherein: The invention is used to make the processor (1) realize the function of determining whether the secondary battery can be used based on the inspection result (R) of the battery characteristics.

3. The battery monitoring program according to claim 1, wherein: A processor (1) is used to implement a function of instructing a temporary order of a replacement secondary battery to replace the secondary battery when a malfunction sign of the secondary battery is obtained, and a function of instructing a formal order of the replacement secondary battery when it is determined that the secondary battery cannot be used based on an inspection result (R) of the battery characteristics.

4. The battery monitoring program according to claim 1, wherein: The invention is used to enable the processor (1) to realize the function of outputting a usage restriction instruction (Sa) to the battery control unit (3) when a malfunction sign of the secondary battery is obtained, and the function of outputting a usage restriction release instruction (Sb) to the battery control unit when the secondary battery is normal based on the inspection result (R) of the battery characteristics.

5. The battery monitoring program according to claim 1, wherein: The invention is used to enable a processor (1) to realize a function of issuing a return promotion notification of the secondary battery when a failure sign of the secondary battery is obtained, and a function of cancelling the return promotion notification when the secondary battery is normal based on the inspection result (R) of the battery characteristics.

6. A recording medium (50), wherein: The battery monitoring program according to any one of claims 1 to 5 is recorded in a readable manner.

7. A battery monitoring system (100, 200, 300, 400, 500, 600, 700, 800, 900), which is a battery monitoring system for monitoring a secondary battery (2), wherein, have: The inspection unit (104) inspects the battery characteristics of the secondary battery when a failure sign of the secondary battery is obtained.

8. The battery monitoring system according to claim 7, wherein, have: a usability determination unit (105) for determining whether the secondary battery can be used based on a test result (R) of the battery characteristics by the test unit; and The usability display unit (106, 107) displays the determination result (Ta, Tb) of the usability determination unit.

9. The battery monitoring system according to claim 7, wherein, have: A temporary ordering unit (108) for instructing temporary ordering of a replacement secondary battery to replace the secondary battery when a failure sign of the secondary battery is obtained; as well as A formal ordering unit (109) instructs formal ordering of the replacement secondary battery when it is determined that the secondary battery cannot be used based on the inspection result (R) of the battery characteristics by the inspection unit.

10. The battery monitoring system according to claim 7, wherein, have: The instruction output unit (110) outputs a usage restriction instruction (Sa) to the battery control unit (3) when a malfunction sign of the secondary battery is obtained, and outputs a usage restriction release instruction (Sb) to the battery control unit when the secondary battery is normal based on the inspection result (R) of the battery characteristics by the inspection unit.

11. The battery monitoring system according to claim 7, wherein, have: The return notification unit (111) issues a return promotion notification for the secondary battery when a failure symptom of the secondary battery is obtained, and withdraws the return promotion notification when the secondary battery is normal based on the inspection result (R) of the battery characteristics by the inspection unit.

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