JP2013218909A - Battery information management server, battery information recording medium, and battery information management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery information management server, a battery information management system, etc., having information indicating the value of a secondary battery.SOLUTION: The battery information management server that communicates with an external apparatus connected to a battery, comprises: key generation means for generating an encryption key and a decryption key on the basis of a specific number of the battery transmitted from the external apparatus via a network; storage means for storing the decryption key and the specific number after correlating them to each other; encryption key transmission means for transmitting the encryption key to the external apparatus; decryption key acquisition means for acquiring the decryption key stored in the storage means on the basis of the specific number of the battery transmitted from the external apparatus; decryption means for decrypting encrypted charge/discharge information transmitted from the external apparatus by using the decryption key acquired by the decryption key acquisition means; value information calculation means for calculating value information indicting the value of the battery on the basis of the decrypted charge/discharge information; and value information transmission means for transmitting the value information to the external apparatus.

Description

  Embodiments described herein relate generally to a battery information management server, a battery information recording device, and a battery information management system.

  A rechargeable secondary battery is generally put into practical use. Secondary batteries are applied to automobiles, motorcycles, trains, elevators, wind power generation, and the like. For example, a lead storage battery, a nickel metal hydride battery, or a lithium ion battery has been put to practical use as a secondary battery.

JP 2007-335157 A

  Some secondary batteries are greatly deteriorated by heat or the like. For example, when heat is generated from the secondary battery during discharging or charging to the secondary battery, the secondary battery may be deteriorated by this heat. The amount of power that can be stored in the deteriorated secondary battery is reduced. However, the degree of deterioration of the secondary battery cannot be distinguished visually. For this reason, there exists a subject that the value of a secondary battery cannot be evaluated in the case of resale of a secondary battery.

  Then, it aims at providing the battery information management server, battery information recording device, and battery information management system which can provide a user with the information which shows the value of a secondary battery.

  The battery information management server according to an embodiment is a battery information management server that performs communication via a network with an external device connected to a battery that stores electricity, and a unique number of the battery transmitted from the external device A key generation unit that generates an encryption key and a decryption key based on the storage unit, a storage unit that stores the decryption key and the unique number in association with each other, an encryption key transmission unit that transmits the encryption key to the external device, Decryption key acquisition means for acquiring the decryption key stored in the storage means based on a unique number of the battery transmitted from the external device, and encrypted charge / discharge information transmitted from the external device And decrypting means using the decryption key obtained by the decryption key obtaining means, and calculating value information indicating the value of the battery based on the decrypted charge / discharge information And value information calculation unit that comprises and a value information transmitting means for transmitting the value information to the external device.

FIG. 1 is a diagram for describing a configuration example of a battery information management system according to an embodiment. FIG. 2 is a diagram for describing an example of a battery information management server according to an embodiment. FIG. 3 is a diagram for explaining an example of the battery information recording apparatus according to the embodiment. FIG. 4 is a diagram for explaining an example of processing of the battery information management system according to the embodiment. FIG. 5 is a diagram for explaining an example of processing of the battery information management system according to the embodiment. FIG. 6 is a diagram for explaining an example of processing of the battery information management system according to the embodiment. FIG. 7 is a diagram for explaining an example of processing of the battery information management system according to the embodiment.

  Hereinafter, a battery information management server, a battery information recording device, and a battery information management system according to an embodiment will be described in detail with reference to the drawings.

FIG. 1 shows a configuration example of a battery information management system 1 according to an embodiment. FIG. 2 shows an example of the configuration of the battery information management server 100. FIG. 3 shows an example of the configuration of the battery information management server 100.
The battery information management system 1 includes a battery information management server 100 and a battery information recording device 220 incorporated in the secondary battery 200.

  When the secondary battery 200 is manufactured, the manufacturer (battery manufacturer) assigns a unique number to the secondary battery 200. The battery manufacturer applies for registration of the secondary battery 200 to which the unique number is assigned. The battery manufacturer transmits the registration application and the unique number assigned to the secondary battery 200 to the battery information management server 100. For example, the battery manufacturer gives a unique number and applies for registration using a terminal that manages the issuance of the secondary battery 200.

  The battery information management server 100 receives the registration application and unique number of the secondary battery 200 transmitted from the battery manufacturer. The battery information management server 100 stores the received unique number of the secondary battery 200. Further, the battery information management server 100 generates an encryption key and a decryption key in response to a registration application from a battery manufacturer. The battery information management server 100 stores the generated decryption key and the unique number of the secondary battery 200 in association with each other. Further, the battery information management server 100 returns the generated encryption key to the battery manufacturer.

  The battery information recording device 220 of the secondary battery 200 stores the encryption key returned from the battery information management server 100. The secondary battery 200 manufactured as described above is shipped and mounted on an electric vehicle (EV) such as an automobile, a motorcycle, a train, or an elevator. In the present embodiment, the description will be made on the assumption that the secondary battery 200 is mounted on an automobile.

  The battery information recording device 220 of the secondary battery 200 mounted on the automobile encrypts and records information related to charging / discharging performed on the secondary battery 200 (charging / discharging information) using an encryption key. That is, the battery information recording device 220 records the encrypted charge / discharge information.

  For example, when an automobile is sold as a used car, it is desirable that information indicating the value of a secondary battery mounted on the automobile can be provided to the user. Therefore, the battery information recording device 220 of the secondary battery 200 can supply encrypted charge / discharge information to the PC by communicating with a terminal such as a general personal computer (PC).

  The PC reads the encrypted charge / discharge information and the unique number of the secondary battery 200 from the battery information recording device 220. The personal computer transmits an assessment application for the secondary battery 200 including the encrypted charge / discharge information and the unique number to the battery information management server 100 via the network.

  When the battery information management server 100 receives the assessment application, the battery information management server 100 acquires the encrypted charge / discharge information and the unique number included in the received assessment application. The battery information management server 100 extracts a unique number that matches the acquired unique number from a plurality of already stored unique numbers. The battery information management server 100 decrypts the encrypted charge / discharge information using the decryption key associated with the extracted unique number.

  Furthermore, the battery information management server 100 calculates information (value information) indicating the value of the secondary battery 200 based on the decrypted charge / discharge information. The battery information management server 100 calculates, as the value information of the secondary battery 200, for example, information indicating a score, a rank, a lifetime of the secondary battery 200, or an amount corresponding to the value of the secondary battery 200. The battery information management server 100 returns the calculated value information to the PC.

  Thereby, the user who operates PC can recognize the appropriate value of the secondary battery 200 mounted in the automobile. Thus, the battery information management system 1 can provide value information useful for resale of the secondary battery 200 to a user who handles the secondary battery 200.

  Further, in the EV as described above, a large-capacity secondary battery 200 is required to reduce the number of times of power feeding. However, large capacity is often not required for applications such as emergency power supply for condominiums, charging of renewable energy, or maintenance power for PCs. Therefore, the secondary battery 200 whose capacity is reduced due to deterioration, that is, whose life is shortened, may be removed from the automobile and resold as a stationary secondary battery 200 in some cases.

  In such a case, the battery information management system 1 provides the user with information indicating the lifetime of the secondary battery 200. Thereby, the battery information management system 1 can provide the user with information indicating the value of the secondary battery 200 itself. That is, the battery information management system 1 can provide information for buying and selling the secondary battery 200 at an appropriate price.

  Moreover, the battery information management system 1 can provide the user with information for determining the timing of collecting the secondary battery 200 by providing the user with information indicating the life of the secondary battery 200. That is, the user can determine whether or not the battery manufacturer should collect the secondary battery 200 according to the life of the secondary battery 200 provided by the battery information management system 1. Thereby, the battery information management system 1 can recycle the secondary battery 200 more efficiently by the user.

  As shown in FIG. 2, the battery information management server 100 includes a CPU 110, a ROM 120, a RAM 130, a storage device 140, and a communication unit 150.

  The CPU 110 functions as a control unit that controls the battery information management server 100 as a whole. The CPU 110 performs various processes based on the control program and control data stored in the ROM 120 or the storage device 140.

  The ROM 120 is a nonvolatile memory that stores a control program and control data in advance. The RAM 130 is a volatile memory that functions as a working memory. The RAM 130 temporarily stores data being processed by the CPU 110. For example, the RAM 130 temporarily stores data transmitted / received to / from an external device via the communication unit 150. The RAM 130 temporarily stores a program executed by the CPU 110.

  The storage device 140 is a storage module capable of storing, for example, a hard disk drive, a solid state drive, or other large-capacity data. The storage device 140 stores, for example, a control program, control data, an application, and data used for the application. In addition, the storage device 140 can store the unique number of the secondary battery 200 and the decryption key in association with each other.

  As shown in FIG. 3, the secondary battery 200 includes a battery 210, a current detector 211, a voltage detector 212, a temperature detector 213, and a battery information recording device 220. The battery information recording apparatus 220 includes a CPU 221, an analog-digital converter 222, a real time clock (RTC) 223, a nonvolatile memory 224, a unique number memory 225, an encryption key memory 226, an encryption unit 227, and a communication unit 228. Prepare.

  The battery 210 stores electric power supplied from an external power supply device. The battery 210 is, for example, a lead storage battery, a nickel metal hydride battery, or a lithium ion battery.

  The current detector 211 detects a current value when electricity is discharged from the battery 210 or a current value when electricity is stored in the battery 210. The voltage detector 212 detects a voltage value when electricity is discharged from the battery 210 or a voltage value when electricity is stored in the battery 210. The current detector 211 and the voltage detector 212 supply the detected current value and voltage value to the battery information recording device 220.

  The temperature detector 213 detects the temperature of the air near the battery 210 or the surface of the battery 210. That is, the temperature detector 213 detects the environmental temperature of the battery 210. The temperature detector 213 supplies the detected temperature to the battery information recording device 220.

  The CPU 221 functions as a control unit that controls the entire battery information recording apparatus 220. The battery information recording device 220 may further include a ROM that stores a program executed by the CPU 221 and a RAM that temporarily stores data being processed.

  The analog-digital converter 222 converts an analog signal into a digital signal. The analog-digital converter 222 converts the analog current value and voltage value supplied from the current detector 211 and the voltage detector 212 into digital signals. The analog-digital converter 222 supplies a digital current value and voltage value to the CPU 221.

  The analog-digital converter 222 converts an analog signal indicating the temperature supplied from the temperature detector 213 into a digital signal. The analog-digital converter 222 supplies a digital temperature value to the CPU 221.

  The RTC 223 is a time measuring unit that sequentially counts time. The RTC 223 supplies information indicating the current time to the CPU 221.

  The CPU 221 generates charge / discharge information by associating the current value, the voltage value, the temperature value, and the current time.

  The nonvolatile memory 224 is a storage device that stores various types of information. The unique number memory 225 is a memory for storing a unique number previously assigned to each battery 210 by the battery manufacturer. The encryption key memory 226 is a memory that stores the encryption key transmitted from the battery information management server 100. The encryption unit 227 is a processor that encrypts a digital signal based on a predetermined algorithm.

  When recording the charge / discharge information, the CPU 221 supplies the charge / discharge information to the encryption unit 227. Further, when recording the charge / discharge information, the CPU 221 reads the encryption key from the encryption key memory 226 and supplies the read encryption key to the encryption unit 227. The encryption unit 227 encrypts the charge / discharge information using the supplied encryption key. The encryption unit 227 supplies the encrypted charge / discharge information to the nonvolatile memory 224.

  The nonvolatile memory 224 stores the supplied charge / discharge information. The nonvolatile memory 224 stores the encrypted charge / discharge information in a non-rewritable state.

  The communication unit 228 is an interface for connecting to a network. The battery information recording device 220 can communicate with the battery information management server 100 on the network through the communication unit 228.

  If the unique number and the encryption key are unlikely to be changed during operation, it is desirable that the unique number memory 225 and the encryption key memory 226 are configured by a memory (One Time Rom) that cannot be rewritten. .

  The RTC 223 is preferably reset when power is not supplied. Thereby, the battery information recording device 220 can record information for determining whether or not the secondary battery 200 has been disassembled. The RTC 223 is not reset when power is not supplied after a predetermined authentication process or the like is performed, and is reset when power is not supplied without a predetermined authentication process or the like. It may be a configuration.

FIG. 4 shows an example of a registration process for the secondary battery 200.
As described above, the battery information recording device 220 transmits a registration application for the secondary battery 200 including the unique number stored in the unique number memory 225 to the battery information management server 100 on the network via the communication unit 228 (step S110). S11).

  When the battery information management server 100 receives a registration application for the secondary battery 200, the battery information management server 100 acquires a unique number of the secondary battery 200 from the registration application. The battery information management server 100 generates an encryption key and a decryption key based on the acquired unique number and information (center management information) such as the date and time when the registration application is received (step S12). Battery information management server 100 generates a public key as an encryption key and a secret key as a decryption key when generating an encryption key and a decryption key by a public key cryptosystem.

  The battery information management server 100 associates the unique number with the generated decryption key and stores them in the storage device 140 (step S13). Further, the battery information management server 100 returns the generated encryption key to the battery information recording device 220 of the secondary battery 200 (step S14).

  The battery information recording device 220 of the secondary battery 200 stores the encryption key returned from the battery information management server 100 in the encryption key memory 226 (step S15). Thereby, the battery information recording device 220 can encrypt the charge / discharge information detected at the time of charge / discharge with the encryption key and record it in the nonvolatile memory 224.

FIG. 5 shows an example of a process for recording charge / discharge information by the secondary battery 200.
For example, the battery information recording device 220 sequentially detects whether or not there is a change in current using the current detector 211 (step S21). When there is a change in the current, the battery information recording device 220 measures the voltage value, the current value, and the environmental temperature of the battery 210 using the current detector 211, the voltage detector 212, and the temperature detector 213, respectively (step). S22). Battery information recording device 220 determines that charging has been performed when the current value is a positive value. Also, the battery information recording device 220 determines that the discharge has been performed when the current value is a negative value.

  The battery information recording device 220 generates one charge / discharge information by associating the voltage value, current value, environmental temperature, and date / time detected by the current detector 211, the voltage detector 212, and the temperature detector 213. . The battery information recording device 220 encrypts the charge / discharge information using the encryption key stored in the encryption key memory 226 (step S23). Furthermore, the battery information recording device 220 generates a CRC (Cyclic Redundancy Check) code based on the charge / discharge information. The battery information recording device 220 encrypts the cyclic redundancy check code using the encryption key stored in the encryption key memory 226. The battery information recording device 220 stores the encrypted charge / discharge information and the cyclic redundancy check code in the nonvolatile memory 224 (step S24), and loops to step S21.

  The battery information recording device 220 can record the charging / discharging log of the battery 210 in an encrypted state by sequentially performing the processes of steps S21 to S24.

FIG. 6 shows an example of the value determination process of the secondary battery 200.
When acquiring information indicating the value of the secondary battery 200, the battery information recording device 220 transmits the unique number and the application for assessment to the battery information management server 100 via a terminal such as a PC or directly (step S31).

  The battery information management server 100 extracts a unique number that matches the received unique number from a plurality of unique numbers stored in the storage device 140. The battery information management server 100 acquires a decryption key associated with the extracted unique number (step S32).

  Also, the battery information recording device 220 transmits the encrypted charge / discharge information stored in the nonvolatile memory 224 to the battery information management server 100 via a terminal such as a PC or directly (step S33).

  The battery information management server 100 receives the encrypted charge / discharge information. The battery information management server 100 decrypts the encrypted charge / discharge information using the decryption key acquired by the above processing (step S34).

  Furthermore, the battery information management server 100 calculates information (value information) indicating the value of the secondary battery 200 based on the decrypted charge / discharge information (step S35). The battery information management server 100 returns the calculated value information to the battery information recording device 220 or the PC connected to the battery information recording device 220 (step S36).

  The battery information recording device 220 or the PC connected to the battery information recording device 220 displays the received value information (step S37).

  Thereby, the user can recognize the appropriate value of the secondary battery 200. Thus, the battery information management system 1 can provide value information useful for resale of the secondary battery 200 to a user who handles the secondary battery 200. As a result, it is possible to provide a battery information management server, a battery information recording device, and a battery information management system that can provide information indicating the value of the secondary battery 200 to the user.

  The battery information management server 100 may be configured to determine whether the charge / discharge information has been tampered with using the cyclic redundancy check code generated by the above processing.

FIG. 7 shows an example of processing by the battery information management server 100.
In this case, the battery information recording device 220 receives the encrypted charge / discharge information stored in the nonvolatile memory 224 and the cyclic redundancy check code of the charge / discharge information in step S33 shown in FIG. The information is transmitted to the information management server 100.

  The battery information management server 100 receives the unique number transmitted from the battery information recording device 220 (step S41). The battery information management server 100 acquires a decryption key based on the received unique number (step S42).

  Moreover, the battery information management server 100 receives the encrypted charge / discharge information and the cyclic redundancy check code. The battery information management server 100 decrypts the received charge / discharge information using the decryption key (step S43).

  The battery information management server 100 determines whether or not the decrypted charge / discharge information is valid (step S44). That is, the battery information management server 100 performs a cyclic redundancy check based on the decoded charge / discharge information and the cyclic redundancy check code. Thereby, the battery information management server 100 determines whether or not the charge / discharge information is correctly decoded. That is, the battery information management server 100 determines whether or not the decrypted charge / discharge information has been tampered with.

  When it is determined that the charge / discharge information is valid, the battery information management server 100 calculates the value information of the secondary battery 200 based on the decrypted charge / discharge information (step S45). The battery information management server 100 returns the calculated value information to the battery information recording device 220 or the PC connected to the battery information recording device 220 (step S46).

  If it is determined that the charge / discharge information is not valid, the battery information management server 100 determines that the charge / discharge information may be falsified (step S47). In this case, the battery information management server 100 returns a message indicating that the value information cannot be calculated to the battery information recording device 220 or the PC connected to the battery information recording device 220 (step S48).

  Thereby, the user can recognize that the charge / discharge information of the secondary battery 200 has been tampered with. Thus, the battery information management server 100 can provide the user with information for more appropriately determining the value of the secondary battery 200.

  The battery information management server 100 may be configured to determine that the charge / discharge information is invalid when the date / time of the decoded charge / discharge information is an abnormal value.

  Moreover, the parameter for calculating the lifetime of the secondary battery 200 may be different for each battery manufacturer and type. Therefore, the battery information management server 100 stores a plurality of parameters for each manufacturer or each battery type in advance. The battery information management server 100 reads out a parameter corresponding to the secondary battery 200 from the stored parameters and uses it for calculation of value information, whereby the battery information management server 100 more accurately stores the value information. Can be calculated.

  It should be noted that the functions described in the above embodiments are not limited to being configured using hardware, but can be realized by causing a computer to read a program describing each function using software. Each function may be configured by appropriately selecting either software or hardware.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Battery information management system, 100 ... Battery information management server, 110 ... CPU, 120 ... ROM, 130 ... RAM, 140 ... Memory | storage device, 150 ... Communication part, 200 ... Secondary battery, 210 ... Battery, 211 ... Current detection 212, voltage detector, 213 ... temperature detector, 220 ... battery information recording device, 221 ... CPU, 222 ... analog-digital converter, 223 ... RTC, 224 ... non-volatile memory, 225 ... unique number memory, 226 ... Encryption key memory, 227... Encryption unit, 228.

Claims (8)

A battery information management server that communicates with an external device connected to a battery that stores electricity via a network,
Key generation means for generating an encryption key and a decryption key based on a unique number of the battery transmitted from the external device;
Storage means for storing the decryption key and the unique number in association with each other;
Encryption key transmitting means for transmitting the encryption key to the external device;
Decryption key acquisition means for acquiring the decryption key stored in the storage means based on the unique number of the battery transmitted from the external device;
Decryption means for decrypting encrypted charge / discharge information transmitted from the external device using the decryption key acquired by the decryption key acquisition means;
Value information calculation means for calculating value information indicating the value of the battery based on the decoded charge / discharge information;
Value information transmitting means for transmitting the value information to the external device;
A battery information management server comprising: The value information calculation means determines whether the charge / discharge information is valid based on a cyclic redundancy check code transmitted from the external device and the decoded charge / discharge information,
The value information transmitting means transmits information indicating that the calculation of the value information is impossible to the external device when it is determined that the charge / discharge information is inappropriate.
The battery information management server according to claim 1.   The battery information management server according to claim 1, wherein the value information calculation unit calculates a lifetime of the battery or an amount of the battery as the value information based on the charge / discharge information. A battery information recording device that communicates with a battery information management server via a network,
A unique number storage means for storing a unique number of a battery that stores electricity;
An encryption key receiving means for transmitting the unique number to the battery information management server and receiving an encryption key returned from the battery information management server;
Encryption key storage means for storing the encryption key;
Charging / discharging information generating means for generating charging / discharging information related to charging / discharging of the battery;
Encryption means for encrypting the charge / discharge information with the encryption key;
Charge / discharge information storage means for storing the charge / discharge information encrypted by the encryption means;
A battery information recording apparatus comprising:   Value information receiving means for transmitting the encrypted charge / discharge information and the unique number to the battery information management server and receiving value information indicating the value of the battery returned from the battery information management server is further provided. The battery information recording device according to claim 4. A cyclic redundancy check code generating means for generating a cyclic redundancy check code based on the charge / discharge information generated by the charge / discharge information generating means;
The value information receiving means transmits the encrypted charge / discharge information, the unique number, and the cyclic redundancy check code to the battery information management server.
The battery information recording device according to claim 5.   5. The battery information recording apparatus according to claim 4, wherein the charge / discharge information generation unit generates charge / discharge information by associating a current value, a voltage value, and an environmental temperature of the battery when charging / discharging the battery. . A battery information management system comprising a battery information recording device connected to a battery that stores electricity, and a battery information management server that communicates with the battery information recording device via a network,
The battery information management server includes:
Key generation means for generating an encryption key and a decryption key based on a unique number of the battery transmitted from the battery information recording device;
Storage means for storing the decryption key and the unique number in association with each other;
Encryption key transmitting means for transmitting the encryption key to the battery information recording device;
Decryption key acquisition means for acquiring the decryption key stored in the storage means based on the unique number of the battery transmitted from the battery information recording device;
Decryption means for decrypting encrypted charge / discharge information transmitted from the battery information recording device using the decryption key obtained by the decryption key obtaining means;
Value information calculation means for calculating value information indicating the value of the battery based on the decoded charge / discharge information;
Value information transmitting means for transmitting the value information to the battery information recording device;
Comprising
The battery information recording device comprises:
A unique number storage means for storing a unique number of the battery;
An encryption key receiving means for transmitting the unique number to the battery information management server and receiving an encryption key returned from the battery information management server;
Encryption key storage means for storing the encryption key;
Charging / discharging information generating means for generating charging / discharging information related to charging / discharging of the battery;
Encryption means for encrypting the charge / discharge information with the encryption key;
Charge / discharge information storage means for storing the charge / discharge information encrypted by the encryption means;
Value information receiving means for transmitting the encrypted charge / discharge information and the unique number to the battery information management server and receiving value information indicating the value of the battery returned from the battery information management server;
A battery information management system comprising:

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