CN-116648810-B - Method for determining authenticity of battery, apparatus for determining authenticity of battery, and program

Abstract

An acquisition unit (41) acquires, for a battery to be evaluated, 1 st data indicating a charge/discharge history in a1 st period and 2 nd data indicating a charge/discharge history in a2 nd period preceding the 1 st period, a calculation unit (42) calculates, based on the 1 st data, a1 st state quantity indicating a state quantity of the battery in the 1 st period, calculates, based on the 2 nd data, a2 nd state quantity indicating an estimated value of the state quantity of the battery in the 1 st period, and a determination unit (43) performs, based on the 1 st state quantity and the 2 nd state quantity, an authentication determination whether the battery is a normal or an imitation during the 1 st period, and an output unit (44) outputs a result of the authentication determination.

Inventors

• TASAKI NOBUAKI

Assignees

• 松下电器（美国）知识产权公司

Dates

Publication Date

20260508

Application Date

20210915

Priority Date

20210106

Claims (9)

1. 1. A method for judging the authenticity of a battery, The following processes are performed by the computer: for a battery having a battery cell, acquiring 1 st data representing a charge-discharge history in a1 st period and 2 nd data representing a charge-discharge history in a 2 nd period preceding the 1 st period, Calculating a1 st state quantity representing a state quantity of the battery in the 1 st period based on the 1 st data, Calculating a2 nd state quantity representing an inferred value of the state quantity of the battery in the 1 st period based on the 2 nd data, Based on the 1 st state quantity and the 2 nd state quantity, an authenticity judgment of whether the battery is a genuine product or a counterfeit product is made in the 1 st period, And outputting the true and false judgment result.
2. 2. The authentication method for a battery according to claim 1, wherein, The state quantity includes a full capacitance.
3. 3. The authentication method for a battery according to claim 2, wherein, In the calculation of the 1 st state quantity, the full capacity is calculated every time the battery is fully charged during the 1 st period based on the 1 st data, thereby calculating a plurality of full capacity values, In the calculation of the 2 nd state quantity, an estimated value of the full charge capacity of the battery in the 1 st period and an allowable upper limit value and an allowable lower limit value sandwiching the estimated value are calculated based on the 2 nd data, In the authentication judgment, a ratio of the number of the full capacity values exceeding the allowable upper limit value or lower than the allowable lower limit value in the 1 st period to the total number of the plurality of full capacity values is calculated as a suspected rate that the battery is a counterfeit.
4. 4. The method for determining the authenticity of a battery according to any one of claims 1 to 3, wherein, The state quantity includes an open terminal-to-terminal voltage corresponding to a remaining capacity rate.
5. 5. The method for determining the authenticity of a battery according to claim 4, wherein, In the calculation of the 1 st state quantity, the open inter-terminal voltage is calculated every time the battery is charged in the 1 st period based on the 1 st data, thereby calculating a plurality of open inter-terminal voltage values, In the calculation of the 2 nd state quantity, an estimated value of the open-terminal voltage in the 1 st period and an allowable upper limit value and an allowable lower limit value sandwiching the estimated value are calculated based on the 2 nd data, In the authentication judgment, a ratio of the number of the open inter-terminal voltage values exceeding the allowable upper limit value or lower than the allowable lower limit value in the 1 st period to the total number of the plurality of open inter-terminal voltage values is calculated as a suspected rate that the battery is a counterfeit.
6. 6. The method for determining the authenticity of a battery according to any one of claims 1 to 5, wherein, The state quantity includes a drop voltage corresponding to a remaining capacity rate and a discharge current rate.
7. 7. The authentication method for a battery according to claim 6, wherein, In the calculation of the 1 st state quantity, the drop voltage is calculated every time the battery is discharged during the 1 st period based on the 1 st data, thereby calculating a plurality of drop voltage values, In the calculation of the 2 nd state quantity, an estimated value of the drop voltage in the 1 st period and an allowable upper limit value and an allowable lower limit value sandwiching the estimated value are calculated based on the 2 nd data, In the authentication judgment, a ratio of the number of the reduced voltage values exceeding the allowable upper limit value or lower than the allowable lower limit value in the 1 st period to the total number of the plurality of reduced voltage values is calculated as a suspected rate that the battery is a counterfeit.
8. 8. A battery authenticity judging device is provided with: an acquisition unit that acquires, for a battery having a battery cell, 1 st data indicating a charge/discharge history in a1 st period and 2 nd data indicating a charge/discharge history in a2 nd period preceding the 1 st period; A calculation unit that calculates a1 st state quantity representing a state quantity of the battery during the 1 st period based on the 1 st data, calculates a2 nd state quantity representing an estimated value of the state quantity of the battery during the 1 st period based on the 2 nd data, and A judging unit that judges whether the battery is a genuine product or a counterfeit product in the 1 st period based on the 1 st state quantity and the 2 nd state quantity, and And an output unit configured to output the result of the authenticity determination.
9. 9. A program for causing a computer to function as: an acquisition unit that acquires, for a battery having a battery cell, 1 st data indicating a charge/discharge history in a1 st period and 2 nd data indicating a charge/discharge history in a 2 nd period preceding the 1 st period; A calculation unit that calculates a1 st state quantity representing a state quantity of the battery in the 1 st period based on the 1 st data, and calculates a2 nd state quantity representing an estimated value of the state quantity of the battery in the 1 st period based on the 2 nd data; A judging unit that judges whether the battery is a genuine product or a counterfeit product in the 1 st period based on the 1 st state quantity and the 2 nd state quantity, and And the output unit outputs the true and false judgment result.

Description

Method for determining authenticity of battery, apparatus for determining authenticity of battery, and program Technical Field The present disclosure relates to a battery authentication method, a battery authentication device, and a program. Background Patent document 1 discloses a battery authentication system that determines whether or not a battery is authentic based on a battery pack ID given to an ECU of a battery pack. According to the battery authentication system disclosed in patent document 1, when only the battery cell is exchanged for a counterfeit, the battery can be accurately determined as a counterfeit. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2012-222945 Disclosure of Invention An object of the present disclosure is to provide a technique capable of accurately judging a battery as a counterfeit even when only the battery cell is exchanged for the counterfeit. In the battery authenticity judging method according to one aspect of the present disclosure, 1 st data indicating a charge/discharge history in a 1 st period and 2 nd data indicating a charge/discharge history in a2 nd period preceding the 1 st period are acquired for a battery to be judged, a 1 st state quantity indicating a state quantity of the battery in the 1 st period is calculated based on the 1 st data, a2 nd state quantity indicating an estimated value of the state quantity of the battery in the 1 st period is calculated based on the 2 nd data, authenticity judgment of whether the battery is a normal or a counterfeit is performed in the 1 st period based on the 1 st state quantity and the 2 nd state quantity, and a result of the authenticity judgment is outputted. Drawings Fig. 1 is a block diagram schematically showing the structure of a battery management system according to an embodiment of the present disclosure. Fig. 2 is a flowchart showing an example 1 of the authentication judgment processing executed by the server apparatus. Fig. 3 is a diagram showing an example of time-series change in the full capacity value of the battery pack. Fig. 4 is a flowchart showing an example 2 of the authentication judgment processing executed by the server apparatus. Fig. 5 is a diagram showing an example of the distribution of OCV values according to the SOC of the battery pack. Fig. 6 is a flowchart showing an example 3 of the authentication judgment processing executed by the server apparatus. Fig. 7 is a diagram showing a voltage drop that occurs with a discharging operation of the battery pack. Fig. 8 is a diagram showing an example of a distribution of the voltage drop values according to the SOC and the discharge current rate of the battery pack. Fig. 9 is a flowchart showing an example 4 of the authentication judgment processing executed by the server apparatus. Fig. 10 is a diagram showing a modification 1 of the system configuration. Fig. 11 is a diagram showing a modification 2 of the system configuration. Fig. 12 is a diagram showing a modification 3 of the system configuration. Detailed Description (Knowledge underlying the present disclosure) The pure battery pack used for electric motorcycles and the like is expensive and can be reselled, and therefore, it is expected that the imitation will be widely circulated. In order to prevent accidents or vehicle failures caused by the use of inferior counterfeits, and to maintain proper prices of normal products, it is necessary to suppress the circulation of counterfeits in the market. Patent document 1 discloses a battery authentication system for a battery mounted in an electric vehicle. In this system, the antitheft unit compares the 1 st battery ID stored in the memory of the ECU included in the battery pack with the 2 nd battery ID stored in the memory of the ECU included in the vehicle, permits the start of the vehicle if the two match, and prohibits the start of the vehicle if the two do not match. However, according to the battery authentication system disclosed in patent document 1, when an ECU of a genuine product is used in a battery pack and only battery cells are exchanged for a counterfeit product, the antitheft unit misjudges the battery pack as a genuine product because the 1 st battery pack ID stored in the memory of the ECU is unchanged. In order to solve the above-described problems, the present inventors have found that the present disclosure is achieved by recording the charge/discharge history of a battery, judging the authenticity of the battery based on the state quantity of the battery that can be calculated from the charge/discharge history, and detecting the exchange of battery cells by a sudden large change in the state quantity. Next, various aspects of the present disclosure will be described. In the method for determining authenticity of a battery according to one aspect of the present disclosure, a computer acquires 1 st data indicating a charge/discharge history during a1 st period and 2 nd