JP-7855020-B2 - Control device, control method, and program

Inventors

• 渡辺 貴春
• 星川 渉
• 小笠原 航汰
• 中西 しおり
• 銭 朴

Assignees

• 本田技研工業株式会社

Dates

Publication Date

20260507

Application Date

20240328

Claims (7)

1. An acquisition unit that acquires charge/discharge rate information regarding the charge/discharge rate during charging and discharging of a lithium metal battery having a lithium-containing negative electrode, The system includes a determination unit that determines the charge and discharge content for the lithium metal battery based on the charge and discharge rate information , The charge/discharge rate information is discharge rate information relating to the discharge rate of the lithium metal battery, The determination unit determines a smaller charging current as the charge/discharge content when the charging rate included in the charge/discharge rate information is less than or equal to a first specified value. Control device.
2. An acquisition unit that acquires charge/discharge rate information regarding the charge/discharge rate during charging and discharging of a lithium metal battery having a lithium-containing negative electrode, The system includes a determination unit that determines the charge and discharge content for the lithium metal battery based on the charge and discharge rate information, The charge/discharge rate information is discharge rate information relating to the current discharged from the lithium metal battery, The determination unit determines a larger discharge current as the charge/discharge content when the discharge rate included in the charge/discharge rate information exceeds a second specified value. Control device.
3. The aforementioned charge/discharge rate information is information regarding the average discharge rate or the difference between the average charge and discharge rates within a specified time period. The control device according to claim 1.
4. The acquisition unit refers to the charge and discharge history of the lithium metal battery to determine whether charge and discharge operations exceeding a specified current amount have been repeated, and if charge and discharge operations exceeding a specified current amount have been repeated, it determines whether the charge rate included in the charge and discharge rate information is less than or equal to a first specified value . The control device according to claim 1.
5. The US lithium metal battery is installed in a vehicle. The determination unit determines the charge and discharge details when the vehicle is performing charge and discharge with an external device. The control device according to claim 1.
6. Computers We obtain charge/discharge rate information regarding the charge/discharge rate during charging and discharging of a lithium metal battery equipped with a lithium-containing negative electrode. Based on the charge/discharge rate information, the charge/discharge details for the lithium metal battery are determined . The charge/discharge rate information is discharge rate information relating to the discharge rate of the lithium metal battery, The computer determines a small charging current as the charge/discharge content when the charging rate included in the charge/discharge rate information is less than or equal to a first specified value. Control method.
7. On the computer, We obtain charge/discharge rate information regarding the charge/discharge rate during charging and discharging of a lithium metal battery equipped with a lithium-containing negative electrode. Based on the charge/discharge rate information, the system determines the charge/discharge content for the lithium metal battery. The charge/discharge rate information is discharge rate information relating to the discharge rate of the lithium metal battery, The computer is instructed to determine a smaller charging current as the charge/discharge content when the charging rate included in the charge/discharge rate information is less than or equal to a first specified value. program.

Description

This invention relates to a control device, a control method, and a program. In recent years, research and development has been conducted to contribute to energy efficiency, aiming to ensure that more people have access to affordable, reliable, sustainable, and advanced energy. Among such technologies, lithium metal batteries, which utilize lithium metal as the negative electrode, are attracting attention as a secondary battery. A lithium metal battery includes a positive electrode, a negative electrode having a metallic lithium layer, and an electrolyte placed between the positive and negative electrodes. International Publication No. 2023/118960Japanese Patent Publication No. 2023-17581Japanese Patent Publication No. 2022-113377 This figure shows an example of the configuration of a vehicle M equipped with the control device 100 of the embodiment.This is a diagram showing an example of the configuration of the control device 100.This figure shows an example of the visualized first reference control map 121 and first control map 122.This figure shows an example of a visualized second reference control map 123 and a second control map 124.This flowchart shows an example of the processing performed by the control device 100. The following describes embodiments of the control device, control method, and program of the present invention with reference to the drawings. Figure 1 shows an example of the configuration of a vehicle M equipped with the control device 100 of the embodiment. The control device 100 of the embodiment controls the amount of current charged and discharged to the lithium metal battery 10 mounted in the vehicle M. The lithium metal battery 10 includes a negative electrode containing lithium. The lithium metal battery 10 is a rechargeable secondary battery. Vehicle M is included in what is known as V2H (Vehicle to Home) or V2X (Vehicle to X) systems. Vehicle M can be charged and discharged with an external device, such as a charging/discharging facility 80. When the charging/discharging facility 80 initiates charging or discharging with vehicle M, it sends a V2H request to vehicle M. Vehicle M, upon receiving the V2H request, initiates charging or discharging with the charging/discharging facility 80. The charging/discharging equipment 80 charges the lithium metal battery 10 mounted on the vehicle M by discharging current into it. The current adjustment device 70 mounted on the vehicle M converts the alternating current (AC) from the charging/discharging equipment 80 into direct current (DC), steps down the current, and charges the lithium metal battery 10. The lithium metal battery 10 mounted on the vehicle M discharges current to charge the charging/discharging equipment 80. The current adjustment device 70 mounted on the vehicle M converts the DC current discharged by the lithium metal battery 10 into alternating current (AC), steps up the current, and charges the charging/discharging equipment 80. Vehicle M is equipped with a lithium metal battery 10, as well as electrical equipment 40, measuring instruments 50, a control unit 60, and a current adjustment device 70. The measuring instruments 50 include, for example, a voltage detector 51 and a current detector 52. The control unit 60 includes, for example, a control device 100 and an ECU (Electronic Control Unit) 200. The lithium metal battery 10 is, for example, a semi-solid-state battery. The lithium metal battery 10 comprises, for example, a positive electrode 11, a negative electrode 12, and an electrolyte 13. The positive electrode 11 comprises, for example, a positive electrode current collector 11A and a positive electrode active material layer 11B. The positive electrode current collector 11A is, for example, made of a current collector foil such as aluminum. The positive electrode active material layer 11B is, for example, made of a layer such as lithium cobalt oxide. The negative electrode 12 comprises, for example, a negative electrode current collector 12A and a negative electrode active material layer 12B. The negative electrode current collector 12A is, for example, made of a current collector foil such as copper. The negative electrode active material layer 12B is, for example, made of a metallic lithium layer. The electrolyte 13 is a semi-solid electrolyte containing lithium ions (Li+). The electrolyte 13 is separated into a positive electrode 11 side and a negative electrode 12 side by a separator 13S. During discharge, when the lithium metal battery 10 supplies power to the electrical equipment 40 mounted on the vehicle M, lithium ions (Li+) flow from the negative electrode active material layer 12B through the separator 13S to the positive electrode 11. Along with the flow of lithium ions (Li+), electrons (e) flow from the negative electrode 12 through the circuitry of the electrical equipment 40 to the positive electrode 11. The flow of lithium ions (Li+) and electrons (e) causes a current to flow from the positive el