Toyota jidosha kabushiki kaisha (20240186809). FULL CHARGE CAPACITY ESTIMATION METHOD AND CONTROL DEVICE simplified abstract

FULL CHARGE CAPACITY ESTIMATION METHOD AND CONTROL DEVICE

Organization Name

toyota jidosha kabushiki kaisha

Inventor(s)

Mitsuru Tateishi of Toyota-shi (JP)

Hajime Hasegawa of Aichi-gun (JP)

Shun Takeoka of Toyota-shi (JP)

Shinya Takeshita of Toyota-shi (JP)

Takashi Okada of Toyota-shi (JP)

Chihiro Matsuda of Toyohashi-shi (JP)

Tomoyuki Kawai of Kariya-shi (JP)

Toshiya Arakawa of Kariya-shi (JP)

FULL CHARGE CAPACITY ESTIMATION METHOD AND CONTROL DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240186809 titled 'FULL CHARGE CAPACITY ESTIMATION METHOD AND CONTROL DEVICE

Simplified Explanation

The abstract describes a patent application for a bipolar LFP battery, which consists of stacked cells with lithium iron phosphate in the positive electrode active material layer. The patent involves a calculation unit that determines an increase in charge amount during charging, and a full charge capacity estimation unit that uses this increase to estimate the full charge capacity of the cell.

• Explanation of the patent/innovation:

   - Bipolar LFP battery with stacked cells
   - Positive electrode active material layer with lithium iron phosphate
   - Calculation unit for determining increase in charge amount during charging
   - Full charge capacity estimation unit using the increase to estimate full charge capacity

• Potential applications of this technology:

   - Electric vehicles
   - Energy storage systems
   - Portable electronics

• Problems solved by this technology:

   - Improved accuracy in estimating full charge capacity
   - Enhanced performance and efficiency of the battery
   - Better management of charging processes

• Benefits of this technology:

   - Longer battery life
   - Increased reliability
   - Optimal charging control

• Potential commercial applications of this technology:

   - Battery manufacturing companies
   - Electric vehicle manufacturers
   - Energy storage system providers

• Possible prior art:

   - Prior art related to lithium iron phosphate batteries
   - Prior art on charge capacity estimation in batteries

1. 1. 1. Unanswered Questions:
         1. How does the increase in charge amount during charging impact the overall performance of the battery?

The increase in charge amount helps in estimating the full charge capacity of the cell, ensuring optimal charging and enhancing the battery's efficiency.

1. 1. 1. 1. What specific advantages does using lithium iron phosphate in the positive electrode active material layer provide compared to other materials?

Lithium iron phosphate offers advantages such as improved safety, longer cycle life, and better thermal stability, making it a preferred choice for battery applications.

Original Abstract Submitted

a bipolar lfp battery includes a plurality of cells that are stacked together. a positive electrode active material layer of each of the cells includes lithium iron phosphate. a �q calculation unit calculates an increase �q of a charge amount, during charging of the cell of the bipolar lfp battery. the increase �q is an increase in the charge amount of the cell when the voltage of the cell increases from a first voltage to a second voltage. a full charge capacity estimation unit uses a full charge capacity map to estimate the full charge capacity of the cell, using the increase �q of the charge amount as a parameter.