GS Yuasa has been granted a patent for a vehicle-use energy storage apparatus that ensures sufficient electricity for normal use while reserving spare electricity. The apparatus includes an energy storage device with a negative electrode containing a carbon material and a second active material with higher oxidation potential and discharge capacity. The device allows for a main discharge reaction in the first active material during normal use and in the second active material during emergencies. A transmitting mechanism sends a signal before the shift in discharge reaction, allowing the occupant to decide whether to continue discharging. The discharge capacity attributed to the second active material is between 10% and 50%. GlobalData’s report on GS Yuasa gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on GS Yuasa, hydrogen storage alloys was a key innovation area identified from patents. GS Yuasa's grant share as of September 2023 was 31%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for a vehicle-use energy storage apparatus
A recently granted patent (Publication Number: US11772511B2) describes a vehicle-use energy storage apparatus that includes an energy storage device with a negative electrode. The negative electrode contains a first active material made of a carbon material and a second active material with a higher oxidation potential and discharge capacity per volume than the carbon material. During normal operation, the main discharge reaction occurs in the first active material, while during emergencies, the main discharge reaction occurs in the second active material.
The energy storage apparatus also includes a transmitting mechanism that sends a signal before the main discharge reaction shifts from the first active material to the second active material. This signal allows the vehicle occupant to decide whether or not to continue discharging the energy storage device. The rate of discharge capacity attributed to the second active material is between 10% and 50%.
The second active material can be a simple element such as silicon, tin, or aluminum, a compound containing these elements, or a combination of the simple element and the compound. The content of the second active material is limited to 8 mass % or less of the total content of the first and second active materials.
The patent also describes a vehicle-use discharge system that includes the aforementioned energy storage apparatus and a transmitting mechanism. This system allows the occupant to select whether or not to continue discharging when the signal is transmitted. If the occupant chooses to continue discharging, the energy storage apparatus will discharge even after the main discharge reaction shifts from the first active material to the second active material.
Additionally, the patent includes a discharge control method that involves selecting whether or not to continue discharging when the signal is transmitted using the vehicle-use energy storage apparatus described in claim 1.
Overall, this patent presents an energy storage apparatus and system for vehicles that can optimize the use of different active materials during normal and emergency situations. The inclusion of a transmitting mechanism allows the vehicle occupant to make an informed decision about continuing the discharge process.