# US 12,224,462 B2 · Electrolyte supply system and secondary battery using same

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- Number: US 12,224,462 B2
- Document ID: US12224462B2
- Status: Granted
- Kind: B2
- Application number: 18/730,036
- Filed: 2022-12-26
- Published: 2024-12-19
- Granted: 2025-02-11
- Earliest claimed: 2022-03-31
- Assignees: Panasonic Holdings Corporation; Primearth Ev Energy Co., Ltd.
- Applicants: Panasonic Holdings Corporation; Primearth Ev Energy Co., Ltd.
- Inventors: Hiroki Matsui; Ryosuke Asai; Kouji Iida; Sadaaki Shimura
- Web page: https://patentgrep.com/patent/US12224462B2

## CPC

- H01M 50/673: Containers for storing liquids; Delivery conduits therefor
- H01M 10/484: {for measuring electrolyte level, electrolyte density or electrolyte conductivity}
- H01M 50/609: Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M 50/77: with external circulating path
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An electrolyte supply system for supplying an electrolyte to a use point, includes: a receiving storage tank configured to store the electrolyte that has been delivered; a supply storage tank to which the electrolyte is transferred from the receiving storage tank; a temperature control device configured to control temperatures of the electrolyte in the receiving storage tank and that in the supply storage tank; and a supply pipe that is laid from the supply storage tank to the use point. The electrolyte supply system is highly safe because the storage tanks are disposed in an outdoor location, and furthermore, performs a temperature control process for the receiving storage tank before the electrolyte is transferred to the supply storage tank. Thus, it can supply the electrolyte to the use point 24 hours a day even with little temperature control in the supply storage tank.

## Claims

### Claim 1

An electrolyte supply system for supplying an electrolyte to a use point, comprising:
a receiving storage tank configured to store the electrolyte that has been delivered,
a circulation pipe for recirculating the electrolyte in the receiving storage tank to the receiving storage tank;
a receiving storage tank pump provided in the circulation pipe to circulate the electrolyte;
a supply storage tank to which the electrolyte is transferred from the receiving storage tank;
a connection pipe provided in the circulation pipe to connect the receiving storage tank and the supply storage tank;
a temperature control device configured to control temperatures of the electrolyte in the receiving storage tank and that in the supply storage tank; and
a supply pipe that is laid from the supply storage tank to the use point;
wherein
the supply pipe is of a circulation type with which the electrolyte returns to the supply storage tank.

### Claim 2 (depends on 1)

The electrolyte supply system according to claim 1, further comprising a controller configured to send an instruction so that the electrolyte is transferred from the receiving storage tank to the supply storage tank when an amount of the electrolyte in the supply storage tank becomes a predetermined amount or less.

### Claim 3 (depends on 1)

The electrolyte supply system according to claim 1, comprising a controller configured to calculate a lot percentage after transfer of the electrolyte from the receiving storage tank to the supply storage tank has been completed.

### Claim 4 (depends on 1)

The electrolyte supply system according to claim 1, wherein the temperature control device is disposed at each of the receiving storage tank and the supply storage tank.

### Claim 5 (depends on 1)

A manufacturing method of a secondary/rechargeable battery containing an electrolyte comprising:
a process for placing a positive electrode, a negative electrode, and a separator in a container; and
a process for supplying the electrolyte by the electrolyte supply system according to claim 1.