Bipolar Storage Battery

Patent metadata

Field	Value
Publication number	US-2023318046-A1
Application number	US-202318331452-A
Country	US
Kind code	A1
Filing date	Jun 8, 2023
Priority date	Dec 10, 2020
Publication date	Oct 5, 2023
Grant date	—

Abstract

A bipolar storage battery includes a bipolar electrode including a positive electrode, a negative electrode, and a substrate provided with the positive electrode on one surface and the negative electrode on another surface. The bipolar storage battery includes a first adhesive provided between the one surface of the substrate and the positive electrode to bond the positive electrode to the substrate. The first adhesive is a conductive adhesive. This configuration can provide a bipolar storage battery in which battery performance is less likely to deteriorate by preventing an electrolytic solution from easily infiltrating an interface between a positive electrode and an adhesive layer even when growth occurs in the positive electrode due to corrosion by sulfuric acid contained in the electrolytic solution.

First claim

What is claimed is:

1 . A bipolar storage battery comprising:
a bipolar electrode including a positive electrode, a negative electrode, and a bipolar plate provided with the positive electrode on one surface and the negative electrode on an other surface, wherein: a first adhesive is provided between the one surface of the bipolar plate and the positive electrode to bond the positive electrode to the bipolar plate, and the first adhesive is a conductive adhesive.

2 . The bipolar storage battery according to claim 1 , wherein the positive electrode includes a positive current collector, the negative electrode includes a negative current collector, and the positive current collector and the negative current collector are made of lead or a lead alloy.

3 . The bipolar storage battery according to claim 1 , wherein the first adhesive is provided to cover the one surface of the bipolar plate.

4 . The bipolar storage battery according to claim 3 , wherein the positive electrode includes a positive current collector, the negative electrode includes a negative current collector, and the positive current collector and the negative current collector are made of lead or a lead alloy.

5 . The bipolar storage battery according to claim 1 , wherein the first adhesive is provided in a peripheral region of a communication hole communicating the one surface and the other surface of the bipolar plate, and a second adhesive is provided in another region other than the peripheral region in the one surface of the bipolar plate.

6 . The bipolar storage battery according to claim 5 , wherein the positive electrode includes a positive current collector, the negative electrode includes a negative current collector, and the positive current collector and the negative current collector are made of lead or a lead alloy.

7 . The bipolar storage battery according to claim 5 , wherein the peripheral region where the first adhesive is provided has a shape similar to a shape of the communication hole and is a region surrounding the communication hole about a center of the communication hole.

8 . The bipolar storage battery according to claim 7 , wherein the positive electrode includes a positive current collector, the negative electrode includes a negative current collector, and the positive current collector and the negative current collector are made of lead or a lead alloy.

9 . The bipolar storage battery according to claim 7 , wherein when the communication hole has a circular shape, the peripheral region where the first adhesive is provided is between 1.1 times and 1.5 times, inclusive, a diameter of the communication hole.

10 . The bipolar storage battery according to claim 9 , wherein the positive electrode includes a positive current collector, the negative electrode includes a negative current collector, and the positive current collector and the negative current collector are made of lead or a lead alloy.

11 . The bipolar storage battery according to claim 5 , wherein when the communication hole has a circular shape, the peripheral region where the first adhesive is provided is between 1.1 times and 1.5 times, inclusive, a diameter of the communication hole.

12 . The bipolar storage battery according to claim 11 , wherein the positive electrode includes a positive current collector, the negative electrode includes a negative current collector, and the positive current collector and the negative current collector are made of lead or a lead alloy.

Assignees

• Furukawa Electric Co Ltd
• Furukawa Battery Co Ltd

Inventors

• Tanaka Hiroki
• Nakajima Yasuo
• Suyama Kenichi
• Tanaka Akira
• Yamauchi Miho

Classifications

• H01M10/18 Primary

  with bipolar electrodes · CPC title

• H01M4/685 Primary

  Lead alloys · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title

• H01M4/68

  for use in lead-acid accumulators · CPC title

• H01M4/14

  Electrodes for lead-acid accumulators · CPC title