Lead-acid battery design having versatile form factor

• US 8,808,914 B2
• Filed: 02/14/2013
• Issued: 08/19/2014
• Est. Priority Date: 01/13/2012
• Status: Expired due to Fees

• Current Assignee: TBP Investments LLC
• Original Assignee: Energy Power Systems LLC
• Inventors: Dhar, Subhash, Koetting, William, Nielson, Michael, Tom, Kwok, Espinel, Jorge, Albano, Fabio
• Primary Examiner(s): Takeuchi, Yoshitoshi
• Application Number:
  US13/766,991
• Publication Number:
  US 20130183559A1
• Time in Patent Office: 551 Days
• US Class Current: 429/228
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 10/0477 with circular plates
• CPC Class Codes: H01M 10/12 Construction or manufacture
• CPC Class Codes: H01M 10/122 Multimode batteries
• CPC Class Codes: H01M 10/123 Cells or batteries with cylindrical casing
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An electrochemical storage device comprises a plurality of layer electrodes, wherein each layer electrode includes a first charged sector and a second charged sector, wherein the second charged sector is charged oppositely compared to the first charged sector, and wherein the plurality of layer electrodes are assembled with respect to each other such that the first charged sector of a first plate of the plurality of layer electrodes is laid below the second charged sector of a second plate of the plurality of layer electrodes located immediately above the first plate, wherein the charges of the first charged sectors of the first and second plates have a first sign and the charges of the second charged sectors of the first and second plates have a second sign that is opposite the first sign; a separator sector located, and enabling ionic charge exchange between the first charged sector of the first plate and the second charged sector of the second plate.

Claims

1. A lead-acid battery, comprising:

a cylindrical case forming a common gas management cavity, the cylindrical case being sealed;

a first cell stack comprising a first non-flooded cell in an overlapping spirally wound configuration having ionic transfer therein;

a second cell stack comprising a second non-flooded cell in an overlapping spirally wound configuration having ionic transfer therein; and

a conductive substrate comprising a current collector embedded in both an active material of the first cell stack and an active material of the second cell stack,

the conductive substrate electrically connecting the first cell stack and the second cell stack,

the conductive substrate further comprising a first portion and a second portion;

the first non-flooded cell further comprising a first positive electrode and a first negative electrode, the first positive electrode being disposed on the first portion of the conductive substrate,

the second non-flood cell further comprising a second positive electrode and a second negative electrode, the second negative electrode being disposed on the second portion of the conductive substrate,

the first cell stack and the second sell stack being formed by simultaneously rolling a first cell strip and a second cell strip corresponding respectively to the first non-flooded cell and the second non-flooded cell; and

the first cell stack and the second cell stack being disposed in the common gas management cavity and disposed axially in the cylindrical case.

2. The lead-acid battery of claim 1, wherein the cylindrical case is vented.

3. The lead-acid of claim 1, wherein each of the first cell strip and the second cell strip includes a positive electrode strip, a negative electrode strip, and a separator strip disposed between the positive electrode strip and the negative electrode strip, and the positive electrode strip, the negative strip, and the separator strip overlap one another.

4. The lead-acid of claim 1, further comprising a center mandrel disposed within the common gas management cavity and oriented axially along the cylindrical case, wherein the first cell stack and the second cell stack are rolled around the center mandrel.

5. The lead-acid battery of claim 3, wherein the separator strips are configured to enable the ionic transfer within the first non-flooded cell and the second non-flooded cell.

6. The lead-acid battery of claim 1, wherein each of the first cell stack and the second cell stack includes a plurality of electrode layers having positive electrodes and negative electrodes arranged in an alternating order.

7. The lead-acid battery of claim 6, wherein the separator layer includes an ionically conductive medium.

8. The lead-acid battery of claim 7, wherein the separator includes a polymeric membrane or Nafion material.

9. The lead-acid battery of claim 1, wherein the first positive electrode and the second negative electrode form a bipole electrode.