Battery with multiple jelly rolls in a single pouch

Patent metadata

Field	Value
Publication number	US-9331358-B2
Application number	US-69414410-A
Country	US
Kind code	B2
Filing date	Jan 26, 2010
Priority date	Jan 26, 2010
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

The disclosed embodiments provide a battery cell which includes a set of jelly rolls enclosed in a pouch. Each jelly roll includes layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a first set of conductive tabs and a second set of conductive tabs. Each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls, and each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls. At least one of the first set and one of the second set of conductive tabs extend through seals in the pouch to provide terminals for the battery cell.

First claim

What is claimed is:

1. A battery cell, comprising:
a set of jelly rolls arranged in a side-by-side configuration, wherein each of the jelly rolls comprises layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch enclosing the set of jelly rolls, wherein the pouch is flexible;
a first set of conductive tabs, wherein each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls; and
a second set of conductive tabs, wherein each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls,
wherein, for each jelly roll, both the conductive tab coupled to the anode and the conductive tab coupled to the cathode extend from a first side of the jelly roll towards a first side of the pouch; and
wherein only one tab of the first set and one tab of the second set of conductive tabs extend through seals on the first side of the pouch and the rest of the first and second sets of conductive tabs do not extend through seals on any side of the pouch.

2. The battery cell of claim 1 , wherein the jelly rolls are electrically connected outside the pouch using the first and second sets of conductive tabs.

3. The battery cell of claim 2 , wherein the jelly rolls are electrically connected:
in a series configuration:
in a parallel configuration; or
in a series and parallel configuration.

4. The battery cell of claim 3 , wherein the jelly rolls are internally separated within the pouch if the jelly rolls are electrically connected in the series configuration.

5. The battery cell of claim 1 , wherein the jelly rolls are sealed in the pouch based on an asymmetric battery design.

6. The battery cell of claim 1 , wherein sealing the jelly rolls in the pouch involves at least one of:
gluing the jelly rolls to the inside of the pouch; and
placing the jelly rolls within a set of frames inside the pouch.

7. A battery pack comprising one or more battery cells coupled together and enclosed in a hard case, wherein each of the one or more battery cells includes:
a set of jelly rolls arranged in a side-by-side configuration, wherein each of the jelly rolls comprises layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch enclosing the jelly rolls, wherein the pouch is flexible;
a first set of conductive tabs, wherein each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls; and
a second set of conductive tabs, wherein each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls,
wherein, for each jelly roll, both the conductive tab coupled to the anode and the conductive tab coupled to the cathode extend from a first side of the jelly roll towards a first side of the pouch; and
wherein only one tab of the first set and one tab of the second set of conductive tabs extend through seals on the first side of the pouch and the rest of the first and second sets of conductive tabs do not extend through seals on any side of the pouch.

8. The battery pack of claim 7 , wherein the jelly rolls are electrically connected outside the pouch using the first and second sets of conductive tabs.

9. The battery pack of claim 8 , wherein the jelly rolls are electrically connected:
in a series configuration:
in a parallel configuration; or
in a series and parallel configuration.

10. The battery pack of claim 9 , wherein the jelly rolls are internally separated within the pouch if the jelly rolls are electrically connected in the series configuration.

11. The battery pack of claim 7 , wherein sealing the jelly rolls in the pouch involves at least one of:
gluing the jelly rolls to the inside of the pouch; and
placing the jelly rolls within a set of frames inside the pouch.

12. A portable electronic device, comprising:
a set of components powered by a battery pack; and
the battery pack comprising one or more battery cells coupled together, wherein each of the one or more battery cells includes:
a set of jelly rolls arranged in a side-by-side configuration, wherein each of the jelly rolls comprises layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch enclosing the jelly rolls, wherein the pouch is flexible;
a first set of conductive tabs, wherein each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls; and
a second set of conductive tabs, wherein each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls,
wherein, for each jelly roll, both the conductive tab coupled to the anode and the conductive tab coupled to the cathode extend from a first side of the jelly roll towards a first side of the pouch; and
wherein only one tab of the first set and one tab of the second set of conductive tabs extend through seals on the first side of the pouch and the rest of the first and second sets of conductive tabs do not extend through seals on any side of the pouch.

13. The portable electronic device of claim 12 , wherein sealing the jelly rolls in the pouch involves at least one of:
gluing the jelly rolls to the inside of the pouch; and
placing the jelly rolls within a set of frames inside the pouch.

14. The portable electronic device of claim 12 , wherein the jelly rolls are electrically connected:
in a series configuration:
in a parallel configuration; or
in a series and parallel configuration.

15. The portable electronic device of claim 12 , wherein the battery pack is placed behind a display of the portable electronic device.

16. The battery cell of claim 1 , wherein, within the pouch, one or more of the jelly rolls in the set of jelly rolls is stacked on one or more other jelly rolls in the set of jelly rolls.

17. A battery pack comprising one or more battery cells coupled together and enclosed in a hard case, wherein each of the one or more battery cells includes:
a set of jelly rolls arranged in a side-by-side configuration, wherein each of the jelly rolls comprises layers which are wound together, including a cathode with an active coating, a separator, and an anode with an active coating;
a pouch enclosing the jelly rolls, wherein the pouch is flexible;
a first set of conductive tabs, wherein each of the first set of conductive tabs is coupled to the cathode of one of the jelly rolls; and
a second set of conductive tabs, wherein each of the second set of conductive tabs is coupled to the anode of one of the jelly rolls;
wherein:
for each jelly roll, a first side of the jelly roll is flush with the same sides of the other jelly rolls in the set of jelly rolls and both the conductive tab coupled to the anode and the conductive tab coupled to the cathode extend from the first side of the jelly roll towards a first side of the pouch;
wherein only one tab of the first set and one tab of the second set of conductive tabs extend through seals on the first side of the pouch and the rest of the first and second sets of conductive tabs do not extend through seals on any side of the pouch, wherein the only one of the first set and one of the second set of conductive tabs are coupled to different jelly rolls;

the jelly rolls are electrically connected in a series configuration; and
the jelly rolls each fill a separate compartment within the pouch, wherein each separate compartment within the pouch comprises a pouch indent that is connected by spot welding.

Assignees

• Bhardwaj Ramesh C
• Hwang Taisup
• Mank Richard M
• Apple Inc

Inventors

• Bhardwaj Ramesh C
• Hwang Taisup
• Mank Richard M

Classifications

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• H01M10/0431 Primary

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• Y10T29/49108

  Electric battery cell making · CPC title

• H01M10/0404

  Machines for assembling batteries · CPC title

• Y10T29/4911

  including sealing · CPC title