Battery configurations having through-pack fasteners

Patent metadata

Field	Value
Publication number	US-11923494-B2
Application number	US-202017014637-A
Country	US
Kind code	B2
Filing date	Sep 8, 2020
Priority date	Sep 8, 2020
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

Energy storage devices, battery cells, and batteries of the present technology may include a base plate. The batteries may include a first circuit board overlying the base plate. The batteries may include a battery stack overlying the first circuit board and electrically coupled with the first circuit board. The battery stack may include a plurality of battery cells. The battery stack may define an aperture through an active region of the battery stack. The batteries may include a second circuit board overlying the battery stack and electrically coupled with the battery stack. The batteries may include a compression plate overlying the second circuit board. The batteries may include a retaining member compressibly coupling the compression plate with the base plate. The retaining member may extend through the aperture through the active region of the battery stack.

First claim

What is claimed is:

1. A battery comprising:
a base plate;
a first circuit board overlying the base plate;
a battery stack overlying the first circuit board and electrically coupled with the first circuit board, wherein the battery stack comprises a plurality of battery cells, each battery cell including:
a planar anode current collector defining a first aperture;
a planar cathode current collector defining a second aperture; and
a planar separator disposed between the planar anode current collector and the planar cathode current collector, the planar separator defining a third aperture;

a second circuit board overlying the battery stack and electrically coupled with the battery stack;
a compression plate overlying the second circuit board; and
a retaining member compressibly coupling the compression plate with the base plate, wherein the retaining member extends through each of the first, second, and third apertures of each respective battery cell of the plurality of battery cells.

2. The battery of claim 1 , wherein each battery cell of the battery stack comprises:
a polymeric material forming a portion of the planar anode current collector;
an anode active material disposed on the planar anode current collector;
a polymeric material forming a portion of the planar cathode current collector;
a cathode active material disposed on the planar cathode current collector; and
a separator disposed between the planar anode active material and the planar cathode active material.

3. The battery of claim 2 , wherein a seal is formed in an active region of each battery cell of the battery stack about the first, second, and third apertures defined through the active region of the battery stack.

4. The battery of claim 1 , further comprising:
a first compliant pad positioned between the base plate and the first circuit board; and
a second compliant pad positioned between the second circuit board and the compression plate.

5. The battery of claim 1 , wherein the compression plate is characterized by a profile in an uncompressed state to provide substantially equal pressure on the second circuit board when compressed by the retaining member.

6. The battery of claim 5 , wherein the base plate is characterized by a profile in an uncompressed state to provide substantially equal pressure on the first circuit board when compressed by the retaining member.

7. The battery of claim 1 , wherein the base plate defines a plurality of channels configured to receive a heat exchange fluid.

8. The battery of claim 1 , wherein the battery stack defines a plurality of apertures through an active region of the battery stack, the battery comprising a plurality of retaining members compressibly coupling the compression plate with the base plate.

9. The battery of claim 8 , wherein the compression plate is characterized by a thickness of less than or about 5 mm, and wherein the compression plate with the plurality of retaining members is configured to substantially maintain planarity of the compression plate under an opposing force of greater than or about 5 psi.

10. A battery comprising:
a base plate;
a first circuit board overlying the base plate;
a battery stack overlying the first circuit board and electrically coupled with the first circuit board, wherein the battery stack comprises a plurality of battery cells, each battery cell including
a planar anode current collector defining a first aperture;
a planar cathode current collector defining a second aperture; and
a planar separator disposed between the planar anode current collector and the planar cathode current collector, the planar separator defining a third aperture;

a second circuit board overlying the battery stack and electrically coupled with the battery stack; and
a plurality of retaining members coupling the second circuit board with the base plate, wherein each retaining member of the plurality of retaining members extends each of the first, the second, and third apertures of each respective battery cell of the plurality of battery cells.

11. The battery of claim 10 , wherein each battery cell of the battery stack comprises:
a polymeric material forming a portion of the planar anode current collector;
an anode active material disposed on the planar anode current collector;
a polymeric material forming a portion of the planar cathode current collector;
a cathode active material disposed on the planar cathode current collector; and
a separator disposed between the planar anode active material and the planar cathode active material.

12. The battery of claim 11 , wherein a seal is formed in an active region of each battery cell of the battery stack about each aperture of first, second and third apertures.

13. The battery of claim 10 , wherein the second circuit board is characterized by a profile in an uncompressed state to provide substantially equal pressure on the battery stack when compressed by the plurality of retaining members.

14. The battery of claim 10 , wherein the base plate defines a plurality of channels configured to receive a heat exchange fluid.

15. The battery of claim 10 , further comprising:
an enclosure housing the battery stack; and
a lid coupled with the enclosure housing, wherein each retaining member of the plurality of retaining members extends through the lid.

16. A battery comprising:
a base plate, wherein the base plate defines a plurality of channels configured to receive a heat exchange fluid;
a first circuit board overlying the base plate;
a battery stack overlying the first circuit board and electrically coupled with the first circuit board, wherein the battery stack comprises a plurality of battery cells, each battery cell including:
a planar anode current collector defining a first aperture;
a planar cathode current collector defining a second aperture; and
a planar separator disposed between the planar anode current collector and the planar cathode current collector, the planar separator defining a third aperture;

a second circuit board overlying the battery stack and electrically coupled with the battery stack; and
a retaining member coupling the second circuit board with the base plate, wherein the retaining member extends each of the first, the second, and third apertures of each respective battery cell of the plurality of battery cells.

17. The battery of claim 16 , wherein each battery cell of the battery stack comprises:
a polymeric material forming a portion of the planar anode current collector;
an anode active material disposed on the planar anode current collector;
a polymeric material forming a portion of the planar cathode current collector;
a cathode active material disposed on the planar cathode current collector; and
a separator disposed between the anode active material and the cathode active material.

18. The battery of claim 16 , wherein the base plate is characterized by a first surface facing the first circuit board, wherein the base plate is characterized by a second surface opposite the first surface, wherein the plurality of channels are defined between the first surface of the base plate and the second surface of the base plate, and wherein the base plate defines a fourth aperture configured to receive the retaining member.

19. The battery of claim 18 , wherein the fourth aperture defined by the base plate extends through the first surface of the base plate, and wherein a channel of the plurality of channels extends between the retaining member and the second surface.

Assignees

• Apple Inc

Inventors

• Erb Dylan
• Caulk Abraham B
• Johnstal Ross L
• Firehammer Paul W
• Hillstrom Edward T
• Shi Zhongying
• O'Connor Ian E
• Clarabut Alexander J

Classifications

• H01M50/284

  with incorporated circuit boards, e.g. printed circuit boards [PCB] · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M50/242

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title

• H01M50/289

  characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) · CPC title