Collector plate for energy storage device and methods of manufacturing

Patent metadata

Field	Value
Publication number	US-2018182560-A1
Application number	US-201715796644-A
Country	US
Kind code	A1
Filing date	Oct 27, 2017
Priority date	Apr 10, 2013
Publication date	Jun 28, 2018
Grant date	—

Abstract

This disclosure provides collector plates for an energy storage device, energy storage devices with a collector plate, and methods for manufacturing the same. In one aspect, a collector plate includes a body. One or more apertures extend into the body. The apertures are configured to allow a portion of a free end of a spirally wound current collector of a spirally wound electrode for an energy storage device to extend into the one or more apertures.

First claim

1 . (canceled)

2 . An energy storage device, comprising:
an electrode comprising a current collector, the current collector comprising a plurality of laterally spaced layers forming a free end; a container configured to receive the electrode and an electrolyte; and a collector plate comprising:
a body with an aperture extending into a lower surface of the body; and
at least one protrusion extending from the lower surface of the body, each protrusion configured to penetrate the free end of the current collector when the current collector is pressed against the collector plate.

3 . The energy storage device of claim 2 , wherein the aperture extends through an entire thickness of the body, to allow flow through the body, wherein a first portion of the free end of the current collector extends into the aperture when the current collector is pressed against the collector plate

4 . The energy storage device of claim 2 , wherein the electrode comprises a spirally wound electrode.

5 . The energy storage device of claim 2 , wherein the energy storage device comprises a capacitor.

6 . The energy storage device of claim 2 , wherein the energy storage device comprises a battery.

7 . The energy storage device of claim 2 , further comprising the electrolyte.

8 . The energy storage device of claim 2 , wherein the at least one protrusion forms at least a partial perimeter around the aperture.

9 . The energy storage device of claim 2 , wherein the at least one protrusion extends approximately orthogonally from the lower surface of the body.

10 . The energy storage device of claim 2 , wherein the first portion of the free end of the current collector extends completely through the body.

11 . The energy storage device of claim 2 , wherein the first portion of the free end of the current collector includes a body engagement section that extends into the aperture, and engages an inner surface of the body.

12 . The energy storage device of claim 11 , wherein the body engagement section extends completely through the body, and engages an upper surface of the body.

13 . The energy storage device of claim 2 , wherein a portion of the lower surface of the body contacts a second portion of the free end of the current collector when the first portion of the free end of the current collector extends into the aperture.

14 . The energy storage device of claim 13 , further comprising a weld to attach the collector plate to the second portion of the free end of the current collector.

15 . A method of manufacturing an energy storage device, comprising:
providing an electrode comprising a current collector, the current collector comprising a plurality of laterally spaced layers forming a free end; providing a collector plate comprising a body with an aperture extending into a lower surface of the body and a protrusion extending from the lower surface of the body; and pressing the collector plate against the electrode, such that the protrusion penetrates a first portion of the free end of the current collector.

16 . The method of claim 15 , wherein pressing comprises engaging the first portion of the free end with an inner surface of the body.

17 . The method of claim 15 , wherein pressing comprises pressing the collector plate against the electrode such that a first portion of the free end of the current collector extends into the aperture.

18 . The method of claim 17 , wherein pressing comprises pressing the collector plate against the electrode such that the first portion of the free end extends completely through a thickness of the collector plate.

19 . The method of claim 18 , wherein pressing comprises engaging the first portion of the free end with an upper surface of the body.

20 . The method of claim 15 , wherein pressing comprises flattening a second portion of the free end of the current collector against the lower surface of the body.

21 . The method of claim 20 , wherein flattening comprises reducing the height of the free ends by an amount greater than or equal to approximately 60%.

22 . The method of claim 20 , further comprising attaching the second portion of the free end to the collector plate.

23 . The method of claim 22 , wherein attaching comprises welding.

24 . The method of claim 15 , further comprising inserting the electrode into a container, and filling the container with electrolyte, wherein filling comprises impregnating the electrode with electrolyte in less than 15 minutes.

Assignees

• Maxwell Lab

Inventors

• Khakhalev Alexander D

Classifications

• H01G9/048 Primary

  characterised by their structure (H01G11/22 takes precedence) · CPC title

• H01G9/0029

  Processes of manufacture · CPC title

• Y10T29/49108

  Electric battery cell making · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• Y10T29/4911

  including sealing · CPC title