IP Library Granted Patent US 10,992,004
Granted Patent B2
US 10,992,004 · App. 16/234,847 · Granted Apr 27, 2021

Electric vehicle solid state battery cell

Inventors: Derek Nathan Wong (Santa Clara, CA); Scott Quinlan Freeman Monismith (Santa Clara, CA); Jeremy Elsberry (Santa Clara, CA); Brennan Campbell (Santa Clara, CA); Ying Liu (Santa Clara, CA); Yifan Tang (Santa Clara, CA)
Assignee: TeraWatt Technology Inc.
H01M50/10B60L50/64H01M50/531H01M50/543H01M2220/20
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Quick Facts
Patent No.
US 10,992,004
App. No.
16/234,847
Granted
Apr 27, 2021
Kind
B2
Abstract

A solid state battery cell can include a first polarity terminal, a second polarity terminal and a housing defining a cavity and functioning as a current collector for the first polarity terminal. The battery cell can include a membrane disposed in the cavity and dividing the cavity into a first portion and a second portion, an electrically conductive pin functioning as a current collector for the second polarity terminal, and an insulator electrically isolating the electrically conductive pin from the housing. A solid state anode material, including solid state anode particles, first solid state electrolyte particles and a first conductive additive, can be disposed in the first portion of the cavity. A solid state cathode material, including solid state cathode particles, second solid state electrolyte particles and a second conductive additive, can be disposed in the second portion of the cavity.

Claims (62)

1. A solid state battery cell to power an electric vehicle, the solid state battery cell comprising:

a first polarity terminal;

a second polarity terminal;

a housing that defines a cavity, the housing including a current collector of the first polarity terminal;

a membrane disposed in the cavity and that divides the cavity into a first portion and a second portion;

an electrically conductive pin that operates as a current collector of the second polarity terminal;

an insulator that electrically isolates the electrically conductive pin from the housing;

a solid state anode material disposed in the first portion of the cavity, the solid state anode material including solid state anode particles, first solid state electrolyte particles and a first conductive additive, the solid state anode particles at least partially coated with the first solid state electrolyte particles; and

a solid state cathode material disposed in the second portion of the cavity, the solid state cathode material including solid state cathode particles, second solid state electrolyte particles and a second conductive additive, the solid state cathode particles at least partially coated with the second solid state electrolyte particles, wherein:

the electrically conductive pin is disposed in the second portion of the cavity and electrically coupled with the solid state cathode material; and

the membrane electrically isolating the solid state anode material from the solid state cathode material and ionically connecting the solid state anode material and the solid state cathode material.

2. The solid state battery cell of claim 1 , comprising:

the housing electrically coupled with the solid state anode material.

3. The solid state battery cell of claim 1 , comprising:

the housing electrically coupled with the solid state cathode material; and

the electrically conductive pin disposed in the first portion of the cavity and electrically coupled with the solid state anode material.

4. The solid state battery cell of claim 1 , wherein the electrically conductive pin includes a plurality of branches.

5. The solid state battery cell of claim 1 , comprising:

the solid state anode particles and the first solid state electrolyte particles suspended in a solution of the first conductive additive to form the solid state anode material; and

the solid state cathode particles and the second solid state electrolyte particles suspended in a solution of the second conductive additive to form the solid state cathode material.

6. The solid state battery cell of claim 1 , wherein at least one of the first conductive additive and the second conductive additive include carbon black.

7. The solid state battery cell of claim 1 , wherein the membrane is a polymer pouch.

8. The solid state battery cell of claim 1 , comprising:

the membrane impregnated with third solid state electrolyte particles.

9. The solid state battery cell of claim 1 , wherein the solid state battery cell is at least one of a 21700 battery cell, 20700 battery cell, 17500 battery cell, 17670 battery cell, 8350 battery cell, or 18500 battery cell.

10. The solid state battery cell of claim 1 , comprising:

the solid state battery cell disposed in a battery pack installed in the electric vehicle to power the electric vehicle.

11. A method of providing a solid state battery cell to power an electric vehicle, the method comprising:

disposing a membrane in a cavity defined by a housing of the solid state battery cell to divide the cavity into a first portion and a second portion, the housing functioning as a current collector for a first polarity terminal of the solid state battery cell;

placing an electrically conductive pin in the second portion to function as a current collector for a second polarity terminal of the solid state battery cell;

preparing an anode slurry including solid state anode particles, first solid state electrolyte particles and a first conductive additive solution, the solid state anode particles at least partially coated with the first solid state electrolyte particles;

preparing a cathode slurry including solid state cathode particles, second solid state electrolyte particles and a second conductive additive solution, the solid state cathode particles at least partially coated with the second solid state electrolyte particles;

filling the first and second portions with the anode slurry and the cathode slurry such that the anode slurry and the cathode slurry are separated by the membrane, the membrane electrically isolating the anode slurry from the cathode slurry and ionically connecting the anode slurry and the cathode slurry;

placing an insulator at one end of the cavity to electrically isolate the electrically conductive pin from the housing of the solid state battery cell; and

evaporating the anode slurry and the cathode slurry to form a solid state anode material in the first portion and a solid state cathode material in the second portion.

12. The method of claim 11 , comprising:

filling the first portion with the anode slurry; and

filling the second portion with the cathode slurry.

13. The method of claim 11 , comprising:

filling the second portion with the anode slurry; and

filling the first portion with the cathode slurry.

14. The method of claim 11 , comprising:

impregnating the membrane with a third solid state electrolyte particles.

15. The method of claim 14 , wherein impregnating the membrane includes:

placing the membrane in an electrolyte solution.

16. The method of claim 11 , comprising:

disposing the solid state battery cell in a battery pack to power the electric vehicle.

17. The method of claim 11 , wherein the electrically conductive pin includes a multi-branch conductive pin and the method comprising welding a plurality of conductive elements to form the multi-branch conductive pin.

18. The method of claim 11 , wherein the first conductive additive and the second conductive additive include carbon black.

19. The method of claim 11 , wherein the membrane includes a polymer pouch.

20. An electric vehicle, comprising:

a solid state battery to power the electric vehicle, the solid state battery including:

a first polarity terminal;

a second polarity terminal;

a housing defining a cavity, the housing functioning as a current collector for the first polarity terminal;

a membrane disposed in the cavity and dividing the cavity into a first portion and a second portion;

an electrically conductive pin functioning as a current collector for the second polarity terminal;

an insulator electrically isolating the electrically conductive pin from the housing;

a solid state anode material disposed in the first portion of the cavity, the solid state anode material including solid state anode particles, first solid state electrolyte particles and a first conductive additive, the solid state anode particles at least partially coated with the first solid state electrolyte particles; and

a solid state cathode material disposed in the second portion of the cavity, the solid state cathode material including solid state cathode particles, second solid state electrolyte particles and a second conductive additive, the solid state cathode particles at least partially coated with the second solid state electrolyte particles, wherein:

the electrically conductive pin is disposed in the second portion of the cavity and electrically coupled with the solid state cathode material; and

the membrane electrically isolating the solid state anode material from the solid state cathode material and ionically connecting the solid state anode material and the solid state cathode material.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 12, 2021
From: CHONGQING JINKANG NEW ENERGY AUTOMOBILE CO., LTD.
To: SF MOTORS, INC.
Reel/Frame 054888/0609 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 31, 2020
From: SF MOTORS, INC.
To: TERAWATT TECHNOLOGY INC.
Reel/Frame 051683/0451 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 11, 2019
From: ELSBERRY, JEREMY
To: SF MOTORS, INC.
Reel/Frame 048566/0124 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 9, 2019
From: SF MOTORS, INC.
To: CHONGQING JINKANG NEW ENERGY VEHICLE CO., LTD.; SF MOTORS, INC.
Reel/Frame 048553/0755 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 13, 2019
From: WONG, DEREK NATHAN; MONISMITH, SCOTT QUINLAN FREEMAN; CAMPBELL, BRENNAN; LIU, YING; TANG, YIFAN
To: SF MOTORS, INC.
Reel/Frame 048317/0376 →