Energy storage module having extinguisher sheet

Patent metadata

Field	Value
Publication number	US-11799167-B2
Application number	US-202016901522-A
Country	US
Kind code	B2
Filing date	Jun 15, 2020
Priority date	Sep 5, 2019
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

An energy storage module includes: a cover member accommodating a plurality of battery cells in an internal receiving space, the battery cells being arranged in a first direction, each of the battery cells including a vent; a top plate coupled to a top of the cover member and including a duct corresponding to the vent of each of the battery cells; a top cover coupled to a top of the top plate and having a discharge opening corresponding to the duct; and an extinguisher sheet between the top cover and the top plate, the extinguisher sheet being configured to emit a fire extinguishing agent at a reference temperature.

First claim

What is claimed is:

1. An energy storage module comprising:
a cover member accommodating a plurality of battery cells in an internal receiving space, the battery cells being arranged in a first direction, each of the battery cells comprising a vent;
a top plate coupled to a top of the cover member and comprising a plurality of ducts respectively corresponding to the vents of the battery cells;
a top cover coupled to a top of the top plate and having a plurality of discharge openings, a first one of the ducts being aligned with a first one of the discharge openings to be in fluid communication therewith, a second one of the ducts being aligned with a second one of the discharge openings to be in fluid communication therewith; and
an extinguisher sheet between the top cover and the top plate, the extinguisher sheet having a first opening through which the first one of the ducts is in fluid communication with the first one of the discharge openings and a second opening through which the second one of the ducts is in fluid communication with the second one of the discharge openings, the extinguisher sheet being configured to emit a fire extinguishing agent at a reference temperature.

2. The energy storage module of claim 1 , wherein the extinguisher sheet extends in the first direction.

3. The energy storage module of claim 1 , further comprising a plurality of insulation spacers respectively between adjacent ones of the battery cells.

4. The energy storage module of claim 3 , wherein the top plate has openings respectively corresponding to the insulation spacers.

5. The energy storage module of claim 4 , wherein the extinguisher sheet is over the openings in the top plate and over the insulation spacers.

6. The energy storage module of claim 1 , wherein the extinguisher sheet has an outer cover comprising polyurea or polyurethane and a fire extinguishing agent in a receiving space defined by the outer cover.

7. The energy storage module of claim 6 , wherein the receiving space is a tube shape, or
wherein the receiving space comprises a plurality of receiving spaces in capsule shapes.

8. The energy storage module of claim 7 , wherein the fire extinguishing agent comprises halogenated carbon.

9. The energy storage module of claim 1 , wherein the extinguisher sheet comprises a plurality of sheets respectively configured to emit the fire extinguishing agent at different temperatures.

10. The energy storage module of claim 9 , wherein the sheets of the extinguisher sheet are stacked on each other.

11. The energy storage module of claim 1 , further comprising a plurality of the extinguisher sheets.

12. The energy storage module of claim 11 , wherein each of the extinguisher sheets extends in the first direction.

13. The energy storage module of claim 11 , wherein the extinguisher sheets are spaced from the battery cells by a first distance, and
wherein an upper end of the ducts is spaced from the corresponding one of the battery cells by a second distance, the first distance being greater than the second distance.

14. The energy storage module of claim 1 , wherein a proportion of the fire extinguishing agent contained in the extinguisher sheet to the total weight of the extinguisher sheet is in a range from 30% to 50%.

15. The energy storage module of claim 1 , wherein the fire extinguishing agent is contained in the extinguisher sheet in an amount of 0.12 g/cm 3 to 0.82 g/cm 3 .

16. The energy storage module of claim 1 , wherein each of the battery cells comprises:
a negative electrode comprising: a negative electrode current collector; a negative electrode active material layer on the negative electrode current collector; and
a negative electrode function layer on the negative electrode active material layer; and
a positive electrode comprising: a positive electrode current collector; and a positive electrode active material layer on the positive electrode current collector,
wherein the negative electrode function layer comprises flake-shaped polyethylene particles, and the positive electrode active material layer comprises a first positive electrode active material comprising at least one composite oxide of lithium and a metal selected from the group consisting of cobalt (Co), manganese (Mn), nickel (Ni), and a combination of these metals and a second positive electrode active material comprising a compound represented by the Chemical Formula (1):
Li a Fe 1-x M x PO 4   (1)

wherein 0.90≤a≤1.8, 0≤x≤0.7, and M is Mg, Co, Ni, or a combination thereof.

17. The energy storage module of claim 16 , wherein the flake-shaped polyethylene particles have an average particle diameter (D50) in a range from 1 μm to 8 μm.

18. The energy storage module of claim 16 , wherein the flake-shaped polyethylene particles have an average particle diameter (D50) in a range from 2 μm to 6 μm.

19. The energy storage module of claim 16 , wherein the flake-shaped polyethylene particles have a thickness in a range from 0.2 μm to 4 μm.

20. The energy storage module of claim 16 , wherein the first positive electrode active material and the second positive electrode active material are contained in a weight ratio in a range from 97:3 to 80:20.

21. The energy storage module of claim 1 , wherein the first one of the discharge openings is formed of a plurality of sub-discharge openings.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kwak Eun Ok
• Yun Jin Bhum
• Kim Jang Hoon
• Kim Jin Taek
• Woo Jong Yeol
• Lee Kwang Deuk
• Choi Woo Sung

Classifications

• H01M4/364

  as mixtures · CPC title

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• H01M50/342

  Non-re-sealable arrangements · CPC title

• H01M4/628 Primary

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title