Battery cell assembly

• US 9,412,980 B2
• Filed: 10/17/2014
• Issued: 08/09/2016
• Est. Priority Date: 10/17/2014
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Garascia, Michael P., Smith, Alexander Jeffrey
• Primary Examiner(s): Ryan, Patrick
• Assistant Examiner(s): Lewis, Ben
• Application Number:
  US14/516,667
• Publication Number:
  US 20160111691A1
• Time in Patent Office: 662 Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/647 Prismatic or flat cells, e.g. pouch cells
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery cell assembly having first and second rectangular-shaped end plates, a battery cell, and a metal spring clip are provided. The first rectangular-shaped end plate includes first and second grooves, and the second rectangular-shaped end plate includes first and second grooves. The battery cell is disposed between the first and second rectangular-shaped end plates. The metal spring clip has first and second end portions. The first end portion is disposed in the first groove of the first rectangular-shaped end plate, and the second end portion is disposed in the first groove of the second substantially rectangular-shaped end plate to bias the first rectangular-shaped end plate toward the second rectangular-shaped end plate.

Claims

1. A battery cell assembly, comprising:

a first substantially rectangular-shaped end plate having first and second sides, the first substantially rectangular-shaped end plate further having first and second grooves extending into the first side thereof that are disposed proximate to first and second ends respectively, of the first substantially rectangular-shaped end plate;

a second substantially rectangular-shaped end plate having first and second sides, the second substantially rectangular-shaped end plate further having first and second grooves extending into the first side thereof that are disposed proximate to first and second ends respectively, of the second substantially rectangular-shaped end plate;

a first battery cell being disposed and held between the first and second substantially rectangular-shaped end plates;

a first metal spring clip having first and second end portions, a substantially arcuate-shaped portion, and first and second substantially flat portions;

the first substantially flat portion being couple between and to a first end of the substantially arcuate-shaped portion and the first end portion, the second substantially flat portion being coupled between and to a second end of the substantially arcuate-shaped portion and the second end portion, the first end portion of the first metal spring clip being disposed in the first groove of the first substantially rectangular-shaped end plate, and the second end portion of the first metal spring clip being disposed in the first groove of the second substantially rectangular-shaped end plate to bias the first substantially rectangular-shaped end plate toward the second substantially rectangular-shaped end plate; and

a second metal spring clip having first and second end portions, the first end portion of the second metal spring clip being disposed in the second groove of the first substantially rectangular-shaped end plate and the second end portion of the second metal spring clip being disposed in the second groove of the second substantially rectangular-shaped end plate to bias the first substantially rectangular-shaped end plate toward the second substantially rectangular-shaped end plate.

2. The battery cell assembly of claim 1, wherein the first metal spring clip has a first predetermined length that is less than or equal to a distance from the first side of the first substantially rectangular-shaped end plate to the first side of the second substantially rectangular-shaped end plate.

3. The battery cell assembly of claim 1, wherein the first end portion of the first metal spring clip has a v-shaped cross-sectional profile.

4. The battery cell assembly of claim 3, wherein the first groove in the first substantially rectangular-shaped end plate has first and second groove portions, the first groove portion being disposed adjacent to and communicating with the second groove portion, the first groove portion extending from the first end of the first substantially rectangular-shaped end plate a predetermined distance toward the second end of the first substantially rectangular-shaped end plate, the first groove portion has a first depth, the second groove portion having a second depth greater than the first depth.

5. The battery cell assembly of claim 4, wherein an apex of the v-shaped cross-section profile contacts a bottom surface defined by the second groove portion of the first groove in the first substantially rectangular-shaped end plate.

6. The battery cell assembly of claim 5, wherein the first substantially flat portion of the first metal spring clip is disposed against a surface defined by the first groove portion of the first groove in the first substantially rectangular-shaped end plate.

7. The battery cell assembly of claim 1, wherein the substantially arcuate-shaped portion of the first metal spring clip has a second predetermined length such that the substantially arcuate-shaped portion extends from the first end of the first substantially rectangular-shaped end plate to the first end of the second substantially rectangular-shaped end plate.

8. The battery cell assembly of claim 1, further comprising a first frame member disposed between the first and second substantially rectangular-shaped end plates such that the first battery cell is disposed between and contacts the first substantially rectangular-shaped end plate and the first frame member.

9. The battery cell assembly of claim 8, wherein the substantially arcuate-shaped portion of the first metal spring clip is disposed away from the first frame member and does not contact the first frame member.

10. The battery cell assembly of claim 8, further comprising a second battery cell that is disposed between and contacts the first substantially rectangular-shaped end plate and the first frame member.

11. The battery cell assembly of claim 10, wherein the first frame member includes a rectangular ring-shaped body portion and a heat exchanger coupled to the rectangular ring-shaped body portion, the first and second battery cells being disposed against the heat exchanger.

12. A battery cell assembly, comprising:

a first substantially rectangular-shaped end plate having first and second sides, the first substantially rectangular-shaped end plate further having first and second grooves extending into the first side thereof that are disposed proximate to first and second ends respectively, of the first substantially rectangular-shaped end plate;

a second substantially rectangular-shaped end plate having first and second sides, the second substantially rectangular-shaped end plate further having first and second grooves extending into the first side thereof that are disposed proximate to first and second ends respectively, of the second substantially rectangular-shaped end plate;

a first battery cell being disposed and held between the first and second substantially rectangular-shaped end plates;

a first metal spring clip having first and second v-shaped end portions, the first v-shaped end portion of the first metal spring clip being disposed in the first groove of the first substantially rectangular-shaped end plate, and the second v-shaped end portion of the first metal spring clip being disposed in the first groove of the second substantially rectangular-shaped end plate to bias the first substantially rectangular-shaped end plate toward the second substantially rectangular-shaped end plate; and

a second metal spring clip having first and second v-shaped end portions, the first v-shaped end portion of the second metal spring clip being disposed in the second groove of the first substantially rectangular-shaped end plate and the second v-shaped end portion of the second metal spring clip being disposed in the second groove of the second substantially rectangular-shaped end plate to bias the first substantially rectangular-shaped end plate toward the second substantially rectangular-shaped end plate.

13. The battery cell assembly of claim 12, wherein the first groove in the first substantially rectangular-shaped end plate has first and second groove portions, the first groove portion being disposed adjacent to and communicating with the second groove portion, the first groove portion extending from the first end of the first substantially rectangular-shaped end plate a predetermined distance toward the second end of the first substantially rectangular-shaped end plate, the first groove portion has a first depth, the second groove portion having a second depth greater than the first depth.

14. The battery cell assembly of claim 13, wherein an apex of the first v-shaped end portion of the first metal spring clip contacts a bottom surface defined by the second groove portion of the first groove in the first substantially rectangular-shaped end plate.

15. The battery cell assembly of claim 14, wherein an apex of the first v-shaped end portion of the first metal spring clip contacts a bottom surface defined by the first groove in the first substantially rectangular-shaped end plate.

16. The battery cell assembly of claim 12, wherein the first metal spring clip further includes a substantially arcuate-shaped portion disposed between the first and second v-shaped end portions of the first metal spring clip.