Secondary battery

Patent metadata

Field	Value
Publication number	US-11196094-B2
Application number	US-201615277222-A
Country	US
Kind code	B2
Filing date	Sep 27, 2016
Priority date	Sep 30, 2015
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A secondary battery includes: a main body accommodating an electrode assembly; a sealing part formed along an outer periphery of the main body and including an upwardly bent part; and a circuit board connected to an electrode lead extending outward from the main body and arranged between the main body and the bent part of the sealing part. The secondary battery is suitable for providing a compact structure.

First claim

What is claimed is:

1. A secondary battery comprising:
a case comprising:
a main body defining an interior configured to accommodate an electrode assembly, the electrode assembly having a thickness defined in a first direction, and
a sealing part formed along an outer periphery of the main body and comprising an upwardly bent part extending in a second direction substantially parallel to the first direction, wherein the sealing part comprises a terrace part from which an electrode lead extends outward and first and second sides formed on opposing sides of the main body, and wherein the electrode lead extends outward from a surface of the main body;

a circuit board connected to the electrode lead and arranged outside of the interior of the main body and between the main body and the bent part, wherein the bent part faces the surface of the main body;
an external terminal formed on an opposing side of the main body with respect to the circuit board and electrically connected to the circuit board, the external terminal extending from the main body in a third direction substantially perpendicular to the first and second directions; and
a pair of sealing members formed on opposing sides of the electrode lead and interposed between the electrode lead and the sealing part,
wherein the pair of sealing members are formed at least partially within the bent part,
wherein the sealing part is not formed along a folding-type joint part of the main body,
wherein the folding-type joint part is parallel to the terrace part and the folding-type joint part and the terrace part are formed on opposing sides of the main body,
wherein a length of the folding-type joint part is greater than lengths of each of the terrace part and the first and second sides,
wherein the external terminal is formed adjacent to the folding-type joint part and on an opposing side of the main body with respect to the terrace part, and
wherein the external terminal is arranged to be substantially flat along the third direction and the circuit board is arranged to be substantially flat along the first direction.

2. The secondary battery of claim 1 , wherein the bent part of the sealing part and the surface of the main body from which the electrode lead extends are perpendicular to a bottom surface of the circuit board.

3. The secondary battery of claim 1 , wherein the sealing part is formed along all sides of the secondary battery surrounding the main body except for the folding-type joint part.

4. The secondary battery of claim 3 , wherein a thermistor is arranged on the circuit board or the terrace part adjacent to the circuit board so as to measure a temperature of the secondary battery.

5. The secondary battery of claim 3 , wherein the secondary battery has a hexagonal shape, and
the sealing part is formed along five sides of the secondary battery except for the folding-type joint part.

6. The secondary battery of claim 5 , wherein a main surface of the secondary battery that is largest among surfaces of the secondary battery has a hexagonal shape.

7. The secondary battery of claim 5 , wherein the main body has a hexagonal shape.

8. The secondary battery of claim 5 , wherein the first side and the second side extend in a direction substantially perpendicular to the terrace part.

9. The secondary battery of claim 8 , wherein a third side and a fourth side are arranged between the terrace part and the first and second sides at an oblique angle from the terrace part.

10. The secondary battery of claim 9 , wherein the first and second sides form longest sides of the secondary battery except for the folding-type joint part.

11. The secondary battery of claim 9 , wherein the third and fourth sides form shortest sides of the secondary battery.

12. The secondary battery of claim 1 , wherein the circuit board is arranged in an upright position between the main body and the bent part of the sealing part.

13. The secondary battery of claim 1 , further comprising a wiring part connecting the circuit board to the external terminal,
wherein the circuit board and the wiring part are arranged in an upright position between the main body and different bent parts of the sealing part.

14. A secondary battery comprising:
a case comprising:
a main body defining an interior configured to accommodate an electrode assembly, the electrode assembly having a thickness defined in a first direction, and
a sealing part formed along the periphery of the main body and comprising a plurality of upwardly bent parts, a first one of the upwardly bent parts extending in a second direction substantially parallel to the first direction, wherein the sealing part comprises a terrace part from which an electrode lead extends outward and first and second sides formed on opposing sides of the main body, and wherein the electrode lead extends outward from a surface of the main body;

a circuit board connected to the electrode lead and arranged outside of the interior of the main body and between the main body and a first upwardly bent part of the sealing part, wherein the plurality of upwardly bent parts include at least the first upwardly bent part and a second upwardly bent part that are spaced apart from each other by a portion of the sealing part that is not upwardly bent, wherein the first upwardly bent part of the sealing part faces the surface of the main body from which the electrode lead extends;
an external terminal formed on an opposing side of the main body with respect to the circuit board and electrically connected to the circuit board, the external terminal extending from the main body in a third direction substantially perpendicular to the first and second directions; and
a pair of sealing members formed on opposing sides of the electrode lead and interposed between the electrode lead and the sealing part,
wherein the pair of sealing members are formed at least partially within the first upwardly bent part,
wherein the sealing part is not formed along a folding-type joint part of the main body,
wherein the folding-type joint part is parallel to the terrace part and the folding-type joint part and the terrace part are formed on opposing sides of the main body,
wherein a length of the folding-type joint part is greater than lengths of each of the terrace part and the first and second sides,
wherein the external terminal is formed adjacent to the folding-type joint part and on an opposing side of the main body with respect to the terrace part, and
wherein the external terminal is arranged to be substantially flat along the third direction and the circuit board is arranged to be substantially flat along the first direction.

15. The secondary battery of claim 14 , wherein the main body defines a hexagonal shape and the plurality of upwardly bent parts further include a third upwardly bent part and wherein the first upwardly bent part is separated from the second and third upwardly bent parts by first and second edges of the hexagonal sealing part that are not bent.

16. The secondary battery of claim 15 , wherein the circuit board is positioned on the terrace part so as to be interposed between the first bent part and the main body.

17. The secondary battery of claim 16 , wherein the folding part does not have a sealing part attached thereto.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Yun Youngkwang

Classifications

• H01M10/486

  for measuring temperature · CPC title

• H01M50/557

  Plate-shaped terminals · CPC title

• H01M50/102

  characterised by their shape or physical structure · CPC title

• H01M50/552

  characterised by their shape · CPC title

• H01M50/103 Primary

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title