Battery pack including unit cells, temperature detection device, and protection circuit module connected to substrate

Patent metadata

Field	Value
Publication number	US-10069174-B2
Application number	US-201414295424-A
Country	US
Kind code	B2
Filing date	Jun 4, 2014
Priority date	Jul 9, 2013
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A battery pack includes a plurality of unit cells, a substrate electrically connected to the unit cells, a temperature protection device on the substrate, and a protection circuit module electrically connected to the substrate. The temperature protection device includes at least one metal contact electrically connected to the substrate. The substrate includes at least one hole at a location corresponding to the at least one metal contact. A width of the substrate is substantially equal to or less than widths of surfaces of the unit cells overlapping the substrate.

First claim

What is claimed is:

1. A battery pack, comprising:
at least one tap;
a plurality of unit cells;
a substrate electrically connected to the unit cells;
at least one temperature protection device on the substrate; and
a protection circuit electrically connected to the substrate,
wherein the at least one tap bends so that a surface of the substrate including the at least one temperature protection device faces upper surfaces of the unit cells,
a bending axis of the at least one tap being parallel to a direction in which the unit cells are arranged,
wherein the at least one temperature protection device includes at least one metal contact electrically connected to the substrate and welded to the at least one tap, and
wherein the substrate includes at least one hole at a location corresponding to the at least one metal contact,
the at least one hole overlapping the at least one metal contact and the at least one tap.

2. The battery pack as claimed in claim 1 , wherein a diameter of the at least one hole is less than substantially 40% of a width of the substrate.

3. The battery pack as claimed in claim 1 , wherein the at least one hole includes a plurality of holes arranged in a length direction of the substrate.

4. The battery pack as claimed in claim 1 , wherein the substrate includes one or more heat radiation holes corresponding to the at least one hole located adjacent the at least one temperature protection device.

5. The battery pack as claimed in claim 1 , further comprising: a heat absorption plate between the substrate and the at least one temperature protection device.

6. The battery pack as claimed in claim 1 , wherein:
the at least one temperature protection device is on a first surface of the substrate,
the first surface of the substrate faces first surfaces of the unit cells, and
the protection circuit is disposed adjacent to second surfaces of the unit cells.

7. The battery pack as claimed in claim 1 , wherein the substrate is a printed circuit board.

8. The battery pack as claimed in claim 7 , wherein the substrate includes:
a plurality of metal layers, each including a circuit pattern; and
a plurality of insulating layers between respective pairs of the metal layers.

9. The battery pack as claimed in claim 1 , wherein:
the at least one tap includes a plurality of taps,
the at least one temperature protection device includes a plurality of temperature protection devices, each of the temperature protection devices having at least one metal contact,
the taps electrically connect the unit cells to the at least one metal contact of respective ones of the temperature protection devices on the substrate,
a first side of each of the taps is connected to a respective one of the at least one metal contact and a second side of each of the taps is connected to one of the unit cells, and
each of the taps is bent to connect the first and second sides.

10. The battery pack as claimed in claim 9 , wherein each of the taps includes a first notch corresponding to a bending position of the tap.

11. The battery pack as claimed in claim 9 , further comprising:
a plurality of leads to electrically connect the substrate to the protection circuit,
wherein widths of the substrate at locations where the leads are attached are less than a width at one or more other locations of the substrate.

12. A battery pack, comprising:
a plurality of unit cells;
a substrate electrically connected to the unit cells;
at least one temperature protection device on the substrate;
a plurality of taps electrically connecting the unit cells to the substrate; and
a protection circuit electrically connected to the substrate,
wherein each tap includes a first side connected to a first surface of the substrate and a second side connected to a first surface of one of the unit cells,
wherein each tap is bent to allow the first surface of the substrate to face the first surfaces of the unit cells,
a bending axis of the at least one tap being parallel to a direction in which the unit cells are arranged,
wherein the at least one temperature protection device includes a metal contact that contact the first side of at least one of the taps,
wherein the substrate includes at least one hole at a location corresponding to the metal contact,
the at least one hole overlapping the metal contact and the at least one of the taps.

13. The battery pack as claimed in claim 12 , wherein a diameter of the at least one hole is less than 40% of a width of the substrate.

14. The battery pack as claimed in claim 12 , wherein the at least one hole includes a plurality of holes arranged in a length direction of the substrate.

15. The battery pack as claimed in claim 12 , wherein the substrate includes a heat radiation hole corresponding to the at least one temperature protection device and the at least one hole.

16. The battery pack as claimed in claim 12 , further comprising:
a heat absorption plate between the substrate and the at least one temperature protection device.

17. The battery pack as claimed in claim 12 , wherein:
the first surface of each unit cell is an upper surface of the unit cell,
each unit cell includes an anode and a cathode on the upper surface, and
each unit cell includes a second surface that is a front surface or a rear surface of the unit cell.

18. The battery pack as claimed in claim 12 , further comprising:
a lead connecting the substrate to the protection circuit,
wherein the lead has a first side connected to the protection circuit and a second side connected to the first surface of the substrate, and
the lead is bent to allow the protection circuit to be disposed adjacent to a second surface of at least one of the unit cells.

19. The battery pack as claimed in claim 18 , wherein the substrate includes:
a width of a first section of the substrate is less than a width of a second section of the substrate, and
the lead is connected to the first section of the substrate.

20. The battery pack as claimed in claim 19 , wherein:
each tap includes bending position including a first notch, and
the lead includes a bending position including a second notch.

21. A battery pack, comprising:
a substrate;
a first unit cell;
a second unit cell; and
a protection circuit on the substrate; and
first and second taps between the substrate and respective ones of the first and second unit cells,
wherein each of the first and second taps is bent at a predetermined angle to electrically connect different metal layers within the substrate to the first and second unit cells,
a bending axis of each of the first and second taps being parallel to a direction in which the first and second unit cells are arranged,
the different metal layers vertically spaced and overlapping one another, and
wherein a width of the substrate is substantially equal to or less than width of surfaces of the first and second unit cells overlapping the substrate.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Wang han-jun
• Moon Dae-Yon

Classifications

• H01M50/516

  by welding, soldering or brazing · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title

• H01M50/519

  comprising printed circuit boards [PCB] · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M2200/10

  Temperature sensitive devices · CPC title