Interconnecting member occupying less space in battery module and battery module comprising same

Patent metadata

Field	Value
Publication number	US-10903469-B2
Application number	US-201716067395-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Aug 24, 2016
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

Provided is an interconnection member including: (a) a main cable made of a flexible flat cable (FFC) including a plurality of copper wires; (b) a plurality of terminal parts branched from the main cable and electrically connected to at least one of the copper wires of the main cable, the plurality of terminal parts being connected to the bus bars to sense voltages of the battery cells; (c) a connecting part formed on one-side end of the main cable, and electrically and mechanically connected to the PCB; and (d) at least one temperature sensing part branched from the main cable, adjacent to the connecting part, while sharing at least one of the copper wires of the main cable.

First claim

The invention claimed is:

1. An interconnection member for connecting bus bars which are coupled to a printed circuit board (PCB) of a battery module and electrode terminals of battery cells, the interconnection member comprising:
(a) a main cable made of a flexible flat cable (FFC) including a plurality of copper wires;
(b) a plurality of terminal parts branched from the main cable and electrically connected to at least one of the plurality of copper wires of the main cable, the plurality of terminal parts being connected to the bus bars to sense voltages of the battery cells;
(c) a connecting part formed on one-side end of the main cable, and electrically and mechanically connected to the PCB; and
(d) at least one temperature sensing part branched from the main cable, adjacent to the connecting part, while sharing at least one of the plurality of copper wires of the main cable;
wherein at least two of (b) to (d) are made of an FFC,
wherein the at least one temperature sensing part comprises:
a first extending part extending from the main cable while sharing at least one copper wire of the plurality of copper wires of the main cable; and
a ceramic thermistor disposed on an end of the first extending part while being electrically connected to the first extending part,
wherein the plurality of terminal parts and the at least one temperature sensing part branched from the main able are short-circuited to each other so that the plurality of copper wires of the main cable, which are respectively shared by the plurality of terminal parts and the at least one temperature sensing, are short-circuited to each other,
wherein each of the plurality of terminal parts comprises:
a second extending part that extends from two sides of the main cable, respectively while being spaced from each other at a predetermined distance so as to result in a symmetrical configuration based on the main cable; and
a contact part that is electrically connected to the second extending part and contacts a voltage sensing terminal provided in the bus bars, and

wherein the second extending part is an FFC that extends from the main cable while sharing at least one copper wire of the plurality of copper wires of the main cable.

2. The interconnection member of claim 1 , wherein the connecting part is made of an FFC so as to be electrically and mechanically coupled to an FFC connector provided in the PCB.

3. The interconnection member of claim 1 , wherein the first extending part is made of an FFC, and the ceramic thermistor is attached to an outer surface of a battery cell of the plurality of battery cells.

4. The interconnection member of claim 3 , wherein a temperature is sensed by detecting a change in current that flows from the ceramic thermistor to the PCB via the first extending part and the connecting part.

5. The interconnection member of claim 1 , wherein the connecting part extends from the main cable while sharing all of the plurality of copper wires of the main cable.

6. The interconnection member of claim 1 , wherein the second extending part is a wire coupled to at least one copper wire of the plurality of copper wires of the main cable by means of soldering.

7. The interconnection member of claim 1 , wherein the contact part has a ring shape so that the contact part is inserted and fastened to the voltage sensing terminal in a riveting manner.

8. The interconnection member of claim 1 , wherein the contact part is made of a plate-shaped plate so that the contact part is inserted and fastened to the voltage sensing terminal in a clamping manner.

9. The interconnection member of claim 1 , wherein, through the clamping manner, a plurality of voltage sensing terminals are pressed and deformed, in a state in which the contact part is disposed between the plurality of voltage sending terminals, to be mechanically fastened to the contact part.

10. The interconnection member of claim 1 , wherein the contact part is made of a ring- or plate-shaped metal plate so that the contact part is coupled to the voltage sensing terminal by means of soldering or laser welding.

11. The interconnection member of claim 1 , wherein a first clamping part is coupled to the main cable in a clamping manner, as a configuration in which the second extending part is electrically connected to the plurality of copper wires of the main cable, and
wherein the contact part comprises:
branched wires which are branched from an end of the first clamping part;
a second clamping part coupled to the branched wires in a clamping manner; and
a plate-shaped plate contacting end which extends from the second clamping part and through which the contact part is coupled to the voltage sensing terminal by means of soldering or laser welding.

12. A battery module comprising:
the interconnection member of claim 1 ;
a module laminated body in which at least two battery cells are laterally arranged; and
a bus bar assembly that electrically connects electrode terminals of battery cells disposed on at least one of a front surface and a rear surface of the module laminated body.

13. The battery module of claim 12 , wherein the bus bar assembly comprises:
the bus bars respectively coupled to the electrode terminals of the battery cells; and
a main frame on which the bus bars are fixed and the PCB is mounted.

14. The battery module of claim 12 , wherein the interconnection member is fixed to the module laminated body in such a manner that the main cable is attached, along an outer surface of the module laminated body, by means of an insulating film or an adhesive.

15. A device comprising the battery module of claim 12 .

Assignees

• Lg Chemical Ltd

Inventors

• Ju Jae Hyeon
• Park Jin Hong
• Ma Sang Hyuk
• Ahn Hyung Jun
• Kim Bo Hyon

Classifications

• H01R12/59 Primary

  for flexible printed circuits, flat or ribbon cables or like structures · CPC title

• H01M50/287

  Fixing of circuit boards to lids or covers · CPC title

• H01M50/516

  by welding, soldering or brazing · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/247

  specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers · CPC title