# US 12,015,216 B2 · Interconnecting member occupying less space in battery module and battery module comprising same

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- Number: US 12,015,216 B2
- Document ID: US12015216B2
- Status: Granted
- Kind: B2
- Application number: 17/126,556
- Filed: 2020-12-18
- Published: 2021-04-08
- Granted: 2024-06-18
- Earliest claimed: 2016-08-24
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jae Hyeon Ju; Jin Hong Park; Sang Hyuk Ma; Hyung Jun Ahn; Bo Hyon Kim
- Web page: https://patentgrep.com/patent/US12015216B2

## CPC

- H01R 12/59: for flexible printed circuits, flat or ribbon cables or like structures
- G01R 31/36: Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H01M 10/486: {for measuring temperature}
- H01M 50/211: adapted for pouch cells
- H01M 50/287: Fixing of circuit boards to lids or covers
- H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
- H01M 50/516: by welding, soldering or brazing
- H01M 50/519: comprising printed circuit boards [PCB]
- H01M 50/522: Inorganic material
- H01R 9/22: Bases, e.g. strip, block, panel {(for printed circuits H01R12/50)}
- H01R 11/28: End pieces consisting of a ferrule or sleeve
- H01M 50/247: specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
- H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64)
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

What is discussed is an interconnection member including (a) a main cable made of a flexible flat cable (FFC) including copper wires, (b) terminal parts branched from the main cable and electrically connected to at least one of the copper wires of the main cable, (c) a connecting part formed on one-side end of the main cable, and electrically and mechanically connected to a PCB and (d) at least one temperature sensing part branched from the main cable, 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 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.

## Claims

### Claim 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 wires;
(b) a plurality of terminal parts branched from the main cable and electrically connected to at least one wire of the plurality of 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 the at least one wire of the plurality of 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 the at least one wire of the plurality of 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, and
wherein the temperature sensing part is proximal to the connecting part and the terminal parts are distal to the connecting part in the main cable.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

The interconnection member of claim 1, 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.

### Claim 4 (depends on 1)

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

### Claim 5

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 wires;
(b) a plurality of terminal parts branched from the main cable and electrically connected to at least one wire of the plurality of 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 the at least one wire of the plurality of 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 the at least one wire of the plurality of 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 each of the plurality of terminal parts comprises:
a second extending part that extends from 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.

### Claim 6 (depends on 5)

The interconnection member of claim 5, wherein the second extending part is an FFC that extends from the main cable while sharing the at least one wire of the plurality of wires of the main cable.

### Claim 7

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 wires;
(b) a plurality of terminal parts branched from the main cable and electrically connected to at least one wire of the plurality of 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 the at least one wire of the plurality of 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 the at least one wire of the plurality of 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 each of the plurality of terminal parts comprises:
a second extending part that extends from 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 a wire coupled to the at least one wire of the plurality of wires of the main cable by means of soldering.

### Claim 8 (depends on 1)

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 a front surface and/or a rear surface of the module laminated body.

### Claim 9 (depends on 8)

The battery module of claim 8, 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.

### Claim 10 (depends on 8)

The battery module of claim 8, 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.

### Claim 11 (depends on 8)

A device comprising the battery module of claim 8.