# US 12,113,232 B2 · Battery pack

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- Number: US 12,113,232 B2
- Document ID: US12113232B2
- Status: Granted
- Kind: B2
- Application number: 17/473,073
- Filed: 2021-09-13
- Published: 2022-04-14
- Granted: 2024-10-08
- Earliest claimed: 2020-10-13
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Soodeok Moon; Byunghyun Lee; Younghwan Kwon; Jaepil Ahn; Jaehoon Kim; Jihyeon Lee
- Web page: https://patentgrep.com/patent/US12113232B2

## CPC

- H01M 50/284: with incorporated circuit boards, e.g. printed circuit boards [PCB]
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/298: characterised by the wiring of battery packs
- H01M 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)}
- H01B 7/0823: {Parallel wires, incorporated in a flat insulating profile}
- H01B 9/006: {Constructional features relating to the conductors}
- H05K 2201/10037: Printed or non-printed battery
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A battery pack including battery cells; a circuit unit connected to the battery cells; and a flexible wiring connecting the battery cells and the circuit unit to each other, wherein the flexible wiring includes a first end portion to which a plurality of conductive lines are physically bound; and a first group of conductive lines and a second group of conductive lines which extend from the first end portion, branch off from each other, and then extend in parallel to each other, and the first group of conductive lines includes a folded portion at a branching position at which the first group of conductive lines is separated from the second group of conductive lines.

## Claims

### Claim 1

A battery pack, comprising:
battery cells;
a circuit unit connected to the battery cells; and
a flexible wiring connecting the battery cells and the circuit unit to each other,
wherein:
the flexible wiring includes:
a first end portion to which a plurality of conductive lines are physically bound; and
a first group of conductive lines and a second group of conductive lines which extend from the first end portion, branch off from each other, and then extend in parallel to each other,
the first group of conductive lines includes a folded portion at a branching position at which the first group of conductive lines is separated from the second group of conductive lines,
the first group of conductive lines includes a first connection position, a second connection position, and a third connection position, each of the first to third connection positions being connected to a respective battery cell along a first direction,
at least one conductive line of the first group of conductive lines is connected at the first connection position, at least two conductive lines of the first group of conductive lines are connected together at the second connection position, and at least three conductive lines of the first group of conductive lines are connected together at the third connection position,
the at least two conductive lines connected together at the second connection position include a first conductive line and a second conductive line, the first conductive line including a first cut position at which the first conductive line is cut, the first cut position being between the first connection position and the second connection position such that the first connection position is electrically isolated from the second connection position along the first conductive line, and the second conductive line continuously extends from the second connection position to the first end portion, and
the at least three conductive lines connected together at the third connection position include the first conductive line, the second conductive line, and a third conductive line, the first conductive line and second conductive line including a second cut position at which the first conductive line and second conductive line are cut, the second cut position being between the second connection position and the third connection position such that the second connection position is electrically isolated from third connection position along the first and second conductive lines and the third conductive line continuously extends from the third connection position to the first end portion.

### Claim 2 (depends on 1)

The battery pack as claimed in claim 1, wherein the first group of conductive lines and the second group of conductive lines:
extend from the first end portion in a first direction,
are spaced apart from each other in a second direction crossing the first direction at the branching position, and
are connected to first and second electrodes at opposite sides of the battery cells in the second direction.

### Claim 3 (depends on 1)

The battery pack as claimed in claim 1, wherein the first to third connection positions are on a rear side of the folded portion, the rear side being opposite the first end portion in the first direction such that the folded portion is between the first to third connection positions and the first end portion.

### Claim 4 (depends on 1)

The battery pack as claimed in claim 1, further comprising a first connection member, a second connection member, and a third connection member, wherein the at least two conductive lines connected together at each of the first to third connection positions are connected together to the first to third connection members.

### Claim 5 (depends on 1)

The battery pack as claimed in claim 1, wherein the first conductive line includes a dummy line that does not transmit battery-cell state information obtained at the second connection position or the third connection position to the first end portion.

### Claim 6 (depends on 1)

The battery pack as claimed in claim 1, wherein:
the first conductive line is connected to the second conductive line through a bridge line between the first cut position and the second connection position.

### Claim 7 (depends on 1)

The battery pack as claimed in claim 1, wherein:
the at least two conductive lines connected together at the second connection position include a pair of the first conductive lines and a pair of the second conductive lines, and
the pair of second conductive lines includes parallel conductive lines which together transmit battery-cell state information obtained at the second connection position to the first end portion.

### Claim 8 (depends on 1)

The battery pack as claimed in claim 1, wherein:
the first conductive line is connected to the second conductive line through a bridge line, and
the first and second conductive lines electrically connected through the bridge line include parallel conductive lines which together transmit battery-cell state information obtained at the second connection position to the first end portion.

### Claim 9 (depends on 1)

The battery pack as claimed in claim 1, wherein the first group of conductive lines includes a direction-change cut position at which at least one conductive line is cut, the direction-change cut position being between the second and third connection positions in the first direction.

### Claim 10 (depends on 1)

The battery pack as claimed in claim 1, further comprising a first connection member at the first connection position, a second connection member at the second connection position, and a third connection member at the third connection position, wherein the first to third connection members each extend in a second direction crossing the first direction and are connected to the first group of conductive lines.

### Claim 11 (depends on 1)

The battery pack as claimed in claim 1, wherein at least one conductive line of the first group of conductive lines is directly connected, through a direction-change portion at one of the connection positions, to one of the battery cells or to a bus bar connected to the one of the battery cells.

### Claim 12 (depends on 11)

The battery pack as claimed in claim 11, wherein the first group of conductive lines includes a direction-change cut position at which the at least one conductive line is cut, the direction-change cut position being behind the direction-change portion in the first direction such that the direction-change portion is between the direction-change cut position and the first end portion.