# US 10,320,036 B2 · Voltage sensing assembly and battery module including the same

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- Number: US 10,320,036 B2
- Document ID: US10320036B2
- Status: Granted
- Kind: B2
- Application number: 15/023,271
- Filed: 2014-09-26
- Published: 2016-10-27
- Granted: 2019-06-11
- Earliest claimed: 2013-09-26
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jung Oh Moon; Dal Mo Kang; Jong Woon Choi; Jun Yeob Seong; Byung O Kong; Youngsop Eom
- Web page: https://patentgrep.com/patent/US10320036B2

## CPC

- H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries}
- G01R 31/364: Battery terminal connectors with integrated measuring arrangements
- G01R 31/3835: involving only voltage measurements
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H01M 50/124: having a layered structure
- H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells
- H01M 50/224: Metals
- H01M 50/227: Organic material
- H01M 50/231: having a layered structure
- H01M 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
- H01M 50/284: with incorporated circuit boards, e.g. printed circuit boards [PCB]
- H01M 50/296: characterised by terminals of battery packs (terminals of batteries H01M50/543)
- H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
- H01M 50/519: comprising printed circuit boards [PCB]
- H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection
- H01M 50/569: Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals (battery terminal connectors with integrated measuring arrangements G01R31/364)
- H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing}
- H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller}
- H01M 2220/10: Batteries in stationary systems, e.g. emergency power source in plant
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed herein is a voltage sensing assembly including sensing bus bars connected to series connection portions of battery cells for sensing the voltage of the battery cells, a printed circuit board (PCB), to the upper part of which the sensing bus bars are and to the lower part of which a connector is coupled, the connector mounted on the PCB, an insulative mounting member including a receiving part having a shape corresponding to the shape of the PCB such that the PCB is mounted in the receiving part, the receiving part being provided at one side thereof with openings, through which the sensing bus bars extend, and an insulation sheet attached to the front surface of the PCB.

## Claims

### Claim 1

A voltage sensing assembly configured to be mounted to a battery module comprising a plurality of battery cells connected in series to each other for measuring voltage of the battery cells, the voltage sensing assembly comprising:
sensing bus bars configured to be connected to series connection portions of the battery cells for sensing the voltage of the battery cells;
a printed circuit board (PCB), to an upper part of which the sensing bus bars are coupled in a state in which the sensing bus bars are arranged at equal intervals and to a lower part of which a connector is coupled;
the connector mounted on the PCB for transmitting the sensed voltage to a battery management system (BMS);
an insulative mounting member having a cross-sectional shape of an interior surface thereof that is substantially equal in size to a cross-sectional shape of the PCB when viewed from a front view of the insulative mounting member and the PCB, wherein the PCB is mounted in the insulative mounting member, and wherein the insulative mounting member is provided at a top surface thereof with openings through which the sensing bus bars extend; and
an insulation sheet, separate from the insulative mounting member, having a cross-sectional shape substantially the same as the cross-sectional shape of the PCB, the insulation sheet being provided with an opening having a shape substantially the same as a shape of the connector, and the insulation sheet being attached to a front surface of the PCB.

### Claim 2 (depends on 1)

The voltage sensing assembly according to claim 1, wherein the sensing bus bars are coupled to the PCB using surface mounting technology (SMT).

### Claim 3 (depends on 1)

The voltage sensing assembly according to claim 1, wherein the sensing bus bars are connected to the series connection portions of the battery cells by welding.

### Claim 4 (depends on 1)

The voltage sensing assembly according to claim 1, wherein the PCB is formed to have a plate shape, and the voltage sensing assembly is configured such that a length of an upper end of the voltage sensing assembly is equivalent to a width of the battery module.

### Claim 5 (depends on 4)

The voltage sensing assembly according to claim 4, wherein the voltage sensing assembly is configured such that a length of a lower end of the voltage sensing assembly is equivalent to 60% to 80% the length of the upper end of the voltage sensing assembly.

### Claim 6 (depends on 1)

The voltage sensing assembly according to claim 1, wherein the insulative mounting member is mounted to the battery module in a state in which the insulative mounting member is in tight contact with electrode terminals of the battery cells at one side of each of the battery cells.

### Claim 7 (depends on 1)

The voltage sensing assembly according to claim 1, wherein the insulative mounting member comprises a sidewall formed along an outer edge thereof and provided at a rear surface thereof.

### Claim 8 (depends on 1)

A battery module comprising:
a voltage sensing assembly according to claim 1;
a battery cell stack comprising a plurality of battery cells, the battery cells being sequentially stacked;
a pair of end plates mounted to outermost sides of the battery cell stack;
external input and output terminals connected to electrode terminals of outermost battery cells of the battery cell stack; and
a BMS mounted to one surface of the battery cell stack.

### Claim 9 (depends on 8)

The battery module according to claim 8, wherein each of the battery cells is configured to have a structure in which an electrode assembly is mounted in a battery case made of a laminate sheet comprising a metal layer and a resin layer, and an outer edge of the battery case is sealed.

### Claim 10 (depends on 8)

The battery module according to claim 8, wherein each of the battery cells is mounted in a battery cartridge configured to have a frame structure.

### Claim 11 (depends on 10)

The battery module according to claim 10, wherein the cartridge comprises a pair of plate-shaped frames configured to fix an outer edge of a corresponding one of the battery cells in a state in which at least one side surface of the battery cell is open.

### Claim 12 (depends on 8)

The battery module according to claim 8, wherein each of the battery cells is a lithium secondary battery.

### Claim 13 (depends on 8)

A battery pack comprising one or more battery modules according to claim 8.

### Claim 14 (depends on 13)

A device comprising a battery pack according to claim 13 as a power source.

### Claim 15 (depends on 14)

The device according to claim 14, wherein the device is selected from a group consisting of a mobile phone, a portable computer, a smart phone, a smart pad, a netbook computer, a light electronic vehicle (LEV), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage apparatus.