# US 12,218,332 B2 · Battery pack comprising heat diffusion preventing member

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- Number: US 12,218,332 B2
- Document ID: US12218332B2
- Status: Granted
- Kind: B2
- Application number: 17/635,269
- Filed: 2020-11-18
- Published: 2022-09-15
- Granted: 2025-02-04
- Earliest claimed: 2019-12-05
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Chang Keun Son; Sang Yoon Jeong
- Web page: https://patentgrep.com/patent/US12218332B2

## CPC

- H01M 10/658: by thermal insulation or shielding
- H01M 10/613: Cooling or keeping cold
- H01M 10/625: Vehicles
- H01M 10/627: Stationary installations, e.g. power plant buffering or backup power supplies
- H01M 10/6553: Terminals or leads
- H01M 10/6555: arranged between the cells
- H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells
- 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)
- H01M 50/251: specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
- H01M 50/258: Modular batteries; Casings provided with means for assembling
- H01M 50/431: Inorganic material
- H01M 50/434: Ceramics
- H01M 50/505: comprising a single busbar
- H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
- H01M 50/593: Spacers; Insulating plates
- 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
- Y02E 60/10: Energy storage using batteries
- 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

## Abstract

A battery pack includes a heat diffusion preventing member. The battery pack can effectively prevent the diffusion of heat or fire generated in any one battery module from among battery modules accommodated in the battery pack, and can have various applications such as vehicles or power storage devices.

## Claims

### Claim 1

A battery pack comprising:
a pack receiving portion including a plurality of compartments divided by a vertical beam, and having an open top surface;
a battery module accommodated in each compartment of the pack receiving portion;
a lead assembly covering a top surface of the pack receiving portion and having a slit formed in an area corresponding to an upper end of the vertical beam; and
a heat diffusion preventing member inserted into the slit of the lead assembly and mounted on the upper end of the vertical beam.

### Claim 2 (depends on 1)

A battery pack of claim 1, wherein the heat diffusion preventing member comprises:
a vertical body mounted on the upper end of the vertical beam; and
a horizontal body formed on an upper end of the vertical body and formed with an area larger than the slit formed in the lead assembly.

### Claim 3 (depends on 2)

The battery pack of claim 2, wherein the vertical body includes two plate-shaped members parallel to each other, and
wherein the upper end of the vertical beam is inserted between the two plate-shaped members.

### Claim 4 (depends on 1)

The battery pack of claim 1, wherein a height of the vertical beam is in a range of 50 to 80% of a height of the battery module accommodated in the pack receiving portion, and
wherein the heat diffusion preventing member extends from the upper end of the vertical beam to shield a spaced distance to the lead assembly.

### Claim 5 (depends on 1)

The battery pack of claim 1, wherein the heat diffusion preventing member is formed of a silicate-containing inorganic material.

### Claim 6 (depends on 1)

A battery pack of claim 1, wherein the heat diffusion preventing member is formed of a component represented by a following formula chemical formula 1:
X2Y4-6Z8O20(OH,F)4 Chemical formula 1
where, in the above chemical formula 1,
X is at least one of K, Na and Ca;
Y is at least one of Al, Mg and Fe; and
Z is at least one of Si and Al.

### Claim 7 (depends on 5)

The battery pack of claim 5, wherein the heat diffusion preventing member is formed of a mica sheet.

### Claim 8 (depends on 1)

The battery pack of claim 1, wherein each battery module comprises:
a plurality of battery cells in which electrode tabs are oriented in one direction;
a module frame in which the plurality of battery cells are accommodated; and
a bus bar electrically connected to the electrode tabs and extending and protruding toward an external side of the module frame.

### Claim 9 (depends on 8)

The battery pack of claim 8, wherein the battery module further comprises an electrode lead, and
wherein a first end of the electrode lead is connected to the electrode tabs, and a second end is connected to the bus bar.

### Claim 10 (depends on 8)

The battery pack of claim 8, wherein the bus bar has a bent portion extending over a top of the module frame, and
wherein a silicate-containing inorganic sheet is positioned between a top surface of the battery module and the bent portion of the bus bar.

### Claim 11 (depends on 8)

The battery pack of claim 8, wherein the bus bar is an inter bus bar that electrically connects adjacent battery modules.

### Claim 12 (depends on 10)

The battery pack of claim 10, wherein the silicate-containing inorganic sheet is a mica sheet.

### Claim 13 (depends on 1)

An automobile comprising the battery pack according to claim 1.

### Claim 14 (depends on 1)

A power storage device comprising the battery pack according to claim 1.