# US 11,909,018 B2 · Battery pack

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,909,018 B2
- Document ID: US11909018B2
- Status: Granted
- Kind: B2
- Application number: 17/328,357
- Filed: 2021-05-24
- Published: 2021-11-25
- Granted: 2024-02-20
- Earliest claimed: 2020-05-25
- Assignees: Chongqing Jinkang Power New Energy Co., Ltd.
- Applicants: Chongqing Jinkang Power New Energy Co., Ltd.
- Inventors: Shengchang Guo; Qijun Liang; Jianxiong Zhao; Xing Wang; Xiujun Long; Zhankui Ren; Zimu Liao; Renzhang Xiao; Xunzhao Xia; Jian He; Shuang Zhang; Guangyi Liu
- Web page: https://patentgrep.com/patent/US11909018B2

## CPC

- H01M 10/613: Cooling or keeping cold
- H01M 50/207: characterised by their shape
- A62C 3/16: in electrical installations, e.g. cableways
- 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 10/486: {for measuring temperature}
- H01M 10/625: Vehicles
- H01M 10/63: Control systems (charging or discharging in response to temperature H01M10/44 {, H01M10/443}; measurement of temperature H01M10/48 {, H01M10/486})
- H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552)
- H01M 10/6568: characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
- H01M 10/658: by thermal insulation or shielding
- 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 50/293: characterised by the material
- H01M 2200/10: Temperature sensitive devices
- H01M 2200/20: Pressure-sensitive devices
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure provides a battery pack, comprising: battery cells; a coolant tank for storing a coolant; a cooling circuit in communication with the coolant tank; a driving device for driving the coolant to flow; and a fire extinguishing pipeline connected to the cooling circuit; wherein, the fire extinguishing pipeline includes: a spraying pipe extending above the battery cells and forming an opening after being heated.

## Claims

### Claim 1

A battery pack, comprising:
battery cells;
a coolant tank for storing a coolant;
a cooling circuit in communication with the coolant tank;
a driving device for driving the coolant to flow;
a fire extinguishing pipeline connected to the cooling circuit, wherein the fire extinguishing pipeline comprises a spraying pipe extending above the battery cells and forming an opening after being heated; and
partitions provided between the battery cells and between battery modules, wherein the partitions have a characteristic of absorbing the coolant, the partitions comprise a heat insulation layer body for delaying heat spread, and the heat insulation layer body comprises an absorption layer for absorbing the coolant and a reinforcing layer, and
wherein:
the absorption layer is disposed on one single side of the reinforcing layer and faces the battery cells; or
the heat insulation layer body further comprises a second absorption layer and the absorption layer and the second absorption layer are disposed on opposite sides of the reinforcing layer.

### Claim 2 (depends on 1)

The battery pack of claim 1, wherein, a three-way junction or a control switch is provided at a joint of the fire extinguishing pipeline with the cooling circuit, and the control switch controls the coolant tank to be in communication with the cooling circuit and the fire extinguishing pipeline in an alternative way.

### Claim 3 (depends on 1)

The battery pack of claim 1, wherein, one end of the spraying pipe is for the coolant to flow in and a second end is sealed.

### Claim 4 (depends on 2)

The battery pack of claim 2, wherein, the control switch is a three-way valve, which controls the coolant tank and the cooling circuit to be normally open therebetween.

### Claim 5 (depends on 2)

The battery pack of claim 2, wherein, the control switch comprises a first two-way valve and a second two-way valve; wherein the first two-way valve is arranged on the fire extinguishing pipeline; and the second two-way valve is arranged on the cooling circuit and is positioned downstream of the joint of the fire extinguishing pipeline with the cooling circuit.

### Claim 6 (depends on 3)

The battery pack of claim 3, wherein, the fire extinguishing pipeline further comprises a collecting pipe; and a plurality of spraying pipes are arranged in parallel and are in communication with the collecting pipe.

### Claim 7 (depends on 1)

The battery pack of claim 1, wherein, the battery pack further comprises a housing for receiving the battery cells; and an inner side of a top of the housing is provided with a fire-proof layer resistant to high temperature and thermal impact, and the fire-proof layer is made of a non-water-absorbing, fire-proof, and impact-resistant material.

### Claim 8 (depends on 1)

The battery pack of claim 1, wherein the partitions are configured to absorb the coolant after high-temperature calcination.

### Claim 9 (depends on 1)

The battery pack of claim 1, wherein, the absorption layer is made of a porous material, comprising one or more of a group consisting of glass fiber material, high silica glass fiber material, ceramic fiber material, hollow microbeads, aerogel, polyacrylonitrile fiber, melamine cotton, melamine open-cell foam, and polyurethane open-cell foam; or the absorption layer is made of a material comprising one or more of mica or silicon rubber, which forms a porous substance after being calcinated at high temperature.

### Claim 10 (depends on 1)

The battery pack of claim 1, wherein, a thermal foaming layer is disposed between the reinforcing layer and the absorption layer; a foaming expansion factor of the thermal foaming layer is greater than 1.

### Claim 11 (depends on 1)

The battery pack of claim 1, wherein, the partitions further comprise a wrapping layer for wrapping the heat insulation layer body to prevent internal chips and fibers from escaping from the partitions; wherein, the wrapping layer is damaged after being heated.

### Claim 12 (depends on 11)

The battery pack of claim 11, wherein, an interior of the wrapping layer is vacuum treated.

### Claim 13 (depends on 1)

The battery pack of claim 1, wherein, the coolant tank is one or more of a group consisting of a antifreeze liquid tank, a glass cleaning agent kettle, and a fire extinguishing agent storage tank of a vehicle, and liquid or agents with cooling and fire extinguishing effects are stored in the coolant tank;
the driving device is configured to drive the liquid and agents in the coolant tank to flow after receiving a signal generated by thermal runaway;
the signal is provided by an alarm device, and the alarm device comprises one or more sensing devices from a group consisting of a smoke sensor, a gas pressure sensor, a temperature sensor, a voltage sensor, and a gas component sensor, wherein the alarm device converts a physical signal into an electrical signal when receiving one or more physical signals from a group consisting of aerosols, rising dust concentration, rising air pressure in the battery pack, rising temperature, decreasing cell voltage, CO, and H2 gas.