# US 12,015,135 B2 · Lithium ion batteries and battery modules

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- Number: US 12,015,135 B2
- Document ID: US12015135B2
- Status: Granted
- Kind: B2
- Application number: 17/259,469
- Filed: 2019-05-29
- Published: 2022-02-17
- Granted: 2024-06-18
- Earliest claimed: 2019-05-07
- Assignees: State Grid Jiangsu Electric Power Co., Ltd. Research Institute; Jiangsu Electric Power Research Institute Co., Ltd.
- Applicants: State Grid Jiangsu Electric Power Research Institute; Jiangsu Electric Power Research Institute Co., Ltd.
- Inventors: Hongbin Zhu; Xiaoqin Zhang; Xiang Yu
- Web page: https://patentgrep.com/patent/US12015135B2

## CPC

- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552)
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/4207: {for several batteries or cells simultaneously or sequentially}
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H01M 10/486: {for measuring temperature}
- H01M 10/613: Cooling or keeping cold
- H01M 10/6563: with forced flow, e.g. by blowers
- H01M 50/116: characterised by the material
- H01M 50/358: External gas exhaust passages located on the battery cover or case
- H01M 50/383: Flame arresting or ignition-preventing means
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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

Lithium ion batteries and battery modules are disclosed. The lithium ion battery includes a housing where a positive electrode, a negative electrode, and an electrolyte are provided. Some of the areas of the housing are made from the fusible material. When the temperature in the housing exceeds a set threshold, the area, made from the fusible material, on the housing is communicated, where the electrolyte flows out to separate from the positive electrode and the negative electrode. Timely separation of the electrolyte in the single lithium ion battery is achieved when the temperature thereof rises abnormally, the electrolyte is effectively protected from being ignited or decomposed, the single lithium ion battery is protected from being ignited and exploded, and damages to the rest surrounding single lithium ion batteries caused by a chain reaction brought by the single lithium ion battery of which the temperature rises abnormally are avoided.

## Claims

### Claim 1

A lithium ion battery module, comprising:
a sealing box body filled with a flame retardant gas; and
a lithium ion battery provided in the sealing box body, which comprises a housing in which a positive electrode, a negative electrode, and an electrolyte are provided, wherein a distance exists between a bottom of the lithium ion battery and a bottom of the sealing box body,
wherein,
a part on an upper portion of the housing and a part on a lower portion of the housing are made from the fusible material;
when the temperature in the housing exceeds the set threshold, the part made from the fusible material on the upper portion of the housing is penetrated to form a connecting channel where a flame retardant gas is introduced, and the part made from the fusible material on the lower portion of the housing is penetrated to form a release channel where the electrolyte flows out to separate from the positive electrode and the negative electrode.

### Claim 2 (depends on 1)

The lithium ion battery module according to claim 1, wherein,
a part on a top of the housing and a part on a bottom of the housing are made from the fusible material;
when the temperature in the housing exceeds the set threshold, the part made from the fusible material on the top of the housing is penetrated to form a connecting channel where a flame retardant gas is introduced, and the part made from the fusible material on the bottom of the housing is penetrated to form a release channel where the electrolyte flows out to separate from the positive electrode and the negative electrode.

### Claim 3 (depends on 1)

The lithium ion battery module according to claim 1, wherein,
the housing is divided into a first section and a second section which are provided vertically, a connecting area between the first section and the second section is made from the fusible material;
when the temperature in the housing exceeds the set threshold, the connecting area made from the fusible material is penetrated, the second section is separated from the first section and falls into the sealing box body, and the electrolyte flows into the sealing box body to separate from the positive electrode and the negative electrode.

### Claim 4 (depends on 1)

The lithium ion battery module according to claim 1, wherein,
entire side walls or a part of side walls of the housing are made from the fusible material; and
when the temperature in the housing exceeds the set threshold, the entire side walls or the part of the side walls made from the fusible material on the housing automatically crack and falls into the sealing box body, and the electrolyte flows into the sealing box body to separate from the positive electrode and the negative electrode.

### Claim 5 (depends on 1)

The lithium ion battery module according to claim 1, wherein,
wherein the lithium ion battery module further comprises a gas circulation loop provided at an outer side of the sealing box body;
a first through hole and a second through hole are provided on the sealing box body, and
both ends of the gas circulation loop are respectively connected to the first through hole and the second through hole so as to circulate the flame retardant gas;
a sensor is provided in the part made from the fusible material on the housing:
when it is detected that the part made from the fusible material on the housing is penetrated, a starting signal is immediately sent to the gas circulation loop so as to start the gas circulation loop.

### Claim 6 (depends on 5)

The lithium ion battery module according to claim 5, wherein,
the sensor is a temperature sensor, a distance measuring sensor, or a speed measuring sensor.

### Claim 7 (depends on 5)

The lithium ion battery module according to claim 5, wherein,
the gas circulation loop comprises a first solenoid valve, a buffer tank, a heat exchanger, a second solenoid valve, and a compressor which are sequentially provided;
a valve port on the first solenoid valve distant from the buffer tank is connected to the first through hole; and a valve port on the compressor distant from the second solenoid valve is connected to the second through hole.

### Claim 8 (depends on 5)

The lithium ion battery module according to claim 5, wherein,
the first through hole is provided on an upper portion of the sealing box body, and the second through hole is provided on a lower portion of the sealing box body.

### Claim 9 (depends on 1)

The lithium ion battery module according to claim 1, wherein,
a part of an upper portion of the housing and a part of a lower portion of the housing are made from the fusible material;
a first through hole and a second through hole are provided on the sealing box body, and a gas circulation loop is provided on an outer portion of the sealing box body; both ends of the gas circulation loop are respectively connected to the first through hole and the second through hole;
an air supply member is further provided in the housing, is provided between the first through hole and the housing, and comprises an air outlet corresponding to the part made from the fusible material on the upper portion of the housing;
when the temperature in the housing exceeds the set threshold, the part made from the fusible material on the upper portion of the housing is penetrated to form a connecting channel, and the flame retardant gas enters an inner portion of the housing after passing through the air outlet and the connecting channel; and the part made from the fusible material on the lower portion of the housing is penetrated to form a release channel where the electrolyte flows into the sealing box body to separate from the positive electrode and the negative electrode.