# US 10,319,970 B2 · Lithium-ion battery and electric vehicle utilizing the same

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- Number: US 10,319,970 B2
- Document ID: US10319970B2
- Status: Granted
- Kind: B2
- Application number: 15/327,893
- Filed: 2015-07-24
- Published: 2017-07-27
- Granted: 2019-06-11
- Earliest claimed: 2014-07-30
- Assignees: Zhejiang Chilwee Chuangyuan Industry Company Ltd.
- Applicants: Zhejiang Chilwee Chuangyuan Industry Company Ltd.
- Inventors: Yanxian Sun; Ning Ren; Aiming Li; Xiaoxu Yang; Haifei Zhang
- Web page: https://patentgrep.com/patent/US10319970B2

## CPC

- B60K 1/04: of the electric storage means for propulsion
- A62C 3/07: in vehicles, e.g. in road vehicles
- A62C 3/16: in electrical installations, e.g. cableways
- A62C 99/0027: {Carbon dioxide extinguishers}
- A62D 1/06: containing gas-producing, chemically-reactive components
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence)
- H01M 50/10: Primary casings; Jackets or wrappings
- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/14: for protecting against damage caused by external factors
- H01M 50/143: Fireproof; Explosion-proof
- H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658)
- H01M 50/30: Arrangements for facilitating escape of gases
- H01M 50/333: Spring-loaded vent valves
- H01M 50/383: Flame arresting or ignition-preventing means
- H01M 50/394: {Gas-pervious parts or elements}
- B60Y 2200/91: Electric vehicles
- H01M 2200/10: Temperature sensitive devices
- H01M 2200/20: Pressure-sensitive devices
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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)
- A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention relates to a lithium-ion battery and an electric vehicle utilizing the lithium-ion battery. The lithium-ion battery comprises a housing, and battery cell group disposed in the housing, wherein, a fire-extinguishing material layer is provided between the battery cell group and the housing, and the housing is provided with drain hole. The technical scheme of the present invention can effectively prevent fire and explosion of lithium-ion battery, and can significantly improve the safety of lithium-ion battery in use.

## Claims

### Claim 1

A lithium-ion battery comprising a housing, a battery cell group disposed in the housing, and a fire-extinguishing material layer between the battery cell group and the housing, the housing comprising a drain hole, the lithium-ion battery further comprising a battery sheath arranged in the housing, the battery cell group arranged in the battery cell sheath, the fire-extinguishing material layer arranged between the battery cell sheath and the housing, and the material of the battery cell sheath is ABS plastics or aluminum;
wherein a heat-insulating layer is arranged on the inner surface of the housing, and the material of the heat-insulating layer is silicon dioxide or asbestos.

### Claim 2 (depends on 1)

The lithium-ion battery according to claim 1, wherein the material of the fire-extinguishing material layer is a fire-extinguishing material that can undergo an endothermic reaction and generate carbon dioxide.

### Claim 3 (depends on 1)

The lithium-ion battery according to claim 1, wherein a shock absorption and flame-retardant material is filled between the battery cell group and the battery cell sheath.

### Claim 4 (depends on 1)

The lithium-ion battery according to claim 1, further comprising a pressure relief valve matched with the drain hole.

### Claim 5 (depends on 4)

The lithium-ion battery according to claim 4, wherein the pressure relief valve comprises a valve body and a valve cap with a through-hole, which are matched and connected with each other, a valve cavity that communicates with the drain hole is arranged in the valve body, a resilient component is arranged on the bottom surface of the valve cap, one end of the resilient component is connected with the valve cap, and the other end of the resilient component is connected with a valve block that matches with the valve cavity, and the valve block can enter into or exit the valve cavity under the resilient effect of the resilient component to form a sealed state and a vent state.

### Claim 6 (depends on 1)

The lithium-ion battery according to claim 1, wherein the drain hole is arranged in the top of the housing.

### Claim 7 (depends on 1)

The lithium-ion battery according to claim 1, wherein the material of the housing is aluminum.

### Claim 8 (depends on 1)

An electric vehicle in which the lithium-ion battery according to claim 1 is used as a battery.

### Claim 9 (depends on 2)

The lithium-ion battery according to claim 2, wherein the material of the fire-extinguishing material layer is a bicarbonate.

### Claim 10 (depends on 3)

The lithium-ion battery according to claim 3, wherein the material of the fire-extinguishing material layer is one or more of sodium bicarbonate, potassium bicarbonate, calcium bicarbonate, and ammonium bicarbonate.

### Claim 11 (depends on 3)

The lithium-ion battery according to claim 3, wherein the shock absorption and flame-retardant material is silica gel or flame-retardant AN-VDC copolymer fibers.