Lithium-ion battery and electric vehicle utilizing the same

• US 10,319,970 B2
• Filed: 07/24/2015
• Issued: 06/11/2019
• Est. Priority Date: 07/30/2014
• Status: Active Grant

• Current Assignee: Zhejiang Chilwee Chuangyuan Industry Company, Ltd.
• Original Assignee: Zhejiang Chilwee Chuangyuan Industry Company, Ltd.
• Inventors: Sun, Yanxian, Ren, Ning, Li, Aiming, Yang, Xiaoxu, Zhang, Haifei
• Primary Examiner(s): Marks, Jacob B
• Application Number:
  US15/327,893
• Publication Number:
  US 20170214018A1
• Time in Patent Office: 1,418 Days
• CPC Class Codes: A62C 3/07 in vehicles, e.g. in road vehicles
• CPC Class Codes: A62C 3/16 in electrical installations, e.g. cableways
• CPC Class Codes: A62C 99/0027 Carbon dioxide extinguishers
• CPC Class Codes: A62D 1/06 containing gas-producing, chemically-reactive components
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60Y 2200/91 Electric vehicles
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• CPC Class Codes: H01M 2200/10 Temperature sensitive devices
• CPC Class Codes: H01M 2200/20 Pressure-sensitive devices
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/10 Primary casings; Jackets or wrappings
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/14 for protecting against damage caused by external factors
• CPC Class Codes: H01M 50/143 Fireproof; Explosion-proof
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H01M 50/30 Arrangements for facilitating escape of gases
• CPC Class Codes: H01M 50/333 Spring-loaded vent valves
• CPC Class Codes: H01M 50/383 Flame arresting or ignition-preventing means
• CPC Class Codes: H01M 50/394 Gas-pervious parts or elements
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries

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

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.

2. 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.

3. 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.

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

5. 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.

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

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

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

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

10. 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.

11. 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.