Battery including gas discharging member and electrolyte injection member

Abstract

Disclosed herein is a battery including a cell having an electrode laminate and a liquid electrolyte mounted in an internal space of a battery case, a gas discharging member communicating with the internal space of the battery case for discharging gas generated in the cell out of the cell, and a liquid electrolyte injection member communicating with the internal space of the battery case for injecting a liquid electrolyte into internal space of the battery case.

Claims

1. A battery comprising: a battery case having a first internal space; a cell mounted in the internal space, the cell having an electrode laminate and a liquid electrolyte; a first pipe member communicating with the internal space of the battery case for discharging gas generated by the cell from the first internal space, where the first pipe member having a second internal space and having an inlet and an outlet, the inlet facing the first internal space and the outlet at the opposite end of the first pipe member from the inlet; a liquid material non-transmissive porous film, the porous film having a first side directly contacting the first internal space and a second side opposite the first side, wherein the second side directly contacts the second internal space of the first pipe member, wherein pores of the porous film extend between the first side and the second side; a suction member mounted at the outlet; and a liquid electrolyte injection member communicating with the first internal space of the battery case for injecting a liquid electrolyte into first internal space of the battery case.

2. The battery according to claim 1, wherein the porous film has a pore size of 0.1 nm to 1 nm.

3. The battery according to claim 1, wherein the suction member is a suction pump.

4. The battery according to claim 1, wherein the liquid electrolyte injection member comprises a second pipe member communicating with the first internal space of the battery case and a liquid electrolyte storage tank mounted at one end of the pipe member.

5. The battery according to claim 4, wherein the liquid electrolyte injection member further comprises a backward flow prevention member mounted at the other end of the second pipe member.

6. The battery according to claim 5, wherein the backward flow prevention member is a check valve.

7. The battery according to claim 6, wherein the check valve comprises: a center pin; a first membrane fixedly coupled to the pipe member, the first membrane being provided with a hollow portion, through which the center pin extends, and a through hole, through which the liquid electrolyte is injected; a second membrane coupled to one end of the center pin, the second membrane being coupled to or separated from the first membrane for opening and closing the second pipe member; and an elastic member for maintaining a coupling state between the first membrane and the second membrane.

8. The battery according to claim 7, wherein the elastic member is a compression spring.

9. The battery according to claim 1, wherein the cell is a pouch-shaped cell comprising a space portion having an electrode laminate and an electrolyte mounted therein and a sealed portion surrounding the space portion, the sealed portion being provided with through holes coupled to a second pipe member of the liquid electrolyte injection member and the first pipe member.

10. The battery according to claim 9, further comprising a backward flow prevention member mounted at one end of each of the through holes.

11. A battery module comprising a battery according to claim 1.

12. A battery pack comprising a battery module according to claim 11.

13. A device using a battery pack according to claim 12 as a power source.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

(2) FIG. 1 is a typical view showing a battery according to an embodiment of the present invention.

BEST MODE

(3) Now, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted, however, that the scope of the present invention is not limited by the illustrated embodiments.

(4) FIG. 1 is a typical view showing a battery according to an embodiment of the present invention.

(5) Referring to FIG. 1, a battery 10 includes a cell 100, a gas discharging member 200, and a liquid electrolyte injection member 300.

(6) The gas discharging member 200 includes a pipe member 210, a liquid material non-transmissive porous film 220, and a suction pump 230.

(7) Gas generated in the cell 100 is discharged out of the cell 100 via the pipe member 210 according to the operation of the suction pump 230 of the gas discharging member 200. The porous film 220 prevents a liquid electrolyte from being discharged out of the cell 100 via the pipe member 210 during the above-described process.

(8) The liquid electrolyte injection member 300 includes a pipe member 310, a check valve 320, and a liquid electrolyte storage tank 330.

(9) After the gas is discharged out of the battery 10, a liquid electrolyte stored in the liquid electrolyte storage tank 330 of the liquid electrolyte injection member 300 is injected into the cell 100 via the pipe member 310. The check valve 320 prevents the liquid electrolyte from flowing backward from the cell 100 to the liquid electrolyte storage tank 330.

(10) Although the exemplary embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

INDUSTRIAL APPLICABILITY

(11) As is apparent from the above description, a battery according to the present invention includes a gas discharging member and a liquid electrolyte injection member. Consequently, it is possible to further inject a liquid electrolyte into the battery and to easily discharge gas generated in the battery out of the battery.