阅读说明：本技术 用于二次电池的气体测量设备 (Gas measuring apparatus for secondary battery ) 是由 金相完 李菅秀 柳德鉉 于 2018-09-13 设计创作，主要内容包括：一种用于二次电池的气体测量设备包括：腔室,在其中容纳二次电池；加热器单元,所述加热器单元将热量施加至腔室以使容纳在腔室中的二次电池起火；收集管,所述收集管连接至腔室的内部以收集二次电池中产生的气体；真空单元,所述真空单元连接至收集管以对腔室内部进行抽真空,从而将气体引入收集管；和气体测量单元,所述气体测量单元测量引入收集管的气体的量。(A gas measuring apparatus for a secondary battery includes a chamber in which the secondary battery is accommodated, a heater unit that applies heat to the chamber to ignite the secondary battery accommodated in the chamber, a collecting pipe connected to an inside of the chamber to collect gas generated in the secondary battery, a vacuum unit connected to the collecting pipe to evacuate the inside of the chamber to introduce the gas into the collecting pipe, and a gas measuring unit that measures an amount of the gas introduced into the collecting pipe.)

1, A gas measurement device for a secondary battery, the gas measurement device comprising:

a chamber accommodating a secondary battery therein;

a heater unit that applies heat to the chamber to ignite the secondary battery contained in the chamber;

a collecting pipe connected to an inside of the chamber to collect gas generated in the secondary battery;

a vacuum unit connected to the collection tube to evacuate the interior of the chamber, thereby introducing gas into the collection tube; and

a gas measurement unit that measures an amount of gas introduced into the collection pipe.

2. The gas measurement apparatus of claim 1, wherein the chamber comprises:

a main body including a receiving part having an side opened to receive the secondary battery, and

a cover covering the side of the main body to seal the receptacle.

3. The gas measurement apparatus according to claim 2, wherein the heater unit includes a heating coil having a cylindrical shape to surround an outer circumferential surface of the main body of the chamber, and transfers resistive heat of the heating coil to the main body of the chamber to ignite the secondary battery.

4. The gas measurement apparatus of claim 2, wherein the chamber further includes a sealing member disposed between the body and the cover to seal a gap between the body and the cover.

5. The gas measurement device according to claim 4, wherein the main body has an end portion in which a receiving groove that receives the seal member is formed.

6. The gas measurement apparatus of claim 5, wherein the chamber further includes a cooling device that cools the sealing member to prevent the sealing member from being thermally damaged,

wherein the cooling device comprises:

an inlet nozzle through which coolant is introduced into the receiving tank; and

an outlet nozzle through which coolant is discharged from the holding tank.

7. The gas measurement device according to claim 6, wherein the accommodation groove is open in the direction of the cover and has a shape into which a circular ring is insertable,

the sealing member includes an O-ring (Oring).

8. The gas measurement device according to claim 7, wherein an angle between the inlet nozzle and the outlet nozzle connected to the receiving tank with respect to a center of a circle drawn by the receiving tank is less than 45 °.

9. The gas measurement device according to claim 1, further comprising a holder that is made of a heat-resistant material and accommodates the heater unit and the chamber therein to isolate a risk factor generated when the secondary battery fires from the outside.

10. The gas measurement apparatus of claim 1, wherein the vacuum unit comprises:

a vacuum tube connected to the collection tube on the side of the vacuum tube;

a vacuum pump connected to the other side of the vacuum tube, and

a vacuum valve that opens and closes the vacuum tube.

11. The gas measurement device according to claim 1, wherein the gas measurement unit includes a gauge that measures a pressure of the gas introduced into the collection pipe to measure an amount of the gas generated.

12. The gas measurement device of claim 11, wherein the gas measurement unit further includes a temperature sensor that measures the temperature of gas introduced into the collection tube.

13. The gas measurement apparatus according to claim 12, wherein the collecting pipe includes a gas tank that provides a space that accommodates the gas,

the gauge measures a pressure of the gas contained in the gas tank, and the temperature sensor measures a temperature of the gas contained in the gas tank.

14. The gas measurement apparatus according to of any one of claims 1 and 11-13, wherein the gas measurement unit includes a gas analysis portion that analyzes a composition of a gas introduced into the collection pipe.

Technical Field

Of the related applicationCross-referencing

The present application claims priority from korean patent application No. 10-2017-0117886, filed on 9/14/2017, which is hereby incorporated by reference in its entirety.

Background

Unlike primary batteries, rechargeable batteries are rechargeable and are highly likely to be compact in size and high in capacity. Accordingly, recently, many studies on rechargeable batteries are underway. As the technical development and demand for mobile devices increases, the demand for rechargeable batteries as an energy source is rapidly increasing.

The rechargeable battery is classified into a coin type battery, a cylindrical type battery, a prismatic type battery, and a pouch type battery according to the shape of the battery case. In such a secondary battery, an electrode assembly mounted in a battery case is a chargeable and dischargeable power generation device having a structure in which electrodes and separators are stacked.

The electrode assembly may be broadly classified into a Jelly-roll type electrode assembly in which a separator is interposed between a positive electrode and a negative electrode, each of which are provided in the form of a sheet coated with an active material, and then, the positive electrode, the separator, and the negative electrode are wound, a stacking type electrode assembly in which a plurality of positive electrodes and negative electrodes are sequentially stacked with the separator interposed therebetween, and a stacking/folding type electrode assembly in which a stacking type unit cell is wound together with a separator having a long length.

The stability of the secondary battery is important, and it is necessary to analyze the amount of gas and harmful components generated when the secondary battery is ignited.

Disclosure of Invention

Technical problem

It is aspects of the present invention to provide gas measuring devices for secondary batteries, which are capable of easily collecting and analyzing the amount and harmful components of gas generated when a secondary battery fires.

Technical scheme

A gas measuring apparatus for a secondary battery may include a chamber in which the secondary battery is accommodated, a heater unit applying heat to the chamber to ignite the secondary battery accommodated in the chamber, a collecting pipe connected to an inside of the chamber to collect gas generated in the secondary battery, a vacuum unit connected to the collecting pipe to evacuate the inside of the chamber to introduce the gas into the collecting pipe, and a gas measuring unit measuring an amount of the gas introduced into the collecting pipe.

Advantageous effects

According to the present invention, the amount of gas and harmful components generated when the secondary battery fires can be analyzed by firing the secondary battery.

Further, according to the present invention, it is possible to simply and easily perform Sampling (Sampling) of gas generated when the secondary battery is ignited by heating the chamber using the heater unit to ignite the secondary battery, and the collecting pipe may be connected to the chamber to collect the gas generated when the secondary battery is ignited.

Further, according to the present invention, a cooling device may be provided to maintain the sealability of the chamber accommodating the secondary battery. That is, the sealing member disposed on the portion of the sealing chamber may be cooled via a cooling device to prevent the sealing member having an O-ring (Oring) shape from being thermally damaged. Therefore, the sealability of the chamber may be maintained when the secondary battery is ignited, the ignition gas within the secondary battery contained in the chamber may be easily collected, and the harmful gas may be prevented from being discharged to the outside, thereby improving stability.

Further, according to the present invention, the heater unit and the chamber may be accommodated in a holder made of a heat-resistant material and a high-strength material to isolate risk factors generated when the secondary battery is ignited from the outside, thereby improving stability.

Drawings

Fig. 1 is a front view of a gas measurement apparatus for a secondary battery according to an embodiment of the present invention.

Fig. 2 is a perspective view of a gas measurement apparatus for a secondary battery according to an embodiment of the present invention.

Fig. 3 is a sectional view taken along line a-a' in fig. 2.

Fig. 4 is an exploded perspective view of a chamber and a heater unit in a gas measuring apparatus for a secondary battery according to an embodiment of the present invention.

Fig. 5 is a sectional view taken along line B-B' in fig. 4.

Fig. 6 is a perspective view of a gas measuring apparatus for a secondary battery according to another embodiment of the present invention.

Fig. 7 is a perspective view of a holder in a gas measurement device for a secondary battery according to another embodiment of the invention.

Fig. 8 is an exploded perspective view of a holder, a chamber, and a heater unit in a gas measuring device for a secondary battery according to another embodiment of the present invention.

Detailed Description

The objects, specific advantages and novel features of the invention will become more apparent from the following detailed description of the invention when taken in conjunction with the drawings. It should be noted that in the present specification, components in the drawings are denoted by the same reference numerals as much as possible even if the components are shown in other drawings. Furthermore, the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the following description of the present invention, a detailed description of related art that may unnecessarily obscure the gist of the present invention will be omitted.

Fig. 1 is a front view of a gas measuring apparatus for a secondary battery according to an embodiment of the present invention, fig. 2 is a perspective view of the gas measuring apparatus for a secondary battery according to an embodiment of the present invention, and fig. 3 is a sectional view taken along line a-a' in fig. 2.

Referring to fig. 1 to 3, a gas measurement apparatus 100 for a secondary battery according to an embodiment of the present invention includes: a Chamber (Chamber)110 that accommodates the secondary battery 10; a heater unit 120 that applies heat to the secondary battery 10 to ignite the secondary battery 10; a collecting pipe 130 for collecting gas; a vacuum unit 140 for evacuating the chamber 110; a gas measuring unit 150 that measures the amount of gas.

Hereinafter, a gas measuring apparatus for a secondary battery according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 5.

Fig. 4 is an exploded perspective view of a chamber and a heater unit in a gas measuring apparatus for a secondary battery according to an embodiment of the present invention, and fig. 5 is a sectional view taken along line B-B' in fig. 4.

Referring to fig. 3 and 4, the chamber 110 includes an accommodating part 111a for accommodating the secondary battery 10.

For example, the secondary battery 10 may include a battery case 11 and an electrode assembly 12 accommodated in the battery case 11. Here, the electrode assembly 12 may be a chargeable and dischargeable power generation element, and has a structure in which electrodes 12c and separators 12d are combined and alternately stacked. The electrodes 12c may include a positive electrode 12a and a negative electrode 12 b. In addition, the electrode assembly 12 may have a structure in which the positive electrodes 12 a/the separators 12 d/the negative electrodes 12b are alternately stacked.

The chamber 110 may include a body 111 and a cover 112, the body 111 including a receiving part 111a having opening sides to receive the secondary battery 10, and the cover 112 covering a side of the body 111 to seal the receiving part 111a here, each of the body 111 and the cover 112 may be made of, for example, stainless steel, and particularly, each of the body 111 and the cover 112 may be made of, for example, a sus-316 material.

In addition, the chamber 110 may further include a sealing member 114 sealing a gap between the body 111 and the cover 112 and a cooling device 117 cooling the sealing member 114 to prevent the sealing member 114 from being thermally damaged.

The main body 111 includes an accommodating portion 111a having opening sides to accommodate the secondary battery 10.

Further, an accommodation groove 111d accommodating the sealing member 114 may be formed at an end of the body 111, here, the accommodation groove 111d may be formed in a circular shape in an end surface of the body 111 facing the side of the cover 112.

In addition, the main body 111 may include a receiving body receiving the secondary battery 10 and a coupling portion 111c providing a coupling portion to which the cover 112 is coupled by a coupling device 113.

The receiving body 111b may have an upwardly open cylindrical shape, here, the receiving body 111b may have a receiving space of an upwardly open cylindrical shape to receive, for example, the cylindrical secondary battery 10, furthermore, a collecting hole 111f through which the collecting pipe 130 passes is formed in the receiving body 111b such that the side of the collecting pipe 130 is inserted into the collecting hole 111 f.

The coupling part 111c may be disposed above the accommodating body 111b and have an accommodating groove 111d in a top surface thereof. Here, the receiving groove 111d may have a circular shape larger than the receiving space of the receiving body 111 b. Here, the accommodation groove 111d may be opened in the direction of the cover 112 and have a shape into which a circular ring is inserted.

In addition, the coupling portion 111c may be spaced apart from the receiving groove 111d by a predetermined distance on a plane to form a plurality of coupling holes 111e to which the coupling device 113 is coupled.

The cover 112 may cover the side of the body 111 to seal the receiving part 111a formed in the body 111 here, the cover 112 may cover the top surface of the coupling part 111c of the body 111 to seal the receiving space formed in the receiving body 111 b.

Further, the cover 112 may be fixed to the body 111 by a coupling device 113. Here, the cover 112 may have a through hole 112e, and the coupling device 113 is coupled to the through hole 112 e. Here, the coupling means 113 may be provided as, for example, a screw, and a threaded portion may be formed on an inner circumferential surface of the through hole 112e so that the screw passes through for coupling.

A sealing member 114 may be disposed between the body 111 and the cover 112 to seal a gap between the body 111 and the cover 112.

In addition, the sealing member 114 may be received in a receiving groove 111d formed in the body 111 of the chamber 110.

Further, the sealing member 114 may have a lower portion closely attached to the bottom surface of the receiving groove 111d and an upper portion closely attached to the bottom surface of the cover 112.

Further, the sealing member 114 may be made of a flexible heat-resistant material. Here, the height of the sealing member may be equal to or greater than the height of the accommodation groove 111 d. Further, the sealing member 114 may be made of, for example, synthetic resin, synthetic plastic, or synthetic rubber. Here, the sealing member 114 may be made of, for example, silicon gel (Silcon).

The sealing member 114 may be provided, for example, as an O-ring (Oring).

Referring to fig. 3 to 5, the cooling device 117 may cool the sealing member 114 so that the sealing member 114 is not thermally damaged.

Further, the cooling device 117 may include an inlet nozzle through which the coolant W is introduced into the receiving groove 111d of the body 111, and an outlet nozzle 116 through which the coolant W is discharged from the receiving groove 111 d. Here, the cooling device 117 may introduce the coolant W through the inlet nozzle 115, and the coolant W introduced into the accommodation groove 111d may move along the accommodation groove 111d to cool the sealing member disposed in the accommodation groove 111d and then be discharged from the accommodation groove 111d through the outlet nozzle 116.

Further, the angle α between the inlet nozzle 115 and the outlet nozzle 116 connected to the accommodation groove 111d with respect to the center of the circle drawn by the accommodation groove 111d may be less than, for example, 45 °.

Therefore, when the coolant introduced through the inlet nozzle 115 moves along the receiving groove 111d to cool the sealing member 114 and then is discharged through the outlet nozzle 116, the coolant may contact the sealing member 114 having a large area to effectively cool the sealing member 114.

A Heater (Heater) unit may apply heat to the chamber 110 to ignite the secondary battery 10 received in the chamber 110.

In addition, the heater unit 120 may have a cylindrical shape to surround the outer circumferential surface of the body 111 of the chamber 110.

In addition, the heater unit 120 may include a heating coil to transfer resistance heat of the heating coil to the main body 111 of the chamber 110, thereby igniting the secondary battery 10.

Here, the heater unit 120 may apply heat having a temperature of, for example, about 600 degrees or more to the secondary battery 10 to ignite the secondary battery 10.

Referring to fig. 2 and 3, a collecting pipe 130 may be connected to the inside of the chamber 110 to collect gas generated in the secondary battery 10.

Further, the collection tube 130 may further include a Gas Tank (Gas Tank)132 that provides a space for containing the collected Gas.

Further, the collection pipe 130 may have, for example, an side connected to the chamber 110 and another side connected to the gas tank 132.

Further, the collection pipe 130 may further include a collection valve 131 disposed between the chamber 110 and the gas tank 132 to open and close the collection pipe 130.

A vacuum unit 140 may be connected to the collecting duct 130 to vacuumize the inside of the chamber 110 such that gas generated when the secondary battery 10 is ignited is introduced into the collecting duct 130.

Further, the vacuum unit 140 may include a vacuum tube 142, an side of the vacuum tube 142 being connected to the collection tube 130, a vacuum pump 141 connected to the other side of the vacuum tube 142, and a vacuum valve 143 opening and closing the vacuum tube 142, here, the vacuum tube 142 may be connected between the chamber 110 and the gas tank 132 of the collection tube 130, and specifically, the vacuum tube 142 may be connected to a portion of the collection tube 130 disposed between the collection valve 131 and the gas tank 132 of the collection tube 130.

Further, the Vacuum pump may be, for example, a Rotary Vacuum pump (Rotary Vacuum pump), and may apply a Vacuum of about 200 liters per minute (liter/min).

Gas measurement unit 150 may measure the amount of gas introduced into header 130.

In addition, the gas measurement unit 150 may include a pressure gauge 151 that measures the amount of gas generated and a temperature sensor 152 that measures the temperature of the gas.

A pressure Gauge (Gauge)151 may measure the pressure of the gas introduced into the collection pipe 130, and thus, the amount of gas generated in the secondary battery 10 may be measured by the measured gas pressure, here, a metering valve 151a may be further provided between the collection pipe 130 and the pressure Gauge 151 to limit opening and closing between the collection pipe 130 and the pressure Gauge 151.

Temperature sensor 152 may measure the temperature of the gas introduced into header 130. Here, the temperature sensor 152 may be, for example, a PT sensor (PT sensor).

The pressure gauge 151 may measure the pressure of the gas contained in the gas tank 132, and the temperature sensor 152 may measure the temperature of the gas contained in the gas tank 132.

Fig. 6 is a perspective view of a gas measuring apparatus for a secondary battery according to another embodiment of the present invention.

Referring to fig. 6, a gas measuring apparatus 200 for a secondary battery according to another embodiment of the present invention includes a chamber 110 accommodating a secondary battery 10, a heater unit 120 applying heat to the secondary battery 10 to ignite the secondary battery 10, a collecting pipe 130 collecting gas, a vacuum unit 140 vacuuming the chamber 110, and a gas measuring unit 250 measuring the amount of gas (see fig. 3).

The gas measuring apparatus 200 for a secondary battery according to another embodiment of the present invention is different from the gas measuring apparatus 100 for a secondary battery according to the previous embodiment of the present invention in that the gas measuring apparatus 200 further includes a holder 260 accommodating the heater unit 120 and the chamber 110 and a gas analyzing part 253 analyzing gas components, and therefore, the contents of repetition of this embodiment with those according to the previous embodiment will be briefly described, and in addition, the differences therebetween will be mainly described.

Fig. 7 is a perspective view of a holder in a gas measuring apparatus for a secondary battery according to another embodiment of the present invention, and fig. 8 is an exploded perspective view of the holder, a chamber, and a heater unit in a gas measuring apparatus for a secondary battery according to another embodiment of the present invention.

In detail, referring to fig. 6 to 8, in the gas measuring device 200 for a secondary battery according to another embodiment of the present invention, the holder 260 may accommodate therein the heater unit 120 and the chamber 110 to isolate risk factors generated when the secondary battery fires from the outside.

Further, the holder 260 may include an th holder 261 and a second holder 262.

Further, the holder 260 may include a heat-resistant material and a high-strength material.

In the gas measuring apparatus 200 for a secondary battery according to another embodiment of the present invention, the gas measuring unit 250 may include a pressure gauge 251 that measures the amount of gas generated, a gas analyzing part 253 that analyzes the composition of the gas, and a temperature sensor 252 that measures the temperature of the gas.

The pressure gauge 251 may measure the pressure of the gas introduced into the header pipe 130 to extract the amount of gas generated in the secondary battery, here, a metering valve 251a may be further provided between the header pipe 130 and the pressure gauge 251 to limit opening and closing between the header pipe 130 and the pressure gauge 251.

Temperature sensor 252 may measure the temperature of the gas introduced into header 130. Here, the temperature sensor 252 may be, for example, a PT sensor.

The pressure gauge 251 may measure the pressure of the gas contained in the gas tank 132 of the collecting pipe 130, and the temperature sensor 252 may measure the temperature of the gas contained in the gas tank 132.

The gas analysis part 253 may analyze the composition of the gas introduced into the collecting pipe 130 to analyze whether the gas contains a harmful component to analyze the harmful component. Here, the gas analyzer 253 may include, for example, a gas chromatograph (Gaschromatography).

Further, the gas analysis portion 253 may be connected to the gas tank 132 of the collection pipe 130 to analyze the composition of the gas contained in the gas tank 132. Here, a throttle valve 253a may be provided between the gas analysis portion 253 and the gas tank 132 to restrict opening and closing between the gas tank 132 and the gas analysis portion 253.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood that the scope of the invention is not limited to the gas measurement device for a secondary battery according to the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

Furthermore, the scope of the invention is to be construed in accordance with the substance defined by the following claims.