KR102312072B1 - Safety testing chamber for battery - Google Patents

Abstract

The present invention relates to a battery safety testing chamber, which allows a battery to be tested in a certain temperature range. To this end, the battery safety testing chamber includes: a housing; a test room provided inside the housing to embed the battery; an air circulation path formed around the test room so that air in the test room can circulate; a blowing fan disposed in the air circulation path to circulate the internal air of the test room; a temperature control means disposed in the air circulation path to heat or cool air blown by the blowing fan; and a nitrogen supply means for increasing the amount of nitrogen in the test room by supplying nitrogen to the air circulation path in order to prevent a fire in the battery together with prevention of condensation of the temperature control means.

Description

Battery safety testing chamber

The present invention relates to a battery safety testing chamber, and for this purpose, the battery is tested by operating the internal operating temperature of the test room in the range of 60°C to -30°C without a separate heating device, but temperature control means by increasing the amount of nitrogen in the test room It relates to a battery safety testing chamber that improves the responsiveness of temperature changes by preventing the occurrence of frost in the air and prevents safety accidents caused by battery explosion.

In general, in the case of a product that generates heat during operation, such as a battery or a semiconductor component, after the manufacturing process is completed, the safety test and the quality of the product are tested in various environments.

For example, after disposing the test object in a predetermined space, the operation may be tested under harsh conditions according to temperature change or temperature maintenance, and whether the test object has explosiveness by operating at high temperature for a long time may be tested.

As a device used here, a test chamber for arranging a test object is provided. The test chamber has a test room therein, and a heating device or a cooling device for forming a temperature condition required for the test room is provided.

However, the conventional test chamber used an evaporator and a heating coil to generate hot and cold air in the test room, and accordingly, a lot of energy was consumed and the temperature operation range was very small due to the interference of the residual temperature of the evaporator. .

In addition, when the test room is operated at 18° C. or less, frost is generated on the surface of the evaporator, and there is a problem in that it is difficult to keep the temperature of the air constant due to the interference of the frost in generating cold air.

In addition, the conventional test chamber has a problem in that the structure of the device for preventing the fire by preventing the explosion of the battery is not provided.

Republic of Korea Patent Publication No. 10-2013-0000551 Republic of Korea Patent Registration No. 10-2098564

The present invention has been devised in view of the above problems, and a first object of the present invention is to connect a proportional control valve installed in front of the expansion valve connected to the first evaporator without a separate heat generating device, and connected to the leading edge of the second evaporator. The purpose of this is to provide a battery safety testing chamber that precisely controls the opening degree of the proportional control valve to precisely control the temperature within the maximum range of 60°C to -30°C at 0.1°C intervals.

A second object of the present invention is to increase the amount of nitrogen in the test room to prevent frost from occurring in the temperature control means to improve the responsiveness of temperature changes, and to prevent safety accidents due to battery explosion. To provide a safety testing chamber.

According to the characteristics for achieving the above object, the first invention relates to a battery testing chamber capable of testing a battery in a certain temperature range, and for this purpose, a housing; and a battery provided inside the housing Built-in test room; And an air circulation path formed around the test room so that the air in the test room circulates; a temperature control means disposed in the air circulation path to heat or cool the air blown by the blower fan; and nitrogen supply means for increasing the amount of nitrogen in the test room by supplying nitrogen to the air circulation path to prevent condensation of the temperature control means and to prevent a fire in the battery.

In the second invention, in the first invention, the temperature control means consists of a first evaporator and a second evaporator overlapping the first evaporator so as to be able to exchange heat with each other, wherein the second evaporator is a high-temperature and high-pressure device discharged from the compressor. The gas is supplied and heat-exchanged with the first evaporator, and the room-temperature high-pressure gas discharged through heat exchange from the second evaporator is condensed into a low-temperature and high-pressure liquid through a heat exchange module, and then recirculated to the first evaporator to increase the cooling efficiency of the first evaporator. It is characterized in that it is configured to be able to.

In the third invention, in the second invention, the temperature regulating means precisely adjusts the opening degree of the proportional control valve installed in front of the expansion valve connected to the first evaporator and the proportional control valve connected to the leading edge of the second evaporator. It is characterized in that the temperature is precisely controlled and operated at intervals of 0.1°C within the maximum range of 60°C to -30°C.

In the fourth invention, in the second invention, in the heat exchange module, the medium-temperature and high-pressure liquid supplied from the condenser is supplied as a low-temperature and low-pressure liquid through an expansion valve, and after heat exchange with the room-temperature and high-pressure gas discharged from the second evaporator, the state is changed to a low-temperature atmospheric gas. It is characterized in that it is configured to reduce overload of the compressor by re-supplying it to the compressor.

In the fifth invention, in the first invention, the nitrogen supply means includes a compressor that sucks in air in the atmosphere and compresses it, and the compressed air is supplied from the compressor to separate nitrogen using a hollow fiber membrane. , and a nitrogen generator for supplying the separated nitrogen to the air circulation path, and a nitrogen sensor for measuring the nitrogen concentration is further provided on the inside/outside of the housing.

In the sixth invention, in the first invention, the operation of the nitrogen generator and the compressor is controlled by the control unit based on the nitrogen sensing amount of the indoor/outdoor nitrogen sensor, and the air in the air circulation path is nitrogen in proportion to the amount of nitrogen supplied. It is characterized in that it is configured to be fed back to the generator.

The seventh invention, in the second invention, is characterized in that the second evaporator is configured to receive the high-temperature and high-pressure gas supplied from the compressor by boosting the pressure through the pressure regulator so as to increase the heat generation performance.

According to the battery safety testing chamber of the present invention, the proportional control valve installed in front of the expansion valve connected to the first evaporator without a separate heating device and the opening degree of the proportional control valve connected to the leading edge of the second evaporator are precisely adjusted to the maximum Within the range of 60°C to -30°C, it has the effect of precisely controlling the temperature at 0.1°C intervals.

In addition, increasing the amount of nitrogen in the test room prevents frost from occurring in the temperature control means to improve the responsiveness to temperature changes, while lowering the oxygen concentration to prevent safety accidents due to battery explosion.

In addition, there is an effect of reducing the overload of the condenser and the compressor through the heat exchange module, enabling more effective temperature operation control.

1 is a perspective view of a battery safety testing chamber according to the present invention;
Figure 2 is a block diagram showing the cross-sectional configuration of Figure 1 and the operation of the nitrogen generating means;
3 is an exploded view of the refrigeration cycle of the battery safety testing chamber according to the present invention;
4 is a refrigerant cycle flow diagram of the battery safety testing chamber of the present invention;
5 is a refrigerant cycle flow chart showing the operation of the second evaporator;
6 is a flowchart of a refrigerant cycle showing a heat exchange module.

The following objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and that the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

The embodiments described and illustrated herein also include complementary embodiments thereof.

As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the terms 'comprise' and/or 'comprising' do not exclude the presence or addition of one or more other components.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific contents have been prepared to more specifically explain and help the understanding of the invention. However, a reader having enough knowledge in this field to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known and not largely related to the invention in describing the invention are not described in order to avoid confusion in describing the invention.

Hereinafter, the battery safety testing chamber according to the present invention will be described in detail together with the accompanying drawings.

Figure 1 is a perspective view of a battery safety testing chamber according to the present invention, Figure 2 is a block diagram showing the cross-sectional configuration of Figure 1 and the operation of the nitrogen generating means, Figure 3 is a refrigeration cycle of the battery safety testing chamber according to the present invention is the development of

As shown in Figures 1 to 3, the present invention is to test the battery by operating the internal temperature of the test room in the range of 60 ℃ to -30 ℃, by increasing the amount of nitrogen in the test room, frost is generated in the temperature control means It relates to a battery safety testing chamber 100 that improves the responsiveness of a temperature change by preventing it from happening, while preventing a safety accident due to the explosion of the battery.

The battery safety testing chamber 100 of the present invention largely consists of five parts, which include a housing 10, a test room 20, an air circulation path 30, a temperature control means 31, and a nitrogen supply means. It consists of (40).

The test room 20 is provided inside the housing 10 and functions to test the battery in a certain temperature range, and has a structure that is isolated and sealed from the outside through the door 11 provided in the housing 10. .

The test room 20 functions to test the battery in a set temperature range.

To this end, in the test room 20, a plurality of through holes 12 are further formed in the upper and lower portions so that hot or cold air can be circulated.

And the periphery of the test room 20 has a structure in which an air circulation path 30 is further formed in communication with the through hole 12 .

In the air circulation path 30, a blowing fan 32 for circulating air in the test room 20, and a temperature control means 31 for heating or cooling the air circulated by the blowing fan 32 are arranged and configured. .

Here, the temperature control means 31 is configured such that the first evaporator 311 and the second evaporator 312 are overlapped with each other, and the temperature of the two evaporators 311 and 312 is controlled without a separate heat generating device (not shown). It functions to precisely control the temperature in the test room 20 by

The refrigerant cycle including the above-described temperature control means 31 will be separately described in detail below.

In addition, the nitrogen supply means 40, as shown in (a) and (b) of Figure 2, the temperature control means 31 to prevent moisture from condensing on the surface to prevent frost from occurring, while the fire of the battery during battery testing It functions to supply nitrogen to prevent

The nitrogen supply means 40 includes a compressor 41 that sucks air in the atmosphere and compresses it, and receives compressed air from the compressor 41 and separates nitrogen using a hollow fiber membrane. , and a nitrogen generator 42 for supplying the separated nitrogen to the air circulation path 30 .

Here, the nitrogen generator 42 has a built-in hollow fiber membrane to receive compressed air and discharge nitrogen from which oxygen and moisture have been removed to the outlet, thereby increasing the nitrogen content of the test room 20 and the air circulation path 30 .

At this time, a nitrogen sensor (S) for measuring the nitrogen concentration is further provided in the test room (20), and the nitrogen sensor (S) is also provided outside the housing (10) to measure the amount of nitrogen inside/outside for safety accidents is designed to prevent

In addition, the nitrogen generator 42 may be set to stop operation when the nitrogen content of the test room 20 and the air circulation path 30 is 90% or more.

On the other hand, the operation of the nitrogen generator 42 and the compressor 41 is controlled by the control unit 70 based on the amount of nitrogen sensed by the indoor/outdoor nitrogen sensor S.

In addition, in proportion to the amount of nitrogen supplied through the nitrogen generator 42, the air in the test room 20 and the air circulation path 30 is re-supplied to the nitrogen generator 42, so that the amount of nitrogen can be increased in a short time. is provided

Through the above-described structure, the amount of nitrogen in the test room 20 can be increased to prevent a fire in the battery, and the higher the nitrogen concentration, the inversely proportional to the moisture content, so the temperature control means disposed in the air circulation path 30 (31) is provided with a structure that can prevent the occurrence of frost in advance.

In addition, the nitrogen generating means 40 may be configured to further include an oxygen tank 43 for temporarily storing oxygen separated from the nitrogen generator 42 .

In addition to the process of increasing the nitrogen content in the test room, the oxygen tank 43 receives nitrogen exhausted from the test room 20 after the battery test is completed, mixes it with oxygen, and then exhausts it to the outside to prevent safety accidents. It can be configured to prevent this.

Accordingly, the battery safety testing chamber 100 of the present invention increases the amount of nitrogen in the test room 20 through the nitrogen generating means 40 to prevent frost from occurring in the evaporators 311 and 312, and also to prevent a fire in the battery. Not only that, the nitrogen generated by the nitrogen generator 42 is mixed with oxygen in the oxygen tank 43 and exhausted to the outside, thereby providing a structure capable of preventing a user's safety accident.

On the other hand, the battery safety testing chamber 100 of the present invention, as shown in Fig. 3, the compressor 61 -> the condenser 64 -> the expansion valve (E) -> the second in the normal refrigerant cycle consisting of the first evaporator (311) It further includes an evaporator 312 and a heat exchange module 50 .

Here, the temperature control means 31 includes a first evaporator 311 and a second evaporator 312 overlapping the first evaporator 311 to exchange heat with each other.

Here, the second evaporator 312 receives the high-temperature and high-pressure gas discharged from the compressor 61 and exchanges heat with the first evaporator 311 .

At this time, the temperature control means 31 is connected to a proportional control valve (SV) installed in front of the expansion valve (E) connected to the first evaporator (311) without a separate heating device, and connected to the leading edge of the second evaporator (312). By precisely adjusting the opening degree of the proportional control valve (SV), it is possible to precisely control the temperature within the range of 60°C to -30°C at 0.1°C intervals.

And the heat exchange module 50 condenses the room-temperature high-pressure gas discharged through heat exchange from the second evaporator 312 into a low-temperature high-pressure liquid and then recirculates it to the first evaporator 311, thereby cooling efficiency of the first evaporator 311. In addition, it serves as an additional function to reduce the overload of the condenser (64).

In addition, in the heat exchange module 50, the medium-temperature and high-pressure liquid supplied from the condenser 64 is supplied as a low-temperature and low-pressure liquid through the liquid separator 66 and the expansion valve E, and is discharged from the second evaporator 312 at room temperature and high pressure. After heat exchange with the gas, the state is changed to the low-temperature atmospheric gas and re-supplied to the compressor 61 , thereby serving as an additional function to reduce the overload of the compressor 61 .

Hereinafter, the refrigerant cycle of the battery safety testing chamber of the present invention according to the present invention will be described in detail together with the accompanying drawings.

4 is a flowchart of the refrigerant cycle of the battery safety testing chamber of the present invention, FIG. 5 is a flowchart of the refrigerant cycle showing the operation of the second evaporator, and FIG. 6 is a flowchart of the refrigerant cycle showing the heat exchange module.

4, the refrigerant cycle of the present invention is as follows.

First, the low-temperature and low-pressure gas discharged from the first evaporator 311 is separated from the liquid through the liquid separator 65 , and only the low-temperature and low-pressure gas is supplied to the compressor 61 .

Then, the compressor 61 converts the low-temperature and low-pressure gas into the high-temperature and high-pressure gas, separates the oil through the oil separator 62 , and then supplies only the pure high-temperature and high-pressure gas to the condenser 64 .

The condenser 64 converts high-temperature and high-pressure gas into medium-temperature and high-pressure liquid and supplies it to the expansion valve (E).

At this time, by adjusting the opening degree of the proportional control valve (SV) provided in front of the expansion valve (E) to control the amount of low-temperature low-pressure liquid supplied to the first evaporator (311) through the expansion valve (E), as a result, the first evaporator The temperature of (311) can be adjusted.

Here, if the amount of low-temperature and low-pressure liquid increases, the temperature of the temperature control means can be lowered to the range of -30°C.

The operation of the second evaporator is shown in FIG. 5 .

A portion of the high-temperature and high-pressure gas from which the oil is separated in the oil separator 62 is supplied to the second evaporator 312 through the proportional control valve SV to exchange heat with the low-temperature and low-pressure liquid in the first evaporator 311 .

At this time, the temperature of the second evaporator 312 may be varied by varying the supply amount of the high-temperature and high-pressure gas through the proportional control valve SV.

Meanwhile, a pressure regulator 63 is further provided between the oil separator 62 and the condenser 64, so that the high-temperature and high-pressure gas supplied from the compressor 61 can be pressurized and supplied through the pressure regulator 63. It can be configured to increase the heating performance.

Here, if the supply amount of the high-temperature and high-pressure gas is ↑, the temperature of the second evaporator 312 can be increased, so that the temperature of the temperature control means 31 can be increased to 60°C.

Therefore, the temperature control means 31 is a proportional control valve (SV) installed in front of the expansion valve (E) connected to the first evaporator (311) without a separate heating device, and the proportional control valve (SV) is connected to the leading edge of the second evaporator (312). By precisely adjusting the opening degree of the control valve (SV), a structure is provided that can precisely control the temperature at intervals of 0.1°C within the maximum range of 60°C to -30°C.

The operation of the heat exchange module is shown in FIG. 6 .

After the heat exchange, the room temperature high-pressure gas discharged from the second evaporator 312 flows into the heat exchange module 50 (shown in FIG. 5).

The medium-temperature and high-pressure liquid supplied from the condenser 64 is introduced into a low-temperature and low-pressure liquid state through the expansion valve E.

In this way, the room temperature high pressure gas (second evaporator) and the low temperature low pressure liquid (condenser) flowing in from two directions exchange heat with each other. It is condensed and recirculated to the first evaporator 311, thereby reducing the overload of the condenser 64 (shown in FIG. 5).

In addition, the overload of the compressor 61 can be reduced by re-supplying the low-temperature and low-pressure liquid to the compressor 61 as a low-temperature and high-pressure gas (change of state) after heat exchange with the high-temperature and high-pressure gas discharged from the second evaporator 312 .

Meanwhile, the above-described compressor 61 , the condenser 64 , and the heat exchange module 50 are disposed in a space provided under the housing 10 .

As described above, although the present invention has been described as a device capable of testing only a battery, it goes without saying that it can also be used in testing of electronic components such as semiconductors.

The embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

10: housing 11: door 12: through hole
20: Test Room
30: air circulation path 31: temperature control means 311: first evaporator
312: second evaporator 32: blowing fan
40: nitrogen supply means 41: compressor 42: nitrogen generator
43: oxygen tank
50: heat exchange module
61: compressor 62: oil separator 63: pressure regulator
64: condenser 65: liquid separator 66: liquid separator
70: control unit
SV: Proportional control valve E: Expansion valve S: Nitrogen sensor
100: battery safety testing chamber

Claims (7)

In the battery testing chamber for testing the battery in a certain temperature range,
housing 10;
a test room 20 provided inside the housing 10 to embed a battery;
an air circulation path 30 formed around the test room 20 so that air in the test room 20 can circulate;
a blowing fan 32 disposed in the air circulation path 30 to circulate the internal air of the test room 20;
a temperature control means (31) disposed in the air circulation path (30) to heat or cool the air blown by the blower fan (32);
Including a; done,
The temperature control means 31 is made of a first evaporator 311 and a second evaporator 312 overlapping the first evaporator 311 so as to exchange heat with each other,
The second evaporator 312 receives the high-temperature and high-pressure gas discharged from the compressor 61 and exchanges heat with the first evaporator 311, and the room-temperature high-pressure gas discharged through heat exchange from the second evaporator 312 is a heat exchange module ( 50) and then condensed into a low-temperature and high-pressure liquid and recirculated to the first evaporator 311 to increase the cooling efficiency of the first evaporator 311,
The temperature control means 31 is installed in front of the expansion valve E connected to the first evaporator 311 and is a proportional control for controlling the amount of low-temperature and low-pressure liquid supplied to the first evaporator 311 through the expansion valve E The valve SV and the second evaporator 312 are connected to the leading edge of the second evaporator 312 to control the amount of high-temperature and high-pressure gas supplied to the second evaporator 312 by precisely adjusting the opening degree of the proportional control valve SV, up to 60 Battery safety testing chamber, characterized in that the temperature is precisely controlled in 0.1℃ intervals within the range of ℃ ~ -30℃.
delete delete According to claim 1,
In the heat exchange module 50, the medium-temperature and high-pressure liquid supplied from the condenser 64 is supplied as a low-temperature and low-pressure liquid through the expansion valve E, and after heat exchange with the room-temperature and high-pressure gas discharged from the second evaporator 312, it is converted into a low-temperature atmospheric gas. Battery safety testing chamber, characterized in that configured to reduce overload of the compressor (61) by changing and re-supplying the compressor (61).
According to claim 1,
The nitrogen supply means 40 is a compressor 41 that sucks air in the atmosphere and compresses it, and after receiving compressed air from the compressor 41 and separating nitrogen using a hollow fiber membrane, It consists of a nitrogen generator 42 for supplying the separated nitrogen to the air circulation path 30,
Battery safety testing chamber, characterized in that a nitrogen sensor (S) for measuring the nitrogen concentration is further provided on the inside/outside of the housing.
6. The method of claim 5,
The operation of the nitrogen generator 42 and the compressor 41 is controlled by the control unit 70 based on the nitrogen detection amount of the indoor/outdoor nitrogen sensor S,
Battery safety testing chamber, characterized in that the air in the air circulation path (30) is configured to be re-supplied to the nitrogen generator (42) in proportion to the amount of nitrogen supplied.
According to claim 1,
Battery safety testing, characterized in that the second evaporator 312 is configured to receive the high-temperature and high-pressure gas supplied from the compressor 61 by boosting the pressure through the pressure regulator 63 to increase heat generation performance. chamber.

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