KR102304158B1 - Battery cooling system using air conditioner refrigerant - Google Patents

Abstract

The present invention relates to a battery cooling system using an air conditioner refrigerant. This includes a battery module including a plurality of battery cells and connected to an external power load; It is mounted on the battery module and has a refrigerant inducing part that passes the refrigerant supplied from the external air conditioner into the inside and allows the refrigerant to cool the battery module.
The battery cooling system using the air conditioner refrigerant of the present invention as described above diverts the refrigerant of the air conditioner installed in the vehicle to the outside of the air conditioner so that it is in direct contact with the cells inside the battery, so that the cooling effect is excellent, and it can be used for a long time. Allows the battery to maintain an optimal temperature range. In addition, since the cooling efficiency by the refrigerant is superior, the problem caused by vibration and noise can be solved at the same time by minimizing the use of the cooling fan installed together or by stopping the operation altogether.

Description

Battery cooling system using air conditioner refrigerant

The present invention relates to the cooling of a battery applied to an electric vehicle, a hybrid vehicle, or a hydrogen fuel vehicle, and more particularly, to a battery cooling system using an air conditioner refrigerant installed in the vehicle to cool the battery by using the refrigerant of the air conditioner installed in the vehicle as a cooling heat source. it's about

Lithium secondary batteries have advantages of high energy density and high operating voltage, and can be used for a long time because the capacity is stably maintained without a memory phenomenon. Accordingly, lithium secondary batteries are used as power sources for recent electric vehicles or hybrid vehicles as well as various mobile devices.

Lithium secondary batteries applied to electric and hybrid vehicles (hereinafter referred to as "vehicles") must be able to exhibit large output in a short time, as well as be usable for at least 10 years under harsh conditions where charging and discharging by large currents are repeated. , so excellent output stability and durability are required.

These lithium secondary batteries may be classified into lithium ion batteries and lithium polymer batteries according to the type of electrolyte, and may also be classified into cylindrical, prismatic, and pouch types according to structural characteristics.

The basic structure of a lithium secondary battery is an electrode assembly consisting of a positive electrode plate coated with a positive electrode active material, a negative electrode plate coated with a negative electrode active material, and a separator positioned between the positive and negative plates to prevent short circuit and allow lithium ions to pass through, and to accommodate the electrode assembly It consists of a case and an electrolyte injected into the case.

However, since the lithium secondary battery is sealed inside the case in a state in which the electrode assembly is stacked, if heat dissipation is not performed properly, deterioration of the battery may be caused, thereby reducing the lifespan and greatly impairing safety.

In particular, in a battery that requires high-speed charging and discharging, such as a battery for an electric vehicle or a hybrid vehicle, a lot of heat is generated in the process of instantaneously providing a high output, so the need for effective heat dissipation is greater. If effective heat is not achieved, deterioration due to the heat axis starts, and in severe cases, it may ignite or explode.

As described above, since the problem of heat generation in the battery is an important factor determining the lifespan and output, the technology for discharging the heat generated when the lithium ion battery is used is very important.

On the other hand, most of the cooling methods in the conventional battery use a cooling fan. That is, a cooling fan is installed on one side of the battery pack and cool air supplied from the outside is blown to the battery pack to achieve cooling.

However, this blow cooling method has a disadvantage that the cooling efficiency is not very good. The reason is that the temperature of the cold air does not reach the inside of the battery cell, but almost exclusively acts on the case. Even if the cold air reaches the core part of the battery cell, the amount of heat is not much and it takes a lot of time to be transferred to the core part. This means that the cooling time becomes that much longer.

In addition to this, the blower cooling device has a problem that noise and vibration are generated from the cooling fan. The noise generated when the cooling fan rotates gradually increases as the usage time increases, and it can spread to the surroundings along with the vibration and be transmitted to the driver.

Domestic Patent Publication No. 10-1191425 (battery device with cooling fan)

The present invention was created to solve the above problems, and provides a battery cooling system using an air conditioner refrigerant that has an excellent cooling effect, enables the battery to stably maintain the optimum temperature range even after long-term use, and has no problems due to vibration and noise. has a purpose

A battery cooling system using an air conditioner refrigerant of the present invention as a means of solving the problem for achieving the above object includes: a battery module including a plurality of battery cells and supplying power to a power load; It is mounted on the battery module and passes a refrigerant supplied from an external air conditioner into the inside, and a refrigerant inducing unit for allowing the refrigerant to cool the battery module.

In addition, the refrigerant inducing unit includes a cooling chamber connected to the air conditioner through a refrigerant supply pipe and a refrigerant return pipe, passing the refrigerant introduced through the refrigerant supply pipe, and accommodating the battery cell.

In addition, the battery cell; It consists of a body part, an anode electrode part and a cathode electrode part located at the ends of the body part, the cooling chamber; The positive electrode part and the negative electrode part of the battery cell may be accommodated, and the positive electrode part and the negative electrode part may be intensively cooled.

In addition, the cooling chamber; A first cooling chamber having a width that can cover the upper part of the battery module and having a mounting hole on the bottom surface of which the anode electrode part or the cathode electrode part of the battery cell is inserted, and the lower part of the battery module can be covered and a second cooling chamber having a width and having a mounting hole on the upper surface of which the negative electrode part or the positive electrode part of the battery cell is fitted.

In addition, in the first and second cooling chambers, the respective mounting holes are blocked to seal the refrigerant passage in the cooling chamber. A blocking film is installed to surround the anode electrode part and the cathode electrode part and to allow heat exchange in the thickness direction thereof.

In addition, a cell housing for accommodating the battery cells and guiding the refrigerant in the first cooling chamber to the second cooling chamber is further provided between the first cooling chamber and the second cooling chamber.

In addition, the cross-sectional shape of the cell housing takes the form of a polygon or an ellipse, and provides a connection passage through which the refrigerant passes between the battery cells.

In addition, the battery module is built into a case providing an accommodation space, and an air supply fan for injecting cooling air into the accommodation space is installed at one end of the case, and an exhaust fan is installed at the other end of the case.

The battery cooling system using the air conditioner refrigerant of the present invention as described above diverts the refrigerant of the air conditioner installed in the vehicle to the outside of the air conditioner so that it is in direct contact with the cells inside the battery, so that the cooling effect is excellent, and it can be used for a long time. Allows the battery to maintain an optimal temperature range.

In addition, since the cooling efficiency by the refrigerant is superior, the problem caused by vibration and noise can be solved at the same time by minimizing the use of the cooling fan installed together or by stopping the operation altogether.

1 is a block diagram showing the overall structure of a battery cooling system using an air conditioner refrigerant according to an embodiment of the present invention.
2 is a view for explaining the concept of a battery cooling system using an air conditioner refrigerant according to an embodiment of the present invention.
FIG. 3 is a diagram schematically illustrating an internal structure of the battery device shown in FIG. 1 .
4 is a view showing the first and second cooling chambers shown in FIG. 3 together with the battery module.
FIG. 5 is a view for explaining another example of the first and second cooling chambers of FIG. 3 .
6 is a cutaway perspective view of the second cooling chamber shown in FIG. 5 .
7 is a view illustrating a cooling chamber having a different structure applicable to a battery cooling system using an air conditioner refrigerant according to an embodiment of the present invention.
8 is an exploded and cut perspective view of the cooling chamber of FIG. 7 .
9A to 9D are plan views illustrating various modified examples of the cell housing shown in FIG. 8 .

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

The battery cooling system using the air conditioner refrigerant of the present invention has a configuration in which a part of the refrigerant used in the air conditioner is sent to the battery, and the refrigerant cools the heat of the battery.

The basic structure of such a cooling system includes: a battery module including a plurality of battery cells and connected to an external power load; It is mounted on the battery module and passes through the refrigerant supplied from the external air conditioner into the inside, and consists of a refrigerant inducing part that allows the refrigerant to cool the battery module.

Although the embodiment to be described below targets a battery installed in an electric vehicle, a hybrid vehicle, or a hydrogen vehicle as a cooling target, even in fields or equipment other than the vehicle, if the air conditioner and the battery are the components, the cooling system of the present invention can be freely used. can be applied

1 is a block diagram showing the overall structure of a battery cooling system 17 using an air conditioner refrigerant according to an embodiment of the present invention, and FIG. 2 is a concept of a battery cooling system using an air conditioner refrigerant according to an embodiment of the present invention. It is a block diagram for explaining.

As shown, a battery cooling system 17 is applied to the vehicle 10 . The vehicle 10 includes an electric vehicle hybrid vehicle and a hydrogen vehicle.

The vehicle 10 includes an air conditioner 11 , a battery device 20 , a drive motor 90 , a control unit 70 , and a pump 80 . The air conditioner 11 is a general air conditioner that supplies cold air to the interior space of the vehicle, and has the structure of FIG. 2 .

The air conditioner 11 includes a compressor 11a, a condenser 11b, an expansion valve 11c, and an evaporator 11d, and generates cool air in a conventional manner and supplies it to the interior space of the vehicle.

The battery device 20 is installed on the floor in consideration of the center of gravity of the vehicle 10, and its internal structure will be described later with reference to FIG. 3 or less. The battery device 20 is connected to the drive motor 90 through the power line 15 . The drive motor 90 receives power from the battery device 20 to rotate the wheels of the vehicle.

In addition, the air conditioner 11 and the battery device 20 are connected through a refrigerant supply pipe 12 and a refrigerant return pipe 13 . The refrigerant supply pipe 12 is a pipe that guides a part of the refrigerant circulating in the air conditioner 11 to the battery device 20 and is opened and closed by the main valve 12a. The refrigerant return pipe 13 is a pipe that returns the refrigerant that has passed through the battery device 20 to the air conditioner 11 . A pump 80 may be mounted on the refrigerant return pipe 13 .

Further, the refrigerant supply pipe 12 is connected between the expansion valve 11c and the evaporator 11d. The refrigerant cooled while passing through the expansion valve 11c is guided to the battery device 20 . Also, the refrigerant return pipe 13 is connected between the evaporator 11d and the compressor 11a. The refrigerant that has completed the cooling task of the battery device 20 is returned to the air conditioner 11 and directed toward the compressor 11a.

Reference numerals 11e and 11f denote three-way valves. The three-way valves 11e and 11f are controlled by the control unit 70 and adjust the amount of refrigerant transferred from the air conditioner to the battery device 20 . When the three-way valves 11e and 11f are completely shut off, there is no refrigerant supply to the battery device 20 .

The pump 80 serves to pump the refrigerant passing through the battery device 20 and forcibly transport it to the air conditioner. The operation of the pump 80 enables smoother bypass flow of the refrigerant. The position of the pump 80 may vary as needed, as long as it can serve this role.

Reference numeral 60 denotes a sensor. The sensor 60 detects the internal temperature of the battery device 20 and transmits the detected content to the controller 70 . The control unit 70 controls the main valve 12a and the pump 80, and when the battery device 20 is overheated, the main valve 12a is opened and the pump 80 is operated, so that the refrigerant inside the air conditioner is discharged. to pass through the battery device 20 . In a state in which the battery device 20 is not overheated, the main valve 12a is blocked and the pump 80 does not operate. Of course, this series of operations is performed while the air conditioner 11 is in operation.

FIG. 3 is a diagram schematically illustrating an internal structure of the battery device 20 shown in FIG. 1 .

As shown, the battery device 20 includes a case 21 having an accommodating space 21a, a plurality of battery modules 22 disposed inside the case 21, and upper and lower portions of each battery module 22 . It has a refrigerant induction part to be mounted. The refrigerant inducing unit includes a first cooling chamber 27 and a second cooling chamber 28 .

The case 21 serves to receive and protect the battery module 22 and the refrigerant induction unit. To this end, a separate support bracket or a buffer member (not shown) for supporting the battery module 22 inside the case 21 may be applied.

In addition, an air supply fan 26a is installed at one end of the case 21, and an exhaust fan 26b is installed at the other end thereof. The air supply fan 26a serves to guide the outside air into the receiving space 21a, and the exhaust fan 26b serves to discharge the air inside the case 21 to the outside. The air supply fan 26a and the exhaust fan 26b are located opposite to each other with the plurality of battery modules 22 interposed therebetween.

The air supplied into the receiving space 21a through the air supply fan 26a flows inside the case 21 to cool the battery module 22, and drives the stagnant gas to the outside.

Meanwhile, the battery module 22 is a power supply unit composed of a plurality of battery cells 23 , and maintains a state of being electrically connected to an external power load, for example, the drive motor 90 through the power line 15 . In addition, the battery cells 23 are internally interconnected through a connection wire 24 or a conductive nickel tape (not shown).

The battery cell 23 includes a cylindrical body portion 23a, a positive electrode portion 23b located at one end of the body portion 23a, and a negative electrode portion 23c located opposite to the positive electrode portion 23b. is composed In addition, in the battery module 22 , the installation direction of the individual battery cells 23 may be changed as needed. For example, the positive electrode portion 23b of the individual battery cell 23 may face upward or downward.

The refrigerant inducing unit includes a first cooling chamber 27 covering the upper portion of the battery module 22 and a second cooling chamber 28 covering the lower portion. The structures of the first and second cooling chambers 27 and 28 may be variously changed, and a description thereof will be given later.

Also, the first cooling chamber 27 and the second cooling chamber 28 communicate with each other through the refrigerant transfer tube 25 . That is, the first cooling chamber 27 is connected in series with each other through the refrigerant transfer tube 25 , and the second cooling chamber 28 is also connected to the second cooling chamber 28 by the refrigerant transfer tube 25 .

Therefore, some of the refrigerant supplied in the direction of arrow a through the refrigerant supply pipe 12 continuously passes through the plurality of first cooling chambers 27 and the refrigerant transfer tube 25 and is discharged to the refrigerant return pipe 13, and the remaining The refrigerant passes through the second cooling chamber 28 and the refrigerant transfer tube 25 and exits to the refrigerant return pipe 13 . The refrigerant collected again in the refrigerant return pipe 13 flows in the direction of the arrow b and returns to the air conditioner.

On the other hand, the reason that the first and second cooling chambers 27 and 28 are positioned above and below the battery module 22 is that the positive electrode part 23b and the negative electrode part 23c of the battery cell 23 are concentrated. for cooling As is known, the parts where heat is most severe in the battery cell 23 are the positive electrode part 23b and the negative electrode part 23c, so even if only the positive electrode part 23b and the negative electrode part 23c are cooled, sufficient cooling is performed. effect can be obtained.

The body portion 23a exposed between the first and second cooling chambers 27 and 28 is cooled by the cold air introduced through the air supply fan 26a.

FIG. 4 is a view showing the first and second cooling chambers 27 and 28 shown in FIG. 3 together with the battery module 22 .

As shown, the first cooling chamber 27 is mounted on the upper end of the battery module 22 . The first cooling chamber 27 has a width capable of covering the upper portion of the battery module 22 . Since the battery module 22 has a rectangular shape, the first cooling chamber 27 has a rectangular plate shape.

In addition, the first cooling chamber 27 has a refrigerant passage 27a for accommodating the upper end of the battery cell 23 and allowing the refrigerant to pass therethrough. The refrigerant passage 27a is a space through which the refrigerant supplied from the air conditioner passes, and the upper end of the battery cell 23 is hermetically accommodated. The thickness T of the first cooling chamber 27 is appropriately designed to accommodate the positive electrode portion 23b and the negative electrode portion of the battery cell 23 .

In addition, a plurality of mounting holes 27c are provided on the bottom surface of the first cooling chamber 27 . The mounting hole 27c is a through hole through which the upper end of the battery cell 23 passes upward, and has a seal 27d on its inner circumferential surface. The seal 27d prevents refrigerant from leaking between the mounting hole 27c and the gap between the battery cell 23 .

The second cooling chamber 28 has a width that can cover the lower portion of the battery module 22, and a plurality of mounting holes 28c into which the lower end of the battery cell 23 is fitted are formed on the upper surface thereof. Of course, the seal 27d is fitted in the gap between the mounting hole 28c and the battery cell 23 . The size and configuration of the second cooling chamber 28 is the same as that of the first cooling chamber 27 .

As described above, the upper end and lower end of the battery cell 23 constituting the battery module 22 is accommodated in the first and second cooling chambers 27 and 28, and the refrigerant is supplied through the refrigerant passages 27a and 28a. When passing, heat exchange between the refrigerant and the battery cell is made to cool the battery cell 23 . The refrigerant after heat exchange with the battery cell is transferred to the compressor ( 11a in FIG. 2 ) through the refrigerant return pipe 13 .

FIG. 5 is a partial cross-sectional view for explaining another example of the first and second cooling chambers 27 and 28 shown in FIG. 3 , and FIG. 6 is a cutaway perspective view of the second cooling chamber 28 shown in FIG. 5 . The structures of the first and second cooling chambers 27 and 28 are identical to each other.

As shown, a long hole type mounting hole 27f having a predetermined width and extending in the longitudinal direction is formed on the bottom surface of the first cooling chamber 27 . The mounting hole 27f takes the form of a long hole and accommodates the upper ends of the plurality of battery cells 23 .

In particular, the refrigerant passage (27a) of the first cooling chamber (27) is sealed with a blocking film (29). The refrigerant passing through the refrigerant passage (27a) does not leak to the outside of the first cooling chamber (27) by the blocking film (29). The blocking film 29 is a heat-resistant elastic sheet and has thermal conductivity, elasticity, and waterproof properties.

The blocking film 29 is adhesively fixed to the edge of the mounting hole 27f, and when the upper end of the battery cell 23 is inserted into the mounting hole 27f, it is pressed against the battery cell and elastically deformed. That is, it is pushed into the refrigerant passage 27a by the battery cell. Even so, since the blocking film 29 has elasticity, it surrounds the battery cell 23 inside the first cooling chamber 27 and maintains a close contact state. The refrigerant passing through the refrigerant passage (27a) and the electrode parts (23b, 23c) can freely exchange heat through the blocking film (29).

The second cooling chamber 28 also has the same structure as the first cooling chamber 27 . As shown in FIG. 6 , a plurality of mounting holes 28f are formed on the upper surface of the second cooling chamber 28 , and the mounting holes 28f are blocked by a blocking film 29 . The blocking film 29 seals the refrigerant passage 28a, and blocks the refrigerant from leaking to the outside through the mounting hole 28f.

When the battery cell 23 is inserted into the mounting hole 28f, the blocking film 29 is pressed to the lower end of the battery cell 23 to elastically deform, and is pushed into the second cooling chamber 28 . The heat exchange between the refrigerant passing through the refrigerant passage 28a and the negative electrode portion 23c of the battery cell 23 through the blocking film 29 is as described above.

7 is a view showing the first and second cooling chambers 27 and 28 having different structures applicable to a battery cooling system using an air conditioner refrigerant according to an embodiment of the present invention, and FIG. It is an exploded and cut perspective view of the first and second cooling chambers.

Referring to the drawings, it can be seen that the vertical cell housing 33 is installed between the first cooling chamber 27 and the second cooling chamber 28 . The cell housing 33 is a tube that communicates the refrigerant passage 27a of the first cooling chamber 27 with the refrigerant passage 28a of the second cooling chamber 28, and accommodates the battery cell 23 therein. do. A connection passage 33a through which the refrigerant passes is provided between the battery cell 23 and the inner wall surface of the cell housing 33 .

In order to connect the upper and lower ends of the cell housing 33 to the first cooling chamber 27 and the second cooling chamber 28, the lower surface of the first cooling chamber 27 and the upper surface of the second cooling chamber 28 are coupled to each other. Holes 27g and 28g are formed. The upper and lower ends of the cell housing 33 are fixed in a state where the coupling holes 27g and 28g are inserted.

As a result, since the first cooling chamber 27 and the second cooling chamber 28 communicate with each other by the cell housing 33 , the refrigerant flowing into the first cooling chamber 27 fills the refrigerant passage 27a and at the same time After passing through the cell housing 33 to fill the second cooling chamber 28, the refrigerant is discharged to the outside through the refrigerant return pipe (13). Of course, the refrigerant exchanges heat with the battery cell 23 while moving from the first cooling chamber 27 to the second cooling chamber 28 .

The cross-sectional shape of the cell housing 33 can be variously modified as long as the connection passage 33a can be provided in a state in which the battery cell 23 is accommodated. For example, as shown in FIGS. 9A to 9D , it may take the form of a hexagon, an octagon, an ellipse, or a sawtooth shape.

9A to 9D are plan views illustrating various modified examples of the cell housing 33 shown in FIG. 8 .

The cell housing 33 shown in FIG. 9A takes the form of a hollow hexagonal column. The battery cell 23 fitted in the cell housing 33 is closely supported on the inner wall surface of the cell housing 33 and has a plurality of connection passages 33a around it. The cell housing 33 of FIG. 9B takes the form of a hollow octagonal prism, supports the battery cell 23 and provides an outer connection passage 33a.

In addition, the cell housing 33 of FIG. 9C has an elliptical cross-sectional shape and accommodates the battery cell 23 . The battery cell 23 having a circular cross section is supported on the inner wall surface of the cell housing 33 and has connection passages 33a on the left and right sides thereof.

The cell housing 33 shown in FIG. 9D takes the form of a hollow pipe having a certain diameter, but its inner peripheral surface has a sawtooth structure. A plurality of connection passages 33a are formed between the inner circumferential surface of the cell housing 33 and the outer circumferential surface of the battery cell 23 by the teeth.

As a result, the battery cooling system of the present embodiment configured as described above cools the battery by passing a part of the refrigerant of the air conditioner into the battery.

As mentioned above, although the present invention has been described in detail through specific embodiments, the present invention is not limited to the above embodiments, and various modifications are possible by those of ordinary skill within the scope of the technical spirit of the present invention.

10: Vehicle 11: Air conditioner 11a: Compressor
11b: condenser 11c: expansion valve 11d: evaporator
11e, 11f: 3-way valve 12: Refrigerant supply pipe 12a: Main valve
13: Refrigerant return pipe 15: Power line 17: Cooling system
20: battery device 21: case 21a: accommodating space
22: battery module 23: battery cell 23a: body part
23b: positive electrode part 23c: negative electrode part 24: connection wire
25: refrigerant transfer tube 26a: air supply fan 26b: exhaust fan
27: first cooling chamber 27a: refrigerant passage 27c: mounting hole
27d: seal 27f: mounting hole 27g: coupling hole
28: second cooling chamber 28a: refrigerant passage 28c: mounting hole
28f: mounting hole 28g: coupling hole 29: blocking film
33: cell housing 33a: connection passage 60: sensor
70: control unit 80: pump 90: drive motor

Claims (8)

an air conditioner having a compressor, a condenser, an expansion valve, and an evaporator to generate cold air into the interior space of the vehicle;
a battery module including a plurality of battery cells and supplying power to a power load;
and a refrigerant inducing unit mounted on the battery module and passing the refrigerant supplied from an external air conditioner into the battery module and allowing the refrigerant to cool the battery module;
The refrigerant circulates through a compressor, a condenser, an expansion valve, and an evaporator in the air conditioner when not flowing into the battery module,
The refrigerant induction unit,
a refrigerant supply pipe branched between the expansion valve of the air conditioner and the evaporator and connected to the battery module to bypass at least a portion of the refrigerant of the air conditioner directed to the evaporator to the battery module;
a refrigerant return pipe communicating between the battery module and the air conditioner, connected between the evaporator and the compressor of the air conditioner, and returning the refrigerant used in the battery module to the air conditioner;
A battery cooling system using an air conditioner refrigerant, comprising a control unit for controlling an amount of refrigerant bypassed from the air conditioner to the refrigerant supply pipe. According to claim 1,
In the refrigerant induction part,
A battery cooling system using an air conditioner refrigerant, which is connected to the air conditioner through a refrigerant supply pipe and a refrigerant return pipe, and includes a cooling chamber for accommodating a battery cell while passing the refrigerant flowing through the refrigerant supply pipe. 3. The method of claim 2,
The battery cell;
It consists of a body part, an anode electrode part and a cathode electrode part located at the ends of the body part,
The cooling chamber;
A battery cooling system using an air conditioner refrigerant for accommodating the anode electrode part and the cathode electrode part of the battery cell, and cooling the anode electrode part and the cathode electrode part intensively. 4. The method of claim 3,
The cooling chamber;
a first cooling chamber having a width that can cover the upper part of the battery module and having a mounting hole on the bottom surface of which the positive electrode part or the negative electrode part of the battery cell is fitted;
A battery cooling system using an air conditioner refrigerant, comprising: a second cooling chamber having a width to cover a lower portion of the battery module and having a mounting hole on the upper surface of which a negative electrode part or a positive electrode part of a battery cell is fitted. 5. The method of claim 4,
In the first and second cooling chambers, each of the mounting holes is blocked to seal the refrigerant passage in the cooling chamber,
When the battery cell is inserted into the mounting hole, the battery cooling system using an air conditioner refrigerant in which a blocking film is installed to surround the positive and negative electrodes of the battery cell in a state of being elastically deformed by being pressed by the battery cell, and to allow heat exchange in the thickness direction. . 5. The method of claim 4,
A battery cooling system using an air conditioner refrigerant further comprising a cell housing accommodating a battery cell between the first cooling chamber and the second cooling chamber and guiding the refrigerant in the first cooling chamber to the second cooling chamber. 7. The method of claim 6,
A cross-sectional shape of the cell housing is a polygonal or elliptical shape, and a battery cooling system using an air conditioner refrigerant that provides a connection path through which the refrigerant passes between the battery cells. According to claim 1,
The battery module is embedded in a case providing an accommodation space,
A battery cooling system using an air conditioner refrigerant in which an air supply fan for injecting cooling air into the accommodating space is installed at one end of the case, and an exhaust fan is installed at the other end of the case.

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