KR101961796B1 - Cooling and heating system for secondary battery - Google Patents

Abstract

A cooling and heating system for a secondary battery is disclosed. Cooling and heating system of a secondary battery according to an embodiment of the present invention, a secondary battery module including a plurality of battery cells; A temperature and humidity sensor for sensing ambient temperature and humidity; A cooling unit including a compressor and a heat exchanger, the cooling unit cooling the secondary battery module by flowing a coolant; A target temperature is set based on first information which is temperature information of the battery cell and second information which is information of the atmospheric temperature and humidity, to which power is applied from the secondary battery module, controller; And a temperature controller for controlling the cooling unit based on third information, which is temperature information of the heat exchanger, and the target temperature, wherein the cooling unit is configured to cool the refrigerant and to heat the compressor, the heat exchanger, Cooling lines; A four-way valve installed on the cooling line and controlled by the temperature controller to change the flow direction of the refrigerant; And a fan for lowering the temperature of the heat exchanger, wherein the compressor is controlled by the temperature controller from the third information and the target temperature.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling and heating system for a secondary battery,

The present invention relates to a cooling and heating system for a secondary battery, and more particularly, to a cooling and heating system for a secondary battery that uses a coolant to cool and heat a secondary battery.

A secondary battery is a battery capable of being charged and discharged unlike a primary battery which can not be charged. Secondary batteries can significantly reduce the use of fossil fuels, and they are attracting attention as a new energy source for enhancing environmental friendliness and energy efficiency in that no by-products due to energy use are generated at all.

In addition, the secondary battery is easy to apply according to various product groups and has an advantage of having electrical characteristics such as high energy density. Accordingly, portable electronic devices such as portable terminals, notebooks, computers, and camcorders are being used in electric vehicles, hybrid vehicles, and the like.

However, the secondary battery generates heat during repeated charging and discharging. When the temperature rises sharply, the lifetime is shortened and the secondary battery can not be used in an optimum state. Therefore, in order to maintain the optimum performance of the secondary battery, A system is required.

The cooling system of the secondary battery can be classified into an air-cooled type, a water-cooled type, and a coolant-cooled type depending on the type of the cooling fluid.

In the air-cooled cooling system, air in the vehicle interior flows into the battery pack installed in the trunk room of the vehicle through the suction duct when the blower is operated. The introduced air is discharged through the discharge duct after cooling the battery cell through the battery cell built in the battery pack.

Since the cooling efficiency of the air is lowered due to the low heat transfer efficiency of the air, the efficiency of the battery is deteriorated. Also, in the control method, it is difficult to control the temperature inside the battery only by controlling the fan speed of the blower there was. Also, as the capacity of the battery gradually increases, the heat generation will also increase, and current air-cooled battery cooling systems have had limitations in improving the cooling performance.

A water-cooled cooling system is a method using cooling water of an engine. In the water-cooled cooling system, coolant flows into the battery pack. The introduced cooling water is discharged from the battery pack after cooling the battery cell built in the battery pack. The discharged cooling water is cooled by the outside air while passing through the radiator, and then flows back into the battery pack. The circulation of the cooling water is made by the pump.

However, since the temperature of the engine cooling water is too high, practicality deteriorates. In summer, there is a problem that the cooling efficiency of the battery is deteriorated because cooling water needs to be introduced by introducing high-temperature outside air.

In a refrigerant-cooled system, refrigerant and vehicle coolant are used to cool the battery. The coolant is connected to the cooling system of the vehicle, and the low temperature coolant is introduced to maintain the temperature of the cooling water at a low temperature through heat exchange with the cooling water circulating the water-cooled battery cooling system. The cooling water is stored in the reservoir tank, and the cooling water is circulated by a circulation pump provided in a connection line connected to the reservoir tank and forcibly circulating the cooling water.

The water-cooled battery cooling system requires components such as a hose and a clamp separately in the connection line through which the cooling water is circulated, thereby increasing the number of parts and complicating the assembling process.

On the other hand, the life and efficiency of the battery is lowered even when the temperature is too low, so it is necessary to preheat the battery when charging the battery in the winter when the temperature falls below freezing (during cold charging) or when starting the vehicle. However, the conventional battery cooling system as described above does not have a battery warm-up function, so that it is not possible to prevent deterioration of efficiency of the battery when the battery is cold charged or when the vehicle is started, Can not be prevented.

Korean Patent Publication No. 10-2012-0133872 Korean Patent Publication No. 10-2011-0138514 Korean Patent Publication No. 10-2016-0094211

The cooling and heating system of a secondary battery according to the present invention is intended to provide a cooling and heating system for a secondary battery that uses a coolant to cool and heat a secondary battery.

A cooling and heating system for a secondary battery according to the present invention is intended to provide a cooling and heating system for a secondary battery capable of efficiently cooling and heating a secondary battery in consideration of ambient temperature and humidity in addition to the temperature of the secondary battery do.

The cooling and heating system of the secondary battery according to an embodiment of the present invention is intended to provide a cooling and heating system for a secondary battery that can cool or heat the secondary battery only by switching the direction of flow of the refrigerant.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of manufacturing the same.

Cooling and heating system of a secondary battery according to an embodiment of the present invention, a secondary battery module including a plurality of battery cells; A temperature and humidity sensor for sensing ambient temperature and humidity; A cooling unit including a compressor and a heat exchanger, the cooling unit cooling the secondary battery module by flowing a coolant; A target temperature is set based on first information which is temperature information of the battery cell and second information which is information of the atmospheric temperature and humidity, to which power is applied from the secondary battery module, controller; And a temperature controller for controlling the cooling unit based on third information, which is temperature information of the heat exchanger, and the target temperature, wherein the cooling unit is configured to cool the refrigerant to flow through the compressor, the heat exchanger, Cooling lines; A four-way valve installed on the cooling line and controlled by the temperature controller to change the flow direction of the refrigerant; And a fan for lowering the temperature of the heat exchanger, wherein the compressor is controlled by the temperature controller from the third information and the target temperature.

Further, the compressor may be an inverter compressor.

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The four-way valve, the compressor, and the fan may be powered from the temperature controller.

Further, the compressor is an inverter compressor, and the cooling unit includes: a chiller in which a cooling fluid is stored; A refrigerant line passing through the compressor, the heat exchanger and the chiller; And a cooling line through which the cooling fluid stored in the chiller flows and is passed through the secondary battery module.

The apparatus may further include a heater for heating the secondary battery module and receiving power from the temperature controller.

The embodiments of the present invention have at least the following effects.

The cooling and heating system of the secondary battery according to the present invention regulates the operation rate of the compressor in consideration of the ambient temperature and the humidity in addition to the temperature of the secondary battery. Therefore, the cooling and heating of the secondary battery, which can efficiently and accurately cool the secondary battery, And a heating system are provided.

In addition, since the operating rate of the compressor is controlled in consideration of the ambient temperature and humidity in addition to the temperature of the secondary battery, the risk of deteriorating the performance of the secondary battery can be prevented.

According to an embodiment of the present invention, the secondary battery can be cooled and heated only by the refrigerant.

Further, the secondary battery can be cooled or heated only by switching the flow direction of the refrigerant, so that the structure is relatively simple.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a schematic diagram of a cooling and heating system of a secondary battery according to a first embodiment of the present invention.
FIG. 2 is a view schematically showing a control relationship of the cooling and heating system of the secondary battery according to the first embodiment of the present invention. FIG.
3 is a schematic diagram of a cooling and heating system for a secondary battery according to a second embodiment of the present invention.
4 is a schematic view illustrating a control relationship of a cooling and heating system of a secondary battery according to a second embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described below in detail with reference to the drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in various other forms, including modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Prior to the description, the terms described in the detailed description will be described. In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention. Also, the singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the term " comprises, " or " having ", means that there are features, numbers, steps, operations, elements, parts, or combinations thereof described in the specification, Is not excluded in advance. It should be noted that terms such as " ... unit ", " unit of means ", " part of item ", " absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

Also, in the drawings, for convenience of explanation, the components may be exaggerated or reduced in size. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

FIG. 1 is a schematic diagram of a cooling and heating system of a secondary battery according to a first embodiment of the present invention. FIG. 2 is a schematic view showing a control relationship of a cooling and heating system of a secondary battery according to a first embodiment of the present invention. Fig.

The cooling and heating system 1000 of the secondary battery according to the first embodiment of the present invention is capable of cooling or heating the secondary battery only by changing the flow direction of the refrigerant in consideration of the ambient temperature and humidity in addition to the temperature of the secondary battery Humidity sensor 200, a main controller 300, a cooling unit 400, and a temperature controller 500, as shown in FIGS. 1 and 2. In Fig. 1, a solid line indicates power supply, and a chain line indicates transmission of temperature information.

The secondary battery module 100 includes a battery including a plurality of battery cells and a battery management system (BMS) for controlling and protecting the battery.

The battery management system is connected to the battery and can control the overall operation of the battery according to a control command or an internal algorithm. For example, the battery management system can perform an overcharge protection function, an over discharge protection function, an over current protection function, an over voltage protection function, an overheat protection function, and a cell balancing function. In addition, the battery management system can obtain voltage, current, temperature, remaining power, life, state of charge (SOC), and the like of the battery.

Battery management information of the battery management system is transmitted to the main controller 300. If there is a problem with the battery, the main controller 300 can turn off the operation of the battery.

The performance of the secondary battery module 100 varies depending on the temperature. When the temperature is too high, there is a problem that the battery cell is destroyed and the battery is not charged, and when the temperature is low, the efficiency is lowered. Therefore, it is required to be maintained at an appropriate temperature, and it is desirable that the temperature is preferably maintained at a temperature of 20 to 40 DEG C, which is the highest efficiency.

A plurality of first temperature sensors (not shown) are mounted on the secondary battery module 100. The first temperature sensor is configured to sense the temperature of a plurality of battery cells and is provided to correspond to the number of battery cells. In this embodiment, the battery is composed of 16 battery cells, and the first temperature sensor is also provided with 16 sensors to sense the temperature of each battery cell. The first information, which is the temperature information of the sensed battery cell, is transmitted to the main controller 300.

The temperature / humidity sensor 200 is configured to sense ambient temperature and humidity. Here, the atmospheric temperature and the atmospheric humidity mean the temperature and humidity of the space in which the secondary battery module 100 is installed. For example, when the secondary battery module 100 is installed in a predetermined chamber, the atmospheric temperature and the atmospheric humidity refer to the temperature and humidity in the chamber, respectively. The second information, which is the ambient temperature and humidity information sensed by the temperature / humidity sensor 200, is transmitted to the main controller 300. The temperature and humidity sensor 200 may be mounted on the main controller 300.

The temperature of the secondary battery module 100 is not considered only in consideration of the temperature of the secondary battery module 100 when the secondary battery module 100 is cooled, In consideration of the above information.

The main controller 300 controls the cooling and heating system 1000 of the secondary battery according to the present invention. The main controller 300 is driven by receiving power from the secondary battery module 100. Specifically, when the battery is being charged by an external power source, an external power source is used together with the battery. In an uncharged state such as a fully charged state, the battery is driven by receiving power from the battery.

The main controller 300 receives first information, which is temperature information of a plurality of battery cells, from the first temperature sensor. Also, the second information, which is atmospheric temperature and humidity information, is received from the temperature / humidity sensor 200.

When the temperature difference between the ambient temperature and the battery cell is large, the operation rate of the compressor 410 described later is increased. Therefore, when the ambient temperature is low, when the operation rate is added to the compressor 410 to raise the temperature of the battery cell to the predetermined target temperature, the problem arises that the temperature is not raised to the target temperature. If the humidity is high, problems such as short-circuiting and short-circuiting of the battery may occur. Accordingly, the main controller 300 sets the target temperature through the logic in consideration of the first information and the second information. That is, in order to maintain an appropriate temperature of the secondary battery module 100, the target temperature is set in consideration of the atmospheric temperature and the humidity, not the temperature of the battery cell alone, and the target temperature is transmitted to the temperature controller 500.

In addition, the main controller 300 can control not only the target temperature but also whether the secondary battery module 100 and the cooling unit 400 are driven. Therefore, when the humidity is too high, the humidity can be lowered by driving the cooling unit 400 to be described later, rather than driving the battery.

Also, the management information of the secondary battery module 100 of the battery management system is transmitted to the main controller 300, and the control of the secondary battery module 100 according to the management information is as described above.

The cooling unit 400 is configured to cool and heat the secondary battery module 100 by switching the flow direction of the coolant. The cooling unit 400 includes a compressor 410, a heat exchanger 420 and a fan 430, a cooling line 440 and a four-way valve 450.

The compressor (410) compresses the refrigerant. The compressor 410 is provided as an inverter compressor and is driven by power from the secondary battery module 100 like the main controller 300, and the operation rate is controlled by the temperature controller 500.

The heat exchanger 420 is configured to condense a refrigerant in a high-temperature and high-pressure state. When the secondary battery module 100 is cooled, the refrigerant compressed by the compressor 410 flows into the heat exchanger and is condensed. Since the high temperature refrigerant flows into the heat exchanger (420), the temperature of the heat exchanger (420) rises during the condensation of the refrigerant, and the fan (430) lowers the temperature of the heat exchanger (420). The fan 430 is controlled by a temperature controller 500.

A second temperature sensor 421 is installed in the heat exchanger 420 and third information which is temperature information of the heat exchanger 420 is transmitted to the temperature controller 500. This will be described later.

The cooling line 440 is a structure in which the refrigerant flows. The cooling line 440 passes through the compressor 410, the heat exchanger 420, and the secondary battery module 100. In this embodiment, the secondary battery module 100 is placed on a region composed of a plurality of bends and straight tubes of the cooling line 440 and cooled or heated by the refrigerant.

A four-way valve 450 is installed in the cooling line 440. The four-way valve 450 is a structure for switching the flow direction of the refrigerant. The flow of the coolant is switched by the four-way valve 450 so that the secondary battery module 100 is cooled or heated. When the secondary battery module 100 is cooled, the refrigerant is compressed by the compressor 410 and condensed in the heat exchanger 420. In the process of passing through the capillary of the cooling line 440, the expanded and cooled refrigerant passes through the region where the secondary battery module 100 is seated and cools the secondary battery module 100. When the secondary battery module 100 is heated, the four-way valve 450 is driven to change the flow direction of the refrigerant so that the high-temperature and high-pressure refrigerant compressed by the compressor 410 flows through the secondary battery module 100 Heating is performed. The four-way valve 450 is controlled by a temperature controller 500.

The temperature controller 500 controls the cooling unit 400 to cool or heat the secondary battery module 100. The main controller 300 sets the target temperature through the logic from the first information and the second information, and the set target temperature is transmitted to the temperature controller 500. The temperature controller 500 receives the third information from the second temperature sensor 421 mounted on the heat exchanger 420 and the temperature controller 500 controls the temperature of the compressor 100).

That is, the temperature controller 500 does not control the operation rate of the compressor 410 only by the target temperature received from the main controller 300, but controls the operation of the compressor 410 in consideration of the target temperature and the temperature of the heat exchanger 420 Control the operation rate.

The temperature controller 500 receives from the main controller 300 whether or not the secondary battery module 100 is to be cooled or heated and supplies power to the four-way valve 450 to turn on / off the four- Thereby controlling the flow direction of the refrigerant. Also, the temperature controller 500 supplies power to the fan 430 to drive the fan 430.

That is, the temperature controller 500 receives the target temperature set through the logic from the first information and the second information, receives the third information, which is the temperature of the heat exchanger 420, Four-way valves, fans).

Now, the operation of the cooling and heating system of the secondary battery according to the first embodiment of the present invention will be described.

The secondary battery module 100 is controlled / managed by a battery management system, and this information is transmitted to the main controller 300. The temperature of the plurality of battery cells of the secondary battery module 100 is sensed by the first temperature sensor And transmitted to the main controller 300.

The temperature and humidity sensor 200 senses the temperature and humidity of the space in which the secondary battery module 100 is installed, for example, the inside of the chamber, and this information is transmitted to the main controller 300.

The main controller 300 controls whether the secondary battery module 100 is driven through the management information received from the battery management system. Also, the target temperature is set through the first information and the second information, and then the target temperature is transmitted to the temperature controller 500.

The temperature controller 500 determines whether the four-way valve 450 is turned on or off through the third information received from the second temperature sensor 421 and the target temperature received from the main controller 300, And controls the respective components of the cooling unit 400. [

The refrigerant is compressed at a high temperature and a high pressure by the compressor 410 and flows through the cooling line 440 into the heat exchanger 420. The refrigerant is condensed in the heat exchanger 420, 100 to cool the secondary battery module 100, and then flows into the compressor 410 again.

Meanwhile, when the secondary battery module 100 is heated, the temperature controller 500 controls the four-way valve 450 to change the flow direction of the refrigerant.

Next, a cooling and heating system for a secondary battery according to a second embodiment of the present invention will be described.

FIG. 3 is a schematic diagram of a cooling and heating system for a secondary battery according to a second embodiment of the present invention. FIG. 4 is a schematic view showing a control relationship of a cooling and heating system of a secondary battery according to a second embodiment of the present invention. Fig. In Fig. 3, a solid line indicates power supply and a chain line indicates transmission of temperature information.

The cooling and heating system 2000 of the secondary battery according to the second embodiment of the present invention can cool or heat the secondary battery in consideration of the ambient temperature and humidity in addition to the temperature of the secondary battery. Humidity sensor 200, a main controller 300, a cooling unit 600, a temperature controller 700, and a heater 800. The secondary battery module 100 includes a secondary battery module 100, a temperature / humidity sensor 200, The secondary battery module 100, the temperature / humidity sensor 200, and the main controller 300 are the same as those of the first embodiment, and thus a duplicate description thereof will be omitted. This embodiment differs from the first embodiment in that the secondary battery module is cooled / heated by switching the flow direction of the refrigerant in that the secondary battery module is cooled / heated using the cooling fluid cooled by the coolant and the heater .

The cooling unit 600 is configured to heat the secondary battery module 100. The cooling unit 600 includes a compressor 610, a heat exchanger 620 and a fan 630, a chiller 640 and a refrigerant line 650, and a cooling line 660 and a pump 670.

The compressor 610 compresses the refrigerant. The compressor 610 is provided as an inverter compressor and is driven by power from the secondary battery module 100 like the main controller 300, and the operation rate is controlled by the temperature controller 700.

The heat exchanger 620 is configured to condense refrigerant in a high temperature and high pressure state. When the secondary battery module 100 is cooled, the refrigerant compressed by the compressor 610 flows into the heat exchanger 620 and is cooled. Since the high temperature refrigerant flows into the heat exchanger 620, the temperature of the heat exchanger 620 rises during the condensation of the refrigerant, and the fan 630 lowers the temperature of the heat exchanger 620 that has been heated. The fan 630 is controlled by the temperature controller 700.

The chiller 640 is a structure in which a cooling fluid for cooling the secondary battery module 100 is stored. The cooling fluid may be cooling water. The refrigerant line 650 flows through the refrigerant line 650 and the heat exchanger 620 and the chiller 640.

The refrigerant is compressed to a high temperature and a high pressure by the compressor 610 and flows through the refrigerant line 650. The refrigerant then flows into the heat exchanger 620 and is condensed. The refrigerant is compressed while passing through the capillary tube, The cooling water is cooled and then flows into the compressor 610 again.

The cooling line 660 is configured to circulate cooling water of the chiller 640 toward the secondary battery module 100 to cool the secondary battery module 100 using cooling water. The cooling line 660 is provided with a pump 670 and the cooling water inside the chiller 640 flows to the secondary battery module 100 side by the pump 670 to cool the secondary battery module 100. The pump 670 is driven by receiving power from the temperature controller 700.

The cooling line 660 may be provided with a hose since the cooling water flows. Since the hose is made of a flexible material, it can be easily installed regardless of the place, and the length is not limited.

The heater 800 is configured to cool the secondary battery module 100. The heater 800 is installed in the secondary battery module 100. The heater 800 is driven by receiving power from the temperature controller 700. At this time, since the power consumption of the heater 800 is large, the relay can be installed. In addition, it can be driven by supplying power from a battery if necessary.

The temperature controller 700 controls the cooling unit and the heater 800 to cool or heat the secondary battery module 100. The main controller 300 sets the target temperature through the logic from the first information and the second information, and the set target temperature is transmitted to the temperature controller 700. Third information is received from the second temperature sensor 621 mounted on the heat exchanger 620 in the temperature controller 700. The temperature controller 700 receives the third information from the compressor 700 through the received target temperature and the temperature of the heat exchanger 620 610).

That is, the temperature controller 700 does not control the operation rate of the compressor 610 based only on the target temperature received from the main controller 300, but controls the operation rate of the compressor 610 in consideration of the target temperature and the temperature of the heat exchanger 620 .

The temperature controller 700 drives the pump 670 when cooling the secondary battery module 100 so that the cooling water flows through the cooling line 660 to cool the secondary battery module 100. When the temperature of the secondary battery module 100 is required to be raised, the temperature controller 700 turns off the operation of the pump 670 and applies power to the heater 800 to drive the heater 800.

Now, the operation of the cooling and heating system of the secondary battery according to the second embodiment of the present invention will be described.

The secondary battery module 100 is controlled / managed by a battery management system, and this information is transmitted to the main controller 300. The temperature of the plurality of battery cells of the secondary battery module 100 is sensed by the first temperature sensor And transmitted to the main controller 300.

The temperature and humidity sensor 200 senses the temperature and humidity of the space in which the secondary battery module 100 is installed, for example, the inside of the chamber, and this information is transmitted to the main controller 300.

The main controller 300 controls whether the secondary battery module 100 is driven through the management information received from the battery management system. In addition, the target temperature is set through the first information and the second information, and is transmitted to the temperature controller 700.

The temperature controller 700 determines whether the pump 670 and the heater 800 are turned on or off through the third information received from the second temperature sensor 621 and the target temperature received from the main controller 300, And then controls the respective components of the cooling unit 600. [0052]

The refrigerant is compressed at a high temperature and a high pressure in the compressor 610 and flows into the refrigerant line 650 and flows into the heat exchanger 620. The refrigerant is condensed in the heat exchanger 620, Absorbs the heat of the internal cooling water, and then flows into the compressor 610 after cooling the cooling water.

The temperature controller 700 drives the pump 670 to cool the secondary battery module 100 to flow the cooling water cooled by the refrigerant. The cooling water flows along the cooling line 660 and absorbs the heat of the secondary battery module 100 to cool the secondary battery module 100. Meanwhile, when the secondary battery module 100 is heated, the temperature controller 700 stops driving the pump 670 and drives the heater.

Therefore, according to the present invention, there is provided a cooling and heating system for a secondary battery capable of efficiently cooling or heating a secondary battery in consideration of ambient temperature and humidity in addition to the temperature of the secondary battery.

The use of all examples or exemplary language (e.g., etc.) in this invention is for the purpose of describing the present invention only in detail and is not intended to be limited by the scope of the claims, But is not limited thereto. It will also be appreciated by those skilled in the art that various modifications, combinations, and alterations may be made depending on design criteria and factors within the scope of the appended claims or equivalents thereof.

Accordingly, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all ranges that are equivalent to or equivalent to the claims of the present invention as well as the claims Category.

1000, 2000: Secondary battery cooling and heating system
100: Secondary battery module 200: Temperature and humidity sensor
300: main controller 400, 600: cooling unit
410, 610: compressors 420, 620: heat exchanger
430, 630: Fan 440, 660: Cooling line
450: Four-way valve 640: Chiller
650: Refrigerant line 670: Pump
500, 700: Temperature controller 800: Heater

Claims (6)

A secondary battery module including a plurality of battery cells;
A temperature and humidity sensor for sensing ambient temperature and humidity;
A cooling unit including a compressor and a heat exchanger, the cooling unit cooling the secondary battery module by flowing a coolant;
A target temperature is set based on first information which is temperature information of the battery cell and second information which is information of the atmospheric temperature and humidity, to which power is applied from the secondary battery module, controller; And
And a temperature controller for controlling the cooling unit based on third information that is temperature information of the heat exchanger and the target temperature,
The cooling unit includes:
A cooling line through which the refrigerant flows and flows through the compressor, the heat exchanger, and the secondary battery module;
A four-way valve installed on the cooling line and controlled by the temperature controller to change the flow direction of the refrigerant; And
Further comprising a fan for lowering the temperature of the heat exchanger,
Wherein the compressor is controlled in operation rate by the temperature controller from the third information and the target temperature.
The method according to claim 1,
Wherein the compressor is an inverter compressor.
delete 3. The method of claim 2,
Wherein the four-way valve, the compressor, and the fan are powered from the temperature controller.
The method according to claim 1,
Wherein the compressor is an inverter compressor,
The cooling unit includes:
A chiller in which the cooling fluid is stored;
A refrigerant line passing through the compressor, the heat exchanger and the chiller;
And a cooling line through which the cooling fluid stored in the chiller flows and flows through the secondary battery module.
6. The method of claim 5,
And a heater for heating the secondary battery module and receiving power from the temperature controller.

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