WO2017026634A1

WO2017026634A1 - Heat exchange device for battery of electric vehicle

Info

Publication number: WO2017026634A1
Application number: PCT/KR2016/005696
Authority: WO
Inventors: 김홍석; 문정욱; 박내현; 김주현
Original assignee: 엘지전자 주식회사
Priority date: 2015-08-13
Filing date: 2016-05-30
Publication date: 2017-02-16
Also published as: KR101724296B1; KR20170020103A; CN107925141A

Abstract

The present invention relates to a heat exchange device for a battery of an electric vehicle. Specifically, the present invention comprises: a refrigerant circulation unit configured to circulate a refrigerant while forming a refrigeration cycle; and a heat exchange unit for a battery, which is supplied with the refrigerant expanded through an expander of the refrigerant circulation unit so as to cool a battery pack module, and discharges the refrigerant to the refrigerant circulation unit, thereby providing an advantage of improving battery cooling performance.

Description

Battery heat exchanger for electric vehicles

The present invention relates to a battery heat exchanger of an electric vehicle, and more particularly, by installing a battery pack module by reducing the overall weight and volume installed in the vehicle body compared to the existing, it is possible to improve driving distance and improve heat exchange performance. The present invention relates to a battery heat exchanger of an electric vehicle.

In general, an electric vehicle (EV) is mainly a vehicle that obtains power by driving an AC or DC motor using a battery power, and is classified into a battery-only electric vehicle and a hybrid electric vehicle. The motor is driven by using the battery power and recharged when the power is exhausted. The hybrid electric vehicle uses the fossil fuel to operate the engine to generate electricity to charge the battery and use the electricity to drive the electric motor. It is configured to move the body.

Such an electric vehicle is provided with a battery pack module for supplying current to the motor.

Here, the battery pack module generates a predetermined heat while being operated, and the operating time of the battery pack module varies depending on the surrounding temperature. Most electric vehicles cool the heat generated from the battery pack module, or By applying heat arbitrarily, the operating time of the battery pack module is extended.

The battery pack module can be cooled by water or air cooling, and in the case of water cooling, the refrigerant cools the cooling water while passing through the water refrigerant heat exchanger, and the water refrigerant heat exchanger is connected to the battery pack module and the cooling water circuit so that the cooling water is connected to the water refrigerant heat exchanger. It is configured to cool the battery pack module while circulating the battery pack module, in the case of the empty cooling, the refrigerant passes through the battery cooling evaporator to cool the battery cooling evaporator, the air cooled in the battery cooling evaporator is the battery pack module Flow through the connection duct of the battery pack module is configured to cool the battery pack module.

On the other hand, the heating method of the battery pack module may be configured to heat using heat generated from the refrigerant condensed in the above-described water-cooled and air-cooled cooling method, or to connect a separate heater to the battery pack module to heat.

However, one example of the battery heat exchange device of the electric vehicle according to the prior art configured as described above, in particular, in the case of cooling the battery pack module, the battery pack using a separate cooling water and air, instead of using the cool air of the refrigerant directly When the module is cooled, there is a problem that the heat exchange performance is lowered.

In addition, one example of the battery heat exchange device of the electric vehicle according to the prior art, the essential weight, such as a separate water refrigerant heat exchanger and the various cooling water flow pipes constituting the cooling water circuit, the total weight of the electric vehicle is increased to the same volume While the driving distance of the electric vehicle by the battery pack module is shortened, it occupies a predetermined installation volume, and the size of the battery pack module that can be installed by that amount is relatively reduced, thereby lowering overall battery performance.

In addition, the layout design of the water-cooling heat exchanger and various cooling water flow pipes and the number of work connecting the same increases, there is a very serious problem of unnecessary waste of labor.

The present invention has been made to solve the above technical problem, by reducing the overall weight and volume installed in the vehicle body compared to the existing battery pack module by installing the module to improve the mileage, heat exchange performance can be improved It is an object to provide a battery heat exchanger.

A preferred embodiment of the battery heat exchange apparatus of an electric vehicle according to the present invention comprises a refrigerant circulation unit configured to circulate a refrigerant while constituting a refrigeration cycle, and a battery pack module supplied with an expanded refrigerant through an expander among the refrigerant circulation units. And a battery heat exchange unit for cooling and discharging the refrigerant to the circulation portion, wherein the battery heat exchange unit includes a plurality of heat conduction plates disposed in thermal contact with a plurality of cells constituting the battery pack module, and one surface of the heat conduction plate. And a plurality of cooling tubes arranged in close contact with each other, and a plurality of heating plates disposed in close contact with one surface of the heat conductive plate between each of the plurality of cooling tubes.

Here, the cooling tube may be bonded to one surface of the plurality of heat conductive plates by a brazing bonding method, or may be manufactured by extrusion molding with the plurality of heat conductive plates.

In addition, the heating plate may be bonded to one surface of the plurality of heat conductive plates by a printing method or clamped to a clamping part formed on one surface of the plurality of heat conductive plates.

In addition, the plurality of heat conductive plates may be formed to have an area corresponding to the contact surface shape of the plurality of cells in contact.

The battery heat exchange unit may include a distribution piping module configured to receive the refrigerant from the expander and to distribute the supplied refrigerant to the plurality of heat conductive plates, and a discharge pipe configured to collect the refrigerant from the plurality of heat conductive plates and discharge the refrigerant to the refrigerant circulation unit. The module may further include.

The battery heat exchange unit may further include a refrigerant distributor configured to uniformly distribute the refrigerant supplied from the expander to the plurality of heat conductive plates, and the distribution piping module may include an expander-distributor connecting the expander and the refrigerant distributor. A connecting pipe, a plurality of supply pipes branched from the refrigerant distributor, and connected to the plurality of heat conducting plates, respectively, and in communication with the plurality of supply pipes and the plurality of cooling tubes, and supplied from each of the plurality of supply pipes. It may include a cooling tube distribution header for uniformly distributing the refrigerant to the plurality of cooling tubes.

The refrigerant distributor may include a distributor connected to the expander-distributor connecting pipe, an inlet part through which the refrigerant is introduced, a pipe extending from the inlet part, and a plurality of supply pipes annularly connected along an edge. Can be.

The cooling tube distribution header may include a refrigerant supply part connected to the plurality of supply pipes, a connection part extending in a straight direction in communication with the refrigerant supply part, and connected to the plurality of cooling tubes.

In addition, the connecting portion has a cross-sectional shape of a rectangular parallelepiped, a coupling portion connected to the plurality of cooling tubes, a semicircular cross-sectional shape, and an inner space in which the coolant is accommodated, and the coolant is formed in the inner space. It may include a mixing unit for at least two homogeneous mixing.

The mixing unit may include a header main body having an inner space in which the refrigerant is accommodated, and a plurality of supply pipes communicating with the plurality of supply pipes, and being inserted into the inner space of the header main body, and firstly expanded while the refrigerant is discharged to the outside. A first inner tube having an expansion hole formed therein, and inserted into an inner space of the header body to surround the first inner tube to receive the first expanded refrigerant from the first inner tube, and to the inner space of the header body; The first expanded refrigerant may include a second inner tube having a second expansion hole is formed to be second expansion as the discharge.

In addition, the first expansion hole may communicate with the coupling part side, and the second expansion hole may communicate with a direction opposite to the communication direction of the first expansion hole.

In addition, the refrigerant receiving volume occupied by the space between the second inner tube and the first inner tube is larger than the refrigerant containing volume of the first inner tube, and the space between the second inner tube and the first inner tube is The refrigerant accommodating volume occupied by the space between the inner space and the second inner tube may be set larger than the refrigerant accommodating volume.

In addition, the connecting portion has a cross-sectional shape of a rectangular parallelepiped, a coupling portion connected to the plurality of cooling tubes, a cross-sectional shape of a semi-circumference, and an inner space in which the refrigerant is accommodated, and each of the plurality of cooling tubes is formed. It may include a multi-flow path portion formed with a multi-flow path to supply the refrigerant to each.

In addition, the multi-channel flow passage, the flow path is disposed in the longitudinal direction in the longitudinal direction of the connecting portion in the inner space so as to partition the inner space into a coupling portion side space to which the plurality of cooling tubes are coupled and the coupling portion side space. May comprise a separating plate.

In addition, the distal end of the flow path separating plate is disposed to be spaced apart from the inner wall surface of the inner space corresponding to the distal end of the connection part by a predetermined distance, and the coupling part side space and the connection part side of the inner space are disposed at the distal end of the flow path separating plate. A plurality of through-holes communicating with each other may be formed to be spaced apart a predetermined distance in the longitudinal direction of the connecting portion.

The flow path separating plate may include a first flow path through which the refrigerant introduced into the space at the coupling part from the refrigerant supply part to the portion where the plurality of through holes is formed is mixed and flows into at least one of the plurality of refrigerant tubes, and the connection part space. After the refrigerant flows through the plurality of through-holes through the coupling side space, the second flow path is mixed and flows into at least another one of the plurality of refrigerant tubes, and the refrigerant flowing into the connection side space is the flow path separating plate A third flow passage may be formed between the outer side of the front end and the inner wall surface of the inner space corresponding to the front end of the connection part, passing through the coupling side space, and then mixing and flowing to the rest of the plurality of refrigerant tubes.

In addition, the multi-channel portion is arranged in the longitudinal direction in the longitudinal direction of the connecting portion in the inner space so as to divide the inner space into a plurality of space in the coupling portion side and the coupling portion side opposite to the coupling portion side space coupled to the plurality of cooling tubes. It may include a plurality of flow path separation plate.

In addition, one end of each of the plurality of flow path separation plates may be connected to the refrigerant supply unit, and a length between the one end and the other end may be different from each other.

In addition, when the plurality of flow path separation plate is provided with a length between the one end and the other end gradually longer from the first plate to the third plate and spaced apart from the space on the coupling side to which the plurality of refrigerant tubes are coupled, Of the plurality of refrigerant tubes flows from the refrigerant supply portion between the front end of the first plate toward the at least one of the plurality of refrigerant tubes and between the front end of the first plate and the end of the second plate A second flow passage which is mixed and flows toward at least another one, a third flow passage which is mixed and flows toward another one of the plurality of refrigerant tubes between a tip of the second plate and a tip of the third plate, and the third plate The inner hole corresponding to the distal end of the connecting portion from the distal end of A third flow path may be formed between the inner wall surface of the liver to be mixed and flow toward the rest of the plurality of refrigerant tubes.

The discharge piping module may include a refrigerant collector provided as a manifold to collect refrigerant from the plurality of heat conductive plates and deliver the refrigerant to the refrigerant circulation unit, and disposed in the plurality of heat conductive plates, respectively, to communicate with the plurality of cooling tubes. It may include a plurality of cooling tube collecting header for collecting the refrigerant heat exchanged from the heat conduction plate, and a plurality of refrigerant discharge pipe connecting the plurality of cooling tube collecting header and the refrigerant collector.

According to a preferred embodiment of the battery heat exchanger of the electric vehicle according to the present invention can achieve various effects as follows.

First, since the provision and installation of the coolant circuit and the coolant circuit for flowing the coolant that are exchanged with the refrigerant are unnecessary, the overall weight of the electric vehicle is reduced and the additional space of the predetermined battery pack module is secured to secure the additional volume of the battery. Can improve the performance.

Second, by simplifying the layout design of the complex water refrigerant heat exchanger and various coolant flow pipes, unnecessary assembly labor can be reduced to improve labor costs.

1 is a refrigerant circulation circuit diagram showing an embodiment of a battery heat exchange device of an electric vehicle according to the present invention,

2 is a perspective view showing a preferred embodiment of a battery heat exchanger of an electric vehicle according to the present invention;

3 is a perspective view illustrating a battery heat exchange unit in the configuration of FIG. 2;

4 is a perspective view showing a heat conduction plate of the configuration of FIG.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a perspective view illustrating an example of a refrigerant distributor in the configuration of FIG. 3;

7 is a perspective view showing an embodiment of the cooling tube distribution header of the configuration of Figure 4,

8 is a cross-sectional view taken along the line B-B of FIG.

9 is a perspective view showing another embodiment of the cooling tube distribution header of the configuration of Figure 4,

10 is a cross-sectional view taken along the line C-C of FIG.

FIG. 11 is a perspective view illustrating a refrigerant collecting part of the configuration of FIG. 4;

FIG. 12 is a perspective view illustrating a refrigerant collector of the configuration of FIG. 11.

Hereinafter, an embodiment of a battery heat exchanger of an electric vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a refrigerant circulation circuit diagram showing an embodiment of a battery heat exchange device of an electric vehicle according to the present invention.

Embodiment of the battery heat exchanger of the electric vehicle according to the present invention, as shown in Figure 1, the refrigerant circulating unit 10 to 40 configured to circulate the refrigerant while configuring the refrigeration cycle, and the refrigerant circulating unit (10 to 40) ) Includes a battery heat exchange unit 400 receiving the expanded refrigerant through an expander to cool the battery pack module 200 and discharge the refrigerant to the refrigerant circulation parts 10 to 40.

Here, the refrigerant circulation units 10 to 40 include a compressor 10 for compressing the refrigerant, a condenser 20 for condensing the refrigerant compressed by the compressor 10, and a refrigerant condensed by the condenser 20. An expander 40 for expanding and an evaporator 40 for evaporating the refrigerant expanded by the expander 40, the plurality of refrigerants being circulated through the compressor 10-condenser 20-expander-evaporator 40. The circuit is connected via refrigerant circulation piping.

The plurality of refrigerant circulation pipes may include a compressor-condenser connecting pipe (hereinafter, referred to as a “first pipe”) 15 connecting the compressor 10 and the condenser 20, and a condenser connecting the condenser 20 and the expander. -Expander connection pipe (hereinafter referred to as 'second pipe') (25, 27, 28), and expander-evaporator connection pipe (hereinafter referred to as 'third pipe') connecting the inflator and the evaporator 40 ( Reference numeral not shown), and the evaporator-compressor connecting pipe (hereinafter referred to as 'fourth pipe') 35A and 35 connecting the evaporator 40 and the compressor 10 may be included.

The

second pipes

25, 27, and 28 are refrigerants branched from the middle into the first branch pipes 27 and the second branch pipes 28 and condensed. The first expander provided on the vehicle air conditioner (not shown) side. 30A or the second expander 30B provided at the battery pack module 200 side.

Preferably, the first expander 30A is constituted by a thermal expansion valve (TVX), and the second expander 30B is preferably constituted by an electric expansion valve (EV).

The second piping (25, 27, 28) is provided with a three-way valve (not shown) for controlling the supply of the refrigerant to any one of the first branch pipe 27 and the second branch pipe 28, the three-way valve, When indoor air conditioning is required inside the vehicle, the refrigerant is supplied to the first expander 30A through the first branch pipe 27 to control the refrigerant flow to perform the indoor cooling air conditioning mode through the evaporator 40. When cooling of the battery pack module 200 is required, the refrigerant is supplied to the second expander 30B through the second branch pipe 28 to cool the battery pack module 200 through the battery heat exchange unit 400. Control the refrigerant flow to perform mode.

Conventionally, a separate coolant circulation circuit (not shown) is configured to cool the battery pack module 200 using the coolant, and heat exchange between the refrigerant expanded through the second expander 30B and the coolant in the coolant circulation circuit is performed. Although a water refrigerant heat exchanger (not shown) is provided for the present invention, in the embodiment according to the present invention, the refrigerant expanded by the second expander 30B is immediately provided without a separate water refrigerant heat exchanger. It is configured to ensure more efficient battery cooling performance by supplying directly to the.

Meanwhile, the refrigerant circulation units 10 to 40 may further include a radiator 710 for absorbing heat from the condenser 20 and a cooling fan 720 and an ePT unit 730 that are operated to cool the radiator 710. have.

2 is a perspective view showing a preferred embodiment of the battery heat exchanger of the electric vehicle according to the present invention, Figure 3 is a perspective view showing a battery heat exchange unit of the configuration of Figure 2, Figure 4 is a heat conduction plate ( 410 is a perspective view, and FIG. 5 is a cross-sectional view taken along line AA of FIG. 4.

As illustrated in FIGS. 2 and 3, the battery heat exchange unit 400 includes a plurality of heat conductive plates 410 arranged in thermal contact with a plurality of cells (not shown) constituting the battery pack module 200. And a plurality of cooling tubes 420 arranged in close contact with the heat conductive plate 410, and a plurality of heating plates disposed in close contact with one surface of the heat conductive plate 410 between the plurality of cooling tubes 420. 430 may be included.

The battery pack module 200 is modularized so that a plurality of battery cells (hereinafter, referred to as 'cells') are collectively installed to generate a high current, and the plurality of heat conducting plates as shown in FIGS. 2 and 3. It may be provided to be seated on the upper surface of the 410, respectively.

The plurality of heat conducting plates 410 may be made of a material having high heat transfer efficiency, and may be made of a material that is strong enough to support the weight of the plurality of cells of the battery pack module 200.

When the plurality of heat conduction plates 410 are formed in a rectangular shape, as shown in FIG. 4, the plurality of cooling tubes 420 may include one surface of the heat conduction plate 410 (in the embodiment of the present invention, a cooling tube 420 on the lower surface). ) Is coupled to be in close contact with the premise that is provided, it is disposed long in the longitudinal direction, and may be spaced apart in parallel to each other in a unidirectional direction.

The plurality of heating plates 430 may be arranged in parallel in the same direction as the cooling tube 420 between each of the plurality of cooling tubes 420.

The plurality of cooling tubes 420 may be integrally extruded to the bottom surface of the thermal conductive plate 410, as shown in FIG. 5. If the material of the cooling tube 420 and the heat conductive plate 410 is different, it may be manufactured by a double injection molding method, and if the material of the cooling tube 420 and the heat conductive plate 410 is the same, it is integrated by a general extrusion molding method. It is also possible to be produced with.

However, the plurality of cooling tubes 420 are not necessarily manufactured by an extrusion molding method, and the cooling tubes 420 may be coupled to the bottom surface of the heat conductive plate 410 by using a separate fastening device. Of course.

Meanwhile, the heating plate 430 may be a thin film heater that is bonded to a lower surface of the plurality of heat conductive plates 410 by a printing method.

However, the heating plate 430 is also not necessarily bonded in a printing manner, and although not shown in the drawing, a clamping part (not shown) for clamping the heating plate 430 is provided on the lower surface of the heat conductive plate 410. Naturally, the heating plate 430 may be clamped to the clamping part.

The heating plate 430 may be provided as an electrically driven hot wire heater, and the heat conduction plate 410 may heat the battery pack module 200 by dispersing the heat provided from the heating play 430 as a whole. .

An embodiment of the battery heat exchange device of the electric vehicle according to the present invention, the cooling tube 420 of the battery heat exchange unit 400 to cool the temperature of the battery pack module 200 due to the continuous operation of the battery pack module 200. The heating play 430 of the battery heat exchange unit 400 is used to heat the battery pack module 200 in cold weather.

The heat conduction plate 410 having such a configuration is preferably formed to correspond to the contact surface shape of the plurality of cells to be contacted.

Meanwhile, as illustrated in FIG. 2, the battery heat exchange unit 400 receives a refrigerant from the second expander 30B and distributes the plurality of

distribution piping modules

450 and 455 to supply the plurality of heat conducting plates 410. The discharge pipe module 460 may further include a discharge pipe module 460 which collects the refrigerant from the two heat conductive plates 410 and discharges the refrigerant to the refrigerant circulation parts 10 to 40.

In addition, the battery heat exchange unit 400 may further include a refrigerant distributor 405 that uniformly distributes the refrigerant supplied from the second expander 30B to the plurality of heat conductive plates 410.

6 is a perspective view showing an example of the refrigerant distributor 405 of the configuration of Figure 3, Figure 7 is a perspective view showing an embodiment of the cooling tube distribution header of the configuration of Figure 4, Figure 8 is a line BB of Figure 7 9 is a perspective view illustrating another embodiment of the cooling tube distribution header of FIG. 4, FIG. 10 is a cross-sectional view taken along line CC of FIG. 9, and FIG. 11 is a discharge pipe of the configuration of FIG. 4. 12 is a perspective view of the module, and FIG. 12 is a perspective view of the refrigerant collector 470 in the configuration of FIG. 11.

Here, the

distribution piping modules

450 and 455 may include an expander-distributor connection pipe 451 connecting the second expander 30B and the refrigerant distributor 405 and the refrigerant distributor 405 as shown in FIGS. 2 and 3. A plurality of supply pipes 453 and a plurality of supply pipes 453 respectively connected to the plurality of heat conductive plates 410, and are connected to the plurality of supply pipes 453 and the plurality of cooling tubes 420, respectively. It may include a cooling tube distribution header 455 that uniformly distributes the refrigerant supplied from the 453 to the plurality of cooling tubes (420).

The refrigerant expanded through the second expander 30B flows to the refrigerant distributor 405 through the expander-distributor connection pipe 451, and the refrigerant distributor 405 is uniform in each of the plurality of

supply pipes

453, 453A to 453E. The refrigerant is uniformly distributed, and the refrigerant that is uniformly distributed to the plurality of supply pipes 453 and flows to the cooling

tube distribution headers

455, 455A to 455E provided in the plurality of

heat conducting plates

410, 410A to 410E, respectively. The plurality of cooling tube distribution headers 455 are uniformly distributed to the plurality of cooling tubes 420.

As shown in FIG. 6, the refrigerant distributor 405 is connected with an expander-distributor connecting pipe 451, and extends such that the refrigerant flows from the inlet 406 and the inlet 406. In addition, the plurality of supply pipes 453 may include a distribution unit 407 connected in an annular manner along the rim.

In the distribution part 407, a plurality of pipe connecting holes 408 to which one end of the plurality of supply pipes 453 are connected are formed in an annular shape along an edge.

Meanwhile, as shown in FIG. 4, the cooling tube distribution header 455 extends in a straight line in communication with the refrigerant supply unit 456 to which the other ends of the plurality of supply pipes are connected, and the refrigerant supply unit 456.

Connections

457A, 457B to two cooling tubes 420.

Here, the connecting

portions

457A and 457B may be provided in a double tube shape, as shown in FIGS. 7 and 8, and of course, may be provided in a multi-channel shape as described in FIGS. 9 and 10. .

Hereinafter, an embodiment provided in a double pipe shape will be referred to as connecting

portions

457A and 457B according to the first embodiment, and an embodiment provided in a multi-channel shape will be referred to as connecting

portions

457A and 457B according to the second embodiment. do.

The connecting

portions

457A and 457B according to the first embodiment have a cross-sectional shape of a rectangular parallelepiped, as shown in FIGS. 7 and 8, a coupling portion 457B connected to the plurality of cooling tubes 420, and a semicircle. It has a cross-sectional shape of, and integrally extended with the coupling portion 457B, the inner space is formed to accommodate the refrigerant, may include a mixing unit 457A for homogeneously mixing the refrigerant at least twice in the inner space.

As shown in FIG. 7, the mixing part 457A communicates with a header main body (not shown) having an internal space in which a refrigerant is accommodated, and a plurality of supply pipes 453 and is inserted into the internal space of the header main body. The first inner tube 459A having the first expansion hole 459B is formed to be first expanded while the refrigerant is discharged to the outside, and the first inner tube 459A is inserted into the inner space of the header body to surround the first inner tube 459A. A second inner tube 458A having a second expansion hole 458B formed to receive the first expanded refrigerant from the tube 459A, and to expand secondly as the primary expanded refrigerant is discharged into the inner space of the header body; can do.

The first inner tube 459A is preferably formed to be sized to be inserted into the second inner tube 458A, and the second inner tube 458A is sized to be inserted into the inner space of the header body. It is preferable to form.

The first expansion hole 459B is formed to be in communication with the opposite side of the

connection portions

457A and 457B, that is, toward the refrigerant supply portion 456, and the second expansion hole 458B is opposite the refrigerant supply portion 456, that is, the connection portion ( 457A and 457B).

Here, in the process of supplying the refrigerant expanded by the second expander 30B, the mixing unit 457A uniformly mixes a supply refrigerant consisting of a liquid refrigerant and an air refrigerant, and a plurality of cooling tubes 420. By supplying a homogeneous refrigerant to the ()) serves to ensure that the thermal conductive plate 410 has a uniform cooling performance as a whole.

More specifically, the two-phase refrigerant introduced through the first inner tube 459A has an inner circumference of the second inner tube 458A and an outer circumference of the first inner tube 459A through the first expansion hole 459B. Primary expansion and homogeneous mixing by the operation to be discharged into the space to be formed, and discharged to the space formed by the inner surface of the header body and the outer periphery of the second inner tube 458A through the second expansion hole (458B) It is expanded secondarily and mixed homogeneously.

Here, as shown in FIG. 8, the first inner tube 459A is preferably disposed eccentrically toward the refrigerant supply unit 456 in the inner space of the second inner tube 458A, and the second inner tube 458A. Is eccentrically disposed on the opposite side of the refrigerant supply unit 456, that is, the

connection portions

457A and 457B, in the inner space of the header body.

In addition, it is preferable that the refrigerant containing volume occupied by the space between the second inner tube 458A and the first inner tube 459A is larger than the refrigerant containing volume of the first inner tube 459A. Preferably, the refrigerant containing volume occupied by the space between the inner space of the header body and the second inner tube 458A is set larger than the refrigerant containing volume occupied by the space between the tube 458A and the first inner tube 459A. .

This is intended to actively reflect the principle of expansion of the refrigerant, and reflects the principle that the two-phase refrigerant mixture is made faster by changing the phase of the refrigerant into a refrigerant as the liquid refrigerant expands from a narrow space to a wide space.

The connecting

portions

457A and 457B according to the second embodiment have a cross-sectional shape of a rectangular parallelepiped, as shown in FIGS. 9 and 10, a coupling portion 457B connected to the plurality of cooling tubes 420, and a semicircle.

Multi-flow path portion

555 and 655 having a cross-sectional shape, extending from the coupling portion 457B, an inner space for accommodating a coolant therein, and a multi-flow path formed to supply a coolant to each of the plurality of cooling tubes 420. ).

Although the mixing portions 457A of the connecting

portions

457A and 457B according to the first embodiment and the

multi-channel portions

555 and 655 of the connecting

portions

457A and 457B according to the second embodiment may have the same appearance, Each configuration provided in the inner space accommodated is different.

9 and 10, the plurality of passages 559 are inserted in the longitudinal direction in the inner space and communicated to the header body side at the connecting

portions

457A and 457B, as referred to the angles (a) of FIGS. 9 and 10. And a flow path separation plate 558 formed therein, and as shown in FIGS. 9 and 10 (b), each having a different length and having a plurality of flow path separation plates inserted in the longitudinal direction in the inner space ( 657,658,659).

Hereinafter, the flow path separation plate 558 on which the plurality of through holes 559 are formed will be referred to as a 'first flow path separation plate 558', and the flow

path separation plates

657, 658 and 659 each having different lengths will be referred to as 'second flow path separation plates (' 657,658,659 '', in particular, the second flow path separating plates 657,658,659 are arranged in the order of the first plate 657, the second plate 658, and the third plate 659 in order from the shortest to the longest for each plate. I'll name it.

More specifically, as shown in each of (a) of FIGS. 9 and 10, the multi-channel portion has

coupling spaces

457A and 457B opposed to the coupling portion side and the coupling portion side to which the plurality of cooling tubes are coupled. The first flow path separation plate 558 described above may be disposed in the longitudinal direction of the connecting

portions

457A and 457B in the inner space so as to partition into the side space.

Here, the front end of the first flow path separation plate 558 is disposed to be spaced apart from the inner wall surface of the inner space corresponding to the front ends of the

connection parts

457A and 457B by a predetermined distance, and the front end of the first flow path separation plate 558 is internal. A plurality of through holes 559 may be formed to be spaced apart by a predetermined distance in the longitudinal direction of the connecting

parts

457A and 457B from the space between the coupling part side and the connecting

parts

457A and 457B.

9 and 10 (b), the inner space is a space on the side of the

connection portion

457A and 457B opposed to the space on the coupling portion and the space on the coupling portion to which the plurality of cooling tubes are coupled. A plurality of second flow

path separation plates

657, 658, and 659 may be disposed in the interior space in the lengthwise direction of the connecting

parts

457A and 457B in a plurality of compartments.

Here, the second flow

path separation plates

657, 658, 659, one end is connected to the refrigerant supply unit 456, respectively, the length between one end and the other end may be provided differently.

9 and 10, the refrigerant supply process of the multi-path part as described with reference to (a) is as follows.

For convenience of description, the space including the coupling part side among the spaces divided by the flow path separating plate 558 inserted into the interior spaces of the

connection parts

457A and 457B is referred to as the 'compartment side space', and the opposite space It will be described by defining the 'space of the connecting portions (457A, 457B)'.

When the refrigerant flows into the connecting

portions

457A and 457B from the refrigerant supply unit 456, the refrigerant introduced into the space of the coupling portion of the portion where the plurality of through holes 559 are formed at the beginning of the connecting

portions

457A and 457B is directly coupled to the coupling portion ( A portion of the plurality of cooling tubes 420 connected to the 457B (first flow path), and at the beginning of the connecting

portions

457A and 457B to the space on the side of the connecting

portions

457A and 457B in which the plurality of through holes 559 are formed. Some of the introduced refrigerant passes through the plurality of through holes 559 and is partially distributed to the cooling tube 420 coupled around the plurality of through holes 559 of the plurality of cooling tubes 420 via the space at the coupling part side. (Second flow path), the remaining refrigerant flows from the end of the flow path separation plate 558 to the joint side space and is uniformly distributed to the remaining cooling tube 420 (third flow path).

9 and 10 (b), the refrigerant supply process of the multi flow path unit will be described below.

The first plate 657 is inserted and installed to be close to the coupling part side in the inner space of the connecting

portions

457A and 457B, and the second plate 658 is inserted and installed in the middle of the inner space of the connecting

portions

457A and 457B. The three plates 659 are installed far from the

coupling part

457A, 457B coupling side in the inner space of the

connection part

457A, 457B.

When the refrigerant flows into the

connection portions

457A and 457B from the refrigerant supply portion 456, the refrigerant introduced between the coupling portion 457B and the first plate 657 is partially distributed and supplied to the cooling tube 420 therein ( The first flow path, the refrigerant introduced between the first plate 657 and the second plate 658 is provided between the end (tip) of the second plate 658 at the end (tip) of the first plate 657. A portion is distributed and supplied to the cooling tube 420 (second flow path), and the refrigerant introduced between the second plate 658 and the third plate 659 is transferred to the third plate at the end (front end) of the second plate 658. Part of the cooling tube 420 provided between the ends (tip) of the 659 is distributed and supplied (the third flow path), and the refrigerant introduced between the third plate 659 and the remaining spaces of the connecting

portions

457A and 457B The remainder is distributedly supplied to the cooling tube 420 provided between the end portion (tip) of the third plate 659 and the inner surface of the inner spaces of the connecting

portions

457A and 457B (fourth flow path).

As such, the refrigerant flowing into the connecting

portions

457A and 457B may be uniformly distributed and supplied to the cooling tube 420 while forming the multi-path by the

multi-channel portions

555 and 655 as referred to in FIGS. 9 and 10. .

The refrigerant uniformly distributed into the plurality of cooling tubes 420 is heat-exchanged with the battery pack module 200 to have a uniform cooling performance in the entire heat conduction plate 410, and then the discharge piping module of the battery heat exchange unit 400. The refrigerant is discharged back to the refrigerant circulation parts 10 to 40 through 460.

More specifically, the discharge piping module 460, as shown in Figure 11, and the refrigerant collector 470 to collect the refrigerant from the plurality of heat conductive plate 410 and to deliver to the refrigerant circulation section (10-40) A plurality of cooling tube collecting headers 460 disposed on the plurality of heat conducting plates 410 and arranged in communication with the plurality of cooling tubes 420 to collect the heat exchanged refrigerant, and a plurality of cooling tube collecting headers 460. ) And a plurality of refrigerant discharge pipes 466, 463A to 463E connecting the refrigerant collector 470 and the collector-refrigerant circulation connection pipe 35B connecting the refrigerant collector 470 and the refrigerant circulation parts 10 to 40. It may include.

The cooling tube collecting header 460 is disposed at the other end of the end of the heat conductive plate 410 such that the cooling tube distribution header 455 described above is disposed at one end of the rectangular heat conductive plate 410.

While the cooling tube distribution header 455 is configured to homogeneously distribute the refrigerant by dividing the refrigerant supply unit 456 and the

connection units

457A and 457B, the cooling tube collecting header 460 does not require a separate configuration, The connection with the tube 420 is sufficient.

As shown in FIG. 12, the refrigerant collector 470 may be provided as a manifold having a plurality of connectors 471A to 471E to which a plurality of refrigerant discharge pipes 466, 463A to 463E are connected.

When briefly described the cooling and heating process of the battery pack module 200 according to the battery heat exchange device of the electric vehicle according to the present invention configured as described above.

When the battery pack module 200 needs to be cooled, the second condenser 30B is provided by controlling the three-way valve of the refrigerant condensed by the condenser 20 among the refrigerant flowing through the refrigerant circulation units 10 to 40. It flows to the 2nd branch pipe 28 side.

The refrigerant expanded by the second expander 30B is uniformly supplied to the heat conduction plate 410 through the

distribution piping modules

450 and 455 to cool the battery pack module 200, and then again through the discharge piping module 460. Recovered to the circulation portion (10-40).

When heating of the battery pack module 200 is required, the heating play 430 coupled to the bottom surface of the heat conduction plate 410 is electrically operated to heat the battery pack module 200.

Embodiment of the battery heat exchange device of the electric vehicle according to the present invention, after supplying the refrigerant directly to the battery pack module 200 side from the refrigerant circulation unit 10 to 40 provided for the air conditioning of the vehicle, by using the refrigerant It is configured to directly cool the battery pack module 200 or to heat using the direct heat of the heating play 430 provided on the bottom surface of the heat conduction plate 410, in order to reduce the weight of the product, Simplification and installation of the additional battery pack module 200 has the advantage of improving battery performance.

Or more, with reference to the accompanying drawings, an embodiment of a battery heat exchanger of an electric vehicle according to the present invention was described in detail. However, the embodiments of the present invention are not necessarily limited to the above-described embodiments, and it is natural that various modifications and equivalents can be made by those skilled in the art to which the present invention pertains. will be. Therefore, the true scope of the present invention will be defined by the claims to be described later.

Claims

A refrigerant circulation unit configured to circulate the refrigerant while constituting the refrigeration cycle;

A battery heat exchange unit receiving the expanded refrigerant through the expander among the refrigerant circulation units to cool the battery pack module and discharge the battery pack module to the refrigerant circulation unit;

The battery heat exchange unit,

A plurality of heat conductive plates arranged in thermal contact with a plurality of cells constituting the battery pack module;

A plurality of cooling tubes arranged in a plurality of rows in close contact with one surface of the heat conductive plate;

And a plurality of heating plates disposed in close contact with one surface of the heat conduction plate corresponding to each of the plurality of cooling tubes.
The method according to claim 1,

The cooling tube is bonded to one surface of the plurality of heat conductive plates by a brazing (Brazing) bonding method, or a battery heat exchange apparatus of an electric vehicle that is integrally extrusion molded with the plurality of heat conductive plates.
The method according to claim 1,

The heating plate is bonded to one surface of the plurality of heat conductive plates by a printing method, or a battery heat exchange apparatus of an electric vehicle is clamped coupled to the clamping portion formed on one surface of the plurality of heat conductive plates.
The method according to claim 1,

The plurality of heat conductive plates,

Battery heat exchange apparatus for an electric vehicle formed to have an area corresponding to the contact surface shape of the plurality of cells in contact.
The method according to claim 1,

The battery heat exchange unit,

A distribution piping module which receives the refrigerant from the expander and distributes the refrigerant to the plurality of heat conductive plates;

And a discharge piping module configured to collect the refrigerant from the plurality of heat conductive plates and discharge the refrigerant to the refrigerant circulation unit.
The method according to claim 5,

The battery heat exchange unit further includes a refrigerant distributor that uniformly distributes the refrigerant supplied from the expander to the plurality of heat conductive plates.

The distribution piping module,

An expander-distributor connection pipe connecting the expander and the refrigerant distributor;

A plurality of supply pipes branched from the refrigerant distributor and connected to the plurality of heat conductive plates, respectively;

Battery heat exchange of an electric vehicle including a cooling tube distribution header disposed in communication with the plurality of supply pipes and the plurality of cooling tubes to uniformly distribute the refrigerant supplied from each of the plurality of supply pipes to the plurality of cooling tubes. Device.
The method according to claim 6,

The refrigerant distributor,

An inlet part to which the expander-distributor connection pipe is connected and into which the refrigerant is introduced;

A battery heat exchanger of an electric vehicle, which extends from the inlet and includes a distribution unit in which the plurality of supply pipes are annularly connected along an edge thereof.
The method according to claim 6,

The cooling tube distribution header,

A refrigerant supply unit connected to the plurality of supply pipes;

A battery heat exchanger of an electric vehicle including a connection part extending in a straight line in communication with the refrigerant supply part and connected to the plurality of cooling tubes.
The method according to claim 8,

The connecting portion,

A coupling portion having a cross sectional shape of a rectangular parallelepiped and connected to the plurality of cooling tubes;

A battery heat exchange apparatus for an electric vehicle having a cross-sectional shape of a semi-circumference, an internal space in which the refrigerant is accommodated, and a mixing unit configured to homogeneously mix the refrigerant at least twice in the internal space.
The method according to claim 9,

The mixing unit,

A header body having an internal space in which the refrigerant is accommodated;

A first inner tube communicating with the plurality of supply pipes and inserted into an inner space of the header body, and having a first expansion hole formed to expand first as the refrigerant is discharged to the outside;

It is inserted into the inner space of the header body to surround the first inner tube is supplied with the primary expanded refrigerant from the first inner tube, and the primary expanded refrigerant is discharged into the inner space of the header body 2 Battery heat exchange apparatus for an electric vehicle comprising a second inner tube is formed with a second expansion hole to be expanded.
The method according to claim 10,

And the first expansion hole communicates with the coupling part side, and the second expansion hole communicates in a direction opposite to the communication direction of the first expansion hole.
The method according to claim 10,

The refrigerant accommodating volume occupied by the space between the second inner tube and the first inner tube is larger than the refrigerant accommodating volume of the first inner tube,

The battery heat exchanger of an electric vehicle having a larger refrigerant accommodating volume occupied by the space between the inner space and the second inner tube than a refrigerant accommodating volume occupied by the space between the second inner tube and the first inner tube.
The method according to claim 8,

The connecting portion,

A coupling portion having a cross sectional shape of a rectangular parallelepiped and connected to the plurality of cooling tubes;

A battery heat exchange apparatus for an electric vehicle having a cross-sectional shape of a semi-circumference, an internal space in which the refrigerant is accommodated, and a multi-path portion formed to supply the refrigerant to each of the plurality of cooling tubes.
The method according to claim 13,

The multi flow path unit,

An electric vehicle including a flow path separating plate disposed in the lengthwise direction of the connecting portion in the inner space so as to partition the inner space into a coupling part side space to which the plurality of cooling tubes are coupled and a coupling part side space opposite to the coupling part side space. Battery heat exchanger.
The method according to claim 14,

The front end of the flow path separating plate is disposed to be spaced apart from the inner wall surface of the inner space corresponding to the front end of the connection part by a predetermined distance.

The battery heat exchange apparatus of the electric vehicle is formed in the front end portion of the flow path separating plate is formed a plurality of through-holes for communicating the space between the coupling portion side and the connection portion side of the inner space in the longitudinal direction of the connecting portion.
The method according to claim 15,

The flow path separating plate,

A first passage through which the refrigerant introduced into the space at the coupling part from the refrigerant supply part to the portion where the plurality of through holes are formed is mixed and flows into at least one of the plurality of refrigerant tubes;

A second passage through which the refrigerant introduced into the connection side space passes through the plurality of through holes and passes through the coupling side space and is mixed and flows into at least another one of the plurality of refrigerant tubes;

The refrigerant introduced into the connection side space passes between the outer end of the flow path separating plate and the inner wall surface of the inner space corresponding to the front end of the connection portion, passes through the coupling side space, and mixes the rest of the plurality of refrigerant tubes. Flowing the third flow path,

Forming battery heat exchanger for electric vehicles.
The method according to claim 13,

The multi flow path unit,

A plurality of flow path separating plates disposed in the lengthwise direction of the connection part in the inner space to divide the inner space into a plurality of spaces in the coupling part side to which the plurality of cooling tubes are coupled and in the coupling part side space opposite the coupling part side space; Battery heat exchanger of an electric vehicle comprising.
The method according to claim 17,

One end of each of the plurality of flow path separating plates is connected to the refrigerant supply unit, and a battery heat exchange apparatus of an electric vehicle having different lengths between the one end and the other end.
The method according to claim 18,

When the plurality of flow path separation plates are provided with a length between the one end and the other end gradually longer from the first plate to the third plate and spaced apart from the space at the coupling side to which the plurality of refrigerant tubes are coupled,

A first flow passage which is mixed and flows toward at least one of the plurality of refrigerant tubes between the refrigerant supply unit and the front end of the first plate;

A second flow passage that is mixed and flows toward at least another one of the plurality of refrigerant tubes between the tip of the first plate and the tip of the second plate;

A third flow passage that is mixed and flows from one end of the second plate to another one of the plurality of refrigerant tubes between the ends of the third plate;

A third flow passage which is mixed and flows toward the remainder of the plurality of refrigerant tubes between the inner wall surface of the inner space corresponding to the distal end of the third plate from the distal end of the third plate,

Battery heat exchanger of the electric vehicle to form a.
The method according to claim 5,

The discharge piping module may include a refrigerant collector provided as a manifold to collect refrigerant from the plurality of heat conductive plates and transfer the refrigerant to the refrigerant circulation unit;

A plurality of cooling tube collecting headers disposed on the plurality of heat conducting plates, respectively, in communication with the plurality of cooling tubes to collect refrigerant exchanged from the heat conducting plate;

And a plurality of refrigerant discharge pipes connecting the plurality of cooling tube collecting headers and the refrigerant collecting device.