KR20200098841A - Water-cooled battery pack cooling device to reduce working fluid flow resistance - Google Patents

Abstract

The present invention relates to a water-cooled battery pack cooling device to reduce the flow resistance of a working fluid, which can improve cooling efficiency of a battery by reducing the flow resistance of the working fluid. To this end, the present invention comprises: a main tray, a plurality of separation panels, a lower plate, a working fluid inlet port, a working fluid outlet port, and a gasket.

Description

Water-cooled battery pack cooling device to reduce working fluid flow resistance

The present invention relates to a water-cooled battery pack cooling device for reducing the flow resistance of a working fluid. In more detail, when the main tray is integrally manufactured so that the battery pack can be mounted on the upper side and the lower plate is coupled to the lower side of the main tray, the manufacturing process is simplified by using fastening means including bolts and screws. Water-cooled battery pack cooling to reduce the flow resistance of the working fluid that can improve the cooling efficiency of the battery by forming a flow path through which the working fluid can flow inside the cooling device as a multi-channel, and reducing the flow resistance of the working fluid. It relates to the device.

In general, a secondary battery is a battery capable of charging and discharging. In the case of a battery for driving a motor of an electric vehicle, a large-capacity secondary battery is formed by connecting a plurality of battery cells in series or in parallel.

In a battery pack in which a plurality of modules are connected in series, heat is generated in a cell during charging/discharging, and charging/discharging power of the battery varies according to the temperature of the cell. Therefore, the temperature of the cell must be maintained within an appropriate range so that the internal temperature of the battery is operated, for example, 25 to 40 degrees.

The currently used electric vehicle battery cooling method can be largely divided into an air-cooled type and a water-cooled type, and the air-cooled and water-cooled cooling methods are generally performed in units of battery modules.

In the air-cooled cooling method, a cooling fan is attached to the battery tray, and air is sucked from the outside to cool from the inlet side of the battery tray, and air is exhausted to the rear outlet of the battery tray. However, the cooling performance of the battery may differ in cooling characteristics depending on the location of the battery as the air heated at the inlet end is transferred to the rear. In particular, it can be seen that the cooling efficiency of the battery located at the rear rather than the front is lowered. There is a disadvantage of slow cooling rate.

In addition, a water-cooled cooling method in which cooling water is introduced into a water cooling plate to cool the battery pack is mainly used for a battery module that generates relatively much heat.

However, the conventional water-cooled cooling device cools the battery module by inserting a cooling pipe directly into a heat sink or battery pack under the battery module, not the battery pack case, but this method is composed of separate parts to increase the number of parts. And the manufacturing process is complicated, the risk of secondary accidents including the occurrence of fire due to leakage is high, and the mileage of the electric vehicle is reduced due to weight problems.

In addition, when the working fluid flows while exchanging heat in the water-cooled cooling device, there arises a problem in that the cooling efficiency decreases due to an increase in flow resistance in a portion where the flow direction of the working fluid changes.

In addition, when the battery cooling device is combined with the laser welding method, when the pressure of the internal working fluid is increased, stomach swelling and leakage may occur, and when combined by the lobe lazing method, soft nitriding occurs. The problem of lowering the durability of the product occurs.

Therefore, by integrating the water-cooled cooling channel with the battery pack case, cooling efficiency can be improved, the manufacturing process can be simplified, and a new battery cooling device capable of increasing the mileage of the electric vehicle by reducing the weight of the cooling device is required. Actually.

Prior art literature: KR Patent Publication No. 10-1091665 (2011.12.08. Announcement)

The present invention was conceived to solve the above problems, and the present invention relates to a water-cooled battery pack cooling apparatus for reducing the flow resistance of a working fluid. More specifically, the manufacturing process can be simplified by using fastening means including bolts and screws when the main tray is integrally manufactured so that the battery pack can be mounted on the upper side and the lower plate is coupled to the lower side of the main tray. A water-cooled battery pack cooling device for reducing the flow resistance of the working fluid that can improve the cooling efficiency of the battery by forming a flow path through which the working fluid can flow inside the cooling device as a multi-channel, and reducing the flow resistance of the working fluid. Its purpose is to provide.

In order to achieve the above object, the water-cooled battery pack cooling device for reducing the flow resistance of the working fluid according to the present invention has a main frame part formed by protruding in an embossed shape along the outer edge of the lower surface, and one side is connected to the main frame part in the center part. The other side is a main central separation unit formed in an embossed shape by a predetermined distance from the main border, a plurality of main inflow passage separation units formed in an embossed shape at a predetermined distance apart from the main central separation unit. A plurality of main outlet flow path separators formed in an embossed shape with a predetermined interval on the other side of the main inflow path separator based on the separation part, a plurality of port through holes formed at predetermined intervals between the main central separator, and the top surface A main tray including a separation panel coupling portion spaced at a predetermined interval and formed in an intaglio inside; A plurality of separation panels coupled to the separation panel coupling portion of the main tray so that a plurality of battery packs can be mounted side by side and detachable; On the outer side of the upper surface, a lower border portion protruding along the edge at a position corresponding to the main frame portion of the main tray, a lower central portion protruding from a position corresponding to the main central portion of the main tray, and the main tray A lower plate including a lower inflow channel separation unit protruding at a position corresponding to the inflow channel separation unit, and a lower outflow channel separation unit protruding at a position corresponding to the main outflow channel separation unit of the main tray; A working fluid inlet port into which the working fluid is introduced and inserted into the port through hole on one side of the main tray; A working fluid outlet port that is inserted into the other port through hole based on the main central separation part of the main tray, and through which the working fluid flows out; And a gasket provided between the lower side of the main tray and the upper side of the lower plate when the lower side of the main tray and the lower plate are coupled to each other in order to prevent leakage of the working fluid and maintain the airtight state of the flow path, and the main tray When the lower side and the lower plate of the unit are coupled to each other, the main frame and the lower frame are in close contact with each other to form a rim, the main central separation unit and the lower central separation unit are in close contact with each other to form a central separation unit, and the main inflow channel separation unit and The lower inflow path separator is in close contact with each other to form a plurality of inflow path separators, and the inflow path is formed by the multiple inflow path separators, and the main outflow path separator and the lower outflow path separator are in close contact with each other to separate multiple outflow paths. It includes forming a part, and forming an outflow channel by a plurality of outflow channel separation units, so that the working fluid flowing in from the working fluid inlet port flows along the inlet channel and the outflow channel and discharged to the working fluid outlet port. The main central separation part, the main inflow passage part and the main outflow passage part and the lower central part of the lower plate, the lower inflow passage part and the lower outflow passage part are provided with through holes for coupling by fastening means including bolts or screws. It is formed, and when the lower side of the main tray and the lower plate are coupled to each other, a fastening means including a bolt or a screw is inserted into the through hole for coupling to be coupled.

In addition, in order to reduce the flow resistance of the working fluid when the working fluid flows from the inflow channel to the outflow channel, the length of the outflow channel separation unit becomes shorter as it goes outward from the central separation unit, thereby widening the width of the outflow channel introduction unit. can do.

In addition, in order to disperse the stress generated in the lower plate due to the flow pressure of the working fluid, it may include forming a polygonal relief protrusion continuously in a relief shape on the outer surface of the lower plate.

According to the present invention, since the battery pack and the cooling device can be integrated, the manufacturing process of the cooling device can be simplified, and by combining using a fastening means including screws or bolts, it is possible to prevent stomach upset and leakage.

In addition, it is possible to improve the cooling efficiency of the battery by forming a flow path through which the working fluid can flow into multiple channels and reducing the flow resistance of the working fluid.

1 is a perspective view showing an integrated water-cooled cooling device for cooling a battery pack according to a preferred embodiment of the present invention,
2 is an exploded perspective view of the main tray and the lower plate,
3 is a perspective view showing a main tray and a port;
4 is a view showing the lower side of the main tray;
5 is a view showing the lower side of the main tray and a gasket;
6 is a view showing a bonding state of the main tray and the lower plate;
7 is a view showing the inflow and outflow of the working fluid flowing along the flow path in the integrated water-cooled cooling device for cooling a battery pack according to a preferred embodiment of the present invention.
8 is a view showing a flow direction of a working fluid in an integrated water cooling type cooling device for cooling a battery pack according to a preferred embodiment of the present invention;
9 is a view showing the temperature distribution of the working fluid when the length of the outflow passage is the same.
10 is a view showing the temperature distribution of the working fluid when the length of the outflow passage is formed shorter toward the outside according to a preferred embodiment of the present invention;
11 is a view showing the upper side of the lower plate,
12 is an exploded perspective view of a main tray, a gasket and a lower plate;
13 is an exploded perspective view of a separation panel and a main tray,
14 is a view showing the lower side of the lower plate coupled to the main tray;
15 is a view showing the lower side of the main tray
16 is a view showing a cover case.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to elements of each drawing, it should be noted that the same elements have the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, a preferred embodiment of the present invention will be described below, but the technical idea of the present invention is not limited thereto or is not limited thereto, and may be modified and variously implemented by a person skilled in the art.

1 is a perspective view showing an integrated water-cooled cooling device for cooling a battery pack according to a preferred embodiment of the present invention, FIG. 2 is an exploded perspective view of a main tray and a lower plate, and FIG. 3 is a perspective view showing a main tray and a port. 4 is a view showing the lower side of the main tray, FIG. 5 is a view showing the lower side of the main tray and a gasket, FIG. 6 is a view showing the bonding state of the main tray and the lower plate, and FIG. 7 is a preferred embodiment of the present invention. In the integrated water-cooled cooling device for cooling the battery pack according to the embodiment, a view showing the inflow and outflow of the working fluid flowing along the flow path, and FIG. 8 is an integrated water-cooled cooling for cooling the battery pack according to a preferred embodiment of the present invention. A view showing the flow direction of the working fluid in the apparatus, FIG. 9 is a view showing the temperature distribution of the working fluid when the length of the outflow channel is the same, and FIG. 10 is a view showing the length of the outflow channel according to a preferred embodiment of the present invention. A diagram showing the temperature distribution of the working fluid when it is formed shorter as it becomes, FIG. 11 is a view showing the upper side of the lower plate, FIG. 12 is an exploded perspective view of the main tray, the gasket and the lower plate, and FIG. 13 is the separation panel and the main An exploded perspective view of the tray, FIG. 14 is a view showing the lower side of the lower plate coupled to the main tray, FIG. 15 is a view showing the lower side of the main tray, and FIG. 16 is a view showing a cover case.

A water-cooled battery pack cooling device for reducing the flow resistance of the working fluid according to a preferred embodiment of the present invention, referring to FIGS. 1 to 3, the main tray 10, the separation panel 20, the lower plate 30, the operation It comprises a fluid inlet port 40, a working fluid outlet port 50, a cover case 60, and a gasket 70.

First, the water-cooled battery pack cooling device for reducing the flow resistance of the working fluid according to the present invention is a water-cooled cooling device integrated with a battery for an electric vehicle, wherein a plurality of battery packs are mounted side by side on the upper side of the main tray 10, A part of the flow path through which the working fluid can flow is formed on the lower outer surface of the main tray 10, a part of the flow path is formed in the lower plate 30, and the main tray 10 and the lower plate 30 are mutually coupled. In this state, a complete flow path through which the working fluid can flow is formed, thereby simplifying the structure of the cooling device, thereby simplifying the manufacturing process and promoting economic efficiency.

In addition, by combining the main tray and the lower plate using a fastening means including bolts or screws, it is possible to prevent a stomach bloating phenomenon and improve durability.

In addition, the cooling channel is formed into multiple channels so that a large amount of working fluid can flow, while simplifying the flow direction of the working fluid to reduce frictional resistance and eddy currents along the curved surface, and increase the flow rate of the working fluid to increase cooling efficiency. There is a characteristic that can be improved.

Hereinafter, components constituting the water-cooled battery pack cooling apparatus for reducing the flow resistance of the working fluid according to a preferred embodiment of the present invention will be described in detail.

1 to 3 and 13, the main tray 10 is provided with a plurality of separation panel coupling portions 17 spaced apart from each other in the longitudinal direction so that a plurality of battery packs can be mounted side by side on the upper side. , The separation panel 20 may be coupled to the separation panel coupling portion 17, and when the separation panel 20 is coupled to the separation panel coupling portion 17, the battery pack is inserted and seated between the separation panels 20. .

When the separation panel is provided integrally with the main tray, a vortex phenomenon of the molten ingot may occur due to the separation panel portion during casting production.

When such a vortex phenomenon of the molten ingot occurs, porous pores are generated inside the main tray due to the vortex, thereby reducing the durability of the main tray and causing product defects.

In the present invention, in order to solve this problem, the main tray 10 is manufactured in a state in which the separation panel coupling part 17 is formed, and the separation panel 20 is manufactured separately from the main tray 10 so that the separation panel coupling part of the main tray The durability and productivity of the product were improved by adopting a method of assembling and bonding using fastening means including bolts and screws in (17).

In addition, in order to improve the rapid cooling structure by cooling in the thin plate and to improve the mechanical properties, the ingot may be manufactured by adding a phosphorus (P) component during the manufacture of the ingot.

In addition, when manufacturing the main tray, the lower plate, and the separation panel, surface treatment may be performed using a plasma electrolyte oxidizing (PEO) method including Tech Arc Coating (TAC).

When the surface treatment is performed by the TAC method using a plasma reaction, the time for surface treatment is reduced, and corrosion resistance and hardness are improved.

In addition, referring to FIG. 3, a cable connection groove 22 is formed on one side of the separation panel 20 so that cables for interconnecting the batteries inserted between the separation panels 20 pass.

Referring to FIG. 4 on the outside of the lower surface of the main tray 10, a main border portion 11a corresponding to the periphery of the main tray 10 is formed to protrude from the bottom surface in an embossed shape, and at the center portion in the longitudinal direction. One side is connected to the main frame portion (11a), the other side is the main frame portion (11a) and the main central separation portion (12a) spaced a predetermined distance is formed in a relief shape.

In addition, on one side of the main central separation unit 12a, a plurality of main inflow passage separation units 13a, which are narrower in width than the main central separation unit 12a, are spaced apart from each other and formed in an embossed shape. At this time, the end of the main inlet flow path separation portion 13a is formed to be spaced apart from the main border portion 11a by a predetermined distance.

In addition, the main outlet flow path separation portion 15a is spaced apart a predetermined interval on the other side of the main inflow flow path separation portion 13a with respect to the main central separation portion 12a to form a relief shape.

In this case, the main outlet flow path separation unit 15a is formed to have a shorter length toward the outside from the main central separation unit 12a.

In addition, referring to FIGS. 4 and 15, at one side of the main tray 10, a plurality of port through holes 18 are formed side by side by being spaced apart by a predetermined interval with a main central separation part 12a therebetween.

In the port through hole 18, the working fluid inlet port 40 and the working fluid outlet port 50 described below are respectively inserted and coupled as shown in FIGS. 1 and 3.

In addition, a tray flow path (11a) formed in an embossed shape in the main tray 10, a main central separation part (12a), a main inflow path separation part (13a), and a main outflow path separation part (15a) 2) is formed in an engraved shape.

The tray flow path 2 forms a space through which the working fluid can flow by being combined in a shape corresponding to each other with the plate flow path formed in the lower plate 30 described below.

Meanwhile, at the edge of the main tray 10, a plurality of assembly guide grooves are provided for assembly mounting under the vehicle.

Referring to FIG. 11, the lower plate 30 is a component that is coupled to the lower side of the main tray 10, and the lower edge portion protrudes along the edge at a position corresponding to the main edge portion of the main tray outside the upper surface. And a lower central separation unit protruding at a position corresponding to the main central separation unit of the main tray, and a lower inflow channel separation unit protruding at a position corresponding to the main inflow channel separation unit of the main tray. The lower outflow path separator is formed to protrude at a position corresponding to the main outflow path separator.

The plate passage 4 is formed along the protruding lower border portion 11b of the lower plate 30, the lower central separating portion 12b, the lower inlet passage separating portion 13b, and the lower outlet passage separating portion 15b. It is formed concave.

On the other hand, referring to FIGS. 4, 11, and 14 to 15, the main central separation unit 12a, the main inflow channel separation unit 13a, and the main outflow channel separation unit 15a and the lower part of the main tray 10 A through hole for coupling that can be coupled to the lower central separation portion 12b, the lower inflow passage separation portion 13b, and the lower outlet passage separation portion 15b of the plate 30 by fastening means including bolts or screws ( 80) is formed.

When the lower side of the main tray 10 and the lower plate 30 are coupled to each other, a fastening means including a bolt or screw may be inserted into the coupling through hole 80 to be coupled.

In the case of bonding by laser welding, when the pressure of the internal working fluid is increased, there is a problem of causing stomach swelling and leakage, and when bonding by lobe lazing, there is a problem that softening occurs and the durability of the product decreases.

In order to solve this problem, the present invention forms a coupling through hole 80 in the main tray 10 and the lower plate 30, so that when the lower side of the main tray and the lower plate are mutually coupled, a fastening including bolts or screws It adopted a method of combining by means of means.

In the case of coupling using fastening means including bolts or screws, a gasket may be provided between the lower side of the main tray and the upper side of the lower plate in order to prevent leakage of the working fluid and maintain the airtight state of the flow path. have.

In this case, the gasket may be formed by providing a metal portion made of a metal material including stainless steel in the center portion, and an elastic portion made of an elastic material having elasticity including rubber or silicon on both sides of the metal portion.

When the lower side of the main tray 10 and the lower plate 30 are coupled to each other, the main frame portion 11a and the lower frame portion 11b are in close contact with each other to form an edge portion, and the main central separation portion 12a and the lower portion The central separation unit 12b is in close contact with each other to form the central separation unit 12, and the main inflow channel separation unit 13a and the lower inflow channel separation unit 13b are in close contact with each other to form a plurality of inflow channel separation units 13 And the inflow passage is formed by a plurality of inflow passage separators 13.

In addition, the main outflow channel separation unit 15a and the lower outflow channel separation unit 15b are in close contact with each other to form a plurality of outflow channel separation units 15, and the outflow channel is separated by the plurality of outflow channel separation units 15. As a result, the working fluid introduced from the working fluid inlet port 40 may flow along the inlet passage and the outlet passage and discharged to the working fluid outlet port 50.

That is, when the embossed portion of the main tray 10 and the portion protruding upwardly from the lower tray are in close contact with each other, the tray passage 2 and the lower plate 30 formed in the engraved shape of the main tray 10 ) Of the concave plate passages 4 are merged into corresponding shapes to form a complete passage.

In addition, when the working fluid flows from the inlet passage to the outlet passage, in order to reduce the flow resistance of the working fluid, the length of the outlet passage separating portion becomes shorter as it goes outward from the central separating portion, so that the width of the outlet passage introduction portion can be formed wider. have.

Referring to FIG. 9, when the length of the outlet passage is formed to have the same length, the location of the battery pack seated in the main tray because the flow of the working fluid is not smooth in the section where the working fluid passes through the central separation and flows into the outlet passage. Different cooling effects may occur.

Due to the difference in cooling effect, there is a problem in that a temperature deviation occurs for each location of the battery pack.

According to the present invention, the length of the outflow passages is configured differently, so that the flow of the working fluid can be smoother than when the outflow passages are formed with the same length, and the temperature variation by location of the battery pack is also reduced, so that the cooling of the battery pack is more efficient. Can be done with

Table 1 shows the maximum battery temperature, battery temperature deviation, cell extra temperature, and cell temperature deviation when the length of the outflow channel is the same and when the length of the outflow channel is configured differently.

division Outflow
The same length Outflow
If the length is different Battery maximum temperature 46.73℃ 46.23℃ Battery temperature deviation 1.41℃ 1.04℃ Maximum cell temperature 24.41℃ 24.35℃ Cell temperature deviation 2.26℃ 2.24℃

1 and 3, the working fluid inlet port 40 is inserted into the port through hole 18 on one side of the main tray 10 based on the first central separation unit 14, and the main tray 10 A working fluid that can flow is introduced through a flow path formed by combining the tray flow path 2 and the plate flow path of the lower plate 30.

1 and 3, the working fluid outlet port 50 has the same shape as the working fluid inlet port 40, and the working fluid inlet port 40 is based on the main central separation part 12a of the main tray 10. ) Is inserted into the other port through hole 18 at the installed position, and the working fluid introduced through the working fluid inlet port 40 flows out.

Meanwhile, referring to FIG. 3, an upper protrusion 42 and a lower protrusion 44 are formed under the working fluid inlet port 40 and the working fluid outlet port 50 at a predetermined interval, and fastened between each protrusion. Means seating portion 46 is formed. Various pressure fastening means, including buckles or clamps, which can be coupled by pressing the pipe connected to each port from the outside are coupled to the fastening means seating part 46.

On the other hand, when the working fluid inlet port 40 and the working fluid outlet port 50 are coupled to the main tray 10, the lower protrusions 44 formed in each port in the port through hole 18 formed in the main tray 10 The lower side of the can be joined by a press-fitting method including force-fitting, or by maintaining an airtight state by bonding by a fusion method including high-frequency brazing after press-fitting, leakage of the working fluid can be prevented.

In addition, the working fluid inlet port 40 and the working fluid outlet port 50 are installed in a direction perpendicular to the lower surface of the main tray 10 as shown in FIGS. 1 and 3 to provide a cooling device inside the electric vehicle. There is an effect of reducing the installed space.

On the other hand, referring to FIGS. 7 and 8, in the integrated water-cooled cooling device for cooling a battery pack according to the present invention, an inlet flow path formed by a main flow path separator and a lower flow path separator in which the working fluid for battery cooling is in close contact with each other. The flow direction of the working fluid is simplified by forming a flow path in which the flow paths are composed of multiple channels, and a flow path that changes the direction from the inflow path to the outflow path with the main central and lower central separation parts in close contact with each other is formed as a single channel. By doing so, it has the effect of reducing pipe resistance and generation of eddy currents, increasing the flow rate of fluid, and improving the cooling efficiency of the battery.

Here, referring to Figs. 7 and 8, in a state in which the main tray 10 and the lower plate 30 are coupled to each other, the working fluid flows based on the main central separation unit 14 and the second central separation unit 34 pressed together. The working fluid introduced from the port 40 flows along a plurality of flow paths formed in the direction in which the working fluid inlet port 40 is located, and flows in the direction of a plurality of flow paths formed in the direction in which the working fluid outlet port 50 is located. And discharged to the working fluid outlet port.

At this time, when the working fluid flowing into the multi-channel inlet flow path is converted to the multi-channel outlet flow path based on the main central and lower central separation parts, the fluid flow pressure is increased by passing through a single channel. There is an effect that can reduce the occurrence of eddy currents.

In other words, the flow of the working fluid is simplified by making the flow of the working fluid from the inflow and outflow of the multi-channel inlet flow path, the single channel path switching flow path, and the multi-channel outlet flow path in a "c" shape. Cooling efficiency can be improved by allowing the working fluid to flow at a high speed.

Meanwhile, in order to secondaryly increase cooling efficiency, a plurality of cooling fins (not shown) are formed on the lower surface of the lower plate 30 to perform heat exchange more quickly.

In addition, as shown in Fig. 14, on the outer surface of the lower plate, the stress generated by the improved durability of the lower plate and the flow pressure of the working fluid is not concentrated on a specific portion of the lower plate, but will be distributed evenly throughout the lower plate. In order to be able to be embossed, a continuous polygonal embossed protrusion 32 may be formed. In this case, in consideration of durability, the coupling through hole 80 may be formed along the embossed protrusion.

Referring to Figure 16, the cover case 60 is formed with a cable withdrawal groove 62 for drawing out the cable connected to the battery at the ends of the upper corner portions on both sides, as shown in FIG. It is coupled to the upper side and both sides of the main tray 10 so that the inside of the main tray 10 is kept airtight.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the technical field to which the present invention belongs can make various modifications, changes, and substitutions within the scope not departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. . The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

2-Tray Euro 4-Plate Euro
10-Main tray 11a-Main frame
11b-lower border 11-border
12a-main center division 12b-lower center division
12-Central separation part 13a-Main inflow channel separation part
13b-Lower inlet flow path separation part 13-Inflow passage separation part
14-Inflow passage 15a-Main outflow passage separation part
15b-Bottom outflow channel separation unit 15-Outflow channel separation unit
16-Outflow channel 17-Separation panel joint
18-Port through hole 20-Separation panel
22-Cable connection groove 30-Lower plate
32-Recessed protrusion 40-Working fluid inlet port
50-Working fluid outlet port 60-Cover case
80-Mating hole

Claims (3)

The main border portion formed by protruding in an embossed shape along the outer edge of the lower surface,
At the center, one side is connected to the main frame, and the other side is separated from the main frame by a predetermined distance and formed in an embossed shape.
A plurality of main inlet flow path separators formed in an embossed shape with a predetermined interval on one side of the main central separator,
A plurality of main outflow path separators formed in an embossed shape separated by a predetermined distance from the other side of the main inflow path separator based on the main central separator,
A plurality of port through holes formed at predetermined intervals with the main central separation part therebetween,
Separation panel coupling part formed in an intaglio with a predetermined interval on the inside of the upper surface
Main tray including a;
A plurality of separation panels coupled to the separation panel coupling portion of the main tray so that a plurality of battery packs can be mounted side by side and detachable;
A lower border part protruding along the edge at a location corresponding to the main border part of the main tray on the outside of the upper surface,
A lower central separation unit protruding from a position corresponding to the main central separation unit of the main tray,
A lower inlet passage separating portion protruding at a position corresponding to the main inlet passage separating portion of the main tray,
A lower outflow path separator protruding at a location corresponding to the main outflow path separator of the main tray,
A lower plate comprising a;
A working fluid inlet port into which the working fluid is introduced and inserted into the port through hole on one side of the main tray;
A working fluid outlet port that is inserted into the other port through hole based on the main central separation part of the main tray, and through which the working fluid flows out; And
A gasket provided between the lower side of the main tray and the upper side of the lower plate when the lower side of the main tray and the lower plate are coupled to each other to prevent leakage of the working fluid and maintain the airtight state of the flow path.
Including,
When the lower side of the main tray and the lower plate are combined with each other,
The main border and the lower border are in close contact with each other to form an edge,
The main central separation unit and the lower central separation unit are in close contact with each other to form a central separation unit,
The main inflow path separator and the lower inflow path separator are in close contact with each other to form a plurality of inflow path separators,
An inflow passage is formed by a plurality of inflow passage separators,
The main outflow path separator and the lower outflow path separator are in close contact with each other to form a plurality of outflow path separators,
An outflow path is formed by a plurality of outflow path separators
The working fluid flowing in from the working fluid inlet port flows along the inlet and outlet passages and is discharged to the working fluid outlet port
Including,
Combination for coupling by fastening means including bolts or screws to the main central separation portion of the main tray, the main inflow passage, and the main outlet passage and the lower central separation portion of the lower plate, the lower inflow passage and the lower outlet passage portions A dragon hole is formed,
When the lower side of the main tray and the lower plate are coupled to each other, a fastening means including bolts or screws is inserted into the coupling hole to be coupled.
Containing, water-cooled battery pack cooling device for reducing the flow resistance of the working fluid. The method of claim 1,
When the working fluid flows from the inlet passage to the outlet passage, in order to reduce the flow resistance of the working fluid, the length of the outlet passage separating portion becomes shorter as it goes outward from the central separating portion so that the width of the outlet passage introduction portion becomes wider.
Containing, water-cooled battery pack cooling device for reducing the flow resistance of the working fluid. The method of claim 1,
In order to disperse the stress generated in the lower plate by the flow pressure of the working fluid, a polygonal relief protrusion is formed on the outer surface of the lower plate in a continuous relief shape
Containing, water-cooled battery pack cooling device for reducing the flow resistance of the working fluid.

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