KR20230173375A - Cooling device for battery - Google Patents

Abstract

The present invention relates to a battery cooling device that improves the cooling performance and efficiency of the battery by flowing coolant while the main flow path is evenly distributed at the battery location. In the present invention, the main flow path is formed inside to exchange heat with the battery pack, and the main flow path is formed inside the battery pack to exchange heat with the battery pack. A cooling panel in which the coolant flowing in through the inlet of the flow path is circulated throughout in a zigzag shape and then discharged through the outlet; A first side panel coupled in a shape that blocks one side of the cooling panel, and formed by communicating the inlet and the main flow passage entrance so that coolant flowing through the inlet flows into the main flow passage; A battery cooling device including a second side panel is coupled in a shape that blocks the other side of the cooling panel, and is formed by communicating the outlet of the main flow path with the outlet so that the coolant discharged through the outlet of the main flow path is discharged through the outlet. do.

Description

Battery cooling device {Cooling device for battery}

The present invention relates to a battery cooling device that improves the cooling performance and efficiency of the battery by allowing coolant to flow through the flow path formed in the panel evenly distributed at the battery location.

High-voltage batteries are used in hybrid vehicles, electric vehicles, and fuel cell vehicles to supply electrical energy to drive the vehicle.

Such high-voltage batteries use a large amount of current and generate a lot of heat internally, so cars using high-voltage batteries are equipped with a cooling system to cool the high-voltage battery.

In particular, as battery capacity is generally increased to increase the driving range of vehicles, technology development for improving the performance of cooling systems is becoming increasingly important.

The matters described as background technology above are only for the purpose of improving understanding of the background of the present invention, and should not be taken as acknowledgment that they correspond to prior art already known to those skilled in the art.

KR 10-2016-0113902 A

The present invention was devised to solve the above-described problems, and its object is to provide a battery cooling device that improves the cooling performance and efficiency of the battery by flowing coolant by evenly distributing the flow path formed in the panel to the battery location.

The configuration of the present invention to achieve the above object is that a main flow path is formed inside to exchange heat with the battery pack, and the cooling water flowing in through the inlet of the main flow path is circulated overall in a zigzag shape and then discharged through the outlet. panel; A first side panel coupled in a shape that blocks one side of the cooling panel, and formed by communicating the inlet and the main flow passage entrance so that coolant flowing through the inlet flows into the main flow passage; A second side panel is coupled in a shape that blocks the other side of the cooling panel, and is formed by communicating the outlet of the main flow path with the outlet so that the coolant discharged through the outlet of the main flow path is discharged through the outlet. there is.

Both sides of the main flow path are open, and the remaining portions of both sides of the main flow path except the inlet and outlet can be blocked by being in close contact with the first side panel and the second side panel, respectively.

A plurality of partition walls are formed side by side at a predetermined interval inside the cooling panel to define a main passageway, and one end and the other end of the partition walls are alternately opened to form the main flow path in a zigzag shape.

A first side passage is formed along the longitudinal direction inside the first side panel adjacent to one side of the cooling panel, and an inlet is formed within the first side passage, and only the portion of the first side passage corresponding to the inlet of the main passage is formed. An opening is formed so that the inlet and the entrance of the main flow path communicate through the first side flow path; A second side passage is formed along the longitudinal direction inside the second side panel in contact with the other side of the cooling panel, an outlet is formed within the second side passage, and only the portion of the second side passage corresponding to the outlet of the main passage is formed. An opening is formed so that the outlet and the outlet of the main flow path can communicate through the second side flow path.

The cross-sectional area of the main flow path located far from the inlet may be formed to be smaller than the cross-sectional area of the main flow path located close to the inlet.

At the end of the cooling panel located far from the inlet, a sub-passage having a smaller cross-sectional area than the main flow path may be connected between the first side panel and the second side panel.

A plurality of cooling panels are connected along the front and rear longitudinal directions of the battery pack, so that coolant flowing in through the inlet can be distributed inside each cooling panel.

A front panel in which the first and second side panels protrude in front of the cooling panel and is coupled between the protruding first and second side panels in a shape that prevents the shear of the cooling panel; It may further include a rear panel coupled in a shape that blocks the cooling panel and the rear ends of the first and second side panels.

The heights of the contact parts between the cooling panels, the first side panel, the second side panel, the front panel, and the rear panel all match, and the contact parts can be welded.

Welding ribs are formed to protrude only at the contact portions of the front panel and rear panel that are in contact with the cooling panel, first side panel, and second side panel, so that friction stir welding can be performed on the welding ribs.

The cooling panel and the front panel are first welded, the cooling panels are secondarily welded, the cooling panel, the first and second side panels, and the rear panel are thirdly welded, and the cooling panel, the front panel, and the first and second side panels are welded. 4th welding, but during the 4th welding, welding can be done from the rear panel to the front panel.

Through the above-described problem solving means, the present invention allows coolant to flow along the flow path formed inside the panel and circulate evenly throughout the entire battery to exchange heat with the battery, thereby ensuring sufficient time for heat transfer to the battery and cooling the battery. Efficiency and cooling performance are greatly improved.

Figure 1 is a diagram showing the assembled state of panels implementing the battery cooling device of the present invention.
Figure 2 is a diagram showing the main flow path formed by the battery cooling device of the present invention.
Figure 3 is a diagram showing a cooling panel according to the present invention.
Figure 4 is a diagram showing a side panel according to the present invention.
Figure 5 is a diagram showing the cooling panel and side panel separated according to the present invention.
Figure 6 is a diagram for explaining the coupling relationship between the cooling panel and the side panel according to the present invention.
Figure 7 is an enlarged view of part 'A' of Figure 1.
Figure 8 is an enlarged view of part 'B' of Figure 1.
Figure 9 is a view for explaining welding ribs formed on the front panel of the present invention.
Figure 10 is a view for explaining the welding rib formed on the rear panel of the present invention.
Figure 11 is a diagram for explaining the welding sequence and direction between panels in the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves.

In describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Before explaining the battery cooling device of the present invention, the battery system will be briefly described with reference to FIG. 1. A battery cooling device is installed in a panel assembly structure at the bottom of the floor of a vehicle, and a battery pack is installed on the panel assembly structure. It can be seated in a contact state.

In particular, the main flow path 110 is formed inside the cooling panel 100, and the side flow path is formed inside the side panel, so that heat exchange occurs between the coolant flowing through the flow path of each panel and the battery pack, thereby maintaining the battery. It cools down.

Meanwhile, Figure 1 is a diagram showing the assembled state of panels implementing the battery cooling device of the present invention, and Figure 2 is a diagram showing the main passage 110 formed by the battery cooling device of the present invention.

Referring to the drawing, in the present invention, a main passage 110 is formed inside to exchange heat with the battery pack, and the coolant flowing in through the inlet 112 of the main passage 110 is circulated overall in a zigzag shape and then reaches the outlet 114. ) Cooling panel (100) discharged through; It is combined in a shape that blocks one side of the cooling panel 100, and the inlet 220 and the inlet 112 of the main passage 110 are connected so that the coolant flowing through the inlet 220 flows into the main passage 110. A first side panel (200) formed through; It is combined in a shape that blocks the other side of the cooling panel 100, and the outlet 320 and the main passage 110 are connected so that the coolant discharged through the outlet 114 of the main passage 110 is discharged through the outlet 320. It is configured to include a second side panel 300 formed by connecting the outlet 114.

Specifically, a battery pack is constructed by assembling multiple battery modules aligned in front-to-back and left-right directions.

In addition, the main passage 110 is formed inside the cooling panel 100, and the main passage 110 is formed throughout the cooling panel 100 in a zigzag shape from side to side, so that the coolant flows through the entire cooling panel 100. It flows and circulates evenly.

At both ends of the main passage 110, an inlet 112 for introducing coolant and an outlet 114 for discharging the coolant flowing into the main passage 110 are formed.

The inlet 112 of the main passage 110 is opened toward one side of the cooling panel 100, and the outlet 114 of the main passage 110 is opened toward the other side of the cooling panel 100.

In addition, an inlet 220 is provided in the first side panel 200, and the side of the first side panel 200 is coupled to one side of the cooling panel 100, so that the coolant flowing in through the inlet 220 is the main It flows into the inlet 112 of the flow path 110.

In addition, an outlet 320 is provided in the second side panel 300, and the side of the second side panel 300 is coupled to the other side of the cooling panel 100, thereby forming an outlet 114 of the main flow path 110. The coolant discharged through the outlet 320 is discharged.

That is, as shown in FIGS. 1 and 2, the coolant flowing into the first side panel 200 through the inlet 220 flows into the main flow path 110, and the coolant discharged from the main flow path 110 flows into the second side panel 200. After flowing into the side panel 300, the coolant is discharged through the outlet 320 and flows in circulation.

In this way, the coolant flowing along the passage inside the cooling panel 100 and the first and second side panels 200 and 300 circulates throughout the cooling panel 100 and the first and second side panels 200 and 300 and exchanges heat with the battery. , sufficient time for heat transfer to the battery is secured, greatly improving the cooling efficiency and cooling performance of the battery.

Meanwhile, Figure 3 is a diagram showing a cooling panel 100 according to the present invention.

Referring to Figures 1 and 3, the cooling panel 100 is extruded to form a shape in which both sides of the main flow path 110 are open, and among the two sides of the main flow path 110, an inlet 112 and an outlet 114 are formed. The remaining parts except for are in close contact with the first side panel 200 and the second side panel 300, respectively, and are blocked.

That is, since the cooling panel 100 is molded by the extrusion method, before assembling the first and second side panels 200 and 300 to the cooling panel 100, not only the inlet 112 and outlet 114 of the main flow path 110 Rather, the remaining parts are all formed in an open state.

Accordingly, both sides of the cooling panel 100 are assembled in a shape that is blocked by the first side panel 200 and the second side panel 300, so that the inlet 112 and outlet 114 of the main passage 110 Only the remaining side portion of the main flow path 110 is blocked, allowing coolant to flow along the main flow path 110.

In addition, in the present invention, a plurality of partition walls 120 are formed side by side at a predetermined distance back and forth inside the cooling panel 100 to define the passage of the main passage 110, and one end and the other end of the partition wall 120 are formed in parallel. The main passages 110 may be formed in a zigzag shape by opening them alternately in turn.

That is, several partition walls 120 are formed in the left and right longitudinal directions inside the cooling panel 100, so that the passages forming the main passage 110 are partitioned front and back by the partition walls 120.

In addition, the left and right ends of the partition wall 120 are alternately formed in an open shape, so that the main passage 110 is formed in a zigzag shape.

To elaborate, as the cooling panel 100 is molded by the extrusion method, the partition wall 120 has a shape that extends to the left and right ends of the cooling panel 100, so that it extends to the left end along the passage forming the main passage 110. The main passage 110 is formed in a zigzag shape by alternately removing the portion and the right end portion.

Therefore, the coolant flowing into the inlet 112 of the main flow path 110 flows into the adjacent passage through the open portion on the opposite side of the inlet 112, so that the coolant can flow along the zigzag-shaped main flow path 110. There will be.

Meanwhile, Figure 4 is a drawing showing a side panel according to the present invention, Figure 5 is a drawing showing the cooling panel 100 and the side panel according to the present invention separately, and Figure 6 is a drawing showing the cooling panel (100) according to the present invention. This is a drawing to explain the connection relationship between 100) and the side panel.

Referring to the drawing, a first side passage 210 is formed in the front-back longitudinal direction inside the first side panel 200 adjacent to one side of the cooling panel 100, through which coolant flows.

And, among the side surfaces of the first side passage 210, only the portion corresponding to the inlet 112 of the main passage 110 is opened. Additionally, an inlet 220 is provided at the inner end of the first side passage 210, and a cooling pipe is connected to the inlet 220.

Therefore, the inlet 220 and the inlet 112 of the main passage 110 are communicated through the first side passage 210, so that the coolant flowing from the inlet 220 flows into the inlet 112 of the main passage 110. do.

In addition, a second side passage 310 is formed in the front-back longitudinal direction inside the second side panel 300, which is in contact with the other side of the cooling panel 100, through which coolant flows.

And, of the second side passage 310, only the portion corresponding to the outlet 114 of the main passage 110 is opened. Additionally, an outlet 320 is provided at the inner end of the second side passage 310, and a cooling pipe is connected to the outlet 320.

Therefore, the outlet 114 of the main passage 110 and the outlet 320 are communicated through the second side passage 310, so that the coolant discharged from the outlet 114 of the main passage 110 flows into the second side passage 310. ) and is discharged to the outlet 320.

Furthermore, as the cooling panel 100 is extruded, the end area (a) between the partition walls 120 located at the left and right ends of the main passage 110 is formed open.

And, the end area (a) is located on the inner surface of the first side panel 200 that blocks one side of the cooling panel 100 and the inner surface of the second side panel 300 that blocks the other side of the cooling panel 100. Fitting portions 230 and 330 are respectively protruding and formed in corresponding shapes.

Accordingly, the fitting portions 230 and 330 are inserted into each end region (a), so that the first side panel 200 and the second side panel 300 are firmly assembled on both sides of the cooling panel 100.

Preferably, the end area (a) is formed in a square cross-sectional shape, and the fitting portions 230 and 330 are formed in a square block shape and can be fitted.

In addition, among the fitting parts (230,330), several cylindrical through holes (232,332) are inserted into the end area (a) corresponding to the inlet (112) and outlet (114) of the main flow passage (110). By forming the inlet 112 and the outlet 114 through the through holes 232 and 332, the coolant passes through.

For reference, as shown in FIG. 4, the first side panel 200 and the second side panel 300 are also molded by the extrusion method like the cooling panel 100. Accordingly, both ends of the first side passage 210 and the second side passage 310 formed in the first side panel 200 and the second side panel 300 are blocked by inserts, so that Coolant can flow.

In addition, as shown in FIG. 1, the cross-sectional area of the main passage 110 located far from the inlet 220 may be formed to be smaller than the cross-sectional area of the main passage 110 located close to the inlet 220.

For example, when the inlet 220 is installed at the front end of the first side panel 200, the cross-sectional area of the main passage 110 installed at the rear end of the first side panel 200 is close to the front end of the first side panel 200. It is formed smaller than the cross-sectional area of the main passage 110.

This means that the cross-sectional area can be made progressively smaller the further away the main passage 110 is from the inlet 220.

Preferably, in the case as shown in FIG. 1 where several cooling panels 100 are installed back and forth, the cross-sectional area of the main flow path 110 of the entire cooling panel 100 far from the inlet 220 is changed to a cooling panel close to the inlet 220. It can be formed to be smaller than the cross-sectional area of the main passage 110 of the panel 100.

That is, the supply pressure of coolant to the cooling panel 100 close to the inlet 220 is high, and the supply pressure of coolant to the cooling panel 100 far from the inlet 220 is low, so that the supply pressure of the coolant is low to the cooling panel 100 that is far from the inlet 220. The average temperature is higher than the average temperature of the battery located close to the inlet 220.

Accordingly, the cross-sectional area of the main passage 110 away from the inlet 220 is formed to be relatively small to increase the supply pressure of the coolant at that location, thereby improving the overall cooling efficiency of the battery.

Furthermore, the present invention provides a sub-passage 130 with a smaller cross-sectional area than the main passage 110 at the end of the cooling panel 100 located far from the inlet 220, which is connected to the first side panel 200 and the second side panel. It can be connected between (300).

For example, by installing the inlet 220 at the front end of the first side panel 200, the first side panel 200 and the second side panel 200 are connected to each other at the end of the cooling panel 100 located at the rear end of the first side panel 200. A communication is formed between the side panels 300 in the left and right longitudinal directions.

Accordingly, the supply pressure of the coolant is increased in the part of the cooling panel 100 that is far from the inlet 220, thereby improving the cooling efficiency of the battery.

Meanwhile, as shown in FIG. 1, in the present invention, a plurality of cooling panels 100 are connected along the longitudinal direction of the battery pack, so that coolant flowing in through the inlet 220 can be distributed inside each cooling panel 100.

For example, when four cooling panels 100 are connected in the front-to-back longitudinal direction, a main passage 110 is formed for each cooling panel 100, and each main passage 110 has an inlet 112 and an outlet 114. ) will have.

Accordingly, the coolant inside the first side passage 210 flows into each main passage 110 through the inlet 112 of each cooling panel 100, thereby evenly exchanging heat with the battery placed on the cooling panel 100. This will come true.

Meanwhile, in the present invention, the first and second side panels (200, 300) protrude in front of the cooling panel (100), and are coupled between the protruding first and second side panels (200, 300) to prevent shearing of the cooling panel (100). Front panel 400 combined in shape; It is configured to further include a cooling panel 100 and a rear panel 500 that is joined in a shape to block the rear ends of the first and second side panels 200 and 300.

Preferably, the rear of the front panel 400 is coupled to the front of the cooling panel 100, and both sides of the front end of the front panel 400 are coupled to the inner surfaces of the first and second side panels 200 and 300.

Then, the front of the rear panel 500 is coupled to the rear of the cooling panel 100 and the rear of the first and second side panels 200 and 300. That is, the first side panel 200 and the second side panel 300 are combined on the left and right sides of the cooling panel 100, and the front panel 400 and rear panel 500 are connected before and after the cooling panel 100. Thus, the battery cooling device is implemented using a panel assembly structure.

In addition, Figure 7 is an enlarged view of part 'A' of Figure 1, and Figure 8 is an enlarged view of part 'B' of Figure 1, and the panels are joined by welding.

Referring to the drawing, the heights of the contact areas between the cooling panels 100, the first side panel 200, the second side panel 300, the front panel 400, and the rear panel 500 are all The parts that are aligned and in contact can be welded by friction stir welding.

For example, the heights of contact parts between multiple cooling panels 100 are matched, and the heights of contact parts between the cooling panel 100 and the first side panel 200 and the second side panel 300 are matched.

In addition, the height of the contact area between the cooling panel 100 and the front panel 400 is matched, the height of the contact area between the cooling panel 100 and the rear panel 500 is matched, and the first side panel 200 and The heights of the contact areas between the second side panel 300, the front panel 400, and the rear panel 500 are matched, and the matched parts are welded.

In other words, friction stir welding is a welding method that uses frictional heat generated by rotating the welding tool along the welding area. By performing welding work by eliminating height steps in the area where each panel touches, the welding quality is improved and watertight performance is improved. secured.

Figure 9 is a diagram for explaining the welding rib 410 formed on the front panel 400 of the present invention, and Figure 10 is a diagram explaining the welding rib 510 formed on the rear panel 500 of the present invention.

Referring to the drawings, the front panel 400 and rear panel 500 in contact with the cooling panel 100, first side panel 200, and second side panel 300 have welding ribs 410 and 510 only at the contact portion. are each protruding, and friction stir welding is performed on the welding ribs 410 and 510.

That is, welding ribs 410, 510 are formed only in the parts that require welding on the front panel 400 and rear panel 500, and welding is performed on the panel in contact with the welding ribs 410, 510, while welding is performed on the panel parts that do not require welding. By forming it into a thin plate shape, the front panel 400 and rear panel 500 are lightweight.

In addition, referring to FIG. 11, the present invention involves first welding the cooling panel 100 and the front panel 400, secondary welding the cooling panels 100, and welding the cooling panel 100 and the first and second The side panels (200, 300) and the rear panel (500) are welded a third time, and the cooling panel (100), the front panel (400), and the first and second side panels (200, 300) are welded a fourth time, and during the fourth welding, the rear panel is welded. Welding is performed in the direction from (500) to the front panel (400).

For example, by structurally joining each panel to each other by friction stir welding, first, lines ① to ⑦ are sequentially welded in the direction indicated by the arrow, and then line ⑧ is welded.

At this time, in the case of lines ① to ⑦, a weld mark of the end hole (END HOLE) occurs at the point where the welding ends, but in the case of line ⑧, a cap member whose height matches the side panel and the welding rib is installed at the point where the welding ends. It is additionally installed to prevent end holes from occurring at the welded ends of the side panel and rear panel 500.

Next, weld along lines ⑨ and ⑩ to join the first and second side panels (200, 300), the front panel (400), the cooling panel (100), and the rear panel (500), while welding the end holes that occurred on lines ① to ⑦. It will be filled.

As described above, in the present invention, the coolant flows along the flow path inside the cooling panel and the side panel and circulates evenly throughout the entire battery to exchange heat with the battery, thereby ensuring sufficient time for heat transfer to the battery and cooling the battery. Efficiency and cooling performance are greatly improved.

Meanwhile, although the present invention has been described in detail only with respect to the above-mentioned specific examples, it is clear to those skilled in the art that various changes and modifications are possible within the technical scope of the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims. .

100: Cooling panel
110: Main Euro
112: Entrance
114: exit
120: bulkhead
130: Sub Euro
200: 1st side panel
210: 1st side passage
220: inlet
230: Fitting part
232: Tonggong
300: 2nd side panel
310: 2nd side passage
320: outlet
330: Fitting part
332: Tonggong
400: Front panel
410: welding rib
500: Rear panel
510: weld rib

Claims (11)

A cooling panel in which a main flow path is formed inside to exchange heat with the battery pack, and the coolant flowing in through the inlet of the main flow path is circulated throughout in a zigzag shape and then discharged through the outlet;
A first side panel coupled in a shape that blocks one side of the cooling panel, and formed by communicating the inlet and the main flow passage entrance so that coolant flowing through the inlet flows into the main flow passage;
A second side panel is coupled to the other side of the cooling panel in a shape to block the other side of the cooling panel, and is formed by communicating the outlet of the main flow path with the outlet so that the coolant discharged through the outlet of the main flow path is discharged through the outlet. In claim 1,
A battery cooling device characterized in that both sides of the main passage are open, and the remaining portions of both sides of the main passage except the inlet and outlet are tightly closed to the first side panel and the second side panel, respectively. In claim 1,
A plurality of partition walls are formed in parallel at predetermined intervals inside the cooling panel to define the passage of the main flow path, and one end and the other end of the partition walls are alternately opened in turn, forming the main flow path in a zigzag shape. Battery cooling device. In claim 1,
A first side passage is formed along the longitudinal direction inside the first side panel adjacent to one side of the cooling panel, and an inlet is formed within the first side passage, and only the portion of the first side passage corresponding to the inlet of the main passage is formed. An opening is formed so that the inlet and the entrance of the main flow path communicate through the first side flow path;
A second side passage is formed along the longitudinal direction inside the second side panel in contact with the other side of the cooling panel, an outlet is formed within the second side passage, and only the portion of the second side passage corresponding to the outlet of the main passage is formed. A battery cooling device characterized in that an opening is formed so that the outlet of the main flow path communicates with the outlet through the second side flow path. In claim 1,
A battery cooling device, characterized in that the cross-sectional area of the main flow path located far from the inlet is formed to be smaller than the cross-sectional area of the main flow path located close to the inlet. In claim 1,
A battery cooling device, characterized in that at the end of the cooling panel located far from the inlet, a sub-passage having a smaller cross-sectional area than the main flow path is connected between the first side panel and the second side panel. In claim 1,
A battery cooling device, wherein a plurality of cooling panels are connected along the front and rear longitudinal directions of the battery pack, and coolant flowing in through the inlet is distributed inside each cooling panel. In claim 1,
A front panel in which the first and second side panels protrude in front of the cooling panel and is coupled between the protruding first and second side panels in a shape that prevents the shear of the cooling panel;
A battery cooling device characterized in that it further includes a rear panel coupled in a shape to block the cooling panel and the rear ends of the first and second side panels. In claim 7 or claim 8,
A battery cooling device, characterized in that the heights of the contact portions of the cooling panels, the first side panel, the second side panel, the front panel, and the rear panel are all matched, and the matched contact portions are welded. In claim 9,
A battery cooling device, characterized in that welding ribs are formed to protrude only at the contact portions of the front panel and rear panel that are in contact with the cooling panel, first side panel, and second side panel, and friction stir welding is performed on the welding ribs. In claim 9,
The cooling panel and the front panel are first welded, the cooling panels are secondarily welded, the cooling panel, the first and second side panels, and the rear panel are thirdly welded, and the cooling panel, the front panel, and the first and second side panels are welded. A battery cooling device characterized in that the fourth welding is performed in the direction from the rear panel to the front panel during the fourth welding.

Images