CN219303763U - Heat exchange device, battery pack and vehicle - Google Patents

Abstract

The present application provides a heat exchange device, a battery pack, and a vehicle. The heat exchange device includes a plate body and a flow channel structure; The second flow channel group is located on both sides of the first flow channel group, the first flow channel group is provided with an inlet for the heat exchange medium to flow in, and the second flow channel group is provided with an outlet for the heat exchange medium to flow out; the first flow channel group includes multiple A parallel first direct channel, each first direct channel is connected in series with the second channel group by connecting the direct channel, the second channel group includes a plurality of parallel second direct channels, the first direct channel and the second channel group The two straight channels extend along the second direction, and the connecting direct channels extend along the first direction, so as to ensure the heat exchange effect between the heat exchange medium and the battery, shorten the flow of the heat exchange medium during the heat exchange process, and reduce the heat exchange rate. The possibility of the heat medium being completely vaporized in the flow channel reduces the temperature difference in each area of the plate body and improves the temperature uniformity.

Description

Heat exchange device, battery pack and vehicle

technical field

The present disclosure relates to the technical field of battery heat management, and in particular to a heat exchange device, a battery pack and a vehicle.

Background technique

With the rapid development of new energy vehicles, the market has higher and higher requirements for the power battery life of new energy vehicles, so the thermal management requirements for batteries have also increased.

The thermal management of power batteries is generally realized through a liquid cooling system. However, the heat exchange efficiency between the liquid cooling system and the battery is limited, and the cost is high, the structure is complex, and the weight of the battery will be increased to a certain extent. Therefore, the current A new thermal management solution is adopted. By using the air-conditioning refrigerant of new energy vehicles as the heat exchange medium, it is only necessary to set the heat exchange plate with flow channels in the battery pack without additional liquid cooling system. Battery heat exchange.

In the related art, a cooling cover plate is provided. The cooling cover plate is provided with a cooling flow channel, and the cooling flow channel includes an inlet, an outlet, an inlet main flow section, two first flow sections, four second flow sections and eight third flow sections. section, wherein, in order to improve heat dissipation efficiency, the third split section includes a direct-flow end, a plurality of U-shaped sections and an intermediate connection section, and the plurality of U-shaped sections are arranged in sequence along the extension direction of the direct-flow section. At this time, the refrigerant flows from the inlet The process of flowing in and flowing out from the outlet is relatively long, and the liquid refrigerant may be completely volatilized into a gas state during the heat exchange process, resulting in a large temperature difference with other refrigerants in a liquid state or a gas-liquid mixed state. The problem of uneven temperature distribution in the heat exchange plate is caused.

Utility model content

The present application provides a heat exchange device, a battery pack and a vehicle, which at least solve the problem of uneven temperature distribution of the current heat exchange device.

In one aspect, the present application provides a heat exchange device, including a plate body and a flow channel structure; the flow channel structure is arranged on the plate body, and the flow channel structure includes a first flow channel group, a connecting straight channel, and a first flow channel located along a first direction. The second flow channel group on both sides of the group, the first flow channel group is provided with an inlet for the heat exchange medium to flow in, and the second flow channel group is provided with an outlet for the heat exchange medium to flow out; the first flow channel group includes a plurality of parallel The first direct channel, each first direct channel is connected in series with the second channel group by connecting the direct channel, the second channel group includes a plurality of parallel second direct channels, the first direct channel and the second direct channel respectively extend along the second direction, the connecting direct current channel extends along the first direction, and the first direction and the second direction intersect each other.

According to an aspect of the present application, the cross-sectional area of the first straight channel along the first direction, the cross-sectional area of the connecting straight channel along the second direction and the cross-sectional area of the second straight channel along the first direction are respectively the same.

According to one aspect of the present application, the dimension L ₁ of the first straight channel along the first direction satisfies: 5mm≤L ₁ ≤15mm, and the dimension _L2 of the first straight channel along the third direction satisfies: 1mm≤L ₂ ≤3.5 mm, the first direction is perpendicular to the third direction.

According to one aspect of the present application, the first flow channel group further includes an inlet flow channel extending along the second direction, the inlet flow channel includes a first flow section and a plurality of parallel second flow sections, the inlet is arranged on the first flow section, and the first flow section It communicates with a plurality of second flow sections respectively, and each second flow section communicates with a plurality of first straight passages respectively.

According to one aspect of the present application, the second flow section includes a first sub-flow section and a plurality of parallel second sub-flow sections, the first sub-flow section communicates with the first flow section, and the first sub-flow section communicates with multiple second sub-flow sections. The flow sections are respectively connected, and each second sub-flow section is respectively connected with a plurality of first straight channels.

According to one aspect of the present application, the cross-sectional area of the first flow section along the first direction and the cross-sectional area of the second flow section along the first direction are the same.

According to an aspect of the present application, the second channel group further includes an outlet channel, the outlet channel includes a third flow section and a fourth flow section communicating with each other, the third flow section extends along the first direction, and the fourth flow section extends along the The second direction extends, the outlet is arranged in the fourth flow section, and each second straight passage in the second flow passage group communicates with the fourth flow section through the third flow section.

According to one aspect of the present application, a relief portion is formed on one side of the plate body that is not provided with the inlet and the outlet.

Another aspect of the present application also provides a battery pack, including a box body, a battery assembly, and the heat exchange device as described in any one of the above, the battery assembly is arranged in the box, the heat exchange device is arranged in the box, and the heat exchange device The board body is attached to the battery pack.

Another aspect of the present application also provides a vehicle, including an air-conditioning system and the above-mentioned battery pack, where the inlet of the heat exchange device in the battery pack communicates with the medium channel of the air-conditioning system.

The heat exchange device, battery pack and vehicle provided by this application, the heat exchange device includes a plate body and a flow channel structure, the flow channel structure is arranged on the plate body, and the flow channel structure includes a first flow channel group, a connecting straight channel and a second flow channel group , the first flow channel group is provided with an inlet for the heat exchange medium to flow in, and the second flow channel group is provided with an outlet for the heat exchange medium to flow out; the first flow channel group includes a plurality of parallel first flow channels, each first straight The flow channel is connected in series with the second flow channel group by connecting the straight channel. The second flow channel group is respectively located on both sides of the first flow channel group along the first direction. The length of the connecting flow path between the flow path and the second flow path is relatively short, and the second flow path group includes a plurality of parallel second flow paths, the first flow path and the second flow path respectively extend along the second direction, The connecting straight passage extends along the first direction, so that the heat exchange medium flowing in from the inlet flows into multiple second straight passages through the first straight passage and the connecting straight passage, and finally flows to the outlet. At the same time, the heat exchange effect of the battery can make the heat exchange medium flow in a straight line in the first direct channel, the second direct channel and the connecting direct channel, and the flow is relatively short, which can reduce the heat transfer medium being completely absorbed in the flow channel. The possibility of gasification reduces the temperature difference in various areas of the plate body and improves the temperature uniformity of the heat exchange plate.

Description of drawings

Fig. 1 is a structural schematic diagram of a heat exchange device improved in some embodiments of the present application;

Fig. 2 is a structural schematic diagram of another perspective of the heat exchange device provided by some embodiments of the present application;

Fig. 3 is a partial cross-sectional view along the first direction of the first flow path provided by some embodiments of the present application;

Fig. 4 is another structural schematic diagram of the heat exchange device provided by some embodiments of the present application;

Fig. 5 is an enlarged view of A-A in Fig. 4 .

Label description:

Board body 10;

Flow path structure 20; first flow path group 201; connecting straight path 202; second flow path group 203; inlet 204; outlet 205; first straight path 206; second straight path 207; inlet flow path 208; first flow section 209; second flow section 210; first sub-flow section 211; second sub-flow section 212; outlet channel 213; third flow section 214; fourth flow section 215;

The first direction X; the second direction Y; the third direction Z.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.

The air-conditioning refrigerant is the refrigerant, which is a substance that can achieve heat exchange through evaporation and condensation. It is easy to absorb heat and convert it into gas, and it is easy to release heat and convert it into liquid; when using air-conditioning refrigerant as the heat exchange medium of the battery, The air-conditioning refrigerant can be in a liquid state when it enters the flow channel of the heat exchange plate by means of pressurization, and then the liquid air-conditioning refrigerant in the flow channel of the heat exchange plate will be partially converted due to heat exchange during the heat exchange process At this time, the refrigerant in the flow channel will be in a gas-liquid mixed state as a whole. Since the temperature of the refrigerant in the gas-liquid mixed state is constant and always at the boiling point, it can perform efficient heat exchange with the battery, and its heat exchange efficiency is comparable to that of a battery. Compared with liquid cooling heat exchange, it will increase significantly.

However, when the flow channel of the heat exchange plate is longer, the flow of the refrigerant in the flow channel is longer. Since the refrigerant continuously exchanges heat with the battery when flowing in the flow channel, the degree of its vaporization will vary with the process flow. The temperature of the refrigerant in the gaseous state and the refrigerant in the liquid state or gas-liquid mixed state are very different, resulting in flow The temperature difference at different positions of the channel is relatively large, which causes the problem of uneven temperature distribution in the heat exchange plate.

In view of this, the inventors of the present application propose a heat exchange device, a battery pack and a vehicle, including a plate body and a flow channel structure, the flow channel structure is arranged on the plate body, and the flow channel structure includes a first flow channel group, a bent flow channel And the second flow channel group, the first flow channel group is provided with an inlet for the heat exchange medium to flow in, and the second flow channel group is provided with an outlet for the heat exchange medium to flow out; the first flow channel group includes a plurality of parallel first flow channels, each A first flow channel is connected in series with the second flow channel group by bending the flow channel, and the second flow channel group is respectively located on both sides of the first flow channel group along the first direction, and is connected to the same side of the first flow channel group. The length of the connecting straight path between the first straight path and the second straight path is relatively short, and the second flow path group includes a plurality of parallel second straight paths, and the first straight path and the second straight path are respectively along the second straight path. Direction extending, the connecting straight channel extends along the first direction, so that the heat exchange medium flowing in from the inlet flows into multiple second straight channels through the first straight channel and the connecting straight channel, and finally flows to the outlet. At the same time as the heat exchange effect of the heat medium and the battery, the heat exchange medium can be in a straight-line flow state in the first direct path, the second direct path and the connecting direct path, and the flow is relatively short, thereby reducing the flow rate of the heat exchange medium. The possibility of being completely gasified in the channel reduces the temperature difference in each area of the plate body and improves the temperature uniformity of the heat exchange plate.

In order to solve the technical problem, the present application provides a heat exchange device, a battery pack and a vehicle. The heat exchange device will be introduced first below.

Fig. 1 is a schematic structural view of a heat exchange device improved by some embodiments of the present application, and Fig. 2 is a structural schematic view of another perspective of the heat exchange device provided by some embodiments of the present application.

As shown in Figures 1 and 2, the embodiment of the present application provides a heat exchange device on the one hand, including a plate body 10 and a flow channel structure 20, the flow channel structure 20 is arranged on the plate body 10, and the flow channel structure 20 includes a first flow channel The channel group 201, the connecting straight channel 202 and the second channel group 203 located on both sides of the first channel group 201 along the first direction X, the first channel group 201 is provided with an inlet 204 for the heat exchange medium to flow in, and the second channel group 203 The channel group 203 is provided with an outlet 205 for the heat exchange medium to flow out; the first channel group 201 includes a plurality of parallel first straight channels 206, and each first straight channel 206 connects the direct channel 202 with the second flow channel The channel groups 203 are connected in series, the second channel group 203 includes a plurality of parallel second direct channels 207, the first direct channel 206 and the second direct channel 207 respectively extend along the second direction Y, and the connecting direct channel 202 extends along the first direction X extends, and the first direction X and the second direction Y intersect.

The second runner group 203 is respectively located on both sides of the first runner group 201 along the first direction X, the first runner group 201 is provided with an inlet 204, and the second runner group 203 is provided with an outlet 205, so the inlet 204 and the outlet 205 are located at The same side of the board body 10.

The first flow channel group 201 includes a plurality of parallel first flow channels 206, and the second flow channel group 203 includes a plurality of parallel second flow channels 207. At this time, the plurality of first flow channels 206 and the plurality of second flow channels The direct-flow channels 207 are arranged at intervals along the first direction X, thereby increasing the heat exchange area between the plate body 10 and the battery and ensuring sufficient heat exchange between the plate body 10 and the battery; the number of the first direct-flow channels 206 and the second direct-flow channels 207 It can be determined according to the actual situation, and no specific limitation is made here.

Each first direct channel 206 is connected in series with the second channel group 203 by connecting the direct channel 202, that is, each first direct channel 206 can connect the direct channel 202 with all the first channel groups 203 in a second channel group 203 The two straight channels 207 are connected in series. Preferably, each first straight channel 206 can be connected in series with a few second straight channels 207 in a second channel group 203 by connecting the direct channels 202, so that the The flow distribution of the heat exchange medium is more even when flowing into the second flow channel 207 .

The second flow channel group 203 is located on both sides of the first flow channel group 201 along the first direction X. At this time, the heat exchange medium flowing in from the inlet 204 of the first flow channel group 201 can flow to the second channel on both sides through the connecting straight channel 202. The second flow channel group 203, compared with the second flow channel group 203 on the side of the first flow channel group 201, communicates with the first straight channel 206 and a side of the second flow channel group 203 far away from the first flow channel group 201. The length of the second straight channel 207 on the side connecting the straight channel 202 will be shortened to a large extent, thereby shortening the flow of the heat exchange medium in the flow channel, reducing the overall flow resistance of the heat exchange medium in the flow channel, and shortening the length of the heat exchange medium. The circulation time in the flow channel reduces the possibility of the heat exchange medium being completely vaporized in the flow channel, and improves the uniformity of heat exchange between the plate body 10 and the battery.

It can be understood that the straight path means that the flow path extends in a straight line, that is, the first straight path 206, the second straight path 207 and the connecting straight path 202 are all straight-line extending flow paths; the first straight path 206 and the second straight path 207 extend along the second direction Y, and the connecting straight path 202 extends along the first direction X, therefore, the heat exchange medium flows in the first straight path 206, the second straight path 207 and the connecting straight path 202 It is always in a straight-line flow state. Compared with the U-shaped flow channel set in the current heat exchange plate, the flow of the heat exchange medium in the flow channel of the application is shorter, and it may be completely volatilized into a gaseous state Therefore, the possibility of the heat exchange medium being completely vaporized in the flow channel can be reduced to a certain extent, and the uniformity of heat exchange between the plate body 10 and the battery can be improved.

The heat exchange device provided in this application includes a plate body 10 and a flow channel structure 20, the flow channel structure 20 is arranged on the plate body 10, and the flow channel structure 20 includes a first flow channel group 201, a connecting straight channel 202 and a second flow channel group 203 , the first flow channel group 201 is provided with an inlet 204 for the heat exchange medium to flow in, and the second flow channel group 203 is provided with an outlet 205 for the heat exchange medium to flow out; the first flow channel group 201 includes a plurality of parallel first straight channels 206 , each first flow path 206 is connected in series with the second flow path group 203 by connecting the flow path 202, and the second flow path group 203 is respectively located on both sides of the first flow path group 201 along the first direction X, relative to the first flow path group 203 On the same side of the channel group 201, the length of the connecting direct channel 202 connecting the first direct channel 206 and the second direct channel 207 is relatively short, and the second channel group 203 includes a plurality of parallel second direct channels 207 , the first straight channel 206 and the second straight channel 207 respectively extend along the second direction Y, and the connecting straight channel 202 extends along the first direction X, so that the heat exchange medium flowing in from the inlet 204 passes through the first straight channel 206 and The connecting straight channel 202 flows into a plurality of second straight channels 207, and finally flows to the outlet 205. At this time, while ensuring the heat exchange effect between the heat exchange medium and the battery, the heat exchange medium can be used in the first direct channel 206, Both the second straight channel 207 and the connecting straight channel 202 are in a straight-line flow state, and the flow is relatively short, which can reduce the possibility of the heat exchange medium being completely vaporized in the flow channel, and reduce the temperature difference in each area of the plate body 10, Improve the temperature uniformity of the heat exchange plate.

Optionally, each first direct channel 206 can be connected in series with two second direct channels 207 respectively by connecting the direct channel 202. It can be understood that the number of second direct channels 207 connected by one first direct channel 206 The less, the more uniform the flow distribution of the heat exchange medium in the first straight channel 206 flowing into the second straight channel 207, for example, when one first straight channel 206 is only connected to two second straight channels 207, The heat exchange medium in the first straight channel 206 can flow into the second straight channel 207 most uniformly, thereby improving the uniformity of heat exchange between the plate body 10 and the battery.

Optionally, each first direct current channel 206 is connected in series with three or four second direct current channels 207 respectively by connecting the direct current channel 202. It can be understood that in order to ensure sufficient heat exchange between the board body 10 and the battery, it is necessary to set A sufficient number of first direct current channels 206 and second direct current channels 207, wherein the adequate heat exchange between the plate body 10 and the battery is mainly ensured by setting a sufficient number of second direct current channels 207, therefore, each first direct current channel is provided The passage 206 is connected in series with three or four second passages 207 by connecting the passage 202, so that the flow of the heat exchange medium in the first passage 206 into the second passage 207 can be evenly distributed as much as possible, Ensure sufficient heat exchange between the board body 10 and the battery.

According to one aspect of the present application, the cross-sectional area of the first straight channel 206 along the first direction X, the cross-sectional area of the connecting straight channel 202 along the second direction Y, and the cross-sectional area of the second straight channel 207 along the first direction X The areas are each the same.

It can be understood that the cross-sectional area of the two flow channels is the same, the flow rate of the heat exchange medium per unit length of the two flow channels is the same, and the heat exchange area between the two flow channels and the battery is also the same, so the heat exchange The effect is also roughly the same.

In this embodiment, by setting the cross-sectional area of the first direct-flow channel 206 along the first direction X, the cross-sectional area of the connecting direct-flow channel 202 along the second direction Y, and the cross-sectional area of the second direct-flow channel 207 along the first direction X The cross-sectional area is the same, so that the flow rate of the heat exchange medium per unit length of the first direct passage 206, the second direct passage 207 and the connecting direct passage 202 is kept as consistent as possible. At this time, the heat exchange area of the three is the same as that of the battery, so that Make the heat exchange effect between the plate body 10 and the battery at the first direct path 206, the heat exchange effect between the plate body 10 and the battery at the second direct path 207, and the heat exchange between the plate body 10 and the battery at the connecting direct path 202 The effect is as consistent as possible, thereby reducing the possibility of uneven heat transfer to a certain extent.

FIG. 3 is a partial cross-sectional view of the first straight channel 206 along the first direction provided by some embodiments of the present application.

As shown in FIG. 3 , according to one aspect of the present application, the dimension L ₁ of the first straight channel 206 along the first direction X satisfies: 5 mm ≤ L ₁ ≤ 15 mm, and the dimension of the first straight channel 206 along the third direction Z L ₂ satisfies: 1mm≤L ₂ ≤3.5mm, the first direction X and the third direction Z are perpendicular.

When the heat exchange medium flows into the inlet 204, in order to ensure that the heat exchange medium is in a liquid state, it is necessary to set the heat exchange medium under a relatively high pressure environment condition. collapse, it is necessary to set the first flow path 206 to have sufficient compressive strength.

It can be understood that since the flow channel is a hollow structure, when the size of the flow channel in a certain direction is too large, its compressive strength will be reduced to a certain extent. Therefore, in this embodiment, by reasonably setting the first The size of the straight channel 206 ensures that there is a sufficient amount of heat exchange medium circulating in the first direct channel 206 to exchange heat with the battery, and at the same time, the compressive strength of the first direct channel 206 is in the optimal range, thereby avoiding Runner is crushed.

Further, the wall thickness of the flow channel may be about 1 mm, so that the flow channel has sufficient compressive strength to avoid being crushed.

Fig. 4 is another structural schematic diagram of a heat exchange device provided by some embodiments of the present application.

As shown in FIG. 4 , according to one aspect of the present application, the first flow channel group 201 further includes an inlet flow channel 208 extending along the second direction Y, and the inlet flow channel 208 includes a first flow section 209 and a plurality of parallel second flow sections 210 , the inlet 204 is set in the first flow section 209 , the first flow section 209 communicates with a plurality of second flow sections 210 respectively, and each second flow section 210 communicates with a plurality of first straight channels 206 respectively.

It can be understood that when the heat exchange medium in the upper flow channel flows into multiple lower flow channels, the more the number of the lower flow channels, the more difficult it is for the flow of the heat exchange medium to be evenly distributed. The smaller the number, the more even the flow distribution of the heat exchange medium.

Therefore, in this embodiment, by setting the inlet channel 208 to include the first flow section 209 and a plurality of parallel second flow sections 210, since the inlet 204 is located on the first flow section 209, and the first flow section 209 and the plurality of second flow sections The flow sections 210 are connected respectively, and each second flow section 210 is respectively connected with a plurality of first straight channels 206. At this time, the quantity of the first flow sections 209 is less than the quantity of the second flow sections 210, and the number of the second flow sections 210 The number is less than the number of the first straight-through channel 206, so that the distribution uniformity of the heat exchange medium is improved through the form of step-by-step shunting, thereby improving the temperature uniformity of each area of the plate body 10, and ensuring the heat exchange between the plate body 10 and the battery Effect.

Fig. 5 is an enlarged view of A-A in Fig. 4 .

As shown in Figure 5, according to one aspect of the present application, the second flow section 210 includes a first sub-flow section 211 and a plurality of parallel second sub-flow sections 212, the first sub-flow section 211 communicates with the first flow section 209, The first sub-flow section 211 communicates with a plurality of second sub-flow sections 212 respectively, and each second sub-flow section 212 communicates with a plurality of first straight-through channels 206 respectively.

In this embodiment, since the second flow section 210 includes a first sub-flow section 211 and a plurality of parallel second sub-flow sections 212, and the first sub-flow section 211 communicates with the first flow section 209, the first sub-flow section 211 communicates with a plurality of second sub-flow sections 212 respectively, and each second sub-flow section 212 communicates with a plurality of first straight-flow channels 206 respectively. At this time, the quantity of the first sub-flow sections 211 is less than that of the second sub-flow sections. The number of segments 212, the number of the second sub-flow segment 212 is less than that of the first flow segment 209, so that the uniformity of the heat exchange medium flowing into the first straight-through channel 206 is further improved through the form of step-by-step split flow, thereby improving the stability of the plate body 10. The temperature uniformity in each area ensures the heat exchange effect between the board body 10 and the battery.

Further, the number of first sub-flow sections 211 can be 2, the number of second sub-flow sections 212 can be 4, and each first sub-flow section 211 is respectively connected to 2 second sub-flow sections 212, so that The heat exchange medium located in the first flow section 209 can be evenly distributed to the two first sub-flow sections 211, and then distributed to the four second sub-flow sections 212, and flows from the second sub-flow sections 212 into the corresponding The first straight channel 206 is used to distribute the flow of the heat exchange medium in a manner of dividing into two equal stages step by step, so as to further improve the distribution uniformity of the heat exchange medium.

Further, the number of first straight channels 206 can be 8, and each second sub-flow section 212 is respectively connected with two first straight channels 206, so that the inflow from the inlet 204 The heat exchange medium evenly flows into the first flow channel 206, so as to further improve the distribution uniformity of the heat exchange medium.

According to one aspect of the present application, the cross-sectional area of the first flow section 209 along the first direction X and the cross-sectional area of the second flow section 210 along the first direction X are the same.

In this embodiment, the cross-sectional area of the first flow section 209 along the first direction X and the cross-sectional area of the second flow section 210 along the first direction X are the same, so in unit length, the heat exchange in the first flow section 209 The flow rate of the medium is the same as that of the heat exchange medium in the second flow section 210, thereby avoiding the heat exchange effect between the plate body 10 and the battery at the first flow section 209 and the heat exchange effect between the plate body 10 and the battery at the second flow section 210. The phenomenon of uneven heat transfer caused by different heat transfer effects.

Please continue to refer to FIG. 5 , according to one aspect of the present application, the second flow channel group 203 further includes an outlet flow channel 213, and the outlet flow channel 213 includes a third flow section 214 and a fourth flow section 215 that communicate with each other. The third flow section 214 extends along the first direction X, the fourth flow section 215 extends along the second direction Y, the outlet 205 is arranged in the fourth flow section 215, and each second straight channel 207 in the second flow channel group 203 passes through the third flow section 214 communicates with the fourth flow section 215 .

Since the outlet 205 of the heat exchange medium is located in the second channel group 203, and the second channel group 203 includes a plurality of parallel second straight channels 207, each second straight channel 207 needs to communicate with the outlet 205, so that The heat exchange medium flows out. At this time, the overall length of the second straight channel 207 in the second flow channel group 203 is longer, the overall flow resistance is large, and the circulation time of the heat exchange medium in the flow channel is longer, so it is completely absorbed in the flow channel The possibility of gasification is relatively high, and it is likely to cause uneven temperature distribution in various regions of the plate body 10 and uneven heat exchange with the battery.

In this embodiment, by setting the outlet channel 213, the outlet channel 213 includes a third flow section 214 and a fourth flow section 215 that communicate with each other, the third flow section 214 extends along the first direction X, and the fourth flow section 215 Extending along the second direction Y, the outlet 205 is arranged in the fourth flow section 215, and each second straight passage 207 in the second flow passage group 203 communicates with the fourth flow section 215 through the third flow section 214, so that the The heat exchange medium in the second straight passage 207 can flow to the outlet 205 through the third flow section 214 and the fourth flow section 215, shortening the length of the second straight passage 207 to a certain extent, reducing the flow resistance of the second straight passage 207, reducing The time for the heat exchange medium to circulate in the flow channel further reduces the possibility of the heat exchange medium being completely vaporized in the second flow channel 207, improves the uniformity of the temperature distribution of the plate body 10 to a certain extent, and ensures that the plate body 10 and The heat exchange effect of the battery.

According to an aspect of the present application, a relief portion is formed on a side of the panel body 10 that is not provided with the inlet 204 and the outlet 205 .

When the heat exchange device is arranged in the battery pack, since there are many other structures in the battery pack, such as battery cells, explosion-proof valves, etc., there may be mutual interference with the heat exchange device.

In this embodiment, a relief portion is formed on the side of the board body 10 that is not provided with the inlet 204 and the outlet 205 to make way for other structures of the battery pack, thereby avoiding the interference between the board body 10 and other structures in the battery pack. Interfering with each other can cause damage.

Another aspect of the present application also provides a battery pack, including a box body, a battery assembly, and the heat exchange device as described in any one of the above, the battery assembly is arranged in the box, the heat exchange device is arranged in the box, and the heat exchange device The board body 10 is attached to the battery pack.

Another aspect of the present application also provides a vehicle, including an air-conditioning system and the above-mentioned battery pack, where the inlet 204 of the heat exchange device in the battery pack communicates with the medium channel of the air-conditioning system.

In the heat exchange device, battery pack and vehicle provided in this application, the heat exchange device includes a plate body 10 and a flow channel structure 20, the flow channel structure 20 is arranged on the plate body 10, and the flow channel structure 20 includes a first flow channel group 201, a connecting straight channel 202 and the second channel group 203, the first channel group 201 is provided with an inlet 204 for the heat exchange medium to flow in, and the second channel group 203 is provided with an outlet 205 for the heat exchange medium to flow out; the first channel group 201 includes a plurality of The first straight channels 206 connected in parallel, each first straight channel 206 is connected in series with the second flow channel group 203 by connecting the direct channel 202, and the second flow channel groups 203 are respectively located in the first direction X of the first flow channel group 201 On both sides, compared with the same side located in the first flow channel group 201, the length of the connecting straight channel 202 connecting the first straight channel 206 and the second straight channel 207 is shorter, and the second flow channel group 203 includes multiple A parallel second straight channel 207, the first straight channel 206 and the second straight channel 207 extend along the second direction Y respectively, and the connecting straight channel 202 extends along the first direction X, so that the heat exchange medium flowing in from the inlet 204 It flows into a plurality of second straight channels 207 through the first straight channel 206 and the connecting direct channel 202, and finally flows to the outlet 205. At this time, while ensuring the heat exchange effect between the heat exchange medium and the battery, the heat exchange medium can The first straight channel 206, the second straight channel 207 and the connecting straight channel 202 are all in a straight line flow state, and the flow is relatively short, which can reduce the possibility of the heat exchange medium being completely vaporized in the flow channel and reduce the plate body. The temperature difference of each area of 10 improves the temperature uniformity of the heat exchange plate.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Moreover, the term "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed, Or also include elements inherent in such a process, method, article or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (10)

1. A heat exchange device, characterized in that, comprising: board body; The flow channel structure is arranged on the plate body, and the flow channel structure includes a first flow channel group, a connecting straight channel and a second flow channel group respectively located on both sides of the first flow channel group along the first direction. The first channel group is provided with an inlet for the heat exchange medium to flow in, and the second channel group is provided with an outlet for the heat exchange medium to flow out; The first flow path group includes a plurality of parallel first flow paths, each of the first flow path groups is connected in series with the second flow path group through the connecting flow path, and the second flow path group includes A plurality of parallel second direct current channels, the first direct current channel and the second direct current channel respectively extend along the second direction, the connecting direct current channel extends along the first direction, the first direction and the The above-mentioned second direction intersection setting. 2. The heat exchange device according to claim 1, characterized in that, the cross-sectional area of the first straight-flow path along the first direction, the cross-sectional area of the connecting straight-flow path along the second direction And the cross-sectional areas of the second straight channels along the first direction are respectively the same. 3. The heat exchange device according to claim 2, characterized in that, the dimension L ₁ of the first flow path along the first direction satisfies: 5mm≤L ₁ ≤15mm, the first flow path The dimension L ₂ along the third direction satisfies: 1mm≦L ₂ ≦3.5mm, and the first direction is perpendicular to the third direction. 4. The heat exchange device according to claim 1, wherein the first flow channel group further includes an inlet flow channel extending along the second direction, and the inlet flow channel includes a first flow section and a plurality of parallel The second flow section, the inlet is arranged in the first flow section, the first flow section communicates with a plurality of the second flow sections, each of the second flow sections communicates with a plurality of the first straight The flow channels are respectively connected. 5. The heat exchange device according to claim 4, characterized in that, the second flow section comprises a first sub-flow section and a plurality of parallel second sub-flow sections, the first sub-flow section and the The first flow section is in communication, the first sub-flow section is in communication with a plurality of the second sub-flow sections, and each of the second sub-flow sections is in communication with a plurality of the first straight channels. 6. The heat exchange device according to claim 4, wherein the cross-sectional area of the first flow section along the first direction is the same as the cross-sectional area of the second flow section along the first direction . 7. The heat exchange device according to any one of claims 1-6, characterized in that, the second flow channel group further includes an outlet flow channel, and the outlet flow channel includes a third flow section and a second flow section that communicate with each other. Four flow sections, the third flow section extends along the first direction, the fourth flow section extends along the second direction, the outlet is arranged in the fourth flow section, and the second flow passage Each of the second flow channels in the group communicates with the fourth flow section through the third flow section. 8 . The heat exchange device according to any one of claims 1 to 6 , wherein a relief portion is formed on a side of the plate body that is not provided with the inlet and the outlet. 9. A battery pack, characterized in that it comprises: box; a battery assembly arranged in the box; The heat exchange device according to any one of claims 1 to 8, which is arranged in the box, and the plate body of the heat exchange device is bonded to the battery assembly. 10. A vehicle, characterized by comprising an air-conditioning system and the battery pack according to claim 9, wherein the inlet of the heat exchange device in the battery pack communicates with the medium channel of the air-conditioning system.

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