CN217788542U - Heat exchanger of power battery, battery pack and vehicle - Google Patents

Abstract

The utility model relates to a heat exchanger, battery package and vehicle of power battery, this heat exchanger includes shunt tubes subassembly, afterbody collecting pipe, joint and a plurality of mouth organ pipes; the harmonica tubes comprise a first end and a second end which are opposite, and the second ends of the harmonica tubes are communicated through the tail collecting tube; the flow dividing pipe assembly comprises a first-stage flow dividing pipe, a second-stage flow dividing pipe, a first-stage collecting pipe and a second-stage collecting pipe; the inlet of the joint is communicated with the middle part of the first-stage shunt pipe, two ends of the first-stage shunt pipe are respectively communicated with the second-stage shunt pipe, and the second-stage shunt pipe is communicated with the first end of part of harmonica tubes; the export of joint and the middle part intercommunication of one-level collecting pipe, the both ends of one-level collecting pipe respectively with second grade collecting pipe intercommunication, the first end intercommunication of second grade collecting pipe and another part mouth organ pipe. Through setting up one-level reposition of redundant personnel and second grade reposition of redundant personnel to realize the refrigerant and get into and the exhaust evenly distributed, thereby avoid because of cold volume maldistribution, cause adverse effect to power battery life-span and reliability.

Description

Heat exchanger of power battery, battery pack and vehicle

Technical Field

The utility model relates to a power battery technical field, specifically, relate to a power battery's heat exchanger, battery package and vehicle.

Background

The power battery is used as a main power source of the new energy automobile, and in order to ensure the normal use of the battery, the battery needs to be cooled and heated, so that the safety and the service life of the battery are improved.

The harmonica type direct cooling plate is used as a cooling and heating mode of a battery, and the adopted shunting mode is generally as follows: the two ends of the harmonica tubes arranged in a row are communicated through a shunt tube respectively, refrigerant enters from one end of one shunt tube and flows sequentially along the length direction of the shunt tube, the refrigerant enters different harmonica tubes in sequence and finally converges in the other harmonica tube, the refrigerant is discharged from the tail end of the harmonica tube, and when the shunt tube shunts to each harmonica tube, obvious shunt unevenness can occur. The reason is that the shunt tubes and the parallel harmonica tubes are sequentially arranged along the refrigerant, so that the flow of the harmonica tubes at the front end is high, the flow of the harmonica tubes at the rear end is low, the cold quantity of the cold plate is finally distributed unevenly, and the service life and the reliability of the power battery are adversely affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power battery's heat exchanger, battery package and vehicle, this heat exchanger is through setting up one-level shunt tubes, second grade shunt tubes, one-level collecting pipe and second grade collecting pipe to realize that the refrigerant gets into and exhaust evenly distributed, thereby avoid because of cold volume maldistribution, cause adverse effect to power battery life-span and reliability.

In order to achieve the above object, in a first aspect of the present disclosure, there is provided a heat exchanger for a power battery, the heat exchanger including a shunt tube assembly, a tail bus tube, a connector, and a plurality of harmonica tubes; the harmonica tubes are arranged between the shunt tube assembly and the tail collecting tube and comprise opposite first ends and second ends, and the second ends of the harmonica tubes are communicated through the tail collecting tube;

the flow dividing pipe assembly comprises a first-stage flow dividing pipe, a second-stage flow dividing pipe, a first-stage collecting pipe and a second-stage collecting pipe; the connector is arranged at the plurality of harmonica tubes and the first end, the inlet of the connector is communicated with the middle part of the first-stage shunt tube, two ends of the first-stage shunt tube are respectively communicated with the second-stage shunt tube, and the second-stage shunt tube is communicated with the first end of part of the harmonica tubes;

the outlet of the joint is communicated with the middle of the first-stage collecting pipe, two ends of the first-stage collecting pipe are communicated with the second-stage collecting pipe respectively, and the second-stage collecting pipe is communicated with the first end of the harmonica pipe.

Optionally, the harmonica tube extends in a first direction, the secondary shunt tube and the secondary bus tube extend in a second direction, and the first direction is perpendicular to the second direction.

Optionally, the first end of the harmonica pipe is bent downwards to form a bent portion, the bent portion is inserted into the second-stage shunt pipe and/or the second-stage bus pipe for a preset distance, and the bent portion is welded and fixed with the second-stage shunt pipe and/or the second-stage bus pipe.

Optionally, the harmonica pipe comprises a plurality of micro-channels for cooling fluid to flow through, and the extension direction of the micro-channels is perpendicular to the extension direction of the secondary shunt pipe and/or the secondary collecting pipe.

Optionally, the number of the harmonica tubes is eight, and the harmonica tubes are arranged at intervals along the second direction,

the number of the secondary flow dividing pipes and the number of the secondary collecting pipes are two;

in the second direction, the eight harmonica tubes are sequentially a pipe fitting I, a pipe fitting II, a pipe fitting III, a pipe fitting IV, a pipe fitting V, a pipe fitting VI, a pipe fitting VII and a pipe fitting VIII along the second direction; the first pipe fitting and the fourth pipe fitting are communicated through one second-stage shunt pipe, the fifth pipe fitting and the eighth pipe fitting are communicated through the other second-stage shunt pipe, and two ends of the first-stage shunt pipe are respectively communicated with the middle parts of the two second-stage shunt pipes; the two ends of the first-stage collecting pipe are respectively connected to the middle parts of the two second-stage collecting pipes.

Optionally, a spacer is arranged in the middle of the tail collecting pipe and used for dividing the tail collecting pipe into a first pipeline and a second pipeline, wherein the first pipeline is communicated with the first pipe fitting, the second pipe fitting, the third pipe fitting and the fourth pipe fitting respectively;

the second pipeline is respectively communicated with the fifth pipe fitting, the sixth pipe fitting, the seventh pipe fitting and the eighth pipe fitting.

Optionally, a plurality of temperature equalization plates are fixedly connected below the harmonica tubes.

Optionally, on the length direction of harmonica pipe, the both ends of temperature-uniforming plate are connected with a gasket respectively, the gasket is along the perpendicular to the length direction of harmonica pipe extends, just keeping away from of gasket the one end of temperature-uniforming plate is formed with the arc portion of upwards buckling.

In a second aspect of the present disclosure, a battery pack is further provided, where the battery pack includes a power battery, and the battery pack further includes the above-mentioned heat exchanger for the power battery, where the heat exchanger is used for cooling or heating the power battery.

In a third aspect of the present disclosure, a vehicle is also provided, which includes the battery pack described above.

Through the technical scheme, the heat exchanger of power battery of this disclosure promptly, the second end of a plurality of harmonica pipes passes through the afterbody collecting pipe intercommunication, the first end of a part of harmonica pipes passes through second grade shunt tubes intercommunication, the first end of another part of harmonica pipes passes through second grade collecting pipe intercommunication, the both ends of one-level shunt tubes communicate with second grade shunt tubes respectively, the both ends of one-level collecting pipe communicate with second grade collecting pipe respectively, the joint is located the first end of a plurality of harmonica pipes, and the import of joint communicates with the middle part of one-level shunt tubes, the export of joint communicates with the middle part of one-level collecting pipe, the coolant way of import advances one-level shunt tubes first-day, then to the reposition of redundant personnel entering second grade shunt tubes to both sides, get into by the first end of a part of harmonica pipes again, after the coolant collects to afterbody collecting pipe, get into the harmonica by the second end of another part of harmonica pipe, and collect to second grade collecting pipe, then get into the one-level collecting pipe by the both ends of one-level collecting pipe, finally discharge by the export of joint. This heat exchanger sets up one-level shunt tubes, second grade shunt tubes, one-level collecting pipe and second grade collecting pipe through the first end at a plurality of harmonica pipes to make the refrigerant can realize even reposition of redundant personnel and the distribution of converging when getting into harmonica pipe and discharge harmonica pipe, thereby avoid causing cold volume maldistribution because of the reposition of redundant personnel is uneven, influence power battery life-span and reliability.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a heat exchanger of a power battery provided by some embodiments of the present disclosure;

fig. 2 is a partially enlarged view of a heat exchanger based on the power cell of fig. 1;

fig. 3 is an exploded view of a heat exchanger of a power cell provided in some embodiments of the present disclosure;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a schematic view illustrating a connection structure between a first end of a harmonica pipe and a two-stage shunt pipe of a heat exchanger of a power battery according to some embodiments of the present disclosure;

fig. 6 is a schematic end view of a first end and a second end of a harmonica tube of a heat exchanger of a power battery according to some embodiments of the present disclosure;

fig. 7 is a schematic structural diagram of a joint of a heat exchanger of a power battery provided by some embodiments of the present disclosure;

fig. 8 is a schematic structural diagram of a gasket of a heat exchanger of a power battery provided by some embodiments of the present disclosure;

FIG. 9 is a histogram of power cell heat exchanger flow distribution provided by some embodiments of the present disclosure;

fig. 10 is a simulated cloud plot of pressure drop across a power cell heat exchanger provided in some embodiments of the present disclosure.

Description of the reference numerals

100-a shunt tube assembly; 110-first order shunt tubes; 120-secondary shunt tube; 130-primary collecting pipe; 140-a secondary collector pipe; 150-connecting tube;

200-tail collector tubes; 210-pipe one; 220-pipeline two; 230-a spacer;

300-a linker; 301-an inlet; 302-an outlet; 303-liquid inlet; 304-a liquid outlet;

400-harmonica tube; 400 a-pipe fitting one; 400 b-pipe two; 400 c-pipe fitting III; 400 d-pipe fitting IV; 400 e-pipe fitting five; 400 f-pipe six; 400 g-pipe seventh; 400 h-eight pipe fittings; 401-a first end; 402-a second end; 4001-a microchannel; 410-bending part;

500-temperature-uniforming plate; 600-pad.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, use of directional words such as "upper, lower, left, right" generally refers to the upper, lower, left, right, and so on, of the accompanying drawings; "inner and outer" means "inner and outer" with respect to the profile of the corresponding component itself; "X" in the drawings refers to a first direction, i.e., the length direction of the harmonica tube; "Y" in the drawings means a second direction perpendicular to the first direction, i.e., perpendicular to the length direction of the harmonica tube. In addition, the terms "first," "second," "third," "fourth," and the like as used herein are intended to distinguish one element from another, and are not necessarily sequential or significant. Moreover, in the following description, when referring to the figures, the same reference numbers in different figures represent the same or similar elements unless otherwise explained. The foregoing definitions are provided to illustrate and describe the present disclosure only and should not be construed to limit the present disclosure.

As shown in fig. 1 to 10, in order to achieve the above object, in a first aspect of the present disclosure, there is provided a heat exchanger for a power battery, the heat exchanger including a shunt tube assembly 100, a tail manifold 200, a junction 300, and a plurality of harmonica tubes 400; a plurality of harmonica tubes 400 are disposed between the shunt tube assembly 100 and the tail manifold 200, the harmonica tubes 400 including first and second opposing ends 401, 402, the second ends 402 of the plurality of harmonica tubes 400 being in communication through the tail manifold 200; the shunt tube assembly 100 includes a primary shunt tube 110, a secondary shunt tube 120, a primary manifold 130, and a secondary manifold 140; the connector 300 is arranged on the plurality of harmonica tubes 400 and the first ends 401, the connector 300 is positioned in the middle of the shunt tube assembly 100, the inlet 301 of the connector 300 is communicated with the middle of the first-stage shunt tube 110, two ends of the first-stage shunt tube 110 are respectively communicated with the second-stage shunt tube 120, and the second-stage shunt tube 120 is communicated with the first ends 401 of part of the harmonica tubes 400; the outlet 302 of the joint 300 is communicated with the middle part of the first-stage collecting pipe 130, two ends of the first-stage collecting pipe 130 are respectively communicated with the second-stage collecting pipes 140, and the second-stage collecting pipes 140 are communicated with the first ends 401 of the other part of harmonica-shaped pipes 400.

Through the above technical scheme, that is, the heat exchanger of the power battery of the present disclosure, the second ends 402 of the plurality of harmonica tubes 400 are communicated through the tail manifold 200, the first ends 401 of a part of harmonica tubes 400 are communicated through the second-stage shunt tubes 120, the first ends 401 of another part of harmonica tubes 400 are communicated through the second-stage manifold 140, both ends of the first-stage shunt tubes 110 are respectively communicated with the second-stage shunt tubes 120, both ends of the first-stage manifold 130 are respectively communicated with the second-stage manifold 140, the joint 300 is disposed at the plurality of harmonica tubes 400 and the first ends 401, the joint 300 is located at the middle position of the shunt tube assembly 100, the inlet 301 of the joint 300 is communicated with the middle of the first-stage shunt tubes 110, the outlet 302 of the joint 300 is communicated with the middle of the first-stage manifold 130, the coolant channel of the inlet 301 firstly enters the first-stage shunt tubes 110, then shunts to both sides to enter the second-stage shunt tubes 120, then enters from the first ends 401 of a part of the harmonica tubes 400, after the coolant is collected to the tail manifold 200, the second ends 402 of another part of the harmonica tubes 400 enter the last manifold 130, and then exit from the first-stage manifold 300. This heat exchanger is through setting up one-level shunt tubes 110, second grade shunt tubes 120, one-level collecting pipe 130 and second grade collecting pipe 140 at the first end 401 of a plurality of harmonica pipes 400 to make the refrigerant can realize even reposition of redundant personnel and the distribution of converging when getting into harmonica pipe 400 and discharge port 302 musical instrument pipe, thereby avoid causing cold volume maldistribution because of the reposition of redundant personnel is uneven, influence power battery life-span and reliability.

In some embodiments, the harmonica tubes 400 extend in a first direction X, and the secondary shunt tubes 120 and the secondary manifold 140 extend in a second direction Y, the first direction X being perpendicular to the second direction Y. It should be noted that, in other embodiments, the first direction X may also form an included angle with the second direction Y, and the specific angle is selected, and those skilled in the art may design according to actual needs, and details are not described here.

In order to accommodate the power cell, the first ends 401 of the plurality of harmonica tubes 400 are bent downward so that the shunt tube assembly 100 can be positioned at one side of the power cell and the space in the vertical direction is saved, but the harmonica tubes 400 need to be welded to the respective pipe fittings in the shunt tube assembly 100, and the bent structure is usually a soldered connection, and the brazing flux is liable to flow downward by gravity to the vicinity of the ends of the micro channels 4001 of the harmonica tubes 400, which increases the risk of solder blocking (i.e., the brazing flux blocks the micro channels 4001).

In order to alleviate the blockage of the micro channel 4001 by solder (e.g., solder) during the soldering process, as shown in fig. 3, 4 and 5, in some embodiments, the first end 401 of the harmonica tube 400 is bent downward to form a bent portion 410, and the bent portion 410 is inserted into the secondary shunt tube 120 and/or the secondary manifold 140 by a predetermined distance and fixed by soldering. The first end 401 of the harmonica tube 400 is bent downwards by a certain bending angle, the two-stage shunt tube 120 and/or the two-stage manifold 140 are inserted into the harmonica tube 400 by a certain length, and the harmonica tube 400 is welded with the two-stage shunt tube 120 and/or the two-stage manifold 140 through brazing flux, so that the problem of welding blockage can be effectively avoided. In addition, through inserting the distance of predetermineeing of second grade shunt tubes 120 and second grade collecting pipe 140 to the coolant for inside second grade shunt tubes 120 and second grade collecting pipe 140 shunts after reaching a certain amount, can also improve the reposition of redundant personnel homogeneity of the inside coolant of a plurality of harmonica pipes 400 on a certain distance, further improve the evenly distributed of cold volume.

It should be noted that the second ends 402 of the plurality of harmonica tubes 400 are not bent and directly connected to the tail bus pipe 200, which may speed up the production cycle to some extent.

In some embodiments, a bar-shaped hole matched with the shape and size of the first end 401 of the harmonica pipe 400 may be provided at the lateral side of the secondary shunt pipe 120 and the secondary manifold 140 to allow the bent portion 410 to be inserted therein and then connected thereto by soldering.

The harmonica tube 400 may be constructed in any suitable manner, as shown in fig. 5 and 6, and in some embodiments of the present disclosure, the harmonica tube 400 includes a plurality of micro channels 4001 through which a cooling fluid flows, a first end 401 of the harmonica tube 400 extends into the inside of the secondary shunt tubes 120 and/or the secondary manifold 140 by a predetermined distance, and an extending direction of the micro channels 4001 is perpendicular to an extending direction of the secondary shunt tubes 120 and/or the secondary manifold 140. The first end 401 of the harmonica pipe 400 is inserted into the second-stage shunt pipe 120 and/or the second-stage manifold 140, the normal direction of the microchannel 4001 at the end face of the first end 401 is perpendicular to the extending direction of the second-stage shunt pipe 120 and/or the second-stage manifold 140, that is, the flowing direction of the coolant in the second-stage shunt pipe 120 is perpendicular to the extending direction of the microchannel 4001 at the first end 401 of the harmonica pipe 400, the coolant in the second-stage shunt pipe 120 is prevented from flowing into the harmonica pipe 400 along the flowing direction of the coolant, and the uniformity of shunting is greatly improved.

Wherein, the specific size and structure of the micro channel 4001 can be designed with reference to the related art, it can be understood that the micro channel 4001 can be configured as a plurality of through holes spaced along the width direction of the harmonica pipe 400, which can penetrate the first end 401 and the second end 402 of the harmonica pipe 400, and the refrigerant passes through the plurality of micro channels 4001 to achieve a better cooling or heating function.

In the related art, the width of the harmonica tube 400 is 49.5mm, and the area of the temperature equalization plate 500 uncovered by the harmonica tube 400 is large. Therefore, the cooling capacity is relatively limited, when the charging and discharging multiplying power is improved, the cooling and heating capacities of the battery are insufficient, and the temperature difference of the power battery is enlarged. In the present disclosure, the harmonica tube 400 used may have a width of 50-55mm. Wherein, harmonica pipe 400 width can be 52.3mm, and the flow of unit length harmonica pipe 400 has increased 26.7%, and heat transfer capacity further strengthens, through set up temperature-uniforming plate 500 in harmonica pipe 400 below, temperature-uniforming plate 500 is through brazing and the lower surface welding of eight flat pipes of harmonica, and heat transfer is faster, and cold/heat distribution is more even.

As shown in fig. 1 and 2, in some embodiments of the present disclosure, the number of harmonica tubes 400 is eight, the harmonica tubes extend along the first direction and are arranged at intervals along the second direction Y, and the number of the secondary shunt tubes 120 and the secondary collecting tube 140 is two; in the second direction Y, the eight harmonica tubes 400 are a first tube 400a, a second tube 400b, a third tube 400c, a fourth tube 400d, a fifth tube 400e, a sixth tube 400f, a seventh tube 400g and an eighth tube 400h in sequence along the second direction Y; the first pipe 400a is communicated with the fourth pipe 400d through one second-stage shunt pipe 120, the fifth pipe 400e is communicated with the eighth pipe 400h through the other second-stage shunt pipe 120, and two ends of the first-stage shunt pipe 110 are respectively communicated with the middle parts of the two second-stage shunt pipes 120; both ends of the first-stage manifold 130 are connected to the middle portions of the two second-stage manifolds 140, respectively.

As shown in fig. 2, the eight harmonica tubes 400 are, in the second direction Y, a first tube 400a, a second tube 400b, a third tube 400c, a fourth tube 400d, a fifth tube 400e, a sixth tube 400f, a seventh tube 400g, and an eighth tube 400h; the first pipe 400a and the second pipe 400h are located on the outermost sides, the fourth pipe 400d and the fifth pipe 400e are located on the middlest sides, the second pipe 400b and the third pipe 400c are located between the first pipe 400a and the fourth pipe 400d, the sixth pipe 400f and the seventh pipe 400g are located between the fifth pipe 400e and the eighth pipe 400h, the two secondary manifolds 140 are arranged, the first pipe 400a, the second pipe 400b, the third pipe 400c, the fourth pipe 400d, the fifth pipe 400e, the sixth pipe 400f, the seventh pipe 400g and the second end 402 of the eighth pipe 400h are all communicated through the tail manifold 200, one secondary manifold 140 is arranged at the first ends 401 of the second pipe 400b and the third pipe 400c and is respectively communicated with the second pipe 400b and the third pipe 400c, the other secondary manifold 140 is arranged at the first ends 401 of the sixth pipe 400f and the seventh pipe 400g and is respectively communicated with the sixth pipe 400f and the seventh pipe 400g, the two ends of the primary manifold 130 are respectively communicated with the middle position of the two secondary manifolds 140, and the outlet 302 of the joint 300 is communicated with the middle position of the manifold 130; the refrigerant flowing out of the second pipe 400b, the third pipe 400c, the sixth pipe 400f and the seventh pipe 400g can be uniformly collected to the first-stage collecting pipe 130 by the two second-stage collecting pipes 140 and flows to the outlet 302 of the joint 300, so that the pressure drop inside the harmonica pipes 400 can be reduced; the second-stage shunt tubes 120 are arranged at the first ends 401 of the first pipe fitting 400a, the fourth pipe fitting 400d, the fifth pipe fitting 400e and the eighth pipe fitting 400h and are respectively communicated with the first pipe fitting 400a, the fourth pipe fitting 400d, the fifth pipe fitting 400e and the eighth pipe fitting 400h, two ends of the first-stage shunt tubes 110 are respectively connected with the middle positions of the second-stage shunt tubes 120, the middle positions of the first pipe fitting 400a and the fourth pipe fitting 400d and the middle positions of the fifth pipe fitting 400e and the eighth pipe fitting 400h, and the inlets 301 of the joints 300 are communicated with the middle positions of the first-stage shunt tubes 110, so that the coolant flowing out of one end of the first-stage shunt tubes 110 can be uniformly shunted to the first pipe fitting 400a and the fourth pipe fitting 400d, the coolant flowing out of the other ends can be uniformly shunted to the fifth pipe fitting 400e and the eighth pipe fitting 400h, and the shunting uniformity is further improved.

In some embodiments, the connector 300 is disposed at the first end 401 of the plurality of harmonica tubes 400 and at a middle position of the plurality of harmonica tubes 400 in the second direction, the inlet 301 of the connector 300 is communicated with a middle position of the primary shunt tube 110 through a connection tube 150, and the outlet 302 of the connector 300 is communicated with a middle position of the primary manifold 130 through a connection tube 150. Wherein, the joint 300 further comprises a liquid inlet 303 communicated with the inlet 301 and a liquid outlet 304 communicated with the outlet 302, one end of a connecting pipe 150 is communicated with the liquid inlet 303, and the other end is communicated with the middle position of the first-stage shunt pipe 110; one end of the other connecting pipe 150 is communicated with the liquid outlet 304, and the other end is communicated with the middle position of the primary collecting pipe 130, so as to uniformly distribute the cooling liquid entering from the inlet 301 of the joint 300 to the secondary flow-dividing pipe 120; meanwhile, the coolant in the secondary manifold 140 may be discharged from the outlet 302 of the joint 300 after being merged. In other embodiments, the primary dividing tube 110 and the primary collecting tube 130 may each include two tube segments, the inlet 303 of the joint 300 is connected with a connecting tube 150, and the connecting tube 150 and the two tube segments forming the primary dividing tube 110 are communicated with each other through a tee; the outlet 304 of the connector 300 is connected to a connecting pipe 150, and the connecting pipe 150 and two pipe segments forming the primary manifold 130 can be communicated with each other through a tee, so that the connector 300 is communicated with the primary shunt pipe 110 and the primary manifold 130.

It should be noted that the spacing distances between the eight harmonica tubes 400 are the same, and of course, different structural forms may be provided according to the needs, all of which are within the protection scope of the present disclosure.

The aft manifold 200 may be constructed in any suitable manner, for example, it may be a pipe with a pipe in the middle and sealed at both ends. To avoid mixing and flow unevenness of the harmonica pipes 400, as shown in fig. 1 and 3, in some embodiments of the present disclosure, a spacer 230 is disposed in a middle portion of the tail manifold 200, and the spacer 230 is used to divide the tail manifold 200 into a first pipe 210 and a second pipe 220, wherein the first pipe 210 communicates with the second ends (i.e., the ends far away from the flow dividing pipe assembly 100) of the first pipe 400a, the second pipe 400b, the third pipe 400c and the fourth pipe 400 d; conduit two 220 communicates with the second ends (i.e., the ends distal from shunt tube assembly 100) of tube five 400e, tube six 400f, tube seven 400g, and tube eight 400h. The refrigerant entering the first pipeline 210 through the first and fourth pipes 400a and 400d can only flow back to one of the secondary collecting pipes 140 through the second and third pipes 400b and 400c, and the refrigerant entering the second pipeline 220 through the fifth and eighth pipes 400e and 400h can only flow back to the other secondary collecting pipe 140 through the sixth and seventh pipes 400f and 400g, so that the flow mixing and the flow loop unevenness of the left and right flow channels can be effectively avoided.

The details of the operation of the heater are as follows:

in the direct cooling mode, after entering from the inlet 301 of the joint 300, the refrigerant is divided into left and right parts along the first-stage shunt tube 110, and then flows into the two second-stage shunt tubes 120 vertically and upwardly, wherein the refrigerant in one second-stage shunt tube 120 flows into the first tube 400a and the fourth tube 400d, the refrigerant in the other second-stage shunt tube 120 flows into the fifth tube 400e and the eighth tube 400h, the refrigerant in the first tube 400a and the fourth tube 400d reaches the first tube 210 of the tail confluence tube 200, and then flows into the second tube 400b and the third tube 400c, and similarly, the refrigerant in the fifth tube 400e and the eighth tube 400h reaches the second tube 220 of the tail confluence tube 200, and then flows into the sixth tube 400f and the seventh tube 400g, and the first tube 210 and the second tube 220 of the tail confluence tube 200 are separated by the spacer 230 disposed at the middle position of the tail confluence tube 200. The refrigerants flowing out of the first ends 401 of the second pipe 400b, the third pipe 400c, the sixth pipe 400f and the seventh pipe 400g respectively enter the two secondary collecting pipes 140, are converged by the primary collecting pipe 130, and then flow out of the outlet 302 of the joint 300 along the pipeline; in the direct heating mode, after entering from the outlet 302 of the joint 300, the refrigerant is divided into left and right parts along the primary collecting pipe 130, and then flows into the two secondary collecting pipes 140 vertically and upwardly, wherein the refrigerant in one secondary collecting pipe 140 flows into the pipe two 400b and the pipe three 400c at the same time, the refrigerant in the other secondary collecting pipe 140 flows into the pipe six 400f and the pipe seven 400g, and the refrigerant in the pipe two 400b and the pipe three 400c reaches the pipe one 210 of the tail collecting pipe 200 and then flows into the pipe one 400a and the pipe four 400d again, and similarly, the refrigerant in the pipe six 400f and the pipe seven 400g reaches the pipe two 220 of the tail collecting pipe 200 and then flows into the pipe five 400e and the pipe 400 eight h. The refrigerants flowing out of the first pipe 400a and the fourth pipe 400d enter one of the two-stage shunt pipes 120, the refrigerants flowing out of the fifth pipe 400e and the eighth pipe 400h enter the other two-stage shunt pipe 120, converge through the first-stage shunt pipe 110, and then flow out of the medium inlet 301 of the joint 300 along the pipeline.

In the related art, in order to meet the heat exchange requirement, 15 harmonica tubes 400 are adopted on the direct cooling plate, so that the material cost is high. The eight harmonica tubes 400 are adopted in the embodiment of the disclosure, so that the heat exchange requirement can be met, the innovation of the primary shunting structure through the primary shunting tubes 110 and the primary collecting tubes 130 and the secondary shunting structure through the secondary shunting tubes 120 and the secondary collecting tubes 140 is mainly realized, meanwhile, the refrigerant flow direction in the secondary shunting tubes 120 and the secondary collecting tubes 140 is set to be perpendicular to the normal direction of the micro-channels 4001 of the harmonica tubes 400 at the first end 401, the pressure drop is reduced, the shunting uniformity is greatly improved, and the flow deviation of each flow channel is within 0.3%. Meanwhile, the quantity of the harmonica tubes 400 is reduced, the weight of the battery pack is reduced, and the power performance of the whole vehicle can be improved.

The number of the harmonica tubes 400 mentioned in the above embodiment is eight and the width of the harmonica tubes 400 is 52.3mm, but it is a specific embodiment of the technology of the patent, and for power batteries of different specifications, the technology of the patent can be applied by setting more or less harmonica tubes 400 and matching different combinations of harmonica tube 400 widths, so as to achieve the purpose of battery thermal management, and the technology belongs to the technical scope of the patent.

For further heat exchange efficiency of the heat exchanger, as shown in fig. 1 and 3, in some embodiments, a temperature equalization plate 500 is fixedly connected to the lower portion of the plurality of harmonica tubes 400. The vapor chamber 500 may be made of a material suitable in the related art, and may be connected to the plurality of harmonica tubes 400 by welding, including but not limited to brazing. When the harmonica-shaped cooling device is actually used, the temperature-uniforming plate 500 is directly contacted with a power battery, and the harmonica tubes 400 are fixedly arranged above the temperature-uniforming plate 500 and are used for driving heat of the temperature-uniforming plate 500 to cool the power battery; or the temperature-uniforming plate 500 is heated, thereby heating the power cells.

In the correlation technique, the head and the tail of the direct cooling plate all adopt a large number of 600-class structural parts of the gasket, and each part is designed with a bending structure for improving the strength of the direct cooling plate and supporting the shunt tube assembly 100 to a certain extent.

In order to improve the strength of the vapor chamber 500 and the entire heat exchanger, as shown in fig. 1, 3 and 8, in some embodiments of the present disclosure, a gasket 600 extending in a second direction Y perpendicular to the first direction X is connected to each of two ends of the vapor chamber 500 in the first direction X. Wherein, a gasket 600 is located on one side of the temperature-uniforming plate 500 in the first direction X, and the other is located on the other side, and all extends along the second direction Y, and adopts an integral structure, and the assembly time has been shortened by about 85.7% in theory. It should be noted that, an end of the gasket 600 away from the vapor chamber 500 may be provided with a plurality of upwardly bent arc portions for supporting the shunt tube assembly 100 and the tail manifold 200, respectively.

In summary, the power battery heat exchanger provided by the present disclosure includes the connector 300, the shunt tube assembly 100, the tail portion collecting tube 200, the temperature equalizing plate 500, and the eight harmonica tubes 400, and is integrally welded in a furnace by brazing. The shunt tube assembly 100 comprises a first-stage shunt tube 110, two second-stage shunt tubes 120, a first-stage collecting tube 130 and two second-stage collecting tubes 140; the tail manifold 200 is divided into a first line 210 and a second line 220 by a baffle 230. A bending part 410 with a certain bending angle is formed at the first end 401 of the harmonica pipe 400, the secondary shunt pipe 120 and the secondary collecting pipe 140 are inserted, and the problem of welding blockage can be effectively avoided by controlling the insertion depth; the second end 402 of the harmonica tube 400 is not bent, which can accelerate the production beat. Meanwhile, the middle part of the tail collecting pipe 200 is designed with a spacer 230, so that the mixed flow and the loop flow of the left and right flow channels are prevented from being uneven. Through the innovation of the primary flow distribution and secondary flow distribution and primary flow concentration and secondary flow concentration structures, the secondary collecting flow and the refrigerant flow direction in the secondary collecting pipe 140 are inserted into the plurality of micro channels 4001 perpendicular to the first end 401 of the harmonica shaped pipe 400, so that the flow distribution uniformity is greatly improved, and as shown in fig. 9, the flow deviation of each flow channel is within 0.3%; meanwhile, the pressure drop of the whole cooler is about 105kpa (shown in figure 10), the temperature equalizing performance is good, and the temperature difference of the power battery caused by the flow of the coolant in the harmonica tubes 400 can be effectively reduced.

In a second aspect of the present disclosure, a battery pack is further provided, which includes a power battery, and the battery pack further includes the heat exchanger for the power battery, where the heat exchanger is disposed on an upper surface and/or a lower surface of the power battery, and the heat exchanger is used for cooling or heating the power battery. Therefore, the battery pack also has all the advantages of the heat exchanger, and the description is omitted.

In a third aspect of the present disclosure, a vehicle is also provided, which includes the battery pack described above. Simultaneously, this electric vehicle also possesses the advantage of battery package, can also save the space on the vertical direction of vehicle to a certain extent.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.

Claims (10)

1. A heat exchanger for power cells, characterized in that the heat exchanger comprises a shunt tube assembly (100), a tail manifold (200), a connector (300) and a plurality of harmonica tubes (400); a plurality of said harmonica tubes (400) disposed between said shunt tube assembly (100) and said tail manifold (200), said harmonica tubes (400) including opposing first (401) and second (402) ends, the second ends (402) of said plurality of harmonica tubes (400) being in communication through said tail manifold (200);

the shunt tube assembly (100) comprises a primary shunt tube (110), a secondary shunt tube (120), a primary manifold (130) and a secondary manifold (140); the connector (300) is arranged at the plurality of harmonica tubes (400) and the first ends (401), an inlet (301) of the connector (300) is communicated with the middle of the first-stage shunt tube (110), two ends of the first-stage shunt tube (110) are respectively communicated with the second-stage shunt tube (120), and the second-stage shunt tube (120) is communicated with the first ends (401) of part of the harmonica tubes (400);

the outlet (302) of the joint (300) is communicated with the middle of the first-stage collecting pipe (130), two ends of the first-stage collecting pipe (130) are communicated with the second-stage collecting pipe (140) respectively, and the second-stage collecting pipe (140) is communicated with the first end (401) of the harmonica pipe (400).

2. The power cell heat exchanger of claim 1, wherein the harmonica tubes (400) extend in a first direction, and the secondary shunt tubes (120) and the secondary manifold (140) extend in a second direction, the first direction being perpendicular to the second direction.

3. The heat exchanger of the power battery according to claim 2, wherein the first end (401) of the harmonica tube (400) is bent downwards to form a bent portion (410), the bent portion (410) is inserted into the secondary shunt tube (120) and/or the secondary manifold (140) for a preset distance, and the bent portion (410) is welded and fixed with the secondary shunt tube (120) and/or the secondary manifold (140).

4. The heat exchanger for power batteries according to claim 3, characterized in that the harmonica tube (400) comprises a plurality of micro-channels (4001) for the circulation of cooling fluid, and the plurality of micro-channels (4001) of the first end (401) of the harmonica tube (400) extend in a direction perpendicular to the extending direction of the secondary flow-dividing tube (120) and/or the secondary flow-collecting tube (140).

5. The heat exchanger of the power battery according to claim 2, wherein the number of the harmonica tubes (400) is eight, and the harmonica tubes are arranged at intervals along the second direction, and the number of the secondary shunt tubes (120) and the number of the secondary collecting tubes (140) are two;

in the second direction, the eight harmonica tubes (400) are a first tube (400 a), a second tube (400 b), a third tube (400 c), a fourth tube (400 d), a fifth tube (400 e), a sixth tube (400 f), a seventh tube (400 g) and an eighth tube (400 h) in sequence along the second direction; the first pipe fitting (400 a) is communicated with the fourth pipe fitting (400 d) through one second-stage shunt pipe (120), the fifth pipe fitting (400 e) is communicated with the eighth pipe fitting (400 h) through the other second-stage shunt pipe (120), and two ends of the first-stage shunt pipe (110) are respectively communicated with the middles of the two second-stage shunt pipes (120); and two ends of the first-stage collecting pipe (130) are respectively connected to the middle parts of the two second-stage collecting pipes (140).

6. The heat exchanger of the power battery as recited in claim 5, characterized in that a spacer (230) is arranged in the middle of the tail collecting pipe (200), the spacer (230) is used for dividing the tail collecting pipe (200) into a first pipe (210) and a second pipe (220), wherein the first pipe (210) is communicated with the first pipe (400 a), the second pipe (400 b), the third pipe (400 c) and the fourth pipe (400 d);

the second pipeline (220) is communicated with the fifth pipe fitting (400 e), the sixth pipe fitting (400 f), the seventh pipe fitting (400 g) and the eighth pipe fitting (400 h) respectively.

7. The heat exchanger of power battery according to any one of claims 1-6, wherein a temperature equalizing plate (500) is fixedly connected to the lower part of the harmonica tubes (400).

8. The heat exchanger of the power battery according to claim 7, wherein a gasket (600) is connected to each of two ends of the temperature equalizing plate (500) in the length direction of the harmonica tube (400), the gasket (600) extends in the length direction perpendicular to the harmonica tube (400), and an end of the gasket (600) far away from the temperature equalizing plate (500) is formed with an arc portion bent upwards.

9. A battery pack comprising a power battery, wherein the battery pack further comprises a heat exchanger of the power battery according to any one of claims 1-8, and the heat exchanger is used for cooling or heating the power battery.

10. A vehicle characterized in that the vehicle comprises the battery pack according to claim 9.

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