Power battery heat exchanger, power battery system, and electric vehicle

Abstract

Power battery heat exchanger, power battery system, and electric vehicle. The power battery heat exchanger includes a connector, a first header assembly and a second header assembly separately arranged in a first direction, and a plurality of harmonic pipes arranged between the first header assembly and the second header assembly and separately arranged in a second direction. The first header assembly includes a first header and a second header. The inlet of the connector communicates separately with a first end of a part of the harmonic pipes by the first header, and the outlet of the connector communicates separately with a first end of other harmonic pipes by the second header. The second ends of the plurality of harmonic pipes communicate with each other by the second header assembly.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims the priority and benefit of Chinese Patent Application No. 202210772688.X, filed on June 30, 2022, entitled "POWER BATTERY HEAT EXCHANGER, POWER BATTERY SYSTEM, AND ELECTRIC VEHICLE". The entire content of the above application is incorporated herein by reference.

[0002] This disclosure relates to the field of power battery technology, and more particularly, to a power battery heat exchanger, a power battery system, and an electric vehicle.

Background Art

[0003] In the prior art, the header assembly of a heat exchanger for direct cooling of a power battery is usually formed by a plurality of circular tubes and three - channel tubes. Furthermore, the header assembly generally does not heat or cool the battery system, resulting in heating loss or cooling loss, and reducing the heat exchange efficiency of the heat exchanger.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The objective of this disclosure is to provide a power battery heat exchanger, a power battery system, and an electric vehicle. The power battery heat exchanger arranges a first header and a second header as a first header assembly. In this way, the number of pipelines in the first header assembly is reduced, which has high space utilization, reduces ineffective heat exchange, improves the heat exchange efficiency of the heat exchanger, and reduces material costs.

Means for Solving the Problems

[0005] To achieve the above - mentioned objective, according to a first aspect of this disclosure, a power battery heat exchanger is provided, and a connector including an inlet and an outlet, A first header assembly and a second header assembly spaced apart in a first direction, the first header assembly including a first header and a second header, the first header assembly and the second header assembly; A plurality of harmonica tubes disposed between the first header assembly and the second header assembly and spaced apart in a second direction. The harmonica tubes include a first end and a second end facing each other. The inlet of the connector communicates with the first ends of some of the harmonica tubes through the first header, and the outlet of the connector communicates with the first ends of the other harmonica tubes through the second header. The second ends of the plurality of harmonica tubes communicate through the second header assembly.

[0006] Optionally, the first direction is perpendicular to the second direction.

[0007] Optionally, in the second direction, at least two outermost harmonica tubes communicate with the first header.

[0008] Optionally, the number of harmonica tubes is even, and the number of harmonica tubes connected to the first header is equal to the number of harmonica tubes connected to the second header.

[0009] Optionally, the number of harmonica tubes is eight. In the second direction, the four innermost harmonica tubes communicate with the second header respectively, and the other four harmonica tubes communicate with the first header respectively.

[0010] Optionally, the number of harmonica tubes is eight. In the second direction, the two outermost harmonica tubes and the two innermost harmonica tubes communicate with the first header respectively, and the other four harmonica tubes communicate with the second header respectively.

[0011] Optionally, the second header assembly includes a third header and a fourth header, The third manifold communicates with the second ends of four adjacent harmonica tubes, and the fourth manifold communicates with the second ends of four other adjacent harmonica tubes.

[0012] Optionally, the power battery heat exchanger further includes a vapor chamber disposed on the side surfaces of the plurality of harmonica tubes, and the plurality of harmonica tubes are fixedly connected to the vapor chamber.

[0013] Optionally, the first manifold is provided with a plurality of first strip holes extending in the longitudinal direction of the first manifold, and the harmonica tubes are fixedly connected to the first strip holes in order to communicate the plurality of flow channels of the harmonica tubes with the first manifold, and / or the second manifold is provided with a plurality of second strip holes extending in the longitudinal direction of the second manifold, and the harmonica tubes are fixedly connected to the second strip holes in order to communicate the plurality of flow channels of the harmonica tubes with the second manifold.

[0014] Optionally, the connector includes a liquid inlet communicating with the inlet and a liquid outlet communicating with the outlet. The liquid inlet communicates with the first manifold through a first connecting pipe, and the liquid outlet communicates with the second manifold through a second connecting pipe.

[0015] According to a second aspect of the present disclosure, a power battery system is further provided and includes a power battery. The power battery system further includes the aforementioned power battery heat exchanger. The power battery heat exchanger is disposed on the surface of the power battery and is configured to heat and / or cool the power battery.

[0016] According to a third aspect of the present disclosure, an electric vehicle is further provided. The electric vehicle includes the aforementioned power battery system.

[0017] The foregoing technical solution, that is, through the power battery heat exchanger of the present disclosure, the first header assembly is arranged as the first header and the second header, and the first header and the second header communicate with the inlet and outlet of the connector respectively. In this way, the refrigerant entering through the inlet passes directly into some harmonic pipes after passing through the first header, is combined by the second header assembly, flows into the remaining harmonic pipes, finally passes through the second header, and flows out through the outlet of the connector to form a circuit. The plurality of harmonic pipes exchange heat with the power battery through the vapor chamber to heat or cool the power battery. In the power battery heat exchanger of the present disclosure, the first header assembly includes only the first header and the second header. In this way, the number of pipelines in the first header assembly is reduced as a whole, the space utilization is improved, the ineffective heat exchange is reduced, the heat exchange efficiency of the heat exchanger is improved, and the material cost is reduced.

[0018] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments.

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure, form a part of this specification, and are used together with the following specific embodiments to explain the present disclosure, but are not intended to limit the present disclosure.

Brief Description of the Drawings

[0020]

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DETAILED DESCRIPTION OF THE INVENTION

[0021] The following will describe specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely used to explain and illustrate the present disclosure and are not intended to limit the present disclosure.

[0022] In the present disclosure, unless stated otherwise, terms of direction such as "up", "down", "left", and "right" generally mean up, down, left, and right in the accompanying drawings, "inner" and "outer" mean "inner" and "outer" with respect to the contours of the corresponding components, "X" means the first direction, and "Y" means the second direction. Further, terms such as "first", "second", "third", "fourth", etc. used in the present disclosure are for distinguishing one element from another and do not have an order or importance. Further, when the following description is made in relation to the accompanying drawings, unless otherwise stated, the same reference numerals in different accompanying drawings represent the same or similar elements. The foregoing definitions are merely used to explain and illustrate the disclosure and should not be construed as a limitation to the present disclosure.

[0023] Heat exchangers for direct cooling of power batteries in the prior art are shown in FIGS. 1 and 2. The heat exchanger is mainly formed by welding a harmonic tube 10, a manifold assembly 20, a tail-end manifold 30, a connector 40, and a vapor chamber 50. The connector 40 is connected to the air conditioning system of the entire vehicle. The connector 40, the manifold assembly 20, the tail-end manifold 30, and the harmonic tube 10 are welded together to form a heat exchanger having a flow channel inside. The vapor chamber 50 is welded and fixed to the harmonic tube 10. At present, the heat exchanger is connected to the entire vehicle through a two-hole connector, and the harmonic tube is used as a component that exchanges heat with the battery throughout the heat exchanger. In order to maximize the performance of the heat exchanger, the harmonic tube covers the power battery. Therefore, the connection between the connector and the harmonic tube needs to be transferred through a connection pipe assembly. The manifold assembly 20 of the heat exchanger is formed by nine circular tubes and two three-channel tubes. Furthermore, the manifold assembly cannot be in direct contact with the battery, nor can it heat or cool the battery system, resulting in heat loss or cooling loss and reducing the heat exchange efficiency of the heat exchanger.

[0024] As shown in FIGS. 3 to 9, in order to achieve the above object, according to the first aspect of the present disclosure, a power battery heat exchanger 1000 is provided, and includes a connector 400, a steam chamber 500, a first header assembly 200 and a second header assembly 300 that are spaced apart in a first direction X, and a plurality of harmonic tubes 100 that are disposed between the first header assembly 200 and the second header assembly 300 and are spaced apart in a second direction Y. The plurality of harmonic tubes 100 are connected to the steam chamber 500. The first direction X is perpendicular to the second direction Y. The harmonic tube 100 includes a first end 101 and a second end 102 facing each other. The first header assembly 200 includes a first header 210 and a second header 220. The connector 400 includes an inlet 401 and an outlet 402. The inlet 401 of the connector 400 communicates with the first ends 101 of some of the harmonic tubes 100 through the first header 210 respectively. The outlet 402 of the connector 400 communicates with the first ends 101 of the other harmonic tubes 100 through the second header 220 respectively. The second ends 102 of the plurality of harmonic tubes 100 communicate through the second header assembly 300.

[0025] Through the aforementioned technical solution, i.e., the power battery heat exchanger 1000 of the present disclosure, the first header pipe 210 and the second header pipe 220 are arranged as the first header pipe assembly 200, and the first header pipe 210 and the second header pipe 220 communicate with the inlet 401 and the outlet 402 of the connector 400 respectively. In this way, the refrigerant entering through the inlet 401 directly enters some of the harmonic pipes 100 after passing through the first header pipe 210, is combined by the second header pipe assembly 300, flows into the remaining harmonic pipes 100, finally passes through the second header pipe 220, and flows out through the outlet 402 of the connector 400 to form a circuit. The plurality of harmonic pipes 100 exchange heat with the power battery 600 through the steam chamber 500 to heat or cool the power battery 600. In the power battery heat exchanger 1000 of the present disclosure, the first header pipe assembly 200 includes only the first header pipe 210 and the second header pipe 220. In this way, the number of pipelines in the first header pipe assembly 200 is reduced as a whole, which has high space utilization, avoids ineffective heat exchange, improves the heat exchange efficiency of the power battery heat exchanger 1000, and reduces the material cost.

[0026] It should be noted that the inlet 401 and the outlet 402 of the connector 400 are configured for the inflow and outflow of the refrigerant in the entire power battery heat exchanger 1000. The harmonic pipe 100 has a plurality of flow channels 110 inside. The connector 400, the first header pipe 210, the second header pipe 220, the harmonic pipe 100, and the second header pipe assembly 300 are incorporated and welded to each other, and the channels in the components communicate with each other to form channels for the flow of the refrigerant in the power battery heat exchanger 1000. To increase the heat exchange area of the entire power battery heat exchanger 1000, the steam chamber 500 and the harmonic pipe 100 are welded together.

[0027] It should be noted that the first direction X is perpendicular to the second direction Y. Specifically, the extending direction of the plurality of harmonica tubes 100 is perpendicular to the extending directions of the first collecting tube 210, the second collecting tube 220, and the second collecting tube assembly 300, which promotes the uniformity of the refrigerant flow from the collecting tubes into the harmonica tubes 100.

[0028] In some embodiments, the first direction X and the second direction Y may not be perpendicularly arranged but instead form an angle, which can also meet the aforementioned communication requirements. For example, the harmonica tubes 100 may extend in the first direction X, the first collecting tube 210 and the second collecting tube 220 may extend in the second direction Y, and the angle between the first direction X and the second direction Y may be 15°, 30°, 45°, 60°, 75°, 105°, 120°, 135°, 150°, 165°, etc.

[0029] As shown in FIG. 3, the power battery 600 adopts a long-battery transverse arrangement solution. The two ends of the power battery 600 are the battery positive electrode 610 and the battery negative electrode 620, respectively. The battery positive electrode 610 of the power battery 600 is arranged towards the battery negative electrode 620 in the direction consistent with the second direction Y of the power battery heat exchanger 1000. When the power battery 600 is at a high temperature, the temperatures of the positive and negative electrodes at the two ends of the power battery 600 are higher than the temperature at the center. Therefore, when the power battery 600 cools down, the cooling of the two ends of the power battery 600 needs to be considered first.

[0030] In some embodiments, in the second direction Y, at least the outermost two harmonic pipes 100 communicate with the first collecting pipe 210. As shown in FIGS. 5 and 6, the first ends 101 of at least the leftmost and rightmost harmonic pipes 100 communicate with the first collecting pipe 210 to function as channels for the refrigerant to first enter, which has the best cooling effect. The first ends 101 of the other harmonic pipes 100 placed at the central position communicate with the second collecting pipe 220 and function as channels for the refrigerant to finally flow out. The cooling effect is slightly lower than that of the outermost two harmonic pipes 100 in order to meet the actual usage requirements of the power battery 600 and reduce the temperature difference of the power battery 600. It should be noted that the second ends 102 of the plurality of harmonic pipes 100 communicate through the second collecting pipe assembly 300. In this way, the plurality of harmonic pipes 100 communicate to form a refrigerant flow.

[0031] In light of the aforementioned temperature characteristics of the power battery 600 where the temperatures at the two ends are relatively high and the temperature at the center is relatively low, the flow direction of the refrigerant in the harmonic pipes 100 of the power battery heat exchanger 1000 is redesigned. The aforementioned power battery heat exchanger 1000 is connected to the air conditioning system. In other words, the refrigerant in the air conditioning system enters through the inlet 401 of the connector 400, flows to the first collecting pipe 210, and is then distributed from the first collecting pipe 210 to the left and right outermost harmonic pipes 100 or the harmonic pipes 100 close to the outside, flows through the second collecting pipe assembly 300 and the other harmonic pipes 100 to the original second collecting pipe 220, and then flows out of the air conditioning system through the outlet 402 of the connector 400. The power battery heat exchanger 1000 is hardly connected and is connected in parallel in the vehicle's air conditioning system through the connector 400. When the power battery system needs to lower the temperature, the air conditioning control device controls the refrigerant to flow to the power battery heat exchanger 1000, which has the effect of lowering the temperature of the power battery 600.

[0032] Similarly, when the temperature of the power battery 600 is relatively low and heating is required, the refrigerant enters through the outlet 402 of the connector 400 so that the power battery can be heated, flows through the second manifold 220 and the plurality of harmonic pipes 100 at the central position, flows through the second manifold assembly 300 and the other outer harmonic pipes 100 back to the original first manifold 210, and then flows out to the air conditioning system through the inlet 401 of the connector 400.

[0033] It should be noted that both the first manifold 210 and the second manifold 220 may be aluminum pipes, or may be made of other metal materials such as copper or aluminum alloy materials.

[0034] To further improve the cooling and heating uniformity of the power battery heat exchanger 1000, in some embodiments of the present disclosure, as shown in FIGS. 5 and 6, the number of harmonic pipes 100 is even, and the number of harmonic pipes 100 connected to the first manifold 210 is equal to the number of harmonic pipes 100 connected to the second manifold 220. This corresponds to the fact that the flow rate of the refrigerant flowing into the harmonic pipes 100 and the flow rate of the refrigerant flowing out of the harmonic pipes 100 can be maintained to be substantially equal. In other words, when the flow directions of the refrigerant in different harmonic pipes 100 are set according to the characteristics of the power battery 600 so as to adapt to different temperatures at the two ends of the power battery 600 and the central portion of the power battery 600, the flow rate and pressure drop on one side of the power battery heat exchanger 1000 can be maintained to be somewhat uniform.

[0035] As shown in FIG. 5, in some embodiments, the number of harmonica tubes 100 is eight. In the second direction, the four innermost harmonica tubes 100 communicate with the second manifold 220 respectively, and the other four harmonica tubes 100 communicate with the first manifold 210 respectively. The first ends 101 of the two leftmost harmonica tubes 100 and the two rightmost harmonica tubes 100 communicate with the first manifold 210 respectively, and the first ends 101 of the four harmonica tubes 100 at the central position communicate with the second manifold 220 respectively. The second ends 102 of the eight harmonica tubes 100 communicate with each other through the second manifold assembly 300. During the cooling process, the refrigerant of the air conditioning system enters through the inlet 401 of the connector 400 and flows through the first manifold 210 to the four leftmost and rightmost harmonica tubes 100 respectively. The refrigerant converges in the second manifold assembly 300 at the second ends 102 of the four harmonica tubes 100, then flows into the second manifold 220 through the four harmonica tubes 100 that communicate with the second manifold assembly 300 and are located at the central position, and flows into the original air conditioning system through the outlet 402 of the connector 400. During the flowing process, the refrigerant first enters the two leftmost harmonica tubes 100 and the two rightmost harmonica tubes 100 so that the power battery 600 can reach the appropriate temperature range most rapidly, and cools the two ends of the power battery 600 with a relatively high temperature. Then, the four harmonica tubes 100 at the central position cool the central position of the battery, which can also meet the temperature requirements of the power battery 600. During the heating process, the flow direction is exactly opposite. Specifically, the refrigerant enters through the outlet 402 of the connector 400 and flows out through the inlet 401 of the connector 400 so that the battery can be heated. Compared with the prior art, in the first manifold assembly 200 of the present disclosure, the number of deflector tubes is simplified and heat loss is avoided. Therefore, through the above-mentioned eight harmonica tubes 100 in combination with the vapor chamber 500, the heat dissipation requirements can be met.

[0036] As shown in FIG. 6, in some other embodiments, the number of harmonica tubes 100 is eight. In the second direction, the two outermost harmonica tubes 100 and the two innermost harmonica tubes 100 communicate with the first manifold 210 respectively, and the other four harmonica tubes 100 communicate with the second manifold 220 respectively. In the second direction Y, the first ends 101 of the leftmost and rightmost harmonica tubes 100 and the two harmonica tubes closest to the center communicate with the first manifold 210 respectively, while the first ends 101 of the remaining four harmonica tubes 100 communicate with the second manifold 220 respectively, and the second ends 102 of the eight harmonica tubes 100 communicate with the second manifold assembly 300 respectively. In the cooling process, the refrigerant of the air conditioning system enters through the inlet 401 of the connector 400, flows through the first manifold 210 to the four harmonica tubes 100, that is, the one on the rightmost side, the one on the leftmost side, and the two harmonica tubes closest to the center. The refrigerant converges in the second manifold assembly 300 at the second ends 102 of the four harmonica tubes 100, and then flows into the second manifold 220 through the two harmonica tubes 100 placed between the leftmost harmonica tube 100 and the harmonica tube closest to the center and the two harmonica tubes 100 placed between the rightmost harmonica tube 100 and the harmonica tube closest to the center, which communicate with the second manifold assembly 300, and flows into the original air conditioning system through the outlet 402 of the connector 400. In the flow process, the refrigerant first enters the leftmost harmonica tube 100, the rightmost harmonica tube 100, and the harmonica tube closest to the center, and cools the two ends of the power battery 600 having a relatively high temperature and the position closest to the center with a low tendency to dissipate heat. In this way, the power battery can reach the appropriate temperature range most rapidly. Then, the other four harmonica tubes 100 cool the positions between the two ends and the central part of the battery, further meeting the temperature requirements of the power battery 600. In the heating process, the flow direction is exactly opposite. Specifically, the refrigerant enters through the outlet 402 of the connector 400 so that the battery can be heated and flows out through the inlet 401 of the connector 400.Details will not be described again in this specification.

[0037] The second manifold assembly 300 can be configured by using any suitable structure and can be formed by using a tube that extends in the second direction Y and has two sealed ends. The tube includes, but is not limited to, an aluminum tube. As shown in FIG. 6, in some embodiments of the present disclosure, the second manifold assembly 300 includes a third manifold 310 and a fourth manifold 320. The third manifold 310 communicates with the second ends 102 of four adjacent harmonic tubes 100. The fourth manifold 320 communicates with the second ends 102 of four other adjacent harmonic tubes 100. That is, the third manifold 310 communicates with the second ends 102 of the four harmonic tubes 100 on the left side. During cooling, between the four harmonic tubes 100, the refrigerant flows from the two harmonic tubes 100 on the two sides into the third manifold 310, and the refrigerant in the third manifold 310 flows into the two central harmonic tubes 100. Further, the fourth manifold 320 communicates with the second ends 102 of the four harmonic tubes 100 on the right side. During cooling, between the four harmonic tubes 100, the refrigerant flows from the two harmonic tubes 100 on the two sides into the fourth manifold 320, and the refrigerant in the fourth manifold 320 flows into the two central harmonic tubes 100. During heating, the flow direction is exactly opposite. In order to avoid affecting the flow rate distribution of the refrigerant in each harmonic tube 100 as a result of the confluence when the refrigerant flows into the second manifold assembly 300, and to further improve the flow stability during cooling or heating, it is also understood that the eight harmonic tubes 100 are divided into a left group and a right group.

[0038] In some embodiments, the second manifold assembly 300 can alternatively be a straight tube extending in the second direction. The two ends of the straight tube are sealed, and the second ends 102 of the plurality of harmonic tubes 100 are respectively connected to the straight tube at intervals. In this way, it is also possible for the refrigerant to flow into some of the harmonic tubes 100 and flow out from other harmonic tubes 100. In order to achieve the above-mentioned effect of improving the stability of the internal flow rate, a block seal member may be disposed at the central position of the straight tube, and it should be noted that the straight tube may be divided into two sections. The four harmonic tubes 100 on the left side communicate with one of the sections, and the four harmonic tubes 100 on the right side communicate with the other section, which can also achieve the purpose of stabilizing the flow rate.

[0039] To improve the reliability of the connection of the first manifold 210 and the second manifold 220 to the harmonic tubes 100, in some embodiments of the present disclosure, as shown in FIGS. 8 and 9, a plurality of first strip holes 211 extending in the longitudinal direction of the first manifold 210 are provided in the first manifold 210. The harmonic tubes 100 are fixedly connected to the first strip holes 211 in order to communicate the plurality of flow channels 110 of the harmonic tubes 100 with the first manifold 210. A plurality of first strip holes 211 corresponding to the width of the harmonic tubes 100 are provided in the first manifold 210. The harmonic tubes 100 are incorporated into the first strip holes 211 and connected to the first strip holes 211 by welding.

[0040] In some embodiments, a plurality of second strip holes 221 extending in the longitudinal direction of the second manifold 220 are provided in the second manifold 220. The harmonic tubes 100 are fixedly connected to the second strip holes 221 in order to communicate the plurality of flow channels 110 of the harmonic tubes 100 with the second manifold 220. A plurality of second strip holes 221 corresponding to the width of the harmonic tubes 100 are provided in the second manifold 220. The harmonic tubes 100 are incorporated into the second strip holes 221 and connected to the second strip holes 221 by welding.

[0041] As shown in FIG. 9, one end of the harmonica tube 100 is bent downward with respect to the portion connecting the harmonica tube 100 to the vapor chamber 500 in order to wrap the power battery 600 when connected to the power battery 600, and it should be noted that it is connected to the first manifold assembly 200. The other end may be a straight section, that is, the straight section and the portion connected to the vapor chamber 500 may be in the same plane, that is, the other end is not bent and is directly connected to the second manifold assembly 300.

[0042] The connector 400 can be configured in any suitable manner. As shown in FIGS. 7 and 8, in some embodiments of the present disclosure, the connector 400 may include an inlet 401, an outlet 402, a liquid inlet 403 communicating with the inlet 401, and a liquid outlet 404 communicating with the outlet 402. The liquid inlet 403 communicates with the first manifold 210 through the first connecting pipe 230, and the liquid outlet 404 communicates with the second manifold 220 through the second connecting pipe 240. The connector 400 is connected to the pipeline of the air conditioning system through the inlet 401 and the outlet 402 of the connector 400. For example, the connector may ultimately be connected to the cooling and heating pipelines of the vehicle cab as long as heat exchange of the power battery 600 is performed, or may be connected to other corresponding pipelines capable of achieving cooling and heating.

[0043] In the prior art, as shown in FIGS. 1 and 2, the heat exchanger is mainly formed by welding a harmonica tube 10, a manifold assembly, a tail-end manifold, a connector 40, and a steam chamber 50. The connector 40 is connected to the air conditioning system of the entire vehicle. The connector 40, the manifold assembly, and the harmonica tube 10 are welded together to form a heat exchanger having a flow channel inside. The steam chamber 50 is welded and fixed to the harmonica tube 10. The manifold assembly includes a total of nine tubes, namely, two connecting tubes, two three-channel valves, four deflector tubes, a manifold 1, and two manifolds 2. The connector 40 is connected to the two three-channel valves through the two connecting tubes respectively. The three-channel valves are further connected to the two manifolds 2 through the left deflector tube and the right deflector tube having a deflector function. The three-channel valves are connected to the manifold 1 through the two deflector tubes having a left and right flow splitting function. As shown in FIG. 2, the inlet and outlet are incorporated in the connector 40. For example, the manifold assembly can be formed by nine circular tubes. The manifold assembly functions as a transition assembly between the connector 40 and the harmonica tube 10 and serves to distribute the flow rate of the connector 40 to the harmonica tube 10. As shown in FIG. 2, the refrigerant flows in from the inlet of the connector 40, is divided into a left flow channel and a right flow channel, and each flow channel is further divided into two flow channels. Finally, in the manifold 1, the refrigerant flows into the four flow channels to the harmonica tube 10. The flow channels flow to the tail-end manifold and then flow reversely from the other four harmonica tubes 10 to the manifold 2 of the original manifold assembly. The four flow channels are combined into two flow channels and then combined into one flow channel and flow out from the outlet of the connector.

[0044] Compared with the solution in the aforementioned prior art, according to the power battery heat exchanger 1000 provided in the present disclosure, the number of pipelines of the header assembly in the heat exchanger is reduced from the original nine to four. In this way, the materials are reduced and the manufacturing cost is cut. Furthermore, since the original nine pipelines on the header assembly are arranged outside the power battery 600, the effect of lowering the temperature of the battery cannot be obtained. Now, the number of pipelines of the header assembly is reduced to four, which can reduce ineffective heat exchange and improve the heat exchange efficiency of the heat exchanger.

[0045] According to a second aspect of the present disclosure, a power battery system 2000 is further provided and includes a power battery 600. The power battery system 2000 further includes the aforementioned power battery heat exchanger 1000. The power battery heat exchanger 1000 is arranged on the surface of the power battery 600 and is configured to heat and / or cool the power battery 600. The heater of the power battery 600, that is, the harmonica tube 100 and the steam chamber 500, may be arranged on the upper surface of the power battery 600 or on the lower surface of the power battery 600 as long as the cooling or heating of the power battery 600 can be carried out. Furthermore, it can be understood that the power battery heat exchanger 1000 being arranged on the surface of the power battery 600 means being directly or indirectly arranged on the surface of the power battery 600. For example, the power battery heat exchanger 1000 may be attached to the surface of the power battery 600, or a thermally conductive adhesive may be arranged between the power battery heat exchanger 1000 and the power battery 600. The power battery heat exchanger 1000 is coupled to the surface of the power battery 600 through a thermally conductive adhesive.

[0046] The directions of the two ends of the power battery 600 (i.e., the direction of the battery anode 610 of the power battery 600 facing the battery cathode 620) coincide with the second direction of the power battery heat exchanger 1000. Specifically, in the second direction, the two outermost harmonic pipes 100 correspond to the two ends of the power battery 600 in order to improve the cooling performance at the two ends of the power battery 600 when cooling is required, and also to improve the heating performance at the central position of the battery when heating is required.

[0047] As shown in FIG. 10, according to a third aspect of the present disclosure, an electric vehicle 3000 is further provided. The electric vehicle 3000 includes the aforementioned power battery system 2000. Therefore, the electric vehicle 3000 also has the advantages of the aforementioned power battery system 2000. Details are not described again herein.

[0048] Optional embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the foregoing embodiments, and a plurality of simple modifications may be made to the technical solution of the present disclosure within the scope of the technical concept of the present disclosure, and these simple modifications are included in the protection scope of the present disclosure.

[0049] Furthermore, it should be noted that the specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, various possible combinations are not further described in the present disclosure.

[0050] Furthermore, various embodiments of the present disclosure may be appropriately combined as long as they do not deviate from the idea of the present disclosure, and the combination should also be regarded as the content of the present disclosure.

Claims

1. A power battery heat exchanger (1000), A connector (400) having an inlet (401) and an outlet (402), A first header assembly (200) and a second header assembly (300) spaced apart in a first direction, wherein the first header assembly (200) includes a first header (210) and a second header (220), the first header assembly (200) and the second header assembly (300); A plurality of harmonic pipes (100) disposed between the first header assembly (200) and the second header assembly (300) and spaced apart in a second direction; comprising, wherein the harmonic pipe (100) has a first end (101) and a second end (102) facing each other, the inlet (401) of the connector (400) is respectively communicated with the first ends (101) of some harmonic pipes (100) through the first header (210), the outlet (402) of the connector (400) is respectively communicated with the first ends (101) of other harmonic pipes (100) through the second header (220), and the second ends (102) of the plurality of harmonic pipes (100) are communicated through the second header assembly (300). A power battery heat exchanger (1000).

2. The power battery heat exchanger (1000) according to claim 1, wherein the first direction is perpendicular to the second direction.

3. The power battery heat exchanger (1000) according to claim 1 or 2, wherein at least two outermost harmonic pipes (100) communicate with the first header (210) in the second direction.

4. The power battery heat exchanger (1000) according to any one of claims 1 to 3, wherein the number of harmonic pipes (100) is even, and the number of harmonic pipes (100) connected to the first header (210) is equal to the number of harmonic pipes (100) connected to the second header (220).

5. The number of the harmonica tubes (100) is eight, and in the second direction, the four innermost harmonica tubes (100) communicate with the second manifold tube (220) respectively, and the other four harmonica tubes (100) communicate with the first manifold tube (210) respectively. The power battery heat exchanger (1000) according to any one of claims 1 to 4.

6. The number of the harmonica tubes (100) is eight, and in the second direction, the two outermost harmonica tubes (100) and the two innermost harmonica tubes (100) communicate with the first manifold tube (210) respectively, and the other four harmonica tubes (100) communicate with the second manifold tube (220) respectively. The power battery heat exchanger (1000) according to any one of claims 1 to 4.

7. The second manifold assembly (300) includes a third manifold tube (310) and a fourth manifold tube (320). The third manifold tube (310) communicates with the second ends (102) of four adjacent harmonica tubes (100), and the fourth manifold tube (320) communicates with the second ends of the other four adjacent harmonica tubes (100). The power battery heat exchanger (1000) according to claim 6.

8. The power battery heat exchanger (1000) according to any one of claims 1 to 7 further includes a steam chamber (500) disposed on the side surfaces of the plurality of harmonica tubes (100), and the plurality of harmonica tubes (100) are fixedly connected to the steam chamber (500).

9. The first manifold tube (210) is provided with a plurality of first strip holes (211) extending in the length direction of the first manifold tube (210), and the harmonica tubes (100) are fixedly connected to the first strip holes (211) in order to communicate the plurality of flow channels (110) of the harmonica tubes (100) with the first manifold tube (210), and / or The second collecting pipe (220) is provided with a plurality of second strip holes (221) extending in the longitudinal direction of the second collecting pipe (220), and the harmonica pipe (100) is fixed and connected to the second strip holes (221) in order to communicate the plurality of flow channels (110) of the harmonica pipe (100) with the second collecting pipe (220). The power battery heat exchanger (1000) according to any one of claims 1 to 8.

10. The connector (400) includes a liquid inlet (403) communicating with the inlet (401) and a liquid outlet (404) communicating with the outlet (402). The liquid inlet (403) communicates with the first collecting pipe (210) through a first connecting pipe (230), and the liquid outlet (404) communicates with the second collecting pipe (220) through a second connecting pipe (240). The power battery heat exchanger (1000) according to any one of claims 1 to 9.

11. A power battery system (2000) comprising a power battery (600), further comprising the power battery heat exchanger (1000) according to any one of claims 1 to 10, wherein the power battery heat exchanger (1000) is disposed on the surface of the power battery (600) and is configured to heat and / or cool the power battery (600).

12. An electric vehicle (3000) comprising the power battery system (2000) according to claim 11.

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