TWM574763U - Battery pack case with heat exchange function and battery pack - Google Patents

Abstract

The present invention provides a battery pack case and a battery pack having a heat exchange function, and belongs to the technical field of batteries. The battery pack case of the present invention comprises a heat exchange substrate and a plurality of side plates fixed on the heat exchange substrate, wherein the heat exchange substrate and the plurality of side plates substantially surround the space for accommodating and fixing one or more battery modules a heat exchange substrate formed by assembling one or more heat exchange substrate units, each heat exchange substrate unit being of a unitary structure and having a plurality of first flow paths disposed therein; the side plates being of a unitary structure and having at least one of them disposed a second flow path; one or more heat exchange substrate units connecting the side plates and the heat exchange substrate by welding such that the first flow path and the plurality of second flow paths jointly form a heat exchange loop channel, wherein the heat exchange loop channel The liquid inlet and the liquid outlet are arranged on at least one side plate provided with the second flow path. The battery pack casing of the present invention has high material utilization rate, low cost, good expandability and good reliability.

Description

Battery pack case and battery pack with heat exchange function

The present invention belongs to the technical field of batteries, and relates to a battery pack case having a heat exchange function and a battery pack using the same.

In the current application of battery packs (also known as "battery power systems"), especially in the field of new energy electric vehicles, the battery pack is required to have a higher specific energy, and at the same time requires a higher safety factor and a longer service life; The high energy density battery pack will generate a certain amount of heat during operation. If the heat cannot be taken away in time, it will cause greater damage to the battery pack life and safety performance. Therefore, it is necessary to thermally manage the battery pack. For example, it is necessary to design a battery pack that ensures that the battery is maintained at a suitable temperature and is light in quality, thereby satisfying the high energy density of the entire battery pack and the lightweight requirements of the entire vehicle. With increasing competition, cost control and lightweighting of automotive design have become important indicators. In the traditional battery pack with battery liquid cooling system, its structure and its shortcomings are mainly manifested in the following aspects: (1) The cooling plate or cooling tube and the housing structure are separately designed, and then assembled to form a battery pack, material Low utilization rate and high processing cost; (2) The cooling tube is designed separately, and it is connected with the heat exchange substrate through the joint, increasing the risk of coolant leakage, increasing the manufacturing cost, and having certain requirements for the installation space; (3) The structure of the battery module or the battery pack in the battery pack changes (for example, if the battery pack is simply changed in size from the length and the width direction), the battery pack case needs to be redesigned and re-opened, and the processing cost is high. Poor portability.

The goal of the present invention is to disclose a solution that eliminates or at least mitigates the deficiencies described above that occur in prior art solutions. The object of the present invention is also to achieve one or more of the following advantages: - increasing the material utilization of the battery pack housing, reducing its manufacturing and processing costs; - avoiding the use of separate cooling tubes and joints; - improving the reliability of the battery pack housing - Improve the scalability of the battery pack housing; - Reduce the cost of developing different sizes of battery pack housings and shorten the development cycle. To achieve the above or other objects, the present invention provides the following technical solutions. According to an aspect of the present invention, a battery pack housing (100) having a heat exchange function includes a heat exchange substrate (5) and a plurality of side plates (3, 4, fixed to the heat exchange substrate (5), 8), wherein the heat exchange substrate (5) and the plurality of side plates (3, 4, 8) substantially surround a cavity (101) for receiving and fixing one or more battery modules (2); The heat exchange substrate (5) is assembled by one or more heat exchange substrate units (50), each of the heat exchange substrate units (50) being of a unitary structure and having a plurality of first flow paths (54) disposed therein The side plates (3, 4, 8) are of unitary structure and at least one of them is provided with a second flow path (43, 84); the side plates (3, 4, 8) and the heat exchange are connected by welding One or more heat exchange substrate units (50) of the substrate (5) such that the first flow path (54) and the plurality of the second flow paths (43, 84) together form a heat exchange loop channel ( 10), wherein the liquid inlet (91) and the liquid outlet (92) of the heat exchange loop passage (10) are disposed on at least one side plate (3) provided with the second flow passage (43, 84) , 4, 8). A battery pack case (100) according to an embodiment of the present invention, wherein the heat exchange substrate unit (50) and its first flow path (54) are integrally molded by extrusion, and the side plates (3, 4, 8) It is integrally molded by extrusion. A battery pack case (100) according to an embodiment of the present invention, wherein the heat exchange substrate unit (50) of a corresponding size suitable for the size of the cavity (101) is formed by cutting after extrusion molding. And the side panels (3, 4, 8). A battery pack case (100) according to an embodiment of the present invention, wherein the number and/or size of the heat exchange substrate units (50) is determined according to the size of the cavity (101). A battery pack case (100) according to an embodiment of the present invention, wherein the size of the side plates (3, 4, 8) is determined according to the size of the cavity (101). A battery pack case (100) according to an embodiment of the present invention, wherein the size of the cavity (101) is determined according to the number and/or size of the battery modules (2) that it accommodates. According to an embodiment of the present invention, a battery pack case (100) is provided with an reinforced heat exchange rib (55) on an inner surface of a first flow path (54) of the heat exchange substrate unit (50). A battery pack housing (100) according to an embodiment of the present invention, wherein the heat exchange substrate unit (50) includes support structural ribs (56) disposed between adjacent ones of the first flow passages (54). A battery pack case (100) according to an embodiment of the present invention, wherein a plurality of the first flow paths (54) of the heat exchange substrate unit (50) are arranged in parallel and penetrate the heat exchange substrate unit (50) ). A battery pack case (100) according to an embodiment of the present invention, wherein widths of a plurality of the first flow paths (54) of the heat exchange substrate unit (50) are configured to be the same or different; and/or different The width of the first flow path (54) of the heat exchange substrate unit (50) is configured to be the same or different. A battery pack case (100) according to an embodiment of the present invention, wherein the heat exchange substrate unit (50) is provided with a module mounting beam (52) and a mold for fixedly mounting the battery module (2) Group mounting holes (53). A battery pack case (100) according to an embodiment of the present invention, wherein the side plates (3, 4, 8) include two left and right side plates (4), a front side plate (8) and a rear side plate (3), The second flow path (43) is disposed in at least one of the two left and right side plates (4), and the second flow path is disposed in at least one of the front side plate (8) and the rear side plate (3) (84). A battery pack case (100) according to an embodiment of the present invention, wherein the left and right side plates (4) include an impact beam (47) projecting toward an outer side of the battery pack case (100). A battery pack case (100) according to an embodiment of the present invention, wherein a fixing hole (41) for integrally fixing the battery pack case (100) is provided on the impact beam (47). A battery pack case (100) according to an embodiment of the present invention, wherein heat exchange is provided on a side of the second flow path (43) of the left and right side plates (4) facing the heat exchange substrate (5) The substrate is connected to the groove (45). A battery pack case (100) according to an embodiment of the present invention, wherein the second flow path (84) of the front side panel (8) and/or the rear side panel (3) faces the left and right side panels (4) A second flow channel interface (83) is provided on one side. A battery pack case (100) according to an embodiment of the present invention, wherein a liquid inlet notch (81) is provided on an outer side wall of at least one of the side plates (3, 4, 8), the liquid inlet slot (81) The inlet and outlet structure (9) is installed on it. A battery pack case (100) according to an embodiment of the present invention, wherein the inlet and outlet structure (9) is provided with the liquid inlet (91), the liquid outlet (92), and a liquid separator ( 93), wherein the liquid partition (93) projects into the second flow path (43, 84) of the side plates (3, 4, 8). A battery pack case (100) according to an embodiment of the present invention, wherein a top end of the side plates (3, 4, 8) is provided with a seal groove (82) for accommodating a sealant. A battery pack case (100) according to an embodiment of the present invention, wherein the battery pack case (100) further includes a cover plate (1), the cover plate (1) sealing the space by the sealant Cavity (101). A battery pack case (100) according to an embodiment of the present invention, wherein at least one of the side plates (3, 4, 8) is provided with a plurality of hollow grooves (44, 85) and the hollow groove (44, 85) between the ribs (46, 86). A battery pack case (100) according to an embodiment of the present invention, wherein the heat exchange substrate unit (50) and its first flow path (54) are integrally molded by extrusion of aluminum, the side plates (3, 4, 8) One-piece molding by aluminum extrusion. A battery pack case (100) according to an embodiment of the present invention, wherein the welding is friction stir welding or laser welding. A battery pack case (100) according to an embodiment of the present invention, further comprising a heat shield (6) disposed under the heat exchange substrate (5). A battery pack case (100) according to an embodiment of the present invention, wherein at least a portion of the second flow path (43, 84) is internally provided with a flow damping member. According to still another aspect of the present invention, a battery pack is provided, comprising: the battery pack case (100) of any of the above; and a cavity (101) fixed in the battery pack case (100) One or more battery modules (2). In the battery pack case of the present invention, the first flow path and the second flow path for forming the heat exchange loop passage are respectively integrated in the heat exchange substrate of the integral structure and the side plate of the monolithic structure, thereby avoiding the use of separate cooling. The pipe and the joint improve the material utilization rate of the battery case and reduce the manufacturing and processing cost thereof, and the reliability is good, the risk of leakage of the coolant is small, the installation space of the battery case is reduced, and the maintenance cost is reduced; The package housing has good expandability, and the battery case of different sizes is developed with low cost and short cycle.

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which FIG. However, the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. In the drawings, the same reference numerals are used to refer to the same elements or components, and the description thereof will be omitted. Herein, the terms "upper", "lower", "front", "back", "left", "right", etc. are defined relative to the orientation of the battery pack in FIG. 1, and should It is understood that these directional terms are relative concepts, which are used for relative description and clarification, rather than limiting the orientation of any embodiment to a particular orientation or orientation, and that the corresponding orientations of the various terms may be based on the battery envelope. The orientation of the body placement changes accordingly. FIG. 1 is a schematic structural view of a battery pack case according to an embodiment of the present invention. FIG. 1 also shows a development view of a battery pack (or a power battery system) according to an embodiment of the present invention and a battery pack case 100 used therein, wherein the battery pack 2 inside the battery pack is not shown. Components such as electrical connection components and control detection units. The battery pack can be used as a power battery system for an electric vehicle, and is fixed to an electric vehicle to provide energy for components such as motors. The battery pack case 100 mainly includes a heat exchange substrate 5 and a plurality of side plates fixed to the heat exchange substrate 5, wherein the heat exchange substrate 5 and the plurality of side plates substantially surround the cavity 101 to form one of the energy storage components or The plurality of battery modules 2 are fixed in the cavity 101. Therefore, the shape and size of the cavity 101 can be determined according to factors such as the number, size, and shape of the battery module 2. For example, the battery can be determined in advance according to the vehicle type or the like. The size, size, number, and the like of the module 2 can be used to determine the size of the cavity 101 to be formed. As shown in FIG. 1, the heat exchange substrate 5 can be used as a bearing member of the battery module 2, and a cover plate 1 (for example, a cover on the casing) can be disposed on the opposite side thereof to close the cavity 101. The cover plate 1 can be integrally stamped and formed by using a good heat conductive material (for example, aluminum material), and during the molding process, the reinforcing rib 11, the mounting side 12, the mounting hole 13, and the like as shown in FIG. 1 are simultaneously formed. As shown in FIG. 1, in an embodiment, the cavity 101 is substantially block-shaped, and the side plates for surrounding the cavity 101 are mainly composed of a left side plate, a right side plate, a front side plate 8, and a rear side plate 3, wherein the left side plate The right side plate has a structure that is completely symmetrical in the direction, and therefore, is labeled 4, that is, the left and right side plates 4. Specifically, the battery pack case 100 further includes a heat insulating plate 6, a blocking plate 7, and an inlet and outlet port structure 9 provided on the front side plate 8. The heat shield 6 is placed below the heat exchange substrate 5, and the heat for isolating the battery pack case 100 is transferred to other components of the electric vehicle or the outside. As shown in FIG. 1, one rear side plate 3, two left and right side plates 4, one front side plate 8, one heat exchange substrate 5, one heat insulation plate 6, one inlet and outlet structure 9 and a plurality of blocking plates 7 are basically The battery lower case constituting the battery pack case 100 may be fixedly connected by a welding method such as friction stir welding or laser welding. The cover plate 1 constitutes a battery upper case of the battery pack case 100, and its mounting manner will be exemplified hereinafter. The main components of the battery pack case 100 of the present embodiment will be further described below with reference to FIGS. 2 through 6. FIG. 2 shows one of the heat exchange substrate units 50 of the heat exchange substrate 5. The heat exchange substrate 5 may be assembled by one or more heat exchange substrate units 50, the number and/or size of which is determined according to the size of the cavity 101 formed by the heat exchange substrate 5. Each heat exchange substrate unit 50 has a monolithic structure and is provided with a plurality of first flow channels 54 . As shown in FIG. 2 , each heat exchange substrate unit 50 has a heat exchange surface 51 for fixing the battery module 2 . The module mounting beam 52 and the module mounting hole 53, and the first flow path 54, the reinforcing heat exchange rib 55, and the support structure rib 56. Wherein, the heat exchange surface 51 is in contact with the bottom of the battery module 2 through the heat conductive material, exchanges heat with the battery module 2, thereby heating or cooling the same, and the reinforcing heat exchange rib 55 on the inner surface of the first flow path 54 can be strengthened. The heat exchange between the heat exchange surface 51 and the battery module 2 improves the heating or cooling efficiency; the battery module 2 is mounted on the module mounting beam 52 of the heat exchange substrate 5 at the bottom, specifically, for example, by bolts to The module mounting hole 53 is used to lock the battery module 2, so that the heat exchange substrate 5 not only serves as a load-bearing structural member of the battery module 2, but also has a heat exchange function. In one embodiment, the heat exchange substrate unit 50 can be integrally formed by extrusion using, but not limited to, aluminum or the like, which not only has high strength, but also has good thermal conductivity, simple processing, high material utilization rate, and low cost. In the process of extrusion molding, the heat exchange surface 51, the module mounting beam 52, the first flow path 54, the reinforcing heat exchange rib 55, the support structure rib 56, and the like may be formed together. Wherein, the plurality of first flow channels 54 may be arranged, for example, in parallel and penetrate the heat exchange substrate unit 50, which occupies a main area of the heat exchange substrate unit 50, thereby not only high heat exchange efficiency, but also high material utilization rate, adjacent Supporting structural ribs 56 are provided between the first-class lanes 54. The number, specific arrangement, and the like of the first flow path 54 are not limited. It is to be understood that when the plurality of heat exchange substrate units 50 are assembled to form the heat exchange substrate 5, the plurality of first flow paths 54 of the plurality of heat exchange substrate units 50 are Correspondingly, the flow paths inside the heat exchange substrate 5 can be formed. In an embodiment, the left and right side panels 4 of the battery pack case 100 are as shown in FIG. 3, which are left side panels or right side panels. The left and right side panels 4 are of a unitary structure and at least one of them is provided with a second flow passage 43. In an embodiment, the left and right side panels 4 have a level portion and a vertical portion as a side wall, which is substantially an inverted T-shaped structure. In an embodiment, the second flow path 43 is disposed in the level portion of the left and right side plates 4, and the heat exchange substrate connection groove 45 is disposed on the side of the second flow path 43 facing the heat exchange substrate 5, and the left and right side plates 4 are left and right. One symmetry is provided, and the heat exchange substrate 5 is connected through the heat exchange substrate connecting groove 45, so that the second flow path 43 in the left and right side plates 4 can communicate with the first flow path 54 in the heat exchange substrate 5, and can be commonly used to form The heat exchange loop passage 10 is shown in FIG. In an embodiment, the leveling portions of the left and right side panels 4 include anti-collision beams 47 projecting toward the outside of the battery pack housing. On the anti-collision beam 47, a plurality of fixing holes 41 may be provided, and the fixing holes 41 are used for the battery. The package housing 100 is mounted and fixed to the entire vehicle. Therefore, the impact beam 47 can function to integrally support the battery pack and prevent collision. Continuing with FIG. 3, in an embodiment, the top end of the vertical portion of the left and right side panels 4 is provided with a sealing groove 42. Before the cover plate 1 is installed, a sealant can be applied to the sealing groove 42 to realize the upper casing and the battery. The seal of the lower casing. In order to realize the overall light structure, a plurality of hollow grooves 44 may be disposed in the anti-collision beam 47 and the vertical portion of the level portion of the left and right side plates 4, and reinforcing ribs 46 may be disposed between the hollow grooves 44 to ensure the structural strength of the left and right side plates 4. The left and right side panels 4 shown in FIG. 3 can be integrally formed by extrusion using, but not limited to, aluminum or the like, which not only has high strength, but also has simple processing, high material utilization rate, and low cost. In the process of extrusion molding, the anti-collision beam 47, the hollow groove 44, the second flow path 43, and the sealing groove 42 shown in FIG. 3 can be simultaneously formed, thereby forming a unitary structure, and if necessary, passing through the machine The processing method or the like forms the mounting hole 41 and the like, and the entire preparation process is simple. It is to be understood that the size of the left and right side panels 4 can be determined according to the size of the cavity 101. In the process of its extrusion, after extrusion molding, it can be cut according to the size, even if the size of the cavity 101 of the battery pack case 100 changes, it is not necessary to separately mold to form a mold for extrusion molding. You can adjust the size when cutting. Similarly, for the heat exchange substrate unit 50, it can also be cut and formed according to the size after extrusion molding, even if the size of the cavity 101 of the battery pack case 100 changes, no additional mold opening is required for extrusion. The one-piece mold can be adjusted when cutting. Therefore, the battery pack case 100 is excellent in expandability, and the cost and cycle of developing the battery pack case 100 of different sizes can be greatly reduced. In an embodiment, the structure of the front side panel 8 of the battery pack case 100 is as shown in FIG. 4, the front side panel 8 is of a unitary structure and a second flow path 84 is provided in at least one of them. The front side plate 8 further includes an inlet notch 81, a sealing groove 82, a second flow path connecting surface 83, a hollow groove 85 and a reinforcing rib 86; wherein, on the side of the second flow path 84 facing the left side plate and the right side plate A second flow channel interface 83 is provided, and the second flow path 84 of the front side plate 8 communicates with the second flow path 43 of the left side plate or the right side plate through the second flow path connection interface 83 and is sealed, so that it can be commonly used to form The heat exchange loop passage 10 shown in FIG. 6; the seal groove 82 may be disposed at the top end of the front side plate 8, and a sealant may be applied to the seal groove 82 before the cover plate 1 is installed to realize the upper battery case and the lower battery case. In order to realize the overall light structure, a plurality of hollow grooves 85 may be disposed in the front side plate 8, and reinforcing ribs 86 may be disposed between the hollow grooves 85 to ensure the structural strength of the front side plate 8, and therefore, the front side plate 8 has high strength. It can take into account both the structure and the function of circulating coolant. Continuing with Figure 4, the inlet slot 81 can be disposed on the outer side wall of the front side panel 8 for mounting the inlet and outlet structure 9 as shown in Figure 5. The front side panel 8 shown in FIG. 4 can be integrally molded by extrusion using, but not limited to, aluminum or the like, which not only has high strength, but also has simple processing, high material utilization rate, and low cost. In the process of extrusion molding, the sealing groove 82, the second flow path connecting surface 83, the hollow groove 85, the reinforcing ribs 86, and the like shown in FIG. 4 can be simultaneously formed, thereby forming a unitary structure, and the entire preparation process is simple. It should be noted that the rear side panel 3 may be substantially identical in structure to the front side panel 8, and is also integrally molded by extrusion. When both the inlet port and the outlet port are provided on the front side plate 8, the inlet notch 81 may not be provided on the outer side wall of the rear side plate 3. In other embodiments, the liquid inlet notch 81 may be disposed on the front side plate 8 and the rear side plate 3 according to the loopback manner of the heat exchange loop passage 10, or the liquid inlet slot 81 may be provided on the rear side plate 3. . The second flow passage interface 83 may not be disposed on the outer side wall of the rear side panel 3, and the second flow passage 84 in the rear side panel 3 does not participate in the formation of the heat exchange loop passage 10 as shown in FIG. It is to be understood that the dimensions of the rear side panel 3 and the front side panel 8 can be determined according to the size of the cavity 101. In the process of its extrusion, after extrusion molding, it can be cut according to the size, even if the size of the cavity 101 of the battery pack case 100 changes, it is not necessary to separately mold to form a mold for extrusion molding. You can adjust the size when cutting. In an embodiment, the inlet and outlet structure 9 is specifically as shown in FIG. 5, and includes a liquid inlet 91, a liquid outlet 92, a liquid partition 93 and a mounting slot 94; when the inlet and outlet structure 9 is installed, the installation slot The port 94 is sealingly engaged with the liquid inlet slot 81, and the liquid partition 93 extends into the second flow path 84 to substantially isolate the left and right portions of the second flow path 84 so that the liquid passes through the liquid inlet 91 and the liquid outlet 92 in the battery pack. The heat exchange loop passage 10 in the casing 100 flows. Specifically, the cavity 101 accommodates eight battery modules 2 as shown in FIG. 1 as an example to illustrate a specific embodiment. To form a cavity 101 of a corresponding size, the heat exchange substrate 5 is assembled using, for example, eight heat exchange substrate units 50. At the same time, two left and right side panels 4, two opposite front side panels 8 and one rear side panel 3, the corner joints of the front side panel 8 and the left and right side panels 4, or the corners of the rear side panel 3 and the left and right side panels 4 are used at the same time. At the joint, a plurality of blocking plates 7 are used, which are connected and sealed by friction stir welding or laser welding, thereby forming a battery lower case and substantially surrounding the cavity 101. In addition, the lower case of the battery is fixed on the heat insulation board 6 by bolt fixing or glue connection, and the heat insulation board 6 functions as a heat insulation of the battery pack, and reduces heat exchange between the battery pack and the outside. It should be noted that each heat exchange substrate unit 50 of the heat exchange substrate 5 can be integrally formed by extrusion of aluminum material, and has the characteristics of high strength structure and light quality, and the internal flow is formed with the first flow path 54. Therefore, the heat exchange The substrate 5 as a whole functions to fix and support the battery module 2, and can also heat or cool the battery module 2 to achieve heat exchange. In the present example, the left side plate or the right side plate 4, the front side plate 8 is an aluminum extruded profile, has a high strength structure and light quality characteristics, and has a flow passage for the circulation of the cooling liquid inside, which saves the cost of separately arranging the cooling pipe and avoids the cooling pipe. The reliability risk caused by the rupture and the like is greatly improved, and the anti-collision beam 47 simultaneously serves as a fixed support battery pack system and an anti-collision function. In the present embodiment, the left side plate or the right side plate 4, the front side plate 8 and the rear side plate 3 are respectively pressed out by the sealing grooves 42, 82 and 31, and the welded joints between the side plates can form a connected sealing groove. It is convenient for sealing between the cover 1 and the lower case of the battery. In this embodiment, the plates of the lower casing of the battery are connected by friction stir welding or laser welding to achieve high-strength structural sealing and connection, and form a sealed heat exchange loop passage 10. As shown in FIG. 6, in the heat exchange loop passage 10, a fluid such as water can be used as the coolant, and the flow direction of the coolant is as indicated by an arrow in FIG. 6, specifically, the coolant enters the battery envelope through the inlet 91. In the body 100, the second flow path 43 in the left and right side plates 4 on one side is subjected to flow distribution, and then flows to the first flow path 54 in the heat exchange substrate 5, and the coolant flowing in the first flow path 54 can be mainly used with the battery. The heat exchange of the module 2 is performed, for example, to heat or cool the battery module 2, and then merged through the second flow path 43 in the left and right side plates 4 on the other side, and further flows into the second flow path 84 of the front side plate 8, It flows out through the liquid outlet 92. Further, as shown in FIG. 6, the two left and right side plates 4, the front side plate 8, the rear side plate 3, the liquid partition plate 93, and the heat exchange substrate 5 together constitute a coolant flow boundary, and the coolant enters the front side plate 8 from the liquid inlet port 91. The second flow path 84, and then enters the second flow path 43 of the left and right side plates 4 on one side, the fluid is split in the second flow path 43, respectively into the different first flow paths 54 of the different heat exchange substrate units 50, and installed The plurality of battery modules 2 on the heat exchange substrate 5 are heated or cooled, and the coolant is collected in the second flow path 43 of the left and right side plates 4 on the other side, and flows into the second flow path 84 of the front side plate 8 through the liquid outlet. 92 flows out to achieve coolant circulation. The non-stop loop flow path of the coolant in the heat exchange loop passage 10 can continuously heat or cool the battery module 2 in the battery pack. It can be seen that the formation of the heat exchange loop passage 10 does not depend on a separate cooling pipe, nor does it need to provide a joint inside the battery pack casing 100, thereby effectively avoiding the use of the cooling pipe and the joint, thereby greatly reducing the risk of coolant leakage, and also The cost of the battery pack case 100 is reduced; the installation space of the battery pack case 100 is reduced, and the risk of the heat exchange loop passage 10 is small without requiring or reducing maintenance, and the maintenance cost of the battery pack case 100 is reduced. It should be noted that the second flow channel 43 and the second flow channel 84 mainly serve to communicate with different first flow channels 54 to jointly form the heat exchange loop channel 10, but the second flow channel 43 and the second flow channel The fluid in the middle flow passage of 84 also partially has a heat exchange function, and because of its small volume, it does not serve as a main body of heat exchange. It should be noted that the heat exchange loop passage 10 in the battery pack case 100 is substantially in the shape of a "U" as shown in FIG. 6. In other embodiments, by arranging the first flow path 43, the second flow path 43, The second flow path 84 or the like can make the heat exchange loop passage 10 in the battery pack casing 100 substantially "Z" or "S" type. In an embodiment, the corresponding flow damping structure or flow damping component is added to the second flow channel 43 in the left and right side plates 4 as needed, and different first flow paths 54 and/or different heat exchanges of the heat exchange substrate unit 50 can be adjusted. The width of the different first flow passages 54 of the substrate unit 50 realizes the overall flow distribution function in the battery pack casing 100, and can meet the heat exchange requirement when the battery module 2 is expanded. In an embodiment, the expandable heat exchange substrate 5 can be connected by a plurality of heat exchange substrate units 5 according to requirements, and the lengths of the left and right side plates 4, the front side plate 8, and the rear side plate 3 are also changed; 4. The number and cross-sectional dimensions of the second flow passages of the front side panel 8 and the rear side panel 3 can be specifically set to meet different needs. It should be noted that even if the size of the cavity 101 of the battery pack case 100 is changed, it is not necessary to separately mold to form a mold for extrusion molding, and the size of the heat exchange substrate unit 50 and the side plate may be adjusted during cutting. Therefore, the battery pack case 100 of the present embodiment is excellent in expandability, and it is not necessary to separately develop a mold for extrusion molding, and the like, and reduce the cost and cycle of developing the battery pack case 100 of different sizes or models. It should be noted that the battery pack case 100 of the present invention has a light overall weight, and therefore, the weight of the battery pack formed based thereon is also light, and when it is applied to an electric vehicle, it is advantageous to realize the lightweight requirement of the electric vehicle. . The above examples mainly illustrate the battery pack case and the battery pack of the present invention. Although only a few of the embodiments of the present invention have been described, it will be understood by those skilled in the art that the present invention can be embodied in many other forms without departing from the spirit and scope of the invention. The present examples and embodiments are to be considered as illustrative and not restrictive, and the invention may cover various modifications without departing from the spirit and scope of the invention as defined by the appended claims. With replacement.

100‧‧‧Battery pack housing

1‧‧‧ cover

2‧‧‧Battery module

3‧‧‧ rear side panel

4‧‧‧left side panel, right side panel

5‧‧‧heat exchange substrate

6‧‧‧ Thermal insulation board

7‧‧‧ blocking board

8‧‧‧ front side panel

9‧‧‧Inlet and outlet structure

11‧‧‧Strength

12‧‧‧Installation side

13‧‧‧Installation holes

101‧‧‧ cavity

50‧‧‧heat exchange substrate unit

51‧‧‧ heat exchange surface

52‧‧‧Modular mounting beams

53‧‧‧Module mounting holes

54‧‧‧First runner

55‧‧‧Enhanced heat exchange ribs

56‧‧‧Support structure ribs

31‧‧‧ Sealing groove

41‧‧‧Fixed holes

42‧‧‧sealing groove

43‧‧‧Second runner

44‧‧‧ hollow slot

45‧‧‧Heat exchange substrate connection groove

46‧‧‧ stiffeners

47‧‧‧Anti-collision beam

81‧‧‧Inlet slot

82‧‧‧ Sealing groove

83‧‧‧Second runner interface

84‧‧‧Second runner

85‧‧‧ hollow trough

86‧‧‧ stiffeners

91‧‧‧ inlet port

92‧‧‧liquid outlet

93‧‧‧Liquid partition

94‧‧‧Installing notches

The above and other objects and advantages of the present invention will be more fully understood from the aspects of the appended claims. 1 is a schematic structural view of a battery pack case according to an embodiment of the present invention. 2 is a schematic view showing the structure of a heat exchange substrate unit of a battery pack case according to an embodiment of the present invention. 3 is a schematic structural view of a left side panel or a right side panel of a battery pack case according to an embodiment of the present invention. 4 is a schematic structural view of a front side panel of a battery pack case according to an embodiment of the present invention. FIG. 5 is a schematic structural view of an inlet and outlet of a battery pack case according to an embodiment of the present invention. 6 is a schematic view of a heat exchange loop passage of a battery pack case according to an embodiment of the present invention.

Claims (25)

A battery pack case (100) having a heat exchange function, comprising a heat exchange substrate (5) and a plurality of side plates (3, 4, 8) fixed on the heat exchange substrate (5), wherein the change The thermal substrate (5) and the plurality of side plates (3, 4, 8) substantially surround a cavity (101) for receiving and fixing one or more battery modules (2); characterized in that the heat exchange The substrate (5) is assembled by one or more heat exchange substrate units (50), each of the heat exchange substrate units (50) being of a unitary structure and having a plurality of first flow passages (54) disposed therein; (3, 4, 8) is a monolithic structure and at least one of them is provided with a second flow path (43, 84); the side plates (3, 4, 8) and the heat exchange substrate (5) are joined by welding One or more heat exchange substrate units (50) such that the first flow passage (54) and the plurality of the second flow passages (43, 84) collectively form a heat exchange loop passage (10), wherein The liquid inlet (91) and the liquid outlet (92) of the heat exchange loop passage (10) are disposed on at least one side plate (3, 4, 8) provided with the second flow passage (43, 84) )on. The battery pack case (100) of claim 1, wherein the heat exchange substrate unit (50) and its first flow path (54) are integrally formed by extrusion, the side plates (3, 4) , 8) integrally formed by extrusion. The battery pack case (100) according to claim 2, wherein the heat exchange substrate unit of a corresponding size suitable for the size of the cavity (101) is formed by cutting after extrusion molding. (50) and the side panels (3, 4, 8). The battery pack case (100) of claim 1, wherein the number and/or size of the heat exchange substrate unit (50) is determined according to the size of the cavity (101). The battery pack case (100) of claim 1, wherein the size of the side plates (3, 4, 8) is determined according to the size of the cavity (101). The battery pack case (100) according to claim 1 or 4 or 5, wherein the cavity (101) is sized according to the battery module (2) it accommodates The quantity and / or size is determined. The battery pack case (100) according to the first aspect of the invention, wherein the inner surface of the first flow path (54) of the heat exchange substrate unit (50) is provided with a reinforcing heat exchange rib (55). The battery pack case (100) of claim 1, wherein the heat exchange substrate unit (50) comprises a support structure rib disposed between adjacent ones of the first flow paths (54) 56). The battery pack casing (100) of claim 1, wherein the plurality of the first flow passages (54) of the heat exchange substrate unit (50) are arranged in parallel and penetrate the heat exchange substrate Unit (50). The battery pack case (100) according to claim 1 or 9, wherein a width of a plurality of the first flow paths (54) of the heat exchange substrate unit (50) is configured to be the same Or different; and/or different widths of the first flow path (54) of the heat exchange substrate unit (50) are configured to be the same or different. The battery pack case (100) of claim 1, wherein the heat exchange substrate unit (50) is provided with a module mounting beam (52) for fixedly mounting the battery module (2). ) and module mounting holes (53). The battery pack casing (100) of claim 1, wherein the side panels (3, 4, 8) comprise two left and right side panels (4), a front side panel (8) and a rear side panel ( 3) the second flow path (43) is provided in at least one of the two left and right side plates (4), and the first side plate (8) and the rear side plate (3) are provided in at least one of the front side plates (8) Second runner (84). The battery pack case (100) according to claim 12, wherein the left and right side plates (4) include an anti-collision beam (47) protruding toward an outer side of the battery pack case (100). . The battery pack case (100) according to claim 13, wherein a fixing hole for fixing the battery pack case (100) integrally is provided on the impact beam (47). ). The battery pack case (100) according to claim 12, wherein a side of the second flow path (43) of the left and right side plates (4) facing the heat exchange substrate (5) is disposed There is a heat exchange substrate connecting groove (45). The battery pack casing (100) according to claim 12, wherein the second flow passage (84) of the front side panel (8) and/or the rear side panel (3) faces the left and right side panels A second flow channel interface (83) is provided on one side of (4). The battery pack case (100) of claim 1, wherein an inlet notch (81) is provided on an outer side wall of at least one of the side plates (3, 4, 8), the The inlet and outlet structure (9) is installed on the liquid tank port (81). The battery pack casing (100) according to claim 17, wherein the inlet and outlet structure (9) is provided with the liquid inlet (91), the liquid outlet (92), and a liquid. A partition (93), wherein the liquid partition (93) projects into the second flow path (43, 84) of the side plates (3, 4, 8). The battery pack case (100) of claim 1, wherein the top end of the side plate (3, 4, 8) is provided with a seal groove (82) for accommodating a sealant. The battery pack case (100) of claim 19, wherein the battery pack case (100) further comprises a cover plate (1), the cover plate (1) being sealed by the sealant The cavity (101). The battery pack case (100) according to claim 1, wherein at least one of the side plates (3, 4, 8) is provided with a plurality of hollow grooves (44, 85) and the hollow groove Reinforcing ribs (46, 86) between (44, 85). The battery pack case (100) of claim 2, wherein the heat exchange substrate unit (50) and the first flow path (54) thereof are integrally molded by extrusion of aluminum, the side plate (3) , 4, 8) extruded by aluminum extrusion. The battery pack case (100) of claim 1, further comprising a heat shield (6) disposed under the heat exchange substrate (5). The battery pack case (100) of claim 1, wherein at least a portion of the second flow path (43, 84) is provided with a flow damping member. A battery pack, comprising: the battery pack case (100) according to any one of claims 1 to 24; and a cavity fixed to the battery pack case (100) ( One or more battery modules (2) in 101).