Battery assembly and vehicle having same

Abstract

A battery assembly and a vehicle having same. The battery assembly comprises: battery packs (2), the battery packs (2) being arranged in sequence in a first direction, and each battery pack (2) being provided with multiple battery cells (60) arranged in sequence in a second direction; a heat exchange plate (1) is provided with a water inlet (10), a water outlet (20), a water inlet flow path in communication with the water inlet (10), and a water outlet flow path in communication with the water outlet (20); the heat exchange plate (1) is provided with heat exchange areas corresponding to the multiple battery packs (2); multiple branch flow paths corresponding to each of battery packs (2) are arranged in the heat exchange areas, the upstream end of each branch flow path is communicated with the water inlet flow path, and the downstream end of each branch flow path is communicated with the water outlet flow path.

Description

Battery assembly and vehicle having the same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202311871296.X and application date December 29, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to, but is not limited to, the field of battery assemblies, and in particular to a battery assembly and a vehicle having the same. Background Art

[0004] In the related art, a battery assembly includes a heat exchange plate and multiple battery cells. The heat exchange plate is suitable for contacting the multiple battery cells to cool or heat the multiple battery cells. In the prior art, multiple cooling zones are provided in the heat exchange plate, each cooling zone is provided with a cooling channel, and the multiple cooling channels are independent of each other, so as to avoid the coolant being heated in the flow direction when the battery system is charging and discharging, thereby ensuring the temperature consistency of the entire battery pack. However, in the above-mentioned setting method, the heat exchange efficiency of the heat exchange plate for the battery pack is poor, resulting in low working stability of the battery assembly. Summary of the Invention

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] One purpose of the present application is to provide a battery assembly that improves the heat exchange effect of the battery pack, makes the temperature of the battery pack more stable during operation, and improves the operating stability of the battery assembly.

[0007] Another object of the present application is to provide a vehicle.

[0008] According to the battery assembly of the present application, it includes: a battery pack, the battery pack is constructed as a plurality of battery cells arranged in sequence in a first direction and each battery pack is provided with a plurality of battery cells arranged in sequence in a second direction; a heat exchange plate, the heat exchange plate is provided with a water inlet and a water outlet and a water inlet flow path connected to the water inlet and a water outlet flow path connected to the water outlet, the heat exchange plate is provided with heat exchange areas corresponding to the plurality of battery packs, and a plurality of branch flow paths corresponding to each battery pack are provided in the heat exchange area, the upstream end of the branch flow path is connected to the water inlet flow path, and the downstream end of the branch flow path is connected to the water outlet flow path.

[0009] According to the battery assembly of the present application, multiple heat exchange zones are set in its heat exchange plate, one heat exchange zone is set corresponding to multiple battery packs and one battery pack is set with multiple branch flow paths, and the multiple branch flow paths are suitable for heating or cooling the battery pack, which improves the heat exchange effect of the battery pack, so that the temperature of the battery pack is more stable during operation, and the working stability of the battery assembly is improved.

[0010] The vehicle according to the present application includes the above-mentioned battery assembly.

[0011] According to the vehicle of the present application, the battery of the vehicle has good operating stability, so that the vehicle has good power performance.

[0012] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application.

[0013] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of an outlet flow path, an inlet flow path, a branch flow path, and a battery assembly according to an embodiment of the present application;

[0015] FIG2 is a front view of a heat exchange plate according to an embodiment of the present application;

[0016] FIG3 is a schematic diagram of a first heat exchange zone according to an embodiment of the present application;

[0017] FIG4 is a schematic diagram of a second heat exchange zone according to an embodiment of the present application;

[0018] FIG5 is a schematic diagram of a third heat exchange zone according to an embodiment of the present application;

[0019] FIG6 is a schematic diagram of a fourth heat exchange zone according to an embodiment of the present application;

[0020] FIG7 is a schematic diagram of a battery pack and a heat exchange plate according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In this application, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] In the related art, a battery assembly includes a heat exchange plate and multiple battery cells. The heat exchange plate is suitable for contacting the multiple battery cells to cool or heat the multiple battery cells. In the prior art, multiple cooling zones are provided in the heat exchange plate, each cooling zone is provided with a cooling channel, and the multiple cooling channels are independent of each other, so as to avoid the coolant being heated in the flow direction when the battery system is charging and discharging, thereby ensuring the temperature consistency of the entire battery pack. However, in the above-mentioned setting method, the heat exchange efficiency of the heat exchange plate for the battery pack is poor, resulting in low working stability of the battery assembly.

[0027] The battery assembly according to an embodiment of the present application is described below with reference to Figures 1 to 7.

[0028] As shown in Figures 1 to 7, the battery assembly according to the present application includes: a battery group 2 and a heat exchange plate 1, the battery group 2 is constructed as a plurality of battery cells 60 arranged in sequence in a first direction, and each battery group 2 is provided with a plurality of battery cells 60 arranged in sequence in a second direction, the heat exchange plate 1 is provided with a water inlet 10 and a water outlet 20, and a water inlet flow path connected to the water inlet 10 and a water outlet flow path connected to the water outlet 20, the heat exchange plate 1 is provided with heat exchange areas corresponding to the plurality of battery groups 2, and a plurality of branch flow paths corresponding to each battery group 2 are provided in the heat exchange area, the upstream end of the branch flow path is connected to the water inlet flow path, and the downstream end of the branch flow path is connected to the water outlet flow path.

[0029] In some embodiments, the first direction can be configured as the length direction of the battery assembly, the second direction can be configured as the width direction of the battery assembly, and the third direction can be configured as the height direction of the battery assembly. The plurality of battery cells 60 are arranged in sequence in the second direction to form a battery pack 2. The battery assembly includes a plurality of battery packs 2, and the plurality of battery packs 2 are arranged in sequence in the second direction. The battery assembly also includes a heat exchange plate 1, which is arranged on one side of the plurality of battery packs 2 in the third direction, and the plurality of battery cells 60 are respectively stopped against the heat exchange plate 1 to make the heat exchange plate 1 can heat or cool multiple battery cells 60. Multiple heat exchange areas are formed in the heat exchange plate 1. One heat exchange area corresponds to multiple battery packs 2. Multiple branch flow paths are formed in each heat exchange area. One battery pack 2 corresponds to multiple branch flow paths. A water inlet flow path and a water outlet flow path are formed in the heat exchange plate 1. The heat exchange plate 1 is also provided with a water inlet 10 and a water outlet 20. One end of the water inlet flow path is connected to the water inlet 10 and the other end is connected to the upstream end of the branch flow path. One end of the water outlet flow path is connected to the water outlet 20 and the other end is connected to the downstream end of the branch flow path.

[0030] It can be understood that the coolant flows out from the water outlet 20 after passing through the water inlet 10, the water inlet flow path, the branch flow path and the water outlet flow path in sequence. The coolant exchanges heat with multiple battery cells 60 during the flow process. A heat exchange area corresponds to multiple battery packs 2, and one battery pack 2 corresponds to multiple branch flow paths. The coolant flowing in the multiple branch flow paths can exchange heat with the battery pack 2, thereby improving the heat exchange effect of the battery pack 2. It is worth mentioning that when the battery pack 2 is working, the working temperature of the battery pack 2 will affect the working efficiency of the battery pack 2. Therefore, the above-mentioned setting can make the temperature of the battery pack 2 more stable during operation, and make the working efficiency of the battery pack 2 more stable, thereby improving the working stability of the battery assembly.

[0031] According to the battery assembly involved in the present application, multiple heat exchange zones are set in its heat exchange plate 1, one heat exchange zone is set corresponding to multiple battery packs 2, and one battery pack 2 is set with multiple branch flow paths. The multiple branch flow paths are suitable for heating or cooling the battery pack 2, which improves the heat exchange effect of the battery pack 2, thereby making the temperature of the battery pack 2 more stable during operation, and improving the working stability of the battery assembly.

[0032] According to some embodiments of the present application, as shown in Figures 1 to 5, in a heat exchange area, multiple branch flow paths extend along the second direction and are spaced apart in the first direction, the coolant in at least one branch flow path flows along the first flow direction, and the coolant in at least another branch flow path flows along the second flow direction, and the first flow direction is opposite to the second flow direction.

[0033] In some embodiments, the branch flow path extends in the second direction, and multiple branch flow paths are spaced apart in the first direction. It can be understood that the coolant enters from the water inlet 10 and flows through the water inlet flow path, the branch flow path and the water outlet flow path in sequence before being discharged from the water outlet 20. The coolant exchanges heat with the battery pack 2 during the flow process. Therefore, as the coolant flows, the heat loss of the coolant gradually increases. The increase in the heat loss of the coolant will reduce the heat exchange effect on the battery cell 60. By allowing the coolant to flow along the first flow direction in some branch flow paths, and the coolant to flow along the second flow direction in some branch flow paths, and at the same time, the first flow direction is opposite to the second flow direction, it can be avoided that some battery cells 60 in the heat exchange area have good heat exchange effects and some battery cells 60 have poor heat exchange effects, so that the heat exchange plate 1 can more evenly exchange heat with multiple battery cells 60 in the heat exchange area.

[0034] In some embodiments, within a heat exchange zone, at least some adjacent branch flow paths have opposite flow directions and are connected to each other. Thus, the above-mentioned arrangement allows the coolant to flow continuously within the heat exchange zone, preventing the coolant from directly entering the outlet flow path after passing through a branch flow path, thereby extending the time the coolant stays in the heat exchange zone and improving the utilization rate of the coolant.

[0035] According to some embodiments of the present application, as shown in FIG. 1 to FIG. 6 , the number of branch flow paths along the first flow direction is i1, and the number of branch flow paths along the second flow direction is i2, satisfying: 0.3≤i1 / i2≤1.

[0036] In some embodiments, the flow directions of at least some adjacent branch flow paths are the same, and the flow directions of at least some adjacent branch flow paths are opposite. As an example, among the four branch flow paths arranged in sequence in the first direction, the branch flow paths located on both sides of the first direction are respectively constructed as the first flow channel and the second flow channel, and the two branch flow paths located between the first flow channel and the second flow channel are respectively constructed as the third flow channel. The flow direction of the coolant in the two third flow channels is the first flow direction, and the flow direction of the coolant in the first flow channel and the second flow channel is the second flow direction. One end on the same side of the two third flow channels is connected to the first flow channel, and the other end on the same side of the two third flow channels is connected to the second flow channel. It satisfies: 0.3≤i1 / i2≤1, and there is no limitation here. Therefore, through the above setting, multiple branch flow paths can be connected in series with each other. The connection and / or parallel connection prolongs the residence time of the coolant in the heat exchange zone and improves the heat exchange effect of the coolant on the battery pack 2. At the same time, it can be understood that the flow of the coolant along the first flow direction or the second flow direction will cause the heat exchange effect of the coolant to gradually decrease in the flow direction of the coolant, resulting in a phenomenon in which some battery cells 60 in a battery pack 2 have good heat exchange effects and some battery cells 60 have poor heat exchange effects. Therefore, by allowing the coolant to flow along the first flow direction and the second flow direction in multiple branch flow paths respectively, a more balanced heat exchange of the multiple battery cells 60 of the battery pack 2 can be achieved, thereby improving the heat exchange effect of the battery pack 2, making the temperature of the battery pack 2 more stable during operation, thereby making the working efficiency of the battery pack 2 more stable, and further improving the working stability of the battery assembly.

[0037] According to some embodiments of the present application, as shown in Figures 1 to 6, multiple branch flow paths include: a first branch flow path 31, a second branch flow path 32 and a third branch flow path 33, the first branch flow path 31 and the second branch flow path 32 are respectively arranged on both sides of the heat exchange zone in the first direction, and the third branch flow path 33 is constructed to be connected to each other, and the multiple branch flow paths are arranged between the first branch flow path 31 and the second branch flow path 32; wherein the first branch flow path 31 and the second branch flow path 32 are connected through multiple third branch flow paths 33, wherein in at least one heat exchange zone, the first branch flow path 31 is connected to the water inlet flow path, and the second branch flow path 32 is connected to the water outlet flow path, and / or the first branch flow path 31 and the second branch flow path 32 of at least one heat exchange zone are connected to the water inlet flow path, and at least one third branch flow path 33 is connected to the water outlet flow path.

[0038] In some embodiments, in multiple heat exchange zones, one end of the first branch flow path 31 and one end of the second branch flow path 32 in at least one heat exchange zone are connected to the water inlet flow path, and the other end of the first branch flow path 31 and the other end of the second branch flow path 32 are respectively connected to at least one third branch flow path 33. Among the multiple third branch flow paths 33, the third branch flow path 33 connected to the first branch flow path 31 and the third branch flow path 33 connected to the second branch flow path 32 are respectively connected to the outlet flow path. Of course, it can also be that one end of one of the multiple third branch flow paths 33 is respectively connected to the first branch flow path 31 and the second branch flow path 32, and the other end of the third branch flow path 33 is connected to the outlet flow path. There is no limitation here.

[0039] It is understood that within a heat exchange zone, the portion of the battery pack 2 near the periphery of the heat exchange zone is configured as an edge portion. Because the edge portion has a larger contact area with the external environment, when the heat exchange plate 1 heats multiple battery packs 2, heat loss from the edge portion is greater, resulting in lower heating efficiency of the heat exchange plate 1 for the battery packs 2. When the heat exchange plate 1 is suitable for heating the battery packs 2, the coolant begins to heat the multiple battery assemblies corresponding to the heat exchange zone from the first branch flow path 31 and the second branch flow path 32. The first branch flow path 31 and the second branch flow path 32 correspond to the edge portion, respectively. Since the coolant experiences less heat loss when flowing through the first branch flow path 31 and the second branch flow path 32, the first branch flow path 31 and the second branch flow path 32 have a better heating effect on the edge portion. Therefore, this arrangement can improve the heating effect on the edge portion and eliminate heat loss at the edge portion, thereby achieving more balanced heating of the battery packs 2 corresponding to the heat exchange zone by the coolant, improving the heating effect of the battery packs 2 corresponding to the heat exchange zone, and enhancing the cold start capability of the battery assemblies.

[0040] In some embodiments, among multiple heat exchange zones, the first branch flow path 31 in at least one heat exchange zone is connected to the water inlet flow path and the second branch flow path 32 is connected to the water outlet flow path. Therefore, after the coolant enters the heat exchange zone from the water inlet flow path, the coolant passes through the first branch flow path 31, the third branch flow path 33 and the second branch flow path 32 in sequence before entering the water outlet flow path. The coolant flow path is simple, which simplifies the setting method of the first branch flow path 31, the second branch flow path 32 and the third branch flow path 33 in the heat exchange zone, improves the production efficiency of the heat exchange plate 1, and at the same time, extends the residence time of the coolant in the heat exchange zone, thereby improving the utilization rate of the coolant.

[0041] It is worth mentioning that the first branch flow paths 31 can be constructed as multiple ones connected in parallel to each other. As an example, the first branch flow paths 31 are constructed as two. One ends of the two first branch flow paths 31 on the same side are respectively connected to one end of the third branch flow path 33, and the other ends of the two first branch flow paths 31 on the same side are respectively connected to the water inlet flow path. Similarly, the second branch flow paths 32 can be constructed as multiple ones connected in parallel to each other. As an example, the second branch flow paths 32 are constructed as two. One ends of the two second branch flow paths 32 on the same side are respectively connected to one end of the third branch flow path 33, and the other ends of the two second branch flow paths 32 on the same side are respectively connected to the water outlet flow path.

[0042] According to some embodiments of the present application, as shown in FIGS. 1-6, the multiple heat exchange areas include: a first heat exchange area, a second heat exchange area, a third heat exchange area, and a fourth heat exchange area. The first heat exchange area and the second heat exchange area are spaced apart in the second direction. The first heat exchange area and the third heat exchange area are spaced apart in the first direction. The fourth heat exchange area and the third heat exchange area are spaced apart in the second direction and the fourth heat exchange area and the second heat exchange area are spaced apart in the first direction. The water inlet 10 is arranged in the first heat exchange area, and the water outlet 20 is arranged in the third heat exchange area.

[0043] It can be understood that the first heat exchange area, the second heat exchange area, the third heat exchange area, and the fourth heat exchange area are arranged in a "field" shape on the heat exchange plate 1. The multiple heat exchange areas are compact and regular in layout, which improves the utilization rate of the heat exchange plate 1, simplifies the manufacturing process of the heat exchange plate 1, and improves the production efficiency of the heat exchange plate 1.

[0044] In some embodiments, the water inlet 10 is arranged in the first heat exchange area and the water outlet 20 is arranged in the third heat exchange area. Thus, the coolant can enter the water inlet flow path from the water inlet 10, exchange heat with the first heat exchange area, then return to the third heat exchange area through the water outlet flow path, and finally be discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area and the third heat exchange area. The coolant can enter the second heat exchange area through the water inlet flow path, exchange heat with the second heat exchange area, then return to the third heat exchange area through the water outlet flow path, and finally be discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area, the second heat exchange area, and the third heat exchange area. It can also be that the coolant enters the third heat exchange area through the water inlet flow path, exchanges heat with the third heat exchange area, and then is discharged through the water outlet flow path and the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area and the third heat exchange area. It can also be that the coolant enters the fourth heat exchange area through the water inlet flow path, exchanges heat with the fourth heat exchange area, then returns to the third heat exchange area through the water outlet flow path, and finally be discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area, the fourth heat exchange area, and the third heat exchange area. Thus, through the above settings, the residence time of the coolant in the heat exchange area can be prolonged, and the utilization rate of the coolant is improved.

[0045] According to some embodiments of the present application, as shown in Figures 1 to 6, the water inlet flow path includes: a first water inlet flow path 41, a second water inlet flow path 42 and a third water inlet flow path 43. One end of the first water inlet flow path 41 is connected to the water inlet 10, and at least a portion of the first water inlet flow path 41 is arranged at the periphery of the first heat exchange zone. The other end of the first water inlet flow path 41 is connected to the first branch flow path 31 and the second branch flow path 32 of the second heat exchange zone. Thus, the coolant enters the second heat exchange zone after flowing through the periphery of the first heat exchange zone, and in the first direction, the coolant starts to exchange heat with the second heat exchange zone from both sides of the second heat exchange zone. It can be understood that as the coolant flows, the heat loss of the coolant gradually increases. Therefore, the heat loss of the coolant when flowing in the first branch flow path 31 and the second branch flow path 32 of the second heat exchange zone is small. At this time, the cooling effect of the coolant on the edge is good. Therefore, through the above-mentioned arrangement, the heating effect of the edge of the battery pack 2 corresponding to the second heat exchange zone can be improved, thereby improving the cold start capability of the battery assembly.

[0046] One end of the second water inlet flow path 42 is connected to the water inlet 10, and the other end of the second water inlet flow path 42 is connected to the first branch flow path 31 and the second branch flow path 32 of the first heat exchange zone. Thus, in the first direction, the coolant starts to exchange heat with the first heat exchange zone from both sides of the first heat exchange zone, thereby improving the heating effect of the edge of the battery group 2 corresponding to the first heat exchange zone and improving the cold start capability of the battery assembly.

[0047] One end of the third water inlet flow path 43 is connected to the water inlet 10, and the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 of the third heat exchange zone. Therefore, after the coolant enters the third heat exchange zone from the third water inlet flow path 43, the coolant passes through the first branch flow path 31, the third branch flow path 33 and the second branch flow path 32 in sequence and is discharged. The coolant flow path is simple, which simplifies the arrangement of the first branch flow path 31, the second branch flow path 32 and the third branch flow path 33 in the third heat exchange zone. At the same time, the residence time of the coolant in the third heat exchange zone is extended, and the utilization rate of the coolant is improved; and / or, the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 and at least one third branch flow path 33 of the fourth heat exchange zone. At this time, in the first In terms of direction, the coolant enters the fourth heat exchange zone in two parts. One part of the coolant starts to exchange heat with the fourth heat exchange zone from one side of the fourth heat exchange zone, and is discharged when the coolant flows to the middle of the fourth heat exchange zone. The other part of the coolant starts to exchange heat with the fourth heat exchange zone from the middle of the fourth heat exchange zone, and is discharged when the coolant flows to the other side of the fourth heat exchange zone. At the same time, the third water inlet flow path 43 is arranged close to the other side of the fourth heat exchange zone. It can be understood that as the coolant flows, the heat loss of the coolant increases. Therefore, through the above-mentioned arrangement, it can be achieved that in the fourth heat exchange zone, the branch flow path with larger heat loss is adjacent to the branch flow path with smaller heat loss, so that the temperature in the fourth heat exchange zone is more balanced, thereby making the heat exchange of the battery pack 2 corresponding to the fourth heat exchange zone more balanced.

[0048] In some embodiments, one end of the third water inlet flow path 43 is connected to the water inlet 10, and the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 of the third heat exchange zone; in other embodiments, one end of the third water inlet flow path 43 is connected to the water inlet 10, and the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 of the fourth heat exchange zone and at least one third branch flow path 33; in other embodiments, one end of the third water inlet flow path 43 is connected to the water inlet 10, and the other end of the third water inlet flow path 43 is connected to the first branch flow path 31 of the third heat exchange zone. At the same time, the other end of the third water inlet flow path 43 is also connected to the first branch flow path 31 of the fourth heat exchange zone and at least one third branch flow path 33, which is not limited here.

[0049] According to some embodiments of the present application, as shown in Figures 1 to 6, the water outlet flow path includes: a first water outlet flow path 51, a second water outlet flow path 52, a third water outlet flow path 53 and a fourth water outlet flow path 54. One end of the first water outlet flow path 51 is connected to at least one third branch flow path 33 of the second heat exchange zone, and the other end of the first water outlet flow path 51 flows through the periphery of the fourth heat exchange zone and the third heat exchange zone in sequence and is connected to the water outlet 20. As a result, the coolant flows through the second heat exchange zone and then enters the first water outlet flow path 51. When the coolant flows in the first water outlet flow path 51, it can exchange heat with the edge of the fourth heat exchange zone and the third heat exchange zone, thereby improving The utilization rate of the coolant is improved. At the same time, it can be understood that the first water outlet flow path 51 collects the coolant in multiple branch flow paths in the second heat exchange zone. Therefore, the flow rate of the coolant in the first water outlet flow path 51 is greater than the flow rate of the coolant in the branch flow path of the second heat exchange zone. When the coolant flows in the first water outlet flow path 51 and exchanges heat with the edge parts of the fourth heat exchange zone and the third heat exchange zone, the large flow rate of the coolant in the first water outlet flow path 51 can improve the heating effect on the edge parts of the fourth heat exchange zone and the third heat exchange zone, so that the heat exchange plate 1 heats the multiple battery packs 2 more evenly, thereby improving the cold start capability of the battery assembly.

[0050] One end of the second water outlet flow path 52 is connected to at least one third branch flow path 33 of the first heat exchange zone, and the other end of the second water outlet flow path 52 flows through the periphery of the second heat exchange zone and the fourth heat exchange zone in sequence and is connected to the first water outlet flow path 51. As a result, the coolant flows through the first heat exchange zone and then enters the second water outlet flow path 52. When the coolant flows in the second water outlet flow path 52, it can exchange heat with the edge of the second heat exchange zone and the fourth heat exchange zone, thereby improving the utilization rate of the coolant. At the same time, the second water outlet flow path 52 is connected to the first water outlet flow path 51 in the fourth heat exchange zone, and the coolant flowing in the second water outlet flow path 52 enters the fourth heat exchange zone. The water flows into the first water outlet flow path 51 and flows back to the water outlet 20 through the first water outlet flow path 51, avoiding extending the second water outlet flow path 52 to connect with the water outlet 20, shortening the setting path of the second water outlet flow path 52, simplifying the manufacturing process of the heat exchange plate 1, and improving the production efficiency of the heat exchange plate 1. At the same time, the second water outlet flow path 52 collects the coolant in multiple branch flow paths in the first heat exchange area. Therefore, the flow rate of the coolant in the second water outlet flow path 52 is greater than the flow rate of the coolant in the branch flow path of the first heat exchange area, thereby improving the heating effect of the edge of the battery pack 2 corresponding to the second heat exchange area and the fourth heat exchange area respectively.

[0051] One end of the third water outlet flow path 53 is connected to the second branch flow path 32 of the third heat exchange zone, and the other end of the third water outlet flow path 53 flows through the periphery of the third heat exchange zone and is connected to the water outlet 20. As a result, the coolant can exchange heat with the edge of the third heat exchange zone when flowing in the third water outlet flow path 53, thereby improving the utilization rate of the coolant. At the same time, the third water outlet flow path 53 collects the coolant in multiple branch flow paths in the third heat exchange zone. As a result, the flow rate of the coolant in the third water outlet flow path 53 is greater than the flow rate of the coolant in the branch flow paths of the third heat exchange zone, thereby improving the heating effect of the edge of the battery pack 2 corresponding to the third heat exchange zone.

[0052] One end of the fourth water outlet flow path 54 is connected to the second branch flow path 32 and at least one third branch flow path 33 of the fourth heat exchange zone, and the other end of the fourth water outlet flow path 54 flows through the periphery of the fourth heat exchange zone and the periphery of the third heat exchange zone in sequence and is connected to the water outlet 20. Therefore, when the coolant flows in the fourth water outlet flow path 54, it can exchange heat with the edge parts of the fourth heat exchange zone and the third heat exchange zone, thereby improving the utilization rate of the coolant. At the same time, the fourth water outlet flow path 54 gathers the coolant in multiple branch flow paths in the fourth heat exchange zone. Therefore, the flow rate of the coolant in the fourth water outlet flow path 54 is greater than the flow rate of the coolant in the branch flow paths of the fourth heat exchange zone, thereby improving the heating effect of the edge parts of the battery pack 2 corresponding to the fourth heat exchange zone and the third heat exchange zone respectively.

[0053] According to some embodiments of the present application, as shown in Figures 1 to 6, the water inlet 10 is arranged on one side of the first heat exchange zone in the second direction, and the water outlet 20 is arranged on one side of the third heat exchange zone in the second direction. It can be understood that in the second direction, the water inlet 10 and the water outlet 20 are respectively arranged at the same end of the first heat exchange zone and the third heat exchange zone. In some embodiments, the water inlet 10 of the heat exchange plate 1 is connected to the cooling device through a first pipe, and the water outlet 20 of the heat exchange plate 1 is connected to the cooling device through a second pipe. Therefore, the above-mentioned arrangement can simplify the connection process between the heat exchange plate 1 and the cooling device. In some embodiments, in the first direction, the water inlet 10 is arranged on the side of the first heat exchange zone close to the third heat exchange zone, and the water outlet 20 is arranged on the side of the third heat exchange zone close to the first heat exchange zone. Therefore, when connecting the heat exchange plate 1 to the cooling device, the first pipe and the second pipe can be more conveniently connected to the water inlet 10 and the water outlet 20, respectively, further simplifying the connection process between the heat exchange plate 1 and the cooling device.

[0054] According to some embodiments of the present application, as shown in Figures 1-6, at least portions of the third water inlet flow path 43 and the third water outlet flow path 53 are disposed between the first heat exchange zone and the third heat exchange zone. It is understood that at least portions of the third water inlet flow path 43 can exchange heat with the edge of the first heat exchange zone, and at least portions of the third water outlet flow path 53 can exchange heat with the edge of the third heat exchange zone. Furthermore, the above arrangement allows at least portions of the third water inlet flow path 43 and at least portions of the third water outlet flow path 53 to be disposed adjacent to each other, thereby achieving a more balanced heat exchange at the edges of the battery pack 2 corresponding to the first and third heat exchange zones, respectively.

[0055] According to some embodiments of the present application, as shown in Figures 1-6, the ratio of the number of branch flow paths in the first heat exchange zone to the number of branch flow paths in the third heat exchange zone is P, and satisfies the following: 1.2≤P≤1.6. It can be understood that the first outlet flow path 51, the third outlet flow path 53, and the fourth outlet flow path 54 all pass through the third heat exchange zone and are connected to the water outlet 20 in the third heat exchange zone. Therefore, through the above-mentioned arrangement, the first outlet flow path 51, the third outlet flow path 53, the fourth outlet flow path 54, and the branch flow paths in the third heat exchange zone can be fully covered in the third heat exchange zone, thereby improving the utilization rate of the heat exchange plate 1 in the third heat exchange zone.

[0056] According to some embodiments of the present application, as shown in Figures 1 to 6, the flow resistance of the branch flow path in the first heat exchange zone is R1, the flow resistance of the branch flow path in the second heat exchange zone is R2, the flow resistance of the branch flow path in the third heat exchange zone is R3, and the flow resistance of the branch flow path in the fourth heat exchange zone is R4, satisfying: R1>R3>R2>R4.

[0057] In some embodiments, the flow rates of the coolant in the first heat exchange zone, the second heat exchange zone, the third heat exchange zone and the fourth heat exchange zone are Q1, Q2, Q3 and Q4 respectively. The greater the flow resistance of the branch flow path, the faster the flow rate of the coolant in the branch flow path, that is, the shorter the residence time of the coolant in the branch flow path, the smaller the flow rate of the branch flow path. As the coolant flows, the heat loss of the coolant gradually increases. It can be understood that the time when the coolant enters the first heat exchange zone is t1, the time when the coolant enters the second heat exchange zone is t2, the time when the coolant enters the third heat exchange zone is t3, and the time when the coolant enters the fourth heat exchange zone is t4. Compared with the third heat exchange zone, the water inlet 10 in the second heat exchange zone is The distance between the third heat exchange zones is smaller than the distance between the water inlet 10 and the second heat exchange zone, therefore, t3>t2. Compared with the fourth heat exchange zone, the distance between the water inlet 10 and the second heat exchange zone is equal to the distance between the water inlet 10 and the fourth heat exchange zone, that is, t2=t4. However, since the third heat exchange zone and the fourth heat exchange zone share the third water inlet 10, the efficiency of the coolant entering the second heat exchange zone is greater than the efficiency of the coolant entering the fourth heat exchange zone. Therefore, through the above setting, Q4>Q2>Q3>Q1 can be made, so that the heat exchange of the coolant to the battery group 2 corresponding to the first heat exchange zone, the second heat exchange zone, the third heat exchange zone and the fourth heat exchange zone is more balanced.

[0058] According to some embodiments of the present application, as shown in Figures 1 to 6, the cross-sectional area of ​​the branch flow path in the first heat exchange zone is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone is S4, satisfying: S4>S2>S3>S1. It is understood that the flow resistance of the coolant in the branch flow path can be controlled by setting a block or the like in the branch flow path, or by controlling the cross-sectional area of ​​the branch flow path to control the flow resistance of the coolant in the branch flow path, which is not limited here. Therefore, by setting S4>S2>S3>S1, R1>R3>R2>R4 can be achieved, thereby achieving Q4>Q2>Q3>Q1.

[0059] The vehicle according to the present application is briefly described below.

[0060] The vehicle according to the present application is provided with the battery assembly of the above-mentioned embodiment. Since the vehicle according to the present application is provided with the battery assembly described in any one of the above-mentioned embodiments, the battery of the vehicle has good operating stability, so that the vehicle has good power performance.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0062] While embodiments of the present application have been shown and described above, changes, modifications, substitutions, and variations may be made to the embodiments described above.

Claims

1. A battery assembly, wherein, Comprising: A battery pack (2), the battery pack (2) being configured with a plurality of battery cells (60) arranged in sequence in a first direction, and each of the battery packs (2) being provided with a plurality of battery cells (60) arranged in sequence in a second direction; A heat exchange plate (1), the heat exchange plate (1) being provided with a water inlet (10) and a water outlet (20), an incoming water flow path connected to the water inlet (10), and an outgoing water flow path communicating with the water outlet (20). The heat exchange plate (1) is provided with a heat exchange area corresponding to the plurality of battery packs (2), and a plurality of branch flow paths corresponding to each of the battery packs (2) are arranged in the heat exchange area. The upstream end of the branch flow path is connected to the incoming water flow path, and the downstream end of the branch flow path is connected to the outgoing water flow path.

2. The battery assembly according to claim 1, wherein, In one of the heat exchange areas, the plurality of branch flow paths respectively extend in the second direction and are spaced apart in the first direction. The coolant in at least one of the branch flow paths flows in a first flow direction, and the coolant in at least another branch flow path flows in a second flow direction, and the first flow direction is opposite to the second flow direction.

3. The battery assembly according to claim 2, wherein, The number of the branch flow paths along the first flow direction is i1, and the number of the branch flow paths along the second flow direction is i2, satisfying: 0.3 ≤ i1 / i2 ≤ 1.

4. The battery assembly according to claim 2 or 3, wherein, The plurality of branch flow paths include: A first branch flow path (31) and a second branch flow path (32), the first branch flow path (31) and the second branch flow path (32) being respectively arranged on both sides of the heat exchange area in the first direction; A third branch flow path (33), the third branch flow path (33) being configured with a plurality of mutually connected ones, and the plurality of branch flow paths being arranged between the first branch flow path (31) and the second branch flow path (32); wherein The first branch flow path (31) and the second branch flow path (32) are connected through the plurality of third branch flow paths (33); wherein In at least one heat exchange area, the first branch flow path (31) is connected to the incoming water flow path, the second branch flow path (32) is connected to the outgoing water flow path, and / or In at least one heat exchange area, the first branch flow path (31) and the second branch flow path (32) are respectively connected to the incoming water flow path, and at least one of the third branch flow paths (33) is connected to the outgoing water flow path.

5. The battery assembly according to claim 4, wherein, The plurality of heat exchange areas include: A first heat exchange area, a second heat exchange area, a third heat exchange area, and a fourth heat exchange area. The first heat exchange area and the second heat exchange area are spaced apart in the second direction. The first heat exchange area and the third heat exchange area are spaced apart in the first direction. The fourth heat exchange area and the third heat exchange area are spaced apart in the second direction and the fourth heat exchange area and the second heat exchange area are spaced apart in the first direction. The water inlet (10) is arranged in the first heat exchange area, and the water outlet (20) is arranged in the third heat exchange area.

6. The battery assembly according to claim 5, wherein, The incoming water flow path includes: The first water inlet flow path (41), one end of the first water inlet flow path (41) is communicated with the water inlet (10), at least part of the first water inlet flow path (41) is arranged on the outer periphery of the first heat exchange area, and the other end of the first water inlet flow path (41) is communicated with the first branch flow path (31) and the second branch flow path (32) of the second heat exchange area; The second water inlet flow path (42), one end of the second water inlet flow path (42) is communicated with the water inlet (10), and the other end of the second water inlet flow path (42) is communicated with the first branch flow path (31) and the second branch flow path (32) of the first heat exchange area; The third water inlet flow path (43), one end of the third water inlet flow path (43) is communicated with the water inlet (10), the other end of the third water inlet flow path (43) is communicated with the first branch flow path (31) of the third heat exchange area, and / or the other end of the third water inlet flow path (43) is communicated with the first branch flow path (31) of the fourth heat exchange area and at least one of the third branch flow paths (33).

7. The battery assembly according to claim 6, wherein, The water outlet flow path includes: The first water outlet flow path (51), one end of the first water outlet flow path (51) is communicated with at least one of the third branch flow paths (33) of the second heat exchange area, and the other end of the first water outlet flow path (51) sequentially flows through the outer periphery of the fourth heat exchange area and the third heat exchange area and is communicated with the water outlet pipe (20); The second water outlet flow path (52), one end of the second water outlet flow path (52) is communicated with at least one of the third branch flow paths (33) of the first heat exchange area, and the other end of the second water outlet flow path (52) sequentially flows through the outer periphery of the second heat exchange area and the fourth heat exchange area and is communicated with the first water outlet flow path (51); The third water outlet flow path (53), one end of the third water outlet flow path (53) is communicated with the second branch flow path (32) of the third heat exchange area, and the other end of the third water outlet flow path (53) flows through the outer periphery of the third heat exchange area and is communicated with the water outlet (20); The fourth water outlet flow path (54), one end of the fourth water outlet flow path (54) is communicated with the second branch flow path (32) of the fourth heat exchange area and at least one of the third branch flow paths (33), and the other end of the fourth water outlet flow path (54) sequentially flows through the outer periphery of the fourth heat exchange area and the outer periphery of the third heat exchange area and is communicated with the water outlet (20).

8. The battery assembly according to claim 7, wherein, The water inlet (10) is arranged on one side of the first heat exchange area in the second direction, and the water outlet (20) is arranged on one side of the third heat exchange area in the second direction.

9. The battery assembly according to claim 8, wherein At least part of the third water inlet flow path (43) and the third water outlet flow path (53) are arranged between the first heat exchange area and the third heat exchange area.

10. The battery assembly according to claim 9, wherein, The ratio of the number of the branch flow paths in the first heat exchange area to the number of the branch flow paths in the third heat exchange area is P, satisfying: 1.2 ≤ P ≤ 1.

6.

11. The battery assembly according to claim 9 or 10, wherein, The flow resistance of the branch flow path in the first heat exchange area is R1, the flow resistance of the branch flow path in the second heat exchange area is R2, the flow resistance of the branch flow path in the third heat exchange area is R3, and the flow resistance of the branch flow path in the fourth heat exchange area is R4, satisfying: R1 > R3 > R2 > R4.

12. The battery assembly according to claim 11, wherein, The cross-sectional area of the branch flow path in the first heat exchange area is S1, the cross-sectional area of the branch flow path in the second heat exchange area is S2, the cross-sectional area of the branch flow path in the third heat exchange area is S3, and the cross-sectional area of the branch flow path in the fourth heat exchange area is S4, satisfying: S4 > S2 > S3 > S1.

13. A vehicle, wherein, Including the battery assembly according to any one of claims 1-12.

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