Battery assembly and vehicle having the same

Abstract

The application discloses a battery assembly and a vehicle with the same, the battery assembly comprising: a battery pack, the battery pack being configured as a plurality of battery packs arranged in a first direction in sequence and each battery pack being provided with a plurality of battery monomers arranged in a second direction in sequence; a heat exchange plate provided with a water inlet and a water outlet, a water inlet flow path communicated with the water inlet, and a water outlet flow path communicated with the water outlet, the heat exchange plate being provided with heat exchange areas corresponding to the plurality of battery packs, each heat exchange area being provided with a plurality of branch flow paths corresponding to each battery pack, an upstream end of each branch flow path being communicated with the water inlet flow path, and a downstream end of each branch flow path being communicated with the water outlet flow path. According to the battery assembly designed by the application, the heat exchange effect of the battery pack is improved by arranging a plurality of heat exchange areas on the heat exchange plate, each heat exchange area corresponding to the plurality of battery packs, and one battery pack corresponding to a plurality of heat exchange flow paths, the temperature of the battery pack during operation is more stable, and the working stability of the battery assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery assemblies, in particular to a battery assembly and a vehicle with the same. BACKGROUND

[0002] In the related art, a battery assembly includes a heat exchange plate and a plurality of battery monomers, the heat exchange plate is adapted to be in contact with the plurality of battery monomers to cool or heat the plurality of battery monomers, in the prior art, a plurality of cooling zones are provided in the heat exchange plate, each cooling zone is provided with a cooling channel and the plurality of cooling channels are independent of each other, avoiding the situation that the cooling liquid is heated in the flow direction when the battery system is charging and discharging, ensuring the consistency of the temperature of the entire battery pack, but in the above setting mode, the heat exchange efficiency of the heat exchange plate to the battery pack is poor, thereby reducing the working stability of the battery assembly. SUMMARY

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery assembly. According to the battery assembly designed by the present application, a plurality of heat exchange zones are provided on the heat exchange plate, and each heat exchange zone corresponds to a plurality of battery groups, and each battery group corresponds to a plurality of heat exchange channels, thereby improving the heat exchange effect of the battery group, making the temperature of the battery group more stable during operation, and improving the working stability of the battery assembly.

[0004] The present application also provides a vehicle with the above battery assembly.

[0005] The battery assembly according to the present application comprises: a battery group, which is configured to be arranged in sequence in a first direction and each battery group is provided with a plurality of battery monomers arranged in sequence in a second direction; a heat exchange plate provided with a water inlet and a water outlet, a water inlet flow path communicated with the water inlet, and a water outlet flow path communicated with the water outlet, the heat exchange plate is provided with a heat exchange zone corresponding to a plurality of battery groups, the heat exchange zone is provided with a plurality of branch flow paths corresponding to each battery group, the upstream end of the branch flow path is communicated with the water inlet flow path, and the downstream end of the branch flow path is communicated with the water outlet flow path.

[0006] The battery assembly according to the present application is provided with a plurality of heat exchange zones in the heat exchange plate, one heat exchange zone is provided corresponding to a plurality of battery groups, and one battery group is provided with a plurality of branch flow paths, the plurality of branch flow paths are adapted to heat or cool the battery group, thereby improving the heat exchange effect of the battery group, making the temperature of the battery group more stable during operation, and improving the working stability of the battery assembly.

[0007] According to some embodiments of the present application, in one of the heat exchange zones, a plurality of branch flow paths respectively extend in a second direction and are spaced apart in a first direction, cooling liquid in at least one of the branch flow paths flows in a first flow direction, and cooling liquid in at least another of the branch flow paths flows in a second flow direction, the first flow direction being opposite to the second flow direction.

[0008] According to some embodiments of the present application, the number of branch flow paths in the first flow direction is i1, and the number of branch flow paths in the second flow direction is i2, satisfying: 0.3≤i1 / i2≤1.

[0009] According to some embodiments of the present application, the plurality of branch flow paths comprises: a first branch flow path and a second branch flow path, the first branch flow path and the second branch flow path being respectively arranged on two sides of the heat exchange zone in the first direction; and a third branch flow path, the third branch flow path being configured to communicate a plurality of branch flow paths with each other, and the plurality of branch flow paths being arranged between the first branch flow path and the second branch flow path; wherein the first branch flow path and the second branch flow path are communicated through the plurality of third branch flow paths; wherein in at least one of the heat exchange zones, the first branch flow path is communicated with the inlet water flow path, the second branch flow path is communicated with the outlet water flow path, and / or the first branch flow path and the second branch flow path of at least one of the heat exchange zones are respectively communicated with the inlet water flow path, and at least one of the third branch flow paths is communicated with the outlet water flow path.

[0010] According to some embodiments of the present application, the plurality of heat exchange zones comprises: a first heat exchange zone, a second heat exchange zone, a third heat exchange zone, and a fourth heat exchange zone, the first heat exchange zone and the second heat exchange zone being spaced apart in a second direction, the first heat exchange zone and the third heat exchange zone being spaced apart in a first direction, the fourth heat exchange zone and the third heat exchange zone being spaced apart in the second direction, and the fourth heat exchange zone and the second heat exchange zone being spaced apart in the first direction, the inlet water port being arranged in the first heat exchange zone, and the outlet water port being arranged in the third heat exchange zone.

[0011] According to some embodiments of the present application, the water inlet flow path comprises: a first water inlet flow path, one end of the first water inlet flow path being in communication with the water inlet, at least a portion of the first water inlet flow path being disposed at the outer periphery of the first heat exchange region, the other end of the first water inlet flow path being in communication with the first branch flow path and the second branch flow path of the second heat exchange region; a second water inlet flow path, one end of the second water inlet flow path being in communication with the water inlet, the other end of the second water inlet flow path being in communication with the first branch flow path and the second branch flow path of the first heat exchange region; a third water inlet flow path, one end of the third water inlet flow path being in communication with the water inlet, the other end of the third water inlet flow path being in communication with the second branch flow path of the third heat exchange region, and / or the other end of the third water inlet flow path being in communication with the second branch flow path of the fourth heat exchange region and at least one third branch flow path.

[0012] According to some embodiments of the present application, the water outlet flow path comprises: a first water outlet flow path, one end of the first water outlet flow path being in communication with at least one third branch flow path of the second heat exchange region, the other end of the first water outlet flow path sequentially flowing through the outer periphery of the fourth heat exchange region and the third heat exchange region and being in communication with the water outlet; a second water outlet flow path, one end of the second water outlet flow path being in communication with at least one third branch flow path of the first heat exchange region, the other end of the second water outlet flow path sequentially flowing through the outer periphery of the second heat exchange region and the fourth heat exchange region and being in communication with the first water outlet flow path; a third water outlet flow path, one end of the third water outlet flow path being in communication with the first branch flow path of the third heat exchange region, the other end of the third water outlet flow path flowing through the outer periphery of the third heat exchange region and being in communication with the water outlet; a fourth water outlet flow path, one end of the fourth water outlet flow path being in communication with the first branch flow path and at least one third branch flow path of the fourth heat exchange region, the other end of the fourth water outlet flow path sequentially flowing through the outer periphery of the fourth heat exchange region and the outer periphery of the third heat exchange region and being in communication with the water outlet.

[0013] According to some embodiments of the present application, the water inlet is disposed at one side of the first heat exchange region in the second direction, and the water outlet is disposed at one side of the third heat exchange region in the second direction.

[0014] According to some embodiments of the present application, at least a portion of the third water inlet flow path and the third water outlet flow path is disposed between the first heat exchange region and the third heat exchange region.

[0015] According to some embodiments of the present application, the ratio of the number of branch flow paths in the first heat exchange region to the number of branch flow paths in the third heat exchange region is P, and 1.2≤P≤1.6 is satisfied.

[0016] According to some embodiments of the present application, 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.

[0017] According to some embodiments of the present application, 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.

[0018] A vehicle according to another aspect of embodiments of the present application is briefly described below.

[0019] The vehicle according to the present application comprises the battery assembly according to any one of the above embodiments, and since the vehicle according to the present application is provided with the battery assembly according to the above embodiments, the battery of the vehicle has good working stability, and the vehicle has good power performance.

[0020] Additional aspects and advantages of the present application will be described in the description that follows, and will become apparent from the description, or can be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a schematic view of a water outlet flow path, a water inlet flow path, and a branch flow path, and a battery assembly according to embodiments of the present application;

[0023] Figure 2 is a front view of a heat exchange plate according to embodiments of the present application;

[0024] Figure 3 is a schematic view of a first heat exchange zone according to embodiments of the present application;

[0025] Figure 4 is a schematic view of a second heat exchange zone according to embodiments of the present application;

[0026] Figure 5 is a schematic view of a third heat exchange zone according to embodiments of the present application;

[0027] Figure 6 is a schematic view of a fourth heat exchange zone according to embodiments of the present application;

[0028] Figure 7is a schematic view of a battery pack and a heat exchange plate according to an embodiment of the present application.

[0029] Reference numerals: 1, heat exchange plate; 2, battery pack;

[0030] 10, water inlet; 20, water outlet;

[0031] 31, first branch flow path; 32, second branch flow path; 33, third branch flow path;

[0032] 41, first water inlet flow path; 42, second water inlet flow path; 43, third water inlet flow path;

[0033] 51, first water outlet flow path; 52, second water outlet flow path; 53, third water outlet flow path; 54, fourth water outlet flow path

[0034] 60, battery cell. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example embodiments in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below by reference to the drawings are exemplary and are intended only for the purpose of explaining the present application, and are not to be understood as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0038] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connect", "fix", and other terms should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] In the related art, the battery assembly includes a heat exchange plate and a plurality of battery monomers, the heat exchange plate is adapted to be in contact with the plurality of battery monomers to cool or heat the plurality of battery monomers, in the prior art, a plurality of cooling zones are provided in the heat exchange plate, each cooling zone is provided with a cooling channel and the plurality of cooling channels are independent of each other, avoiding the situation that the cooling liquid is heated in the flow direction when the battery system is charging and discharging, ensuring the consistency of the temperature of the entire battery pack, but in the above setting mode, the heat exchange efficiency of the heat exchange plate to the battery pack is poor, thereby causing the working stability of the battery assembly to be low.

[0041] Reference will now be made to Figures 1-7 The battery assembly according to the embodiment of the present application is described.

[0042] As Figures 1-7 shown, the battery assembly according to the present application comprises: a battery pack 2 and a heat exchange plate 1, the battery pack 2 is configured to be arranged in a first direction, and each battery pack 2 is provided with a plurality of battery monomers 60 arranged 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 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 a heat exchange zone corresponding to the plurality of battery packs 2, and the heat exchange zone is provided with a plurality of branch flow paths corresponding to each battery pack 2, the upstream end of the branch flow path is in communication with the water inlet flow path, and the downstream end of the branch flow path is in communication with the water outlet flow path.

[0043] 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, the third direction can be configured as the height direction of the battery assembly, the plurality of battery monomers 60 are arranged in sequence in the second direction to be configured as the battery pack 2, the battery assembly comprises a plurality of battery packs 2, the plurality of battery packs 2 are arranged in sequence in the second direction, the battery assembly further comprises a heat exchange plate 1, the heat exchange plate 1 is arranged on one side of the plurality of battery packs 2 in the third direction, and the plurality of battery monomers 60 are respectively in contact with the heat exchange plate 1 so that the heat exchange plate 1 can heat or cool the plurality of battery monomers 60, a plurality of heat exchange zones are formed in the heat exchange plate 1, one heat exchange zone corresponds to the plurality of battery packs 2, a plurality of branch flow paths are formed in each heat exchange zone, one battery pack 2 corresponds to a plurality of branch flow paths, and 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 further provided with a water inlet 10 and a water outlet 20, one end of the water inlet flow path is communicated with the water inlet 10 and the other end is communicated with the upstream end of the branch flow path, and one end of the water outlet flow path is communicated with the water outlet 20 and the other end is communicated with the downstream end of the branch flow path.

[0044] It can be understood that the cooling liquid flows out of the water outlet 20 after sequentially passing through the water inlet 10, the water inlet flow path, the branch flow path and the water outlet flow path, and the cooling liquid exchanges heat with the plurality of battery monomers 60 during the flow process. One heat exchange zone corresponds to a plurality of battery packs 2, and one battery pack 2 corresponds to a plurality of branch flow paths. The cooling liquid flowing in the plurality of 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, through the above arrangement, the temperature of the battery pack 2 during work can be more stable, and the working efficiency of the battery pack 2 can be more stable, thereby improving the working stability of the battery assembly.

[0045] According to the battery assembly, a plurality of heat exchange zones are arranged in the heat exchange plate 1, one heat exchange zone corresponds to a plurality of battery packs 2, and one battery pack 2 corresponds to a plurality of branch flow paths. The plurality of branch flow paths are suitable for heating or cooling the battery pack 2, thereby improving the heat exchange effect of the battery pack 2, and making the temperature of the battery pack 2 during work more stable, thereby improving the working stability of the battery assembly.

[0046] According to some embodiments of the present application, as shown in Figures 1-5 In one heat exchange zone, a plurality of branch flow paths respectively extend along the second direction and are distributed in the first direction, the cooling liquid in at least one branch flow path flows along the first flow direction, and the cooling liquid in at least another branch flow path flows along the second flow direction. The first flow direction is opposite to the second flow direction.

[0047] In some embodiments, the branch flow paths extend in the second direction, and the plurality of branch flow paths are spaced apart in the first direction. It can be understood that the cooling liquid 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, and then is discharged from the water outlet 20. The cooling liquid exchanges heat with the battery pack 2 during the flow process. Thus, as the cooling liquid flows, the heat loss of the cooling liquid gradually increases. The increase in the heat loss of the cooling liquid reduces the heat exchange effect on the battery cells 60. By allowing the cooling liquid to flow in the first flow direction in part of the branch flow paths and to flow in the second flow direction in part of the branch flow paths, and by allowing the first flow direction to be opposite to the second flow direction, the phenomenon that part of the battery cells 60 have a good heat exchange effect and part of the battery cells 60 have a poor heat exchange effect in the heat exchange area can be avoided. This makes the heat exchange of the heat exchange plate 1 on the plurality of battery cells 60 in the heat exchange area more balanced.

[0048] In some embodiments, in one heat exchange area, the flow directions of at least part of the adjacent branch flow paths are opposite and communicate with each other. Thus, by the above arrangement, the cooling liquid can continuously flow in the heat exchange area. This avoids the cooling liquid from directly entering the water outlet flow path after passing through one branch flow path, prolongs the residence time of the cooling liquid in the heat exchange area, and improves the utilization rate of the cooling liquid.

[0049] According to some embodiments of the present application, as shown in Figures 1-6 The number of branch flow paths in the first flow direction is i1, and the number of branch flow paths in the second flow direction is i2. It is satisfied that 0.3≤i1 / i2≤1.

[0050] 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, for example, in four branch flow paths arranged in sequence in a first direction, the branch flow paths on both sides of the first direction are respectively configured as a first flow channel and a second flow channel, the two branch flow paths between the first flow channel and the second flow channel are respectively configured as a third flow channel, the flow direction of the cooling liquid in the two third flow channels is a first flow direction, the flow direction of the cooling liquid in the first flow channel and the second flow channel is a second flow direction, the same side of the two third flow channels is communicated with the first flow channel, and the same side of the other end of the two third flow channels is communicated with the second flow channel, which satisfies 0.3≤i1 / i2≤1, which is not limited here, thereby, through the above setting, the plurality of branch flow paths can be connected in series and / or parallel to each other, the time of the cooling liquid staying in the heat exchange zone is prolonged, and the heat exchange effect of the cooling liquid on the battery pack 2 is improved. At the same time, it can be understood that the cooling liquid flows in the first flow direction or the second flow direction will cause the heat exchange effect of the cooling liquid to gradually decrease in the flow direction of the cooling liquid, thereby appearing in a battery pack 2, some battery monomers 60 have good heat exchange effect and some battery monomers 60 have poor heat exchange effect. Therefore, by making the cooling liquid flow in the plurality of branch flow paths in the first flow direction and the second flow direction respectively, the heat exchange of the plurality of battery monomers 60 of the battery pack 2 can be more balanced, thereby improving the heat exchange effect of the battery pack 2, making the temperature of the battery pack 2 more stable when working, thereby making the working efficiency of the battery pack 2 more stable, and further improving the working stability of the battery assembly.

[0051] According to some embodiments of the present application, as shown in Figures 1-6 The plurality of 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, the third branch flow path 33 is configured to be communicated with each other, and the plurality of 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 communicated through a plurality of third branch flow paths 33, wherein in at least one heat exchange zone, the first branch flow path 31 is communicated with the water inlet flow path, the second branch flow path 32 is communicated with 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 communicated with the water inlet flow path, and at least one third branch flow path 33 is communicated with the water outlet flow path.

[0052] In some embodiments, in the plurality of 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 in communication with the inlet water flow path, the other end of the first branch flow path 31 and the other end of the second branch flow path 32 are in communication with at least one third branch flow path 33, respectively, in the plurality of third branch flow paths 33, the third branch flow path 33 in communication with the first branch flow path 31 and the third branch flow path 33 in communication with the second branch flow path 32 are in communication with the outlet water flow path, respectively, of course, one end of one of the plurality of third branch flow paths 33 can be in communication with the first branch flow path 31 and the second branch flow path 32, respectively, and the other end of the third branch flow path 33 is in communication with the outlet water flow path, which is not limited here.

[0053] It can be understood that, in a heat exchange zone, the part of the battery pack 2 close to the outer periphery of the heat exchange zone is configured as an edge part, since the edge part has a larger contact area with the external environment, therefore, when the heat exchange plate 1 heats the plurality of battery packs 2, the heat loss of the edge part is larger, resulting in lower heating efficiency of the heat exchange plate 1 on the battery pack 2. When the heat exchange plate 1 is suitable for heating the battery pack 2, the cooling liquid starts to heat the plurality of battery components 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 part, respectively, and since the heat loss of the cooling liquid flowing in the first branch flow path 31 and the second branch flow path 32 is smaller, therefore, the heating effect of the first branch flow path 31 and the second branch flow path 32 on the edge part is better. Therefore, through the above setting, the heating effect on the edge part can be improved to eliminate the heat loss of the edge part, so that the cooling liquid heats the battery pack 2 corresponding to the heat exchange zone more evenly, improves the heating effect of the battery pack 2 corresponding to the heat exchange zone, and improves the cold start capability of the battery component.

[0054] In some embodiments, in the plurality of heat exchange zones, the first branch flow path 31 in at least one heat exchange zone is in communication with the inlet water flow path and the second branch flow path 32 is in communication with the outlet water flow path, therefore, after the cooling liquid enters the heat exchange zone from the inlet water flow path, the cooling liquid enters the outlet water flow path after sequentially passing through the first branch flow path 31, the third branch flow path 33 and the second branch flow path 32, the cooling liquid flow path is simple, the setting mode 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 is simplified, the production efficiency of the heat exchange plate 1 is improved, at the same time, the time of the cooling liquid staying in the heat exchange zone is prolonged, and the utilization rate of the cooling liquid is improved.

[0055] It is worth mentioning that the first branch flow paths 31 can be constructed as multiple ones in parallel with each other. For 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 in parallel with each other. For 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.

[0056] According to some embodiments of the present invention, as Figures 1-6 shown, the multiple heat exchange zones include: a first heat exchange zone, a second heat exchange zone, a third heat exchange zone, and a fourth heat exchange zone. The first heat exchange zone and the second heat exchange zone are spaced apart in the second direction. The first heat exchange zone and the third heat exchange zone are spaced apart in the first direction. The fourth heat exchange zone and the third heat exchange zone are spaced apart in the second direction and the fourth heat exchange zone and the second heat exchange zone are spaced apart in the first direction. The water inlet 10 is provided in the first heat exchange zone, and the water outlet 20 is provided in the third heat exchange zone.

[0057] It can be understood that the first heat exchange zone, the second heat exchange zone, the third heat exchange zone, and the fourth heat exchange zone are arranged in a "field" shape on the heat exchange plate 1. The multiple heat exchange zones are compact and regular in layout, improving the utilization rate of the heat exchange plate 1. At the same time, the manufacturing process of the heat exchange plate 1 is simplified, and the production efficiency of the heat exchange plate 1 is improved.

[0058] In some embodiments, the water inlet 10 is provided in the first heat exchange zone and the water outlet 20 is provided in the third heat exchange zone. Thus, it can be that the coolant enters the water inlet flow path from the water inlet 10, exchanges heat with the first heat exchange zone, and then returns to the third heat exchange zone through the water outlet flow path, and finally is discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange zone and the third heat exchange zone. It can be that the coolant enters the second heat exchange zone through the water inlet flow path, and after the coolant exchanges heat with the second heat exchange zone, it returns to the third heat exchange zone through the water outlet flow path, and finally is discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange zone, the second heat exchange zone, and the third heat exchange zone. It can also be that the coolant enters the third heat exchange zone through the water inlet flow path, and after the coolant exchanges heat with the third heat exchange zone, it 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 zone and the third heat exchange zone. It can also be that the coolant enters the fourth heat exchange zone through the water inlet flow path, and after the coolant exchanges heat with the fourth heat exchange zone, it returns to the third heat exchange zone through the water outlet flow path, and finally is discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange zone, the fourth heat exchange zone, and the third heat exchange zone. Thus, through the above settings, the residence time of the coolant in the heat exchange zone can be extended, and the utilization rate of the coolant is improved.

[0059] According to some embodiments of the present application, as shown in Figures 1-6 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 in communication with the water inlet 10, and at least a portion of the first water inlet flow path 41 is arranged at the outer periphery of the first heat exchange area. The other end of the first water inlet flow path 41 is in communication with the first branch flow path 31 and the second branch flow path 32 of the second heat exchange area. Thus, the cooling liquid flows into the second heat exchange area after flowing through the outer periphery of the first heat exchange area, and in the first direction, the cooling liquid exchanges heat with the second heat exchange area from both sides of the second heat exchange area. It can be understood that as the cooling liquid flows, the heat loss of the cooling liquid gradually increases. Thus, the heat loss of the cooling liquid when flowing in the first branch flow path 31 and the second branch flow path 32 of the second heat exchange area is small. At this time, the heating effect of the cooling liquid on the edge portion is good. Thus, by the above arrangement, the heating effect of the edge portion of the battery pack 2 corresponding to the second heat exchange area can be improved, and the cold start capability of the battery assembly is improved.

[0060] One end of the second water inlet flow path 42 is in communication with the water inlet 10, and the other end of the second water inlet flow path 42 is in communication with the first branch flow path 31 and the second branch flow path 32 of the first heat exchange area. Thus, in the first direction, the cooling liquid exchanges heat with the first heat exchange area from both sides of the first heat exchange area. The heating effect of the edge portion of the battery pack 2 corresponding to the first heat exchange area is improved, and the cold start capability of the battery assembly is improved.

[0061] One end of the third water inlet flow path 43 is in communication with the water inlet 10, and the other end of the third water inlet flow path 43 is in communication with the first branch flow path 31 of the third heat exchange zone. Thus, after the cooling liquid enters the third heat exchange zone from the third water inlet flow path 43, the cooling liquid is sequentially discharged after passing through the first branch flow path 31, the third branch flow path 33, and the second branch flow path 32. The cooling liquid flow path is simple, the setting mode 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 is simplified, the residence time of the cooling liquid in the third heat exchange zone is prolonged, and the utilization rate of the cooling liquid is improved. In addition, the other end of the third water inlet flow path 43 is in communication with 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 direction, the cooling liquid enters the fourth heat exchange zone in two parts. One part of the cooling liquid exchanges heat with the fourth heat exchange zone from one side of the fourth heat exchange zone and is discharged when flowing to the middle of the fourth heat exchange zone. The other part of the cooling liquid exchanges heat with the fourth heat exchange zone from the middle of the fourth heat exchange zone and is discharged when flowing to the other side of the fourth heat exchange zone. In addition, 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 the heat loss of the cooling liquid increases as the cooling liquid flows. Thus, through the above arrangement, the branch flow path with large heat loss and the branch flow path with small heat loss can be arranged adjacent to each other in the fourth heat exchange zone, so that the temperature in the fourth heat exchange zone is more balanced, and the heat exchange of the battery pack 2 corresponding to the fourth heat exchange zone is more balanced.

[0062] In some embodiments, one end of the third water inlet flow path 43 is in communication with the water inlet 10, and the other end of the third water inlet flow path 43 is in communication with 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 in communication with the water inlet 10, and the other end of the third water inlet flow path 43 is in communication with the first branch flow path 31 and at least one third branch flow path 33 of the fourth heat exchange zone. In other embodiments, one end of the third water inlet flow path 43 is in communication with the water inlet 10, and the other end of the third water inlet flow path 43 is in communication with the first branch flow path 31 of the third heat exchange zone. In addition, the other end of the third water inlet flow path 43 is also in communication with the first branch flow path 31 and at least one third branch flow path 33 of the fourth heat exchange zone. Here, no limitation is made.

[0063] According to some embodiments of the present application, as Figures 1-6As shown, 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 communicates with at least one third branch flow path 33 of the second heat exchange area, 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 communicates with the water outlet 20, thereby the cooling liquid enters the first water outlet flow path 51 after flowing through the second heat exchange area, and the cooling liquid can exchange heat with the edge part of the fourth heat exchange area and the third heat exchange area when flowing in the first water outlet flow path 51, thereby improving the utilization rate of the cooling liquid, and at the same time, it can be understood that the first water outlet flow path 51 collects the cooling liquid in the plurality of branch flow paths in the second heat exchange area, thereby the flow rate of the cooling liquid in the first water outlet flow path 51 is greater than the flow rate of the cooling liquid in the branch flow path of the second heat exchange area, and the flow rate of the cooling liquid in the first water outlet flow path 51 is greater when the cooling liquid flows in the first water outlet flow path 51 and exchanges heat with the edge part of the fourth heat exchange area and the third heat exchange area, thereby improving the heating effect of the edge part of the fourth heat exchange area and the third heat exchange area, making the heating of the plurality of battery groups 2 by the heat exchange plate 1 more balanced, and improving the cold start capability of the battery assembly.

[0064] One end of the second water outlet flow path 52 communicates with at least one third branch flow path 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 communicates with the first water outlet flow path 51, thereby the cooling liquid enters the second water outlet flow path 52 after flowing through the first heat exchange area, and the cooling liquid can exchange heat with the edge part of the second heat exchange area and the fourth heat exchange area when flowing in the second water outlet flow path 52, thereby improving the utilization rate of the cooling liquid, and at the same time, the second water outlet flow path 52 communicates with the first water outlet flow path 51 in the fourth heat exchange area, the cooling liquid flowing in the second water outlet flow path 52 enters the first water outlet flow path 51 in the fourth heat exchange area and returns to the water outlet 20 through the first water outlet flow path 51, thereby avoiding extending the second water outlet flow path 52 to communicate 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, improving the production efficiency of the heat exchange plate 1, and at the same time, the second water outlet flow path 52 collects the cooling liquid in the plurality of branch flow paths in the first heat exchange area, thereby the flow rate of the cooling liquid in the second water outlet flow path 52 is greater than the flow rate of the cooling liquid in the branch flow path of the first heat exchange area, thereby improving the heating effect of the edge part of the battery group 2 corresponding to the second heat exchange area and the fourth heat exchange area.

[0065] 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 outer periphery of the third heat exchange zone and is connected to the outlet 20. Thus, when the coolant flows in the third water outlet flow path 53, it can exchange heat on the edge of the third heat exchange zone, thereby improving the utilization rate of the coolant. At the same time, the third water outlet flow path 53 collects the coolant from multiple branch flow paths in the third heat exchange zone. Thus, 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 on the edge of the battery pack 2 corresponding to the third heat exchange zone.

[0066] 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. The other end of the fourth water outlet flow path 54 flows sequentially through the outer periphery of the fourth heat exchange zone and the outer periphery of the third heat exchange zone and is connected to the water outlet 20. Thus, when the coolant flows in the fourth water outlet flow path 54, it can exchange heat on the edges 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 collects the coolant from multiple branch flow paths in the fourth heat exchange zone. Thus, 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 on the edges of the battery pack 2 corresponding to the fourth heat exchange zone and the third heat exchange zone, respectively.

[0067] According to some embodiments of the present invention, such as Figures 1-6 As shown, the inlet 10 is located on one side of the first heat exchange zone in the second direction, and the outlet 20 is located on one side of the third heat exchange zone in the second direction. It can be understood that in the second direction, the inlet 10 and outlet 20 are respectively located at the same end of the first and third heat exchange zones. In some embodiments, the inlet 10 of the heat exchange plate 1 is connected to the cooling device via a first pipe, and the outlet 20 of the heat exchange plate 1 is connected to the cooling device via a second pipe. Therefore, this arrangement simplifies the connection process between the heat exchange plate 1 and the cooling device. In some embodiments, in the first direction, the inlet 10 is located on the side of the first heat exchange zone closer to the third heat exchange zone, and the outlet 20 is located on the side of the third heat exchange zone closer to the first heat exchange zone. Therefore, when connecting the heat exchange plate 1 and the cooling device, the first pipe and the second pipe can be more conveniently connected to the inlet 10 and the outlet 20, respectively, further simplifying the connection process between the heat exchange plate 1 and the cooling device.

[0068] According to some embodiments of the present invention, such as Figures 1-6As shown, at least a portion of the third inlet water flow path 43 and the third outlet water flow path 53 are disposed between the first heat exchange zone and the third heat exchange zone. It is understood that at least a portion of the third inlet water flow path 43 can exchange heat at the edge of the first heat exchange zone, and at least a portion of the third outlet water flow path 53 can exchange heat at the edge of the third heat exchange zone. Furthermore, this arrangement allows at least a portion of the third inlet water flow path 43 and at least a portion of the third outlet water flow path 53 to be disposed adjacent to each other, thereby ensuring more even heat exchange at the edges of the battery pack 2 corresponding to the first and third heat exchange zones, respectively.

[0069] According to some embodiments of the present invention, such as Figures 1-6 As shown, 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, which satisfies: 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 outlet 20 in the third heat exchange zone. Therefore, through the above arrangement, the first outlet flow path 51, the third outlet flow path 53, the fourth outlet flow path 54, and the branch flow paths of the third heat exchange zone can be used to fully cover the third heat exchange zone, improving the utilization rate of the heat exchange plate 1 in the third heat exchange zone.

[0070] According to some embodiments of the present invention, such as Figures 1-6 As shown, 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.

[0071] In some embodiments, the flow rates of the coolant in the first, second, third, and fourth heat exchange zones are Q1, Q2, Q3, and Q4, respectively. The greater the flow resistance of the branch flow path, the faster the coolant flows in the branch flow path, meaning the shorter the residence time of the coolant in the branch flow path, resulting in a smaller flow rate in the branch flow path. As the coolant flows, the heat loss of the coolant gradually increases. It can be understood that the time for the coolant to enter the first heat exchange zone is t1, the time for the coolant to enter the second heat exchange zone is t2, the time for the coolant to enter the third heat exchange zone is t3, and the time for the coolant to enter the fourth heat exchange zone is t4. Compared to the third heat exchange zone, the inlet 10 of the second heat exchange zone... The distance between the third heat exchange zones is less than the distance between the inlet 10 and the second heat exchange zone. Therefore, t3 > t2. Compared with the fourth heat exchange zone, the distance between the inlet 10 and the second heat exchange zone is equal to the distance between the inlet 10 and the fourth heat exchange zone, i.e., t2 = t4. However, since the third and fourth heat exchange zones share the third 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. Thus, through the above settings, Q4 > Q2 > Q3 > Q1 can be made so that the coolant can more evenly exchange heat with the battery pack 2 corresponding to the first, second, third, and fourth heat exchange zones respectively.

[0072] According to some embodiments of the present invention, such as ​ As shown, 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 understandable that the flow resistance of the coolant in the branch flow path can be controlled by setting baffles or other means, or by controlling the cross-sectional area of ​​the branch flow path; no restrictions are imposed here. Therefore, by setting S4 > S2 > S3 > S1, we can achieve R1 > R3 > R2 > R4, and thus Q4 > Q2 > Q3 > Q1.

[0073] The vehicle according to the present invention is briefly described below.

[0074] The vehicle according to the present invention is equipped with the battery assembly of the above embodiments. Since the vehicle according to the present invention is equipped with the battery assembly described in any one of the above embodiments, the battery of the vehicle has good working stability, which makes the vehicle have good power performance.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0076] Although embodiments of the present invention have been shown and described above, variations, modifications, substitutions and alterations can be made to the above embodiments.

Claims

1. A battery assembly, comprising: Comprising: a plurality of battery packs (2) configured to be arranged in a first direction in sequence, and each of the battery packs (2) is provided with a plurality of battery cells (60) arranged in a second direction in sequence; a heat exchange plate (1) provided with a water inlet (10) and a water outlet (20), and a water inlet flow path connected with the water inlet (10) and a water outlet flow path connected with the water outlet (20), the heat exchange plate (1) is provided with a plurality of heat exchange areas corresponding to the plurality of battery packs (2), and each of the heat exchange areas is provided with a plurality of branch flow paths corresponding to each of the battery packs (2), the upstream end of the branch flow path is connected with the water inlet flow path, and the downstream end of the branch flow path is connected with the water outlet flow path; The plurality of branch flow paths comprises: 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) are arranged on both sides of the heat exchange area in the first direction respectively; a third branch flow path (33), the third branch flow path (33) is configured to be connected with each other, and a plurality of the third 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 a plurality of the third branch flow paths (33); wherein The first branch flow path (31) and the second branch flow path (32) of at least one heat exchange area are connected with the water inlet flow path respectively, and at least one third branch flow path (33) is connected with the water outlet flow path.

2. The battery assembly of claim 1, wherein, In at least one heat exchange area, the first branch flow path (31) is connected with the water inlet flow path, and the second branch flow path (32) is connected with the water outlet flow path.

3. The battery assembly of claim 1, wherein, In one of the heat exchange areas, a plurality of branch flow paths extend along the second direction and are distributed in the first direction, the cooling liquid in at least one of the branch flow paths flows in a first flow direction, and the cooling liquid in at least another of the branch flow paths flows in a second flow direction, the first flow direction being opposite to the second flow direction.

4. The battery assembly of claim 3, wherein, 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.

5. The battery assembly of claim 1, wherein, The plurality of heat exchange areas comprises: 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 distributed in the second direction, the first heat exchange area and the third heat exchange area are distributed in the first direction, the fourth heat exchange area and the third heat exchange area are distributed in the second direction, and the fourth heat exchange area and the second heat exchange area are distributed 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 of claim 5, wherein, The water inlet flow path comprises: A first water inlet flow path (41) has one end communicated with the water inlet (10) and at least a part of the first water inlet flow path (41) is arranged at the outer periphery of the first heat exchange zone, 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 zone; A second water inlet flow path (42) has one end 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 zone; A third water inlet flow path (43) has one end communicated with the water inlet (10) and 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 zone and / or the first branch flow path (31) and at least one third branch flow path (33) of the fourth heat exchange zone.

7. The battery assembly of claim 6, wherein, The water outlet flow path comprises: A first water outlet flow path (51) has one end communicated with 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) sequentially flows through the outer periphery of the fourth heat exchange zone and the third heat exchange zone and is communicated with the water outlet (20); A second water outlet flow path (52) has one end communicated with 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) sequentially flows through the outer periphery of the second heat exchange zone and the fourth heat exchange zone and is communicated with the first water outlet flow path (51); A third water outlet flow path (53) has one end communicated with 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 outer periphery of the third heat exchange zone and is communicated with the water outlet (20); A fourth water outlet flow path (54) has one end communicated with 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) sequentially flows through the outer periphery of the fourth heat exchange zone and the outer periphery of the third heat exchange zone and is communicated with the water outlet (20).

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

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

10. The battery assembly of claim 9, wherein, 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: 1.2≤P≤1.

6.

11. The battery assembly of claim 10, wherein, 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, and R1>R3>R2>R4 is satisfied.

12. The battery assembly of claim 11, wherein, 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, and S4>S2>S3>S1 is satisfied.

13. A vehicle characterized by comprising: A battery assembly comprising the battery assembly of any one of claims 1-12.

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