Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises a bottom plate, the bottom plate is provided with a heat exchange area, and the bottom plate is provided with a cooling flow channel in the heat exchange area; the frame is arranged on the periphery of the bottom plate in a surrounding mode, and a battery containing cavity is defined by the frame and the bottom plate; the partition beams are arranged on the bottom plate and located in the battery containing cavity, at least one partition beam extends in the first direction and is spaced in the second direction, and one partition beam or two adjacent partition beams are arranged in the heat exchange area or located on the edge of the heat exchange area; a mounting cavity is defined by two adjacent separation beams and the heat exchange area or one separation beam, the edge of the frame and the heat exchange area; the battery packs are accommodated in the mounting cavity and constructed into a plurality of battery packs which are sequentially arranged in the first direction; the bottom plate is suitable for heat exchange of the battery pack. The battery pack is free of a longitudinal beam structure, light in weight, large in capacity and capable of conducting heat exchange on the battery pack, it is guaranteed that the working environment temperature of the battery pack is stable, and the working efficiency of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery pack and a vehicle. Background Art

[0002] In the related art, a heat exchange plate is provided in the battery pack. The heat exchange plate is suitable for contacting with a plurality of battery cells and cooling or heating the battery cells. A plurality of cooling zones are provided in the heat exchange plate. A cooling channel is provided in each cooling zone and the plurality of cooling channels are independent of each other, thereby preventing the coolant from being heated in the flow direction when the battery pack is charged and discharged, thereby ensuring the temperature consistency of the entire battery pack. However, in the above-mentioned setting, the heat exchange efficiency of the heat exchange plate for the battery pack is poor, resulting in low operating stability of the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery pack. The battery pack of the present application has no longitudinal beam structure, is light in weight and has a large capacity, and can exchange heat for the battery pack to ensure that the working environment temperature of the battery pack is stable and improve the working efficiency of the battery pack.

[0004] The utility model also provides a vehicle with the battery pack.

[0005] According to the utility model, the battery pack includes: a bottom plate, the bottom plate is provided with a heat exchange area, and the bottom plate is provided with a cooling channel in the heat exchange area; a frame, the frame is arranged around the outer periphery of the bottom plate and defines a battery accommodating cavity with the bottom plate; a partition beam, the partition beam is arranged on the bottom plate and located in the battery accommodating cavity, the partition beam is constructed as at least one extending in a first direction and spaced in a second direction, one partition beam or two adjacent partition beams are arranged in the heat exchange area or located at the edge of the heat exchange area, two adjacent partition beams and the heat exchange area jointly define an installation cavity or one partition beam and the edge of the frame and the heat exchange area jointly define the installation cavity; a battery group, the battery group is accommodated in the installation cavity and is constructed as a plurality of groups arranged in sequence in the first direction; wherein each of the battery groups is provided with a plurality of battery cells, the plurality of battery cells extend in the second direction and are arranged in sequence along the first direction; and / or the plurality of battery cells extend in the first direction and are arranged in sequence along the second direction, and the bottom plate is suitable for heat exchange of the battery group.

[0006] According to the battery pack of the utility model, at least one partition beam is arranged in the heat exchange zone of the bottom plate, the end of the battery pack in the heat exchange zone is supported and fixed by the partition beam, and the bottom of the battery pack is stopped against the bottom plate to ensure the stable installation of the battery pack. There is no need to arrange a longitudinal beam structure between the battery packs, which saves the internal space of the battery pack to accommodate more battery packs and improve the energy density of the battery pack. A cooling channel is arranged in the heat exchange zone, and the coolant circulates in the cooling channel to realize heat exchange of the battery pack in the heat exchange zone, thereby ensuring the stability of the working environment temperature of the battery pack, improving the working efficiency of the battery pack, and ensuring the stable operation of the battery pack.

[0007] According to one embodiment of the utility model, the battery group is constructed as a plurality of battery groups arranged in sequence in a first direction, and each of the battery groups is provided with a plurality of battery cells arranged in sequence in a second direction; the bottom plate is provided with a water inlet and a water outlet, and the cooling flow channel includes a water inlet flow path connected to the water inlet and a water outlet flow path connected to the water outlet; the heat exchange zone is constructed as a plurality of battery groups, and each of the heat exchange zones corresponds to a plurality of the battery groups, and the bottom plate forms a plurality of branch flow paths corresponding to the battery groups in the heat exchange zone, 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.

[0008] According to one embodiment of the utility model, in one of the heat exchange zones, a plurality of the branch flow paths extend respectively along the first direction and are spaced apart in the second direction, the coolant in at least one of the branch flow paths flows along the first flow direction, and the coolant in at least another of the branch flow paths flows along the second flow direction, and the first flow direction is opposite to the second flow direction.

[0009] According to one embodiment of the utility model, 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 first direction, the first heat exchange zone and the third heat exchange zone are spaced apart in the second direction, the fourth heat exchange zone and the third heat exchange zone are spaced apart in the first direction, and the fourth heat exchange zone and the second heat exchange zone are spaced apart in the second direction, the water inlet is arranged in the first heat exchange zone, and the water outlet is arranged in the third heat exchange zone.

[0010] According to an embodiment of the utility model, the plurality of branch flow paths include: a first branch flow path and a second branch flow path, the first branch flow path and the second branch flow path are respectively arranged on both sides of the heat exchange zone in the first direction; a third branch flow path, the third branch flow path is constructed as a plurality of mutually connected, and the plurality of third branch flow paths are 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 connected through the plurality of third branch flow paths; wherein in at least one of the heat exchange zones, the first branch flow path is connected to the water inlet flow path, and the second branch flow path is connected to the water outlet flow path, and / or the first branch flow path and the second branch flow path of at least one heat exchange zone are respectively connected to the water inlet flow path, and at least one third branch flow path is connected to the water outlet flow path; The water inlet flow path includes: a first water inlet flow path, one end of which is connected to the water inlet, at least a portion of the first water inlet flow path is arranged on the periphery of the first heat exchange zone, and the other end of the first water inlet flow path is connected to the first branch flow path and the second branch flow path of the second heat exchange zone; a second water inlet flow path, one end of the second water inlet flow path is connected to the water inlet, and the other end of the second water inlet flow path is connected to the first branch flow path and the second branch flow path of the first heat exchange zone; a third water inlet flow path, one end of the third water inlet flow path is connected to the water inlet, and the other end of the third water inlet flow path is connected to the first branch flow path of the third heat exchange zone, and / or the other end of the third water inlet flow path is connected to the first branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths.

[0011] According to an embodiment of the utility model, the water outlet flow path includes: a first water outlet flow path, one end of the first water outlet flow path is connected to at least one of the third branch flow paths of the second heat exchange zone, and the other end of the first water outlet flow path flows through the outer peripheries of the fourth heat exchange zone and the third heat exchange zone in sequence and is connected to the water outlet connecting pipe; a second water outlet flow path, one end of the second water outlet flow path is connected to at least one of the third branch flow paths of the first heat exchange zone, and the other end of the second water outlet flow path flows through the outer peripheries of the second heat exchange zone and the fourth heat exchange zone in sequence and is connected to the first water outlet flow path; a third water outlet flow path, one end of the third water outlet flow path is connected to the second branch flow path of the third heat exchange zone, and the other end of the third water outlet flow path flows through the outer periphery of the third heat exchange zone and is connected to the water outlet; a fourth water outlet flow path, one end of the fourth water outlet flow path is connected to the second branch flow path and at least one of the third branch flow paths of the fourth heat exchange zone, and the other end of the fourth water outlet flow path flows through the outer 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.

[0012] According to one embodiment of the utility model, both ends of the partition beam extend to be connected to the frame, and the surfaces of the two adjacent partition beams facing each other are respectively formed with a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are arranged opposite to each other in the second direction; wherein the two ends of the plurality of battery groups are respectively stopped at the first limiting surface and the second limiting surface, and the two adjacent battery groups in the first direction are spaced apart.

[0013] According to one embodiment of the utility model, the battery pack includes: a first battery, the first battery is configured as a plurality of batteries arranged sequentially in a second direction; a second battery, the second battery is configured as a plurality of batteries arranged sequentially in the second direction, and any one of the first battery and the second battery is arranged correspondingly in the first direction.

[0014] According to one embodiment of the utility model, the battery pack also includes: an end plate, which is arranged at both ends of the battery pack, and the end plate is respectively formed with a supporting surface and a matching surface on both sides in the thickness direction, the supporting surface is suitable for being fitted with the end surface of the battery pack, and the matching surface is suitable for being fitted with the partition beam; wherein a guide surface is formed at the bottom of the end plate, and the guide surface is inclined toward the supporting surface in the direction toward the bottom.

[0015] According to one embodiment of the utility model, the battery pack further includes: a heating film, the heating film extends in the second direction, the heating film is respectively arranged to fit the first battery and the second battery on both sides in the thickness direction, and the two ends of the heating film are respectively fixed to the end plates located at the two ends of the battery pack.

[0016] According to one embodiment of the utility model, a first gap is formed between two adjacent first batteries, and a second gap is formed between two adjacent second batteries; an avoidance hole penetrating in the first direction is formed on the heating film assembly, one end of the avoidance hole is opposite to the first gap, and the other end of the avoidance hole is opposite to the second gap.

[0017] The vehicle according to the present utility model is briefly described below.

[0018] The vehicle according to the utility model includes the battery pack described in any one of the above embodiments. Since the vehicle according to the utility model includes the battery pack described in any one of the above embodiments, the battery pack in the vehicle according to the utility model has high heat exchange efficiency and stable operation.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is an assembly diagram of a bottom plate, a frame and a partition beam of a battery pack according to an embodiment of the utility model;

[0022] Figure 2 is a cooling channel distribution diagram of a battery pack according to an embodiment of the utility model;

[0023] Figure 3 is a cooling channel distribution diagram in a battery pack according to an embodiment of the utility model;

[0024] Figure 4 is a schematic diagram of a first heat exchange area of ​​a battery pack according to an embodiment of the utility model;

[0025] Figure 5 is a schematic diagram of a second heat exchange area of ​​a battery pack according to an embodiment of the utility model;

[0026] Figure 6 is a schematic diagram of a third heat exchange area of ​​a battery pack according to an embodiment of the utility model;

[0027] Figure 7 is a schematic diagram of a fourth heat exchange area of ​​a battery pack according to an embodiment of the utility model;

[0028] Figure 8 is a structural diagram of a heating film of a battery pack according to an embodiment of the utility model;

[0029] Fig. 9 is a structural diagram of an end plate of a battery pack according to an embodiment of the utility model;

[0030] Fig.10 It is a schematic diagram of a battery group in a battery pack according to an embodiment of the utility model.

[0031] Reference numerals:

[0032] Battery pack 1;

[0033] Bottom plate 11; frame 12; partition beam 13; battery pack 14, first battery 141, second battery 142;

[0034] End plate 15, matching surface 151, guide surface 152; heating film 16, avoidance hole 161;

[0035] Water inlet 10, water outlet 20;

[0036] A first branch 31, a second branch 32, and a third branch 33;

[0037] A first water inlet flow path 41, a second water inlet flow path 42, and a third water inlet flow path 43;

[0038] 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 . DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and 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 invention, and cannot be understood as limiting the present invention.

[0040] In the related art, a heat exchange plate is provided in the battery pack. The heat exchange plate is suitable for contacting with a plurality of battery cells and cooling or heating the battery cells. A plurality of cooling zones are provided in the heat exchange plate. A cooling channel is provided in each cooling zone and the plurality of cooling channels are independent of each other, thereby preventing the coolant from being heated in the flow direction when the battery pack is charged and discharged, thereby ensuring the temperature consistency of the entire battery pack. However, in the above-mentioned setting, the heat exchange efficiency of the heat exchange plate for the battery pack is poor, resulting in low operating stability of the battery pack.

[0041] Reference below Figure 1-Figure 10 A battery pack 1 according to an embodiment of the present invention is described.

[0042] According to the utility model, the battery pack 1 includes a bottom plate 11, a frame 12, a partition beam 13 and a battery group 14. The bottom plate 11 is provided with a heat exchange area, and the bottom plate 11 is provided with a cooling channel in the heat exchange area; the frame 12 is arranged around the outer periphery of the bottom plate 11 and defines a battery accommodating cavity with the bottom plate 11; the partition beam 13 is arranged on the bottom plate 11 and is located in the battery accommodating cavity, and the partition beam 13 is constructed as at least one extending in a first direction and spaced in a second direction, one partition beam or two adjacent partition beams 13 are arranged in the heat exchange area or at the edge of the heat exchange area, and the two partition beams 13 and the heat exchange area jointly define an installation cavity or one partition beam 13 and the edge of the frame 12 and the heat exchange area jointly define an installation cavity; the battery group 14 is accommodated in the installation cavity and is constructed as a plurality of groups arranged in sequence in the first direction; each battery group 14 is provided with a plurality of battery cells, and the plurality of battery cells extend in the second direction and are arranged in sequence along the first direction; and / or the plurality of battery cells extend in the first direction and are arranged in sequence along the second direction, and the bottom plate 11 is suitable for heat exchange of the battery group 14.

[0043] Specifically, the frame 12 is arranged around the bottom plate 11 and defines a battery accommodating cavity, and the battery pack 14 is arranged in the battery accommodating cavity, wherein at least one partition beam 13 is arranged in the battery accommodating cavity, and two adjacent partition beams 13 and the heat exchange area jointly define an installation cavity, or one partition beam 13 and the edge of the frame 12 and the heat exchange area jointly define the installation cavity, and the end of the battery pack 14 in the installation cavity stops against the edge of the partition beam 13 or the frame 12, and one side of the battery pack 14 at the edge of the installation cavity stops against the edge of the frame 12, and the bottom of the battery pack 14 is fitted with the bottom plate 11 to fix the battery pack 14, and there is no longitudinal beam structure between the battery packs 14, so as to save space of the battery pack 1, so as to install more battery packs 14 in the battery pack 1 and improve the capacity of the battery pack 1, wherein The battery pack 14 is constructed as a plurality of groups arranged in sequence in a first direction, each battery pack 14 includes a plurality of battery cells, each battery cell can extend in a second direction and the plurality of battery cells are arranged in sequence in the first direction; each battery cell can also extend in the first direction and the plurality of battery cells are arranged in sequence in the second direction; a plurality of battery packs 14 can be arranged in a heat exchange zone in a battery pack 14, a cooling channel is arranged in the heat exchange zone, the coolant exchanges heat in the cooling channel with the heat exchange zone, the battery pack 14 abuts against the bottom plate 11 to heat or cool the battery pack 14 through the heat exchange zone, to ensure that when the battery pack 1 is working, the ambient temperature around the battery pack 14 is stable, the working efficiency of the battery pack 14 is improved, and the working stability of the battery pack 1 is improved.

[0044] According to the battery pack 1 of the utility model, at least one partition beam 13 is arranged in the heat exchange zone of the bottom plate 11, and the end of the battery group 14 in the heat exchange zone is supported and fixed by the partition beam 13, and the bottom of the battery group 14 is stopped against the bottom plate 11, so as to ensure the stable installation of the battery group 14. There is no need to arrange a longitudinal beam structure between the battery groups 14, so as to save the internal space of the battery pack 1 to accommodate more battery groups 14 and improve the energy density of the battery pack 1. A cooling channel is arranged in the heat exchange zone, and the coolant circulates in the cooling channel to realize the heat exchange of the battery group 14 in the heat exchange zone, so as to ensure the stability of the working environment temperature of the battery group 14, improve the working efficiency of the battery group 14, and ensure the stable operation of the battery pack 1.

[0045] According to one embodiment of the utility model, the battery group 14 is constructed as a plurality of battery groups 14 arranged in sequence in a first direction, and each battery group 14 is provided with a plurality of battery cells arranged in sequence in a second direction; the bottom plate 11 is provided with a water inlet 10 and a water outlet 20, and the cooling flow channel includes 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 zone is constructed as a plurality of heat exchange zones and each heat exchange zone corresponds to a plurality of battery groups 14, and the bottom plate 11 forms a plurality of branch flow paths corresponding to the battery groups 14 in the heat exchange zone, 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.

[0046] Specifically, the first direction can be configured as the length direction of the bottom plate 11, and the second direction can be configured as the width direction of the bottom plate 11. The plurality of battery cells are sequentially arranged in the second direction to form a battery group 14. The battery pack 1 may include a plurality of battery groups 14. The plurality of battery groups 14 are sequentially arranged in the first direction. The plurality of battery groups 14 are arranged in the heat exchange area of ​​the bottom plate 11. A cooling channel is provided in the heat exchange area. The coolant flows in the cooling channel to exchange heat with the battery group 14 in the heat exchange area. The plurality of battery cells are respectively connected to the bottom plate 11. 1 is used to heat or cool multiple battery cells through the bottom plate 11. A heat exchange area is provided corresponding to multiple battery groups 14. Multiple branch flow paths are formed in each heat exchange area. A battery group 14 is provided corresponding to multiple branch flow paths. A water inlet flow path and a water outlet flow path are formed in the bottom plate 11. The bottom plate 11 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.

[0047] Among them, 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 during the flow process. A heat exchange area corresponds to multiple battery packs 14, and one battery pack 14 corresponds to multiple branch flow paths. The coolant flowing in the multiple branch flow paths can exchange heat with the battery pack 14, thereby improving the heat exchange effect of the battery pack 14. When the battery pack 14 is working, the ambient temperature around the battery pack 14 will affect the working efficiency of the battery pack 14. Therefore, the above-mentioned setting can make the temperature of the battery pack 14 more stable during operation, make the working efficiency of the battery pack 14 more stable, and thus improve the working stability of the battery pack 1. The present application sets multiple heat exchange zones in the bottom plate 11 and sets cooling channels in the heat exchange zones to exchange heat for the battery pack 14. One heat exchange zone is set corresponding to multiple battery packs 14 and one battery pack 14 is set corresponding to multiple branch flow paths. The multiple branch flow paths are suitable for heating or cooling the battery pack 14, which increases the heat exchange area of ​​the branch flow paths and improves the heat exchange effect of the bottom plate 11 on the battery pack 14, so that the temperature of the battery pack 14 is more stable during operation, thereby improving the working stability of the battery pack 1.

[0048] According to one embodiment of the utility model, in a heat exchange zone, a plurality of branch flow paths extend respectively along a first direction and are spaced apart in a second 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.

[0049] Specifically, the branch flow path extends in the second direction, and multiple branch flow paths are spaced apart in the first direction. 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 14 during the flow. 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 cells. 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, the phenomenon that some battery cells in the heat exchange area have good heat exchange effects and some battery cells have poor heat exchange effects can be avoided, so that the bottom plate 11 can more evenly exchange heat with multiple battery cells in the heat exchange area. In a heat exchange zone, at least some of the adjacent branch flow paths have opposite flow directions and are connected to each other. Therefore, the above-mentioned arrangement allows the coolant to flow continuously in 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.

[0050] In some embodiments, 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. Through the above-mentioned setting, multiple branch flow paths can be connected in series and / or in parallel with each other, which prolongs the time that the coolant stays in the heat exchange area and improves the heat exchange effect of the coolant on the battery pack 14. At the same time, it can be understood that the coolant flows along the first flow direction or the second flow direction, which will cause the heat exchange effect of the coolant to gradually decrease in the flow direction of the coolant, so that in a battery pack 14, some battery cells have good heat exchange effects and some battery cells have poor heat exchange effects. Therefore, by allowing the coolant to flow in the first flow direction and the second flow direction in multiple branch flow paths respectively, it is possible to achieve a more balanced heat exchange of multiple battery cells in the battery pack 14, thereby improving the heat exchange effect of the battery pack 14, making the temperature of the battery pack 14 more stable during operation, thereby making the working efficiency of the battery pack 14 more stable, and thus improving the working stability of the battery pack 14.

[0051] According to one embodiment of the utility model, 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 first direction, the first heat exchange zone and the third heat exchange zone are spaced apart in the second direction, the fourth heat exchange zone and the third heat exchange zone are spaced apart in the first direction, and the fourth heat exchange zone and the second heat exchange zone are spaced apart in the second direction, the water inlet 10 is arranged in the first heat exchange zone, and the water outlet 20 is arranged in the third heat exchange zone.

[0052] Specifically, a first heat exchange area, a second heat exchange area, a third heat exchange area, and a fourth heat exchange area are arranged in a "field" shape on the bottom plate 11. The layout of multiple heat exchange areas is compact and regular, improving the space utilization rate of the bottom plate 11. At the same time, the manufacturing process of the bottom plate 11 is simplified, and the production efficiency of the bottom plate 11 is improved.

[0053] 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, and 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, and after the coolant exchanges heat with the second heat exchange area, it returns to the third heat exchange area 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 area, the second heat exchange area, and the third heat exchange area; the coolant enters the third heat exchange area through the water inlet flow path, and after the coolant exchanges heat with the third heat exchange area, 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 area and the third heat exchange area; the coolant can enter the fourth heat exchange area through the water inlet flow path, and after the coolant exchanges heat with the fourth heat exchange area, it returns to the third heat exchange area 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 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 extended, and the utilization rate of the coolant is improved.

[0054] According to an embodiment of the utility model, a 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, and a plurality of third branch flow paths 33 are constructed to be connected to each other, and a plurality of third branch flow paths 33 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 respectively connected to the plurality of third branch flow paths 33, and 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; the water inlet flow path includes a first water inlet flow path 41, a second water inlet flow path 42, The water flow path 42 and the third water inlet flow path 43, one end of the first water inlet flow path 41 is connected to the water inlet 10, at least a part of the first water inlet flow path 41 is arranged on the periphery of the first heat exchange zone, and 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. 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. 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 on the edge is good. Therefore, the above-mentioned arrangement can improve the heating effect of the edge of the battery pack 14 corresponding to the second heat exchange zone, and improve the cold start capability of the battery pack 14.

[0055] Among the 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 water outlet flow path. Of course, one end of one of the multiple third branch flow paths 33 can also be connected to 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 connected to the water outlet flow path, which is not limited here.

[0056] Among them, in a heat exchange area, the part of the battery pack 14 close to the periphery of the heat exchange area is constructed as an edge part. Since the edge part has a large contact area with the external environment, when the bottom plate 11 heats the multiple battery packs 14, the heat loss of the edge part is large, resulting in a low heating efficiency of the bottom plate 11 on the battery pack 14. When the bottom plate 11 heats the battery pack 14, the coolant starts to heat the multiple battery packs 14 corresponding to the heat exchange area 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 coolant when flowing in the first branch flow path 31 and the second branch flow path 32 is small, the first branch flow path 31 and the second branch flow path 32 have a better heating effect on the edge part. Therefore, through the above-mentioned 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 14 corresponding to the heat exchange area more evenly, improves the heating effect of the battery pack 14 corresponding to the heat exchange area, and improves the cold start capability of the battery pack 1.

[0057] 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 and then enters 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 base plate 11, 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.

[0058] 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. 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 pack 14 corresponding to the first heat exchange zone and improving the cold start capability of the battery pack 14.

[0059] 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, and / or, 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. 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 then 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, thereby improving the utilization rate of the coolant. 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 is connected. At this time, in the first 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, and 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. As the coolant flows, the heat loss of the coolant increases. Therefore, through the above-mentioned arrangement, in the fourth heat exchange zone, the branch flow path with larger heat loss is arranged 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 group 14 corresponding to the fourth heat exchange zone more balanced.

[0060] 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, and 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.

[0061] According to an embodiment of the utility model, 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 cooling efficiency. The utilization rate of the cooling liquid is improved. At the same time, the first water outlet flow path 51 collects the cooling liquid in multiple branch flow paths in the second heat exchange zone. Therefore, 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 zone. When the cooling liquid flows in the first water outlet flow path 51 and exchanges heat with the edge of the fourth heat exchange zone and the third heat exchange zone, the large flow rate of the cooling liquid in the first water outlet flow path 51 can improve the heating effect on the edge of the fourth heat exchange zone and the third heat exchange zone, so that the bottom plate 11 heats the multiple battery packs 14 more evenly, thereby improving the cold start capability of the battery pack 14.

[0062] 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, 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 base plate 11, and improving the production efficiency of the base plate 11. At the same time, the second water outlet flow path 52 collects the coolant in multiple branch flow paths in the first heat exchange zone. 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 paths of the first heat exchange zone, thereby improving the heating effect of the edge of the battery pack 14 corresponding to the second heat exchange zone and the fourth heat exchange zone respectively.

[0063] 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 14 corresponding to the third heat exchange zone.

[0064] 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 portions 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 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 portions of the battery pack 14 corresponding to the fourth heat exchange zone and the third heat exchange zone, respectively.

[0065] In some embodiments, 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, and the water inlet 10 of the bottom plate 11 is connected to the cooling device through the first pipe, and the water outlet 20 of the bottom plate 11 is connected to the cooling device through the second pipe. Therefore, the connection process of the bottom plate 11 and the cooling device can be simplified through the above arrangement. 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 bottom plate 11 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, which further simplifies the connection process of the bottom plate 11 and the cooling device.

[0066] In some embodiments, 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 zone and the third heat exchange zone. It can be understood that at least part of the third water inlet flow path 43 can exchange heat with the edge of the first heat exchange zone, and at least part of the third water outlet flow path 53 can exchange heat with the edge of the third heat exchange zone. At the same time, through the above arrangement, at least part of the third water inlet flow path 43 and at least part of the third water outlet flow path 53 can be arranged adjacent to each other, so that the edge of the battery pack 14 corresponding to the first heat exchange zone and the third heat exchange zone can be more balanced during heat exchange.

[0067] In some embodiments, 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. 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, so that the flow rate of the branch flow path is smaller. 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 closer to the third heat exchange zone. The distance between the 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 with the battery groups 14 corresponding to the first heat exchange zone, the second heat exchange zone, the third heat exchange zone and the fourth heat exchange zone, respectively, is more balanced.

[0068] In some embodiments, 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. The flow resistance of the coolant in the branch flow path can be controlled by setting a block in the branch flow path, or by controlling the cross-sectional area of ​​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.

[0069] According to one embodiment of the utility model, both ends of the partition beam 13 extend to be connected with the frame 12, and the surfaces of the two adjacent partition beams 13 facing each other are respectively formed with a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are arranged opposite to each other in the second direction; wherein the two ends of the multiple battery groups 14 are respectively stopped at the first limiting surface and the second limiting surface, and the two adjacent battery groups 14 in the first direction are spaced apart.

[0070] Both ends of each battery pack 14 are respectively stopped at the first limit surface and the second limit surface, and the bottom of each battery pack 14 is fixed to the bottom plate 11 to ensure that the multiple battery packs 14 are stably arranged in the battery pack 1. The battery packs 14 can be fixed without arranging a longitudinal beam structure between the battery packs 14, which is beneficial to reducing the weight of the battery pack 1 and saving more space in the battery pack 1, so that the battery pack 1 can accommodate more battery packs 14 to improve the energy density of the battery pack 1; two adjacent battery packs 14 in the first direction are arranged at intervals to avoid heat accumulation and uneven temperature of the battery pack 14 during the heating process, thereby ensuring that the battery pack 14 works within a suitable temperature range.

[0071] According to one embodiment of the utility model, the battery pack 14 includes a first battery 141 and a second battery 142, the first battery 141 is configured as a plurality of batteries arranged sequentially in the second direction; the second battery 142 is configured as a plurality of batteries arranged sequentially in the second direction, and any first battery 141 and the second battery 142 are correspondingly arranged in the first direction.

[0072] Specifically, the first battery 141 and the second battery 142 are respectively constructed as a plurality of batteries arranged in sequence in the second direction, and a battery group 14 includes two columns of batteries extending in the second direction and facing each other in the first direction. By spacing and arranging a column of first batteries 141 and a column of second batteries 142 in parallel in the first direction and constructing them into a battery group 14, the spacing between the first battery 141 and the second battery 142 can enable the first battery 141 and the second battery 142 to have relatively independent spaces when heated, thereby alleviating the degree of heat accumulation and temperature unevenness, and reducing the temperature difference inside the battery group 14.

[0073] According to one embodiment of the utility model, the battery pack 14 also includes an end plate 15, which is arranged at both ends of the battery pack 14, and the end plate 15 is respectively formed with a supporting surface and a matching surface 151 on both sides in the thickness direction, wherein the supporting surface is suitable for being fitted with the end surface of the battery pack 14, and the matching surface 151 is suitable for being fitted with the partition beam 13; wherein a guide surface 151 is formed at the bottom of the end plate 15, and the guide surface 151 is inclined toward the supporting surface in the direction toward the bottom.

[0074] Specifically, the support surface of the end plate 15 is arranged to fit with the end surface of the battery pack 14 to limit the movement of the battery pack 14 and protect the battery pack 14 from external impact and friction damage. By forming a guide surface 151 at the bottom of the end plate 15, when the battery pack 14 is placed in the battery pack 1, the guide surface 151 of the end plate 15 first contacts the frame 12 of the battery pack 1. Since the guide surface 151 is arranged to be inclined toward the support surface in the direction toward the bottom, when the battery pack 14 is pressed down to move the battery pack 14 into the battery pack 1, the guide surface 151 can guide the battery pack 14 to enter the battery pack 1 smoothly, and the battery pack 14 is easy to install. In addition, the guide surface 151 cooperates with the frame 12 of the battery pack 1 to generate a tightening force to press the battery pack 14, and the tightening force can compress the battery pack 14, so that the battery pack 14 is more stable and firm in the battery pack 1. After the guide surface 151 is separated from the frame 12, the mating surface 151 will contact and cooperate with the partition beam 13 to tighten the battery pack 14 in the battery pack 1.

[0075] According to one embodiment of the utility model, the battery pack 14 also includes a heating film 16, which extends in the second direction. The heating film 16 is respectively arranged to fit the first battery 141 and the second battery 142 on both sides in the thickness direction, and the two ends of the heating film 16 are respectively fixed to the end plates 15 located at both ends of the battery pack 14.

[0076] Specifically, the heating film 16 is arranged between the first battery 141 and the second battery 142, and the two sides of the heating film 16 in the thickness direction are respectively arranged to fit the first battery 141 and the second battery 142. The heating film 16 can generate heat to heat the first battery 141 and the second battery 142 at the same time, thereby improving the heating efficiency of the battery pack 1 and reasonably controlling the temperature of the battery pack 1, thereby extending the service life of the battery and maintaining the battery performance. One heating film 16 can heat two columns of batteries in the battery pack 1, which is beneficial to reducing the number of heating films 16 in the battery pack 1 to optimize the space utilization inside the battery pack 1, thereby reducing the size and weight of the battery pack 1 and realizing lightweight battery pack 1.

[0077] In some embodiments, the heating film 16 includes a first heating sheet, a second heating sheet and a heat insulating member. The first heating sheet is arranged in close contact with the first battery 141 and is suitable for heating the first battery 141; the second heating sheet is arranged in close contact with the second battery 142 and is suitable for heating the second battery 142; the heat insulating member is arranged between the first heating sheet and the second heating sheet. By arranging the heat insulating member between the first heating sheet and the second heating sheet, the heat insulating member has the function of heat preservation and heat insulation, which can reduce the heat loss between the first battery 141 and the second battery 142, and the heat in the battery pack 1 will be dissipated to the outside more slowly. Therefore, the battery in the battery pack 1 can be kept at a suitable temperature for a long time, and the battery performance is more stable. The heat insulating member can be constructed as heat insulating foam.

[0078] An electrical connector is provided between the first heating plate and the second heating plate, and the electrical connector connects the first heating plate and the second heating plate to an external power source to supply power to the heating film 16 .

[0079] According to one embodiment of the utility model, a first gap is formed between two adjacent first batteries 141, and a second gap is formed between two adjacent second batteries 142; an avoidance hole 161 is formed on the heating film 16 assembly and penetrates in the first direction, one end of the avoidance hole 161 is opposite to the first gap, and the other end of the avoidance hole 161 is opposite to the second gap.

[0080] By providing a first gap between two adjacent first batteries 141 and a second gap between two adjacent second batteries 142, the first gap and the second gap can relieve the pressure between the first batteries 141 and the second batteries 142 caused by thermal expansion and mechanical deformation, reduce the risk of the batteries being squeezed against each other and damaged, and extend the service life of the battery pack 1. By providing an avoidance hole 161 that penetrates in the first direction on the heating film 16, one end of the avoidance hole 161 is opposite to the first gap, and the other end of the avoidance hole 161 is opposite to the second gap. The heating door will not generate heat at the avoidance hole 161, and the heat generated by the heating film 16 can be fully transferred to the first battery 141 and the second battery 142, which can reduce the risk of local overheating of the battery and improve the quality and reliability of the battery pack 1.

[0081] The vehicle according to the present utility model is briefly described below.

[0082] The vehicle according to the utility model includes the battery pack 1 described in any one of the above embodiments. Since the vehicle according to the utility model includes the battery pack 1 described in any one of the above embodiments, the battery pack 1 in the vehicle according to the utility model has high heat exchange efficiency and the battery pack 1 operates stably.

[0083] In the description of the present invention, 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", "axial", "radial", "circumferential" and the like 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 the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0084] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0085] In the description of the present invention, "plurality" means two or more.

[0086] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0087] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 utility model. In this specification, the schematic representation of the above terms does 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.

[0089] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A bottom plate, wherein the bottom plate is provided with a heat exchange area, and the bottom plate is provided with a cooling flow channel in the heat exchange area; A frame, the frame is disposed around the outer periphery of the bottom plate and defines a battery receiving cavity with the bottom plate; A partition beam, the partition beam is arranged on the bottom plate and located in the battery accommodating cavity, the partition beam is configured as at least one of the partition beams extending in a first direction and spaced apart in a second direction, one of the partition beams or two adjacent partition beams are arranged in the heat exchange area or located at the edge of the heat exchange area, the two adjacent partition beams and the heat exchange area jointly define an installation cavity or one of the partition beams and the frame edge and the heat exchange area jointly define the installation cavity; A battery pack, the battery pack being received in the mounting cavity and being configured as a plurality of groups arranged sequentially in a first direction; in Each battery pack is provided with a plurality of battery cells, the plurality of battery cells extend in the second direction and are arranged in sequence along the first direction; and / or the plurality of battery cells extend in the first direction and are arranged in sequence along the second direction, and the bottom plate is suitable for heat exchange of the battery pack.

2. The battery pack according to claim 1, characterized in that: The battery pack is configured as a plurality of battery cells sequentially arranged in a first direction, and each of the battery packs is provided with a plurality of battery cells sequentially arranged in a second direction; The bottom plate is provided with a water inlet and a water outlet, and the cooling flow channel includes a water inlet flow path connected to the water inlet and a water outlet flow path connected to the water outlet; The heat exchange area is constructed in multiples and each of the heat exchange areas corresponds to the multiple battery groups. The bottom plate forms multiple branch flow paths corresponding to the battery groups 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.

3. The battery pack according to claim 2, characterized in that: In one of the heat exchange zones, a plurality of the branch flow paths extend respectively in the first direction and are spaced apart in the second direction, the coolant in at least one of the branch flow paths flows along the first flow direction, and the coolant in at least another of the branch flow paths flows along the second flow direction, and the first flow direction is opposite to the second flow direction.

4. The battery pack according to claim 2, characterized in that: The plurality of 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, wherein the first heat exchange zone and the second heat exchange zone are spaced apart in the first direction, the first heat exchange zone and the third heat exchange zone are spaced apart in the second direction, the fourth heat exchange zone and the third heat exchange zone are spaced apart in the first direction and the fourth heat exchange zone and the The second heat exchange areas are spaced apart in the second direction, the water inlet is arranged in the first heat exchange area, and the water outlet is arranged in the third heat exchange area.

5. The battery pack according to claim 4, characterized in that: The plurality of branch flow paths include: a first branch flow path and a second branch flow path, wherein the first branch flow path and the second branch flow path are respectively arranged on both sides of the heat exchange area in a first direction; a third branch flow path, wherein the third branch flow paths are configured as a plurality of the third branch flow paths connected to each other, and the plurality of the third branch flow paths are arranged between the first branch flow path and the second branch flow path; The first branch flow path and the second branch flow path are connected through a plurality of the third branch flow paths; wherein In at least one of the heat exchange zones, the first branch flow path is connected to the water inlet flow path, the second branch flow path is connected to the water outlet flow path, and / or The first branch flow path and the second branch flow path of at least one heat exchange zone are respectively connected to the water inlet flow path, and at least one third branch flow path is connected to the water outlet flow path; The water inlet flow path comprises: a first water inlet flow path, one end of which is in communication with the water inlet, at least a portion of which is disposed at the periphery of the first heat exchange zone, and the other end of which is in communication with the first branch flow path and the second branch flow path of the second heat exchange zone; a second water inlet flow path, one end of which is in communication with the water inlet, and the other end of which is in communication with the first branch flow path and the second branch flow path of the first heat exchange zone; A third water inlet flow path, one end of the third water inlet flow path is connected to the water inlet, the other end of the third water inlet flow path is connected to the first branch flow path of the third heat exchange zone, and / or the other end of the third water inlet flow path is connected to the first branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths.

6. The battery pack according to claim 5, characterized in that: The water outlet flow path comprises: a first water outlet flow path, one end of which is connected to at least one of the third branch flow paths of the second heat exchange zone, and the other end of which flows through the outer peripheries of the fourth heat exchange zone and the third heat exchange zone in sequence and is connected to the water outlet pipe; a second water outlet flow path, one end of which is connected to at least one of the third branch flow paths of the first heat exchange zone, and the other end of which flows through the peripheries of the second heat exchange zone and the fourth heat exchange zone in sequence and is connected to the first water outlet flow path; a third water outlet flow path, one end of which is connected to the second branch flow path of the third heat exchange zone, and the other end of which flows through the periphery of the third heat exchange zone and is connected to the water outlet; A fourth water outlet flow path, one end of which is connected to the second branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths, and the other end of which 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.

7. The battery pack according to claim 1, characterized in that: Both ends of the partition beam extend to be connected to the frame, and surfaces of two adjacent partition beams facing each other are respectively formed with a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface are arranged opposite to each other in the second direction; in Two ends of the plurality of battery packs are respectively abutted against the first limiting surface and the second limiting surface, and two adjacent battery packs in the first direction are spaced apart.

8. The battery pack according to claim 7, characterized in that: The battery pack comprises: a first battery, wherein the first battery is configured to be arranged in sequence in a second direction in plurality; The second battery is configured to be a plurality of batteries arranged sequentially in the second direction, and any one of the first battery and the second battery are arranged correspondingly in the first direction.

9. The battery pack according to claim 8, characterized in that: Also includes: End plates, the end plates are arranged at both ends of the battery pack, and the end plates are respectively formed with a supporting surface and a matching surface on both sides in the thickness direction, the supporting surface is suitable for being fitted with the end surface of the battery pack, and the matching surface is suitable for being fitted with the partition beam; wherein The bottom of the end plate forms a guide surface, and the guide surface is inclined toward the support surface in a direction toward the bottom.

10. The battery pack according to claim 9, characterized in that: The battery pack further comprises: A heating film, the heating film extends in the second direction, the two sides of the heating film in the thickness direction are respectively arranged to fit the first battery and the second battery, and the two ends of the heating film are respectively fixed to the end plates located at the two ends of the battery pack.

11. The battery pack according to claim 10, characterized in that: A first gap is formed between two adjacent first batteries, and a second gap is formed between two adjacent second batteries; an avoidance hole is formed on the heating film assembly and penetrates in a first direction, one end of the avoidance hole is opposite to the first gap, and the other end of the avoidance hole is opposite to the second gap.

12. A vehicle, characterized in that: A battery pack comprising any one of claims 1 to 11.

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