Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises: a housing, an installation cavity is formed in the housing, and the housing is provided with a flow inlet and a flow outlet which are communicated with the installation cavity; the battery module is mounted in the mounting cavity, the battery module comprises a mounting bracket and a plurality of battery cells mounted on the mounting bracket, cooling gaps distributed around the battery cells are formed among the battery cells, the mounting bracket and the shell, a first shunting hole is formed in one end of each battery cell of the mounting bracket, and a second shunting hole is formed in the other end of each battery cell of the mounting bracket; cooling liquid at the flow inlet is suitable for flowing to the cooling gap from the first flow dividing hole and flowing to the flow outlet after passing through the second flow dividing hole. According to the battery pack disclosed by the utility model, the first shunting hole is formed in one end of the mounting bracket, and the second shunting hole is formed in the other end of the mounting bracket, so that the cooling liquid can flow to the cooling gap along the first shunting hole, the cooling liquid can be distributed on the periphery and the end part of the battery cell, and the cooling area is increased so as to improve the cooling effect of the battery cell.

Description

Technical Field

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

[0002] With the penetration of new energy products into the automotive industry, more and more vehicles are adopting hybrid architectures, which not only meets the trend of energy conservation and emission reduction, but also can use the low-torque response of the motor to make up for the shortcomings of pure internal combustion engines and improve performance. However, for new energy high-performance vehicles, especially those that rely heavily on electrical performance, the performance of the battery directly determines the power performance of the entire vehicle, and the performance of the battery pack is restricted by the cooling capacity.

[0003] Among them, traditional liquid cooling plates cannot meet the heat dissipation needs of vehicle batteries. Very few high-performance vehicles use immersion cooling. The ends of some battery cells are fixed by a wrapping structure, and only the sides of the cylindrical battery cells can be cooled, or the battery cells are fixed on the sides, and the ends (electrodes) and part of the sides of the battery cells are cooled, which results in poor cooling of the battery cells and a decrease in the performance of the entire package. There is room for improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery pack, which can distribute the coolant on the periphery and ends of the battery cell, thereby increasing the contact area between the coolant and the battery cell, that is, increasing the cooling area, so as to improve the cooling effect of the battery cell.

[0005] A battery pack according to an embodiment of the utility model includes: a shell having an installation cavity formed therein, and the shell is provided with an inlet and an outlet communicated with the installation cavity; a battery module, the battery module is installed in the installation cavity, the battery module includes a mounting bracket and a plurality of battery cells installed on the mounting bracket, a cooling gap distributed around the battery cells is formed between the battery cells, the mounting bracket and the shell; the mounting bracket is provided with a first diverter hole at one end of the battery cell and a second diverter hole at the other end, and the coolant at the inlet is suitable for flowing from the first diverter hole to the cooling gap and then flowing to the outlet after passing through the second diverter hole.

[0006] According to the battery pack of the embodiment of the utility model, a first diverter hole is arranged at one end of the mounting bracket and a second diverter hole is arranged at the other end. In this way, the coolant can flow along the first diverter hole to the cooling gap, and the coolant can be distributed on the periphery and end of the battery cell, thereby increasing the contact area between the coolant and the battery cell, that is, increasing the cooling area, so as to improve the cooling effect of the battery cell.

[0007] According to the battery pack of some embodiments of the utility model, the mounting bracket includes a first bracket and a second bracket, and the first bracket and the second bracket are respectively connected to the two ends of the battery cell; wherein, an inlet area is defined between the first bracket and the shell, the first diversion hole is arranged on the first bracket and connected between the inlet area and the inlet end of the cooling gap, and an outlet area is defined between the second bracket and the shell, the second diversion hole is arranged on the second bracket and connected between the outflow area and the outlet end of the cooling gap.

[0008] According to the battery pack of some embodiments of the present invention, the first bracket includes a plurality of the first shunt holes, the second bracket includes a plurality of the second shunt holes, and the plurality of the first shunt holes, the plurality of the second shunt holes, and the plurality of the battery cells are distributed in one-to-one correspondence.

[0009] According to the battery pack of some embodiments of the present invention, the first bracket is formed with a first stop portion, the first stop portion stops at one end of the battery cell and forms a first current flow gap between the one end of the battery cell and the first bracket, and the first current flow gap is connected between the first shunt hole and the cooling gap;

[0010] And / or, the second bracket is formed with a second stop portion, the second stop portion stops at the other end of the battery cell and forms a second current flow gap between the other end of the battery cell and the second bracket, and the second current flow gap is connected between the second shunt hole and the cooling gap.

[0011] According to the battery pack of some embodiments of the present invention, the second bracket is provided with a flow focusing portion, the flow focusing portion is located in the cooling gap and the flow focusing portion protrudes and extends from the second bracket toward the first bracket, and the outer diameter of the flow focusing portion is constructed to gradually decrease in the direction approaching the inlet.

[0012] According to the battery pack of some embodiments of the present invention, the extension length of the converging portion is greater than half of the distance between the first bracket and the second bracket.

[0013] According to the battery pack of some embodiments of the present invention, the shell further forms an inlet cavity and an outlet cavity, the inlet cavity is connected between the inlet area and the inlet port, and the outlet cavity is connected between the outflow area and the outlet port.

[0014] According to the battery pack of some embodiments of the present invention, the inlet cavity and the outlet cavity are respectively located on two sides of the shell away from each other, and the inlet port and the outlet port are open in directions away from each other.

[0015] According to the battery pack of some embodiments of the present invention, the cooling gap extends along the first direction, the battery cells are multiple, and the multiple battery cells are distributed in multiple columns in the second direction and in multiple rows in the third direction.

[0016] The utility model also provides a vehicle.

[0017] A vehicle according to an embodiment of the utility model is provided with a battery pack according to any one of the above embodiments.

[0018] The advantages of the vehicle and the above-mentioned battery pack over the prior art are the same and will not be elaborated here.

[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 The structure of the battery pack according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the battery pack according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3 is a top view of a battery pack according to an embodiment of the utility model;

[0024] Figure 4 is a cross-section of a battery pack according to an embodiment of the utility model Figure 1 ;

[0025] Figure 5 is a cross-section of a battery pack according to an embodiment of the utility model Figure 2 ;

[0026] Figure 6 is a schematic structural diagram of a battery module of a battery pack according to an embodiment of the utility model;

[0027] Figure 7 is a schematic structural diagram of a second bracket of a battery pack according to an embodiment of the utility model;

[0028] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0029] Reference numerals:

[0030] Battery pack 100,

[0031] Shell 1, mounting cavity 11, inlet 12, outlet 13, inlet area 14, outlet area 15, inlet cavity 16, outlet cavity 17, battery module 2, mounting bracket 21, first bracket 211, first diversion hole 2111, first stop portion 2112, first flow gap 2113, second bracket 212, second diversion hole 2121, second stop portion 2122, second flow gap 2123, focusing portion 213, battery cell 22, cooling gap 23. DETAILED DESCRIPTION

[0032] 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.

[0033] In the description of the present utility model, it is necessary to understand 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference below Figure 1-Figure 8A battery pack 100 according to an embodiment of the utility model is described. By setting a first diverter hole 2111 at one end of the mounting bracket 21 and a second diverter hole 2121 at the other end, the coolant can flow along the first diverter hole 2111 to the cooling gap 23, and the coolant can be distributed on the periphery and end of the battery cell 22, thereby increasing the contact area between the coolant and the battery cell 22, that is, increasing the cooling area, so as to improve the cooling effect of the battery cell 22.

[0036] like Figure 1-Figure 8 As shown, a battery pack 100 according to an embodiment of the present invention includes: a housing 1 and a battery module 2.

[0037] An installation cavity 11 is formed in the shell 1. Specifically, the shell 1 is the external structure of the battery pack 100, which can realize the placement or installation of structures such as the battery module 2, and can play a protective role to ensure that the external structure of the battery pack 100 is neat. Among them, the installation cavity 11 is formed in the shell 1. The installation cavity 11 is matched with the shape of the shell 1, which can provide a larger space for the installation of other structures, and the shell 1 is provided with an inlet 12 and an outlet 13 connected to the installation cavity 11. The inlet 12 is used for the inflow of coolant, and the outlet 13 is used for the outflow of coolant. In this way, the external coolant flows into the installation cavity 11 from the inlet 12, and after the internal structure of the installation cavity 11 is cooled and dissipated, the coolant flows out of the shell 1 from the outlet 13. Among them, the shell 1 can be constructed as a square structure. On the outer wall of the shell 1, the inlet 12 and the outlet 13 can be distributed along the opposite side walls of the shell, or the inlet 12 and the outlet 13 are distributed on the same side wall or adjacent side walls.

[0038] The battery module 2 is installed in the installation cavity 11, such as the battery module 2 is detachably connected to the inner wall of the installation cavity 11, the battery module 2 includes a mounting bracket 21 and a plurality of battery cells 22 mounted on the mounting bracket 21, specifically, the battery module 2 is a collection of battery cell 22 units, wherein the plurality of battery cells 22 are detachably connected to the mounting bracket 21, such as the two can be connected by pressing or snapping, so that the mounting bracket 21 can realize the connection of the plurality of battery cells 22, integrate the plurality of battery cells 22 into one, and provide the required voltage and current.

[0039] A cooling gap 23 distributed around the battery cell 22 is formed between the battery cell 22, the mounting bracket 21 and the shell 1, that is, the cooling gap 23 distributed around the battery cell 22 can be formed by the mounting bracket 21 and the shell 1, and the cooling gap 23 is used to flow the coolant. After multiple battery cells 22 are installed on the mounting bracket 21, multiple cooling gaps 23 are formed therein, and the multiple cooling gaps 23 are respectively distributed around the periphery of the multiple battery cells 22, so that the coolant can fill the periphery of the battery cell 22. In this way, the battery cell 22 can be immersed in the coolant, which increases the contact area between the coolant and the battery cell 22, thereby improving the cooling effect of the battery cell 22, and the cooling gap 23 is connected between the inlet 12 and the outlet 13, so that the coolant can be introduced from the inlet 12 into the cooling gap 23, and flows out from the outlet 13 through the cooling gap 23, thereby realizing the cooling of the battery cell 22.

[0040] The mounting bracket 21 is provided with a first diversion hole 2111 at one end of the battery core 22 and a second diversion hole 2121 at the other end. The coolant at the inlet 12 is suitable for flowing from the first diversion hole 2111 to the cooling gap 23 and then flowing to the outlet 13 after passing through the second diversion hole 2121.

[0041] Specifically, the first diverter hole 2111 and the second diverter hole 2121 are both used for the circulation of cooling liquid, wherein the battery cell 22 can be a cylindrical battery cell 22, the first diverter hole 2111 and the second diverter hole 2121 can be constructed as a circular hole, an elliptical hole, etc., the first diverter hole 2111 and the second diverter hole 2121 are distributed opposite to each other at both ends of the battery cell 22, the first diverter hole 2111 connects the inlet 12 with the cooling gap 23, and the second diverter hole 2121 connects the cooling gap 23 with the outlet 13, so that the cooling liquid flows in from the inlet 12 and flows from the first diverter hole 2111 into the cooling gap 23, and the cooling liquid contacts the end and periphery of the battery cell 22, and flows from the second diverter hole 2121 to the outlet 13 after absorbing the heat of the battery cell 22, thereby realizing the flow of the cooling liquid and the heat dissipation of the battery cell 22 by the cooling liquid.

[0042] Therefore, the two ends of the traditional battery cell 22 are fixed by wrapping, which will prevent the bottom of the battery cell 22 from contacting the coolant, thereby reducing the cooling effect of the battery cell 22. In the present embodiment, the coolant can be introduced into the cooling gap 23 from the end of the battery cell 22 through the first diversion hole 2111, thereby ensuring that the coolant can be accurately distributed to the periphery and end of each battery cell 22, thereby increasing the contact area between the coolant and the battery cell 22, thereby avoiding local high heat at the bottom and periphery of the battery cell 22, thereby improving the cooling effect of the battery cell 22, making the cooling of the battery cell 22 more uniform, thereby improving the working stability of the battery cell 22, and ensuring the optimal performance and longest life of the battery cell 22.

[0043] According to the battery pack 100 of the embodiment of the utility model, a first diverter hole 2111 is provided at one end of the mounting bracket 21 and a second diverter hole 2121 is provided at the other end. In this way, the coolant can flow along the first diverter hole 2111 to the cooling gap 23, and the coolant can be distributed on the periphery and end of the battery cell 22, thereby increasing the contact area between the coolant and the battery cell 22, that is, increasing the cooling area, so as to improve the cooling effect of the battery cell 22.

[0044] In some embodiments, the mounting bracket 21 includes a first bracket 211 and a second bracket 212, and the first bracket 211 and the second bracket 212 are respectively connected to the two ends of the battery cell 22. For example, the first bracket 211 and the second bracket 212 are respectively connected to the battery cell 22 in the same manner, and can be connected by snap connection or press fit. In specific design, the structures of the first bracket 211 and the second bracket 212 can be the same, such as Figure 6 As shown, the first bracket 211 and the second bracket 212 are spaced apart and respectively connect the battery cells 22 along the length direction of the battery cells 22, which can evenly distribute the force on the battery cells 22 and reduce deformation or damage caused by uneven force. The first bracket 211 and the second bracket 212 simultaneously fix and support multiple battery cells 22 to achieve the integration of multiple battery cells 22, and the connection method is simple and stable.

[0045] Among them, an inlet area 14 is defined between the first bracket 211 and the shell 1, the first diversion hole 2111 is arranged on the first bracket 211 and connected between the inlet area 14 and the inlet end of the cooling gap 23, and an outlet area 15 is defined between the second bracket 212 and the shell 1, and the second diversion hole 2121 is arranged on the second bracket 212 and connected between the outlet area 15 and the outlet end of the cooling gap 23.

[0046] Specifically, Figure 5 As shown, the inlet area 14 is located in the coolant inlet area of ​​the battery module 2, the outflow area 15 is located in the coolant outlet area of ​​the battery module 2, and the first bracket 211 and the second bracket 212 are distributed at both ends of the battery cell 22, that is, the inlet area 14 and the outflow area 15 can be relatively distributed, so that the inlet area 14 is between the shell 1 and the first bracket 211, the outflow area 15 is between the shell 1 and the second bracket 212, and a cooling gap 23 is provided between the first bracket 211 and the second bracket 212. In this way, in the flow direction of the liquid, the inlet area 14, the cooling gap 23, and the outflow area 15 are connected in sequence, and the first diversion hole 2111 passes through the first bracket 211 along the flow direction of the coolant to connect the inlet area 14 with the cooling gap 23, and the second diversion hole 2121 passes through the second bracket 212 along the flow direction of the coolant to connect the cooling gap 23 with the outflow area 15.

[0047] Therefore, after the battery module 2 is working, the coolant flows into the inlet area 14 from the inlet 12, passes through the first diversion hole 2111 and then enters the cooling gap 23. After the coolant absorbs the heat of the battery cell 22, it enters the outlet area 15 from the second diversion hole 2121, and is finally discharged from the outlet 13. In this way, continuous cooling of the battery cell 22 can be achieved, and by setting the inlet area 14 and the outlet area 15, the inlet area 14 can cover the entire first bracket 211, and multiple battery cells 22 can be distributed with coolant at the same time. The outlet area 15 covers the entire second bracket 212, and the coolant can flow into one area at the same time, thereby improving the heat dissipation efficiency of the coolant to multiple battery cells 22.

[0048] In some embodiments, the first bracket 211 includes a plurality of first diversion holes 2111 , the second bracket 212 includes a plurality of second diversion holes 2121 , and the plurality of first diversion holes 2111 , the plurality of second diversion holes 2121 and the plurality of battery cells 22 are distributed in a one-to-one correspondence.

[0049] Specifically, Figure 6 As shown, a plurality of first diverter holes 2111 penetrate the first bracket 211 along the flow direction of the coolant, and a plurality of second diverter holes 2121 penetrate the second bracket 212 along the flow direction of the coolant. The first diverter holes 2111 and the second diverter holes 2121 can be constructed as circular holes. The plurality of first diverter holes 2111 and the plurality of second diverter holes 2121 are arranged opposite to each other and correspond to each battery cell 22 respectively. In this way, the coolant in the inlet area 14 can flow to the plurality of battery cells 22 through the plurality of first diverter holes 2111, that is, flow to the plurality of cooling gaps 23. After the coolant absorbs the heat of the plurality of battery cells 22, it flows from the plurality of second diverter holes 2121 to the outlet area 15, thereby realizing the flow of the coolant and the heat dissipation of the coolant to the battery cells 22.

[0050] Therefore, through a one-to-one corresponding setting, the coolant can be accurately distributed to each battery cell 22, achieving a more uniform cooling effect, and preventing the coolant from being unevenly distributed in the shell 1, ensuring that all battery cells 22 can be properly cooled, reducing local hot spots that may appear on the surface of the battery cell 22, improving the working stability of the battery cell 22, and ensuring the best performance and longest life of the battery cell 22.

[0051] In some embodiments, the first bracket 211 is formed with a first stop portion 2112, which stops at one end of the battery cell 22 and forms a first current flow gap 2113 between one end of the battery cell 22 and the first bracket 211, and the first current flow gap 2113 is connected between the first diversion hole 2111 and the cooling gap 23.

[0052] Specifically, the first stop portion 2112 is used to support the battery cell 22. The first bracket 211 is provided with a first stop portion 2112 on a side close to the second bracket 212. In actual design, Figure 5 and Figure 8 As shown, the first stop portion 2112 can be constructed as a bracket leg, which protrudes and extends toward the second bracket 212. The first stop portion 2112 is located at the outer periphery of the first diversion hole 2111, and a stop notch is provided on the side close to the first diversion hole 2111, wherein there are multiple first stop portions 2112, and the multiple first stop portions 2112 are distributed around the first diversion hole 2111 at intervals. The first stop portions 2112 are divided into six groups, and each group includes two first stop portions 2112. wherein the battery cell 22 can be a cylindrical battery cell 22. During installation, one end of the battery cell 22 is pressed against the multiple stop notches to achieve connection between one end of the battery cell 22 and the first bracket 211, and the battery cell 22 can be circumferentially limited. The connection method is simple and reliable. When the battery cell 22 is of other structures, the first stop portion 2112 can be matched with the battery cell 22 to achieve reliable connection between the two.

[0053] like Figure 5 As shown, after multiple first stop portions 2112 are connected to the battery cells 22, there is a certain gap between the battery cells 22 and the first bracket 211 to form a first flow gap 2113. The first flow gap 2113 connects the first diverter hole 2111 with the cooling gap 23, and there are multiple first flow gaps 2113 around the first diverter hole 2111, so that the coolant can enter the multiple first flow gaps 2113 at the first diverter hole 2111, and the coolant can be evenly distributed, so that the coolant distribution around each battery cell 22 is more even, the heat dissipation effect is better, and local high heat of the battery cell 22 can be avoided.

[0054] And / or, the second bracket 212 is formed with a second stop portion 2122, which stops at the other end of the battery cell 22 and forms a second flow gap 2123 between the other end of the battery cell 22 and the second bracket 212, and the second flow gap 2123 is connected between the second diversion hole 2121 and the cooling gap 23.

[0055] Specifically, the second stop portion 2122 has the same function as the first stop portion 2112, and is used to support the battery cell 22. The second bracket 212 is provided with a second stop portion 2122 on a side close to the first bracket 211. In actual design, Figure 6-Figure 8As shown, the structures of the second stop portion 2122 and the first stop portion 2112 can be the same, and the processing is simpler and more convenient. There are also multiple second stop portions 2122, and the multiple second stop portions 2122 are distributed around the second diversion hole 2121 at intervals. The second stop portions 2122 are divided into six groups, and each group includes two second stop portions 2122. During installation, the other end of the battery cell 22 is pressed against the stop notch of the multiple second stop portions 2122 to achieve the connection between the other end of the battery cell 22 and the first bracket 211. The battery cell 22 can be limited circumferentially, and the first bracket 211 and the second bracket 212 reliably connect the battery cell 22, and the connection method is simple and stable. By setting the first stop portion 2112 and the second stop portion 2122 connected to the two ends of the battery cell 22, the contact area between the first bracket 211 and the second bracket 212 and the battery cell 22 can be very small, and the contact area can be less than 10%, which means that the contact area between the battery cell 22 and the coolant is greater than 90%, and the heat dissipation performance is extremely good, and the heat dissipation performance of the battery cell 22 is better.

[0056] like Figure 5 As shown, after the second stop portion 2122 is connected to the battery cell 22, there is a certain gap between the battery cell 22 and the second bracket 212 to form a second flow gap 2123. The second flow gap 2123 connects the cooling gap 23 with the second diverter hole 2121, and there are multiple second flow gaps 2123 around the second diverter hole 2121, so that the coolant in the multiple second flow gaps 2123 can enter the outflow area 15 through the second diverter hole 2121, and the coolant around each battery cell 22 can be collected. The coolant around the battery cell 22 flows smoothly, which can avoid local high heat of the battery cell 22 and has a better heat dissipation effect.

[0057] In some embodiments, the second bracket 212 is provided with a focusing portion 213 , which is located in the cooling gap 23 and protrudes and extends from the second bracket 212 toward the first bracket 211 , and the outer diameter of the focusing portion 213 is configured to gradually decrease in a direction approaching the inlet 12 .

[0058] Specifically, the second bracket 212 is located downstream of the coolant, and the focusing portion 213 is arranged in the cooling gap 23. The focusing portion 213 has the function of concentrating the coolant and can concentrate the coolant in the cooling gap 23. In the specific design, the focusing portion 213 is provided on the side of the second bracket 212 close to the first bracket 211, which can concentrate the coolant from the first bracket 211 to the second bracket 212. In the actual design, the focusing portion 213 can be integrally formed with the second bracket 212, and can also be detachably connected to the second bracket 212 through a connecting piece to ensure the connection strength between the focusing portion 213 and the second bracket 212.

[0059] like Figure 4-Figure 7As shown, the focusing portion 213 can be constructed as a conical structure, and there are multiple focusing portions 213, and the multiple focusing portions 213 are evenly spaced and distributed. The multiple focusing portions 213 all protrude and extend from the second bracket 212 to the first bracket 211, and the outer diameter dimension extending toward the first bracket 211 gradually decreases. In this way, multiple focusing portions 213 can be formed on the periphery of each battery cell 22. After the coolant enters the cooling gap 23, the coolant on the periphery of each battery cell 22 can flow along a stable path, and as the circulation area of ​​the coolant decreases, the flow rate of the coolant gradually increases, quickly taking away the heat of the battery cell 22, and reducing the large temperature difference caused by the early and late contact between the coolant and the front and rear ends of the battery cell 22, so as to effectively balance the temperature difference between the front and rear of the multiple battery cells 22, and achieve better heat dissipation effect. In this way, the battery module 2 is continuously cooled and dissipated, so that the temperature of the battery module 2 can be kept stable to ensure the safe operation of the battery pack 100. Moreover, the flow concentrator 213 has a simple structure and is easy to achieve, which can reduce other complex pipeline arrangements and simplify the overall design.

[0060] Among them, Figure 4 As shown, the focusing portion 213 can be constructed as a focusing structure having at least three arc-shaped surfaces connected to each other, so that the coolant gradually approaching the focusing portion 213 can be better guided, have a better focusing effect, and a faster flow rate.

[0061] In some embodiments, the extension length of the flow concentrator 213 is greater than half of the distance between the first bracket 211 and the second bracket 212, wherein Figure 5 and Figure 6 As shown, the distance between the first bracket 211 and the second bracket 212 is the extension length of the cooling gap 23, that is, the extension length of the focusing portion 213 is at least half of the extension length of the cooling gap 23. For example, the extension length of the focusing portion 213 may be half or two-thirds of the extension length of the coolant gap, etc. The setting method is diverse and can be set according to actual needs.

[0062] Therefore, the extension length of the converging portion 213 is set to be greater than half of the extension length of the cooling gap 23, which can meet the self-strength of the converging portion 213, and will not cause damage to the converging portion 213 due to liquid pressure, thereby increasing the service life of the converging portion 213. In addition, the converging portion 213 can be inserted deeper into the cooling gap 23. When the coolant flows, the longer converging portion 213 can concentrate the coolant earlier, so that the coolant flows along the converging portion 213, and the coolant can be evenly distributed. At the same time, the flow rate of the coolant is increased, and the discharge of the coolant can be accelerated to improve the heat dissipation efficiency of the battery cell 22.

[0063] In some embodiments, the housing 1 further forms an inlet cavity 16 and an outlet cavity 17 . The inlet cavity 16 is connected between the inlet region 14 and the inlet port 12 , and the outlet cavity 17 is connected between the outlet region 15 and the outlet port 13 .

[0064] Specifically, the inlet cavity 16 and the outlet cavity 17 are used for caching the coolant. The inlet end of the inlet cavity 16 is connected to the external coolant structure through the inlet port 12, and the outlet end of the inlet cavity 16 is connected to the inlet region 14. In this way, the external coolant enters the inlet cavity 16 through the inlet port 12 and then enters the inlet region 14, so that the injection of the coolant can be realized. The inlet end of the outlet cavity 17 is connected to the outlet region 15, and the outlet end of the outlet cavity 17 is connected to the external coolant structure through the outlet port 13. The cooling liquid is connected to the external pipeline, so that after absorbing the heat of the battery module 2, it enters the outflow area 15, then enters the outflow cavity 17, and is discharged from the external pipeline through the outlet 13. In this way, a circulation loop of the cooling liquid can be formed, and the outlet end of the inlet cavity 16 and the inlet end of the outflow cavity 17 can be provided with the same connecting hole, so that the structures of the connecting parts of the inlet cavity 16 and the inlet area 14 and the outflow area 15 and the outflow cavity 17 can be the same, which is simple and convenient to process and has lower cost.

[0065] In some embodiments, the inlet cavity 16 and the outlet cavity 17 are respectively located on two sides of the housing 1 away from each other, and the inlet port 12 and the outlet port 13 are open in directions away from each other.

[0066] Specifically, Figure 1-Figure 3 As shown, the shell 1 is constructed as a cubic structure, and the inlet cavity 16 and the outlet cavity 17 are respectively located on opposite sides of the shell 1, and are distributed on two sides of the shell 1 away from each other, wherein the inlet cavity 16 and the outlet cavity 17 are located on the side wall of the shell 1 with a smaller length, and the structures of the inlet cavity 16 and the outlet cavity 17 can be the same, and both extend along the length direction of the battery core 22, and the inlet port 12 of the inlet cavity 16 and the outlet port 13 of the outlet cavity 17 are open in directions away from each other, that is, the opening directions of the inlet port 12 and the outlet port 13 are parallel and opposite, so that the direction in which the coolant flows through the inlet port 12 is the same as the direction in which it flows through the outlet port 13. Compared with the opposite inlet and outflow directions of the coolant, the flow path of the coolant with the same inlet and outflow direction is shorter and the heat dissipation effect is better.

[0067] The inlet cavity 16 and the outlet cavity 17 are arranged on both sides of the shell 1, which helps to structurally isolate the inlet and the outlet and reduce the heat transfer between the inlet and the outlet. The inlet port 12 and the outlet port 13 are opened in directions away from each other to prevent the heated coolant from flowing back to the inlet area 14. In this way, the coolant will not directly contact the same end of the battery cell 22 when entering and leaving, thereby improving the cooling efficiency of the battery cell 22.

[0068] In some embodiments, the cooling gap 23 extends along the first direction, there are multiple battery cells 22, and the multiple battery cells 22 are distributed in multiple columns in the second direction and in multiple rows in the third direction.

[0069] Specifically, the second direction intersects with the third direction and is perpendicular to the first direction. The second direction and the third direction may be perpendicular. The second direction may be a left-right direction, the third direction may be an up-down direction, and the first direction may be a front-back direction. Figure 6 As shown, multiple battery cells 22 extend in the front-to-back direction and are distributed in the left-to-right direction at intervals, that is, multiple battery cells 22 are distributed in multiple columns in the left-to-right direction, and multiple battery cells 22 are distributed in the up-down direction at intervals, that is, multiple battery cells 22 are distributed in multiple rows in the up-down direction. In this way, the distribution of the battery cells 22 can be more compact, and the space can be maximized, and the number of battery cells 22 per unit volume can be increased to store more energy. There are gaps between the multiple battery cells 22, so that the coolant can flow from multiple directions so that the battery cells 22 can dissipate heat more evenly. The battery cells 22 are distributed in multiple rows and columns, so that the battery module 2 has better mechanical stability and reduces structural deformation caused by thermal expansion or other factors. Bus bars are provided between each battery cell 22 to connect the battery cells 22 and collect current. The current is evenly distributed between the battery cells 22 to avoid overheating or damage of some battery cells 22 due to excessive current, thereby improving the overall efficiency of the battery module 2 and making the battery module 2 modular for easy assembly, maintenance and replacement.

[0070] The inlet 12 and the outlet 13 are open in a first direction away from each other, and the flow direction of the coolant is as follows: Figure 1 As shown by the arrows, the coolant flows from the inlet port 12 into the inlet cavity 16 along the first direction, and flows to the inlet region 14 along the second direction, and then flows from the plurality of first diversion holes 2111 along the first direction to the cooling gap 23, and flows from the plurality of second diversion holes 2121 to the outflow region 15, and flows to the outflow cavity 17 along the second direction in the outflow region 15, and finally flows out of the outlet port 13 along the first direction, completing the inflow and outflow of the coolant as a whole. In this way, the overall flow path of the coolant can be reduced, thereby improving the cooling efficiency of the battery cell 22.

[0071] The utility model also provides a vehicle.

[0072] According to the vehicle of the embodiment of the utility model, a battery pack 100 of any one of the above-mentioned embodiments is provided, and a first diverter hole 2111 is provided at one end of the mounting bracket 21 and a second diverter hole 2121 is provided at the other end, so that the coolant can flow along the first diverter hole 2111 to the cooling gap 23, and the coolant can be distributed on the periphery and the end of the battery cell 22, thereby increasing the contact area between the coolant and the battery cell 22, that is, increasing the cooling area, so as to improve the cooling effect of the battery cell 22, and improve the overall performance of the battery pack 100. Among them, the present embodiment is a single battery pack 100, and according to the energy consumption requirements of the whole vehicle, multiple groups of battery packs 100 can be integrated into one, so as to improve the cooling effect of the high-performance integrated battery pack 100, thereby improving the performance of the whole vehicle.

[0073] 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.

[0074] 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 housing having an installation cavity formed therein and provided with an inlet and an outlet communicating with the installation cavity; A battery module, the battery module is mounted in the mounting cavity, the battery module comprises a mounting bracket and a plurality of battery cells mounted on the mounting bracket, and a cooling gap distributed around the battery cells is formed between the battery cells, the mounting bracket and the shell; The mounting bracket is provided with a first diverter hole at one end of the battery core and a second diverter hole at the other end, and the coolant at the inlet is suitable for flowing from the first diverter hole to the cooling gap and then flowing to the outlet after passing through the second diverter hole.

2. The battery pack according to claim 1, characterized in that: The mounting bracket comprises a first bracket and a second bracket, wherein the first bracket and the second bracket are respectively connected to two ends of the battery core; Among them, an inlet flow area is defined between the first bracket and the shell, the first diversion hole is arranged on the first bracket and connected between the inlet flow area and the inlet end of the cooling gap, and an outlet flow area is defined between the second bracket and the shell, the second diversion hole is arranged on the second bracket and connected between the outlet flow area and the outlet end of the cooling gap.

3. The battery pack according to claim 2, characterized in that: The first bracket includes a plurality of the first shunt holes, the second bracket includes a plurality of the second shunt holes, and the plurality of the first shunt holes, the plurality of the second shunt holes, and the plurality of the battery cells are distributed in a one-to-one correspondence.

4. The battery pack according to claim 2, characterized in that: The first bracket is formed with a first stop portion, the first stop portion stops at one end of the battery cell and forms a first flow gap between the one end of the battery cell and the first bracket, and the first flow gap is connected between the first shunt hole and the cooling gap; And / or, the second bracket is formed with a second stop portion, the second stop portion stops at the other end of the battery cell and forms a second current flow gap between the other end of the battery cell and the second bracket, and the second current flow gap is connected between the second shunt hole and the cooling gap.

5. The battery pack according to claim 2, characterized in that: The second bracket is provided with a flow focusing portion, which is located in the cooling gap and protrudes and extends from the second bracket toward the first bracket. The outer diameter of the flow focusing portion is configured to gradually decrease in a direction approaching the inlet.

6. The battery pack according to claim 5, characterized in that: An extension length of the flow concentrating portion is greater than half of a distance between the first bracket and the second bracket.

7. The battery pack according to claim 2, characterized in that: The shell further forms an inlet cavity and an outlet cavity, wherein the inlet cavity is connected between the inlet region and the inlet port, and the outlet cavity is connected between the outlet region and the outlet port.

8. The battery pack according to claim 7, characterized in that: The inlet cavity and the outlet cavity are respectively located on two sides of the shell body away from each other, and the inlet port and the outlet port are open in directions away from each other.

9. The battery pack according to claim 1, characterized in that: The cooling gap extends along the first direction, the battery cells are multiple, and the multiple battery cells are distributed in multiple columns in the second direction and in multiple rows in the third direction.

10. A vehicle, characterized in that: A battery pack according to any one of claims 1 to 9 is provided.

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