Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises: a housing, in which a mounting cavity is formed, the housing is provided with an inflow pipe and an outflow pipe; 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 cooling gaps distributed around the battery cells are formed between the battery cells and the mounting bracket; the baffles are distributed around the battery module and divide the mounting cavity into a flow inlet sub-cavity and a flow outlet sub-cavity, the flow inlet pipe is communicated with the flow inlet sub-cavity, the flow outlet pipe is communicated with the flow outlet sub-cavity, and cooling liquid in the flow inlet sub-cavity is suitable for flowing to the flow outlet sub-cavity from the cooling gap. According to the battery pack disclosed by the utility model, the cooling liquid can be prevented from flowing through the gap between the battery module and the shell, the utilization rate of the cooling liquid is improved, and the circulation path of the cooling liquid can be shortened, so that the cooling efficiency of the battery cells is improved.

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 cold plate cooling cannot meet the heat dissipation needs of vehicle batteries. Very few high-performance vehicles use immersion cooling, but the battery cells that come into contact with the coolant first and the battery cells that come into contact with the coolant last will produce a large temperature difference, resulting in 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 prevent the coolant from flowing through the gap between the battery module and the shell, improve the utilization rate of the coolant, and improve the cooling efficiency of the battery core, and the cooling gap is distributed around the periphery of the battery core, increasing the contact area between the coolant and the battery core, and the cooling effect is better.

[0005] A battery pack according to an embodiment of the utility model includes: a shell having an installation cavity formed therein, and the shell having an inlet pipe and an outlet pipe installed therein; a battery module, the battery module being installed in the installation cavity, the battery module including a mounting bracket and a plurality of battery cells mounted on the mounting bracket, a cooling gap distributed around the battery cells being formed between the battery cells and the mounting bracket; a baffle, the baffle being distributed around the battery module and dividing the installation cavity into an inlet sub-cavity and an outlet sub-cavity, the inlet pipe being connected to the inlet sub-cavity, the outlet pipe being connected to the outlet sub-cavity, and the cooling liquid in the inlet sub-cavity is suitable for flowing from the cooling gap to the outlet sub-cavity.

[0006] According to the battery pack of the embodiment of the utility model, the installation cavity is divided into an inlet sub-cavity and an outlet sub-cavity by arranging a baffle, so that the cooling liquid in the inlet sub-cavity can flow from the cooling gap of the battery module to the outlet sub-cavity, which can prevent the cooling liquid from flowing through the gap between the battery module and the shell, thereby improving the utilization rate of the cooling liquid and shortening the flow path of the cooling liquid to improve the cooling efficiency of the battery cell. The cooling gap is distributed around the periphery of the battery cell to increase the contact area between the cooling liquid and the battery cell, thereby achieving a better cooling effect.

[0007] According to the battery pack of some embodiments of the utility model, the battery modules are divided into two groups, and the two groups of battery modules are spaced apart and distributed in the installation cavity along a first direction, and the cooling gap is conductive along the first direction;

[0008] Wherein, each of the battery modules is provided with a baffle plate outside, a common inlet sub-cavity is formed between the two baffle plates, and the outlet sub-cavity is formed in the areas where the two baffle plates are away from each other.

[0009] According to the battery pack of some embodiments of the present invention, the inlet pipe is located between the two battery modules, and the inlet pipe penetrates the inlet sub-cavity along the second direction, and the inlet pipe is provided with a flow hole connected to the inlet sub-cavity, and the second direction intersects with the first direction.

[0010] According to the battery pack of some embodiments of the present invention, a plurality of the battery cells are spaced apart and distributed on the mounting bracket along the second direction;

[0011] There are a plurality of flow holes, and the plurality of flow holes are distributed at intervals along the second direction.

[0012] According to the battery pack of some embodiments of the utility model, both ends of the inlet pipe are formed with inlet ports;

[0013] And / or, the flow holes are provided on the sides of the flow inlet pipe facing the two battery modules.

[0014] According to the battery pack of some embodiments of the present invention, the plurality of battery cells are spaced apart along the second direction and distributed in a plurality of columns, and the plurality of battery cells are spaced apart along the third direction and distributed in a plurality of rows;

[0015] The second direction intersects with the third direction, and both are perpendicular to the first direction.

[0016] According to the battery pack of some embodiments of the present invention, the mounting bracket includes a first bracket, a second bracket and a sealing plate, the first bracket and the second bracket are respectively connected to two ends of the battery cell, and the sealing plate is connected between the first bracket and the second bracket and is arranged around the plurality of battery cells.

[0017] According to the battery pack of some embodiments of the present invention, the second bracket is provided with a flow converging portion, and the flow converging portion protrudes and extends from the second bracket toward the first bracket, and the outer diameter of the flow converging portion is configured to gradually decrease in a direction approaching the first bracket.

[0018] According to the battery pack of some embodiments of the present invention, the first bracket includes a plurality of first shunt holes, the second bracket includes a plurality of second shunt holes, the plurality of first shunt holes, the plurality of second shunt holes and the plurality of battery cells are distributed in one-to-one correspondence, the first shunt holes are connected between the cooling gap and the inlet sub-cavity, and the second shunt holes are connected between the cooling gap and the outlet sub-cavity.

[0019] The utility model also provides a vehicle.

[0020] A vehicle according to an embodiment of the utility model is provided with a battery pack according to any one of the above embodiments.

[0021] The advantages of the vehicle and the above-mentioned battery pack over the prior art are the same and will not be elaborated here.

[0022] 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

[0023] 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:

[0024] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0025] Figure 2 is a cross-section of a battery pack according to an embodiment of the utility model Figure 1 ;

[0026] Figure 3 is a cross-section of a battery pack according to an embodiment of the utility model Figure 2 ;

[0027] Figure 4 is a cross-section of a battery pack according to an embodiment of the utility model Figure 3 ;

[0028] Figure 5 is a schematic structural diagram of an inlet pipe of a battery pack according to an embodiment of the utility model;

[0029] Figure 6 is a schematic structural diagram of a baffle of a battery pack according to an embodiment of the utility model;

[0030] Figure 7 is an exploded view of a battery pack according to an embodiment of the utility model;

[0031] Figure 8 It is a partial schematic diagram of a mounting bracket of a battery pack according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] Battery pack 100,

[0034] Shell 1, mounting cavity 11, inlet sub-cavity 111, outlet sub-cavity 112, inlet pipe 12, flow hole 121, inlet port 122, outlet pipe 13, upper cover 14, first side wall 141, second side wall 142, mounting groove 143, lower shell 15, battery module 2, mounting bracket 21, first bracket 211, first diverter hole 2111, first stop portion 2112, first flow gap 2113, second bracket 212, second diverter hole 2121, second stop portion 2122, second flow gap 2123, focusing portion 213, sealing plate 214, battery cell 22, cooling gap 23, baffle 3, protrusion 31. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Reference below Figure 1-Figure 8 Describe the battery pack 100 according to an embodiment of the utility model. By arranging the baffle 3 distributed around the battery module 2, the installation cavity 11 can be divided into an inlet sub-cavity 111 and an outlet sub-cavity 112. The coolant in the inlet sub-cavity 111 can flow from the cooling gap 23 of the battery module 2 to the outlet sub-cavity 112, and the coolant can be prevented from flowing through the gap between the battery module 2 and the shell 1, thereby improving the utilization rate of the coolant and improving the cooling efficiency of the battery cell 22.

[0039] like Figure 1-Figure 8 As shown, a battery pack 100 according to an embodiment of the present invention includes: a housing 1, a battery module 2 and a baffle 3.

[0040] An installation cavity 11 is formed in the shell 1, and an inlet pipe 12 and an outlet pipe 13 are installed 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, an installation cavity 11 is formed in the shell 1, and the installation cavity 11 has the same shape as the shell 1, which can provide a larger space for the installation of other structures, and the inlet pipe 12 and the outlet pipe 13 are detachably connected to the shell 1, so that the coolant can be passed into the shell 1 through the inlet pipe 12, and after the internal structure of the shell 1 is cooled and dissipated, the coolant flows out of the shell 1 from the outlet pipe 13.

[0041] 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 installed on the mounting bracket 21, specifically, the battery module 2 is a collection of battery cell 22 units, wherein a cavity is formed in the mounting bracket 21 for realizing the connection of the plurality of battery cells 22, integrating the plurality of battery cells 22 into one, and providing the required voltage and current.

[0042] A cooling gap 23 is formed between the battery cell 22 and the mounting bracket 21 and is distributed around the battery cell 22. 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, thereby increasing the contact area between the coolant and the battery cell 22, thereby improving the cooling effect of the battery cell 22.

[0043] The baffle 3 is distributed around the battery module 2 and divides the installation cavity 11 into an inlet sub-cavity 111 and an outlet sub-cavity 112, that is, the inlet sub-cavity 111 and the outlet sub-cavity 112 are separated by the baffle 3, that is, the inlet sub-cavity 111 is not directly connected to the outlet sub-cavity 112, the inlet pipe 12 is connected to the inlet sub-cavity 111, the outlet pipe 13 is connected to the outlet sub-cavity 112, and the coolant in the inlet sub-cavity 111 is suitable for flowing from the cooling gap 23 to the outlet sub-cavity 112, that is, the inlet sub-cavity 111 and the outlet sub-cavity 112 are connected through the cooling gap 23, so that the coolant in the inlet sub-cavity 111 flows to the cooling gap 23, and then flows to the outlet sub-cavity 112 after absorbing heat in the cooling gap 23, thereby realizing heat dissipation of the battery cell 22.

[0044] Specifically, Figure 6 As shown, the baffle 3 can be constructed in a ring shape or a frame shape, and the baffle 3 can be sleeved on the outer periphery of the battery module 2, and the baffle 3 is pressed against the shell 1 on the side away from the battery module 2, so that the battery module 2 and the shell 1 can be relatively fixed, and the inlet sub-cavity 111 and the outlet sub-cavity 112 of the installation cavity 11 can be separated, and the inlet sub-cavity 111 is located in the coolant inlet area of ​​the battery module 2, and the outlet sub-cavity 112 is located in the coolant outlet area of ​​the battery module 2, the inlet pipe 12 is connected with the inlet sub-cavity 111, the outlet pipe 13 is connected with the outlet sub-cavity 112, and a cooling gap 23 is provided in the battery module 2, so that in the liquid flow direction, the inlet pipe 12, the inlet sub-cavity 111, the cooling gap 23, the outlet sub-cavity 112 and the outlet pipe 13 are connected in sequence.

[0045] Therefore, when the battery module 2 is working, heat is generated. At this time, the coolant flows from the inlet pipe 12 into the inlet sub-cavity 111, and then enters the cooling gap 23. After absorbing the heat of the battery cell 22, the coolant enters the outlet sub-cavity 112, and finally flows out from the outlet pipe 13. In this way, the battery module 2 is continuously cooled and dissipated, and the temperature of the battery module 2 can be kept stable to ensure the safe operation of the battery pack 100. And through the blocking effect of the baffle 3, the coolant in the inlet sub-cavity 111 can only flow through the inside of the battery module 2, so that more coolant fills the cooling gap 23, improves the heat dissipation effect of the coolant, and makes the temperature around the battery cell 22 more uniform. And the baffle 3 is set to make a gap between the battery module 2 and the shell 1, which can reduce the heat of the battery module 2 from diffusing toward the shell 1 and reduce the temperature of the shell 1.

[0046] According to the battery pack 100 of the embodiment of the utility model, the installation cavity 11 is divided into an inlet sub-cavity 111 and an outlet sub-cavity 112 by setting a baffle 3, so that the coolant in the inlet sub-cavity 111 can flow from the cooling gap 23 of the battery module 2 to the outlet sub-cavity 112, which can prevent the coolant from flowing through the gap between the battery module 2 and the shell 1, thereby improving the utilization rate of the coolant and shortening the flow path of the coolant to improve the cooling efficiency of the battery cell 22, and the cooling gap 23 is distributed around the periphery of the battery cell 22 to increase the contact area between the coolant and the battery cell 22, thereby achieving a better cooling effect.

[0047] In some embodiments, there are two groups of battery modules 2 , and the two groups of battery modules 2 are spaced apart and distributed in the installation cavity 11 along the first direction, and the cooling gap 23 is conductive along the first direction.

[0048] Specifically, the first direction may be a horizontal direction or a vertical direction. In the present embodiment, the first direction is a horizontal direction and may be set as a front-to-back direction. Two groups of battery modules 2 are located in the mounting cavity 11, and the two groups of battery modules 2 are spaced apart and distributed along the front-to-back direction, so that the space of the mounting cavity 11 can be effectively utilized. The spacing can prevent direct contact between the battery modules 2, thereby reducing the risk of short circuit or thermal runaway. The spaced apart gaps can provide flow space for the coolant of the battery modules 2, and the cooling gaps 23 of the two battery modules 2 are both connected along the front-to-back direction, so that the coolant can flow along the front-to-back direction, thereby ensuring that the coolant flows evenly through the multiple battery cells 22 in each battery module 2, thereby achieving uniform cooling.

[0049] A baffle plate 3 is disposed outside each battery module 2 , a common inlet sub-cavity 111 is formed between the two baffle plates 3 , and an outlet sub-cavity 112 is formed in the areas where the two baffle plates 3 are facing away from each other.

[0050] Specifically, Figure 2 As shown, the two battery modules 2 are both sleeved with baffles 3, and the two baffles 3 can be located in the middle of the battery module 2 in the first direction. An inlet sub-cavity 111 can be formed between the two baffles 3. The two battery modules 2 share one inlet sub-cavity 111, and outlet sub-cavities 112 are respectively formed on the sides of the two baffles 3 away from each other, that is, two outlet sub-cavities 112 are formed, and the two outlet sub-cavities 112 are respectively used for discharging the coolant of the two battery modules 2, as shown in FIG. Figure 2 As shown, the inlet sub-cavity 111 is located in the middle area of ​​the installation cavity 11, and the two outlet sub-cavities 112 are located on both sides of the installation cavity 11, and the two outlet sub-cavities 112 are respectively connected to the two outlet pipes 13, that is, the coolant flows from the middle of the installation cavity 11 along the first direction and in opposite directions, which can cool the two groups of battery modules 2 at the same time, improve the cooling efficiency of the two groups of battery modules 2, and the overall structure is symmetrically distributed along the first direction, which is convenient for installation and maintenance.

[0051] Among them, Figure 7 As shown, the periphery of the mounting bracket 21 is a protrusion and groove structure, and the structure of the mounting bracket 21 matches the multiple battery cells 22, so that the gaps of the cooling channels 23 formed between the mounting bracket 21 and the battery cells 22 can be the same, so that the coolant can be more evenly distributed on the periphery of the battery cells 22, so that each battery cell 22 can be cooled more evenly and the cooling effect can be better. Figure 6 As shown, the connection between the baffle 3 and the mounting bracket 21 is arranged in a conformal manner, that is, the baffle 3 is provided with a protrusion 31 matching the mounting bracket 21 on the side close to the mounting bracket 21, so that the connection between the baffle 3 and the mounting bracket 21 can be more reliable and better sealed, and the coolant can be prevented from flowing between the two and failing to cool the battery cells 22 in the mounting bracket 21 well.

[0052] In some embodiments, the inlet pipe 12 is located between two battery modules 2, and the inlet pipe 12 passes through the inlet sub-cavity 111 along the second direction. The inlet pipe 12 is provided with a flow hole 121 connected to the inlet sub-cavity 111, and the second direction intersects with the first direction.

[0053] Specifically, the second direction can be perpendicular to the first direction, the second direction can be a horizontal direction, and the second direction can be set as a left-right direction. The space between the two battery modules 2 is used to install the inlet pipe 12, and the inlet pipe 12 extends in the left-right direction and passes through the inlet sub-cavity 111, that is, the direction of the inlet pipe 12 is perpendicular to the arrangement of the two battery modules 2, wherein the inlet pipe 12 is provided with a flow hole 121, and the flow hole 121 passes through the inlet pipe 12 along the first direction, and the inlet pipe 12 can be connected with the inlet sub-cavity 111 through the flow hole 121, that is, the coolant flows in the inlet pipe 12 along the second direction, and flows into the inlet sub-cavity 111 through the flow hole 121 to realize the injection of the coolant.

[0054] Therefore, the inlet pipe 12 is arranged between the two battery modules 2, so that the coolant introduced by the inlet pipe 12 can directly cool the two battery modules 2, and the inlet pipe 12 passes through the inlet sub-cavity 111 along the second direction, which means that the inlet pipe 12 passes from one end of the inlet sub-cavity 111 to the other end, which helps to realize the flow of the coolant in the entire inlet sub-cavity 111, shorten the flow path of the coolant, and improve the cooling effect.

[0055] In some embodiments, multiple battery cells 22 are distributed on the mounting bracket 21 at intervals along the second direction. For example, multiple battery cells 22 can be evenly distributed on the mounting bracket 21 at intervals along the front-to-back direction. The mounting bracket 21 wraps and fixes the multiple battery cells 22. Connecting holes are provided only toward the inlet sub-cavity 111 and the outlet sub-cavity 112. The cooling flow channel in the mounting bracket 21 can be connected with the inlet sub-cavity 111 through the connecting holes. There are multiple connecting holes, and the multiple connecting holes are distributed at intervals along the second direction. The multiple connecting holes correspond to the multiple battery cells 22 one by one, respectively, so that the coolant can cool each battery cell 22 and improve the cooling uniformity.

[0056] There are multiple flow holes 121, and the multiple flow holes 121 are spaced apart and distributed along the second direction. For example, the flow holes 121 can be configured as round holes, strip holes, etc. Figure 5 As shown, a plurality of flow holes 121 are distributed at intervals along the front-to-back direction, that is, they are evenly distributed at intervals along the length direction of the inlet pipe 12, and a plurality of battery cells 22 are distributed at intervals along the front-to-back direction, that is, the arrangement of the flow holes 121 and the plurality of battery cells 22 is the same, and the distribution of coolant in battery cells 22 at different positions can be controlled. In this way, the coolant in the inlet pipe 12 can flow to the inlet sub-cavity 111 through the plurality of flow holes 121, and the coolant in the inlet sub-cavity 111 enters into the plurality of cooling channels between the plurality of battery cells 22 and the mounting bracket 21 through the plurality of connecting holes, which can ensure that the coolant is distributed more evenly to each battery cell 22, avoiding insufficient cooling of some battery cells 22 and overcooling of other battery cells 22, thereby more effectively transferring heat, improving the overall cooling efficiency and cooling uniformity, and ensuring that the battery cells 22 operate within a certain temperature range, thereby improving the overall safety.

[0057] In some embodiments, inlet ports 122 are formed at both ends of the inlet pipe 12, that is, both ends of the inlet pipe 12 are used for the inflow of coolant, such as the coolant can flow in from the inlet port 122 at either end of the inlet pipe 12, or can flow in from the inlet ports 122 at both ends of the inlet pipe 12, thereby improving the flexibility of the coolant entering the battery pack 100, and the coolant flows in from the inlet ports 122 at both ends of the inlet pipe 12, which can increase the injection speed of the coolant, and the coolant can quickly fill the inlet sub-cavity 111 from both ends of the inlet pipe 12, and the coolant can quickly enter the battery module 2, thereby increasing the flow rate of the coolant, so as to improve the cooling efficiency of the coolant on the battery cell 22, and the coolant enters from both ends of the inlet pipe 12, which can reduce the pressure loss of the coolant in the inlet pipe 12 to a certain extent.

[0058] And / or, the sides of the inlet pipe 12 facing the two battery modules 2 are provided with flow holes 121, so that the coolant can be introduced into the inlet sub-cavity 111 through the flow holes 121 on both sides of the inlet pipe 12 at the same time. For example, the inlet pipe 12 is provided with flow holes 121 on both sides in the first direction, and the flow holes 121 on both sides of the inlet pipe 12 are arranged opposite to each other. In this way, the coolant in the inlet pipe 12 can flow from the flow holes 121 on both sides to the two groups of battery modules 2 respectively, which can reduce the flow path of the coolant to the battery modules 2 on both sides, increase the flow rate of the coolant, and enable the coolant to cool the two groups of battery modules 2 at the same time, thereby ensuring that the temperatures of the two groups of battery modules 2 are consistent, and thus keeping the whole within a certain temperature range.

[0059] Therefore, by setting the inlet flow at both ends of the inlet pipe 12 and setting the flow holes 121 on both sides of the inlet pipe 12, the cooling efficiency of the two groups of battery modules 2 can be effectively improved, thereby ensuring the overall temperature uniformity of the battery pack 100, improving the reliability of the battery pack 100, and the structure is simple and the setting is reasonable.

[0060] In some embodiments, the plurality of battery cells 22 are spaced apart and distributed in multiple columns along the second direction, and the plurality of battery cells 22 are spaced apart and distributed in multiple rows along the third direction, wherein the second direction intersects with the third direction and both are perpendicular to the first direction.

[0061] Specifically, the second direction and the third direction may be perpendicular, the second direction may be a left-right direction, and the third direction may be an up-down direction, such as Figure 7 As shown, multiple battery cells 22 are spaced apart and distributed along the left-right direction, that is, multiple battery cells 22 are distributed in multiple columns in the left-right direction, and multiple battery cells 22 are spaced apart and distributed along the up-down direction, that is, multiple battery cells 22 are distributed in multiple rows in the up-down direction. In this way, the battery cells 22 can be distributed more compactly and the space can be utilized to the maximum extent, and the number of battery cells 22 per unit volume can be increased to store more energy. Moreover, 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. Moreover, the battery cells 22 are distributed in multiple rows and columns, so that the battery module 2 has better mechanical stability, reduces structural deformation caused by thermal expansion or other factors, optimizes the electrical connection between the battery cells 22, improves the overall efficiency of the battery module 2, and makes the battery module 2 modular, which is convenient for assembly, maintenance and replacement.

[0062] In some embodiments, the mounting bracket 21 includes a first bracket 211, a second bracket 212 and a sealing plate 214. 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 2 and Figure 8As 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.

[0063] Among them, Figure 2 As shown, the sealing plate 214 is connected between the first bracket 211 and the second bracket 212. The sealing plate 214 and the first bracket 211 and the second bracket 212 can be welded into an integral structure, and the sealing plate 214 is arranged around the multiple battery cells 22, that is, the sealing plate 214 is distributed along the periphery of multiple rows and columns of battery cells 22, so that the four sides of the multiple battery cells 22 can be closed, and multiple cooling gaps 23 distributed around the battery cells 22 can be formed between the first bracket 211, the second bracket 212, the sealing plate 213 and the battery cells 22.

[0064] In some embodiments, the flow concentrator 213 is disposed on the second bracket 212 , and the flow concentrator 213 protrudes and extends from the second bracket 212 toward the first bracket 211 , and the outer diameter of the flow concentrator 213 is configured to gradually decrease in a direction approaching the first bracket 211 .

[0065] Specifically, the second bracket 212 is located downstream of the coolant, and a flow concentrator 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 actual design, the flow concentrator 213 can be integrally formed with the second bracket 212, or can be detachably connected to the second bracket 212 through a connector, so as to ensure the connection strength between the flow concentrator 213 and the second bracket 212. Figure 2-Figure 4 and Figure 8 As shown, there are multiple converging parts 213, and the multiple converging parts 213 are evenly spaced and distributed. The multiple converging parts 213 all protrude and extend from the second bracket 212 to the first bracket 211, and the outer diameter extending toward the first bracket 211 gradually decreases. In this way, multiple converging parts 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. In this way, 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 can be reduced, 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 addition, the structure of the converging part 213 is simple, which can reduce other complex pipeline settings and simplify the overall design.

[0066] The focusing portion 213 may be constructed as a focusing structure having at least three connected arc-shaped surfaces, so that the coolant gradually approaching the focusing portion 213 can be better guided, have a better focusing effect, and flow faster.

[0067] 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 2 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.

[0068] 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.

[0069] 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, the plurality of first diversion holes 2111, the plurality of second diversion holes 2121 and the plurality of battery cells 22 are distributed one-to-one, the first diversion holes 2111 are connected between the cooling gap 23 and the inlet sub-cavity 111, and the second diversion holes 2121 are connected between the cooling gap 23 and the outlet sub-cavity 112.

[0070] Specifically, the first diversion hole 2111 and the second diversion hole 2121 are used to evenly divert the coolant. Figure 2 and Figure 8As 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, elliptical holes, etc. The plurality of first diverter holes 2111 and the plurality of second diverter holes 2121 are distributed opposite to each other and are respectively distributed corresponding to each battery cell 22. The first diverter holes 2111 connect the inlet sub-cavity 111 with the cooling gap 23, and the second diverter holes 2121 connect the cooling gap 23 with the outlet sub-cavity 112. In this way, the coolant in the inlet sub-cavity 111 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 sub-cavity 112, thereby realizing the flow of the coolant and the heat dissipation of the coolant to the battery cells 22.

[0071] Therefore, through a one-to-one corresponding setting, multiple first diversion holes 2111 can introduce the coolant from the end of each battery cell 22 into the cooling gap 23, 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, avoiding local high heat at the bottom and periphery of the battery cell 22, achieving a more uniform cooling effect, and preventing the coolant from being unevenly distributed in the mounting bracket 21, thereby ensuring that all battery cells 22 can be properly cooled, improving the working stability of the battery cell 22, and ensuring the optimal performance and longest life of the battery cell 22.

[0072] 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.

[0073] 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 8As 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.

[0074] like Figure 8 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.

[0075] 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.

[0076] 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 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.

[0077] like Figure 8 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 outlet sub-cavity 112 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.

[0078] In some embodiments, the housing 1 includes two first side walls 141 that are spaced apart and distributed opposite to each other along a first direction. Each of the two first side walls 141 is provided with an outlet pipe 13 , and the outlet pipe 13 is located in a middle area of ​​the first side wall 141 .

[0079] Specifically, the two first side walls 141 are spaced apart and distributed along the first direction, and the two first side walls 141 correspond to the two battery modules 2 respectively, and the middle regions of the two first side walls 141 are respectively provided with connection holes for installing the outflow pipe 13, so that the outflow pipe 13 can be located in the middle region of the first side wall 141, and the space between the battery module 2 and the first side wall 141 is the outflow sub-cavity 112, so that the coolant flowing into the outflow sub-cavity 112 from different positions of the battery module 2 can flow out from the middle outflow pipe 13, so that the flow from the battery module 2 to the outflow pipe 13 can be reasonable, and the pressure loss can be reduced, so that the coolant can flow out quickly after absorbing heat, improve the heat dissipation efficiency of the battery module 2, and help reduce the retention of the coolant in the housing 1, and avoid local overheating. Its reasonable arrangement helps to effectively manage the heat of the battery module 2 or the component, maintain it at the optimal working temperature, and enable the coolant management to be performed independently on both sides, which is convenient for modular design and maintenance.

[0080] And / or, the shell 1 includes two second side walls 142 spaced apart and relatively distributed along the second direction, both ends of the inlet pipe 12 respectively extend to and penetrate the two second side walls 142 , and the end of the inlet pipe 12 is located in the middle area of ​​the second side wall 142 .

[0081] Specifically, the two second side walls 142 are spaced apart and distributed along the second direction, and the two second side walls 142 correspond to the two battery modules 2 at the same time, and the middle regions of the two second side walls 142 are respectively provided with connection holes for penetrating the inlet pipe 12, so that the inlet pipe 12 can be located in the middle region of the first side wall 141, so that the coolant in the inlet pipe 12 flows into the inlet sub-cavity 111 from the middle region, and flows from the middle to the upper and lower sides, so as to flow into the cooling channel inside the battery module 2 from different positions outside the battery module 2, so that the flow of the coolant from the inlet pipe 12 to the cooling channel can be reasonable, and the pressure loss can be reduced, so that the coolant can flow more evenly to each cooling channel, and the flow rate of the coolant can be increased, and the heat dissipation efficiency of the battery module 2 can be improved, and it is helpful to reduce the retention of the coolant in the inlet sub-cavity 111 and avoid local overheating. Its reasonable arrangement is helpful to effectively manage the heat of the battery module 2 or the component and maintain it at the optimal working temperature.

[0082] In some embodiments, the first direction is along the width direction of the housing 1, and the second direction is along the length direction of the housing 1. Figure 1-Figure 4As shown, two first side walls 141 are spaced apart and distributed along the width direction of the shell 1, and two second side walls 142 are spaced apart and distributed along the length direction of the shell 1, and the length of the two first side walls 141 is greater than the length of the two second side walls 142, and two groups of battery modules 2 are spaced apart and distributed along the width direction of the shell 1, and the inlet pipe 12 is arranged along the length direction of the shell 1, and the two outlet pipes 13 are installed along the width direction of the shell 1. In this way, the overall structure is simpler and clearer. In this way, the coolant flows into the shell 1 along the length direction of the shell 1, and flows to the two groups of battery modules 2 respectively along the width direction of the shell 1, and flows out from the two groups of battery modules 2 respectively, which can reduce the flow path of the coolant in the battery module 2, thereby improving the heat dissipation efficiency of the battery module 2, and maximizing the performance of the battery pack 100. In addition, the overall structure is compact, the size is small, and the coolant is less, which can better control the weight and meet the lightweight setting requirements of the vehicle.

[0083] In some embodiments, the housing 1 includes an upper cover 14 and a lower shell 15 . The upper cover 14 is formed with a mounting groove 143 open downward. The lower shell 15 is connected to the lower end of the upper cover 14 and is used to close the bottom of the mounting groove 143 to jointly define the mounting cavity 11 .

[0084] Specifically, Figure 7 As shown, the upper cover 14 can be constructed as a box-shaped structure, and the lower shell 15 can be constructed as a flat plate structure. The upper cover 14 is formed with a mounting groove 143 that opens downwards. The lower shell 15 is located at the lower end of the upper cover 14 and can close the mounting groove 143. In this way, the upper cover 14 and the lower shell 15 can jointly define the mounting cavity 11. During installation, the battery module 2 and other structures are installed on the upper part of the lower shell 15, and then the upper cover 14 is fitted and connected to the upper part of the upper cover 14. The two can be detachably connected by connecting bolts, or can be connected by hinges, so that the installation of the battery pack 100 can be realized. The connection method is simple and easy to disassemble and assemble. The connection between the upper cover 14 and the lower shell 15 has good sealing performance, which can provide protection for the internal structure of the shell 1 and improve the structural performance of the battery pack 100. The mounting groove 143 of the upper cover 14 is open downwards, so that the internal components cannot be seen from the outside, and the appearance of the shell 1 is kept neat.

[0085] The inlet pipe 12 and the outlet pipe 13 are installed on the upper cover 14 at intervals, that is, the inlet pipe 12 and the outlet pipe 13 are both installed on the upper cover 14, so that the inlet and outlet points of the coolant are both located at the upper part of the shell 1, which is helpful to realize the flow and distribution of the coolant in the shell 1. Figure 1 As shown, the inlet pipe 12 and the outlet pipe 13 are spaced apart and distributed on different side walls of the upper cover 14, so that the coolant can flow in and out from different side walls of the upper cover 14. The inlet path and the outlet path of the coolant are spaced apart and distributed, and the two paths do not overlap. The arrangement is reasonable, and the cooling paths of the two groups of battery modules 2 can be controlled separately, which can improve the heat dissipation efficiency of the coolant on the battery module 2.

[0086] The utility model also provides a vehicle.

[0087] 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. The installation cavity 11 is divided into an inlet sub-cavity 111 and an outlet sub-cavity 112 by arranging a baffle 3, so that the coolant in the inlet sub-cavity 111 can flow from the cooling gap 23 of the battery module 2 to the outlet sub-cavity 112, and the coolant can be prevented from flowing through the gap between the battery module 2 and the shell 1, thereby improving the utilization rate of the coolant and improving the cooling efficiency of the battery cell 22. The cooling gap 23 is distributed around the periphery of the battery cell 22, thereby increasing the contact area between the coolant and the battery cell 22, resulting in a better cooling effect, which can improve the overall performance of the battery pack 100, thereby improving the performance of the entire vehicle.

[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 housing, wherein a mounting cavity is formed in the housing, and an inlet pipe and an outlet pipe are mounted on the housing; A battery module, the battery module is installed in the installation cavity, the battery module comprises a mounting bracket and a plurality of battery cells installed on the mounting bracket, and a cooling gap distributed around the battery cells is formed between the battery cells and the mounting bracket; A baffle is distributed around the battery module and divides the installation cavity into an inlet sub-cavity and an outlet sub-cavity, the inlet pipe is connected to the inlet sub-cavity, the outlet pipe is connected to the outlet sub-cavity, and the coolant in the inlet sub-cavity is suitable for flowing from the cooling gap to the outlet sub-cavity.

2. The battery pack according to claim 1, characterized in that: The battery modules are divided into two groups, and the two groups of battery modules are spaced apart and distributed in the installation cavity along a first direction, and the cooling gap is conductive along the first direction; Wherein, each of the battery modules is provided with a baffle plate outside, a common inlet sub-cavity is formed between the two baffle plates, and the outlet sub-cavity is formed in the areas where the two baffle plates are away from each other.

3. The battery pack according to claim 2, characterized in that: The inlet pipe is located between the two battery modules, and the inlet pipe penetrates the inlet sub-cavity along a second direction. The inlet pipe is provided with a flow hole communicating with the inlet sub-cavity, and the second direction intersects with the first direction.

4. The battery pack according to claim 3, characterized in that: The plurality of battery cells are spaced apart and distributed on the mounting bracket along the second direction; There are a plurality of flow holes, and the plurality of flow holes are distributed at intervals along the second direction.

5. The battery pack according to claim 3, characterized in that: Both ends of the inlet pipe are formed with inlet ports; And / or, the flow holes are provided on the sides of the flow inlet pipe facing the two battery modules.

6. The battery pack according to claim 3, characterized in that: The plurality of battery cells are spaced apart and distributed in a plurality of columns along the second direction, and the plurality of battery cells are spaced apart and distributed in a plurality of rows along the third direction; The second direction intersects with the third direction, and both are perpendicular to the first direction.

7. The battery pack according to claim 1, characterized in that: The mounting bracket includes a first bracket, a second bracket and a sealing plate, the first bracket and the second bracket are respectively connected to two ends of the battery core, and the sealing plate is connected between the first bracket and the second bracket and is arranged around the plurality of battery cores.

8. The battery pack according to claim 7, characterized in that: The second bracket is provided with a flow converging portion, and the flow converging portion protrudes and extends from the second bracket toward the first bracket, and the outer diameter of the flow converging portion is configured to gradually decrease in a direction approaching the first bracket.

9. The battery pack according to claim 7, characterized in that: The first bracket includes a plurality of first diverter holes, and the second bracket includes a plurality of second diverter holes. The plurality of first diverter holes, the plurality of second diverter holes and the plurality of battery cells are distributed in one-to-one correspondence. The first diverter holes are connected between the cooling gap and the inlet sub-cavity, and the second diverter holes are connected between the cooling gap and the outlet sub-cavity.

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

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