Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, and the battery pack comprises a bottom tray which is provided with an accommodating space which is opened upwards; the liquid cooling plate is arranged in the accommodating space and is supported on the bottom tray, the plurality of battery cells are arranged above the liquid cooling plate, and each battery cell is connected with the liquid cooling plate. According to the battery pack disclosed by the embodiment of the utility model, the bottom tray is arranged to accommodate and support other parts in the battery pack, the plurality of battery cells are arranged to improve the energy density of the battery pack and improve the cruising ability of a vehicle, and meanwhile, the liquid cooling plate is arranged between the battery cells and the bottom tray to cool the battery cells, so that the battery pack is more energy-saving and environment-friendly. And the plurality of battery cells are connected with the liquid cooling plate, so that the reliability of cooling the battery cells by using the liquid cooling plate can be improved, the connection strength between the battery cells and the liquid cooling plate can be improved, and the overall structural strength of the battery pack can be improved.

Description

Technical Field

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

[0002] Traditional lithium-ion power battery packs generally consist of multiple cells assembled into modules and then placed in a box for fixation. The advantage of this structure is that the module has good formability and the whole package has good manufacturing processability, but the disadvantages are also obvious. Modular batteries require more structural parts to be grouped, such as short plates, side plates, straps, etc. These structural parts occupy a large part of the weight and space in the energy zone, reducing the energy density of the battery pack, and there is room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery pack, which can improve the energy density of the battery pack, reduce the possibility of thermal runaway of the battery cell, and help improve the overall structural strength of the battery pack.

[0004] According to the battery pack of the embodiment of the utility model, it includes: a bottom tray, the bottom tray is formed with a storage space open upward; a liquid cooling plate and a plurality of battery cells, the liquid cooling plate is installed in the storage space and supported by the bottom tray, the plurality of battery cells are installed above the liquid cooling plate, and each of the battery cells is connected to the liquid cooling plate respectively.

[0005] According to the battery pack of the embodiment of the utility model, a bottom tray is provided to accommodate and support other components in the battery pack, and multiple battery cells are provided to improve the energy density of the battery pack and the endurance of the vehicle. At the same time, a liquid cooling plate is provided between the battery cell and the bottom tray to cool the battery cell and reduce the possibility of thermal runaway of the battery cell. In addition, multiple battery cells are connected to the liquid cooling plate to improve the reliability of cooling the battery cell by the liquid cooling plate and improve the connection strength between the two, which is beneficial to improving the overall structural strength of the battery pack.

[0006] According to the battery pack of some embodiments of the present invention, the bottom wall of the bottom tray is further provided with a supporting rib protruding upward, the liquid cooling plate is provided with a first avoidance groove, and the supporting rib passes through the first avoidance groove and is supported on the bottom of the battery cell.

[0007] According to the battery pack of some embodiments of the present invention, there are multiple supporting ribs, and the multiple supporting ribs are distributed in parallel and spaced apart, and both ends of each of the battery cells are respectively supported by two adjacent supporting ribs.

[0008] According to the battery pack of some embodiments of the utility model, the battery cells are distributed in multiple groups along the first direction within the accommodating space, and each group includes multiple battery cells distributed in sequence along the second direction, and the first direction is perpendicular to the second direction; multiple supporting ribs are spaced apart in parallel along the first direction, and each supporting rib is extended along the second direction, and the multiple battery cells in each group are supported by the same supporting rib.

[0009] According to the battery pack of some embodiments of the present invention, the upper surface of the supporting rib is flush with the upper surface of the liquid cooling plate, and the supporting rib and the liquid cooling plate are respectively bonded and connected to the battery cell.

[0010] According to some embodiments of the utility model, the battery pack further includes a thermal insulation component, which is located between the liquid cooling plate and the bottom tray, and the thermal insulation component is provided with a second avoidance groove, which is opposite to the first avoidance groove and is used to avoid the supporting rib.

[0011] According to the battery pack of some embodiments of the present invention, the liquid cooling plate includes a plurality of sub-plate portions, the plurality of sub-plate portions are spaced apart and distributed, each of the sub-plate portions is provided with a cooling channel, and the cooling channels of two adjacent sub-plate portions are connected through a connecting pipe.

[0012] According to the battery pack of some embodiments of the present invention, two of the multiple sub-plate parts are respectively provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively located at positions of the two sub-plate parts on the same side close to the bottom tray.

[0013] According to the battery pack of some embodiments of the present invention, a heat insulating member is provided between two adjacent battery cells.

[0014] The utility model also provides a vehicle.

[0015] A vehicle according to an embodiment of the utility model is provided with a battery pack as described in any one of the above embodiments.

[0016] The advantages of the vehicle and the above-mentioned battery pack over the prior art are the same and will not be elaborated here.

[0017] 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

[0018] 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:

[0019] Figure 1The structure of the battery pack according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 2 is an exploded schematic diagram of a battery pack according to an embodiment of the utility model;

[0021] Figure 3 is a structural schematic diagram of a bottom tray of a battery pack according to an embodiment of the utility model;

[0022] Figure 4 is a schematic structural diagram of a liquid cooling plate of a battery pack according to an embodiment of the utility model;

[0023] Figure 5 is a partial cross-sectional view of a liquid cooling plate of a battery pack according to an embodiment of the utility model;

[0024] Figure 6 is a partial schematic diagram of multiple battery cells of a battery pack according to an embodiment of the utility model;

[0025] Figure 7 The structure of the battery pack according to the embodiment of the utility model is shown in FIG. Figure 2 .

[0026] Reference numerals:

[0027] Battery pack 100,

[0028] Bottom tray 1, supporting ribs 11, accommodating space 12, liquid cooling plate 2, sub-plate portion 21, liquid inlet 211, liquid outlet 212, cooling channel 213, first avoidance groove 22, connecting pipe 23, battery cell 3, thermal insulation component 4, second avoidance groove 41, thermal insulation component 5. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0033] Reference below Figure 1-Figure 7 A battery pack 100 according to an embodiment of the utility model is described. By disposing a plurality of battery cells 3 to improve the energy density of the battery pack 100 and improve the endurance of the vehicle, a liquid cooling plate 2 is provided to cool the battery cells 3 and reduce the possibility of thermal runaway of the battery cells 3. Furthermore, the plurality of battery cells 3 are connected to the liquid cooling plate 2, which can improve the reliability of cooling the battery cells 3 by using the liquid cooling plate 2 and improve the connection strength between the two, thereby improving the overall structural strength of the battery pack 100.

[0034] like Figure 1-Figure 2 As shown, a battery pack 100 according to an embodiment of the present invention includes: a bottom tray 1, a liquid cooling plate 2 and a plurality of battery cells 3.

[0035] The bottom tray 1 is formed with a receiving space 12 which is open upward.

[0036] Specifically, the bottom tray 1 forms a receiving space 12 for receiving other components in the battery pack 100 . The receiving space 12 is constructed to be open upward, so that other components in the battery pack 100 can be easily arranged in the receiving space 12 from above, that is, arranged on the bottom tray 1 .

[0037] The liquid cooling plate 2 is installed in the accommodating space 12 and supported on the bottom tray 1 . A plurality of battery cells 3 are installed above the liquid cooling plate 2 , and each battery cell 3 is connected to the liquid cooling plate 2 , respectively.

[0038] Specifically, the liquid cooling plate 2 is used to realize the cooling function. The liquid cooling plate 2 is arranged in the accommodating space 12, that is, the liquid cooling plate 2 is arranged on the bottom tray 1, and the bottom tray 1 is used to support the liquid cooling plate 2. At the same time, a battery cell 3 is arranged inside the battery pack 100. The battery cell 3 is used to store electric energy to provide power for the vehicle. A plurality of battery cells 3 are arranged in the battery pack 100, and a plurality of battery cells 3 can be used to store more electric energy, thereby improving the energy density of the battery pack 100 and the endurance of the vehicle. In addition, the plurality of battery cells 3 are arranged above the liquid cooling plate 2, and the liquid cooling plate 2 can be used to cool down the plurality of battery cells 3 from the bottom of the battery cells 3 at the same time, so as to effectively reduce the possibility of thermal runaway of the battery cells 3. Each battery cell 3 is connected to the liquid cooling plate 2, so as to improve the reliability of using the liquid cooling plate 2 to cool down the plurality of battery cells 3 at the same time, and to improve the connection strength between the battery cell 3 and the liquid cooling plate 2, so as to improve the overall structural strength of the battery pack 100.

[0039] Among them, it should be noted that the battery cell 3 is directly connected to the liquid cooling plate 2. For example, the battery cell 3 can be directly bonded to the liquid cooling plate 2, which can reduce the setting of structural parts such as straps, greatly reduce the number of connectors of the battery pack 100, reduce the space occupied by the connectors inside, improve space utilization, increase the number of battery cells 3, improve the energy density of the battery pack 100, and reduce the overall weight of the battery pack 100 to meet the lightweight requirements.

[0040] Thus, by setting the bottom tray 1 as the bottom structure of the battery pack 100 to support other components in the battery pack 100, and forming the receiving space 12 on the bottom tray 1, other components in the battery pack 100 can be installed, and a plurality of battery cells 3 are arranged on the bottom tray 1 to improve the energy density of the battery pack 100. At the same time, a liquid cooling plate 2 is arranged between the bottom tray 1 and the battery cells 3, and the bottom tray 1 can be used to support the liquid cooling plate 2 and the battery cells 3, and the liquid cooling plate 2 can be used to cool the battery cells 3, and the plurality of battery cells 3 are respectively connected to the liquid cooling plate 2 to improve the reliability of using the liquid cooling plate 2 to cool the plurality of battery cells 3, and the connection strength between the liquid cooling plate 2 and the battery cells 3 can be improved. Among them, after the battery cells 3 and the liquid cooling plate 2 are installed in the bottom tray 1, a cover plate can be arranged on the upper part to close the receiving space and ensure that the battery cells 3 are in a relatively closed and stable environment.

[0041] According to the battery pack 100 of the embodiment of the utility model, a bottom tray 1 is provided to accommodate and support other components in the battery pack 100, and a plurality of battery cells 3 are provided to improve the energy density of the battery pack 100 and improve the endurance of the vehicle. At the same time, a liquid cooling plate 2 is provided between the battery cell 3 and the bottom tray 1 to cool the battery cell 3 and reduce the possibility of thermal runaway of the battery cell 3. In addition, the plurality of battery cells 3 are connected to the liquid cooling plate 2, which can improve the reliability of cooling the battery cell 3 by using the liquid cooling plate 2 and improve the connection strength between the two, which is beneficial to improving the overall structural strength of the battery pack 100.

[0042] In some embodiments, the bottom wall of the bottom tray 1 is further provided with a supporting rib 11 protruding upward, the liquid cooling plate 2 is provided with a first avoidance groove 22 , and the supporting rib 11 passes through the first avoidance groove 22 and is supported at the bottom of the battery cell 3 .

[0043] Specifically, a supporting rib 11 is formed on the bottom wall of the bottom tray 1, so that the supporting rib 11 protrudes upward, and the supporting rib 11 can be used to support the battery cell 3. A first avoidance groove 22 is provided on the liquid cooling plate 2, and the first avoidance groove 22 is used to avoid the supporting rib 11. The first avoidance groove 22 can be made to face the supporting rib 11, so that the supporting rib 11 can smoothly pass through the liquid cooling plate 2 from the first avoidance groove 22 to support the battery cell 3.

[0044] It should be noted that the bottom tray 1 can be formed by sheet metal stamping, and a supporting rib 11 is stamped out at the bottom of the bottom tray 1. The sheet metal stamping method can improve production efficiency, is easy to operate, and is easy to realize mechanized and automated production.

[0045] In some embodiments, there are multiple supporting ribs 11 , and the multiple supporting ribs 11 are distributed in parallel and spaced apart, and two ends of each battery cell 3 are respectively supported by two adjacent supporting ribs 11 .

[0046] Specifically, the supporting ribs 11 are used to support multiple battery cells 3. Multiple supporting ribs 11 are arranged in the battery pack 100, that is, the number of supporting ribs 11 can be two, three or more, so that multiple supporting ribs 11 can be used to jointly support multiple battery cells 3, that is, multiple supporting ribs 11 can jointly bear the pressure from multiple battery cells 3, which can improve the service life of the supporting ribs 11, and the multiple supporting ribs 11 are distributed and spaced apart, so that the battery cells 3 can be supported from multiple positions at the same time, and the two ends of each battery cell 3 are respectively supported on two adjacent supporting ribs 11, that is, each battery cell 3 can be supported from both ends of the battery cell 3 by two supporting ribs 11, which can improve the stability and reliability of supporting the battery cell 3.

[0047] In some embodiments, the battery cells 3 are distributed in a plurality of groups along a first direction in the accommodation space 12 , and each group includes a plurality of battery cells 3 distributed in sequence along a second direction, and the first direction is perpendicular to the second direction.

[0048] Specifically, the battery cells 3 are arranged in the accommodating space 12, and the battery cells 3 are distributed in multiple groups along the first direction, and each group has multiple battery cells 3 distributed in sequence along the second direction, so that multiple battery cells 3 can be arranged in the first direction and the second direction, which effectively increases the number of battery cells 3 and improves the energy density of the battery pack 100. The first direction can be the left-right direction of the battery pack 100, or the front-back direction of the battery pack 100, and the second direction can be the front-back direction of the battery pack 100, or the left-right direction of the battery pack 100.

[0049] It should be noted that, in Figure 1-Figure 2 and Figure 7 In the illustrated embodiment, the battery cells 3 are distributed in a plurality of groups along the left-right direction of the battery pack 100 within the accommodating space 12, and each group includes a plurality of battery cells 3 distributed in sequence along the front-back direction of the battery pack 100, that is, the first direction is the left-right direction of the battery pack 100, and the second direction is the front-back direction of the battery pack 100, and the first direction is perpendicular to the second direction.

[0050] The plurality of supporting convex ribs 11 are spaced apart in parallel along the first direction, and each supporting convex rib 11 is extended along the second direction, and the plurality of battery cells 3 in each group are supported by the same supporting convex rib 11 .

[0051] Specifically, the battery cells 3 are distributed in multiple groups along the first direction, and the multiple supporting ribs 11 are spaced apart in parallel along the first direction, so that each group of battery cells 3 can be supported by two adjacent supporting ribs 11. At the same time, each group of battery cells 3 has multiple battery cells 3 distributed along the second direction, and each supporting rib 11 is extended along the second direction. Even if the multiple battery cells 3 in each group can be supported by two adjacent supporting ribs 11, the stability and reliability of supporting the battery cells 3 can be improved, and the number of supporting ribs 11 can be reduced, thereby reducing the processing difficulty and setting cost.

[0052] For example, Figure 2-Figure 3 As shown, seven supporting convex ribs 11 are arranged on the bottom tray 1, and correspondingly, six groups of battery cells 3 are arranged in the accommodating space 12, that is, the seven supporting convex ribs 11 can be used to support the six groups of battery cells 3 at the same time, which can improve the stability and reliability of supporting the battery cells 3, and two adjacent groups of battery cells 3 can share one supporting convex rib 11, which can further reduce the number of supporting convex ribs 11, reduce the processing difficulty and setting cost. Among them, the number of battery cells 3 and the number of supporting convex ribs 11 are not limited to those described in this embodiment, and can be flexibly set according to specific conditions and space size.

[0053] And, it should be noted that the first avoidance groove 22 is used to avoid the supporting rib 11 , that is, the first avoidance groove 22 can be constructed to extend along the second direction so that the supporting rib 11 can smoothly pass through the first avoidance groove 22 .

[0054] In some embodiments, the upper surface of the supporting rib 11 is flush with the upper surface of the liquid cooling plate 2 , and the supporting rib 11 and the liquid cooling plate 2 are respectively bonded and connected to the battery cell 3 .

[0055] Specifically, the support ribs 11 can penetrate the liquid cooling plate 2 to support the battery cells 3. The liquid cooling plate 2 is connected to the battery cells 3 to cool the battery cells 3. The upper surface of the support ribs 11 is flush with the upper surface of the liquid cooling plate 2. The liquid cooling plate 2 and the battery cells 3 can be kept in contact with each other under the premise of supporting the battery cells 3 by using the support ribs 11 to support the battery cells 3, so as to improve the reliability of using the liquid cooling plate 2 to cool the battery cells 3. At the same time, the support ribs 11 are bonded to the battery cells 3 to fix the battery cells 3 to prevent the battery cells 3 from being damaged. The battery cell 3 can be moved inside the battery pack 100, and the connection between the battery cell 3 and the bottom tray 1 can be achieved, thereby improving the stability and reliability of supporting the battery cell 3 by the supporting ribs 11, and can be beneficial to improving the overall structural strength of the battery pack 100. In addition, the liquid cooling plate 2 and the battery cell 3 are bonded and connected, which can further fix the battery cell 3 and ensure that the battery cell 3 is in contact with the liquid cooling plate 2, thereby improving the reliability of cooling the battery cell 3 by the liquid cooling plate 2. Among them, the use of bonding can reduce the difficulty of processing and is easy to operate.

[0056] Also, it should be noted that constructing the support rib 11 to have a certain height can ensure the thickness of the structural adhesive, thereby ensuring the connection strength between the support rib 11 and the liquid cooling plate 2 and the battery cell 3, thereby effectively improving the structural strength of the battery pack 100, so that the battery cell 3 and the outer shell of the battery pack 100 can bear the load as a whole, thereby reducing the possibility of damage to the battery pack 100.

[0057] In some embodiments, the battery pack 100 also includes a thermal insulation component 4, which is located between the liquid cooling plate 2 and the bottom tray 1, and the thermal insulation component 4 is provided with a second avoidance groove 41, which is opposite to the first avoidance groove 22 and is used to avoid the supporting rib 11.

[0058] Specifically, a thermal insulation member 4 is provided in the battery pack 100. The thermal insulation member 4 can be used to isolate external cold air, effectively slow down the speed of power decline, and extend the service life of the battery cell 3. It can also play a buffering role, reduce the damage of the battery cell 3 during vibration or impact, and extend the service life of the battery cell 3. The thermal insulation member 4 is provided between the liquid cooling plate 2 and the bottom tray 1. The thermal insulation member 4 can be used for buffering when the battery pack 100 is hit, so as to protect the liquid cooling plate 2 and the battery cell 3, reduce the possibility of damage and failure of the liquid cooling plate 2 and the battery cell 3, and isolate the battery cell 3 from external cold air to extend the service life of the battery cell 3. At the same time, a second avoidance groove 41 is provided on the thermal insulation member 4. The second avoidance groove 41 is used to avoid the supporting rib 11 on the bottom tray 1. The second avoidance groove 41 can be opposite to the supporting rib 11, and the second avoidance groove 41 is constructed to extend along the second direction, so that the supporting rib 11 can smoothly pass through the second avoidance groove 41 to support the battery cell 3.

[0059] Among them, it should be noted that the first avoidance groove 22 and the second avoidance groove 41 are both arranged opposite to the supporting rib 11, that is, the first avoidance groove 22 and the second avoidance groove 41 are opposite to each other, so as to avoid the supporting rib 11 respectively, and improve the reliability of the supporting rib 11 supporting the battery cell 3, and the thermal insulation part 4 can adopt thermal insulation foam to utilize the thermal insulation foam to slow down the speed of power decline or to cushion when the battery pack 100 is hit.

[0060] In some embodiments, the liquid cooling plate 2 includes a plurality of sub-plate portions 21 , which are spaced apart and distributed, each sub-plate portion 21 is provided with a cooling channel 213 , and the cooling channels 213 of two adjacent sub-plate portions 21 are connected through a connecting pipe 23 .

[0061] Specifically, a plurality of sub-plate portions 21 are arranged in the liquid cooling plate 2, and a plurality of battery cells 3 can be cooled together by the plurality of sub-plate portions 21 to improve the reliability of cooling the battery cells 3, and the plurality of sub-plate portions 21 are arranged at intervals to avoid the supporting ribs 11 on the bottom tray 1, thereby improving the reliability of the supporting ribs 11 passing through the liquid cooling plate 2 to support the battery cells 3. At the same time, a cooling channel 213 is arranged in each sub-plate portion 21, and the battery cells 3 can be cooled by utilizing the flow of the coolant in the cooling channel 213. In addition, the cooling channels 213 of two adjacent sub-plate portions 21 are connected by a connecting pipe 23, so that the coolant can flow in the two adjacent sub-plate portions 21 in sequence to absorb heat, thereby improving the reliability of cooling the battery cells 3 by utilizing the liquid cooling plate 2.

[0062] It should be noted that, Figure 5As shown, each sub-plate portion 21 includes two layers, the upper layer is constructed as a flat plate, which is convenient for connection with the battery cell 3, and the lower layer is provided with a cooling channel 213, which can cool the battery cell 3, and the upper layer and the lower layer can be connected by welding to improve the connection strength between the two, and can improve the reliability of cooling the battery cell 3 by flowing the coolant in the cooling channel 213.

[0063] In some embodiments, two of the plurality of sub-plates 21 are respectively provided with a liquid inlet 211 and a liquid outlet 212 , and the liquid inlet 211 and the liquid outlet 212 are respectively located at the same side of the two sub-plates 21 close to the bottom tray 1 .

[0064] That is to say, a liquid inlet 211 can be set on one of the multiple sub-plate parts 21, so that the coolant can enter the cooling channel 213 therefrom to absorb the heat of the battery cell 3, and a liquid outlet 212 can be set on another sub-plate part 21 connected to the sub-plate part 21 through the connecting pipe 23, so that the coolant can flow out of the cooling channel 213 therefrom to take out the heat of the battery cell 3, thereby realizing the cooling function of the battery cell 3. At the same time, the liquid inlet 211 and the liquid outlet 212 are set at positions of the two sub-plate parts 21 close to the same side of the bottom tray 1, that is, the liquid inlet 211 and the liquid outlet 212 are set on the same side of the battery pack 100, which is convenient for daily operation and maintenance of the liquid inlet 211 and the liquid outlet 212. In actual use, there is no need to maintain the liquid inlet 211 and the liquid outlet 212 separately from two positions, which is convenient for operation and saves time.

[0065] It should be noted that the liquid inlet 211 and the liquid outlet 212 may be connected to external cooling pipelines respectively to achieve the circulation of the coolant and improve the reliability of cooling the battery cell 3 by using the coolant.

[0066] In such Figure 2 , Figure 4 and Figure 7In the embodiment shown, two sub-plates 21 are provided in the battery pack 100. A liquid inlet 211 can be provided on the left sub-plate 21, and a liquid outlet 212 can be provided on the right sub-plate 21. The two sub-plates 21 are connected through a connecting pipe 23, so that the coolant can flow in the two sub-plates 21 in sequence to cool the battery cell 3. At the same time, the liquid inlet 211 and the liquid outlet 212 are provided on the same side of the battery pack 100, which can facilitate the user to operate and maintain the liquid inlet 211 and the liquid outlet 212. Among them, the number of sub-plates 21 can be flexibly set according to specific needs and space size, and it can also be selected to set the liquid outlet 212 on the left sub-plate 21 and the liquid inlet 211 on the right sub-plate 21, that is, the setting positions of the liquid inlet 211 and the liquid outlet 212 are not limited to those described in this embodiment, and can be flexibly set according to specific circumstances.

[0067] In some embodiments, a heat insulating member 5 is disposed between two adjacent battery cells 3 .

[0068] Specifically, Figure 6 As shown, the battery cells 3 will generate heat during operation. A heat insulating member 5 is provided between two adjacent battery cells 3 to effectively prevent heat conduction between the two adjacent battery cells 3. This can prevent the thermal runaway of one battery cell 3 from affecting other battery cells 3, causing chain thermal runaway, increasing the scope of thermal runaway, and causing fire.

[0069] Also, it should be noted that after the battery cells 3 are loaded into the accommodating space 12, they can be flattened as a whole to ensure the flatness of the upper surfaces of the multiple battery cells 3, improve the fluency of exhaust when thermal runaway occurs in the battery cells 3, reduce the risk of thermal runaway, and then use the whole package welding method to connect the battery cell 3 poles to the palladium sheet.

[0070] The utility model also provides a vehicle.

[0071] According to the vehicle of the embodiment of the utility model, a battery pack 100 of any of the above embodiments is provided. By providing a bottom tray 1 to accommodate and support other components in the battery pack 100, multiple battery cells 3 are provided to improve the energy density of the battery pack 100 and the endurance of the vehicle. At the same time, a liquid cooling plate 2 is provided between the battery cell 3 and the bottom tray 1 to cool the battery cell 3 and reduce the possibility of thermal runaway of the battery cell 3. In addition, multiple battery cells 3 are connected to the liquid cooling plate 2, which can improve the reliability of cooling the battery cell 3 using the liquid cooling plate 2 and improve the connection strength between the two, which is beneficial to improve the overall structural strength of the battery pack 100.

[0072] 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.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A bottom tray, wherein the bottom tray is formed with a receiving space open upward; A liquid cooling plate and a plurality of battery cells, wherein the liquid cooling plate is installed in the accommodation space and supported on the bottom tray, the plurality of battery cells are installed above the liquid cooling plate, and each of the battery cells is respectively connected to the liquid cooling plate; The bottom wall of the bottom tray is further provided with a supporting convex rib protruding upward, the liquid cooling plate is provided with a first avoidance groove, and the supporting convex rib penetrates the first avoidance groove and is supported on the bottom of the battery cell.

2. The battery pack according to claim 1, characterized in that: There are a plurality of supporting convex ribs, and the plurality of supporting convex ribs are distributed in parallel and spaced apart, and two ends of each of the battery cells are respectively supported by two adjacent supporting convex ribs.

3. The battery pack according to claim 2, characterized in that: The battery cells are distributed in a plurality of groups along a first direction in the accommodation space, and each group includes a plurality of battery cells distributed in sequence along a second direction, and the first direction is perpendicular to the second direction; The plurality of support ribs are spaced apart in parallel along the first direction, and each of the support ribs is extended along the second direction, and the plurality of battery cells in each group are supported by the same support rib.

4. The battery pack according to claim 1, characterized in that: The upper surface of the supporting convex rib is flush with the upper surface of the liquid cooling plate, and the supporting convex rib and the liquid cooling plate are respectively bonded and connected to the battery core.

5. The battery pack according to claim 1, characterized in that: It also includes a heat-insulating component, which is located between the liquid cooling plate and the bottom tray, and the heat-insulating component is provided with a second avoidance groove, which is directly opposite to the first avoidance groove and is used to avoid the supporting ribs.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The liquid cooling plate comprises a plurality of sub-plate parts, which are spaced apart and distributed. A cooling channel is arranged in each of the sub-plate parts, and the cooling channels of two adjacent sub-plate parts are connected through a connecting pipe.

7. The battery pack according to claim 6, characterized in that: Two of the plurality of sub-plate parts are respectively provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively located at positions of the two sub-plate parts close to the same side of the bottom tray.

8. The battery pack according to any one of claims 1 to 5, characterized in that: A heat insulating member is provided between two adjacent battery cells.

9. A vehicle, characterized in that: A battery pack according to any one of claims 1 to 8 is provided.

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