Battery box for vehicle and vehicle

Abstract

The utility model discloses a battery box body for a vehicle and the vehicle, the battery box body comprises a basin body and a liquid cooling plate, and a battery pack accommodating cavity is formed in the basin body; a flow channel groove is formed in the side, facing the basin body, of the liquid cooling plate, the liquid cooling plate is arranged on the bottom wall of the basin body, the bottom wall of the basin body is attached to the liquid cooling plate and seals the flow channel groove, and a cooling flow channel is formed between the liquid cooling plate and the basin body. According to the battery box body disclosed by the utility model, the cooling flow channel is formed between the bottom wall of the basin body and the liquid cooling plate, so that the heat-conducting property of the battery box body is improved, and the lightweight design of the battery box body can be realized.

Description

Technical Field

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

[0002] The new energy vehicle industry is developing rapidly, and the technical level and industrial scale of power batteries are also growing rapidly. Improving the technical performance of power batteries is the key to development. At the same time, safety, as the fundamental guarantee for future development, is the prerequisite for all technological innovations.

[0003] The weight of the power battery system accounts for a high proportion of the total vehicle weight. Considering the need for lightweighting of the entire vehicle in order to achieve a longer driving range, a lightweight design of the battery box is essential.

[0004] The heat of the battery cells is transferred to the liquid cooling plate at the bottom of the battery case to prevent internal heat accumulation from causing overheating and posing a huge safety hazard. Therefore, the thermal conductivity of the liquid cooling plate is very important for the safety of the battery pack.

[0005] CN113328185A discloses a battery pack water-cooling box, which includes a battery pack box, a plurality of heating slots are arranged in the battery pack box, three connecting holes are arranged in the battery pack box, and two second mounting holes are arranged on the side wall of the battery pack box; the connecting holes are respectively connected to the first water outlet of the water cooling plate, the water inlet of the water cooling plate, and the second water outlet of the water cooling plate, and the second mounting holes are respectively connected to the water inlet of the box and the water outlet of the box.

[0006] The problems of insufficient thermal conductivity of existing power battery cases and insufficient lightweight design of battery cases need to be solved urgently. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery box for a vehicle. According to the battery box of the utility model, by forming a cooling channel between the bottom wall of the basin and the liquid cooling plate, the thermal conductivity of the battery box is improved, and the lightweight design of the battery box can be achieved.

[0008] The utility model also provides a vehicle with the battery box.

[0009] According to the utility model, the battery case is used for a vehicle, and the battery case includes: a basin body, a battery pack accommodating cavity is formed in the basin body; a liquid cooling plate, a flow channel is formed on the side of the liquid cooling plate facing the basin body, the liquid cooling plate is arranged on the bottom wall of the basin body, the bottom wall of the basin body is attached to the liquid cooling plate and closes the flow channel, and a cooling flow channel is formed between the liquid cooling plate and the basin body.

[0010] According to the battery case of the utility model, the battery pack accommodating cavity is suitable for accommodating battery cells. By forming a cooling channel between the bottom wall of the basin and the liquid cooling plate, the thermal conductivity of the battery case can be improved. Since a flow channel groove is formed on the side of the liquid cooling plate facing the basin, and the bottom wall of the basin is attached to the liquid cooling plate and the flow channel groove is closed to form a cooling channel, the coolant directly contacts the bottom wall of the basin when flowing in the cooling channel, so that the heat emitted by the battery cells in the battery pack accommodating cavity can be effectively absorbed and carried away by the coolant, thereby improving the thermal conductivity of the entire battery case. Since a cooling channel is formed between the liquid cooling plate and the basin, no additional cooling system or structure is required, so the weight of the battery case can be reduced, and a lightweight design of the battery case can be achieved.

[0011] According to some embodiments of the utility model, the liquid cooling plate is formed with a first cooling zone and a second cooling zone spaced apart from each other, a plurality of first flow channel grooves spaced apart from each other are formed in the first cooling zone, and a plurality of second flow channel grooves spaced apart from each other are formed in the second cooling zone; wherein a third flow channel groove connecting the first cooling zone with the second cooling zone is formed at the edge of the liquid cooling plate.

[0012] According to some embodiments of the present invention, a sealing edge is formed on the edge of the liquid cooling plate, and the sealing edge is connected to the bottom wall of the basin to close the flow channel; wherein the sealing edge is formed with an inlet flow channel and an outlet flow channel connected to the first cooling zone.

[0013] According to some embodiments of the utility model, the basin body includes: a bottom plate, one side of which is connected to the liquid cooling plate; a side plate, which is arranged on the outer periphery of the bottom plate and defines the battery pack accommodating cavity with the other side of the bottom plate; wherein at least a portion of the edge of the bottom plate is inclined away from the liquid cooling plate in a direction away from the battery pack accommodating cavity.

[0014] According to some embodiments of the present invention, the bottom plate is constructed as a rectangular plate, and the four corners of the rectangular plate are inclined away from the liquid cooling plate in a direction away from the battery pack accommodating cavity.

[0015] According to some embodiments of the utility model, the battery box further comprises: a frame, the frame is arranged around the outer periphery of the side plate, and a reinforcement groove recessed toward the basin body is formed on the surface of the frame away from the basin body.

[0016] According to some embodiments of the present invention, the battery box further comprises: a connecting ear, which is arranged on a surface of the frame facing away from the basin, and at least a portion of the connecting ear protrudes in a direction away from the basin.

[0017] According to some embodiments of the utility model, the battery box further comprises: a bottom guard plate, which is arranged on a side of the liquid cooling plate away from the basin, and at least a portion of the bottom guard plate is abutted against and connected to the frame.

[0018] According to some embodiments of the present invention, the basin and / or the liquid cooling plate are constructed as aluminum alloy parts.

[0019] The vehicle according to the present utility model is briefly described below.

[0020] The vehicle according to the utility model includes the battery box described in any one of the above embodiments. Since the vehicle according to the utility model includes the battery box described in any one of the above embodiments, the vehicle according to the utility model has obvious advantages in battery heat dissipation and light weight, and the overall energy efficiency and handling performance of the vehicle are improved.

[0021] 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

[0022] 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:

[0023] Figure 1 It is a structural schematic diagram of a battery box according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a basin frame of a battery box according to an embodiment of the utility model;

[0025] Figure 3 This is a schematic structural diagram of a liquid cooling plate of a battery box according to an embodiment of the utility model;

[0026] Figure 4 This is a schematic structural diagram of the connection between the basin frame of the battery box and the liquid cooling plate according to one embodiment of the utility model;

[0027] Figure 5 It is a partial cross-sectional schematic diagram of the frame and bottom guard plate of a battery box according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] Battery box 1;

[0030] Basin body 11, bottom plate 111, side plate 112;

[0031] Liquid cooling plate 12, flow channel groove 121, first flow channel groove 1211, second flow channel groove 1212, third flow channel groove 1213, edge sealing portion 122;

[0032] Frame 13, reinforcement groove 131, connecting lug 132;

[0033] Bottom guard plate 14. DETAILED DESCRIPTION

[0034] 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.

[0035] In the related technology, the existing power battery box has insufficient thermal conductivity and the battery box has insufficient lightweight design, which needs to be solved urgently.

[0036] Reference below Figure 1-Figure 5 A battery box 1 according to an embodiment of the present utility model is described.

[0037] According to the utility model, the battery box 1 is used for a vehicle, and the battery box 1 includes a basin 11 and a liquid cooling plate 12. A battery pack accommodating cavity is formed in the basin 11. A flow channel 121 is formed on the side of the liquid cooling plate 12 facing the basin 11. The liquid cooling plate 12 is arranged on the bottom wall of the basin 11. The bottom wall of the basin 11 is attached to the liquid cooling plate 12 and the flow channel 121 is closed. A cooling flow channel is formed between the liquid cooling plate 12 and the basin 11.

[0038] like Figure 1-Figure 4 As shown, the battery case 1 of the present application, the battery pack accommodating cavity is suitable for accommodating battery cells. By forming a cooling channel between the bottom wall of the basin 11 and the liquid cooling plate 12, the thermal conductivity of the battery case 1 can be improved. Since the liquid cooling plate 12 is formed with a flow channel groove 121 on the side facing the basin 11, and the bottom wall of the basin 11 is attached to the liquid cooling plate 12 and the flow channel groove 121 is closed to form a cooling channel, the coolant directly contacts the bottom wall of the basin 11 when flowing in the cooling channel, so that the heat emitted by the battery cells in the battery pack accommodating cavity can be effectively absorbed and carried away by the coolant, thereby improving the thermal conductivity of the entire battery case 1. Since a cooling channel is formed between the liquid cooling plate 12 and the basin 11, and no additional cooling system or structure is required, the weight of the battery case 1 can be reduced, and the lightweight design of the battery case 1 can be achieved.

[0039] Therefore, the battery case 1 of the present application improves the thermal conductivity of the battery case 1 by forming a cooling channel between the bottom wall of the basin 11 and the liquid cooling plate 12, and can achieve a lightweight design of the battery case 1.

[0040] According to some embodiments of the present invention, Figure 3 As shown, the liquid cooling plate 12 is formed with a first cooling zone and a second cooling zone spaced apart from each other, a plurality of first flow channel grooves 1211 spaced apart from each other are formed in the first cooling zone, and a plurality of second flow channel grooves 1212 spaced apart from each other are formed in the second cooling zone; wherein a third flow channel groove 1213 is formed at the edge of the liquid cooling plate 12 to connect the first cooling zone with the second cooling zone. By setting the first cooling zone and the second cooling zone separately, the temperature of the two zones can be better controlled. At the same time, the plurality of first flow channel grooves 1211 formed in the first cooling zone and the plurality of second flow channel grooves 1212 formed in the second cooling zone can increase the heat exchange area inside the liquid cooling plate 12 and improve the heat conduction efficiency. The third flow channel groove 1213 on the edge can realize the liquid flow connection between the first cooling zone and the second cooling zone, so that the heat can be more fully transferred and dispersed. Therefore, the liquid cooling plate 12 can effectively improve the heat conduction efficiency, thereby enhancing the heat dissipation performance.

[0041] According to some embodiments of the present invention, Figure 3 As shown, a sealing edge 122 is formed at the edge of the liquid cooling plate 12, and the sealing edge 122 is connected to the bottom wall of the basin body 11 to close the flow channel groove 121; wherein the sealing edge 122 is formed with an inlet flow channel groove 121 and an outlet flow channel groove 121 that are connected to the first cooling zone. By connecting the sealing edge 122 to the bottom wall of the basin body 11, the flow channel groove 121 can be effectively closed to prevent liquid leakage or external impurities from entering the cooling channel. At the same time, the inlet flow channel groove 121 and the outlet flow channel groove 121 formed on the sealing edge 122 can realize the inflow and outflow of the coolant. Therefore, the liquid cooling plate 12 has a reliable sealing performance, which enables the coolant to circulate stably in the cooling channel and improves the heat dissipation efficiency.

[0042] According to some embodiments of the present invention, Figure 2As shown, the basin body 11 includes a bottom plate 111 and a side plate 112, one side of the bottom plate 111 is connected to the liquid cooling plate 12; the side plate 112 is arranged on the periphery of the bottom plate 111 and defines a battery pack accommodating chamber with the other side of the bottom plate 111; wherein at least part of the edge of the bottom plate 111 is inclined away from the liquid cooling plate 12 in a direction away from the battery pack accommodating chamber. By connecting one side of the bottom plate 111 to the liquid cooling plate 12, effective heat conduction and heat dissipation can be achieved. The liquid cooling plate 12 can absorb the heat generated by the battery pack and conduct the heat away through the bottom plate 111, thereby keeping the temperature of the battery pack within a safe range. The setting of the side plate 112 can define the battery pack accommodating chamber and provide stable support and protection for the battery pack. The connection between the side plate 112 and the bottom plate 111 can ensure the stability of the battery cell in the accommodating chamber and reduce the impact of external shock or vibration on the battery cell. By tilting at least part of the edge of the bottom plate 111 away from the liquid cooling plate 12 in the direction away from the battery pack housing cavity, the side plate 112 and the bottom plate 111 are arranged at an obtuse angle. Compared with the traditional right-angle connection, the angle between the side plate 112 and the bottom plate 111 becomes larger, which can better disperse the stress and reduce the risk of cracks.

[0043] According to some embodiments of the utility model, the bottom plate 111 is constructed as a rectangular plate, and the four corners of the rectangular plate are tilted away from the liquid cooling plate 12 in the direction away from the battery pack housing. By constructing the bottom plate 111 as a rectangular plate, the battery having the battery case 1 is a square battery, and the square battery has good structural strength, effective heat dissipation performance and high energy density. Traditional square batteries usually have a flat rectangular plate, and the four corners of the rectangular plate are stressed and prone to gaps. According to an embodiment of the utility model, by tilting the four corners of the rectangular plate away from the liquid cooling plate 12 in the direction away from the battery pack housing, the stress can be better dispersed, the stress concentration at the four corners of the rectangular plate can be further reduced, and the risk of cracks can be reduced, thereby improving the performance and service life of the battery.

[0044] According to some embodiments of the present invention, Figure 1 As shown, the battery case 1 also includes a frame 13, which is arranged around the outer periphery of the side panel 112, and a reinforcing groove 131 is formed on the surface of the frame 13 facing away from the basin body 11, which is recessed toward the basin body 11. By surrounding the frame 13 around the outer periphery of the side panel 112, the structural strength and stability of the battery case 1 are improved. The provision of the frame 13 enables the side panel 112 to effectively disperse and absorb the impact force when it is subjected to external pressure, thereby reducing the risk of deformation of the side panel 112. By providing the reinforcing groove 131 on the frame 13, the reinforcing groove 131 can make the connection between the frame 13 and the side panel 112 tighter, thereby improving the rigidity of the entire battery case 1, and can effectively improve the anti-deformation ability of the battery case 1, so that the battery case 1 is more stable when subjected to external pressure.

[0045] According to some embodiments of the present invention, the connection method between the bottom guard plate 14 and the outer frame may include but is not limited to welding, riveting and screwing. Specifically, the bottom guard plate 14 and the outer frame can be connected by any one of welding, riveting and screwing, so that the bottom guard plate 14 and the outer frame are firmly connected.

[0046] According to some embodiments of the present invention, Figure 1 As shown, the battery box 1 also includes a connecting lug 132, which is arranged on the surface of the frame 13 away from the basin 11, and at least part of the connecting lug 132 protrudes in a direction away from the basin 11. By arranging the connecting lug 132 on the frame 13, the protruding part of the connecting lug 132 on the frame 13 can conveniently connect the battery box 1 with other structures on the vehicle, thereby improving the convenience of installation. The arrangement of the connecting lug 132 enables the battery box 1 to disperse and absorb the impact force through the connecting lug 132 when it is subjected to external pressure, thereby improving the overall stability.

[0047] According to some embodiments of the present invention, Figure 1 and Figure 5 As shown, the battery box 1 also includes a bottom guard plate 14, which is arranged on the side of the liquid cooling plate 12 away from the basin 11, and at least part of the bottom guard plate 14 is abutted against and connected to the frame 13. The close connection between the bottom guard plate 14 and the frame 13 allows the battery box 1 to form a closed space between the bottom guard plate 14 and the basin 11, thereby preventing liquid leakage and improving the sealing performance of the battery box 1. By providing the bottom guard plate 14 and the connection between the bottom guard plate 14 and the frame 13, the battery box 1 can disperse and absorb the impact force through the bottom guard plate 14 when it is subjected to external pressure, thereby improving the overall stability and extending the service life of the battery box 1.

[0048] According to some embodiments of the utility model, the basin body 11 and / or the liquid cooling plate 12 are constructed as aluminum alloy parts. Aluminum alloy has the characteristics of high strength and low density. By constructing the basin body 11 and / or the liquid cooling plate 12 as aluminum alloy parts, the battery case 1 reduces its own weight while maintaining sufficient strength, which is beneficial to improving the use efficiency and cruising range of the battery. Aluminum alloy has good thermal conductivity, so that heat can be quickly transferred from the battery cell to the liquid cooling plate 12, thereby improving the heat dissipation efficiency. Aluminum alloy has good corrosion resistance, so that the battery case 1 can effectively resist corrosion and extend its service life when used in harsh environments. The processing performance of aluminum alloy materials is good, which is easy to produce and process. At the same time, the installation process is relatively simple, which reduces production costs and time.

[0049] The vehicle according to the present utility model is briefly described below.

[0050] The vehicle according to the utility model includes the battery box 1 in any one of the above embodiments. Since the vehicle according to the utility model includes the battery box 1 in any one of the above embodiments, the vehicle according to the utility model has obvious advantages in battery heat dissipation and light weight, and the overall energy efficiency and handling performance of the vehicle are improved.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0053] In the description of the present invention, "plurality" means two or more.

[0054] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0055] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0056] 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.

Claims

1. A battery box for a vehicle, characterized in that: include: A basin body (11), wherein a battery pack accommodating cavity is formed in the basin body (11); A liquid cooling plate (12), wherein a flow channel (121) is formed on a side of the liquid cooling plate (12) facing the basin (11), the liquid cooling plate (12) is arranged on the bottom wall of the basin (11), the bottom wall of the basin (11) is in contact with the liquid cooling plate (12) and closes the flow channel (121), and a cooling flow channel is formed between the liquid cooling plate (12) and the basin (11).

2. The battery box for a vehicle according to claim 1, characterized in that: The liquid cooling plate (12) is formed with a first cooling zone and a second cooling zone which are spaced apart from each other, a plurality of first flow channel grooves (1211) which are spaced apart from each other are formed in the first cooling zone, and a plurality of second flow channel grooves (1212) which are spaced apart from each other are formed in the second cooling zone; wherein A third flow channel groove (1213) is formed on the edge of the liquid cooling plate (12) for connecting the first cooling area with the second cooling area.

3. The battery box for a vehicle according to claim 2, characterized in that: The edge of the liquid cooling plate (12) is formed with an edge sealing portion (122), and the edge sealing portion (122) is connected to the bottom wall of the basin body (11) to close the flow channel groove (121); wherein The edge sealing portion (122) is formed with a water inlet channel groove (121) and a water outlet channel groove (121) which are in communication with the first cooling zone.

4. The battery box for a vehicle according to claim 1, characterized in that: The basin body (11) comprises: A bottom plate (111), one side of the bottom plate (111) being connected to the liquid cooling plate (12); a side plate (112), the side plate (112) being arranged on the outer periphery of the bottom plate (111) and defining the battery pack accommodating cavity with the other side of the bottom plate (111); wherein At least part of the edge of the bottom plate (111) is arranged to be inclined away from the liquid cooling plate (12) in a direction away from the battery pack accommodating cavity.

5. The battery box for a vehicle according to claim 4, characterized in that: The bottom plate (111) is constructed as a rectangular plate, and the four corners of the rectangular plate are arranged to be inclined away from the liquid cooling plate (12) in a direction away from the battery pack accommodating cavity.

6. The battery box for a vehicle according to claim 4, characterized in that: Also includes: A frame (13) is arranged around the outer periphery of the side plate (112), and a reinforcement groove (131) is formed on a surface of the frame (13) facing away from the basin body (11) and is recessed toward the basin body (11).

7. The battery box for a vehicle according to claim 6, characterized in that: Also includes: A connecting ear (132) is arranged on a surface of the frame (13) facing away from the basin body (11), and at least a portion of the connecting ear (132) protrudes in a direction away from the basin body (11).

8. The battery box for a vehicle according to claim 6, characterized in that: Also includes: A bottom guard plate (14), the bottom guard plate (14) being arranged on a side of the liquid cooling plate (12) away from the basin body (11), and at least a portion of the bottom guard plate (14) being abutted against and connected to the frame (13).

9. The battery box for a vehicle according to claim 1, characterized in that: The basin body (11) and / or the liquid cooling plate (12) are constructed as aluminum alloy parts.

10. A vehicle, characterized in that: A battery case (1) comprising the battery case (1) as claimed in any one of claims 1 to 9.

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