Battery pack shell and vehicle

Abstract

The utility model provides a battery pack shell and a vehicle. The battery pack shell comprises a shell and a plurality of cold plates assembled to the shell. The plurality of cold plates are arranged at intervals along the height direction of the battery pack shell, and a battery cell mounting space is formed between every two adjacent cold plates. The shell is provided with a water inlet and a water outlet. The cold plate is provided with a cavity flow channel, and the cavity flow channel is communicated with the water inlet and the water outlet. The multiple cold plates are arranged in the height direction, the battery pack shell can make contact with the battery cells from the upper side and the lower side through the cold plates, the contact area between the battery pack shell and the battery cells is increased, and the temperature regulation and control effect of the battery pack shell on the battery cells is improved. And meanwhile, the runner is formed through the cavity structure, so that the structural strength of the cold plate is improved, and the structural strength of the battery pack shell is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery pack shell and a vehicle. BACKGROUND

[0002] With the continuous development of technology, new energy vehicles have gradually become popular. The battery pack is an important part of new energy vehicles, which provides power source for the vehicle. Temperature is an important factor affecting the working performance of the battery pack. On the one hand, during the high-rate rapid charging process, the battery pack needs to be fully cooled to ensure the battery life. On the other hand, in cold areas, the battery pack needs to be kept warm to improve the charging efficiency. At present, the battery pack shell is provided with a cold plate at the bottom and is in contact with the bottom of the battery cell. However, since the battery cell is only contacted at the bottom, the temperature regulation effect of the existing battery pack shell is poor. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a battery pack shell and a vehicle to solve the related technical problems.

[0004] The present application provides a battery pack shell, which comprises a shell and a plurality of cold plates assembled to the shell; the plurality of cold plates are arranged at intervals along the height direction of the battery pack shell, and an electric cell mounting space is formed between adjacent cold plates; the shell is provided with a water inlet and a water outlet; the cold plate is provided with a cavity flow channel, and the cavity flow channel is connected with the water inlet and the water outlet.

[0005] By arranging a plurality of cold plates along the height direction, the cold plates contact the battery cell from the top and bottom, increase the contact area with the battery cell, and improve the temperature regulation effect of the battery pack shell on the battery cell. Moreover, when the battery pack shell is subjected to a collision, the cold plate can support the battery pack shell, thereby improving the structural strength of the battery pack shell. At the same time, the flow channel is formed by the cavity structure, thereby improving the structural strength of the cold plate, and further improving the structural strength of the battery pack shell.

[0006] Further, the cold plate comprises an upper cold plate, a middle cold plate and a lower cold plate; the upper cold plate and the lower cold plate are arranged opposite to each other in the height direction, and the middle cold plate is arranged between the upper cold plate and the lower cold plate to form a first electric cell mounting space and a second electric cell mounting space on both sides of the middle cold plate.

[0007] By arranging three layers of cold plates and forming a first electric cell mounting space and a second electric cell mounting space, the number of battery cells that can be accommodated by the battery pack shell is increased. At the same time, the temperature of each layer of battery cells is regulated by two layers of cold plates, thereby improving the temperature regulation effect of the battery pack shell on the battery cells.

[0008] Further, a pair of shared water pipes are further included; one of the pair of shared water pipes is assembled to the water inlet, and the other of the pair of shared water pipes is assembled to the water outlet; at least two of the upper cold plate, the middle cold plate and the lower cold plate are connected to the shared water pipes.

[0009] Thanks to the shared water pipes, at least two of the upper cold plate, the middle cold plate and the lower cold plate can simultaneously conduct fluid inflow and outflow through the shared water pipes, thus improving the compactness of the battery pack shell and reducing the cost.

[0010] Further, in the height direction, the water inlet and the water outlet are located between the middle cold plate and the lower cold plate; the pair of shared water pipes are respectively upwardly extended from the positions of the water inlet and the water outlet and bent away from each other to form; the lower cold plate is connected to the bottom of the shared water pipes, and the upper cold plate and the middle cold plate are connected to the top of the shared water pipes.

[0011] Thanks to the upward extension of the shared water pipes, the shared water pipes are vertically arranged as a whole, the lower cold plate is connected to the bottom of the shared water pipes, and the middle cold plate and the upper cold plate are connected to the top of the shared water pipes, thus optimizing the layout of the water pipes and further improving the structural compactness of the battery pack shell.

[0012] Further, the cavity flow channel includes a flow-in section and a flow-out section in communication, the flow-in section is in communication with the water inlet, the flow-out section is in communication with the water outlet, and the extension directions of the flow-in section and the flow-out section are opposite.

[0013] By arranging the flow-in section and the flow-out section with opposite extension directions, the travel distance of the cavity flow channel is extended, and the temperature regulation effect of the battery pack shell on the battery cells is improved.

[0014] Further, a first partition plate is arranged in the flow-in section, the first partition plate is arranged along the thickness direction of the cold plate to separate the flow-in section into a plurality of sub-flow-in sections; and / or, a second partition plate is arranged in the flow-out section, the second partition plate is arranged along the thickness direction of the cold plate to separate the flow-out section into a plurality of sub-flow-out sections.

[0015] By arranging the partition plates, the flow-in section and the flow-out section are separated, which can guide the fluid to flow orderly in the flow-in section or the flow-out section, so that the fluid can smoothly exchange heat with the battery cells, thus improving the temperature regulation effect of the battery pack shell.

[0016] Further, the number of the first partition plates is a plurality, and the plurality of first partition plates are arranged at intervals in a direction perpendicular to the extension direction of the flow-in section; the thicknesses of at least two of the first partition plates are different.

[0017] Due to the different thicknesses of the first partitions, the battery pack housing can balance the flow rate and flow resistance of the fluid by adjusting the thicknesses of the first partitions to divide the inflow section in different forms, further improving the temperature regulation effect of the battery pack housing.

[0018] Further, the number of the second partitions is multiple, and the multiple second partitions are arranged at intervals in the direction perpendicular to the extension direction of the outflow section; and the thicknesses of at least two of the second partitions are different.

[0019] Due to the different thicknesses of the second partitions, the battery pack housing can balance the flow rate and flow resistance of the fluid by adjusting the thicknesses of the second partitions to divide the outflow section in different forms, further improving the temperature regulation effect of the battery pack housing.

[0020] Further, the cold plate is extruded to have a high structural strength, so as to improve the overall structural strength of the battery pack housing.

[0021] The application also provides a vehicle comprising the battery pack housing and an electric core, the electric core being installed in the electric core installation space; and the electric core is in abutment with the adjacent cold plates on both sides in the height direction. Since the electric core is in abutment with the cold plates on both sides, the electric core can be better temperature-regulated, the performance of the electric core is improved, and the use experience of the vehicle is improved.

[0022] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the specification. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings incorporated in the specification and forming a part of the specification illustrate embodiments consistent with the present specification and, together with the specification, serve to explain the principles of the present specification.

[0024] Figure 1 is a structural diagram of a battery pack housing in an exemplary embodiment of the present application;

[0025] Figure 2 is Figure 1 is a sectional view of the battery pack housing in

[0026] Figure 3 is Figure 2 is a sectional view of the cold plate in

[0027] Figure 4 is Figure 2 is a partial enlarged view of the square in

[0028] Reference numerals: Casing - 10; Cell mounting space - 100; First cell mounting space - 101; Second cell mounting space - 102; Inlet - 11; Outlet - 12; Upper casing - 13; Lower casing - 14; Connecting part - 15; Cable interface - 16; Cold plate - 20; Cavity flow channel - 200; Inflow section - 201; Sub-inflow section - 2011; Outflow section - 202; Sub-outflow section - 2021; Wall - 203; First partition - 20 4; Second partition - 205; Upper cold plate - 21; Upper water inlet connector - 211; Upper water outlet connector - 212; Middle cold plate - 22; Middle water inlet connector - 221; Middle water outlet connector - 222; Lower cold plate - 23; Lower water inlet connector - 231; Lower water outlet connector - 232; Lug - 24; Common water pipe - 30; Bottom - 301; Top - 302; Pipe body - 31; Upper connector - 32; Middle connector - 33; Lower connector - 34. Detailed Implementation

[0029] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0031] Currently, battery pack casings have a cooling plate at the bottom that contacts the bottom of the battery cells. However, because the cells are only in contact at the bottom, the temperature control effect of existing battery pack casings is poor. This application provides a battery pack casing to solve the related technical problems.

[0032] like Figures 1 to 3 As shown, this application provides a battery pack housing, including a housing 10 and a plurality of cold plates 20 assembled to the housing 10. The plurality of cold plates 20 are arranged along the height direction of the battery pack housing (i.e., Figure 1 The cold plates 20 are spaced apart in the direction indicated by the straight line l, forming a cell mounting space 100 between adjacent cold plates 20. The housing 10 is provided with a water inlet 11 and a water outlet 12. The cold plate 20 is provided with a cavity flow channel 200, which connects the water inlet 11 and the water outlet 12.

[0033] By arranging multiple cold plates 20 along the height direction, the cold plates 20 contact the battery cell from the top and bottom sides, increasing the contact area with the battery cell and improving the temperature regulation effect of the battery pack shell on the battery cell. Moreover, when the battery pack shell is subjected to a collision, the cold plates 20 can support the battery pack shell, improving the structural strength of the battery pack shell. At the same time, the flow channel is formed by the cavity structure, improving the structural strength of the cold plates 20, thereby further improving the structural strength of the battery pack shell.

[0034] The application also provides a vehicle comprising a battery cell (not shown in the figure) and the above-mentioned battery pack shell. The battery cell is installed in the battery cell installation space 100. The battery cell is in abutment with the adjacent cold plates 20 on both sides in the height direction. Since both sides are in abutment with the cold plates 20, the battery cell can be better temperature-regulated, improving the performance of the battery cell and the user experience of the vehicle. The vehicle of the application can be an electric vehicle or a hybrid vehicle, and the specific type is not limited.

[0035] The water inlet 11 and the water outlet 12 of the battery pack shell can be connected to the thermal management system of the vehicle to regulate the temperature of the battery cell. Due to the increased heat dissipation effect, on the one hand, when rapid charging is performed, the heat dissipation effect of the battery pack shell on the battery cell is improved, prolonging the service life of the battery cell, and the charging rate of the battery can be further improved, increasing the charging efficiency. On the other hand, in cold regions, the battery pack shell can provide good preheating effect for the battery cell, and the battery cell can reach the charging and discharging temperature requirement in a short time, improving the charging efficiency of the battery cell.

[0036] At the same time, since multiple cold plates 20 are arranged along the height direction, when the vehicle is subjected to a side collision, the cold plates 20 can support the battery pack shell, avoiding deformation of the battery pack shell to squeeze the battery cell, improving the safety performance of the vehicle.

[0037] As shown in Figure 1 The shell 10 comprises an upper box 13 and a lower box 14 combinedly installed. The water inlet 11 and the water outlet 12 are arranged on the lower box 14. The lower box 14 protrudes towards both sides to form a connecting part 15. The connecting part 15 is used to install the battery pack shell to the vehicle body. The connecting part 15 can be screw-connected to the vehicle body. The lower box 14 is provided with a cable interface 16 for electrical connection.

[0038] In an embodiment, as shown in Figure 2 and Figure 3As shown, the cold plate 20 includes an upper cold plate 21, a middle cold plate 22, and a lower cold plate 23. The upper cold plate 21, the middle cold plate 22, and the lower cold plate 23 are all provided with a cavity flow channel 200. The upper cold plate 21 can be screw-connected to the upper box body 13. The middle cold plate 22 can be screw-connected to the lower box body 14. The lower cold plate 23 can be installed to the lower box body 14 by screwing, welding, or the like. The lower cold plate 23 can also be integrally formed with the lower box body 14.

[0039] The upper cold plate 21 and the lower cold plate 23 are oppositely arranged in the height direction. The middle cold plate 22 is arranged between the upper cold plate 21 and the lower cold plate 23 to form a first battery cell mounting space 101 and a second battery cell mounting space 102 on both sides of the middle cold plate 22.

[0040] By arranging three layers of cold plates and forming the first battery cell mounting space 101 and the second battery cell mounting space 102, the number of battery cells that can be accommodated by the battery pack shell is increased. At the same time, the battery cells in each layer are subjected to temperature regulation by two layers of cold plates, thereby improving the temperature regulation effect of the battery pack shell on the battery cells.

[0041] The cavity flow channel 200 inside the upper cold plate 21, the middle cold plate 22, and the lower cold plate 23 has a similar structure. In an embodiment, as shown in Figure 3 The cavity flow channel 200 includes a flow-in section 201 and a flow-out section 202 that are in communication. A wall body 203 is arranged inside the cold plate 20 to separate the cavity flow channel 200 to form the flow-in section 201 and the flow-out section 202. The flow-in section 201 is in communication with the water inlet 11. The flow-out section 202 is in communication with the water outlet 12. The extension directions of the flow-in section 201 and the flow-out section 202 are opposite.

[0042] By arranging the flow-in section 201 and the flow-out section 202 with opposite extension directions, the length of the cavity flow channel 200 is increased, the travel distance of the fluid is prolonged, the heat exchange amount is increased, and the temperature regulation effect of the battery pack shell on the battery cells is improved.

[0043] In an embodiment, as shown in Figure 3 A first partition plate 204 is arranged in the flow-in section 201, and the first partition plate 204 is arranged along the thickness direction of the cold plate 20 to separate the flow-in section 201 into a plurality of sub-flow-in sections 2011. A second partition plate 205 is arranged in the flow-out section 202, and the second partition plate 205 is arranged along the thickness direction of the cold plate 20 to separate the flow-out section 202 into a plurality of sub-flow-out sections 2021.

[0044] By arranging the partition plates to separate the flow-in section 201 and the flow-out section 202, the fluid can be guided to flow orderly in the flow-in section 201 and the flow-out section 202, so that the fluid can smoothly exchange heat with the battery cells, and the temperature regulation effect of the battery pack shell is improved.

[0045] In the coordinate system as shown in Figure 3 In the coordinate system as shown in

[0046] In an embodiment, the number of the first partitions 204 can be set to be multiple. The multiple first partitions 204 are arranged at intervals in a direction perpendicular to the extension direction of the inflow section 201. The thicknesses of at least two of the first partitions 204 are different. Due to the different thicknesses of the first partitions 204, the battery pack shell can adjust the thicknesses of the first partitions 204 to divide the inflow section 201 in different forms to balance the flow rate and flow resistance of the fluid, further improving the temperature regulation effect of the battery pack shell.

[0047] Specifically, the inflow section 201 extends along the front-rear direction of the vehicle, and the multiple first partitions 204 are arranged at intervals along the left-right direction of the vehicle, i.e., the Y1-Y2 direction shown in the figure. The number of the first partitions 204 can be four, dividing the inflow section 201 into five sub-inflow sections 2011.

[0048] In an embodiment, the number of the second partitions 205 can also be set to be multiple. The multiple second partitions 205 are arranged at intervals in a direction perpendicular to the extension direction of the outflow section 202. The thicknesses of at least two of the second partitions 205 are different. Due to the different thicknesses of the second partitions 205, the battery pack shell can adjust the thicknesses of the second partitions 205 to divide the outflow section 202 in different forms to balance the flow rate and flow resistance of the fluid, further improving the temperature regulation effect of the battery pack shell.

[0049] Specifically, the outflow section 202 extends along the front-rear direction of the vehicle, and the multiple second partitions 205 can be arranged at intervals along the left-right direction of the vehicle, i.e., the Y1-Y2 direction shown in the figure. The number of the second partitions 205 can be four, dividing the outflow section 202 into five sub-outflow sections 2021.

[0050] Due to the temperature regulation of the first battery cell mounting space 101 by the upper cold plate 21 and the middle cold plate 22 and the temperature regulation of the second battery cell mounting space 102 by the middle cold plate 22 and the lower cold plate 23, in actual production and manufacturing, the thicknesses of the first partitions 204 and the second partitions 205 in each cold plate 20 can be adjusted according to the specific arrangement of the battery cells to change the flow rates of the upper cold plate 21, the middle cold plate 22, and the lower cold plate 23, so that the heat dissipation and heat preservation of the battery cells are more balanced.

[0051] The cold plate 20 protrudes forwardly towards the front of the vehicle to form a pair of lugs 24. One of the lugs 24 is used to set the inlet of the cavity flow channel 200, and the other is used to set the outlet of the cavity flow channel 200. The cold plate 20 can be extruded, and this setting further improves the structural strength of the cold plate 20. In other embodiments, the manufacturing process of the cold plate 20 is not limited, and the flow channel capable of forming a cavity structure inside can be used.

[0052] As shown in Figure 2 In an embodiment, the battery pack housing further comprises a pair of shared water pipes 30. One of the shared water pipes 30 is assembled to the water inlet 11. The other of the pair of shared water pipes 30 is assembled to the water outlet 12. At least two of the upper cold plate 21, the middle cold plate 22 and the lower cold plate 23 are connected to the shared water pipe 30.

[0053] Due to the provision of the shared water pipe 30, at least two of the upper cold plate 21, the middle cold plate 22 and the lower cold plate 23 can simultaneously flow in and out of the shared water pipe 30, improving the compactness of the battery pack housing and reducing the cost.

[0054] In an embodiment, in the height direction, the water inlet 11 and the water outlet 12 are located between the middle cold plate 22 and the lower cold plate 23. The pair of shared water pipes 30 respectively extend upward from the positions of the water inlet 11 and the water outlet 12 and are bent away from each other. The lower cold plate 23 is connected to the bottom 301 of the shared water pipe 30, and the upper cold plate 21 and the middle cold plate 22 are connected to the top 302 of the shared water pipe 30.

[0055] Due to the upward extension of the shared water pipe 30, the shared water pipe 30 is vertically arranged as a whole. Connecting the lower cold plate 23 to the bottom 301 of the shared water pipe 30 and connecting the middle cold plate 22 and the upper cold plate 21 to the top 302 of the shared water pipe 30 optimizes the layout of the water pipe and further improves the structural compactness of the battery pack housing.

[0056] Specifically, as shown in Figure 2 The upper cold plate 21 is welded with an upper water inlet connector 211 and an upper water outlet connector 212 on the lower surface. The middle cold plate 22 is welded with a middle water inlet connector 221 and a middle water outlet connector 222 on the upper surface. The lower cold plate 23 is welded with a lower water inlet connector 231 and a lower water outlet connector 232 on the upper surface.

[0057] Please refer to Figure 4 The pair of shared water pipes 30 are the same in structure and symmetrically arranged. Hereinafter, the shared water pipe 30 installed to the water inlet 11 is described as an example, and the shared water pipe 30 installed to the water outlet 12 is not described.

[0058] The common water pipe 30 can include a pipe body 31, an upper layer joint 32, a middle layer joint 33, and a lower layer joint 34. The upper layer joint 32 and the middle layer joint 33 are assembled to a top portion 302 of the common water pipe 30. The upper layer joint 32 is installed upward from the top portion 302 and is clamped to the upper layer water inlet joint 211. The middle layer joint 33 is installed downward from the top portion 302 and is clamped to the middle layer water inlet joint 221. The lower layer joint 34 is installed downward from a bottom portion 301 and is clamped to the lower layer water inlet joint 231. The upper layer joint 32, the middle layer joint 33, and the lower layer joint 34 can each be a plastic joint, and the specific type is not limited.

[0059] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structure described in the above embodiments and shown in the drawings; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A battery pack housing, characterized by, The battery pack shell comprises a shell and a plurality of cold plates assembled to the shell; the plurality of cold plates are arranged at intervals along a height direction of the battery pack shell, and an electric cell mounting space is formed between adjacent cold plates; the shell is provided with a water inlet and a water outlet; the cold plate is provided with a cavity flow channel which is communicated with the water inlet and the water outlet.

2. The battery pack housing of claim 1, wherein, The cold plate comprises an upper cold plate, a middle cold plate and a lower cold plate; the upper cold plate and the lower cold plate are oppositely arranged in the height direction; the middle cold plate is arranged between the upper cold plate and the lower cold plate to form a first electric cell mounting space and a second electric cell mounting space on both sides of the middle cold plate respectively.

3. The battery pack enclosure of claim 2, wherein, Further comprising a pair of shared water pipes; one of the pair of shared water pipes is assembled to the water inlet, and the other of the pair of shared water pipes is assembled to the water outlet; at least two of the upper cold plate, the middle cold plate and the lower cold plate are connected to the shared water pipes.

4. The battery pack enclosure of claim 3, wherein, In the height direction, the water inlet and the water outlet are located between the middle cold plate and the lower cold plate; the pair of shared water pipes respectively extend upward from the positions of the water inlet and the water outlet and are bent away from each other to form; The lower cold plate is connected to the bottom of the shared water pipe, and the upper cold plate and the middle cold plate are connected to the top of the shared water pipe.

5. The battery pack enclosure of claim 1, wherein, The cavity flow channel comprises a flow-in section and a flow-out section which are communicated with each other; the flow-in section is communicated with the water inlet, and the flow-out section is communicated with the water outlet; the extension directions of the flow-in section and the flow-out section are opposite.

6. The battery pack enclosure of claim 5, wherein, A first partition plate is arranged in the flow-in section; the first partition plate is arranged along the thickness direction of the cold plate to divide the flow-in section into a plurality of sub-flow-in sections; And / or, a second partition plate is arranged in the flow-out section; the second partition plate is arranged along the thickness direction of the cold plate to divide the flow-out section into a plurality of sub-flow-out sections.

7. The battery pack enclosure of claim 6, wherein, The number of the first partition plates is a plurality; in a direction perpendicular to the extension direction of the flow-in section, the plurality of first partition plates are arranged at intervals; the thicknesses of at least two first partition plates are different.

8. The battery pack enclosure of claim 6, wherein, The number of the second partition plates is a plurality; in a direction perpendicular to the extension direction of the flow-out section, the plurality of second partition plates are arranged at intervals; the thicknesses of at least two second partition plates are different.

9. The battery pack enclosure of claim 1, wherein, The cold plate is extruded.

10. A vehicle characterized by comprising: Comprise: An electric cell and the battery pack shell of any one of claims 1-9, the electric cell is mounted in the electric cell mounting space; The electric cell is in contact with adjacent cold plates on both sides in the height direction.

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