Battery pack case and battery pack

Abstract

This utility model relates to the field of battery pack technology, and discloses a battery pack housing and a battery pack. The battery pack housing includes: a liquid cooling plate, a frame, and a sprue adapter; the liquid cooling plate and the frame together enclose a receiving chamber; the frame includes a first frame located on one side of the frame along a second direction; the liquid cooling plate has a connecting port on one side along a third direction; the sprue adapter includes a cavity portion, a first tube portion, and a second tube portion; the cavity portion is connected to the first frame, the first tube portion extends from the cavity portion along a third direction and connects to the connecting port, and the second tube portion extends from the cavity portion along a second direction to the side of the first frame opposite to the receiving chamber. The battery pack housing provided by this utility model makes full use of the dimensional gaps within the battery pack, shortens the overall outer envelope length of the battery pack housing, and thus increases the energy density of the battery pack while meeting installation dimensions; at the same time, it ensures the structural safety of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a battery pack housing and a battery pack. Background Technology

[0002] With the rapid development of the power battery pack industry, battery pack manufacturers are increasingly demanding higher standards for battery pack safety and energy density. Besides the safety and performance of the battery cells themselves, the battery casing, as a crucial load-bearing structure, is also receiving significant attention from manufacturers. Currently, conventional aluminum profile casings cannot be made in a small size due to the installation dimensions required by the vehicle frame and limitations in processing technology. Therefore, ensuring high energy density and strong battery pack structural safety while meeting installation size requirements has become a key design and development challenge for manufacturers. Utility Model Content

[0003] In view of this, the present invention provides a battery pack housing and a battery pack to solve the problem of how to ensure high energy density and strong battery pack structural safety while meeting installation size requirements.

[0004] In a first aspect, the present invention provides a battery pack housing having a first direction, a second direction and a third direction intersecting each other, including: a liquid cooling plate, a frame and a water inlet adapter; The liquid cooling plate is located on one side of the frame along a third direction; the liquid cooling plate and the frame together enclose the receiving compartment; The frame includes a first border, which is located on one side of the frame along a second direction; The liquid cooling plate has a connecting port on the side facing the receiving chamber along the third direction, and the connecting port is located on the side of the liquid cooling plate close to the first frame along the second direction. The sprue adapter includes a cavity, a first tube body, and a second tube body. The cavity is connected to a first frame. The first tube body extends from the cavity along a third direction and is connected to the communication port. The second tube body extends from the cavity along a second direction to the side of the first frame away from the receiving chamber.

[0005] Beneficial Effects: The battery pack housing provided by this utility model, by providing a connecting port on the liquid cooling plate, allows coolant to be introduced into and drawn out of the liquid cooling plate through the connecting port. The water inlet adapter includes a cavity portion, a first tube portion, and a second tube portion. The first tube portion extends from the cavity portion along a third direction Z and connects to the connecting port. The second tube portion extends from the cavity portion along a second direction Y to the side of the first frame away from the receiving compartment. The cavity portion, the first tube portion, and the second tube portion form an "L" shape structure, thereby changing the coolant outlet direction and realizing the change from the traditional parallel direction to the liquid cooling plate. The liquid outlet method, from the direction of the first frame to the direction perpendicular to the first frame, fully utilizes the dimensional gaps within the battery pack while ensuring that the length of the battery pack housing along the second direction Y remains unchanged. This enables the connection between the input and output of the liquid cooling plate and the liquid cooling plate. Simultaneously, the connection between the first tube and the liquid cooling plate is achieved inside the battery pack housing, shortening the overall outer envelope length of the battery pack housing. This, in turn, increases the energy density of the battery pack while meeting the installation dimensions. Furthermore, the cavity section, by connecting to the first frame, enhances the support strength of the first frame, thereby ensuring the structural safety of the battery pack.

[0006] In one alternative embodiment, the first tube body is inserted into the communication port along a third direction, and the cavity part is attached to the liquid cooling plate along a third direction on the side facing the liquid cooling plate, and a first weld is formed at the junction of the cavity part and the liquid cooling plate.

[0007] Beneficial effects: By inserting the first tube into the connecting port, the first tube of the water inlet adapter can be positioned and installed, and a first weld is formed at the junction of the cavity and the liquid cooling plate, thereby ensuring the sealing and connection strength between the first tube and the liquid cooling plate, preventing leakage of the battery pack liquid cooling system. At the same time, the connection between the first tube and the liquid cooling plate is realized inside the battery pack housing, shortening the outer envelope length of the entire battery pack housing, thereby increasing the energy density of the battery pack while meeting the installation dimensions.

[0008] In one alternative embodiment, the first frame has an opening facing the liquid cooling plate; the cavity is built into the opening; and a second weld is formed at the junction of the cavity and the first frame.

[0009] Beneficial effects: By embedding the cavity into the opening of the first frame and forming a second weld at the junction of the cavity and the first frame, the sealing performance and overall support strength of the first frame are guaranteed. At the same time, the overall structural strength of the cavity is improved, and leakage problems such as deformation and damage of the sprue connector are avoided in the battery pack under long-term working conditions.

[0010] In one optional embodiment, the first frame is further provided with a clearance portion, which is located on the side of the opening window facing the liquid cooling plate in a third direction. The clearance portion is set at an angle to the liquid cooling plate and is located at the junction of the first weld and the second weld.

[0011] Beneficial effects: In the manufacturing process, the first weld is formed at the junction of the cavity and the liquid cooling plate, so that the gate adapter and the liquid cooling plate are welded to form an integral structure. Then, it is welded to the first frame, and a second weld is formed at the junction of the cavity and the first frame. During this process, due to the existence of the avoidance part on the first frame, the angle of the avoidance weld is formed, which avoids the welding installation interference between the second weld and the first weld, avoids the generation of pores during the welding process, and ensures the sealing of the entire battery pack.

[0012] In one optional embodiment, the frame further includes a second border and two third borders, the second border being disposed opposite to the first border along a second direction, and the two third borders being disposed opposite to each other along a first direction, the first border, the second border, and the two third borders being connected end to end in sequence to form the frame; The battery pack housing also includes a first mounting beam and a second mounting beam, both of which are located within the housing compartment; The first mounting beam is welded to the liquid cooling plate; the second mounting beam and the second frame are integrally formed.

[0013] Beneficial effects: By setting the first mounting beam and the second mounting beam, the battery module is fixed by the first mounting beam and the second mounting beam; the second mounting beam and the second frame form an integral structure, which reduces the number of welding parts of the battery pack box, while also ensuring the structural strength of the second frame and the second mounting beam.

[0014] In one alternative embodiment, the third frame includes a fixing beam disposed on the side of the third frame near the liquid cooling plate along a third direction, the fixing beam extending along a second direction, and the fixing beam being used to connect the battery pack housing to the vehicle frame. The fixed beam has mounting holes along the third direction for installing fasteners, which are used to connect the fixed beam to the frame. The third frame also has a bevel, which is set at an angle to the fixed beam and is used to avoid the fasteners.

[0015] Beneficial effects: The mounting holes are integrated on the fixing beam of the third frame. While ensuring the width of the battery pack housing along the first direction X, the inclined surface is set on the third frame at an angle to the fixing beam, thereby avoiding the installation of fasteners and facilitating the assembly between the battery pack and the vehicle frame.

[0016] In one optional embodiment, the third frame is further provided with a lifting lug and a supporting rib. The lifting lug is disposed on the side of the third frame opposite to the receiving compartment along the first direction, and the supporting rib connects the lifting lug and the inclined surface; and / or, The fixed beam has a protrusion on the side near the liquid cooling plate along the first direction; the liquid cooling plate has a first recess on the side facing the fixed beam along the first direction; the protrusion is inserted into the first recess; the fixed beam is welded to the liquid cooling plate; and / or, The fixed beam is at least partially hollow inside, forming weight-reducing holes.

[0017] Beneficial effects: By setting lifting lugs on the third frame, the lifting lugs can be used for subsequent battery pack transfer and hoisting; by forming a "triangular support structure" between the lifting lugs and the inclined surface, the supporting ribs provide stable support for the battery pack hoisting. During the assembly of the battery pack housing, the protrusion is inserted into the first recess, which facilitates the installation and positioning between the liquid cooling plate and the fixed beam, and at the same time provides strong support for the welding between the fixed beam and the liquid cooling plate, thereby improving the welding strength. While ensuring the overall frame strength, it greatly improves the support strength of the battery pack housing when subjected to lateral compression and side impact.

[0018] In one alternative embodiment, the fixed beam includes a first stepped portion and a second stepped portion; a protrusion is disposed on the side of the first stepped portion close to the liquid cooling plate along a first direction; The second step, along the first direction, forms a receiving groove together with the side of the liquid cooling plate facing away from the receiving compartment; the battery pack box also includes an insulation layer, which is built into the receiving groove. The dimension of the second step portion along the first direction is smaller than the dimension of the first step portion along the first direction; a second recess is formed between the second step portion and the first step portion, and the second recess is used to accommodate at least part of the insulation layer.

[0019] Beneficial effects: The fixed beam is provided with a first step and a second step, and the side of the second step close to the liquid cooling plate along the first direction X and the side of the liquid cooling plate away from the receiving chamber together form a receiving groove, thereby embedding the insulation layer in the receiving groove, which facilitates the forming of the insulation layer and plays a role in heat preservation for the battery pack; a second recess is formed between the second step and the first step, and at least part of the insulation layer extends into the second recess, which helps to improve the heat preservation effect of the insulation layer.

[0020] In one optional embodiment, the liquid cooling plate includes a first liquid cooling block and a second liquid cooling block, the first liquid cooling block and the second liquid cooling block being connected along a first direction; The liquid cooling plate also includes a first sealing member and a second sealing member. The first sealing member is disposed on the side of the first liquid cooling block and the second liquid cooling block along the second direction near the first frame. The second sealing member is disposed on the side of the first liquid cooling block and the second liquid cooling block along the second direction near the second frame. The first sealing member and the second sealing member are used to seal the first liquid cooling block and the second liquid cooling block.

[0021] Beneficial effects: The liquid cooling plate is made by splicing the first liquid cooling block and the second liquid cooling block, and by sealing the first liquid cooling block and the second liquid cooling block with the first sealing part and the second sealing part. This can reduce the mold manufacturing cost of the liquid cooling plate and at the same time ensure the process qualification rate.

[0022] Secondly, this utility model also provides a battery pack, including: a battery module, and a battery pack housing as described above; the battery module is built into the housing compartment.

[0023] Beneficial effects: The battery pack of the second aspect includes the battery pack housing of the first aspect, therefore, the battery pack of the second aspect includes all the beneficial effects of the battery pack housing of the first aspect. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a perspective view of a battery pack housing according to an embodiment of the present utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 for Figure 1 The top view of the battery pack housing shown; Figure 4 for Figure 1 The front view of the battery pack housing shown; Figure 5 for Figure 4 A magnified view of a portion of point C in the middle; Figure 6 for Figure 4 The image shows a front view of the battery pack housing after the insulation layer has been concealed. Figure 7 for Figure 4 Sectional view of section BB; Figure 8 for Figure 7 A magnified view of a portion of point D in the middle; Figure 9 This is an exploded view of the liquid cooling plate of a battery pack housing according to an embodiment of the present invention; Figure 10 for Figure 3 A top view of the liquid cooling plate of the battery pack housing shown; Figure 11 for Figure 10 A sectional view of section EE; Figure 12 for Figure 11 A magnified view of a portion of point F in the middle; Figure 13 This is a perspective view of the first frame of a battery pack housing according to an embodiment of the present utility model; Figure 14 for Figure 13 A magnified view of a portion of point G in the middle; Figure 15 This is a perspective view of the third frame of a battery pack housing according to an embodiment of the present utility model; Figure 16 for Figure 15 The side view of the third border shown; Figure 17 for Figure 16 A sectional view of section HH in the middle; Figure 18 This is a perspective view of a water inlet adapter for a battery pack housing according to an embodiment of the present utility model; Figure 19 for Figure 18 The bottom view of the sprue adapter shown; Figure 20 for Figure 19 Sectional view of section II.

[0026] Explanation of reference numerals in the attached figures: 10. Liquid cooling plate; 100. Connecting port; 101. First recess; 102. Receiving groove; 103. Cooling channel; 11. First liquid cooling block; 12. Second liquid cooling block; 13. First sealing element; 14. Second sealing element; 20. Frame; 200. Storage compartment; 21. First side frame; 211. Window opening; 212. Clearance section; 22. Second side frame; 23. Third side frame; 231. Fixing beam; 2310. Mounting hole; 2311. First step section; 2312. Second step section; 2313. Second recessed section; 2314. Weight reduction hole; 232. Sloping surface; 233. Lifting lug; 234. Supporting rib; 235. Protrusion; 30. Sprue connector; 31. Cavity section; 32. First tube body section; 33. Second tube body section; 41. First weld; 42. Second weld; 51. First mounting beam; 52. Second mounting beam; 60. Insulation layer; X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In related technologies, the battery pack housing is the main load-bearing device for the battery pack. The battery pack housing houses the power batteries and serves as a protective layer. Externally, it connects to the vehicle frame, acting as the link between the battery pack and the frame. Currently, due to limitations in processing and structure, the overall length and width of aluminum profile housings in the industry are primarily determined by the dimensions of the liquid cooling nozzles and the side frame design. Typically, the liquid cooling nozzles are located on the outside of the housing, extending from above the liquid cooling plate on the front side. The side frame, needing mounting holes for connection to the vehicle frame, extends outwards in width to accommodate these mounting positions. This results in a larger overall length and width, increased weight, and decreased battery pack energy density, making it difficult to achieve lightweight battery pack design.

[0029] The following is combined with Figures 1 to 20 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, a battery pack housing is provided, having a first direction X, a second direction Y and a third direction Z intersecting in pairs, including: a liquid cooling plate 10, a frame 20 and a water inlet adapter 30; Please see Figure 1 As shown, the liquid cooling plate 10 is disposed on one side of the frame 20 along the third direction Z; the liquid cooling plate 10 and the frame 20 together enclose the receiving chamber 200; Please combine them together Figure 3 As shown, the frame 20 includes a first border 21, which is located on one side of the frame 20 along the second direction Y. Please combine them together Figure 9 and Figure 10 As shown, the liquid cooling plate 10 has a connecting port 100 on the side of the receiving chamber 200 along the third direction Z. The connecting port 100 is located on the side of the liquid cooling plate 10 near the first frame 21 along the second direction Y. Please combine them together Figure 18 and Figure 20 As shown, the sprue adapter 30 includes a cavity portion 31, a first tube body portion 32, and a second tube body portion 33. Please refer to [link / reference]. Figure 5 As shown, the cavity portion 31 is connected to the first frame 21. Please refer to [link / reference]. Figure 8 As shown, the first tube body 32 extends from the cavity part 31 along the third direction Z and is connected to the communication port 100, and the second tube body 33 extends from the cavity part 31 along the second direction Y to the side of the first frame 21 away from the receiving chamber 200.

[0031] Further, please see Figure 8 As shown, the liquid cooling plate 10 is hollow inside and forms a cooling channel 103, which is used for the flow of coolant; the connecting port 100 is connected to the cooling channel 103.

[0032] The battery pack housing provided by this utility model has a connecting port 100 on the liquid cooling plate 10, through which coolant is introduced into and drawn out of the liquid cooling plate 10. The water inlet adapter 30 includes a cavity portion 31, a first tube portion 32, and a second tube portion 33. The first tube portion 32 extends from the cavity portion 31 along a third direction Z and connects to the connecting port 100. The second tube portion 33 extends from the cavity portion 31 along a second direction Y to the side of the first frame 21 opposite to the receiving compartment 200. The cavity portion 31, the first tube portion 32, and the second tube portion 33 form an "L" shape structure, thereby changing the coolant outlet direction and realizing... The coolant outlet direction has been changed from the traditional parallel direction to the first frame 21 to the perpendicular direction to the first frame 21. While ensuring that the length dimension of the battery pack housing along the second direction Y remains unchanged, the internal length gap of the battery pack is fully utilized to realize the connection between the coolant input and output of the liquid cooling plate 10. At the same time, the connection between the first tube part 32 and the liquid cooling plate 10 is realized inside the battery pack housing, shortening the outer envelope length of the entire battery pack housing, thereby increasing the energy density of the battery pack while meeting the installation dimensions. The cavity part 31 is connected to the first frame 21, which improves the support strength of the first frame 21, thereby ensuring the structural safety of the battery pack.

[0033] Furthermore, the coolant outlet 30 allows for coolant to exit in any direction, providing greater operability for coolant water circuit connections.

[0034] In some embodiments, see Figure 8 As shown, the first tube body 32 is inserted into the communication port 100 along the third direction Z. Please refer to [link / reference]. Figure 5As shown, the cavity portion 31 is attached to the liquid cooling plate 10 along the third direction Z and the side facing the liquid cooling plate 10. A first weld 41 is formed at the junction of the cavity portion 31 and the liquid cooling plate 10. The first weld 41 is arranged around the peripheral edge of the cavity portion 31.

[0035] By inserting the first tube portion 32 into the connecting port 100, the first tube portion 32 of the water inlet adapter 30 is positioned and installed, and a first weld 41 is formed at the junction of the cavity portion 31 and the liquid cooling plate 10, thereby ensuring the sealing and connection strength between the first tube portion 32 and the liquid cooling plate 10, preventing leakage of the battery pack liquid cooling system. At the same time, the connection between the first tube portion 32 and the liquid cooling plate 10 is realized inside the battery pack housing, shortening the outer envelope length of the entire battery pack housing, thereby increasing the energy density of the battery pack while meeting the installation dimensions.

[0036] Furthermore, the dimension of the first tube body 32 along the third direction Z is less than or equal to 2.5 mm.

[0037] Furthermore, a quick-connect interface (not shown) can be used in the second tube section 33 as the main outlet for the entire liquid cooling pipeline, making it more convenient to install the pipeline in the vehicle.

[0038] In some embodiments, see Figure 13 As shown, the first frame 21 has an opening 211 facing the liquid cooling plate 10; please refer to the diagram. Figure 5 As shown, the cavity 31 is built into the opening window 211; the junction of the cavity 31 and the first frame 21 forms a second weld 42.

[0039] By embedding the cavity 31 inside the opening 211 of the first frame 21 and forming a second weld 42 at the junction of the cavity 31 and the first frame 21, the sealing performance and overall support strength of the first frame 21 are guaranteed, while the overall structural strength of the cavity 31 is improved, and leakage problems such as deformation and damage of the sprue adapter 30 are avoided in the long-term operation of the battery pack.

[0040] In some embodiments, please combine Figure 5 and Figure 14 As shown, the first frame 21 is also provided with a clearance part 212. The clearance part 212 is located on the side of the opening window 211 facing the liquid cooling plate 10 along the third direction Z. The clearance part 212 is set at an angle to the liquid cooling plate 10. The clearance part 212 is located at the junction of the first weld 41 and the second weld 42.

[0041] It should be noted that during the manufacturing process, firstly, a first weld 41 is formed at the junction of the cavity 31 and the liquid cooling plate 10, so that the gate adapter 30 and the liquid cooling plate 10 are welded to form an integral structure. Then, it is welded to the first frame 21, and a second weld 42 is formed at the junction of the cavity 31 and the first frame 21. During this process, due to the presence of the avoidance part 212 on the first frame 21, an angle of avoidance weld is formed, which avoids welding installation interference between the second weld 42 and the first weld 41, avoids the generation of pores during the welding process, and ensures the sealing of the entire battery pack.

[0042] In some embodiments, see Figure 3 As shown, the frame 20 also includes a second border 22 and two third borders 23. The second border 22 is positioned opposite to the first border 21 along the second direction Y, and the two third borders 23 are positioned opposite to each other along the first direction X. The first border 21, the second border 22 and the two third borders 23 are connected end to end to form the frame 20. The battery pack housing also includes a first mounting beam 51 and a second mounting beam 52, both of which are located within the receiving compartment 200; The first mounting beam 51 is welded to the liquid cooling plate 10; the second mounting beam 52 and the second frame 22 are integrally formed.

[0043] By setting the first mounting beam 51 and the second mounting beam 52, the battery module is fixed by the first mounting beam 51 and the second mounting beam 52; the second mounting beam 52 and the second frame 22 form an integral structure, which reduces the number of welding parts of the battery pack box, and also ensures the structural strength of the second frame 22 and the second mounting beam 52.

[0044] Furthermore, the first mounting beam 51 is welded to the liquid cooling plate 10 by arc welding.

[0045] Furthermore, the second mounting beam 52 and the second frame 22 can be extruded together using aluminum extrusion profiles.

[0046] In some embodiments, see Figure 15 As shown, the third frame 23 includes a fixing beam 231, which is disposed on the side of the third frame 23 close to the liquid cooling plate 10 along the third direction Z. The fixing beam 231 extends along the second direction Y and is used to connect the battery pack box to the vehicle frame. The fixed beam 231 has mounting holes 2310 along the third direction Z. Fasteners are installed in the mounting holes 2310 to connect the fixed beam 231 to the vehicle frame. (See also...) Figure 17 As shown, the third frame 23 is also provided with a slope 232, which is set at an angle to the fixed beam 231. The slope 232 is used to avoid fasteners.

[0047] Mounting holes 2310 are integrated on the fixing beam 231 of the third frame 23. While ensuring the width of the battery pack housing along the first direction X, a slope 232 is set on the third frame 23 so that the slope 232 is set at an angle to the fixing beam 231, thereby avoiding the installation of fasteners and facilitating the assembly between the battery pack and the vehicle frame.

[0048] Furthermore, the third frame 23 is an integrally formed structure, and the third frame 23 can be extruded together using the aluminum extrusion profile process.

[0049] In some embodiments, see Figure 15 and Figure 17 As shown, the third frame 23 is also provided with a lifting lug 233 and a support rib 234. The lifting lug 233 is located on the side of the third frame 23 away from the receiving compartment 200 along the first direction X, and the support rib 234 is connected between the lifting lug 233 and the inclined surface 232.

[0050] By setting lifting lugs 233 on the third frame 23, the lifting lugs 233 can be used for subsequent battery pack transfer and hoisting; by forming a "triangular support structure" support rib 234 between the lifting lugs 233 and the inclined surface 232, the battery pack hoisting is stably supported.

[0051] In some embodiments, see Figure 17 As shown, the fixed beam 231 has a protrusion 235 on the side of the liquid cooling plate 10 along the first direction X. Please combine them together Figure 11 and Figure 12 As shown, the liquid cooling plate 10 has a first recess 101 on the side facing the fixed beam 231 along the first direction X; the protrusion 235 is inserted into the first recess 101; the fixed beam 231 is welded to the liquid cooling plate 10.

[0052] During the assembly of the battery pack housing, the protrusion 235 is inserted into the first recess 101, which facilitates the installation and positioning between the liquid cooling plate 10 and the fixed beam 231, and provides strong support for the welding between the fixed beam 231 and the liquid cooling plate 10, thereby improving the welding strength.

[0053] Furthermore, the fixed beam 231 and the liquid cooling plate 10 can be welded together by friction stir welding.

[0054] In some embodiments, see Figure 17 As shown, the fixed beam 231 includes a first stepped portion 2311 and a second stepped portion 2312; the protrusion 235 is disposed on the side of the first stepped portion 2311 close to the liquid cooling plate 10 along the first direction X; Please combine them together Figure 6As shown, the second step portion 2312, along the first direction X, near the liquid cooling plate 10, together with the side of the liquid cooling plate 10 away from the receiving chamber 200, forms the receiving groove 102; please refer to this diagram. Figure 4 As shown, the battery pack housing also includes an insulation layer 60, which is built into the receiving groove 102. See also Figure 17 As shown, the dimension of the second step portion 2312 along the first direction X is smaller than the dimension of the first step portion 2311 along the first direction X; a second recess 2313 is formed between the second step portion 2312 and the first step portion 2311, and the second recess 2313 is used to accommodate at least part of the insulation layer 60.

[0055] The fixed beam 231 is provided with a first step portion 2311 and a second step portion 2312, and the second step portion 2312 along the first direction X, close to the liquid cooling plate 10, together with the side of the liquid cooling plate 10 away from the receiving chamber 200, forms a receiving groove 102, thereby embedding the insulation layer 60 inside the receiving groove 102, which facilitates the forming of the insulation layer 60 and plays a role in heat preservation for the battery pack; a second recess 2313 is formed between the second step portion 2312 and the first step portion 2311, and at least part of the insulation layer 60 extends into the second recess 2313, which helps to improve the heat preservation effect of the insulation layer 60.

[0056] Furthermore, the depth of the second recess 2313 along the third direction Z is less than or equal to 3 mm.

[0057] Furthermore, the second recess 2313 is directly formed during the aluminum extrusion of the third frame 23, eliminating the need to add other structural components to the battery pack and having no impact on the structural strength of the battery pack housing itself.

[0058] In some embodiments, see Figure 17 As shown, the fixed beam 231 is at least partially hollow inside and forms a weight-reducing hole 2314, thereby greatly improving the support strength of the battery pack box when subjected to lateral compression and side impact while ensuring the overall frame strength.

[0059] In some embodiments, see Figure 9 As shown, the liquid cooling plate 10 includes a first liquid cooling block 11 and a second liquid cooling block 12, and the first liquid cooling block 11 and the second liquid cooling block 12 are connected along the first direction X. The liquid cooling plate 10 also includes a first sealing member 13 and a second sealing member 14. The first sealing member 13 is disposed on the side of the first liquid cooling block 11 and the second liquid cooling block 12 along the second direction Y close to the first frame 21. The second sealing member 14 is disposed on the side of the first liquid cooling block 11 and the second liquid cooling block 12 along the second direction Y close to the second frame 22. The first sealing member 13 and the second sealing member 14 are used to seal the first liquid cooling block 11 and the second liquid cooling block 12.

[0060] The liquid cooling plate 10 is spliced ​​together with the first liquid cooling block 11 and the second liquid cooling block 12, and the first liquid cooling block 11 and the second liquid cooling block 12 are sealed by the first sealing member 13 and the second sealing member 14. This can reduce the mold manufacturing cost of the liquid cooling plate 10 and ensure the process qualification rate.

[0061] Furthermore, the first liquid cooling block 11 and the second liquid cooling block 12 are welded together, and the first sealing component 13 and the second sealing component 14 are connected to the first liquid cooling block 11 and the second liquid cooling block 12 by friction stir welding and supplementary arc welding.

[0062] According to an embodiment of the present invention, another aspect provides a battery pack, including: a battery module, and a battery pack housing as described above; the battery module is built into a receiving compartment 200.

[0063] The battery pack in this embodiment includes the battery pack housing described above. Therefore, the battery pack in this embodiment includes all the beneficial effects of the battery pack housing described above.

[0064] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack housing having intersecting first direction (X), second direction (Y), and third direction (Z), characterized in that, include: Liquid cooling plate (10), frame (20) and nozzle adapter (30); The liquid cooling plate (10) is disposed on one side of the frame (20) along the third direction (Z); the liquid cooling plate (10) and the frame (20) together enclose the receiving compartment (200). The frame (20) includes a first border (21) located on one side of the frame (20) along the second direction (Y); The liquid cooling plate (10) has a communication port (100) on the side facing the receiving chamber (200) along the third direction (Z), and the communication port (100) is located on the side of the liquid cooling plate (10) close to the first frame (21) along the second direction (Y); The sprue adapter (30) includes a cavity portion (31), a first tube portion (32), and a second tube portion (33). The cavity portion (31) is connected to the first frame (21). The first tube portion (32) extends from the cavity portion (31) along the third direction (Z) and is connected to the communication port (100). The second tube portion (33) extends from the cavity portion (31) along the second direction (Y) to the side of the first frame (21) away from the receiving chamber (200).

2. The battery pack housing according to claim 1, characterized in that, The first tube body (32) is inserted into the communication port (100) along the third direction (Z), and the cavity part (31) is attached to the liquid cooling plate (10) on the side facing the liquid cooling plate (10) along the third direction (Z), and a first weld (41) is formed at the junction of the cavity part (31) and the liquid cooling plate (10).

3. The battery pack housing according to claim 2, characterized in that, The first frame (21) is provided with an opening (211) facing the liquid cooling plate (10); the cavity (31) is built into the opening (211); a second weld (42) is formed at the junction of the cavity (31) and the first frame (21).

4. The battery pack housing according to claim 3, characterized in that, The first frame (21) is also provided with a clearance part (212), which is located on the side of the opening window (211) facing the liquid cooling plate (10) along the third direction (Z). The clearance part (212) is set at an angle to the liquid cooling plate (10) and is located at the junction of the first weld (41) and the second weld (42).

5. The battery pack housing according to any one of claims 1 to 4, characterized in that, The frame (20) further includes a second border (22) and two third borders (23). The second border (22) is arranged opposite to the first border (21) along the second direction (Y), and the two third borders (23) are arranged opposite to each other along the first direction (X). The first border (21), the second border (22) and the two third borders (23) are connected end to end to form the frame (20). The battery pack housing also includes a first mounting beam (51) and a second mounting beam (52), both of which are located within the receiving compartment (200). The first mounting beam (51) is welded to the liquid cooling plate (10); the second mounting beam (52) and the second frame (22) are integrally formed.

6. The battery pack housing according to claim 5, characterized in that, The third frame (23) includes a fixing beam (231), which is disposed on the side of the third frame (23) close to the liquid cooling plate (10) along the third direction (Z). The fixing beam (231) extends along the second direction (Y) and is used to connect the battery pack box to the vehicle frame. The fixed beam (231) is provided with mounting holes (2310) along the third direction (Z). The mounting holes (2310) are used to install fasteners, which are used to connect the fixed beam (231) to the vehicle frame. The third frame (23) is also provided with a slope (232), which is set at an angle to the fixed beam (231). The slope (232) is used to avoid the fasteners.

7. The battery pack housing according to claim 6, characterized in that, The third frame (23) is further provided with a lifting lug (233) and a supporting rib (234). The lifting lug (233) is located on the side of the third frame (23) facing away from the receiving compartment (200) along the first direction (X). The supporting rib (234) is connected between the lifting lug (233) and the inclined surface (232); and / or, The fixed beam (231) has a protrusion (235) on the side of the liquid cooling plate (10) along the first direction (X); the liquid cooling plate (10) has a first recess (101) on the side of the fixed beam (231) along the first direction (X); the protrusion (235) is inserted into the first recess (101); the fixed beam (231) is welded to the liquid cooling plate (10); and / or, The fixed beam (231) is at least partially hollow inside and forms a weight-reducing hole (2314).

8. The battery pack housing according to claim 7, characterized in that, The fixed beam (231) includes a first stepped portion (2311) and a second stepped portion (2312); the protrusion (235) is disposed on the side of the first stepped portion (2311) along the first direction (X) close to the liquid cooling plate (10); The second step portion (2312) along the first direction (X) near the liquid cooling plate (10) and the side of the liquid cooling plate (10) away from the receiving chamber (200) together form a receiving groove (102); the battery pack box also includes a heat insulation layer (60), which is built into the receiving groove (102); The second step portion (2312) is smaller in size along the first direction (X) than the first step portion (2311) along the first direction (X); a second recess (2313) is formed between the second step portion (2312) and the first step portion (2311), and the second recess (2313) is used to accommodate at least a portion of the insulation layer (60).

9. The battery pack enclosure of claim 5, wherein, The liquid cooling plate (10) includes a first liquid cooling block (11) and a second liquid cooling block (12), wherein the first liquid cooling block (11) and the second liquid cooling block (12) are connected along the first direction (X); The liquid cooling plate (10) further includes a first sealing member (13) and a second sealing member (14). The first sealing member (13) is disposed on the side of the first liquid cooling block (11) and the second liquid cooling block (12) along the second direction (Y) close to the first frame (21). The second sealing member (14) is disposed on the side of the first liquid cooling block (11) and the second liquid cooling block (12) along the second direction (Y) close to the second frame (22). The first sealing member (13) and the second sealing member (14) are used to seal the first liquid cooling block (11) and the second liquid cooling block (12).

10. A battery pack, characterized in that, include: Battery module, and battery pack housing as described in any one of claims 1 to 9 above; The battery module is built into the housing (200).

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