Battery housing and battery pack

Abstract

This application discloses a battery housing and battery pack, belonging to the field of vehicle battery technology. The battery housing includes a frame, a liquid cooling plate, and a bottom protective plate. The bottom protective plate includes a bottom plate body and connecting portions distributed around the bottom plate body. The connecting portions are fixedly connected to the outer edge of the bottom plate body and are closer to the liquid cooling plate than to the bottom plate body, and are connected to the edge portion of the liquid cooling plate. The connecting portions, the bottom plate body, and the liquid cooling plate form a cavity, and the bottom plate body has multiple through holes communicating with the cavity. This application provides multiple through holes for drainage in the bottom plate body of the bottom protective plate, thus eliminating the need for sealing between the liquid cooling plate and the bottom protective plate. During driving on flooded roads, the through holes can drain water promptly. Therefore, the battery housing can save on the cost of sealing between the liquid cooling plate and the bottom protective plate, reduce redundant sealing design, and ensure effective drainage.

Description

Technical Field

[0001] This application relates to the field of vehicle battery technology, and in particular to a battery housing and battery pack. Background Technology

[0002] With the development of battery technology, the use of battery packs as energy supply systems in new energy vehicles is becoming increasingly widespread. Battery packs are generally installed at the bottom of the vehicle body and include battery modules and a battery housing. The battery housing includes a liquid cooling plate and a bottom protective plate. The bottom protective plate primarily protects the liquid cooling plate, and existing battery housings use a sealing treatment between the bottom protective plate and the liquid cooling plate.

[0003] Currently, the seal between the bottom protective plate and the liquid cooling plate can only be tested in battery pack or battery housing prototypes; there is no way to test the seal between the bottom protective plate and the liquid cooling plate in finished battery packs or battery housings. This increases the cost of sealing-related processes for battery packs or battery housings, but the sealing cannot be tested when requested. Utility Model Content

[0004] This application provides a battery housing and a battery pack. It solves the cost problem of sealing between the bottom protective plate and the liquid cooling plate in existing battery packs or battery housings. The technical solution is as follows:

[0005] On the one hand, a battery housing is provided, including: a frame, a liquid cooling plate, and a bottom protective plate;

[0006] The frame is located on one side of the liquid cooling plate and is connected to the edge portion of the liquid cooling plate;

[0007] The bottom protective plate is located on the side of the liquid cooling plate away from the frame; the bottom protective plate includes: a bottom plate body and a connecting part distributed around the bottom plate body, the connecting part is fixedly connected to the outer edge of the bottom plate body, the connecting part is closer to the liquid cooling plate than to the bottom plate body, and the connecting part is connected to the edge portion of the liquid cooling plate;

[0008] The connecting part, the base plate body, and the liquid cooling plate are used to form a cavity, and the base plate body has a plurality of through holes communicating with the cavity.

[0009] Optionally, the base plate body has multiple shaped surfaces on the side facing the liquid cooling plate, and in a first direction perpendicular to the liquid cooling plate, the distances between different shaped surfaces and the side of the liquid cooling plate away from the base plate are different.

[0010] Among the plurality of molding surfaces, the molding surface furthest from the side of the liquid cooling plate opposite to the bottom protective plate is the first molding surface, and the first molding surface has at least a portion of the through holes.

[0011] Optionally, the base plate body has a support structure on the side facing the liquid cooling plate, and the support structure is connected to the liquid cooling plate; the plurality of molding surfaces further includes a second molding surface, which is located on the side of the support structure facing the liquid cooling plate;

[0012] Wherein, at least some of the through holes are distributed around the support structure; in the first direction, the distance between the first molded surface and the side of the liquid cooling plate opposite to the bottom protective plate is greater than the distance between the second molded surface and the side of the liquid cooling plate opposite to the bottom protective plate.

[0013] Optionally, a third forming surface may also exist among the plurality of forming surfaces; in the first direction, the distance between the third forming surface and the side of the liquid cooling plate away from the bottom protective plate is less than the distance between the first forming surface and the side of the liquid cooling plate away from the bottom protective plate, and is greater than or equal to the distance between the second forming surface and the side of the liquid cooling plate away from the bottom protective plate.

[0014] The second molding surface and the third molding surface are used to divide the base plate body into a plurality of separately arranged sub-regions, at least some of the sub-regions are distributed around the support structure; the first molding surface is distributed in each of the sub-regions; and the through holes are distributed in at least some of the sub-regions.

[0015] Optionally, the support structure includes: a plurality of support longitudinal beams arranged in a second direction, the support longitudinal beams extending along a third direction; the second direction intersects with the third direction, and both the second direction and the third direction intersect with the first direction;

[0016] In the second direction, the plurality of through holes are arranged in multiple rows, and each of the supporting longitudinal beams has at least one row of through holes distributed around its periphery.

[0017] Optionally, the plurality of supporting longitudinal beams include: a first supporting longitudinal beam and a second supporting longitudinal beam, and at least one third supporting longitudinal beam located between the first supporting longitudinal beam and the second supporting longitudinal beam;

[0018] The first supporting longitudinal beam has a row of through holes on one side facing the second supporting longitudinal beam; the second supporting longitudinal beam has a row of through holes on one side facing the first supporting longitudinal beam; and each of the third supporting longitudinal beams has a row of through holes on both sides.

[0019] Optionally, the support structure further includes: at least one support beam extending along the second direction and connected to each of the support longitudinal beams; the at least one support beam and the plurality of support longitudinal beams can divide the cavity into multiple partitions;

[0020] The battery enclosure further includes multiple buffer layers corresponding to the multiple partitions, with each buffer layer located within its corresponding partition.

[0021] Optionally, the through hole is strip-shaped and extends along the second direction.

[0022] Optionally, the battery housing further includes: a plurality of locking components, wherein the connecting portion is connected to the edge portion of the liquid cooling plate through the plurality of locking components;

[0023] The connecting part has a gap between itself and the liquid cooling plate on the side facing the liquid cooling plate, and the gap communicates with the cavity.

[0024] On the other hand, a battery pack is provided, including: a battery module and a battery housing, wherein the battery housing is the battery housing according to any of the above claims;

[0025] The battery box frame and liquid cooling plate are used to form a battery compartment, and the battery module is located inside the battery compartment.

[0026] The beneficial effects of the technical solutions provided in this application are:

[0027] By incorporating multiple through-holes for drainage within the base plate of the bottom guard plate, sealing between the liquid cooling plate and the bottom guard plate is unnecessary. During driving through flooded areas, the through-holes allow for timely drainage. Consequently, the battery housing saves on the cost of sealing between the liquid cooling plate and the bottom guard plate, reduces redundant sealing design, and ensures effective drainage. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the battery housing provided in an embodiment of this application;

[0030] Figure 2 This is an exploded view of the battery housing provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of the bottom protective plate provided in the embodiments of this application;

[0032] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the battery compartment at point A-A'.

[0033] Figure 5 for Figure 4 A magnified view of region A in the image;

[0034] Figure 6 Another structural schematic diagram of the bottom protective plate provided in the embodiments of this application;

[0035] Figure 7 This is an exploded view of the liquid cooling plate provided in the embodiments of this application;

[0036] Figure 8 This is another exploded view of the battery housing provided in the embodiments of this application;

[0037] Figure 9 This is a schematic diagram of another structure of the battery box provided in an embodiment of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0039] The bottom protective plate in the battery box protects structures such as the liquid cooling plate, for example, from impacts from gravel encountered during vehicle operation. In related technologies, a seal is typically applied between the liquid cooling plate and the bottom protective plate. This ensures that the bottom protective plate protects the liquid cooling plate while preventing water from entering between them.

[0040] Vehicles encounter complex road conditions during operation, with wading through water being a common occurrence. Therefore, relevant technologies often employ sealing treatment between the liquid cooling plate and the underbody protection plate. However, this sealing is difficult to test in the finished product, or requires complex and costly testing methods. Even after incurring significant costs to achieve the sealing treatment, sellers or manufacturers may struggle to provide test results at the time of sale, making it impossible to promote the product to consumers or buyers.

[0041] This application provides an embodiment of a battery housing; please refer to [reference needed]. Figures 1 to 2 , Figure 1 This is a schematic diagram of the battery housing provided in an embodiment of this application. Figure 2This is an exploded view of the battery housing provided in the embodiments of this application. The battery housing 000 may include: a frame 100, a liquid cooling plate 200, and a bottom protective plate 300.

[0042] The frame 100 is located on one side of the liquid cooling plate 200 and is connected to the edge portion of the liquid cooling plate 200.

[0043] Please refer to Figure 2 and Figure 3 , Figure 3 This is a schematic diagram of the structure of the bottom protective plate provided in the embodiment of this application. The bottom protective plate 300 is located on the side of the liquid cooling plate 200 away from the frame 100. The bottom protective plate 300 may include: a bottom plate body 310 and a connecting portion 320 distributed around the bottom plate body 310. The connecting portion 320 is fixedly connected to the outer edge of the bottom plate body 310. The connecting portion 320 is closer to the liquid cooling plate 200 than the bottom plate body 310, and the connecting portion 320 is connected to the edge portion of the liquid cooling plate 200.

[0044] Please refer to Figures 3 to 5 , Figure 4 for Figure 1 The diagram shown is a cross-sectional view of the battery compartment at point A-A'. Figure 5 for Figure 4 The enlarged view of region A in this application embodiment shows that the connecting part 320, the base plate body 310 and the liquid cooling plate 200 are used to form a cavity 000a, and the base plate body 310 has a plurality of through holes 300a communicating with the cavity 000a.

[0045] like Figure 2 As shown, the frame 100, liquid cooling plate 200, and bottom protective plate 300 are arranged in a first direction X, which is perpendicular to the liquid cooling plate 200. The connecting portion 320 corresponds to the edge portion of the bottom protective plate 300. The central portion of the liquid cooling plate 200 may have a fluid flow channel, while the edge portion of the liquid cooling plate 200 does not have a fluid flow channel. In this way, after the connecting portion 320 is connected to the edge portion of the liquid cooling plate 200, it will not affect the operation of the fluid flow channel of the liquid cooling plate 200.

[0046] In this embodiment, by providing multiple through holes for drainage in the bottom plate body of the bottom guard plate, sealing between the liquid cooling plate and the bottom guard plate is unnecessary. During driving on flooded roads, the through holes allow for timely drainage. Therefore, the battery housing can save on the cost of sealing between the liquid cooling plate and the bottom guard plate, reduce redundant sealing design, and ensure effective drainage.

[0047] For some possible implementation methods, please refer to Figure 6 , Figure 6This is another structural schematic diagram of the bottom guard plate provided in the embodiment of this application. The bottom plate body 310 has a plurality of molding surfaces 301 on the side facing the liquid cooling plate 200. In the first direction X perpendicular to the liquid cooling plate 200, the distance between different molding surfaces 301 and the side of the liquid cooling plate 200 away from the bottom guard plate 300 is different.

[0048] Among the multiple molding surfaces 301, the molding surface 301 furthest from the side of the liquid cooling plate 200 opposite to the bottom protective plate 300 is the first molding surface 301a, and the first molding surface 301a has at least a partially through hole 300a. That is to say, the at least partially through hole 300a is located at the lowest position of the bottom protective plate 300 in the first direction X, so that even if water enters the cavity 000a between the liquid cooling plate 200 and the bottom protective plate 300, it can be discharged in time through the lowest through hole 300a.

[0049] For example, the bottom guard plate 300 can be formed by stamping or machining from sheet metal or composite sheet metal. In this way, the side of the bottom guard plate 300 facing the liquid cooling plate 200 will have multiple formed surfaces 301. Among these formed surfaces 301, there is a first formed surface 301a that is farthest from the side of the liquid cooling plate 200 away from the bottom guard plate 300, and a through hole 300a is provided in the first formed surface 301a.

[0050] For example, please refer to Figure 7 As shown, Figure 7 This is an exploded view of the liquid cooling plate provided in this embodiment. The liquid cooling plate 200 may include a sealing plate 210 and a flow channel plate 220. The flow channel plate 220 has a flow channel groove 220a corresponding to the fluid flow channel. After the sealing plate 210 and the flow channel plate 220 are fixedly connected, the sealing plate 210 and the flow channel groove 220a form a fluid flow channel. The sealing plate 210 is a flat plate, and it is further away from the bottom protective plate 300 relative to the flow channel plate 220. In this embodiment, the side of the liquid cooling plate 200 facing away from the bottom protective plate 300 may be the side of the sealing plate 210 facing away from the bottom protective plate 300.

[0051] Please refer to Figure 5 The edge portion of the flow channel plate 220 is connected to the connecting portion 320 of the bottom protective plate 300. In the first direction X, the portion of the flow channel plate 220 with the flow channel groove 220a is closer to the bottom plate body 310 of the bottom protective plate 300 than the connecting portion 320. The orthographic projection of the fluid flow channel of the liquid cooling plate 200 onto the sealing plate 210 overlaps with the orthographic projection of the cavity 000a onto the sealing plate 210; that is, the cavity 000a can avoid the portion of the liquid cooling plate 200 with the fluid flow channel, thus preventing the fluid flow channel from being deformed by pressure.

[0052] For some possible implementation methods, please refer to Figure 3and Figure 6 The base plate body 310 has a support structure 311 on the side facing the liquid cooling plate 200, and the support structure 311 is connected to the liquid cooling plate 200; the multiple molding surfaces may also include a second molding surface 301b, which is located on the side of the support structure 311 facing the liquid cooling plate 200.

[0053] Among them, at least some through holes 300a are distributed around the support structure 311; in the first direction X, the distance between the first molding surface 301a and the side of the liquid cooling plate 200 away from the bottom protective plate 300 is greater than the distance between the second molding surface 301b and the side of the liquid cooling plate 200 away from the bottom protective plate 300.

[0054] like Figure 3 and Figure 6 As shown, the support structure 311 can be used to support the central portion of the liquid cooling plate 200. For example, the orthographic projection of the support structure 311 onto the sealing plate 210 of the liquid cooling plate 200 overlaps with the orthographic projection of the portion of the flow channel plate 220 of the liquid cooling plate 200 other than the portion with the flow channel groove 220a onto the sealing plate 210 of the liquid cooling plate 200. That is, the support structure 311 does not contact the portion (central portion) of the flow channel plate 220 of the liquid cooling plate 200 with the flow channel groove 220a, but connects to the portion (edge ​​portion) of the flow channel plate 220 of the liquid cooling plate 200 other than the portion with the flow channel groove 220a.

[0055] For some possible implementation methods, please refer to Figure 3 and Figure 6 Among the multiple molding surfaces 301, there is also a third molding surface 301c. In the first direction X, the distance between the third molding surface 301c and the side of the liquid cooling plate 200 away from the bottom protective plate 300 is less than the distance between the first molding surface 301a and the side of the liquid cooling plate 200 away from the bottom protective plate 300, and greater than or equal to the distance between the second molding surface 301b and the side of the liquid cooling plate 200 away from the bottom protective plate 300. That is to say, the third molding surface 301c is closest to the liquid cooling plate 200.

[0056] The second forming surface 301b and the third forming surface 301c are used to divide the base plate body 310 into multiple separately arranged sub-regions, at least some of which are distributed around the support structure 311; each sub-region has a first forming surface 301a; and at least some of the sub-regions have at least one through hole 300a.

[0057] In this embodiment, by forming multiple molded surfaces 301 of different heights on the base plate body 310 of the bottom guard plate 300, the strength of the base plate body 310 can be improved. The second molded surface 301b and the third molded surface 301c can separate the first molded surface 301a, meaning there can be multiple first molded surfaces 301a. Multiple through holes 300a are separately arranged around the support structure 311. During vehicle operation, water in the cavity 000a will accumulate in a sub-region around the support structure 311 due to inertia. The accumulated water can then be discharged through the through holes 300a in these sub-regions.

[0058] For example, such as Figure 3 and Figure 6 As shown, some first molding surfaces 301a may have through holes 300a distributed within them, while others may not have through holes 300a distributed within them. The first molding surfaces 301a without through holes 300a can be used to enhance the strength of the base plate body 310.

[0059] For some possible implementation methods, please refer to Figure 3 and Figure 6 The support structure 311 may include a plurality of support longitudinal beams 311a arranged in the second direction Y, the support longitudinal beams 311a extending along the third direction Z; the second direction Y intersects the third direction Z, and both the second direction Y and the third direction Z intersect the first direction X. For example, the second direction Y is perpendicular to the third direction Z, and both the second direction Y and the third direction Z are perpendicular to the first direction X.

[0060] In the second direction Y, multiple through holes 300a are arranged in multiple rows, and at least one row of through holes 300a is distributed around the periphery of each supporting longitudinal beam 311a.

[0061] For example, the second direction Y can correspond to the vehicle's driving direction, that is, the vehicle's forward and backward direction. Thus, the extension direction of the supporting longitudinal beam 311a is perpendicular to the vehicle's driving direction. During the relative motion between the water in the cavity 000a and the cavity 000a in the second direction Y due to inertia, the water will accumulate on both sides of the supporting longitudinal beam 311a in the second direction Y. At least one row of through holes 300a is distributed around the supporting longitudinal beam 311a in the second direction Y, allowing the accumulated water to be quickly discharged from the cavity 000a through these through holes.

[0062] For some possible implementation methods, please refer to Figure 3 and Figure 6 The plurality of support longitudinal beams 311a may include: a second support longitudinal beam and a second support longitudinal beam, and at least one third support longitudinal beam located between the second support longitudinal beam and the second support longitudinal beam.

[0063] Among them, a row of through holes 300a are distributed on one side of the second support longitudinal beam facing the second support longitudinal beam; a row of through holes 300a are distributed on one side of the second support longitudinal beam facing the second support longitudinal beam; a row of through holes 300a are distributed on both sides of each third support longitudinal beam.

[0064] For example, as Figure 3 shown in Figure 6 the number of support longitudinal beams 311a is three. In Figure 6 the left support longitudinal beam 311a is the first support longitudinal beam, the right support longitudinal beam 311a is the second support longitudinal beam, and the middle support longitudinal beam 311a is the third support longitudinal beam. A row of through holes 300a are distributed on the right side of the left support longitudinal beam 311a, a row of through holes 300a are distributed on the left side of the right support longitudinal beam 311a, and a row of through holes 300a are distributed on each of the left and right sides of the middle support longitudinal beam 311a.

[0065] In some possible implementation manners, as Figure 3 shown in Figure 6 the support structure 311 may further include: at least one support cross beam 311b, the support cross beam 311b extends along the second direction Y, and the support cross beam 311b is connected to each support longitudinal beam 311a; at least one support cross beam 311b and multiple support longitudinal beams 311a can divide the cavity 000a into multiple partitions.

[0066] Please refer to Figure 8 shown in Figure 9 and Figure 8 which is another exploded view schematic diagram of the battery box body provided by the embodiment of the present application. Figure 9 which is another structural schematic diagram of the battery box body provided by the embodiment of the present application. The battery box body 000 may further include: multiple buffer layers 500 corresponding to the multiple partitions one by one, and each buffer layer 500 is located in the corresponding partition.

[0067] For example, as Figure 3 shown in Figure 9 the three support longitudinal beams 311a in the shape of a "king" character and one support cross beam 311b divide it into at least four partitions. The number of buffer layers 500 is at least four. One buffer layer 500 is provided in each partition, and the buffer layer 500 abuts against the liquid cooling plate 200 and the bottom protection plate 300 respectively on both sides in the first direction X. In this way, the buffer layer 500 can buffer and support the central part of the liquid cooling plate 200. The buffer layer 500 can be made of foam made of hydrophobic material.

[0068] Exemplarily, as Figure 3 shown in Figure 6As shown, the side of the supporting longitudinal beam 311a and / or supporting transverse beam 311b facing the liquid cooling plate 200 may have multiple supporting protrusions 311c, and the supporting protrusions 311c abut against the portion of the liquid cooling plate 200 other than the fluid flow channel.

[0069] Among some possible implementations, such as Figure 3 As shown, the through hole 300a is strip-shaped and extends along the second direction Y.

[0070] For example, the length of the through hole 300a in the second direction Y is less than or equal to 30 mm, and / or the width of the through hole 300a in the third direction Z is less than or equal to 10 mm. For instance, the length of the through hole 300a is no greater than 25 mm, and the width is no greater than 7.5 mm. This is because applications in vehicle battery boxes or battery packs involve ball impact safety testing, and the diameter of some test balls is generally greater than or equal to 25 mm. Therefore, for ball impact safety testing, the size of the through hole 300a in the bottom guard plate 300 provided in this embodiment is also correspondingly set.

[0071] Among some possible implementations, such as Figure 5 As shown, the battery housing 000 may also include: a plurality of locking members 400, and the connecting part 320 is connected to the edge portion of the liquid cooling plate 200 through the plurality of locking members 400.

[0072] The connecting part 320 has a gap 000b between the side facing the liquid cooling plate 200 and the liquid cooling plate 200, and the gap 000b is connected to the cavity 000a.

[0073] For example, in the battery housing 000 provided in the embodiments of this application, no sealing structure is provided between the liquid cooling plate 200 and the bottom protective plate 300. Therefore, a gap 000b may exist between the edge portion of the liquid cooling plate 200 and the connection portion 320 of the bottom protective plate 300.

[0074] For example, the fastening member 400 used to connect the liquid cooling plate 200 and the bottom protective plate 300 may include a rivet nut 401 and a bolt 402. The rivet nut 401 can be inserted into the mounting hole of the liquid cooling plate 200 and the frame 100 for rivet fixing. Subsequently, the bolt 402 passes through the mounting hole of the connecting portion 320 of the bottom protective plate 300 and connects to the rivet nut 401, thereby connecting the edge portion of the liquid cooling plate 200 to the connecting portion 320 of the bottom protective plate 300. The cap (i.e., the head) of the rivet nut 401 is located on the side of the liquid cooling plate 200 away from the frame 100, that is, between the connecting portion 320 of the liquid cooling plate 200 and the bottom protective plate 300. Thus, the aforementioned gap 000b exists between the edge portion of the liquid cooling plate 200 and the connecting portion 320 of the bottom protective plate 300.

[0075] In another example, the edge portion of the liquid cooling plate 200 can be in direct contact with the connection portion 320 of the bottom protective plate 300. In this way, water or other debris is less likely to enter between the edge portion of the liquid cooling plate 200 and the connection portion 320 of the bottom protective plate 300.

[0076] For example, a countersunk mounting hole can be provided on the side of the liquid cooling plate 200 facing away from the frame 100, and the rivet nut 401 can also be countersunk. In this way, the rivet nut 401 can be embedded in the liquid cooling plate 200, and the edge of the liquid cooling plate 200 can directly contact the connection portion 320 of the bottom protective plate 300. Alternatively, other types of locking members 400 can be used to connect the edge of the liquid cooling plate 200 to the connection portion 320 of the bottom protective plate 300, so that the edge of the liquid cooling plate 200 directly contacts the connection portion 320 of the bottom protective plate 300.

[0077] In summary, the battery housing provided in this application embodiment may include: a frame, a liquid cooling plate, and a bottom protective plate. By providing multiple through holes for drainage in the bottom plate body of the bottom protective plate, sealing treatment is not required between the liquid cooling plate and the bottom protective plate. When driving on flooded roads, the through holes can drain water promptly. Therefore, the battery housing can save on the cost of sealing treatment between the liquid cooling plate and the bottom protective plate, reduce redundant sealing design, and ensure effective drainage.

[0078] This application also provides a battery pack, which may include a battery module and a battery housing, wherein the battery housing is the battery housing 000 described in any of the above embodiments.

[0079] Please refer to Figure 1 The frame 100 of the battery box 000 and the liquid cooling plate 200 are used to form the battery compartment 000c. The battery module is located inside the battery compartment 000c and is thermally connected to the liquid cooling plate 200.

[0080] For example, a sealing structure can be provided between the frame 100 and the liquid cooling plate 200, so as to protect the battery module inside the battery compartment 000c.

[0081] The battery pack provided in this application also has the technical effects of the battery box 000 described in any of the above embodiments, which will not be repeated here.

[0082] This application also provides a vehicle, which may include a vehicle body and a battery pack connected to the vehicle body. The battery pack is the battery pack described in the above embodiments and has the technical effects of the battery pack described above, which will not be described again here.

[0083] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0084] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery housing, characterized in that, include: The frame (100), liquid cooling plate (200), and bottom protective plate (300); The frame (100) is located on one side of the liquid cooling plate (200) and is connected to the edge portion of the liquid cooling plate (200); The bottom protective plate (300) is located on the side of the liquid cooling plate (200) away from the frame (100); the bottom protective plate (300) includes: a bottom plate body (310) and a connecting portion (320) distributed around the bottom plate body (310), the connecting portion (320) is fixedly connected to the outer edge of the bottom plate body (310), the connecting portion (320) is closer to the liquid cooling plate (200) than to the bottom plate body (310), and the connecting portion (320) is connected to the edge portion of the liquid cooling plate (200); The connecting part (320), the base plate body (310) and the liquid cooling plate (200) are used to form a cavity (000a), and the base plate body (310) has a plurality of through holes (300a) communicating with the cavity (000a).

2. The battery pack of claim 1, wherein The base plate body (310) has a plurality of molding surfaces (301) on the side facing the liquid cooling plate (200). In a first direction perpendicular to the liquid cooling plate (200), the distance between different molding surfaces (301) and the side of the liquid cooling plate (200) away from the bottom guard plate (300) is different. Among the plurality of molding surfaces (301), the molding surface (301) that is furthest from the side of the liquid cooling plate (200) away from the bottom protective plate (300) is the first molding surface (301a), and the first molding surface (301a) has at least a portion of the through hole (300a).

3. The battery pack of claim 2, wherein, The base plate body (310) has a support structure (311) on the side facing the liquid cooling plate (200), and the support structure (311) is connected to the liquid cooling plate (200); the plurality of molding surfaces (301) further includes a second molding surface (301b), which is located on the side of the support structure (311) facing the liquid cooling plate (200); Wherein, at least a portion of the through holes (300a) are distributed around the support structure (311); in the first direction, the distance between the first molded surface (301a) and the side of the liquid cooling plate (200) away from the bottom guard plate (300) is greater than the distance between the second molded surface (301b) and the side of the liquid cooling plate (200) away from the bottom guard plate (300).

4. The battery pack of claim 3, wherein Among the plurality of molding surfaces (301), there is also a third molding surface (301c); in the first direction, the distance between the third molding surface (301c) and the side of the liquid cooling plate (200) away from the bottom protective plate (300) is less than the distance between the first molding surface (301a) and the side of the liquid cooling plate (200) away from the bottom protective plate (300), and is greater than or equal to the distance between the second molding surface (301b) and the side of the liquid cooling plate (200) away from the bottom protective plate (300); The second molding surface (301b) and the third molding surface (301c) are used to divide the base plate body (310) into a plurality of separately arranged sub-regions, at least some of the sub-regions are distributed around the support structure (311); the first molding surface (301a) is distributed in each of the sub-regions; and the through hole (300a) is distributed in at least some of the sub-regions.

5. The battery pack of claim 4, wherein, The support structure (311) includes: a plurality of support longitudinal beams (311a) arranged in a second direction, the support longitudinal beams (311a) extending along a third direction; the second direction intersects with the third direction, and both the second direction and the third direction intersect with the first direction; In the second direction, the plurality of through holes (300a) are arranged in multiple rows, and each of the supporting longitudinal beams (311a) has at least one row of through holes (300a) distributed around its periphery.

6. The battery pack of claim 5, wherein, The plurality of supporting longitudinal beams (311a) include: a first supporting longitudinal beam and a second supporting longitudinal beam, and at least one third supporting longitudinal beam located between the first supporting longitudinal beam and the second supporting longitudinal beam; The first supporting longitudinal beam has a row of through holes (300a) distributed on one side facing the second supporting longitudinal beam; the second supporting longitudinal beam has a row of through holes (300a) distributed on one side facing the first supporting longitudinal beam; and each of the third supporting longitudinal beams has a row of through holes (300a) distributed on both sides.

7. The battery pack of claim 5, wherein, The support structure (311) further includes: at least one support beam (311b) extending along the second direction and connected to each of the support longitudinal beams (311a); the at least one support beam (311b) and the plurality of support longitudinal beams (311a) are capable of dividing the cavity (000a) into multiple partitions; The battery housing (000) further includes a plurality of buffer layers (500) corresponding one-to-one with the plurality of partitions, each of the buffer layers (500) being located within the corresponding partition.

8. The battery pack of claim 5, wherein, The through hole (300a) is strip-shaped and extends along the second direction.

9. The battery pack of any one of claims 1-8, wherein, The battery housing (000) further includes: a plurality of locking components (400), and the connecting part (320) is connected to the edge portion of the liquid cooling plate (200) through the plurality of locking components (400); The connecting part (320) has a gap (000b) between the side facing the liquid cooling plate (200) and the liquid cooling plate (200), and the gap (000b) communicates with the cavity (000a).

10. A battery pack, characterized by, include: A battery module and a battery housing, wherein the battery housing is the battery housing (000) as described in any one of claims 1-9; The battery housing (000) has a frame (100) and a liquid cooling plate (200) to form a battery compartment (000c), and the battery module is located inside the battery compartment (000c).

Images