Box body of battery pack and battery pack

Abstract

The box body of the battery pack comprises a cover plate and a first edge beam, the cover plate comprises a plate body and an eave portion connected to the periphery of the plate body, an opening is formed in the side, away from the plate body, of the eave portion, the first edge beam comprises a bearing portion and a protruding portion, the bearing portion bears the eave portion, and the protruding portion is arranged on the edge of the eave portion. The protruding part is arranged on the side, facing the eave part, of the bearing part in a protruding mode and located on the side, deviating from the plate body, of the eave part. Wherein the convex part is partially arranged in the opening, a mounting hole is formed in the part, opposite to the opening, of the convex part, and a fastener is arranged in the mounting hole in a penetrating mode so that the first edge beam can be mounted on external equipment. The convex part of the first edge beam is convexly arranged on the side, facing the eave part, of the bearing part and located on the side, deviating from the plate body, of the eave part, and the convex part is partially arranged in the opening of the eave part, so that stable and tight connection of the cover plate and the first edge beam can be realized, and the sealing performance and the space utilization rate of the box body of the battery pack are improved.

Description

Technical Field

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

[0002] In related technologies, the battery pack enclosure includes an enclosure frame, a cover plate, and a bottom protective plate. The enclosure frame includes side beams, and the edge of the cover plate rests on the top of the side beams. In order to install the battery pack on external equipment, mounting holes are usually provided on the top of the side beams.

[0003] The edge of the cover plate and the side beam are prone to poor sealing. In addition, in order to prevent the cover plate from interfering with the installation of the side beam on external equipment through the mounting holes, the size of the side beam needs to be widened so that there is enough space to set the mounting holes in the part that avoids the cover plate, which results in low space utilization. Utility Model Content

[0004] The embodiments of this utility model provide a battery pack housing and a battery pack, which can improve the technical problems of insufficient sealing and space utilization in the battery pack housing.

[0005] In a first aspect, embodiments of the present invention provide a battery pack housing, comprising:

[0006] A cover plate, the cover plate including a plate body and an eaves connected to the periphery of the plate body, the eaves having an opening on the side opposite to the plate body, and,

[0007] The first side beam includes a bearing portion and a protrusion. The bearing portion supports the eaves, and the protrusion protrudes from the bearing portion on the side facing the eaves and is located on the side of the eaves away from the board body.

[0008] The protrusion is located inside the opening, and the portion of the protrusion opposite to the opening has a mounting hole for inserting a fastener to mount the first side beam to an external device.

[0009] In one embodiment, the protrusion is provided with a drainage hole that extends through the protrusion along the arrangement direction of the eaves and the protrusion.

[0010] In one embodiment, the drain hole is located at one end of the protrusion near the bearing portion; and / or,

[0011] The drainage hole is offset from the mounting hole.

[0012] In one embodiment, in the region corresponding to the opening, the eaves have a dimension greater than or equal to 7 mm in the arrangement direction of the eaves and the protrusion.

[0013] In one embodiment, in the arrangement direction of the supporting portion and the eaves, the protrusion has a first end face away from the supporting portion;

[0014] The supporting part is provided with a first connecting hole, the eaves is provided with a second connecting hole, the battery pack housing also includes a connector, the connector passes through the first connecting hole and the second connecting hole to fix the first side beam and the cover plate, and the connector has a second end face facing away from the supporting part;

[0015] The distance between the first end face and the supporting part is greater than the distance between the second end face and the supporting part.

[0016] In one embodiment, the distance between the first end face and the second end face is greater than or equal to 5 mm.

[0017] In one embodiment, the second connecting hole is offset from the opening.

[0018] In one embodiment, in the arrangement direction of the eaves and the protrusion, the supporting part is provided with a notch on the side away from the protrusion. The battery pack housing also includes a second side beam, which is partially installed in the notch. The second side beam divides the battery pack housing into a first mounting space facing the cover plate and a second mounting space away from the cover plate. The first mounting space and the second mounting space are respectively used to install battery modules.

[0019] In one embodiment, the size of the notch is between 4 mm and 6 mm in the arrangement direction of the eaves and the supporting part.

[0020] Secondly, embodiments of the present invention provide a battery pack, including the housing of the battery pack as described above.

[0021] The beneficial effects of the embodiments of this utility model are as follows:

[0022] In this embodiment of the invention, the protrusion of the first side beam protrudes from the side of the bearing portion facing the eaves and is located on the side of the eaves away from the plate body. The protrusion is partially disposed within the opening of the eaves, allowing it to limit the eaves radially and circumferentially. Combined with the bearing portion's support of the eaves, a stable mechanical connection between the eaves and the first side beam is achieved, preventing sealing defects caused by positional misalignment. The portion of the protrusion opposite the opening is larger than other portions of the protrusion, providing sufficient space for the mounting holes while controlling the overall size of the first side beam. The structure is compact, achieving a tight connection between the eaves and the first side beam, saving space and avoiding interference from the eaves to the first side beam when it is installed on external equipment through the mounting holes. In other words, in the embodiment of this utility model, the protrusion of the first side beam is provided on the side of the bearing part facing the eaves and located on the side of the eaves away from the plate body. The protrusion is located in the opening of the eaves, which can achieve a stable and tight connection between the cover plate and the first side beam, improve the sealing performance and space utilization of the battery pack box, and thus improve the technical problems of insufficient sealing performance and space utilization of the battery pack box. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of the battery pack provided in an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A magnified view of part A in the diagram;

[0026] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the cover plate in the middle;

[0027] Figure 4 yes Figure 3 A magnified view of part B in the diagram;

[0028] Figure 5 yes Figure 1 A three-dimensional schematic diagram of the first side beam in the middle;

[0029] Figure 6 yes Figure 5 A magnified view of a portion of C in the diagram;

[0030] Figure 7 yes Figure 1 A three-dimensional schematic diagram of the first side beam from another perspective;

[0031] Figure 8 yes Figure 7 A magnified view of a portion of the D area;

[0032] Figure 9 yes Figure 1 A cross-sectional schematic diagram of the battery pack in the diagram;

[0033] Figure 10 yes Figure 9 A magnified schematic diagram of a portion of E in the diagram.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1000, Battery pack; 100, Housing; 1, Cover plate; 11, Plate body; 12, Eaves; 121, Opening; 122, Second connecting hole; 2, First side beam; 21, Bearing part; 211, First connecting hole; 212, Notch; 2121, Third connecting hole; 22, Protrusion; 221, Mounting hole; 222, Drainage hole; 223, First end face; 3, Connector; 31, Second end face; 4, Second side beam; 5, Insert; 6, Sealing element; 200, Battery module. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] This application proposes a battery pack housing. Figures 1 to 10 These are some embodiments of this application.

[0038] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments of this application, the housing 100 of the battery pack 1000 includes a cover plate 1 and a first side beam 2. The cover plate 1 includes a plate body 11 and an eave 12 connected to the periphery of the plate body 11. The eave 12 has an opening 121 on the side away from the plate body 11. The first side beam 2 includes a supporting portion 21 and a protrusion 22. The supporting portion 21 supports the eave 12, and the protrusion 22 protrudes from the supporting portion 21 on the side facing the eave 12 and is located on the side of the eave 12 away from the plate body 11. The protrusion 22 is partially disposed within the opening 121, and the portion of the protrusion 22 opposite to the opening 121 has a mounting hole 221 for inserting fasteners to mount the first side beam 2 to an external device.

[0039] In the technical solution of this application, the protrusion 22 of the first side beam 2 protrudes from the side of the bearing part 21 facing the eaves 12 and is located on the side of the eaves 12 away from the plate body 11. The protrusion 22 is partially disposed within the opening 121 of the eaves 12, so that the protrusion 22 can limit the eaves 12 in the radial and circumferential directions of the plate body 11. Combined with the bearing of the bearing part 21 on the eaves 12, a stable mechanical connection between the eaves 12 and the first side beam 2 is achieved, avoiding poor sealing caused by positional displacement. The portion of the protrusion 22 opposite to the opening 121 is larger in size than the other portions of the protrusion 22, which can provide sufficient space for the mounting hole 221 while controlling the overall size of the first side beam 2. The space is compact, and the structure achieves a tight connection between the eaves 12 and the first side beam 2, saving space and avoiding interference from the eaves 12 to the installation of the first side beam 2 on external equipment through the mounting holes 221. That is, the protrusion 22 of the first side beam 2 protrudes from the bearing part 21 on the side facing the eaves 12 and is located on the side of the eaves 12 away from the plate body 11. The protrusion 22 is partially located in the opening 121 of the eaves 12, which can achieve a stable and tight connection between the cover plate 1 and the first side beam 2, improve the sealing performance and space utilization of the battery pack 1000 box 100, and thus improve the technical problems of insufficient sealing performance and space utilization of the battery pack 1000 box 100.

[0040] This application does not limit the external equipment; for example, the external equipment may be vehicles, energy storage power supplies, consumer electronics, medical equipment, smart city equipment, etc. In some examples, a first fixing hole is provided on the electrical equipment, and fasteners pass through the mounting hole 221 and the first fixing hole to install the first side beam 2 onto the electrical equipment. In other examples, an adapter is provided, which has a second fixing hole. Fasteners pass through the mounting hole 221 and the second fixing hole to fix the first side beam 2 to the adapter, and the adapter is then fixed to the electrical equipment by welding or other means.

[0041] In some embodiments of this application, see Figure 9 and Figure 10The housing 100 of the battery pack 100 includes a seal 6 located between the eaves 12 and the support portion 21. In these embodiments, the presence of the seal 6 directly improves the sealing performance between the eaves 12 and the support portion 21. In the operating environment of the battery pack 1000, preventing external moisture, dust, and other impurities from entering the battery pack 1000 is crucial. The seal 6 fills any gaps that may exist between the eaves 12 and the support portion 21, preventing the exchange of air, moisture, and other substances, protecting the battery module 200 and other components inside the battery pack 1000 from corrosion, short circuits, and other damage, thereby improving the overall performance and service life of the battery pack 1000. In some examples, the seal 6 is made of elastic materials such as rubber, silicone, or fluororubber, which can maintain its sealing performance when compressed.

[0042] In some embodiments of this application, see Figure 5 , Figure 6 , Figure 7 and Figure 8 , convex part 22 ( Figure 6 and Figure 8 A drainage hole 222 is provided between the central convex portion 22 and the supporting portion 21 (bounded by a dotted line). The drainage hole 222 extends through the convex portion 22 along the arrangement direction of the eaves 12 and the convex portion 22 (which can be understood as the width direction of the first side beam 2). In these examples, the drainage hole 222 extends through the convex portion 22 along the arrangement direction of the eaves 12 and the convex portion 22. This design allows moisture accumulated on the side of the convex portion 22 facing the eaves 12 to be discharged through the drainage hole 222. In cases where the battery pack 1000 may encounter a humid environment, the drainage hole 222 provides a drainage channel, preventing moisture from accumulating on the side of the convex portion 22 facing the eaves 12. This reduces the risk of moisture entering the battery pack 1000 from between the eaves 12 and the supporting portion 21, avoiding damage to the internal electrical components of the battery pack 1000, and preventing problems such as battery short circuits and corrosion of the battery module 200. In some examples, multiple drainage holes 222 are provided, and the multiple drainage holes 222 are arranged along the length direction of the first side beam 2.

[0043] In some embodiments of this application, the drain hole 222 is located at one end of the protrusion 22 near the support portion 21. In these embodiments, the drain hole 222 being located at one end of the protrusion 22 near the support portion 21 facilitates rapid drainage when moisture accumulates near the support portion 21, improving drainage efficiency and further protecting the interior of the battery pack 1000 from moisture damage.

[0044] In some embodiments of this application, see Figure 2The drain hole 222 and the mounting hole 221 are staggered. In these embodiments, the drain hole 222 and the mounting hole 221 are staggered, so that the arrangement of the drain hole 222 and the mounting hole 221 do not interfere with each other, ensuring the independence of the functions of the drain hole 222 and the mounting hole 221. The layout is reasonable and avoids mutual interference that may occur during the drainage process and the installation process. For example, if the drain hole 222 and the mounting hole 221 are arranged opposite each other, the unobstructed flow of the drain hole 222 may be affected when installing fasteners, or the drainage may cause adverse effects such as corrosion to the fasteners. Since the drain hole 222 is not located in the portion of the protrusion 22 corresponding to the mounting hole 221, and the other parts of the protrusion 22 are relatively small, this structural feature reduces the size required for the drain hole 222 to penetrate the protrusion 22, thereby reducing the extension length of the drain hole 222. A shorter drain hole 222 extension length means simpler structural handling during manufacturing, reducing complexity in areas such as mold making and processing. Furthermore, during assembly, a shorter drain hole 222 makes quality inspection and control easier, improving production efficiency and product quality. Additionally, a shorter drain hole 222 path reduces water flow resistance, allowing water to drain more quickly through the drain hole 222, effectively improving drainage efficiency and further protecting the battery pack 1000 from moisture damage.

[0045] In some embodiments of this application, see Figure 4 In the area corresponding to the opening 121, the dimensions of the eaves 12 in the arrangement direction of the eaves 12 and the protrusion 22 (which can be understood as the width direction of the first side beam 2) Figure 4 a) is greater than or equal to 7 mm. In these embodiments, in the area corresponding to the opening 121, the width of the eaves 12 (the dimension of the eaves 12 in the arrangement direction of the eaves 12 and the protrusion 22) is sufficiently large (greater than or equal to 7 mm) so that the supporting part 21 can provide sufficient structural support for the eaves 12, ensuring the connection strength and sealing width between the supporting part 21 and the eaves 12, better maintaining the connection relationship between the eaves 12 and the first side beam 2, and ensuring the structural integrity and sealing of the battery pack 1000's housing 100.

[0046] In some embodiments of this application, see Figure 4 , Figure 8 and Figure 10In the arrangement direction of the supporting part 21 and the eaves 12 (which can be understood as the height direction of the first side beam 2), the protrusion 22 has a first end face 223 away from the supporting part 21; the supporting part 21 is provided with a first connecting hole 211, the eaves 12 is provided with a second connecting hole 122, and the housing 100 of the battery pack 1000 also includes a connector 3, which passes through the first connecting hole 211 and the second connecting hole 122 to fix the first side beam 2 and the cover plate 1. The connector 3 has a second end face 31 facing away from the supporting part 21; wherein, the distance between the first end face 223 and the supporting part 21 is greater than the distance between the second end face 31 and the supporting part 21. In these embodiments, the distance between the first end face 223 and the supporting part 21 is greater than the distance between the second end face 31 and the supporting part 21, that is, there is a height difference between the first end face 223 and the second end face 31 (see Figure 10 In section b), after the connector 3 connects the cover plate 1 and the first side beam 2, when fasteners are inserted through the first end face 223 to install the first side beam 2 in the external device, due to the height difference, the connector 3 will not interfere with the installation of the first side beam 2. No additional adjustments to the connector 3 or complex operations to avoid it are required, thus optimizing the entire battery pack 1000 installation process. From a spatial layout perspective, it's like reserving non-interfering space layers for different installation steps, allowing each step to proceed smoothly. This helps reduce installation time, improves production efficiency, and lowers the risk of malfunctions due to improper installation, ensuring the stability and reliability of the battery pack 1000 in the external device.

[0047] In some embodiments of this application, the spacing between the first end face 223 and the second end face 31 (see...) Figure 10 b) is greater than or equal to 5mm. In these embodiments, when the distance between the first end face 223 and the second end face 31 is greater than or equal to 5mm, there is sufficient space for operation during the process of installing the first side beam 2 to the external device by passing fasteners through the first end face 223. This distance can prevent the operator from accidentally touching the connector 3 during operation, avoid installation errors that may be caused by the narrow operating space, such as the fasteners being installed crookedly, and further reduce the risk of failure that may be caused by improper installation, thus ensuring the installation stability and reliability of the battery pack 1000 in the external device.

[0048] In some embodiments of this application, see Figure 4The second connecting hole 122 is offset from the opening 121. In these embodiments, the second connecting hole 122 is offset from the opening 121, meaning that the second connecting hole 122 is not located in the area corresponding to the opening 121 of the eaves 12. Since the area of ​​the eaves 12 corresponding to the opening 121 is relatively small, while the other parts are relatively large, this provides sufficient structural space for the setting of the second connecting hole 122. This ensures that the second connecting hole 122 is not limited by the narrow space of the opening 121 area during the setting process, facilitating accurate positioning and processing during manufacturing. Understandably, the placement of opening 121 and the second connecting hole 122 will reduce the strength of the corresponding area of ​​the eaves 12. When they are staggered, the superposition of the strength-weakened areas is avoided. If opening 121 and the second connecting hole 122 are placed in the same area, the strength of that area will be greatly weakened, which may affect the load-bearing capacity and stability of the eaves 12 in the battery pack 1000 structure. After being staggered, the effect of strength weakening is distributed to different areas, which reduces the decrease in the overall structural strength of the eaves 12. This helps to maintain the structural function of the eaves 12 in the battery pack 1000 and ensures that the eaves 12 can effectively cooperate with other components, such as maintaining a stable connection with the bearing part 21. This plays a positive role in protecting the internal structure of the battery pack 1000 and helps to ensure the sealing and overall structural strength of the battery pack 1000.

[0049] In some embodiments of this application, see Figure 6 , Figure 8 , Figure 9 and Figure 10 In the arrangement direction of the eaves 12 and the protrusion 22 (which can be understood as the width direction of the first side beam 2), the bearing part 21 is provided with a notch 212 on the side away from the protrusion 22. The box 100 of the battery pack 1000 also includes a second side beam 4. The second side beam 4 is partially installed in the notch 212. The second side beam 4 divides the box 100 of the battery pack 1000 into a first installation space facing the cover plate 1 and a second installation space away from the cover plate 1. The first installation space and the second installation space are respectively used to install the battery module 200. In these implementations, the second side beam 4 divides the battery pack 1000 housing 100 into a first installation space and a second installation space for installing the battery module 200, achieving a reasonable layout of the battery module 200. This layout helps improve the utilization rate of the internal space of the battery pack 1000, facilitates the installation, maintenance and management of the battery module 200, and also helps optimize the heat dissipation and other performance of the battery pack 1000. In the arrangement direction of the eaves 12 and the protrusions 22, the supporting part 21 has a notch 212 on the side opposite to the protrusions 22. The second side beam 4 is partially installed in the notch 212, which is conducive to the installation and fixation of the second side beam 4. In some examples, the groove wall of the notch 212 that supports the second side beam 4 has a third connecting hole 2121 (see Figure 8 The second side beam 4 is provided with a fourth connecting hole, and the housing 100 of the battery pack 1000 also includes a plug-in 5 (see...). Figure 10 Insert 5 is inserted into the third connecting hole 2121 and the fourth connecting hole to connect the second side beam 4 and the first side beam 2.

[0050] In some embodiments of this application, the dimensions of the notch 212 (see [reference needed]) are as follows: [details about the arrangement direction of the eaves 12 and the supporting portion 21, which can be understood as the height direction of the first side beam 2]. Figure 10 c) is between 4mm and 6mm. In these embodiments, in the arrangement direction of the eaves 12 and the support portion 21, the size of the notch 212 is between 4mm and 6mm, that is, the height difference between the support surface provided by the support portion 21 to the eaves 12 and the support surface provided by the notch 212 to the second side beam 4 (the groove wall supporting the second side beam 4) is between 4mm and 6mm. For the second side beam 4, a sufficient height difference (greater than or equal to 4mm) allows the notch 212 to effectively limit the second side beam 4 in the arrangement direction of the protrusion 22 and the eaves 12. For the first side beam 2, controlling the height difference within a certain range (greater than or equal to 6mm) can prevent the first side beam 2 from being too large. Controlling the size of the first side beam 2 and having a suitable size also helps to reduce material costs and lighten the overall weight of the battery pack 1000. In addition, the existence of the height difference can reduce the mutual interference between the installation operations of the eaves 12 and the second side beam 4 and improve installation efficiency.

[0051] This application also proposes a battery pack 1000, which includes a housing 100, as described above. Since this battery pack 1000 adopts all the technical solutions of the above embodiments, it at least possesses the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0052] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack housing, characterized in that, include: A cover plate, the cover plate including a plate body and an eaves connected to the periphery of the plate body, the eaves having an opening on the side opposite to the plate body, and, The first side beam includes a bearing portion and a protrusion. The bearing portion supports the eaves, and the protrusion protrudes from the bearing portion on the side facing the eaves and is located on the side of the eaves away from the board body. The protrusion is located inside the opening, and the portion of the protrusion opposite to the opening is provided with a mounting hole for inserting a fastener to install the first side beam onto an external device. In the arrangement direction of the supporting part and the eaves, the protrusion has a first end face away from the supporting part; the supporting part is provided with a first connecting hole, the eaves is provided with a second connecting hole, the battery pack housing also includes a connector, the connector passes through the first connecting hole and the second connecting hole to fix the first side beam and the cover plate, the connector has a second end face away from the supporting part; wherein, the distance between the first end face and the supporting part is greater than the distance between the second end face and the supporting part.

2. The casing of the battery pack according to claim 1, characterized in that, The protrusion is provided with a drainage hole, which penetrates the protrusion along the arrangement direction of the eaves and the protrusion.

3. The housing of the battery pack according to claim 2, characterized in that, The drainage hole is located at one end of the protrusion near the bearing portion; and / or The drainage hole is offset from the mounting hole.

4. The casing of the battery pack according to claim 1, characterized in that, In the area corresponding to the opening, the size of the eaves in the arrangement direction of the eaves and the protrusions is greater than or equal to 7 mm.

5. The housing of the battery pack according to claim 1, characterized in that, The distance between the first end face and the second end face is greater than or equal to 5 mm.

6. The housing of the battery pack according to claim 1, characterized in that, The second connecting hole is offset from the opening.

7. The casing of the battery pack according to claim 1, characterized in that, In the arrangement direction of the eaves and the protrusion, the supporting part is provided with a notch on the side away from the protrusion. The battery pack housing also includes a second side beam. The second side beam is partially installed in the notch. The second side beam divides the battery pack housing into a first installation space facing the cover plate and a second installation space away from the cover plate. The first installation space and the second installation space are respectively used to install battery modules.

8. The housing of the battery pack according to claim 7, characterized in that, In the arrangement direction of the eaves and the supporting part, the size of the notch is between 4mm and 6mm.

9. A battery pack, characterized in that, The housing includes the battery pack as described in any one of claims 1 to 8.

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