Battery pack shell assembly and battery pack

Abstract

The utility model discloses a battery pack shell assembly. The battery pack shell assembly comprises a shell, a connecting piece and a bottom plate, the shell is internally provided with a through hollow cavity, the hollow cavity has a first direction, the bottom plate is arranged at one end of the hollow cavity along the first direction, the bottom plate and the shell are enclosed to form an accommodating cavity, the accommodating cavity is used for placing a battery cell module, and the first direction is a direction in which the hollow cavity penetrates through the shell; the connecting piece is arranged on the side, away from the containing cavity, of the bottom plate and provided with a first installation face and a second installation face which intersect, the bottom plate is connected with the first installation face, and the shell is connected with the second installation face. Therefore, the connecting piece is arranged between the shell and the bottom plate, and the shell and the bottom plate are respectively connected to different mounting surfaces of the connecting piece, so that when the shell assembly is impacted by external force, stress can be dispersed, local stress concentration is avoided, and the connecting strength between the shell and the bottom plate is improved.

Description

Technical Field

[0001] This application belongs to the field of battery pack technology, specifically relating to a battery pack housing assembly and a battery pack. Background Technology

[0002] Currently, with the rapid development of new energy technologies, the demand for battery packs is increasing. A battery pack consists of cell modules and a battery pack housing assembly. The housing assembly supports and protects the battery cells.

[0003] In related technologies, the battery pack housing assembly mainly includes a top cover, an aluminum barrel, and a bottom cover, with the aluminum barrel and bottom cover connected by welding. However, during use, stress concentration can easily occur at the weld between the aluminum barrel and the bottom cover, leading to connection failure and affecting the performance of the battery pack. Utility Model Content

[0004] This application aims to provide a battery pack housing assembly and a battery pack, which can solve the problem that stress concentration easily occurs at the weld between the aluminum barrel and the bottom cover during use, leading to connection failure between the aluminum barrel and the bottom cover and affecting the performance of the battery pack.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose a battery pack housing assembly, comprising: a housing, a connector, and a base plate; the housing has a through hollow cavity having a first direction, the base plate is disposed at one end of the hollow cavity along the first direction, the base plate and the housing enclose a receiving cavity for placing a battery cell module; the first direction is the direction in which the hollow cavity penetrates the housing; the connector is disposed on the side of the base plate away from the receiving cavity, the connector has an intersecting first mounting surface and a second mounting surface, the base plate is connected to the first mounting surface, and the housing is connected to the second mounting surface.

[0007] Optionally, the connector is disposed on at least a portion of the sidewall of the hollow cavity.

[0008] Optionally, the connector includes a first connecting segment and a second connecting segment; the first connecting segment and the second connecting segment are connected to each other; the first connecting segment is provided with a first mounting surface, the second connecting segment is provided with a second mounting surface, the first connecting segment is connected to the base plate, and the second connecting segment is connected to the housing.

[0009] Optionally, the battery pack housing assembly further includes at least two first fasteners; the base plate is connected to the first connecting segment via the first fasteners; and / or, the housing is connected to the second connecting segment via the first fasteners.

[0010] Optionally, the first connecting segment is at least partially welded to the base plate, and the second connecting segment is at least partially welded to the housing.

[0011] Optionally, the battery pack housing assembly further includes a sealant layer, and a first gap exists between the housing and the base plate; the sealant layer is disposed within the first gap.

[0012] Optionally, the battery pack housing assembly further includes a bottom cover; the bottom cover is disposed on the side of the base plate opposite to the receiving cavity, and at least a second gap exists between the bottom cover and the base plate.

[0013] Optionally, the bottom cover has at least two reinforcing ribs on the side facing the base plate; a plurality of the reinforcing ribs are cross-connected to form a mesh structure, and at least part of the mesh structure and the base plate form the second gap.

[0014] Optionally, the battery pack housing assembly further includes a buffer and a second fastener; the buffer is located on the side of the bottom cover away from the base plate, and the second fastener passes through the buffer and the bottom cover in sequence and is connected to the base plate.

[0015] Optionally, the buffer is located on the side of the bottom cover away from the bottom plate. The buffer has a mounting groove with opposing openings and bottoms. The bottom of the groove has a third mounting hole, and a protrusion surrounds the third mounting hole. The protrusion is located on the buffer. The second fastener includes a screw and a nut connected to each other. The screw passes through the third mounting hole and the bottom cover in sequence and is connected to the bottom plate. The nut abuts against the protrusion.

[0016] Secondly, embodiments of this application provide a battery pack including the battery pack housing assembly described in any of the above embodiments.

[0017] In the embodiments of this application, a housing, a connector, and a base plate are provided in the battery pack housing assembly. The housing has a through hollow cavity, and the base plate is located at one end of the hollow cavity along a first direction. The base plate and the housing enclose a receiving cavity for placing the battery cell module. The first direction X is the direction in which the hollow cavity penetrates the housing. The connector is located on the side of the base plate away from the receiving cavity. The connector has an intersecting first mounting surface and a second mounting surface. The base plate is connected to the first mounting surface, and the housing is connected to the second mounting surface. In this way, by providing a connector between the housing and the base plate, and connecting the housing and the base plate to different mounting surfaces of the connector, the force can be dispersed when the housing assembly is subjected to external impact, avoiding local stress concentration, thereby improving the connection strength between the housing and the base plate.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is an exploded view of the battery pack housing assembly according to an embodiment of this application;

[0021] Figure 2 This is a cross-sectional view of a battery pack housing assembly according to an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the connector according to an embodiment of this application;

[0023] Figure 4 This is one of the enlarged partial structural views of the battery pack housing assembly according to an embodiment of this application;

[0024] Figure 5 This is a second enlarged view of a partial structure of the battery pack housing assembly according to an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the bottom cover according to an embodiment of this application;

[0026] Figure 7 yes Figure 6 An enlarged view of part A, shown in the center circle;

[0027] Figure 8 This is a schematic diagram of the buffer and the bottom cover fitting together according to an embodiment of this application.

[0028] Figure label:

[0029] 1-Housing; 2-Connector; 3-Base plate; 4-Accommodating cavity; 5-First mounting surface; 6-Second mounting surface; 7-First connecting section; 8-Second connecting section; 9-First mounting hole; 10-Second mounting hole; 11-First fastener; 12-Sealant layer; 13-First gap; 14-Bottom cover; 15-Second gap; 16-Reinforcing rib; 17-Buffer; 18-Second fastener; 181-Screw; 182-Nut; 19-Mounting groove; 20-Third mounting hole; 21-Protrusion; 22-Top cover; 23-Handle; 24-Third fastener; 25-Reinforcing plate; 26-Groove; 27-Groove bottom; 28-Fourth mounting hole; X-First direction. Detailed Implementation

[0030] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The battery pack housing assembly and battery pack provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0035] like Figure 1 and Figure 5As shown, a battery pack housing assembly according to some embodiments of this application includes: a housing 1, a connector 2, and a base plate 3; the housing 1 has a through hollow cavity with a first direction X, the base plate 3 is disposed at one end of the hollow cavity along the first direction X, and the base plate 3 and the housing 1 enclose a receiving cavity 4 for placing a battery cell module; the first direction X is the direction in which the hollow cavity passes through the housing 1; the connector 2 is disposed on the side of the base plate 3 away from the receiving cavity 4, the connector 2 has an intersecting first mounting surface 5 and a second mounting surface 6, the base plate 3 is connected to the first mounting surface 5, and the housing 1 is connected to the second mounting surface 6.

[0036] In this embodiment, a battery pack housing assembly includes a housing 1, a connector 2, and a base plate 3. The housing 1 has a through hollow cavity, and the base plate 3 is located at one end of the hollow cavity along a first direction X. The base plate 3 and the housing 1 enclose a receiving cavity 4 for placing the battery cell module. The connector 2 is located on the side of the base plate 3 away from the receiving cavity 4. The connector 2 has an intersecting first mounting surface 5 and a second mounting surface 6. The base plate 3 is connected to the first mounting surface 5, and the housing 1 is connected to the second mounting surface 6. Thus, by providing the connector 2 between the housing 1 and the base plate 3, and connecting the housing 1 and the base plate 3 to different mounting surfaces of the connector 2, the force can be dispersed when the housing assembly is subjected to external impact, avoiding local stress concentration and thereby improving the connection strength between the housing 1 and the base plate 3.

[0037] In some embodiments, such as Figure 1 As shown, the battery pack housing assembly also includes a top cover 22 and a handle 23. The top cover 22 is detachably connected to the housing 1 by a third fastener 24. The handle 23 is rotatably connected to the top cover 22, making it convenient for users to lift the battery pack housing assembly.

[0038] In some embodiments, such as Figures 4 to 5 As shown, the first mounting surface 5 of the connector 2 supports the base plate 3, and the second mounting surface 6 of the connector 2 is connected to the housing 1.

[0039] In some other embodiments, the connector 2 may also be disposed on the side of the base plate 3 near the receiving cavity 4, the first mounting surface 5 of the connector 2 is connected to the side wall of the receiving cavity 4, and the second mounting surface 6 of the connector 2 is connected to the side of the base plate 3 near the receiving cavity 4.

[0040] It should be noted that connector 2 can be Figure 3 The L-shaped connector shown can also be a polyhedral structure such as a triangular pyramid or a cuboid; this application does not limit the specific structure.

[0041] Optionally, such as Figures 1 to 3 As shown, the connector 2 is disposed on at least a portion of the sidewall of the hollow cavity.

[0042] In this embodiment of the application, by providing a connector 2 on at least a portion of the sidewall of the hollow cavity, materials can be saved and costs reduced.

[0043] It should be noted that the connection 2 being provided on at least part of the side wall of the hollow cavity means that the connection 2 can be provided on all four side walls of the hollow cavity, or on part of the side wall of the hollow cavity.

[0044] In some embodiments, the connector 2 includes a plurality of sub-connectors, which are arranged along the bottom of the base plate 3, for example, multiple sub-connectors are arranged along one long side of the base plate 3. The multiple sub-connectors are spaced apart, and the spacing can be selected according to actual needs, as long as it meets the connection strength requirements between the base plate 3 and the housing 1. Of course, it can also be as follows: Figure 1 As shown, multiple sub-connectors can be continuously set along the circumferential edge of the base plate 3.

[0045] Optionally, such as Figures 3 to 5 As shown, the connector 2 includes a first connecting section 7 and a second connecting section 8; the first connecting section 7 and the second connecting section 8 are connected to each other; the first connecting section 7 is provided with a first mounting surface 5, the second connecting section 8 is provided with a second mounting surface 6, the first connecting section 7 is connected to the base plate 3, and the second connecting section 8 is connected to the housing 1.

[0046] In this embodiment, a first connecting segment 7 and a second connecting segment 8 are provided in the connector 2 for interconnection. A first mounting surface 5 is provided on the first connecting segment 7, and a second mounting surface 6 is provided on the second connecting segment 8. The first connecting segment 7 is connected to the base plate 3, and the second connecting segment 8 is connected to the housing 1. In this way, using two connecting segments to connect the base plate 3 and the housing 1 helps to save the connection space between the base plate 3 and the housing 1 and expand the space of the accommodating cavity 4. At the same time, it saves materials and reduces costs.

[0047] Specifically, such as Figure 3 As shown, there are four connectors 2 (only two are shown in the figure), with two length specifications. The longer connector 2 is connected to the long side of the base plate 3, and the shorter connector 2 is connected to the short side of the base plate 3.

[0048] Optionally, the battery pack housing assembly further includes a first fastener 11; the base plate 3 is connected to the first connecting segment 7 via the first fastener 11; and / or, the housing 1 is connected to the second connecting segment 8 via the first fastener 11.

[0049] In this embodiment, the base plate 3 is connected to the first connecting segment 7 by the first fastener 11, and / or the housing 1 is connected to the second connecting segment 8 by the first fastener 11. This avoids the problem of the metal at the weld becoming brittle due to direct welding of the base plate 3 and the housing 1, and the problem of stress concentration in the metal at the weld causing connection failure. At the same time, the bolt connection structure does not damage the internal structure of the metal, making the connection between the base plate 3 and the housing 1 more stable.

[0050] In some embodiments, the first fastener 11 can be a bolt. The first connecting section 7 has multiple first mounting holes 9, each with a thread. The first fastener 11 passes through the base plate 3 and connects with the threads in the first mounting holes 9. The second connecting section 8 has multiple second mounting holes 10, each with a thread. The first fastener 11 passes through the housing 1 and connects with the threads in the second mounting holes 10. The threads in the first and second mounting holes 9 and 10 facilitate the installation of the connector 2 with the base plate 3 and the housing 1.

[0051] In some other embodiments, the first mounting hole 9 and the second mounting hole 10 may not have threads. After the bolt passes through the base plate 3 and the first connecting section 7, it is connected to the nut. After the bolt passes through the housing 1 and the second connecting section 8, it is connected to the nut.

[0052] Specifically, such as Figure 3 As shown, the first mounting hole 9 and the second mounting hole 10 are staggered to avoid interference between the connector 2 and the other components during installation. "Staggered" means that the axis of the first mounting hole 9 does not intersect with the axis of the second mounting hole 10.

[0053] In some embodiments, when connecting the connector 2 to the housing 1 and the base plate 3, firstly, the base plate 3 and the first mounting hole 9 are connected, with the first fastener 11 passing through the base plate 3 and connecting to the first mounting hole 9; then, the housing 1 and the second mounting hole 10 are connected, with the first fastener 11 passing from the outside of the housing 1 inwards and connecting to the second mounting hole 10. Of course, the connection order described above can also be reversed, i.e., the second mounting hole 10 is connected first, followed by the first mounting hole 9.

[0054] In some other embodiments, during the connection of the first fastener 11 with the first mounting hole 9 and the second mounting hole 10, sealant can be applied to the inside of the first mounting hole 9 and the second mounting hole 10 to improve the sealing between the first fastener 11 and the first mounting hole 9, as well as the sealing between the first fastener 11 and the second mounting hole 10.

[0055] It should be noted that the first fastener 11 can be an M2 countersunk bolt or an M4 countersunk bolt, and this embodiment of the application does not impose any restrictions.

[0056] Optionally, the first connecting segment 7 is at least partially welded to the base plate 3, and the second connecting segment 8 is at least partially welded to the housing 1.

[0057] In this embodiment, the first connecting segment 7 is at least partially welded and fixed to the base plate 3, and the second connecting segment 8 is at least partially welded and fixed to the housing 1. This at least partial welding further strengthens the connection between the first connecting segment 7 and the base plate 3, and the connection between the second connecting segment 8 and the housing 1. Simultaneously, welding improves the sealing performance between the first connecting segment 7 and the base plate 3, and between the second connecting segment 8 and the housing 1.

[0058] Specifically, such as Figure 5 As shown, the base plate 3 has a groove on the side near the first mounting surface 5, and the first connecting section 7 is partially disposed in the groove. The end of the first connecting section 7 near the side wall of the groove forms a first weld area with the side wall of the groove. The first weld area is used to weld the first connecting section 7 to the base plate 3. The second connecting section 8 has a notch on the side near the housing 1. The notch is the second weld area, which is used to weld the second connecting section 8 to the housing 1.

[0059] Optionally, such as Figures 4 to 5 As shown, the battery pack housing assembly also includes a sealant layer 12, and a first gap 13 exists between the housing 1 and the base plate 3; the sealant layer 12 is disposed within the first gap 13.

[0060] In this embodiment, the sealant layer 12 is disposed within the first gap 13 between the housing 1 and the base plate 3. This improves the sealing between the housing 1 and the base plate 3, preventing coolant from flowing out of the accommodating cavity 4.

[0061] In this embodiment, to accelerate heat dissipation of the battery cell module, a cooling medium is provided in the accommodating cavity 4. The cooling medium is used to cool the battery cell module. The cooling medium is a phase change material. When the battery cell module dissipates heat, the cooling medium changes from a solid state to a liquid state. Therefore, it is necessary to improve the sealing between the connector 2, the base plate 3, and the housing 1.

[0062] Furthermore, such as Figure 4 As shown, the connector 2, the base plate 3 and the housing 1 form a sealed cavity, and the first gap 13 constitutes part of the sealed cavity; the sealant layer 12 can be filled in the sealed cavity to improve the sealing performance between the housing 1, the connector 2 and the base plate 3.

[0063] For example, the sealant layer 12 can be formed after the adhesive has cured. After the base plate 3 and the housing 1 are installed, the adhesive is injected into the sealing cavity through a syringe. The injection is stopped when the adhesive just overflows from the base plate 3. The sealing requirement is achieved after the adhesive has cured.

[0064] Optionally, such as Figure 2As shown, the battery pack housing assembly also includes a bottom cover 14; the bottom cover 14 is located on the side of the base plate 3 away from the receiving cavity 4, and at least a second gap 15 exists between the bottom cover 14 and the base plate 3.

[0065] In this embodiment, by placing the bottom cover 14 on the side of the base plate 3 away from the accommodating cavity 4, a second gap 15 is at least partially present between the bottom cover 14 and the base plate 3. In this way, when the bottom cover 14 is subjected to an external force impact, the second gap 15 provides a deformation buffer space for the bottom cover 14, absorbs deformation energy, and helps to protect the base plate 3 and the battery cell module located on the base plate 3.

[0066] In some embodiments, such as Figures 4 to 6 As shown, a step is also provided on the circumferential edge of the bottom cover 14. The step abuts against the second connecting section 8 and the housing 1 respectively. This is so as to use the step to support the connector 2 and the housing 1, thereby improving the connection strength between the connector 2, the housing 1 and the bottom cover 14.

[0067] Optionally, such as Figure 2 , Figure 6 and Figure 7 As shown, the bottom cover 14 is provided with at least two reinforcing ribs 16 on the side facing the bottom plate 3; the at least two reinforcing ribs 16 are cross-connected to form a mesh structure, and at least part of the mesh structure and the bottom plate 3 form a second gap 15.

[0068] In this embodiment, a reinforcing rib 16 is provided on the side of the bottom cover 14 facing the bottom plate 3; the reinforcing rib 16 are cross-connected to form a mesh structure, and at least a second gap 15 is formed between the mesh structure and the bottom plate 3. In this way, when the bottom cover 14 is subjected to an external impact, the mesh structure can deform to absorb the impact energy, and the reinforcing rib 16 can improve the deformation resistance of the bottom cover 14 and reduce the deformation of the bottom cover 14.

[0069] Specifically, a fourth mounting hole 28 is provided in the mesh structure, and a reinforcing plate 25 is provided around the fourth mounting hole 28. One side of the reinforcing plate 25 is connected to the bottom cover 14, and the other side is connected to part of the mesh structure. The reinforcing plate 25 is used to strengthen the strength of the mesh structure around the fourth mounting hole 28.

[0070] Optionally, such as Figure 8 As shown, the battery pack housing assembly also includes a buffer 17 and a second fastener 18; the buffer 17 is located on the side of the bottom cover 14 away from the bottom plate 3, and the second fastener 18 passes through the buffer 17 and the bottom cover 14 in sequence and is connected to the bottom plate 3.

[0071] In this embodiment, a buffer 17 and a second fastener 18 are provided in the battery pack housing assembly. The buffer 17 is located on the side of the bottom cover 14 facing away from the bottom plate 3, and the second fastener 18 passes through the buffer 17 and the bottom cover 14 in sequence before connecting to the bottom plate 3. This connection between the bottom cover 14 and the bottom plate 3 using the second fastener 18 improves the connection strength between the bottom plate 3 and the bottom cover 14. Simultaneously, the buffer 17 can absorb energy when the bottom cover is subjected to external force.

[0072] Specifically, the buffer 17 can be a rubber buffer. When the bottom cover is subjected to external force, both the rubber buffer and the bottom cover 14 can absorb energy to protect the battery module.

[0073] Optionally, such as Figure 8 As shown, the buffer 17 is located on the side of the bottom cover 14 away from the bottom plate 3. The buffer 17 has a mounting groove 19 with opposite openings 26 and bottoms 27. The bottom 27 has a third mounting hole 20 and a protrusion 21 around the third mounting hole 20. The protrusion 21 is located on the buffer 17. The second fastener 18 includes a screw 181 and a nut 182 connected to each other. The screw 181 passes through the third mounting hole 20 and the bottom cover 14 in sequence and is connected to the bottom plate 3. The nut 182 abuts against the protrusion 21.

[0074] In this embodiment, by placing the buffer 17 on the side of the bottom cover 14 away from the bottom plate 3, a third mounting hole 20 is provided at the bottom 27 of the mounting groove 19 of the buffer 17, and a protrusion 21 is provided around the third mounting hole 20. The protrusion 21 is placed on the buffer 17, and the screw 181 passes through the third mounting hole 20 and the bottom cover 14 in sequence and is connected to the bottom plate 3. The nut 182 abuts against the protrusion 21. In this way, when the screw 181 is connected to the bottom plate 3, the protrusion 21 is pressed by the nut 182 to improve the sealing between the second fastener 18 and the buffer 17.

[0075] Specifically, the protrusion 21 is annular and surrounds the third mounting hole 20. One or more protrusions 21 can be provided around the third mounting hole 20 to further improve the sealing between the second fastener 18 and the buffer 17.

[0076] Optionally, a battery pack includes the battery pack housing assembly of any of the above embodiments.

[0077] In this embodiment, a housing 1, a connector 2, and a base plate 3 are provided in the battery pack housing assembly. The housing 1 has a through hollow cavity, and the base plate 3 is located at one end of the hollow cavity along a first direction X. The base plate 3 and the housing 1 enclose a receiving cavity 4 for placing the battery cell module. The connector 2 is located on the side of the base plate 3 away from the receiving cavity 4. The connector 2 has an intersecting first mounting surface 5 and a second mounting surface 6. The base plate 3 is connected to the first mounting surface 5, and the housing 1 is connected to the second mounting surface 6. In this way, by providing the connector 2 between the housing 1 and the base plate 3, and connecting the housing 1 and the base plate 3 to different mounting surfaces of the connector 2, the force can be dispersed when the housing assembly is subjected to external impact, avoiding local stress concentration, thereby improving the connection strength between the housing 1 and the base plate 3.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack housing assembly, characterized in that, include: The shell (1), the connector (2), and the base plate (3); The housing (1) has a through hollow cavity with a first direction (X). The bottom plate (3) is located at one end of the hollow cavity along the first direction (X). The bottom plate (3) and the housing (1) enclose a receiving cavity (4). The receiving cavity (4) is used to place the battery cell module. The first direction (X) is the direction in which the hollow cavity penetrates the housing (1). The connector (2) is located on the side of the base plate (3) away from the accommodating cavity (4). The connector (2) has an intersecting first mounting surface (5) and a second mounting surface (6). The base plate (3) is connected to the first mounting surface (5), and the housing (1) is connected to the second mounting surface (6).

2. The battery pack housing assembly according to claim 1, characterized in that, The connector (2) is disposed on at least a portion of the sidewall of the hollow cavity.

3. The battery pack housing assembly according to any one of claims 1-2, characterized in that, The connector (2) includes a first connecting segment (7) and a second connecting segment (8); The first connecting segment (7) and the second connecting segment (8) are connected to each other; the first connecting segment (7) is provided with the first mounting surface (5), the second connecting segment (8) is provided with the second mounting surface (6), the first connecting segment (7) is connected to the base plate (3), and the second connecting segment (8) is connected to the housing (1).

4. The battery pack housing assembly according to claim 3, characterized in that, The battery pack housing assembly also includes a first fastener (11); The base plate (3) is connected to the first connecting section (7) via the first fastener (11); And / or, the housing (1) is connected to the second connecting segment (8) via the first fastener (11).

5. The battery pack housing assembly according to claim 4, characterized in that, The first connecting segment (7) is at least partially welded to the base plate (3), and the second connecting segment (8) is at least partially welded to the housing (1).

6. The battery pack housing assembly according to claim 1, characterized in that, The battery pack housing assembly further includes a sealant layer (12), and a first gap (13) exists between the housing (1) and the base plate (3); the sealant layer (12) is disposed in the first gap (13).

7. The battery pack housing assembly according to claim 1, characterized in that, The battery pack housing assembly also includes a bottom cover (14); The bottom cover (14) is located on the side of the bottom plate (3) away from the accommodating cavity (4), and at least a second gap (15) exists between the bottom cover (14) and the bottom plate (3).

8. The battery pack housing assembly according to claim 7, characterized in that, The bottom cover (14) is provided with at least two reinforcing ribs (16) on the side facing the bottom plate (3); the at least two reinforcing ribs (16) are cross-connected to form a mesh structure, and at least part of the mesh structure and the bottom plate (3) form the second gap (15).

9. The battery pack housing assembly according to claim 8, characterized in that, The battery pack housing assembly also includes a buffer (17) and a second fastener (18); The buffer (17) is located on the side of the bottom cover (14) away from the bottom plate (3), and the second fastener (18) passes through the buffer (17) and the bottom cover (14) in sequence and is connected to the bottom plate (3).

10. The battery pack housing assembly according to claim 9, characterized in that, The buffer (17) is located on the side of the bottom cover (14) away from the bottom plate (3). The buffer (17) has a mounting groove (19) with opposite openings (26) and bottoms (27). The bottom (27) has a third mounting hole (20) and a protrusion (21) around the third mounting hole (20). The protrusion (21) is located on the buffer (17). The second fastener (18) includes a screw (181) and a nut (182) connected to each other. The screw (181) passes through the third mounting hole (20) and the bottom cover (14) in sequence and is connected to the bottom plate (3). The nut (182) abuts against the protrusion (21).

11. A battery pack, characterized in that, Includes the battery pack housing assembly as described in any one of claims 1 to 10.

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