Battery pack shell and battery pack

Abstract

The utility model provides a battery pack shell and a battery pack, and relates to the technical field of batteries, the battery pack shell comprises a rectangular panel and a plurality of side plates, in the long side direction of the rectangular panel, a first raised rib is arranged at the first end of the rectangular panel, and a second raised rib is arranged at the second end of the rectangular panel; the projection of the first protruding rib on the rectangular panel and the projection of the second protruding rib on the rectangular panel are symmetrical along the central axis of the rectangular panel in the long side direction and the central axis of the rectangular panel in the short side direction. The first sides of the plurality of side plates are fixedly connected with the edge of the rectangular panel, and the plurality of side plates are connected end to end through the second sides to form an annular assembly; the rectangular panel and the annular assembly are enclosed to form a containing groove, and the containing groove is used for containing the battery cell module. Therefore, the rigidity of the battery pack shell is increased, the vibration effect of the battery pack shell is weaker when the battery pack shell is subjected to external force, and the service life of the battery pack can be prolonged. In addition, the battery cell module can be conveniently contained in the battery pack shell, and the assemblability of the battery pack is improved.

Description

Technical Field

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

[0002] A battery pack is a commonly used power supply device for electrical equipment. It consists of battery cell modules and a battery pack casing that surrounds the battery cell modules. The battery pack casing protects the battery cell modules inside.

[0003] The materials used in existing battery pack casings have a low modulus of elasticity, a large surface area, and a thin thickness, resulting in low stiffness. When using such a battery pack, the casing is prone to deformation, which in turn causes vibration.

[0004] However, when the battery pack casing resonates with its internal components, the casing will collide with the internal components, which will damage the internal structure of the battery pack and reduce its lifespan. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a battery pack shell and a battery pack, wherein the battery pack shell has high rigidity and is not easily deformed, thus exhibiting weak vibration when subjected to external forces. When the battery pack shell is equipped with this battery pack shell, resonance between the battery pack shell and its internal components can be avoided, thereby preventing collisions between the battery pack shell and its internal components, thus avoiding damage to the internal structure of the battery pack and extending the service life of the battery pack.

[0006] To achieve the above objectives, this utility model is implemented as follows:

[0007] In a first aspect, this utility model provides a battery pack housing, which includes a rectangular panel and multiple side panels. Along the long side of the rectangular panel, a first rib is provided at a first end, and a second rib is provided at a second end. The projections of the first rib onto the rectangular panel and the projections of the second rib onto the rectangular panel are symmetrical along the central axis of the long side and the central axis of the short side of the rectangular panel. The first sides of the multiple side panels are fixedly connected to the edge of the rectangular panel, and the second sides of adjacent side panels are fixedly connected. The multiple side panels are connected end-to-end via their second sides to form an annular assembly. The rectangular panel and the annular assembly enclose a receiving groove for accommodating a battery cell module.

[0008] Optionally, the sides of the first and second reinforcing ribs closest to the long side of the rectangular panel are straight sides, and the straight sides are parallel to the long side of the rectangular panel.

[0009] The two straight sides of the first reinforcing rib and the two straight sides of the second reinforcing rib are symmetrical about the central axis along the long side of the rectangular panel.

[0010] Optionally, the side of the first rib closest to the center of the rectangular panel is a first arc edge, and the center of the circle corresponding to the first arc edge is located on the side of the first arc edge closest to the center of the rectangular panel.

[0011] The second rib is a second arc edge on the side closest to the center of the rectangular panel, and the first arc edge and the second arc edge are symmetrical about the center of the rectangular panel.

[0012] Optionally, the side of the first rib away from the center of the rectangular panel is a first curved edge, and the middle part of the first curved edge bends toward the center of the rectangular panel.

[0013] The side of the second rib that is away from the center of the rectangular panel is the second curved edge, and the first curved edge and the second curved edge are symmetrical about the center of the rectangular panel.

[0014] Optionally, the thickness of both the first and second reinforcing ribs is d, and both are recessed towards the receiving groove; the value of d is in the range of 3mm≤d≤4mm.

[0015] Optionally, between the first reinforcing rib and the second reinforcing rib, the rectangular panel is further provided with an annular reinforcing rib, the annular reinforcing rib being symmetrical about the center of the rectangular panel.

[0016] Optionally, the annular reinforcing rib is in the shape of a rectangular ring, and the long side of the rectangular ring is parallel to the long side of the rectangular panel.

[0017] Optionally, the inner and outer corners of the four corners of the rectangular ring are rounded; the inner and outer rounded corners at the same corner of the rectangular ring correspond to the same center.

[0018] Optionally, the value range of the long side L of the rectangular panel is: 450mm≤L≤600mm;

[0019] The range of the shorter side H of the rectangular panel is: 200mm≤H≤250mm;

[0020] The width D of the annular reinforcing bar is in the range of 40mm≤D≤60mm.

[0021] Optionally, the plurality of side panels include two first side panels disposed opposite each other and two second side panels disposed opposite each other;

[0022] The first side plate is disposed along the long side of the rectangular panel, and the second side plate is disposed along the short side of the rectangular panel;

[0023] The two first side plates and the two second side plates are joined together to form the annular assembly.

[0024] Optionally, the surfaces of both the first side panel and the second side panel are perpendicular to the surface of the rectangular panel.

[0025] Optionally, the first side plate is provided with a plurality of reinforcing ribs on the side away from the receiving groove, the reinforcing ribs being perpendicular to the rectangular panel and protruding in the direction away from the receiving groove;

[0026] Multiple reinforcing ribs are spaced apart along the long side of the rectangular panel.

[0027] Optionally, the second side plate is provided with a first rectangular wiring hole and a second rectangular wiring hole;

[0028] Along the short side of the rectangular panel, the first rectangular wiring hole and the second rectangular wiring hole have different lengths; along the direction perpendicular to the rectangular panel, the first rectangular wiring hole and the second rectangular wiring hole have the same width.

[0029] Secondly, this utility model embodiment also provides a battery pack, the battery pack including the battery pack shell and the cell module as described in any of the first aspects above, the cell module being housed in the receiving groove.

[0030] In this embodiment, the battery pack casing includes a rectangular panel. A first rib is provided at the first end of the rectangular panel along its long side, and a second rib is provided at the second end. The presence of the first and second ribs increases the moment of inertia of the rectangular panel's cross-section, making it less prone to bending. This increases the rigidity of the battery pack casing, resulting in weaker vibration under external forces.

[0031] Next, since the projections of the first rib on the rectangular panel and the second rib on the rectangular panel are symmetrical along the central axis of both the long and short sides of the rectangular panel, the external forces acting on the rectangular panel of the battery pack casing during actual use are symmetrical along the central axis of both the long and short sides of the rectangular panel. The symmetrical arrangement of the first and second ribs perfectly matches the distribution of external forces acting on the rectangular panel, making the battery pack casing more stable under external forces. This further improves the rigidity of the battery pack casing and reduces vibration under external forces. When the battery pack is equipped with this casing, resonance between the battery pack casing and its internal components can be avoided, thus preventing collisions and damage to the internal structure of the battery pack, thereby extending the battery pack's lifespan.

[0032] Next, since the battery pack casing includes multiple side plates, the first edge of each side plate is fixedly connected to the edge of the rectangular panel, and the second edges of adjacent side plates are fixedly connected, the multiple side plates are connected end to end through the second edges to form a ring assembly; the rectangular panel and the ring assembly enclose a receiving groove for accommodating the battery cell module. In this way, the battery pack casing can better match the battery cell module, making it easier for the battery cell module to be housed in the battery pack casing, thus improving the assemblability of the battery pack.

[0033] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0034] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0035] Figure 1 This is a schematic diagram of the structure of a battery pack casing provided in an embodiment of the present invention;

[0036] Figure 2 yes Figure 1 A schematic diagram of the structure of the rectangular panel;

[0037] Figure 3 yes Figure 1 Schematic diagram of the structure of the first side plate;

[0038] Figure 4 yes Figure 1 Schematic diagram of the structure of the second side plate;

[0039] Figure 5This is a structural diagram of a second side plate with a first rectangular wiring hole and a second rectangular wiring hole.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Rectangular panel, 11-First rib, 111-First rounded edge, 112-First curved edge, 12-Second rib, 121-Second rounded edge, 122-Second curved edge, 13-Annular rib, 131-Rounded corner, 2-Annular assembly, 21-Side panel, 22-First side panel, 23-Second side panel, 231-First rectangular wiring hole, 232-Second rectangular wiring hole, 24-Reinforcing rib, 100-Battery pack casing. Detailed Implementation

[0042] 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, 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.

[0043] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] The battery pack casing and battery pack provided in this utility model embodiment will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0045] Figure 1 This is a structural schematic diagram of a battery pack casing 100 provided in an embodiment of the present invention. Figure 2 yes Figure 1 A schematic diagram of the structure of the rectangular panel 1.

[0046] See Figure 1 and Figure 2The battery pack casing 100 includes a rectangular panel 1 and multiple side panels 21. Along the long side of the rectangular panel 1, a first rib 11 is provided at the first end of the rectangular panel 1, and a second rib 12 is provided at the second end of the rectangular panel 1. The projections of the first rib 11 onto the rectangular panel 1 and the projections of the second rib 12 onto the rectangular panel surface are symmetrical along the central axis of both the long and short sides of the rectangular panel 1. The first sides of each of the multiple side panels 21 are fixedly connected to the edge of the rectangular panel 1, and the second sides of adjacent side panels 21 are fixedly connected. The multiple side panels 21 are connected end-to-end via their second sides to form an annular assembly 2. The rectangular panel 1 and the annular assembly 2 enclose a receiving groove for accommodating the battery cell module.

[0047] In this embodiment, the battery pack casing 100 includes a rectangular panel 1. A first rib 11 is provided at the first end of the rectangular panel 1 along its long side, and a second rib 12 is provided at the second end. The presence of the first rib 11 and the second rib 12 on the rectangular panel 1 increases the moment of inertia of the cross-section, making the rectangular panel 1 less prone to bending. This increases the stiffness of the battery pack casing 100, resulting in weaker vibration when subjected to external forces.

[0048] Next, since the projections of the first rib 11 onto the rectangular panel 1 and the second rib 12 onto the rectangular panel are symmetrical along the central axis of both the long and short sides of the rectangular panel 1, in actual use, the external forces acting on the rectangular panel 1 of the battery pack casing 100 are symmetrical along the central axis of both the long and short sides of the rectangular panel 1. The symmetrical arrangement of the first rib 11 and the second rib 12 perfectly matches the distribution of external forces acting on the rectangular panel 1, making the battery pack casing more stable under external forces. This further improves the rigidity of the battery pack casing 100 and reduces the vibration effect of the battery pack casing 100 under external forces. When the battery pack casing 100 is equipped with the battery pack, resonance between the battery pack casing 100 and its internal components can be avoided, thus preventing collisions between the battery pack casing 100 and its internal components. This avoids damage to the internal structure of the battery pack and extends its service life.

[0049] Next, since the battery pack casing 100 includes multiple side plates 21, the first side of each side plate 21 is fixedly connected to the edge of the rectangular panel 1, and the second side of two adjacent side plates 21 is fixedly connected, the multiple side plates 21 are connected end to end through the second side to form an annular assembly 2; the rectangular panel 1 and the annular assembly 2 enclose a receiving groove, which is used to receive the battery cell module. In this way, the battery pack casing 100 can better match the battery cell module, making it easier for the battery cell module to be housed in the battery pack casing 100, thus improving the assemblability of the battery pack.

[0050] It should be noted that the number of the aforementioned side plates 21 can be three, four, five, or more, and this application embodiment does not limit this.

[0051] It should also be noted that the battery pack casing 100 is made of PP (Polypropylene) plastic, which has an elastic modulus of 890 MPa, a Poisson's ratio of 0.4203, and a density of 900 kg / m³. Furthermore, the battery pack casing 100 can also be made of other types of materials, and this application embodiment does not limit this.

[0052] Alternatively, in some embodiments, see Figure 1 and Figure 2 The first reinforcing rib 11 and the second reinforcing rib 12 have straight sides near the long side of the rectangular panel 1, and these straight sides are parallel to the long side of the rectangular panel 1. The two straight sides of the first reinforcing rib 11 and the two straight sides of the second reinforcing rib 12 are symmetrical about the central axis along the long side of the rectangular panel 1.

[0053] By performing a simulated stress analysis on the rectangular panel 1 of the battery pack casing 100, the stress distribution area of ​​the rectangular panel 1 can be obtained. This stress distribution area is generally rectangular, with its two longer sides parallel to the longer sides of the rectangular panel 1. Furthermore, the magnitude of the stress at each location within this stress distribution area is symmetrical along the central axis of the longer side of the rectangular panel 1. Therefore, the straight edges of the first rib 11 and the second rib 12 are perfectly matched to the aforementioned stress distribution area. Specifically, ribs are provided in areas of higher stress on the rectangular panel 1, increasing the rigidity of the rectangular panel 1 and consequently improving the rigidity of the battery pack casing 100.

[0054] Alternatively, in some embodiments, see Figure 1 and Figure 2 The first rib 11 has a first arc edge 111 on the side closest to the center of the rectangular panel 1, and the center of the circle corresponding to the first arc edge 111 is located on the side of the first arc edge 111 closest to the center of the rectangular panel 1. The second rib 12 has a second arc edge 121 on the side closest to the center of the rectangular panel 1, and the first arc edge 111 and the second arc edge 121 are symmetrical about the center of the rectangular panel 1.

[0055] By performing a simulated stress analysis on the rectangular panel 1 of the battery pack casing 100, the stress distribution region of the rectangular panel 1 can be obtained. This stress distribution region is generally rectangular in shape and is distributed outwards from the center of the rectangular panel 1 in layers of concentric ellipses, and is symmetrical about the center of the rectangular panel 1. The centers of the ellipses corresponding to the first and second arcs coincide with the center of the stress distribution region. Thus, the stress on the rectangular panel 1 is approximately the same along the trajectory of the first or second arc, therefore the trajectories of the first and second arcs correspond to a certain critical stress value. This allows the structure of the rectangular panel 1 to adapt to stress changes, thereby improving the stiffness of the rectangular panel 1 and thus increasing the stiffness of the battery pack casing 100.

[0056] Alternatively, in some embodiments, see Figure 1 and Figure 2 The first rib 11 is a first curved edge 112 on the side away from the center of the rectangular panel 1, and the middle part of the first curved edge 112 bends towards the center of the rectangular panel 1. The second rib 12 is a second curved edge 122 on the side away from the center of the rectangular panel 1, and the first curved edge 112 and the second curved edge 122 are symmetrical about the center of the rectangular panel 1.

[0057] A structural model of the battery pack casing 100 was established using simulation software. When the middle of the first curved edge 112 of the rectangular panel 1 bends towards the center of the rectangular panel 1, the stiffness of the battery pack casing 100 increases significantly. Then, by bending the middle of the second curved edge 122 of the rectangular panel 1 towards the center of the rectangular panel 1, the stiffness of the battery pack casing 100 increases further. Furthermore, since the first curved edge 112 and the second curved edge 122 are symmetrical about the center of the rectangular panel 1, when the rectangular panel 1 is subjected to uniform force, the stress at various points on the rectangular panel 1 is symmetrical about the center of the rectangular panel 1, thereby improving the stability of the battery pack casing 100.

[0058] Alternatively, in some embodiments, see Figure 1 and Figure 2 The thickness of the first reinforcing rib 11 and the second reinforcing rib 12 is d, and both are recessed towards the receiving groove; the value range of d is: 3mm≤d≤4mm.

[0059] In this embodiment, since both the first rib 11 and the second rib 12 are recessed towards the receiving groove, compared to a design where both the first rib 11 and the second rib 12 are protruding away from the receiving groove, this makes the first rib 11 and the second rib 12 less susceptible to external forces. Therefore, the structure of the battery pack casing 100 is more stable. Furthermore, the aforementioned design of recessing the first rib 11 and the second rib 12 can also reduce the overall volume of the battery pack, thereby saving space in the vehicle body.

[0060] After establishing a structural model of the battery pack casing 100 using simulation software, a stress analysis was performed on the structural model. When the thickness d of the first rib 11 and the second rib 12 is in the range of 3mm≤d≤4mm, the battery pack casing 100 has the maximum stiffness while ensuring reasonable deformation performance.

[0061] It should be noted that the deformation of the battery pack casing 100 is minimized when the thickness d is 3.5mm.

[0062] Alternatively, in some embodiments, see Figure 1 and Figure 2 Between the first reinforcing bar 11 and the second reinforcing bar 12, the rectangular panel 1 is also provided with an annular reinforcing bar 13, which is symmetrical about the center of the rectangular panel 1.

[0063] By performing a simulated stress analysis on the rectangular panel 1 of the battery pack casing 100, the stress distribution area of ​​the rectangular panel 1 can be obtained. This stress distribution area is rectangular in shape and symmetrical about the center of the rectangular panel 1. The annular rib 13 can then be matched with this stress distribution area, further increasing the stiffness of the rectangular panel 1, and thus further increasing the overall stiffness of the battery pack casing 100.

[0064] Alternatively, in some embodiments, see Figure 1 and Figure 2 The ring-shaped rib 13 is a rectangular ring, and the long side of the rectangular ring is parallel to the long side of the rectangular panel 1.

[0065] By performing a simulated stress analysis on the rectangular panel 1 of the battery pack casing 100, the stress distribution region of the rectangular panel 1 can be obtained. This stress distribution region is generally rectangular, with its two longer sides parallel to the longer sides of the rectangular panel 1. Furthermore, the magnitude of the stress at each location within this stress distribution region is symmetrical along the central axis of the longer side of the rectangular panel 1. Therefore, the shape of the aforementioned rectangular ring perfectly matches the rectangular stress distribution region, improving the stiffness of the rectangular panel 1 and consequently increasing the stiffness of the battery pack casing 100.

[0066] Alternatively, in some embodiments, see Figure 1 and Figure 2 The inner and outer sides of the four corners of the rectangular ring are all provided with rounded corners 131; the inner and outer rounded corners 131 at the same corner of the rectangular ring correspond to the same center.

[0067] By performing a simulated stress analysis on the rectangular panel 1 of the battery pack casing 100, the stress distribution area of ​​the rectangular panel 1 can be obtained. This stress distribution area is generally rectangular in shape and is distributed outwards from the center of the rectangular panel 1 in multiple concentric elliptical layers, and is symmetrical about the center of the rectangular panel 1. When rounded corners 131 are provided on the inner and outer sides of the four corners of the rectangular ring, the inner and outer loops formed by the rectangular ring are both elliptical, which perfectly matches the shape of the stress distribution area. This allows the structure of the rectangular panel 1 to adapt to stress changes, thereby improving the stiffness of the rectangular panel 1 and thus increasing the stiffness of the battery pack casing 100.

[0068] Alternatively, in some embodiments, see Figure 1 and Figure 2 The range of values ​​for the long side L of the rectangular panel 1 is: 450mm≤L≤600mm; the range of values ​​for the short side H of the rectangular panel 1 is: 200mm≤H≤250mm; and the range of values ​​for the width D of the annular rib 13 is: 40mm≤D≤60mm.

[0069] The range of values ​​for the long side L and the short side H of the rectangular panel 1 are matched to the dimensions of the battery cell module. A structural model of the battery pack casing 100 was established using simulation software, with the long side L of the rectangular panel 1 set to 450mm ≤ L ≤ 600mm and the short side H set to 200mm ≤ H ≤ 250mm. Then, the width D of the annular rib 13 in the structural model was adjusted. After repeated experiments, the rectangular panel 1 exhibited the greatest stiffness when the width D of the annular rib 13 was within the range of 40mm ≤ D ≤ 60mm. That is, the optimal range for the width D of the annular rib 13 is 40mm ≤ D ≤ 60mm, at which point the battery pack casing 100 exhibits the greatest stiffness.

[0070] Alternatively, in some embodiments, see Figure 1 and Figure 2 The multiple side panels 21 include two first side panels 22 and two second side panels 23 arranged opposite to each other; the first side panels 22 are arranged along the long side of the rectangular panel 1, and the second side panels 23 are arranged along the short side of the rectangular panel 1; the two first side panels 22 and the two second side panels 23 enclose each other to form an annular component 2.

[0071] In this embodiment, the annular component 2 formed by the two opposing first side plates 22 and the two opposing second side plates 23 is used to clamp the side of the cell module, thereby enabling the battery pack shell 100 to be better connected to the cell module as a whole, thus enhancing the overall stability of the battery pack.

[0072] Alternatively, in some embodiments, see Figure 1 and Figure 2 The surfaces of the first side panel 22 and the second side panel 23 are both perpendicular to the surface of the rectangular panel 1.

[0073] Since the battery cell module is generally a cuboid, when the surfaces of the first side plate 22 and the second side plate 23 are both perpendicular to the surface of the rectangular panel 1, the receiving groove formed by the ring component 2 and the rectangular panel 1 is cuboid in shape. In this way, the shape of the receiving groove can better match the shape of the battery cell module, making it easier to assemble the battery pack casing 100.

[0074] Alternatively, in some embodiments, see Figure 1 , Figure 3 and Figure 4 The first side panel 22 has multiple reinforcing ribs 24 on the side opposite to the receiving groove. The reinforcing ribs 24 are perpendicular to the rectangular panel 1 and protrude in the direction opposite to the receiving groove. The multiple reinforcing ribs 24 are spaced apart along the long side of the rectangular panel 1.

[0075] Because multiple reinforcing ribs 24 are provided on the side of the first side plate 22 away from the receiving groove, and these reinforcing ribs 24 are spaced apart along the long side of the rectangular panel 1, the lateral stiffness of the first side plate 22 is increased, and the deformation of the first side plate 22 in the direction of approaching or moving away from the receiving groove is reduced. Therefore, the stiffness of the battery pack casing 100 is further increased.

[0076] Next, the reinforcing rib 24 protrudes in the direction away from the receiving groove. This prevents the reinforcing rib 24 from occupying the space of the receiving groove, making it easier to assemble the battery pack casing 100 with the cell module.

[0077] Alternatively, in some embodiments, see Figure 1 , Figure 3 and Figure 4 The second side panel 23 is provided with a first rectangular wiring hole 231 and a second rectangular wiring hole 232; along the short side direction of the rectangular panel 1, the first rectangular wiring hole 231 and the second rectangular wiring hole 232 have different lengths; along the direction perpendicular to the rectangular panel 1, the first rectangular wiring hole 231 and the second rectangular wiring hole 232 have the same width.

[0078] Since battery cell modules typically include charging and power transmission lines, both of which need to pass through the battery pack casing, and the cross-sections of the charging and power transmission lines are generally different, the required perforations differ. Therefore, the aforementioned first rectangular wiring hole 231 and second rectangular wiring hole 232 perfectly meet these requirements. Furthermore, because the second side plate 23 is relatively short, placing the first rectangular wiring hole 231 and second rectangular wiring hole 232 on the second side plate 23 makes the structure of the battery pack casing 100 more stable.

[0079] This application also discloses a battery pack, which includes any of the above-described battery pack shell 100 and a cell module, with the cell module housed in a receiving groove.

[0080] Because the battery pack casing 100 has high rigidity, it exhibits weak vibration when subjected to external forces. When the battery pack casing 100 is used, resonance between the casing and its internal components is prevented, thus avoiding collisions and preventing damage to the internal structure of the battery pack, thereby extending its lifespan.

[0081] Next, since the battery pack housing 100 can be better matched with the cell module, and the cell module can be easily housed in the battery pack housing 100, the assemblability of the battery pack is improved.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack casing (100), characterized in that, include: A rectangular panel (1) has a first rib (11) at its first end and a second rib (12) at its second end along the long side of the rectangular panel (1). The projections of the first rib (11) on the rectangular panel (1) and the projections of the second rib (12) on the rectangular panel are symmetrical along the central axis of the long side and the central axis of the short side of the rectangular panel (1). Multiple side plates (21) are provided, with the first side of each side plate (21) fixedly connected to the edge of the rectangular panel (1), and the second side of two adjacent side plates (21) fixedly connected. The multiple side plates (21) are connected end to end through the second side to form an annular assembly (2). The rectangular panel (1) and the annular assembly (2) are enclosed to form a receiving groove, which is used to receive the battery cell module.

2. The battery pack casing (100) according to claim 1, characterized in that, The first rib (11) and the second rib (12) are straight sides near the long side of the rectangular panel (1), and the straight sides are parallel to the long side of the rectangular panel (1). The two straight sides of the first reinforcing bar (11) and the two straight sides of the second reinforcing bar (12) are symmetrical about the central axis of the long side of the rectangular panel (1).

3. The battery pack casing (100) according to claim 2, characterized in that, The first rib (11) is located on the side of the rectangular panel (1) closest to the center of the first rib (111), which is a first arc edge (111). The center of the first arc edge (111) is located on the side of the first arc edge (111) closest to the center of the rectangular panel (1). The second rib (12) is a second arc edge (121) on the side near the center of the rectangular panel (1). The first arc edge (111) and the second arc edge (121) are symmetrical about the center of the rectangular panel (1).

4. The battery pack casing (100) according to claim 3, characterized in that, The side of the first rib (11) away from the center of the rectangular panel (1) is the first curved edge (112), and the middle part of the first curved edge (112) bends toward the center of the rectangular panel (1); The second rib (12) is a second curved edge (122) on the side away from the center of the rectangular panel (1). The first curved edge (112) and the second curved edge (122) are symmetrical about the center of the rectangular panel (1).

5. The battery pack casing (100) according to claim 4, characterized in that, The thickness of the first rib (11) and the second rib (12) is d, and both are recessed towards the receiving groove; the value range of d is: 3mm≤d≤4mm.

6. The battery pack casing (100) according to any one of claims 1-5, characterized in that, Between the first reinforcing bar (11) and the second reinforcing bar (12), the rectangular panel (1) is also provided with an annular reinforcing bar (13), which is symmetrical about the center of the rectangular panel (1).

7. The battery pack casing (100) according to claim 6, characterized in that, The annular reinforcing rib (13) is a rectangular ring, and the long side of the rectangular ring is parallel to the long side of the rectangular panel (1).

8. The battery pack housing (100) according to claim 7, characterized in that, The rectangular ring has rounded corners (131) on both the inner and outer sides of its four corners; the rounded corners (131) on the inner and outer sides of the same corner of the rectangular ring correspond to the same center.

9. The battery pack casing (100) according to any one of claims 7-8, characterized in that, The range of the long side L of the rectangular panel (1) is: 450mm≤L≤600mm; The value range of the short side H of the rectangular panel (1) is: 200 mm ≤ H ≤ 250 mm; The value range of the width D of the annular rib (13) is: 40 mm ≤ D ≤ 60 mm.

10. The battery pack housing (100) according to claim 1, characterized in that, The multiple side plates (21) include two relatively arranged first side plates (22) and two relatively arranged second side plates (23); The first side plate (22) is arranged along the long side direction of the rectangular panel (1), and the second side plate (23) is arranged along the short side direction of the rectangular panel (1); The two first side plates (22) and the two second side plates (23) enclose to form the annular component (2).

11. The battery pack housing (100) according to claim 10, characterized in that, The plate surfaces of the first side plate (22) and the second side plate (23) are both perpendicular to the plate surface of the rectangular panel (1).

12. The battery pack housing (100) according to claim 11, characterized in that, On the side of the first side plate (22)背离 the receiving groove, a plurality of reinforcing ribs (24) are provided, and the reinforcing ribs (24) are perpendicular to the rectangular panel (1) and protrude in the direction away from the receiving groove; The plurality of reinforcing ribs (24) are arranged at intervals along the long side direction of the rectangular panel (1).

13. The battery pack housing (100) according to claim 11, characterized in that, The second side plate (23) is provided with a first rectangular wiring hole (231) and a second rectangular wiring hole (232); Along the short side direction of the rectangular panel (1), the lengths of the first rectangular wiring hole (231) and the second rectangular wiring hole (232) are different; along the direction perpendicular to the rectangular panel (1), the widths of the first rectangular wiring hole (23!) and the second rectangular wiring hole (232) are the same.

14. A battery pack, characterized in that, It includes the battery pack housing (100) according to any one of claims 1-13 and a battery cell module, and the battery cell module is accommodated in the receiving groove.

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