Distribution box shell and distribution box

Abstract

The utility model relates to a distribution box shell and a distribution box, and belongs to the technical field of battery manufacturing. The power distribution box shell comprises a box body and a cover body, first clamping parts are arranged on the two sides of the cover body in the Y direction, second clamping parts are arranged on the positions, corresponding to the first clamping parts, of the outer walls of the two sides of the box body in the Y direction, and the first clamping parts and the second clamping parts are matched in a buckled mode. The cover body and the box body are fixedly connected in the direction Z; the cover body is further provided with a plurality of third clamping parts, and the third clamping parts extend into the box body and abut against the inner wall of the box body in the Y direction so as to eliminate the movement allowance of the cover body and the box body in the Y direction and the Z direction. The utility model further provides a power distribution box which comprises the power distribution box shell. The cover body and the box body are compactly assembled, so that internal electrical parts can be reliably protected, and better safety performance is achieved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a power distribution box housing and a power distribution box. Background Technology

[0002] With the rapid development of the new energy field and electric vehicles, lithium batteries have advantages such as high energy density, high voltage, and environmental friendliness. In recent years, they have gradually replaced traditional energy industries, and the manufacturing level has developed rapidly, which has put forward higher requirements for the manufacturing process and safety performance of components.

[0003] The battery drive unit (BTU) is a crucial component of the battery pack, containing the battery pack, motor, controller, and other components housed within a casing. These components convert electrical energy into mechanical energy, thus powering the electric vehicle. However, current manufacturing capabilities for BTU casings are limited, resulting in poor assembly precision between the cover and the casing. This inadequate protection of the internal electrical components and reduces the overall safety performance of the battery pack. Utility Model Content

[0004] Therefore, this application proposes a distribution box housing and a distribution box, wherein the cover and the box are assembled compactly, which can reliably protect the internal electrical components and has good safety performance.

[0005] The distribution box housing of some embodiments of this application includes a box body and a cover. The cover fits over the opening of the box body along direction Z. The cover has first engaging portions on both sides in direction Y. The box body has second engaging portions on the outer walls on both sides in direction Y at positions corresponding to the first engaging portions. The first engaging portions and the second engaging portions are engaged to achieve a fixed connection between the cover and the box body along direction Z. Direction Z is the height direction of the box body, and direction Y is the width direction of the box body. The cover body also has a plurality of third engaging portions, which extend into the box body and abut against the inner wall of the box body along direction Y.

[0006] Optionally, the third engaging portion includes an engaging member and an elastic member. One end of the engaging member is connected to the cover, and the other end extends toward the inner wall of the housing. Along the direction Y, the elastic member is disposed between the engaging member and the inner wall of the housing, wherein the elastic member is configured to increase the frictional force when the cover and the housing move relative to each other.

[0007] Optionally, the engaging component includes a connecting arm and a supporting structure. The connecting arm is connected to the cover along the Z direction, and the supporting structure protrudes from the side of the connecting arm near the box along the Y direction. The elastic element is sleeved on the surface of the supporting structure and is bonded to the supporting structure.

[0008] Optionally, the connecting arm includes a first part and a second part. The first part includes a first end and a second end. The first end is connected to the cover. The cross-sectional area of ​​the first part gradually decreases from the first end to the second end. The second end is connected to the second part. The second part is connected to the support structure.

[0009] Optionally, the second part includes a first side and a second side, the first side being connected to the support structure, and the second side forming a plurality of groove structures.

[0010] Optionally, the first engaging portion includes a slot structure, and the second engaging portion includes a sliding groove and a protrusion structure. The protrusion structure is disposed in the sliding groove, the sliding groove is configured to allow the first engaging portion to slide in along the direction Z, and the protrusion structure is configured to snap into the slot structure.

[0011] Optionally, the third engaging portion is provided with a guide surface, which is inclined. During the process of the cover closing onto the box, the guide surface is configured to slide and engage with the inner surface of the box in the Z direction to guide the first engaging portion and the second engaging portion to snap together.

[0012] Optionally, two third engaging portions are provided. The third engaging portions are provided on the side of the cover facing the box body, and along the edge of the cover body, the two third engaging portions are symmetrically arranged on both sides of the first engaging portion.

[0013] Optionally, the cover includes a body and an edge portion, the edge portion extending from the edge of the body toward the box along the direction Z, and the first engaging portion and the third engaging portion are both connected to the edge portion.

[0014] The power distribution box of some embodiments of this application includes: a power distribution box housing as described in some embodiments of this application; and electrical components enclosed inside the power distribution box housing.

[0015] Compared with existing technologies, this solution has the following advantages:

[0016] In this embodiment of the application, a third engaging part is added to the distribution box housing based on the first engaging part and the second engaging part. The third engaging part extends into the box body and abuts against the inner wall of the box body. This not only cancels the movement margin of the box body and the cover in the Y direction, but also increases the frictional force when the cover and the box body move relative to each other, and reduces the movement margin of the box body and the cover in the Z direction. This ensures that the cover and the box body are assembled compactly, which can reliably protect the electrical components inside the distribution box housing and has good safety performance.

[0017] 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

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the power distribution box housing provided in an embodiment of this application;

[0020] Figure 2 A partial structural schematic diagram of the cover of the power distribution box housing provided in an embodiment of this application;

[0021] Figure 3 A first-view structural schematic diagram of the third engaging portion of the power distribution box housing provided in an embodiment of this application;

[0022] Figure 4 A second view of the structure of the third engaging portion of the power distribution box housing provided in an embodiment of this application;

[0023] Figure 5 A cross-sectional view of the third engaging portion of the power distribution box housing abutting against the inner wall of the box body, provided in an embodiment of this application;

[0024] Figure 6 A cross-sectional view showing the engagement of the first engaging portion and the second engaging portion of the power distribution box housing provided in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the structure of the guide surface of the third engaging portion of the first type of distribution box housing provided in the embodiments of this application;

[0026] Figure 8 This is a schematic diagram of the guide surface of the third engaging portion of a second type of distribution box housing provided in an embodiment of this application.

[0027] Icons: 100 - Distribution box housing; 110 - Box body; 111 - Second engaging part; 1111 - Slide groove; 1112 - Protruding structure; 112 - Side wall; 1121 - First surface; 113 - Bottom wall; 120 - Cover; 121 - Body; 122 - Edge; 123 - First engaging part; 1231 - Slot structure; 124 - Third engaging part; 1241 - Engaging element; 1242 - Elastic element; 1243 - Connecting arm; 1244 - Support structure; 1245 - Guide surface; 125 - First part; 1251 - First end; 1252 - Second end; 126 - Second part; 1261 - First side; 1262 - Second side; 1263 - Groove structure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the 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.

[0030] In related technologies, the box body 110 and cover 120 of the distribution box housing 100 are both made of plastic and injection molded in a mold. After demolding, shrinkage may cause deformation, resulting in assembly gaps between the box body 110 and the cover 120. When vibration or shaking occurs, the entire distribution box housing 100 may become loose, posing a certain safety hazard.

[0031] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, in some embodiments of this application, the distribution box housing 100 includes a box body 110 and a cover 120. The cover 120 covers the opening end of the box body 110 along the Z direction. The cover 120 has first engaging portions 123 on both sides in the Y direction. The box body 110 has second engaging portions 111 on the outer walls on both sides in the Y direction, corresponding to the first engaging portions 123. The first engaging portions 123 and the second engaging portions 111 are engaged to achieve a fixed connection between the cover 120 and the box body 110 along the Z direction, where Z is the height direction of the box body 110 and Y is the width direction of the box body 110. The cover 120 also has a plurality of third engaging portions 124, which extend into the box body 110 and abut against the inner wall of the box body 110 along the Y direction to eliminate any movement allowance between the cover 120 and the box body 110 in the Y and Z directions.

[0032] The length direction of the box 110 is direction X, the width direction is direction Y, and the height direction is direction Z. The box 110 includes a side wall 112 and a bottom wall 113. The side wall 112 extends from the edge of the bottom wall 113 along direction Z to form a receiving cavity. The second engaging part 111 is provided on the outer surface of the side wall 112 away from the receiving cavity, i.e., on the outer wall. The inner wall of the box 110 refers to the inner surface of the side wall 112 facing the receiving cavity.

[0033] In this embodiment, the distribution box housing 100 adds a third engaging portion 124 to the first engaging portion 123 and the second engaging portion 111. The third engaging portion 124 abuts against the inner wall of the housing 110. The first engaging portion 123, the second engaging portion 111, and the third engaging portion 124 simultaneously limit the inner and outer movement of the distribution box housing 100, restricting the movement of the cover 120 and the housing 110 in the Y direction. This can counteract the excess movement of the housing 110 and the cover 120 in the Y direction. Furthermore, due to the friction between the third engaging part 124 and the inner wall of the housing 110, the difficulty of moving the cover 120 and the housing 110 along the Z direction increases, which also offsets the movement margin of the housing 110 and the cover 120 in the Z direction. This ensures that the cover 120 and the housing 110 are assembled compactly, and the cover 120 and the housing 110 are not easily separated during the shaking of the distribution box. This can reliably protect the electrical components inside the distribution box housing 100 and has good safety performance.

[0034] like Figure 1 , Figure 2 and Figure 6 As shown, in some embodiments of this application, the first engaging portion 123 includes a slot structure 1231, and the second engaging portion 111 includes a protrusion structure 1112 protruding from the outer surface of the sidewall 112. The protrusion structure 1112 and the slot structure 1231 engage with each other to achieve the engagement and fixation of the first engaging portion 123 and the second engaging portion 111, thereby achieving directional Z-limiting.

[0035] In some other embodiments of this application, the first engaging portion 123 includes a slot structure 1231, and the second engaging portion 111 includes a slide groove 1111 and a protrusion structure 1112. The protrusion structure 1112 is disposed in the slide groove 1111, the slide groove 1111 is configured to allow the first engaging portion 123 to slide in the direction Z, and the protrusion structure 1112 is configured to be snapped into the slot structure 1231.

[0036] In other words, the second engaging part 111 also includes a groove 1111 extending downward from the top of the side wall 112 in the direction Z. The protruding structure 1112 protrudes from the groove 1111, and the first engaging part 123 slides into the groove 1111 from top to bottom, so as to realize the engaging engagement between the groove structure 1231 and the protruding structure 1112. This not only improves the ease of installation, but also avoids the shell volume being too large and wasting space.

[0037] In some embodiments of this application, the outer walls of the box 110 along the Y direction are provided with first engaging portions 123, and multiple first engaging portions 123 are provided at intervals along the X direction on each side. Each first engaging portion 123 has a corresponding second engaging portion 111 and a third engaging portion 124.

[0038] In other embodiments, the side of the housing 110 along the X direction may also be provided with a first engaging portion 123, and a second engaging portion 111 and a third engaging portion 124 corresponding to the first engaging portion 123, so as to uniformly fix the housing 110 and the cover 120 in the circumferential direction.

[0039] like Figure 2 As shown, in some embodiments of this application, the cover 120 includes a body 121 and an edge portion 122. The edge portion 122 extends from the edge of the body 121 toward the box 110 along the direction Z. The first engaging portion 123 and the third engaging portion 124 are both connected to the edge portion 122.

[0040] In other words, both the first engaging portion 123 and the third engaging portion 124 are formed on the edge portion 122.

[0041] This configuration ensures that the first engaging part 123 and the third engaging part 124 have sufficient assembly area with the inner and outer walls of the housing 110, thereby ensuring reliable assembly of the cover 120 with the housing 110 without increasing the size of the cover 120 in the Y direction and preventing space waste.

[0042] In other embodiments, the first engaging portion 123 and the third engaging portion 124 may also be formed on the body 121.

[0043] like Figure 2As shown, in some embodiments of this application, two third engaging portions 124 are provided. The third engaging portions 124 are located on the side of the cover 120 facing the housing 110, symmetrically arranged on both sides of the first engaging portion 123 along the edge of the cover 120. By symmetrically arranging the third engaging portions 124 on both sides of the first engaging portion 123, the force can be evenly distributed, improving the connection stability of the distribution box housing 100. When subjected to external force, the symmetrically arranged third engaging portions 124 can evenly distribute the force to each third engaging portion 124, avoiding excessive local force that could cause damage or loosening of the connection.

[0044] Each first engaging portion 123 is correspondingly provided with one second engaging portion 111 and two third engaging portions 124. The second engaging portion 111 engages with the corresponding first engaging portion 123, and the two third engaging portions 124 are respectively disposed on both sides of the first engaging portion 123, which can provide fixing force and restraint from two opposite directions, effectively preventing the distribution box housing 100 from opening due to uneven force during vibration. Moreover, the third engaging portions 124 located on both sides of the first engaging portion 123 can disperse stress to two points when subjected to external force, avoiding local stress concentration that could damage the distribution box housing 100.

[0045] In other embodiments, the number of third engaging portions 124 corresponding to each first engaging portion 123 can also be four, six, etc. The more the number, the more secure and reliable the connection between the cover 120 and the housing 110. Moreover, for the distribution box housing 100, which requires sealing, providing multiple third engaging portions 124 can more effectively ensure the sealing effect.

[0046] like Figure 3 As shown, in some embodiments of this application, the third engaging portion 124 includes an engaging member 1241 and an elastic member 1242. One end of the engaging member 1241 is connected to the cover 120, and the other end extends toward the inner wall of the housing 110. Along the Y direction, the elastic member 1242 is disposed between the engaging member 1241 and the inner wall of the housing 110. The elastic member 1242 is configured to increase the frictional force when the cover 120 and the housing 110 move relative to each other.

[0047] The elastic element 1242 can be made of rubber, silicone, etc. The snap-fit ​​element 1241 can be integrally injection molded with the cover 120, or it can be a rigid plastic assembled with the cover 120. Specifically, the snap-fit ​​element 1241 and the cover 120 can be connected by means of bonding, snap-fitting, plugging, riveting, etc.

[0048] With this arrangement, the elastic element 1242 is positioned between the engaging element 1241 and the inner wall of the housing 110, elastically abutting against the inner wall of the housing 110. The elastic element 1242 can increase the pressure exerted by the third engaging portion 124 on the inner wall of the housing 110 through its own deformation, thus fixing and positioning the housing 110. Furthermore, due to manufacturing tolerances, the dimensions of the housing 110 and the cover 120 may change. The elastic element 1242 can adapt to these dimensional changes, compensating for gaps or absorbing stress caused by dimensional variations through its elastic deformation. Simultaneously, it can increase the frictional force between the third engaging portion 124 and the inner wall of the housing 110 in the Z direction, helping to prevent the cover 120 from sliding.

[0049] In other embodiments, the third engaging portion 124 may also abut against the inner wall of the housing 110 through a hard surface.

[0050] like Figure 5 As shown, in some embodiments of this application, the engaging member 1241 includes a connecting arm 1243 and a supporting structure 1244. The connecting arm 1243 is connected to the cover 120 along the Z direction, and the supporting structure 1244 protrudes from the connecting arm 1243 along the Y direction on the side near the housing 110. An elastic member 1242 is sleeved on the surface of the supporting structure 1244 and is bonded to the supporting structure 1244. The elastic member 1242 is configured to increase the frictional force between the cover 120 and the housing 110 during relative movement. The elastic member 1242 is made of a material with a large coefficient of friction. The large frictional force of the elastic member 1242 can limit and fix the cover 120 and the housing 110 in the Z direction, thereby improving the overall stability and reliability of the structure. The elastic element 1242 can be made of rubber. Rubber has good resilience, which can reduce assembly loss and assembly difficulty during assembly, and protect the cover 120. At the same time, its relatively large coefficient of friction can also play a limiting role by rubbing against the inner wall of the box 110.

[0051] The connecting arm 1243 and the cover 120 are integrally injection molded; the cross-sectional shape of the connecting arm 1243 can be square, elliptical, etc., and the connecting arm 1243 can be a constant cross-section structure or a variable cross-section structure along the Z direction.

[0052] By supporting the elastic element 1242 with the support structure 1244, the assembly process of the elastic element 1242 and the snap-fit ​​element 1241 can be simplified. The elastic element 1242 can be set with a roughly uniform thickness, and the force is uniform when it abuts against the inner wall of the box 110, resulting in a longer service life.

[0053] In other embodiments, the support structure 1244 may be omitted, and the elastic element 1242 may be fixed to the connecting arm 1243 by pasting or snapping.

[0054] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of this application, the connecting arm 1243 includes a first part 125 and a second part 126. The first part 125 includes a first end 1251 and a second end 1252. The first end 1251 is connected to the cover 120. The cross-sectional area of ​​the first part 125 gradually decreases from the first end 1251 to the second end 1252. The second end 1252 is connected to the second part 126. The second part 126 is connected to the support structure 1244.

[0055] In other words, along the direction away from the cover 120, the connecting arm 1243 has a gradually tapering wedge-shaped structure; the cross-section of the first part 125 is rectangular, and the cross-sectional area of ​​the first part 125 refers to the cross-sectional area of ​​the first part 125 along the plane perpendicular to the direction Z, that is, the cross-sectional area on the XY plane.

[0056] With this configuration, the first part 125 is used to improve the overall strength, so that the first end 1251 has good structural strength and is firmly connected to the cover 120. The second end 1252 has good elasticity, which can drive the second part 126, the support structure 1244 and the elastic element 1242 to elastically abut against the inner wall of the box 110.

[0057] In other embodiments, the first portion 125 may also be a structure with a uniform cross-section, and the cross-section of the first portion 125 may be circular or elliptical, etc.

[0058] like Figure 3 and Figure 4 As shown, in some embodiments of this application, the second part 126 includes a first side 1261 and a second side 1262. The first side 1261 is connected to the support structure 1244, and the second side 1262 forms a plurality of groove structures 1263.

[0059] Along the Y direction, the two opposite sides of the second part 126 are the first side 1261 and the second side 1262, respectively. The inner wall of the side wall 112 of the first side 1261 facing the housing 110 is connected to the support structure 1244, and the second side 1262 faces the interior of the housing 110. The support structure 1244 can be integrally formed with the second part 126, or it can be detachably assembled by means of gluing, snap-fitting, threaded connection, etc. Multiple groove structures 1263 are arranged at intervals along the Z direction, and each groove structure 1263 extends to the edge of the second part 126 along the X direction. The multiple groove structures 1263 can also be arranged in a square array in the Z and X directions.

[0060] This configuration increases the elasticity of the second part 126. When subjected to external force, the grooved structure is more likely to deform. When the support structure 1244 abuts against the inner wall of the box 110 through the elastic element 1242, it is less likely to break. Elastic deformation can be absorbed through elastic deformation.

[0061] like Figure 4 As shown, in some embodiments of this application, multiple first portions 125 are provided, and multiple first portions 125 are arranged side by side, and multiple first portions 125 are connected together between the cover 120 and the second portion 126.

[0062] Multiple first parts 125 are arranged side by side along direction X, with a gap between two adjacent first parts 125.

[0063] This design not only reduces the weight of the connecting arm 1243, but also increases its elasticity, making it less prone to breakage when the elastic element 1242 abuts against the inner wall of the housing 110.

[0064] In other embodiments, only one first part 125 may be provided.

[0065] like Figure 7 As shown, in some embodiments of this application, the third engaging portion 124 is provided with a guide surface 1245. The guide surface 1245 is inclined. During the process of the cover 120 covering the box 110, the guide surface 1245 is configured to slide and engage with the inner surface of the box 110 in the direction Z to guide the first engaging portion 123 and the second engaging portion 111 to snap together.

[0066] The inner wall of the side wall 112 is the first surface 1121, and the guide surface 1245 is disposed on the side of the third engaging part 124 facing the first surface 1121. The guide surface 1245 can replace the elastic member 1242 and abut against the first surface 1121 after the first engaging part 123 and the second engaging part 111 are connected by sliding. The guide surface 1245 can also be formed on the engaging member 1241 of the third engaging part 124 and is disposed independently from the elastic member 1242.

[0067] As an example, such as Figure 7 As shown, the guide surface 1245 is arranged parallel to the first surface 1121. After the guide surface 1245 slides to guide the first engaging part 123 and the second engaging part 111 to snap together, they abut against the first surface 1121. As another example, such as Figure 8As shown, the guide surface 1245 is inclined relative to the first surface 1121. In the direction from the housing 110 to the cover 120, the guide surface 1245 extends inclined towards the first surface 1121. The third engaging part 124 is deformed, and the force between the guide surface 1245 and the first surface 1121 increases, which more reliably ensures the assembly of the cover 120 and the housing 110.

[0068] Some embodiments of the present application include a power distribution box, which includes a power distribution box housing 100 and electrical components, the electrical components being enclosed inside the power distribution box housing 100.

[0069] Due to the characteristics of the distribution box housing 100 in this embodiment, it can reliably protect electrical components, thereby providing good safety performance.

[0070] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power distribution box housing, characterized by, The device includes a housing (110) and a cover (120). The cover (120) covers the opening of the housing (110) along the Z direction. The cover (120) has a first engaging portion (123) on both sides in the Y direction. The housing (110) has a second engaging portion (111) on the outer walls of both sides in the Y direction, corresponding to the first engaging portion (123). The first engaging portion (123) and the second engaging portion (111) are engaged to achieve a fixed connection between the cover (120) and the housing (110) along the Z direction. The Z direction is the height direction of the housing (110), and the Y direction is the width direction of the housing (110). The cover (120) is also provided with a plurality of third engaging parts (124), which extend into the box (110) and abut against the inner wall of the box (110) along the direction Y.

2. The power distribution box housing of claim 1, wherein, The third engaging part (124) includes an engaging member (1241) and an elastic member (1242). One end of the engaging member (1241) is connected to the cover (120), and the other end extends toward the inner wall of the box (110) along the direction Y. The elastic member (1242) is disposed between the engaging member (1241) and the inner wall of the box (110). The elastic member (1242) is configured to increase the frictional force when the cover (120) and the box (110) move relative to each other.

3. The power distribution box housing of claim 2, wherein, The engaging component (1241) includes a connecting arm (1243) and a supporting structure (1244). The connecting arm (1243) is connected to the cover (120) along the direction Z. The supporting structure (1244) protrudes from the side of the connecting arm (1243) near the box (110) along the direction Y. The elastic element (1242) is sleeved on the surface of the supporting structure (1244) and is bonded to the supporting structure (1244).

4. The power distribution box housing of claim 3, wherein, The connecting arm (1243) includes a first part (125) and a second part (126). The first part (125) includes a first end (1251) and a second end (1252). The first end (1251) is connected to the cover (120). The cross-sectional area of ​​the first part (125) gradually decreases from the first end (1251) to the second end (1252). The second end (1252) is connected to the second part (126). The second part (126) is connected to the support structure (1244).

5. The power distribution box housing of claim 4, wherein, The second part (126) includes a first side (1261) and a second side (1262), the first side (1261) being connected to the support structure (1244), and the second side (1262) forming a plurality of groove structures (1263).

6. The power distribution box housing of claim 1, wherein, The first engaging portion (123) includes a slot structure (1231), and the second engaging portion (111) includes a slide groove (1111) and a protrusion structure (1112). The protrusion structure (1112) is disposed in the slide groove (1111). The slide groove (1111) is configured to allow the first engaging portion (123) to slide into it along the direction Z. The protrusion structure (1112) is configured to engage with the slot structure (1231).

7. The distribution box housing according to claim 1, characterized in that, The third engaging part (124) is provided with a guide surface (1245), which is inclined. During the process of the cover (120) covering the box (110), the guide surface (1245) is configured to slide and engage with the inner surface of the box (110) in the direction Z to guide the first engaging part (123) and the second engaging part (111) to snap together.

8. The power distribution box housing of claim 1, wherein, Two third engaging portions (124) are provided. The third engaging portions (124) are provided on the side of the cover (120) facing the box (110). Along the edge of the cover (120), the two third engaging portions (124) are symmetrically arranged on both sides of the first engaging portion (123).

9. The power distribution box housing of claim 1, wherein, The cover (120) includes a body (121) and an edge portion (122). The edge portion (122) extends from the edge of the body (121) toward the box (110) along the direction Z. The first engaging portion (123) and the third engaging portion (124) are both connected to the edge portion (122).

10. A distribution box characterized in that, include: The distribution box housing (100) as described in any one of claims 1 to 9; Electrical components are enclosed inside the distribution box housing (100).

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