Battery box

Abstract

The utility model discloses a battery box which comprises an upper shell and a lower shell, the interior of the lower shell is hollow, and one surface, facing the upper shell, of the lower shell is opened to form a lower accommodating groove; the interior of the upper shell is hollow, and one surface facing the lower shell is opened to form an accommodating upper groove; when the upper shell is fixedly connected with the lower shell, the accommodating lower groove and the accommodating upper groove are combined to form a module accommodating space for accommodating the battery module; the battery module comprises a power interface, and the accommodating lower groove is fixedly provided with a lower groove limiting structure for limiting the movement and rotation of the power interface; the power interface comprises a power interface body, the power interface body is fixedly connected with an interface limiting part used for being matched with the lower groove limiting structure, and at least one face of the interface limiting part makes contact with the lower groove limiting structure. According to the battery box, the movement and rotation of the power interface can be limited through the matching of the lower groove limiting structure and the interface limiting part, so that a power line connected between the power interface and the battery pack is prevented from being damaged due to the movement or rotation of the power interface, and the reliability of the battery box is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery box. Background Art

[0002] Battery packs are usually used as external power sources for electrical appliances such as robots and toys. With the continuous development of the electrical industry, the requirements for the use of batteries by electrical appliances are getting higher and higher, and the batteries should be safe, reliable and beautiful.

[0003] Most of the existing battery packs on the market are simply encapsulated by heat-shrinkable films for multiple batteries. For example, a Chinese patent with the application number 201520912285.6 and the name of a strip battery pack discloses that the strip battery pack includes: multiple single-cell batteries, a facing pad and a solder joint arranged between every two single-cell batteries, and an overall heat-shrinkable film covering the side surfaces of the multiple single-cell batteries. This kind of battery pack packaged by heat-shrinkable film has poor anti-drop performance and certain potential safety hazards.

[0004] To protect the safety of the battery, it is considered to put the battery pack into a housing for protection. For example, a Chinese patent with the application number 2021222207786.2 and the name of a battery waterproof housing discloses that the battery waterproof housing includes an upper shell and a lower shell. An accommodation cavity for accommodating the battery body is formed between the upper shell and the lower shell. The upper shell is provided with an ultrasonic structure, and the lower shell is provided with an ultrasonic groove. This patent only discloses how the upper shell and the lower shell are fixed, and does not disclose the detailed structure in the housing. Summary of the Utility Model

[0005] When the battery pack is enclosed in the housing, it is necessary to consider whether the joints of the battery pack are enclosed in the housing at the same time. If the joints are placed outside the housing, they will not be protected by the housing. If the joints are directly installed in the housing, they may move and rotate in the housing, which is likely to damage the connecting wires between the battery pack and the joints. The purpose of the present utility model is to provide a battery box, which solves the problem that the joints are prone to displacement and rotation when the battery pack is enclosed in the housing by setting a lower groove limiting structure for the limiting power supply structure.

[0006] To achieve this purpose, the present utility model adopts the following technical solutions:

[0007] A battery box includes an upper shell and a lower shell. The inside of the lower shell is hollow and open towards the side facing the upper shell, forming a lower accommodation groove; the inside of the upper shell is hollow and open towards the side facing the lower shell, forming an upper accommodation groove; when the upper shell is fixedly connected to the lower shell, the lower accommodation groove and the upper accommodation groove are combined to form a module accommodation space for accommodating the battery module;

[0008] The battery module includes a power interface, and a lower slot limiting structure for restricting the movement and rotation of the power interface is fixedly provided on the lower accommodating slot; the power interface includes a power interface, and an interface restricted part for cooperating with the lower slot limiting structure is fixedly connected to the power interface, and at least one surface of the interface restricted part contacts the lower slot limiting structure.

[0009] Optionally, an upper slot pressing member for pressing the power interface is fixedly provided on the upper accommodating slot, an interface pressed part for cooperating with the upper slot pressing member is fixedly connected to the power interface, and the upper slot pressing member abuts against the interface pressed part.

[0010] Optionally, the lower slot limiting structure includes a first lower slot limiting piece for restricting the left - right movement and rotation of the power interface, and the interface restricted part includes an interface restricted block for cooperating with the first lower slot limiting piece;

[0011] A restricted block accommodating space for embedding the interface restricted block is formed between the first lower slot limiting piece and the slot wall of the lower accommodating slot, and the interface restricted block is embedded in the restricted block accommodating space; one of the opposite surfaces of the interface restricted block contacts the slot wall of the lower accommodating slot, and the other surface contacts the first lower slot limiting piece.

[0012] Optionally, the power interface includes an interface head section, an interface middle section, and an interface tail section that are fixedly connected in sequence. The interface restricted block is fixedly connected to the interface head section. The interface restricted block is a cuboid, and the interface head section, the interface middle section, and the interface tail section are all cylindrical. The power interface is integrally formed.

[0013] Optionally, the lower slot limiting structure includes a second lower slot limiting piece for restricting the front - back movement of the power interface, and the interface restricted part includes an interface restricted ring for cooperating with the second lower slot limiting piece;

[0014] The outer diameters of the interface middle section and the interface restricted ring are both larger than the outer diameter of the interface tail section. The interface restricted ring is fixedly sleeved on the interface tail section and is spaced from the interface middle section by a preset distance; a second limiting piece groove is formed on the surface of the second lower slot limiting piece facing the upper accommodating slot, and the interface tail section located between the interface restricted ring and the interface middle section is embedded in the second limiting piece groove; one of the opposite surfaces of the second lower slot limiting piece contacts the interface middle section, and the other surface contacts the interface restricted ring;

[0015] The interface restricted ring and the power interface are integrally formed;

[0016] An interface limiting block through hole is provided on the interface limiting block, and an end of the interface head section away from the interface middle section is inserted into the interface limiting block through hole, and the interface head section does not extend out of the interface limiting block and is not flush with the outer surface of the interface limiting block; the interface limiting block and the power interface are integrally formed, and an interface female head is provided at one end of the interface head section away from the interface middle section for plugging into other male heads.

[0017] Optionally, the interface pressure-bearing portion is provided with uneven textures, and the interface pressure-bearing portion is fixedly connected to the interface head section;

[0018] The upper groove pressure member includes at least one upper groove pressure column; one end of the upper groove pressure column is fixedly connected to the groove bottom of the upper groove, and the other end abuts against the interface pressure portion;

[0019] The upper groove pressure column is a hollow column, the interface pressure portion and the power interface are integrally formed, and the upper groove pressure column and the upper shell are integrally formed.

[0020] Optionally, a plurality of curved grooves are provided on the middle section of the interface, each of the curved grooves is provided around the middle section of the interface and does not fully circle, and the positions of two adjacent curved grooves that are not fully circled are staggered with each other; and the plurality of curved grooves are evenly spaced along the radial direction of the middle section of the interface.

[0021] Optionally, the accommodating lower groove is a rectangular groove, comprising a first lower groove wall, a second lower groove wall, a third lower groove wall and a fourth lower groove wall which are fixedly connected end to end in sequence;

[0022] A groove for inserting a line is provided on the side of the lower shell that contacts the upper shell, and a groove for inserting a line is provided on the side of the upper shell that contacts the lower shell, and the groove for inserting a line and the groove for inserting a line are combined to form a through hole for inserting a line that communicates with the module accommodating space; the groove for inserting a line is provided on the first lower groove wall, and the interface limiting block is closely attached to the groove for inserting a line; the groove for inserting a line and the groove for inserting a line are both semicircular grooves, and the through hole for inserting a line is a round hole;

[0023] The first limit piece of the lower groove is parallel to the second lower groove wall; the first limit piece of the lower groove is fixedly connected to the groove bottom of the accommodating lower groove, and one side is fixedly connected to the first lower groove wall;

[0024] The second limiting piece of the lower groove is parallel to the first lower groove wall; the first limiting piece of the lower groove is fixedly connected to the groove bottom of the accommodating lower groove, and one side is fixedly connected to the second lower groove wall; the groove of the second limiting piece includes a rectangular upper groove part and a semicircular lower groove part in sequence from the groove mouth to the groove bottom, and the tail section of the interface enters the semicircular lower groove part from the rectangular upper groove part of the groove of the second limiting piece;

[0025] An interface head segment support piece is also fixedly arranged in the lower accommodating groove. A support groove is formed on the surface of the interface head segment support piece facing the upper accommodating groove, and a part of the interface head segment is embedded in the support groove; the interface head segment support piece is parallel to the first lower groove wall; the interface head segment support piece is fixedly connected to the bottom of the lower accommodating groove and fixedly connected to the second lower groove wall on one side;

[0026] A reinforcing piece is also fixedly arranged in the lower accommodating groove. The reinforcing piece is parallel to the second lower groove wall; the reinforcing piece is fixedly connected to the bottom of the lower accommodating groove, fixedly connected to the interface head segment support piece on one side and fixedly connected to the second lower groove limiting piece on the other side;

[0027] At least one interface restricted block support piece is also fixedly arranged in the lower accommodating groove. The interface restricted block support piece is fixedly connected to the bottom of the lower accommodating groove, and one surface of the interface restricted block facing the bottom of the lower accommodating groove abuts against the interface restricted block support piece; the interface restricted block support piece is parallel to the second lower groove wall, and one side of the interface restricted block support piece is fixedly connected to the first lower groove wall.

[0028] Optionally, the battery module includes at least one battery. A battery limiting elastic member is fixedly connected to the surface of the battery facing the upper accommodating groove, and the surface of the battery limiting elastic member away from the battery abuts against the bottom of the upper accommodating groove; the battery limiting elastic member is a fireproof sponge glue;

[0029] The battery module includes a circuit protection board. The battery is fixedly connected to the circuit protection board; a power line is fixedly connected to the circuit protection board, and one end of the power line away from the circuit protection board is fixedly connected to the power interface.

[0030] Optionally, a welding slot is formed on the surface of the upper shell contacting the lower shell and is arranged around the notch of the upper accommodating groove, and a welding convex edge is fixedly arranged on the surface of the lower shell contacting the upper shell and is arranged around the notch of the lower accommodating groove; or, a welding convex edge is fixedly arranged on the surface of the upper shell contacting the lower shell and is arranged around the notch of the upper accommodating groove, and a welding slot is formed on the surface of the lower shell contacting the upper shell and is arranged around the notch of the lower accommodating groove;

[0031] The welding convex edge is inserted into the welding slot, and an ultrasonic welding seam is formed between the welding convex edge and the welding slot;

[0032] The welding convex edge includes a rectangular convex bottom and a triangular convex tip which are fixedly connected. The tip of the triangular convex tip points to the bottom of the welding slot. The thick end of the triangular convex tip is fixedly connected to the rectangular convex bottom, and one end of the rectangular convex bottom away from the triangular convex tip is fixedly connected to the upper shell or the lower shell;

[0033] On one side of the upper shell in contact with the lower shell, away from the outer edge of the upper accommodating groove, an art upper notch with two open sides is provided. On one side of the lower shell in contact with the upper shell, away from the outer edge of the lower accommodating groove, an art lower notch with two open sides is provided. The art upper notch and the art lower notch combine to form an art groove.

[0034] Optionally, an interface limiting block through-hole is provided on the interface limiting block. An annular limiting portion is fixedly provided in the interface limiting block through-hole. One end of the interface head section away from the interface middle section is inserted into the interface limiting block through-hole and contacts the annular limiting portion.

[0035] The lower groove limiting structure includes a second limiting piece for the lower groove to limit the movement of the power interface. The outer diameter of the interface middle section is larger than the outer diameter of the interface tail section. A second limiting piece groove is provided on the side of the second limiting piece in the lower groove facing the upper accommodating groove. One end of the interface tail section connecting the interface middle section is embedded in the second limiting piece groove, and the side of the interface middle section contacting the second limiting piece in the lower groove.

[0036] The interface head section and the interface limiting block through-hole are in interference connection.

[0037] Compared with the prior art, the present utility model has the following beneficial effects:

[0038] The battery box provided by the present utility model can limit the movement and rotation of the power interface through the cooperation of the lower groove limiting structure and the interface limiting portion, thereby avoiding damage to the power cord connected between the power interface and the battery pack due to the movement or rotation of the power interface, and improving the reliability of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0040] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model.

[0041] Figure 1Schematic diagram of the battery box provided in the first embodiment of the present utility model;

[0042] Figure 2 Partial schematic diagram of the battery box provided in the first embodiment of the present utility model;

[0043] Figure 3 Another partial schematic diagram of the battery box provided in the first embodiment of the present utility model;

[0044] Figure 4 Schematic diagram of the lower case of the battery box provided in the first embodiment of the present utility model;

[0045] Figure 5 Partial schematic diagram of the power interface of the battery box provided in the first embodiment of the present utility model;

[0046] Figure 6 Schematic diagram of the upper case of the battery box provided in the first embodiment of the present utility model;

[0047] Figure 7 Another partial schematic diagram of the battery box provided in the first embodiment of the present utility model;

[0048] Figure 8 Another schematic diagram of the upper case of the battery box provided in the first embodiment of the present utility model;

[0049] Figure 9 For Figure 8 Enlarged schematic diagram of area A in;

[0050] Figure 10 Another partial schematic diagram of the battery box provided in the first embodiment of the present utility model;

[0051] Figure 11 For Figure 10 Enlarged schematic diagram of area B in;

[0052] Figure 12 Partial schematic diagram of the battery box provided in the second embodiment of the present utility model;

[0053] Figure 13 Schematic diagram of the interface limiting block provided in the second embodiment of the present utility model.

[0054] In the figure: 1. Upper shell; 11. Plug wire upper groove; 12. Art upper notch; 2. Lower shell; 201. First lower groove wall; 202. Second lower groove wall; 203. Third lower groove wall; 204. Fourth lower groove wall; 21. Plug wire lower groove; 22. Art lower notch; 3. Power interface; 31. Interface head section; 311. Interface female head; 32. Interface middle section; 321. Bending groove; 33. Interface tail section; 4. Lower groove limiting structure; 41. First lower groove limiting piece; 42. Second lower groove limiting piece; 421. Second limiting piece groove; 5. Interface restricted part; 51. Interface restricted block; 511. Interface restricted block through hole; 512. Annular limiting part; 52. Interface restricted ring; 61. Upper groove pressing part; 62. Interface pressed part; 71. Interface head section supporting piece; 711. Supporting groove; 72. Reinforcing piece; 73. Interface restricted block supporting piece; 81. Battery; 82. Battery limiting elastic part; 83. Circuit protection board; 84. Power cord; 91. Welding convex edge; 911. Rectangular convex bottom; 912. Triangular convex tip; 92. Welding slot. Detailed implementation mode

[0055] In order to make the utility model purpose, features, and advantages more obvious and understandable, the following will combine the drawings in the embodiments of the present utility model to clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model.

[0056] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. It should be noted that when a component is considered to be "connected / set on" another component, it may be connected / set on another component, and there may also be a component disposed in the middle at the same time.

[0057] The following will further illustrate the technical solutions of the present utility model in conjunction with the drawings and through specific implementation modes.

[0058] Embodiment 1

[0059] Please refer to Figure 1 、 Figure 2 and Figure 7, an embodiment of the present utility model provides a battery box, which includes an upper shell 1 and a lower shell 2. The interior of the lower shell 2 is hollow and open towards the upper shell 1, forming a lower accommodating groove. The interior of the upper shell 1 is hollow and open towards the lower shell 2, forming an upper accommodating groove. When the upper shell 1 is fixedly connected to the lower shell 2, the lower accommodating groove and the upper accommodating groove are combined to form a module accommodating space for accommodating a battery module.

[0060] The battery module includes a power interface 3, and a lower groove limiting structure 4 for restricting the movement and rotation of the power interface 3 is fixedly provided in the lower accommodating groove. The power interface 3 is fixedly connected with an interface restricted part 5 for cooperating with the lower groove limiting structure 4, and at least one side of the interface restricted part 5 contacts the lower groove limiting structure 4.

[0061] Through the cooperation of the lower groove limiting structure 4 and the interface restricted part 5, the battery box can restrict the movement and rotation of the power interface 3 in the module accommodating space, thereby avoiding damage to the power cord 84 connected between the power interface 3 and the battery 81 due to the movement or rotation of the power interface 3, and further improving the reliability of the battery box.

[0062] Please refer to Figures 3 - 5 , the lower groove limiting structure 4 includes a lower groove first limiting piece 41 for restricting the left - right movement and rotation of the power interface 3, and the interface restricted part 5 includes an interface restricted block 51 for cooperating with the lower groove first limiting piece 41.

[0063] A restricted block accommodating space for embedding the interface restricted block 51 is formed between the lower groove first limiting piece 41 and the groove wall of the lower accommodating groove, and the interface restricted block 51 is embedded in the restricted block accommodating space. One of the opposite two sides of the interface restricted block 51 contacts the groove wall of the lower accommodating groove, and the other side contacts the lower groove first limiting piece 41.

[0064] The power interface 3 includes an interface head section 31, an interface middle section 32, and an interface tail section 33 that are fixedly connected in sequence. The interface restricted block 51 is fixedly connected to the interface head section 31. The interface restricted block 51 is a cuboid, and the interface head section 31, the interface middle section 32, and the interface tail section 33 are all cylindrical. The power interface 3 is integrally formed.

[0065] The interface restricted block 51 is located between the groove wall of the lower accommodating groove and the lower groove first limiting piece 41. If the power interface 3 moves to the left, the interface restricted block 51 is restricted by the groove wall of the lower accommodating groove; if the power interface 3 moves to the right, the interface restricted block 51 is restricted by the lower groove first limiting piece 41. And because the interface restricted block 51 is a cuboid, the rotation of the interface restricted block 51 is also restricted. In summary, the power interface 3 cannot move or rotate left and right.

[0066] In this embodiment, an interface limiting block through hole 511 is formed on the interface limiting block 51. One end of the interface head section 31 away from the interface middle section 32 is inserted into the interface limiting block through hole 511. The interface head section 31 does not protrude from the interface limiting block 51 and is not flush with the outer surface of the interface limiting block 51. The interface limiting block 51 and the power interface 3 are integrally formed. An interface female head 311 for plugging with a male head interface outside the battery box is provided on the interface head section 31. The interface female head 311 is located in the interface limiting block through hole 511. Then, the male head interface needs to be inserted into the interface limiting block 51 for a certain distance before it can be plugged with the interface female head 311. In this way, when the male head interface outside the battery box is connected to the power interface 3 in the battery box, it can be inserted deeper into the battery box, making the connection more beautiful. It can also protect the connected parts of the male head interface and the power interface 3 to reduce the risk of damage.

[0067] In this embodiment, the lower groove limiting structure 4 includes a lower groove second limiting piece 42 for restricting the front-back movement of the power interface 3, and the interface limiting part 5 includes an interface limiting ring 52 for cooperating with the lower groove second limiting piece 42.

[0068] The outer diameter of the interface middle section 32 and the outer diameter of the interface limiting ring 52 are both larger than the outer diameter of the interface tail section 33. The interface limiting ring 52 is fixedly sleeved on the interface tail section 33 and is spaced from the interface middle section 32 by a preset distance. A second limiting piece groove 421 is formed on the surface of the lower groove second limiting piece 42 facing the accommodating upper groove. The interface tail section 33 located between the interface limiting ring 52 and the interface middle section 32 is embedded in the second limiting piece groove 421. One of the opposite two surfaces of the lower groove second limiting piece 42 contacts the interface middle section 32, and the other surface contacts the interface limiting ring 52. The interface limiting ring 52 and the power interface 3 are integrally formed.

[0069] The lower groove second limiting piece 42 is located between the interface middle section 32 and the interface limiting ring 52. If the power interface 3 moves forward, the interface limiting ring 52 is restricted by the lower groove second limiting piece 42; if the power interface 3 moves backward, the interface middle section 32 is restricted by the lower groove second limiting piece 42. In summary, the power interface 3 cannot move back and forth.

[0070] In this embodiment, a plurality of bending grooves 321 are formed on the interface middle section 32. Each bending groove 321 is formed around the interface middle section 32 and does not wind around a full circle. The positions where the adjacent two bending grooves 321 do not wind around are staggered from each other. The plurality of bending grooves 321 are equally spaced along the radial direction of the interface middle section 32. The staggered bending grooves 321 can reduce the bending stress at the connection points when bending or folding the wire in a specific scenario.

[0071] Please refer to Figure 3 and Figure 6The upper slot is fixedly provided with an upper slot pressure piece 61 for pressing the power interface 3, and the power interface 3 is fixedly connected with an interface pressure portion 62 for cooperating with the upper slot pressure piece 61, and the upper slot pressure piece 61 abuts against the interface pressure portion 62. The cooperation between the upper slot pressure piece 61 and the interface pressure portion 62 can further press the power interface 3 to prevent the power interface 3 from displacement and rotation.

[0072] Specifically, the interface pressure part 62 is fixedly connected to the interface head section 31, and an uneven texture is provided on the interface pressure part 62. The uneven texture can increase the friction force, so that the upper groove pressure member 61 can press the interface pressure part 62 more stably and not easily slip.

[0073] The upper groove pressure member 61 includes at least one upper groove pressure column, one end of which is fixedly connected to the groove bottom of the upper groove, and the other end of which abuts against the interface pressure receiving portion 62 .

[0074] The interface pressure receiving portion 62 and the power interface 3 are integrally formed, and the upper groove pressure column and the upper shell 1 are integrally formed. The upper groove pressure column is a hollow column, and the setting of the hollow column can reduce the pressure area and avoid pressure dispersion when applying pressure, that is, the power interface 3 can be pressed tighter to prevent it from moving.

[0075] Please refer to Figure 4 and Figure 6 The accommodating lower groove is a rectangular groove, including a first lower groove wall 201, a second lower groove wall 202, a third lower groove wall 203 and a fourth lower groove wall 204 which are fixedly connected end to end in sequence.

[0076] A groove 21 for inserting a line is provided on the side of the lower shell 2 that contacts the upper shell 1, and a groove 11 for inserting a line is provided on the side of the upper shell 1 that contacts the lower shell 2. The groove 21 for inserting a line and the groove 11 for inserting a line are combined to form a through hole for inserting a line that connects the module accommodation space. The groove 21 for inserting a line is provided on the first lower groove wall 201, and the interface limiting block 51 is arranged close to the groove 21 for inserting a line, that is, the interface limiting block 51 contacts the first lower groove wall 201, and the through hole 511 of the interface limiting block is aligned with the through hole for inserting a line. The male interface passes through the through hole for inserting a line and the through hole 511 of the interface limiting block in turn, and is plugged into the female interface 311. The groove 21 for inserting a line and the groove 11 for inserting a line are both semicircular grooves, and the through hole for inserting a line is a round hole.

[0077] The first limit piece 41 of the lower groove is parallel to the second lower groove wall 202. The first limit piece 41 of the lower groove is fixedly connected to the groove bottom accommodating the lower groove, and one side is fixedly connected to the first lower groove wall 201.

[0078] The second limiting piece 42 of the lower slot is parallel to the first lower slot wall 201. The first limiting piece 41 of the lower slot is fixedly connected to the bottom of the lower slot for accommodation, and is fixedly connected to the second lower slot wall 202 on one side. The groove 421 of the second limiting piece successively includes a rectangular upper slot part and a semicircular lower slot part from the slot opening to the slot bottom, and the tail section 33 of the interface enters the semicircular lower slot part from the rectangular upper slot part of the groove 421 of the second limiting piece. By providing the rectangular upper slot part and the semicircular lower slot part, the lower half of the tail section 33 of the interface facing the bottom of the lower slot for accommodation can be adapted to the shape of the semicircular lower slot part, and at the same time, the upper half of the tail section 33 of the interface facing the upper slot for accommodation can also enter the rectangular upper slot part. In this way, it can be avoided that the upper half of the tail section 33 of the interface facing the upper slot for accommodation is exposed outside the groove 421 of the second limiting piece, making the limiting effect of the second limiting piece 42 of the lower slot better.

[0079] An interface head section support piece 71 is also fixedly provided in the lower slot for accommodation. A support groove 711 is formed on the surface of the interface head section support piece 71 facing the upper slot for accommodation, and a part of the interface head section 31 is embedded in the support groove 711. The interface head section support piece 71 is parallel to the first lower slot wall 201. The interface head section support piece 71 is fixedly connected to the bottom of the lower slot for accommodation, and is fixedly connected to the second lower slot wall 202 on one side. The interface head section support piece 71 supports the interface head section 31 and forms a cooperation with the upper slot pressing piece 61. When the upper slot pressing piece 61 applies a downward pressure to the interface head section 31, the interface head section support piece 71 gives an upward supporting force to the interface head section 31. In this way, the interface head section 31 is limited up and down and is difficult to move in the up and down direction. At the same time, since the power interface 3 is pressed tightly, it also has a limiting effect on its displacement and rotation in the horizontal direction.

[0080] A reinforcing piece 72 is also fixedly provided in the lower slot for accommodation. The reinforcing piece 72 is parallel to the second lower slot wall 202. The reinforcing piece 72 is fixedly connected to the bottom of the lower slot for accommodation. One side of the reinforcing piece 72 is fixedly connected to the interface head section support piece 71 and the other side is fixedly connected to the second limiting piece 42 of the lower slot. The presence of the reinforcing piece 72 strengthens the structural strength of the interface head section support piece 71 and the second limiting piece 42 of the lower slot.

[0081] At least one interface restricted block support piece 73 is also fixedly provided in the lower slot for accommodation. The interface restricted block support piece 73 is fixedly connected to the bottom of the lower slot for accommodation. The surface of the interface restricted block 51 facing the bottom of the lower slot for accommodation abuts against the interface restricted block support piece 73. The interface restricted block support piece 73 is parallel to the second lower slot wall 202, and one side of the interface restricted block support piece 73 is fixedly connected to the first lower slot wall 201. The interface restricted block support piece 73 can support the interface restricted block 51. The aforementioned interface head section support piece 71 and the second limiting piece 42 of the lower slot also support the relevant parts of the power interface 3 respectively, so that the power interface 3 can be aligned with the plugging through hole, and further the male interface outside the battery box can be plugged into the female head 311 of the interface restricted block through hole 511.

[0082] The left - right movement, front - back movement, and up - down movement described in this embodiment are relative concepts. In this embodiment, the direction in which the power interface 3 extends according to the interface head section 31, interface middle section 32, and interface tail section 33 is defined as the front - back direction. The direction perpendicular to the front - back direction and on the same horizontal plane is the left - right direction, and the direction perpendicular to the front - back direction and not on the same horizontal plane is the up - down direction. That is, when the power interface 3 moves towards the bottom of the upper accommodation slot, it is moving upwards; when it moves towards the bottom of the lower accommodation slot, it is moving downwards; when it moves towards the first lower slot wall 201, it is moving forwards; when it moves towards the third lower slot wall 203, it is moving backwards; when it moves towards the second lower slot wall 202, it is moving left; and when it moves towards the fourth lower slot wall 204, it is moving right.

[0083] Please refer to Figure 7 , the battery module includes at least one battery 81. A battery limiting elastic member 82 is fixedly connected to the side of the battery 81 facing the upper accommodation slot, and the side of the battery limiting elastic member 82 away from the battery 81 abuts against the bottom of the upper accommodation slot. The battery limiting elastic member 82 is a fire - resistant sponge glue. The battery module includes a circuit protection board 83, and the battery 81 is fixedly connected to the circuit protection board 83. The circuit protection board 83 is fixedly connected with a power cord 84, and one end of the power cord 84 away from the circuit protection board 83 is fixedly connected to the interface tail section 33.

[0084] Due to the characteristics of compression and rebound of the fire - resistant sponge glue, when the upper shell 1 is fixedly connected to the lower shell 2, the fire - resistant sponge glue can press the battery 81 tightly to prevent the battery 81 from shifting in the module accommodation space. And the fire - resistant sponge glue can also play a protective role in case of battery 81 catching fire, enhancing the safety performance of the battery 81.

[0085] Please refer to Figures 8 - 11 , on the surface of the upper shell 1 in contact with the lower shell 2, a welding flange 91 is fixedly provided around the slot opening of the upper accommodation slot. On the surface of the lower shell 2 in contact with the upper shell 1, a welding slot 92 is formed around the slot opening of the lower accommodation slot. It can be understood that if a welding slot 92 is formed on the surface of the upper shell 1 in contact with the lower shell 2 around the slot opening of the upper accommodation slot, and a welding flange 91 is fixedly provided on the surface of the lower shell 2 in contact with the upper shell 1 around the slot opening of the lower accommodation slot, such a form can also enable the upper shell 1 and the lower shell 2 to be welded.

[0086] The welding flange 91 is inserted into the welding slot 92, and an ultrasonic welding seam is formed between the welding flange 91 and the welding slot 92. The welding flange 91 includes a rectangular convex bottom 911 and a triangular convex tip 912 which are fixedly connected. The tip of the triangular convex tip 912 points to the bottom of the welding slot 92. The thick end of the triangular convex tip 912 is fixedly connected to the rectangular convex bottom 911, and the end of the rectangular convex bottom 911 away from the triangular convex tip 912 is fixedly connected to the upper shell 1 or the lower shell 2. The welding flange 91 and the upper shell 1 / lower shell 2 are integrally formed.

[0087] On one side where the upper shell 1 contacts the lower shell 2 and away from the outer edge of the upper accommodating groove, a two-sided open art upper notch 12 is provided. On one side where the lower shell 2 contacts the upper shell 1 and away from the outer edge of the lower accommodating groove, a two-sided open art lower notch 22 is provided. The art upper notch 12 and the art lower notch 22 combine to form an art groove. During the ultrasonic welding process, if the outer edge at the connection between the upper shell 1 and the lower shell 2 melts, the plastic melt flow will exist in the art groove and will not overflow, making the welded battery box more beautiful.

[0088] The installation process of the battery box in this embodiment is as follows: The power cord 84 of the power interface 3 is welded to the circuit protection board 83 and then installed into the lower accommodating groove. When installing the power interface 3, the interface limiting block 51 is placed into the limiting block accommodating space so that it contacts the interface limiting block supporting piece 73, the first lower groove wall 201, the second lower groove wall 202, and the first lower groove limiting piece 41. The interface tail section 33 located between the interface limiting ring 52 and the interface middle section 32 is placed into the second limiting piece groove 421. In this way, the movement of the power interface 3 in the front, back, left, and right directions is restricted. Then, the upper shell 1 and the lower shell 2 are butted. At this time, the upper groove pressing piece 61 can press the interface pressed part 62, and the bottom of the upper accommodating groove also presses the battery 81 tightly through the fireproof sponge glue, thereby limiting the movement of the power interface 3 and the battery 81. Next, the upper shell 1 and the lower shell 2 are ultrasonically welded and fixed using the triangular convex tip 912 as the ultrasonic welding line. During the ultrasonic welding process, the vibration energy is concentrated on the triangular convex tip 912, and then the accumulated heat will form a uniform plastic melt flow at the entire welding interface. After the plastic melt flow solidifies, the upper shell 1 and the lower shell 2 can be fixed together.

[0089] The battery box provided in this embodiment has the following advantages:

[0090] 1. Through the cooperation of the lower groove limiting structure 4 and the interface limiting part 5, the movement and rotation of the power interface 3 are limited, thereby avoiding damage to the power cord 84 connected between the power interface 3 and the battery pack due to the movement or rotation of the power interface 3;

[0091] 2. Through the cooperation of the upper groove pressing piece 61 and the interface pressed part 62, the power interface 3 is tightly pressed, further preventing the power interface 3 from shifting;

[0092] 3. A bending groove 321 is provided on the power interface 3 to reduce the bending stress when the power interface 3 is bent;

[0093] 4. Fireproof sponge glue is provided to tightly press the battery 81, preventing the battery 81 from shifting and providing fire protection;

[0094] 5. The upper shell 1 and the lower shell 2 are fixed by welding, and an art groove is provided to ensure beauty after welding.

[0095] Embodiment Two

[0096] In the battery box of this embodiment, the connection manner between the interface limiting block 51 and the power interface 3 is different from that in the first embodiment. In the first embodiment, the interface limiting block 51 and the power interface 3 are integrally formed, while in this embodiment, the interface limiting block 51 and the power interface 3 are detachably connected.

[0097] Please refer to Figures 12 - 13 , a ring-shaped limiting portion 512 is fixedly provided in the interface limiting block through hole 511, and one end of the interface head section 31 far from the interface middle section 32 is inserted into the interface limiting block through hole 511 and contacts the ring-shaped limiting portion 512. Specifically, the interface head section 31 and the interface limiting block through hole 511 are in interference connection.

[0098] In this embodiment, the interface limiting ring 52 is not provided on the interface tail section 33. One end of the interface tail section 33 connected to the interface middle section 32 is embedded in the second limiting piece groove 421 on the second lower groove limiting piece 42, and the surface of the interface middle section 32 in contact with the second lower groove limiting piece 42.

[0099] In summary, the presence of the ring-shaped limiting portion 512 limits the forward movement of the interface head section 31 in the interface limiting block through hole 511, and the interface limiting block 51 is restricted by the first lower groove wall 201 and cannot move forward, so the power interface 3 cannot move forward. The interface limiting block 51 is restricted by the second lower groove wall 202 and the first lower groove limiting piece 41 and cannot move left and right or rotate. Since the interface head section 31 and the interface limiting block through hole 511 are in interference connection, the power interface 3 cannot move left and right or rotate either. The interface tail section 33 is restricted by the second lower groove limiting piece 42 and cannot move backward, so the power interface 3 cannot move backward.

[0100] When installing the power interface 3 of this embodiment, insert the interface head section 31 into the interface limiting block through hole 511 until it contacts the ring-shaped limiting portion 512, then place the interface limiting block 51 into the limiting block accommodating space so that it contacts the interface limiting block support piece 73, the first lower groove wall 201, the second lower groove wall 202, and the first lower groove limiting piece 41, and place the interface tail section 33 into the second limiting piece groove 421 so that the second lower groove limiting piece 42 and the interface middle section 32 are in contact. In this way, the movement of the power interface 3 in the front, back, left, and right directions is restricted.

[0101] The advantages of the battery box provided in this embodiment are the same as those in the first embodiment and will not be elaborated here.

[0102] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery box, characterized in that, It comprises an upper shell and a lower shell, wherein the interior of the lower shell is hollow and opens toward one side of the upper shell to form a lower accommodating groove; the interior of the upper shell is hollow and opens toward one side of the lower shell to form an upper accommodating groove; When the upper shell is fixedly connected to the lower shell, the lower accommodating groove and the upper accommodating groove are combined to form a module accommodating space for accommodating a battery module; The battery module includes a power interface, and the lower accommodating slot is fixedly provided with a lower slot limiting structure for limiting the movement and rotation of the power interface; the power interface is fixedly connected with an interface limiting portion for cooperating with the lower slot limiting structure, and at least one side of the interface limiting portion contacts the lower slot limiting structure.

2. The battery box according to claim 1, wherein The accommodating upper groove is fixedly provided with an upper groove pressure piece for pressing the power interface, and the power interface is fixedly connected with an interface pressure portion for cooperating with the upper groove pressure piece, and the upper groove pressure piece abuts against the interface pressure portion.

3. The battery case according to claim 2, characterized in that, The lower slot limiting structure includes a lower slot first limiting piece for limiting the left-right movement and rotation of the power interface, and the interface limiting portion includes an interface limiting block for cooperating with the lower slot first limiting piece; A restricted block accommodating space for embedding the interface restricted block is formed between the first limiting piece of the lower groove and the groove wall of the accommodating lower groove, and the interface restricted block is embedded in the restricted block accommodating space; one of the two opposite surfaces of the interface restricted block contacts the groove wall of the accommodating lower groove, and the other surface contacts the first limiting piece of the lower groove; The power interface comprises an interface head section, an interface middle section and an interface tail section which are fixedly connected in sequence, the interface limiting block is fixedly connected to the interface head section, the interface limiting block is a rectangular parallelepiped, the interface head section, the interface middle section and the interface tail section are all cylindrical, and the power interface is integrally formed.

4. The battery case according to claim 3, characterized in that, The lower slot limiting structure includes a lower slot second limiting piece for limiting the forward and backward movement of the power interface, and the interface limiting portion includes an interface limiting ring for cooperating with the lower slot second limiting piece; The outer diameter of the middle section of the interface and the outer diameter of the interface limiting ring are both larger than the outer diameter of the rear section of the interface, the interface limiting ring is fixedly sleeved on the rear section of the interface and is spaced from the middle section of the interface by a preset distance; a second limiting plate groove is provided on a surface of the second limiting plate of the lower groove facing the accommodating upper groove, and the rear section of the interface located between the interface limiting ring and the middle section of the interface is embedded in the second limiting plate groove; one of the two opposite surfaces of the second limiting plate of the lower groove contacts the middle section of the interface, and the other surface contacts the interface limiting ring; The interface limiting ring and the power interface are integrally formed; An interface limiting block through hole is provided on the interface limiting block, and an end of the interface head section away from the interface middle section is inserted into the interface limiting block through hole, and the interface head section does not extend out of the interface limiting block and is not flush with the outer surface of the interface limiting block; the interface limiting block and the power interface are integrally formed, and an interface female head for plugging into a male head interface is provided at one end of the interface head section away from the interface middle section.

5. The battery case according to claim 3, wherein The interface pressure receiving portion is provided with uneven textures, and the interface pressure receiving portion is fixedly connected to the interface head section; The upper slot pressing member includes at least one upper slot pressing column; one end of the upper slot pressing column is fixedly connected to the bottom of the accommodating upper slot, and the other end abuts against the interface pressure-receiving portion; The upper slot pressing column is a hollow column, the interface pressure-receiving portion and the power interface are integrally formed, and the upper slot pressing column and the upper shell are integrally formed.

6. The battery case according to claim 3, characterized in that, A plurality of bending grooves are formed in the middle section of the interface. Each bending groove is formed around the middle section of the interface and does not wrap around a full circle. The positions where the adjacent two bending grooves do not wrap around are staggered from each other; the plurality of bending grooves are equally spaced along the radial direction of the middle section of the interface.

7. The battery case according to claim 4, wherein, The accommodating lower slot is a rectangular slot, including a first lower slot wall, a second lower slot wall, a third lower slot wall, and a fourth lower slot wall that are fixedly connected end to end in sequence; A wire insertion lower groove is formed on the surface of the lower shell in contact with the upper shell, and a wire insertion upper groove is formed on the surface of the upper shell in contact with the lower shell. The wire insertion lower groove and the wire insertion upper groove are combined to form a wire insertion through hole communicating with the module accommodating space; the wire insertion lower groove is formed on the first lower slot wall, and the interface limiting block is closely arranged against the wire insertion lower groove; both the wire insertion lower groove and the wire insertion upper groove are semi-circular grooves, and the wire insertion through hole is a circular hole; The first lower slot limiting piece is parallel to the second lower slot wall; the first lower slot limiting piece is fixedly connected to the bottom of the accommodating lower slot and is fixedly connected to the first lower slot wall on one side; The second lower slot limiting piece is parallel to the first lower slot wall; the first lower slot limiting piece is fixedly connected to the bottom of the accommodating lower slot and is fixedly connected to the second lower slot wall on one side; the second limiting piece groove sequentially includes a rectangular upper slot portion and a semi-circular lower slot portion from the slot opening to the slot bottom, and the tail section of the interface enters the semi-circular lower slot portion from the rectangular upper slot portion of the second limiting piece groove; An interface head section support piece is also fixedly arranged in the accommodating lower slot. A support groove is formed on the surface of the interface head section support piece facing the accommodating upper slot, and a part of the interface head section is embedded in the support groove; The interface head section support piece is parallel to the first lower slot wall; the interface head section support piece is fixedly connected to the bottom of the accommodating lower slot and is fixedly connected to the second lower slot wall on one side; An enhancing piece is also fixedly arranged in the accommodating lower slot. The enhancing piece is parallel to the second lower slot wall; the enhancing piece is fixedly connected to the bottom of the accommodating lower slot, one side of the enhancing piece is fixedly connected to the interface head section support piece, and the other side is fixedly connected to the second lower slot limiting piece; At least one interface limiting block support piece is also fixedly arranged in the accommodating lower slot. The interface limiting block support piece is fixedly connected to the bottom of the accommodating lower slot, and the surface of the interface limiting block facing the bottom of the accommodating lower slot abuts against the interface limiting block support piece; The interface limiting block support piece is parallel to the second lower slot wall, and one side of the interface limiting block support piece is fixedly connected to the first lower slot wall.

8. The battery case according to claim 3, characterized in that, The battery module includes at least one battery. A battery limiting elastic member is fixedly connected to the surface of the battery facing the accommodating upper slot. The surface of the battery limiting elastic member away from the battery abuts against the bottom of the accommodating upper slot; the battery limiting elastic member is a fireproof sponge glue; The battery module includes a circuit protection board, and the battery is fixedly connected to the circuit protection board; the circuit protection board is fixedly connected with a power cord, and one end of the power cord away from the circuit protection board is fixedly connected to the interface tail section.

9. The battery case according to claim 1, wherein A welding slot is provided on the surface of the upper shell in contact with the lower shell and is arranged around the notch of the upper accommodating groove, and a welding convex edge is fixedly provided on the surface of the lower shell in contact with the upper shell and is arranged around the notch of the lower accommodating groove; or, a welding convex edge is fixedly provided on the surface of the upper shell in contact with the lower shell and is arranged around the notch of the upper accommodating groove, and a welding slot is provided on the surface of the lower shell in contact with the upper shell and is arranged around the notch of the lower accommodating groove; The welding convex edge is inserted into the welding slot, and an ultrasonic welding seam is formed between the welding convex edge and the welding slot; The welding convex edge includes a rectangular convex bottom and a triangular convex tip which are fixedly connected, the tip of the triangular convex tip points to the bottom of the welding slot, the thick end of the triangular convex tip is fixedly connected to the rectangular convex bottom, and one end of the rectangular convex bottom away from the triangular convex tip is fixedly connected to the upper shell or the lower shell; An art upper notch with two open sides is provided on the surface of the upper shell in contact with the lower shell and away from the outer edge of the upper accommodating groove, and an art lower notch with two open sides is provided on the surface of the lower shell in contact with the upper shell and away from the outer edge of the lower accommodating groove, and the art upper notch and the art lower notch are combined to form an art groove.

10. The battery box according to claim 3, characterized in that, An interface limiting block through hole is provided on the interface limiting block, and an annular limiting portion is fixedly arranged in a ring shape in the interface limiting block through hole. One end of the interface head section away from the interface middle section is inserted into the interface limiting block through hole and contacts the annular limiting portion; The lower groove limiting structure includes a lower groove second limiting piece for limiting the movement of the power interface. The outer diameter of the interface middle section is larger than the outer diameter of the interface tail section. A second limiting piece groove is provided on the surface of the lower groove second limiting piece facing the upper accommodating groove. One end of the interface tail section connecting the interface middle section is embedded in the second limiting piece groove, and the surface of the interface middle section contacting the lower groove second limiting piece; The interface head section and the interface limiting block through hole are in interference connection.

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