BDU box and BDU system

Abstract

The utility model relates to the technical field of batteries, in particular to a BDU box and a BDU system. The BDU box body in the BDU system comprises a box cover and a box body main body, the box body main body is provided with a containing cavity used for containing a relay, the containing cavity is provided with an opening, the relay can be placed in the containing cavity along the opening, the box cover is connected with the box body main body and seals the opening, a buckling piece is arranged on the cavity wall, opposite to the opening, in the containing cavity, and the buckling piece and the box body main body are integrally formed. The buckling piece can be clamped and fixed with the penetrating hole in the relay, relative fixation of the relay and the containing cavity is guaranteed, the structure is simple, operation is convenient, the fixing effect of the relay and the box body is good, and the installation efficiency of the relay and the box body is high.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle batteries, in particular to a BDU box and a BDU system. Background Art

[0002] BDU, or Battery Disconnect Unit, is an important component in the battery system of new energy vehicles. It is mainly used to quickly disconnect the battery from the vehicle circuit in emergency situations such as collisions and short circuits to prevent safety accidents. BDU generally includes BDU box, relays, pre-charge resistors, Hall devices, busbars and other components.

[0003] In the related art, the relay and the BDU box are fixed by threading. Specifically, during the injection molding process of the BDU box, a nut is embedded in the injection mold so that the nut is fixed in the injection-molded BDU box. Then the relay is placed in the BDU box, and a screwing tool is used to pass the bolt through the hole on the relay and then fix it with the nut thread in the BDU box. This fixing method is not only complicated to operate and difficult to fix, but also has low fixing efficiency and cannot meet actual production needs.

[0004] Therefore, it is urgent to invent a BDU box and a BDU system to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a BDU box and a BDU system, so as to realize the clamping fixation between the relay and the BDU box, and improve the installation efficiency of the relay and the BDU box.

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

[0007] BDU box, including:

[0008] Box cover; and

[0009] A box body, wherein the box body has a receiving cavity for receiving the relay, the receiving cavity has an opening, the relay can be placed in the receiving cavity along the opening, and the box cover is connected and fixed to the box body and blocks the opening;

[0010] A clamping piece is provided on the cavity wall of the accommodating cavity opposite to the opening, and the clamping piece can be clamped and fixed with the through hole on the relay.

[0011] As an optional solution, an isolation structure is also provided on the box body, and the isolation structure is used to split and isolate the accommodating cavity into at least two accommodating areas, each of which corresponds to one of the relays, and a clamping piece is provided on the cavity wall opposite to the opening in each of the accommodating areas.

[0012] As an optional solution, at least two of the clips are provided in each of the accommodating areas, at least two of the clips are spaced apart along the outer contour of the relay, at least two of the through holes are spaced apart on the outer peripheral wall of the relay, and each of the clips is snap-connected and fixed to one of the through holes.

[0013] As an optional solution, a U-shaped fastener is provided on the outer peripheral wall of the box cover close to one end of the box body, and the U-shaped fastener extends in a direction close to the box body and extends out of the box cover, and a first limiting protrusion is provided on the outer peripheral wall of the box body, and the U-shaped fastener is clamped and fixed to the first limiting protrusion.

[0014] As an optional solution, at least two of the U-shaped fasteners are provided on the box cover, and at least two of the U-shaped fasteners are arranged on the outer circumferential wall of the box cover at circumferential intervals along the box cover, and at least two of the first limiting protrusions are arranged on the outer circumferential wall of the box body at circumferential intervals, and each of the U-shaped fasteners is clamped and fixed to one of the first limiting protrusions.

[0015] As an optional solution, a protective structure is provided on the box cover, the protective structure is detachably connected to the box cover, and the protective structure cover is provided outside the output pole of the relay.

[0016] As an optional solution, a mounting notch is provided on the box cover, a pressing portion is provided on the outer wall of the protection structure, a second limiting protrusion is provided on the outer end surface of the pressing portion, and the second limiting protrusion is clamped and fixed to the mounting notch.

[0017] As an optional solution, the lead-in angle of the clamping member is α, 15°≤α≤55°;

[0018] The disassembly angle of the clamping member is β, 45°≤β≤90°.

[0019] As an optional solution, the clamping member is integrally formed with the box body.

[0020] The BDU system includes a Hall device, a pre-charging resistor, a collection harness, a bus, a relay, and the BDU box as described above. The Hall device, the pre-charging resistor, and the relay are all accommodated and fixed in the BDU box, and the collection harness is used to connect the Hall device, the pre-charging resistor, the relay, and the bus.

[0021] Beneficial effects of the utility model:

[0022] The BDU box provided by the utility model has a accommodating cavity for accommodating a relay in a box body, and an opening in the accommodating cavity, so that the relay can be placed in the accommodating cavity along the opening, and a box cover is provided to be connected with the box body and close the opening, thereby realizing the accommodation of the relay in the BDU box, and a snap fastener is provided on a cavity wall opposite to the opening in the accommodating cavity so that the snap fastener is snap-fitted and fixed with a through hole on the relay, thereby ensuring the relative fixation of the relay and the accommodating cavity, the utility model has a simple structure, is easy to operate, has a good fixing effect between the relay and the box body, has a high installation efficiency between the relay and the box body, and meets actual installation requirements.

[0023] The utility model also provides a BDU system, which realizes the accommodation and fixation of the relay in the BDU box by applying the above-mentioned BDU box, which can not only ensure the stable installation of the relay and the BDU box, but also improve the assembly efficiency of the relay and the BDU box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a BDU system provided by an embodiment of the utility model;

[0025] Figure 2 It is an exploded schematic diagram of a BDU system provided by an embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional schematic diagram of a BDU system provided by an embodiment of the utility model;

[0027] Figure 4 yes Figure 3 A partial enlarged schematic diagram in the middle;

[0028] Figure 5 It is a structural schematic diagram of a clamping member provided in an embodiment of the utility model;

[0029] Figure 6 It is a top view of the box body provided by the embodiment of the utility model;

[0030] Figure 7 It is a structural schematic diagram of a protection structure provided by an embodiment of the utility model;

[0031] Figure 8 It is a cross-sectional schematic diagram of a box cover and a protective structure provided by an embodiment of the utility model;

[0032] Fig. 9 It is a circuit schematic diagram of a BDU system provided in an embodiment of the utility model.

[0033] In the figure:

[0034] 100, BDU box; 110, box body; 111, accommodating chamber; 1111, first accommodating area; 1112, second accommodating area; 1113, third accommodating area; 112, clamping member; 113, isolation structure; 1131, first isolation member; 1132, second isolation member; 1133, third isolation member; 1134, fourth isolation member; 1135, fifth isolation member; 114, first limiting protrusion;

[0035] 120, box cover; 121, protection structure; 1211, pressing portion; 12111, second limiting protrusion; 122, U-shaped buckle; 123, installation notch;

[0036] 200, relay; 210, penetration hole. DETAILED DESCRIPTION

[0037] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] like Figure 1 As shown, this embodiment provides a BDU system, which includes a Hall device, a pre-charge resistor, a collection harness, a bus, a relay 200 and the above-mentioned BDU box 100, the bus serves as the output pole of the relay 200, the Hall device, the pre-charge resistor and the relay 200 are all accommodated and fixed in the BDU box 100, and the collection harness is used to connect the Hall device, the pre-charge resistor, the relay 200 and the bus.

[0042] In the prior art, the relay 200 and the BDU housing 100 are fixed by threading. Specifically, during the injection molding process of the BDU housing 100, a nut is embedded in the injection mold so that the nut is fixed in the injection-molded BDU housing 100, and then the relay 200 is placed in the BDU housing 100, and a screwing tool is used to pass the bolt through the through hole 210 on the relay 200 and then threadedly fixed with the nut in the BDU housing 100. This fixing method is not only complicated to operate and difficult to fix, but also has low fixing efficiency and cannot meet actual production needs.

[0043] In order to solve the above problems, Figure 1 to Figure 4As shown, this embodiment provides a BDU box 100. The BDU box 100 includes a box body 110 and a box cover 120, wherein the box body 110 has a receiving cavity 111 for receiving a relay 200, the receiving cavity 111 has an opening, and the relay 200 can be placed in the receiving cavity 111 along the opening, the box cover 120 is connected to the box body 110 and closes the opening, and a clamping member 112 is provided on the cavity wall of the receiving cavity 111 opposite to the opening, and the clamping member 112 can be clamped and fixed with a through hole 210 on the relay 200. The BDU box 100 is provided with a housing cavity 111 for accommodating the relay 200 in the box body 110, and an opening is opened in the housing cavity 111, so that the relay 200 can be placed in the housing cavity 111 along the opening, and a box cover 120 is provided to be connected with the box body 110 and close the opening, thereby realizing the accommodation of the relay 200 in the BDU box 100, and a clamping piece 112 is provided on the cavity wall opposite to the opening in the housing cavity 111, so that the clamping piece 112 is clamped and fixed with the through hole 210 on the relay 200, thereby ensuring the relative fixation of the relay 200 and the housing cavity 111, the structure is simple, the operation is convenient, the fixing effect of the relay 200 and the box body 110 is good, the installation efficiency of the relay 200 and the box body 110 is high, and the actual installation requirements are met.

[0044] Specifically, the clamping member 112 is integrally formed with the box body 110. By integrally forming the clamping member 112 with the box body 110, the production efficiency of the box body 110 can be effectively improved and the production difficulty of the box body 110 can be reduced compared with the production method of pre-embedded nuts in the prior art. In addition, the clamping member 112 is integrally formed with the box body 110. When the relay 200 is subsequently installed, it is only necessary to place the relay 200 along the opening on the box body 110 and make the through hole 210 face the clamping member 112, which is simple to operate.

[0045] It should be noted that, in this embodiment, the box body 110 and the box cover 120 are both separately processed and formed by injection molding. Injection molding has high production efficiency, and the products produced are of high precision and consistent specifications. In other embodiments, the box body 110 and the box cover 120 can also be processed and formed by stamping or other integrated molding methods, which is not specifically limited in this embodiment.

[0046] When the relay 200 needs to be accommodated and fixed in the BDU box 100, first open the box cover 120 to open the opening of the accommodating cavity 111, then put the relay 200 into the accommodating cavity 111 along the opening, and snap-fit ​​the through hole 210 on the relay 200 to the cavity wall at one end of the accommodating cavity 111 opposite to the opening, so as to complete the accommodation and fixation of the relay 200 and the box body 110, and finally reconnect the box cover 120 to the box body 110 and close the opening, so as to complete the accommodation and fixation of the relay 200 and the BDU box 100.

[0047] In addition, in this embodiment, for the accommodation and fixation of the Hall device and the box body 110, and the accommodation and fixation of the pre-charging resistor and the box body 110, the clamping member 112 can be clamped and fixed to the mounting hole on the Hall device, and the clamping member 112 can be clamped and fixed to the mounting hole on the pre-charging resistor, and this embodiment does not make specific limitations.

[0048] Since the through hole 210 in the relay 200 is a circular hole, the clamping member 112 is a circumferential buckle to ensure the clamping effect between the clamping member 112 and the through hole 210. By setting the clamping member 112 as a circumferential buckle, the structural characteristics of the circumferential buckle can be utilized to ensure the clamping and fixing effect between the circumferential buckle and the circular through hole 210.

[0049] In addition, if Figure 5 As shown, the introduction angle of the clamping member 112 is α, 15°≤α≤55°, and the disassembly angle of the clamping member 112 is β, 45°≤β≤90°. By limiting the introduction angle α of the clamping member 112 to 15°~55°, the clamping member 112 can be easily inserted into the through hole 210 quickly and labor-savingly. By limiting the disassembly angle β of the clamping member 112 to 45°~90°, the clamping member 112 can be made to slide out of the through hole 210 with a greater force, so as to ensure the clamping effect between the clamping member 112 and the through hole 210. It should be noted that, in this embodiment, the introduction angle α of the clamping member 112 is 30°, and the disassembly angle β of the clamping member 112 is 50°. In other embodiments, the specific value of the introduction angle α of the clamp 112 can be arbitrarily adjusted within the range of 15° to 55°, and the specific value of the disassembly angle β of the clamp 112 can be arbitrarily adjusted within the range of 45° to 90°, which is not specifically limited in this embodiment.

[0050] As an alternative, Figure 6As shown, an isolation structure 113 is also provided on the box body 110, and the isolation structure 113 is used to split and isolate the accommodating cavity 111 into at least two accommodating areas, each of which corresponds to a relay 200, and a clamping member 112 is provided on the cavity wall opposite to the opening in each accommodating area. By using the isolation structure 113 to split the accommodating cavity 111 into at least two accommodating areas, each of which corresponds to a relay 200, and a clamping member 112 is provided on the cavity wall opposite to the opening in each accommodating area, a plurality of relays 200 can be individually clamped and fixed to the box body 110.

[0051] It should be noted that, in this embodiment, there are a total of three relays 200, namely a positive pole relay, a negative pole relay and a fast charging relay. The isolation structure 113 includes a first isolation member 1131, a second isolation member 1132, a third isolation member 1133, a fourth isolation member 1134 and a fifth isolation member 1135 which are arranged at intervals. The first isolation member 1131 and the second isolation member 1132 jointly divide the first accommodating area 1111 from the accommodating cavity 111, the second isolation member 1132 and the third isolation member 1133 jointly divide the accommodating cavity 111 into a second accommodating area 1112, the third isolation member 1133, the fourth isolation member 1134 and the fifth isolation member 1135 jointly divide the third accommodating area 1113 from the accommodating cavity 111, the negative pole relay is accommodated in the first accommodating area 1111, the fast charging relay is accommodated in the second accommodating area 1112, and the positive pole relay is accommodated in the third accommodating area 1113. In other embodiments, the specific number of relays 200 may be adjusted according to actual needs, and the specific number of isolation components in the isolation structure 113 may be adjusted according to actual needs, which is not specifically limited in this embodiment.

[0052] In order to further improve the fixing effect of the positive relay, the negative relay and the fast charging relay, in the present embodiment, at least two clips 112 are arranged in the first accommodating area 1111, the second accommodating area 1112 and the third accommodating area 1113. The at least two clips 112 in the first accommodating area 1111, the second accommodating area 1112 and the third accommodating area 1113 are respectively arranged at intervals along the outer contours of the positive relay, the negative relay and the fast charging relay. At least two through holes 210 are arranged at intervals on the outer peripheral walls of the positive relay, the negative relay and the fast charging relay. Each clip 112 is clipped and fixed to a through hole 210, so that at least two clips 112 are simultaneously clipped and fixed to the positive relay, the negative relay and the fast charging relay, so as to further improve the fixing effect of the positive relay, the negative relay and the fast charging relay.

[0053] It should be noted that, in the present embodiment, the outer contours of the positive relay, the negative relay and the fast charging relay are all rectangular, and two clips 112 are provided in the first accommodating area 1111, the second accommodating area 1112 and the third accommodating area 1113. The two clips 112 are arranged opposite to each other along the diagonal direction of the rectangular contour, so as to maximize the fixing effect of the clips 112 on the positive relay, the negative relay and the fast charging relay on the basis of reducing the number of the clips 112. In other embodiments, three, four or more clips 112 can be arranged at intervals along the outer contours of the positive relay, the negative relay and the fast charging relay according to actual needs. It is only necessary to provide corresponding through holes 210 on the outer peripheral walls of the positive relay, the negative relay and the fast charging relay to ensure that each clip 112 is fixedly connected to a through hole 210. This embodiment does not make specific limitations.

[0054] In an alternative embodiment, if Figure 1 and Figure 2 As shown, a U-shaped snap fastener 122 is provided on the outer peripheral wall of the box cover 120 close to the box body 110, and the U-shaped snap fastener 122 extends in the direction close to the box body 110 and protrudes from the box cover 120. A first limiting protrusion 114 is provided on the outer peripheral wall of the box body 110, and the U-shaped snap fastener 122 is fixedly engaged with the first limiting protrusion 114. By providing the U-shaped snap fastener 122 on the outer peripheral wall of the box cover 120 close to the main body, so that the U-shaped snap fastener 122 extends in the direction close to the box body 110 and protrudes from the box cover 120, and providing the first limiting protrusion 114 on the outer peripheral wall of the box body 110, the U-shaped snap fastener 122 is connected and fixedly engaged with the first limiting protrusion 114, and the box cover 120 is connected and fixedly engaged with the box body 110 by the fixing of the U-shaped snap fastener 122 and the first limiting protrusion 114, and the structure is simple and the design is ingenious. Specifically, when it is necessary to connect and fix the box cover 120 to the box body 110, first move the box cover 120 to the top of the box body 110, and then drive the box cover 120 downward until the first limiting protrusion 114 on the box body 110 is snap-fitted and fixed in the U-shaped groove of the U-shaped snap member 122. At this time, the lower end surface of the box cover 120 just abuts against the upper end surface of the box body 110 to complete the snap-fit ​​fixation of the box body 110 and the box cover 120.

[0055] In order to further improve the buckling and fixing effect of the box body 110 and the box cover 120, at least two U-shaped buckles 122 are arranged on the box cover 120 at intervals along the circumference of the box cover 120 on the outer peripheral wall of the box cover 120, and at least two first limiting protrusions 114 are arranged at intervals on the outer peripheral wall of the box body 110, and each U-shaped buckle 122 is buckled and fixed with one first limiting protrusion 114. By arranging at least two first limiting protrusions 114 at intervals on the outer peripheral wall of the box body 110 and arranging at least two U-shaped buckles 122 at intervals on the outer peripheral wall of the box cover 120, each U-shaped buckle 122 is buckled and fixed with one first limiting protrusion 114, and the box body 110 and the box cover 120 are buckled and fixed together by using at least two U-shaped buckles 122 and at least two first limiting protrusions 114. It should be noted that, in the present embodiment, four first position-limiting protrusions 114 are arranged at intervals along the circumferential direction on the outer peripheral wall of the box body 110, and four U-shaped buckles 122 are arranged at intervals along the circumferential direction on the outer peripheral wall of the box cover 120. In other embodiments, the specific number of the U-shaped buckles 122 and the first position-limiting protrusions 114 can also be adjusted according to actual needs, and it is only necessary to ensure that each U-shaped buckle 122 is arranged corresponding to one first position-limiting protrusion 114, which is not specifically limited in the present embodiment.

[0056] As an alternative, Figure 1 , Figure 7 as well as Figure 8 As shown, a protective structure 121 is provided on the box cover 120, and the protective structure 121 is detachably connected to the box cover 120, and the protective structure 121 is covered outside the output pole of the relay 200. By detachably installing the protective structure 121 on the box cover 120, the protective structure 121 is covered on the periphery of the output pole of the relay 200, which can improve the protection of the output pole of the relay 200.

[0057] In this embodiment, the box cover 120 is provided with a mounting notch 123, the outer wall of the protection structure 121 is provided with a pressing portion 1211, the outer end surface of the pressing portion 1211 is provided with a second limiting protrusion 12111, and the second limiting protrusion 12111 is fixedly engaged with the mounting notch 123. By providing the mounting notch 123 on the box cover 120, providing the pressing portion 1211 on the outer wall of the protection structure 121, and providing the second limiting protrusion 12111 on the outer end surface of the pressing portion 1211, and utilizing the second limiting protrusion 12111 to be fixedly engaged with the mounting notch 123, the box cover 120 and the protection structure 121 can be detachably fixed.

[0058] Specifically, when the protective structure 121 and the box cover 120 need to be fixed together, the protective structure 121 is first aligned with the mounting notch 123 in the up and down directions. Then, while driving the protective structure 121 to move downward, a force is applied to the pressing portion 1211 in a direction away from the side wall of the mounting notch 123 opposite to it, so that the second limiting protrusion 12111 on the outer end surface of the pressing portion 1211 can move from the upper end of the mounting notch 123 to the lower end of the mounting notch 123. Then, the pressing portion 1211 is released, the pressing portion 1211 moves and resets, and the upper end surface of the second limiting protrusion 12111 is abutted against the lower end surface of the box cover 120, thereby realizing the clamping fixation of the protective structure 121 and the box cover 120. When it is necessary to disassemble the protective structure 121 and the box cover 120 that are fixed together, first, a force is applied to the pressing portion 1211 in a direction away from the side wall of the installation notch 123 opposite to it, and then the protective structure 121 is driven to move upward so that the second limiting protrusion 12111 on the outer end surface of the pressing portion 1211 can smoothly move from the lower end of the installation notch 123 to the upper end of the installation notch 123, thereby completing the disassembly of the protective structure 121 and the box cover 120.

[0059] It should be noted that, in this embodiment, the protective structure 121 is manufactured by injection molding. Injection molding has high production efficiency, and the products produced are of high precision and consistent specifications. In other embodiments, the protective structure 121 can also be manufactured by stamping or other one-piece molding methods, which is not specifically limited in this embodiment.

[0060] As an optional solution, in order to minimize the size specifications of the output pole of the relay 200 while meeting the functional requirements of the output pole of the relay 200, the box cover 120 is provided with a plurality of protective structures 121 and a plurality of mounting notches 123 at intervals along its circumference, and each mounting notch 123 is arranged corresponding to a protective structure 121, so that the output pole of the relay 200 can extend toward the outside of the BDU box 100 along the shortest distance, so as to achieve the effect of reducing the size specifications of the output pole of the relay 200.

[0061] It should be noted that, in this embodiment, Figure 1 and Fig. 9As shown, the output pole of the relay 200 includes a battery positive pole, a battery negative pole, a fast-charging positive pole, a fast-charging negative pole, a slow-charging positive pole, a slow-charging negative pole, a discharge positive pole and a discharge negative pole, and the box cover 120 is provided with four protective structures 121 and four mounting notches 123 along its circumferential intervals, wherein the battery positive pole and the slow-charging positive pole are a group, the two are opposite to one mounting notch 123 and are jointly protected by a protective structure 121; the fast-charging positive pole and the discharge positive pole are a group, the two are opposite to one mounting notch 123 and are jointly protected by a protective structure 121; the slow-charging negative pole, the discharge negative pole and the fast-charging negative pole are a group, the three are opposite to one mounting notch 123 and are jointly protected by a protective structure 121; the battery negative pole is a separate group, the battery negative pole is separately opposite to one mounting notch 123 and is protected by a protective structure 121.

[0062] In an optional embodiment, a wiring buckle is further provided on the cavity wall of the accommodating cavity 111 of the BDU box 100, and the wiring buckle is configured to clamp and fix the collection wire harness. By providing the wiring buckle on the cavity wall of the accommodating cavity 111 of the BDU box 100 and clamping and fixing the collection wire harness with the wiring buckle, the collection wire harness in the BDU box 100 can be effectively organized and stored, which is convenient for subsequent inspection and maintenance.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. BDU box, characterized in that: include: A box cover (120); and A box body (110), the box body (110) having a receiving cavity (111) for receiving a relay (200), the receiving cavity (111) having an opening, the relay (200) being able to be placed in the receiving cavity (111) along the opening, and the box cover (120) being connected to the box body (110) and closing the opening; A clamping piece (112) is provided on a cavity wall of the accommodating cavity (111) opposite to the opening, and the clamping piece (112) can be clamped and fixed with a through hole (210) on the relay (200).

2. The BDU box according to claim 1, characterized in that: The box body (110) is also provided with an isolation structure (113), and the isolation structure (113) is used to split and isolate the accommodating cavity (111) into at least two accommodating areas, each of which corresponds to one of the relays (200), and a clamping piece (112) is provided on the cavity wall of each of the accommodating areas that is opposite to the opening.

3. The BDU box according to claim 2, characterized in that: At least two of the clamping members (112) are arranged in each of the accommodating areas; at least two of the clamping members (112) are arranged at intervals along the outer contour of the relay (200); at least two of the through holes (210) are arranged at intervals on the outer peripheral wall of the relay (200); and each of the clamping members (112) is clamped and fixed to one of the through holes (210).

4. The BDU box according to any one of claims 1 to 3, characterized in that: A U-shaped snap fastener (122) is provided on the outer peripheral wall of the box cover (120) close to one end of the box body (110); the U-shaped snap fastener (122) extends in a direction close to the box body (110) and protrudes out of the box cover (120); a first limiting protrusion (114) is provided on the outer peripheral wall of the box body (110); the U-shaped snap fastener (122) is fixedly connected to the first limiting protrusion (114).

5. The BDU box according to claim 4, characterized in that: At least two of the U-shaped fasteners (122) are arranged on the box cover (120), and at least two of the U-shaped fasteners (122) are arranged on the outer peripheral wall of the box cover (120) at intervals along the circumference of the box cover (120). At least two of the first limiting protrusions (114) are arranged on the outer peripheral wall of the box body (110) at intervals along the circumference, and each of the U-shaped fasteners (122) is fixedly connected to one of the first limiting protrusions (114).

6. The BDU box according to any one of claims 1 to 3, characterized in that: The box cover (120) is provided with a protection structure (121), the protection structure (121) is detachably connected to the box cover (120), and the protection structure (121) is arranged to cover the outside of the output pole of the relay (200).

7. The BDU box according to claim 6, characterized in that: The box cover (120) is provided with a mounting notch (123), the outer wall of the protection structure (121) is provided with a pressing portion (1211), the outer end surface of the pressing portion (1211) is provided with a second limiting protrusion (12111), and the second limiting protrusion (12111) is fixedly engaged with the mounting notch (123).

8. The BDU box according to any one of claims 1 to 3, characterized in that: The introduction angle of the clamping member (112) is α, 15°≤α≤55°; The disassembly angle of the clamping member (112) is β, 45°≤β≤90°.

9. The BDU box according to any one of claims 1 to 3, characterized in that: The clamping member (112) and the box body (110) are integrally formed. 10.BDU system, characterized in that, The invention comprises a Hall device, a pre-charging resistor, a collection harness, a bus, a relay (200), and a BDU box as claimed in any one of claims 1 to 9, wherein the Hall device, the pre-charging resistor, and the relay (200) are all accommodated and fixed in the BDU box, and the collection harness is used to connect the Hall device, the pre-charging resistor, the relay (200), and the bus.

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