Buckle structure for BMS controller shell and BMS controller shell

Abstract

The utility model relates to a buckle structure for a BMS (Battery Management System) controller shell and the BMS controller shell. The BMS controller shell comprises a body and a cover body suitable for being assembled on the body, and the buckle structure comprises a buckle movable part which extends out of one of the cover body and the body and is provided with a through hole and a buckle fixed part which extends out of the other one of the cover body and the body. And the buckle fixing part penetrates through the through hole and is clamped on the bottom edge of the through hole, so that the cover body is fixed on the body. The buckle fixing part comprises two elastic clamping jaws with hook parts at the tail ends, and the two elastic clamping jaws are configured to be capable of penetrating through the through hole through elastic deformation when the two elastic clamping jaws get close to each other and rebound away from each other so that the hook parts of the two elastic clamping jaws can be hooked to the two transverse peripheral parts of the through hole respectively. The buckle structure provided by the utility model can reduce the risk that the BMS controller shell is separated when being twisted or subjected to other external forces.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management system (hereinafter referred to as "BMS"), and more specifically to a buckle structure adopted by shells of various controllers in the BMS, and a BMS controller shell including the buckle structure. Background Art

[0002] With the development of the international new energy industry, the research and development of new energy vehicles, especially electric vehicles with power batteries as the driving source, has been continuously promoted. The battery management system (BMS) is the core component of electric vehicles. Its main function is to intelligently manage and maintain each battery cell of the power battery, prevent the battery from overcharging and overdischarging, extend the battery life, monitor the battery status, etc. In order to achieve these functions, the BMS includes a variety of controllers, such as the BMU master controller, CSC slave controller, HVU high-voltage controller, etc. These controllers are mainly composed of electronic control components installed in a shell.

[0003] The BMS controller housing generally includes a body and a cover body suitable for being assembled on the body. When the cover body and the body are assembled together, an inner cavity for accommodating control components is defined. In order to provide good protection for the contained control components, the cover body is required to be firmly assembled on the body. The known housing fixes the cover body and the body together by a snap-on structure arranged on the outside thereof. The snap-on structure includes a snap-on movable part extending from the cover body and having a through hole and a snap-on fixing part extending from the body. The cover body is fixed to the body by passing the snap-on fixing part through the through hole of the snap-on movable part and snapping into the through hole. However, it has been found that this snap-on structure is easy to disengage when the BMS controller housing is subjected to torsion or other external forces (such as the impact generated by a collision accident of a car equipped with the controller or the vibration generated during normal driving, etc.). Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other defects in the prior art.

[0005] After careful research, the inventor found that in the above-mentioned known housing buckle structure, the buckle fixing part is only composed of a single claw, which basically only generates a clamping connection at the bottom edge of the through hole after passing through the through hole in the buckle movable part, thereby only limiting the movement of the buckle movable part in the up-down direction or vertical direction, but the claw does not form any clamping connection with the through hole in the left-right direction or horizontal direction, which causes the single claw to be easily disengaged when the housing is subjected to torsion or other external forces. Based on the above findings, the utility model conceives the following technical solutions to solve the relevant technical problems.

[0006] One aspect of the utility model provides a buckle structure for a BMS controller housing, the BMS controller housing includes a body and a cover body suitable for being assembled on the body, the buckle structure includes a buckle movable part extending from one of the cover body and the body and having a through hole, and a buckle fixing part extending from the other of the cover body and the body, and is configured to fix the cover body on the body by passing the buckle fixing part through the through hole and being clamped to the bottom edge of the through hole. The buckle fixing part includes two elastic claws with hooks at the ends, and the two elastic claws are configured to pass through the through hole by elastically deforming close to each other, and rebound away from each other so that their respective hooks can be hooked on the two lateral peripheral portions of the through hole respectively.

[0007] According to an embodiment of the utility model, the buckle fixing portion further includes an intermediate claw disposed between the two elastic claws and configured to be able to be clamped to the bottom edge of the through hole via the bottom surface of the intermediate claw.

[0008] According to an embodiment of the present utility model, the buckle fixing portion is configured to be able to be clamped to the bottom edge of the through hole via the bottom surfaces of the two elastic claws.

[0009] According to an embodiment of the utility model, a guiding inclined surface for guiding the elastic claw to pass through the through hole is arranged on the hook portion of the elastic claw and / or the transverse peripheral portion of the through hole.

[0010] According to one embodiment of the utility model, the snap-fit ​​movable portion is suspended and extended from one of the cover body and the main body, and is configured to avoid the snap-fit ​​fixing portion by elastic deformation when moving toward the snap-fit ​​fixing portion and then allow the snap-fit ​​fixing portion to pass through the through hole by rebounding.

[0011] According to an embodiment of the present utility model, a guiding inclined surface is provided at the bottom end of the buckle movable part and / or the top end of the buckle fixed part to facilitate guiding the buckle movable part to avoid the buckle fixed part.

[0012] Another aspect of the present invention provides a BMS controller housing, which includes a body, a cover body suitable for being assembled on the body, and a snap-on structure according to any one of the above items.

[0013] According to one embodiment of the utility model, the buckle movable part in the buckle structure is formed as one piece with one of the cover body and the body by injection molding, and the buckle fixing part in the buckle structure is formed as one piece with the other of the cover body and the body by injection molding.

[0014] According to an embodiment of the present invention, the BMS controller housing is in a rectangular shape, and at least one snap-fit ​​structure is provided on each side wall thereof.

[0015] According to an embodiment of the present utility model, the buckle movable part in the buckle structure is arranged on the cover body, and the buckle fixing part in the buckle structure is arranged on the main body.

[0016] The buckle fixing part in the buckle structure of the BMS controller housing of the utility model has at least two elastic claws with hooks, and the corresponding two hooks can pass through the through hole of the buckle movable part by making the two elastic claws close to each other and deform elastically, and then the two hooks can be hooked on the corresponding two lateral peripheral parts of the through hole after the two elastic claws rebound away from each other. The two elastic claws can not only limit the movement of the buckle movable part relative to the buckle fixing part in the left and right directions or in the lateral direction, but also prevent the buckle fixing part from escaping from the through hole of the buckle movable part by using the hooks, and have a self-locking effect. In addition, the bottom surface of the elastic claw and / or the optional middle claw can be used to clamp the bottom edge of the through hole to achieve the basic buckling action of the cover on the body. The buckle structure of the utility model can limit the movement of the buckle movable part relative to the buckle fixing part in the vertical, lateral and perpendicular directions to the vertical and lateral directions, thereby reducing the risk of the buckle structure being disengaged when the BMS controller housing is subjected to torsion or other external forces, and improving the assembly firmness and safety of the BMS controller housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0018] Figure 1 It is a stereoscopic view of a BMS controller housing with a snap-fit ​​structure according to an embodiment of the utility model.

[0019] Figure 2 yes Figure 1 The schematic diagram shown is a schematic diagram of the cover and body of the BMS controller housing in a disassembled state, especially showing the outer side of the snap structure.

[0020] Figure 3 yes Figure 1 The schematic diagram shown is a section of a BMS controller housing along one of the elastic claws of the snap-fit ​​fixing portion.

[0021] Figure 4 It is shown Figure 1 A three-dimensional view of the inner side of the buckle movable part of the buckle structure.

[0022] Description of reference numerals:

[0023] 1. Main body; 2. Cover body; 3. Buckle movable part; 31. Through hole; 311. Transverse peripheral part; 4. Buckle fixing part; 41. Elastic claw; 411. Hook; 42. Middle claw; 5. Guide slope; 6. Guide slope. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless clearly stated in the claims.

[0025] Figure 1 and Figure 2 The BMS controller housing according to an embodiment of the utility model is shown. The BMS controller housing may include a body 1, a cover 2 and at least one buckle structure according to the utility model for assembling the cover 2 to the body 1. The BMS controller housing shown in this embodiment is in the shape of a rectangular parallelepiped as a whole, and one such buckle structure is provided on each of its side walls. It can be understood that in other embodiments, for example, when the BMS controller housing is large, more than two buckle structures may be provided on each of its side walls. And for example, when the BMS controller housing is small and not prone to twisting, only one buckle structure according to the utility model may be provided on one or part of the side walls, while the remaining side walls still use conventional buckle structures, which is conducive to simplifying manufacturing and reducing costs. The body 1 may include a bottom wall and a higher side wall extending from the periphery of the bottom wall to one side, and the cover 2 may include a top wall or an optional lower side wall, and the cover 2 is connected and fixed to the body 1 via a buckle structure and jointly defines a cavity for accommodating electronic control components, thereby constituting a BMS controller housing having a top wall, a bottom wall and a side wall.

[0026] like Figure 1 and Figure 2As shown, the snap-fit ​​structure according to this embodiment may include a snap-fit ​​movable portion 3 and a snap-fit ​​fixing portion 4. The snap-fit ​​movable portion 3 extends from the cover body 2 and has a through hole 31, and the snap-fit ​​fixing portion 4 extends from the body 1 and can pass through the through hole 31. By designing the through hole 31 of the snap-fit ​​movable portion 3 and the position and size of the snap-fit ​​fixing portion 4, the snap-fit ​​fixing portion 4 can be snapped to the bottom edge of the through hole 31 after passing through the through hole 31, thereby fixing the cover body 2 to the body 1. In some other embodiments, if the cover body 2 has a certain thickness or the cover body 2 also has a relatively high side wall, the setting positions of the snap-fit ​​movable portion 3 and the snap-fit ​​fixing portion 4 can be interchanged, that is, the snap-fit ​​movable portion 3 is arranged on the body 1, and the snap-fit ​​fixing portion 4 is arranged on the cover body 2.

[0027] For the convenience of description, the directional terms such as "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal" etc. used in this article are always defined based on the positional relationship that the buckle movable part 3 is at the top and the buckle fixed part 4 is at the bottom. Figure 1 and 2 For the embodiment shown in the figure, this definition is consistent with the orientation relationship shown in the figure, and the direction or position of the relevant components, parts or features can be directly described according to the orientation shown in the figure. Figure 1 and 2 If the setting positions of the snap-on movable part 3 and the snap-on fixing part 4 are interchanged (i.e., the snap-on movable part 3 is arranged on the main body 1, and the snap-on fixing part 4 is arranged on the cover body 2), the shell shown in the figure should be turned upside down 180 degrees so that the main body 1 and the snap-on movable part 3 are on the top and the cover body 2 and the snap-on fixing part 4 are on the bottom, and then the direction or position of the relevant components, parts or features are described according to the orientation shown in the figure.

[0028] According to one embodiment, Figure 1 and Figure 2 As shown, the buckle movable portion 3 may include a fixed section and a free section, wherein the fixed section extends from the cover body 2 toward the outside away from the cover body 2, and the free section extends from one end of the fixed section away from the cover body 2 along the assembly direction of the cover body 2 ( Figure 1 and Figure 2 The buckle movable portion 3 is configured to extend in a suspended manner from the cover body 2. In addition, the buckle movable portion 3 can be configured to avoid the buckle fixing portion 4 by elastic deformation when moving toward the buckle fixing portion 4 along the assembly direction. Figure 2 Taking the buckle movable portion 3 shown on the far left as an example, when it moves downward toward the buckle fixing portion 4, it can move to Figure 2The left side (also the outer side of the buckle movable part 3) undergoes elastic deformation (for example, such elastic deformation can be induced by contact with the buckle fixing part 4) to avoid the buckle fixing part 4. Next, after the bottom edge of the through hole 31 of the buckle movable part 3 passes over the buckle fixing part 4, the buckle movable part 3 can rebound to allow the buckle fixing part 4 to pass through the through hole 31, and the bottom surface of the buckle fixing part 4 is snapped onto the bottom edge of the through hole 31.

[0029] In order to facilitate the buckle movable part 3 to avoid the buckle fixed part 4 during the downward movement, a guide slope 6 which gradually tilts outward in the downward direction may be provided at the bottom end of the buckle movable part 3 (see FIG. Figure 2 The buckle movable part shown on the far right and Figure 4 The buckle movable part 3 shown in FIG. 1 ) and / or the top of the buckle fixing part 4 may be provided with a correspondingly inclined guide slope 6 (see FIG. 1 ). Figure 2 Under the action of these guiding inclined surfaces 6, the buckle movable part 3 can be elastically deformed outward more smoothly and avoid the buckle fixing part 4 during the process of moving toward the buckle fixing part 4, so that the cover body 2 can be assembled on the main body 1 conveniently and labor-savingly.

[0030] It should be noted that the buckle movable part 3 is not limited to the above-mentioned configuration of being overhanging and elastically deformable. For example, the buckle movable part 3 can also be hinged on the cover body 2 at its upper end, and the buckle fixing part 4 is buckled into the through hole 31 of the buckle movable part 3 by pivoting around the hinge.

[0031] exist Figure 2 In the example of the buckle structure shown in the center, the buckle movable part 3 is located above the buckle fixed part 4. The up-down direction can also be called the vertical direction, and the left-right direction can also be called the lateral direction. The buckle movable part 3 has two lateral peripheral parts (i.e., peripheral parts located in the left-right direction) 311 on the left and right sides of its through hole 31, which can also be simply referred to as the two lateral peripheral parts of the through hole in this article. The through hole 31 of the buckle movable part 3 can be, for example, square as shown in the figure, and in particular has a straight bottom edge to facilitate a firm snap connection. However, the through hole 31 can also be other suitable shapes that can achieve snap connection.

[0032] According to one embodiment, Figure 1 and Figure 2As shown, the buckle fixing part 4 may include two elastic claws 41 that are spaced apart and both extend from the body 1. The end of each elastic claw 41 (that is, the end facing away from the body 1) has a hook portion 411 on the side facing away from the other elastic claw 41. When the two elastic claws 41 are elastically deformed and approach each other, their respective hook portions 411 can avoid the two transverse peripheral portions 311 of the through hole 31, so that the two elastic claws 41 can pass through the through hole 31. Then, the two elastic claws 41 can rebound away from each other so that the two hook portions 411 can be hooked on the two transverse peripheral portions 311 respectively. In this way, the two elastic claws 41 can not only limit the movement of the buckle movable part 3 relative to the buckle fixing part 4 in the left-right direction or in the transverse direction, but also can use the hook portion 411 to prevent the buckle fixing part 4 from escaping from the through hole 31 of the buckle movable part 3, thereby achieving a self-locking effect. According to this configuration, the elastic claws or the buckle fixing portion can be disengaged from the through hole of the buckle movable portion only when the two elastic claws 41 are elastically deformed to approach each other again by external force.

[0033] In order to limit the upper and lower directions of the main body 1 and the cover 2, refer to Figure 1 and Figure 3 As shown, the bottom surfaces of the two elastic claws 41 can be engaged with the bottom edges of the through holes 31, thereby preventing the buckle movable part 3 from moving upward after buckling through the elastic claws 41. Accordingly, after the cover 2 is assembled onto the body 1, the periphery of the cover 2 can abut against the side wall of the body 1, thereby limiting the buckle movable part 3 from moving downward after buckling.

[0034] Optionally, the buckle fixing portion 4 may further include a middle claw 42 disposed between the two elastic claws 41. Figure 1 and Figure 2 As shown. Like the bottom surfaces of the two elastic claws 41, the bottom surface of the middle claw 42 can also be engaged with the bottom edge of the through hole 31, thereby increasing the strength of the buckle fixing portion 4 by utilizing the middle claw 42, and more reliably preventing the buckle movable portion 3 from moving upward after being engaged. It can be understood that, among the two elastic claws 41 and the middle claw 42, only the bottom surface of the middle claw 42 can be engaged with the bottom edge of the through hole 31, while the bottom surfaces of the two elastic claws 41 are not engaged with the bottom edge of the through hole. In this case, the middle claw 42 is used to limit the position in the vertical direction only, and the two elastic claws 41 are only used to limit the position in the horizontal direction and in the direction perpendicular to both the vertical and horizontal directions (i.e., perpendicular to the vertical direction). Figure 2 The upper limit of the paper direction).

[0035] Since the two elastic claws 41 and the middle claw 42 are arranged at intervals, the guiding inclined surface 6 formed on the buckle fixing portion 4 can be separately formed on the top ends of the two elastic claws 41 and the middle claw 42 to jointly guide the buckle movable portion 3 .

[0036] In the process of the two elastic claws 41 passing through the through hole 31, elastic deformation will occur. In order to better guide the elastic claws 41 to deform so that the hooks 411 thereof can avoid the transverse peripheral portion 311 of the through hole 31, a guiding inclined surface 5 may be provided on the hooks 411 of the elastic claws 41 or the transverse peripheral portion 311 of the through hole 31. Figure 2 and Figure 4 Of course, in order to further improve the guiding effect, the hook portion 411 and the transverse peripheral portion 311 may also be provided with a guiding slope 5. The provision of the guiding slope 5 is also conducive to conveniently and labor-savingly assembling the cover 2 onto the body 1.

[0037] The utility model also provides a BMS controller housing with the above-mentioned buckle structure, which includes but is not limited to a BMU main controller housing, a CSC slave controller housing, an HVU high-voltage controller housing, etc. In these housings, the buckle movable part in the buckle structure can be formed as one with one of the cover and the body, for example, by injection molding, and the buckle fixing part can also be formed as one with the other of the cover and the body, for example, by injection molding, so as to achieve simple manufacturing of the housing and its buckle structure.

[0038] In the buckle structure of the utility model, the two elastic claws in the buckle fixing part can not only limit the movement of the buckle movable part relative to the buckle fixing part in the left-right direction or the lateral direction, but also use the hook part of the elastic claw to prevent the buckle fixing part from escaping from the through hole of the buckle movable part in a self-locking manner; at the same time, the bottom surface of the elastic claw and / or the optional middle claw can be used to engage the bottom edge of the through hole to achieve the basic buckling action of the cover on the main body. In general, the buckle structure of the utility model can limit the movement of the buckle movable part relative to the buckle fixing part in the vertical, lateral and perpendicular directions to the vertical and lateral directions, reduce the risk of the BMS controller housing being disengaged when subjected to torsion or other external forces, and improve the assembly firmness and safety of the BMS controller housing.

[0039] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. A buckle structure for a BMS controller housing, the BMS controller housing comprising a body (1) and a cover (2) suitable for being assembled on the body, the buckle structure being characterized in that: The buckle structure comprises a buckle movable portion (3) extending from one of the cover body (2) and the body (1) and having a through hole (31), and a buckle fixing portion (4) extending from the other of the cover body and the body, and is configured to fix the cover body on the body by allowing the buckle fixing portion to pass through the through hole (31) and be buckled to the bottom edge of the through hole. in, The buckle fixing portion (4) comprises two elastic claws (41) with hooks (411) at the ends, and the two elastic claws are configured to pass through the through hole (31) by elastically deforming towards each other, and rebound away from each other so that the respective hooks can be hooked on the two lateral peripheral portions (311) of the through hole respectively.

2. The buckle structure according to claim 1, characterized in that: The buckle fixing portion (4) further comprises an intermediate clamping claw (42) arranged between the two elastic clamping claws (41) and configured to be capable of being clamped to the bottom edge of the through hole (31) via the bottom surface of the intermediate clamping claw.

3. The buckle structure according to claim 1 or 2, characterized in that: The buckle fixing portion (4) is configured to be able to be clamped to the bottom edge of the through hole (31) via the bottom surfaces of the two elastic claws (41).

4. The buckle structure according to claim 3, characterized in that: A guiding inclined surface (5) is provided on the hook portion (411) of the elastic claw (41) and / or the transverse peripheral edge portion (311) of the through hole (31) for facilitating the elastic claw to pass through the through hole.

5. The buckle structure according to claim 3, characterized in that: The buckle movable portion (3) is suspended and extends from one of the cover body (2) and the main body (1), and is configured to avoid the buckle fixing portion by elastic deformation when moving toward the buckle fixing portion (4) and then allow the buckle fixing portion to pass through the through hole (31) by rebounding.

6. The buckle structure according to claim 5, characterized in that: A guiding inclined surface (6) is provided at the bottom end of the buckle movable part (3) and / or the top end of the buckle fixing part (4) for facilitating guiding the buckle movable part to avoid the buckle fixing part.

7. A BMS controller housing, characterized in that The invention comprises a main body (1), a cover (2) suitable for being assembled on the main body, and a snap-fit ​​structure according to any one of claims 1 to 6.

8. The BMS controller housing according to claim 7, characterized in that: The buckle movable part (3) in the buckle structure is formed integrally with one of the cover body (2) and the main body (1) by injection molding, and the buckle fixing part (4) in the buckle structure is formed integrally with the other of the cover body and the main body by injection molding.

9. The BMS controller housing according to claim 7 or 8, characterized in that: The BMS controller housing is in a rectangular shape, and at least one snap-fit ​​structure is provided on each side wall thereof.

10. The BMS controller housing according to claim 7 or 8, characterized in that: The buckle movable part (3) in the buckle structure is arranged on the cover body (2), and the buckle fixing part (4) in the buckle structure is arranged on the main body (1).

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