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 fixed part and a buckle movable part which are arranged on one of the body and the cover body and the other of the body and the cover body respectively. The buckle fixed part comprises a fixed main body part and two protruding parts protruding from the fixed main body part in two opposite protruding directions, and the buckle movable part comprises two protruding pieces which are oppositely arranged and provided with through holes respectively. The buckling structure is configured to enable the two protruding parts to penetrate through the corresponding through holes respectively and be clamped to the bottom edges of the corresponding through holes to achieve a buckling state so as to fix the cover body to the body. In the buckling state, the fixing body part is arranged between the two protruding pieces so as to prevent the two protruding pieces from moving in the two protruding directions in the two directions. According to the double-face buckling type buckle structure, the risk that the buckle structure is disengaged and fails on the whole can be reduced.

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 a 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 arranged on the cover body and having a through hole and a snap-on fixing part arranged on 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 vibration or other external forces (such as vibration generated by a car equipped with a controller during normal driving or impact generated in a collision accident, etc.) or when the snap-on structure produces inherent deformation during the manufacturing process. Utility Model Content

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

[0005] One aspect of the utility model provides a snap-on structure for a BMS controller housing, the BMS controller housing comprising a body and a cover body suitable for being assembled on the body, the snap-on structure comprising a snap-on fixing member arranged on one of the body and the cover body and a snap-on movable member arranged on the other of the body and the cover body. The snap-on fixing member comprises a fixed main body connected to the one of the body and the cover body and two protrusions protruding from the fixed main body along two protruding directions opposite to each other, the snap-on movable member comprises two tabs arranged opposite to each other and respectively having through holes, the snap-on structure is configured to achieve a snap-on state by allowing the two protrusions to pass through the corresponding through holes of the two tabs respectively and snap-on to the bottom edges of the corresponding through holes to fix the cover body on the body. In the snap-on state, the fixed main body is interposed between the two tabs to prevent the two tabs from moving in both directions along the two protruding directions.

[0006] According to an embodiment of the present invention, the two protrusions are respectively arranged at the same positions on the two side surfaces of the fixing body portion.

[0007] According to an embodiment of the present utility model, the buckle movable part further comprises a movable main body portion connected to the other of the main body and the cover body, and the movable main body portion is configured to abut against the fixed main body portion in the buckled state.

[0008] According to one embodiment of the utility model, the fixed main body portion and the movable main body portion are configured to extend along the edges of one of the main body and the cover body and the other, respectively, and both are respectively formed with corner portions at both ends located in the extension direction, and in the buckled state, the corner portion of the fixed main body portion abuts against the corner portion of the movable main body portion.

[0009] According to one embodiment of the utility model, the two protrusions are suspended and extended relative to each other from the two side surfaces of the movable main body, and are configured to avoid the two protrusions by elastically deforming away from each other when moving toward the snap fixing member, and then rebounding towards each other so that the two protrusions pass through the corresponding through holes respectively.

[0010] According to an embodiment of the present utility model, a top end of the protruding portion and / or a bottom end of the tab is provided with a guiding inclined surface for guiding the tab to avoid the protruding portion.

[0011] 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.

[0012] According to one embodiment of the utility model, the snap-on movable part in the snap-on structure is formed integrally with one of the body and the cover by injection molding, and the snap-on fixing part in the snap-on structure is formed integrally with the other of the body and the cover by injection molding.

[0013] According to an embodiment of the present invention, the BMS controller housing is in a rectangular parallelepiped shape, and at least one of the snap-fit ​​structures is provided on at least one side wall thereof.

[0014] 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.

[0015] The buckle fixing member of the buckle structure for the BMS controller housing of the utility model has two protrusions protruding in two opposite protruding directions. The two protrusions are respectively passed through the corresponding through holes in the buckle movable member and are buckled on the bottom edge of the through hole, so as to achieve a buckling state and realize the basic buckling action of the cover body on the main body. On the one hand, the two protrusions of the buckle fixing member are respectively buckled in the two through holes. Even if one of the protrusions is out of the corresponding through hole, the other protrusion is still buckled with the corresponding through hole, so that a double buckling effect is achieved and the reliability of the buckle is improved. On the other hand, in the buckling state, the fixed main body of the buckle fixing member is between the two protrusions of the buckle movable member, which can prevent the two protrusions from moving in both directions along the two opposite protruding directions. According to this double-sided or double-sided buckling configuration, if one of the protrusions has a tendency to be out of the corresponding through hole along one of the protruding directions, then the tendency of the other protrusion to be out of the corresponding through hole along the opposite other protruding direction will inevitably be reduced accordingly, thereby greatly reducing the possibility of both protrusions being out of the corresponding through hole at the same time. The double-sided buckle structure of the utility model can reduce the overall risk of disengagement failure, thereby improving the assembly firmness and safety of the corresponding BMS controller housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 A three-dimensional view of a BMS controller housing with a snap-fit ​​structure according to an embodiment of the utility model is shown.

[0018] Figure 2 yes Figure 1 The schematic diagram of the cover and body of the BMS controller housing shown is in a disassembled state, especially showing the outer side of the snap-fit ​​structure.

[0019] Figure 3 yes Figure 1 A three-dimensional view of the body of the BMS controller housing is shown, particularly showing the inner side of the snap-fit ​​fixings.

[0020] Figure 4 yes Figure 1 A top view of the BMS controller housing is shown.

[0021] Figure 5 yes Figure 4 The cross-sectional view of the BMS controller housing along line AA is shown.

[0022] Figure 6 yes Figure 5 An enlarged view of point B of the BMS controller housing is shown.

[0023] Description of reference numerals:

[0024] 1. Main body; 2. Cover body; 3. Snap-on structure; 4. Snap-on fixing member; 41. Protruding portion; 42. Fixed main body; 43. Bend corner portion; 5. Snap-on movable member; 51. Tab; 511. Through hole; 52. Movable main body; 53. Bend corner portion; 6. Guide slope. DETAILED DESCRIPTION

[0025] 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.

[0026] Figure 1 and Figure 2 The BMS controller housing according to one 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 3 according to the utility model for assembling the cover 2 onto the body 1. The BMS controller housing shown in this embodiment is generally rectangular in shape, with only one side wall (e.g. Figure 1Such a snap structure 3 is provided on the side wall directly facing the side wall seen in the middle, the BMS controller housing is connected to the wiring harness connector via the side wall, and is more susceptible to the force of the wiring harness, which causes the cover body to be disengaged from the body), while the remaining side walls still adopt conventional snap structures, which is conducive to simplifying manufacturing and reducing costs. It can be understood that in other embodiments, for example, when the BMS controller housing is larger or the safety requirements are higher, more than one snap structure 3 can also be selected to be provided on one or more of its side walls. 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 body 2 may include a top wall or an optional lower side wall extending from the periphery of the bottom wall to one side. The cover body 2 is connected and fixed to the body 1 via the snap structure 3 and jointly defines a cavity for accommodating electronic control components, thereby constituting a BMS controller housing having a top wall, a bottom wall and side walls.

[0027] like Figure 1 and Figure 2 As shown, the buckle structure 3 according to this embodiment may include a buckle fixing member 4 arranged on the body 1 and a buckle movable member 5 arranged on the cover 2. The buckle fixing member 4 may include two protrusions 41 protruding in two opposite protruding directions. In the illustrated embodiment, the two protruding directions may be perpendicular to the side wall of the shell where the buckle structure 3 is located and pointing to the outer side of the shell and the inner side of the shell respectively. The buckle movable member 5 may include two tabs 51 arranged opposite to each other. The two tabs 51 respectively have through holes 511 for the corresponding protrusions 41 to pass through. By designing the through holes 511 of the tabs 51 and the positions and sizes of the protrusions 41, each protrusion 41 can be connected to the bottom edge of the through hole 511 after passing through the corresponding through hole 511, thereby achieving the buckling state of the buckle structure 3 to fix the cover 2 to the body 1. The through hole 511 of the tab 51 may be, for example, square as shown in the figure, especially having a straight bottom edge to facilitate a firm snap connection. However, the through hole 511 may also be other suitable shapes that can achieve snap connection. Since the snap-fit ​​fixing part 4 has two protrusions 41, and the two protrusions 51 of the snap-fit ​​movable part 5 have two corresponding through holes 511, the two protrusions 41 are respectively snapped into the two through holes 511. Therefore, even if one of the protrusions escapes from the corresponding through hole, the other protrusion still remains snapped into the corresponding through hole, thus achieving a double snap-fit ​​effect and improving the reliability of the snap-fit.

[0028] In some other embodiments, the locations of the snap-fit ​​movable member 4 and the snap-fit ​​fixing member 5 can be interchanged, that is, the snap-fit ​​movable member 5 is disposed on the body 1 , and the snap-fit ​​fixing member 4 is disposed on the cover 2 .

[0029] For the convenience of description, the directional terms such as "upper", "lower", "top", "bottom", "left", "right" etc. used in this article are always defined based on the positional relationship that the snap-fit ​​movable part 5 is at the top and the snap-fit ​​fixing part 4 is at the bottom. Figure 1 and Figure 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 Figure 2 If the setting positions of the snap fixing part 4 and the snap movable part 5 are interchanged (i.e., the snap movable part 5 is arranged on the main body 1, and the snap fixing part 4 is arranged on the cover body 2), the BMS controller housing shown in the figure should be turned upside down 180 degrees so that the main body 1 and the snap movable part 5 are on the top and the cover body 2 and the snap 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.

[0030] In this embodiment, the snap-fit ​​fixing member 4 also includes a fixed main body portion 42 connected to the body 1. Two protrusions 41 protrude from the fixed main body portion 42 to the outside and inside of the shell side wall respectively, and are thus arranged on the body 1 with the help of the fixed main body portion 42. The fixed main body portion 42 can be connected to the body 1 in various ways. For example, the fixed main body portion 42 can be fixed to the body 1 by means of bonding or fastener connection, or formed integrally with the body 1 on the body 1. For example, in the illustrated embodiment, the fixed main body portion 42 is formed integrally with the side wall of the body 1 and is higher than the side wall, which is conducive to forming a gap between the side wall of the body 1 and the cover 2 for the passage of a wiring harness, etc. Of course, the fixed main body portion 42 can also be a part of the side wall of the body 1 itself.

[0031] The fixed body portion 42 extends along the edge or side wall of the body 1, thereby having two side surfaces facing the inner side and the outer side of the housing or the body 1, respectively. Two protrusions 41 protruding from the fixed body portion 42 in two opposite protruding directions (directions pointing to the inner side of the housing and directions pointing to the outer side of the housing) are respectively arranged at the same positions on the two side surfaces of the fixed body portion 42. In other embodiments, the two protrusions 41 may also be arranged at different positions on the two side surfaces.

[0032] As described above, when the two protrusions 41 pass through the corresponding through holes 511 of the two protrusions 51 and are engaged with the bottom edges of the corresponding through holes, the buckle structure 3 reaches its buckled state. Figure 5 and 6 As shown, the fixed body portion 42 will be between the two protrusions 51. Thus, the fixed body portion 42 can prevent the two protrusions 51 from moving in the protruding directions of the two protrusions 41 (i.e., the direction pointing to the inside of the housing and the direction pointing to the outside of the housing, i.e., Figure 5 and 6 Therefore, if one of the protrusions 41 tends to come out of the corresponding through hole 511 along one of the protruding directions due to the vibration of the housing, etc., the tendency of the other protrusion 41 on the back side to come out of the corresponding through hole 511 along the opposite protruding direction will inevitably be reduced. The double-sided or double-sided buckling configuration implemented by the buckle structure 3 on the two side surfaces of the fixed main body 42 can greatly reduce the possibility of both protrusions 41 coming out of the corresponding through holes at the same time.

[0033] The snap-fit ​​movable part 5 may include a movable main body 52 connected to the cover body 2 in addition to the tabs 51, and the two tabs 51 may be arranged on the cover body 2 by means of the movable main body 52. ​​The movable main body 52 may also be connected to the cover body 2 in various ways, for example, the movable main body 52 may be fixed to the cover body 2 by means of bonding or fastener connection, or may be formed integrally with the cover body 2 on the cover body 2. In the case where the cover body 2 has a side wall, the movable main body 52 may also be a part of the side wall of the cover body 2 itself. In the illustrated embodiment, the movable main body 52 may extend along the edge or side wall of the cover body 2 and hang downward, thereby having two side surfaces facing the inner side and the outer side of the housing or the cover body 2, respectively.

[0034] According to one embodiment, Figure 5 and 6 As shown, each tab 51 may include a fixed section and a free section, wherein the fixed section of one tab 51 extends from the movable main body 52 toward the outside of the cover body 2, and the fixed section of the other tab 51 extends from the movable main body 52 toward the inside of the cover body 2, and the free sections of the two tabs 51 extend from one end of the respective fixed sections away from the movable main body 52 along the assembly direction of the cover body 2 (i.e. Figure 5 and 6 The two tabs 51 are configured to extend in a downward direction from the two side surfaces of the movable main body 52, that is, the two tabs 51 are configured to be suspended and extended relative to each other. In addition, the two tabs 51 can be configured to avoid the two protrusions 41 of the snap fastener 4 by elastically deforming away from each other when moving toward the snap fastener 4 along the assembly direction. That is, referring to Figure 6 The left tab 51 can move downward toward the buckle fixing member 4. Figure 6 The left side (that is, the inner side of the shell) of the buckle fixing member 4 undergoes elastic deformation (for example, such elastic deformation can be induced by contact with the protrusion 41 of the buckle fixing member 4 located on the inner side of the shell) to avoid the protrusion 41 located on the inner side of the shell. At the same time, the protrusion 51 on the right side can be moved to Figure 6The right side (that is, the outer side of the shell) of the two tabs 51 is elastically deformed (for example, the elastic deformation can be induced by contact with the protrusion 41 of the buckle fixing member 4 located on the outer side of the shell) to avoid the protrusion 41 located on the outer side of the shell. Next, after the bottom edges of the through holes 511 of the two tabs 51 pass over the corresponding protrusions 41, the two tabs 51 can rebound close to each other so that the two protrusions 41 pass through the corresponding through holes 511 respectively, and the bottom surfaces of the two protrusions 41 are snapped on the bottom edges of the corresponding through holes 511.

[0035] It should be noted that the tab 51 is not limited to the above-mentioned configuration of overhanging extension and elastic deformation. For example, the tab 51 can also be hinged on the cover 2 at its upper end, and the protrusion 41 is clamped into the through hole 511 of the tab 51 by pivoting around the hinge.

[0036] In order to facilitate guiding each protrusion 51 to avoid the protrusion 41 during the downward movement, a guide slope 6 which is gradually inclined away from the fixed main body 42 in the downward direction may be provided at the top end of each protrusion 41 (see Figure 3 The protrusion 41 and Figure 6 The protrusion 41 shown in the figure). Under the action of the guiding slope 6, the tab 51 can be more smoothly elastically deformed in the direction away from the movable main body 52 and avoid the corresponding protrusion 41 during the process of moving toward the buckle fixing member 4. As a replacement or additional structure of the guiding slope 6 arranged at the top of the protrusion 41, a correspondingly inclined guiding slope can also be arranged at the bottom of the tab 51, so that under the cooperation of the guiding slope and the aforementioned guiding slope 6, the cover 2 can be assembled to the body 1 more conveniently and labor-savingly.

[0037] When the cover 2 is assembled to the body 1, in order to limit the upper and lower positions of the body 1 and the cover 2, in the buckled state, on the one hand, the bottom surfaces of the two protrusions 41 can be snapped onto the bottom edges of the corresponding through holes 511, thereby preventing the tabs 51 and the cover 2 from moving upward after the buckling, and on the other hand, the movable main body 52 can abut against the fixed main body 42, thereby preventing the cover 2 from continuing to move downward after being buckled onto the body 1. In one embodiment, as Figure 2 As shown, the fixed main body 42 is formed with angled portions 43 at both ends thereof in the direction in which it extends along the edge of the main body 1, and the movable main body 52 is also formed with angled portions 53 corresponding to the angled portions 43 at both ends thereof in the direction in which it extends along the edge of the cover 2. In the buckled state, the cover 2 can be prevented from continuing to move downward after being buckled with the main body 1 at least by the abutment between the top surface of the angled portion 43 and the bottom surface of the angled portion 53. The fixed main body 42 and the movable main body 52 have high compressive strength at the angled portions 43 and the angled portions 53, respectively, and can achieve more reliable abutment.

[0038] The utility model also provides a BMS controller housing having the above-mentioned buckle structure 3, 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 member 5 in the buckle structure can be formed into one piece with one of the body 1 and the cover 2, for example, by injection molding, and the buckle fixing member 4 can also be formed into one piece with the other of the body 1 and the cover 2, for example, by injection molding, thereby achieving simple manufacturing of the BMS controller housing and its buckle structure.

[0039] As described above, the double-sided buckle structure of the present invention can reduce the overall risk of disengagement failure, thereby improving the assembly firmness and safety of the corresponding BMS controller housing.

[0040] 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 (3) for a BMS controller housing, the BMS controller housing comprising a body (1) and a cover (2) suitable for being assembled on the body (1), the buckle structure being characterized in that: The buckle structure comprises a buckle fixing member (4) arranged on one of the body (1) and the cover (2) and a buckle movable member (5) arranged on the other of the body and the cover. The buckle fixing member (4) comprises a fixing main body portion (42) connected to said one of the main body and the cover body and two protrusions (41) protruding from the fixing main body portion in two protrusion directions opposite to each other; the buckle movable member (5) comprises two protrusions (51) arranged opposite to each other and respectively having through holes (511); the buckle structure is configured to achieve a buckling state by allowing the two protrusions (41) to pass through the corresponding through holes (511) of the two protrusions respectively and to be buckled to the bottom edges of the corresponding through holes so as to fix the cover body (2) on the main body (1); in, In the buckled state, the fixed main body (42) is located between the two protruding pieces to prevent the two protruding pieces from moving in both directions along the two protruding directions.

2. The buckle structure (3) according to claim 1, characterized in that: The two protrusions (41) are respectively arranged at the same positions on two side surfaces of the fixing body portion.

3. The buckle structure (3) according to claim 2, characterized in that: The buckle movable part (5) further comprises a movable main body portion (52) connected to the other of the main body (1) and the cover body (2), and the movable main body portion is configured to be able to abut against the fixed main body portion (42) in the buckled state.

4. The buckle structure (3) according to claim 3, characterized in that: The fixed main body portion (42) and the movable main body portion (52) are configured to extend along the edges of one of the main body (1) and the cover body (2), respectively, and both have curved corners formed at both ends in the extension direction. In the buckled state, the curved corner (43) of the fixed main body portion (42) abuts against the curved corner (53) of the movable main body portion (52).

5. The buckle structure (3) according to claim 4, characterized in that: The two tabs (51) are suspended and extended from the two side surfaces of the movable main body (52) relative to each other, and are configured to avoid the two protrusions (41) by elastically deforming away from each other when moving toward the snap-fit ​​fixing member (4), and then rebounding towards each other so that the two protrusions pass through the corresponding through holes respectively.

6. The buckle structure (3) according to claim 5, characterized in that: The top end of the protruding portion (41) and / or the bottom end of the tab (51) are provided with a guiding inclined surface (6) for facilitating guiding the tab to avoid the protruding portion.

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 (3) according to any one of claims 1 to 6.

8. The BMS controller housing according to claim 7, characterized in that: The snap-fit ​​movable part (5) in the snap-fit ​​structure (3) is formed integrally with one of the main body (1) and the cover body (2) by injection molding, and the snap-fit ​​fixing part (4) in the snap-fit ​​structure (3) is formed integrally with the other of the main body and the cover body by injection molding.

9. The BMS controller housing according to claim 7 or 8, characterized in that: The BMS controller housing is in the shape of a rectangular parallelepiped, and at least one of the snap-fit ​​structures (3) is provided on at least one side wall thereof.

10. The BMS controller housing according to claim 7 or 8, characterized in that: The buckle movable part (5) in the buckle structure (3) is arranged on the cover body (2), and the buckle fixing part (4) in the buckle structure (3) is arranged on the main body (1).

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