CN222509707U

CN222509707U - Buckle structure for BMS controller housing and BMS controller housing

Info

Publication number: CN222509707U
Application number: CN202421089997.8U
Authority: CN
Inventors: 王炳壮
Original assignee: Vitesco Automotive Changchun Co Ltd
Current assignee: Vitesco Automotive Changchun Co Ltd
Priority date: 2024-05-17
Filing date: 2024-05-17
Publication date: 2025-02-18
Anticipated expiration: 2034-05-17

Abstract

The utility model relates to a buckle structure for a BMS controller housing and 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 snapping on 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. The buckle structure of the utility model can reduce the risk of disengagement when the BMS controller housing is subjected to torsion or other external forces.

Description

Buckle structure for BMS controller housing and BMS controller housing

Technical Field

The present utility model relates to the field of Battery MANAGEMENT SYSTEM (hereinafter, abbreviated as "BMS") technology, and more particularly, to a snap-in structure employed by a housing of various controllers in a BMS, and a BMS controller housing including the same.

Background

With the development of the international new energy industry, development of new energy automobiles, particularly electric automobiles using power batteries as driving sources, is continuously advancing. The Battery Management System (BMS) is a core component of the electric automobile, and is mainly used for intelligently managing and maintaining each battery unit of the power battery, preventing the battery from being overcharged and overdischarged, prolonging the service life of the battery, monitoring the state of the battery and the like. To achieve these effects, the BMS includes various controllers such as a BMU master controller, a CSC slave controller, an HVU high voltage controller, etc., which are mainly composed of electronic control components contained in a housing.

The BMS controller housing generally includes a body and a cover adapted to be assembled to the body, the cover and the body, when assembled together, defining an interior cavity for receiving the control components. In order to provide good protection for the contained control components, it is required that the cover be securely fitted to the body. The known housing fixes the cover body to the body by means of a snap-in structure provided at the outer side thereof, which comprises a snap-in movable part extending from the cover body and having a through hole and a snap-in fixing part extending from the body, the cover body being fixed to the body by passing the snap-in fixing part through the through hole of the snap-in movable part and being snap-fitted to the through hole. However, it has been found that such a snap structure is easily disengaged when the BMS controller housing is subjected to torsion or other external force such as impact generated when a car having the controller mounted thereon is involved in a collision accident or vibration generated during normal running, etc.

Disclosure of utility model

The present utility model is directed to solving at least one of the problems discussed above and/or other disadvantages of the prior art.

The inventor has made intensive studies to find that, in the above-described known housing snap structure, the snap fixing portion is constituted by only a single claw which, after passing through the through hole in the snap movable portion, generates a snap fit substantially only at the bottom edge of the through hole, so that only the movement of the snap movable portion in the up-down direction or the vertical direction can be restricted, but the claw does not form any snap fit with the through hole in the left-right direction or the lateral direction, which results in easy disengagement of the single claw when the housing is subjected to torsion or other external force. Based on the above findings, the present utility model contemplates the following technical solutions to solve the related technical problems.

One aspect of the present utility model provides a snap structure for a BMS controller housing including a body and a cover adapted to be assembled on the body, the snap structure including a snap movable part protruding from one of the cover and the body and having a through hole, and a snap fixing part protruding from the other of the cover and the body, and configured to fix the cover on the body by passing the snap fixing part through the through hole and snap-coupling a bottom edge of the through hole. The snap fixing portion includes two elastic claws with hooks at ends, which are configured to pass through the through-hole by being elastically deformed close to each other and rebound away from each other so that the respective hooks can be hooked to both lateral peripheral portions of the through-hole, respectively.

According to an embodiment of the present utility model, the snap fixing portion further includes an intermediate claw disposed between the two elastic claws, and is configured to be capable of being snapped to a bottom edge of the through hole via a bottom surface of the intermediate claw.

According to an embodiment of the present utility model, the fastening portion is configured to be capable of being fastened to a bottom edge of the through hole via bottom surfaces of the two elastic claws.

According to an embodiment of the present utility model, a guide slope for facilitating guiding the elastic claw through the through hole is provided on the hook portion of the elastic claw and/or the lateral peripheral edge portion of the through hole.

According to an embodiment of the present utility model, the snap-fit movable portion is suspended from the one of the cover and the body, and is configured to be able to escape the snap-fit fixed portion by being elastically deformed when moving toward the snap-fit fixed portion and then to pass the snap-fit fixed portion through the through hole by being rebounded.

According to one embodiment of the present utility model, a guiding inclined plane is provided at the bottom end of the movable portion and/or the top end of the fixed portion, so as to guide the movable portion to avoid the fixed portion.

Another aspect of the present utility model provides a BMS controller housing including a body, a cover adapted to be fitted on the body, and a snap structure according to any one of the above.

According to an embodiment of the present utility model, the snap-fit movable portion in the snap-fit structure is formed integrally with one of the cover and the body by injection molding, and the snap-fit fixed portion in the snap-fit structure is formed integrally with the other of the cover and the body by injection molding.

According to an embodiment of the present utility model, the BMS controller case has a rectangular parallelepiped shape, and at least one of the snap structures is provided on each side wall thereof.

According to an embodiment of the present utility model, the fastening movable portion in the fastening structure is disposed on the cover, and the fastening fixing portion in the fastening structure is disposed on the body.

The snap fixing part in the snap structure for the BMS controller housing of the present utility model has at least two elastic claws with hooks, which can pass through the through holes of the snap moving part by elastically deforming the two elastic claws toward each other, and then can be hooked to the corresponding two lateral peripheral parts of the through holes after the two elastic claws rebound away from each other. The two elastic claws can limit the movement of the buckle movable part relative to the buckle fixed part in the left-right direction or the transverse direction, and can prevent the buckle fixed part from falling out of the through hole of the buckle movable part by utilizing the hook part, so that the self-locking function is realized. In addition, the bottom surfaces of the elastic clamping jaws and/or the optional middle clamping jaws are clamped with the bottom edges of the through holes, so that the basic buckling action of the cover body on the body is realized. The buckle structure can limit the movement of the buckle movable part relative to the buckle fixed part in the vertical direction, the transverse direction and the directions perpendicular to the vertical direction and the transverse direction, so that the risk of disengaging the buckle structure when the BMS controller shell is subjected to torsion or other external forces is reduced, and the assembly firmness and the safety of the BMS controller shell are improved.

Drawings

The features and advantages of the present utility model will be apparent from the detailed description provided hereinafter with reference to the accompanying drawings. It is to be understood that the following drawings are merely schematic and are not necessarily drawn to scale, and are not to be construed as limiting the utility model, in which:

fig. 1 is a perspective view of a BMS controller case having a snap structure according to an embodiment of the present utility model.

Fig. 2 is a schematic view of the BMS controller case of fig. 1 in an exploded state of the cover and the body, particularly illustrating the outer side of the snap structure.

Fig. 3 is a schematic view of the BMS controller case shown in fig. 1, taken along one of the elastic claws of the snap fastening part.

Fig. 4 is a perspective view showing an inner side surface of a snap moving portion of the snap structure in fig. 1.

Reference numerals illustrate:

1. the device comprises a body, a cover body, a fastening movable part, a through hole, a 311, a transverse peripheral part, a fastening fixed part, 41, an elastic claw, 411, a hook part, 42, a middle claw, 5, a guide inclined plane and 6, and a guide inclined plane.

Detailed Description

Embodiments of the present utility model are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding and enabling description of the utility model to one skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Furthermore, it should be understood that the utility model is not limited to specific described embodiments. Rather, any combination of the features and elements described below is contemplated to implement the utility model, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly set out in a claim.

Fig. 1 and 2 illustrate a BMS controller housing according to an embodiment of the present utility model. The BMS controller case may include a body 1, a cover 2, and at least one snap structure according to the present utility model for assembling the cover 2 to the body 1. The BMS controller housing shown in this embodiment is generally rectangular in shape and is provided with one such snap structure on each side wall thereof. It will be appreciated that in other embodiments, such as when the BMS controller housing is large, more than two snap features may be provided on each side wall thereof. However, for example, when the BMS controller housing is small and is not easily twisted, only one of the side walls or a portion thereof may be provided with a snap structure according to the present utility model, and the remaining side walls may still be provided with a conventional snap structure, which is advantageous in terms of simplified manufacturing and reduced costs. The body 1 may include a bottom wall and a higher side wall extending to one side from the periphery of the bottom wall, and the cover 2 may include a top wall or an optional lower side wall, and the cover 2 is fixedly connected to the body 1 via a snap-fit structure and collectively defines a cavity for accommodating electronic control components, whereby a BMS controller housing having the top wall, the bottom wall, and the side walls may be constructed.

As shown in fig. 1 and 2, the snap structure according to this embodiment may include a snap movable portion 3 and a snap fixed portion 4. The snap-action part 3 protrudes from the cover 2 and has a through hole 31, and the snap-action fixing part 4 protrudes from the body 1 and can pass through the through hole 31. Through the design of the through hole 31 of the buckle movable part 3 and the position and the size of the buckle fixing part 4, the buckle fixing part 4 can be clamped at the bottom edge of the through hole 31 after passing through the through hole 31, so that the cover body 2 is fixed on the body 1. In other embodiments, if the cover 2 has a certain thickness or the cover 2 also has a higher side wall, the setting positions of the snap-action part 3 and the snap-action fixing part 4 may be interchanged, i.e. the snap-action part 3 is set on the body 1 and the snap-action fixing part 4 is set on the cover 2.

For convenience of description, directional terms such as "upper", "lower", "top", "bottom", "left", "right", "vertical", "lateral", and the like are used herein to be defined always based on a positional relationship in which the snap movable portion 3 is above and the snap fixed portion 4 is below. For the embodiment shown in fig. 1 and 2, this definition is exactly in line with the positional relationship shown in the figures, and the orientation or position of the relevant components, parts or features may be described directly in terms of the orientation shown. However, if the arrangement positions of the snap-action part 3 and the snap-action part 4 are interchanged in fig. 1 and 2 (i.e. the snap-action part 3 is arranged on the body 1 and the snap-action part 4 is arranged on the cover 2), the illustrated housing should be flipped up and down 180 degrees so that the body 1 and the snap-action part 3 are up and the cover 2 and the snap-action part 4 are down, and then the directions or positions of the relevant parts, parts or features are described again in accordance with the illustrated orientation.

According to one embodiment, as shown in fig. 1 and 2, the snap-action part 3 may comprise a fixed section and a free section, wherein the fixed section extends from the cover 2 towards the outside facing away from the cover 2, while the free section extends from the end of the fixed section facing away from the cover 2 in the assembly direction of the cover 2 (downward direction in fig. 1 and 2), i.e. the snap-action part 3 is configured to depend from the cover 2. Further, the click movable portion 3 may be configured to be able to escape the click fixed portion 4 by being elastically deformed when moving toward the click fixed portion 4 in the fitting direction, for example. That is, taking the leftmost snap-action portion 3 shown in fig. 2 as an example, it is possible to elastically deform to the left in fig. 2 (also to the outside of the snap-action portion 3) when moving downward toward the snap-action fixing portion 4 (for example, such elastic deformation can be induced by abutting against the snap-action fixing portion 4) to avoid the snap-action fixing portion 4. Next, after the bottom edge of the through hole 31 of the movable buckle part 3 passes over the fixed buckle part 4, the movable buckle part 3 can rebound to make the fixed buckle part 4 pass through the through hole 31, and the bottom surface of the fixed buckle part 4 is clamped on the bottom edge of the through hole 31.

In order to facilitate guiding the snap action part 3 to avoid the snap fixation part 4 during downward movement, a guiding slope 6 (see snap action part shown at the rightmost side in fig. 2 and snap action part 3 shown in fig. 4) gradually inclined to the outside in a downward direction may be provided at the bottom end of the snap action part 3, and/or a guiding slope 6 (see snap fixation part shown at the rightmost side in fig. 2) correspondingly inclined may be provided at the top end of the snap fixation part 4. Under the action of these guide inclined planes 6, the snap-in movable portion 3 can elastically deform to the outside more smoothly and avoid the snap-in fixed portion 4 in the process of moving toward the snap-in fixed portion 4, so that the cover 2 can be assembled on the body 1 conveniently and laborsaving.

It should be noted that the snap-action portion 3 is not limited to the above-described overhanging extended and elastically deformable configuration. For example, the snap-fit movable portion 3 may be hinged to the lid 2 at its upper end, and the snap-fit fixed portion 4 may be snapped into the through hole 31 of the snap-fit movable portion 3 by pivoting around the hinge.

In fig. 2, taking the centrally illustrated snap structure as an example, the snap movable portion 3 is located above the snap fixed portion 4, the up-down direction may also be referred to as vertical direction, and the left-right direction may also be referred to as lateral direction, and the snap movable portion 3 has two lateral peripheral portions (i.e., peripheral portions located in the left-right direction) 311 on the left and right sides of the through hole 31 thereof, which may also be referred to herein simply as two lateral peripheral portions of the through hole. The through hole 31 of the snap-action part 3 may for example be square as shown, in particular with a flat bottom edge in order to achieve a firm snap-action. However, the through hole 31 may be of other suitable shape for enabling the engagement.

According to one embodiment, as shown in fig. 1 and 2, the snap-fastening portion 4 may comprise two elastic jaws 41 arranged at intervals and both protruding from the body 1. The extremity of each resilient jaw 41 (i.e. the end facing away from the body 1) has a hook 411 on its side facing away from the other resilient jaw 41. When the two elastic claws 41 are elastically deformed to come close to each other, their respective hook portions 411 can avoid the two lateral 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 to enable the two hook portions 411 to be hooked to the two lateral peripheral portions 311, respectively. In this way, the two elastic claws 41 can restrict the movement of the movable buckle part 3 in the left-right direction or the transverse direction relative to the fixed buckle part 4, and can prevent the fixed buckle part 4 from falling out of the through hole 31 of the movable buckle part 3 by the hook 411, thereby realizing the self-locking function. According to this configuration, the elastic claw or the click fixing portion may be disengaged from the through hole of the click moving portion only when the two elastic claws 41 are elastically deformed again close to each other by an external force.

In order to limit the body 1 and the cover 2 in the up-down direction, referring to fig. 1 and 3, the bottom surfaces of the two elastic claws 41 may be engaged with the bottom edge of the through hole 31, thereby preventing the snap movable portion 3 from moving upward after being snapped by the elastic claws 41. Accordingly, after the cover 2 is assembled to the body 1, the periphery of the cover 2 may abut against the side wall of the body 1, thereby restricting the snap-in movable portion 3 from moving downward after being snapped in.

Alternatively, the snap-fit fixing portion 4 may further include an intermediate claw 42 provided between the two elastic claws 41, as shown in fig. 1 and 2. Like the bottom surfaces of the two elastic claws 41, the bottom surface of the middle claw 42 can also be clamped at the bottom edge of the through hole 31, so that the strength of the fastening fixing part 4 is increased by the middle claw 42, and the fastening movable part 3 can be more firmly prevented from moving upwards after fastening. It will be appreciated that of the two resilient jaws 41 and the intermediate jaw 42, it is also possible that only the bottom surface of the intermediate jaw 42 is clamped to the bottom edge of the through hole 31, whereas the bottom surfaces of the two resilient jaws 41 are not clamped to the bottom edge of the through hole, in which case only the intermediate jaw 42 is used for vertical limiting, whereas the two resilient jaws 41 are used for limiting both in the transverse direction and in the direction perpendicular to both the vertical and the transverse direction (i.e. the direction perpendicular to the paper surface of fig. 2).

Since the two elastic claws 41 and the middle claw 42 are spaced apart, the guide inclined surfaces 6 formed at the buckle fixing portion 4 are formed at the top ends of the two elastic claws 41 and the middle claw 42 so as to jointly play a role in guiding the buckle movable portion 3.

Elastic deformation occurs during the passage of the two elastic claws 41 through the through-hole 31, and in order to better guide the elastic claws 41 to deform so that their hooks 411 can escape from the lateral peripheral edge portions 311 of the through-hole 31, guide slopes 5 may be provided at the hooks 411 of the elastic claws 41 or the lateral peripheral edge portions 311 of the through-hole 31, as shown in fig. 2 and 4. Of course, in order to further improve the guiding effect, the hook 411 and the lateral peripheral edge 311 may be provided with the guiding slope 5. The provision of the guide inclined surface 5 is also advantageous in that the cover 2 can be assembled to the body 1 with ease and effort.

The utility model also provides a BMS controller housing with the buckle structure, which comprises but is not limited to a BMU master controller housing, a CSC slave controller housing, an HVU high-voltage controller housing and the like. In these cases, the snap-in movable part of the snap-in structure may be formed integrally with one of the cover and the body, for example by injection molding, while the snap-in fixed part may also be formed integrally with the other of the cover and the body, for example by injection molding, thereby enabling easy manufacture of the case and its snap-in structure.

In the buckle structure, 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 transverse direction, but also prevent the buckle fixing part from being separated from the through hole of the buckle movable part in a self-locking way by utilizing the hook parts of the elastic claws, and meanwhile, the bottom surfaces of the elastic claws and/or the optional middle claws are clamped with the bottom edge of the through hole, so that the basic buckling action of the cover body on the body is realized. In general, the buckle structure of the utility model can limit the movement of the buckle movable part relative to the buckle fixed part in the vertical direction, the transverse direction and the directions perpendicular to the vertical direction and the transverse direction, thereby reducing the risk of disengagement of the BMS controller shell when the BMS controller shell is subjected to torsion or other external forces and improving the assembly firmness and the safety of the BMS controller shell.

It will be apparent to those skilled in the art that various modifications and variations can 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 consideration of the specification and practice of the utility model disclosed herein. It is intended that the specification and examples disclosed herein be considered as exemplary only, with a true scope of the utility model being indicated by the following claims and their equivalents.

Claims

1. A snap-in structure for a BMS controller housing comprising a body (1) and a cover (2) adapted to be assembled on the body, characterized in that:

The snap structure comprises a snap movable part (3) extending from one of the cover body (2) and the body (1) and provided with a through hole (31), and a snap fixed part (4) extending from the other of the cover body and the body, and is configured to fix the cover body on the body by enabling the snap fixed part to pass through the through hole (31) and be clamped at the bottom edge of the through hole,

Wherein the snap fastening portion (4) comprises two elastic claws (41) with hooks (411) at their ends, which are configured to pass through the through hole (31) by being elastically deformed close to each other and to spring back away from each other so that the respective hooks can be hooked to the two lateral peripheral portions (311) of the through hole, respectively.

2. The snap structure according to claim 1, characterized in that the snap fixing portion (4) further comprises an intermediate jaw (42) arranged between the two elastic jaws (41) and configured to be snap-engageable to a bottom edge of the through hole (31) via a bottom surface of the intermediate jaw.

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

4. A snap-in structure according to claim 3, characterized in that a guiding bevel (5) is provided on the hook (411) of the resilient claw (41) and/or the lateral peripheral edge (311) of the through hole (31) for facilitating guiding the resilient claw through the through hole.

5. A snap structure according to claim 3, characterized in that the snap movement part (3) depends from said one of the cover (2) and the body (1) and is configured to avoid the snap fixation part by being elastically deformed and then to pass the snap fixation part through the through hole (31) by springing back when moving towards the snap fixation part (4).

6. The fastening structure according to claim 5, characterized in that a guiding inclined plane (6) for guiding the fastening movable part to avoid the fastening fixed part is provided at the bottom end of the fastening movable part (3) and/or the top end of the fastening fixed part (4).

7. BMS controller housing characterized by comprising a body (1), a cover (2) adapted to be fitted on said body and a snap-in structure according to any of claims 1 to 6.

8. The BMS controller housing according to claim 7, wherein the snap-action part (3) of the snap-action structure is formed integrally with one of the cover (2) and the body (1) by injection molding, and the snap-action fixing part (4) of the snap-action structure is formed integrally with the other of the cover and the body by injection molding.

9. The BMS controller housing according to claim 7 or 8, wherein said BMS controller housing has a rectangular parallelepiped shape and is provided with at least one said snap structure on each side wall thereof.

10. BMS controller housing according to claim 7 or 8, characterized in that a snap-action part (3) in the snap-action structure is provided on the cover (2), and a snap-action fixing part (4) in the snap-action structure is provided on the body (1).