Shell device

Abstract

The utility model provides a shell device, which is used for installing a power distribution unit and comprises a shell body, an in-shell support and a connecting support. Wherein an accommodating space for accommodating the power distribution unit is formed in the shell body; the in-shell bracket is arranged in the accommodating space and is used for mounting at least one part of elements of the battery management system so as to integrate the battery management system and the power supply distribution unit on the shell body; the connecting bracket is connected with the shell body and the in-shell bracket, so that the in-shell bracket is fixed on the shell body; and the connecting bracket is detachably and fixedly connected with the in-shell bracket. The bracket for mounting the BMS is divided into the in-shell bracket and the connecting bracket which are connected with each other, the connecting part between the in-shell bracket and the connecting bracket can be used for enhancing the structural strength, and compared with the scheme that the BMS is directly mounted after the bracket is directly and integrally welded, the vibration amplitude can be reduced when vibration is received, so that a welding seam is not easy to break, and the welding quality is improved. The technical problem that a support for installing a BMS is prone to breakage is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a shell device. BACKGROUND

[0002] In the related art, the power distribution unit (PDU) for distributing power of the power battery on the vehicle is often integrated in a box, and the battery management system (BMS) is also suspended and installed in the box by using a welded support to improve the spatial integration of the box. However, in the use process, the support will be broken due to the severe vibration of the vehicle caused by road bumps and the like, causing the components of the PDU and BMS integrated in the box to be damaged, and in severe cases, even causing the power battery to burn. SUMMARY

[0003] The embodiment of the utility model provides a kind of shell device, can improve the technical problem that the mounting support integrated in the shell of installing power distribution unit is easily broken when being vibrated.

[0004] In the first aspect, the embodiment of the utility model provides a kind of shell device, for installing power distribution unit, comprising:

[0005] Shell body, is formed with the accommodation space of accommodating power distribution unit;

[0006] Shell inner support, is set in accommodation space, for installing at least one part of the element of battery management system to make battery management system and power distribution unit integrated on shell body;

[0007] Connecting support, connects shell body and shell inner support to make shell inner support fixed on shell body;

[0008] Wherein, connecting support and shell inner support constitute detachable fixed connection.

[0009] In an embodiment, connecting support includes:

[0010] First connecting part, with the inner wall of the accommodation space of shell body constitutes mechanical connection;

[0011] Second connecting part, is equipped with connecting hole, and second connecting part constitutes screw thread connection with shell inner support at connecting hole;

[0012] Wherein, second connecting part is set out from first connecting part along first extension direction.

[0013] In an embodiment, second connecting part is spaced apart and provided with a plurality of connecting holes along the second extension direction.

[0014] In an embodiment, in the second extension direction, the ratio of the interval between two adjacent connecting holes to the length of the second connecting part is in the range of 0.25 to 0.45.

[0015] In an embodiment, in the second extension direction, the interval between one connecting hole and the other two adjacent connecting holes is different.

[0016] In an embodiment, the second extension direction is perpendicular to the first extension direction.

[0017] In an embodiment, the ratio of the length of the inner shell support along the first extension direction to the length of the second connecting part along the second extension direction is in the range of 0.25 to 0.35.

[0018] In an embodiment, the first connecting part is welded to the shell body.

[0019] In an embodiment, the two ends of the inner shell support along the first extension direction are connected to the second connecting parts of different connecting supports, respectively.

[0020] In an embodiment, in the first extension direction, at least one connecting hole on the connecting support at one end of the inner shell support is arranged in a staggered manner with at least one connecting hole on the connecting support at the other end of the inner shell support.

[0021] The beneficial effects of the embodiments of the present application are as follows:

[0022] In the embodiments of the present application, the support for installing the BMS is divided into the inner shell support and the connecting support which are connected to each other, the inner shell support mainly serves to support the installation of the BMS, and the connecting support mainly connects the inner shell support to the shell body. Since the inner shell support and the connecting support are detachably fixedly connected, a buffer can be arranged between the inner shell support and the connecting support according to actual needs, or the inner shell support and the connecting support can be connected in a fixed form such as bolt connection, the connecting part between the inner shell support and the connecting support can be used to enhance the structural strength, compared with the scheme that the support is directly integrally welded on the inner wall of the accommodating space and then the BMS is directly installed, the vibration amplitude can be reduced when receiving the vibration, so that the weld is not easy to break, thereby improving the technical problem that the support for installing the BMS is easy to break. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0024] Figure 1is a kind of shell device's perspective schematic view provided by the embodiment of the utility model;

[0025] Figure 2 is Figure 1 Partial close-up view of part A in Figure 1;

[0026] Figure 3 is a kind of shell device's perspective schematic view provided by the embodiment of the utility model;

[0027] Figure 4 is Figure 3 Partial close-up view of part B in Figure 1;

[0028] Figure 5 is Figure 4 Structure diagram of connecting support in Figure 1.

[0029] Mark explanation:

[0030] 100, shell device;

[0031] 110, shell body;110a, accommodating space;

[0032] 120, shell inner support;121, mounting portion;

[0033] 130, connecting support;131, first connecting portion;132, second connecting portion;132a, connecting hole;133, intermediate bending portion;

[0034] X1, first extension direction;X2, second extension direction. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, the orientation words such as "upper" and "lower" are generally used to indicate the upper and lower of the device in actual use or working state, and the specific direction of the drawing in the drawing. And "inner" and "outer" are relative to the outline of the device.

[0036] Refer to Figures 1 to 5As shown, some embodiments of the utility model provide a kind of shell device 100, the shell device 100 is used to install power distribution unit (namely the PDU mentioned above), as specific description, the power distribution unit can be integrated on vehicle, and with the power battery of vehicle constitutes electric connection, to be used to distribute the electric energy provided by power battery to each electric equipment of vehicle.The shell device 100 includes: shell body 110, shell inner support 120 and connecting support 130.

[0037] Wherein, shell body 110 is formed with accommodating space 110a for accommodating power distribution unit, so that at least a part of power distribution unit is installed inside shell body 110.

[0038] Shell inner support 120 is arranged in accommodating space 110a, for installing at least one part of the element of battery management system to make battery management system and power distribution unit integrated on shell body 110, the battery management system (namely the BMS mentioned above) is electrically connected with power battery, and at least for monitoring output current and other use parameters of power battery.Connecting support 130 connects shell body 110 and shell inner support 120 to make shell inner support 120 fixed on shell body 110, as specific scheme, shell inner support 120 is used to support installation battery management system, and the installation part of the shell inner support 120 for supporting installation battery management system is arranged at the interval with the inner wall of accommodating space 110a of shell body 110, equivalent to making battery management system be able to suspend on shell body 110, to strengthen heat dissipation by the interval between installation part and shell body 110, ensure that power distribution unit and battery management system work stably.Further scheme, hollow region can be formed on installation part, so that shell inner support 120 is lightened while further strengthening heat dissipation.

[0039] In the shell device 100 provided by the utility model, connecting support 130 and shell inner support 120 constitute detachable fixed connection, that is, shell inner support 120 is not directly connected with the body, but is fixed to shell body 110 through connecting support 130, so that the whole of connecting support 130 and shell inner support 120 realizes fixing power management system to shell body 110.

[0040] With the above scheme, by dividing the bracket for installing the BMS into the in-shell bracket 120 and the connecting bracket 130 connected to each other, the in-shell bracket 120 mainly serves to support the installation of the BMS, and the connecting bracket 130 mainly connects the in-shell bracket 120 to the shell body 110. Since the in-shell bracket 120 and the connecting bracket 130 are detachably fixedly connected, a buffer can be arranged between the in-shell bracket 120 and the connecting bracket 130 according to actual needs, or the in-shell bracket 120 and the connecting bracket 130 are connected in a fixed form such as bolt connection, the connecting part between the in-shell bracket 120 and the connecting bracket 130 can be used to enhance the structural strength, compared with the scheme that the bracket is directly integrally welded on the inner wall of the accommodating space 110a and then the BMS is directly installed, the vibration amplitude can be reduced when receiving the vibration, so that the weld is not easy to break, thereby improving the technical problem that the bracket for installing the BMS is easy to break.

[0041] It should be noted that the improvement of the present application is not focused on the specific scheme of the power distribution unit and the battery management system, therefore the specific structure of the two is not described here, and the power distribution unit and the battery management system are not shown in the drawings.

[0042] In an embodiment, referring to Figure 5 The connecting bracket 130 includes a first connecting part 131, a second connecting part 132, and an intermediate bending part 133. The first connecting part 131 forms a mechanical connection with the inner wall of the accommodating space 110a of the shell body 110; the second connecting part 132 is provided with a connecting hole 132a, and the second connecting part 132 is threadedly connected to the shell body 110 at the connecting hole 132a; and the intermediate bending part 133 is formed between the first connecting part 131 and the second connecting part 132 to make the second connecting part 132 protrude from the first connecting part 131 along the first extension direction X1. In a more specific scheme, the first connecting part 131, the intermediate bending part 133, and the second connecting part 132 are integrally formed, and the cross section of the connecting bracket 130 is in the shape of "L" through the connection of the three, the first connecting part 131 of the connecting bracket 130 in the "L" shaped cross section can form a surface contact with the inner wall of the accommodating space 110a of the shell body 110, and the second connecting part 132 can form a surface contact with the in-shell bracket 120, so as to ensure the connection strength between the in-shell bracket 120, the connecting bracket 130, and the shell body 110. The second connecting part 132 is threadedly connected to the in-shell bracket 120 at the connecting hole 132a, and the second connecting part 132 is stably connected to the in-shell bracket 120 through the locking of the thread.

[0043] It is understood that in a further embodiment, when the second connecting part 132 and the inner support 120 are fixed at the connecting hole 132a using a combination of bolts and nuts, a buffer pad is provided between the bolt and the second connecting part 132 and / or between the nut and the second connecting part 132 to buffer vibration and thereby improve structural stability. This embodiment is not shown in the accompanying drawings.

[0044] As the first specific option, refer to Figure 1 and Figure 2 As shown, the two ends of the inner support 120 along the first extension direction X1 are fixed to the shell body 110 by a plurality of spaced connecting brackets 130, thereby realizing the positioning and installation of the inner support 120 on the shell body 110.

[0045] As a second specific option, refer to Figure 3 and Figure 4 As shown, the second connecting portion 132 is provided with multiple connecting holes 132a spaced apart along the second extending direction X2. This solution is equivalent to connecting multiple connecting brackets 130 located at one end of the inner bracket 120 into a single unit, based on the first specific solution. In other words, the length of the connecting bracket 130 in the second extending direction X2 is increased compared to the first specific solution. In this specific solution, the extended connecting bracket 130 is used to bear the load or vibration as a whole, thereby increasing the structural strength and load capacity of the connecting bracket 130 and improving its shock resistance. This further reduces the possibility of battery pack burnout and improves the safety of battery use.

[0046] Considering that opening connection holes 132a on the second connecting portion 132 would affect the overall strength of the connecting bracket 130, but too few connection holes 132a might lead to insufficient connection strength between the connecting bracket 130 and the shell body 110, in one embodiment, the ratio of the distance a between two adjacent connection holes 132a to the length b of the second connecting portion 132 in the second extending direction X2 can be further limited to a range of 0.20 to 0.45, more specifically, this ratio can be, for example, 0.25 to 0.40. This solution results in the number of connection holes 132a being between 2 and 4, ensuring that the connecting bracket 130 has sufficient structural strength while meeting the connection strength requirements between the connecting bracket 130 and the inner support 120. As a specific example, the second extending direction X2 can be perpendicular to the first extending direction X1.

[0047] In a further solution, in the second extension direction X2, the spacing between one of the connecting holes 132a and the other two connecting holes 132a adjacent thereto is different, that is, the spacing between at least some of the connecting holes 132a is different. The different arrangement of the connecting holes 132a can be configured according to the gravity distribution of the battery management system on the in-shell support 120, for example, on the heavier side and the lighter side of the in-shell support 120, so that the spacing between the adjacent connecting holes 132a is different, thereby adapting to the distribution of the load on the in-shell support 120, so that a more stable connection relationship can be formed between the in-shell support 120 and the second connecting portion 132.

[0048] In an embodiment, the ratio of the length c of the in-shell support 120 along the first extension direction X1 to the length b of the second connecting portion 132 along the second extension direction X2 is in the range of 0.25 to 0.35. As a specific example, for example, the length c of the in-shell support 120 along the first extension direction X1 can be 381-379 mm, and the length b of the second connecting portion 132 along the second extension direction X2 can be 105-120 mm. This arrangement allows the second connecting portion 132 to have sufficient length to arrange the connecting holes 132a, and the length of the second connecting portion 132 matches the length of the in-shell support 120, so that the size parameters of the connecting support 130 are adapted to the in-shell support 120 when the in-shell support 120 has different size parameters, and the structural strength between the in-shell support 120 and the connecting support 130 is ensured.

[0049] In an embodiment, the two ends of the in-shell support 120 along the first extension direction X1 are respectively connected to different second connecting portions 132 of the connecting supports 130. When the in-shell support 120 is suspended in the accommodation space 110a, the two ends of the in-shell support 120 are fixed, ensuring stable connection.

[0050] In an embodiment, in the first extension direction X1, at least one connecting hole 132a on the connecting support 130 at one end of the in-shell support 120 is arranged in a staggered manner with at least one connecting hole 132a on the connecting support 130 at the other end of the in-shell support 120. That is, the connecting holes 132a at the two ends of the in-shell support 120 can not be aligned in the first extension direction X1. This staggered arrangement can be flexibly arranged according to the load of the in-shell support 120, and on the other hand, in actual use, the battery management system often needs to communicate with the outside of the shell body 110 through wires passing through the shell body 110 or connection terminals mounted on the shell body 110. The above solution serves as a foolproof design to avoid the in-shell support 120 being installed upside down, thereby facilitating the positioning and installation of the battery management system on the shell body 110.

[0051] For the specific connection form of the first connecting part 131 and the shell body 110, in an embodiment, the first connecting part 131 can be connected with the shell body 110 in a welding fixed manner.

[0052] The above has introduced the embodiments of the utility model in detail, the principle and implementation mode of the utility model have been described in this paper by applying specific examples, the above embodiment explanation is only for helping understanding the method and core idea of the utility model; simultaneously, for the technical personnel in the art, according to the idea of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A housing device for mounting a power distribution unit, characterized by, The shell body forms a containing space for accommodating a power distribution unit; a shell inner support arranged in the containing space for mounting at least one component of a battery management system so that the battery management system and the power distribution unit are integrated on the shell body; a connecting support connecting the shell body and the shell inner support so that the shell inner support is fixed on the shell body; wherein the connecting support and the shell inner support constitute detachable fixed connection.

2. The shell device according to claim 1, wherein the connecting support comprises: a first connecting portion constituting mechanical connection with an inner wall of the shell body forming the containing space; a second connecting portion provided with connecting holes, the second connecting portion constituting screw connection with the shell inner support at the connecting holes; wherein the second connecting portion is arranged protruding from the first connecting portion along a first extension direction.

3. The shell device according to claim 2, wherein the second connecting portion is provided with a plurality of the connecting holes spaced apart along a second extension direction.

4. The shell device according to claim 3, wherein in the second extension direction, a ratio of a spacing between two adjacent connecting holes to a length of the second connecting portion ranges from 0.25 to 0.

45.

5. The shell device according to claim 3, wherein in the second extension direction, a spacing between one of the connecting holes and another two connecting holes adjacent to it is different.

6. The shell device according to claim 3, wherein the second extension direction is perpendicular to the first extension direction.

7. The shell device according to claim 3, wherein a ratio of a length of the shell inner support along the first extension direction to a length of the second connecting portion along the second extension direction ranges from 0.25 to 0.

35.

8. The shell device according to any one of claims 2-7, wherein the first connecting portion is fixedly welded with the shell body.

9. The shell device according to any one of claims 2-7, wherein the two ends of the shell inner support along the first extension direction are respectively connected with different second connecting portions of the connecting support.

10. The shell device according to claim 9, wherein in the first extension direction, at least one connecting hole on the connecting support at one end of the shell inner support is arranged in a staggered manner with at least one connecting hole on the connecting support at the other end of the shell inner support. ​

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