BDU mounting structure and battery pack
By setting a limit beam and boss at the bottom of the box, combined with the design of foam and cushion, the problem of BDU fixing method in the prior art destroying airtightness and occupying height space is solved, and the BDU is firm and reliable fixing inside the box is achieved.
Patent Information
- Application Number
- CN202420630293.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-03-28
AI Technical Summary
When the existing BDU fixing method is directly fixed at the bottom of the box, it will destroy the airtightness of the liquid-cooled plate. When the support plate is added to solve the airtightness problem, it will occupy the height space of the box, resulting in the inability to fix the BDU when the height is limited.
A BDU installation structure is designed. By setting a limit beam at the bottom of the box, the BDU part is arranged in the space formed by the limit beam and the bottom of the box. A boss and the limit beam are fixed on the BDU, and foam is provided with a gap between the bottom and the bottom of the box to absorb tolerances, and a buffer pad is provided between the limit beams to improve stability.
While the BDU is fixed inside the box, it does not occupy the bottom space of the box, avoids the impact on airtightness, and provides support and cushioning through foam and cushioning pads to ensure the firm and reliable fixation of the BDU.
Smart Images
Figure CN222802020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery preparation, and in particular to a BDU installation structure and a battery pack. Background Art
[0002] BDU (Battery Disconnect Unit) is also called battery distribution unit. It integrates high-voltage devices, contains pre-charging circuit, charging and discharging circuit, and has functions such as current detection and voltage detection. It is used to control the on and off of the power battery circuit and plays a role in system overload and short-circuit protection.
[0003] Currently, most BDUs are fixed directly to the bottom of the box with bolts, and some BDUs use a top cover connected to the top of the box. These two methods cover almost all mainstream BDU fixing methods inside the box.
[0004] However, at present, the bottom of the main battery box has a liquid cooling plate (Liquid Cooling Plate) of the battery cooling system. Fixing it directly on the liquid cooling plate will destroy the airtightness of the entire box and the liquid cooling plate itself.
[0005] In order to improve the airtightness of the liquid cooling plate, the current mainstream BDU fixing method is to add a support plate above the bottom of the box, and add bolts (nuts) on the support plate to fix the BDU body. The support plate added by this fixing solution occupies the Z-direction dimension (height dimension) of the box. The problem is that when the Z-direction dimension of the box is insufficient, the support plate cannot be added, which affects the fixation of the BDU. Utility Model Content
[0006] Based on the technical problems existing in the background technology, the utility model proposes a BDU installation structure and a battery pack, which can be fixed inside the box without being connected to the bottom of the box, thereby avoiding occupying the height space of the box.
[0007] The utility model proposes a BDU installation structure, wherein at least two limiting beams are arranged at the bottom of a box body, a BDU part is arranged in a space formed by the limiting beams and the bottom of the box body, a boss fixed on the BDU is arranged on the limiting beams, and a gap is arranged between the bottom of the BDU and the bottom of the box body.
[0008] Furthermore, foam is arranged between the bottom of the BDU and the bottom of the box body, and the foam is in a compressed state.
[0009] Furthermore, three limiting beams are arranged in sequence to form a U-shaped space, and bosses are arranged on the sides of the BDU corresponding to the limiting beams.
[0010] Further, two bosses are grouped together, and each group of bosses is disposed at an upper portion of a side surface of the BDU.
[0011] Furthermore, the BDU and the boss are formed integrally.
[0012] Furthermore, a buffer pad is provided between the BDU and the limiting beam, and the boss is screwed to the limiting beam.
[0013] A battery pack includes a shell, a box body provided with a BDU loaded in the shell, and the box body and the BDU are installed in the BDU installation structure described above.
[0014] The advantages of a BDU installation structure and a battery pack provided by the utility model are as follows: a BDU installation structure and a battery pack provided in the utility model structure, the BDU is fixed to the limiting beam by setting a boss as the lifting point of the BDU body, so that the fixed position of the BDU and the box body is raised, and it is fixed inside the box body without being connected to the bottom of the box body, thereby avoiding occupying the height space of the box body, and solving the space problem caused by adding a bottom plate inside the box body when the height space inside the box body is limited; the foam is set to absorb the tolerance (gap) between the BDU3 and the liquid cooling plate. In addition, the foam is in a compressed state, which avoids the manufacturing tolerance of the limiting beam 2 and the BDU causing the boss on the BDU to become a cantilever fixation and cause insufficient box body, provides support and buffer for the BDU, and makes the entire BDU firmly and reliably fixed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 It is a structural schematic diagram of setting a limit beam in the box;
[0017] Figure 3 It is a schematic diagram of the structure of the boss on the BDU;
[0018] Figure 4 for Figure 3 A top view of
[0019] Among them, 1-box, 2-limiting beam, 3-BDU, 4-boss. DETAILED DESCRIPTION
[0020] Below, the technical solution of the utility model is described in detail through specific embodiments. Many specific details are described in the following description to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementation disclosed below.
[0021] like Figures 1 to 4 As shown, a BDU installation structure proposed by the utility model is used for the installation of BDU3 and box body 1, at least two limiting beams 2 are arranged at the bottom of box body 1, BDU3 is partially arranged in the space formed by the limiting beams 2 and the bottom of box body 1, the boss 4 fixed on BDU3 is arranged on the limiting beams 2, and a gap is arranged between the bottom of BDU3 and the bottom of box body 1.
[0022] First, a limiting beam 2 is set at the bottom of the box body 1 to adjust the installation position of the BDU, and then a fixing hole is opened on the limiting beam 2 as a positioning fixing hole of the BDU3 to realize the adjustment of the fixed position of the BDU3 in the box body 1; in addition, a boss 4 is set on the BDU3, and a limiting hole is opened on the boss 4. The limiting hole is screwed with the fixing hole on the limiting beam 2 to realize the fixed setting of the boss 4 and the limiting beam 2. The part of the BDU3 lower than the boss 4 is set in the space formed by the limiting beam 2 and the bottom of the box body 1.
[0023] In this embodiment, the BDU3 is fixed to the limiting beam 2 by setting a boss 4 as the lifting point of the BDU body, so that the fixed position of the BDU3 and the box body 1 is raised, and it is fixed inside the box body 1 without being connected to the bottom of the box body 1, thereby avoiding occupying the height space of the box body 1 and solving the space problem caused by adding a bottom plate inside the box body when the height space inside the box body is limited.
[0024] Because there is a flatness inconsistency between the flatness of the liquid cooling plate at the bottom of the box 1 and the bottom of the BDU3, a gap is set between the bottom of the BDU3 and the bottom of the box 1, so that the BDU3 does not directly contact the liquid cooling plate set at the bottom of the box 1, and foam is set at the gap position to absorb the tolerance (gap) between the BDU3 and the liquid cooling plate. In addition, the foam is in a compressed state to avoid the manufacturing tolerance of the limiting beam 2 and the BDU3 causing the boss 4 on the BDU3 to become a cantilever fixation and cause the box 1 to be insufficient, provide support and buffer for the BDU3, and make the entire BDU firmly and reliably fixed; and this arrangement does not affect the airtightness of the box 1 and the liquid cooling plate, and avoids the box airtightness problem caused by the bottom opening of the box 1.
[0025] It can be understood that in order to avoid occupying the height space of the box body 1, the gap between the bottom of the BDU3 and the bottom of the box body 1 should not be too large. The gap is mainly formed by the manufacturing tolerance between the limit beam 2 and the BDU3. Therefore, compared with the traditional setting of additionally setting a support plate in the box body 1, this setting of the gap reduces the occupied space of the box body 1 in the Z direction.
[0026] Regarding the fixed setting between the limit beam 2 and the boss 4, three limit beams 2 are set in the present embodiment, and the three limit beams 2 are arranged in sequence to form a U-shaped space. The BDU3 is provided with a boss 4 on the side corresponding to the limit beam 2. In the specific use process, two bosses 4 are regarded as a group, and each group of bosses 4 is arranged at the upper part of the side of the BDU3. Each group of bosses 4 is fixed with the corresponding limit beam 2. However, it is not excluded that when the BDU3 itself is provided with a T-shaped structure (with a certain boss) in the length direction, the BDU3 itself can be overlapped on the corresponding limit beam 2. At this time, a threaded hole is opened on the BDU3, and the screw is passed through the threaded hole and the fixing hole on the limit beam 2 to fix it.
[0027] In addition, when BDU3 is fixedly arranged between the limiting beam 2, in order to buffer the shaking or structural instability caused by the suspended arrangement between BDU3 and the limiting beam 2, a buffer pad is arranged between BDU3 and the limiting beam 2. The buffer pad buffers the structure between BDU3 and the limiting beam 2, thereby improving the limiting stability of the BDU.
[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A BDU installation structure, used for installing a BDU (3) and a box (1), characterized in that: At least two limiting beams (2) are arranged at the bottom of the box body (1); the BDU (3) is partially arranged in a space formed by the limiting beams (2) and the bottom of the box body (1); a boss (4) fixed on the BDU (3) is arranged on the limiting beams (2); and a gap is arranged between the bottom of the BDU (3) and the bottom of the box body (1).
2. The BDU installation structure according to claim 1, characterized in that: A foam is arranged between the bottom of the BDU (3) and the bottom of the box (1), and the foam is in a compressed state.
3. The BDU installation structure according to claim 1, characterized in that: Three limiting beams (2) are arranged in sequence to form a U-shaped space, and the BDU (3) is provided with bosses (4) on the side surfaces corresponding to the limiting beams (2).
4. The BDU installation structure according to claim 3, characterized in that: Two bosses (4) form a group, and each group of bosses (4) is arranged at the upper part of the side surface of the BDU (3).
5. The BDU installation structure according to claim 1, characterized in that: The BDU (3) and the boss (4) are integrally formed.
6. The BDU installation structure according to claim 1, characterized in that: A buffer pad is provided between the BDU (3) and the limiting beam (2), and the boss (4) is screwed to the limiting beam (2).
7. A battery pack, characterized in that: The invention comprises a shell, a box body (1) provided with a BDU (3) is loaded in the shell, and the installation method of the box body (1) and the BDU (3) is the BDU installation structure as described in any one of claims 1 to 6.