BDU mounting structure convenient to disassemble and maintain, battery system and vehicle

Abstract

The utility model relates to the technical field of vehicle power batteries, in particular to a BDU installation structure convenient to disassemble and maintain, a battery system and a vehicle, the installation structure comprises a first installation plate and a second installation plate which are detachably connected in an electrical bin of a battery pack box body, and the bottom end of the electrical bin is provided with a maintenance window penetrating in the thickness direction; one side, facing the maintenance window, of the first mounting plate is provided with a first mounting surface, and the first mounting surface is used for fixing a first device; a second mounting surface is arranged on one side, deviating from the maintenance window, of the second mounting plate, and is used for fixing a second device; the first device is a device connected through a copper bar, and the first device and the copper bar are detachably connected to the first mounting surface through a fastener; and the second device is a device which is not connected through a copper bar. The disassembly is convenient, and the BDU maintenance is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of vehicle power battery technology, specifically to a BDU mounting structure, battery system and vehicle that are easy to disassemble and maintain. Background Technology

[0002] In existing battery pack designs, the cover is integrally integrated onto the battery pack body. When inspection or maintenance of electrical components within the electrical compartment is required, the entire cover must be removed. This disassembly is extremely difficult and inefficient, and can easily damage the cover or related structures. Taking the CTV (Cell to Vehicle) battery structure as an example, it highly integrates the battery with the lower vehicle floor, directly integrating the cells into the vehicle's bottom frame, achieving a seamless integration of the battery and the vehicle body. However, after the vehicle rolls off the production line, disassembling the vehicle floor is not only time-consuming and labor-intensive, but also presents numerous challenges for the maintenance of the BDU (Battery Disconnect Unit). Utility Model Content

[0003] The purpose of this utility model is to provide a BDU mounting structure, battery system and vehicle that are easy to disassemble and maintain, which facilitates BDU maintenance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] In a first aspect, this utility model provides a BDU mounting structure that facilitates disassembly and maintenance, including a first mounting plate and a second mounting plate detachably connected to the electrical compartment of the battery pack housing. The electrical compartment has a maintenance window extending through the thickness direction at its bottom end. The first mounting plate has a first mounting surface on the side facing the maintenance window, which is used to fix a first device. The second mounting plate has a second mounting surface on the side away from the maintenance window, which is used to fix a second device. The first device is a device connected via a copper busbar, and the first device and the copper busbar are detachably connected to the first mounting surface via fasteners. The second device is a device not connected via a copper busbar.

[0006] Furthermore, the first mounting plate is detachably connected to the inner wall of the electrical compartment via several first bolts.

[0007] Furthermore, the first mounting plate is a horizontally arranged quadrilateral plate, and the inner wall of the electrical compartment is provided with mounting parts at the four corners corresponding to the first mounting plate. The mounting parts are provided with threads that are compatible with the first bolt.

[0008] Furthermore, the second mounting plate is detachably connected to the inner wall of the electrical compartment via several brackets.

[0009] Furthermore, the second mounting plate is a horizontally arranged quadrilateral plate; there are four brackets, each corresponding to one of the four corners of the quadrilateral plate; the brackets are detachably connected to the inner wall of the electrical compartment by second bolts; and the second mounting plate is detachably connected to the brackets by third bolts.

[0010] Furthermore, the first device includes a relay and a fuse.

[0011] Furthermore, the electrical compartment and the battery compartment of the battery pack housing are arranged at intervals in the front-to-back direction.

[0012] Furthermore, a maintenance cover for closing the maintenance window is detachably connected to the bottom of the battery pack housing.

[0013] Secondly, this utility model provides a battery system that includes the aforementioned BDU mounting structure that facilitates disassembly and maintenance.

[0014] Thirdly, this utility model provides a vehicle that includes the aforementioned battery system.

[0015] This utility model has the following unexpected beneficial effects:

[0016] The mounting structure of this invention mounts a first component connected via a copper busbar on the side of a first mounting plate facing the maintenance window (the first mounting surface), while a second component not connected via a copper busbar is mounted on the side of a second mounting plate facing away from the maintenance window (the second mounting surface). This allows for the partitioning of different types of components, creating a clear and organized layout that facilitates management and maintenance. Furthermore, the first component and the copper busbar are detachably connected to the first mounting surface via fasteners, enabling the individual disassembly and replacement of the component connected to the copper busbar during maintenance. This eliminates the need for extensive disassembly of the entire battery pack, allowing direct operation of the first component mounted on the first mounting plate through the maintenance window. This significantly reduces maintenance time and labor costs, and improves maintenance efficiency. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.

[0018] Figure 1 The diagram shows the layout of the BDU mounting structure, which facilitates disassembly and maintenance according to this invention, within the battery pack housing.

[0019] Figure 2 A schematic diagram of the structure of the first mounting plate in an embodiment of the present invention is shown.

[0020] Figure 3 A schematic diagram of the structure of the second mounting plate in an embodiment of the present invention is shown.

[0021] Figure 4 A top view of the first and second mounting plates in the electrical compartment according to an embodiment of the present invention is shown.

[0022] Figure 5 A schematic diagram of the fixing of the bracket according to an embodiment of the present invention is shown.

[0023] Figure 6 The diagram shows a bottom view of the first and second mounting plates in the electrical compartment according to an embodiment of the present invention.

[0024] Figure 7 A schematic diagram of the fixing of the maintenance cover plate according to an embodiment of the present invention is shown.

[0025] In the figure, 1—first mounting plate, 11—first bolt, 12—first lug, 2—second mounting plate, 21—third bolt, 22—second lug, 23—projection weld nut, 3—first component, 4—second component, 5—copper busbar, 6—fastener, 7—bracket, 71—second bolt;

[0026] 10—Electrical compartment, 20—Battery compartment, 30—Maintenance cover, 40—Battery pack cover. Detailed Implementation

[0027] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] In one embodiment, see Figures 1 to 7As shown, this utility model provides a BDU mounting structure that facilitates disassembly and maintenance, including a first mounting plate 1 and a second mounting plate 2 detachably connected to an electrical compartment 10 within the battery pack housing. The electrical compartment 10 has a maintenance window extending through its thickness at its bottom end. The first mounting plate 1 has a first mounting surface on the side facing the maintenance window, which is used to fix a first component 3. The second mounting plate 2 has a second mounting surface on the side away from the maintenance window, which is used to fix a second component 4. The first component 3 is connected via a copper busbar 5, and the first component 3 and the copper busbar 5 are detachably connected to the first mounting surface via fasteners 6; the second component 4 is not connected via a copper busbar.

[0030] The installation structure of this utility model mounts the first device 3, connected by a copper busbar 5, on the side of the first mounting plate 1 facing the maintenance window, i.e., the first mounting surface. The second device 4, not connected by a copper busbar, is mounted on the side of the second mounting plate 2 away from the maintenance window, i.e., the second mounting surface. This allows for the partitioned installation of different types of devices, resulting in a clear and organized layout that facilitates management and maintenance. Furthermore, the first device 3 and the copper busbar 5 are detachably connected to the first mounting surface by fasteners 6, enabling the individual disassembly and replacement of the first device 3 connected by the copper busbar 5 during maintenance. This eliminates the need for extensive disassembly of the entire battery pack, allowing direct operation of the first device 3 mounted on the first mounting plate 1 through the maintenance window. This significantly saves maintenance time and labor costs, and improves maintenance efficiency.

[0031] The second device 4 is fixed on the side of the second mounting plate 2 away from the maintenance window, i.e., the second mounting surface, to prevent external dust from entering, reduce the impact of dust on the second device 4, thereby ensuring the working stability of the second device 4, effectively extending its service life, reducing the probability of device failure caused by external factors such as dust, and improving the reliability of the entire BDU system.

[0032] In practice, when the first component 3 needs repair or replacement, the fastener 6 is removed, and the connection between the first component 3 and the copper busbar and the first mounting plate 1 is loosened. This allows for the inspection and repair of the first component 3 without the need for large-scale disassembly of the entire battery pack, greatly simplifying the repair process and saving repair time and costs. Similarly, when the second component 4 needs repair or replacement, the second mounting plate 4 is removed from the electrical compartment 10, allowing for the inspection and repair of the second component 4. This also avoids a complex disassembly process, improves repair efficiency, and enables repair personnel to locate and resolve problems more quickly.

[0033] As a preferred embodiment of this utility model, see [link to relevant documentation]. Figure 2 As shown, the first mounting plate 1 is detachably connected to the inner wall of the electrical compartment 10 by a number of first bolts 11.

[0034] Using bolted connections can provide a more uniform and stable fastening force, ensuring that the first mounting plate 1 will not loosen due to vibration, shaking or other factors during battery pack operation. This ensures that the first device 3 installed on the first mounting plate 1 can work stably and reduces problems such as poor contact and device damage caused by loose mounting plate.

[0035] Furthermore, the bolted connection facilitates the quick removal of the first mounting plate 1 from the electrical compartment 10 when the first component 3 on the first mounting plate 1 needs to be repaired or replaced. Maintenance personnel can easily remove the first mounting plate 1 for operation simply by unscrewing the bolts with the appropriate tools, and it can also be easily fixed back in place during installation. The operation is simple and quick, improving maintenance efficiency.

[0036] Further, see Figure 2 As shown, the first mounting plate 1 is a horizontally arranged quadrilateral plate. The four corners of the first mounting plate 1 are provided with first lugs 12 extending horizontally outwards, and each lug 12 has a through hole for the first bolt 11 to pass through. The inner wall of the electrical compartment 10 is provided with mounting portions corresponding to the four corners of the first mounting plate 1, and these mounting portions have threads adapted to the first bolt 11.

[0037] The first mounting plate 1 is quadrilateral and has first lugs 12 at its four corners. It is connected to the mounting part of the inner wall of the electrical compartment 10 by first bolts 11, forming a stable four-point connection structure. During the operation of the battery pack, it can evenly distribute forces from all directions, such as vibrations and bumps generated when the vehicle is driving, making the connection between the first mounting plate 1 and the inner wall of the electrical compartment 10 more stable and avoiding loosening or deformation caused by uneven local forces, thereby ensuring the stable operation of the first device 3 installed on the first mounting plate 1.

[0038] The first lug 12 extends horizontally outward, increasing the actual connection area between the first mounting plate 1 and the inner wall of the electrical compartment 10, enabling the connection to withstand greater tensile and shear forces, further improving the reliability of the connection, and ensuring that the first mounting plate 1 will not easily detach from the inner wall of the electrical compartment 10 under complex working conditions.

[0039] As a preferred embodiment of this utility model, see [link to relevant documentation]. Figures 3 to 5 As shown, the second mounting plate 2 is detachably connected to the inner wall of the electrical compartment 10 via several brackets 7.

[0040] The second mounting plate 2 is connected via bracket 7, allowing for flexible adjustment of its position and angle based on the internal space layout and actual needs of the electrical compartment 10. This method makes more rational use of the limited space within the electrical compartment 10, resulting in a more scientific installation position for the second device 4. It avoids installation inconvenience or unreasonable device layout caused by space limitations, and helps improve the overall space utilization of the battery pack.

[0041] Several brackets 7 are distributed between the second mounting plate 2 and the inner wall of the electrical compartment 10, which can evenly bear the weight of the second mounting plate 2 and the second device 4 on it, as well as various forces (such as vibration and impact) generated during operation. Compared with a single connection point, multiple brackets 7 provide a more stable support structure, reducing the possibility of the second mounting plate 2 shaking or deforming due to uneven force, thereby ensuring the stability of the second device 4 and extending its service life.

[0042] Because the connection between bracket 7 and the inner wall of electrical compartment 10 and the second mounting plate 2 is detachable, it is easy to perform operations when it is necessary to fine-tune the installation position of the second device 2, or to inspect or replace bracket 7 itself. Maintenance personnel can adjust the installation position of bracket 7 or replace damaged brackets according to the actual situation to ensure that the second mounting plate 2 and the second device 4 are always in optimal working condition.

[0043] Further, see Figures 3 to 5 As shown, the second mounting plate 2 is a horizontally arranged quadrilateral plate. The four corners of the second mounting plate 2 are provided with second lugs 22 extending horizontally outwards. Each lug 22 has a through hole for a third bolt 21 to pass through. There are four brackets 7, each corresponding to one of the four corners of the quadrilateral plate. The brackets 7 are detachably connected to the inner wall of the electrical compartment 10 via second bolts 71, and the second mounting plate 2 is detachably connected to the brackets 7 via third bolts 21.

[0044] The second lug 22 corresponds one-to-one with the bracket 7, and the lug 22 has through holes. During installation, maintenance personnel can quickly align the four corners of the second mounting plate 2 with the corresponding bracket 7, and then insert the third bolt 21 through the through holes for fixation, achieving precise positioning and installation. This design reduces installation difficulty, improves installation efficiency, and reduces adjustment time during the installation process.

[0045] When repairing or replacing the second component 4, the third bolt 21 can be removed first to remove the second mounting plate 2 from the bracket 7. If maintenance or replacement of the bracket 7 is required, the second bolt 71 can be removed to remove the bracket 7 from the inner wall of the electrical compartment 10. This step-by-step disassembly method makes the maintenance process more flexible and convenient, eliminating the need for large-scale disassembly of the entire structure and saving maintenance time and costs.

[0046] In a preferred embodiment of the present invention, the first device 3 includes a relay and a fuse.

[0047] The relays in a BDU include high-voltage main positive / main negative relays, pre-charge relays, and fast-charge relays. Relays control the on / off state of the circuit. Connected via copper busbars, they can be linked to high-voltage circuits to control and distribute current. For example, the high-voltage main positive / main negative relay controls the connection between the battery pack and external circuits. During vehicle startup, driving, and charging, it connects or disconnects the circuit as needed to ensure normal power transmission and safe control. The pre-charge relay, in conjunction with a pre-charge resistor, pre-charges capacitors and other components when the vehicle is powered on, preventing large current surges at power-on. The copper busbar provides a reliable electrical connection for this function.

[0048] A fuse is a component in a battery drain circuit (BDU) used to protect the circuit. When an overcurrent occurs in the circuit, the fuse element melts, cutting off the circuit and protecting other electrical equipment from damage. A copper busbar connects the fuse in series in the circuit, allowing the fuse to monitor the current in the circuit in real time. When the current exceeds the fuse's rated current, the fuse trips, cutting off the faulty circuit through the copper busbar, thus protecting important equipment such as battery packs and motors.

[0049] As a preferred embodiment of this utility model, see [link to relevant documentation]. Figure 1 As shown, the electrical compartment 10 and the battery compartment 20 of the battery pack are arranged at intervals along the front-to-back direction, which can make more rational use of the space in the battery pack housing. This layout can flexibly adjust the size and position of the two compartments (electrical compartment 10 and battery compartment 20) according to the size, shape and working requirements of the electrical equipment and battery pack, improving space utilization and making the internal structure of the battery pack more compact and orderly.

[0050] Because the electrical compartment 10 and the battery compartment 20 are separately located, components with different functions are concentrated in different areas. This allows for easier positioning and operation when maintaining or repairing electrical equipment or battery packs, avoiding mutual interference. For example, maintenance personnel are not affected by the battery pack when inspecting electrical equipment, improving maintenance efficiency and reducing maintenance difficulty.

[0051] As a preferred embodiment of this utility model, see [link to relevant documentation]. Figure 1 As shown, the top opening of the electrical compartment 10 is sealed by the battery pack cover plate 40, which can effectively prevent dust, moisture, foreign objects and other contaminants from entering the electrical compartment, protect the electrical equipment from the influence of the external environment, help reduce the failure of the electrical equipment caused by external factors, extend its service life and improve the reliability of the battery pack.

[0052] As a preferred embodiment of this utility model, see [link to relevant documentation]. Figure 1 As shown, a maintenance cover 30 for closing the maintenance window is detachably connected to the bottom of the battery pack housing.

[0053] The maintenance cover 30 can seal the maintenance window, effectively preventing external dust, moisture, foreign objects, etc. from entering the electrical compartment 10 of the battery pack. This provides excellent protection for the first device 3, the second device 4, etc. installed in the electrical compartment, reducing device damage or failure caused by external factors, ensuring the normal working environment of the devices in the electrical compartment 10, thereby improving the reliability and stability of the entire BDU system.

[0054] When it is necessary to repair or replace components such as the first device 3 located near the maintenance window, the maintenance cover 30 can be easily removed, and the operation can be performed directly through the maintenance window without the need for extensive disassembly of other parts of the battery pack. This method greatly simplifies the maintenance process, saves maintenance time and labor costs, and improves maintenance efficiency. At the same time, after the maintenance is completed, the maintenance cover 30 can be easily reinstalled, restoring the battery pack to its sealed state.

[0055] The maintenance cover 30 is detachable, allowing it to be reused in multiple maintenance operations. When the maintenance cover 30 is damaged or worn, it can be easily replaced without replacing the entire battery pack housing, thus reducing maintenance costs.

[0056] In another embodiment, the present invention also provides a battery system including the BDU mounting structure described in any of the above embodiments that facilitates disassembly and maintenance.

[0057] In another embodiment, the present invention also provides a vehicle that includes the battery system described above.

[0058] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A BDU mounting structure which is convenient for disassembly and repair, characterized by: Includes a first mounting plate (1) and a second mounting plate (2) that are detachably connected to the electrical compartment (10) of the battery pack housing, wherein the bottom end of the electrical compartment (10) is provided with a maintenance window that extends through the thickness direction; The first mounting plate (1) has a first mounting surface on the side facing the maintenance window, which is used to fix the first device (3). The second mounting plate (2) has a second mounting surface on the side opposite to the maintenance window, which is used to fix the second device (4). The first device (3) is a device connected by a copper busbar (5), and the first device (3) and the copper busbar (5) are detachably connected to the first mounting surface by fasteners (6); the second device (4) is a device not connected by a copper busbar.

2. The BDU mounting structure for easy disassembly and repair according to claim 1, characterized by: The first mounting plate (1) is detachably connected to the inner wall of the electrical compartment (10) by a number of first bolts (11).

3. The BDU mounting structure for easy disassembly and maintenance according to claim 2, characterized in that: The first mounting plate (1) is a horizontally arranged quadrilateral plate. The inner wall of the electrical compartment (10) is provided with mounting parts at the four corners corresponding to the first mounting plate (1). The mounting parts are provided with threads that are compatible with the first bolt (11).

4. The BDU mounting structure of claim 1, wherein: The second mounting plate (2) is detachably connected to the inner wall of the electrical compartment (10) via several brackets (7).

5. The BDU mounting structure of claim 4, wherein: The second mounting plate (2) is a horizontally arranged quadrilateral plate; The number of brackets (7) is four, and the four brackets (7) correspond to the four corners of the quadrilateral plate respectively. The brackets (7) are detachably connected to the inner wall of the electrical compartment (10) by the second bolt (71). The second mounting plate (2) is detachably connected to the brackets (7) by the third bolt (21).

6. The BDU mounting structure that facilitates disassembly maintenance according to claim 1, characterized in that: The first device (3) includes a relay and a fuse.

7. The BDU mounting structure that facilitates disassembly maintenance according to claim 1, characterized in that: The electrical compartment (10) and the battery compartment (20) of the battery pack housing are arranged at intervals in the front-to-back direction.

8. The BDU mounting structure that facilitates disassembly maintenance according to claim 1, characterized in that: The bottom of the battery pack housing is detachably connected to a maintenance cover (30) for closing the maintenance window.

9. A battery system characterized by: Includes the BDU mounting structure that facilitates disassembly and maintenance as described in any one of claims 1 to 8.

10. A vehicle characterized by: Includes the battery system as described in claim 9.

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