Battery box and battery pack

Abstract

The utility model relates to battery pack technical field especially is battery box, including box, both sides of box upper end all are fixedly connected with limit board, two limit boards all are L type structure, and the butt joint frame is butt joint in two limit boards, the butt joint frame is positioned through the positioning mechanism, the box upper end is fixedly connected with the lid through the bolt, and the lower surface of butt joint frame and bolt nut butt joint. The utility model guarantees the sealing performance of battery box, prevents dust, water vapor and invades the risk.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to battery housing and battery pack. Background Technology

[0002] The battery pack housing is a structural component that houses and protects the internal components. It consists of a main structure and a sealing system, and has functions such as physical protection and chemical barrier. It is commonly made of materials such as steel and aluminum alloys and is manufactured through processes such as die casting.

[0003] When the enclosure and cover are fixed together with bolts, threaded holes or nuts must be pre-drilled at the corresponding positions. A tight connection is achieved by applying axial force through the bolts. This method ensures connection strength and sealing, facilitates disassembly and maintenance, and requires the use of gaskets or sealant for enhanced protection. The bolts should be evenly distributed to balance the force and adapt to the connection needs of enclosures made of various materials.

[0004] However, after the battery pack is installed, the continuous vibration during vehicle operation can easily loosen the bolts: the vibration will continuously impact the connection points, causing the friction between the threads to gradually decrease and the preload to drop. If the loosening continues, it may damage the sealing performance of the enclosure, allowing dust and moisture to enter, which in turn will cause poor contact of the battery components. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology, which is that vibration can easily loosen the bolts and affect the sealing of the box, and to propose a battery box and battery pack.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The design includes a battery box and a battery pack, comprising a box body, with limiting plates fixedly connected to both sides of the upper end of the box body. Both limiting plates are L-shaped, and abutting frames are abutted inside the two limiting plates. The abutting frames are positioned by a positioning mechanism. A box cover is fixedly connected to the upper end of the box body by bolts, and the lower surface of the abutting frames abuts against the bolt nuts.

[0008] Preferably, a support frame is fixedly connected to the inner wall of the box.

[0009] Preferably, the positioning mechanism includes a fixing ear, which is fixedly connected to the outer wall of the abutment frame. A blind hole is provided on the lower surface of the fixing ear, and a positioning post is inserted into the blind hole. A connecting ear is provided through the lower end of the positioning post, and the connecting ear is fixedly connected to the housing. An elastic mechanism is provided on the positioning post.

[0010] Preferably, the elastic mechanism includes a connecting ring, which is fixedly connected to the positioning post, and a spring is fixedly connected between the connecting ring and the connecting lug, the spring being in a compressed state.

[0011] Preferably, the spring is sleeved on the positioning post.

[0012] Preferably, the connecting ring is fixedly connected to an abutment portion, the outer wall of the housing is fixedly connected to a connecting block, the connecting block is threaded with a fastening bolt, and the abutment portion is located directly below the fastening bolt.

[0013] Preferably, a limiting ring is fixedly connected to the lower end of the fastening bolt, and the diameter of the limiting ring is larger than the diameter of the fastening bolt.

[0014] Preferably, the battery pack includes the aforementioned battery housing.

[0015] The battery box and battery pack proposed in this utility model have the following advantages: the abutment frame can effectively constrain the bolts, directly blocking their axial movement and suppressing loosening at the source. It can stabilize the bolt connection, avoid the loss of preload due to displacement, and thus ensure the sealing performance of the battery box, preventing the risk of dust and moisture intrusion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the battery box structure proposed in this utility model;

[0017] Figure 2 This is a perspective view of the battery box proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the battery box abutment frame proposed in this utility model;

[0019] Figure 4 The battery box proposed in this utility model Figure 2 Enlarged view of part A in the middle.

[0020] In the diagram: 1. Limiting plate; 2. Abutment frame; 3. Box cover; 4. Fixing ear; 5. Support frame; 6. Connecting ear; 7. Positioning post; 8. Spring; 9. Connecting block; 10. Fastening bolt; 11. Limiting ring; 12. Abutment part; 13. Connecting ring; 14. Blind hole; 15. Box body. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: Refer to Figures 1-4The battery housing, including housing 15, and housing 15 and housing cover 3 are both made of aluminum alloy, which is significantly lightweight. The density of aluminum alloy is only one-third that of steel. The strength and rigidity meet the protection requirements, it has good corrosion resistance, flexible processing technology, heat conduction and heat dissipation, and the cost is lower than that of composite materials.

[0023] Limiting plates 1 are fixedly connected to both sides of the upper end of the housing 15. Both limiting plates 1 are L-shaped and abut against the abutment frame 2, preventing the abutment frame 2 from moving axially on the bolt. The abutment frame 2 is abutted inside the two limiting plates 1 and is positioned by a positioning mechanism. The housing cover 3 is fixedly connected to the upper end of the housing 15 by bolts. The lower surface of the abutment frame 2 abuts against the bolt nut. Since the bolt will have axial displacement during loosening, the abutment frame 2 is set to achieve the abutment and limiting function. The abutment frame 2 can effectively constrain the bolt, directly blocking its axial movement tendency and inhibiting loosening from the root. It can stabilize the bolt connection state, avoid the loss of preload due to displacement, and thus ensure the sealing performance of the battery housing, preventing the risk of dust and moisture intrusion.

[0024] A support frame 5 is fixedly connected to the inner wall of the box 15. By setting the support frame 5 to support the inner wall of the box 15, the external force on the box 15 can be effectively distributed, the overall structural stability can be enhanced, and the box 15 can be prevented from deforming due to uneven force or external impact.

[0025] The positioning mechanism includes a fixing ear 4, which is fixedly connected to the outer wall of the abutment frame 2. A blind hole 14 is provided on the lower surface of the fixing ear 4, and a positioning post 7 is inserted into the blind hole 14. A connecting ear 6 is provided through the lower end of the positioning post 7, and the connecting ear 6 is fixedly connected to the housing 15. A spring mechanism is provided on the positioning post 7. The assembly method of inserting the positioning post 7 into the blind hole 14 can form a limiting constraint on the abutment frame 2 in the horizontal plane, restricting the horizontal displacement of the abutment frame 2 and preventing its positional shift due to vibrations and bumps during vehicle operation. Therefore, the abutment frame 2 can always maintain a stable abutment state against the bolts, ensuring its limiting function remains effective, thereby guaranteeing the tightness of the bolt connection and maintaining the overall sealing performance of the battery housing.

[0026] The elastic mechanism includes a connecting ring 13, which is fixedly connected to the positioning post 7. A spring 8 is fixedly connected between the connecting ring 13 and the connecting lug 6. The spring 8 is in a compressed state and is sleeved on the positioning post 7. Using the restoring force of the spring 8, a stable axial force is continuously applied to the positioning post 7, ensuring that the positioning post 7 is firmly inserted into the blind hole 14, forming a tight fit. This effectively counteracts the reverse force generated by vibration and impact during vehicle operation, preventing the positioning post 7 from accidentally dislodging from the blind hole 14. Therefore, the positioning post 7 can always maintain a restraining effect on the abutment frame 2, stably limiting its displacement in the horizontal plane.

[0027] Example 2: In Example 1, because the spring 8 is in a compressed state, it applies a force to the positioning post 7, making it difficult for the positioning post 7 to disengage from the blind hole 14. This increases the inconvenience of operation when the abutment frame 2 needs to be disassembled. (Refer to...) Figures 1-4 As another preferred embodiment of this utility model, based on embodiment 1, abutment part 12 is fixedly connected to connecting ring 13, and connecting block 9 is fixedly connected to outer wall of box 15. Fastening bolt 10 is threaded through connecting block 9. Abutment part 12 is located directly below fastening bolt 10. By adopting the design of fastening bolt 10, when disassembly is required, the lower end of fastening bolt 10 can be moved downward by wrench to abut against abutment part 12, thereby moving abutment part 12 downward, so that connecting ring 13 moves positioning post 7 downward, so that spring 8 is further compressed, so that positioning post 7 is disengaged from blind hole and abutment frame 2 can be disassembled.

[0028] Both the lower surface of the fastening bolt 10 and the upper surface of the abutment part 12 are provided with a wear-resistant layer. The wear-resistant layer is a wear-resistant stainless steel layer. As the fastening bolt 10 rotates and descends, its lower surface will continuously abut against the upper surface of the abutment part 12 and generate friction. Long-term operation will easily lead to wear on the contact surface. By adopting the design of the wear-resistant layer, the wear resistance is improved and the component is prevented from being damaged.

[0029] Example 3: In Example 2, because the fastening bolt 10 was not limited, it disengaged from the threaded hole, resulting in its loss. (Refer to...) Figure 4 As another preferred embodiment of this utility model, based on embodiment 1, a limiting ring 11 is fixedly connected to the lower end of the fastening bolt 10. The diameter of the limiting ring 11 is larger than the diameter of the fastening bolt 10. The limiting ring 11 plays a limiting role on the fastening bolt 10 to prevent the fastening bolt 10 from coming out of the threaded hole.

[0030] During disassembly, the fastening bolt 10 is rotated counterclockwise and lowered by a wrench. The fastening bolt 10 drives the positioning post 7 to descend synchronously through the connecting ring 13, so that the positioning post 7 is disengaged from the blind hole 14 and the horizontal limit on the abutment frame 2 is released. Then, the abutment frame 2 is pushed to disengage it from the longitudinal limit of the limit plate 1, exposing the fixing bolts on the box cover 3, which can then be disassembled.

[0031] Example 4: Reference Figures 1-4 As another preferred embodiment of the present invention, based on embodiment 3, the battery pack includes a battery housing.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery housing, comprising a housing (15), characterized in that, The upper sides of the box (15) are fixedly connected to limit plates (1). Both limit plates (1) are L-shaped. The two limit plates (1) are abutted by abutting frame (2). The abutting frame (2) is positioned by a positioning mechanism. The upper end of the box (15) is fixedly connected to a box cover (3) by bolts. The lower surface of the abutting frame (2) abuts against the bolt nut.

2. The battery housing according to claim 1, characterized in that, The inner wall of the box (15) is fixedly connected to a support frame (5).

3. The battery housing according to claim 1, characterized in that, The positioning mechanism includes a fixed ear (4), which is fixedly connected to the outer wall of the abutment frame (2). A blind hole (14) is provided on the lower surface of the fixed ear (4). A positioning post (7) is inserted into the blind hole (14). A connecting ear (6) is provided through the lower end of the positioning post (7). The connecting ear (6) is fixedly connected to the housing (15). An elastic mechanism is provided on the positioning post (7).

4. The battery housing according to claim 3, characterized in that, The elastic mechanism includes a connecting ring (13), which is fixedly connected to the positioning post (7). A spring (8) is fixedly connected between the connecting ring (13) and the connecting ear (6), and the spring (8) is in a compressed state.

5. The battery housing according to claim 4, characterized in that, The spring (8) is sleeved on the positioning post (7).

6. The battery housing according to claim 4, characterized in that, The connecting ring (13) is fixedly connected to an abutment (12), and the outer wall of the box (15) is fixedly connected to a connecting block (9). A fastening bolt (10) is threaded through the connecting block (9), and the abutment (12) is located directly below the fastening bolt (10).

7. The battery housing according to claim 6, characterized in that, The lower end of the fastening bolt (10) is fixedly connected to a limiting ring (11), the diameter of which is larger than the diameter of the fastening bolt (10).

8. A battery pack, characterized in that, Includes the battery housing as described in any one of claims 1-7.

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