Battery pack packaging and assembling structure

Abstract

The utility model discloses a battery pack packaging and assembling structure, and relates to the technical field of battery pack assembling. The battery pack supporting frame can be coated on the side wall of a battery pack formed by a plurality of battery cells; the water cooling plate is used for adjusting the temperature of the battery pack, a plurality of protruding parts are arranged on at least one side wall of the water cooling plate, and self-tapping screws can penetrate through the protruding parts so that the water cooling plate can be fixed to the bottom of the battery pack supporting frame; and the bottom protection plate can wrap the lower bottom surface of the water cooling plate and is connected to the battery pack supporting frame, groove parts for avoiding the protruding parts are arranged on the bottom protection plate, and a mounting part for allowing a screw to penetrate through so as to mount the bottom protection plate on the battery pack supporting frame is formed between any two adjacent groove parts. And under the conditions that FDS rotary tapping riveting is used and the internal space of the battery pack is narrow, integrated installation of the cold plate and the protection plate of the battery pack is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packaging and assembly, and particularly relates to a battery pack encapsulation and assembly structure. Background Art

[0002] In the research and development and manufacturing of electric vehicles, improving the energy density and safety of battery packs has become a hot topic of concern in the industry. The design of the cooling system of the battery pack is one of the key factors to ensure the safe operation of the battery. At present, the installation method of the cooling plate has a certain impact on the spatial layout and maintenance convenience of the battery pack.

[0003] At present, there are mainly two technologies for installing the battery pack cooling plate: friction stir welding and FDS rotary tapping riveting. The friction stir welding technology fixes the cooling plate on the battery pack frame by performing friction stir welding on the battery pack frame. This method requires sufficient space on both sides of the cooling plate for welding operations, which puts higher requirements on the structure of the battery pack frame and the internal space layout. Although friction stir welding has the advantage of firm connection, its later maintenance and disassembly are difficult, which is not convenient for the repair and replacement of the battery pack.

[0004] Another technology, FDS rotary tapping riveting, designs the thickness of the cooling plate and the battery pack frame cavity so that the FDS screw can be inserted without interference to achieve the tight fixation of the cooling plate. This technology does not require special structural design of the battery pack frame, which greatly simplifies the installation process. At the same time, FDS rotary tapping riveting allows the fastening bolts of the cooling plate and the fastening bolts of the battery pack bottom protection plate to be arranged in different straight lines respectively, and there is enough distance between the two straight lines to ensure the non-interference of the cooling plate and the protection plate during installation. However, this method requires more refined design in the case of a tight internal space of the battery pack to meet complex space requirements.

[0005] Therefore, in the case of using FDS rotary tapping riveting and a narrow internal space of the battery pack, how to facilitate the integrated installation of the battery pack cold plate and the protection plate has become an urgent technical problem to be solved. Summary of the Utility Model

[0006] The main purpose of the utility model is to provide a battery pack encapsulation and assembly structure, aiming to facilitate the integrated installation of the battery pack cold plate and the protection plate in the case of using FDS rotary tapping riveting and a narrow internal space of the battery pack.

[0007] To achieve the above purpose, the utility model provides a battery pack encapsulation and assembly structure, including:

[0008] A battery pack support frame that can cover the side walls of a battery pack composed of multiple battery cells;

[0009] A water-cooling plate for regulating the temperature of the battery pack, wherein a plurality of protruding portions are provided on at least one side wall of the water-cooling plate, and the protruding portions are adapted to allow self-tapping screws to pass through so that the water-cooling plate is fixed to the bottom of the battery pack support frame; and

[0010] A bottom guard plate that can cover the lower bottom surface of the water-cooling plate and is connected to the battery pack support frame. The bottom guard plate is provided with a groove portion for avoiding the protruding portions, and an installation portion for allowing screws to pass through to mount the bottom guard plate on the battery pack support frame is formed between any two adjacent groove portions.

[0011] In an embodiment of the present application, the support frame is an aluminum profile.

[0012] In an embodiment of the present application, the wall thickness of the cavity of the aluminum profile is A, and 2.5 mm ≥ A ≥ 2 mm.

[0013] In an embodiment of the present application, the protruding portion is semi-circular.

[0014] In an embodiment of the present application, the side wall thickness of the water-cooling plate is B, and 2.4 mm ≥ B ≥ 2 mm.

[0015] In an embodiment of the present application, a sealing rubber ring is provided between the water-cooling plate and the bottom guard plate.

[0016] In an embodiment of the present application, the width of the battery pack support frame is C, and 30 mm ≥ C ≥ 25 mm.

[0017] By adopting the above technical solutions, through the close combination of the water-cooling plate and the battery pack, the efficiency and effect of battery temperature regulation are greatly improved, which helps to extend the service life of the battery; the bottom guard plate in the structure not only provides additional physical protection for the water-cooling plate, but also strengthens the stability of the entire structure through the design of the grooves and the protruding portions; at the same time, through the design of the grooves and the protruding portions, it is convenient for the integration and installation of the battery pack cold plate and the protection plate in the case of using FDS rotary tapping riveting and a narrow internal space of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will describe the present invention in detail with reference to specific embodiments and the accompanying drawings, wherein:

[0019] Figure 1 is a bottom perspective three-dimensional structure schematic diagram of the first embodiment of the present invention;

[0020] Figure 2 is Figure 1 an enlarged structure schematic diagram of part A in

[0021] Figure 3 a three-dimensional structure schematic diagram of the water-cooling plate;

[0022] Figure 4 Schematic diagram of the three-dimensional structure of the bottom guard plate;

[0023] Figure 5 Schematic diagram of the combined structure of the sealing ring and the water-cooled plate;

[0024] Figure 6 Cross-sectional view of the battery pack after encapsulation and assembly;

[0025] Figure 7 is Figure 6 Enlarged schematic diagram of the structure at position B in

[0026] 10. Battery pack support frame; 20. Water-cooled plate; 21. Self-tapping screw; 22. Protrusion; 30. Bottom guard plate; 31. Bolt; 32. Groove part; 40. Sealing rubber ring. Specific embodiments

[0027] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0028] As Figures 1 to 7 shown, in order to achieve the above object, the present invention provides a battery pack encapsulation and assembly structure, including:

[0029] A battery pack support frame 10, which can be wrapped around the side wall of a battery pack composed of multiple battery cells;

[0030] A water-cooled plate 20, which is used to adjust the temperature of the battery pack. A plurality of protrusions 22 are provided on at least one side wall of the water-cooled plate 20, and the protrusions 22 can be penetrated by self-tapping screws 21 so that the water-cooled plate 20 is fixed to the bottom of the battery pack support frame 10; and

[0031] A bottom guard plate 30, which can wrap the lower bottom surface of the water-cooled plate 20 and is connected to the battery pack support frame 10. The bottom guard plate 30 is provided with a groove part 32 for avoiding the protrusions 22, and an installation part for allowing screws to pass through to install the bottom guard plate 30 on the battery pack support frame 10 is formed between any two adjacent groove parts 32.

[0032] Specifically, the present invention discloses a battery pack encapsulation and assembly structure, which is composed of three major components: a battery pack support frame 10, a water-cooled plate 20, and a bottom guard plate 30.

[0033] The battery pack support frame 10 is the basis of the structure of the present utility model. Its main function is to stably support the battery pack. Its design can wrap around the side wall of the battery pack composed of multiple battery cells to form an outer protective layer. The battery pack support frame 10 is made of aluminum profile. Using aluminum profile can effectively reduce the weight of the battery pack support frame 10 while providing sufficient support strength.

[0034] The water cooling plate 20 is closely attached to the bottom of the battery pack. Liquid is passed into the water cooling plate 20. When the temperature of the battery pack is too high, the battery pack is cooled by passing in low-temperature liquid. When the temperature of the battery pack is too low, the battery pack is heated by passing in high-temperature liquid. The water cooling plate 20 and the battery pack support frame 10 are connected by self-tapping screws. The water cooling plate 20 and the battery pack support frame 10 cooperate with each other to form a receiving space to realize the support and fixation of the battery pack. At least one side wall of the water cooling plate 20 is provided with a plurality of protruding parts 22, and the number of the protruding parts 22 can be one or more.

[0035] When one side wall of the water cooling plate 20 is provided with a plurality of protruding parts 22, the other three side walls are straight edges;

[0036] When two side walls of the water cooling plate 20 are provided with a plurality of protruding parts 22, the two protruding parts 22 are arranged oppositely, and the other two oppositely arranged side walls are straight edges.

[0037] The processing process of the protruding part 22 in the present application is as follows. The installation positions of the self-tapping screws are pre-planned on the water cooling plate 20 with a predetermined size. After confirming the installation positions of the self-tapping screws, the redundant parts between two adjacent self-tapping screws are cut off, so as to avoid space and reduce the occupation of space by the edge of the water cooling plate 20, which is convenient for the installation of the bottom protection plate 30. This direct fixing method simplifies the assembly process and ensures the close contact between the water cooling plate 20 and the battery pack to achieve the best temperature regulation effect. The plurality in the present application means two or more.

[0038] The bottom protection plate 30 is the bottommost part of the assembly structure. The bottom protection plate 30 covers the lower bottom surface of the water cooling plate 20 to protect the water cooling plate 20 from damage. It can be seen that the surface area of the bottom protection plate 30 is larger than the surface area of the water cooling plate 20. In order to avoid interference between the water cooling plate 20 and the bottom protection plate 30, a groove part 32 for avoiding the protruding part 22 is provided on the bottom protection plate 30, so that the part of the bottom protection plate 30 located between the groove parts 32 can be inserted into the part between the protruding parts 22. Further enhance the stability of the overall structure.

[0039] Its assembly sequence is:

[0040] First, place the designed water cooling plate 20 at the bottom of the battery pack support frame 10, and adjust the position so that the protruding part 22 of the water cooling plate 20 is aligned with the bottom of the battery pack support frame 10;

[0041] Then, self-tapping screws 21 are used to fix the water-cooling plate 20 to the bottom of the battery pack support frame 10 through the protruding part 22 of the water-cooling plate 20;

[0042] Finally, the groove part 32 on the bottom guard plate 30 is aligned with the protruding part 22 of the water-cooling plate 20, closely attached to the lower bottom surface of the water-cooling plate 20, and the bottom guard plate 30 is installed on the battery pack support frame 10 through screws, completing the encapsulation and assembly of the entire battery pack.

[0043] With the above technical solution, through the close combination of the water-cooling plate 20 and the battery pack, the efficiency and effect of battery temperature regulation are greatly improved, which helps to extend the service life of the battery; the bottom guard plate 30 in the structure not only provides additional physical protection for the water-cooling plate 20, but also strengthens the stability of the entire structure through the design of the groove and the protruding part 22; at the same time, through the design of the groove and the protruding part 22, it is convenient to integrate and install the battery pack cold plate and the protection plate in the case of using FDS rotary tapping riveting and the narrow internal space of the battery pack.

[0044] In an embodiment of the present application, the support frame is an aluminum profile.

[0045] With the above technical solution, the density of the aluminum profile is only about 1 / 3 of that of steel. Using the aluminum profile for the support frame can significantly reduce the overall weight while maintaining the structural strength. At the same time, aluminum can quickly form a dense oxide film in the natural environment, and this protective film can effectively prevent further oxidation of the material. Therefore, the aluminum profile has good corrosion resistance. This enables the aluminum profile to be used for a longer time in a harsh environment and reduces the maintenance requirements of the battery pack.

[0046] In an embodiment of the present application, the wall thickness of the cavity of the aluminum profile is A, and 2.5mm ≥ A ≥ 2mm.

[0047] With the above technical solution, within this wall thickness range, the aluminum profile can provide sufficient strength and rigidity to support components such as the battery pack and the attached heat dissipation system. This ensures that when the battery pack is subjected to external forces, such as collision or vibration, etc., it can still maintain the integrity of the structure, thereby protecting the internal battery cells from damage.

[0048] In an embodiment of the present application, the protruding part 22 is semi-circular.

[0049] With the above technical solution, the curve design of the semi-circular protruding part 22 can effectively reduce the stress concentration phenomenon. In mechanical design, sharp corners are prone to become stress concentration points, while smooth edges can disperse the force application points, reducing the risk of material fatigue or damage caused by stress concentration.

[0050] In an embodiment of the present application, the side wall thickness of the water cooling plate 20 is B, where 2.4 mm ≥ B ≥ 2 mm.

[0051] Adopting the above technical solution, within this thickness range, the side wall of the water cooling plate 20 can provide sufficient strength and rigidity to ensure that the water cooling plate 20 can maintain its shape and performance during operation or when affected by external pressure, thereby guaranteeing the effective cooling of the battery pack and overall safety.

[0052] In an embodiment of the present application, a sealing rubber ring 40 is provided between the water cooling plate 20 and the bottom guard plate 30.

[0053] Adopting the above technical solution, by setting the sealing rubber ring 40 between the water cooling plate 20 and the bottom guard plate 30, the sealing rubber ring 40 can prevent external substances from entering the interior of the battery pack through the gap between the water cooling plate 20 and the bottom guard plate 30, thereby improving the safety of the battery.

[0054] In an embodiment of the present application, the width of the battery pack support frame 10 is C, where 30 mm ≥ C ≥ 25 mm.

[0055] Adopting the above technical solution, this width range helps to ensure that the battery pack support frame 10 has sufficient strength and rigidity to support the weight of the battery pack and ensure stability under various operating conditions.

[0056] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A battery pack packaging assembly structure, characterized in that: include: A battery pack support frame can be wrapped around the side wall of a battery pack consisting of a plurality of battery cells; A water cooling plate, used to adjust the temperature of the battery pack, wherein at least one side wall of the water cooling plate is provided with a plurality of protrusions, and the protrusions can be passed through by self-tapping screws to fix the water cooling plate to the bottom of the battery pack support frame; as well as The bottom guard plate can cover the lower bottom surface of the water cooling plate and be connected to the battery pack support frame. The bottom guard plate is provided with a groove portion to avoid the protrusion, and a mounting portion is formed between any two adjacent groove portions for screws to pass through to mount the bottom guard plate on the battery pack support frame.

2. The battery pack packaging assembly structure according to claim 1, characterized in that: The supporting frame is an aluminum profile.

3. The battery pack packaging assembly structure according to claim 2, characterized in that: The cavity wall thickness of the aluminum profile is A, 2.5mm≥A≥2mm.

4. The battery pack packaging assembly structure according to claim 1, characterized in that: The protrusion is semicircular.

5. The battery pack packaging assembly structure according to claim 1, characterized in that: The side wall thickness of the water cooling plate is B, 2.4 mm ≥ B ≥ 2 mm.

6. The battery pack packaging assembly structure according to claim 1, characterized in that: A sealing rubber ring is provided between the water cooling plate and the bottom guard plate.

7. The battery pack packaging assembly structure according to claim 1, characterized in that: The width of the battery pack support frame is C, 30mm≥C≥25mm.

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