Universal power battery pack box body

Abstract

The utility model relates to the technical field of power batteries, and discloses a universal power battery pack box body, which comprises a box body for accommodating a battery cell module and a plurality of hanging lugs connected to the box body through bolts, reinforcing structures are arranged on two opposite sides of the box body, the reinforcing structures and the side walls of the box body form edge beams of the box body, and the edge beams are connected with the box body through bolts. The reinforcing structure comprises a mounting reinforcing beam and a mounting reinforcing plate, the mounting reinforcing beam is located between the box body and the mounting reinforcing plate, and mounting holes used for mounting the hanging lugs are formed in the mounting reinforcing beam and the mounting reinforcing plate. In practical application, the overall mechanical strength of the battery pack box body is effectively improved, and the production cost of the battery pack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a universal power battery pack box. Background Art

[0002] In the current field of battery pack design and application, the stability and safety of the battery pack are one of the key factors to ensure the performance and endurance of electric vehicles. In traditional design solutions, the battery pack's ear fixing mechanism is generally connected to the side beam, and the side beam mostly adopts an integrated frame structure. Although this design has improved the structural integration and production efficiency to a certain extent, with the development of technology and the deepening of practical application, this solution has revealed some problems and shortcomings.

[0003] 1. Low mechanical strength: Although the one-piece side beam has good overall rigidity, it is easy to form stress concentration areas at specific stress points, such as the connection of the lugs. Long-term exposure to vibration and impact during vehicle driving may cause local fatigue damage or even cracks, affecting the stability and service life of the battery pack. In addition, once a collision occurs, the single force path of the side beam may not be sufficient to effectively disperse the impact force, increasing the risk of battery damage.

[0004] 2. High production cost: The integrated molding of the side beam usually relies on high-strength steel or aluminum alloy materials to meet the needs of bearing the huge weight of the battery pack. However, the cost of such materials is relatively high, and when processing complex structures, the control of mold costs and scrap rates becomes a problem, which increases the overall cost of the battery pack. Utility Model Content

[0005] The utility model aims to provide a universal power battery pack case to solve the problems of high production cost and low structural mechanical strength of the existing battery pack cases.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a universal power battery pack box, including a box body for accommodating a battery cell module and a plurality of hanging ears bolted to the box body, the box body is provided with a reinforcement structure on two opposite sides thereof, the reinforcement structure and the side wall of the box body together constitute the side beam of the box body, the reinforcement structure includes a mounting reinforcement beam and a mounting reinforcement plate, the mounting reinforcement beam is located between the box body and the mounting reinforcement plate, and both the mounting reinforcement beam and the mounting reinforcement plate are provided with mounting holes for installing the hanging ears.

[0007] The principles and advantages of this solution are:

[0008] 1. In actual application, the reinforcing structure in this scheme and the side wall of the box body together constitute the side beam of the battery pack box. Compared with the one-piece side beam in the prior art, which has reduced overall mechanical strength due to excessive rigidity, the side beam of this scheme is composed of multiple parts. The mounting reinforcement beam and the mounting reinforcement plate are provided with mounting holes for installing hanging ears, so that the stress of the hanging ears on the side beam is dispersed to multiple parts, reducing the stress concentration on the side beam. While ensuring the structural strength of the side beam, it avoids structural fracture caused by excessive rigidity, so that the box as a whole has higher mechanical strength. When the vehicle or battery pack is impacted, the box of this scheme can effectively absorb high-frequency vibrations from the road, reduce the aging effect on the internal structure of the battery pack, and extend the service life of the battery pack.

[0009] 2. The side beams in this solution are composed of multiple components. Compared with the integrated side beams that require more complex molds and processing technologies, the structures of the components in this solution are relatively simple, and the requirements for molds and technology during the production process are relatively low. Standardized production can be used for components with simple structures, which reduces the mold development cost and production complexity, and is conducive to reducing the scrap rate of products, thereby reducing the mold cost and material cost in production, thereby reducing the overall production cost of the battery pack and saving enterprise resources.

[0010] 3. The reinforcement structure of this solution includes a mounting reinforcement plate and a mounting reinforcement beam, which can be separately disassembled and connected. When the battery pack or side beam is partially damaged, the damaged parts can be replaced independently without the need to replace the box or side beam as a whole as in the prior art. The maintenance difficulty is reduced, the maintenance cost is reduced, and the maintenance cycle is shortened.

[0011] 4. In this solution, multiple hanging ears are individually bolted to the box body through the mounting holes on the reinforcement structure. The position of the hanging ears can be adjusted according to the outer envelope provided by the customer (i.e. the overall shape of the car's exterior covering or decorative parts and its spatial relationship with the surrounding environment), which is conducive to the battery pack box to meet various needs and improve the versatility of the box.

[0012] Furthermore, the mounting reinforcement beam includes a plurality of right-angle U-shaped grooves continuously distributed along the vertical direction, the openings of the right-angle U-shaped grooves face the horizontal direction, and the openings of two adjacent right-angle U-shaped grooves are opposite.

[0013] The above-mentioned arrangement makes the cross-section of the mounting reinforcement beam present a continuous right-angle bend shape. On the one hand, the continuous bending structure enables the mounting reinforcement beam to reduce the overall weight while ensuring the structural strength; on the other hand, each right-angle U-shaped groove can be regarded as a supporting structure. The continuous distribution in the vertical direction provides support in the vertical direction, and the opposite design of adjacent openings increases the stability of the structure in the horizontal direction. When the vehicle is subjected to a collision or severe bumps, it can better protect the internal battery cells from damage.

[0014] Furthermore, the main body of the mounting reinforcement plate is an L-shaped reinforcement plate, the opening of the L-shaped reinforcement plate faces the box body, and the L-shaped reinforcement plate is provided with an inverted L-shaped support plate at the end of its transverse structure, and the inverted L-shaped support plate is used to support the bottom of the box body.

[0015] The above arrangement allows the mounting reinforcement beam to be located within the opening space of the L-shaped reinforcement plate. The L-shaped structure provides side and bottom protection for the mounting reinforcement beam, thereby improving the overall impact resistance of the reinforcement structure. At the same time, the inverted L-shaped support plate can support the bottom of the box body, which is beneficial to improving the overall structural strength of the box.

[0016] Furthermore, a protective structure is provided at the outer bottom of the box body, and the protective structure includes a plurality of external cross beams along the width direction of the box body, and a plurality of external longitudinal beams along the length direction of the box body are provided between two adjacent external cross beams.

[0017] The above-mentioned protective structure not only protects the bottom of the box body, reducing the impact of the bottom impact on the internal structure of the battery pack, but also supports the bottom of the box to enhance the overall structural strength of the box.

[0018] Furthermore, the external cross beam and the external longitudinal beam are both formed by bending sheet metal and the middle portions of both protrude toward the ground.

[0019] In the above arrangement, the protruding parts of the external cross beams and the external longitudinal beams make the lowest plane of the box body have a certain distance from the bottom surface of the box body. When the bottom of the box body is impacted, the protruding parts of the external cross beams and the external longitudinal beams serve as the first line of protection, dispersing and absorbing more energy, thereby effectively reducing the impact force transmitted to the battery cell, reducing the risk of damage, and improving the pressure and impact resistance of the bottom of the battery pack.

[0020] Furthermore, one end of the mounting reinforcement beam is flush with the outer surface of the box body, and the other end protrudes from the outer surface of the box body, wherein a flat plate connector is provided flush with the outer surface of the box body, and an angle connector is provided at one end protruding from the outer surface of the box body, and both the flat plate connector and the angle connector are connected to the box body and the mounting reinforcement plate.

[0021] The flat plate connector and the corner connector increase the connection stability between the reinforcement structure and the box body, and enhance the mechanical strength of the overall structure of the box.

[0022] Furthermore, the mounting reinforcement plate is provided with an installation notch that matches with the end of the external cross beam.

[0023] The above arrangement allows the two ends of the external beam to extend into the interior of the reinforced structure through the installation notch, thereby strengthening the reinforced structure as a whole. At the same time, the part of the external beam extending into the interior of the reinforced structure protrudes from both sides of the box body. When subjected to a side impact, the external beam can effectively buffer the side impact force and improve the compressive resistance of the battery pack side.

[0024] Furthermore, the box body is provided with mounting beams along its width direction for mounting and fixing the battery cell module.

[0025] The mounting beam ensures that the battery cell module is stably positioned in the box body to prevent vibration and displacement. At the same time, it carries the weight of the battery cell, distributes the force, ensures safety and extends battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view of the box body of the embodiment of the utility model.

[0027] Figure 2 It is a bottom view of the box body of the utility model embodiment.

[0028] Figure 3 It is a schematic diagram of the connection of the hanging ears in the embodiment of the utility model.

[0029] Figure 4 This is a schematic diagram of the box structure after the hanging ears are removed according to an embodiment of the utility model.

[0030] Figure 5 for Figure 4 A partial enlarged view of part A. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks in the drawings of the specification include: box body 1, hanging ear 2, reinforcement structure 3, mounting reinforcement beam 31, right-angle U-shaped groove 311, mounting reinforcement plate 32, L-shaped reinforcement plate 321, inverted L-shaped support plate 322, installation notch 323, installation hole 33, flat plate connector 34, corner connector 35, protective structure 4, external cross beam 41, external longitudinal beam 42, installation beam 5.

[0033] The embodiment is basically as shown in the attached Figure 1-5As shown: A universal power battery pack box, including a box body 1 for accommodating a battery cell module. The box body 1 is a caisson structure with a rectangular groove in the middle, and the top and sides thereof are all protruding outward to form flanges. The box body 1 is made of metal sheet metal bent and welded, and has a simple structure and reliable strength. A mounting beam 5 for mounting and fixing the battery cell module is installed in the box body 1 along its width direction. The mounting beam 5 can ensure that the battery cell module is stably positioned in the box body 1 to prevent vibration displacement, while bearing the weight of the battery cell and distributing the force. A plurality of hanging ears 2 are installed on the box body 1, and the battery pack is connected and fixed to the frame through the hanging ears 2. The plurality of hanging ears 2 are individually bolted to the box body 1, and the size and shape of the hanging ears 2 are designed according to the actual installation environment and position of the battery pack.

[0034] like Figure 2-Figure 5 As shown in the combination, the box body 1 is provided with a reinforcement structure 3 on two opposite sides thereof, the reinforcement structure 3 is distributed along the length direction of the box body 1, the reinforcement structure 3 is located between the hanging ear 2 and the box body 1, the reinforcement structure 3 and the side wall of the box body 1 together form the side beam of the box body, the reinforcement structure 3 includes a mounting reinforcement beam 31 and a mounting reinforcement plate 32, the mounting reinforcement beam 31 and the mounting reinforcement plate 32 are respectively connected and fixed to the box body 1, the mounting reinforcement beam 31 is located between the box body 1 and the mounting reinforcement plate 32, the mounting reinforcement beam 31 and the mounting reinforcement plate 32 are both provided with a mounting hole 33 for mounting the hanging ear 2, and The mounting holes 33 on the two correspond to each other, and bolt assemblies are installed in the mounting holes 33; through such an arrangement, the stress of the mounting ear 2 on the side beam can be dispersed to the mounting reinforcement beam 31 and the mounting reinforcement plate 32, avoiding the one-piece molded side beam from cracking or breaking due to stress concentration, so that the box body as a whole has higher mechanical strength; at the same time, the side beam is composed of a combination of multiple components, compared with the one-piece molded side beam that requires more complex molds and processing technology, the structure of each component in this solution is relatively simple, and the requirements for molds and technology in the production process are relatively low, effectively reducing production costs.

[0035] like Figure 4 , Figure 5As shown in the figure, the main body of the mounting reinforcement plate 32 is an L-shaped reinforcement plate 321, the opening of the L-shaped reinforcement plate 321 faces the box body 1, and the mounting reinforcement beam 31 is located in the opening space formed by the L-shaped reinforcement plate 321. The L-shaped structure of the mounting reinforcement plate 32 protects the mounting reinforcement beam 31 from the side and bottom, thereby improving the overall impact resistance of the reinforcement structure 3; the L-shaped reinforcement plate 321 is provided with an inverted L-shaped support plate 322 at the end of its transverse structure, and the inverted L-shaped support plate 322 is used to support the bottom of the box body 1 to enhance the overall structural strength of the box. In order to enhance the connection stability between the reinforcement structure 3 and the box body 1, one end of the mounting reinforcement beam 31 is flush with the outer surface of the box body 1, and the other end protrudes from the outer surface of the box body 1, wherein a flat plate connector 34 is provided flush with the outer surface of the box body 1, and an end protruding from the outer surface of the box body 1 is provided with an angle connector 35, and the flat plate connector 34 and the angle connector 35 are both connected to the box body 1 and the mounting reinforcement plate 32.

[0036] like Figure 4 , Figure 5 As shown in the figure, the mounting reinforcement beam 31 includes a plurality of right-angle U-shaped grooves 311 continuously distributed in the vertical direction, the openings of the right-angle U-shaped grooves 311 face the horizontal direction, and the openings of two adjacent right-angle U-shaped grooves 311 are opposite. The mounting reinforcement beam 31 is an integrally formed structure, and the cross-section of the mounting reinforcement beam 31 is a continuous right-angle bend. On the one hand, the continuous bending structure enables the mounting reinforcement beam 31 to reduce the overall weight while ensuring the structural strength; on the other hand, each right-angle U-shaped groove 311 can be regarded as a supporting structure, and the continuous distribution in the vertical direction provides support in the vertical direction, and the opposite design of adjacent openings increases the stability of the structure in the horizontal direction, so that when the vehicle is subjected to a collision or severe bumps, the internal battery cells can be better protected from damage.

[0037] like Figure 2 As shown, a protective structure 4 is provided at the outer bottom of the box body 1, and the protective structure 4 includes multiple external cross beams 41 along the width direction of the box body 1, and multiple external longitudinal beams 42 along the length direction of the box body 1 are provided between two adjacent external cross beams 41. The external cross beams 41 and the external longitudinal beams 42 are both formed by bending sheet metal. The protective structure 4 not only protects the bottom of the box body 1 and reduces the impact of the bottom impact on the internal structure of the battery pack, but also supports the bottom of the box to enhance the overall structural strength of the box; further, the middle parts of the external cross beams 41 and the external longitudinal beams 42 protrude toward the ground. When the bottom of the box is impacted, the protruding parts of the external cross beams 41 and the external longitudinal beams 42 serve as the first line of protection to disperse and absorb more impact energy, thereby effectively reducing the impact force transmitted to the battery cell, reducing the risk of damage, and improving the pressure and impact resistance of the bottom of the battery pack.

[0038] like Figure 5As shown, the mounting reinforcement plate 32 is provided with an installation notch 323 that cooperates with the end of the external beam 41 at the inverted L-shaped support plate 322, and the two ends of the external beam 41 extend into the reinforcement structure 3 through the installation notch 323 to strengthen the reinforcement structure 3 as a whole. At the same time, the part of the external beam 41 extending into the reinforcement structure 3 protrudes from both sides of the box body 1. When subjected to a side impact, the external beam 41 can effectively buffer the side impact force and improve the compressive resistance of the side of the battery pack.

[0039] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A universal power battery pack box, characterized in that: It includes a box body for accommodating the battery cell module and a plurality of hanging ears connected to the box body by bolts. The box body is provided with a reinforcement structure on two opposite sides thereof. The reinforcement structure and the side wall of the box body together form the side beam of the box body. The reinforcement structure includes a mounting reinforcement beam and a mounting reinforcement plate. The mounting reinforcement beam is located between the box body and the mounting reinforcement plate. Both the mounting reinforcement beam and the mounting reinforcement plate are provided with mounting holes for installing the hanging ears.

2. A universal power battery pack box according to claim 1, characterized in that: The mounting reinforcement beam includes a plurality of right-angle U-shaped grooves continuously distributed along the vertical direction, the openings of the right-angle U-shaped grooves face the horizontal direction, and the openings of two adjacent right-angle U-shaped grooves are opposite.

3. A universal power battery pack box according to claim 2, characterized in that: The main body of the mounting reinforcement plate is an L-shaped reinforcement plate, the opening of the L-shaped reinforcement plate faces the box body, and the L-shaped reinforcement plate is provided with an inverted L-shaped support plate at the end of its transverse structure, and the inverted L-shaped support plate is used to support the bottom of the box body.

4. A universal power battery pack box according to claim 3, characterized in that: A protective structure is provided at the outer bottom of the box body, and the protective structure includes a plurality of external cross beams along the width direction of the box body, and a plurality of external longitudinal beams along the length direction of the box body are provided between two adjacent external cross beams.

5. A universal power battery pack box according to claim 4, characterized in that: The external cross beam and the external longitudinal beam are both formed by bending sheet metal, and the middle parts of both of them protrude toward the ground.

6. A universal power battery pack box according to claim 5, characterized in that: One end of the mounting reinforcement beam is flush with the outer surface of the box body, and the other end protrudes from the outer surface of the box body, wherein a flat plate connector is provided flush with the outer surface of the box body, and an angle connector is provided at one end protruding from the outer surface of the box body, and both the flat plate connector and the angle connector are connected to the box body and the mounting reinforcement plate.

7. A universal power battery pack box according to claim 6, characterized in that: The mounting reinforcement plate is provided with an installation notch which matches with the end of the external cross beam.

8. A universal power battery pack box according to claim 7, characterized in that: The box body is provided with mounting beams along its width direction for mounting and fixing the battery core module.

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