A battery PACK box for new energy vehicles

Abstract

The utility model provides a new energy vehicle battery PACK box body belongs to battery PACK box body technical field, include PACK lower box body ontology still include: protection mechanism, protection mechanism includes the upper plate fixed in PACK lower box body bottom, the bottom fixed connection ring of upper plate, the bottom fixed lower plate of connection ring, the thickness of upper plate is greater than the thickness of lower plate, the utility model discloses through setting upper plate, lower plate and connecting strip, upper plate is fixed in PACK lower box bottom, lower plate is fixed in lower plate bottom through connecting strip, when the knock, lower plate deformation, the buffer cavity is formed between upper plate and lower plate, and the buffer cavity is used to accommodate the deformation of lower plate when being knocked, and is influenced by the thickness of upper plate is greater than the thickness of lower plate, when the lower plate is deformed and is pressed against the upper plate, the upper plate of greater thickness can also effectively resist the greater deformation of the lower plate, greatly reduce the influence to the liquid cooling plate and battery in the PACK lower box body ontology, thereby improve the protection ability to the liquid cooling plate and battery.

Description

Technical Field

[0001] This utility model relates to the field of battery frame technology, and in particular to a battery pack housing for new energy vehicles. Background Technology

[0002] The battery pack enclosure is a key structural component of a complete battery pack, mainly consisting of a frame and a liquid cooling plate installed within the frame. It houses and protects all battery components. The battery frame is a structure used in new energy vehicles to provide protection and heat dissipation for the battery. The battery is installed within the frame, and the liquid cooling plate dissipates heat during battery operation. A protective plate is also installed at the bottom of the frame, with underbody armor coated on the bottom of the plate. The cooperation between the protective plate and the underbody armor achieves protection for the liquid cooling plate and battery within the frame.

[0003] In common new energy vehicle battery pack enclosures, during use, the frame's bottom guard plate is often scratched or bumped by the road surface. Typically, the guard plate and the underbody armor sprayed on its bottom protect the battery and liquid cooling plate within the frame. However, when the guard plate deforms due to scratches or bumps, the bottom of the guard plate becomes concave and the top bulges upwards. This causes the liquid cooling plate to be compressed by the deformed area, making its internal fluid channels prone to deformation. If the deformation is too severe, it can even damage the battery. Therefore, the frame's ability to protect the battery needs improvement. This application provides a new energy vehicle battery pack enclosure to meet this requirement. Summary of the Invention

[0004] This utility model provides a battery pack housing for new energy vehicles to solve the problem that when the protective plate is scratched or bumped and deformed, the liquid cooling plate is squeezed by the deformed area of ​​the protective plate, causing the internal fluid channels to easily deform. When the deformation of the protective plate is slightly large, it will also damage the battery. The frame's ability to protect the battery needs to be improved.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A battery pack housing for new energy vehicles includes a lower housing body and further includes: The protective mechanism includes an upper plate fixed to the bottom of the lower enclosure body of the PACK, a connecting ring fixed to the bottom of the upper plate, a lower plate fixed to the bottom of the connecting ring, the thickness of the upper plate being greater than the thickness of the lower plate, a buffer cavity being formed between the lower plate and the upper plate, and multiple buffer components being provided in the buffer cavity.

[0006] Preferably, the bottom of the lower plate has multiple indicator lines that divide the lower plate into multiple buffer zones, each buffer zone corresponding to a set of buffer components.

[0007] Preferably, the buffer assembly includes a plurality of buffer strips fixed to the top of the lower plate, with the top of the buffer strips abutting against the bottom of the upper plate.

[0008] Preferably, the buffer bar includes a connecting part and two buffer parts, both of which are fixed to the top of the connecting part, the connecting part is fixed to the top of the lower plate, and the top of the buffer parts abuts against the bottom of the lower plate.

[0009] Preferably, the buffer section is arc-shaped, and the bending directions of the two buffer sections on the same buffer strip are opposite.

[0010] Preferably, a V-shaped groove is provided at the top of the connecting part between the two buffer parts.

[0011] Preferably, the bottom of the upper plate is fixed with multiple protruding strips, and the buffer strip is located between two adjacent protruding strips.

[0012] Preferably, the bottom of the convex strip is a downwardly curved surface, and multiple grooves are formed on the curved surface.

[0013] Preferably, the opposite sides of the convex strip are integrally formed with inclined portions.

[0014] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, by setting up an upper plate, a lower plate, and a connecting strip, the upper plate is fixed to the bottom of the frame, and the lower plate is fixed to the bottom of the lower plate by the connecting strip. When an impact occurs, the lower plate deforms, and a buffer cavity is formed between the upper and lower plates. The buffer cavity is used to accommodate the deformation of the lower plate when it is impacted. Due to the influence of the upper plate being thicker than the lower plate, when the lower plate undergoes a large deformation and presses against the upper plate, the thicker upper plate can also effectively resist the large deformation of the lower plate, greatly reducing the impact on the liquid cooling plate and battery inside the PACK lower housing, thereby improving the protection capability of the liquid cooling plate and battery.

[0015] By setting a buffer strip, which is fixed to the top of the lower plate, it provides support when the lower plate deforms. This improves the deformation resistance of the lower plate by increasing its structural strength. Furthermore, it can deform along with the lower plate after deformation and buffer and offset the impact on the lower plate through its own deformation, thereby further improving the protection of the liquid cooling plate and battery inside the PACK lower housing.

[0016] By setting a connecting part, a buffer part, and a V-shaped groove, the connecting part is used to connect the buffer part to the lower plate. When the lower plate deforms, the connecting part drives the buffer part to deform. The buffer part is arc-shaped. When the buffer part deforms, the arc guides its own deformation direction to prevent the buffer part from excessively squeezing the upper plate. At the same time, the V-shaped groove is opened between the two buffer parts to reduce the connection strength between the buffer part and the connecting part, which is more conducive to the smooth deformation of the buffer part. The deformation of the buffer part is used to offset the impact force on the lower plate.

[0017] By setting indicator lines, the bottom of the lower plate is divided into multiple areas. Each area corresponds to a buffer component consisting of multiple buffer strips. When an impact occurs, the lower plate can be cut along the indicator lines to cut off the deformed part of the lower plate. Then, a pre-produced part of the lower plate can be welded onto the lower plate for continued use without replacing the entire lower plate, thus saving on usage costs.

[0018] By setting protruding strips, which are fixed to the bottom of the upper plate, the structural strength of the upper plate is further improved, and its resistance to deformation is further enhanced.

[0019] By setting curved surfaces and grooves, with the curved surfaces located at the bottom of the convex strips, the deformation resistance of the convex strips themselves is improved, thereby further enhancing the structural strength of the lower plate. At the same time, the grooves are opened on the curved surfaces, which can reduce the weight of the entire protective mechanism and greatly reduce the impact of the protective mechanism on the range of new energy vehicles.

[0020] By setting an inclined section, after the buffer section deforms to the side of the inclined section, the buffer section can abut against the side of the inclined section. The inclined section limits the degree of deformation of the buffer section, thereby effectively improving the rigidity of the lower plate and preventing excessive deformation of the buffer section from affecting the rigidity of the lower plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the indicator line of this utility model; Figure 3 This is a three-dimensional structural diagram of the lower plate of this utility model; Figure 4 This is a cross-sectional view of the protruding strip of this utility model; Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is a three-dimensional structural diagram of the buffer strip of this utility model.

[0022] In the diagram: 1. PACK lower enclosure body; 2. Protective mechanism; 3. Upper plate; 4. Lower plate; 5. Connecting ring; 6. Buffer strip; 7. Connecting part; 8. Buffer part; 9. V-groove; 10. Raised strip; 11. Curved surface; 12. Groove; 13. Inclined part; 14. Indicator line.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0024] The present invention provides a battery pack housing for new energy vehicles, which is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0025] like Figures 1-6 As shown, an embodiment of this utility model provides a battery pack housing for new energy vehicles, including a lower housing body 1, and further comprising: Protective mechanism 2 includes an upper plate 3 fixed to the bottom of the PACK lower housing 1. A connecting ring 5 is fixed to the bottom of the upper plate 3, and a lower plate 4 is fixed to the bottom of the connecting ring 5. The thickness of the upper plate 3 is greater than that of the lower plate 4, forming a buffer cavity between the lower plate 4 and the upper plate 3. Multiple buffer components are installed in the buffer cavity. The PACK lower housing 1 provides an installation and support carrier for the battery and liquid cooling plate. The protective mechanism 2 is fixed to the bottom of the PACK lower housing 1, forming a bottom anti-collision structure to prevent impact forces from directly acting on the battery and liquid cooling plate inside the PACK lower housing 1. The connecting ring 5 connects the upper plate 3 and the lower plate 4, and simultaneously forms a buffer between them. The enclosed buffer cavity, with the upper plate 3 being thicker than the lower plate 4, makes the lower plate 4 the first stress-bearing component in the event of an impact, causing it to deform first and absorb the impact force. The buffer cavity provides ample space to accommodate the deformation of the lower plate 4, preventing the deformation from being directly transmitted to the PACK lower housing body 1. If the lower plate 4 deforms significantly and presses against the upper plate 3, the thicker upper plate 3 can effectively resist the deformation force, greatly reducing the transmission of the impact force. Structurally, this achieves double-layer protection, effectively protecting the battery and liquid cooling plate inside the PACK lower housing body 1 from impact damage. The buffer assembly further enhances the energy absorption and deformation resistance of the buffer cavity, assisting the lower plate 4 in offsetting the impact force and strengthening the overall protection effect.

[0026] like Figure 2As shown in this embodiment, multiple indicator lines 14 are provided at the bottom of the lower plate 4. The indicator lines 14 divide the lower plate 4 into multiple buffer zones, each buffer zone corresponding to a set of buffer components. The indicator lines 14 provide a precise cutting reference for the local maintenance of the lower plate 4, dividing the lower plate 4 into buffer zones that correspond one-to-one with the buffer components. When the lower plate 4 is locally deformed due to an impact, the deformed area can be locally cut along the indicator lines 14. Only the pre-produced local parts of the lower plate 4 need to be replaced and welded to the cut position to restore the use of the protective mechanism 2. There is no need to replace the entire lower plate 4, which greatly reduces the cost of later maintenance and parts.

[0027] like Figure 3 As shown in this embodiment, the buffer assembly includes multiple buffer strips 6 fixed to the top of the lower plate 4. The top of the buffer strips 6 abuts against the bottom of the upper plate 3. The buffer strips 6 support the structure in the buffer cavity. One end is fixed to the lower plate 4 and the other end abuts against the upper plate 3. When the lower plate 4 is impacted and deformed, the buffer strips 6 provide structural support for the lower plate 4, directly improving the deformation resistance of the lower plate 4 and preventing excessive deformation of the lower plate 4. At the same time, the buffer strips 6 will deform synchronously with the deformation of the lower plate 4, absorbing and offsetting part of the impact force through their own deformation, further reducing the transmission of the impact force to the lower box body 1 of the PACK, achieving the dual effect of support and energy absorption, and strengthening the buffer protection capability of the protective mechanism 2.

[0028] like Figure 5 and Figure 6 As shown in this embodiment, the buffer strip 6 includes a connecting part 7 and two buffer parts 8. Both buffer parts 8 are fixed to the top of the connecting part 7, which is fixed to the top of the lower plate 4. The top of the buffer parts 8 rests against the bottom of the lower plate 4. The connecting part 7 provides a stable fixed foundation for the buffer parts 8, realizing a firm connection between the buffer strip 6 and the lower plate 4. This ensures that when the lower plate 4 deforms, the buffer parts 8 can be driven to deform synchronously through the connecting part 7, ensuring that the energy absorption and support effects of the buffer strip 6 are effectively utilized. The two buffer parts 8 directly abut against the bottom of the upper plate 3. The buffer parts 8 are the main deformation energy absorption structure of the buffer strip 6. They offset the impact force transmitted by the lower plate 4 through their own deformation, preventing the lower plate 4 from deforming excessively into the buffer cavity, and further improving the deformation resistance of the lower plate 4.

[0029] like Figure 6 As shown in this embodiment, the buffer part 8 is arc-shaped, and the two buffer parts 8 on the same buffer strip 6 bend in opposite directions. The arc-shaped structure of the buffer part 8 gives it good deformation capability. Compared with the straight strip structure, it can deform more smoothly and absorb more impact force. The design of the two buffer parts 8 on the same buffer strip 6 bending in opposite directions ensures that the deformation of the two buffer parts 8 does not affect each other.

[0030] like Figure 6As shown in this embodiment, a V-shaped groove 9 is provided at the top of the connecting part 7 between the two buffer parts 8. The V-shaped groove 9 reduces the thickness of the connection area between the connecting part 7 and the two buffer parts 8, and reduces the connection strength between them. This allows the buffer parts 8 to deform more smoothly when driven by the deformation of the lower plate 4, avoiding the obstruction of the deformation of the buffer parts 8 due to excessive connection strength. This ensures that the buffer parts 8 can effectively offset the impact force on the lower plate 4 through sufficient deformation. At the same time, the groove structure of the V-shaped groove 9 can guide the deformation direction of the buffer parts 8, further preventing the two buffer parts 8 from squeezing each other when deforming, and ensuring the energy absorption efficiency of the buffer strip 6.

[0031] like Figure 4 and Figure 5 As shown in this embodiment, multiple protrusions 10 are fixed to the bottom of the upper plate 3, and the buffer strip 6 is located between two adjacent protrusions 10. The protrusions 10 greatly improve the structural strength and deformation resistance of the upper plate 3 itself, making the upper plate 3 more stable when resisting the deformation force of the lower plate 4, and less prone to bending or denting.

[0032] like Figure 5 As shown in this embodiment, the bottom of the protrusion 10 is a downwardly curved surface 11, and multiple grooves 12 are formed on the curved surface 11. Compared with a flat surface, the curved surface 11 at the bottom of the protrusion 10 can improve the deformation resistance of the protrusion 10 itself. The grooves 12 formed on the curved surface 11 can significantly reduce the overall weight of the protective mechanism 2 while ensuring the structural strength and deformation resistance of the protrusion 10, thereby reducing the energy consumption of new energy vehicles and improving the range of vehicles.

[0033] like Figure 5 As shown in this embodiment, the opposite sides of the protrusion 10 are integrally formed with inclined portions 13. The inclined portions 13 provide a limit for the deformation of the buffer portion 8. When the buffer portion 8 deforms with the lower plate 4 to contact the side of the inclined portion 13, the inclined portion 13 will block the buffer portion 8, limit the excessive deformation of the buffer portion 8, and ensure the overall structural stability of the lower plate 4.

[0034] Working principle: The upper plate 3 of the protective mechanism 2 is fixed to the bottom of the PACK lower enclosure body 1, and the lower plate 4 is fixed to the bottom of the upper plate 3 through the connecting ring 5. The thickness of the upper plate 3 is greater than the thickness of the lower plate 4, and a buffer cavity is formed between the two. When the bottom of the PACK lower enclosure body 1 is bumped, the lower plate 4 is the first to be subjected to force and deform. The buffer cavity provides a space to accommodate the deformation of the lower plate 4, and avoids the deformation from being directly transmitted to the interior of the PACK lower enclosure body 1. If the lower plate 4 undergoes significant deformation and presses against the upper plate 3, the thicker upper plate 3 can effectively resist the deformation force of the lower plate 4, greatly reducing the impact of the impact force on the liquid cooling plate and battery inside the PACK lower housing 1, and improving basic protection capabilities. The buffer cavity has multiple buffer components corresponding to the position of the lower plate 4. Each buffer component consists of multiple buffer strips 6. The buffer strips 6 are fixed to the top of the lower plate 4 and the top of the buffer strips abuts against the bottom of the upper plate 3. When the lower plate 4 is deformed by force, the buffer strips 6 provide structural support for the lower plate 4 and improve the deformation resistance of the lower plate 4. At the same time, when the lower plate 4 deforms, the buffer strips 6 will deform synchronously with the lower plate 4, and buffer and offset part of the collision force through their own deformation, further reducing the transmission of impact force. The buffer strip 6 consists of a connecting part 7 and two buffer parts 8. The connecting part 7 achieves a fixed connection between the buffer parts 8 and the lower plate 4. When the lower plate 4 deforms, the buffer parts 8 are driven to deform through the connecting part 7. The buffer parts 8 are arc-shaped and the two buffer parts 8 on the same buffer strip 6 have opposite bending directions. The arc-shaped structure can guide the deformation direction of the buffer parts 8 and prevent the buffer parts 8 from excessively squeezing the upper plate 3. A V-shaped groove 9 is provided at the top of the connecting part 7 corresponding to the position between the two buffer parts 8, which reduces the connection strength between the buffer part 8 and the connecting part 7, makes the deformation of the buffer part 8 smooth, and effectively offsets the impact force on the lower plate 4 through the full deformation of the buffer part 8. Multiple protruding strips 10 are fixed to the bottom of the upper plate 3. The buffer strip 6 is located between two adjacent protruding strips 10. The protruding strips 10 directly improve the structural strength and deformation resistance of the upper plate 3. Its bottom is a downward curved surface 11, which further enhances the deformation resistance of the protruding strips 10 themselves and indirectly enhances the resistance to deformation of the lower plate 4. Multiple grooves 12 are also opened on the curved surface 11 to reduce the overall weight of the protective mechanism 2 while ensuring structural strength and reducing the impact on the range of new energy vehicles. The opposite sides of the protrusion 10 are integrally formed with inclined portions 13. When the buffer portion 8 deforms to the side of the inclined portion 13, the inclined portion 13 will limit the buffer portion 8, restrict the excessive deformation of the buffer portion 8, effectively improve the overall rigidity of the lower plate 4, and avoid the buffer portion 8 from being damaged due to excessive deformation. The bottom of the lower plate 4 has multiple indicator lines 14, which divide the bottom of the lower plate 4 into multiple buffer zones. Each buffer zone corresponds to a set of buffer components. When the lower plate 4 is partially deformed due to an impact, the lower plate 4 can be partially cut along the indicator lines 14. Only the deformed part is cut off, and then the pre-produced part of the lower plate 4 is welded to the cut position of the original lower plate 4. The protective mechanism 2 can be restored to use without replacing the entire lower plate 4, which greatly saves the later maintenance and use costs.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack housing for new energy vehicles, comprising a lower housing body (1), characterized in that, Also includes: The protective mechanism (2) includes an upper plate (3) fixed to the bottom of the PACK lower box body (1), a connecting ring (5) fixed to the bottom of the upper plate (3), a lower plate (4) fixed to the bottom of the connecting ring (5), the thickness of the upper plate (3) is greater than the thickness of the lower plate (4), a buffer cavity is formed between the lower plate (4) and the upper plate (3), and multiple buffer components are provided in the buffer cavity.

2. The battery pack housing for new energy vehicles according to claim 1, characterized in that, The bottom of the lower plate (4) has multiple indicator lines (14) that divide the lower plate (4) into multiple buffer zones, each buffer zone corresponding to a set of buffer components.

3. The battery pack housing for new energy vehicles according to claim 1, characterized in that, The buffer assembly includes multiple buffer strips (6) fixed to the top of the lower plate (4), with the top of the buffer strips (6) abutting against the bottom of the upper plate (3).

4. The battery pack housing for new energy vehicles according to claim 3, characterized in that, The buffer bar (6) includes a connecting part (7) and two buffer parts (8). The two buffer parts (8) are fixed to the top of the connecting part (7). The connecting part (7) is fixed to the top of the lower plate (4). The top of the buffer part (8) rests against the bottom of the lower plate (4).

5. The battery pack housing for new energy vehicles according to claim 4, characterized in that, The buffer section (8) is arc-shaped, and the two buffer sections (8) on the same buffer strip (6) have opposite bending directions.

6. The battery pack housing for new energy vehicles according to claim 4, characterized in that, A V-shaped groove (9) is provided at the top of the connecting part (7) between the two buffer parts (8).

7. The battery pack housing for new energy vehicles according to claim 3, characterized in that, The bottom of the upper plate (3) is fixed with multiple protrusions (10), and the buffer strip (6) is located between two adjacent protrusions (10).

8. The battery pack housing for new energy vehicles according to claim 7, characterized in that, The bottom of the protrusion (10) is a downward curved surface (11), and multiple grooves (12) are formed on the curved surface (11).

9. The battery pack housing for new energy vehicles according to claim 7, characterized in that, The opposite sides of the protrusion (10) are integrally formed with inclined portions (13).

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