Battery pack bottom protection plate and battery pack

Abstract

The utility model provides a battery pack bottom guard plate and battery pack, the battery pack bottom guard plate includes frame, rotatingly set up a plurality of blades in the frame, and with the angle adjustment mechanism of each blade transmission connection, angle adjustment mechanism is used for adjusting the rotation angle of blade, and along the flow direction of air flow from inside to outside, the angle adjustment mechanism is used for adjusting the rotation angle of blade. And the thicknesses of the blades are gradually reduced. According to the battery pack bottom protection plate, the rotating angle of each blade is adjusted through the angle adjusting mechanism, the requirement for heat dissipation or heat preservation of the battery pack is met, the performance of the battery pack is improved, and the battery pack can be more stably and stably fixed through the arrangement that the thicknesses of the blades are gradually reduced and the angles of the blades are adjusted in the flowing direction of air flow from inside to outside. And the wind resistance of the vehicle in the driving process can be adjusted and reduced, so that the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery package bottom guard plate, and simultaneously, the utility model relates to a battery package with the battery package bottom guard plate. BACKGROUND

[0002] The battery package bottom guard plate is an important component for protecting the bottom of the battery package of a new energy vehicle, is located at the bottom of the lower shell of the battery package, and can be used for protecting the bottom of the battery package, thereby improving the safety of the battery package. However, in order to improve the heat dissipation and heat preservation effect of the battery package, multiple blades are arranged on the battery package bottom guard plate in the prior art, and the rotation angle of the blades is adjusted to meet the heat preservation or heat dissipation requirement of the battery package. However, such blades are not conducive to reducing the flow resistance during the driving of the vehicle, thereby increasing the energy consumption of the vehicle. SUMMARY

[0003] Therefore, the utility model aims at providing a battery package bottom guard plate to reduce the flow resistance when the battery package is mounted on a vehicle.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A battery package bottom guard plate comprises a frame, multiple blades rotatably arranged in the frame, and an angle adjusting mechanism connected with each blade in transmission, the angle adjusting mechanism is used for adjusting the rotation angle of the blade, and the thickness of the blade gradually decreases along the flow direction of the airflow from inside to outside.

[0006] Further, a hollow cavity is formed in each blade, and at least one of the cavities contains an air bag;

[0007] The air bag is triggered when the external force borne by the blade exceeds a preset threshold, and is ejected from the bottom of the blade.

[0008] Further, a weak area is arranged at the bottom of the blade, and the air bag breaks through the weak area and is ejected from the bottom of the blade; and / or,

[0009] At least one of the bottoms of the blades is provided with a pressure detection part for detecting the external force borne by the blade.

[0010] Further, each blade is rotatably arranged in the frame through the rotating shafts at both ends;

[0011] The angle adjusting mechanism comprises a gear arranged on one of the rotating shafts, and a rack slidingly arranged on the frame in a first direction, the rack is connected with the gear in transmission, and each blade is driven to rotate through the gear, and the first direction is perpendicular to the axial direction of the rotating shaft.

[0012] Further, a guide part is arranged between the rack and the frame, and the guide part is used to guide the rack to slide in the first direction.

[0013] Further, the guide part comprises a sliding block arranged on the rack and a sliding groove arranged on the frame and extending in the first direction, and the sliding block is arranged in the sliding groove and slides in the sliding groove.

[0014] Further, the angle adjusting mechanism further comprises a linear driving part, and a power output end of the linear driving part is connected with one end of the rack and drives the rack to slide in the first direction.

[0015] Further, the angle adjusting mechanism is arranged at two ends of each of the blades.

[0016] Further, the frame is provided with a mounting cavity, and the angle adjusting mechanism is arranged in the mounting cavity.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The battery pack bottom protection plate is adjusted by the angle adjusting mechanism, so that the heat dissipation or heat preservation requirement of the battery pack can be met, the performance of the battery pack is improved, the air resistance of the vehicle during driving is reduced by the air flow direction from inside to outside, the thickness of the blades is gradually reduced, and the angle of the blades is adjusted, so that the air resistance of the vehicle during driving is reduced, and the energy consumption is reduced.

[0019] In addition, the hollow cavity is formed in each blade, space is provided for the air bag, the battery pack bottom protection plate is lightened, the air bag is triggered and ejected when the external force borne by the blade exceeds the preset threshold, and the protection effect of the bottom of the battery pack is improved. By arranging the weak area, the air bag is easily ejected from the bottom of the blade, and the protection effect of the air bag after ejection is ensured; the pressure detection part can detect the external force borne by the blade, provide accurate basis for triggering of the air bag, ensure that the air bag is ejected only when protection is really needed, avoid unnecessary triggering, and improve the accuracy and reliability of protection. The linear motion of the rack is converted into the rotary motion of the blade through the gear, the transmission mode has high transmission efficiency and accuracy, the angle of the blade can be accurately adjusted, and the angle of the blade can be finely adjusted through the accurate sliding of the rack on the frame.

[0020] In addition, the guide part enables the rack to slide along the first direction only, so that the transmission between the rack and the gear is more accurate. By being arranged in the sliding groove through the sliding block, the rack can be effectively prevented from shaking or deviating during the sliding. The linear driving part drives the rack to move through the linear motion power, which is beneficial to improve the convenience of the rack sliding. By arranging two angle adjusting mechanisms, the stability of the blade angle adjustment is improved. The installation cavity arranged in the frame provides a special installation space for the angle adjusting mechanism, so that the structure of the bottom guard plate is more compact, the occupation of the external space is reduced, and the angle adjusting mechanism is also protected to a certain extent.

[0021] In addition, another purpose of the battery pack is to provide a battery pack, which comprises the battery pack bottom guard plate as described above.

[0022] The battery pack has the battery pack bottom guard plate, so that the use performance of the battery pack is improved, the wind resistance of the battery pack during the mounting on the vehicle is reduced, and the energy consumption of the vehicle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this description, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are presented by way of example or for purpose of illustration and not limitation.

[0024] Figure 1 A structural schematic view of the battery pack bottom guard plate from one perspective according to an embodiment of the application;

[0025] Figure 2 A structural schematic view of the battery pack bottom guard plate from another perspective according to an embodiment of the application;

[0026] Figure 3 A structural schematic view of the blade and the angle adjusting mechanism according to an embodiment of the application;

[0027] Figure 4 A partial structural schematic view of the blade according to an embodiment of the application;

[0028] Figure 5 An internal structural schematic view of the blade according to an embodiment of the application;

[0029] Figure 6 A partial structural schematic view of the rack according to an embodiment of the application.

[0030] Explanation of the reference signs:

[0031] 1, frame; 2, blade; 3, rack; 4, linear driving part; 5, air bag;

[0032] 200, cavity; 201, rotating shaft; 202, weak area; 203, gear; 301, sliding block. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0034] In the description of the utility model, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "back" appear, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second" appear, they are also used for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] The embodiment relates to a battery pack bottom protection plate, which comprises a frame 1, a plurality of blades 2 rotatably arranged in the frame 1, and an angle adjusting mechanism connected with each blade 2 in transmission, the angle adjusting mechanism is used for adjusting the rotation angle of the blade 2, and the thickness of the blade 2 is gradually reduced along the flow direction of the airflow from inside to outside.

[0037] The battery pack bottom protection plate described in the embodiment adjusts the rotation angle of each blade 2 through the angle adjusting mechanism, which is beneficial to meet the heat dissipation or heat preservation requirements of the battery pack, thereby improving the performance of the battery pack, and through the gradually reduced thickness of the blade 2 along the flow direction of the airflow from inside to outside and the adjustment of the angle of the blade 2, it is beneficial to adjust and reduce the wind resistance of the vehicle during driving, thereby reducing energy consumption.

[0038] Based on the overall introduction as above, an exemplary structure of the battery pack bottom protection plate described in the embodiment is shown in Figure 1 and Figure 2 The frame 1 can be rectangular as shown in Figure 1 , or square or other geometric shapes. The plurality of blades 2 are arranged at intervals along the length direction of the frame 1, and the plurality of blades 2 are parallel to each other. The plurality of blades 2 have a first state of being stacked together to separate the frame 1 into upper and lower parts due to rotation, and a second state of forming an air passage between adjacent two blades 2. Wherein, the flow direction of the airflow from inside to outside is specifically the direction indicated by the arrow in Figure 3 and Figure 5 .

[0039] The blades 2 in this embodiment are arranged in the frame 1 by rotating the rotating shafts 201 at both ends. As a preferred embodiment, as shown in Figure 4 the rotating shafts 201 are arranged at the middle of the end surface of the blades 2, which is conducive to further improving the stability of the blades 2 in rotation. Of course, even if the rotating shafts 201 are arranged at one end of the end surface of the blades 2, the use requirement of the rotation of the blades 2 can be met. In this embodiment, the top and bottom of the blades 2 are circularly arc-shaped, so as to reduce the wind resistance in the second state.

[0040] In the flow direction of the air flow from inside to outside, the thickness of the blades 2 gradually decreases, so that the blades 2 are wing-shaped, and the surface of the blades 2 is streamline-shaped. In the driving process of the vehicle, the streamline-shaped surface of the blades 2 enables the air to flow smoothly, the air can flow gradually backward along the upper and lower surfaces of the blades 2, and the flow rate of the air on the upper surface of the blades 2 is accelerated and the pressure is reduced, while the flow rate of the air on the lower surface of the blades 2 is relatively slow and the pressure is relatively high, so that a pressure difference is generated between the upper and lower surfaces of the blades 2, thereby reducing the air resistance of the blades 2. In addition, the change of the thickness of the blades 2 also helps the air flowing through the blades 2 to leave the blades 2 smoothly, which is also conducive to reducing the generation of vortex.

[0041] Further, in this embodiment, hollow cavities 200 are formed in the blades 2, and at least one of the cavities 200 contains an airbag 5. The airbag 5 is triggered when the external force borne by the blade 2 exceeds a preset threshold, and is ejected at the bottom of the blade 2. Here, the hollow cavities 200 are formed in the blades 2, which provides space for the placement of the airbag 5, and also helps to reduce the weight of the battery pack bottom guard plate, so that the airbag 5 is triggered and ejected when the external force borne by the blade 2 exceeds the preset threshold, which helps to improve the protection effect of the bottom of the battery pack.

[0042] In the case of facing a larger impact force, such as a larger road protrusion impact or a serious stone impact in high-speed driving, ordinary blades 2 may not be able to completely protect the battery pack. At this time, the ejected airbag 5 can provide additional cushioning in an instant, further reducing the damage to the battery pack. For example, when the vehicle passes through a rugged road section at a high speed, the ejection of the airbag 5 can effectively absorb the impact force and reduce the risk of damage to the battery pack.

[0043] As shown in Figure 2 , the airbags 5 are contained in the cavities 200 of two blades 2, of course, the number and position of the blades 2 containing the airbags 5 can be adjusted according to the use requirement. The airbags 5 here can adopt the safety airbags 5 in the prior art, which are contained in the cavities 200 in the storage state. In order to facilitate the ejection of the airbags 5, as shown in Figure 2 and Figure 5As shown, a weak area 202 is provided at the bottom of the blade 2 equipped with the airbag 5. The airbag 5 breaks through the weak area 202 and pops out from the bottom of the blade 2. By setting the weak area 202, the airbag 5 can easily pop out from the bottom of the blade 2, thus ensuring the protective effect after the airbag 5 is deployed.

[0044] In order to facilitate the placement of the airbag 5, a communication port communicating with the cavity 200 is provided at the bottom of the blade 2, and a plug is attached to the bottom of the blade 2 by adhesive to block the communication port. The plug forms a weak area 202. When the airbag 5 is deployed, the adhesive area between the plug and the blade 2 is easily disconnected, so that the airbag 5 can be deployed smoothly.

[0045] To facilitate the triggering of the airbag 5, in a preferred embodiment, at least one blade 2 has a pressure detection unit at its bottom. The pressure detection unit is used to detect the external force borne by the blade 2. The pressure detection unit can detect the external force borne by the blade 2, providing an accurate basis for the triggering of the airbag 5. It can also ensure that the airbag 5 will only deploy when protection is actually needed, avoiding unnecessary triggering and improving the accuracy and reliability of protection.

[0046] The blade 2 with a pressure detection unit is preferably the blade 2 with an airbag 5. The pressure detection unit can be a pressure sensor, which is electrically connected to the control system on the vehicle or battery pack. The control system receives the detection information from the pressure detection unit and sends a trigger information to the airbag 5 when the pressure exceeds a preset threshold, so that the airbag 5 can deploy the blade 2.

[0047] As a preferred implementation method, such as Figure 3 and Figure 4 As shown, the angle adjustment mechanism includes a gear 203 mounted on a rotating shaft 201 and a rack 3 slidably mounted on a frame 1 along a first direction. The rack 3 is connected to the gear 203 and drives each blade 2 to rotate via the gear 203. The first direction is perpendicular to the axial direction of the rotating shaft 201. Here, the linear motion of the rack 3 is converted into the rotational motion of the blade 2 through the gear 203. This transmission method has high transmission efficiency and precision, ensuring accurate adjustment of the blade 2 angle. Simultaneously, the precise sliding of the rack 3 on the frame 1 allows for fine adjustment of the blade 2 angle.

[0048] Furthermore, the transmission connection between rack 3 and gear 203 is a reliable mechanical transmission method. The linear motion of rack 3 is converted into the rotational motion of blade 2 through gear 203. This transmission method has high transmission efficiency and precision, ensuring accurate adjustment of the blade 2 angle. When the vehicle is in motion, blade 2 can be adjusted to a specific angle to reduce air resistance and increase the vehicle's range. When traversing rough roads, the blade 2 angle can be adjusted to enhance the protection of the battery pack.

[0049] To further improve the angle adjustment effect of the blade 2, in this embodiment, a guide part is provided between the rack 3 and the frame 1, which guides the rack 3 to slide in the first direction. The guide part makes the rack 3 slide only in the first direction, making the transmission between the rack 3 and the gear 203 more accurate. Specifically, the guide part can strictly limit the movement direction of the rack 3, making the transmission between the rack 3 and the gear 203 more accurate. In this way, the rotation angle of the blade 2 can be more accurately controlled to meet the strict requirements of the battery pack bottom guard plate angle under different driving conditions. At the same time, by ensuring the smooth sliding of the rack 3, the guide part can reduce the wear between the rack 3 and the frame 1. This not only reduces maintenance costs, but also prolongs the service life of the battery pack bottom guard plate. At the same time, reducing wear also helps to maintain the accuracy and performance of the angle adjustment mechanism.

[0050] As a preferred structure example, as shown in Figure 6 The guide part includes a sliding block 301 provided on the rack 3 and a sliding groove provided on the frame 1 in the first direction, and the sliding block 301 is slidingly arranged in the sliding groove. The sliding block 301 is arranged on both sides of the rack 3, and the sliding groove is arranged on the frame 1 in the first direction. By slidingly arranging the sliding block 301 in the sliding groove, the rack 3 can be effectively prevented from shaking or deviating during sliding. Among them, since the sliding block 301 is limited to move in the sliding groove, this structure can effectively prevent the rack 3 from shaking or deviating during sliding. Even if the vehicle is subjected to vibration and impact during driving, the stable sliding of the rack 3 can be maintained, thereby improving the stability of the entire bottom guard plate.

[0051] In addition, the structure of the guide part is relatively simple, consisting of a sliding block 301 and a sliding groove, without complex mechanical parts. This makes it highly reliable and less prone to failure. At the same time, the simple structure also facilitates manufacturing and installation, reducing production costs.

[0052] To further improve the performance of the angle adjustment mechanism, the angle adjustment mechanism further includes a linear drive part 4, the power output end of the linear drive part 4 is connected to one end of the rack 3, and drives the rack 3 to slide in the first direction. The linear drive part 4 drives the rack 3 to move by generating linear motion, which is beneficial to improve the convenience of sliding the rack 3. This linear drive part 4 makes the adjustment of the angle of the blade 2 can be automated.

[0053] In this embodiment, the linear driving part 4 is connected with the electronic control system of the vehicle, so that the angle of the blade 2 can be automatically adjusted according to different driving conditions and requirements, thereby improving the adaptability and convenience of the underbody protection plate. When driving at high speed, the electronic control system of the vehicle can automatically adjust the angle of the blade 2 to reduce air resistance and improve the cruising range; when passing through rough road, the angle can also be automatically adjusted to enhance the protection of the battery pack. The linear driving part 4 can adopt a cylinder in the prior art.

[0054] In addition, the angle adjusting mechanism is provided at both ends of each blade 2. By providing two angle adjusting mechanisms, the stability of the angle adjustment of the blade 2 can be improved. When a larger external force impact is encountered, the angle adjusting mechanisms at both ends can work simultaneously to quickly adjust the angle of the blade 2 and enhance the protection of the battery pack. The two angle adjusting mechanisms can effectively reduce the shaking and vibration of the blade 2 during rotation. Since both ends are subjected to force at the same time, the movement of the blade 2 is more stable, thereby improving the stability and reliability of the entire underbody protection plate.

[0055] As a preferred embodiment, the frame 1 is provided with a mounting cavity, and the angle adjusting mechanism is arranged in the mounting cavity. The provision of the mounting cavity in the frame 1 provides a special mounting space for the angle adjusting mechanism, so that the structure of the underbody protection plate is more compact, the occupation of external space is reduced, and the angle adjusting mechanism is also protected to a certain extent.

[0056] When designing the mounting cavity, the size and layout of the angle adjusting mechanism should be fully considered to ensure that the mounting cavity can reasonably accommodate the angle adjusting mechanism without affecting other functions of the underbody protection plate. By arranging the angle adjusting mechanism in the mounting cavity, the appearance of the underbody protection plate is more neat and beautiful. From the outside, the complex mechanical structure cannot be seen, and the overall visual effect of the vehicle bottom is improved.

[0057] The battery pack underbody protection plate of the embodiment is beneficial to reduce wind resistance by optimizing the structure of the blade 2, and the angle adjustment of the blade 2 is more smooth by optimizing the angle adjusting mechanism, so that the use flexibility is higher, thereby improving the use performance of the battery pack.

[0058] In addition, the embodiment also relates to a battery pack, which comprises a battery pack lower shell, and the battery pack lower shell is provided with the battery pack underbody protection plate as described above.

[0059] The battery pack of the embodiment is beneficial to improve the use performance and safety of the battery pack by being provided with the battery pack underbody protection plate as described above.

[0060] The above description is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery pack bottom protection plate, characterized in that: It includes a frame, multiple blades rotatably disposed within the frame, and an angle adjustment mechanism that is tractively connected to each blade. The angle adjustment mechanism is used to adjust the rotation angle of the blades, and the thickness of the blades is gradually reduced along the airflow direction from the inside to the outside.

2. The battery pack bottom protective plate according to claim 1, characterized in that: Each of the blades has a hollow cavity formed therein, and at least one of the cavities contains an air bladder; The airbag is triggered when the external force on the blade exceeds a preset threshold, and then pops out from the bottom of the blade.

3. The battery pack bottom protective plate according to claim 2, characterized in that: The blade has a weak area at its base, and the airbag breaks through the weak area to eject the blade from its base; and / or, At least one of the blades has a pressure detection unit at its bottom, which is used to detect the external force borne by the blade.

4. The battery pack bottom protective plate according to claim 1, characterized in that: Each of the blades is rotatably mounted within the frame via pivots at both ends; The angle adjustment mechanism includes a gear mounted on one of its rotating shafts and a rack slidably mounted on the frame along a first direction. The rack is connected to the gear and drives each of the blades to rotate through the gear. The first direction is perpendicular to the axial direction of the rotating shaft.

5. The battery pack bottom protective plate according to claim 4, characterized in that: A guide portion is provided between the rack and the frame, and the guide portion is used to guide the rack to slide along the first direction.

6. The battery pack bottom protective plate according to claim 5, characterized in that: The guide portion includes a slider disposed on the rack and a groove extending along the first direction on the frame, wherein the slider is slidably disposed within the groove.

7. The battery pack bottom protective plate according to claim 4, characterized in that: The angle adjustment mechanism further includes a linear drive unit, the power output end of which is connected to one end of the rack and drives the rack to slide along the first direction.

8. The battery pack bottom protective plate according to claim 4, characterized in that: The angle adjustment mechanism consists of two parts, one for each end of the blade.

9. The battery pack bottom protective plate according to claim 1, characterized in that: The frame has a mounting cavity, and the angle adjustment mechanism is located inside the mounting cavity.

10. A battery pack, characterized in that: Includes the battery pack bottom cover plate according to any one of claims 1 to 9.

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