Battery pack protection structure

Abstract

The utility model relates to a battery pack protection structure, including battery pack shell, a side plate of battery pack shell is equipped with a plurality of air grooves, the sand prevention mechanism of battery pack shell inside corresponds with air groove, sand prevention mechanism includes guide piece and sand baffle, guide piece one end is connected with the side plate, and the junction of guide piece and side plate is aligned with the one side of air groove close to the bottom plate of battery pack shell, and the end of guide piece away from the side plate is inclined to the direction of the top plate of battery pack shell, and the projection of guide piece covers air groove in horizontal direction, and sand baffle is located between the side plate and guide piece, and sand baffle is connected with the end away from the side plate of guide piece, and sand baffle and the side plate leave the air gap between. Through guide piece deceleration separation sand dust, sand baffle intercepts sand dust, can effectively prevent sand dust from invading the inside of battery pack, avoids the blockage heat dissipation channel, and simultaneously, the air gap of air groove and sand baffle guarantees the air circulation, maintains the heat dissipation efficiency of battery pack.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and specifically relates to a battery pack protection structure. Background Technology

[0002] The battery pack is the core energy storage component of an electric vehicle, directly determining its range, power output, and operational safety. It provides continuous electrical support for vehicle operation and is a crucial guarantee for the normal functioning of electric vehicles. With the continuous maturation and improvement of electric vehicle technology, its application scenarios have gradually expanded from traditional urban roads to complex road conditions such as off-road driving and deserts, covering diverse needs such as outdoor exploration and field transportation, effectively breaking the limitations of traditional electric vehicles in terms of application scenarios.

[0003] However, in windy and dusty road conditions (such as when off-road driving, wheels easily kick up large amounts of sand and dust, and in desert and Gobi areas where high concentrations of dust are present for a long time), electric vehicle battery packs face a serious problem of sand and dust intrusion. The protective structure of existing battery packs is mostly designed for urban road environments, focusing on waterproofing and protection against minor collisions. They lack the ability to specifically block high concentrations of sand and dust. Under long-term operation, sand and dust can easily intrude into the battery pack through ventilation gaps and accumulate in key areas such as cell gaps, heat dissipation ducts, and electrical connection terminals.

[0004] Accumulated sand and dust can clog the heat dissipation channels of the battery pack, hindering air circulation and the circulation of the heat dissipation medium. This prevents the heat generated by the battery during operation from being dissipated in a timely manner, resulting in a significant decrease in the overall heat dissipation effect of the battery pack. Consequently, this leads to an abnormal increase in the temperature of the battery cells, which not only reduces the charging and discharging efficiency of the battery but also accelerates the aging of the cells. In addition, the conductivity and abrasiveness of sand and dust particles may damage the internal insulation structure of the battery pack, exacerbating the corrosion and poor contact of electrical components. In severe cases, it may even cause safety hazards such as short circuits and leakage, which not only shortens the service life of the battery pack but also threatens the driving safety of electric vehicles. Utility Model Content

[0005] The purpose of this invention is to provide a battery pack protection structure to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: A battery pack protective structure includes a battery pack housing, characterized in that: a plurality of ventilation slots parallel to the bottom plate of the battery pack housing are provided on one side plate of the battery pack housing, and a plurality of sand-proof mechanisms corresponding to each of the ventilation slots are provided inside the battery pack housing; The sand-proof mechanism includes a guide plate and a sand-blocking plate. One end of the guide plate is connected to the side plate, and the connection between the guide plate and the side plate is aligned with the side of the ventilation groove near the bottom plate of the battery pack housing. The end of the guide plate away from the side plate is inclined towards the top plate of the battery pack housing, and the projection of the guide plate in the horizontal direction covers the ventilation groove. The sand-blocking plate is located between the side plate and the guide plate, and the sand-blocking plate is connected to the end of the guide plate away from the side plate. A ventilation gap is left between the sand-blocking plate and the side plate.

[0007] Optionally, the guide piece is arc-shaped.

[0008] Optionally, the sand-blocking plate is arranged perpendicular to the side plate.

[0009] Optionally, the guide plate and the sand-blocking plate are provided with connecting plates between the side plate and both sides of the ventilation groove along its length.

[0010] Optionally, the sand-prevention mechanism further includes a cleaning component; The cleaning component includes: A sliding rod is mounted on the sand-blocking plate; The slider is slidably fitted onto the slider rod; The cleaning plate is shaped to match the guide plate, and the cleaning plate slides against the side of the guide plate near the ventilation groove. One end of the cleaning plate is connected to the slider.

[0011] Optionally, the cleaning blades are arranged with blades on both sides along the length of the ventilation groove.

[0012] Optionally, the slider is made of stainless steel and the weight of the slider is greater than or equal to grams.

[0013] The beneficial effects of this utility model are: By using guide plates to slow down and separate sand and dust and sand-blocking plates to intercept sand and dust, it is possible to effectively prevent sand and dust from entering the battery pack and avoid blocking the heat dissipation channels. At the same time, the ventilation slots and ventilation gaps of the sand-blocking plates ensure air circulation, maintain the heat dissipation efficiency of the battery pack, and solve the pain point of "difficulty in balancing sand prevention and heat dissipation".

[0014] The cleaning component relies on the vehicle's inertia while driving in the field (the slider weight is ≥50 grams to ensure power) to drive the dust removal blade to automatically scrape away the sand and dust from the guide plate. No additional power or manual cleaning is required, making it suitable for working conditions where maintenance is inconvenient in the field.

[0015] The slider is made of stainless steel, which is resistant to sand and dust wear and corrosion; the blade design of the dust removal blade enhances the thoroughness of sand removal. Both of these improve the long-term reliability of the structure and meet the long-term use requirements of electric vehicles in outdoor sandy environments. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the battery pack shell of the present invention, which is a battery pack protection structure. Figure 2 This is a schematic diagram of the side plate of a battery pack protective structure according to the present invention; Figure 3 This is a partial cross-sectional structural diagram of the side plate of a battery pack protective structure according to the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a partial cross-sectional side view of the side plate of a battery pack protective structure according to the present invention; Figure 6 This is a schematic diagram of the structure of the dust removal sheet of the battery pack protection structure of this utility model; The symbols for the main components are explained below: Battery pack housing 101, side plate 102, ventilation groove 103, guide plate 201, sand baffle 202, connecting plate 203, slide rod 301, slider 302, and dust removal plate 303. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] like Figure 1-6 As shown, a battery pack protection structure includes a battery pack housing 101, characterized in that: a plurality of ventilation slots 103 parallel to the bottom plate of the battery pack housing 101 are provided on a side plate 102 of the battery pack housing 101, and a plurality of sand-proof mechanisms corresponding to each ventilation slot 103 are provided inside the battery pack housing 101. The sand-proof mechanism includes a guide plate 201 and a sand-blocking plate 202. One end of the guide plate 201 is connected to the side plate 102, and the connection between the guide plate 201 and the side plate 102 is aligned with the side of the ventilation channel 103 near the bottom plate of the battery pack housing 101. The end of the guide plate 201 away from the side plate 102 is inclined towards the top plate of the battery pack housing 101, and the projection of the guide plate 201 in the horizontal direction covers the ventilation channel 103. The sand-blocking plate 202 is located between the side plate 102 and the guide plate 201, and the sand-blocking plate 202 is connected to the end of the guide plate 201 away from the side plate 102. A ventilation gap is left between the sand-blocking plate 202 and the side plate 102.

[0020] The battery pack housing 101, as the core of the entire protective structure, is a closed box structure, including a bottom plate, a top plate, and side plates (including side plate 102). The interior is used to house key components such as the battery cells and electrode assemblies. It bears the dual functions of load-bearing and basic protection. On the one hand, it provides a stable installation space for the battery cells, preventing them from being directly affected by external impacts and vibrations; on the other hand, the box structure isolates impurities such as sand and rainwater from the external environment, serving as the installation reference framework for all subsequent protective and ventilation components.

[0021] The side plate 102 is a side component of the battery pack housing 101, and is vertically connected to the bottom plate and top plate of the housing. It is the direct mounting carrier for the ventilation slot 103 and the sand-proof mechanism (guide plate 201, sand-blocking plate 202). It serves as a "connecting bridge" to provide the opening position for the ventilation slot 103. At the same time, it fixes the guide plate 201 through welding, bolting and other methods to ensure that the ventilation slot and the sand-proof mechanism are accurately aligned. It can also work with other parts of the housing to enhance the sealing and prevent sand and dust from entering through the connection gap between the side plate and other components. Moreover, it ensures the opening accuracy of the ventilation slot 103 (such as in the direction parallel to the bottom plate) with its own planar structure and structural strength, and prevents the airflow from bypassing the sand-proof mechanism due to component misalignment.

[0022] Ventilation slots 103 are formed on the side plate 102, and there are multiple slots. The length direction of each ventilation slot is parallel to the bottom plate of the battery pack housing 101, and they form a one-to-one correspondence with the subsequent sand-proof mechanism. Its core function is to create a dedicated channel for air circulation inside and outside the battery pack housing 101 to meet the heat dissipation requirements of the battery core. After the heat generated by the battery operation raises the temperature of the air inside the housing, the low-temperature air from the outside can enter the housing through the ventilation slots, exchange with the high-temperature air, and carry away the heat to maintain the safe temperature of the core. The opening direction parallel to the bottom plate can guide the airflow to enter stably in the horizontal direction, avoiding the fluctuation of heat dissipation efficiency caused by chaotic airflow direction. The multiple slots and the design corresponding to the sand-proof mechanism ensure that each incoming airflow can undergo targeted sand-proof treatment, preventing unfiltered sand-containing airflow from directly entering the housing.

[0023] One end of the guide plate 201 is fixedly connected to the side plate 102 (the connection point is aligned with the side of the ventilation slot 103 near the bottom plate of the battery pack housing 101), and the other end extends obliquely towards the top plate of the housing, and its horizontal projection can completely cover the corresponding ventilation slot 103; it mainly realizes the directional guidance and deceleration of the sand-containing airflow, creating conditions for the initial separation of sand and dust from air. The principle is that: the position of the connection point and the ventilation slot ensures that the sand-containing airflow flowing out of the ventilation slot can directly contact the guide plate, and there is no dead corner for the airflow; the oblique extension direction towards the top plate forces the originally horizontally entering airflow to "flow upward obliquely". The airflow is decelerated due to the increased internal space resistance of the housing. Since the density of sand and dust is much greater than that of air, it is difficult to "climb upward" with the airflow after deceleration, and it will gradually settle on the surface of the guide plate under the action of gravity; the horizontal projection covering the ventilation slot further ensures that all airflow entering from the ventilation slot must be guided by the guide plate, ensuring comprehensive sand prevention.

[0024] The sand-blocking plate 202 is located in the gap between the side plate 102 and the guide plate 201. One end is fixedly connected to the end of the guide plate 201 away from the side plate 102, and the other end does not contact the side plate 102 and leaves a ventilation gap. It undertakes the dual functions of final sand and dust interception and clean airflow guidance. The principle is that its position is set to receive the airflow after it has been slowed down by the guide plate and directly intercept the sand and dust that has not yet settled in the airflow (especially sand and dust with slightly larger particles), so as to prevent the sand and dust from spreading into the shell. The ventilation gap between it and the side plate 102 provides a flow channel for the clean air that has been decelerated and separated from the sand and dust. It does not block the airflow required for heat dissipation and ensures that the air entering the shell is free of sand and dust impurities. Moreover, it forms a "guidance-interception" cooperative structure through its connection with the guide plate 201. The guide plate is responsible for the airflow deceleration and initial separation of sand and dust, and the sand-blocking plate is responsible for the final blocking of sand and dust. The two work together to greatly improve the sand and dust blocking efficiency, while retaining the heat dissipation function.

[0025] Furthermore, the guide piece 201 is designed in an arc shape.

[0026] Its function is to optimize airflow smoothness, improve the stability of sand and dust settling, and reduce airflow resistance and turbulence interference. The principle is as follows: the arc-shaped structure avoids turbulence caused by the broken path of airflow, prevents the re-rolling of settled sand and dust, and reduces noise; the arc-shaped surface allows sand and dust to settle smoothly along the surface, reducing residue; at the same time, it reduces airflow resistance, ensures heat dissipation and ventilation efficiency, and works in conjunction with the ventilation slot 103 and the sand-blocking plate 202 to enhance the reliability of wind and sand protection in the field.

[0027] Furthermore, the sand-blocking plate 202 is set perpendicular to the side plate 102.

[0028] Its function is to enhance the targeted interception of sand and dust while ensuring uniform ventilation gaps. The principle is as follows: the vertical arrangement ensures that the blocking surface of the sand-blocking plate 202 faces the airflow coming from the guide plate 201, directly intercepting unsettled sand and dust and preventing the airflow from bypassing the sand-blocking plate; furthermore, the vertical structure ensures consistent ventilation gap width, guaranteeing smooth airflow without affecting heat dissipation. In conjunction with the guide plate 201 and ventilation slot 103, it further enhances the reliability of sand protection in windy and sandy environments in the field.

[0029] Furthermore, the guide plate 201 and the sand-blocking plate 202 are provided with connecting plates 203 between the side plate 102 and both sides of the ventilation groove 103 along its length.

[0030] Located on both sides of the ventilation slot 103 along its length, connecting the guide plate 201, the sand-blocking plate 202, and the side plate 102, its core function is to reinforce the structural stability of the sand-proof mechanism and block the side leakage channels of sand and dust. The principle is that the connecting plates on both sides can connect the guide plate, the sand-blocking plate, and the side plate into a whole, improving the ability to resist vehicle bumps and vibrations in the wild and preventing component misalignment; at the same time, it seals the side gaps between the guide plate, the sand-blocking plate, and the side plate, forcing the sand-laden airflow to flow only along the path of guide plate → sand-blocking plate → ventilation gap, preventing sand and dust from entering the shell from the side; and it does not affect the normal airflow through the ventilation gap, working together with the guide plate and the sand-blocking plate to enhance the reliability of sand prevention.

[0031] Furthermore, the sand control mechanism also includes a cleaning component; the cleaning component includes: a sliding rod 301, which is disposed on the sand-blocking plate 202; a slider 302, which is slidably sleeved on the sliding rod 301; and a dust-removing plate 303, which matches the shape of the guide plate 201, and the dust-removing plate 303 slides against the side of the guide plate 201 near the ventilation groove 103, and one end of the dust-removing plate 303 is connected to the slider 302.

[0032] The slide bar 301 is a long, narrow rod structure, fixedly mounted on the sand-blocking plate 202. Its installation direction is strictly consistent with the length direction of the ventilation groove 103, and the length of the rod must cover the entire length of the guide plate 201 within the ventilation groove 103. Its core function is to provide a stable sliding track for the slide bar 302, limiting its movement path and ensuring that subsequent dust removal operations can cover the sand and dust accumulation area on the guide plate 201. The necessity of the installation direction is that the guide plate 201 corresponds one-to-one with the ventilation groove 103, and the accumulation range of sand and dust on the surface of the guide plate 201 is completely coincident with the length direction of the ventilation groove 103. If the installation direction of the slider 301 deviates from the length direction of the ventilation groove 103, the sliding trajectory of the slider 302 will not match the sand and dust accumulation range, resulting in cleaning dead corners, causing sand and dust residue to accumulate in some areas, and thus blocking the airflow channel. Only when it is consistent with the length direction of the ventilation groove 103 can the slider 302 drive the dust removal plate 303 to completely cover the sand and dust area of ​​the guide plate 201, ensuring that there are no omissions in the cleaning.

[0033] The slider 302 has a block or ring-shaped structure and is tightly fitted onto the slide rod 301 through a sliding engagement between its inner wall and the outer wall. It can slide freely along the length of the slide rod 301 (in this embodiment, the length direction of the side plate 102 with the ventilation slot 103 is consistent with the length direction of the vehicle). Its function is to act as a power transmission carrier, transmitting the force generated by the vehicle during off-road driving to the cleaning plate 303, driving the cleaning plate 303 to complete the cleaning action. This eliminates the need for additional power components such as motors and springs, simplifying the structure and reducing energy consumption. The necessity of its sliding direction is determined by the installation direction of the slide rod 301: since the slide rod 301 is aligned with the length direction of the ventilation groove 103, the sliding direction of the slider 302 along the slide rod 301 naturally matches the sand and dust accumulation direction of the guide plate 201. This ensures that the slider 302 can drive the cleaning plate 303 to move back and forth along the core area of ​​sand and dust accumulation under conditions such as vehicle bumps, uphill, and downhill. If the sliding direction of the slider 302 deviates, even if the direction of the slide rod 301 is correct, the cleaning plate 303 will not be able to accurately reach the sand and dust area, thus losing its cleaning significance.

[0034] The overall shape of the dust removal plate 303 perfectly matches that of the guide plate 201. One side of its surface is tightly fitted with the side of the guide plate 201 near the ventilation groove 103, forming a sliding contact relationship. One end is fixedly connected to the slider 302 and moves synchronously with the slider 302. Its core function is to directly contact the sand and dust trapped on the surface of the guide plate 201 and scrape it off through sliding motion, preventing sand and dust from accumulating and blocking the airflow channel between the guide plate 201 and the sand-blocking plate 202, thus maintaining the function of the guide plate 201 in slowing down and settling the sand-laden airflow. The necessity of its movement direction is reflected in the following: Since the cleaning plate 303 is fixedly connected to the slider 302, when the slider 302 slides along the slide rod 301 which is "consistent with the length direction of the ventilation groove 103", the movement direction of the cleaning plate 303 also corresponds to the sand and dust accumulation direction of the guide plate 201, and can thoroughly scrape away the sand and dust along the extension direction of the sand and dust accumulation; if the movement direction is misaligned, the cleaning plate 303 may only be able to partially scrape the guide plate 201, causing the sand and dust to be "squeezed and accumulated" rather than "completely removed", which will instead increase the risk of airflow channel blockage. Only when it is consistent with the sand and dust accumulation direction can efficient cleaning be achieved.

[0035] Overall, the sliding rod 301, with its installation direction aligned with the length of the ventilation channel 103, sets a precise path for the entire cleaning operation. The slider 302 slides along the sliding rod 301, ensuring that the power transmission direction matches the sand and dust area. The dust removal plate 303 moves synchronously with the slider 302, achieving comprehensive removal of sand and dust from the guide plate 201. Based on a unified directional design, these three components form a cleaning structure that requires no external power and is suitable for field conditions. Working in conjunction with the "sand and dust settling" function of the guide plate 201 and the "sand and dust interception" function of the sand-blocking plate 202, it avoids sand and dust accumulation that weakens the sand-proof effect while ensuring unobstructed airflow and not affecting the heat dissipation function of the ventilation channel 103, thus meeting the long-term use needs of electric vehicles in windy and sandy environments.

[0036] Furthermore, the cleaning blade 303 is arranged with blades on both sides along the length of the ventilation groove 103.

[0037] As an optimized structural design of the dust removal plate 303, it retains the core features of matching the shape of the guide plate 201, sliding and abutting against the side of the guide plate 201 near the ventilation groove 103, and connecting one end to the slider 302. The key improvement lies in the use of a sharp, blade-like structure design on both sides of the ventilation groove 103 along its length (the edges are thin and have high hardness, possessing a certain scraping ability). The core function of this design is to enhance the thoroughness of sand and dust removal, while reducing the resistance and sand and dust residue during the sliding of the dust removal plate, and preventing sand and dust from accumulating on both sides of the dust removal plate, which would lead to a decrease in cleaning efficiency.

[0038] Furthermore, slider 302 is made of stainless steel, and the weight of slider 302 is greater than or equal to 50 grams.

[0039] In windy and sandy environments, the slider 302 needs to slide along the slide rod 301 for extended periods and is easily exposed to sand and dust (containing fine, hard particles) scraped from the surface of the guide plate 201 and moisture in the air. If ordinary metals (such as iron or aluminum) are used, surface deformation can easily occur due to sand and dust wear, and corrosion and rust can occur due to moisture and impurities in the sand and dust. Deformation will increase the clearance between the slider and the slide rod, causing sliding jamming; rust may cause the slider and the slide rod to stick together, resulting in direct failure. Stainless steel, on the other hand, has excellent corrosion resistance and wear resistance. It can resist rust caused by impurities and moisture in the sand and dust, and reduce surface wear during long-term sliding, maintaining a stable clearance between the slider and the slide rod. This ensures that the slider always slides smoothly along the slide rod and avoids the cleaning component stopping due to material wear.

[0040] The core power source of the slider 302 is the inertia of the vehicle during off-road driving (such as the inertial force generated by bumps, uphill and downhill). It needs to rely on the inertia generated by its own weight to overcome the sliding friction between the slider and the sliding rod, so as to drive the dust removal plate 303 to slide along the guide plate 201. If the weight is too light (such as less than 50 grams), the inertial force is insufficient. When facing slight bumps or gentle slopes, it may not be able to overcome the friction, causing the slider to remain stationary and the dust removal plate to fail to clean. The setting of weight ≥ 50 grams can ensure that the slider can generate sufficient inertial force under various off-road conditions (including slight bumps, gentle uphill / downhill), slide smoothly along the sliding rod, and thus drive the dust removal plate to continuously scrape the sand and dust on the surface of the guide plate, avoiding the accumulation of sand and dust due to insufficient power.

[0041] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0042] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0043] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A battery pack protective structure, comprising a battery pack housing, characterized in that: The battery pack housing has multiple ventilation slots parallel to the bottom plate of the battery pack housing on one side plate, and the battery pack housing has multiple sand-proof mechanisms corresponding to each ventilation slot inside the battery pack housing. The sand-proof mechanism includes a guide plate and a sand-blocking plate. One end of the guide plate is connected to the side plate, and the connection between the guide plate and the side plate is aligned with the side of the ventilation groove near the bottom plate of the battery pack housing. The end of the guide plate away from the side plate is inclined towards the top plate of the battery pack housing, and the projection of the guide plate in the horizontal direction covers the ventilation groove. The sand-blocking plate is located between the side plate and the guide plate, and the sand-blocking plate is connected to the end of the guide plate away from the side plate. A ventilation gap is left between the sand-blocking plate and the side plate.

2. The battery pack protection structure according to claim 1, characterized in that: The guide plate is arc-shaped.

3. The battery pack protection structure according to claim 1, characterized in that: The sand-blocking plate is arranged perpendicular to the side plate.

4. The battery pack protection structure according to claim 1, characterized in that: The guide plate and the sand-blocking plate are connected to the side plate on both sides of the ventilation groove along its length.

5. The battery pack protection structure according to claim 1, characterized in that: The sand control mechanism also includes a cleaning component; The cleaning component includes: A sliding rod is mounted on the sand-blocking plate; The slider is slidably fitted onto the slider rod; The cleaning plate is shaped to match the guide plate, and the cleaning plate slides against the side of the guide plate near the ventilation groove. One end of the cleaning plate is connected to the slider.

6. The battery pack protection structure according to claim 5, characterized in that: The cleaning blades are arranged with knife edges on both sides along the length of the ventilation groove.

7. A battery pack protection structure according to claim 5, characterized in that: The slider is made of stainless steel and weighs 50 grams or more.

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