Protective plate, battery pack structure and vehicle

Abstract

The utility model relates to the technical field of batteries, and provides a protection plate, a battery pack structure and a vehicle, the protection plate comprises a protection plate body and a force unloading structure, the force unloading structure is arranged at the edge of the protection plate body, at least one force unloading surface is formed on the force unloading structure, and the extension direction of the force unloading surface is different from the extension direction of the protection plate body. The battery pack structure comprises a box body, a battery cell module, a liquid cooling plate and a protection plate, wherein the protection plate is positioned below the liquid cooling plate. According to the embodiment of the invention, the protection effect of the protection plate on the liquid cooling plate and the battery cell module can be improved, so that the safety performance of the battery pack structure is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a protective shell, a battery pack structure and a vehicle. Background Art

[0002] Currently, battery packs used in vehicles are typically equipped with a protective plate located at the bottom of the battery pack to protect the battery cell modules and liquid cooling plate within the battery pack. The protective plate's simple design makes it difficult to protect the liquid cooling plate and battery cell modules when the vehicle encounters obstacles such as rocks while driving, resulting in limited protection and potential safety hazards. Utility Model Content

[0003] The present application provides a protective plate, a battery pack structure and a vehicle, which can improve the safety performance of the battery pack structure.

[0004] A first aspect of the present application provides a protective plate, comprising:

[0005] protective plate body;

[0006] and a force unloading structure, wherein the force unloading structure is arranged at the edge of the protective plate body, and the force unloading structure forms at least one force unloading surface, and the extension direction of the force unloading surface is different from the extension direction of the protective plate body.

[0007] According to the protective plate described in the first aspect of the present application, a force unloading structure is provided on the edge of the protective plate body. The force unloading surface of the force unloading structure can disperse the impact force outside the protective plate body, thereby improving the impact resistance of the protective plate. When the protective plate is used in a battery pack structure, the safety performance of the battery pack structure is improved.

[0008] In one possible implementation, the protective plate body is a flat plate structure and extends along a first direction, the unloading structure is formed with at least one unloading surface, the unloading surface extends along a second direction, and the first direction and the second direction are not parallel.

[0009] In one possible implementation, the force unloading structure includes a protruding structure protruding from the protective plate body, and at least one side of the protruding structure is inclined to form the force unloading surface.

[0010] In one possible implementation, the protruding structure includes at least one of a bump, a rib, and a ridge.

[0011] In one possible implementation, at least the portion of the force unloading structure that is connected to the protective plate body is made of elastic material.

[0012] In one possible implementation, the protective plate further includes:

[0013] An edge connection portion is formed at the edge of the protective plate body, and a plurality of first mounting holes are provided on the edge connection portion.

[0014] In one possible implementation, a plurality of second mounting holes are provided on the protective plate body.

[0015] In one possible implementation, the protective plate is made of hot-pressed steel.

[0016] In one possible implementation, a carbon nanocoating is provided on the surface of the protective plate.

[0017] A second aspect of the present application provides a battery pack structure, comprising:

[0018] A box body having a mounting cavity;

[0019] A battery cell module is arranged in the installation cavity;

[0020] A liquid cooling plate is arranged in the installation cavity, and the liquid cooling plate is located below the battery cell module;

[0021] And the protective plate described in the first aspect, the protective plate is located below the liquid cooling plate.

[0022] According to the battery pack structure described in the second aspect of the present application, the battery pack structure has excellent safety performance based on the setting of the above-mentioned protective plate. The protective plate can effectively protect the battery cell modules and liquid cooling plates in the battery pack structure, and the battery pack structure has high safety performance.

[0023] In one possible implementation, the battery pack structure further includes:

[0024] A fastening connector is connected between the box and the liquid cooling plate and can form a connecting end on the liquid cooling plate, and the protective plate is connected to the connecting end.

[0025] In one possible implementation, the fastening connector includes a large-flange rivet nut, and the large-flange rivet nut includes a connecting head, which forms the connecting end.

[0026] In one possible implementation, the battery pack structure further includes:

[0027] An anti-collision block is installed on the box body and connected to the force unloading structure in the protective plate.

[0028] In one possible implementation, a first reinforcing rib is formed inside the anti-collision block, and a second reinforcing rib is formed inside the liquid cooling plate. The extending direction of the first reinforcing rib is the same as the extending direction of the second reinforcing rib.

[0029] A third aspect of the present application provides a vehicle comprising the battery pack structure described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0031] Figure 1 A schematic structural diagram of a battery pack structure provided according to an embodiment of the present application is shown;

[0032] Figure 2 An exploded schematic diagram of a battery pack structure provided according to an embodiment of the present application is shown;

[0033] Figure 3 An exploded schematic diagram of a battery pack structure provided according to an embodiment of the present application is shown;

[0034] Figure 4 A schematic structural diagram of an anti-collision block provided according to an embodiment of the present application is shown;

[0035] Figure 5 A schematic structural diagram of a protective plate provided according to an embodiment of the present application is shown.

[0036] Reference numerals:

[0037] 100- cabinet; 110- frame; 111- recessed area;

[0038] 300-Liquid cooling plate; 310-Liquid flow channel; 320-Water inlet and outlet;

[0039] 400 - protective plate; 410 - force unloading structure; 420 - protective plate body; 430 - edge connection portion; 411 - force unloading surface; 421 - second mounting hole; 431 - first mounting hole;

[0040] 500-fastening connector; 510-connecting end; 520-screw;

[0041] 600-anti-collision block; 610-first reinforcement rib; 620-cut reinforcement rib. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] The battery pack structure used in vehicles typically includes a housing, battery cell modules housed within the housing, a liquid cooling plate for dissipating heat from the battery cell modules, and a protective plate to protect the liquid cooling plate and battery cell modules. After the battery pack structure is installed on a vehicle, the various structures within the housing are arranged, from top to bottom, as follows: battery cell modules, liquid cooling plate, and protective plate. The protective plate is located at the very bottom of the battery pack structure. During driving, the vehicle may encounter scraping conditions caused by uneven roads or rocks on the road. The protective plate is usually the first to be impacted, thus protecting the liquid cooling plate and battery cell modules above it.

[0044] The design method of the protective plate in the related technology is relatively simple, and its structural design tends to adopt a regular structure, for example, a rectangular structure, etc. The structural design is simple. When the above-mentioned bottom scraping condition occurs, especially when the impact force is too large, the protective plate is difficult to disperse the impact force, and the protective plate tends to deform. When the deformation is too large, the liquid cooling plate and the battery cell module may be damaged. The protective effect of the protective plate is limited, and there are safety hazards in the battery pack structure.

[0045] Based on the above status quo and problems, an embodiment of the present application provides a protective plate, which can adopt an irregular design method. The edge of the protective plate is designed with a force unloading structure. In the above-mentioned bottom scraping working condition, the impact force first acts on the force unloading structure. The force unloading structure can unload the impact force or disperse it to the rest of the protective plate in time, thereby preventing the protective plate from undergoing large deformation, improving the protective effect of the protective plate on the liquid cooling plate and the battery cell module, and ensuring the safety of the battery structure.

[0046] It can be understood that the force unloading structure can be set at each edge of the protective plate. Based on the consideration of the vehicle's operating characteristics, the bottom scraping condition often occurs at the front end of the protective plate, such as stones scraping the front end of the protective plate. Therefore, in order to save costs and manufacturing difficulty, the force unloading structure can be formed at the front end of the protective plate.

[0047] In addition, the number of force-unloading structures can be set according to actual needs. For example, when the liquid cooling plate is designed to extend outside the box, the water inlet and outlet of the liquid cooling plate are usually also located outside the box. At this time, the force-unloading structure can be set according to the position of the water inlet and outlet, so that the protective plate as a whole can protect the liquid cooling plate of the above design.

[0048] In the following embodiments of the present application, the unloading structure will be mainly described as being set at the front end of the protective plate. However, it can be understood that the unloading structure can also be set at other positions of the protective plate, and the present application does not impose any restrictions on this.

[0049] Based on the protective plate, an embodiment of the present application also provides a battery pack structure, which has excellent safety performance based on the setting of the above-mentioned protective plate. The protective plate can effectively protect the battery cell modules and liquid cooling plates in the battery pack structure, and the battery pack structure has high safety performance.

[0050] The above-mentioned battery structure can be applied to vehicles, which may include new energy vehicles. Based on the battery pack structure, the vehicle has excellent safety performance.

[0051] Figure 1 A schematic structural diagram of a battery pack structure provided according to an embodiment of the present application is shown; Figure 2 An exploded schematic diagram of a battery pack structure provided according to an embodiment of the present application is shown; Figure 3 The exploded diagram of a battery pack structure provided in accordance with an embodiment of the present application is shown. Figures 1 to 3 The battery pack structure includes a box body 100, a battery cell module, a liquid cooling plate 300 and a protective plate 400.

[0052] The housing 100 is a protective shell for the battery pack structure. It typically includes an upper cover and a frame 110 disposed at the edge of the upper cover. To enhance the structural strength of the housing 100, longitudinal beams (not shown) and transverse beams (not shown) are also disposed on the inner side of the upper cover. The housing 100 can be made of a metal material such as aluminum or an aluminum alloy. The housing 100 has an installation cavity in which the battery cell module and the liquid cooling plate 300 can be placed.

[0053] In some cases, the upper cover of the box body 100 can be integrated into the chassis structure of the vehicle, that is, when the vehicle leaves the factory, the upper cover of the box body 100 is configured in the chassis structure, and the rest of the battery structure can be installed on the upper cover as a module unit. The module unit may include a battery cell module, a liquid cooling plate 300 and other structures.

[0054] The battery module includes multiple battery cells, each of which includes a positive electrode sheet, a negative electrode sheet, and a separator. The positive electrode sheets, negative electrode sheets, and separators are spaced and stacked to form a battery cell. The battery module in the embodiment of the present application can adopt a square structure, and the multiple battery cells in the battery module are stacked in sequence with their large flat surfaces to form a square structure.

[0055] The function of the liquid cooling plate 300 is to dissipate heat from the battery cell module. A liquid flow channel 310 is formed inside the liquid cooling plate 300. The heat in the battery cell module can be dissipated by the coolant flowing in the liquid flow channel 310.

[0056] The liquid flow channel 310 can be arranged according to the arrangement of the battery cell module. For example, when the battery cell units in the battery cell module are arranged at intervals along the X direction, the liquid flow channel 310 can extend along the X direction. Thus, when the coolant flows in the liquid flow channel 310, the coolant can pass through each battery cell unit to dissipate heat for each battery cell unit.

[0057] In addition, the liquid flow channels 310 can be arranged according to the heat concentration areas of the battery cell module. For example, when the battery cell module is working, heat usually accumulates at the pole ears of the battery cell unit. Based on this, the liquid flow channels 310 corresponding to the pole ears can be arranged more densely so that more coolant can flow to the pole ears, thereby improving the heat dissipation intensity.

[0058] The liquid cooling plate 300 can be attached to the bottom of the battery module, that is, placed below the battery module. In addition, to ensure the heat dissipation effect and allow the coolant to fully cover the battery module, the liquid cooling plate 300 can be designed to extend outside the box 100.

[0059] In the above description, you can combine Figure 1 and Figure 2 The coordinate system in the correct understanding of the meaning of "bottom" and "below" Figure 1 and Figure 2 In the example shown, the position of the box 100 is used as the reference plane, the Z direction represents the thickness direction of the battery pack structure, the X direction represents the length direction of the battery pack structure, and the Y direction represents the width direction of the battery pack structure. Based on this, the bottom and the bottom represent that the features represented have larger Z-axis coordinate values. For example, the liquid cooling plate 300 is located below the battery cell module, which means that the Z-axis coordinate value of the liquid cooling plate 300 is larger, or that the horizontal height of the liquid cooling plate 300 is lower. The protective plate 400 is located below the liquid cooling plate 300, which means that the Z-axis coordinate value of the protective plate 400 is larger, or that the horizontal height of the protective plate 400 is lower.

[0060] The protective plate 400 is located below the liquid cooling plate 300 and can protect the liquid cooling plate 300 and the battery module. The edge of the protective plate 400 is designed with a force unloading structure 410 (such as Figure 5 As shown in the figure, when the vehicle encounters a bottom scraping condition, the impact force first acts on the unloading structure 410. The unloading structure 410 can unload the impact force or disperse it to other parts of the protective plate 400 in time, thereby preventing the protective plate 400 from undergoing significant deformation, thereby improving the protective effect of the protective plate 400 on the liquid cooling plate 300 and the battery cell module, and ensuring the safety of the battery structure.

[0061] The battery pack structure in the related art usually adopts rotary tapping and riveting to fix the liquid cooling plate 300 on the box body 100, for example, on the frame 110, longitudinal beam and cross beam of the aforementioned box body 100. This connection method requires the use of special riveted connectors, and the protective plate 400 is fixed to the box body 100 by rivet nuts. This design method causes the protective plate 400 and the liquid cooling plate 300 to occupy a larger space in the vehicle (the special riveted connectors and rivet nuts need to avoid each other), which is not conducive to forming a high-energy density battery pack structure. In addition, more components are used, which will increase the manufacturing cost of the battery pack structure and reduce the production efficiency of the battery pack structure.

[0062] In this regard, the embodiment of the present application has made changes to the connection method of the liquid cooling plate 300 and the protective plate 400. The main design idea is that after the liquid cooling plate 300 and the protective plate 400 are installed on the box 100, the connecting parts used by each can share at least a part of the space in the vertical space.

[0063] In some embodiments, please refer to Figure 3 The battery pack structure also includes a fastening connector 500, which is connected between the box body 100 and the liquid cooling plate 300. The fastening connector 500 can form a connecting end 510 on the liquid cooling plate 300, and the protective plate 400 is connected to the connecting end 510.

[0064] When assembling the liquid cooling plate 300 and the protective plate 400, the liquid cooling plate 300 can be first installed on the box body 100 through the fastening connector 500. After the liquid cooling plate 300 is installed in place, the protective plate 400 can be further assembled using the connection end 510 formed on the liquid cooling plate 300 by the fastening connector 500. The protective plate 400 can be installed on the connection end 510 by using connectors such as bolts.

[0065] During the above assembly process, it is understood that the fastening connector 500 and connectors such as bolts can share a portion of space in the Z direction, thereby saving space and providing more installation space for the battery cell modules, thereby facilitating the formation of a high-energy-density battery pack structure. Furthermore, during the above assembly process, since connectors such as bolts can be connected to the connection end 510, this connection method reduces the length and number of connectors compared to the method of connecting the protective plate 400 to the box body 100. For example, the bolts can be designed to be shorter and fewer bolts can be used, which helps reduce the manufacturing cost of the battery pack structure and improve production efficiency.

[0066] In some specific embodiments, the fastening connector 500 includes a large flange rivet nut, which includes a connecting head that forms a connecting end 510 .

[0067] The large flange rivet nut includes a screw 520 and a nut head, which forms a connecting head. The nut head has a large size area, so that after connecting the liquid cooling plate 300 to the box body 100, the nut head can form a connecting end 510 with a sufficient installation area.

[0068] It is understandable that the specific size of the nut head can be set according to actual needs. For example, when the structural dimensions of the liquid cooling plate 300 and the protective plate 400 are large and a greater connection force is required, the nut head can be designed to be larger to ensure connection reliability.

[0069] Figure 4 A schematic diagram of the structure of an anti-collision block provided according to an embodiment of the present application is shown. Figure 1 、 Figure 2 and 4 The battery pack structure also includes an anti-collision block 600, which is installed on the box body 100 and connected to the force unloading structure 410 in the protective plate 400.

[0070] In an embodiment where the liquid cooling plate 300 extends out of the box body 100, the position of the anti-collision block 600 can correspond to the portion of the liquid cooling plate 300 extending out of the box body 100. For example, it can be designed to correspond to the water inlet and outlet 320 of the liquid cooling plate 300. The anti-collision block 600 is installed on the box body 100, and the liquid cooling plate 300 is installed at the bottom of the box body 100 and extends out of the box body 100 in the X direction. At this time, it can be understood that when the vehicle encounters a bottom scraping condition, the impact force can first act on the anti-collision block 600. After the anti-collision block 600 offsets part of the impact force, the remaining impact force is transmitted to the unloading structure 410, and the unloading structure 410 then disperses the remaining impact force, thereby forming better protection for the liquid cooling plate 300 and the battery cell module.

[0071] The anti-collision block 600 can be made of a metal material, such as aluminum, aluminum alloy, etc., and can be designed into various structures, such as a rectangular parallelepiped. It is understood that in order to achieve the installation of the anti-collision block 600, the frame 110 of the box body 100 can reserve a recessed area 111, and the recessed area 111 can be adapted to the shape of the anti-collision block 600, so that after the anti-collision block 600 is installed in the recessed area 111, the anti-collision block 600 can remain flush with the surface of the frame 110.

[0072] To better offset the impact force, the anti-collision block 600 can adopt a hollow design structure. When the impact force acts on the anti-collision block 600, based on the hollow design of the anti-collision block 600, the local deformation of the anti-collision block 600 can offset more of the impact force. In addition, the internal structure of the anti-collision block 600 can also be designed to disperse the impact force.

[0073] In some embodiments, please refer to Figure 4 A first reinforcing rib 610 is formed inside the anti-collision block 600. The first reinforcing rib 610 has the function of improving the structural strength of the anti-collision block 600. At the same time, based on the setting of the first reinforcing rib 610, when the anti-collision block 600 is impacted, the first reinforcing rib 610 can form a force transmission channel and share the impact force and transmit it to subsequent positions, such as the aforementioned unloading structure 410.

[0074] Please refer to Figure 2 and Figure 4 The first reinforcing rib 610 is arranged along the length direction of the battery pack structure, that is, the first reinforcing rib 610 is arranged along the X direction. The side of the anti-collision block 600 away from the protective plate 400 is the impact side, and the impact force usually acts on this impact side. When the impact side is affected by the impact force, the first reinforcing rib 610 arranged along the X direction can receive the impact force. In the process of the impact force being transmitted backward along the first reinforcing rib 610, the deformation (which can be elastic deformation) and recovery of the first reinforcing rib 610 can offset part of the impact force, and the remaining impact force is then transmitted to the force unloading structure 410 along the first reinforcing rib 610.

[0075] In some embodiments, please refer to Figure 4 A plurality of first reinforcing ribs 610 are provided inside the anti-collision block 600. The plurality of first reinforcing ribs 610 are arranged at intervals inside the anti-collision block 600. The plurality of first reinforcing ribs 610 can form a plurality of force transmission channels for the impact force, so that the impact force is evenly distributed by the plurality of first reinforcing ribs 610, thereby improving the anti-impact ability of the anti-collision block 600.

[0076] In some embodiments, please refer to Figure 4At least one truncated reinforcement rib 620 is further provided inside the anti-collision block 600 . The truncated reinforcement rib 620 is connected to the first reinforcement rib 610 , and the truncated reinforcement rib 620 extends along the width direction of the battery pack structure.

[0077] Based on the setting of the truncated reinforcement rib 620, the impact resistance of the anti-collision block 600 can be further improved. After the impact force is transmitted to the truncated reinforcement rib 620 along the first reinforcement rib 610, the impact force can continue to be transmitted along the truncated reinforcement rib 620, so that the impact force can be dispersed in the width direction (i.e., the Y direction) of the anti-collision block 600. As a result, when the dynamic anti-collision block 600 is subjected to the impact force, the impact force can be dispersed on the anti-collision block 600 in the length and width directions. As a result, the anti-collision block 600 can absorb more impact force, and less impact force will be transmitted to the unloading structure 410. After the action of the unloading structure 410, this part of the impact force can greatly control the impact on the liquid cooling plate 300 and the battery cell module, and the safety performance of the battery pack structure is further improved.

[0078] In some embodiments, a second reinforcing rib is formed inside the liquid cooling plate 300 , and the extending direction of the second reinforcing rib is the same as the extending direction of the first reinforcing rib 610 .

[0079] The arrangement of the second reinforcing ribs on the liquid cooling plate 300 can provide a safeguard for the battery cell module. When the impact force is too large and the anti-collision block 600 and the protective plate 400 are unable to protect the battery cell module, the liquid cooling plate 300 can first receive more impact force, thereby preventing the impact force from causing damage to the battery cell module.

[0080] Specifically, under certain special bottom-scraping conditions, such as when the bottom structure of the vehicle severely scrapes against the road surface, or when the vehicle is traveling at too high a speed, a strong impact force will be generated, which is likely to directly threaten the battery cell module. In the above embodiment, a second reinforcing rib is formed inside the liquid cooling plate 300, and the extension direction of the second reinforcing rib is the same as the extension direction of the first reinforcing rib 610. The impact force will be dispersed along the second reinforcing rib and onto the liquid cooling plate 300, thereby achieving the purpose of sacrificing the liquid cooling plate 300 in exchange for no damage or less damage to the battery cell module.

[0081] Of course, under normal bottom scraping conditions, the second reinforcing rib will share the impact force with the anti-collision block 600, the force unloading structure 410, etc., which can balance the effect of the impact force on the battery pack structure, thereby improving the overall safety performance of the battery pack structure.

[0082] Figure 5 The schematic diagram of the structure of a protective plate provided in accordance with the embodiment of the present application is shown. Figure 1 、 Figure 2 and Figure 5 The protective plate 400 includes a protective plate body 420 and a force unloading structure 410 .

[0083] The protective plate body 420 is the main structure of the protective plate 400 and can have the same structure as the protective plate 400 in the related art, such as a rectangular parallelepiped structure. Of course, it is understood that the protective plate body 420 in the embodiment of the present application can also adopt other structures. For example, the edge of the protective plate body 420, excluding the area where the force-releasing structure 410 is provided, can be designed as an arc structure, and the internal area of ​​the protective plate body 420 can be provided with structures similar to the first reinforcing rib 610 and the truncated reinforcing rib 620 described above.

[0084] The unloading structure 410 is arranged at the edge of the protective plate body 420. Combined with the foregoing, the unloading structure 410 can be arranged on one edge of the protective plate body 420, or on multiple edges of the protective plate body 420. The unloading structure 410 is formed with at least one unloading surface 411, and the extension direction of the unloading surface 411 is different from the extension direction of the protective plate body 420.

[0085] It is understood that when the shield body 420 is impacted, the impact force will spread to the interior of the shield body 420. If the impact force is too great, the shield body 420 will be damaged, and in severe cases, it may even fail. The unloading structure 410 is equivalent to adding a protective structure to the front end of the shield body 420. After the impact force acts on the unloading structure 410, the unloading surface 411 will disperse the impact force in other directions. This dispersed impact force will no longer act on the shield body 420, thereby enhancing the protective effect of the shield body 420.

[0086] The protective plate 400 in the embodiment of the present application is equipped with a force-unloading structure 410 at the edge of the protective plate body 420. The force-unloading surface 411 of the force-unloading structure 410 can disperse the impact force outside the protective plate body 420, thereby improving the impact resistance of the protective plate 400. When the protective plate 400 is used in a battery pack structure, the safety performance of the battery pack structure is improved.

[0087] In some embodiments, please refer to Figure 5 The protective plate body 420 is a flat plate structure and extends along the first direction. The unloading structure 410 is formed with at least one unloading surface 411. The unloading surface 411 extends along the second direction. The first direction and the second direction are not parallel.

[0088] It can be understood that the unloading structure 410 can be designed as a solid structure. When the impact force acts on the unloading structure 410, because the unloading structure 410 has at least one unloading surface 411 extending along the second direction, at least a part of the impact force can be dispersed in a manner staggered with the protective plate body 420, thereby weakening the impact of the impact force on the protective plate body 420.

[0089] Of course, in some embodiments, the force unloading structure 410 may also be designed as a hollow structure, and the hollow force unloading structure 410 may also disperse part of the impact force outside the protective plate body 420 .

[0090] Furthermore, when the unloading structure 410 adopts a hollow structure, a structure similar to the aforementioned first reinforcing rib 610 and truncated reinforcing rib 620 may be provided inside the unloading structure 410 .

[0091] In some embodiments, please refer to Figure 5 The unloading structure 410 includes a protruding structure protruding from the protective plate body 420 , and at least one side of the protruding structure is inclined to form a unloading surface 411 .

[0092] The protruding structure can be integrated with the protective plate body 420, or can be connected to the protective plate body 420 through a mechanical connection process. Here, setting the force unloading structure 410 as a protruding structure can reduce the difficulty of manufacturing the force unloading structure 410.

[0093] In some embodiments, the raised structure includes at least one of a bump, a rib, and a ridge.

[0094] In some embodiments, the cross-section of the raised structure may be square, triangular, or polygonal.

[0095] In the above embodiment, the unloading surface 411 can be a plane or a curved surface. It can be understood that when the unloading surface 411 is a curved surface, the extension direction of the unloading surface 411 can be understood as the tangent direction of the curved surface.

[0096] In some embodiments, at least the portion of the force unloading structure 410 that needs to be connected to the protective plate body 420 is made of elastic material.

[0097] The portion of the force unloading structure 410 made of elastic material can consume the impact force, thereby enabling less impact force to be transmitted to the protective plate body 420 .

[0098] In other embodiments, the force unloading structure 410 may include an elastic structure connected to the protective plate body 420 .

[0099] In some embodiments, please refer to Figure 1 and5 The protective plate 400 further includes an edge connecting portion 430 formed at an edge of the protective plate body 420 , and a plurality of first mounting holes 431 are provided on the edge connecting portion 430 .

[0100] The first mounting hole 431 corresponds to the position of the frame 110 of the box body 100. After the liquid cooling plate 300 is installed on the frame 110 through the aforementioned fastening connector 500, the protective plate 400 can be installed by passing bolts through the first mounting hole 431 and the aforementioned connecting end 510.

[0101] In some embodiments, to improve connection reliability, please refer to Figure 1 A second mounting hole 421 is further provided on the protective plate body 420. The second mounting hole 421 corresponds to the position of the crossbeam and longitudinal beam of the box body 100. After the liquid cooling plate 300 is installed on the crossbeam and longitudinal beam through the aforementioned fastening connector 500, the protective plate 400 can be installed by passing bolts through the second mounting hole 421 and the aforementioned connecting end 510.

[0102] In related technologies, the protective plate 400 is usually formed of a stamped steel plate, which has limited structural strength, so that the protective effect of the protective plate 400 on the battery module and the liquid cooling plate 300 is limited. When facing the aforementioned special bottom scraping working conditions, the impact force can easily cause the protective plate 400 to deform, and then squeeze the liquid cooling plate 300 and destroy the liquid flow channel 310, which may further lead to the battery module being invaded, causing thermal runaway of the battery module, and posing a great safety risk.

[0103] In this regard, in the embodiment of the present application, the protective plate 400 is made of hot-pressed steel, the yield strength of which can reach 1500 MPa, which can withstand impacts and collisions of large energy, ensure that the battery module is in a safe environment, and improve the safety of the entire vehicle.

[0104] On the other hand, the outer surface of the protective plate 400 in the related art is usually sprayed with a certain thickness of polyvinyl chloride coating (PVC coating) to ensure the structural strength and corrosion resistance of the protective plate 400. Under the scraping condition, the PVC coating is easy to fall off from the protective plate 400, thereby affecting the structural strength and corrosion resistance of the protective plate 400.

[0105] In this regard, in an embodiment of the present application, a carbon nanocoating is provided on the surface of the protective plate 400. As verified by a bottom impact test, compared with a PVC coating, at the same thickness, the carbon nanocoating has better impact resistance and overall stiffness than a PVC coating, and the carbon nanocoating is not easy to fall off from the protective plate 400, thereby improving the structural strength and corrosion resistance of the protective plate 400.

[0106] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0107] In the description of this application, it should be understood that the terms "including" and "having" and any variations thereof used in the embodiments of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or apparatuses.

[0108] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration. They can be directly connected or indirectly connected through an intermediate medium. They can also refer to internal connections between two elements or interactions between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A protective plate, characterized in that: include: protective plate body; and a force unloading structure, wherein the force unloading structure is arranged at the edge of the protective plate body, and the force unloading structure forms at least one force unloading surface, and the extension direction of the force unloading surface is different from the extension direction of the protective plate body.

2. The protective plate according to claim 1, characterized in that The protective plate body is a flat plate structure and extends along a first direction. The unloading structure is formed with at least one unloading surface, and the unloading surface extends along a second direction. The first direction and the second direction are not parallel.

3. The protective plate according to claim 2, characterized in that The unloading structure includes a protruding structure protruding from the protective plate body, and at least one side of the protruding structure is inclined to form the unloading surface.

4. The protective plate according to claim 3, characterized in that The protruding structure includes at least one of a bump, a rib and a ridge.

5. The protective plate according to claim 1, characterized in that At least the portion of the force unloading structure that is connected to the protective plate body is made of elastic material.

6. The protective plate according to claim 1, characterized in that The protective plate further comprises: An edge connection portion is formed at the edge of the protective plate body, and a plurality of first mounting holes are provided on the edge connection portion.

7. The protective plate according to claim 4, characterized in that A plurality of second mounting holes are provided on the protective plate body.

8. The protective plate according to any one of claims 1 to 7, characterized in that The protective plate is made of hot-pressed steel.

9. The protective plate according to any one of claims 1 to 7, characterized in that The surface of the protective plate is provided with a carbon nano coating.

10. A battery pack structure, characterized in that: include: A box body having a mounting cavity; A battery cell module is arranged in the installation cavity; A liquid cooling plate is arranged in the installation cavity, and the liquid cooling plate is located below the battery cell module; and the protective plate according to any one of claims 1 to 9, wherein the protective plate is located below the liquid cooling plate.

11. The battery pack structure according to claim 10, characterized in that: The battery pack structure further includes: A fastening connector is connected between the box and the liquid cooling plate and can form a connecting end on the liquid cooling plate, and the protective plate is connected to the connecting end.

12. The battery pack structure according to claim 11, characterized in that: The fastening connection piece includes a large flange rivet nut, and the large flange rivet nut includes a connecting head, and the connecting head forms the connecting end.

13. The battery pack structure according to claim 10, characterized in that: The battery pack structure further includes: An anti-collision block is installed on the box body and connected to the force unloading structure in the protective plate.

14. The battery pack structure according to claim 13, characterized in that: A first reinforcing rib is formed inside the anti-collision block, and a second reinforcing rib is formed inside the liquid cooling plate. The extending direction of the first reinforcing rib is the same as the extending direction of the second reinforcing rib.

15. A vehicle, characterized in that: A battery pack structure comprising the battery pack structure according to any one of claims 10 to 14.

Images