Battery system and heavy truck

Abstract

The invention provides a battery system and electric equipment, the battery system comprises a frame mechanism, a plurality of battery packs and a sealing structure, and the frame mechanism is provided with a plurality of mounting layers; one or more battery packs are mounted on each mounting layer; the sealing structure covers the frame mechanism, and the sealing structure is used for sealing the battery system; the whole battery system is sealed through the sealing structure, so that an independent sealing design in a single battery pack is canceled and is converted into an integral sealing structure of the whole battery system, additional sealing requirements on a box body of the battery pack are not required, a complicated sealing path design is avoided, the sealing effect of the battery system is ensured, and the service life of the battery pack is prolonged. Therefore, internal parts of the battery pack are prevented from being corroded, and the insulation and other performances of the battery are ensured; and meanwhile, the sealing test before use is reduced to one time, so that the complexity of the sealing test is reduced, and the sealing test efficiency of the battery pack is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a battery system and a heavy-duty truck. Background Technology

[0002] Existing heavy-duty truck rear battery systems are composed of multiple stacked battery packs, each of which is an independent unit. Multiple battery packs are connected in series to form a battery system, and each battery pack is an independent sealing element. This makes the sealing test process of the battery pack cumbersome, the sealing path design complex, and the sealing performance of the battery system poor. Summary of the Invention

[0003] Embodiments of the present invention provide a battery system and a heavy-duty truck that can improve the technical problem of poor sealing performance of battery systems.

[0004] In a first aspect, embodiments of the present invention provide a battery system comprising:

[0005] A frame structure, wherein the frame structure is provided with multiple mounting layers;

[0006] Multiple battery packs, with one or more of the battery packs mounted on each of the mounting layers; and,

[0007] A sealing structure covering the frame mechanism, the sealing structure being used for sealing the battery system.

[0008] In one embodiment, the sealing structure includes a sealing plate, and the top frame of the frame mechanism is sealingly connected to the sealing plate; and,

[0009] The sealing structure also includes a skin, and the side frame of the frame mechanism is sealed to the skin;

[0010] The bottom frame of the frame mechanism and the bottom plate of the battery pack located at the lowest layer are sealed together.

[0011] In this way, the sealing plate and the skin form a complete sealed battery system, ensuring the sealing performance and overall protection of the battery system.

[0012] In this way, the sealing plate and skin can effectively prevent external environmental factors (such as dust and moisture) from entering the battery system from the top, providing additional protection for the battery pack.

[0013] Furthermore, the skin covering the periphery of the frame structure can form a relatively closed shell with the sealing plate, preventing external substances from entering from the side, and also playing a certain protective role in avoiding damage to the battery system from external physical impacts.

[0014] In this way, the sealing effect and protection capability of the battery system are significantly improved through the cooperation of the sealing plate and the skin, which further ensures the reliability and service life of the battery system in complex environments, and also provides support for the overall structural stability of the battery system.

[0015] Furthermore, by combining the mask and the sealing plate, the independent sealing design in a single battery pack is eliminated, and the sealing function is centralized in the overall sealing structure of the entire battery system. This eliminates the additional sealing requirements for the battery pack housing, simplifies the sealing path design, and effectively ensures the sealing effect of the battery system.

[0016] Meanwhile, because the entire system adopts a unified sealing structure, the sealing test before use is reduced to one, which greatly reduces the cumbersomeness of the sealing test, improves the sealing test efficiency of the battery pack, and thus enhances the reliability and maintenance convenience of the entire battery system.

[0017] In one embodiment, the sealing structure further includes a sealing ring, which is provided between the sealing plate and the frame mechanism; and / or, the sealing ring is provided between the skin and the frame mechanism.

[0018] In this way, the sealing ring can further enhance the sealing between the frame mechanism and the skin or the frame mechanism and the sealing plate. The sealing plate, skin and sealing ring form a complete sealed battery system, ensuring the sealing performance and overall protection of the battery system.

[0019] In one embodiment, the bottom frame of the frame mechanism and the bottom plate of the battery pack located at the lowest layer are sealed together by the sealing ring.

[0020] In this way, there is no need to set a separate sealing plate at the bottom of the frame mechanism. The sealing ring and the bottom plate of the battery pack itself can achieve a seal with the bottom frame of the frame mechanism, reducing costs.

[0021] It should also be noted that, in specific implementation, sealant can be applied between the bottom frame of the frame structure and the bottom plate of the bottom battery pack to achieve a sealing effect; of course, an additional layer of waterproof adhesive can be added to the sealing ring between the bottom frame of the frame structure and the bottom plate of the bottom battery pack to ensure a sealing effect between the bottom frame of the frame structure and the bottom plate of the bottom battery pack.

[0022] In one embodiment, the ratio of the volume of one of the battery packs to the volume of the space of the frame mechanism is greater than or equal to 0.08 and less than or equal to 0.1.

[0023] It should also be noted that before installing the battery pack, a suitable battery pack needs to be selected according to the space requirements of the battery system installation location. In this embodiment, the installation space size of the battery system is 2500mm×870mm×2300mm, and the maximum size of the battery pack selected according to this size is 2310mm×850mm×224mm.

[0024] However, this design is not limited to this. In other embodiments, the dimensions of the frame mechanism can be finely adjusted according to the actual installation space size, but the maximum size of the battery pack shall not exceed 2310mm×850mm×224mm.

[0025] In one embodiment, the gap between two adjacent battery packs is 50mm to 70mm along the height direction of the frame mechanism 1; and / or, the gap between two adjacent battery packs 2 is 50mm to 70mm along the width direction of the frame mechanism.

[0026] This ensures a safe gap between adjacent battery packs, preventing a malfunction in one battery pack from affecting the normal operation of the others and guaranteeing the battery system's functionality.

[0027] In one embodiment, the battery pack has a connecting portion on its peripheral side, which overlaps the frame mechanism for fixed or detachable connection with the frame mechanism.

[0028] Thus, the connection part allows the battery pack to be securely mounted on the frame mechanism, ensuring the structural stability of the entire battery system during operation and preventing the battery pack from loosening or shifting due to vibration or external forces, thereby ensuring the safety and reliability of the battery system.

[0029] Thus, the detachable connection design facilitates the maintenance and replacement of the battery pack. When the battery pack needs to be inspected, replaced or upgraded, there is no need to disassemble the entire battery system on a large scale. The battery pack can be removed from the frame structure with a simple operation, which greatly improves maintenance efficiency and reduces maintenance costs.

[0030] In addition, this connection method enhances the flexibility and scalability of the battery system, allowing for rapid adjustment of the number or layout of battery packs to meet the requirements of different application scenarios.

[0031] It should also be noted that in this embodiment, the connecting part is threadedly connected to the frame mechanism by bolts.

[0032] In one embodiment, the frame mechanism includes:

[0033] A main frame assembly having a plurality of mounting layers, each mounting layer having an opening for the battery pack to enter and exit the mounting layer; and,

[0034] A limiting beam assembly, detachably connected to the opening, for preventing the battery pack from detaching from the mounting layer.

[0035] Thus, the opening facilitates the installation and removal of the battery pack before installation. After the battery pack is installed on the mounting layer, the limiting beam assembly is installed on the opening to further prevent the battery pack from detaching from the mounting layer, thereby limiting the battery pack from detaching from the opening and ensuring the installation of the battery pack.

[0036] Furthermore, the setting of the limiting beam assembly ensures the stability of the battery pack during operation, preventing it from accidentally falling off due to vibration or other external forces, thereby ensuring the safety and reliability of the entire battery system.

[0037] It should also be noted that, in actual implementation, due to the setting of the main frame components, the stacking of battery packs will not put excessive pressure on the battery box located at the bottom, preventing the box from being crushed. At the same time, the limiting beam components can also support the battery packs, which can share some of the pressure on the main frame components and improve the overall integrity of the battery system.

[0038] In one embodiment, the bottom plate of the battery pack is provided with a cooling medium cavity for containing coolant.

[0039] In this way, the coolant can directly exchange heat with the cells inside the battery pack through the cooling medium chamber, effectively reducing the heat generated by the battery during charging and discharging, thereby maintaining the battery pack within a suitable operating temperature range, extending the battery's lifespan, and improving the battery's performance and safety.

[0040] In this way, integrating the cooling medium chamber into the base plate of the battery pack not only optimizes the internal space structure of the battery pack and reduces the space occupied by additional cooling devices, but also enhances the compactness and integrity of the entire battery system.

[0041] In one embodiment, the connecting portion is disposed on the base plate.

[0042] In this way, the base plate can better withstand the forces and torques generated during the connection process, thereby ensuring that the battery pack will not loosen or shift due to vibration or external forces during operation, thus enhancing the structural stability of the entire battery system.

[0043] In addition, this connection method simplifies the installation and removal process of the battery pack. Operators can more easily install and remove the battery pack from below without having to perform complicated flipping or adjustment, which greatly improves the efficiency of maintaining and replacing the battery pack.

[0044] Meanwhile, integrating the connectors into the base plate also helps to optimize the overall structural design of the battery pack, reduce the space occupied by additional connectors, make the overall layout of the battery pack more compact, and lower the center of gravity of the entire battery system, further improving the space utilization and overall performance of the battery system.

[0045] In one embodiment, two adjacent battery packs are bonded together with structural adhesive along the height direction of the frame structure.

[0046] In this way, the structural adhesive can ensure a tight connection between adjacent battery packs, forming a whole, thereby enhancing the structural stability of the entire battery system, preventing relative displacement of the battery packs due to vibration or external forces during operation, and ensuring the safety and reliability of the battery system.

[0047] In this way, the structural adhesive can also act as a seal between adjacent battery packs, further enhancing the sealing performance inside the battery system and preventing external impurities such as moisture and dust from entering between the battery packs, thereby providing a better protective environment for the battery packs.

[0048] In one embodiment, the battery system further includes a liquid cooling plate attached to the upper surface of the battery pack located at the topmost side.

[0049] In this way, by closely fitting the upper surface of the topmost battery pack, the liquid cooling plate can efficiently conduct the heat generated by the battery pack during operation to the coolant. Combined with the cooling medium cavity inside the battery pack, this achieves rapid heat dissipation, ensuring that the battery pack remains within the ideal temperature range under high load, effectively extending the battery's lifespan and improving its performance stability.

[0050] It is understood that in this embodiment, the battery system is a six-layer structure with six battery packs.

[0051] In summary, during battery installation, the first battery pack is first installed in the main frame assembly, and structural adhesive is applied to the top of the first battery pack. The battery pack is fixed to the main frame assembly through the connection part of the battery pack. The bottom of the battery pack, the bottom mounting surface of the main frame assembly, and the sealing ring located at the bottom complete the sealing of the bottom of the system. Therefore, there is no need to set a sealing plate or skin separately at the bottom of the main frame assembly, thus reducing costs.

[0052] At this point, the upper limit beam assembly is installed, and the second-layer battery pack is inserted. Bolts are used to fix the second-layer battery pack to the mounting surface of the second-layer battery pack. By locking the connection part of the second-layer battery pack and the main frame assembly, the upper part of the second-layer battery pack and the sealing ring located at the bottom of the first-layer battery pack are squeezed to achieve the sealing of the bottom battery pack. In addition, the bottom surface of the second-layer battery pack is in direct contact with the top structural adhesive of the first-layer battery pack. After curing, the upper and lower battery packs can be firmly bonded to form a whole.

[0053] By repeating the two steps above, the six-layer battery system in this embodiment can be formed.

[0054] Secondly, embodiments of the present invention provide a heavy-duty truck that includes the battery system as described in the foregoing embodiments.

[0055] In one embodiment, the heavy-duty truck includes an interconnected cab and a body, with the battery system disposed on the side of the cab closer to the body.

[0056] The beneficial effects of the embodiments of the present invention are as follows:

[0057] In embodiments of the present invention, the entire battery system is sealed by a sealing structure, thereby eliminating the independent sealing design in a single battery pack and transforming it into an overall sealed structure for the entire battery system. Therefore, there is no need for additional sealing requirements for the battery pack housing, eliminating complex sealing path design and ensuring the sealing effect of the battery system. This prevents corrosion of the internal parts of the battery pack and ensures the insulation and other performance of the battery. At the same time, the sealing test before use is reduced to one, reducing the cumbersomeness of the sealing test and improving the sealing test efficiency of the battery pack. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 This is a schematic diagram of the battery system provided in an embodiment of the present invention;

[0060] Figure 2 yes Figure 1 A schematic diagram of a partial structure of the battery system shown;

[0061] Figure 3 yes Figure 1 The diagram shows the structural schematic of the sealing structure in the battery system.

[0062] Figure 4 It is at Figure 3 A magnified view of a section at point A in the middle;

[0063] Figure 5 yes Figure 1 The diagram shows the structure of the battery pack in the battery system shown.

[0064] Figure 6 yes Figure 1 The diagram shows the structural schematic of the frame mechanism in the battery system (with one layer of battery pack installed);

[0065] Figure 7 yes Figure 1 The diagram shows the structural schematic of the frame mechanism in the battery system (equipped with two battery packs).

[0066] Figure 8 yes Figure 1 The diagram shows the structure of the liquid cooling plate in the battery system.

[0067] Figure 9 This is a structural schematic diagram of a heavy-duty truck provided in an embodiment of the present invention.

[0068] The diagram is marked as follows:

[0069] 100. Battery system;

[0070] 1. Frame structure; 11. Mounting layer; 12. Main frame assembly; 13. Limiting beam assembly;

[0071] 2. Battery pack; 21. Connecting part;

[0072] 3. Sealing structure; 31. Sealing ring; 32. Sealing plate; 33. Skin;

[0073] 4. Structural adhesive;

[0074] 5. Liquid cooling plate;

[0075] 200. Heavy trucks. Detailed Implementation

[0076] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0077] With the continuous growth of new energy vehicle ownership, the electrification of commercial vehicles is also in full swing. Currently, there are two main ways to arrange the battery system 100 on the vehicle body of heavy-duty tractor trucks: one is under-mounted, and the other is rear-mounted. In the traditional rear-mounted type, a single battery pack 2 is installed layer by layer through a frame steel frame. When the power demand is within 400kWh, the entire battery system 100 stacked is about 1.3 meters high. At this time, the height is within an acceptable range, the center of gravity of the battery system 100 is not high, and it will not be higher than the top of the cab. However, the current requirements for driving range are getting longer and longer, so it is necessary to increase the system capacity. Now, the power demand of a single vehicle is generally 600kWh to 800kWh. At this time, if the battery cells remain unchanged, the only way is to add battery pack 2 stacked in the height direction, which will increase the height of the battery system 100 by one-third, reaching about 2.0 meters. The center of gravity is seriously raised, and the entire steel frame needs to be made very strong to withstand the strength requirements. This results in a heavy system weight and the range does not increase proportionally. At the same time, the installation and maintenance of the battery system 100 are very difficult, and the appearance is not good.

[0078] The higher the battery system's strength, the higher the requirements for the steel frame and the battery pack itself. Increasing the strength design will significantly increase the overall vehicle cost, negatively impacting the driving range, and leading to numerous after-sales issues.

[0079] In addition, a safety gap of 50mm to 70mm or more must be reserved between the upper and lower battery packs 2 of the entire battery system 100. The total space of the battery system 100 reaches 250mm to 350mm, which is a serious waste of space. Moreover, each battery pack 2 is an independent individual and cannot form a whole with each other. It does not contribute to the overall rigidity of the system and relies entirely on the external steel frame to provide overall strength, which makes the frame design very difficult.

[0080] In addition, existing heavy-duty truck rear battery systems 100 are all composed of multiple battery packs 2 stacked together. Each battery pack 2 is an independent unit, and the battery packs 2 are connected in series and parallel to form the required system. Each battery pack 2 is an independent sealing element and does not affect each other. This makes the sealing test process of the battery pack 2 cumbersome and the sealing path design complicated. The sealing performance of the battery system 100 is poor. Airtightness failure will lead to corrosion of the internal components of the battery pack 2, and a decrease in battery insulation and performance. This has always been a major pain point in the battery pack 2 industry.

[0081] Reference Figures 1 to 3 As shown, an embodiment of the present invention provides a battery system 100, which includes a frame mechanism 1, a plurality of battery packs 2 and a sealing structure 3. The frame mechanism 1 is provided with a plurality of mounting layers 11; one or more battery packs 2 are mounted on each mounting layer 11; and the sealing structure 3 covers the frame mechanism 1 and is used to seal the battery system 100.

[0082] In the embodiments of the present invention, the entire battery system 100 is sealed by the sealing structure 3, thereby eliminating the independent sealing design in a single battery pack 2 and transforming it into an overall sealing structure 3 for the entire battery system 100. Therefore, there is no need for additional sealing requirements for the battery pack 2's casing, eliminating the need for complex sealing path design, ensuring the sealing effect of the battery system 100, thereby preventing corrosion of the internal parts of the battery pack 2, and ensuring the battery's insulation and other performance. At the same time, the sealing test before use is reduced to one, reducing the cumbersomeness of the sealing test and improving the sealing test efficiency of the battery pack 2.

[0083] It is understood that in this embodiment, the battery pack 2 is made of aluminum profiles welded together, with a box-shaped design.

[0084] In one embodiment, reference is made to Figure 3 and Figure 4 As shown, the sealing structure 3 includes a sealing plate 32, and the top frame of the frame mechanism 1 is sealed to the sealing plate 32; and the sealing structure 3 also includes a skin 33, and the side frame of the frame mechanism 1 is sealed to the skin 33; the bottom frame of the frame mechanism 1 is sealed to the bottom plate of the battery pack 2 located at the lowest layer.

[0085] Thus, the sealing plate 32 and the skin 33 form a complete sealed battery system 100, ensuring the sealing performance and overall protection of the battery system 100.

[0086] Thus, the sealing plate 32 and the skin 33 can effectively prevent external environmental factors (such as dust, moisture, etc.) from entering the battery system 100 from the top, providing additional protection for the battery pack 2.

[0087] Furthermore, the skin 33 covers the periphery of the frame mechanism 1, forming a relatively closed shell with the sealing plate 32 to prevent external substances from entering from the side, while also providing a certain degree of protection to avoid damage to the battery system 100 from external physical impacts.

[0088] Thus, through the cooperation of the sealing plate 32 and the skin 33, the sealing effect and protection capability of the battery system 100 are significantly improved, further ensuring the reliability and service life of the battery system 100 in complex environments, and also providing support for the overall structural stability of the battery system 100.

[0089] Furthermore, the cooperation of the cover plate and the sealing plate 32 not only eliminates the independent sealing design in a single battery pack 2, but also concentrates the sealing function into the overall sealing structure 3 of the entire battery system 100, thereby eliminating the additional sealing requirements for the battery pack 2 housing, simplifying the sealing path design, and effectively ensuring the sealing effect of the battery system 100.

[0090] Meanwhile, since the entire system adopts a unified sealing structure 3, the sealing test before use is reduced to one, which greatly reduces the cumbersomeness of the sealing test and improves the sealing test efficiency of the battery pack 2, thereby improving the reliability and maintenance convenience of the entire battery system 100.

[0091] In one embodiment, the sealing structure 3 further includes a sealing ring 31, and a sealing ring 31 is provided between the sealing plate 32 and the frame mechanism 1; and / or, a sealing ring 31 is provided between the skin 33 and the frame mechanism 1.

[0092] Thus, the sealing ring 31 can further enhance the sealing between the frame mechanism 1 and the skin 33 or the frame mechanism 1 and the sealing plate 32. The sealing plate 32, the skin 33 and the sealing ring 31 form a complete sealed battery system 100, ensuring the sealing performance and overall protection of the battery system 100.

[0093] It should be noted that in this application, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the related objects before and after it are in an "or" relationship.

[0094] In one embodiment, the bottom frame of the frame mechanism 1 and the bottom plate of the battery pack 2 located at the bottom layer are sealed together by a sealing ring 31.

[0095] In this way, there is no need to set a separate sealing plate 32 on the bottom frame of the frame mechanism 1. The sealing can be achieved with the bottom frame of the frame mechanism 1 by relying on the sealing ring 31 and the bottom plate of the battery pack 2 itself, thus reducing costs.

[0096] It should also be noted that, in specific implementation, sealant can be applied between the bottom frame of the frame mechanism 1 and the bottom plate of the battery pack 2 at the bottom layer to form a sealing effect; of course, a waterproof sealant can also be added separately to the sealing ring 31 between the bottom frame of the frame mechanism 1 and the bottom plate of the battery pack 2 at the bottom layer to ensure the sealing effect between the bottom frame of the frame mechanism 1 and the bottom plate of the battery pack 2 at the bottom layer.

[0097] In some embodiments, the ratio of the volume of a battery pack 2 to the volume of the space of the frame mechanism 1 is greater than or equal to 0.08 and less than or equal to 0.1.

[0098] It should also be noted that before installing the battery pack 2, a suitable battery pack 2 needs to be selected according to the space requirements of the battery system 100 installation location. In this embodiment, the installation space size of the battery system 100 is 2500mm×870mm×2300mm, and the maximum size of the battery pack 2 selected according to this size is 2310mm×850mm×224mm.

[0099] However, this design is not limited to this. In other embodiments, the dimensions of the frame mechanism 1 can be finely adjusted according to the actual installation space size, but the maximum size of the battery pack 2 shall not exceed 2310mm×850mm×224mm.

[0100] In some embodiments, the gap between two adjacent battery packs 2 is 50mm to 70mm along the height direction of the frame mechanism 1; and / or, the gap between two adjacent battery packs 2 is 50mm to 70mm along the width direction of the frame mechanism 1.

[0101] In this way, a safety gap can be maintained between two adjacent battery packs 2, so as to prevent the failure of a single battery pack 2 from affecting the normal use of the other battery packs 2 and ensuring the use of the battery system 100.

[0102] In some embodiments, refer to Figure 5 As shown, the battery pack 2 has a connecting part 21 on its peripheral side. The connecting part 21 overlaps the frame mechanism 1 for fixed connection or detachable connection with the frame mechanism 1.

[0103] Thus, the connection part 21 allows the battery pack 2 to be securely installed on the frame mechanism 1, ensuring the structural stability of the entire battery system 100 during operation and preventing the battery pack 2 from loosening or shifting due to vibration or external force, thereby ensuring the safety and reliability of the battery system 100.

[0104] Thus, the detachable connection provides convenience for the maintenance and replacement of the battery pack 2. When the battery pack 2 needs to be inspected, replaced or upgraded, there is no need to disassemble the entire battery system 100 on a large scale. The battery pack 2 can be removed from the frame mechanism 1 with simple operation, which greatly improves maintenance efficiency and reduces maintenance costs.

[0105] In addition, this connection method enhances the flexibility and scalability of the battery system 100, allowing for rapid adjustment of the number or layout of the battery pack 2 according to actual needs to meet the requirements of different application scenarios.

[0106] It should also be noted that in this embodiment, the connecting part 21 is threadedly connected to the frame mechanism 1 by bolts.

[0107] In some embodiments, refer to Figure 6 and Figure 7 As shown, the frame mechanism 1 includes a main frame assembly 12 and a limiting beam assembly 13. The main frame assembly 12 forms multiple mounting layers 11, each mounting layer 11 having an opening for the battery pack 2 to enter and exit the mounting layer 11; the limiting beam assembly 13 is detachably connected to the opening to restrict the battery pack 2 from detaching from the mounting layer 11.

[0108] Thus, the opening facilitates the installation and removal of the battery pack 2 before installation. After the battery pack 2 is installed on the mounting layer 11, the limiting beam assembly 13 is installed on the opening to further prevent the battery pack 2 from detaching from the mounting layer 11, thereby limiting the battery pack 2 from detaching from the opening and ensuring the installation of the battery pack 2.

[0109] Furthermore, the setting of the limiting beam assembly 13 ensures the stability of the battery pack 2 during operation and prevents it from accidentally falling off due to vibration or other external forces, thereby ensuring the safety and reliability of the entire battery system 100.

[0110] It should also be noted that, in specific implementation, due to the setting of the main frame component 12, the battery pack 2 will not put too much pressure on the battery box located at the bottom after being stacked, thus preventing the box from being crushed. At the same time, the limiting beam component 13 can also support the battery pack 2, which can share some of the pressure on the main frame component 12 and improve the overall integrity of the battery system 100.

[0111] In some embodiments, the bottom plate of the battery pack 2 is provided with a cooling medium cavity for containing coolant.

[0112] In this way, the coolant can directly exchange heat with the cells inside the battery pack 2 through the cooling medium cavity, effectively reducing the heat generated by the battery during charging and discharging, thereby maintaining the battery pack 2 within a suitable operating temperature range, extending the battery's lifespan, and improving the battery's performance and safety.

[0113] In this way, integrating the cooling medium cavity into the base plate of the battery pack 2 not only optimizes the internal space structure of the battery pack 2 and reduces the space occupied by additional cooling devices, but also enhances the compactness and integrity of the entire battery system 100.

[0114] In some embodiments, refer to Figure 5 As shown, the connecting part 21 is provided on the base plate.

[0115] In this way, the base plate can better withstand the forces and torques generated during the connection process, thereby ensuring that the battery pack 2 will not loosen or shift due to vibration or external forces during operation, thus enhancing the structural stability of the entire battery system 100.

[0116] In addition, this connection method simplifies the installation and removal process of battery pack 2. Operators can more easily install and remove the battery pack 2 from below without having to perform complicated flipping or adjustment, which greatly improves the efficiency of maintaining and replacing battery pack 2.

[0117] Meanwhile, integrating the connecting part 21 into the base plate also helps to optimize the overall structural design of the battery pack 2, reduce the space occupied by the additional connecting part 21, make the overall layout of the battery pack 2 more compact, and lower the center of gravity of the entire battery system 100, further improving the space utilization and overall performance of the battery system 100.

[0118] In some embodiments, refer to Figure 6 and Figure 7 As shown, along the height direction of the frame mechanism 1, two adjacent battery packs 2 are bonded together by structural adhesive 4.

[0119] In this way, the structural adhesive 4 can ensure that the adjacent battery packs 2 are tightly connected to form a whole, thereby enhancing the structural stability of the entire battery system 100, preventing the battery packs 2 from being displaced relative to each other due to vibration or external force during operation, and ensuring the safety and reliability of the battery system 100.

[0120] In this way, the structural adhesive 4 can also play a sealing role between adjacent battery packs 2, further enhancing the sealing performance inside the battery system 100, preventing external impurities such as moisture and dust from entering between the battery packs 2, thereby providing a better protective environment for the battery packs 2.

[0121] In some embodiments, refer to Figure 7 As shown, the battery system 100 also includes a liquid cooling plate 5, which is attached to the upper surface of the battery pack 2 located at the top.

[0122] In this way, by closely fitting the upper surface of the topmost battery pack 2, the liquid cooling plate 5 can efficiently conduct the heat generated by the battery pack 2 during operation to the coolant. Combined with the cooling medium cavity inside the battery pack 2, this achieves rapid heat dissipation, ensuring that the battery pack 2 remains within the ideal temperature range when operating under high load, effectively extending the battery's lifespan and improving its performance stability.

[0123] It is understood that in this embodiment, the battery system 100 is a six-layer structure with six battery packs 2.

[0124] In summary, referring to Figures 5 to 8 As shown, during the battery installation process, the first battery pack 2 is first installed in the main frame assembly 12, and structural adhesive 4 is applied to the top of the first battery pack 2. The battery pack 2 and the main frame assembly 12 are fixed through the connection part 21 of the battery pack 2. The bottom of the battery pack 2, the bottom mounting surface of the main frame assembly 12 and the sealing ring 31 located at the bottom complete the sealing of the bottom of the system. Therefore, there is no need to set a sealing plate 32 or skin 33 separately at the bottom of the main frame assembly 12, which reduces costs.

[0125] At this time, the upper limit beam assembly 13 is installed, and the second-layer battery pack 2 is installed. The second-layer battery pack 2 is fixed to the mounting surface of the second-layer battery pack 2 with bolts. By locking the connecting part 21 of the second-layer battery pack 2 and the main frame assembly 12, the upper part of the second-layer battery pack 2 and the sealing ring 31 located at the bottom of the first-layer battery pack 2 are squeezed to achieve the sealing of the bottom battery pack 2. In addition, the bottom surface of the second-layer battery pack 2 is in direct contact with the top structural adhesive 4 of the first-layer battery pack 2. After curing, the upper and lower battery packs 2 can be firmly bonded to form a whole.

[0126] By repeating the two steps above, the six-layer battery system 100 in this embodiment can be formed.

[0127] Secondly, referring to Figure 9 As shown, embodiments of the present invention also provide a heavy-duty truck 200, which includes the battery system 100 as described in the foregoing embodiments.

[0128] The heavy truck 200 has all the beneficial effects of the battery system 100 of the aforementioned embodiments, which will not be repeated here.

[0129] In some embodiments, the heavy-duty truck 200 includes a cab and a body connected to each other, and the battery system 100 is disposed on the side of the cab near the body.

[0130] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery system, characterized in that, include: A frame mechanism (1) is provided with multiple mounting layers (11); Multiple battery packs (2), with one or more of the battery packs (2) mounted on each of the mounting layers (11); and, A sealing structure (3) covers the frame mechanism (1) and is used for sealing the battery system (100).

2. The battery system according to claim 1, characterized in that, The sealing structure (3) includes a sealing plate (32), and the top frame of the frame mechanism (1) is sealed to the sealing plate (32); and, The sealing structure (3) also includes a skin (33), and the side frame of the frame mechanism (1) and the skin (33) are sealed together; The bottom frame of the frame mechanism (1) and the bottom plate of the battery pack (2) located at the lowest layer are sealed together.

3. The battery system according to claim 2, characterized in that, The sealing structure (3) further includes a sealing ring (31), which is provided between the sealing plate (32) and the frame mechanism (1), and / or the sealing ring (31) is provided between the skin (33) and the frame mechanism (1).

4. The battery system according to claim 3, characterized in that, The bottom frame of the frame mechanism (1) and the bottom plate of the battery pack (2) located at the lowest layer are sealed together by the sealing ring (31).

5. The battery system according to any one of claims 1-4, characterized in that, The ratio of the volume of one of the battery packs (2) to the volume of the space of the frame mechanism (1) is greater than or equal to 0.08 and less than or equal to 0.

1.

6. The battery system according to any one of claims 1-4, characterized in that, Along the height direction of the frame mechanism (1), the gap between two adjacent battery packs (2) is 50mm to 70mm; and / or, Along the width direction of the frame mechanism (1), the gap between two adjacent battery packs (2) is 50mm to 70mm.

7. The battery system according to any one of claims 1-4, characterized in that, The battery pack (2) has a connecting part (21) on its peripheral side. The connecting part (21) overlaps the frame mechanism (1) for fixed connection or detachable connection with the frame mechanism (1).

8. The battery system according to claim 7, characterized in that, The frame mechanism (1) includes: A main frame assembly (12) having a plurality of mounting layers (11), each mounting layer (11) having an opening for the battery pack (2) to enter and exit the mounting layer (11); and, A limiting beam assembly (13) is detachably connected to the opening to restrict the battery pack (2) from detaching from the mounting layer (11) through the opening.

9. The battery system according to claim 7, characterized in that, The bottom plate of the battery pack (2) is provided with a cooling medium cavity, which is used to contain coolant.

10. The battery system according to claim 9, characterized in that, The connecting part (21) is disposed on the base plate.

11. The battery system according to any one of claims 8-10, characterized in that, Along the height direction of the frame structure (1), two adjacent battery packs (2) are bonded together by structural adhesive (4).

12. The battery system according to claims 8-10, characterized in that, The battery system (100) also includes a liquid cooling plate (5), which is attached to the upper surface of the battery pack (2) located at the topmost side.

13. A heavy-duty truck, characterized in that, Includes the battery system (100) as described in any one of claims 1-12.

14. The heavy-duty truck according to claim 13, characterized in that, The heavy truck (200) includes a cab and a body connected to each other, and the battery system (100) is located on the side of the cab near the body.

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