Battery assembly, vehicle and battery swapping station

Abstract

A battery assembly, a vehicle and a battery swap station, the battery assembly comprising a plurality of batteries, each battery having a mounting structure, the batteries being adapted to be arranged at a bottom of the vehicle and detachably connected to the vehicle by the mounting structure, so that the plurality of batteries are individually and detachably mounted to the vehicle.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module, vehicle, and battery swapping station. Background Technology

[0002] New energy vehicles in related technologies are equipped with a large battery pack. When a battery swap is needed, the entire battery pack must be replaced. Often, the battery pack is swapped before it is fully discharged, resulting in wasted power. Furthermore, the large size of the battery pack makes swapping difficult and inefficient. Utility Model Content

[0003] This application provides a battery module, vehicle, and battery swapping station that are compatible with various scenarios.

[0004] In a first aspect, embodiments of this application provide a battery assembly including a plurality of batteries, each of which has a mounting structure. The batteries are adapted to be disposed at the bottom of a vehicle and detachably connected to the vehicle via the mounting structure, so that the plurality of batteries are individually and detachably installed to the vehicle.

[0005] In the above technical solution, a corresponding number of batteries can be matched according to different application scenarios, mileage, and vehicle configurations, improving the flexibility of battery swapping and making the battery components of this application embodiment compatible with different vehicle models and application scenarios. Furthermore, it eliminates the need to install all batteries in the vehicle, reducing the vehicle's load. Also, since each battery can be replaced individually, deeply discharged batteries can be removed, avoiding the waste of battery power caused by replacing batteries before they are fully discharged. Moreover, the relatively small size of a single battery reduces the difficulty of battery swapping and improves swapping efficiency.

[0006] In some embodiments, at least one of the plurality of batteries is a first battery, the first battery comprising two first portions adapted to be disposed on the lateral sides of a longitudinal beam under the vehicle, the top surface of the first portion being higher than the bottom surface of the longitudinal beam under the vehicle, and the first portion comprising at least one first battery cell.

[0007] In some embodiments, the top surface of the first battery cell housed in the first portion is adapted to be above the height center of the vehicle underbody longitudinal beam; and / or, the top wall of the first portion is adapted to be below the top surface of the vehicle underbody longitudinal beam.

[0008] In some embodiments, the mounting structure includes a first mounting structure disposed on the first portion, the first mounting structure being located between the first portion and the outer side of the vehicle underbody longitudinal beam.

[0009] In some embodiments, the first mounting structure includes a plurality of sub-mounting parts arranged at longitudinal intervals.

[0010] In some embodiments, the longitudinal dimension L4 of the first portion is smaller than the lateral dimension L5 of the first battery.

[0011] In some embodiments, the two first portions are arranged symmetrically.

[0012] In some embodiments, the first portion includes a single layer or multiple layers of first battery layers arranged vertically, the first battery layer including a plurality of first battery cells arranged side by side, the first battery cell including at least one first battery cell.

[0013] In some embodiments, the first battery further includes a second portion connecting the two first portions, and the top surface of the second portion being lower than the top surface of the first portions to form a recess between the first portion and the two second portions suitable for accommodating the underbody longitudinal beam.

[0014] In some embodiments, the top surface of the second portion is adapted to be lower than the vehicle underbody longitudinal beam, and the top surface of the second portion has a first docking structure adapted to extend between two longitudinal beams of the vehicle underbody longitudinal beam and to dock with the vehicle to achieve current conduction and / or liquid conduction.

[0015] In some embodiments, the mating surfaces of the first mating structure face upwards for vertical mating, or the mating surfaces of the first mating structure face horizontally for horizontal mating.

[0016] In some embodiments, the first docking structure is located at the longitudinal center of the first battery.

[0017] In some embodiments, the second portion also includes at least one of the first battery cells.

[0018] In some embodiments, the second portion includes a single layer or multiple layers of first battery layers arranged vertically, the first battery layer including a plurality of first battery cells arranged side by side, the first battery cell including at least one first battery cell.

[0019] In some embodiments, the first portion also includes one or more layers of the first battery layer arranged vertically, and the total height H4 of the first battery cells contained in the first portion is greater than the total height H3 of the first battery cells contained in the second portion.

[0020] In some embodiments, at least two of the plurality of batteries are the first batteries, and all the first batteries are adapted to be arranged sequentially along the longitudinal direction of the vehicle.

[0021] In some embodiments, a clearance gap is provided between two adjacent first batteries.

[0022] In some embodiments, each of the first batteries has the same specifications, or at least two of the first batteries have different specifications.

[0023] In some embodiments, at least one of the plurality of batteries is a second battery, the second battery being adapted to be located on one transverse side of the longitudinal beam of the vehicle floor, and the top surface of the second battery being higher than the bottom surface of the longitudinal beam of the vehicle floor, the second battery comprising at least one second battery cell.

[0024] In some embodiments, the mounting structure includes a second mounting structure disposed on the second battery, the second mounting structure being located between the second battery and the outer side of the vehicle underbody longitudinal beam.

[0025] In some embodiments, the second battery includes one layer or multiple layers of second battery arranged vertically, the second battery layer including a plurality of second battery cells arranged side by side, and the second battery cell including at least one second battery cell.

[0026] In some embodiments, at least one of the plurality of batteries is a third battery, the third battery comprising a third portion and a fourth portion, each of the third portion and the fourth portion comprising at least one third battery cell, the fourth portion being a single cell disposed on one lateral side of the third portion, the top surface of the fourth portion being higher than the top surface of the third portion, the top surface of the third portion being adapted to be lower than the bottom surface of the vehicle underbody longitudinal beam, and the third portion being adapted to be located below the vehicle underbody longitudinal beam, the fourth portion being adapted to be located on one lateral side of the vehicle underbody longitudinal beam, and the top surface of the fourth portion being adapted to be higher than the bottom surface of the vehicle underbody longitudinal beam.

[0027] In some embodiments, the mounting structure includes a third mounting structure disposed on the third portion and / or the fourth portion, the third mounting structure being located between the third battery and the longitudinal beam of the vehicle floor.

[0028] In some embodiments, the top surface of the third portion has a second docking structure adapted to extend between the two longitudinal beams of the vehicle underbody longitudinal beam and to dock with the vehicle to achieve current conduction and / or liquid conduction.

[0029] In some embodiments, both the third portion and the fourth portion include one or more third battery layers arranged vertically, the third battery layer including a plurality of third battery cells arranged side by side, the third battery cell including at least one third battery cell, and the total height H6 of the third battery cells contained in the fourth portion is greater than the total height H5 of the third battery cells contained in the third portion.

[0030] In some embodiments, at least one of the capacity, shape, and size of at least two of the batteries is different.

[0031] In some embodiments, each of the batteries has the same specifications.

[0032] In some embodiments, a plurality of the batteries are connected in series and / or in parallel.

[0033] In some embodiments, each of the batteries has a power connector adapted to conduct current to the vehicle or to an adjacent battery.

[0034] In some embodiments, the power connector is located on the top surface of the battery and the mating surface of the power connector faces upward.

[0035] In some embodiments, each of the batteries has a fluid inlet connector adapted to communicate with the vehicle fluid or with the fluid of an adjacent battery.

[0036] In some embodiments, the liquid inlet connector is located on the top surface of the battery and the mating surface of the liquid inlet connector faces upward.

[0037] In some embodiments, the mounting structure is adapted to be detachably mounted to the longitudinal beam of the vehicle floor, and the mounting structure is located on the side of the battery facing the longitudinal beam of the vehicle floor.

[0038] In some embodiments, at least two of the batteries are arranged longitudinally along the underbody longitudinal beam; and / or at least two of the batteries are placed on opposite sides of the underbody longitudinal beam.

[0039] Secondly, embodiments of this application provide a vehicle, including a longitudinal beam under the vehicle floor and the aforementioned battery.

[0040] In some embodiments, a plurality of batteries are disposed at the bottom of the vehicle, and the plurality of batteries can be individually replaced relative to the vehicle.

[0041] In some embodiments, the vehicle includes a longitudinal beam under the vehicle floor, and the batteries are multiple and arranged longitudinally along the longitudinal beam under the vehicle floor. The unlocking position of the battery is located on the longitudinal outer side of the battery, and the gap between two adjacent batteries is more than 30 mm.

[0042] In some embodiments, the vehicle is a large heavy truck, a tractor unit, or a small truck.

[0043] In some embodiments, the vehicle is a heavy-duty truck, the vertical distance between the bottom surface of the vehicle's wheel and the bottom surface of the battery is H1, the vertical distance between the bottom surface of the vehicle's wheel and the bottom surface of the vehicle's undercarriage longitudinal beam is H2, and the vertical height of the battery is L3, where H1 ≥ 300 mm, H2 = 700 mm, and L3 = 600 mm.

[0044] Thirdly, embodiments of this application provide a battery swapping station for replacing the battery of the aforementioned vehicle.

[0045] In some embodiments, the battery swapping station includes a battery swapping area, the vehicle being adapted to swap the battery in the battery swapping area, the battery swapping area including a first area and a second area, the first area being adapted to be located directly below the battery, the second area being used to support the front wheel and rear wheel adjacent to the battery, and the first area being flush with the ground of the second area. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0048] Figure 2 Assembly drawings of the battery assembly and the vehicle underbody longitudinal beams provided in some embodiments of this application;

[0049] Figure 3 for Figure 2 The top view showing the assembly of the battery pack with the longitudinal beams under the vehicle.

[0050] Figure 4 for Figure 2 The side view showing the assembly of the battery pack with the longitudinal beams under the vehicle.

[0051] Figure 5 Exploded views of the battery and the longitudinal beam under the vehicle provided in some embodiments of this application;

[0052] Figure 6 Exploded views of batteries provided for some embodiments of this application;

[0053] Figure 7A perspective view of a first battery provided for some embodiments of this application;

[0054] Figure 8 for Figure 7 The front view of the first battery shown;

[0055] Figure 9 for Figure 8 The assembly diagram of the first battery and the longitudinal beam under the vehicle shown;

[0056] Figure 10 for Figure 7 A cross-sectional view of the first battery shown;

[0057] Figure 11 for Figure 7 A top view of the first battery shown;

[0058] Figure 12 Assembly drawings of the second and third batteries with the longitudinal beams of the vehicle underside provided in some embodiments of this application;

[0059] Figure 13 This application provides assembly drawings of a third battery and its connection to a longitudinal beam under the vehicle floor, based on some embodiments of the present application.

[0060] Figure 14 This is a plan view of a battery swapping station provided in some embodiments of this application.

[0061] Figure label:

[0062] Vehicle 1000; Battery assembly 100; Battery 1; Recess 10; First battery 11; First part 11a; Second part 11b; Second battery 12; Third battery 13; Third part 13a; Fourth part 13b; Battery layer 2; First battery layer 21; Second battery layer 22; Third battery layer 23; Battery cell 3; First battery cell 31; Second battery cell 32; Third battery cell 33; Battery cell 4; First battery cell 41; Second battery cell 42; Third battery cell 43; Housing 5; Mounting structure 6; Sub-mounting part 61; First mounting structure 62; Second Mounting structure 63; Third mounting structure 64; Power connector 741; Liquid connector 742; First docking structure 75; Second docking structure 76; Temperature regulating plate 8; First regulating plate 81; Second regulating plate 82; Third regulating plate 83; Fourth regulating plate 84; Fifth regulating plate 85; First common horizontal plate 861; Second common horizontal plate 862; Vehicle undercarriage longitudinal beam 200; Longitudinal beam 201; Connecting structure 300; Front wheel 400; Rear wheel 500; Battery swapping station 2000; Battery swapping area 600; First area 601; Second area 602; Lateral Y; Longitudinal X; Vertical Z. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, 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.

[0064] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0065] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0069] In this application, "multiple" means two or more (including two).

[0070] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0071] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. The battery in the embodiments of this application includes a housing for encapsulating one or more battery cells or multiple battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0072] In a battery, multiple battery cells can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these cells is housed within a casing. Alternatively, a battery can consist of multiple battery cells first connected in series, parallel, or a combination thereof to form a battery module, and then these modules are connected in series, parallel, or a combination thereof to form a single unit housed within a casing. Furthermore, a battery can include other structures, such as a busbar component, for electrical connection between the multiple battery cells.

[0073] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated one, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited to these.

[0074] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. As a core component of new energy vehicles, batteries have high requirements in terms of both safety and cycle life.

[0075] The inventors discovered that typical vehicles are usually equipped with a single large battery pack. When a battery swap is needed, the entire battery pack must be replaced, often resulting in the battery pack being replaced before it has been fully discharged, leading to wasted power. Moreover, the large size of a single battery pack makes swapping difficult and inefficient.

[0076] Based on the above considerations, the inventors, through in-depth research, designed a battery assembly comprising multiple batteries that can be individually swapped relative to the vehicle. This allows for the matching of the appropriate number of batteries according to different application scenarios, mileage, and vehicle configurations, improving battery swapping flexibility and making the battery assembly of this application compatible with different vehicle models and application scenarios. Furthermore, it eliminates the need to install all batteries in the vehicle, reducing the vehicle's load. Moreover, since each battery can be individually swapped, deeply discharged batteries can be removed, avoiding the waste of battery power caused by replacing batteries before they are fully discharged. Additionally, the relatively small size of individual batteries reduces the difficulty of battery swapping and improves swapping efficiency.

[0077] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The battery 1 can be used to power the vehicle 1000; for example, the battery 1 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller and a motor. The controller is used to control the battery 1 to supply power to the motor, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving. In some embodiments of this application, the battery 1 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source for the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle 1000.

[0078] like Figures 2-4 As shown, the battery assembly 100 includes a plurality of batteries 1, combined with Figure 5 Each battery 1 has a mounting structure 6, combined with Figure 1 The battery 1 is adapted to be located at the bottom of the vehicle 1000 and is detachably connected to the vehicle 1000 via the mounting structure 6, so that multiple batteries 1 can be individually and detachably installed to the vehicle 1000.

[0079] In the above embodiments, the arrangement of the plurality of batteries 1 in the battery assembly 100 is not limited. For example, at least two batteries 1 are arranged longitudinally along the vehicle 1000, or at least two batteries 1 are arranged laterally along the vehicle 1000, or at least two batteries 1 are arranged vertically along the vehicle 1000.

[0080] In this article, "longitudinal" refers to the length direction of vehicle 1000 (e.g., the X direction marked in the figure), or the front-to-back direction of vehicle 1000; "lateral" refers to the width direction of vehicle 1000 (e.g., the Y direction marked in the figure), or the left-to-right direction of vehicle 1000; and "vertical" refers to the height direction of vehicle 1000 (e.g., the Z direction marked in the figure), or the up-down direction of vehicle 1000.

[0081] In the above embodiments, the battery assembly 100 is not limited in its position at the bottom of the vehicle 1000. For example, in the longitudinal direction, it can be located at the front, rear, or middle of the bottom of the vehicle 1000, etc., and in the transverse direction, it can be located at the center of the bottom of the vehicle 1000, or on both sides of the center, etc.

[0082] In the above embodiments, each battery 1 has a mounting structure 6. The battery 1 can be detachably connected to the vehicle 1000 through the mounting structure 6, so that each battery 1 can be installed and removed from the vehicle 1000 independently. That is, when any battery 1 is removed from the vehicle 1000, it will not affect the connection relationship between the remaining battery 1 and the vehicle 1000.

[0083] The batteries in the related technologies do not have an installation structure. When installing such batteries into a vehicle, the battery needs to be installed into a battery swapping frame that houses it, and then the battery swapping frame is locked onto the vehicle. Due to the introduction of the battery swapping frame, the required installation space is large, and with limited space under the vehicle, it is difficult to improve the volumetric energy density of the battery.

[0084] According to the embodiments of this application, the battery 1 is mounted on a mounting structure 6 that can be detachably connected to the vehicle 1000. This allows the battery 1 to be installed onto the vehicle 1000, eliminating the need for a battery swapping frame in related technologies and reducing the space occupied by the swapping frame, thereby increasing the volumetric energy density of the battery 1. Furthermore, eliminating the swapping frame reduces costs, lowers the overall vehicle load, and improves swapping efficiency. Moreover, it lowers the design requirements for the battery's volume and load-bearing capacity in the battery swapping transport vehicle, reducing the design difficulty and cost of the transport vehicle.

[0085] Furthermore, in related technologies, batteries are installed using a battery swapping frame. To ensure battery energy density, the swapping frame is positioned relatively low above the ground. When there are protrusions in the ground, the frame is easily impacted, potentially damaging the battery. However, the battery 1 in this embodiment eliminates the need for a swapping frame, thus increasing its height above the ground. This reduces the risk of damage from ground protrusions and improves the safety and lifespan of the battery 1. Moreover, the increased height provides sufficient space for battery swapping operations.

[0086] Moreover, since the battery swapping frame is eliminated, the ground clearance of battery 1 can be increased. In some cases, the battery swapping station 2000 can be swapped without digging a trench or raising vehicle 1000. In short, the need to raise the whole vehicle or dig a trench can be eliminated, thereby simplifying the site layout of the battery swapping station 2000 and improving space utilization.

[0087] In the above embodiments, since the battery pack 100 includes multiple batteries 1, each battery 1 can be individually swapped with the vehicle 1000. The appropriate number of batteries 1 can be matched according to different application scenarios, mileage, and vehicle 1000 configurations, improving the flexibility of battery swapping. This allows the battery pack 100 of this application embodiment to be compatible with different vehicle models and application scenarios, and even to the point that a single battery pack 100 can cover more than 70% of vehicle models in the industry. Furthermore, since it is not necessary to match a single battery pack to a specific vehicle model, the adaptability of the battery swapping station is improved, thereby reducing the number of battery swapping stations, increasing the distance between adjacent stations, and reducing investment costs.

[0088] For example, large heavy trucks can use six batteries¹, while tractor units only need three batteries¹, and small trucks only need two batteries¹. Range requirements also need to be considered; for example, a tractor unit using three batteries¹ can travel 300-500 kilometers, but if a range of 300-500 kilometers is not required, then using two batteries¹ or one battery¹ can be considered.

[0089] Furthermore, it eliminates the need to install all batteries 1 into the vehicle 1000, reducing the load on the vehicle 1000. Also, since each battery 1 can be replaced individually, batteries 1 that have been deeply discharged can be removed, avoiding the waste of battery power caused by replacing batteries 1 before they are fully discharged.

[0090] Moreover, compared to a single large battery pack solution, the battery assembly 100 in this application comprises multiple batteries 1, each of which can be relatively small in size and can be replaced individually during battery swapping. This significantly increases the throughput of the battery swapping station 2000 within the same space. Furthermore, the relatively small size of each battery 1 reduces deformation, which helps improve the assembly success rate of the battery 1. The difficulty of swapping a single battery 1 is also reduced, thus improving the battery swapping efficiency.

[0091] In some embodiments, such as Figures 7-11 As shown, at least one of the multiple batteries 1 is a first battery 11. The first battery 11 includes two first portions 11a, which are adapted to be placed on the lateral sides of the longitudinal beam 200 of the vehicle floor of the vehicle 1000. The top surface of the first portion 11a is higher than the bottom surface of the longitudinal beam 200 of the vehicle floor. Figure 10 Each first part 11a includes at least one first battery cell 41.

[0092] In the above embodiment, the top surface of the first part 11a is higher than the bottom surface of the vehicle underbody longitudinal beam 200, while the bottom surface of the first part 11a can be lower than, flush with, or higher than the bottom surface of the vehicle underbody longitudinal beam 200, so that the first part 11a is located on the lateral side of the vehicle underbody longitudinal beam 200 to utilize the space at that location. Therefore, the first battery 11 can make full use of the space on both lateral sides of the vehicle underbody longitudinal beam 200 to accommodate a larger number of first battery cells 41, thereby ensuring a higher energy density of the first battery 11. Alternatively, the first battery cells 41 that originally needed to be placed at the bottom of the first battery 11 can be moved to the lateral sides of the vehicle underbody longitudinal beam 200, thereby increasing the ground clearance of the first battery 11. This ensures sufficient space between the bottom of the first battery 11 and the ground for battery swapping operations. Furthermore, the increased ground clearance of the first battery 11 reduces the risk of damage or scratches to the bottom of the first battery 11 due to ground protrusions, improving the safety and lifespan of the first battery 11. In summary, the first battery 11 with the above structure can effectively solve the problem of low space utilization, improve the safety and reliability of the first battery 11, and facilitate battery swapping of the first battery 11.

[0093] In some embodiments, the top surface of the first battery cell 41 housed in the first portion 11a (i.e., the top surface of the highest first battery cell 41 within the first portion 11a) is adapted to be higher than the height center of the vehicle underbody longitudinal beam 200, thereby making full use of the space on both sides of the vehicle underbody longitudinal beam 200 to arrange the first battery cell 41 and improve the energy density of the battery 1. Furthermore, the top wall of the first portion 11a may be lower than the top surface of the vehicle underbody longitudinal beam 200, thereby avoiding problems such as impacts.

[0094] In some embodiments, such as Figures 7-11 As shown, the mounting structure 6 includes a first mounting structure 62 disposed on the first part 11a, the first mounting structure 62 being located between the first part 11a and the outer side of the vehicle undercarriage longitudinal beam 200. That is, the first mounting structure 62 on the first part 11a is disposed on the inner sidewall of the first part 11a, i.e., on the side of the first part 11a facing the outer side of the vehicle undercarriage longitudinal beam 200.

[0095] Therefore, since each first part 11a is provided with a first mounting structure 62, the first battery 11 can have mounting points on both sides of the longitudinal beam 200 of the vehicle bottom. Thus, when each first part 11a is connected to the vehicle 1000 through the first mounting structure 62, the connection stability and connection reliability of the first battery 11 can be improved.

[0096] Furthermore, since the first mounting structure 62 on the first part 11a is located between the first part 11a and the outer side of the longitudinal beam 200 of the vehicle bottom, the position of the first mounting structure 62 is relatively concealed and can be protected, avoiding damage to the first mounting structure 62 from bumps and collisions, improving the installation reliability of the battery 1, and also preventing the first mounting structure 62 from being corroded by splashed mud and water during the operation of the vehicle 1000, which could lead to problems such as the inability to replace it.

[0097] Furthermore, in related technologies, when a battery is installed using a battery swapping frame, multiple locking structures are provided on the outer periphery of the frame. These locking structures are located on the side of the battery furthest from the longitudinal beam of the vehicle floor, resulting in a large torque on the locking structures and low installation reliability. However, according to the embodiment of this application, the first battery 11 has a smaller torque on its first mounting structure 62 located between the first part 11a and the outer side of the longitudinal beam 200 of the vehicle floor. This means the first mounting structure 62 is located on the side of the first battery 11 closest to the longitudinal beam 200, resulting in higher installation reliability for the first battery 11.

[0098] In addition, in related technologies, since the locking structure is located on the side of the battery away from the longitudinal beam of the vehicle floor, the distance between the locking structures on both sides is relatively far, making it difficult to ensure the relative positional accuracy of multiple locking structures. When replacing the battery, due to the low relative positional accuracy of multiple locking structures, it is difficult for multiple locking structures to quickly and accurately achieve their respective alignment, resulting in high battery replacement difficulty and low battery replacement efficiency.

[0099] According to the embodiments of this application, the first mounting structure 62 on the first part 11a is located between the first part 11a and the outer side of the vehicle bottom longitudinal beam 200, that is, the first mounting structure 62 is located on the side of the first battery 11 closer to the vehicle bottom longitudinal beam 200. This makes the distance between the first mounting structures 62 on the two first parts 11a relatively close, which can easily improve the relative positional accuracy of the first mounting structures 62 on both sides of the vehicle bottom longitudinal beam 200, reduce the processing difficulty, and when replacing the first battery 11, the high relative positional accuracy of the first mounting structures 62 on both sides makes it easy for the first mounting structures 62 on both sides to be aligned, thereby reducing the difficulty of battery replacement and improving battery replacement efficiency.

[0100] In some embodiments, such as Figures 7-11 As shown, the first mounting structure 62 on the first part 11a, located between the first part 11a and the outer side of the vehicle undercarriage longitudinal beam 200, can be configured to be detachably connected to the vehicle undercarriage longitudinal beam 200. This simplifies the structural design and improves installation efficiency.

[0101] It should be noted that the connection method between the first mounting structure 62 and the vehicle undercarriage longitudinal beam 200 is not limited. It can be directly connected to the portion of the vehicle undercarriage longitudinal beam 200 facing the first mounting structure 62, or it can be indirectly connected to the connecting structure 300 provided on the vehicle undercarriage longitudinal beam 200 facing the first mounting structure 62. Furthermore, it should be noted that the connection position between the first mounting structure 62 and the vehicle undercarriage longitudinal beam 200 is not limited; for example, it can be connected to at least one of the top, bottom, or side of the vehicle undercarriage longitudinal beam 200.

[0102] In some embodiments, such as Figure 7 and Figure 11 As shown, the first mounting structure 62 includes a plurality of sub-mounting parts 61 arranged at intervals along the longitudinal direction.

[0103] This helps to improve the dispersion and uniformity of stress distribution, alleviate the stress concentration problem in the sub-mounting parts 61, and enhance the connection reliability of each sub-mounting part 61, thereby improving the installation stability and reliability of the first battery 11. Furthermore, since the multiple sub-mounting parts 61 are all located between the outer surface of the first part 11a and the longitudinal beam 200 of the vehicle floor, the distance between the multiple sub-mounting parts 61 on the two first parts 11a is relatively close. This makes it easy to improve the relative positional accuracy of the multiple sub-mounting parts 61, reduce processing difficulty, and when replacing the first battery 11, the high relative positional accuracy of the multiple sub-mounting parts 61 allows for easy alignment of each sub-mounting part 61, thereby reducing the difficulty of battery replacement and improving battery replacement efficiency.

[0104] In some embodiments, each first mounting structure 62 includes 2-3 sub-mounting parts 61. Specifically, since the battery assembly 100 includes multiple batteries 1, and the size of each battery 1 can be relatively small, the number of sub-mounting parts 61 can be relatively reduced, for example, to 2-3, etc. This can better reduce the force on each sub-mounting part 61, ensure the installation reliability of the first battery 11, and make it easier to control the relative positional accuracy of the multiple sub-mounting parts 61, making it easier to align and install each sub-mounting part 61 with the vehicle 1000, reducing installation difficulty and improving installation efficiency.

[0105] In some embodiments, such as Figure 11As shown, the longitudinal dimension L4 of the first part 11a is smaller than the lateral dimension L5 of the first battery 11. That is, the lateral dimension L5 of the first battery 11 is relatively large, while the longitudinal dimension L5 of the first part 11a is relatively small. When the lateral dimension L5 of the first battery 11 cannot exceed the lateral width of the vehicle 1000, the longitudinal dimension L4 of the first part 11a can be ensured not to be too large. The size of the first battery 11 is relatively small, so the number of sub-mounting parts 61 can be relatively reduced, thereby reducing the stress on each sub-mounting part 61, ensuring the installation reliability of the first battery 11, and making it easier to control the relative positional accuracy of multiple sub-mounting parts 61, making it easier to align and install each sub-mounting part 61 with the vehicle 1000, reducing installation difficulty and improving installation efficiency.

[0106] In some embodiments, such as Figures 7-11 As shown, the two first parts 11a are symmetrically arranged, meaning that the first part 11a on one side of the longitudinal beam 200 on the vehicle bottom is the same as and symmetrically arranged on the other side of the longitudinal beam 200 on the vehicle bottom. This helps to achieve a balance of the center of gravity on both sides of the first battery 11, resulting in a more balanced force on each of the first mounting structures 62 and improving the installation reliability of the first battery 11. Furthermore, the symmetrical arrangement of the two first parts 11a simplifies the design and manufacturing of the first battery 11, reduces costs, and improves production efficiency.

[0107] In some embodiments, such as Figures 7-10 As shown, the first part 11a includes one or multiple first battery layers 21 arranged vertically, and multiple first battery units 31 of equal height are arranged side by side to form a first battery layer 21. The first battery unit 31 includes at least one first battery cell 41.

[0108] In the above embodiments, the first part 11a may include only one first battery layer 21, or the first part 11a may also include multiple first battery layers 21, and the multiple first battery layers 21 are arranged vertically.

[0109] In the above embodiments, when the first battery unit 31 includes multiple first battery cells 41, it means that the multiple first battery units 31 can be arranged in groups, which is conducive to modular production, improves production efficiency, and simplifies current conduction, etc.; while when the first battery unit 31 includes only one first battery cell 41, it means that the multiple first battery units 31 are not arranged in groups, thereby eliminating the need for fixing plates for grouping, thus saving space and increasing the energy density of the first battery 11.

[0110] In the above embodiments, multiple first battery cells 31 are arranged at the same height in a regular manner along the horizontal direction to form a first battery layer 21. For example, multiple first battery cells 31 are arranged sequentially in the horizontal direction, or multiple first battery cells 31 are arranged sequentially in the vertical direction, or multiple battery modules are arranged in multiple rows and columns in both the horizontal and vertical directions, etc. In addition, multiple first battery cells 31 can be connected in series, or in parallel, or in a mixed manner, etc.

[0111] Therefore, since the first part 11a includes one or more first battery layers 21 arranged vertically, it is advantageous to control the height of the first part 11a. For example, when a higher height of the first part 11a is required, the requirement can be met by increasing the height or number of first battery layers 21, while when a lower height of the first part 11a is required, the requirement can be met by decreasing the height or number of first battery layers 21. Moreover, the height of the first part 11a can also be made to meet the requirements by combining several first battery layers 21 with different heights.

[0112] In some embodiments, such as Figures 7-10 As shown, the first battery 11 also includes a second part 11b, which connects the two first parts 11a, and the top surface of the second part 11b is lower than the top surface of the first part 11a, so as to form a recess 10 between the first part 11a and the two second parts 11b suitable for accommodating the underbody longitudinal beam 200.

[0113] Therefore, by setting the second part 11b to connect the two first parts 11a, the two first parts 11a and the second part 11b of the first battery 11 form a whole, which is beneficial for the simultaneous installation of the two first parts 11a and improves the installation efficiency of the first battery 11. Furthermore, since the top surface of the second part 11b is lower than the top surface of the first part 11a, the second part 11b can avoid the undercarriage longitudinal beam 200. This allows the first battery 11 to be installed by lifting it upwards, without the second part 11b interfering with the undercarriage longitudinal beam 200. Moreover, when removing the first battery 11 from the vehicle 1000, the first battery 11 can be pulled downwards without the second part 11b interfering with the undercarriage longitudinal beam 200. This simplifies the structure of the first battery 11 and facilitates the installation and removal of the first battery 11 from the vehicle 1000.

[0114] It is worth noting that "recess 10 is suitable for accommodating the underbody longitudinal beam 200" means that at least a portion of the underbody longitudinal beam 200 extends into the recess 10, not that the entire underbody longitudinal beam 200 is located within the recess 10. More specifically, a section of the underbody longitudinal beam 200 may extend into the recess 10 in the longitudinal direction, and further, this section may extend partially or entirely into the recess 10 in the vertical direction. Furthermore, it should be noted that the housing of the first part 11a and the housing of the second part 11b can be a single piece or separate pieces; no limitation is made here.

[0115] In some embodiments, such as Figures 7-11 As shown, the top surface of the second part 11b is adapted to be lower than the longitudinal beam 200 of the vehicle floor, and the top surface of the second part 11b has a first docking structure 75, which is adapted to extend between the two longitudinal beams 201 of the longitudinal beam 200 of the vehicle floor and is used to dock with the vehicle 1000 to achieve current conduction and / or liquid conduction.

[0116] In the above embodiments, a first docking structure 75 is provided on the second part 11b, which can dock with the vehicle 1000 to achieve current conduction, liquid conduction, or both current conduction and liquid conduction. For example, when the first docking structure 75 achieves current conduction, current transfer between the vehicle 1000 and the battery 1 can be realized, enabling the battery 1 to supply power to the vehicle 1000 and the vehicle 1000 to control the battery 1. For example, when the first docking structure 75 achieves liquid conduction, heat transfer between the refrigerant system of the vehicle 1000 and the battery 1 can be realized, thereby using the refrigerant system to regulate the temperature of the battery 1 to improve the working reliability and safety of the battery 1, or the refrigerant system can absorb the waste heat of the battery 1 to meet the heat source requirements of the vehicle 1000's heat pump air conditioning system, etc., which will not be elaborated here.

[0117] In the above embodiment, when the top surface of the second part 11b is lower than the longitudinal beam 200 of the vehicle bottom, it indicates that when the first battery 11 and the vehicle 1000 are installed in place, any position of the top surface of the second part 11b is not higher than the bottom surface of the longitudinal beam 200 of the vehicle bottom. Thus, sufficient space is reserved above the second part 11b to accommodate the first docking structure 75. Since the first docking structure 75 is located on the top surface of the second part 11b, it can utilize the space within the recess 10. This provides protection for the first docking structure 75 from the recess 10, preventing damage from impacts and corrosion from splashed mud and water during vehicle 1000 operation. Furthermore, it avoids the first docking structure 75 occupying space outside the first battery 11, thereby improving the energy density of the first battery 11.

[0118] In the above embodiment, the vehicle bottom longitudinal beam 200 may include two parallel longitudinal beams 201, both of which extend into the recess 10. The first docking structure 75 can extend into the space between the two longitudinal beams 201, thereby more effectively avoiding the first docking structure 75 occupying other space, and thus utilizing the saved space to increase the energy density of the first battery 11.

[0119] In some embodiments, such as Figure 7 and Figure 8 As shown, the first docking structure 75 has its docking surface facing upwards and is vertically docked. Therefore, when installing the first battery 11, it can be lifted upwards, allowing the first docking structure 75 to dock smoothly into place. When removing the first battery 11, it can be pulled downwards, allowing the first docking structure 75 to disengage smoothly, thus simplifying the battery swapping operation and improving the battery swapping efficiency. Furthermore, this docking method requires less space, saving space occupied by the docking and contributing to increased energy density of the first battery 11.

[0120] In some embodiments, the mating surface of the first mating structure 75 faces the horizontal direction for horizontal mating. Thus, when installing the first battery 11, the first battery 11 can be lifted upwards first, and then pushed horizontally (e.g., horizontally forward or backward) to complete the mating, thereby meeting different design requirements.

[0121] In some embodiments, combined with Figure 10 and Figure 11 The first docking structure 75 is located at the longitudinal center of the first battery 11. Therefore, by centrally positioning the first docking structure 75 longitudinally, it facilitates the connection between the first battery cells 41 or temperature regulating plates 8 within the first battery 11 and the first docking structure 75, simplifying the connection path and saving space. This allows for the arrangement of more or larger-volume first battery cells 41 within the first battery 11, thereby increasing the energy density of the first battery 11. Furthermore, centrally positioning the first docking structure 75 longitudinally helps to center the center of gravity of the first battery 11 longitudinally, resulting in a more uniform stress distribution on each of the first mounting structures 62 on the first battery 11. This improves stress concentration issues in the first mounting structures 62 and enhances the reliability and stability of the connection between the first battery 11 and the longitudinal beam 200 of the vehicle floor.

[0122] In some embodiments, combined with Figure 10 and Figure 11The first docking structure 75 can be located at the lateral center of the top of the first battery 11. Therefore, by centering the first docking structure 75 laterally, it facilitates the connection between the first battery cell 41 or temperature regulating plate 8 within the first battery 11 and the first docking structure 75, simplifying the connection path and saving space required for the connection path. This allows for the arrangement of more or larger volumes of the first battery cells 41 within the first battery 11, thereby increasing the energy density of the first battery 11. Furthermore, centering the first docking structure 75 laterally helps to center the center of gravity of the first battery 11 laterally, resulting in a more uniform stress distribution on each of the first mounting structures 62 on the first battery 11. This improves issues such as stress concentration in the first mounting structures 62 and enhances the reliability and stability of the connection between the first battery 11 and the longitudinal beam 200 of the vehicle floor.

[0123] It is worth noting that the first battery cell 41 may or may not be provided in the second part 11b. For example, if the first battery cell 41 is provided, the energy density of the battery 1 can be increased; while if the first battery cell 41 is not provided, the height of the first battery 11 above the ground can be increased, thus protecting the first battery 11, and the space can be used to install other structural components, etc.

[0124] In some embodiments, such as Figures 7-10 As shown, the second part 11b includes one or multiple first battery layers 21 arranged vertically. The first battery layer 21 includes a plurality of first battery cells 31 arranged side by side. The first battery cell 31 includes at least one first battery cell 41.

[0125] In the above embodiments, the second part 11b may include only one first battery layer 21, or the second part 11b may also include multiple first battery layers 21, and the multiple first battery layers 21 are arranged vertically.

[0126] In the above embodiments, when the first battery unit 31 includes multiple first battery cells 41, it means that the multiple first battery units 31 can be arranged in groups, which is conducive to modular production, improves production efficiency, and simplifies current conduction, etc.; while when the first battery unit 31 includes only one first battery cell 41, it means that the multiple first battery units 31 are not arranged in groups, thereby eliminating the need for fixing plates for grouping, thus saving space and increasing the energy density of the first battery 11.

[0127] In the above embodiments, multiple first battery cells 31 are arranged at the same height in a regular manner along the horizontal direction to form a first battery layer 21. For example, multiple first battery cells 31 are arranged sequentially in the horizontal direction, or multiple first battery cells 31 are arranged sequentially in the vertical direction, or multiple battery modules are arranged in multiple rows and columns in both the horizontal and vertical directions, etc. In addition, multiple first battery cells 31 can be connected in series, or in parallel, or in a mixed manner, etc.

[0128] Therefore, since the second part 11b includes one or more first battery layers 21 arranged vertically, it is advantageous to control the height of the second part 11b. For example, when a higher height of the second part 11b is required, the requirement can be met by increasing the height or number of first battery layers 21, while when a lower height of the second part 11b is required, the requirement can be met by decreasing the height or number of first battery layers 21. Moreover, the height of the second part 11b can also be made to meet the requirements by combining several first battery layers 21 with different heights.

[0129] In some embodiments, combined with Figures 7-10 The first part 11a also includes one or more first battery layers 21 arranged vertically, and the total height H4 of the first battery cells 41 contained in the first part 11a is greater than the total height H3 of the first battery cells 41 contained in the second part 11b.

[0130] In the above embodiments, when both the first part 11a and the second part 11b include one layer or multiple layers of first battery layers 21 arranged vertically, the number of layers or layer height of the first battery layers 21 in the first part 11a and the second part 11b can be controlled respectively, or first battery layers 21 with different layer heights can be combined to simply and effectively ensure that the total height of the first battery cells 41 contained in the first part 11a is greater than the total height of the first battery cells 41 contained in the second part 11b, thereby making full use of space and improving the energy density of the battery 1.

[0131] In the above embodiment, since the first part 11a is located on the lateral side of the transverse longitudinal beam 201 and the second part 11b is located below the vehicle bottom longitudinal beam 200, by setting the total height of the first battery cell 41 contained in the first part 11a to be greater than the total height of the first battery cell 41 contained in the second part 11b, the first battery 11 can make full use of the space on the side and bottom of the vehicle bottom longitudinal beam 200 to arrange the first battery cell 41, which is beneficial to improving the energy density of the first battery 11.

[0132] In some embodiments, the bottom surface of the first part 11a is flush with the bottom surface of the second part 11b. For example, the bottom first battery layer 21 in the first part 11a and the bottom first battery layer 21 in the second part 11b can be flush with each other, so that the ground height of the first battery 11 can be easily guaranteed, the first battery 11 can be better included, and the battery swapping operation of the first battery 11 is beneficial.

[0133] In some embodiments, the number of first battery layers 21 in the first portion 11a is greater than the number of first battery layers 21 in the second portion 11b. Therefore, when the height of each first battery layer 21 in the first portion 11a is the same as or nearly the same as the height of each first battery layer 21 in the second portion 11b, the total height of the first battery cells 41 contained in the first portion 11a can be easily increased to be greater than the total height of the first battery cells 41 contained in the second portion 11b by controlling the number of layers. This facilitates full utilization of space and improves the energy density of the battery 1.

[0134] In some embodiments, the height of each first battery layer 21 in the first portion 11a is the same as the height of each first battery layer 21 in the second portion 11b. Therefore, since the height of each first battery layer 21 in the first portion 11a is the same as the height of each first battery layer 21 in the second portion 11b, the positions of each first battery cell 31 can be interchanged, reducing assembly difficulty. Furthermore, each first battery cell 31 can be assembled using first battery cells 41 of the same specification, simplifying the overall design and reducing costs.

[0135] Alternatively, in some other embodiments, the height of at least one first battery layer 21 in the first portion 11a differs from the height of at least one first battery layer 21 in the second portion 11b. For example, the height of at least one first battery layer 21 in the first portion 11a is greater than the height of at least one first battery layer 21 in the second portion 11b. Yet another example is that the height of at least one first battery layer 21 in the first portion 11a is less than the height of at least one first battery layer 21 in the second portion 11b. This allows for flexible design to meet different design requirements.

[0136] Specifically, the height of the first battery layer 21 refers to the vertical dimension of the first battery layer 21, which is determined according to the arrangement of the first battery units 31 included in the first battery layer 21. For example, when the length direction of the first battery unit 31 is arranged vertically, the length of the first battery unit 31 is the height of the first battery layer 21. For another example, when the thickness direction of the first battery unit 31 is arranged vertically, the thickness of the first battery unit 31 is the height of the first battery layer 21. For yet another example, when the width direction of the first battery unit 31 is arranged vertically, the width of the first battery unit 31 is the height of the first battery layer 21.

[0137] Therefore, when the heights of the two first battery layers 21 are different, there can be multiple arrangements. For example, the first battery units 31 included in the two first battery layers 21 can be arranged in the same way but with different specifications. For instance, the length direction of the two first battery units 31 is both vertical, the width direction is both horizontal, and the thickness direction is both vertical, but the thickness of the two first battery units 31 is different. Another example is that the first battery units 31 included in the two first battery layers 21 can be arranged in different ways but with the same specifications. For instance, the length, width, and height of the two first battery units 31 are the same, but the length of one first battery unit 31 is vertical, and the thickness of the other first battery unit 31 is vertical, and so on.

[0138] For example, in some specific examples, the first battery layer 21 in the second part 11b is one layer, and the first battery layer 21 in the first part 11a is two layers. The height of the lower first battery layer 21 in the first part 11a is the same as the height of the first battery layer 21 in the second part 11b and is set at the same level. The height of the upper first battery layer 21 in the first part 11a is greater than or equal to the height of the lower first battery layer 21 in the first part 11a.

[0139] In the above embodiment, the height of the lower first battery layer 21 in the first part 11a and the height of the first battery layer 21 in the second part 11b being the same and flush means that the bottom surface of the lower first battery layer 21 in the first part 11a is flush with the bottom surface of the first battery layer 21 in the second part 11b, and the top surface of the lower first battery layer 21 in the first part 11a is flush with the top surface of the first battery layer 21 in the second part 11b.

[0140] Therefore, space can be fully utilized and the arrangement of the first battery cells 31 can be simplified. For example, the first battery cells 31 in the lower first battery layer 21 of the first part 11a and the first battery cells 31 in the first battery layer 21 of the second part 11b can be interchanged. Moreover, the total height of the first battery cells 41 contained in the first part 11a can be effectively ensured to be greater than the total height of the first battery cells 41 contained in the second part 11b, which is conducive to making full use of space and improving the energy density of the battery 1. In addition, the distance between the first battery 11 and the ground can be kept sufficient, which is beneficial for battery swapping and protecting the battery 1 from impacts.

[0141] In some embodiments, the first portion 11a is provided with multiple first battery layers 21, and the arrangement direction of the plurality of first battery cells 31 in at least two of the first battery layers 21 is perpendicular. For example, the plurality of first battery cells 31 in at least one first battery layer 21 in the first portion 11a are arranged sequentially in the horizontal direction, and the plurality of first battery cells 31 in at least one other first battery layer 21 in the first portion 11a are arranged sequentially in the vertical direction.

[0142] Alternatively, in some other embodiments, the first portion 11a may have multiple first battery layers 21, wherein the arrangement direction of the plurality of first battery cells 31 in each first battery layer 21 is consistent. For example, the plurality of first battery cells 31 in each first battery layer 21 in the first portion 11a may be arranged sequentially in a horizontal direction. Another example is that the plurality of first battery cells 31 in each first battery layer 21 in the first portion 11a may be arranged sequentially in a vertical direction.

[0143] Therefore, the first battery cells 31 within the first part 11a can be flexibly arranged to meet different practical needs.

[0144] In some embodiments, the second portion 11b contains a first battery layer 21, and the arrangement direction of the plurality of first battery cells 31 in the first battery layer 21 of the second portion 11b is consistent with the arrangement direction of the plurality of first battery cells 31 in at least one first battery layer 21 of the first portion 11a. For example, if the plurality of first battery cells 31 in the first battery layer 21 of the second portion 11b are arranged sequentially in a horizontal direction, the plurality of first battery cells 31 in at least one first battery layer 21 of the first portion 11a are also arranged sequentially in a horizontal direction. Alternatively, if the plurality of first battery cells 31 in the first battery layer 21 of the second portion 11b are arranged sequentially in a vertical direction, the plurality of first battery cells 31 in at least one first battery layer 21 of the first portion 11a are also arranged sequentially in a vertical direction.

[0145] Alternatively, in some other embodiments, the second portion 11b may contain a first battery layer 21, and the arrangement direction of the plurality of first battery cells 31 in the first battery layer 21 of the second portion 11b is perpendicular to the arrangement direction of the plurality of first battery cells 31 in at least one first battery layer 21 of the first portion 11a. For example, the plurality of first battery cells 31 in the first battery layer 21 of the second portion 11b may be arranged sequentially in a horizontal direction, while the plurality of first battery cells 31 in at least one first battery layer 21 of the first portion 11a may be arranged sequentially in a vertical direction. Another example is that the plurality of first battery cells 31 in the first battery layer 21 of the second portion 11b may be arranged sequentially in a vertical direction, while the plurality of first battery cells 31 in at least one first battery layer 21 of the first portion 11a may be arranged sequentially in a horizontal direction.

[0146] Therefore, the first battery cells 31 in the second part 11b and the first part 11a can be flexibly arranged to meet different practical needs.

[0147] In some embodiments, a plurality of first battery cells 31 in at least one first battery layer 21 are arranged longitudinally, and each first battery cell 31 extends laterally in the length direction. Thus, space can be fully utilized, and the first battery cells 31 are easily arranged to form the first battery layer 21.

[0148] In some embodiments, a plurality of first battery cells 31 in at least one first battery layer 21 are arranged laterally, and each first battery cell 31 extends longitudinally along its length direction. This allows for full utilization of space, and the first battery cells 31 are easily arranged to form the first battery layer 21.

[0149] This allows for a flexible design of the first battery layer 21 to meet different practical needs.

[0150] In some embodiments, at least one first battery cell 31 includes a plurality of first battery cells 41, and the plurality of first battery cells 41 are arranged along one of the length direction, width direction and thickness direction of the first battery cell 31.

[0151] For example, the plurality of first battery cells 41 included in at least one first battery cell 31 are arranged along the length direction of the first battery cell 31. Another example is that the plurality of first battery cells 41 included in at least one first battery cell 31 are arranged along the width direction of the first battery cell 31. Yet another example is that the plurality of first battery cells 41 included in at least one first battery cell 31 are arranged along the thickness direction of the first battery cell 31. Therefore, the first battery cell 31 can be flexibly designed to meet different practical needs.

[0152] In some embodiments, such as Figures 2-7 As shown, at least two of the multiple batteries 1 included in the battery assembly 100 are first batteries 11, and all the first batteries 11 are adapted to be arranged sequentially along the longitudinal direction of the vehicle 1000. Thus, space can be utilized more fully, the arrangement of the multiple first batteries 11 will not interfere with each other, and each first battery 11 can be individually installed and removed from the vehicle 1000.

[0153] In the above embodiments, the number of first batteries 11 is not limited and can be matched according to different vehicle models and different mileages to meet the battery output requirements. For example, it can be specifically set according to the size of the first battery 11 itself and the wheelbase of the vehicle 1000, such as two, three, four, etc., so as to ensure that the number of first batteries 11 is not too much or too little, which is conducive to flexible battery swapping operation according to different vehicle models and mileages.

[0154] In some embodiments, combined with Figure 3 and Figure 7 A clearance gap is provided between two adjacent first batteries 11. This allows the unlocking device to extend between the two first batteries 11 through the clearance gap, facilitating the installation or unlocking of the first batteries 11. Furthermore, by providing the clearance gap, the problem of adjacent first batteries 11 bumping into each other can be avoided, reducing design precision and installation difficulty. In the above embodiment, the size of the clearance gap is not limited, as long as the clearance gap does not waste too much space while ensuring sufficient space for locking and unlocking operations.

[0155] It should be noted that the multiple first batteries 11 can be identical or different. For example, in some embodiments, each first battery 11 has the same specifications, that is, any two first batteries 11 are exactly the same. This can reduce production costs and make simple and effective use of space to improve the energy density of the battery assembly 100.

[0156] For example, in some other embodiments, at least two first batteries 11 have different specifications. For instance, they may have different sizes, different capacities, or both different sizes and different capacities. When the sizes are different, the specific structural design can be tailored to the underbody structure of the vehicle 1000 to make full use of space. When the capacities are different, the first battery 11 with a suitable capacity can be replaced according to the mileage of the vehicle 1000, and so on. Thus, flexible configuration is possible.

[0157] In some embodiments, such as Figure 12 As shown, at least one of the plurality of batteries 1 included in the battery assembly 100 is a second battery 12. The second battery 12 is adapted to be located on one side of the transverse longitudinal beam 200 of the vehicle floor, and the top surface of the second battery 12 is higher than the bottom surface of the longitudinal beam 200 of the vehicle floor. The second battery 12 includes at least one second battery cell 42.

[0158] In the above embodiments, at least one second battery 12 can be provided on one lateral side of the longitudinal beam 200 under the vehicle, and / or at least one second battery 12 can be provided on the other lateral side of the longitudinal beam 200 under the vehicle. Therefore, the placement of the second battery 12 is flexible, cleverly utilizing space and facilitating installation. Furthermore, the size of the second battery 12 can be designed to be smaller, which is beneficial for the battery swapping needs of short-distance driving.

[0159] In the above embodiment, the top surface of the second battery 12 is higher than the height center of the longitudinal beam 200, while the bottom surface of the second battery 12 can be lower than, flush with, or higher than the bottom surface of the longitudinal beam 200, thereby placing the second battery 12 on one lateral side of the longitudinal beam 200 to utilize the space at that location. Thus, the second battery 12 can make full use of the space on one lateral side of the longitudinal beam 200 to accommodate a larger number of second battery cells 42, thereby ensuring a higher energy density of the second battery 12. Alternatively, it can increase the ground clearance of the second battery 12, ensuring sufficient space between the bottom of the second battery 12 and the ground for battery swapping operations. Furthermore, the increased ground clearance reduces the risk of damage or scratches to the bottom of the second battery 12 due to ground protrusions, improving the safety and lifespan of the second battery 12. In summary, the second battery 12 with the above structure effectively solves the problem of low space utilization, improves the safety and reliability of the second battery 12, and facilitates battery swapping.

[0160] In some embodiments, such as Figure 12 As shown, the mounting structure 6 includes a second mounting structure 63 disposed on the second battery 12, and the second mounting structure 63 is located between the second battery 1 and the outer side of the vehicle underbody longitudinal beam 200.

[0161] Therefore, since the second mounting structure 63 on the second battery 12 is located between the second battery 12 and the outer side of the vehicle under longitudinal beam 200, the position of the second mounting structure 63 is relatively concealed and can be protected, avoiding damage to the second mounting structure 63 from bumps and collisions, improving the installation reliability of the battery 1, and also preventing the second mounting structure 63 from being corroded by splashed mud and water during the operation of the vehicle 1000, which could lead to problems such as the inability to replace it.

[0162] It is worth noting that specific optional examples of the second mounting structure 63 can be found in the design of the first mounting structure 62, and will not be elaborated here. For example, the second mounting structure 63 includes a plurality of sub-mounting parts 61 arranged at intervals along the longitudinal direction, etc.

[0163] In some embodiments, such as Figure 12 As shown, the second battery 12 includes one layer or multiple layers of second battery layers 22 arranged vertically. The second battery layer 22 includes a plurality of second battery units 32 arranged side by side. The second battery unit 32 includes at least one second battery cell 42.

[0164] In the above embodiments, the second battery 12 may include only one second battery layer 22, or the second battery 12 may also include multiple second battery layers 22, and the multiple second battery layers 22 are arranged vertically.

[0165] In the above embodiments, when the second battery unit 32 includes multiple second battery cells 42, it means that the multiple second battery units 32 can be arranged in groups, which is beneficial for modular production, improving production efficiency, and simplifying current conduction, etc.; while when the second battery unit 32 includes only one second battery cell 42, it means that the multiple second battery units 32 are not arranged in groups, thereby eliminating the need for fixing plates for grouping, thus saving space and increasing the energy density of the second battery 12.

[0166] In the above embodiments, multiple second battery units 32 are arranged at the same height in a regular manner along the horizontal direction to form a second battery layer 22. For example, multiple second battery units 32 are arranged sequentially in the horizontal direction, or multiple second battery units 32 are arranged sequentially in the vertical direction, or multiple battery modules are arranged in multiple rows and columns in both the horizontal and vertical directions, etc. In addition, multiple second battery units 32 can be connected in series, in parallel, or in a mixed manner, etc.

[0167] Therefore, since the second battery 12 includes one or multiple layers 22 arranged vertically, it is advantageous to control the height of the second battery 12. For example, when a higher height of the second battery 12 is required, the requirement can be met by increasing the height or number of layers of the second battery layer 22, while when a lower height of the second battery 12 is required, the requirement can be met by decreasing the height or number of layers of the second battery layer 22. Moreover, the height of the second battery 12 can be made to meet the requirements by combining several second battery layers 22 with different heights.

[0168] It is worth noting that specific examples of the second battery layer 22 can refer to the design of the first battery layer 21, and will not be elaborated here. Specific examples of the second battery cell 32 can refer to the design of the first battery cell 31, and will not be elaborated here.

[0169] In some embodiments, such as Figure 12 and Figure 13 As shown, at least one of the multiple batteries 1 is a third battery 13. The third battery 13 includes a third part 13a and a fourth part 13b. Both the third part 13a and the fourth part 13b include at least one third battery cell 43. The fourth part 13b is a single cell and is located on one lateral side of the third part 13a. The top surface of the fourth part 13b is higher than the top surface of the third part 13a. The top surface of the third part 13a is adapted to be lower than the bottom surface of the vehicle under longitudinal beam 200. The third part 13a is adapted to be located below the vehicle under longitudinal beam 200 of the vehicle 1000. The fourth part 13b is adapted to be located on one lateral side of the vehicle under longitudinal beam 200. The top surface of the fourth part 13b is adapted to be higher than the bottom surface of the vehicle under longitudinal beam 200.

[0170] Therefore, the third part 13a and the fourth part 13b can avoid the underbody longitudinal beam 200, making full use of the space below and on the lateral sides of the underbody longitudinal beam 200 to install the third battery cell 43. This ensures a high energy density for the third battery 13, or increases the ground clearance of the third battery 13, ensuring sufficient space between the bottom of the third battery 13 and the ground for battery swapping operations. Furthermore, the increased ground clearance reduces the risk of damage or scratches to the bottom of the third battery 13 due to ground protrusions, improving its safety and lifespan. In summary, the above-described structure of the third battery 13 effectively solves the problem of low space utilization, improves the safety and reliability of the third battery 13, and facilitates battery swapping.

[0171] It is worth noting that specific optional examples for Part 3, 13a can be found in the design of Part 2, 11b, and will not be elaborated upon here. Specific optional examples for Part 4, 13b can be found in the design of Part 1, 11a, and will not be elaborated upon here. For example, the top surface of Part 4, 13b may be adapted to be higher than the center of the longitudinal beam 200mm above the vehicle's undercarriage.

[0172] In some embodiments, the mounting structure 6 includes a third mounting structure 64 disposed on the third portion 13a and / or the fourth portion 13b, the third mounting structure 64 being located between the third battery 13 and the longitudinal beam 200 of the vehicle floor.

[0173] For example, the mounting structure 6 includes a third mounting structure 64 disposed on the third part 13a, which is located between the third part 13a and the bottom surface of the vehicle undercarriage longitudinal beam 200. Therefore, since the third mounting structure 64 is located between the third part 13a and the bottom surface of the vehicle undercarriage longitudinal beam 200, its position is relatively concealed and protected, preventing damage from impacts and improving the installation reliability of the third battery 13. Furthermore, it prevents the third mounting structure 64 from being corroded by splashed mud and water during vehicle 1000 operation, thus avoiding problems such as the inability to replace it.

[0174] For example, the mounting structure 6 includes a third mounting structure 64 disposed on the fourth part 13b, which is located between the fourth part 13b and the outer side of the vehicle underbody longitudinal beam 200. Therefore, since the third mounting structure 64 is located between the fourth part 13b and the outer side of the vehicle underbody longitudinal beam 200, its position is relatively concealed and protected, preventing damage from impacts and improving the installation reliability of the third battery 13. Furthermore, it prevents the third mounting structure 64 from being corroded by splashed mud and water during vehicle 1000 operation, thus avoiding problems such as the inability to replace it.

[0175] For example, the mounting structure 6 includes a third mounting structure 64 disposed on the third part 13a, located between the third part 13a and the bottom surface of the vehicle undercarriage longitudinal beam 200. Simultaneously, the mounting structure 6 also includes a third mounting structure 64 disposed on the fourth part 13b, located between the fourth part 13b and the outer surface of the vehicle undercarriage longitudinal beam 200. This effectively improves the connection reliability of the third battery 13.

[0176] It is worth noting that specific optional examples of the third mounting structure 64 can be found in the design of the first mounting structure 62, and will not be elaborated here. The third mounting structure 64 includes a plurality of sub-mounting parts 61 arranged longitudinally at intervals, etc.

[0177] In some embodiments, such as Figure 12 and Figure 13 As shown, the top surface of the third part 13a has a second docking structure 76, which is adapted to extend between the two longitudinal beams 201 of the vehicle underbody longitudinal beam 200 and is used to dock with the vehicle 1000 to achieve current conduction and / or liquid conduction.

[0178] In the above embodiments, a second docking structure 76, which can dock with the vehicle 1000, is provided on the third part 13a to achieve current conduction, liquid conduction, or both. For example, when the second docking structure 76 achieves current conduction, current transfer between the vehicle 1000 and the battery 1 can be realized, enabling the battery 1 to supply power to the vehicle 1000 and the vehicle 1000 to control the battery 1. For example, when the second docking structure 76 achieves liquid conduction, heat transfer between the refrigerant system of the vehicle 1000 and the battery 1 can be realized, thereby using the refrigerant system to regulate the temperature of the battery 1 to improve the operational reliability and safety of the battery 1, or the refrigerant system can absorb the waste heat of the battery 1 to meet the heat source requirements of the vehicle 1000's heat pump air conditioning system, etc., which will not be elaborated here.

[0179] In the above embodiment, when the top surface of the third part 13a is lower than the longitudinal beam 200 of the vehicle floor, it means that when the third battery 13 is installed in place with the vehicle 1000, any position of the top surface of the third part 13a is not higher than the bottom surface of the longitudinal beam 200 of the vehicle floor. This allows sufficient space above the third part 13a to accommodate the second docking structure 76. Since the second docking structure 76 is located on the top surface of the third part 13a, it is protected from impact damage and corrosion by splashed mud and water during vehicle 1000 operation. Furthermore, it avoids occupying space outside the third battery 13, thus improving the energy density of the third battery 13.

[0180] In the above embodiment, the vehicle bottom longitudinal beam 200 may include two parallel longitudinal beams 201, and the second docking structure 76 may extend into the space between the two longitudinal beams 201, thereby more effectively avoiding the second docking structure 76 occupying other space, and thus utilizing the saved space to increase the energy density of the third battery 13.

[0181] It is worth noting that specific optional examples of the second docking structure 76 on the third battery 13 can refer to the design of the first docking structure 75 on the first battery 11, and will not be elaborated here. For example, the docking surface of the second docking structure 76 faces upwards for vertical docking, or the docking surface of the first docking structure 75 faces horizontally for horizontal docking, and so on.

[0182] In some embodiments, such as Figure 12 and Figure 13 As shown, both the third part 13a and the fourth part 13b include one layer or multiple layers of third battery layers 23 arranged vertically. The third battery layer 23 includes multiple third battery units 33 arranged side by side. Each third battery unit 33 includes at least one third battery cell 43. The total height H6 of the third battery cells 43 contained in the fourth part 13b is greater than the total height H5 of the third battery cells 43 contained in the third part 13a.

[0183] In the above embodiments, when the third battery unit 33 includes multiple third battery cells 43, it means that the multiple third battery units 33 can be arranged in groups, which is beneficial for modular production, improving production efficiency, and simplifying current conduction, etc.; while when the third battery unit 33 includes only one third battery cell 43, it means that the multiple third battery units 33 are not arranged in groups, thereby eliminating the need for fixing plates for grouping, thus saving space and increasing the energy density of the third battery 13.

[0184] In the above embodiments, multiple third battery units 33 are arranged at the same height in a regular manner along the horizontal direction to form a third battery layer 23. For example, multiple third battery units 33 are arranged sequentially in the horizontal direction, or multiple third battery units 33 are arranged sequentially in the vertical direction, or multiple battery modules are arranged in multiple rows and columns in both the horizontal and vertical directions, etc. In addition, multiple third battery units 33 can be connected in series, in parallel, or in a mixed manner, etc.

[0185] Therefore, since both the third part 13a and the fourth part 13b include one or more vertically arranged third battery layers 23, it is advantageous to control the height of the third part 13a and the fourth part 13b. For example, when a higher height is required for the third part 13a or the fourth part 13b, the requirement can be met by increasing the height or number of the corresponding third battery layers 23; conversely, when a lower height is required for the third part 13a or the fourth part 13b, the requirement can be met by decreasing the height or number of the corresponding third battery layers 23. Furthermore, the height of the third part 13a or the fourth part 13b can be made to meet the requirements by combining several third battery layers 23 with different heights.

[0186] Furthermore, by controlling the number of layers or the height of the third battery layer 23 in the third part 13a and the fourth part 13b respectively, or by combining third battery layers 23 with different heights, it is simple and effective to ensure that the total height of the third battery cell 43 contained in the fourth part 13b is greater than the total height of the third battery cell 43 contained in the third part 13a, thereby making full use of space and improving the energy density of the third battery 13.

[0187] In the above embodiment, since the fourth part 13b is located on the lateral side of the transverse longitudinal beam 201 and the third part 13a is located below the vehicle bottom longitudinal beam 200, by setting the total height of the third battery cell 43 contained in the fourth part 13b to be greater than the total height of the third battery cell 43 contained in the third part 13a, the third battery 13 can make full use of the space on the side and bottom of the vehicle bottom longitudinal beam 200 to arrange the third battery cell 43, which is beneficial to improving the energy density of the third battery 13.

[0188] It is worth noting that specific examples of the third battery layer 23 can refer to the design of the first battery layer 21, and will not be elaborated here. Specific examples of the third battery unit 33 can refer to the design of the first battery unit 31, and will not be elaborated here.

[0189] It is worth noting that the design of the relationship between Part 3 13a and Part 4 13b can refer to the design of the relationship between Part 1 11a and Part 2 11b, which will not be elaborated here. For example, the shell of Part 3 13a and the shell of Part 4 13b can be a single piece or separate pieces, which is not limited here.

[0190] For example, the bottom surface of the fourth part 13b is flush with the bottom surface of the third part 13a. For example, the number of third battery layers 23 in the fourth part 13b is greater than the number of third battery layers 23 in the third part 13a. For example, the height of each third battery layer 23 in the fourth part 13b is the same as the height of each third battery layer 23 in the third part 13a, or the height of at least one third battery layer 23 in the fourth part 13b is different from the height of at least one third battery layer 23 in the third part 13a, such as the height of at least one third battery layer 23 in the fourth part 13b being greater than the height of at least one third battery layer 23 in the third part 13a.

[0191] In some embodiments, at least two batteries 1 differ in at least one of their capacity, shape, or size. That is, at least two batteries 1 are not exactly the same. Therefore, a suitable battery 1 can be replaced according to different application scenarios, vehicle models, mileage, etc., so as to better match driving requirements and take into account the vehicle load.

[0192] Of course, this application is not limited to this. For example, in some other embodiments, each battery 1 in the battery assembly 100 may have the same specifications, that is, each battery 1 may be exactly the same, such as in terms of size, capacity, and shape. This allows for compatible installation of multiple batteries 1, reducing the difficulty of battery swapping, improving battery swapping efficiency, and easily adapting to different environments, mileages, and vehicle models by selecting different quantities, thus providing good compatibility.

[0193] In some embodiments, the multiple batteries 1 in the battery assembly 100 may be connected in series and / or in parallel. For example, all batteries 1 may be connected in series, all batteries 1 may be connected in parallel, or multiple batteries 1 may be connected in mixed series, etc. Thus, the batteries 1 can be configured with different current conduction modes according to different environments, mileage, and vehicle models, thereby helping to meet different practical needs.

[0194] In some embodiments, such as Figure 5 As shown, each battery 1 has a power connector 741, which is adapted to be connected to the current of the vehicle 1000 or to the current of an adjacent battery 1. For example, when the power connector 741 on a battery 1 is connected to the current of the vehicle 1000, the battery 1 can directly transmit current to the vehicle 1000; for example, when the power connector 741 on a battery 1 is connected to the current of an adjacent battery 1, the battery 1 can transmit current to the vehicle 1000 through the current of the adjacent battery 1.

[0195] In short, by providing a power connector 741 on each battery 1, current can be transferred between the vehicle 1000 and the battery pack 100, enabling the battery pack 100 to supply power to the vehicle 1000 and the vehicle 1000 to control the battery 1. For example, both the first docking structure 75 and the second docking structure 76 mentioned above include a power connector 741, and the second battery 12 can also be provided with a power connector 741.

[0196] In some embodiments, the power connector 741 is located on the top surface of the battery 1 with its mating surface facing upwards. Therefore, when installing each battery 1, it can be lifted upwards, allowing the power connector 741 to connect upwards and into place. When removing each battery 1, it can be pulled downwards, allowing the power connector 741 to disconnect downwards, thus simplifying the battery swapping operation and improving the battery swapping efficiency. Furthermore, this method requires less space for connection, saving space occupied by the connection and contributing to increased energy density of the battery 1.

[0197] Of course, this application is not limited to this. For example, the power connector 741 can also be positioned on the top surface of the battery 1 with the mating surface of the power connector 741 facing the horizontal direction for horizontal mating. Thus, when installing each battery 1, each battery 1 can be lifted upwards first, and then each battery 1 can be pushed horizontally (e.g., horizontally forward or backward) to complete the mating and meet different design requirements.

[0198] In addition, since the power connector 741 is located on the top surface of the battery 1, the power connector 741 can be protected from impact damage, and can also be prevented from being corroded and malfunctioning by splashed mud and water during the operation of the vehicle 1000. Furthermore, the power connector 741 can avoid occupying the space on the outside of each battery 1, which is conducive to improving the energy density of each battery 1.

[0199] Of course, this application is not limited to this. For example, in other embodiments, the power connector 741 may be located in other positions of the battery 1, which will not be elaborated here.

[0200] In some embodiments, such as Figure 5As shown, each battery 1 has a liquid inlet connector 742, which is adapted to be in contact with the liquid in the vehicle 1000 or with the liquid in an adjacent battery 1. For example, when the liquid inlet connector 741 on a battery 1 is in contact with the liquid in the vehicle 1000, the battery 1 can directly achieve fluid transfer with the vehicle 1000, thereby enabling heat transfer between the refrigerant system of the vehicle 1000 and the battery 1. This allows the refrigerant system to regulate the temperature of the battery 1, thereby improving the operational reliability and safety of the battery 1. Alternatively, the refrigerant system can be used to absorb the waste heat of the battery 1 to meet the heat source requirements of the heat pump air conditioning system of the vehicle 1000.

[0201] For example, when the power connector 741 on a battery 1 is connected to the liquid of an adjacent battery 1, the battery 1 can be connected to the liquid of the vehicle 1000 through the adjacent battery 1, and fluid transfer can be achieved between the vehicle 1000 and the refrigerant system of the vehicle 1000. This allows for heat transfer between the refrigerant system of the vehicle 1000 and the battery 1, thereby using the refrigerant system to regulate the temperature of the battery 1, thereby improving the operational reliability and safety of the battery 1. Alternatively, the refrigerant system can be used to absorb the waste heat of the battery 1 to meet the heat source requirements of the heat pump air conditioning system of the vehicle 1000.

[0202] In short, by providing a fluid inlet connector 742 on each battery 1, fluid transfer between the vehicle 1000 and the battery pack 100 can be achieved. This allows the refrigerant system to regulate the temperature of the battery 1, thereby improving the operational reliability and safety of the battery 1. Alternatively, the refrigerant system can absorb the waste heat from the battery 1 to meet the heat source requirements of the vehicle 1000's heat pump air conditioning system. For example, both the first docking structure 75 and the second docking structure 76 mentioned above include a fluid inlet connector 742, and the second battery 12 can also be provided with a fluid inlet connector 742.

[0203] In some embodiments, the liquid inlet connector 742 is located on the top surface of the battery 1 with its mating surface facing upwards. Therefore, when installing each battery 1, the battery 1 can be lifted upwards, allowing the liquid inlet connector 742 to smoothly connect upwards into place. When removing each battery 1, the battery 1 can be pulled downwards, allowing the liquid inlet connector 742 to smoothly disconnect downwards, thus simplifying the battery swapping operation and improving the battery swapping efficiency. Furthermore, this method requires less space for connection, saving space occupied by the connection and contributing to increased energy density of the battery 1.

[0204] Of course, this application is not limited to this. For example, the liquid inlet connector 742 can also be positioned on the top surface of the battery 1 with the mating surface of the liquid inlet connector 742 facing the horizontal direction for horizontal mating. Thus, when installing each battery 1, each battery 1 can be lifted upwards first, and then each battery 1 can be pushed horizontally (e.g., pushed horizontally forward or backward) to complete the mating and meet different design requirements.

[0205] In addition, since the liquid inlet connector 742 is located on the top surface of the battery 1, the liquid inlet connector 742 can be protected from impact damage, and can also be prevented from being corroded and malfunctioning by splashed mud and water during the operation of the vehicle 1000. Furthermore, the liquid inlet connector 742 can avoid occupying the space on the outside of each battery 1, which is conducive to improving the energy density of each battery 1.

[0206] Of course, this application is not limited to this. For example, in other embodiments, the liquid inlet connector 742 may be located at other positions of the battery 1, which will not be elaborated here.

[0207] In some embodiments, such as Figure 5 As shown, the mounting structure 6 is adapted to be detachably mounted on the underbody longitudinal beam 200 of the vehicle 1000, and the mounting structure 6 is located on the side of the battery 1 facing the underbody longitudinal beam 200.

[0208] Therefore, since the mounting structure 6 on the battery 1 is located on the side of the battery 1 facing the longitudinal beam 200 of the vehicle floor, and is suitable for detachable installation on the longitudinal beam 200 of the vehicle floor of the vehicle 1000, the mounting structure 6 is located between the battery 1 and the outer side of the longitudinal beam 200 of the vehicle floor. This makes the position of the mounting structure 6 more concealed and protected, avoiding damage to the mounting structure 6 from bumps and collisions, improving the installation reliability of the battery 1, and preventing the mounting structure 6 from being corroded by splashed mud and water during the operation of the vehicle 1000, which could lead to problems such as the inability to replace it.

[0209] Furthermore, in related technologies, when a battery is installed using a battery swapping frame, multiple locking structures are provided on the outer periphery of the frame. These locking structures are located on the side of the battery furthest from the vehicle's underbody longitudinal beam, resulting in a large torque on the locking structures and low battery installation reliability. However, according to the embodiment of this application, the mounting structure 6 on battery 1 is located on the side of battery 1 facing the vehicle's underbody longitudinal beam 200. Therefore, the torque on the mounting structure 6 is smaller, resulting in higher installation reliability for battery 1.

[0210] In the above embodiments, the mounting structure 6 is not limited in its placement on the battery 1. It can be an integral part of the battery 1's housing 5, or it can be a separate part of the battery 1's housing 5 and directly or indirectly mounted to the battery 1's housing 5. In the above embodiments, since the mounting structure 6 detachably mounts the battery 1 to the vehicle's underbody longitudinal beam 200, the battery 1 is detachable from the vehicle 1000, thereby meeting the needs for battery 1 replacement, charging, and maintenance.

[0211] It should be noted that the connection method between the mounting structure 6 and the longitudinal beam 200 is not limited. It can be directly connected to the part of the longitudinal beam 200 facing the mounting structure 6, or it can be indirectly connected to the connecting structure 300 on the longitudinal beam 200 facing the mounting structure 6. Furthermore, it should be noted that the connection position between the mounting structure 6 and the longitudinal beam 200 is not limited; for example, it can be connected to at least one of the top, bottom, or side of the longitudinal beam 200.

[0212] For example, in some embodiments, such as Figure 5 As shown, the longitudinal beam 200 under the vehicle has a connecting structure 300. The mounting structure 6 is detachably connected to the connecting structure 300, and at least one of the mounting structure 6 and the connecting structure 300 is a locking structure. For example, the mounting structure 6 is a locking structure; another example is that the connecting structure 300 is a locking structure; yet another example is that both the mounting structure 6 and the connecting structure 300 are locking structures.

[0213] The locking structure has a locked state and an unlocked state. In the locked state, the mounting structure 6 and the connecting structure 300 are locked and cannot be separated, and the battery 1 is securely installed. In the unlocked state, the mounting structure 6 and the connecting structure 300 are unlocked and can be separated, and the battery 1 can be removed from the vehicle 1000.

[0214] Therefore, by configuring at least one of the mounting structure 6 and the connecting structure 300 as a locking structure, it is beneficial to securely install the battery 1 and meet the requirements for battery 1 replacement. Specifically, the type of locking structure is not limited, and may include screws, padlocks, etc.

[0215] In some embodiments, the unlocking position of the locking structure is located on the longitudinal outer side of the battery 1. For example, the unlocking position is located in front of or behind the battery 1, such as between two adjacent batteries 1 in the longitudinal direction. Thus, since the unlocking position of the locking structure is located on the longitudinal outer side of the battery 1, the unlocking position is not obstructed by the battery 1, thereby making it convenient to unlock the locking structure and lock it for observation.

[0216] Furthermore, there is no need to drill a vertical hole from the bottom of battery 1 to allow the unlocking component to extend vertically into the hole and engage the locking structure for unlocking. This avoids occupying space inside battery 1 due to drilling, thereby increasing the energy density of battery 1. It also avoids the sealing difficulties caused by drilling, which is beneficial for the processing and design of battery 1.

[0217] In some embodiments, such as Figures 1-4 As shown, at least two batteries 1 are arranged longitudinally along the underbody longitudinal beam 200; and / or at least two batteries 1 are placed on both sides of the underbody longitudinal beam 200. This allows for full utilization of the space near the underbody longitudinal beam 200, which is beneficial for improving the energy density of the battery pack 100. Furthermore, when each battery 1 is detachably mounted to the underbody longitudinal beam 200 via a mounting structure 6, the requirement that each mounting structure 6 is located on the side of the battery 1 facing the underbody longitudinal beam 200 is met.

[0218] For example, when there are multiple batteries 1 arranged longitudinally along the longitudinal beam 200 of the vehicle floor, if the unlocking position of the locking structure is located on the longitudinal outer side of the battery 1, the gap between two adjacent batteries 1 can be more than 30mm, which is conducive to unlocking.

[0219] For example, in some embodiments, the battery assembly 100 may include at least one of a first battery 11, a second battery 12, and a third battery 13. For example, it may include only the first battery 11, or only the second battery 12, or only the third battery 13. Alternatively, it may include both the first battery 11 and the second battery 12, or both the second battery 12 and the third battery 13, or both the first battery 11 and the third battery 13, or all of the first battery 11, the second battery 12, and the third battery 13.

[0220] For example, in some embodiments, such as Figure 12 As shown, the second battery 12 and the third battery 13 can be assembled into a shape roughly similar to the first battery 11 to form a first battery pack. That is, the fourth part 13b of the third battery 13 in the first battery pack and the second battery 12 are located on the lateral sides of the longitudinal beam 200 of the vehicle floor, respectively, and the third part 13a of the third battery 13 in the first battery pack is set to have a lateral dimension close to the lateral dimension of the longitudinal beam 200 of the vehicle floor.

[0221] For example, in some embodiments, such as Figure 13As shown, two third batteries 13 can be assembled into the shape of a first battery 11 to form a second battery pack. That is, the fourth part 13b of the two third batteries 13 in the second battery pack is located on the lateral sides of the vehicle bottom longitudinal beam 200, and the third part 13a of the two third batteries 13 in the second battery pack is arranged sequentially along the lateral side and the sum of the lateral dimensions is close to the lateral dimension of the vehicle bottom longitudinal beam 200.

[0222] Furthermore, at least two of the first battery 11, at least one first battery pack, and at least one second battery pack can be arranged longitudinally along the longitudinal beam 200 of the vehicle floor, thereby improving space utilization and increasing the energy density of the battery pack 100.

[0223] In some embodiments, combined with Figure 6 Each battery 1 includes multiple battery cells 4. The battery cells 4 can be set individually or in groups within the battery 1. When multiple battery cells 4 are set in groups, for example, multiple battery cells 4 can form a battery unit 3. Multiple battery units 3 can be arranged side by side to form a battery layer 2. The battery 1 has one layer or multiple layers of battery layers 2 arranged vertically.

[0224] In the above embodiments, multiple battery cells 3 are arranged in a regular, horizontally aligned manner to form a battery layer 2. For example, multiple battery cells 3 can be arranged sequentially in the horizontal direction, or sequentially in the vertical direction, or arranged in multiple rows and columns in both the horizontal and vertical directions. Furthermore, the multiple battery cells 3 can be connected in series, in parallel, or in a mixed configuration, etc.

[0225] Optionally, the multiple battery cells 3 in each battery layer 2 are arranged in the same direction. For example, the multiple battery cells 3 in each battery layer 2 are arranged sequentially in the horizontal direction. Or, for another example, the multiple battery cells 3 in each battery layer 2 are arranged sequentially in the vertical direction.

[0226] Optionally, the arrangement direction of multiple battery cells 3 in at least two battery layers 2 is perpendicular. For example, multiple battery cells 3 in at least one battery layer 2 are arranged sequentially in the horizontal direction, and multiple battery cells 3 in at least one battery layer 2 are arranged sequentially in the vertical direction.

[0227] Therefore, by grouping the battery cells 4 together, the assembly efficiency of the battery 1 is improved, and the current conduction is simplified. Furthermore, since the battery 1 has one or more vertically arranged battery layers 2, the total height of the battery cells 4 contained in the battery 1 can be easily and effectively ensured to meet the requirements by controlling parameters such as the number of layers or layer height, or by combining battery layers 2 with different heights. This helps to make full use of space and improve the energy density of the battery 1.

[0228] Of course, this application is not limited to this. If multiple battery cells 4 are not arranged in groups, the number of fixing plates used for grouping can be reduced, thereby saving space and increasing the energy density of battery 1.

[0229] In some embodiments, combined with Figure 6 and Figure 10 Each battery 1 includes a temperature regulating plate 8. For example, the temperature regulating plate 8 may include at least one of a first regulating plate 81, a second regulating plate 82, a third regulating plate 83, a fourth regulating plate 84, and a fifth regulating plate 85. The first regulating plate 81 is disposed between two vertically adjacent battery layers 2, the second regulating plate 82 is disposed at the bottom of the bottom battery layer 2, the third regulating plate 83 is disposed at the top of the top battery layer 2, the fourth regulating plate 84 is disposed between two adjacent battery cells 3 in the same battery layer 2, and the fifth regulating plate 85 is disposed between two adjacent battery cells 4 in the same battery cell 3. Thus, by arranging the temperature regulating plate 8 in at least one form, the temperature of the battery cells 4 can be regulated, allowing the battery 1 to operate at a suitable temperature, improving the reliability and lifespan of the battery 1, and increasing the energy efficiency of the battery 1.

[0230] In some embodiments, combined with Figure 6 and Figure 10 The temperature regulating plate 8 in the first battery 11 may include a first common horizontal plate 861, a portion of which is located within a first portion 11a, and the remaining portion of which is located within a second portion 11b. This simplifies the design and assembly of the temperature regulating plate 8.

[0231] Furthermore, when a liquid path is provided within the temperature regulating plate 8, the temperature of the battery 1 can be adjusted by controlling the temperature of the liquid flowing within the liquid path. Since a portion of the first common horizontal plate 861 is located within the second part 11b, and the remaining portion of the first common horizontal plate 861 is located within the first part 11a, the design of the liquid path and the connection design for liquid inlet and outlet can be simplified. For example, the liquid inlet connector 742 provided on the battery 1 can be in liquid communication with the temperature regulating plate 8.

[0232] In some embodiments, combined with Figure 13 The temperature regulating plate 8 in the third battery 13 may include a second common horizontal plate 862, a portion of which is located within the third portion 13a, and the remaining portion of which is located within the fourth portion 13b. This simplifies the design and assembly of the temperature regulating plate 8.

[0233] Furthermore, when a liquid path is provided within the temperature regulating plate 8, the temperature of the battery 1 can be adjusted by controlling the temperature of the liquid flowing within the liquid path. Since a portion of the second common horizontal plate 862 is located within the third part 13a, and the remaining portion of the second common horizontal plate 862 is located within the fourth part 13b, the design of the liquid path and the connection design for the inlet and outlet liquid can be simplified. For example, the liquid inlet connector 742 provided on the battery 1 can be in liquid communication with the temperature regulating plate 8.

[0234] In some embodiments, the casing 5 of the battery 1 can be made of a high-strength material to ensure the reliable connection between the mounting structure 6 on the casing 5 and the longitudinal beam 200 under the vehicle. For example, high-strength steel roll-formed profiles, etc.

[0235] Hereinafter, with reference to the accompanying drawings, a vehicle 1000 according to an embodiment of the present application will be described.

[0236] Vehicle 1000 may include battery 1 according to any embodiment of this application.

[0237] By setting multiple batteries 1 at the bottom of the vehicle 1000 and configuring these batteries 1 to be individually replaceable relative to the vehicle 1000, the appropriate number of batteries 1 can be matched according to different application scenarios, different mileage, and different vehicle 1000 configurations, thereby improving the flexibility of battery swapping and making it compatible with different vehicle models and application scenarios, such as mainline, short-distance, and light-duty scenarios.

[0238] Furthermore, it eliminates the need to install all batteries 1 into the vehicle 1000, reducing the load on the vehicle 1000. Also, since each battery 1 can be replaced individually, batteries 1 that have been deeply discharged can be removed, avoiding the waste of battery power caused by replacing batteries 1 before they are fully discharged.

[0239] Furthermore, compared to a single large battery pack solution, when multiple relatively small batteries 1 are used in combination, the battery swapping efficiency is higher because it is not necessary to replace all batteries 1 each time. This can significantly improve the throughput of a battery swapping station 2000 in the same space.

[0240] Hereinafter, with reference to the accompanying drawings, a battery swapping station 2000 according to an embodiment of this application will be described.

[0241] The battery swapping station 2000 is used to replace the battery 1 of the vehicle 1000 according to any embodiment of this application.

[0242] In some embodiments, such as Figure 14As shown, the battery swapping station 2000 includes a battery swapping area 600, and the vehicle 1000 is adapted to swap the battery 1 in the battery swapping area 600. The battery swapping area 600 includes a first area 601 and a second area 602. The first area 601 is adapted to be located directly below the battery 1, and the second area 602 is used to support the front wheel 400 and the rear wheel 500 adjacent to the battery 1. The ground of the first area 601 and the second area 602 are flush.

[0243] Since the bottom surface of the battery 1 can be raised above the ground according to some embodiments of this application, the battery swapping station 2000 can eliminate the need for lifting the entire vehicle or digging trenches, thereby simplifying the site layout of the battery swapping station 2000 and improving space utilization.

[0244] Optionally, the ground of the battery swapping area 600 is entirely flat, which reduces the construction difficulty of the battery swapping station 2000 and helps to reduce the construction cost of the battery swapping station 2000.

[0245] In some embodiments, such as Figure 1 and Figure 2 As shown, the vertical distance between the bottom surface of the wheel of vehicle 1000 and the bottom surface of battery 1 is H1, the vertical distance between the bottom surface of the wheel of vehicle 1000 and the bottom surface of the longitudinal beam 200 is H2, the height of the battery swapping transport vehicle is H7, and the vertical height of battery 1 is L3, where H2 ≥ L3 + H7, and H1 > H7. Therefore, the battery swapping station 2000 can achieve battery swapping without digging a trench or raising vehicle 1000, while ensuring that the vertical height of battery 1 makes full use of space and maintains a safe distance from the ground. For example, when vehicle 1000 is a heavy truck, H2 = 700mm, L3 = 600mm, H4 = 100mm, and H1 ≥ 300mm. Of course, the type of vehicle 1000 is not limited to this; it can also be other types of vehicles that require electricity, which will not be elaborated here.

[0246] The following describes a vehicle 1000 and its battery swapping method according to a specific embodiment of this application.

[0247] See attached document Figures 1-13 Multiple batteries 1 are installed on the longitudinal beam 200 of the vehicle 1000, arranged along the length of the longitudinal beam 200. Each battery 1 can be detached from the longitudinal beam 200. Each battery is a first battery 11. The top of the battery 1 has a recess 10 to accommodate the longitudinal beam 200, so that the battery 1 can utilize the space on both sides and below the longitudinal beam 200 to ensure the energy density of the battery 1 and increase the ground clearance of the battery 1.

[0248] The battery 1 is installed in two battery layers 2 on both sides of the longitudinal beam 200 under the vehicle. Each battery layer 2 includes multiple battery units 3 arranged side by side, and each battery unit 3 includes multiple battery cells 4 arranged side by side, thus making full and effective use of the space on both sides of the longitudinal beam 200. A battery layer 2 is also installed below the longitudinal beam 200 under the battery 1. This battery layer 2 includes multiple battery units 3 arranged side by side, and each battery unit 3 includes multiple battery cells 4 arranged side by side. This fully utilizes the space below the longitudinal beam 200 while ensuring sufficient space between the bottom of the battery 1 and the ground. This prevents the bottom of the battery 1 from being scratched by the ground, effectively protecting the battery 1. Furthermore, it provides sufficient space for battery swapping, allowing the battery swapping station 2000 to be used without digging a trench or raising the vehicle 1000, simplifying the site layout of the battery swapping station 2000 and improving space utilization.

[0249] Specifically, mounting structures 6 are respectively provided on the two transverse sidewalls 10b of the recess 10. Each mounting structure 6 includes 2-3 sub-mounting parts 61 arranged longitudinally at intervals. Connecting structures 300 are provided on the transverse sidewalls of the vehicle underbody longitudinal beam 200 corresponding to the positions of each mounting structure 6. One of the sub-mounting parts 61 and the connecting structure 300 is a mounting pin, and the other is a battery swapping lock. When swapping the battery 1, the battery 1 is pushed upward, and the mounting pin engages with the battery swapping lock, thus completing the installation of the battery 1 onto the vehicle underbody longitudinal beam 200. Since multiple batteries 1 are installed on the vehicle underbody longitudinal beam 200, and the size of each battery 1 is relatively small, not only can the installation reliability of each battery 1 be improved, but the battery swapping design of each battery 1 is also facilitated.

[0250] In related technologies, when installing batteries into vehicles, the battery pack is first pre-installed on the battery swapping frame, and then the entire battery swapping frame is fixed to the vehicle chassis. This installation method has the following main problems.

[0251] First, since the battery pack is pre-installed on the battery swapping frame, the entire battery swapping unit is very large and heavy. The battery swapping station that is paired with it needs to dig a trench or lift the vehicle. In addition, the battery swapping transport vehicle that is designed to be paired with it needs to be larger, more load-bearing, more complex in design, and more expensive.

[0252] In this embodiment, the battery 1 can be mounted on the longitudinal beam 200 under the vehicle via its own mounting structure 6, thus eliminating the need for a battery swapping frame, reducing battery swapping costs, and improving battery swapping efficiency. Furthermore, the battery 1's ground clearance can be increased, eliminating the need to lift the entire vehicle or dig trenches for the accompanying battery swapping transport vehicle, reducing the site configuration difficulty of the battery swapping station 2000. Moreover, the design complexity and cost of the accompanying battery swapping transport vehicle can also be reduced.

[0253] Secondly, the battery swapping lock attachment points on the battery swapping frame are all located on the outer peripheral wall of the frame. The span between multiple battery swapping lock attachment points is relatively large, resulting in significant deviations between them. This increases the locking time during battery swapping and reduces the success rate of battery swapping, thus limiting the efficiency of battery swapping. Furthermore, the battery swapping lock attachment points are subjected to a large torque, requiring extremely high strength from the quick-change lock, which leads to lower reliability of battery installation.

[0254] In this embodiment, the battery 1 can be mounted on the longitudinal beam 200 of the vehicle floor via its own mounting structure 6, with the mounting structure 6 facing the longitudinal beam 200. This reduces the deviation between the locking points, shortening the locking time during battery swapping and increasing the success rate of battery swapping, thus improving battery swapping efficiency. Furthermore, the mounting structure 6 bears a smaller torque, resulting in high installation reliability of the battery 1 and lower strength requirements for the mounting pin on the battery swapping lock.

[0255] Third, because the battery pack is integrated into a single unit, a larger battery swapping frame is needed to withstand the stress. As a result, the battery swapping frame occupies more space, which limits the capacity of the battery pack. This restricts the distance between battery swapping stations, increases the number of battery swapping stations, and increases costs.

[0256] In this embodiment of the application, the battery 1 can be installed on the longitudinal beam 200 of the vehicle bottom through its own mounting structure 6. Since the battery swapping frame is eliminated and multiple batteries 1 are set, the power capacity can be larger, the distance between the battery swapping stations 2000 is shortened, the number of battery swapping stations 2000 is reduced, and the cost is reduced.

[0257] Fourth, each vehicle model can only be equipped with one type of battery pack, and different application scenarios can only be matched with a single battery pack, resulting in low flexibility and poor compatibility in battery swapping.

[0258] In this embodiment of the application, the battery 1 is configured as multiple batteries, each of which is individually and detachably installed on the longitudinal beam 200 under the vehicle. This significantly improves compatibility and battery swapping flexibility. It also increases the adaptability and throughput of the battery swapping station 2000, reduces the number of battery swapping stations 2000, reduces the distance between battery swapping stations 2000, and lowers investment costs.

[0259] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0260] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery assembly, characterized in that, The device includes multiple batteries, each of which has a mounting structure. The batteries are adapted to be disposed at the bottom of the vehicle and detachably connected to the vehicle via the mounting structure, so that the multiple batteries can be individually and detachably installed to the vehicle. At least one of the plurality of batteries is a first battery, the first battery comprising two first portions, the two first portions being adapted to be disposed on the lateral sides of the longitudinal beam of the vehicle floor, the top surface of the first portion being higher than the bottom surface of the longitudinal beam of the vehicle floor, and the first portion comprising at least one first battery cell. The first battery also includes a second portion that connects the two first portions, and the top surface of the second portion is lower than the top surface of the first portion to form a recess between the first portion and the two second portions suitable for accommodating the vehicle underbody longitudinal beam; The mounting structure is provided on the two transverse sidewalls of the recess, and each mounting structure includes multiple sub-mounting parts arranged at intervals along the longitudinal direction. The transverse two sides of the vehicle bottom longitudinal beam are provided with connecting structures corresponding to the positions of each mounting structure. One of the sub-mounting parts and the connecting structure is a mounting pin and the other is a battery lock.

2. The battery assembly according to claim 1, characterized in that, The top surface of the first battery cell contained in the first portion is adapted to be above the height center of the longitudinal beam of the vehicle floor; and / or, the top wall of the first portion is adapted to be below the top surface of the longitudinal beam of the vehicle floor.

3. The battery assembly according to claim 1, characterized in that, The mounting structure includes a first mounting structure disposed on the first part, the first mounting structure being located between the first part and the outer side of the longitudinal beam of the vehicle floor.

4. The battery assembly according to claim 3, characterized in that, The first mounting structure includes a plurality of sub-mounting parts arranged at intervals along the longitudinal direction.

5. The battery assembly according to claim 1, characterized in that, The vertical dimension L4 of the first part is smaller than the horizontal dimension L5 of the first battery.

6. The battery assembly according to claim 1, characterized in that, The two first parts are symmetrically arranged.

7. The battery assembly according to claim 1, characterized in that, The first part includes one or multiple first battery layers arranged vertically, the first battery layer including a plurality of first battery cells arranged side by side, and the first battery cell including at least one first battery cell.

8. The battery assembly according to claim 1, characterized in that, The top surface of the second part is adapted to be lower than the longitudinal beam of the vehicle floor, and the top surface of the second part has a first docking structure adapted to extend between the two longitudinal beams of the longitudinal beam of the vehicle floor and to dock with the vehicle to achieve current conduction and / or liquid conduction.

9. The battery assembly according to claim 8, characterized in that, The first docking structure has its docking surface facing upwards and docking vertically, or the docking surface of the first docking structure faces horizontally and docking horizontally.

10. The battery assembly according to claim 8, characterized in that, The first docking structure is located at the longitudinal center of the first battery.

11. The battery assembly according to claim 1, characterized in that, The second part also includes at least one of the first battery cells.

12. The battery assembly according to claim 11, characterized in that, The second part includes one or multiple first battery layers arranged vertically, the first battery layer including a plurality of first battery cells arranged side by side, and the first battery cell including at least one first battery cell.

13. The battery assembly according to claim 12, characterized in that, The first part also includes one or more layers of the first battery layer arranged vertically, and the total height H4 of the first battery cells contained in the first part is greater than the total height H3 of the first battery cells contained in the second part.

14. The battery assembly according to claim 1, characterized in that, At least two of the plurality of batteries are the first batteries, and all the first batteries are adapted to be arranged sequentially along the longitudinal direction of the vehicle.

15. The battery assembly according to claim 14, characterized in that, A clearance gap is provided between two adjacent first batteries.

16. The battery assembly according to claim 14, characterized in that, Each of the first batteries has the same specifications, or at least two of the first batteries have different specifications.

17. The battery assembly according to claim 1, characterized in that, At least one of the plurality of batteries is a second battery, the second battery being adapted to be located on one transverse side of the longitudinal beam of the vehicle floor, and the top surface of the second battery being higher than the bottom surface of the longitudinal beam of the vehicle floor, the second battery comprising at least one second battery cell.

18. The battery assembly according to claim 17, characterized in that, The mounting structure includes a second mounting structure disposed on the second battery, the second mounting structure being located between the second battery and the outer side of the vehicle underbody longitudinal beam.

19. The battery assembly according to claim 17, characterized in that, The second battery includes one layer or multiple layers of second batteries arranged vertically. The second battery layer includes a plurality of second battery cells arranged side by side. The second battery cell includes at least one second battery cell.

20. The battery assembly according to claim 1, characterized in that, At least one of the plurality of batteries is a third battery, the third battery comprising a third part and a fourth part, both the third part and the fourth part comprising at least one third battery cell, the fourth part being a single cell disposed on one lateral side of the third part, the top surface of the fourth part being higher than the top surface of the third part, the top surface of the third part being adapted to be lower than the bottom surface of the vehicle undercarriage longitudinal beam, and the third part being adapted to be located below the vehicle undercarriage longitudinal beam, the fourth part being adapted to be located on one lateral side of the vehicle undercarriage longitudinal beam, and the top surface of the fourth part being adapted to be higher than the bottom surface of the vehicle undercarriage longitudinal beam.

21. The battery assembly according to claim 20, characterized in that, The mounting structure includes a third mounting structure disposed on the third part and / or the fourth part, the third mounting structure being located between the third battery and the longitudinal beam of the vehicle floor.

22. The battery assembly according to claim 20, characterized in that, The top surface of the third part has a second docking structure, which is adapted to extend between the two longitudinal beams of the vehicle underbody longitudinal beam and is used to dock with the vehicle to achieve current conduction and / or liquid conduction.

23. The battery assembly according to claim 20, characterized in that, Both the third part and the fourth part include one layer or multiple layers of third battery layers arranged vertically. The third battery layer includes multiple third battery units arranged side by side. The third battery unit includes at least one third battery cell. The total height H6 of the third battery cells contained in the fourth part is greater than the total height H5 of the third battery cells contained in the third part.

24. The battery assembly according to any one of claims 1-23, characterized in that, At least two of the batteries are different in at least one of the following: capacity, shape, and size.

25. The battery assembly according to claim 1, characterized in that, Each of the batteries has the same specifications.

26. The battery assembly according to claim 1, characterized in that, Multiple batteries are connected in series and / or in parallel.

27. The battery assembly according to claim 1, characterized in that, Each of the batteries has a power connector adapted to conduct current to the vehicle or to an adjacent battery.

28. The battery assembly according to claim 27, characterized in that, The power connector is located on the top surface of the battery, with the mating surface of the power connector facing upwards.

29. The battery assembly according to claim 1, characterized in that, Each of the batteries has a fluid inlet connector adapted to communicate with the vehicle fluid or with the fluid of an adjacent battery.

30. The battery assembly according to claim 29, characterized in that, The liquid inlet connector is located on the top surface of the battery, with the mating surface of the liquid inlet connector facing upwards.

31. The battery assembly according to any one of claims 1-23, characterized in that, The mounting structure is adapted to be detachably mounted on the longitudinal beam of the vehicle floor, and the mounting structure is located on the side of the battery facing the longitudinal beam of the vehicle floor.

32. The battery assembly according to any one of claims 2-23, characterized in that, At least two of the batteries are arranged longitudinally along the longitudinal beam of the vehicle floor; and / or at least two of the batteries are placed on the transverse sides of the longitudinal beam of the vehicle floor.

33. A vehicle, characterized in that, Includes the battery assembly according to any one of claims 1-23.

34. The vehicle according to claim 33, characterized in that, Multiple batteries are installed at the bottom of the vehicle, and each battery can be individually replaced relative to the vehicle.

35. The vehicle according to claim 33, characterized in that, The vehicle includes a longitudinal beam under the vehicle floor, and the batteries are multiple and arranged longitudinally along the longitudinal beam under the vehicle floor. The unlocking position of the battery is located on the longitudinal outer side of the battery, and the gap between two adjacent batteries is more than 30mm.

36. The vehicle according to claim 33, characterized in that, The vehicle in question is a large heavy truck, a tractor unit, or a small truck.

37. The vehicle according to claim 33, characterized in that, The vehicle is a heavy-duty truck. The vertical distance between the bottom surface of the vehicle's wheels and the bottom surface of the battery is H1. The vertical distance between the bottom surface of the vehicle's wheels and the bottom surface of the vehicle's undercarriage longitudinal beam is H2. The vertical height of the battery is L3. H1 ≥ 300mm, H2 = 700mm, and L3 = 600mm.

38. A battery swapping station, characterized in that, Used for replacing the battery in a vehicle according to any one of claims 33-37.

39. The battery swapping station according to claim 38, characterized in that, The battery swapping station includes a battery swapping area, and the vehicle is adapted to swap the battery in the battery swapping area. The battery swapping area includes a first area and a second area. The first area is adapted to be located directly below the battery, and the second area is used to support the front wheel and rear wheel adjacent to the battery. The first area and the second area are flush with the ground.

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