Vehicle

Abstract

The utility model discloses a vehicle, and belongs to the technical field of vehicles. The vehicle comprises a vehicle body, a battery rack and a plurality of battery devices, and the battery rack is arranged on the vehicle body. The battery device comprises a battery monomer and a box body, the box body is provided with a containing cavity for containing the battery monomer, a hanging part is arranged at the bottom of the box body, in the same projection plane perpendicular to the gravity direction, the orthographic projection of the hanging part falls into the orthographic projection of the containing cavity, and the hanging part is used for hanging the battery device on the battery rack. Wherein the multiple battery devices are arranged at intervals in the gravity direction, the distance H1 between every two adjacent battery devices is larger than or equal to 10 mm and smaller than or equal to 120 mm. The battery device mounted on the vehicle can have higher energy density.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a vehicle. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important part of the sustainable development of the automotive industry.

[0003] Improving the energy density of battery devices mounted on vehicles is a pressing issue in vehicle technology. Utility Model Content

[0004] In view of the above problems, this application provides a vehicle that can improve the energy density of the battery device mounted on the vehicle.

[0005] In a first aspect, this application provides a vehicle comprising a vehicle body, a battery rack, and multiple battery devices, the battery rack being disposed on the vehicle body. Each battery device includes individual battery cells and a housing. The housing has a cavity for accommodating the individual battery cells, and a mounting portion is provided at the bottom of the housing. In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting portion falls within the orthographic projection of the cavity, and the mounting portion is used to mount the battery devices onto the battery rack. The multiple battery devices are spaced apart along the direction of gravity, and the distance between two adjacent battery devices is H1, satisfying: 10mm ≤ H1 ≤ 120mm.

[0006] In the technical solution of this application embodiment, since the orthographic projection of the mounting part falls within the orthographic projection of the receiving cavity in the same projection plane perpendicular to the direction of gravity, the mounting part will not occupy the space between the outer side of the housing and the battery rack, thereby improving the energy density of the battery device mounted on the vehicle. Furthermore, when H1 ≥ 10mm, the distance between two adjacent battery devices is relatively large, reducing the risk of damage to the housing of adjacent battery devices due to deformation of the battery device's housing, resulting in higher reliability of the battery device mounted on the vehicle. When H1 ≤ 120mm, it means that the distance between two adjacent battery devices is relatively small, and the battery device occupies a larger proportion of the space in the battery rack, thus enabling the battery device mounted on the vehicle to have a higher energy density. During the mounting operation, the upper battery device can be fixed to the battery rack first in the direction of gravity, and then the lower battery device can be installed, so the mounting process of the upper battery device will not be interfered with by the lower battery device. In this way, after all the battery devices are mounted on the battery rack, H1 can be kept within a range of less than 120mm, thereby maintaining a high energy density for the battery devices mounted on the vehicle; when 10mm≤H1≤120mm, the battery devices mounted on the vehicle can balance high reliability and high energy density.

[0007] In one or more embodiments of the first aspect, 10mm ≤ H1 ≤ 50mm.

[0008] In the above scheme, when H1≥10mm, the risk of damage to the battery pack of adjacent battery packs due to deformation of the battery pack can be further reduced, thus further improving the reliability of the battery pack mounted on the vehicle; when H1≤50mm, the space ratio occupied by the battery pack in the battery rack can be further increased, thus further increasing the energy density of the battery pack mounted on the vehicle; therefore, when 10mm≤H1≤50mm, the reliability of the battery pack mounted on the vehicle can be further improved, while the energy density of the battery pack mounted on the vehicle can also be further improved.

[0009] In one or more embodiments of the first aspect, the housing includes a first housing and a second housing. The first housing includes a first sealing surface, and the second housing includes a first surface and a second sealing surface. The first surface is used to support a single battery cell, and the second sealing surface is located on one side of the second housing in a second direction, which is perpendicular to the direction of gravity. The first sealing surface and the second sealing surface cooperate to form a first sealing interface for sealing the receiving cavity, and the first sealing interface intersects with the first surface.

[0010] In the above solution, by setting the first sealing interface to intersect with the first surface, i.e., the first sealing interface is not parallel to the first surface, the projected area of ​​the first seal on the plane containing the first surface can be reduced. This reduces the space occupied by the first sealing interface in the direction parallel to the first surface, thereby improving the space utilization rate of the battery device in this direction. This allows for the accommodation of more battery cells or, while accommodating the same number of battery cells, a smaller battery device volume, thus increasing the volumetric energy density of the battery. In other words, it enables the battery device to fully utilize the space of the battery rack, thereby increasing the energy density of the battery device mounted on the vehicle.

[0011] In one or more embodiments of the first aspect, the first sealing interface is perpendicular to the first surface.

[0012] The above solution can further reduce the projected area of ​​the first seal on the plane where the first surface is located, further reduce the space occupied by the first sealing interface in the direction parallel to the first surface, and further improve the energy density of the battery device.

[0013] In one or more embodiments of the first aspect, the first sealing interface is parallel to the direction of gravity.

[0014] In the above solution, the first and second housings can be sealed together without the need for a wall forming a sealing interface in a plane perpendicular to the direction of gravity. This improves the space utilization of the battery device in a plane perpendicular to the direction of gravity, allowing it to accommodate more battery cells or reduce the volume of the battery device while accommodating the same number of battery cells.

[0015] In one or more embodiments of the first aspect, the first housing includes two first sidewalls disposed opposite to each other along a second direction. The battery compartment has two first compartment walls disposed opposite to each other along the second direction. Along the second direction, the minimum distance between the first sidewalls and the first compartment walls is H2, satisfying: 10mm ≤ H2 ≤ 50mm.

[0016] In the above scheme, when H2≥10mm, there is a certain space between the first side wall and the first compartment wall, which can reduce the risk of damage to the first box caused by friction or collision between the first box and the battery rack, so as to make the battery device have high reliability; when H2≤50mm, the battery device occupies a higher proportion of the battery compartment space, and the energy density of the battery device mounted on the vehicle is higher; therefore, when 10mm≤H2≤50mm, the battery device mounted on the vehicle can balance high reliability and high energy density.

[0017] In one or more embodiments of the first aspect, a first sealing element is disposed between the first sealing surface and the second sealing surface, the first sealing element being located on the side of the first sealing surface and the second sealing surface that is far from the receiving cavity and closer to the receiving cavity.

[0018] In the above solution, by setting a first sealing element between the first sealing surface and the second sealing surface, the sealing performance between the first sealing surface and the second sealing surface can be effectively improved, reducing the risk of external substances entering the cavity and damaging the battery cells, thereby improving the reliability of the battery device.

[0019] In one or more embodiments of the first aspect, along the width direction of the first seal, one end of the first seal is close to the receiving cavity, the other end of the first seal is close to the outside of the battery, and the width direction of the first seal intersects with the first surface.

[0020] In the above scheme, by setting the width direction of the first seal to intersect with the first surface, the width direction of the first seal can be made non-parallel to the first surface. Under the condition that the first seal plays a good sealing role, the projected area of ​​the first seal on the first surface can be reduced, and the space occupied by the first seal in the direction parallel to the first surface can be reduced, thereby improving the space utilization rate of the battery in the direction parallel to the first surface and improving the volumetric energy density of the battery.

[0021] In one or more embodiments of the first aspect, the second housing includes a second end wall and a second side wall, a first surface is located on the second end wall, at least a portion of the second sealing surface is disposed on the second side wall, the second side wall is connected to the end of the second end wall in the second direction, and in the same projection plane perpendicular to the second direction, at least a portion of the orthographic projection of the second side wall is located on the side of the orthographic projection of the first surface closer to the battery cell.

[0022] In the above solution, the second housing includes a second end wall and a second side wall. The second end wall has a first surface to support the battery. The second sealing surface can be at least partially located on the second side wall, so that the thickness of the second end wall does not need to be set too large to meet the width requirements of the first sealing element. While meeting the requirements of the first sealing element, the second housing can be made lighter or the cost can be reduced.

[0023] In one or more embodiments of the first aspect, the second housing includes a second end wall, a first surface located on the second end wall, and a second sealing surface being a side wall surface of the second end wall perpendicular to the second direction.

[0024] In the above solution, on the one hand, the second end wall of the second housing can serve as a component for supporting the battery cell. On the other hand, the second end wall of the second housing also has a second sealing surface to connect with the first sealing surface of the first housing. Thus, while setting the second housing to a simpler structure, the sealing requirements of the first sealing surface and the second sealing surface are met, which can reduce the processing cost of the second housing.

[0025] In one or more embodiments of the first aspect, the first housing includes a first end wall and a first side wall connected to each other, the first end wall includes a first end wall surface disposed opposite to the first surface, at least a portion of the first sealing surface is disposed on the first side wall, and at least a portion of the first side wall is located on the side of the first end wall surface close to the first surface.

[0026] In the above scheme, the first housing includes a first end wall and a first side wall that are connected to each other. By setting at least a portion of the first side wall to be located on the side of the first end wall that is close to the first surface, on the one hand, the first housing and the second housing can be enclosed to form a receiving cavity for accommodating the battery cell. On the other hand, the first sealing surface is formed on the first side wall, which can make the area of ​​the first sealing surface larger, so as to form a good connection relationship and good sealing performance with the second sealing surface, thereby making the battery device have high reliability.

[0027] In one or more embodiments of the first aspect, at least a portion of the first sidewall is located on the side of the first surface away from the battery cell.

[0028] In the above scheme, at least a portion of the first sidewall is located on the side of the first surface away from the battery cell. This can also be understood as at least a portion of the first sealing surface being located on the side of the first surface away from the battery cell. On the one hand, this allows the area of ​​the first sealing surface to be as large as possible, so as to form a better connection stability and sealing performance with the second sealing surface. On the other hand, when the first sealing surface and the second sealing surface are connected to each other by other connectors, since the first surface is the surface of the second end wall, the second end wall can provide a larger connection dimension for the connector along the second direction, so as to improve the connection strength between the first sealing surface and the second sealing surface, reduce the risk of the first sealing surface and the second sealing surface separating from each other, and make the battery device have higher reliability.

[0029] In one or more embodiments of the first aspect, the second housing further includes a third sidewall disposed at the end of the second endwall in the first direction, the third sidewall extending toward and connecting to the first housing, and the first direction, the second direction and the gravity direction being perpendicular to each other.

[0030] In the above scheme, by providing a third sidewall at the end of the second endwall in the first direction, the second endwall can be connected to the first housing in the first direction through the third sidewall, thereby improving the connection stability of the first housing and the second housing, and thus improving the reliability of the battery device.

[0031] In one or more embodiments of the first aspect, the third sidewall includes a first flat surface opposite to the first surface and a second flat surface intersecting the second direction, the first flat surface being used for a sealing connection with the first end wall and the second flat surface being used for a sealing connection with the first sidewall.

[0032] In the above scheme, the third sidewall is connected to the first housing via the first and second straight surfaces, which effectively improves the connection stability and sealing of the first and second housings, resulting in higher reliability of the battery device. The second straight surface intersects with the second direction and is used for a sealed connection with the first sidewall, thus effectively improving the space utilization of the battery device in the second direction and consequently increasing the volumetric energy density of the battery.

[0033] In one or more embodiments of the first aspect, the battery further includes a second seal disposed between the third sidewall and the first housing.

[0034] In the above solution, by setting a second sealing element between the third sidewall and the first housing, the sealing performance between the third sidewall and the first housing can be effectively improved, thus giving the battery device higher reliability.

[0035] In one or more embodiments of the first aspect, the first flat surface and the second flat surface are connected by a transition surface, the transition surface including a slope and / or an arc surface, and a mating surface is formed at the connection between the first end wall and the first side wall, the mating surface being provided corresponding to the transition surface.

[0036] In the above scheme, by setting a transition surface, the transition between the first flat surface and the second flat surface can be smooth. On the one hand, this facilitates the second seal to fit tightly against the surface where the third side wall and the first housing are connected. On the other hand, it reduces the risk of the second seal being damaged due to interference from the edges between the first flat surface and the second flat surface, thus making the battery more reliable.

[0037] In one or more embodiments of the first aspect, the second seal includes a first sub-seal, a second sub-seal, and a third sub-seal. The first sub-seal is disposed between a first flat surface and a first end wall, the second sub-seal is disposed between a second flat surface and a first side wall, and the third sub-seal is disposed between a transition surface and a mating surface.

[0038] In the above solution, by setting the second seal as a first sub-seal, a second sub-seal, and a third sub-seal, and by setting the first sub-seal, the second sub-seal, and the third sub-seal respectively between the first flat surface and the first end wall, between the second flat surface and the first side wall, and between the transition surface and the mating surface, the second seal can be tightly attached to the surface where the third side wall connects with the first housing, thereby improving the sealing between the first housing and the second housing and thus making the battery device have higher reliability.

[0039] In one or more embodiments of the first aspect, the battery further includes a first fastener that passes through the first sealing interface along a second direction and is locked into the interior of the second end wall.

[0040] In the above solution, by setting the first fastener to pass through the first sealing interface and lock it into the interior of the second end wall, the connection stability of the first housing and the second housing can be effectively improved, thereby improving the structural stability of the battery device and making the battery device have high reliability.

[0041] In one or more embodiments of the first aspect, the second housing further includes a third sidewall disposed at the end of the second endwall in the first direction, and the battery further includes a second fastener for connecting the third sidewall and the first housing, the second fastener being locked into the interior of the third sidewall, the first direction, the second direction and the gravity direction being perpendicular to each other.

[0042] In the above solution, by providing a third sidewall at the end of the second endwall in the first direction and connecting the third sidewall and the first housing with a second fastener, a stable connection relationship can be established between the third sidewall and the first housing, thereby improving the connection stability between the first housing and the second housing and thus improving the reliability of the battery device.

[0043] In one or more embodiments of the first aspect, the orthographic projection of the second fastener and the orthographic projection of the mounting portion do not overlap in the same projection plane perpendicular to the first direction.

[0044] In the above solution, since the orthographic projection of the second fastener and the orthographic projection of the mounting part do not overlap in the same projection plane perpendicular to the first direction, the risk of collision between the second fastener and the mounting part is low during the process of the battery device being installed into the battery rack along the first direction. This reduces the risk of damage during the assembly of the battery device and the battery rack and improves the reliability of the battery device.

[0045] In one or more embodiments of the first aspect, a first sealing member is provided between the first sealing surface and the second sealing surface. Along the width direction of the first sealing member, one end of the first sealing member is close to the receiving cavity, and the other end of the first sealing member is close to the outside of the battery. The width direction of the first sealing member is parallel to the first surface.

[0046] In the above scheme, by setting the width direction of the first seal to be parallel to the first surface, for example, the width direction of the first seal to be parallel to the first direction, the thickness of the first seal can be reduced to occupy space in the second direction while the first seal plays a good sealing role, thereby improving the space utilization rate of the battery in the second direction and thus improving the volumetric energy density of the battery.

[0047] In one or more embodiments of the first aspect, the vehicle is a truck, the vehicle body includes a cab and a cargo compartment, the battery rack is disposed between the cab and the cargo compartment, and the second direction is the direction from the cab to the cargo compartment.

[0048] In the above scheme, the second direction is the direction from the cab to the cargo compartment. Therefore, after the vehicle is equipped with the battery device, the space between the cab and the cargo compartment can be used more efficiently. By setting the first sealing interface of the battery device to intersect with the first surface, the overall space occupied by the battery device along the second direction can be reduced without affecting the sealing performance of the battery device. This allows the cargo compartment to occupy more space in the second direction, thereby loading more cargo. Alternatively, the space saved along the second direction can be used to install a battery device with a higher energy density to improve the vehicle's range.

[0049] In one or more embodiments of the first aspect, the vehicle is a tractor, the vehicle body includes a cab and a towing seat, the battery rack is disposed between the cab and the towing seat, and the second direction is the direction from the cab toward the towing seat.

[0050] In the above scheme, the second direction is the direction from the cab to the towing seat. Therefore, after the vehicle is equipped with the battery device, the space between the cab and the towing seat can be used efficiently. By setting the first sealing interface of the battery device to intersect with the first surface, the overall space occupied by the battery device along the second direction can be reduced without affecting the sealing performance of the battery device. This allows the towing seat to be set closer to the cab, so that more space in the vehicle body in the second direction can be used to mount the cargo box, thereby loading more cargo; or, the space saved along the second direction can be used to install a battery device with a higher energy density to improve the vehicle's range.

[0051] In one or more embodiments of the first aspect, the battery rack includes a plurality of battery compartments arranged along the direction of gravity, with a plurality of battery devices corresponding one-to-one with the plurality of battery compartments, and each battery device being housed in its corresponding battery compartment.

[0052] In the above scheme, since multiple battery devices correspond one-to-one with multiple battery compartments, the assembly process of the battery devices is simpler and the assembly difficulty is relatively low. The risk of damage from collisions between different battery devices is also relatively low, resulting in higher reliability of the battery devices.

[0053] In one or more embodiments of the first aspect, the battery rack includes a main body and supporting legs. The main body includes multiple battery compartments. The supporting legs are disposed at the bottom of the main body and are used to suspend the main body.

[0054] In the above scheme, the support legs facilitate the mounting of the battery device in the battery compartment at the lowest point along the direction of gravity, which helps to improve the assembly efficiency of the battery device.

[0055] In one or more embodiments of the first aspect, the battery rack includes a plurality of first supports stacked along the direction of gravity, the plurality of first supports corresponding one-to-one with a plurality of battery devices, each first support having a battery compartment, each battery device being mounted on the corresponding first support and housed in the battery compartment of the first support.

[0056] In the above scheme, after the battery device is installed in the corresponding first bracket and mounted, multiple first brackets can be stacked to form a battery rack. The mounting operation of the battery device will not be interfered with by other battery devices. On the one hand, it is beneficial to increase the proportion of space occupied by the battery device in the battery compartment, thereby enabling the battery device mounted on the vehicle to have a higher energy density. On the other hand, it is beneficial to provide more operating space for the mounting operation, thereby reducing the assembly difficulty of the battery device.

[0057] In one or more embodiments of the first aspect, two adjacent first supports are detachably connected.

[0058] The above solution can further reduce the assembly difficulty of the battery rack and battery device, and at the same time, it can also reduce the maintenance difficulty of the battery device.

[0059] In one or more embodiments of the first aspect, two adjacent first supports are inserted and fitted together along the direction of gravity.

[0060] In the above scheme, the lower first bracket can serve as the assembly reference for the upper first bracket adjacent to it, which reduces the assembly difficulty of the first bracket.

[0061] In one or more embodiments of the first aspect, a plurality of limiting portions are provided at intervals on the upper edge of the first bracket, and the plurality of limiting portions surround to form an insertion port. In two adjacent first brackets, the lower end of the upper first bracket is inserted into the insertion port of the lower first bracket.

[0062] In the above scheme, the socket of the lower first bracket can be used as the assembly reference for the upper first bracket, and after the first bracket is assembled, the limiting part can limit the upper first bracket to improve the connection stability between two adjacent first brackets.

[0063] In one or more embodiments of the first aspect, the upper end of the first bracket has a first opening for the battery device to enter the battery compartment.

[0064] In the above scheme, the first opening allows the battery device to be installed into the first bracket from top to bottom. For example, the battery device can be assembled by means of hoisting, which helps to reduce the assembly difficulty of the battery device.

[0065] In one or more embodiments of the first aspect, the battery rack further includes a second support stacked above a plurality of first supports, the second support having a control compartment. The vehicle also includes a control module electrically connected to a plurality of battery devices, the control module being housed within the control compartment.

[0066] In the above scheme, since the mounting part is located at the bottom of the box and the second bracket is stacked on top of multiple first brackets, the assembly of the control module will not interfere with the mounting part, thus reducing the assembly difficulty of the control module.

[0067] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0068] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0069] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0070] Figure 2 This is a schematic diagram of the structure of a truck according to some embodiments of this application;

[0071] Figure 3 This is a schematic diagram of the structure of a tractor unit according to some embodiments of this application;

[0072] Figure 4 This is a schematic diagram of a partial structure of a vehicle according to some embodiments of this application;

[0073] Figure 5 This is a schematic diagram of a partial structure of a vehicle according to other embodiments of this application;

[0074] Figure 6 This is a schematic diagram of a portion of the vehicle structure according to other embodiments of this application, showing a first bracket;

[0075] Figure 7 These are perspective views of the batteries in some embodiments of this application;

[0076] Figure 8 This is an exploded perspective view of a partial structure of the battery in some embodiments of this application;

[0077] Figure 9 This is a simplified schematic diagram of a battery cell, a first surface, a first sealing surface, a second sealing surface, and a first sealing interface in some embodiments of this application;

[0078] Figure 10 This is a schematic diagram of a battery cell, a first surface, a first sealing surface, a second sealing surface, and a first sealing interface in other embodiments of this application;

[0079] Figure 11 This is a schematic diagram of a battery cell, a first surface, a first sealing surface, a second sealing surface, and a first sealing element in some embodiments of this application;

[0080] Figure 12 This is a perspective view of the second housing in some embodiments of this application;

[0081] Figure 13 for Figure 12 Enlarged view of point A in the middle;

[0082] Figure 14 This is a schematic diagram of the second end wall, the first seal, and the first sealing surface in some embodiments of this application;

[0083] Figure 15 This is a perspective view of the first housing in some embodiments of this application;

[0084] Figure 16 This is a perspective view of the battery in some other embodiments of this application;

[0085] Figure 17 This is a partial structural diagram of the second box in some embodiments of this application;

[0086] Figure 18 This is a partial structural diagram of the first housing in some embodiments of this application;

[0087] Figure 19 This is a partial structural schematic diagram of the second seal in some embodiments of this application;

[0088] Figure 20 This is a partial structural diagram of the first housing in some other embodiments of this application;

[0089] Figure 21 This is a partial structural diagram of the second housing in some other embodiments of this application;

[0090] Figure 22 This is a schematic diagram of the second housing in some other embodiments of this application;

[0091] Figure 23 This is a schematic diagram of the first fastener and the first surface in other embodiments of this application;

[0092] Figure 24 This is a schematic diagram of the specific structure of the battery in some other embodiments of this application;

[0093] Figure 25 This is a simplified schematic diagram of the first housing in some other embodiments of this application;

[0094] Figure 26 This is a schematic diagram of the battery pack in some embodiments of this application;

[0095] Figure 27 This is a schematic diagram of the first and second battery packs in some embodiments of this application;

[0096] Figure 28 This is a schematic diagram of the strapping and battery pack in other embodiments of this application;

[0097] Figure 29 This is a schematic diagram of the battery pack and the second sidewall in some embodiments of this application;

[0098] Figure 30 This is a flowchart illustrating the assembly method of the battery device in some embodiments of this application;

[0099] Figure 31 This is a flowchart of the assembly method of the battery device in some embodiments of this application;

[0100] Figure 32 This is a flowchart illustrating the assembly method of the battery device in some other embodiments of this application.

[0101] The reference numerals in the detailed embodiments are as follows:

[0102] 100-Battery assembly; 1-Box; 101-Battery cell; 102-Receiving cavity; 103-First sealing interface; 10-First box; 11-First sealing surface; 12-First end wall; 120-First end wall surface; 13-First side wall; 14-Fourth side wall; 15-Plug plate; 16-Extension wall plate; 17-Connecting part; 170-Mating surface; 20-Second box; 21-First surface; 22-Second sealing surface; 23-First sealing surface; 24-Second sidewall; 25-Third sidewall; 250-First straight surface; 251-Second straight surface; 252-Transition surface; 2520-Sloping surface; 2521-Arc-shaped surface; 26-Frame; 30-First seal; 40-Second seal; 41-First sub-seal; 42-Second sub-seal; 43-Third sub-seal; 50-First fastener; 51-Second fastener; 52-First connector; 60-Battery Group; 61-First battery pack; 62-Second battery pack; 63-Side battery pack; 70-Binding component; 71-First binding component; 710-First part; 72-Second binding component; 720-Second part; 73-Outer frame; 74-Separator strip; 75-Side part; 80-End plate; 90-Mounting part; 91-Crossbeam; x-First direction; y-Second direction; z-Third direction; 1000-Vehicle; 200-Controller; 30 0-Motor; 1001-Vehicle body; 1002-Cab; 1003-Carriage compartment; 1004-Battery rack; 10041-Battery compartment; 10042-Main body; 10043-Support leg; 10044-First bracket; 10045-Limiting part; 10046-Socket; 10047-First opening; 10048-Second bracket; 10049-Control compartment; 1005-Traction seat; 1006-Control module. Detailed Implementation

[0103] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0104] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0105] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0106] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0107] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0108] In this application, "multiple" means two or more (including two).

[0109] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0110] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0111] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0112] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0113] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0114] In some implementations, the electrode assembly is a stacked structure.

[0115] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0116] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0117] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0118] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0119] 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.

[0120] In related technologies, a battery cell generally includes a casing and an electrode assembly. The casing may include a housing and an end cap. The housing has an opening. After the electrode assembly is installed inside the housing, the opening of the housing can be closed by the end cap to form a sealed space inside the housing to accommodate the electrode assembly.

[0121] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0122] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0123] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0124] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0125] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0126] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0127] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0128] Some vehicles have battery racks mounted on the vehicle body, typically consisting of multiple battery compartments arranged along the direction of gravity. Electrical devices are mounted within these compartments via mounting points. After the electrical devices are installed in the battery compartments, a significant amount of space is wasted in the direction of gravity to allow for mounting operations. This results in a relatively low proportion of space occupied by the electrical devices within the battery compartments, leading to lower energy density of the mounted electrical devices and hindering the improvement of the vehicle's driving range.

[0129] In view of this, this application provides a vehicle including a vehicle body, a battery rack, and multiple battery devices, with the battery rack disposed on the vehicle body. Each battery device includes individual battery cells and a housing. The housing has a cavity for accommodating the individual battery cells, and a mounting portion is provided at the bottom of the housing. In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting portion falls within the orthographic projection of the cavity. The mounting portion is used to mount the battery devices onto the battery rack. The multiple battery devices are spaced apart along the direction of gravity, with a distance H1 between two adjacent battery devices satisfying: 10mm ≤ H1 ≤ 120mm. By placing adjacent battery devices within a reasonable range, the battery devices mounted on the vehicle can achieve both high reliability and high energy density.

[0130] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0131] For example, Figure 1This is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 may internally house a motor 300, a controller 200, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0132] To meet different power demands, the battery device 100 may include multiple battery cells 101, which can be connected in series, parallel, or a combination thereof. The battery device 100 may also be referred to as a battery pack. Optionally, multiple battery cells 101 may first be connected in series, parallel, or a combination thereof to form a battery cell assembly, and then the battery cell assemblies may be connected in series, parallel, or a combination thereof to form the battery device 100. In other words, multiple battery cells 101 can directly form the battery device 100, or they can first be assembled into battery cell assemblies, and then the battery cell assemblies can be assembled into the battery device 100.

[0133] According to some embodiments of this application, please refer to Figures 4-7 This application provides a vehicle 1000, which includes a vehicle body 1001, a battery rack 1004, and multiple battery devices 100. The battery rack 1004 is disposed on the vehicle body 1001. Each battery device 100 includes a battery cell 101 and a housing 1. The housing 1 has a receiving cavity 102 for accommodating the battery cell 101. A mounting portion 90 is provided at the bottom of the housing 1. In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting portion 90 falls within the orthographic projection of the receiving cavity 102. The mounting portion 90 is used to mount the battery device 100 to the battery rack 1004. The multiple battery devices 100 are spaced apart along the direction of gravity, and the distance between two adjacent battery devices 100 is H1, satisfying: 10mm ≤ H1 ≤ 120mm.

[0134] In some embodiments, the battery rack 1004 includes a main body 10042, which includes a plurality of battery compartments 10041. The main body 10042 is an integrated support, that is, a plurality of battery devices 100 need to be installed into the plurality of battery compartments 10041 from top to bottom along the direction of gravity.

[0135] In some embodiments, the battery rack 1004 may be formed by welding together multiple rectangular tubes to form a battery rack 1004 having multiple battery compartments 10041.

[0136] In some embodiments, the mounting portion 90 may be a threaded hole provided at the bottom of the housing 1 or a screw or bolt connected to the bottom of the housing 1. For example, the mounting portion 90 may be an M8, M10, M12, M16 threaded hole structure provided at the bottom of the housing 1.

[0137] In some embodiments, the mounting section 90 may be configured as multiple.

[0138] In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting part 90 falls into the orthographic projection of the receiving cavity 102. This means that the mounting part 90 connected to the battery rack 1004 will not occupy the space between the receiving cavity 102 and the battery rack 1004 in the plane perpendicular to the direction of gravity. In other words, apart from the necessary wall of the housing 1, the proportion of the space occupied by the receiving cavity 102 in the battery rack 1004 can be set as large as possible. This allows for the installation of a larger battery device 100 in the same battery rack 1004, accommodating more battery cells 101, and enabling the battery device 100 to have a higher energy density.

[0139] In some embodiments, the battery compartment 10041 has two second compartment walls disposed opposite each other along a third direction z, which is parallel to the direction of gravity. Along the third direction z, the end of the mounting portion 90 away from the battery device 100 does not extend beyond the second compartment wall. This design reduces the risk of damage to the battery device 100 due to contact between the mounting portion 90 and the battery device 100.

[0140] The distance between two adjacent battery devices 100 can be any value between 10mm and 120mm, such as any one of 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, or any range between two of them.

[0141] In the technical solution of this application embodiment, since the orthographic projection of the mounting part 90 falls into the orthographic projection of the receiving cavity 102 in the same projection plane perpendicular to the direction of gravity, the mounting part 90 will not occupy the space between the outer side of the housing 1 and the battery rack 1004, which can improve the energy density of the battery device 100 mounted on the vehicle 1000. In addition, when H1≥10mm, the distance between two adjacent battery devices 100 is large, and the risk of damage to the housing 1 of adjacent battery devices 100 due to deformation of the housing 1 of the battery device 100 is low, and the reliability of the battery device 100 mounted on the vehicle 1000 is high; when H1≤120mm, it means that the distance between two adjacent battery devices 100 is small, and the proportion of space occupied by the battery device 100 in the battery rack 1004 is large, thereby enabling the battery device 100 mounted on the vehicle 1000 to have a high energy density. During the mounting operation, the upper battery device 100 can be fixed to the battery rack 1004 first in the direction of gravity, and then the lower battery device 100 can be installed. In this way, the mounting process of the upper battery device 100 will not be affected by the lower battery device 100. In this way, after all the battery devices 100 are mounted on the battery rack 1004, H1 can be kept within a range of less than 120mm, thereby maintaining a high energy density of the battery devices 100 mounted on the vehicle 1000. When 10mm≤H1≤120mm, the battery devices 100 mounted on the vehicle 1000 can achieve both high reliability and high energy density.

[0142] According to some embodiments of this application, please refer to Figures 4-7 , 10mm≤H1≤50mm.

[0143] The distance between two adjacent battery devices 100 can be any value between 10mm and 50mm, such as any one of the following values ​​or a range between any two: 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm.

[0144] In the above scheme, when H1≥10mm, the risk of damage to the housing 1 of adjacent battery devices 100 due to deformation of the housing 1 of the battery device 100 can be further reduced, thereby further improving the reliability of the battery device 100 mounted on the vehicle 1000; when H1≤50mm, the space ratio occupied by the battery device 100 in the battery rack 1004 can be further increased, thereby further increasing the energy density of the battery device 100 mounted on the vehicle 1000; therefore, when 10mm≤H1≤50mm, the reliability of the battery device 100 mounted on the vehicle 1000 can be further improved, while the energy density of the battery device 100 mounted on the vehicle 1000 can also be further improved.

[0145] According to some embodiments of this application, please refer to Figures 4-11 The housing 1 includes a first housing 10 and a second housing 20. The first housing 10 includes a first sealing surface 11, and the second housing 20 includes a first surface 21 and a second sealing surface 22. The first surface 21 is used to support the battery cell 101, and the second sealing surface 22 is located on one side of the second housing 20 in a second direction y, which is perpendicular to the direction of gravity. The first sealing surface 11 and the second sealing surface 22 cooperate to form a first sealing interface 103 for sealing the receiving cavity 102, and the first sealing interface 103 intersects with the first surface 21.

[0146] The battery device 100 may include a first housing 10 and a second housing 20, which are connected to each other (e.g., the first housing 10 and the second housing 20 cover each other), and the first housing 10 and the second housing 20 together define a cavity 102 for accommodating a battery cell 101.

[0147] Optionally, the first housing 10 and the second housing 20 can both be hollow structures with one side open, and the open side of the first housing 10 and the open side of the second housing 20 cooperate with each other so that the first housing 10 and the second housing 20 together define the receiving cavity 102 (see reference). Figure 8 Optionally, the first housing 10 can be a hollow structure open at one end, and the second housing 20 can be a plate-like structure. The second housing 20 is disposed on the open side of the first housing 10, so that the first housing 10 and the second housing 20 together define the receiving cavity 102 (see reference). Figure 16 Optionally, the second housing 20 can be a hollow structure open at one end, and the first housing 10 can be a plate-like structure. The first housing 10 is disposed on the open side of the second housing 20, so that the first housing 10 and the second housing 20 together define the receiving cavity 102 (see reference). Figure 24 ).

[0148] Of course, the box 1 formed by the first box 10 and the second box 20 can be of various shapes, such as a cuboid or a cylinder. For example, ... Figure 7 In the middle, box 1 is a cuboid structure.

[0149] Optionally, the battery cell 101 disposed within the receiving cavity 102 can be one or more. For example, the battery device 100 may have multiple battery cells 101, which can be connected in series, parallel, or a combination thereof. A combination thereof means that some of the battery cells 101 are connected in series and others in parallel. The multiple battery cells 101 can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the multiple battery cells 101 is housed within the receiving cavity 102. Alternatively, the battery device 100 may also consist of multiple battery cells 101 first connected in series, parallel, or a combination thereof to form a battery module, and then these battery modules are connected in series, parallel, or a combination thereof to form a whole, which is then housed within the receiving cavity 102.

[0150] In some embodiments, the second housing 20 can be considered as the main part supporting the battery cell 101. For example, in some embodiments, the second housing 20 can be used as the lower housing of the battery device 100, and the first surface 21 of the second housing 20 is the surface supporting the battery cell 101, on which the battery cell 101 can be placed. In some embodiments, the first housing 10 can be considered as a component that cooperates with the second housing 20 to jointly enclose and form the receiving cavity 102. For example, in some embodiments, the first housing 10 can be considered as the upper housing of the battery device 100. In some embodiments, the materials of the first housing 10 and the second housing 20 can be different or the same. In some embodiments, the materials of the first housing 10 and the second housing 20 can be aluminum, aluminum alloy, stainless steel, or plastic, etc. When the second housing 20 is used as the main component supporting the battery cell 101, the second housing 20 can be made of a material with high structural strength, such as aluminum alloy, steel or other materials with high structural strength. The first housing 10 can be made of a material with low density, such as plastic, so that the mass of the first housing 10 does not affect the mass energy density of the battery device 100 as much as possible.

[0151] The first sealing surface 11 is the surface of the first housing 10 used for sealing connection with the second sealing surface 22 of the second housing 20, and the second sealing surface 22 is the surface of the second housing 20 used for sealing connection with the first sealing surface 11 of the first housing 10. In some embodiments, the sealing cooperation of the first sealing surface 11 and the second sealing surface 22 is to achieve the sealing of the receiving cavity 102, so as to reduce the interference of external substances on the battery cell 101 inside the receiving cavity 102.

[0152] In some embodiments, the first sealing surface 11 and the second sealing surface 22 can be connected by welding, bonding or other fasteners (e.g., threaded fasteners).

[0153] In some embodiments, the first sealing interface 103 can be understood as an interface in which the first sealing surface 11 and the second sealing surface 22 are stacked on top of each other in the arrangement direction of the first sealing surface 11 and the second sealing surface 22. Alternatively, the first sealing interface 103 can be understood as an interface that forms an effective seal between the first sealing surface 11 and the second sealing surface 22. Alternatively, the first sealing interface 103 can be understood as an interface in which the space formed between the first sealing surface 11 and the second sealing surface 22 can be used to install a sealant, gasket, or sealant, etc., to achieve an effective seal between the first sealing surface 11 and the second sealing surface 22.

[0154] Please refer to Figure 9 and Figure 10 The first sealing interface 103 can be regarded as the first sealing surface 11 and the second sealing surface 22 being connected to form an interface located between the first sealing surface 11 and the second sealing surface 22 and playing a sealing role.

[0155] The phrase "the first sealing interface 103 intersects with the first surface 21" can be understood as meaning that the plane containing the first sealing interface 103 is perpendicular to or inclined to the plane containing the first surface 21; that is, the plane containing the first sealing interface 103 and the plane containing the first surface 21 are not the same plane or are not parallel. In some embodiments, the first sealing interface 103 may be perpendicular to the first surface 21, for example... Figure 9 In this embodiment, the first surface 21 can be considered as a horizontal plane, and the first sealing interface 103 can be a vertical plane. In other embodiments, the first sealing interface 103 can be inclined to the first surface 21. For example, when the first surface 21 is a horizontal plane, the first sealing interface 103 is an inclined plane, and the angle between the inclined plane and the horizontal plane can be greater than zero degrees and less than ninety degrees.

[0156] Please refer to Figure 7 and Figure 8 The first housing 10 may include a first end wall 12 and a first side wall 13, and the second housing 20 may include a second end wall 23. The first end wall 12 and the second end wall 23 are disposed opposite each other in a third direction z, which is parallel to the direction of gravity. A first surface 21 is formed on the second end wall 23, which is perpendicular to the third direction z. The first side wall 13 may extend along the third direction z, and a first sealing surface 11 parallel to the third direction z is formed on the first side wall 13. The second housing 20 forms a second sealing surface 22 parallel to the third direction z. The first sealing surface 11 and the second sealing surface 22 are connected to each other, and the first sealing interface 103 formed by the two is parallel to the third direction z, that is, perpendicular to the plane where the first surface 21 is located.

[0157] In some embodiments, the second housing 20 includes a second end wall 23 and a second side wall 24, with a first surface 21 located on the second end wall 23, and mounting portions 90 located on the surface of the second end wall 23 facing away from the first surface 21. The mounting portion 90 is a component disposed on the second end wall 23. The mounting portion 90 is used to mount the battery device 100 to the battery rack 1004. The mounting portion 90 can be a nut or connecting bracket, etc., disposed on the second end wall 23. In some embodiments, a crossbeam 91 (e.g., ...) is provided on the second end wall 23. Figure 22 The crossbeam 91 can improve the structural strength of the second end wall 23. The mounting part 90 can be provided on the crossbeam 91. For example, the mounting part 90 can be a threaded hole structure provided on the crossbeam 91. The second end wall 23 is provided with a through hole corresponding to the mounting part 90, so that the mounting component can be connected to the mounting part 90 located on the crossbeam 91 through the through hole of the second end wall 23.

[0158] In the above solution, by setting the first sealing interface 103 to intersect with the first surface 21, that is, the first sealing interface 103 is not parallel to the first surface 21, the projected area of ​​the first sealing member 30 on the plane where the first surface 21 is located can be reduced. This reduces the space occupied by the first sealing interface 103 in the direction parallel to the first surface 21, thereby improving the space utilization rate of the battery device 100 in the direction parallel to the first surface 21. This allows for the accommodation of more battery cells 101 or, while accommodating the same number of battery cells 101, a reduction in the volume of the battery device 100, thereby increasing the volumetric energy density of the battery. In other words, the battery device 100 can fully utilize the space of the battery rack 1004, thereby increasing the energy density of the battery device 100 mounted on the vehicle 1000.

[0159] According to some embodiments of this application, please refer to Figures 4-11 The first sealing interface 103 is perpendicular to the first surface 21.

[0160] In some embodiments, the projection of the first sealing interface 103 falls outside the first surface 21 in the same projection plane perpendicular to the first surface 21.

[0161] The first sealing interface 103 is perpendicular to the first surface 21, which means that the first sealing interface 103 occupies less space in the direction parallel to the first surface 21. That is, there is no need to provide a wall portion for clamping the seal in the direction parallel to the first surface 21, thereby reducing the space occupied by the first sealing interface 103 in the direction parallel to the first surface 21.

[0162] The above solution can further reduce the projected area of ​​the first seal 30 on the plane where the first surface 21 is located, further reduce the space occupied by the first sealing interface 103 in the direction parallel to the first surface 21, and further improve the energy density of the battery device 100.

[0163] According to some embodiments of this application, please refer to Figures 4-11 The first sealing interface 103 is parallel to the direction of gravity.

[0164] In some embodiments, the first sealing interface 103 is perpendicular to the second direction y. This arrangement can improve the space utilization of the battery device 100 in the second direction y.

[0165] In the above solution, the first housing 10 and the second housing 20 can be sealed together without the need for a wall portion forming a sealing interface in a plane perpendicular to the direction of gravity. This improves the space utilization of the battery device 100 in a plane perpendicular to the direction of gravity, so as to accommodate more battery cells 101 or reduce the volume of the battery device 100 when accommodating the same number of battery cells 101.

[0166] According to some embodiments of this application, please refer to Figures 4-11 The first housing 10 includes two first sidewalls 13 arranged opposite each other along the second direction y. The battery compartment 10041 has two first compartment walls arranged opposite each other along the second direction y. Along the second direction y, the minimum distance between the first sidewall 13 and the first compartment wall is H2, which satisfies: 10mm≤H2≤50mm.

[0167] Along the second direction y, the minimum distance between the first sidewall 13 and the first compartment wall can be any value between 10mm and 50mm, for example, any point value or a range between any two of the following: 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm.

[0168] In the above scheme, when H2≥10mm, there is a certain space between the first sidewall 13 and the first compartment wall, which can reduce the risk of damage to the first box 10 caused by friction or collision between the first box 10 and the battery rack 1004, so that the battery device 100 has high reliability; when H2≤50mm, the battery device 100 occupies a high proportion of the space of the battery compartment 10041, and the energy density of the battery device 100 mounted on the vehicle 1000 is high; therefore, when 10mm≤H2≤50mm, the battery device 100 mounted on the vehicle 1000 can balance high reliability and high energy density.

[0169] According to some embodiments of this application, please refer to Figures 4-11A first sealing element 30 is provided between the first sealing surface 11 and the second sealing surface 22. The first sealing element 30 is located on the side of the first sealing surface 11 and the second sealing surface 22 that is far from the receiving cavity 102 and is close to the receiving cavity 102.

[0170] The first sealing element 30 may be a component having sealing properties and disposed between the first sealing surface 11 and the second sealing surface 22. In some embodiments, the first sealing element 30 may be a sealant or a gasket, and the first sealing element 30 is clamped between the first sealing surface 11 and the second sealing surface 22.

[0171] In some embodiments, the first sealing member 30 may be a flat plate-shaped component, and the first sealing surface 11 and the second sealing surface 22 are both tightly fitted to the first sealing member 30, so that the first sealing member 30 is deformed to fill the uneven gap between the first housing 10 and the second housing 20 corresponding to the first sealing surface 11 and the second sealing surface 22, so that an effective seal is formed between the first sealing surface 11 and the second sealing surface 22.

[0172] In some embodiments, the first sealing element 30 can be connected to the first housing 10 and the second housing 20 by abutment, compression, bonding, or other connecting methods (such as threaded connections). For example, the first housing 10 and the second housing 20 can be snap-fitted together, with the first sealing surface 11 and the second sealing surface 22 pressing or abutting against each other under the elasticity of the materials of the first housing 10 and the second housing 20, thereby clamping the first sealing element 30 between the first sealing surface 11 and the second sealing surface 22. For example, the first housing 10 and the second housing 20 can be connected by bolts, with the bolts passing through the first sealing surface 11, the first sealing element 30, and the second sealing surface 22, thereby clamping the first sealing element 30 between the first sealing surface 11 and the second sealing surface 22.

[0173] The phrase "the first sealing element 30 is located on the side of the first sealing surface 11 and the second sealing surface 22 that is far from the receiving cavity 102" can be understood as the arrangement of the first sealing surface 11, the second sealing surface 22, and the second sealing surface 22 not being perpendicular to the first surface 21. In some embodiments, along the second direction y, the first sealing surface 11, the first sealing element 30, and the second sealing surface 22 can be arranged sequentially, wherein the first sealing surface 11 is closer to the receiving cavity 102 than the first sealing element 30 and the second sealing surface 22; in other embodiments, along the second direction y, the second sealing surface 22, the first sealing element 30, and the first sealing surface 11 can be arranged sequentially, wherein the second sealing surface 22 is closer to the receiving cavity 102 than the second sealing element 40 and the second sealing surface 22.

[0174] In the above solution, by providing a first sealing element 30 between the first sealing surface 11 and the second sealing surface 22, the sealing performance between the first sealing surface 11 and the second sealing surface 22 can be effectively improved, reducing the risk of external substances entering the containment cavity 102 and causing damage to the battery cell 101, thereby improving the reliability of the battery device 100.

[0175] According to some embodiments of this application, please refer to Figures 4-11 Along the width direction of the first seal 30 (the width direction of the first seal 30 is indicated by the numeral w in the figure), one end of the first seal 30 is close to the receiving cavity, and the other end of the first seal 30 is close to the outside of the battery. The width direction of the first seal 30 intersects with the first surface 21.

[0176] The width direction, length direction, and thickness direction of the first sealing element 30 are all perpendicular to each other. The thickness direction of the first sealing element 30 can be the arrangement direction of the first sealing surface 11 and the second sealing surface 22; for example, the thickness direction of the first sealing element 30 can be the second direction y.

[0177] In some embodiments, the length direction of the first seal 30 can be parallel to the first surface 21, for example, the length direction of the first seal 30 can be the first direction x. In some embodiments, when both the first direction x and the second direction y are parallel to the first surface 21, and the first direction x and the second direction y are perpendicular to each other, the width direction of the first seal 30 can be perpendicular to the first surface 21. In some embodiments of this application, the direction perpendicular to the first surface 21 is defined as the third direction z. Please refer to... Figure 8 The first seal 30 can extend along the first direction x so as to cover the part between the first sealing surface 11 and the second sealing surface 22 that needs to be sealed in the first direction x, thereby improving the sealing performance of the first sealing surface 11 and the second sealing surface 22.

[0178] In some other embodiments, the length direction of the first seal 30 can be a direction intersecting the first surface 21, for example, the length direction of the first seal 30 can be a third direction z, and the width direction of the first seal 30 can be a direction parallel to the first surface 21, for example, a first direction x. For example, please refer to Figure 24 The second box 20 can be a frame 26. The frame 26 has an opening at its end in the first direction x. The first box 10 is inserted into the second box 20 along the first direction x and the opening is closed. The first sealing surface 11 is perpendicular to the first surface 21. The first sealing surface 11 is parallel to the first direction x and perpendicular to the second direction y. At this time, the width direction of the first sealing member 30 can be parallel to the first direction x, that is, parallel to the first surface 21.

[0179] In the above solution, by setting the width direction of the first sealing member 30 to intersect with the first surface 21, the width direction of the first sealing member 30 is not parallel to the first surface 21. Under the condition that the first sealing member 30 plays a good sealing role, the projected area of ​​the first sealing member 30 on the first surface 21 can be reduced, and the space occupied by the first sealing member 30 in the direction parallel to the first surface 21 can be reduced, thereby improving the space utilization rate of the battery in the direction parallel to the first surface 21 and increasing the volumetric energy density of the battery.

[0180] According to some embodiments of this application, please refer to Figure 12 and Figure 13 The second housing 20 includes a second end wall 23 and a second side wall 24. A first surface 21 is located on the second end wall 23. At least a portion of the second sealing surface 22 is disposed on the second side wall 24. The second side wall 24 is connected to the end of the second end wall 23 in the second direction y. In the same projection plane perpendicular to the second direction y, at least a portion of the orthographic projection of the second side wall 24 is located on the side of the orthographic projection of the first surface 21 that is closer to the battery cell 101.

[0181] The second end wall 23 can be a main part of the second housing 20, having a first surface 21 for carrying the battery device 100. In some embodiments, the first surface 21 is a surface of the second end wall 23 in a third direction z, and the first surface 21 is disposed towards the first housing 10. In some embodiments, the second end wall 23 can be a plate-like structure, and the first surface 21 is a surface of the second end wall 23 in a third direction z, for example, the first surface 21 is the upper surface of the second end wall 23, and the lower surface of the second end wall 23 is the surface away from the receiving cavity 102. In other embodiments, the lower surface of the first end wall 12 is defined as the surface of the second end wall 23 away from the receiving cavity 102, and the upper surface of the first end wall 12 is defined as the surface opposite to the lower surface of the first end wall 12. The first surface 21 can be a portion of the upper surface of the second end wall 23. For example, if the upper surface of the second end wall 23 has a groove, the first surface 21 can be the bottom surface of the groove; or, for example, if the upper surface of the second end wall 23 has a protrusion, the first surface 21 can be the surface of the protrusion.

[0182] The second sidewall 24 is a component disposed at the end of the second endwall 23 in the second direction y. For example, the second sidewall 24 may be disposed on the side of the second endwall 23 in the second direction y, or the second sidewall 24 may be disposed on the upper surface of the second endwall 23 and adjacent to the side of the second endwall 23 in the second direction y. The second sidewall 24 may be connected to the second endwall 23 by means of welding, bonding, or bolting, or the second sidewall 24 may be integrally formed with the second endwall 23.

[0183] In some embodiments, the second end wall 23 may be rectangular, and the second housing 20 may include two second side walls 24, which are spaced apart relative to each other in the second direction y. Each second side wall 24 has a second sealing surface 22, and the first housing 10 has two corresponding first sealing surfaces 11. This eliminates the need for protruding flange structures at both ends of the battery device 100 in the second direction y, effectively improving the space utilization of the battery device 100. In other embodiments, the second housing 20 may include two second side walls 24, with the second sealing surface 22 only on one of the second side walls 24. In still other embodiments, the second housing 20 may include only one second side wall 24, and the portion corresponding to the second side wall 24 in the second direction y can be connected to the second end wall 23 through the structure of the first housing 10.

[0184] The phrase "at least a portion of the second sealing surface 22 is disposed on the second sidewall 24" can be understood as the second sidewall 24 being connected to the first housing 10 and forming a first sealing interface 103 with the first housing 10. Alternatively, it can be understood as at least a portion of the first sealing element 30 being disposed between the second sidewall 24 and the first housing 10. In some embodiments, all of the second sealing surface 22 may be disposed on the second sidewall 24. In some embodiments, a portion of the second sealing surface 22 may be disposed on the second sidewall 24, and the other portion may be disposed on the second end wall 23.

[0185] In some embodiments, the second sidewall 24 may at least partially protrude from the first surface 21, see reference. Figure 8 The second sidewall 24 is used to connect with the side of the first endwall 12, and a portion of the second sidewall 24 protrudes from the first surface 21. The portion of the second sidewall 24 protruding from the first surface 21 can constrain the battery cell 101 located in the receiving cavity 102. The portion of the second sidewall 24 protruding from the first surface 21 can provide more bearing area for the first seal 30 to have a good sealing area, so that the first seal 30 is stably positioned between the first sealing surface 11 and the second sealing surface 22, achieving a good sealing effect.

[0186] The phrase “projected along the second direction y, the projection of the second sidewall 24 is at least partially located on the side of the first surface 21 near the battery cell 101” can be understood as at least part of the second sidewall 24 protruding from the first surface 21, which can also be understood as at least part of the second sealing surface 22 protruding from the first surface 21.

[0187] In some embodiments, please refer to Figure 11Along the second direction y, the projection of the first seal 30 is at least partially located on the side of the first surface 21 near the battery cell 101. "Along the second direction y, the projection of the first seal 30 is at least partially located on the side of the first surface 21 near the battery cell 101" can be understood as at least a portion of the first seal 30 protruding from the first surface 21. For example, a portion of the first seal 30 may be located on the side of the first surface 21 away from the receiving cavity 102, while another portion of the first seal 30 may be located on the side of the first surface 21 near the battery cell 101; or, for example, the entire first seal 30 may be located on the side of the first surface 21 near the battery cell 101. Please refer to... Figure 11 The first sealing element 30 is sandwiched between the first sealing surface 11 and the second sealing surface 22. Along the third direction z, when the first surface 21 is located between the two ends of the first sealing surface 11, the first sealing surface 11 can be partially located below the first surface 21, and the remaining portion can be located above the first surface 21. The second direction y can be the arrangement direction of the first sealing surface 11 and the second sealing surface 22, or it can be the thickness direction of the first sealing surface 11. The projection of the first sealing element 30 in the second direction y is at least partially located on the side of the first surface 21 closest to the battery cell 101. This allows the first sealing element 30 to have a relatively large width while maintaining a small size in the second direction y, thereby improving the sealing performance between the first sealing surface 11 and the second sealing surface 22 without significantly increasing the space occupancy rate in the second direction y, thus enhancing the reliability of the battery device 100.

[0188] In some embodiments, along the second direction y, the projection of the first seal 30 and the projection of the battery cell 101 at least partially coincide. "Along the second direction y, the projection of the first seal 30 and the projection of the battery cell 101 at least partially coincide" can be understood as the projection of the portion of the first seal 30 protruding from the first surface 21 along the second direction y being able to coincide with the projection of the battery cell 101 located in the receiving cavity 102; it can also be understood as the first seal 30 being wider, to the extent that, along the second direction y, the projection of the first seal 30 and the projection of the battery cell 101 at least partially coincide. Please refer to... Figure 11The first sealing element 30 is held between the first sealing surface 11 and the second sealing surface 22. Along a third direction z, the first sealing surface 11 extends to the battery cell 101. In the second direction y, the projection of the first sealing surface 11 at least partially overlaps with the projection of the battery cell 101. The first sealing element 30 can correspondingly extend along the third direction z. Since the projection of the first sealing element 30 in the second direction y at least partially overlaps with the projection of the battery cell 101, at least a portion of the first sealing element 30 can be arranged within the space covered by the projection of the battery cell 101 along the second direction y. This allows the first sealing element 30 to have a small size along the second direction y while having the largest possible sealing width, effectively improving the sealing performance between the first sealing surface 11 and the second sealing surface 22, thus giving the battery device 100 higher reliability.

[0189] In the above scheme, the second housing 20 includes a second end wall 23 and a second side wall 24. The second end wall 23 has a first surface 21 to support the battery. The second sealing surface 22 can be at least partially located on the second side wall 24, so that the thickness of the second end wall 23 does not need to be set too large to meet the width setting requirements of the first sealing element 30. On the basis of meeting the setting requirements of the first sealing element 30, the second housing 20 can be made lighter or the cost can be reduced.

[0190] According to some embodiments of this application, please refer to Figure 14 The second housing 20 includes a second end wall 23, a first surface 21 located on the second end wall 23, and a second sealing surface 22 being a side wall surface of the second end wall 23 perpendicular to the second direction y.

[0191] The side wall surface of the second end wall 23 in the second direction y can form a second sealing surface 22. The side wall surface of the second end wall 23 in the second direction y can be understood as being penetrated by the second direction y, and the side wall surface is perpendicular to the second direction y.

[0192] In some embodiments, the second end wall 23 may be rectangular, and both sidewalls of the second end wall 23 in the second direction y may form second sealing surfaces 22 to seal against the first sealing surface 11 of the first housing 10. In other embodiments, one sidewall of the second end wall 23 in the second direction y may form a second sealing surface 22 to seal against one of the first sealing surfaces 11 of the first housing 10.

[0193] In the above scheme, on the one hand, the second end wall 23 of the second housing 20 can serve as a component for supporting the battery cell 101. On the other hand, the second end wall 23 of the second housing 20 also has a second sealing surface 22 to connect with the first sealing surface 11 of the first housing 10. Thus, while setting the second housing 20 to a simpler structure, the sealing requirements of the first sealing surface 11 and the second sealing surface 22 are met, which can reduce the processing cost of the second housing 20.

[0194] According to some embodiments of this application, please refer to Figure 15 The first housing 10 includes a first end wall 12 and a first side wall 13 connected to each other. The first end wall 12 includes a first end wall surface 120 disposed opposite to the first surface 21. At least a portion of the first sealing surface 11 is disposed on the first side wall 13. At least a portion of the first side wall 13 is located on the side of the first end wall surface 120 close to the first surface 21.

[0195] The first housing 10 includes a first end wall 12 and a first side wall 13 connected to each other. The first end wall 12 includes a first end wall surface 120 disposed opposite to the first surface 21. At least a portion of the first sealing surface 11 is disposed on the first side wall 13. At least a portion of the first side wall 13 is located on the side of the first end wall surface 120 close to the first surface 21.

[0196] The first end wall 12 may be disposed opposite to the second end wall 23. In some embodiments, the first housing 10 may be the upper housing of the battery device 100, the second housing 20 may be the lower housing of the battery device 100, the first end wall 12 may be the top cover or top wall of the battery device 100, and the second end wall 23 may be the bottom plate or bottom wall of the battery device 100. The first end wall surface 120 is the surface of the first end wall surface 120 facing the first surface 21, and the first end wall surface 120 may be the inner surface of the first end wall 12.

[0197] The first sidewall 13 is the part that connects to the first endwall 12. In some embodiments, the first sidewall 13 is bent relative to the first endwall 12 and extends toward the second housing 20. For example, the first sidewall 13 and the first endwall 12 are arranged perpendicularly, and the first sidewall 13 extends along a third direction z. The first sidewall 13 can be connected to the first endwall 12 by welding, bonding, or bolting, or the first sidewall 13 can be integrally formed with the first endwall 12.

[0198] "At least a portion of the first sealing surface 11 is disposed on the first side wall 13" can be understood as follows: one end of the first side wall 13 is connected to the first end wall 12, and the other end is connected to the second sealing surface 22. That is, the first side wall 13 connects the first end wall 12 and the second end wall 23 to each other, and the end of the first side wall 13 away from the first end wall 12 is directly or indirectly connected to the second sealing surface 22. Thus, it can be understood that the connection surface between the first side wall 13 and the second housing 20 is located on the second sealing surface 22 and does not protrude from the outer contour of the first housing 10 and the second housing 20 in the second direction y.

[0199] The first sidewall 13 is provided with a first sealing surface 11 to connect with the second sealing surface 22 of the second housing 20. For example, in some embodiments, the first sealing surface 11 of the first sidewall 13 is connected with the second sealing surface 22 of the second sidewall 24. Or in other embodiments, the first sealing surface 11 of the first sidewall 13 is connected with the second sealing surface 22 of the second endwall 23.

[0200] The first sealing surface 11 can be formed on the outer surface of the first sidewall 13 or on the inner surface of the first sidewall 13. For example, when the first sidewall 13 is connected to the second sidewall 24, and the second sidewall 24 is closer to the receiving cavity 102 than the first sidewall 13, the first sealing surface 11 is formed on the inner surface of the first sidewall 13.

[0201] "At least a portion of the first sidewall 13 is located on the side of the first endwall 120 near the first surface 21" can be understood as the first sidewall 13 protruding from the first endwall 120 in the direction from the first endwall 12 to the second endwall 23.

[0202] The first sidewall 13 may be disposed at the end of the first endwall 12 in the second direction y. For example, the first sidewall 13 may be connected to the side of the first endwall 12 in the second direction y; or the first sidewall 13 may be connected to the first endwall surface 120 and adjacent to the side of the first endwall 12 in the second direction y.

[0203] In some embodiments, when the battery device 100 is a square battery device 100, that is, when the first end wall 12 is a square end wall, the number of first side walls 13 can be two, and each of the two side walls is provided with a first sealing surface 11 to seal with the two second sealing surfaces 22 of the second housing 20 respectively; or the number of first side walls 13 can be two, and one of the two first side walls 13 is provided with a first sealing surface 11 to seal with the first sealing surface 11 of the second housing 20. Or the number of first side walls 13 can be one, and the first side wall 13 is connected to the second end wall 23 or the second side wall 24.

[0204] In the above scheme, the first housing 10 includes a first end wall 12 and a first side wall 13 that are connected to each other. By setting at least a portion of the first side wall 13 to be located on the side of the first end wall 120 close to the first surface 21, on the one hand, the first housing 10 and the second housing 20 can be enclosed to form a receiving cavity 102 for accommodating the battery cell 101. On the other hand, the first sealing surface 11 is formed on the first side wall 13, which can make the area of ​​the first sealing surface 11 larger, so as to form a good connection relationship and good sealing performance with the second sealing surface 22, so that the battery device 100 has high reliability.

[0205] According to some embodiments of this application, at least a portion of the first sidewall 13 is located on the side of the first surface 21 away from the battery cell 101.

[0206] The phrase "at least a portion of the first sidewall 13 is located on the side of the first surface 21 away from the battery cell 101" can be understood as meaning that, along the direction from the first end wall 12 to the second end wall 23, the end of the first sidewall 13 can extend beyond the first surface 21, that is, as... Figure 6 As shown, the first sealing surface 11 can extend beyond the first surface 21. That is, in the second direction y, the projection of the first sidewall 13 and the projection of the second endwall 23 at least partially coincide. In some embodiments, please refer to Figure 7 The end of the first sidewall 13 can be parallel to the lower surface of the second endwall 23.

[0207] In some embodiments, the height of the receiving cavity 102 in the battery device 100 can be defined by the first end wall 12 and the second end wall 23. In order to keep the battery cell 101 in a closed space, a surrounding member, such as the first side wall 13 and the second side wall 24, needs to be provided between the first end wall 12 and the second end wall 23. As the main load-bearing component of the battery device 100, the second housing 20 is made of a material with high density and high cost. In order to reduce the weight and cost of the battery device 100 as much as possible, the second side wall 24 of the second housing 20 is eliminated, that is, the first side wall 13 is connected to the second end wall 23. Alternatively, under the condition that the first sealing surface 11 and the second sealing surface 22 have good sealing performance, the second side wall 24 of the second housing 20 can be made as low as possible and connected to the first side wall 13.

[0208] In the above scheme, at least a portion of the first sidewall 13 is located on the side of the first surface 21 away from the battery cell 101. This can also be understood as at least a portion of the first sealing surface 11 being located on the side of the first surface 21 away from the battery cell 101. On the one hand, this allows the area of ​​the first sealing surface 11 to be as large as possible, so as to form a better connection stability and sealing performance with the second sealing surface 22. On the other hand, when the first sealing surface 11 and the second sealing surface 22 are connected to each other by other connectors, since the first surface 21 is the surface of the second end wall 23, the second end wall 23 can provide a larger connection dimension for the connector along the second direction y, so as to improve the connection strength between the first sealing surface 11 and the second sealing surface 22, reduce the risk of the first sealing surface 11 and the second sealing surface 22 detaching from each other, and make the battery device 100 have higher reliability.

[0209] According to some embodiments of this application, please refer to Figure 12 The second housing 20 also includes a third side wall 25, which is disposed at the end of the second end wall 23 in the first direction x, and extends toward the first housing 10 and is connected to the first housing 10.

[0210] The third sidewall 25 is a component disposed at the end of the second endwall 23 in the first direction x. The third sidewall 25 can be connected to the second endwall 23 by means of welding, bonding, or bolting, or the third sidewall 25 can be integrally formed with the second endwall 23. The third sidewall 25 can improve the structural strength of the second endwall 23, so that the second endwall 23 can stably support the battery cell 101. In some embodiments, the third sidewall 25 can be used to install components such as explosion-proof valves, water-cooled connectors, or high and low voltage connectors.

[0211] In some embodiments, the third sidewall 25 may be disposed on the side of the second endwall 23 in the first direction x, and the third sidewall 25 may be disposed on the first surface 21 and adjacent to the side of the second endwall 23 in the first direction x.

[0212] In some embodiments, the battery device 100 can be a square battery device 100, the first end wall 12 is a square end wall, the first direction x can be the length direction of the first end wall 12, and the second direction y can be the width direction of the first end wall 12. Please refer to... Figure 7 and Figure 10 The first housing 10 includes two first sidewalls 13, which are spaced apart to form an opening. A third sidewall 25 can close the opening. In some embodiments, a plurality of first sidewalls 13 and a plurality of third sidewalls 25 surround the outer periphery of the receiving cavity 102.

[0213] The third sidewall 25 can be connected to the first housing 10 by welding, bonding, or bolting.

[0214] In some embodiments, a portion of the third sidewall 25 may be connected to the first end wall surface 120 of the first end wall 12, and another portion of the third sidewall 25 may be connected to the first sidewall 13. In some embodiments, a portion of the third sidewall 25 may be connected to the side surface of the first end wall 12 in the first direction x, and another portion of the third sidewall 25 may be connected to the first sidewall 13. In some embodiments, the first housing 10 is provided with a portion corresponding to the third sidewall 25 but not the first end wall 12 or the first sidewall 13, for connection to the third sidewall 25.

[0215] In the above scheme, by providing a third sidewall 25 at the end of the second endwall 23 in the first direction x, the second endwall 23 can be connected to the first housing 10 in the first direction x through the third sidewall 25, thereby improving the connection stability of the first housing 10 and the second housing 20, and thus improving the reliability of the battery device 100.

[0216] In some other embodiments, reference is made to Figure 16 The second housing 20 may not have a third side wall 25, while the first housing 10 may have a third side wall 25. That is, one end of the third side wall 25 is connected to the first end wall 12, and the other end is connected to the second housing 20. For example, the other end of the third side wall 25 may be connected to the second end wall 23 or other components mounted on the second end wall 23. This design effectively reduces the weight and cost of the battery device 100 when the second housing 20 is made of a high-density, high-cost material.

[0217] According to some embodiments of this application, please refer to Figure 17 and Figure 18 The third sidewall 25 includes a first flat surface 250 that is opposite to the first surface 21 and a second flat surface 251 that is intersecting the second direction y. The first flat surface 250 is used for sealing connection with the first end wall 12, and the second flat surface 251 is used for sealing connection with the first sidewall 13.

[0218] The first flat surface 250 is a flat surface located on the third sidewall 25. In some embodiments, along the third direction z, the first flat surface 250 is the surface of the third sidewall 25 facing the first end wall 12. The first flat surface 250 is sealed to the first end wall 12, for example, the first flat surface 250 is in surface contact with the first end wall surface 120, and the two are tightly attached. The first flat surface 250 can be connected to the first end wall 12 by welding, bonding, or bolting. In some embodiments, the first flat surface 250 can be connected to the first end wall 12 by other components, for example, referring to... Figure 13 The first end wall 12 is provided with a connecting part 17, which is plate-shaped and part of the connecting part 17 is connected to the first flat surface 250.

[0219] The second straight surface 251 is a straight surface located on the third sidewall 25 and intersecting with the first straight surface 250. In some embodiments, along the second direction y, the second straight surface 251 is the surface of the third sidewall 25 facing the first sidewall 13, and the second straight surface 251 is sealed to the first sidewall 13, for example, the second straight surface 251 and the first sidewall 13 cooperate with each other and are in close contact. The second straight surface 251 can be connected to the first sidewall 13 by welding, bonding, or bolting. In some embodiments, the second straight surface 251 can be connected to the first sidewall 13 by other components, for example, referring to... Figure 13 The first sidewall 13 is provided with a connecting part 17, which is plate-shaped, and part of the connecting part 17 is connected to the second flat surface 251.

[0220] In the above scheme, the third sidewall 25 is connected to the first housing 10 via the first flat surface 250 and the second flat surface 251, which can effectively improve the connection stability and sealing of the first housing 10 and the second housing 20, thus giving the battery device 100 higher reliability. The second flat surface 251 intersects with the second direction y and is used for a sealed connection with the first sidewall 13, thereby effectively improving the space utilization of the battery device 100 in the second direction y, and thus increasing the volumetric energy density of the battery.

[0221] According to some embodiments of this application, please refer to Figure 8 The battery also includes a second seal 40, which is disposed between the third sidewall 25 and the first housing 10.

[0222] The second seal 40 may be a component with sealing properties and disposed between the third sidewall 25 and the first housing 10. In some embodiments, the first seal 30 may be a sealant or a gasket, and the second seal 40 is clamped between the third sidewall 25 and the first housing 10.

[0223] In some embodiments, the second seal 40 may be a flat plate-shaped component, and the third sidewall 25 and the first housing 10 are both tightly fitted to the second seal 40, causing the second seal 40 to deform to fill the uneven gap between the first housing 10 and the third sidewall 25.

[0224] In some embodiments, the first seal 30 can be connected to the first housing 10 and the third sidewall 25 by abutment, compression, bonding, or other connecting methods (e.g., threaded connections). For example, the first housing 10 and the second housing 20 can be pressed or abutted against each other by the elasticity of their materials, thereby clamping the second seal 40 between the first housing 10 and the third sidewall 25. For example, the first housing 10 and the second housing 20 can be connected by bolts, thereby clamping the second seal 40 between the third sidewall 25 and the first housing 10.

[0225] In the above solution, by providing a second sealing element 40 between the third sidewall 25 and the first housing 10, the sealing performance between the third sidewall 25 and the first housing 10 can be effectively improved, thus making the battery device 100 have higher reliability.

[0226] According to some embodiments of this application, please refer to Figure 17 The first flat surface 250 and the second flat surface 251 are connected by a transition surface 252. The transition surface 252 includes a slope 2520 and / or an arc surface 2521. A mating surface 170 is formed at the connection between the first end wall 12 and the first side wall 13. The mating surface 170 is provided corresponding to the transition surface 252.

[0227] The transition surface 252 is the part that connects the first flat surface 250 and the second flat surface 251. By setting the transition surface 252, the first flat surface 250 and the second flat surface 251 can be smoothly transitioned.

[0228] In some embodiments, the transition surface 252 includes a sloped surface 2520 and an arcuate surface 2521, for example... Figure 17 In this embodiment, the transition surface 252 includes two inclined surfaces 2520 and an arcuate surface 2521 located between the two inclined surfaces 2520. One inclined surface 2520 connects to the first straight surface 250, and the other inclined surface 2520 connects to the second straight surface 251. In some other embodiments, the transition surface 252 may include the inclined surface 2520. In some other embodiments, the transition surface 252 may include the arcuate surface 2521, for example, the first straight surface 250 and the second straight surface 251 are connected by the arcuate surface 2521.

[0229] The mating surface 170 is used to mate with the transition surface 252. The mating surface 170 and the transition surface 252 mate with each other to provide a good seal between the third sidewall 25 and the first housing 10. In some embodiments, the mating surface 170 may include a beveled surface 2520 and an arcuate surface 2521, for example... Figure 17In this embodiment, the transition surface 252 includes two arcuate surfaces 2521 and an inclined surface 2520 located between the two arcuate surfaces 2521. One arcuate surface 2521 connects to the first straight surface 250, and the other arcuate surface 2521 connects to the second straight surface 251. Alternatively, in some embodiments, the first housing 10 is provided with a connecting portion 17, which connects to the first end wall 12 and the second side wall 24. A portion of the connecting portion 17 mates with the first straight surface 250, and the remaining portion of the connecting portion 17 forms a mating surface 170 to mate with the transition surface 252.

[0230] In the above scheme, by setting a transition surface 252, the first flat surface 250 and the second flat surface 251 can transition smoothly. On the one hand, this facilitates the second seal 40 to fit tightly against the surface where the third side wall 25 and the first housing 10 are connected. On the other hand, it reduces the risk of the second seal 40 being damaged due to the interference of the edges between the first flat surface 250 and the second flat surface 251, resulting in sealing failure. This makes the battery more reliable.

[0231] According to some embodiments of this application, please refer to Figure 19 The second sealing element 40 includes a first sub-sealing element 41, a second sub-sealing element 42, and a third sub-sealing element 43. The first sub-sealing element 41 is disposed between the first flat surface 250 and the first end wall 12, the second sub-sealing element 42 is disposed between the second flat surface 251 and the first side wall 13, and the third sub-sealing element 43 is disposed between the transition surface 252 and the mating surface 170.

[0232] The first sub-seal 41 is disposed corresponding to the first flat surface 250. In some embodiments, the first sub-seal 41 is clamped and deformed by the first flat surface 250 and the first end wall 12. The second sub-seal 42 is disposed corresponding to the second flat surface 251. In some embodiments, the second sub-seal 42 is clamped and deformed by the second flat surface 251 and the first side wall 13. The third sub-seal 43 corresponds to the transition surface 252, for example, in conjunction with... Figure 17 and Figure 19 The third sub-seal 43 includes a portion corresponding to the inclined surface 2520 and a portion corresponding to the arcuate surface 2521. In some embodiments, the third sub-seal 43 is held and deformed by the transition surface 252 and the mating surface 170.

[0233] In the above solution, by setting the second sealing element 40 as the first sub-sealing element 41, the second sub-sealing element 42, and the third sub-sealing element 43, and by setting the first sub-sealing element 41, the second sub-sealing element 42, and the third sub-sealing element 43 respectively between the first flat surface 250 and the first end wall 12, between the second flat surface 251 and the first side wall 13, and between the transition surface 252 and the mating surface 170, the second sealing element 40 can be tightly attached to the surface where the third side wall 25 and the first housing 10 are connected, thereby improving the sealing performance between the first housing 10 and the second housing 20, and thus making the battery device 100 have higher reliability.

[0234] Please refer to Figure 20 and Figure 21 In some embodiments, the first housing 10 further includes a fourth sidewall 14, which is adjacent to the first sidewall 13. One end of the fourth sidewall 14 is connected to the first endwall 12, and the third sidewall 25 is connected to the fourth sidewall 14.

[0235] The fourth sidewall 14 is a component that protrudes from the first end wall 120 and is adjacent to the first sidewall 13. The fourth sidewall 14 can be welded, bonded, or bolted to the first end wall 12, or it can be integrally formed with the first end wall 12. When the first housing 10 has two first sidewalls 13 arranged opposite each other along the second direction y, the fourth sidewall 14 is located between the two first sidewalls 13, and one end of the fourth sidewall 14 is connected to the first end wall 12. The opposite ends of the fourth sidewall 14 in the second direction y are respectively connected to the two first sidewalls 13.

[0236] In some embodiments, the fourth sidewall 14 has a portion for connecting with a first flat surface 250 of the third sidewall 25, a portion for connecting with a second flat surface 251, and a mating surface 170 for connecting with a transition surface 252. In some embodiments, combined with Figures 17-21 By setting a fourth sidewall 14, the size of the third sidewall 25 in the third direction z can be reduced. That is, the larger the size of the fourth sidewall 14 in the third direction z, the smaller the size of the third sidewall 25 in the first direction x can be.

[0237] In some embodiments, the first housing 10 can be an upper housing and the second housing 20 can be a lower housing. The material cost and density of the upper housing can be lower than those of the lower housing. Therefore, by providing a fourth sidewall 14, the proportion of the first housing 10 in the battery device 100 is increased, thereby effectively reducing the manufacturing cost of the battery device 100 and increasing the weight energy density of the battery device 100.

[0238] In some other embodiments, please refer to Figure 22The dimension of one of the third sidewalls 25 in the third direction z is smaller than the dimension of the other third sidewall 25 in the third direction z.

[0239] The dimension of the third sidewall 25 in the third direction z can be considered as the height of the third sidewall 25. Since the heights of the two third sidewalls 25 are different, the resulting height difference can be compensated by the first housing 10. The larger third sidewall 25 can be used to install components such as explosion-proof valves, water-cooled connectors, or high and low voltage connectors. By reducing the size of the other third sidewall 25, the size of the portion of the first housing 10 corresponding to the third sidewall 25 can be adaptively increased, for example, by providing a fourth sidewall 14 or increasing the size of the fourth sidewall 14, thereby increasing the proportion of the first housing 10 in the battery device 100, thus reducing the manufacturing cost of the battery device 100 and increasing the weight energy density of the battery device 100.

[0240] According to some embodiments of this application, please refer to Figure 11 The battery also includes a first fastener 50, which passes through the first sealing interface 103 along the second direction y and is locked inside the second end wall 23.

[0241] The first fastener 50 is a component capable of connecting the first housing 10 and the second housing 20. In some embodiments, one end of the first fastener 50 can pass through the first sealing surface 11 and the second sealing surface 22 along the second direction y and lock into the interior of the second end wall 23. For example, combined with Figure 8 and Figure 11 One end of the first fastener 50 can pass through the first sidewall 13 and the first seal 30 and be locked into the interior of the second endwall 23. The first fastener 50 can be a connecting member with external threads, such as a bolt or screw. The first fastener 50 can also be a connecting member such as a pin or rivet.

[0242] In some embodiments, the first fastener 50 is a bolt, the first sidewall 13 and the first seal 30 are respectively provided with through holes, and the second endwall 23 is formed with a threaded hole. The bolt can pass through the through holes on the first sidewall 13 and the first seal 30 and be locked into the threaded hole.

[0243] In some embodiments, the first fastener 50 may not be locked into the second end wall 23, but may be locked into the second side wall 24.

[0244] In some embodiments, please refer to Figure 11 The portion of the first fastener 50 that is locked into the second end wall 23 is located on the side of the first surface 21 away from the receiving cavity 102. For example... Figure 11As shown, when the upper part of the first surface 21 is the receiving cavity 102, the lower part of the first surface 21 can be understood as the side of the first surface 21 away from the receiving cavity 102. The portion of the first fastener 50 that locks into the second end wall 23 is located on the side of the first surface 21 away from the receiving cavity 102. This can be understood as the first end wall 12 providing a deeper locking depth for the first fastener 50. For example, in the third direction z, the projection of the first fastener 50 can fall into the projection of the first surface 21. In other embodiments, please refer to... Figure 23 The portion of the first fastener 50 that locks into the second end wall 23 can also be located on the side of the first surface 21 near the receiving cavity 102. In this embodiment, the first surface 21 is recessed from the edge of the first end wall 12, and the first fastener 50 can lock into the edge of the first end wall 12 and be located on the side of the first surface 21 near the receiving cavity 102. By setting the portion of the first fastener 50 that locks into the second end wall 23 to be located on the side of the first surface 21 away from the receiving cavity 102, on the one hand, the first fastener 50 does not occupy the receiving cavity 102, which can improve the utilization rate of the receiving cavity 102 and increase the volumetric energy density of the battery device 100. It can also reduce the risk of interference between the first fastener 50 and the battery cell 101. On the other hand, the second end wall 23 can provide a deeper locking depth for the first fastener 50, so that the first fastener 50 can be firmly locked to the second end wall 23, improving the connection stability of the first housing 10 and the second housing 20, and making the battery device 100 have higher reliability.

[0245] In some embodiments, the projection of the first fastener 50 at least partially coincides with the projection of the battery cell 101. "The projection of the first fastener 50 at least partially coincides with the projection of the battery cell 101 along a direction perpendicular to the first surface 21" can be understood as the first fastener 50 being locked to the second end wall 23 at a greater depth. That is, the first fastener 50 extends along its locking direction, for example, along the second direction y, and the portion extending into the second end has its projection in the third direction z at least partially coincide with the projection of the battery cell 101 located within the receiving cavity 102. Projecting along a direction perpendicular to the first surface 21, the projection of the first fastener 50 at least partially coincides with the projection of the battery cell 101, so that the second end wall 23 provides a deeper locking depth for the first fastener, allowing the first fastener 50 to be securely locked to the second end wall 23, improving the connection stability of the first housing 10 and the second housing 20, and giving the battery device 100 higher reliability.

[0246] In the above solution, by setting the first fastener 50 to pass through the first sealing interface 103 and lock it into the interior of the second end wall 23, the connection stability of the first housing 10 and the second housing 20 can be effectively improved, thereby improving the structural stability of the battery device 100 and making the battery device 100 have high reliability.

[0247] According to some embodiments of this application, please refer to Figure 8 and Figure 12 The second housing 20 also includes a third side wall 25, which is disposed at the end of the second end wall 23 in the first direction x. The battery also includes a second fastener 51, which is used to connect the third side wall 25 and the first housing 10. The second fastener 51 is locked into the interior of the third side wall 25.

[0248] The second fastener 51 is a component capable of connecting the first housing 10 and the third sidewall 25. In some embodiments, one end of the second fastener 51 may pass through the first housing 10 and lock into the interior of the third sidewall 25.

[0249] The second fastener 51 can be a connecting member with external threads, such as a bolt or screw. The second fastener 51 can also be a connecting member such as a pin or rivet.

[0250] In some embodiments, the second fastener 51 is a bolt, the first housing 10 and the second sealing member 40 are respectively provided with through holes, and the third sidewall 25 is formed with a threaded hole. The bolt can pass through the through holes on the first housing 10 and the second sealing member 40 and be locked into the threaded hole of the third sidewall 25.

[0251] Please refer to Figure 17 The threaded hole can be set on a flat surface to allow the bolt to connect the first housing 10 and the third sidewall 25. Figure 17 In the first flat surface 250, the second flat surface 251, and the inclined surface 2520 of the transition surface 252 are respectively provided with threaded holes.

[0252] In the above scheme, by providing a third side wall 25 at the end of the second end wall 23 in the first direction x, and connecting the third side wall 25 and the first housing 10 by the second fastener 51, a stable connection relationship can be achieved between the third side wall 25 and the first housing 10, thereby improving the connection stability between the first housing 10 and the second housing 20, and thus improving the reliability of the battery device 100.

[0253] According to some embodiments of this application, in the same projection plane perpendicular to the first direction x, the orthographic projection of the second fastener 51 does not overlap with the orthographic projection of the mounting portion 90.

[0254] In the same projection plane perpendicular to the first direction x, the orthographic projection of the second fastener 51 does not overlap with the orthographic projection of the mounting portion 90, which means that the risk of the second fastener 51 colliding with the mounting portion 90 is low during the process of the battery device 100 being installed into the battery rack 1004 along the first direction x.

[0255] In the above scheme, during the process of the battery device 100 being installed into the battery rack 1004 along the first direction x, the risk of the second fastener 51 colliding with the mounting part 90 is low, thereby reducing the risk of damage to the battery device 100 and the battery rack 1004 during assembly and improving the reliability of the battery device 100.

[0256] According to some embodiments of this application, please refer to Figure 24 A first sealing element 30 is provided between the first sealing surface 11 and the second sealing surface 22. Along the width direction of the first sealing element 30, one end of the first sealing element 30 is close to the receiving cavity, and the other end of the first sealing element 30 is close to the outside of the battery. The width direction of the first sealing element 30 is parallel to the first surface 21.

[0257] A first sealing element 30 is provided between the first sealing surface 11 and the second sealing surface 22. Along the width direction of the first sealing element 30, one end of the first sealing element 30 is close to the receiving cavity 102, and the other end of the first sealing element 30 is close to the outside of the battery device 100. The width direction of the first sealing element 30 is parallel to the first surface 21.

[0258] In some embodiments, the length direction of the first seal 30 can be the direction intersecting the first surface 21, for example, the length direction of the first seal 30 can be a third direction z, and the width direction of the first seal 30 can be a direction parallel to the first surface 21, for example, a first direction x. For example, please refer to Figure 19 The second box 20 can be a frame 26. The frame 26 has an opening at its end in the first direction x. The first box 10 is inserted into the second box 20 along the first direction x and the opening is closed. The first sealing surface 11 is perpendicular to the first surface 21. The first sealing surface 11 is parallel to the first direction x and perpendicular to the second direction y. At this time, the width direction of the first sealing member 30 can be parallel to the first direction x, that is, parallel to the first surface 21.

[0259] In some embodiments, please refer to Figure 24 The second housing 20 includes a frame 26 with an opening along a first direction x. The first housing 10 includes a stopper 15, which is at least partially inserted into the frame 26 along the first direction x and closes the opening. The frame 26 may refer to a cavity inside the second housing 20, which is enclosed by the walls of the second housing 20. (See reference...) Figure 24The frame 26 can be a cube with an internal cavity. An opening is formed at one end of the frame 26 in the first direction x, connecting to the interior of the frame 26. The first housing 10 may include a stopper plate 15, which connects to the frame 26 to close the opening, allowing the battery cell 101 to be inside the frame 26, i.e., within the receiving cavity 102. "The stopper plate 15 is at least partially inserted into the interior of the frame 26 along the first direction x" can be understood as the stopper plate 15 being inserted into the frame 26 to close the opening; for example, the outer contour of the stopper plate 15 corresponds to the opening, and the stopper plate 15 is embedded in the opening to close it; it can also be understood as a portion of the stopper plate 15 being inserted into the frame 26 to connect with the frame 26 and close the opening. The plug plate 15 can be inserted into the interior of the frame 26 along the first direction x to close the opening, so that it does not occupy additional space in the second direction y. That is, the maximum size of the outer contour of the battery device 100 can be the maximum size of the outer contour of the frame 26, so that the battery device 100 has a high space utilization rate to accommodate more battery cells 101 or a smaller volume, so that the battery device 100 has a high volumetric energy density.

[0260] In some embodiments, please refer to Figure 25 The first housing 10 further includes an extension wall panel 16, at least a portion of the first sealing surface 11 is disposed on the extension wall panel 16, the extension wall panel 16 is disposed at the end of the plug plate 15 in the second direction y, and the plug plate 15 has a sealing surface facing the battery cell 101. Projected along the second direction y, the projection of the extension wall panel 16 is at least partially located on the side of the sealing surface near the battery cell 101. The plug plate 15 can be a component of the first housing 10 for closing the opening of the frame 26. The surface of the plug plate 15 facing the receiving cavity 102 is the sealing surface. The extension wall panel 16 is a component disposed on the plug plate 15. In some embodiments, the extension wall panel 16 is disposed on the side of the plug plate 15 in the second direction y, or the extension wall panel 16 is disposed on the sealing surface of the plug plate 15 and adjacent to the side of the plug plate 15 in the second direction y, or the extension wall portion is connected to the plug plate 15 and adjacent to the side of the plug plate 15 in the second direction y. The first housing 10 is inserted into the opening of the frame 26 along the first direction x, the plug plate 15 closes the opening of the frame 26, and the extension wall panel 16 passes through the opening and connects to the frame 26. Alternatively, the first housing 10 is inserted into the opening of the frame 26 along the first direction x, the plug plate 15 closes the opening of the frame 26, and the extension wall panel 16 connects to the frame 26. "At least a portion of the first sealing surface 11 is disposed on the extension wall panel 16" can be understood as the extension wall panel 16 having at least a portion of the first sealing surface 11 to connect with the second sealing surface 22 of the second housing 20. In some embodiments, refer to... Figure 25The plug plate 15 is provided with two extended wall plates 16, which are spaced apart along the second direction y and connected to the frame 26 respectively. Each of the two extended wall plates 16 has two opposing surfaces in the second direction y, which can each form a first sealing surface 11. At least a portion of the first sealing surface 11 can be formed on the outer surface of the extended wall plate 16, and the first sealing surface 11 can be connected to the inner wall surface of the frame 26. Alternatively, at least a portion of the first sealing surface 11 can also be formed on the inner surface of the extended wall plate 16, and the first sealing surface 11 can be connected to the outer wall surface of the frame 26. In some other embodiments, a portion of the first sealing surface 11 can be disposed on the extended wall plate 16, and another portion of the first sealing surface 11 can be disposed on the plug plate 15. Please refer to... Figure 19 The sealing surface of the plug plate 15 can be provided with an annular extension wall, and the extension wall has a first sealing surface 11 in the second direction y. In some embodiments, the first sealing surface 11 is formed on the outer side of the extension wall, the extension wall is embedded in the opening, and the outer side of the extension wall can be connected to the hole wall of the opening. The hole wall of the opening can be the inner wall surface of the frame 26. In the above embodiments, on the one hand, by providing the extension wall plate 16, the area of ​​the first sealing surface 11 can be set as large as possible, so that the first sealing surface 11 can be effectively connected with the second sealing surface 22 of the second housing 20, thereby improving the connection stability of the first housing 10 and the second housing 20 and improving the reliability of the battery device 100; on the other hand, by setting at least part of the projection of the extension wall plate 16 along the second direction y to be located on the side of the sealing surface close to the battery cell 101, the extension wall plate 16 can be prevented from extending outward, thereby making the overall size of the battery device 100 along the first direction x smaller, thereby improving the space utilization of the battery device 100 in the first direction x, and making the battery device 100 have a higher volumetric energy density.

[0261] In some embodiments, along the second direction y, the projection of the first seal 30 is at least partially located on the side of the cover surface near the battery cell 101. "The side of the cover surface near the battery cell 101" can be understood as the inner side of the cover surface, and the side of the cover surface away from the battery cell 101 can be understood as the outer side of the cover surface. "Along the second direction y, the projection of the first seal 30 is at least partially located on the side of the cover surface near the battery cell 101" can be understood as a portion of the first seal 30 being located within the receiving cavity 102. Setting the projection of the first seal 30 along the second direction y to be at least partially located on the side of the cover surface near the battery cell 101 improves the sealing performance between the extension wall panel 16 and the second housing 20. Furthermore, by placing a portion of the first seal 30 within the receiving cavity 102, the first seal 30 minimizes its occupation of space outside the battery device 100 in the first direction x, thereby improving the space utilization of the battery device 100 in the first direction x and enabling the battery device 100 to have a higher volumetric energy density.

[0262] In some embodiments, along the second direction y, the projection of the first seal 30 at least partially coincides with the projection of the battery cell 101. The first sealing surface 11 can extend into the receiving cavity 102, and along the second direction y, the projections of the first sealing surface 11 and the second sealing surface 22 can at least partially coincide with the projection of the battery cell 101, so that the first housing 10 and the second housing 20 have a large connection area and a large sealing area. Correspondingly, the first seal 30 located between the first sealing surface 11 and the second sealing surface 22 also has a large area. Setting the projection of the first seal 30 along the second direction y to at least partially coincide with the projection of the battery cell 101 allows the first seal 30 to occupy as little space as possible in the first direction x, thereby improving the space utilization rate of the battery device 100 in the first direction x, accommodating more battery cells 101 or a smaller volume, and enabling the battery device 100 to have a higher volumetric energy density.

[0263] In some embodiments, the second sealing surface 22 is disposed on the inner wall surface of the frame 26, and at least a portion of the first sealing surface 11 is disposed on the outer wall surface of the plug plate 15. For example Figure 24In some embodiments, the outer contour of the plug plate 15 is smaller than that of the frame 26, and the plug plate 15 can be embedded in the opening. In some embodiments, the first sealing surface 11 can be disposed on the outer wall surface of the plug plate 15, and the second sealing surface 22 can be disposed on the inner wall surface of the frame 26. In other embodiments, the outer contour of the first housing 10 can be larger than that of the frame 26, and the first housing 10 can be fitted onto the frame 26. In some embodiments, the second sealing surface 22 can be disposed on the outer wall surface of the frame 26. The outer wall surface of the plug plate 15 can be provided with the first sealing surface 11 to connect with the inner wall surface of the frame 26, eliminating the need for an additional connecting wall, thus simplifying the processing of the housing 1 and saving processing costs.

[0264] In some embodiments, please refer to Figure 25 The battery device 100 further includes a first connector 52, which passes through the first sealing interface 103 along the second direction y and is locked into the plug plate 15. The first connector 52 is a component capable of connecting the first housing 10 and the second housing 20. In some embodiments, one end of the first connector 52 can pass through the first sealing surface 11 and the second sealing surface 22 along the second direction y and be locked into the interior of the second end wall 23. One end of the first connector 52 can pass through the wall of the second housing 20 and the first sealing member 30 and be locked into the interior of the plug plate 15. The first connector 52 can be a connecting member with external threads, such as a bolt or screw. The first connector 52 can also be a connecting member such as a pin or rivet. For example, the first connector 52 is a bolt, the wall of the first housing 10 and the first sealing member 30 are respectively provided with through holes, the plug plate 15 is formed with threaded holes, and the bolt can pass through the through holes on the wall of the first housing 10 and the first sealing member 30 and be locked into the threaded hole of the plug plate 15. In some embodiments, the first connector 52 may not be locked into the plug plate 15, but may be locked into the extension wall panel 16. By providing the first connector 52 to connect the plug plate 15 and the frame 26, the connection stability between the plug plate 15 and the frame 26 can be improved, thereby improving the structural stability of the battery device 100 and making the battery device 100 have higher reliability.

[0265] In some embodiments, along the first direction x, the projection of the first connector 52 at least partially coincides with the projection of the battery cell 101. The first direction x is also the insertion direction along the plug plate 15. The first direction x can be a locking direction perpendicular to the first connector 52. "Along the first direction x, the projection of the first connector 52 at least partially coincides with the projection of the battery cell 101" can be understood as the first connector 52 being locked into the plug plate 15 to a greater depth, that is, the first connector 52 extends along the locking direction, for example, along the second direction y, and the projection of the portion extending into the plug plate 15 in the first direction x at least partially coincides with the projection of the battery cell 101 located in the receiving cavity 102. Along the first direction x, the projection of the first connector 52 at least partially overlaps with the projection of the battery cell 101, so that the plug plate 15 provides a deeper locking depth to the first connector 52, so that the first connector 52 can be firmly locked to the plug plate 15, improving the connection stability of the plug plate 15 and the second housing 20, and making the battery device 100 have higher reliability.

[0266] In the above scheme, by setting the width direction of the first sealing member 30 to be parallel to the first surface 21, for example, the width direction of the first sealing member 30 is parallel to the first direction x, the thickness of the first sealing member 30 occupies space in the second direction y while the first sealing member 30 plays a good sealing role, thereby improving the space utilization rate of the battery in the second direction y, and thus improving the volumetric energy density of the battery.

[0267] According to some embodiments of this application, please refer to Figure 26 The battery device 100 includes at least one battery pack 60, which includes a plurality of battery cells 101 arranged in a group. The battery pack 60 is provided with a binding member 70 for securing the plurality of battery cells 101 arranged in a group. The battery pack 60 may include a plurality of battery cells 101 arranged in a group, for example, the plurality of battery cells 101 may be stacked along the thickness direction of the battery cells 101. The battery pack 60 may be provided with the binding member 70 for securing the plurality of battery cells 101 arranged in a group, so that the plurality of battery cells 101 form a more stable structure.

[0268] In some embodiments, the binding member 70 may be a loop structure capable of being fitted around the periphery of a plurality of battery cells 101. In other embodiments, the binding member 70 may be a rope structure with its ends connected to bind the plurality of battery cells 101.

[0269] In some embodiments, the battery pack 60 may include an end plate 80, a strapping member 70, and a plurality of battery cells 101. The plurality of battery cells 101 are stacked along the thickness direction of the battery cells 101. Two end plates 80 are respectively provided at both ends of the plurality of battery cells 101. The strapping member 70 binds the two end walls and the plurality of battery cells 101 together.

[0270] In some embodiments, the battery device 100 has at least one battery pack 60, for example, a receiving cavity 102 within the battery device 100 may accommodate one or more battery packs 60. Multiple battery packs 60 may refer to two or more battery packs 60.

[0271] In the above scheme, multiple battery cells 101 arranged in groups in the battery pack 60 are bound by the binding member 70 so as to be arranged in an orderly manner in the receiving cavity 102, thereby improving the utilization rate of the receiving cavity 102 and thus improving the energy density of the battery device 100.

[0272] According to some embodiments of this application, please refer to Figure 27 The battery pack 60 includes a first battery pack 61 and a second battery pack 62 arranged adjacent to each other along a second direction y. The first battery pack 61 is provided with a first binding member 71, and the second battery pack 62 is provided with a second binding member 72. Along the second direction y, a first portion 710 of the first binding member 71 is provided on the side of the first battery pack 61 facing the second battery pack 62, and a second portion 720 of the second binding member 72 is provided on the side of the second battery pack 62 facing the first battery pack 61. The projections of the first portion 710 and the second portion 720 are misaligned along the second direction y, and at least partially overlap in a direction perpendicular to the first surface 21.

[0273] The battery device 100 includes a plurality of battery packs 60, which can be arranged in a second direction y. In some embodiments, along the second direction y, the projections of the strapping members 70 corresponding to each battery pack 60 can be staggered relative to each other, so that portions of the strapping members 70 between two adjacent battery packs 60 can be offset in the second direction y to reduce the space occupied by the strapping members 70 in the second direction y. In some embodiments, in a third direction z (along a direction perpendicular to the first surface 21), the projections of portions of the strapping members 70 between two adjacent battery packs 60 can at least partially overlap, that is, in the third direction z, portions of the strapping members 70 between two adjacent battery packs 60 can share a portion of space to reduce the space occupied by the strapping members 70 in the second direction y.

[0274] In some embodiments, the first battery pack 61 and the second battery pack 62 can be understood as two battery packs 60 that are adjacent in the second direction y among the plurality of battery packs 60 of the battery device 100. For example Figure 22 In this configuration, a first battery pack 61 and a second battery pack 62 are arranged in a second direction y. A first binding member 71 corresponding to the first battery pack 61 can bind multiple battery cells 101 of the first battery pack 61, and a second binding member 72 corresponding to the second battery pack 62 can bind multiple battery cells 101 of the second battery pack 62. A first portion 710 is a part of the first binding member 71, located in the second direction y between the multiple battery cells 101 of the first battery pack 61 and the second battery pack 62. A second portion 720 is a part of the second binding member 72, located in the second direction y between the multiple battery cells 101 of the second battery pack 62 and the first battery pack 61. In the second direction y, the projections of the first portion 710 and the second portion 720 are offset, but in the third direction z, the projections of the first portion 710 and the second portion 720 can coincide.

[0275] In the above solution, by misaligning the projection of the first part 710 along the second direction y and the projection of the second part 720 along the second direction y, and by at least partially overlapping the projection of the first part 710 along the first direction x and the projection of the second part 720 along the first direction x, the space occupied by the strapping member 70 in the second direction y can be effectively reduced, the utilization rate of the multiple battery packs 60 to the receiving cavity 102 can be improved, and the volumetric energy density of the battery device 100 can be improved.

[0276] According to some other embodiments of this application, please refer to Figure 28 There are multiple battery packs 60. The bundling member 70 includes an outer frame 73 and a partition strip 74. The partition strip 74 is disposed inside the outer frame 73 and divides the interior of the outer frame 73 into multiple sub-spaces, and each battery pack 60 is disposed in a sub-space.

[0277] The battery pack 60 may include a plurality of battery cells 101 arranged in a group, with the plurality of battery cells 101 stacked along the thickness direction of the battery cells 101. In the battery device 100, there may be a plurality of battery packs 60, such as two, three, four or five.

[0278] The strapping member 70 is used to secure multiple battery cells 101 arranged in a group. In some embodiments, the strapping member 70 is used to secure multiple battery cells 101 arranged in a group, that is, to secure multiple battery packs 60. Please refer to... Figure 28 The strapping piece 70 can secure three battery packs 60.

[0279] The strapping element 70 may include an outer frame 73 and a separator strip 74. Multiple battery packs 60 are arranged in an arrangement, for example... Figure 27 In this configuration, three battery packs 60 are arranged along the width direction of the individual battery cells 101, and an outer frame 73 is arranged along the outer periphery of the three battery packs 60. A partition strip 74 is disposed inside the outer frame 73 and connected to the inner wall of the outer frame 73, dividing the interior of the outer frame 73 into multiple sub-spaces. Figure 28 In the middle, there are two dividing strips 74. The two dividing strips 74 divide the interior of the outer frame 73 into three subspaces, and the three battery packs 60 are respectively set in the corresponding subspaces.

[0280] In some embodiments, the outer frame 73 and the partition strip 74 may be integrally formed. In some embodiments, the partition strip 74 may be connected to the outer frame 73 by means of bonding, welding or other connecting components.

[0281] In the above scheme, the strapping member 70 includes an outer frame 73 and a partition strip 74. The partition strip 74 divides the outer shell into multiple sub-spaces so that one strapping member 70 can strap multiple battery packs 60 at the same time, thereby reducing the occupancy of the strapping member 70 on the receiving cavity 102, so that the receiving cavity 102 can accommodate more battery cells 101, and the battery device 100 has a higher volumetric energy density.

[0282] According to some embodiments of this application, please refer to Figure 28 The battery pack 60 is a plurality of batteries arranged along the second direction y. The battery device 100 also includes an end plate 80, which is connected to the end face of the plurality of battery packs 60 in the first direction x, and a strapping member 70 is connected to the end plate 80.

[0283] In some embodiments, the battery pack 60 may include a plurality of battery cells 101 arranged in a group, the plurality of battery cells 101 being stacked along the thickness direction of the battery cells 101. In the battery device 100, the number of battery packs 60 is multiple, such as two, three, four, or five. The plurality of battery packs 60 may be arranged side-by-side, for example, side-by-side along a second direction y. In the stacking direction of the battery cells 101, the battery device 100 is provided with end plates 80, and two end plates 80 may be disposed at both ends of the plurality of battery packs 60 in the stacking direction.

[0284] In some embodiments, the dimension of the end wall in the side-by-side direction of the plurality of battery packs 60 may be greater than or equal to the dimension of the plurality of battery packs 60 in the side-by-side direction. This can be understood as the end wall being able to cover the plurality of battery packs 60 so as to secure the plurality of battery packs 60 together when the strapping member 70 is used.

[0285] Please refer to Figure 28The end plate 80 has a slot in its wall, and a portion of the strapping member 70 can be disposed in the slot. In some embodiments, each battery pack 60 corresponds to one strapping member 70, and a portion of the strapping member 70 can be disposed in the slot to bind the battery pack 60 to the end wall. In some embodiments, multiple battery packs 60 correspond to one strapping member 70, and a separator strip 74 in the strapping member 70 can be disposed in the slot to bind multiple battery packs 60 to the end wall.

[0286] In the above scheme, multiple battery packs 60 are arranged along the second direction y. An end plate 80 is provided at one end of the multiple battery packs 60 in the first direction x. The end plate 80 is connected to the end plate 80 by a strapping member 70, which can effectively integrate the multiple battery packs 60 into one unit, making the layout of the multiple battery packs 60 compact, improving the utilization rate of the housing cavity 102, and making the battery device 100 have a high volumetric energy density.

[0287] According to some embodiments of this application, please refer to Figure 29 The second housing 20 includes a second end wall 23 and a second side wall 24. A first surface 21 is located on the second end wall 23, and a first sealing surface 11 is located on the second side wall 24. The second side wall 24 is connected to the end of the second end wall 23 in the second direction y. The battery pack 60 includes a side battery pack 63 disposed adjacent to the second side wall 24 in the second direction y. The strapping member 70 includes a side portion 75, which is disposed on the side of the side battery pack 63 facing the second side wall 24 in the second direction y. The second side wall 24 is located on the side of the side portion 75 near the first surface 21.

[0288] The second end wall 23 can be a main part of the second housing 20, having a first surface 21 for carrying the battery device 100. In some embodiments, the first surface 21 is a surface of the second end wall 23 along a third direction z, and the first surface 21 is disposed towards the first housing 10. In some embodiments, the second end wall 23 can be a plate-like structure, and the first surface 21 is a surface of the second end wall 23 along a third direction z, for example, the first surface 21 is the upper surface of the second end wall 23, and the lower surface of the second end wall 23 is the surface away from the receiving cavity 102. In other embodiments, the lower surface of the first end wall 12 is defined as the surface of the second end wall 23 away from the receiving cavity 102, and the upper surface of the first end wall 12 is defined as the surface opposite to the lower surface of the first end wall 12. The first surface 21 can be a portion of the upper surface of the second end wall 23. For example, if the upper surface of the second end wall 23 has a groove, the first surface 21 can be the bottom surface of the groove; or, for example, if the upper surface of the second end wall 23 has a protrusion, the first surface 21 can be the surface of the protrusion.

[0289] In some embodiments, the battery device 100 may include a battery pack 60 disposed adjacent to the second sidewall 24. Alternatively, in some embodiments, the battery device 100 may include a plurality of battery packs 60, one of which is adjacent to the second sidewall 24 in the second direction y, and this battery pack 60 may be a side battery pack 60.

[0290] Multiple battery cells 101 in the sidewall battery pack 60 are secured by a strapping member 70, which has a side portion 75 located on the side of the multiple battery cells 101 facing the second sidewall 24. The phrase "the second sidewall 24 is located on the side of the side portion 75 near the first surface 21" can be understood as follows: in a third direction z, the second sidewall 24 is located below the side portion 75, or in other words, in the viewing direction along the first surface 21 pointing towards the first housing 10, the view passes first through the second sidewall 24 and then through the side portion 75.

[0291] In the above scheme, the side battery pack 63 is disposed adjacent to the second sidewall 24. In the direction perpendicular to the first surface 21, the side battery pack 63 can be constrained by the binding member 70 and the second sidewall 24 together, so that the side battery pack 63 is stably disposed in the receiving cavity 102. The second sidewall 24 is located on the side portion 75 near the first surface 21. It can also be understood that the size of the second sidewall 24 in the direction perpendicular to the first surface 21 can be made as small as possible so that the side battery pack 63 can be stably disposed in the receiving cavity 102 under the constraint of the binding member 70.

[0292] According to some embodiments of this application, please refer to Figure 29 Along the second direction y, the side portion 75 and the second sidewall 24 are offset, and when projected along a direction perpendicular to the first surface 21, the side portion 75 and the second sidewall 24 at least partially overlap.

[0293] In the above solution, the projection of the side portion 75 in the second direction y is offset from the projection of the second sidewall 24 in the second direction y, and the projection of the side portion 75 in the direction perpendicular to the first surface 21 is at least partially overlapped with the projection of the second sidewall 24 in the direction perpendicular to the first surface 21. This can effectively reduce the space occupied by the strapping member 70 in the second direction y, improve the utilization rate of the multiple battery packs 60 to the receiving cavity 102, and thus improve the volumetric energy density of the battery device 100.

[0294] According to some embodiments of this application, the battery cell 101 is a blade battery cell 101.

[0295] In some embodiments, the blade battery cell 101 can be a thinner, longer battery cell 101.

[0296] In some embodiments, a blade battery cell 101 may be accommodated in the receiving cavity 102 of the battery device 100 along the length direction of the blade battery cell 101.

[0297] In the above scheme, by setting the battery cell 101 in the battery device 100 as a blade battery cell 101, the volumetric energy density of the battery device 100 can be effectively improved.

[0298] According to some embodiments of this application, please refer to Figure 2 The vehicle 1000 is a truck. The vehicle body 1001 includes a cab 1002 and a cargo box 1003. The battery rack 1004 is located between the cab 1002 and the cargo box 1003. The second direction y is the direction from the cab 1002 to the cargo box 1003.

[0299] In the above scheme, the second direction y is the direction from the cab 1002 to the cargo compartment 1003. Therefore, after the vehicle 1000 is equipped with the battery device 100, the space between the cab 1002 and the cargo compartment 1003 can be used efficiently. By setting the first sealing interface 103 of the battery device 100 to intersect with the first surface 21, the overall space occupied by the battery device 100 along the second direction y can be reduced without affecting the sealing performance of the battery device 100. This allows the cargo compartment 1003 to occupy more space in the second direction y, thereby loading more cargo. Alternatively, the space saved along the second direction y can be used to install a battery device 100 with a higher energy density to improve the driving range of the vehicle 1000.

[0300] According to some embodiments of this application, please refer to Figure 3 The vehicle 1000 is a tractor unit. The vehicle body 1001 includes a cab 1002 and a towing seat 1005. The battery rack 1004 is located between the cab 1002 and the towing seat 1005. The second direction y is the direction from the cab 1002 toward the towing seat 1005.

[0301] In the above scheme, the second direction y is the direction from the cab 1002 towards the towing seat 1005. Therefore, after the vehicle 1000 is equipped with the battery device 100, the space between the cab 1002 and the towing seat 1005 can be used efficiently. By setting the first sealing interface 103 of the battery device 100 to intersect with the first surface 21, the overall space occupied by the battery device 100 along the second direction y can be reduced without affecting the sealing performance of the battery device 100. This allows the towing seat 1005 to be positioned closer to the cab 1002, so that more space of the vehicle body 1001 in the second direction y can be used to mount the cargo box 1003, thereby loading more cargo; or, the space saved along the second direction y can be used to install a battery device 100 with a higher energy density to improve the range of the vehicle 1000.

[0302] According to some embodiments of this application, please refer to Figures 4-7 The battery rack 1004 includes a plurality of battery compartments 10041 arranged along the direction of gravity. A plurality of battery devices 100 correspond one-to-one with the plurality of battery compartments 10041, and each battery device 100 is housed in its corresponding battery compartment 10041.

[0303] The battery compartment 10041 can be an openable, enclosed space; for example, the battery compartment 10041 may include a compartment body and a door. The battery compartment 10041 can also be a space with an opening; for example, please refer to... Figure 6 and Figure 7 The battery compartment 10041 can be a space enclosed by multiple beams.

[0304] In some embodiments, the battery rack 1004 includes a main body 10042, which includes multiple battery compartments 10041. Before mounting the lowest electrical device, the main body 10042 can be suspended, for example, by raising the battery rack 1004 using a hoisting device. Alternatively, the electrical device can be mounted on a pre-set elevation fixture. The elevation fixture allows the main body 10042 to be suspended, reserving space for the mounting operation.

[0305] In the above scheme, since multiple battery devices 100 correspond one-to-one with multiple battery compartments 10041, the assembly process of the battery devices 100 is simpler and the assembly difficulty is relatively low. The risk of damage from collisions between different battery devices 100 is also relatively low, and the reliability of the battery devices 100 is high.

[0306] According to some embodiments of this application, please refer to Figure 4 and Figure 7The battery rack 1004 includes a main body 10042 and a support leg 10043. The main body 10042 includes multiple battery compartments 10041. The support leg 10043 is located at the bottom of the main body 10042 and is used to support the main body 10042.

[0307] After the electrical device is installed into the vehicle body 1001, the support leg 10043 will be fixed to the vehicle body 1001.

[0308] In the above scheme, the support leg 10043 can facilitate the mounting of the battery device 100 in the battery compartment 10041 at the lowest point along the direction of gravity, which is beneficial to improving the assembly efficiency of the battery device 100.

[0309] According to some embodiments of this application, please refer to Figures 5-7 The battery rack 1004 includes a plurality of first supports 10044 stacked along the direction of gravity. The plurality of first supports 10044 correspond one-to-one with a plurality of battery devices 100. Each first support 10044 has a battery compartment 10041. Each battery device 100 is mounted on the corresponding first support 10044 and housed in the battery compartment 10041 of the first support 10044.

[0310] In some embodiments, two adjacent first supports 10044 can be stacked and connected together by welding or other means.

[0311] In some embodiments, the first support 10044 is composed of multiple rectangular tubes spliced ​​together.

[0312] In some embodiments, the first support 10044 includes a support portion and an enclosure portion. The support portion carries the battery device 100, and the enclosure portion surrounds the support portion. The enclosure portion and the support portion together define the battery compartment 10041. In some embodiments, the first support 10044 further includes a cover portion, which is disposed opposite to the support portion along the direction of gravity. The enclosure portion connects the cover portion and the support portion, and the enclosure portion may have an opening in a direction perpendicular to the direction of gravity for the battery device 100 to be inserted into the battery compartment 10041. Of course, in some other embodiments, the upper end of the enclosure portion may also be closed to form a first opening 10047 for the battery device 100 to enter the battery compartment 10041.

[0313] In the above scheme, after the battery device 100 is installed in the corresponding first bracket 10044 and mounted, multiple first brackets 10044 can be stacked to form a battery rack 1004. The mounting operation of the battery device 100 will not be interfered with by the other battery devices 100. On the one hand, it is beneficial to increase the proportion of space occupied by the battery device 100 in the battery compartment 10041, thereby enabling the battery device 100 mounted on the vehicle 1000 to have a higher energy density. On the other hand, it is beneficial to provide more operating space for the mounting operation, thereby reducing the assembly difficulty of the battery device 100.

[0314] According to some embodiments of this application, please refer to Figures 5-7 The two adjacent first supports 10044 are detachably connected.

[0315] In some embodiments, two adjacent first brackets 10044 may be connected by fasteners.

[0316] In some embodiments, two adjacent first brackets 10044 can be connected by snap-fit.

[0317] The above solution can further reduce the assembly difficulty of the battery rack 1004 and the battery device 100, and at the same time, it can also reduce the maintenance difficulty of the battery device 100.

[0318] According to some embodiments of this application, please refer to Figures 5-7 The two adjacent first supports 10044 are inserted and fitted together along the direction of gravity.

[0319] In some embodiments, two adjacent first supports 10044 can be connected by a protrusion-contact structure. For example, one of the two adjacent first supports 10044 is provided with a protrusion, and the other is provided with a groove, with the protrusion and groove engaging in a plug-in connection.

[0320] In the above scheme, the lower first bracket 10044 can serve as the assembly reference for the adjacent upper first bracket 10044, which reduces the assembly difficulty of the first bracket 10044.

[0321] According to some embodiments of this application, please refer to Figures 5-7 The upper edge of the first bracket 10044 is provided with a plurality of limiting parts 10045 at intervals, and the plurality of limiting parts 10045 surround to form an insertion port 10046. In two adjacent first brackets 10044, the lower end of the upper first bracket 10044 is inserted into the insertion port 10046 of the lower first bracket 10044.

[0322] Figure 6 The dashed line in the figure shows the outline of socket 10046.

[0323] The first bracket 10044 can serve as a structure that mates with multiple limiting parts 10045. For example, please refer to... Figure 6 The bottom frame of the first bracket 10044 can be inserted through the socket 10046 of the first bracket 10044 below it and stacked on top of the first bracket 10044 below it.

[0324] In some embodiments, two adjacent first brackets 10044 can be fastened to the side of the limiting portion 10045 away from the battery compartment 10041 by fasteners.

[0325] In the above scheme, the socket 10046 of the lower first bracket 10044 can be used as the assembly reference of the upper first bracket 10044, and after the first bracket 10044 is assembled, the limiting part 10045 can limit the upper first bracket 10044 to improve the connection stability between two adjacent first brackets 10044.

[0326] According to some embodiments of this application, please refer to Figures 5-7 The upper end of the first bracket 10044 has a first opening 10047, which is used to allow the battery device 100 to enter the battery compartment 10041.

[0327] The first opening 10047 allows the battery device 100 to be hoisted into the battery compartment 10041.

[0328] In the above scheme, the setting of the first opening 10047 allows the battery device 100 to be installed into the first bracket 10044 from top to bottom. For example, the battery device 100 can be assembled by means of hoisting, which helps to reduce the assembly difficulty of the battery device 100.

[0329] According to some embodiments of this application, please refer to Figures 5-7 The battery rack 1004 also includes a second bracket 10048, which is stacked above a plurality of first brackets 10044, and the second bracket 10048 has a control compartment 10049. The vehicle 1000 also includes a control module 1006, which is electrically connected to a plurality of battery devices 100 and is housed within the control compartment 10049.

[0330] In some embodiments, a connector is provided on the outside of the housing 1 of the battery device 100, and the control module 1006 can be electrically connected to the battery device 100 through the connector so that the control module 1006 can perform electrical control on the battery device 100.

[0331] In the above scheme, since the mounting part 90 is located at the bottom of the box 1 and the second bracket 10048 is stacked on top of multiple first brackets 10044, the assembly of the control module 1006 will not interfere with the mounting part 90, thus reducing the assembly difficulty of the control module 1006.

[0332] According to some embodiments of this application, please refer to Figure 30 This application provides a method for assembling a battery device 100. In some embodiments, the method for assembling the battery device 100 includes the following steps:

[0333] S101. Provide a battery rack 1004, which includes first to nth battery compartments 10041 arranged sequentially from top to bottom along the direction of gravity, where n is greater than or equal to 2.

[0334] S102. Provide n battery devices 100. Each battery device 100 includes a battery cell 101 and a housing 1. The housing 1 has a receiving cavity 102 for accommodating the battery cell 101. A mounting part 90 is provided at the bottom of the housing 1. In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting part 90 falls into the orthographic projection of the receiving cavity 102.

[0335] S103. Install n battery devices 100 sequentially from top to bottom into battery compartments 10041 to the nth battery compartment 10041. Before installing the next battery device 100, hang the installed battery devices 100 on the battery rack 1004.

[0336] Since the battery devices 100 are installed into the battery compartment 10041 sequentially from top to bottom, there is a large operating space for mounting the battery devices 100 and the battery rack 1004. For example, after the first battery device 100 is installed into the first battery compartment 10041, since the second battery device 100 has not yet been assembled, most of the space in the second battery compartment 10041 can be provided for equipment or operators to perform mounting operations.

[0337] In the above scheme, since the mounting operation occurs before the next battery device 100 is installed, the lower battery device 100 does not restrict the space for the mounting operation, thus reducing the difficulty of mounting the battery device 100. This also means that the distance between two adjacent battery devices 100 can be designed to be relatively small. After multiple battery devices 100 are installed in the battery rack 1004, the space of the battery rack 1004 can be fully utilized. Consequently, after the battery rack 1004 and the battery devices 100 are installed in the vehicle 1000, the battery devices 100 mounted on the vehicle 1000 can have a higher energy density, increasing the driving range of the vehicle 1000.

[0338] According to some embodiments of this application, please refer to Figure 30 and Figure 31In some embodiments, the assembly method of the battery device 100 further includes the following steps:

[0339] S104. Before inserting the battery device 100 into the nth battery compartment 10041, the battery rack 1004 is suspended.

[0340] Before installing the battery device 100 into the nth battery compartment 10041, the battery rack 1004 is left empty. This means that the battery rack 1004 can be left empty after the battery device 100 is installed into the (n-1)th battery compartment 10041, or it can be left empty before the battery device 100 is installed into the first battery compartment 10041.

[0341] The overhead battery rack 1004 can be achieved by the support legs 10043 set at the bottom of the battery rack 1004, or by hoisting equipment or shims.

[0342] In the above scheme, raising the battery rack 1004 can provide sufficient space for the mounting operation of the battery device 100 in the nth battery compartment 10041, reducing the assembly difficulty of the battery device 100.

[0343] According to some embodiments of this application, please refer to Figure 32 This application provides a method for assembling a battery device 100. In some embodiments, the method for assembling the battery device 100 includes the following steps:

[0344] S201. Provide a plurality of first brackets 10044, each first bracket 10044 having a battery compartment 10041;

[0345] S202. Provide multiple battery devices 100. Each battery device 100 includes a battery cell 101 and a housing 1. The housing 1 has a receiving cavity 102 for accommodating the battery cell 101. A mounting part 90 is provided at the bottom of the housing 1. In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting part 90 falls into the orthographic projection of the receiving cavity 102.

[0346] S203. The battery devices 100 are inserted one-to-one into the battery compartments 10041 of the multiple first brackets 10044, and the battery devices 100 are mounted on the first brackets 10044.

[0347] When mounting the battery device 100 on the first bracket 10044, the first bracket 10044 can be suspended in the air. The first bracket 10044 can be suspended in the air by hoisting equipment or shims.

[0348] S204. Stack multiple first brackets 10044 with battery devices 100 mounted on them along the direction of gravity, and lock two adjacent first brackets 10044 together.

[0349] The locking of two adjacent first brackets 10044 can be achieved by fasteners or snap-fit ​​structures.

[0350] In the above scheme, multiple first brackets 10044 are stacked along the direction of gravity only after the battery device 100 is mounted. This means that the mounting operation of the battery device 100 will not be interfered with by the other battery devices 100. On the one hand, this is conducive to increasing the proportion of space occupied by the battery device 100 in the battery compartment 10041, thereby enabling the battery device 100 mounted on the vehicle 1000 to have a higher energy density. On the other hand, it is conducive to providing more operating space for the mounting operation, thereby reducing the assembly difficulty of the battery device 100.

[0351] According to some embodiments of this application, please refer to Figure 32 In some embodiments, the assembly method of the battery device 100 further includes the following steps:

[0352] S205. Provide a second bracket 10048 and a control module 1006, and mount the control module 1006 on the second bracket 10048.

[0353] The control module 1006 can be mounted on the second bracket 10048 via fasteners or snap-fit ​​structures.

[0354] S206. The second bracket 10048, on which the control module 1006 is mounted, is stacked on top of the first bracket 10044, and the second bracket 10048 is locked to the first bracket 10044.

[0355] The second support 10048 and the first support 10044 may have the same or different structures.

[0356] In some embodiments, the second bracket 10048 and the first bracket 10044 can be locked together by fasteners.

[0357] In the above solution, since the mounting part 90 is located at the bottom of the housing 1 and the second bracket 10048 is stacked on top of multiple first brackets 10044, the assembly of the control module 1006 will not interfere with the mounting part 90, reducing the assembly difficulty of the control module 1006. Simultaneously, the control module 1006 and the battery device 100 can be arranged along the direction of gravity, reducing the difficulty of electrical connection between the control module 1006 and the battery device 100.

[0358] According to some embodiments of this application, please refer to Figure 32 In some embodiments, the assembly method of the battery device 100 further includes the following steps:

[0359] S207. The second bracket 10048 and multiple first brackets 10044, which are integrated with the lock, are installed on the vehicle body 1001.

[0360] The first bracket 10044 can be hung on the outside of the driver's cabin of the vehicle body 1001. Of course, the first bracket 10044 can also be directly installed on the surface of the vehicle body 1001 along the direction of gravity.

[0361] In the above scheme, the battery device 100 is assembled by stacking the first bracket 10044, which allows more space in the battery compartment 10041 along the direction of gravity to be used to arrange the battery device 100. After the battery rack 1004 and the electrical device are mounted on the vehicle body 1001, the energy density of the electrical device mounted on the vehicle 1000 can be significantly improved, thereby increasing the driving range of the vehicle 1000.

[0362] According to some embodiments of this application, please refer to Figures 1-15 This application provides a vehicle 1000, which includes a vehicle body 1001, a battery rack 1004, and multiple battery devices 100. The battery rack 1004 is disposed on the vehicle body 1001. Each battery device 100 includes a battery cell 101 and a housing 1. The housing 1 has a receiving cavity 102 for accommodating the battery cell 101. A mounting portion 90 is provided at the bottom of the housing 1. In the same projection plane perpendicular to the direction of gravity, the orthographic projection of the mounting portion 90 falls within the orthographic projection of the receiving cavity 102. The mounting portion 90 is used to mount the battery device 100 to the battery rack 1004. The multiple battery devices 100 are spaced apart along the direction of gravity, and the distance between two adjacent battery devices 100 is H1, satisfying: 10mm ≤ H1 ≤ 120mm.

[0363] The housing 1 includes a first housing 10 and a second housing 20. The first housing 10 includes a first sealing surface 11, and the second housing 20 includes a first surface 21 and a second sealing surface 22. The first surface 21 is used to support the battery cell 101, and the second sealing surface 22 is located on one side of the second housing 20 in a second direction y, which is perpendicular to the direction of gravity. The first sealing surface 11 and the second sealing surface 22 cooperate to form a first sealing interface 103 for sealing the receiving cavity 102. The first sealing interface 103 intersects with the first surface 21. The first sealing interface 103 is perpendicular to the first surface 21 and parallel to the direction of gravity.

[0364] The first housing 10 includes two first sidewalls 13 arranged opposite each other along the second direction y. The battery compartment 10041 has two first compartment walls arranged opposite each other along the second direction y. Along the second direction y, the minimum distance between the first sidewall 13 and the first compartment wall is H2, which satisfies: 10mm≤H2≤50mm.

[0365] The second housing 20 includes a second end wall 23, a first surface 21 located on the second end wall 23, and a mounting part 90 disposed on the second end wall 23.

[0366] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vehicle, characterized in that, include: Vehicle body; A battery rack is mounted on the vehicle body; Multiple battery devices, each battery device including a battery cell and a housing, the housing having a receiving cavity for accommodating the battery cell, and a mounting part provided at the bottom of the housing, the orthographic projection of the mounting part falling into the orthographic projection of the receiving cavity in the same projection plane perpendicular to the direction of gravity, the mounting part being used to mount the battery device to the battery rack. The battery devices are arranged at intervals along the direction of gravity, and the distance between two adjacent battery devices is H1, which satisfies: 10mm≤H1≤120mm.

2. The vehicle according to claim 1, characterized in that, 10mm≤H1≤50mm.

3. The vehicle according to claim 1, characterized in that, The housing includes a first housing and a second housing. The first housing includes a first sealing surface, and the second housing includes a first surface and a second sealing surface. The first surface is used to support the battery cell, and the second sealing surface is located on one side of the second housing in a second direction, which is perpendicular to the direction of gravity. The first sealing surface and the second sealing surface cooperate to form a first sealing interface for sealing the receiving cavity, and the first sealing interface intersects with the first surface.

4. The vehicle according to claim 3, characterized in that, The first sealing interface is perpendicular to the first surface.

5. The vehicle according to claim 3, characterized in that, The first sealing interface is parallel to the direction of gravity.

6. The vehicle according to claim 3, characterized in that, The first housing includes two first sidewalls disposed opposite each other along a second direction; The battery rack includes multiple battery compartments arranged along the direction of gravity, with each of the multiple battery devices corresponding to one of the multiple battery compartments, and each battery compartment having two first compartment walls arranged opposite to each other along a second direction; Along the second direction, the minimum distance between the first sidewall and the first compartment wall is H2, which satisfies: 10mm≤H2≤50mm.

7. The vehicle according to claim 3, characterized in that, A first sealing element is provided between the first sealing surface and the second sealing surface, and the first sealing element is located on the side of the first sealing surface and the second sealing surface that is far from the receiving cavity, closer to the receiving cavity.

8. The vehicle according to claim 7, characterized in that, Along the width direction of the first seal, one end of the first seal is close to the receiving cavity, the other end of the first seal is close to the outside of the battery, and the width direction of the first seal intersects with the first surface.

9. The vehicle according to claim 7, characterized in that, The second housing includes a second end wall and a second side wall. The first surface is located on the second end wall. At least a portion of the second sealing surface is disposed on the second side wall. The second side wall is connected to the end of the second end wall in the second direction. In the same projection plane perpendicular to the second direction, at least a portion of the orthographic projection of the second side wall is located on the side of the orthographic projection of the first surface closer to the battery cell.

10. The vehicle according to claim 7, characterized in that, The second housing includes a second end wall, the first surface is located on the second end wall, and the second sealing surface is the side wall surface of the second end wall perpendicular to the second direction.

11. The vehicle according to claim 10, characterized in that, The first housing includes a first end wall and a first side wall connected to each other. The first end wall includes a first end wall surface disposed opposite to the first surface. At least a portion of the first sealing surface is disposed on the first side wall, and at least a portion of the first side wall is located on the side of the first end wall surface close to the first surface.

12. The vehicle according to claim 11, characterized in that, At least a portion of the first sidewall is located on the side of the first surface away from the battery cell.

13. The vehicle according to claim 11, characterized in that, The second housing also includes a third sidewall, which is disposed at the end of the second end wall in the first direction. The third sidewall extends toward and connects to the first housing, and the first direction, the second direction, and the gravity direction are perpendicular to each other.

14. The vehicle according to claim 13, characterized in that, The third sidewall includes a first flat surface opposite to the first surface and a second flat surface intersecting the second direction. The first flat surface is used for a sealing connection with the first end wall, and the second flat surface is used for a sealing connection with the first sidewall.

15. The vehicle according to claim 14, characterized in that, The battery also includes a second seal, which is disposed between the third sidewall and the first housing.

16. The vehicle according to claim 15, characterized in that, The first flat surface and the second flat surface are connected by a transition surface, which includes a slope and / or an arc surface. A mating surface is formed at the connection between the first end wall and the first side wall, and the mating surface is provided corresponding to the transition surface.

17. The vehicle according to claim 16, characterized in that, The second sealing element includes a first sub-sealing element, a second sub-sealing element, and a third sub-sealing element. The first sub-sealing element is disposed between the first flat surface and the first end wall, the second sub-sealing element is disposed between the second flat surface and the first side wall, and the third sub-sealing element is disposed between the transition surface and the mating surface.

18. The vehicle according to claim 9, characterized in that, The battery also includes a first fastener, which passes through the first sealing interface along the second direction and is locked into the interior of the second end wall.

19. The vehicle according to claim 18, characterized in that, The second housing also includes a third sidewall, which is disposed at the end of the second end wall in the first direction. The battery also includes a second fastener, which is used to connect the third sidewall and the first housing. The second fastener is locked into the interior of the third sidewall. The first direction, the second direction and the gravity direction are perpendicular to each other.

20. The vehicle according to claim 19, characterized in that, Within the same projection plane perpendicular to the first direction, the orthographic projection of the second fastener does not overlap with the orthographic projection of the mounting portion.

21. The vehicle according to claim 3, characterized in that, A first sealing element is provided between the first sealing surface and the second sealing surface. Along the width direction of the first sealing element, one end of the first sealing element is close to the receiving cavity, and the other end of the first sealing element is close to the outside of the battery. The width direction of the first sealing element is parallel to the first surface.

22. The vehicle according to claim 3, characterized in that, The vehicle is a truck, and the vehicle body includes a cab and a cargo box. The battery rack is disposed between the cab and the cargo box, and the second direction is the direction from the cab to the cargo box.

23. The vehicle according to claim 3, characterized in that, The vehicle is a tractor unit, the vehicle body includes a cab and a towing seat, the battery rack is disposed between the cab and the towing seat, and the second direction is the direction from the cab to the towing seat.

24. The vehicle according to claim 1, characterized in that, The battery rack includes multiple battery compartments arranged along the direction of gravity, with multiple battery devices corresponding one-to-one with the multiple battery compartments, and each battery device is housed in its corresponding battery compartment.

25. The vehicle according to claim 24, characterized in that, The battery rack also includes: The main body includes multiple battery compartments; A support leg is provided at the bottom of the main body and is used to support the main body.

26. The vehicle according to claim 24, characterized in that, The battery rack includes a plurality of first supports stacked along the direction of gravity, each of the plurality of first supports corresponding to a plurality of battery devices, each of the first supports having a battery compartment, and each battery device being mounted on the corresponding first support and housed within the battery compartment of the first support.

27. The vehicle according to claim 26, characterized in that, The two adjacent first brackets are detachably connected.

28. The vehicle according to claim 26, characterized in that, The two adjacent first brackets are inserted and fitted together along the direction of gravity.

29. The vehicle according to claim 28, characterized in that, The upper edge of the first bracket is provided with multiple limiting parts at intervals, and the multiple limiting parts surround to form an insertion port; In two adjacent first brackets, the lower end of the upper first bracket is inserted into the socket of the lower first bracket.

30. The vehicle according to claim 26, characterized in that, The upper end of the first bracket has a first opening for the battery device to enter the battery compartment.

31. The vehicle according to claim 26, characterized in that, The battery rack also includes a second support, which is stacked on top of a plurality of the first supports, and the second support has a control compartment; The vehicle also includes a control module electrically connected to the plurality of battery devices, and the control module is housed within the control compartment.

Images