Battery and electric device

Abstract

The utility model discloses a battery and an electric device. The battery comprises a battery monomer, a first box body and a second box body, the first box body comprises a first sealing face. The second box body comprises a first surface and a second sealing surface, the first surface is used for bearing the single battery, the first box body and the second box body jointly define a closed space for accommodating the single battery, and the first sealing surface and the second sealing surface are matched to form a first sealing interface for sealing the closed space. The first sealing interface intersects the first surface. The technical scheme can improve the energy density of the battery.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to PCT patent application PCT / CN2022 / 144191 entitled “Battery and Electrical Device” filed on December 30, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0004] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0005] In the development of battery technology, how to improve the energy density of batteries is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The present application provides a battery and an electrical device, which can improve the energy density of the battery.

[0007] This application is achieved through the following technical solutions:

[0008] In a first aspect, the present application provides a battery, the battery comprising a battery cell, a first box and a second box. The first box comprises a first sealing surface. The second box comprises a first surface and a second sealing surface, the first surface is used to carry the battery cell, the first box and the second box are together enclosed to form a closed space for accommodating the battery cell, the first sealing surface cooperates with the second sealing surface to form a first sealing interface for sealing the closed space. The first sealing interface intersects with the first surface.

[0009] In the above scheme, by setting the first sealing interface to intersect with the first surface, that is, the first sealing interface is not parallel to the first surface, the projection area of ​​the first seal on the first surface can be reduced, and the space occupied by the first sealing interface in the direction parallel to the first surface can be reduced, thereby improving the space utilization of the battery in the direction parallel to the first surface to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.

[0010] According to some embodiments of the present application, the first sealing surface and the second sealing surface are parallel to the first direction, and the first sealing surface and the second sealing surface intersect with the second direction, and the first direction and the second direction are both parallel to the first surface.

[0011] In the above scheme, the first sealing surface and the second sealing surface intersect with the second direction, that is, the first sealing interface is arranged to intersect with the second direction. By setting the first sealing interface to intersect with the second direction, the projection area of ​​the first sealing interface on the first surface can be reduced, and the space occupied by the first sealing interface in the second direction can be reduced, thereby improving the space utilization of the battery in the second direction, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery. For example, by setting the first sealing interface to be perpendicular to the second direction, the sealed connection between the first box body and the second box body can be achieved without setting a flange structure protruding along the second direction, thereby improving the space utilization of the battery in the second direction, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.

[0012] According to some embodiments of the present application, a first sealing member is disposed between the first sealing surface and the second sealing surface, and the first sealing member is located on a side of the first sealing surface or the second sealing surface that is away from the closed space and close to the closed space.

[0013] In the above scheme, by providing a first sealing member between the first sealing surface and the second sealing surface, the sealing between the first sealing surface and the second sealing surface can be effectively improved, reducing the risk of external substances entering the closed space and causing damage to the battery cell, thereby improving the reliability of the battery.

[0014] According to some embodiments of the present application, along the width direction of the first seal, one end of the first seal is close to the closed space, 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.

[0015] 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, so that under the condition that the first seal plays a good sealing role, the projection 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 is reduced, thereby improving the space utilization of the battery in the direction parallel to the first surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.

[0016] According to some embodiments of the present application, the second box body 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 an end portion of the second end wall in a second direction, and projected along the second direction, the projection of the second side wall is at least partially located on a side of the first surface close to the battery cell.

[0017] In the above scheme, the second box body includes a second end wall and a second side wall, the second end wall has a first surface to be able to carry the battery, and 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 larger to meet the width setting requirement of the first seal. On the basis of meeting the setting requirement of the first seal, the second box body can be set to be lighter or reduce the cost.

[0018] According to some embodiments of the present application, along the second direction, a projection of the first sealing member is at least partially located on a side of the first surface close to the battery cell.

[0019] In the above solution, the second direction may be the arrangement direction of the first sealing surface and the second sealing surface, or the second direction may be the thickness direction of the first sealing surface. The projection of the first sealing member in the second direction is at least partially located on the side of the first surface close to the battery cell, so that the first sealing member can have a smaller size in the second direction as much as possible while having a larger width, so as to improve the sealing between the first sealing surface and the second sealing surface without increasing the space occupancy in the second direction as much as possible, so that the battery has higher reliability.

[0020] According to some embodiments of the present application, along the second direction, a projection of the first sealing member and a projection of the battery cell at least partially overlap.

[0021] In the above scheme, the projection of the first seal in the second direction at least partially overlaps with the projection of the battery cell, and at least part of the first seal can be arranged in the space covered by the projection of the battery cell along the second direction, so that the first seal has a smaller size along the second direction and has a sealing width as large as possible, so as to effectively improve the sealing between the first sealing surface and the second sealing surface, so that the battery has higher reliability.

[0022] According to some embodiments of the present application, the second box body includes a second end wall, the first surface is located on the second end wall, and the second sealing surface is a side wall surface of the second end wall perpendicular to the second direction.

[0023] In the above scheme, the second box body has a simple structure. On the one hand, the second end wall of the second box body serves as a component for carrying the battery cell. On the other hand, the second end wall of the second box body also has a second sealing surface to be connected to the first sealing surface of the first box body. Therefore, the second box body can be set to a simpler structure and meet the sealing requirements of the first sealing surface and the second sealing surface, thereby reducing the processing cost of the second box body.

[0024] According to some embodiments of the present application, the first box body includes a first end wall and a first side wall connected to each other, the first end wall includes a first end wall surface arranged opposite to the first surface, at least a portion of the first sealing surface is arranged on the first side wall, and at least a portion of the first side wall is located on a side of the first end wall surface close to the first surface.

[0025] In the above scheme, the first box body has a simple structure and is easy to manufacture. The first box body includes a first end wall and a first side wall 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 surface close to the first surface, on the one hand, the first box body and the second box body can be enclosed to form a closed space for accommodating battery cells. 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 between the first sealing surface and the second sealing surface, so that the battery has higher reliability.

[0026] According to some embodiments of the present application, at least a portion of the first side wall is located on a side of the first surface away from the battery cell.

[0027] In the above scheme, at least part of the first side wall is located on the side of the first surface away from the battery cell, which can also be understood as at least part of the first sealing surface is located on the side of the first surface away from the battery cell. On the one hand, the area of ​​the first sealing surface can be made as large as possible to form better connection stability and sealing with the second sealing surface; on the other hand, when the first sealing surface and the second sealing surface are connected to each other through other connecting parts, because the first surface is the surface of the second end wall, the second end wall can provide the connecting part with a larger connection dimension along the second direction, so as to improve the locking strength of the connecting part to the first sealing surface and the second sealing surface, reduce the risk of the first sealing surface and the second sealing surface being detached from each other, and make the battery have higher reliability.

[0028] According to some embodiments of the present application, the second box body further includes a third side wall, which is disposed at an end of the second end wall in the first direction, and the third side wall extends toward the first box body and is connected to the first box body.

[0029] In the above solution, by providing a third side wall at the end of the second end wall in the first direction, the second end wall can be connected to the first box body through the third side wall in the first direction, thereby improving the connection stability between the first box body and the second box body, and further improving the reliability of the battery.

[0030] According to some embodiments of the present application, the third side wall includes a first flat surface facing away from the first surface and a second flat surface intersecting the second direction, the first flat surface is used for sealing connection with the first end wall, and the second flat surface is used for sealing connection with the first side wall.

[0031] In the above solution, the third side wall is connected to the first box body through the first flat surface and the second flat surface, which can effectively improve the connection stability and sealing of the first box body and the second box body, so that the battery has higher reliability. Among them, the second flat surface is arranged to intersect with the second direction, and the second flat surface is used to be sealed and connected with the first side wall, so it can effectively improve the space utilization of the battery in the second direction, so that more battery cells can be accommodated or the volume of the battery can be reduced, thereby improving the volume energy density of the battery.

[0032] According to some embodiments of the present application, the battery further includes a second seal, which is disposed between the third side wall and the first box body.

[0033] In the above solution, by providing the second sealing member between the third side wall and the first box body, the sealing performance between the third side wall and the first box body can be effectively improved, so that the battery has higher reliability.

[0034] According to some embodiments of the present application, the first flat surface and the second flat surface are connected by a transition surface, the transition surface includes an inclined surface and / or an arcuate surface, and a mating surface is formed at the connection between the first end wall and the first side wall, and the mating surface is arranged corresponding to the transition surface.

[0035] In the above scheme, a transition surface is provided to enable a smooth transition between the first flat surface and the second flat surface. On the one hand, this facilitates the second seal to be closely attached to the surface where the third side wall and the first box body are interconnected. On the other hand, it reduces the risk of sealing failure caused by damage to the second seal due to interference between the edges and corners of the first flat surface and the second flat surface, thereby making the battery more reliable.

[0036] According to some embodiments of the present application, the second seal includes a first sub-seal, a second sub-seal and a third sub-seal, the first sub-seal is arranged between the first flat surface and the first end wall, the second sub-seal is arranged between the second flat surface and the first side wall, and the third sub-seal is arranged between the transition surface and the mating surface.

[0037] In the above scheme, by setting the second seal as the first sub-seal, the second sub-seal and the third sub-seal, and respectively setting the first sub-seal, the second sub-seal and the third sub-seal 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 and the first box body are interconnected, thereby improving the sealing between the first box body and the second box body, thereby making the battery have higher reliability.

[0038] According to some embodiments of the present application, the battery further includes a first fastener, which penetrates the first sealing interface along the second direction and is locked into the interior of the second end wall.

[0039] In the above scheme, by arranging the first fastener to pass through the first sealing interface and lock into the interior of the second end wall, the connection stability between the first box body and the second box body can be effectively improved, thereby improving the structural stability of the battery and making the battery have higher reliability.

[0040] According to some embodiments of the present application, the portion of the first fastener locked into the second end wall is located on a side of the first surface away from the enclosed space.

[0041] In the above scheme, by setting the part of the first fastener that is locked into the second end wall to be located on the side of the first surface away from the enclosed space, on the one hand, the first fastener does not occupy the enclosed space, which can improve the utilization rate of the enclosed space, improve the volume energy density of the battery, and reduce the risk of interference with the battery cell by the first fastener; on the other hand, the second end wall can provide a deeper locking depth for the first fastener, so that the first fastener can be firmly locked to the second end wall, thereby improving the connection stability between the first box body and the second box body, and making the battery have higher reliability.

[0042] According to some embodiments of the present application, along a direction perpendicular to the first surface, a projection of the first fastener at least partially overlaps with a projection of the battery cell.

[0043] In the above scheme, when projected in a direction perpendicular to the first surface, the projection of the first fastener at least partially overlaps with the projection of the battery cell, so that the second end wall provides a deeper locking depth for the first fastener, so that the first fastener can be firmly locked to the second end wall, thereby improving the connection stability between the first box body and the second box body, and making the battery have higher reliability.

[0044] According to some embodiments of the present application, the second box body also includes a third side wall, which is arranged 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 side wall and the first box body, and the second fastener is locked into the interior of the third side wall.

[0045] In the above scheme, by arranging a third side wall at the end of the second end wall in the first direction, and connecting the third side wall and the first box body through a second locking member, a stable connection relationship can be established between the third side wall and the first box body, thereby improving the connection stability between the first box body and the second box body, and further improving the reliability of the battery.

[0046] According to some embodiments of the present application, a first seal is arranged between the first sealing surface and the second sealing surface. Along the width direction of the first seal, one end of the first seal is close to the enclosed space, and the other end of the first seal is close to the outside of the battery. The width direction of the first seal is parallel to the first surface.

[0047] 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 is parallel to the first direction, so as to reduce the space occupied by the thickness of the first seal in the second direction under the condition that the first seal plays a good sealing role, the space utilization of the battery in the second direction is improved to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.

[0048] According to some embodiments of the present application, the second box body includes a surrounding frame, the surrounding frame is formed with an opening along a first direction, and the first box body includes a plugging plate, the plugging plate is at least partially inserted into the interior of the surrounding frame along the first direction and closes the opening.

[0049] In the above solution, the second box body may include a frame, and the frame may be formed with an opening at the end in the first direction, and the battery cell may be placed in the frame through the opening. The first box body may include a plug plate, and the plug plate may be plugged into the interior of the frame along the first direction to close the opening, so that no additional space is occupied in the second direction, that is, the maximum size of the outer contour of the battery may be the maximum size of the outer contour of the frame, so that the battery has a higher space utilization rate to accommodate more battery cells or a smaller volume, so that the battery has a higher volume energy density.

[0050] According to some embodiments of the present application, the first box body further includes an extended wall plate, at least a portion of the first sealing surface is disposed on the extended wall plate, the extended wall plate is disposed at an end of the plug plate in the second direction, and the plug plate has a sealing surface facing the battery cell. When projected along the second direction, the projection of the extended wall plate is at least partially located on a side of the sealing surface close to the battery cell.

[0051] In the above scheme, on the one hand, by setting the extended wall plate, the area of ​​the first sealing surface can be set as large as possible, so that the first sealing surface is effectively connected to the second sealing surface of the second box body, thereby improving the connection stability of the first box body and the second box body, and improving the reliability of the battery; on the other hand, the projection of the extended wall plate along the second direction is at least partially set to be located on the side of the cover surface close to the battery cell, which can avoid the extended wall plate extending outward to increase the overall size of the battery along the first direction, so as to improve the space utilization of the battery in the first direction, and can accommodate more battery cells or a smaller volume, so that the battery has a higher volume energy density.

[0052] According to some embodiments of the present application, along the second direction, a projection of the first sealing member is at least partially located on a side of the sealing surface close to the battery cell.

[0053] In the above solution, the projection of the first sealing member along the second direction is at least partially arranged to be located on the side of the cover surface close to the battery cell, which can improve the sealing performance between the extended wall plate and the second box body.

[0054] According to some embodiments of the present application, along the second direction, a projection of the first sealing member at least partially overlaps with a projection of the battery cell.

[0055] In the above scheme, the projection of the first seal along the second direction is set to at least partially overlap with the projection of the battery cell, so that the first seal does not occupy the space in the first direction as much as possible, so as to improve the space utilization of the battery in the first direction, and can accommodate more battery cells or a smaller volume, so that the battery has a higher volume energy density.

[0056] According to some embodiments of the present application, the second sealing surface is disposed on the inner wall surface of the surrounding frame, and at least a portion of the first sealing surface is disposed on the outer wall surface of the plug plate.

[0057] In the above solution, the outer wall surface of the plug plate can be provided with a first sealing surface to connect with the inner wall surface of the surrounding frame, and there is no need to provide an additional connecting wall, which makes the box body processing simpler and saves processing costs.

[0058] According to some embodiments of the present application, the battery further includes a first connector, which penetrates the first sealing interface along the second direction and is locked into the plug plate.

[0059] In the above solution, by providing a first connecting member to connect the plug plate and the surrounding frame, the connection stability between the plug plate and the surrounding frame can be improved, thereby improving the structural stability of the battery and making the battery have higher reliability.

[0060] According to some embodiments of the present application, along the first direction, a projection of the first connecting member at least partially overlaps with a projection of the battery cell.

[0061] In the above scheme, along the first direction, the projection of the first connecting member and the projection of the battery cell at least partially overlap, so that the plug plate provides a deeper locking depth for the first connecting member, so that the first connecting member can be firmly locked to the plug plate, thereby improving the connection stability between the plug plate and the second box body, and making the battery have higher reliability.

[0062] According to some embodiments of the present application, the battery includes at least one battery pack, the battery pack includes a plurality of battery cells arranged in a group, and the battery pack is provided with a binding member, the binding member is used to bind the plurality of battery cells arranged in a group.

[0063] In the above solution, the multiple battery cells arranged in groups in the battery pack are bound by the binding members so as to be arranged in an orderly manner in the closed space, thereby improving the utilization rate of the closed space and further improving the energy density of the battery.

[0064] According to some embodiments of the present application, a battery pack includes a first battery pack and a second battery pack that are adjacently arranged along a second direction. The first battery pack is provided with a first bundling member, and the second battery pack is provided with a second bundling member. Along the second direction, a first portion of the first bundling member is provided on a side of the first battery pack facing the second battery pack, and along the second direction, a second portion of the second bundling member is provided on a side of the second battery pack facing the first battery pack. Along the second direction, a projection of the first portion and a projection of the second portion are staggered, and, along a direction perpendicular to the first surface, the projection of the first portion and the projection of the second portion at least partially overlap.

[0065] In the above scheme, by staggering the projection of the first part along the second direction and the projection of the second part along the second direction, and at least partially overlapping the projection of the first part along the first direction and the projection of the second part along the first direction, the space occupied by the bundling in the second direction can be effectively reduced, the utilization rate of the enclosed space by multiple battery packs can be improved, and the volume energy density of the battery can be improved.

[0066] According to some embodiments of the present application, there are multiple battery packs. The bundle includes an outer frame and a partition bar, the partition bar is arranged inside the outer frame and divides the inside of the outer frame into multiple subspaces, and each battery pack is respectively arranged in a subspace.

[0067] In the above scheme, the bundling piece includes an outer frame and a partition bar, and the outer shell is divided into multiple sub-spaces by the partition bar, so that one bundling piece can bundle multiple battery packs at the same time, thereby reducing the occupation of the enclosed space by the bundling piece, so that the enclosed space can accommodate more battery cells, and the battery has a higher volume energy density.

[0068] According to some embodiments of the present application, there are multiple battery packs, and the multiple battery packs are arranged along the second direction. The battery further includes an end plate, which is connected to the end surfaces of the multiple battery packs in the first direction, and the binding piece is connected to the end plate.

[0069] In the above scheme, multiple battery packs are arranged along the second direction, and an end plate is provided at one end of the multiple battery packs in the first direction. The multiple battery packs can be effectively integrated into one by connecting the end plate with a bundling piece, so that the multiple battery packs are compactly arranged, the utilization rate of the enclosed space is improved, and the battery has a higher volume energy density.

[0070] According to some embodiments of the present application, the second box includes a second end wall and a second side wall, the first surface is located on the second end wall, the first sealing surface is located on the second side wall, and the second side wall is connected to the end of the second end wall in the second direction. The battery pack includes a side battery pack arranged adjacent to the second side wall in the second direction, the binding member includes a side portion, the side portion is arranged on the side of the side battery pack facing the second side wall in the second direction, and the second side wall is located on a side of the side portion close to the first surface.

[0071] In the above solution, the side battery pack is arranged adjacent to the second side wall, and in the direction perpendicular to the first surface, the side battery pack can be constrained by the binding member and the second side wall together, so that the side battery pack is stably arranged in the closed space. The second side wall is located on the side of the side portion close to the first surface, which can also be understood as the size of the second side wall in the direction perpendicular to the first surface can be made as small as possible so that the side battery pack can be stably arranged in the closed space under the constraint of the binding member.

[0072] According to some embodiments of the present application, along the second direction, the side portion and the second side wall are staggered, and when projected along a direction perpendicular to the first surface, the side portion and the second side wall at least partially overlap.

[0073] In the above scheme, the projection of the side part in the second direction and the projection of the second side wall in the second direction are staggered, and the projection of the side part in the direction perpendicular to the first surface and the projection of the second side wall in the direction perpendicular to the first surface are at least partially overlapped, which can effectively reduce the space occupied by the bundling in the second direction, improve the utilization rate of the enclosed space by multiple battery packs, and thus improve the volume energy density of the battery.

[0074] According to some embodiments of the present application, the second box body includes a second end wall, the first surface is located on the second end wall, and the battery also includes a plurality of mounting portions, and the plurality of mounting portions are all located on a surface of the second end wall facing away from the first surface.

[0075] In the above solution, a plurality of mounting parts are arranged on the second end wall to enable the battery to be stably mounted on the electrical equipment body, thereby stably providing electrical energy to the electrical equipment.

[0076] According to some embodiments of the present application, along a direction perpendicular to the first surface, projections of the plurality of mounting portions are completely located within a projection range of the first surface.

[0077] In the above scheme, by setting the projection of the mounting portion along the direction perpendicular to the first surface to completely fall within the projection range of the first surface, the mounting portion does not occupy the space outside the first surface, thereby making the battery structure compact and having a higher volume energy density.

[0078] According to some embodiments of the present application, the battery cell is a blade battery cell.

[0079] In the above solution, by setting the battery cells in the battery as blade battery cells, the volume energy density of the battery can be effectively improved.

[0080] In a second aspect, the present application further provides an electrical device, comprising a main body and a battery as described in any one of the first aspects, wherein the battery is used to provide electrical energy to the main body.

[0081] In the above solution, the electrical device adopts the battery with higher energy density provided above, so it has longer battery life and can meet more electricity needs.

[0082] According to some embodiments of the present application, the first sealing surface and the second sealing surface are parallel to the first direction, and the first sealing surface and the second sealing surface intersect with the second direction, and the first direction and the second direction are both parallel to the first surface.

[0083] In the above scheme, by setting the first sealing interface to intersect with the second direction, and the second direction is parallel to the first surface, the space occupied by the first sealing interface in the second direction can be reduced under the condition that there is good sealing between the first sealing surface and the second sealing surface, thereby improving the space utilization of the battery in the second direction, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery. For example, by setting the second sealing interface to intersect with the second direction, the sealed connection between the first box body and the second box body can be achieved without setting a flange structure protruding along the second direction, thereby improving the space utilization of the battery in the second direction, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.

[0084] According to some embodiments of the present application, the main body includes a truck frame, the truck frame includes a cab, a compartment and a battery rack located between the cab and the compartment, the battery rack is used to hold batteries, and the second direction is the direction from the cab to the compartment.

[0085] In the above scheme, the second direction is the direction from the cab to the carriage. For this reason, the electrical equipment adopts the battery provided above, which can reasonably utilize the space between the cab and the carriage. By making the first sealing interface on the battery intersect with the first surface, the space occupied by the battery as a whole along the second direction can be reduced without affecting the sealing performance of the battery, and the carriage can further occupy more space in the second direction, thereby loading more cargo; or, the space saved along the second direction can be used to improve the battery's own endurance.

[0086] According to some embodiments of the present application, the main body includes a tractor frame, the tractor frame includes a cab, a traction seat, and a battery rack located between the cab and the traction seat, the battery rack is used to hold batteries, and the second direction is the direction from the cab to the traction seat.

[0087] In the above scheme, the second direction is the direction from the cab to the traction seat. For this reason, the electrical equipment adopts the battery provided above, which can reasonably utilize the space between the cab and the traction seat. By making the first sealing interface on the battery intersect with the first surface, the space occupied by the battery as a whole along the second direction can be reduced without affecting the sealing performance of the battery. Further, the traction seat can be arranged closer to the cab, so that more space of the frame in the second direction can be used for mounting the carriage, thereby loading more cargo; or, the space saved along the second direction can be used to improve the battery's own endurance.

[0088] According to some embodiments of the present application, the body includes a frame, the frame includes a beam, and the battery is installed on at least one side of the beam along the width direction of the frame, and the second direction is the width direction of the beam.

[0089] In the above scheme, the second direction is the width direction of the vehicle frame. For this reason, the electrical equipment adopts the battery provided above, which can reasonably utilize the space in the width direction of the vehicle frame. By making the first sealing interface on the battery intersect with the first surface, the space occupied by the battery as a whole along the second direction can be reduced without affecting the sealing performance of the battery. When the layout space of the battery as a whole along the width direction of the vehicle frame is limited, the space saved by the first sealing interface through the above setting can be used to improve the battery's own endurance.

[0090] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0092] Figure 1 A schematic diagram of a vehicle in some embodiments of the present application;

[0093] Figure 2A three-dimensional diagram of a battery in some embodiments of the present application;

[0094] Figure 3 A three-dimensional exploded view of a local structure of a battery in some embodiments of the present application;

[0095] Figure 4 A 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 the present application;

[0096] Figure 5 A 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 the present application;

[0097] Figure 6 A schematic diagram of a battery cell, a first surface, a first sealing surface, a second sealing surface, and a first sealing member in some embodiments of the present application;

[0098] Figure 7 A three-dimensional diagram of the second box in some embodiments of the present application;

[0099] Figure 8 for Figure 7 The enlarged view of point A in the middle;

[0100] Fig. 9 A schematic diagram of a second end wall, a first sealing member, and a first sealing surface in some embodiments of the present application;

[0101] Fig.10 A three-dimensional diagram of a first box in some embodiments of the present application;

[0102] Fig.11 A three-dimensional diagram of a battery in some other embodiments of the present application;

[0103] Fig.12 This is a schematic diagram of the partial structure of the second box in some embodiments of the present application;

[0104] Fig.13 This is a schematic diagram of the partial structure of the first box in some embodiments of the present application;

[0105] Fig.14 This is a schematic diagram of a partial structure of a second sealing member in some embodiments of the present application;

[0106] Fig.15 It is a schematic diagram of the partial structure of the first box in some other embodiments of the present application;

[0107] Fig.16 It is a schematic diagram of the partial structure of the second box in some other embodiments of the present application;

[0108] Fig.17It is a schematic diagram of the second box in some other embodiments of the present application;

[0109] Fig.18 Schematic diagrams of the first fastener and the first surface in some other embodiments of the present application;

[0110] Fig.19 Schematic diagram of the specific structure of the battery in some other embodiments of the present application;

[0111] Fig. 20 A schematic diagram of a first box in some other embodiments of the present application;

[0112] Fig.21 A schematic diagram of a battery pack in some embodiments of the present application;

[0113] Fig. 22 A schematic diagram of a first battery pack and a second battery pack in some embodiments of the present application;

[0114] Fig.23 Schematic diagrams of bundles and battery packs in other embodiments of the present application;

[0115] Fig.24 A schematic diagram of a battery pack and a second side wall in some embodiments of the present application;

[0116] Fig.25 A schematic diagram of an electrical device in some embodiments of the present application;

[0117] Fig.26 A schematic diagram of an electrical device in some embodiments of the present application;

[0118] Fig. 27 A schematic diagram of an electrical device in some embodiments of the present application;

[0119] Fig.28 This is a schematic diagram of a vehicle frame and a battery in some embodiments of the present application.

[0120] Icons: 100-battery; 101-battery cell; 102-enclosed space; 103-first sealing interface; 10-first box; 11-first sealing surface; 12-first end wall; 120-first end wall; 13-first side wall; 14-fourth side wall; 15-plug plate; 16-extended wall plate; 17-connecting portion; 170-matching surface; 20-second box; 21-first surface; 22-second sealing surface; 23-second end wall; 24-second side wall; 25-third side wall; 250-first flat surface; 251-second flat surface; 252-transition surface; 2520-inclined surface; 2521-arc surface; 26-enclosing frame; 30-first sealing member; 40-second sealing member; 41-first sub-seal member; 42-second sub-seal member; 43-third sub-seal; 50-first fastener; 51-second fastener; 52-first connecting member; 60-battery pack; 61-first battery pack; 62-second battery pack; 63-side battery pack; 70-bundling; 71-first bundling; 710-first part; 72-second bundling; 720-second part; 73-outer frame; 74-dividing bar; 75-side part; 80-end plate; 90-mounting part; 91-crossbeam; x-first direction; y-second direction; z-third direction; 1000-vehicle; 200-controller; 300-motor; 1001-body; 1002-cab; 1003-carriage; 1004-battery rack; 1005-traction seat; 1006-vehicle beam; 1007-longitudinal beam. DETAILED DESCRIPTION

[0121] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0122] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order or a primary and secondary relationship, and are not used to limit the quantity.

[0123] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0124] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0125] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0126] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0127] The term "plurality" used in the present application refers to two or more (including two).

[0128] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0129] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0130] A battery cell may include an electrode assembly. The electrode assembly may include a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0131] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0132] In some embodiments, the electrode assembly may be cylindrical in shape.

[0133] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0134] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0135] As examples, the battery cells may be cylindrical battery cells, prismatic battery cells, pouch battery cells, or battery cells of other shapes.

[0136] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0137] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0138] In some embodiments, the battery may be a battery pack, which includes a box and a battery cell, wherein the battery cell or battery module is contained in the box. The box may include a first box and a second box, wherein the first box and the second box are connected to form a closed space. The second box has a first surface, and the first surface is used to carry the battery cell. The battery cell is disposed in the closed space to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

[0139] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0140] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0141] In the development of battery technology, how to improve the energy density of the battery is a technical problem that needs to be solved urgently. The inventor found that the edges of the first box and the second box of the current battery are both provided with flange structures protruding to the outside of the battery (usually protruding in a direction parallel to the first surface), and a sealing interface is formed between the flange structures to achieve a sealed connection between the first box and the second box. However, the protruding flange structure will occupy the space in the direction parallel to the first surface, resulting in low battery space utilization and affecting the volume energy density of the battery.

[0142] In view of this, in order to improve the problem that the protruding flange structure occupies extra space, resulting in low battery space utilization and affecting battery energy density, some embodiments of the present application provide a battery, the battery comprising a battery cell, a first box and a second box. The first box and the second box are together enclosed to form a closed space for accommodating the battery cell, and a first sealing interface formed by the first box and the second box being connected to each other intersects with a first surface for supporting the battery cell.

[0143] In the above scheme, by setting the first sealing interface to intersect with the first surface, that is, the first sealing interface is not parallel to the first surface, the projection area of ​​the first seal on the first surface can be reduced, and the space occupied by the first sealing interface in the direction parallel to the first surface can be reduced, thereby improving the space utilization of the battery in the direction parallel to the first surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volume energy density of the battery.

[0144] The battery disclosed in the embodiment of the present application can be used in, but not limited to, a battery cabinet, a container-type energy storage device, etc. The energy storage device may include multiple batteries disclosed in the present application.

[0145] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. The battery disclosed in the present application can be used to form a power supply system of the electrical equipment.

[0146] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a heavy truck, a bus, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0147] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0148] Please refer to Figure 1 , Figure 1 Schematic diagram of a vehicle in some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The type of vehicle 1000 may be a sedan, an off-road vehicle, a heavy truck or a bus, etc. A battery 100 is provided inside the vehicle 1000, and the battery 1000 may be provided at the bottom, the head or the tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand during the startup, navigation and operation of the vehicle 1000.

[0149] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0150] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0151] According to some embodiments of the present application, a battery 100 is provided. Figure 2-Figure 5 , Figure 2 This is a three-dimensional diagram of a battery 100 in some embodiments of the present application. Figure 3 This is a three-dimensional exploded view of a local structure of a battery 100 in some embodiments of the present application. Figure 4 1 is a schematic diagram of a battery cell 101, a first surface 21, a first sealing surface 11, a second sealing surface 22 and a first sealing interface 103 in some embodiments of the present application. Figure 5 Schematic diagram of a battery cell 101 , a first surface 21 , a first sealing surface 11 , a second sealing surface 22 , and a first sealing interface 103 in some embodiments of the present application.

[0152] The battery 100 includes a battery cell 101, a first box 10, and a second box 20. The first box 10 includes a first sealing surface 11. The second box 20 includes a first surface 21 and a second sealing surface 22. The first surface 21 is used to carry the battery cell 101. The first box 10 and the second box 20 are enclosed together to form a closed space 102 for accommodating the battery cell 101. The first sealing surface 11 cooperates with the second sealing surface 22 to form a first sealing interface 103 for sealing the closed space 102. The first sealing interface 103 intersects with the first surface 21.

[0153] The battery 100 may include a first box body 10 and a second box body 20 , which are connected to each other (eg, the first box body 10 and the second box body 20 cover each other), and the first box body 10 and the second box body 20 jointly define a closed space 102 for accommodating a battery cell 101 .

[0154] Optionally, the first box 10 and the second box 20 may be hollow structures with one side open, and the open side of the first box 10 and the open side of the second box 20 cooperate with each other so that the first box 10 and the second box 20 jointly define a closed space 102 (see Figure 3 ); Optionally, the first box body 10 may be a hollow structure with one end open, and the second box body 20 may be a plate-like structure, and the second box body 20 is arranged on the open side of the first box body 10, so that the first box body 10 and the second box body 20 jointly define a closed space 102 (see Fig.11 Optionally, the second box 20 may be a hollow structure with one end open, and the first box 10 may be a plate-like structure, and the first box 10 is disposed on the open side of the second box 20, so that the first box 10 and the second box 20 together define a closed space 102 (see Fig.19 ).

[0155] Of course, the box body formed by the first box body 10 and the second box body 20 can be in various shapes, such as a K-cube or a cylinder. Figure 2 In the embodiment, the box body is a rectangular parallelepiped structure.

[0156] Optionally, the battery cell 101 disposed in the closed space 102 may be one or more. Exemplarily, the battery 100 is provided with a plurality of battery cells 101, and the plurality of battery cells 101 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the plurality of battery cells 101 are both connected in series and in parallel. The plurality of battery cells 101 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the plurality of battery cells 101 is accommodated in the closed space 102; of course, the battery 100 may also be a battery module formed by first connecting a plurality of battery cells 101 in series, in parallel, or in a mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in the closed space 102.

[0157] In some embodiments, the second box 20 can be regarded as the part that mainly carries the battery cell 101. For example, in some embodiments, the second box 20 can be used as the lower box of the battery 100, and the first surface 21 in the second box 20 is the surface that carries the battery cell 101. The battery cell 101 can be placed on the first surface 21. In some embodiments, the first box 10 can be regarded as a component that cooperates with the second box 20 to enclose the closed space 102 together with the second box 20. For example, in some embodiments, the first box 10 can be regarded as the upper box of the battery 100. In some embodiments, the materials of the first box 10 and the second box 20 can be different or the same. In some embodiments, the materials of the first box 10 and the second box 20 can be aluminum, aluminum alloy, stainless steel or plastic, etc. Among them, when the second box body 20 is used as the main part to support the battery cell 101, the second box body 20 can be made of a material with strong structural strength, such as aluminum alloy, steel or other materials with high structural strength. The first box body 10 can be made of a material with lower density, such as plastic, so that the mass of the first box body 10 will not affect the mass energy density of the battery 100 as much as possible.

[0158] The first sealing surface 11 is a surface of the first box body 10 for sealing connection with the second sealing surface 22 of the second box body 20, and the second sealing surface 22 is a surface of the second box body 20 for sealing connection with the first sealing surface 11 of the first box body 10. In some embodiments, the first sealing surface 11 and the second sealing surface 22 are sealed to achieve the sealing of the closed space 102, so as to reduce the interference of external substances on the battery cells 101 in the closed space 102.

[0159] In some embodiments, the first sealing surface 11 and the second sealing surface 22 may be connected by welding, bonding, or by using other connecting members (such as threaded members).

[0160] In some embodiments, the first sealing interface 103 can be understood as an interface where the first sealing surface 11 and the second sealing surface 22 are stacked on each other in the arrangement direction of the first sealing surface 11 and the second sealing surface 22. Or 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. Or the first sealing interface 103 can be understood as an interface formed between the first sealing surface 11 and the second sealing surface 22 that can be used to set a seal, a sealing gasket or a sealant to achieve an effective seal between the first sealing surface 11 and the second sealing surface 22.

[0161] See also Figure 4 and Figure 5The first sealing interface 103 can be regarded as an interface where the first sealing surface 11 and the second sealing surface 22 are connected to each other to form a sealing interface between the first sealing surface 11 and the second sealing surface 22.

[0162] “The first sealing interface 103 intersects the first surface 21” can be understood as the plane where the first sealing interface 103 is located is perpendicular or inclined to the plane where the first surface 21 is located, that is, the plane where the first sealing interface 103 is located is not the same plane as the plane where the first surface 21 is located, or is not parallel. In some embodiments, the first sealing interface 103 can be perpendicular to the first surface 21, for example Figure 4 In the embodiment, the first surface 21 can be regarded 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 arranged obliquely 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.

[0163] See also Figure 2 and Figure 3 The first box body 10 may include a first end wall 12 and a first side wall 13, and the second box body 20 may include a second end wall 23. The first end wall 12 and the second end wall 23 are arranged opposite to each other in the third direction z. A first surface 21 is formed on the second end wall 23, and the first surface 21 is arranged perpendicular to the third direction z. The first side wall 13 may extend along the third direction z, and the first side wall 13 may form a first sealing surface 11 parallel to the third direction z. The second box body 20 may form 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 a 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.

[0164] In the above scheme, 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 projection area of ​​the first sealing interface on the first surface can be reduced, and the space occupied by the first sealing interface 103 in the direction parallel to the first surface 21 can be reduced, thereby improving the space utilization of the battery 100 in the direction parallel to the first surface 21, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.

[0165] According to some embodiments of the present application, the first sealing surface 11 and the second sealing surface 22 are parallel to the first direction x, and the first sealing surface 11 and the second sealing surface 22 intersect with the second direction y, and the first direction x and the second direction y are both parallel to the first surface 21 .

[0166] “The first sealing surface 11 and the second sealing surface 22 are parallel to the first direction x” can be understood as that the first direction x does not pass through the first sealing surface 11 and the second sealing surface 22. It can also be understood as that the first sealing surface 11 and the second sealing surface 22 are arranged along the first direction x, so that the first sealing surface 11 and the second sealing surface 22 can be arranged relative to each other along the first direction x, thereby forming the first sealing interface 103.

[0167] The second direction y may be a direction intersecting with the first direction x. “The first sealing surface 11 and the second sealing surface 22 intersect with the second direction y” may be understood as the second direction y being able to pass through the first sealing surface 11 and the second sealing surface 22, or may be understood as the second direction y intersecting with the first sealing interface 103, that is, the second direction y passes through the first sealing interface 103. In some embodiments, the first sealing surface 11 and the second sealing surface 22 may be perpendicular to the second direction y. In some embodiments, the first sealing interface 103 may be perpendicular to the second direction y.

[0168] The first direction x and the second direction y are directions parallel to the first surface 21, and the first direction x and the second direction y can be understood as directions that do not pass through the first surface 21. For example, in some embodiments, the first surface 21 can be rectangular, the first direction x can be parallel to the length direction or width direction of the rectangular surface, and the second direction y can be parallel to the width direction or length direction of the rectangular surface. In some embodiments, the first direction x can be parallel to the length direction of the rectangular first surface 21, the second direction y can be parallel to the width direction of the first surface 21, the first sealing surface 11 and the second sealing surface 22 can be located on one side of the width direction of the first surface 21, and the first sealing surface 11 and the second sealing surface 22 are arranged in the width direction, and the first sealing interface 103 is formed between the first sealing surface 11 and the second sealing surface 22.

[0169] In the battery 100 with the external convex flange structure, the flange structure can protrude along the second direction y, that is, the sealing interface between the flange structures is parallel to the second direction y. In the above scheme, by setting the first sealing interface 103 to intersect with the second direction y, the space occupied by the first sealing interface 103 in the second direction y can be reduced, thereby improving the space utilization of the battery 100 in the second direction y, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100. For example, setting the first sealing interface 103 to be perpendicular to the second direction y can improve the space utilization of the battery 100 in the second direction y, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.

[0170] According to some embodiments of this application, see Figure 3and Figure 6 , Figure 6 Schematic diagram of a battery cell 101 , a first surface 21 , a first sealing surface 11 , a second sealing surface 22 , and a first sealing member 30 in some embodiments of the present application.

[0171] A first sealing member 30 is disposed between the first sealing surface 11 and the second sealing surface 22 . The first sealing member 30 is located on a side of the first sealing surface 11 or the second sealing surface 22 that is away from the closed space 102 and close to the closed space 102 .

[0172] The first seal 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 seal 30 may be a sealant or a sealing gasket, and the first seal 30 is clamped between the first sealing surface 11 and the second sealing surface 22.

[0173] In some embodiments, the first seal 30 can be a flat plate-like component, and the first sealing surface 11 and the second sealing surface 22 are tightly fitted to the first seal 30 and cause the first seal 30 to deform to fill the uneven gap between the first box body 10 and the second box body 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.

[0174] In some embodiments, the first seal 30 can be connected to the first box 10 and the second box 20 by abutting, pressing, bonding or other connecting methods using connecting parts (such as screws). For example, the first box 10 and the second box 20 are snap-fitted, and the first sealing surface 11 and the second sealing surface 22 are pressed or abutted against each other under the action of the elasticity of the materials of the first box 10 and the second box 20, so that the first seal 30 can be clamped between the first sealing surface 11 and the second sealing surface 22. For example, the first box 10 and the second box 20 are connected by bolts, and the bolts pass through the first sealing surface 11, the first seal 30 and the second sealing surface 22, so that the first seal 30 can be clamped between the first sealing surface 11 and the second sealing surface 22.

[0175] “The first sealing member 30 is located on the side of the first sealing surface 11 and the second sealing surface 22 that is away from the closed space 102 and close to the closed space 102” can be understood as that the first sealing surface 11, the second sealing surface 22 and the arrangement method of the second sealing surface 22 are not perpendicular to the first surface 21. In some embodiments, along the second direction y, the first sealing surface 11, the first sealing member 30 and the second sealing surface 22 can be arranged in sequence, wherein the first sealing surface 11 is closer to the closed space 102 than the first sealing member 30 and the second sealing surface 22; in other embodiments, along the second direction y, the second sealing surface 22, the first sealing member 30 and the first sealing surface 11 can be arranged in sequence, wherein the second sealing surface 22 is closer to the closed space 102 than the second sealing member 40 and the second sealing surface 22.

[0176] In the above scheme, by setting the first sealing member 30 between the first sealing surface 11 and the second sealing surface 22, the sealing between the first sealing surface 11 and the second sealing surface 22 can be effectively improved, reducing the risk of external substances entering the closed space 102 and causing damage to the battery cell 101, thereby improving the reliability of the battery 100.

[0177] According to some embodiments of the present application, along the width direction of the first seal 30 (the width direction of the first seal 30 is indicated by the label w in the figure), one end of the first seal 30 is close to the enclosed space 102, and the other end of the first seal 30 is close to the outside of the battery 100, and the width direction of the first seal 30 intersects with the first surface 21.

[0178] The width direction of the first seal 30, the length direction of the first seal 30, and the thickness direction of the first seal 30 are perpendicular to each other. The thickness direction of the first seal 30 may be the arrangement direction of the first sealing surface 11 and the second sealing surface 22, for example, the thickness direction of the first seal 30 may be the second direction y.

[0179] In some embodiments, the length direction of the first sealing member 30 may be a direction parallel to the first surface 21, for example, the length direction of the first sealing member 30 may be a first direction x. In some embodiments, when the first direction x and the second direction y are both 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 sealing member 30 may be a direction perpendicular to the first surface 21. In some embodiments of the present application, the direction perpendicular to the first surface 21 is defined as the third direction z. See Figure 3 The first sealing member 30 can extend along the first direction x so as to cover the portion 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.

[0180] In some other embodiments, the length direction of the first sealing member 30 may be a direction intersecting the first surface 21, for example, the length direction of the first sealing member 30 may be the third direction z, and the width direction of the first sealing member 30 may be a direction parallel to the first surface 21, for example, the first direction x. Fig.19 The second box body 20 can be a frame 26, and the frame 26 has an opening at the end in the first direction x. The first box body 10 is inserted into the second box body 20 along the first direction x and closes the opening. The first sealing surface 11 is perpendicular to the first surface 21, and 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.

[0181] In the above scheme, by setting the width direction of the first seal 30 to intersect with the first surface 21, the width direction of the first seal 30 can be made non-parallel to the first surface 21, so that under the condition that the first seal 30 plays a good sealing role, the projection area of ​​the first seal on the first surface can be reduced, and the space occupied by the first seal 30 in the direction parallel to the first surface 21 is reduced, thereby improving the space utilization of the battery 100 in the direction parallel to the first surface 21, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.

[0182] According to some embodiments of this application, see Figure 7 and Figure 8 , Figure 7 This is a three-dimensional diagram of the second box 20 in some embodiments of the present application. Figure 8 for Figure 7 The second box body 20 includes a second end wall 23 and a second side wall 24, the first surface 21 is located on the second end wall 23, at least part 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, and the projection of the second side wall 24 along the second direction y is at least partly located on the side of the first surface 21 close to the battery cell 101.

[0183] The second end wall 23 may be a main part of the second box 20, and has a first surface 21 for carrying the battery 100. In some embodiments, the first surface 21 is a surface of the second end wall 23 in the third direction z, and the first surface 21 is disposed toward the first box 10. In some embodiments, the second end wall 23 may be a plate-like structure, and the first surface 21 is a surface of the second end wall 23 in the third direction z, for example, the first surface 21 is an upper surface of the second end wall 23, and the lower surface of the second end wall 23 is a surface away from the closed space 102. In some other embodiments, the lower surface of the first end wall 12 is defined as a surface of the second end wall 23 away from the closed space 102, and the upper surface of the first end wall 12 is defined as a surface away from the lower surface of the first end wall 12, and the first surface 21 may be a part of the upper surface of the second end wall 23, for example, a groove is formed on the upper surface of the second end wall 23, and the first surface 21 may be the bottom surface of the groove; for another example, a protrusion may be formed on the upper surface of the second end wall 23, and the first surface 21 may be the surface of the protrusion.

[0184] The second side wall 24 is a component disposed at the end of the second end wall 23 in the second direction y. For example, the second side wall 24 can be disposed on the side of the second end wall 23 in the second direction y. For another example, the second side wall 24 can be disposed on the upper surface of the second end wall 23 and adjacent to the side of the second end wall 23 in the second direction y. The second side wall 24 can be connected to the second end wall 23 by welding, bonding, bolting, etc., or the second side wall 24 can be integrally formed with the second end wall 23.

[0185] In some embodiments, the second end wall 23 may be rectangular, the second box body 20 may include two second side walls 24, the two side walls are arranged relatively spaced in the second direction y, each second side wall 24 is formed with a second sealing surface 22, and the first box body 10 is correspondingly provided with two first sealing surfaces 11, so that the protruding flange structure can be eliminated at both ends of the battery 100 in the second direction y, so as to effectively improve the space utilization of the battery 100. In other embodiments, the second box body 20 may include two second side walls 24, and the second sealing surface 22 is only provided on one of the second side walls 24. In other embodiments, the second box body 20 may include only one second side wall 24, and in the second direction y, the portion corresponding to the second side wall 24 may be connected to the second end wall 23 through the structure of the first box body 10.

[0186] “At least part of the second sealing surface 22 is disposed on the second side wall 24” can be understood as that the second side wall 24 is connected to the first box body 10 and forms a first sealing interface 103 with the first box body 10, and can also be understood as that at least part of the first sealing member 30 is disposed between the second side wall 24 and the first box body 10. In some embodiments, the entire second sealing surface 22 can be disposed on the second side wall 24. In some embodiments, part of the second sealing surface 22 can be disposed on the second side wall 24, and the other part can be disposed on the second end wall 23.

[0187] In some embodiments, the second side wall 24 may at least partially protrude from the first surface 21, see Figure 8 The second side wall 24 is used to connect with the side of the first end wall 12, and part of the second side wall 24 protrudes from the first surface 21. The part of the second side wall 24 protruding from the first surface 21 can constrain the battery cell 101 located in the closed space 102, and the part of the second side wall 24 protruding from the first surface 21 can provide more bearing area for the first sealing member 30, so as to have a good sealing area, so that the first sealing member 30 is stably located between the first sealing surface 11 and the second sealing surface 22, and has a good sealing effect.

[0188] “Projected along the second direction y, the projection of the second side wall 24 is at least partially located on the side of the first surface 21 close to the battery cell 101 ” can be understood as at least partially protruding from the first surface 21 , that is, at least partially protruding from the second sealing surface 22 .

[0189] In the above scheme, the second box body 20 includes a second end wall 23 and a second side wall 24. The second end wall 23 has a first surface 21 to be able to carry the battery 100. 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 larger to meet the width setting requirements of the first seal 30. On the basis of meeting the setting requirements of the first seal 30, the second box body can be set to be lighter or reduce the cost.

[0190] According to some embodiments of this application, see Figure 6 Along the second direction y, the projection of the first sealing member 30 is at least partially located on a side of the first surface 21 close to the battery cell 101 .

[0191] “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 close to the battery cell 101” can be understood as that at least part of the first seal 30 protrudes from the first surface 21, for example, part of the first seal 30 is located on the side of the first surface 21 away from the enclosed space 102, and another part of the first seal 30 is located on the side of the first surface 21 close to the battery cell 101; for another example, the entire first seal 30 is located on the side of the first surface 21 close to the battery cell 101.

[0192] See also Figure 6 The first sealing member 30 is clamped by 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 rest can be located above the first surface 21.

[0193] In the above solution, the second direction y may be the arrangement direction of the first sealing surface 11 and the second sealing surface 22, and the second direction y may also be the thickness direction of the first sealing surface 11. The first sealing member 30 is at least partially located on the side of the first surface 21 close to the battery cell 101 in the second direction y, so that the first sealing member 30 can have a smaller size in the second direction y as much as possible while having a larger width, so as to improve the sealing between the first sealing surface 11 and the second sealing surface 22 without increasing the space occupancy in the second direction y as much as possible, so that the battery 100 has higher reliability.

[0194] According to some embodiments of this application, see Figure 6 Along the second direction y, the projection of the first sealing member 30 and the projection of the battery cell 101 at least partially overlap.

[0195] “Along the second direction y, the projection of the first seal 30 and the projection of the battery cell 101 at least partially overlap” can be understood as that the projection of the portion of the first seal 30 protruding from the first surface 21 along the second direction y can overlap with the battery cell 101 located in the closed space 102; it can also be understood that the first seal 30 is wider, and the degree of width can be such that along the second direction y, the projection of the first seal 30 and the projection of the battery cell 101 at least partially overlap.

[0196] See also Figure 6 The first sealing member 30 is clamped by the first sealing surface 11 and the second sealing surface 22. Along the third direction z, the first sealing surface 11 extends along the third direction z 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, and the first sealing member 30 can extend along the third direction z accordingly.

[0197] In the above scheme, the projection of the first seal 30 in the second direction y at least partially overlaps with the projection of the battery cell 101, and at least part of the first seal 30 can be arranged in the space covered by the projection of the battery cell 101 along the second direction y, so that the first seal 30 has a smaller size along the second direction y and has a sealing width as large as possible, so as to effectively improve the sealing between the first sealing surface 11 and the second sealing surface 22, so that the battery 100 has higher reliability.

[0198] According to some embodiments of this application, see Fig. 9 , Fig. 9 Schematic diagram of the second end wall 23, the first sealing member 30 and the first sealing surface 11 in some embodiments of the present application.

[0199] The second box body 20 includes a second end wall 23 , the first surface 21 is located on the second end wall 23 , and the second sealing surface 22 is a side wall surface of the second end wall 23 that is perpendicular to the second direction.

[0200] The second end wall 23 may be a main part of the second box 20, and has a first surface 21 for carrying the battery 100. In some embodiments, the first surface 21 is a surface of the second end wall 23 in the third direction z, and the first surface 21 is disposed toward the first box 10. In some embodiments, the second end wall 23 may be a plate-like structure, and the first surface 21 is a surface of the second end wall 23 in the third direction z, for example, the first surface 21 is an upper surface of the second end wall 23, and the lower surface of the second end wall 23 is a surface away from the closed space 102. In some other embodiments, the lower surface of the first end wall 12 is defined as a surface of the second end wall 23 away from the closed space 102, and the upper surface of the first end wall 12 is defined as a surface away from the lower surface of the first end wall 12, and the first surface 21 may be a part of the upper surface of the second end wall 23, for example, a groove is formed on the upper surface of the second end wall 23, and the first surface 21 may be the bottom surface of the groove; for another example, a protrusion may be formed on the upper surface of the second end wall 23, and the first surface 21 may be the surface of the protrusion.

[0201] 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 the side wall surface passed through by the second direction and perpendicular to the second direction y.

[0202] In some embodiments, the second end wall 23 may be rectangular, and its two side walls in the second direction y may form a second sealing surface 22 to seal with the first sealing surface 11 of the first box body 10. In other embodiments, one side wall of the second end wall 23 in the second direction y may form a second sealing surface 22 to seal with one first sealing surface 11 of the first box body 10.

[0203] In the above scheme, the second box body 20 has a simple structure. On the one hand, the second end wall 23 of the second box body 20 serves as a component for supporting the battery cell 101. On the other hand, the second end wall 23 of the second box body 20 also has a second sealing surface 22 to connect with the first sealing surface 11 of the first box body 10, so that the second box body 20 can be set to a simpler structure and meet the sealing requirements of the first sealing surface 11 and the second sealing surface 22, thereby reducing the processing cost of the second box body 20.

[0204] According to some embodiments of this application, see Fig.10 , Fig.10 It is a three-dimensional diagram of the first box body 10 in some embodiments of the present application.

[0205] The first box body 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 arranged opposite to the first surface 21, at least a portion of the first sealing surface 11 is arranged on the first side wall 13, and at least a portion of the first side wall 13 is located on a side of the first end wall surface 120 close to the first surface 21.

[0206] The first end wall 12 may be disposed opposite to the second end wall 23. In some embodiments, the first box body 10 may be an upper box body of the battery 100, the second box body 20 may be a lower box body of the battery 100, the first end wall 12 may be a top cover or top wall of the battery 100, and the second end wall 23 may be a bottom plate or bottom wall of the battery 100. The first end wall surface 120 is a surface of the first end wall surface 120 facing the first surface 21, and the first end wall surface 120 may be an inner surface of the first end wall 12.

[0207] The first side wall 13 is a portion connected to the first end wall 12. In some embodiments, the first side wall 13 is bent relative to the first end wall 12 and extends toward the second box body 20. For example, the first side wall 13 and the first end wall 12 are vertically arranged, and the first side wall 13 extends along the third direction z. The first side wall 13 can be connected to the first end wall 12 by welding, bonding, bolting, etc., and the first side wall 13 can also be integrally formed with the first end wall 12.

[0208] “At least part of the first sealing surface 11 is arranged on the first side wall 13” can be understood as that 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, it can mean that 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, so that it can be understood that the connecting surface between the first side wall 13 and the second box body 20 is located at the second sealing surface 22 without protruding from the outer contour of the first box body 10 and the second box body 20 in the second direction y.

[0209] The first side wall 13 is provided with a first sealing surface 11 to connect with the second sealing surface 22 of the second box body 20. For example, in some embodiments, the first sealing surface 11 of the first side wall 13 is connected with the second sealing surface 22 of the second side wall 24. Alternatively, in other embodiments, the first sealing surface 11 of the first side wall 13 is connected with the second sealing surface 22 of the second end wall 23.

[0210] The first sealing surface 11 may be formed on the outer surface of the first side wall 13, or may be formed on the inner surface of the first side wall 13. For example, when the first side wall 13 is connected to the second side wall 24, and the second side wall 24 is closer to the closed space 102 than the first side wall 13, the first sealing surface 11 is formed on the inner surface of the first side wall 13.

[0211] “At least a portion of the first side wall 13 is located on a side of the first end wall 120 close to the first surface 21 ” is understood to mean that the first side wall 13 protrudes from the first end wall 120 in a direction from the first end wall 12 to the second end wall 23 .

[0212] Among them, the first side wall 13 can be arranged at the end of the first end wall 12 in the second direction y, for example, the first side wall 13 can be connected to the side of the first end wall 12 in the second direction y; for another example, the first side wall 13 can be connected to the first end wall surface 120 and be adjacent to the side of the first end wall 12 in the second direction y.

[0213] In some embodiments, when the battery 100 is a square battery 100, that is, the first end wall 12 is a square end wall, the number of the first side walls 13 can be two, and the two side walls are respectively provided with a first sealing surface 11 to respectively seal with the two second sealing surfaces 22 of the second box 20; or the number of the 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 a first sealing surface 11 of the second box 20. Or the number of the first side wall 13 is one, and the first side wall 13 is connected to the second end wall 23 or the second side wall 24.

[0214] In the above scheme, the first box body 10 has a simple structure and is easy to manufacture. The first box body 10 includes a first end wall 12 and a first side wall 13 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 surface 120 close to the first surface 21, on the one hand, the first box body 10 and the second box body 20 can be enclosed to form a closed space 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 between the first sealing surface 22, so that the battery 100 has a higher reliability.

[0215] According to some embodiments of the present application, at least a portion of the first side wall 13 is located on a side of the first surface 21 away from the battery cell 101 .

[0216] “At least part of the first side wall 13 is located on the side of the first surface 21 away from the battery cell 101” can be understood as that the end of the first side wall 13 can exceed the first surface 21 along the direction from the first end wall 12 to the second end wall 23, that is, 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 side wall 13 and the projection of the second end wall 23 at least partially overlap. Figure 2 , the end of the first side wall 13 may be parallel to the lower surface of the second end wall 23 .

[0217] In some embodiments, the height of the enclosed space 102 in the battery 100 can be limited by the first end wall 12 and the second end wall 23. In order to place the battery cell 101 in the enclosed space, it is necessary to set a surrounding member between the first end wall 12 and the second end wall 23, such as the first side wall 13 and the second side wall 24. As the main load-bearing component of the battery 100, the second box body 20 is made of a material with higher density and higher cost. In order to reduce the mass and cost of the battery 100 as much as possible, the second side wall 24 of the second box body 20 is cancelled, that is, the first side wall 13 is connected to the second end wall 23, or, under the condition that the first sealing surface 11 and the second sealing surface 22 have good sealing properties, the second side wall 24 of the second box body 20 can be made as short as possible and connected to the first side wall 13.

[0218] In the above scheme, at least part of the first side wall 13 is located on the side of the first surface 21 away from the battery cell 101, which can also be understood as at least part of the first sealing surface 11 is located on the side of the first surface 21 away from the battery cell 101. On the one hand, the area of ​​the first sealing surface 11 can be as large as possible to form better connection stability and sealing 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 through other connecting parts, because 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 connecting part in the second direction y, so as to improve the locking strength of the connecting part to 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 100 have higher reliability.

[0219] According to some embodiments of this application, see Figure 7 The second box body 20 further includes a third side wall 25 , which is disposed at an end of the second end wall 23 in the first direction x. The third side wall 25 extends toward the first box body 10 and is connected to the first box body 10 .

[0220] The third side wall 25 is a component disposed at the end of the second end wall 23 in the first direction x. The third side wall 25 can be connected to the second end wall 23 by welding, bonding, bolting, etc., and the third side wall 25 can also be integrally formed with the second end wall 23. The third side wall 25 can improve the structural strength of the second end wall 23 so that the second end wall 23 can stably carry the battery cell 101. In some embodiments, the third side wall 25 can be used to install components such as explosion-proof valves, water-cooled connectors, or high and low voltage connectors.

[0221] In some embodiments, the third sidewall 25 may be disposed on a side surface of the second end wall 23 in the first direction x, and the third sidewall 25 may be disposed on the first surface 21 and adjacent to the side surface of the second end wall 23 in the first direction x.

[0222] In some embodiments, the battery 100 may be a square battery 100, the first end wall 12 may be a square end wall, the first direction x may be a length direction of the first end wall 12, and the second direction y may be a width direction of the first end wall 12, see Figure 7 and Fig.10 The first box body 10 includes two first side walls 13, which are spaced apart to form an opening. The third side wall 25 can close the opening. In some embodiments, a plurality of first side walls 13 and a plurality of third side walls 25 are arranged around the periphery of the closed space 102.

[0223] The third side wall 25 can be connected to the first box body 10 by welding, bonding, bolting or the like.

[0224] In some embodiments, a portion of the third side wall 25 may be connected to the first end wall surface 120 of the first end wall 12, and another portion of the third side wall 25 may be connected to the first side wall 13. In some embodiments, a portion of the third side wall 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 side wall 25 may be connected to the first side wall 13. In some embodiments, the first box body 10 is provided with a portion corresponding to the third side wall 25 and not the first end wall 12 and the first side wall 13, so as to be connected to the third side wall 25 accordingly.

[0225] In the above scheme, by setting the third side wall 25 at the end of the second end wall 23 in the first direction x, the second end wall 23 can be connected to the first box body 10 through the third side wall 25 in the first direction x, thereby improving the connection stability between the first box body 10 and the second box body 20, and further improving the reliability of the battery 100.

[0226] In some other embodiments, see Fig.11 , Fig.11 This is a three-dimensional diagram of a battery 100 in some other embodiments of the present application. In these other embodiments, the second box 20 may not be provided with the third side wall 25, and the first box 10 may be provided with the 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 of the third side wall 25 is connected to the second box 20, for example, the other end of the third side wall 25 is connected to the second end wall 23 or connected to other components provided on the second end wall 23. The above design can effectively reduce the mass and cost of the battery 100 when the second box 20 uses a material with a higher density and a higher cost.

[0227] According to some embodiments of this application, see Fig.12 and Fig.13 , Fig.12 This is a partial structural diagram of the second box 20 in some embodiments of the present application. Fig.13 It is a schematic diagram of the partial structure of the first box body 10 in some embodiments of the present application.

[0228] The third side wall 25 includes a first flat surface 250 facing away from the first surface 21 and a second flat surface 251 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 side wall 13 .

[0229] The first flat surface 250 is a flat surface located on the third side wall 25. In some embodiments, along the third direction z, the first flat surface 250 is the surface of the third side wall 25 facing the first end wall 12. The first flat surface 250 is sealed and connected 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 in close contact. 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, see Fig.13 The first end wall 12 is provided with a connecting portion 17 , which is in a sheet shape, and a portion of the connecting portion 17 is connected to the first flat surface 250 .

[0230] The second flat surface 251 is a flat surface located on the third side wall 25 and intersecting with the first flat surface 250. In some embodiments, along the second direction y, the second flat surface 251 is the surface of the third side wall 25 facing the first side wall 13, and the second flat surface 251 is sealed and connected to the first side wall 13, for example, the second flat surface 251 and the first side wall 13 cooperate with each other and are tightly attached. The second flat surface 251 can be connected to the first side wall 13 by welding, bonding, or bolting. In some embodiments, the second flat surface 251 can be connected to the first side wall 13 by other components, for example, see Fig.13 The first side wall 13 is provided with a connecting portion 17 , which is in a sheet shape, and a portion of the connecting portion 17 is connected to the second flat surface 251 .

[0231] In the above solution, the third side wall 25 is connected to the first box body 10 through the first flat surface 250 and the second flat surface 251, which can effectively improve the connection stability and sealing of the first box body 10 and the second box body 20, so that the battery 100 has a higher reliability. Among them, the second flat surface 251 is arranged to intersect with the second direction y, and the second flat surface 251 is used to be sealed and connected with the first side wall 13, so that the space utilization rate of the battery 100 in the second direction y can be effectively improved, so that more battery cells 101 can be accommodated or the volume of the battery 100 can be reduced, thereby improving the volume energy density of the battery 100.

[0232] According to some embodiments of the present application, see Figure 3 The battery 100 further includes a second sealing member 40 , which is disposed between the third side wall 25 and the first box body 10 .

[0233] The second sealing member 40 may be a component having sealing properties and disposed between the third side wall 25 and the first box body 10. In some embodiments, the first sealing member 30 may be a sealant or a sealing gasket, and the second sealing member 40 is clamped between the third side wall 25 and the first box body 10.

[0234] In some embodiments, the second seal 40 may be a flat plate-like component, and the third side wall 25 and the first box body 10 are tightly fitted to the second seal 40 and the second seal 40 is deformed to fill the uneven gap between the first box body 10 and the third side wall 25 .

[0235] In some embodiments, the first sealing member 30 can be connected to the first box body 10 and the third side wall 25 by abutting, pressing, bonding or other connecting means (such as screws). For example, the first box body 10 and the second box body 20 are pressed or abutted against each other under the elasticity of the materials themselves, so that the second sealing member 40 can be clamped between the first box body 10 and the third side wall 25. For example, the first box body 10 and the second box body 20 are connected by bolts, so that the second sealing member 40 can be clamped between the third side wall 25 and the first box body 10.

[0236] In the above solution, by providing the second sealing member 40 between the third side wall 25 and the first box body 10 , the sealing performance between the third side wall 25 and the first box body 10 can be effectively improved, so that the battery 100 has higher reliability.

[0237] According to some embodiments of this application, see Fig.12 The first straight surface 250 and the second straight surface 251 are connected by a transition surface 252 , and the transition surface 252 includes an inclined surface and / or an arcuate surface. A mating surface 170 is formed at the connection between the first end wall 12 and the first side wall 13 , and the mating surface 170 is arranged corresponding to the transition surface 252 .

[0238] The transition surface 252 is a portion connecting the first flat surface 250 and the second flat surface 251 . The transition surface 252 can be provided to ensure a smooth transition between the first flat surface 250 and the second flat surface 251 .

[0239] In some embodiments, the transition surface 252 includes an inclined surface and a curved surface, for example Fig.12 In the embodiment, the transition surface 252 includes two inclined surfaces and a curved surface between the two inclined surfaces, wherein one inclined surface is connected to the first straight surface 250, and the other inclined surface is connected to the second straight surface 251. In some other embodiments, the transition surface 252 may include an inclined surface. In some other embodiments, the transition surface 252 may include a curved surface, for example, the first straight surface 250 and the second straight surface 251 are connected by the curved surface.

[0240] The mating surface 170 is used to match the transition surface 252. The mating surface 170 and the transition surface 252 cooperate with each other to ensure good sealing between the third side wall 25 and the first box body 10. In some embodiments, the mating surface 170 may include an inclined surface and an arc surface, such as Fig.12In the embodiment, the transition surface 252 includes two arcuate surfaces 2521 and an inclined surface 2520 located between the two arcuate surfaces 2521, wherein one arcuate surface 2521 is connected to the first straight surface 250, and the other arcuate surface 2521 is connected to the second straight surface 251. Alternatively, in some embodiments, the first housing 10 is provided with a connecting portion 17, the connecting portion 17 is connected to the first end wall 12 and the second side wall 24, a portion of the connecting portion 17 cooperates with the first straight surface 250, and the remaining portion of the connecting portion 17 forms a matching surface 170 to cooperate with the transition surface 252.

[0241] In the above scheme, a transition surface 252 is provided to enable a smooth transition between the first flat surface 250 and the second flat surface 251. On the one hand, this facilitates the second seal 40 to be closely attached to the surface where the third side wall 25 and the first box body 10 are interconnected. On the other hand, the risk of sealing failure caused by damage of the second seal 40 due to interference between the edges and corners of the first flat surface 250 and the second flat surface 251 is reduced, thereby making the battery 100 have higher reliability.

[0242] According to some embodiments of this application, see Fig.14 , Fig.14 It is a partial schematic diagram of the second seal 40 in some embodiments of the present application. The second seal 40 includes a first sub-seal 41, a second sub-seal 42 and a third sub-seal 43. The first sub-seal 41 is arranged between the first flat surface 250 and the first end wall 12, the second sub-seal 42 is arranged between the second flat surface 251 and the first side wall 13, and the third sub-seal 43 is arranged between the transition surface 252 and the mating surface 170.

[0243] 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, Fig.12 and Fig.14 The third sub-seal 43 includes a portion corresponding to the inclined surface and a portion corresponding to the arcuate surface. In some embodiments, the third sub-seal 43 is clamped and deformed by the transition surface 252 and the matching surface 170 .

[0244] In the above scheme, by setting the second seal 40 as the first sub-seal 41, the second sub-seal 42 and the third sub-seal 43, and setting the first sub-seal 41, the second sub-seal 42 and the third sub-seal 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, the second seal 40 can be tightly attached to the surface where the third side wall 25 and the first box body 10 are interconnected, thereby improving the sealing between the first box body 10 and the second box body 20, thereby making the battery 100 have higher reliability.

[0245] According to other embodiments of the present application, see Fig.15 and Fig.16 , Fig.15 Schematic diagram of the partial structure of the first box body 10 in some other embodiments of the present application, Fig.16 Schematic diagram of the partial structure of the second box body 20 in some other embodiments of the present application.

[0246] The first box body 10 further includes a fourth side wall 14, and the fourth side wall 14 is adjacent to the first side wall 13. One end of the fourth side wall 14 is connected to the first end wall 12, and the third side wall 25 is connected to the fourth side wall 14.

[0247] The fourth side wall 14 is a component protruding from the first end wall surface 120 and adjacent to the first side wall 13. The fourth side wall 14 can be connected to the first end wall 12 by welding, bonding or bolts, or the fourth side wall 14 can be integrally formed with the first end wall 12. When the first box body 10 has two first side walls 13 arranged opposite to each other along the second direction y, the fourth side wall 14 is located between the two first side walls 13, and one end of the fourth side wall 14 is connected to the first end wall 12, and the opposite ends of the fourth side wall 14 in the second direction y are respectively connected to the two first side walls 13.

[0248] In some embodiments, the fourth side wall 14 is formed with a portion for connecting with the first straight surface 250 of the third side wall 25, a portion for connecting with the second straight surface 251, and a mating surface for connecting with the transition surface 252. Figure 12-16 By setting the fourth side wall 14, the size of the third side wall 25 in the third direction z can be reduced, that is, the larger the size of the fourth side wall 14 in the third direction z, the smaller the size of the third side wall 25 in the first direction x can be.

[0249] In some embodiments, the first box body 10 can be an upper box body, and the second box body 20 can be a lower box body. The material cost and density of the upper box body can be lower than those of the lower box body. To this end, the fourth side wall 14 is set to increase the proportion of the first box body 10 in the battery 100, thereby effectively reducing the manufacturing cost of the battery 100 and improving the weight energy density of the battery 100.

[0250] For some other embodiments, see Fig.17 . Fig.17 Schematic diagram of the second box body 20 in some other embodiments of the present application. The dimension of one of the third side walls 25 in the third direction z is smaller than the dimension of the other third side wall 25 in the third direction z.

[0251] The size of the third side wall 25 in the third direction z can be regarded as the height of the third side wall 25. Since the heights of the two third side walls 25 are different, the height difference can be compensated by the first box body 10. The third side wall 25 with a larger size can be installed with components such as explosion-proof valves, water-cooled connectors or high and low voltage connectors. By reducing the size of the other third side wall 25, the size of the part of the first box body 10 corresponding to the third side wall 25 can be adaptively increased, for example, by setting the fourth side wall 14 or increasing the size of the fourth side wall 14, the proportion of the first box body 10 in the battery 100 is increased, thereby reducing the manufacturing cost of the battery 100 and increasing the weight energy density of the battery 100.

[0252] According to some embodiments of this application, see Figure 6 The battery 100 further includes a first fastener 50 , which penetrates the first sealing interface 103 along the second direction y and is locked into the interior of the second end wall 23 .

[0253] The first fastener 50 is a component that can connect the first box body 10 and the second box body 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. Figure 3 and Figure 6 One end of the first fastener 50 can pass through the first side wall 13 and the first seal 30 and be locked into the interior of the second end wall 23. The first fastener 50 can be a connecting member with an external thread, such as a bolt, a screw, etc. The first fastener 50 can also be a connecting member such as a pin, a rivet, etc.

[0254] In some embodiments, the first fastener 50 is a bolt, the first side wall 13 and the first seal 30 are respectively provided with through holes, and the second end wall 23 is formed with a threaded hole, and the bolt can pass through the through holes on the first side wall 13 and the first seal 30 and be locked into the threaded hole.

[0255] In some embodiments, the first fastener 50 may not be locked into the second end wall 23 , and the first fastener 50 may be locked into the second side wall 24 .

[0256] In the above solution, the second end wall 23 in the second direction y can provide a deeper locking depth for the first fastener 50. By arranging the first fastener 50 to penetrate the first sealing interface 103 and lock into the interior of the second end wall 23, the connection stability of the first box body 10 and the second box body 20 can be effectively improved, thereby improving the structural stability of the battery 100, so that the battery 100 has higher reliability.

[0257] According to some embodiments of the present application, see Figure 6 The portion of the first fastener 50 locked into the second end wall 23 is located on a side of the first surface 21 away from the closed space 102 .

[0258] like Figure 6 As shown, when the upper side of the first surface 21 is the closed space 102 , the lower side of the first surface 21 can be understood as the side of the first surface 21 away from the closed space 102 .

[0259] The portion of the first fastener 50 locked into the second end wall 23 is located on the side of the first surface 21 away from the enclosed space 102. It can be understood that the first end wall 12 can provide a deeper locking depth for the first fastener 50. For example, in the third direction z, a portion of the projection of the first fastener 50 can fall into the projection of the first surface 21.

[0260] In other embodiments, see Fig.18 , Fig.18 Schematic diagrams of the first fastener 50 and the first surface 21 in some other embodiments of the present application. The portion of the first fastener 50 locked into the second end wall 23 can also be located on the side of the first surface 21 close to the enclosed space 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 be locked into the edge of the first end wall 12 and located on the side of the first surface 21 close to the enclosed space 102.

[0261] In the above scheme, by setting the part where the first fastener 50 is locked into the second end wall 23 to be located on the side of the first surface 21 away from the enclosed space 102, on the one hand, the first fastener 50 does not occupy the enclosed space 102, which can improve the utilization rate of the enclosed space 102, improve the volume energy density of the battery 100, and also reduce the risk of interference with the battery cell 101 by the first fastener 50; 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, thereby improving the connection stability between the first box body 10 and the second box body 20, so that the battery 100 has higher reliability.

[0262] According to some embodiments of this application, see Figure 6 , along a direction perpendicular to the first surface 21 , a projection of the first fastener 50 at least partially overlaps with a projection of the battery cell 101 .

[0263] “Along the direction perpendicular to the first surface 21, the projection of the first fastener 50 at least partially overlaps with the projection of the battery cell 101” can be understood as that the first fastener 50 is locked to the second end wall 23 at a deeper depth, that is, the first fastener 50 extends along its locking direction, for example, along the second direction y, and the projection of the portion extending into the second end in the third direction z at least partially overlaps with the projection of the battery cell 101 located in the enclosed space 102.

[0264] In the above scheme, when projected in a direction perpendicular to the first surface 21, the projection of the first fastener 50 at least partially overlaps with the projection of the battery cell 101, so that the second end wall 23 provides a deeper locking depth for the first fastening, so that the first fastener 50 can be firmly locked to the second end wall 23, thereby improving the connection stability between the first box body 10 and the second box body 20, and making the battery 100 have higher reliability.

[0265] According to some embodiments of this application, see Figure 3 and Figure 7 The second box body 20 further 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 100 further includes a second fastener 51 (see Fig.12 ), the second fastener 51 is used to connect the third side wall 25 and the first box body 10, and the second fastener 51 is locked into the interior of the third side wall 25.

[0266] The second fastener 51 is a component capable of connecting the first box body 10 and the third side wall 25. In some embodiments, one end of the second fastener 51 can pass through the first box body 10 and be locked into the interior of the third side wall 25.

[0267] The second fastener 51 may be a connection member with external threads, such as a bolt, a screw, etc. The second fastener 51 may also be a connection member such as a pin, a rivet, etc.

[0268] In some embodiments, the second fastener 51 is a bolt, the first box body 10 and the second seal 40 are respectively provided with through holes, and the third side wall 25 is formed with a threaded hole, and the bolt can pass through the through holes on the first box body 10 and the second seal 40 and lock into the threaded hole of the third side wall 25.

[0269] See also Fig.12 The threaded holes may be provided on the flat surface so that the bolts can connect the first box body 10 and the third side wall 25. Fig.12 In the embodiment, the first straight surface 250, the second straight surface 251 and the inclined surface of the transition surface 252 are respectively provided with threaded holes.

[0270] In the above scheme, by setting the 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 box body 10 through the second locking member, a stable connection relationship can be established between the third side wall 25 and the first box body 10, thereby improving the connection stability between the first box body 10 and the second box body 20, and further improving the reliability of the battery 100.

[0271] According to some embodiments of this application, see Fig.19 , Fig.19 Schematic diagram of the specific structure of the battery 100 in other embodiments of the present application.

[0272] A first seal 30 is arranged between the first sealing surface 11 and the second sealing surface 22. Along the width direction of the first seal 30, one end of the first seal 30 is close to the closed space 102, and the other end of the first seal 30 is close to the outside of the battery 100. The width direction of the first seal 30 is parallel to the first surface 21.

[0273] The width direction of the first seal 30, the length direction of the first seal 30, and the thickness direction of the first seal 30 are perpendicular to each other. The thickness direction of the first seal 30 may be the arrangement direction of the first sealing surface 11 and the second sealing surface 22, for example, the thickness direction of the first seal 30 may be the second direction y.

[0274] In some embodiments, the length direction of the first seal 30 may be a direction intersecting the first surface 21, for example, the length direction of the first seal 30 may be the third direction z, and the width direction of the first seal 30 may be a direction parallel to the first surface 21, for example, the first direction x. Fig.19 The second box body 20 can be a frame 26, and the frame 26 has an opening at the end in the first direction x. The first box body 10 is inserted into the second box body 20 along the first direction x and closes the opening. The first sealing surface 11 is perpendicular to the first surface 21, and 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.

[0275] In the above scheme, by setting the width direction of the first seal 30 to be parallel to the first surface 21, for example, the width direction of the first seal 30 is parallel to the first direction x, so as to reduce the space occupied by the thickness of the first seal 30 in the second direction y while the first seal 30 plays a good sealing role, the space utilization of the battery 100 in the second direction y is improved, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.

[0276] According to some embodiments of this application, see Fig.19 The second box body 20 includes a surrounding frame 26, and the surrounding frame 26 is formed with an opening along the first direction x. The first box body 10 includes a plugging plate 15, and the plugging plate 15 is at least partially inserted into the interior of the surrounding frame 26 along the first direction x and closes the opening.

[0277] In some embodiments, the frame 26 may refer to a cavity inside the second box 20, and the cavity is surrounded by the wall of the second box 20. Fig.19 The surrounding frame 26 may be a cube with a cavity inside. An opening is formed at the end of the surrounding frame 26 in the first direction x, and the opening is connected to the inside of the surrounding frame 26 .

[0278] The first box body 10 may include a plug plate 15 , which is used to be connected to the surrounding frame 26 to close the opening so that the battery cell 101 is located inside the surrounding frame 26 , that is, in the closed space 102 .

[0279] “The plug plate 15 is at least partially inserted into the interior of the surrounding frame 26 along the first direction x” can be understood as, the plug plate 15 can be inserted into the surrounding frame 26 to close the opening, for example, the outer contour of the plug plate 15 corresponds to the opening, and the plug plate 15 is embedded in the opening to close the opening; it can also be understood as, part of the plug plate 15 is inserted into the surrounding frame 26 to connect with the surrounding frame 26 and close the opening.

[0280] In the above solution, the second box body 20 may include a frame 26, and the frame 26 may be formed with an opening at the end in the first direction x, and the battery cell 101 may be placed in the frame 26 through the opening. The first box body 10 may include a plug plate 15, and the plug plate 15 may be plugged into the inside of the frame 26 along the first direction x to close the opening, so that no additional space is occupied in the second direction y, that is, the maximum size of the outer contour of the battery 100 may be the maximum size of the outer contour of the frame 26, so that the battery 100 has a higher space utilization rate to accommodate more battery cells 101 or a smaller volume, so that the battery 100 has a higher volume energy density.

[0281] According to other embodiments of the present application, see Fig. 20 , Fig. 20Schematic diagram of the first box body 10 in some other embodiments of the present application. The first box body 10 further includes an extended wall plate 16, at least part of the first sealing surface 11 is disposed on the extended wall plate 16, the extended wall plate 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 extended wall plate 16 is at least partially located on the side of the sealing surface close to the battery cell 101.

[0282] The plug plate 15 may be a component of the first box body 10 for closing the opening of the surrounding frame 26. The surface of the plug plate 15 facing the closed space 102 is a covering surface.

[0283] The extended wall panel 16 is a component disposed on the plug plate 15. In some embodiments, the extended wall panel 16 is disposed on the side of the plug plate 15 in the second direction y, or the extended wall panel 16 is disposed on the cover surface of the plug plate 15 and is adjacent to the side of the plug plate 15 in the second direction y, or the extended wall portion is connected to the plug plate 15 and is adjacent to the side of the plug plate 15 in the second direction y.

[0284] In some embodiments, the first box 10 is inserted into the opening of the surrounding frame 26 along the first direction x, the plug plate 15 closes the opening of the surrounding frame 26, and the extended wall plate 16 passes through the opening and is connected to the surrounding frame 26. Alternatively, the first box 10 is inserted into the opening of the surrounding frame 26 along the first direction x, the plug plate 15 closes the opening of the surrounding frame 26, and the extended wall plate 16 is connected to the surrounding frame 26.

[0285] “At least a portion of the first sealing surface 11 is disposed on the extension wall plate 16” can be understood as that the extension wall plate 16 is formed with at least a portion of the first sealing surface 11 to be connected to the second sealing surface 22 of the second box body 20. In some embodiments, see Fig. 20 The plug plate 15 is provided with two extended wall plates 16, which can be spaced apart along the second direction y and respectively connected to the surrounding frame 26. The two extended wall plates 16 have two surfaces that are away from each other in the second direction y, and the two surfaces that are away from each other can respectively form the first sealing surface 11.

[0286] At least a portion of the first sealing surface 11 may be formed on the outer side surface of the extended wall plate 16, and the first sealing surface 11 may be connected to the inner wall surface of the surrounding frame 26. At least a portion of the first sealing surface 11 may also be formed on the inner side surface of the extended wall plate 16, and the first sealing surface 11 may be connected to the outer wall surface of the surrounding frame 26.

[0287] In some embodiments, a portion of the first sealing surface 11 may be disposed on the extension wall plate 16 , and another portion of the first sealing surface 11 may be disposed on the plug plate 15 .

[0288] See also Fig.19The sealing surface of the plug plate 15 may 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 may be connected to the hole wall of the opening. The hole wall of the opening may be the inner wall surface of the surrounding frame 26.

[0289] In the above scheme, on the one hand, by setting the extended 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 is effectively connected to the second sealing surface 22 of the second box body 20, thereby improving the connection stability between the first box body 10 and the second box body 20, and improving the reliability of the battery 100; on the other hand, the projection of the extended wall plate 16 along the second direction y is at least partially set to be located on the side of the cover surface close to the battery cell 101, which can avoid the extended wall plate 16 extending outward to increase the overall size of the battery 100 along the first direction x, so as to improve the space utilization of the battery 100 in the first direction x, and can accommodate more battery cells 101 or a smaller volume, so that the battery 100 has a higher volume energy density.

[0290] According to some embodiments of the present application, along the second direction y, the projection of the first sealing member 30 is at least partially located on a side of the sealing surface close to the battery cell 101 .

[0291] “The side of the cover surface close to 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.

[0292] “Along the second direction y, the projection of the first sealing member 30 is at least partially located on the side of the cover surface close to the battery cell 101 ” may be understood as that part of the first sealing member 30 may be located in the closed space 102 .

[0293] In the above scheme, the projection of the first seal 30 along the second direction y is at least partially set to be located on the side of the cover surface close to the battery cell 101. On the one hand, the sealing between the extended wall plate 16 and the second box body 20 can be improved; on the other hand, by setting part of the first seal 30 in the closed space 102, the first seal 30 can occupy as little space as possible outside the battery 100 in the first direction x, so as to improve the space utilization of the battery 100 in the first direction x, and can accommodate more battery cells 101 or a smaller volume, so that the battery 100 has a higher volume energy density.

[0294] According to some embodiments of the present application, along the second direction y, a projection of the first sealing member 30 at least partially overlaps with a projection of the battery cell 101 .

[0295] In some embodiments, the first sealing surface 11 may extend into the enclosed space 102, and along the second direction y, the projections of the first sealing surface 11 and the second sealing surface 22 may at least partially overlap with the projections of the battery cell 101, so that the first box body 10 and the second box body 20 have a larger connection area and sealing area. Correspondingly, the first sealing member 30 located between the first sealing surface 11 and the second sealing surface 22 also has a larger area.

[0296] In the above scheme, the projection of the first seal 30 along the second direction y is set to at least partially overlap with the projection of the battery cell 101, so that the first seal 30 does not occupy the space in the first direction x as much as possible, so as to improve the space utilization of the battery 100 in the first direction x, and can accommodate more battery cells 101 or a smaller volume, so that the battery 100 has a higher volume energy density.

[0297] According to some embodiments of the present application, the second sealing surface 22 is disposed on the inner wall surface of the surrounding 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 .

[0298] In some embodiments, for example Fig.19 The outer contour size of the plug plate 15 is smaller than the outer contour size of the surrounding frame 26, and the plug plate 15 can be embedded in the opening. In some of these embodiments, the first sealing surface 11 can be set on the outer wall surface of the plug plate 15, and the second sealing surface 22 can be set on the inner wall surface of the surrounding frame 26.

[0299] In other embodiments, the outer contour of the first box body 10 may be larger than the outer contour of the surrounding frame 26 , and the first box body 10 may be sleeved in the surrounding frame 26 . In these embodiments, the second sealing surface 22 may be disposed on the outer wall surface of the surrounding frame 26 .

[0300] In the above solution, the outer wall surface of the plug plate 15 can be provided with a first sealing surface 11 to connect with the inner wall surface of the surrounding frame 26, and there is no need to provide an additional connecting wall, which makes the box body processing simpler and saves processing costs.

[0301] According to some embodiments of this application, see Fig. 20 The battery 100 further includes a first connecting member 52 , which penetrates the first sealing interface 103 along the second direction y and is locked into the plug plate 15 .

[0302] The first connector 52 is a component that can connect the first box body 10 and the second box body 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 box body 20, 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 an external thread, such as a bolt screw, etc. The first connector 52 can also be a connecting member such as a pin, a rivet, etc.

[0303] In some embodiments, the first connecting member 52 is a bolt, the wall of the first box body 10 and the first seal 30 are respectively provided with through holes, and the plug plate 15 is formed with a threaded hole. The bolt can pass through the through holes on the wall of the first box body 10 and the first seal 30 and be locked into the threaded hole of the plug plate 15.

[0304] In some embodiments, the first connecting member 52 may not be locked into the plug plate 15 , but may be locked into the extension wall plate 16 .

[0305] In the above solution, by providing the first connecting member 52 to connect the plug plate 15 and the surrounding frame 26, the connection stability between the plug plate 15 and the surrounding frame 26 can be improved, thereby improving the structural stability of the battery 100, so that the battery 100 has higher reliability.

[0306] According to some embodiments of the present application, along the first direction x, a projection of the first connecting member 52 at least partially overlaps with a projection of the battery cell 101 .

[0307] The first direction x is the insertion direction of the plugging plate 15 . The first direction x may be perpendicular to the locking direction of the first connecting member 52 .

[0308] “Along the first direction x, the projection of the first connecting member 52 at least partially overlaps with the projection of the battery cell 101” can be understood as that the first connecting member 52 is locked to the plug plate 15 at a deeper depth, that is, the first connecting member 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 overlaps with the projection of the battery cell 101 located in the enclosed space 102.

[0309] In the above scheme, along the first direction x, the projection of the first connecting member 52 at least partially overlaps with the projection of the battery cell 101, so that the plug plate 15 provides a deeper locking depth for the first connecting member 52, so that the first connecting member 52 can be firmly locked to the plug plate 15, thereby improving the connection stability between the plug plate 15 and the second box body 20, so that the battery 100 has higher reliability.

[0310] According to some embodiments of this application, see Fig.21 , Fig.21 Schematic diagram of a battery pack 60 in some embodiments of the present application. The battery 100 includes at least one battery pack 60, and the battery pack 60 includes a plurality of battery cells 101 arranged in a group. The battery pack 60 is provided with a binding member 70, and the binding member 70 is used to bind the plurality of battery cells 101 arranged in a group.

[0311] The battery pack 60 may include a plurality of battery cells 101 arranged in groups, for example, the plurality of battery cells 101 are stacked along the thickness direction of the battery cells 101. The battery pack 60 may be provided with a binding member 70, which is used to bind the plurality of battery cells 101 arranged in groups so that the plurality of battery cells 101 form a relatively stable structure. In some embodiments, the binding member 70 may be a ring-shaped structure that can be placed around the periphery of the plurality of battery cells 101. In other embodiments, the binding member 70 may be a rope-shaped structure that is connected end to end to bind the plurality of battery cells 101.

[0312] In some embodiments, the battery pack 60 may include an end plate 80, a binding 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 arranged at both ends of the plurality of battery cells 101. The binding member 70 binds the two end walls and the plurality of battery cells 101 into one.

[0313] In some embodiments, the battery 100 has at least one battery pack 60 , for example, the enclosed space 102 in the battery 100 accommodates one battery pack 60 or a plurality of battery packs 60 . The plurality of battery packs 60 may refer to two or more battery packs 60 .

[0314] In the above solution, the 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 closed space 102 , thereby improving the utilization rate of the closed space 102 and further improving the energy density of the battery 100 .

[0315] According to some embodiments of this application, see Fig. 22 , Fig. 22 Schematic diagram of the first battery pack 61 and the second battery pack 62 in some embodiments of the present application.

[0316] The battery pack 60 includes a first battery pack 61 and a second battery pack 62 adjacently arranged along the second direction y. The first battery pack 61 is provided with a first bundling member 71, and the second battery pack 62 is provided with a second bundling member 72. Along the second direction y, a first portion 710 of the first bundling member 71 is provided on the side of the first battery pack 61 facing the second battery pack 62, and along the second direction y, a second portion 720 of the second bundling member 72 is provided on the side of the second battery pack 62 facing the first battery pack 61. Along the second direction y, the projection of the first portion 710 and the projection of the second portion 720 are staggered, and, along the direction perpendicular to the first surface 21, the projection of the first portion 710 and the projection of the second portion 720 at least partially overlap.

[0317] The battery 100 includes a plurality of battery packs 60, and the plurality of battery packs 60 may be arranged in the second direction y. In some embodiments, along the second direction y, the projections of the bundle 70 corresponding to each battery pack 60 may be mutually offset, so that in the second direction y, the portions of the bundle 70 between two adjacent battery packs 60 may be offset to reduce the space occupied by the bundle 70 in the second direction y. In some embodiments, in the third direction z (in the direction perpendicular to the first surface 21), the projections of the portions of the bundle 70 between two adjacent battery packs 60 may at least partially overlap, that is, in the third direction z, the portions of the bundle 70 between two adjacent battery packs 60 may share a portion of the space, so that the space occupied by the bundle 70 in the second direction y may be reduced.

[0318] In some embodiments, the first battery pack 61 and the second battery pack 62 can be understood as two battery packs 60 adjacent to each other in the second direction y among the multiple battery packs 60 of the battery 100. Fig. 22 , the first battery group 61 and the second battery group 62 are arranged in a second direction y, the first bundling member 71 corresponding to the first battery group 61 can bind the multiple battery cells 101 of the first battery group 61, and the second bundling member 72 corresponding to the second battery group 62 can bind the multiple battery cells 101 of the second battery group 62. The first portion 710 is a portion of the first bundling member 71, which is located between the multiple battery cells 101 of the first battery group 61 and the second battery group 62 in the second direction y. The second portion 720 is a portion of the second bundling member 72, which is located between the multiple battery cells 101 of the second battery group 62 and the first battery group 61 in the second direction y. In the second direction y, the projection of the first portion 710 and the projection of the second portion 720 are staggered, and in the third direction z, the projection of the first portion 710 and the projection of the second portion 720 can overlap each other.

[0319] In the above scheme, by staggering 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 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 bundling member 70 in the second direction y can be effectively reduced, and the utilization rate of the enclosed space 102 by the multiple battery packs 60 can be improved, thereby improving the volume energy density of the battery 100.

[0320] According to other embodiments of the present application, see Fig.23 , Fig.23 Schematic diagrams of a bundle 70 and a battery pack 60 in some other embodiments of the present application. There are multiple battery packs 60. The bundle 70 includes an outer frame 73 and a partition bar 74, wherein the partition bar 74 is disposed inside the outer frame 73 and divides the inside of the outer frame 73 into multiple sub-spaces, and each battery pack 60 is disposed in a sub-space.

[0321] The battery pack 60 may include a plurality of battery cells 101 arranged in groups, and the plurality of battery cells 101 are stacked along a thickness direction of the battery cells 101. In the battery 100, the number of the battery packs 60 is plural, for example, two, three, four or five.

[0322] The binding member 70 is used to bind multiple battery cells 101 arranged in groups. In some embodiments, the binding member 70 is used to bind multiple battery cells 101 arranged in groups, that is, to bind multiple battery packs 60. Fig.23 , the binding member 70 can bind three battery packs 60 .

[0323] The bundle 70 may include an outer frame 73 and a partition bar 74. A plurality of battery packs 60 are arranged in an array, for example Fig. 22 In the embodiment, three battery packs 60 are arranged along the width direction of the battery cell 101, and the outer frame 73 is arranged along the outer periphery of the three battery packs 60. The partition bar 74 is arranged inside the outer frame 73 and connected to the inner wall of the outer frame 73, dividing the inside of the outer frame 73 into a plurality of sub-spaces. Fig.23 In the embodiment, there are two separators 74, and the two separators 74 divide the interior of the outer frame 73 into three sub-spaces. The three battery packs 60 are respectively arranged in the corresponding sub-spaces.

[0324] In some embodiments, the outer frame 73 and the partition bar 74 may be integrally formed. In some embodiments, the partition bar 74 may be connected to the outer frame 73 by bonding, welding or other connection means.

[0325] In the above scheme, the bundling piece 70 includes an outer frame 73 and a partition bar 74, and the outer shell is divided into multiple sub-spaces by the partition bar 74, so that one bundling piece 70 can bundle multiple battery packs 60 at the same time, thereby reducing the occupation of the closed space 102 by the bundling piece 70, so that the closed space 102 can accommodate more battery cells 101, so that the battery 100 has a higher volume energy density.

[0326] According to some embodiments of this application, see Fig.23 The number of battery packs 60 is multiple, and the multiple battery packs 60 are arranged along the second direction y. The battery 100 further includes an end plate 80 , which is connected to the end surfaces of the multiple battery packs 60 in the first direction x, and the binding member 70 is connected to the end plate 80 .

[0327] In some embodiments, the battery pack 60 may include a plurality of battery cells 101 arranged in groups, and the plurality of battery cells 101 are stacked along the thickness direction of the battery cells 101. In the battery 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, such as side by side along the second direction y. In the stacking direction of the battery cells 101, the battery 100 is provided with end plates 80, and the two end plates 80 may be provided at both ends of the plurality of battery packs 60 in the stacking direction.

[0328] In some embodiments, the size of the end wall in the side-by-side direction of the multiple battery packs 60 may be greater than or equal to the size of the multiple battery packs 60 in the side-by-side direction. It can be understood that the end wall can cover the multiple battery packs 60 so that the multiple battery packs 60 can be fastened and bound together by the use of the bundling member 70.

[0329] See also Fig.23 , the wall of the end plate 80 is provided with a slot, and a portion of the tie 70 can be disposed in the slot. In some embodiments, each battery pack 60 corresponds to a tie 70, and a portion of the tie 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 tie 70, and a partition bar 74 in one tie 70 can be disposed in the slot to bind multiple battery packs 60 to the end wall.

[0330] In the above scheme, multiple battery packs 60 are arranged along the second direction y, and an end plate 80 is provided at one end of the multiple battery packs 60 in the first direction x. The bundling piece 70 is connected to the end plate 80, so that the multiple battery packs 60 can be effectively integrated into one, so that the layout of the multiple battery packs 60 is compact, the utilization rate of the enclosed space 102 is improved, and the battery 100 has a higher volume energy density.

[0331] According to some embodiments of this application, see Fig.24 , Fig.24 It is a simplified schematic diagram of the battery pack 60 and the second side wall 24 in some embodiments of the present application.

[0332] The second box body 20 includes a second end wall 23 and a second side wall 24, the first surface 21 is located on the second end wall 23, the first sealing surface 11 is located on the second side wall 24, and 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, and the binding 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, and the second side wall 24 is located on a side of the side portion 75 close to the first surface 21.

[0333] The second end wall 23 may be a main part of the second box 20, and has a first surface 21 for carrying the battery 100. In some embodiments, the first surface 21 is a surface of the second end wall 23 along the third direction z, and the first surface 21 is disposed toward the first box 10. In some embodiments, the second end wall 23 may be a plate-like structure, and the first surface 21 is a surface of the second end wall 23 in the third direction z, for example, the first surface 21 is an upper surface of the second end wall 23, and the lower surface of the second end wall 23 is a surface away from the enclosed space 102. In some other embodiments, the lower surface of the first end wall 12 is defined as a surface of the second end wall 23 away from the enclosed space 102, and the upper surface of the first end wall 12 is defined as a surface away from the lower surface of the first end wall 12, and the first surface 21 may be a portion of the upper surface of the second end wall 23, for example, a groove is formed on the upper surface of the second end wall 23, and the first surface 21 may be the bottom surface of the groove; for another example, a protrusion may be formed on the upper surface of the second end wall 23, and the first surface 21 may be the surface of the protrusion.

[0334] The second side wall 24 is a component disposed at the end of the second end wall 23 in the second direction y. For example, the second side wall 24 can be disposed on the side of the second end wall 23 in the second direction y. For another example, the second side wall 24 can be disposed on the upper surface of the second end wall 23 and adjacent to the side of the second end wall 23 in the second direction y. The second side wall 24 can be connected to the second end wall 23 by welding, bonding, bolting, etc., or the second side wall 24 can be integrally formed with the second end wall 23.

[0335] In some embodiments, the battery 100 may include one battery pack 60, and the battery pack 60 is disposed adjacent to the second side wall 24. Alternatively, in some embodiments, the battery 100 may include a plurality of battery packs 60, wherein one of the plurality of battery packs 60 is adjacent to the second side wall 24 in the second direction y, and the battery pack 60 may be a side battery pack 60.

[0336] The multiple battery cells 101 in the side wall battery pack 60 are bound by the binding member 70, and the binding member 70 has a side portion 75, and the side portion 75 is located on the side of the multiple battery cells 101 in the side wall battery pack 60 facing the second side wall 24. "The second side wall 24 is located on the side of the side portion 75 close to the first surface 21" can be understood as, in the third direction z, the second side wall 24 is located below the side portion 75, or in other words, along the first surface 21 toward the first box body 10, the viewing angle first passes through the second side wall 24 and then passes through the side portion 75.

[0337] In the above solution, the side battery pack 63 is disposed adjacent to the second side wall 24, and 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 side wall 24, so that the side battery pack 63 is stably disposed in the closed space 102. The second side wall 24 is located on the side of the side portion 75 close to the first surface 21, and it can also be understood that the size of the second side wall 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 closed space 102 under the constraint of the binding member 70.

[0338] According to some embodiments of this application, see Fig.24 Along the second direction y, the side portion 75 and the second side wall 24 are staggered, and, projected along a direction perpendicular to the first surface 21 , the side portion 75 and the second side wall 24 at least partially overlap.

[0339] In the above scheme, the projection of the side portion 75 in the second direction y and the projection of the second side wall 24 in the second direction y are staggered, and the projection of the side portion 75 in the direction perpendicular to the first surface 21 and the projection of the second side wall 24 in the direction perpendicular to the first surface 21 are at least partially overlapped, which can effectively reduce the space occupied by the bundling member 70 in the second direction y, improve the utilization rate of the enclosed space 102 by multiple battery packs 60, and thereby improve the volume energy density of the battery 100.

[0340] According to some embodiments of this application, see Fig.17 The second box body 20 includes a second end wall 23 , the first surface 21 is located on the second end wall 23 , and the battery 100 also includes a plurality of mounting portions 90 , and the plurality of mounting portions 90 are all located on a surface of the second end wall 23 facing away from the first surface 21 .

[0341] The mounting portion 90 is a component disposed on the second end wall 23. The mounting portion 90 is used to mount the battery 100 on the electrical device. The mounting portion 90 can be a connection structure such as a nut or a connection bracket disposed on the second end wall 23. In some embodiments, the number of mounting portions 90 can be multiple. In some embodiments, the mounting portion 90 can be an M8, M10, M12, or M16 threaded hole structure disposed on the second end wall 23.

[0342] In the above solution, a plurality of mounting portions 90 are provided on the second end wall 23 to enable the battery 100 to be stably mounted on the electrical device body, thereby stably providing electrical energy to the electrical device.

[0343] In some embodiments, the second box body 20 includes a second end wall 23, the first surface 21 is located on the second end wall 23, and a cross beam 91 (such as Fig.17 ), the crossbeam 91 can improve the structural strength of the second end wall 23. The mounting portion 90 can be set on the crossbeam 91. For example, the mounting portion 90 can be a threaded hole structure set on the crossbeam 91. The second end wall 23 is provided with a through hole corresponding to the mounting portion 90, so that the mounting member can be connected to the mounting portion 90 located on the crossbeam through the through hole of the second end wall 23.

[0344] According to some embodiments of the present application, along a direction perpendicular to the first surface 21 , projections of the plurality of mounting portions 90 are completely located within the projection range of the first surface 21 .

[0345] In the above scheme, by setting the projection of the mounting portion 90 along the direction perpendicular to the first surface 21 to completely fall within the projection range of the first surface 21, the mounting portion 90 does not occupy the space outside the first surface 21, thereby making the battery 100 compact and having a higher volume energy density.

[0346] According to some embodiments of the present application, the battery cell 101 is a blade battery cell.

[0347] In some embodiments, the blade battery cell may be a battery cell 101 having a relatively thin thickness and a relatively long length.

[0348] In some embodiments, along the length direction of the blade battery cell, the enclosed space 102 of the battery 100 can accommodate one blade battery cell 101 .

[0349] In the above solution, by setting the battery cell 101 in the battery 100 as a blade battery cell, the volume energy density of the battery 100 can be effectively improved.

[0350] According to some embodiments of the present application, there is also provided an electrical device, which includes a main body and a battery 100 as described in any one of the first aspects, and the battery 100 is used to provide electrical energy to the main body.

[0351] In the above solution, the electrical device uses the battery 100 with a higher energy density provided above, so it has a longer battery life and can meet more power demands.

[0352] According to some embodiments of the present application, the first sealing surface 11 and the second sealing surface 22 are parallel to the first direction x, and the first sealing surface 11 and the second sealing surface 22 intersect with the second direction y, and the first direction x and the second direction y are both parallel to the first surface 21 .

[0353] In the above scheme, by setting the first sealing interface 103 to intersect with the second direction y, and the second direction y is parallel to the first surface 21, the space occupied by the first sealing interface 103 in the second direction y can be reduced under the condition that the first sealing surface 11 and the second sealing surface 22 have good sealing performance, thereby improving the space utilization rate of the battery 100 in the second direction y, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100. For example, by setting the second sealing interface to intersect with the second direction y, the sealed connection between the first box body 10 and the second box body 20 can be achieved without providing a flange structure protruding along the second direction y, thereby improving the space utilization rate of the battery 100 in the second direction y, so as to accommodate more battery cells 101 or reduce the volume of the battery 100, thereby improving the volume energy density of the battery 100.

[0354] According to some embodiments of this application, see Fig.25 , Fig.25 Schematic diagram of an electrical device in some embodiments of the present application.

[0355] The main body 1001 includes a truck frame, which includes a cab 1002 , a compartment 1003 , and a battery rack 1004 located between the cab 1002 and the compartment 1003 . The battery rack 1004 is used to hold the battery 100 . The second direction y is the direction from the cab 1002 to the compartment 1003 .

[0356] The electric device may be a truck, which may include a truck frame and a battery 100. The truck frame includes a cab 1002, a carriage 1003, and a battery rack 1004 located between the cab 1002 and the carriage. The battery rack 1004 may hold the battery 100, and the number of the battery 100 may be one or more.

[0357] In the above scheme, the second direction y is the direction from the cab 1002 to the carriage 1003. For this reason, the electrical equipment adopts the battery 100 provided above, and can reasonably utilize the space between the cab 1002 and the carriage 1003. By making the first sealing interface 103 on the battery 100 intersect with the first surface 21, the space occupied by the battery 100 as a whole along the second direction y can be reduced without affecting the sealing performance of the battery 100, and further the carriage 1003 occupies more space in the second direction y, thereby loading more cargo.

[0358] According to some embodiments of this application, see Fig.26 , Fig.26 The main body 1001 includes a tractor frame, which includes a cab 1002, a traction seat 1005, and a battery rack 1004 located between the cab 1002 and the traction seat 1005. The battery rack 1004 is used to hold the battery 100. The second direction y is the direction from the cab 1002 to the traction seat 1005.

[0359] The electric device may be a tractor, which may include a tractor frame and a battery 100. The tractor frame includes a cab 1002, a traction seat 1005, and a battery rack 1004 located between the cab 1002 and the traction seat 1005. The battery rack 1004 may contain one or more batteries 100. The traction seat 1005 may be used to tow a carriage.

[0360] In the above scheme, the second direction y is the direction from the cab 1002 to the traction seat 1005. For this reason, the electrical equipment adopts the battery 100 provided above, and can reasonably utilize the space between the cab 1002 and the traction seat 1005. By making the first sealing interface 103 on the battery 100 intersect with the first surface 21, the space occupied by the battery 100 as a whole along the second direction y can be reduced without affecting the sealing performance of the battery 100. Further, the traction seat 1005 can be arranged closer to the cab, so that more space of the frame in the second direction y can be used to mount the carriage, thereby loading more cargo; or, the part of the space saved along the second direction y can be used to improve the battery's own endurance.

[0361] According to some embodiments of this application, see Fig. 27 and Fig.28 , Fig. 27 This is a schematic diagram of an electrical device in some embodiments of the present application. Fig.28Schematic diagram of a vehicle frame and a battery in some embodiments of the present application. The body includes a frame, the frame includes a vehicle frame 1006, and along the width direction of the frame, the battery 100 is installed on at least one side of the vehicle frame 1006, and the second direction y is the width direction of the vehicle frame.

[0362] The width direction of the frame can be perpendicular to the driving direction of the vehicle, and the width direction of the frame is perpendicular to the length direction of the frame. Along the length direction of the frame, a cab 1002 is arranged at one end of the frame.

[0363] The electric device may include a commercial vehicle, for example, a heavy truck. The frame of the heavy truck has a vehicle beam 1006, for example, the vehicle beam 1006 is a pair of longitudinal beams 1007. The longitudinal beams 1007 are arranged at intervals along the width direction of the vehicle, that is, the two longitudinal beams 1007 are arranged at intervals along the second direction y. The longitudinal beams 1007 extend along the length direction of the vehicle.

[0364] In some embodiments, the battery 100 may be disposed on a side of one of the longitudinal beams 1007 that is away from the other longitudinal beam 1007 . In some embodiments, the battery may also be disposed between the two longitudinal beams 1007 .

[0365] In the above scheme, the second direction y is the width direction of the vehicle frame 1006. For this reason, the electrical equipment adopts the battery 100 provided above, and can reasonably utilize the space in the width direction of the vehicle frame 1006. By making the first sealing interface 103 on the battery 100 intersect with the first surface 21, the space occupied by the battery 100 as a whole along the second direction y can be reduced without affecting the sealing performance of the battery 100. When the arrangement space of the battery 100 as a whole along the width direction of the vehicle frame 1006 is limited, the space saved by the first sealing interface 103 through the above setting can be used to improve the battery life of the battery 100 itself.

[0366] According to some embodiments of the present application, the present application also provides a battery 100, see Figure 2 Fig.13The battery 100 includes a first box body 10, a second box body 20 and a battery cell 101. The first box body 10 is the upper box body of the battery 100, the second box body 20 is the lower box body of the battery 100, the second box body 20 and the first box body 10 are connected to each other to enclose a closed space 102, and the battery cell 101 is arranged in the closed space 102. The first box body 10 includes a first end wall 12 and two first side walls 13. The first end wall 12 can be the top wall of the battery 100, and the two first side walls 13 are arranged relative to the first end wall 12 along the second direction y (the width direction of the battery 100). The second box body 20 includes a second end wall 23, two second side walls 24 and two third side walls 25. The second end wall 23 can be the bottom wall of the battery 100, and the two second side walls 24 are respectively arranged at the two ends of the second end wall 23 in the second direction y. The two third side walls 25 are respectively arranged at the two ends of the second end wall 23 in the first direction x.

[0367] The inner surface of the first side wall 13 facing the second side wall 24 forms a first sealing surface 11, the second sealing surface 22 is formed on the outer surface of the second side wall 24 facing the first side wall 13 and on the side of the second end wall 23 facing the first side wall 13, a first seal 30 is arranged between the first sealing surface 11 and the second sealing surface 22, a first fastener 50 passes through the first side wall 13, the first fastener 50 and is locked into the second end wall 23 to fasten the first seal 30 between the first sealing surface 11 and the second sealing surface 22, and a first sealing interface 103 is formed between the first sealing surface 11 and the second sealing surface 22.

[0368] The third side wall 25 has a first straight surface 250, a second straight surface 251, and a transition surface 252 disposed between the first straight surface 250 and the second straight surface 251. The first straight surface 250, the second straight surface 251, and the transition surface 252 are connected to the first box body 10, and a second sealing member 40 is disposed between the first straight surface 250, the second straight surface 251, the transition surface 252, and the first box body 10, and the first sealing member 30 and the second sealing member 40 are integrally formed.

[0369] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: Battery cells; A first box body, wherein the first box body comprises a first sealing surface; A second box body, comprising a first surface and a second sealing surface, wherein the first surface is used to carry the battery cell, the first box body and the second box body are together enclosed to form a closed space for accommodating the battery cell, and the first sealing surface cooperates with the second sealing surface to form a first sealing interface for sealing the closed space; The first sealing interface intersects the first surface.

2. The battery according to claim 1, characterized in that The first sealing surface and the second sealing surface are parallel to a first direction, and the first sealing surface and the second sealing surface intersect with a second direction, and the first direction and the second direction are both parallel to the first surface.

3. The battery according to claim 2, characterized in that A first sealing member is disposed between the first sealing surface and the second sealing surface. The first sealing member is located on a side of the first sealing surface or the second sealing surface that is away from the closed space and close to the closed space.

4. The battery according to claim 3, characterized in that Along a width direction of the first sealant, one end of the first sealant is close to the closed space, the other end of the first sealant is close to the outside of the battery, and the width direction of the first sealant intersects with the first surface.

5. The battery according to claim 3, characterized in that The second box body 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 arranged on the second side wall, the second side wall is connected to the end of the second end wall in the second direction, and the projection of the second side wall along the second direction is at least partially located on the side of the first surface close to the battery cell.

6. The battery according to claim 5, characterized in that Along the second direction, a projection of the first sealing member is at least partially located on a side of the first surface close to the battery cell.

7. The battery according to claim 6, characterized in that Along the second direction, a projection of the first sealing member and a projection of the battery cell at least partially overlap.

8. The battery according to claim 3, characterized in that The second box body includes a second end wall, the first surface is located on the second end wall, and the second sealing surface is a side wall surface of the second end wall that is perpendicular to the second direction.

9. The battery according to claim 5, characterized in that The first box body includes a first end wall and a first side wall connected to each other, the first end wall includes a first end wall surface arranged opposite to the first surface, at least a portion of the first sealing surface is arranged on the first side wall, and at least a portion of the first side wall is located on a side of the first end wall surface close to the first surface.

10. The battery according to claim 9, characterized in that At least a portion of the first side wall is located on a side of the first surface away from the battery cell.

11. The battery according to claim 9, characterized in that The second box body further includes a third side wall, which is disposed at an end of the second end wall in the first direction, and the third side wall extends toward the first box body and is connected to the first box body.

12. The battery according to claim 11, characterized in that The third side wall includes a first flat surface facing away from the first surface and a second flat surface intersecting the second direction, the first flat surface is used for sealing connection with the first end wall, and the second flat surface is used for sealing connection with the first side wall.

13. The battery according to claim 12, characterized in that The battery further includes a second sealant disposed between the third side wall and the first housing.

14. The battery according to claim 13, characterized in that The first straight surface and the second straight surface are connected by a transition surface, and the transition surface includes an inclined surface and / or an arcuate surface. A matching surface is formed at the connection between the first end wall and the first side wall, and the matching surface is arranged corresponding to the transition surface.

15. The battery according to claim 14, characterized in that The second seal includes a first sub-seal, a second sub-seal and a third sub-seal. The first sub-seal is arranged between the first flat surface and the first end wall, the second sub-seal is arranged between the second flat surface and the first side wall, and the third sub-seal is arranged between the transition surface and the matching surface.

16. The battery according to claim 5, characterized in that The battery further includes a first fastener, which is arranged along the second direction through the first sealing interface and locked into the interior of the second end wall.

17. The battery according to claim 16, characterized in that The portion of the first fastener locked into the second end wall is located on a side of the first surface away from the closed space.

18. The battery according to claim 16, characterized in that Along a direction perpendicular to the first surface, a projection of the first fastener at least partially overlaps with a projection of the battery cell.

19. The battery according to claim 16, characterized in that The second box body also includes a third side wall, which is arranged 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 side wall and the first box body, and the second fastener is locked into the interior of the third side wall.

20. The battery according to claim 2, characterized in that A first seal is arranged between the first sealing surface and the second sealing surface. Along the width direction of the first seal, one end of the first seal is close to the enclosed space, and the other end of the first seal is close to the outside of the battery. The width direction of the first seal is parallel to the first surface.

21. The battery according to claim 20, characterized in that The second box body includes a surrounding frame, and the surrounding frame is formed with an opening along the first direction. The first box body includes a plugging plate, and the plugging plate is at least partially inserted into the interior of the surrounding frame along the first direction and closes the opening.

22. The battery according to claim 21, characterized in that The first box body further comprises an extended wall plate, at least a portion of the first sealing surface is disposed on the extended wall plate, the extended wall plate is disposed at an end of the plug plate in the second direction, and the plug plate has a sealing surface facing the battery cell; Projected along the second direction, the projection of the extended wall plate is at least partially located on a side of the cover surface close to the battery cell.

23. The battery according to claim 22, characterized in that Along the second direction, a projection of the first sealing member is at least partially located on a side of the covering surface close to the battery cell.

24. The battery according to claim 21, characterized in that Along the second direction, a projection of the first sealing member at least partially overlaps with a projection of the battery cell.

25. The battery according to claim 21, characterized in that The second sealing surface is arranged on the inner wall surface of the surrounding frame, and at least a part of the first sealing surface is arranged on the outer wall surface of the plug plate.

26. The battery according to claim 21, characterized in that The battery further includes a first connector, which is arranged along the second direction through the first sealing interface and locked into the plug plate.

27. The battery according to claim 26, characterized in that Along the first direction, a projection of the first connecting member at least partially overlaps with a projection of the battery cell.

28. The battery according to claim 2, characterized in that The battery includes at least one battery pack, the battery pack includes a plurality of battery cells arranged in a group, and the battery pack is provided with a binding member, the binding member is used to bind the plurality of battery cells arranged in a group.

29. The battery according to claim 28, characterized in that The battery pack includes a first battery pack and a second battery pack adjacently arranged along the second direction; the first battery pack is provided with a first bundling member, the second battery pack is provided with a second bundling member, a first portion of the first bundling member is provided on a side of the first battery pack facing the second battery pack along the second direction, and a second portion of the second bundling member is provided on a side of the second battery pack facing the first battery pack along the second direction; Along the second direction, the projection of the first portion and the projection of the second portion are staggered, and along a direction perpendicular to the first surface, the projection of the first portion and the projection of the second portion at least partially overlap.

30. The battery according to claim 28, characterized in that The number of the battery packs is multiple; The binding member includes an outer frame and a partition bar. The partition bar is arranged inside the outer frame and divides the inside of the outer frame into a plurality of sub-spaces. Each of the battery packs is respectively arranged in the sub-space.

31. The battery according to claim 28, characterized in that There are multiple battery packs, and the multiple battery packs are arranged along the second direction; The battery further includes an end plate connected to end surfaces of the plurality of battery groups in the first direction, and the binding member is connected to the end plate.

32. The battery according to claim 28, characterized in that The second box body comprises a second end wall and a second side wall, the first surface is located on the second end wall, the first sealing surface is located on the second side wall, and the second side wall is connected to an end of the second end wall in the second direction; The battery pack includes a side battery pack arranged adjacent to the second side wall in the second direction, the bundling member includes a side portion, the side portion is arranged on the side of the side battery pack facing the second side wall in the second direction, and the second side wall is located on a side of the side portion close to the first surface.

33. The battery according to claim 32, characterized in that Along the second direction, the side portion and the second side wall are staggered, and when projected along a direction perpendicular to the first surface, the side portion and the second side wall at least partially overlap.

34. The battery according to any one of claims 1 to 33, characterized in that The second box body includes a second end wall, the first surface is located on the second end wall, and the battery further includes a plurality of mounting portions, and the plurality of mounting portions are all located on a surface of the second end wall facing away from the first surface.

35. The battery according to claim 34, characterized in that Along a direction perpendicular to the first surface, projections of the plurality of mounting portions are completely located within a projection range of the first surface.

36. The battery according to claim 1, characterized in that The battery cell is a blade battery cell.

37. An electrical device, characterized in that: The electrical device comprises a main body and a battery as described in any one of claims 1 to 36, wherein the battery is used to provide electrical energy to the main body.

38. The electrical device according to claim 37, characterized in that: The first sealing surface and the second sealing surface are parallel to a first direction, and the first sealing surface and the second sealing surface intersect with a second direction, and the first direction and the second direction are both parallel to the first surface.

39. The electrical device according to claim 38, characterized in that: The main body includes a truck frame, which includes a cab, a compartment and a battery rack located between the cab and the compartment, wherein the battery rack is used to hold the battery, and the second direction is the direction from the cab to the compartment.

40. The electrical device according to claim 38, characterized in that: The body comprises a tractor frame, which comprises a cab, a fifth wheel and a battery rack located between the cab and the fifth wheel, wherein the battery rack is used to hold the battery, and the second direction is the direction from the cab to the fifth wheel.

41. The electrical device according to claim 38, characterized in that: The body includes a frame, the frame includes a vehicle beam, and the battery is installed on at least one side of the vehicle beam along the width direction of the frame. The second direction is the width direction of the vehicle beam.

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