Battery and electric device

Abstract

This application provides a battery and an electrical device. The battery includes a battery cell, a first housing, and a second housing. The first housing includes a first sealing surface. The second housing includes a first surface and a second sealing surface. The first surface is used to support the battery cell. The first housing and the second housing together enclose a closed space for accommodating the battery cell. The first sealing surface and the second sealing surface cooperate to seal the closed space. The first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface. This reduces the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with both the first and second sealing surfaces, thereby improving the space utilization rate of the battery in this direction, which is parallel to the first surface and intersects with both the first and second sealing surfaces, so as to accommodate more battery cells or reduce the volume of the battery, thereby increasing the volumetric energy density of the battery.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application 202311027215.8 entitled "Battery and Electrical Device", filed on August 15, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and more specifically, to a battery and an electrical device. Background Technology

[0004] Batteries are widely used in electronic devices, vehicles, power tools, drones, energy storage devices, and other fields. As application environments and conditions become increasingly complex, higher demands are being placed on battery energy density. Summary of the Invention

[0005] This application provides a battery and an electrical device to improve the energy density of the battery.

[0006] In a first aspect, embodiments of this application provide a battery, the battery including a battery cell, a first housing and a second housing; the first housing includes a first sealing surface; the second housing includes a first surface and a second sealing surface, the first surface being used to support the battery cell; the first housing and the second housing together enclose a closed space to accommodate the battery cell, the first sealing surface and the second sealing surface cooperating to seal the closed space; the first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.

[0007] In the above technical solution, both the first sealing surface and the second seal intersect with the first surface. That is, the first sealing surface is not parallel to the first surface, and the second sealing surface is not parallel to the first surface. Under the same sealing width, compared with the case where the first sealing surface and the second sealing surface are parallel to the first surface, the fact that both the first sealing surface and the second sealing surface intersect with the first surface can reduce the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with the first sealing surface and the second seal. This improves the space utilization rate of the battery in the direction parallel to the first surface and intersecting with both the first sealing surface and the second seal, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volumetric energy density of the battery.

[0008] In some embodiments of the first aspect of this application, at least one of the first sealing surface and the second sealing surface is perpendicular to the first surface.

[0009] In the above technical solution, at least one of the first sealing surface and the second sealing surface is perpendicular to the first surface, which can reduce the space occupied by the one of the first sealing surfaces perpendicular to the first surface in the direction parallel to the first surface and intersecting with the first and second sealing surfaces. This makes full use of the space in the direction perpendicular to the first surface, which is beneficial to improving the volumetric energy density of the battery.

[0010] In some embodiments of the first aspect of this application, one of the first sealing surface and the second sealing surface is perpendicular to the first surface, and the other of the first sealing surface and the second sealing surface is not perpendicular to the first surface and intersects with it.

[0011] In the above technical solution, one of the first sealing surface and the second sealing surface is perpendicular to the first surface, while the other is not perpendicular to the first surface but intersects with it. This not only reduces the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with both the first and second sealing surfaces, thereby improving the space utilization rate of the battery in the direction parallel to the first surface and intersecting with both the first and second sealing surfaces, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volumetric energy density of the battery, but also makes full use of the space in the direction perpendicular to the first surface, further improving the volumetric energy density of the battery.

[0012] In some embodiments of the first aspect of this application, one of the first sealing surface and the second sealing surface that is perpendicular to the first surface is located on the side of the other away from the enclosed space.

[0013] In the above technical solution, the first sealing surface and the second sealing surface that are perpendicular to the first surface are located on the side of the other that is away from the enclosed space. Therefore, the first sealing surface and the second sealing surface that are not perpendicular to the first surface are set close to the enclosed space, which can make full use of the internal space of the box formed by the first box and the second box, reduce the external size of the battery, and help improve the volumetric energy density of the battery.

[0014] In some embodiments of the first aspect of this application, the second sealing surface is perpendicular to the first surface, and the second sealing surface is located on the side of the first sealing surface away from the enclosed space.

[0015] In the above technical solution, the second sealing surface is perpendicular to the first surface and is located on the side of the first sealing surface away from the enclosed space. This not only allows the second sealing surface to utilize the space in the direction perpendicular to the first surface, but also facilitates the assembly of the first and second housings.

[0016] In some embodiments of the first aspect of this application, the first housing includes a first end wall and a first side wall connected to each other, and the first sealing surface is disposed on the first side wall; the second housing includes a second end wall and a second side wall connected to each other, the second end wall having the first surface and being disposed opposite to the first end wall along a first direction, the first direction being perpendicular to the first surface, and the second sealing surface being disposed on the second side wall.

[0017] In the above technical solution, the first housing includes a first end wall and a first side wall that are connected to each other, and the second housing includes a second end wall and a second side wall that are connected to each other. On the one hand, this facilitates the formation of a closed space by the first housing and the second housing to accommodate a single battery cell. On the other hand, the first sealing surface is disposed on the first side wall and the second sealing surface is disposed on the second side wall, which allows the areas of the first sealing surface and the second sealing surface to be large, so as to form a good connection relationship and good sealing performance with the second sealing surface, thereby giving the battery high reliability. It also makes the structure of the first housing and the second housing simple and easy to manufacture.

[0018] In some embodiments of the first aspect of this application, the first sealing surface is not perpendicular to the first surface but intersects with it, and the first sidewall and the first endwall are connected at an obtuse angle; or, the second sealing surface is not perpendicular to the first surface but intersects with it, and the second sidewall and the second endwall are connected at an obtuse angle.

[0019] In the above technical solution, the first sidewall and the first endwall are connected at an obtuse angle, so that the first sealing surface and the first surface do not intersect perpendicularly. This facilitates the filling of sealant or the placement of a sealing gasket in the space between the first and second sealing surfaces, which is beneficial for forming a reliable sealing relationship between the first and second housings. Similarly, the second sidewall and the second endwall are connected at an obtuse angle, so that the second sealing surface and the first surface do not intersect perpendicularly. This also facilitates the filling of sealant or the placement of a sealing gasket in the space between the first and second sealing surfaces, which is beneficial for forming a reliable sealing relationship between the first and second housings.

[0020] In some embodiments of the first aspect of this application, the first sealing surface and the second sealing surface together form a sealant-containing space for accommodating sealant.

[0021] In the above technical solution, the first sealing surface and the second sealing surface together form a space for accommodating the sealant. By setting the sealant in the space, not only can the sealing performance of the enclosed space be improved, but the first sealing surface and the second sealing surface can also be bonded together by the sealant, thereby improving the connection stability between the first housing and the second housing. Since the sealant bonds the first sealing surface and the second sealing surface, there is no need to set other connecting parts to connect the first housing and the second housing, reducing the steps in battery assembly and saving costs.

[0022] In some embodiments of the first aspect of this application, the projection of the adhesive space along the first direction at least partially overlaps with the projection of the battery cell.

[0023] In the above technical solution, when projected along the first direction, the projection of the adhesive space at least partially overlaps with the projection of the battery cell. Thus, the adhesive space can occupy as little space as possible in the direction parallel to the first surface, while making full use of the space in the direction perpendicular to the first surface. Under the condition of occupying as little space as possible in the direction parallel to the first surface, the adhesive space has a large sealing area, thereby improving the sealing performance between the first sealing surface and the second sealing surface, and making the battery have high reliability.

[0024] In some embodiments of the first aspect of this application, the battery further includes an adhesive-blocking structure disposed at the junction of the enclosed space and the adhesive-containing space.

[0025] In the above technical solution, a sealant-blocking structure is provided at the junction of the enclosed space and the adhesive space. The sealant-blocking structure can limit the overflow of the sealant in the adhesive space into or out of the enclosed space, reduce sealant waste, and enable the battery to have better sealing performance, which is beneficial to improving the sealing reliability of the battery.

[0026] In some embodiments of the first aspect of this application, the adhesive barrier structure is disposed on the second sidewall.

[0027] In the above technical solution, the adhesive-blocking structure is set on the second sidewall to reduce the risk of interference between the adhesive-blocking structure and the battery cell.

[0028] In some embodiments of the first aspect of this application, the adhesive barrier structure is a first protrusion protruding from the inner surface of the second sidewall, and the first housing is supported on the first protrusion.

[0029] In the above technical solution, the sealant-blocking structure is a first protrusion protruding from the inner surface of the second side wall. It can not only prevent the sealant in the adhesive-containing space from overflowing into the closed space, but also support the first box and restrict the first box from moving towards the second box, so as to keep the closed space larger in size.

[0030] In some embodiments of the first aspect of this application, the adhesive barrier structure is a groove provided on the inner surface of the second sidewall, and a portion of the first housing is located within the groove.

[0031] In the above technical solution, the sealant blocking structure is a groove set on the inner surface of the second side wall. It can not only prevent the sealant in the adhesive space from overflowing into the closed space, but also reduce the weight of the second box. Such a sealant blocking structure will not interfere with the structure in the closed space.

[0032] In some embodiments of the first aspect of this application, the second sidewall is bent from the end of the second end wall along the first direction toward the side away from the battery cell to form a recess, and the first sidewall is inserted into the recess; or, the first sidewall is bent from the end of the first end wall along the first direction toward the side away from the battery cell to form a recess, and the second sidewall is inserted into the recess; the recess is used to accommodate sealant.

[0033] In the above technical solution, the second sidewall is bent from the end of the second endwall in the first direction toward the side away from the battery cell to form a recess. This recess can be formed without reducing the strength of the second sidewall. The first sidewall is inserted into the recess, which can limit the first sidewall and improve the stability of the first housing and the second housing.

[0034] In some embodiments of the first aspect of this application, the projection of the recess along the first direction at least partially overlaps with the projection of the battery cell.

[0035] In the above technical solution, when projected along the first direction, the projection of the recess at least partially overlaps with the projection of the battery cell, allowing the battery cell to fully utilize the enclosed space, thereby increasing the energy density of the battery cell. The battery cell also serves to prevent the sealant in the recess from overflowing into the enclosed space.

[0036] In some embodiments of the first aspect of this application, both the first sealing surface and the second sealing surface are perpendicular to the first surface.

[0037] In the above technical solution, both the first sealing surface and the second sealing surface are perpendicular to the first surface. Compared with the case where the first sealing surface and the second sealing surface are parallel to the first surface, the fact that both the first sealing surface and the second sealing surface are perpendicular to the first surface minimizes the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface. This allows the first sealing surface and the second sealing surface to make full use of the space in the direction perpendicular to the first surface, thereby improving the space utilization rate of the battery in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby improving the volumetric energy density of the battery.

[0038] In some embodiments of the first aspect of this application, the first housing includes a first end wall and a first side wall connected to each other, and the first sealing surface is disposed on the first side wall; the second housing includes a second end wall and a second side wall connected to each other, the second end wall having the first surface and being disposed opposite to the first end wall along a first direction, the first direction being perpendicular to the first surface, and the second sealing surface being disposed on the second side wall.

[0039] In the above technical solution, the first housing includes a first end wall and a first side wall that are connected to each other, and the second housing includes a second end wall and a second side wall that are connected to each other. On the one hand, this facilitates the formation of a closed space by the first housing and the second housing to accommodate a single battery cell. On the other hand, the first sealing surface is disposed on the first side wall and the second sealing surface is disposed on the second side wall, which allows the areas of the first sealing surface and the second sealing surface to be large, so as to form a good connection relationship and good sealing performance with the second sealing surface, thereby giving the battery high reliability. It also makes the structure of the first housing and the second housing simple and easy to manufacture.

[0040] In some embodiments of the first aspect of this application, a sealant is filled between the first sealing surface and the second sealing surface.

[0041] In the above technical solution, the space between the first sealing surface and the second sealing surface is filled with sealant, which not only improves the sealing performance of the enclosed space, but also enhances the connection stability between the first housing and the second housing by bonding the first sealing surface and the second sealing surface with sealant. Since the first sealing surface and the second sealing surface are bonded with sealant, there is no need to set up other connecting parts to connect the first housing and the second housing, which reduces the steps of battery assembly and saves costs.

[0042] In some embodiments of the first aspect of this application, the projection of the sealant along a second direction at least partially coincides with the projection of the battery cell, the second direction being parallel to the first surface and intersecting the first sidewall.

[0043] In the above technical solution, when projected along the second direction, the projection of the sealant at least partially overlaps with the projection of the battery cell, which can reduce the space occupied by the sealant in other directions intersecting with the second direction. The sealant can make full use of the space of the battery in the second direction, thereby helping to improve the energy density of the battery.

[0044] In some embodiments of the first aspect of this application, the battery further includes a sealant structure disposed in the enclosed space near the first sealing surface and the second sealing surface.

[0045] In the above technical solution, a sealant-blocking structure is provided in the enclosed space near the first sealing surface and the second sealing surface. The sealant-blocking structure can limit the overflow of sealant in the sealant-containing space into the enclosed space, reduce sealant waste, and enable the battery to have better sealing performance, which is beneficial to improving the sealing reliability of the battery.

[0046] In some embodiments of the first aspect of this application, the adhesive barrier structure is disposed on the first surface.

[0047] In the above technical solution, the adhesive-blocking structure is disposed on the first surface, which facilitates the placement of the adhesive-blocking structure.

[0048] In some embodiments of the first aspect of this application, the adhesive barrier structure is a second protrusion protruding from the first surface, and a portion of the first housing is located between the second sidewall and the second protrusion.

[0049] In the above technical solution, the sealant-blocking structure is a second protrusion protruding from the first surface. A portion of the first housing is located between the second sidewall and the second protrusion. The second protrusion can not only prevent the sealant between the first sealing surface and the second sealing surface from overflowing into the enclosed space, but also limit the deformation of the first housing in the direction away from the second sidewall, so that the enclosed space maintains a large size and reduces the risk of interference between the first housing and the structure in the enclosed space due to the deformation of the first housing in the direction away from the second sidewall.

[0050] In some embodiments of the first aspect of the application, the first housing includes a first end wall and a first side wall connected to each other, the first sealing surface is disposed on the first side wall, the second housing includes a second end wall, the first end wall and the second end wall are arranged opposite to each other in a first direction, the first direction being perpendicular to the first surface; the second end wall is provided with a receiving groove, the second sealing surface is disposed on the groove wall of the receiving groove, the first side wall is inserted into the receiving groove, and the receiving groove is filled with sealant.

[0051] In the above technical solution, the first sidewall is inserted into the receiving groove, which not only limits the first sidewall but also restricts its deformation towards or away from the enclosed space. The receiving groove is filled with sealant, which not only improves the sealing performance but also connects the first and second housings within the receiving groove. This eliminates the need for other connectors to connect the first and second housings, reducing battery assembly steps and saving costs.

[0052] In some embodiments of the first aspect of this application, the projection of the receiving groove along the first direction at least partially overlaps with the projection of the battery cell.

[0053] In the above technical solution, when projected along the first direction, the projection of the receiving groove at least partially overlaps with the projection of the battery cell, allowing the battery cell to fully utilize the enclosed space, thereby increasing the energy density of the battery cell. The battery cell also serves to prevent the sealant in the receiving groove from overflowing into the enclosed space.

[0054] Secondly, embodiments of this application provide an electrical device, including the battery provided in any of the above embodiments.

[0055] In the above technical solution, the power-consuming device uses the battery with high energy density provided above, thus having a longer battery life and meeting more power consumption needs. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0058] Figure 2 An exploded view of a battery provided in some embodiments of this application;

[0059] Figure 3 This is a schematic diagram showing the first and second boxes after they are closed, as provided in some embodiments of this application.

[0060] Figure 4 for Figure 3 A schematic diagram showing that sealant is filled between the first and second sealing surfaces.

[0061] Figure 5 A schematic diagram showing the first and second boxes after being closed, as provided in other embodiments of this application;

[0062] Figure 6 for Figure 5 A schematic diagram showing that sealant is filled between the first and second sealing surfaces.

[0063] Figure 7 A schematic diagram showing the first and second boxes after being closed, provided for some embodiments of this application;

[0064] Figure 8 for Figure 7 A schematic diagram showing that sealant is filled between the first and second sealing surfaces.

[0065] Figure 9 A cross-sectional view of a battery provided for some embodiments of this application;

[0066] Figure 10 Cross-sectional views of batteries provided for other embodiments of this application;

[0067] Figure 11 A schematic diagram showing the first and second boxes after being closed, provided for some embodiments of this application;

[0068] Figure 12 A cross-sectional view of a battery provided for some other embodiments of this application;

[0069] Figure 13 for Figure 12 Enlarged view at point D1;

[0070] Figure 14 A cross-sectional view of a battery provided for some other embodiments of this application;

[0071] Figure 15 for Figure 14 Enlarged view at point D2;

[0072] Figure 16 A schematic diagram showing the first and second boxes after being closed, provided for further embodiments of this application;

[0073] Figure 17 for Figure 16 A schematic diagram showing that sealant is filled between the first and second sealing surfaces.

[0074] Figure 18 A schematic diagram of the first and second housings after being closed, provided for further embodiments;

[0075] Figure 19 for Figure 18 A schematic diagram showing that sealant is filled between the first and second sealing surfaces.

[0076] Figure 20 A schematic diagram showing the first and second boxes after being closed, as provided in some other embodiments;

[0077] Figure 21 for Figure 20 A schematic diagram showing that sealant is filled between the first and second sealing surfaces.

[0078] Figure 22 A cross-sectional view of a battery provided in some embodiments of this application;

[0079] Figure 23 A schematic diagram of the first and second boxes after they are closed, provided in some further embodiments;

[0080] Figure 24 This is a schematic diagram of the first and second housings after being closed, as provided in some other embodiments.

[0081] Icons: 1000 - Vehicle; 100 - Battery; 10 - Battery cell; 20 - First housing; 21 - First sealing surface; 22 - First end wall; 23 - First side wall; 24 - Third side wall; 30 - Second housing; 31 - First surface; 32 - Second sealing surface; 33 - Second end wall; 34 - Second side wall; 35 - Fourth side wall; 40 - Sealant; 50 - Sealant barrier structure; 51 - First protrusion; 511 - First abutment surface; 52 - Groove; 53 - Second protrusion; 54 - Receiving groove; 200 - Controller; 300 - Motor; X - First direction; Y - Second direction; Z - Third direction; A - Enclosed space; B - Sealant space; C - Recess. Detailed Implementation

[0082] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0083] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0084] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0085] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0086] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0087] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0088] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells. The housing can reduce the risk of liquids or other foreign matter affecting the charging or discharging of the battery cells.

[0089] In this application, "multiple" means two or more (including two).

[0090] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0091] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0092] A single battery cell may include an electrode assembly. The electrode assembly may include a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0093] In some embodiments, the battery cell may further include an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte may be liquid, gel-like, or solid. Liquid electrolytes may include electrolyte salts and solvents. Solid electrolytes may include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0094] In some implementations, the electrode assembly can be a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0095] In some implementations, the electrode assembly may be cylindrical in shape.

[0096] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0097] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0098] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes.

[0099] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0100] In some embodiments, the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0101] In some embodiments, the battery can be a battery pack, which includes a housing and individual battery cells, with the individual cells or battery modules housed within the housing. The housing may include a first housing and a second housing, which are connected to form a closed space. The second housing has a first surface for supporting the individual battery cells, which are disposed within the closed space to reduce the risk of liquids or other foreign matter affecting the charging or discharging of the individual battery cells.

[0102] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0103] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0104] The battery casing includes a first casing and a second casing, which are interlocked to form a closed space for accommodating individual battery cells. The first and second casings are sealed together to seal the closed space. In related technologies, both the first and second casings have flange structures protruding outwards from their edges (typically protruding parallel to the surface of the casing supporting the battery cells). The flange structures of the first and second casings form a sealing surface, and both sealing surfaces are parallel to the surface of the casing supporting the battery cells. The sealing interface formed by the sealing surfaces of the first and second casing flange structures is also parallel to the surface of the casing supporting the battery cells. However, the protruding flange structures occupy space parallel to the first surface, resulting in low battery space utilization and affecting the battery's volumetric energy density.

[0105] Based on the above considerations, in order to improve the problem that the flange structure occupies additional space due to the sealing achieved by forming a flange structure at the edges of the first and second housings, resulting in low battery space utilization and affecting battery energy density, this application provides a battery comprising a battery cell, a first housing, and a second housing; the first housing includes a first sealing surface; the second housing includes a first surface and a second sealing surface, the first surface being used to support the battery cell; the first housing and the second housing together enclose a closed space for accommodating the battery cell, the first sealing surface and the second sealing surface cooperating to seal the closed space; the first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.

[0106] Both the first sealing surface and the second seal intersect with the first surface, meaning that the first sealing surface is not parallel to the first surface, and the second sealing surface is not parallel to the first surface. Under the same sealing width, compared to the case where the first sealing surface and the second sealing surface are parallel to the first surface, the fact that both the first sealing surface and the second seal intersect with the first surface can reduce the space occupied by the first sealing surface and the second sealing surface in the direction parallel to the first surface and intersecting with the first sealing surface and the second sealing surface. This improves the space utilization rate of the battery in the direction parallel to the first surface and intersecting with both the first sealing surface and the second sealing surface, so as to accommodate more battery cells or reduce the volume of the battery, thereby increasing the volumetric energy density of the battery.

[0107] The batteries disclosed in this application can be used, but are not limited to, in battery cabinets, containerized energy storage devices, etc. An energy storage device may include multiple batteries disclosed in this application.

[0108] The batteries disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using batteries disclosed in this application.

[0109] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, heavy trucks, buses, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0110] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0111] Please refer to Figure 1 , Figure 1This is a schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The type of vehicle 1000 can be a sedan, SUV, heavy truck, or bus, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0112] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0113] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0114] like Figure 2 , Figure 3 , Figure 4 As shown, some embodiments of this application provide a battery 100, which includes a battery cell 10, a first housing 20, and a second housing 30. The first housing 20 includes a first sealing surface 21. The second housing 30 includes a first surface 31 and a second sealing surface 32. The first surface 31 is used to support the battery cell 10. The first housing 20 and the second housing 30 together enclose a closed space A for accommodating the battery cell 10. The first sealing surface 21 and the second sealing surface 32 cooperate to seal the closed space A. The first sealing surface 21 intersects with the first surface 31, and the second sealing surface 32 intersects with the first surface 31.

[0115] The first housing 20 and the second housing 30 together form the housing of the battery 100. Each battery cell 10 is housed within the enclosed space A defined by the first housing 20 and the second housing 30. The battery 100 may include one or more battery cells 10. In embodiments where the battery 100 includes multiple battery cells 10, the multiple battery cells 10 may be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that the supports of the multiple battery cells 10 are connected in both series and parallel.

[0116] The second housing 30 has a first surface 31 for supporting the battery cell 10. This first surface 31 can be understood as either the surface of the second housing 30 used to place the battery cell 10, or the surface of the second housing 30 used to bear the main weight of the battery cell 10. The second housing 30 can be considered the main part supporting the battery cell 10. For example, the second housing 30 can serve as the lower housing of the battery 100, and the bottom wall of the lower housing facing the battery cell 10 can be the first surface 31. The first housing 20 can be considered the upper housing of the battery 100. The first housing 20 and the second housing 30 overlap each other in the first direction X to define a closed space A.

[0117] In some embodiments, the first housing 20 and the second housing 30 may be made of aluminum, aluminum alloy, stainless steel, or plastic, respectively. The materials of the first housing 20 and the second housing 30 may be the same or different.

[0118] In some embodiments, the second housing 30 serves as the main component supporting the battery cell 10. The second housing 30 can be made of a material with high structural strength, such as aluminum alloy, steel, or other materials with high structural strength. The first housing 20 can be made of a material with low density, such as plastic, so that the mass of the first housing 20 does not affect the mass energy density of the battery 100 as much as possible, and also helps to reduce the weight of the battery 100.

[0119] The first housing 20 and the second housing 30 provide a closed space A for the battery cell 10. In some embodiments, the first housing 20 and the second housing 30 overlap each other to define a closed space A for accommodating the battery cell 10. Of course, the connection between the first housing 20 and the second housing 30 can be sealed by a sealing element (not shown), such as a sealing ring, a sealing gasket, or sealant 40.

[0120] The first housing 20 and the second housing 30 can have various shapes, such as cuboids or cylinders. The first housing 20 can be a hollow structure with an opening on one side forming a cavity for accommodating the battery cell 10, and the second housing 30 can also be a hollow structure with an opening on one side forming a cavity for accommodating the battery cell 10. When the opening side of the first housing 20 is closed to the opening side of the second housing 30, a housing with a closed space A is formed. Alternatively, the first housing 20 can be a hollow structure with an opening on one side forming a cavity for accommodating the battery cell 10, and the second housing 30 can be a plate-like structure, with the second housing 30 closing to the opening side of the first housing 20, thus forming a housing with a closed space A. Alternatively, the second housing 30 can be a hollow structure with an opening on one side forming a cavity for accommodating the battery cell 10, and the first housing 20 can be a plate-like structure, with the first housing 20 closing to the opening side of the second housing 30, thus forming a housing with a closed space A.

[0121] The first sealing surface 21 is the surface of the first housing 20 used for sealing connection with the second housing 30. The second sealing surface 32 is the surface of the second housing 30 used to form a sealing interface with the first sealing surface 21 of the first housing 20 to seal the enclosed space A. The first sealing surface 21 and the second sealing surface 32 cooperate to seal the enclosed space A, thereby reducing the risk of interference from the external environment to the battery cells 10 inside the enclosed space A, so that the battery 100 can operate normally and improve the reliability of the battery 100.

[0122] There are several ways to form a sealed connection between the first sealing surface 21 and the second sealing surface 32. For example, the first housing 20 and the second housing 30 can be welded together at the first sealing surface 21 and the second sealing surface 32 to achieve a sealed connection. Another example is that a sealing gasket is sandwiched between the first sealing surface 21 and the second sealing surface 32, and the first housing 20 and the second housing 30 are locked together by a connector to make the sealing gasket stably sandwiched between the first sealing surface 21 and the second sealing surface 32 to achieve a seal. Yet another example is that a sealant 40 is filled between the first sealing surface 21 and the second sealing surface 32, and the sealant 40 adheres to the first sealing surface 21 and the second sealing surface 32 to achieve a seal.

[0123] "The first sealing surface 21 and the first surface 31 intersect" does not only mean that the first sealing surface 21 and the first surface 31 intersect directly. It can also mean that the extended surface of the first sealing surface 21 intersects with the extended surface of the first surface 31, or that the plane containing the first sealing surface 21 intersects with the plane containing the first surface 31. In other words, the first sealing surface 21 and the first surface 31 are not parallel. The first sealing surface 21 and the first surface 31 can intersect perpendicularly or non-perpendicularly. Non-perpendicular intersection of the first sealing surface 21 and the first surface 31 means that the first sealing surface 21 and the first surface 31 can intersect at an obtuse angle or an acute angle.

[0124] "The second sealing surface 32 intersects with the first surface 31" does not only mean that the second sealing surface 32 and the first surface 31 intersect directly. It could also mean that the extended surface of the second sealing surface 32 intersects with the extended surface of the first surface 31, or that the plane containing the second sealing surface 32 intersects with the plane containing the first surface 31. In other words, the second sealing surface 32 and the first surface 31 are not parallel. The second sealing surface 32 and the first surface 31 can intersect perpendicularly or non-perpendicularly. Non-perpendicular intersection of the second sealing surface 32 and the first surface 31 means that the second sealing surface 32 and the first surface 31 can intersect at an obtuse angle or an acute angle.

[0125] Both the first sealing surface 21 and the second seal intersect with the first surface 31, meaning that the first sealing surface 21 is not parallel to the first surface 31, and the second sealing surface 32 is not parallel to the first surface 31. Under the same sealing width, compared to the case where the first sealing surface 21 and the second sealing surface 32 are parallel to the first surface 31, the fact that both the first sealing surface 21 and the second seal intersect with the first surface 31 can reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32. This improves the space utilization rate of the battery 100 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second seal, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby increasing the volumetric energy density of the battery 100.

[0126] In some embodiments, at least one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31.

[0127] like Figures 3-6 As shown, one of the first sealing surface 21 and the second sealing surface 32 may intersect the first surface 31 perpendicularly, while the other may not intersect the first surface 31 perpendicularly. Alternatively, the first sealing surface 21 may intersect the first surface 31 perpendicularly, while the second sealing surface 32 may not intersect the first sealing surface 21 perpendicularly.

[0128] The first sealing surface 21 and the second sealing surface 32 can both intersect the first surface 31 perpendicularly.

[0129] At least one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31, which can reduce the space occupied by the one of the first sealing surfaces 21 and 32 perpendicular to the first surface 31 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32. This allows the one of the first sealing surfaces 21 and 32 perpendicular to the first surface 31 to make full use of the space in the direction perpendicular to the first surface 31, which is beneficial to improving the volumetric energy density of the battery 100.

[0130] like Figures 3-6 As shown, in some embodiments, one of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31, and the other of the first sealing surface 21 and the second sealing surface 32 is not perpendicular to the first surface 31 and intersects with it.

[0131] In some embodiments, the first sealing surface 21 and the first surface 31 may intersect perpendicularly, while the second sealing surface 32 and the first surface 31 may not be perpendicular but intersect.

[0132] In other embodiments, the second sealing surface 32 and the first surface 31 may intersect perpendicularly, while the first sealing surface 21 and the first surface 31 may not intersect perpendicularly.

[0133] One of the first sealing surface 21 and the second sealing surface 32 is perpendicular to the first surface 31, while the other is not perpendicular to the first surface 31 but intersects with it. This not only reduces the space occupied by the first sealing surface 21 and the second sealing surface 32 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32, thereby improving the space utilization rate of the battery 100 in the direction parallel to the first surface 31 and intersecting with both the first sealing surface 21 and the second sealing surface, so as to accommodate more battery cells 10 or reduce the volume of the battery 100, thereby increasing the volumetric energy density of the battery 100, but also makes full use of the space in the direction perpendicular to the first surface 31, further improving the volumetric energy density of the battery 100.

[0134] In embodiments where one of the first sealing surface 21 and the second sealing surface 32 intersects the first surface 31 perpendicularly, and the other does not intersect the first surface 31 perpendicularly, such as... Figures 3-6 As shown, one of the first sealing surfaces 21 and the second sealing surface 32, which is perpendicular to the first surface 31, is located on the side of the other away from the enclosed space A.

[0135] If the first sealing surface 21 intersects the first surface 31 perpendicularly, and the second sealing surface 32 does not intersect the first surface 31 perpendicularly, the first sealing surface 21 is further away from the enclosed space A relative to the second sealing surface 32, or the first sealing surface 21 is located outside the second sealing surface 32.

[0136] If the second sealing surface 32 intersects the first surface 31 perpendicularly, and the first sealing surface 21 does not intersect the first surface 31 perpendicularly, the second sealing surface 32 is further away from the closed space A relative to the first sealing surface 21, or the second sealing surface 32 is located outside the first sealing surface 21.

[0137] If one of the first sealing surface 21 and the second sealing surface 32, which is perpendicular to the first surface 31, is located on the side of the other that is away from the enclosed space A, then the one of the first sealing surface 21 and the second sealing surface 32 that is not perpendicular to the first surface 31 is set close to the enclosed space A. This can make full use of the internal space of the box formed by the first box 20 and the second box 30, reduce the external size of the battery 100, and help improve the volumetric energy density of the battery 100.

[0138] In some embodiments, the second sealing surface 32 is perpendicular to the first surface 31, and the second sealing surface 32 is located on the side of the first sealing surface 21 away from the enclosed space A.

[0139] The second sealing surface 32 intersects the first surface 31 perpendicularly, while the second sealing surface 32 is not perpendicular to the first surface 31.

[0140] The second sealing surface 32 is perpendicular to the first surface 31. The second sealing surface 32 is located on the side of the first sealing surface 21 away from the closed space A. This not only allows the second sealing surface 32 to utilize the space in the direction perpendicular to the first surface 31, but also facilitates the assembly of the first housing 20 and the second housing 30.

[0141] Depending on the different structures of the first housing 20 and the second housing 30, the positions of the first sealing surface 21 and the second seal also differ.

[0142] like Figures 3-6 As shown, in some embodiments, the first housing 20 includes a first end wall 22 and a first side wall 23 connected to each other, and a first sealing surface 21 is disposed on the first side wall 23; the second housing 30 includes a second end wall 33 and a second side wall 34 connected to each other, the second end wall 33 has a first surface 31 and is disposed opposite to the first end wall 22 along a first direction X, the first direction X is perpendicular to the first surface 31, and the second sealing surface 32 is disposed on the second side wall 34.

[0143] The first sidewall 23 is connected to the end of the first endwall 22 along the second direction Y, and the first sidewall 23 extends from the first endwall 22 toward the direction close to the second housing 30.

[0144] The second direction Y is parallel to the first surface 31, and the first direction X is perpendicular to the second direction Y. The first sealing surface 21 and the second sealing surface 32 can both intersect the second direction Y. In some embodiments, the second direction Y can be the width direction of the battery 100. Since both the first sealing surface 21 and the second sealing surface 32 intersect the first surface 31, the first sealing surface 21 and the second sealing surface 32 intersect the second direction Y. In other words, the first sealing surface 21 and the second sealing surface 32 intersect the width direction of the battery 100. Under the same sealing width, compared to the case where the first sealing surface 21 and the second sealing surface 32 are parallel to the first surface 31 (the first sealing surface 21 and the second sealing surface 32 are parallel to the second direction Y), the fact that both the first sealing surface 21 and the second sealing surface 32 intersect the first surface 31 can reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in 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 10 or reduce the volume of the battery 100, thereby increasing the volumetric energy density of the battery 100. The smaller width of the battery 100 also helps to reduce the width of the electrical equipment powered by it. For example, if the electrical equipment is a heavy truck powered by the battery 100 provided in this embodiment, the width of the heavy truck can be made smaller. Generally, the width of the battery 100 is basically the same as the width of the heavy truck, meaning the heavy truck can have a smaller width.

[0145] The first housing 20 and the second housing 30 can be considered to overlap each other in the height direction of the battery 100 to define an enclosed space A. The height direction of the battery 100 is substantially consistent with the first direction X. In some embodiments, the height direction of the battery 100 may be substantially consistent with the height direction of the heavy truck.

[0146] The first end wall 22 and the first side wall 23 can be integrally formed. Alternatively, the first end wall 22 and the first side wall 23 can be separate parts that are then connected to form the first housing 20. The connection methods of the first end wall 22 and the first side wall 23 include, but are not limited to, welding, bonding, and screw connection.

[0147] The first sealing surface 21 may be at least a portion of the surface of the first sidewall 23 facing the enclosed space A in the second direction Y, or at least a portion of the surface facing away from the enclosed space A.

[0148] The second sidewall 34 is connected to the end of the second endwall 33 along the second direction Y corresponding to the first sidewall 23, and the second sidewall 34 extends from the second endwall 33 toward the direction close to the first housing 20.

[0149] The second end wall 33 and the second side wall 34 can be integrally formed. Alternatively, the second end wall 33 and the second side wall 34 can be separate parts that are then connected to form the second housing 30. The connection methods of the second end wall 33 and the second side wall 34 include, but are not limited to, welding, bonding, and screw connection.

[0150] The surface of the second end wall 33 facing the first end wall 22 in the first direction X is the first surface 31. The second sealing surface 32 may be at least a portion of the surface of the second side wall 34 facing the enclosed space A in the second direction Y, or at least a portion of the surface facing away from the enclosed space A.

[0151] The first housing 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the second housing 30 includes a second end wall 33 and a second side wall 34 connected to each other. On the one hand, this allows the first housing 20 and the second housing 30 to enclose a closed space A for accommodating the battery cell 10. On the other hand, the first sealing surface 21 is disposed on the first side wall 23 and the second sealing surface 32 is disposed on the second side wall 34, which allows the first sealing surface 21 and the second sealing surface 32 to have a large area, so as to form a good connection relationship and good sealing performance with the second sealing surface 32. This makes the battery 100 have high reliability and also makes the structure of the first housing 20 and the second housing 30 simple and easy to manufacture.

[0152] like Figures 3-6 As shown, in some embodiments, the first housing 20 includes two first sidewalls 23, which are respectively connected to the two ends of the first end wall 22 along the second direction Y. The second housing 30 includes two second sidewalls 34, which are respectively connected to the two ends of the second end wall 33 along the second direction Y. Each first sidewall 23 is provided with a first sealing surface 21, and each second sidewall 34 is provided with a second sealing surface 32. The first sidewalls 23 and the second sidewalls 34 are arranged in a one-to-one correspondence, and the first sealing surfaces 21 and the second sealing surfaces 32 are arranged in a one-to-one correspondence. The first sealing surface 21 of each first sidewall 23 and the second sealing surface 32 of the corresponding second sidewall 34 cooperate to seal and enclose the space A in the second direction Y.

[0153] like Figures 3-6 As shown, in some embodiments, the first sealing surface 21 is not perpendicular to the first surface 31 and intersects it, and the first sidewall 23 and the first endwall 22 are connected at an obtuse angle; or, as... Figure 7 , Figure 8 As shown, the second sealing surface 32 is not perpendicular to the first surface 31 and intersects with it, and the second sidewall 34 and the second endwall 33 are connected at an obtuse angle.

[0154] like Figures 3-6As shown, the first sidewall 23 and the first endwall 22 are connected at an obtuse angle, and the first sealing surface 21 intersects the first surface 31 at an acute angle. In an embodiment where the first housing 20 includes two first sidewalls 23, both first sidewalls 23 are connected to the first endwall 22 at an obtuse angle, and the two first sidewalls 23 are arranged in a V-shape.

[0155] like Figure 7 , Figure 8 As shown, the second sidewall 34 and the second endwall 33 are connected at an obtuse angle, and the second sealing surface 32 intersects the first surface 31 at an obtuse angle. In the embodiment where the second housing 30 includes two second sidewalls 34, both second sidewalls 34 are connected to the second endwall 33 at an obtuse angle, and the two second sidewalls 34 are arranged in an inverted V-shape.

[0156] The first sidewall 23 and the first endwall 22 are connected at an obtuse angle, so that the first sealing surface 21 and the first surface 31 do not intersect perpendicularly. This facilitates the filling of the space between the first sealing surface 21 and the second sealing surface 32 with sealant 40 or the placement of a sealing gasket, which is beneficial for forming a reliable sealing relationship between the first housing 20 and the second housing 30. The second sidewall 34 and the second endwall 33 are connected at an obtuse angle, so that the second sealing surface 32 and the first surface 31 do not intersect perpendicularly. This also facilitates the filling of the space between the first sealing surface 21 and the second sealing surface 32 with sealant 40 or the placement of a sealing gasket, which is beneficial for forming a reliable sealing relationship between the first housing 20 and the second housing 30.

[0157] like Figures 3-6 As shown, in the embodiment where the first end wall 22 and the first side wall 23 are arranged at an obtuse angle, the second end wall 33 and the second side wall 34 can be arranged perpendicularly. The second side wall 34 is located outside the first side wall 23, that is, the second side wall 34 is located on the side of the first side wall 23 facing away from the enclosed space A. At least a portion of the surface of the first side wall 23 facing the second side wall 34 forms a first sealing surface 21. The surface of the first side wall 23 facing the second side wall 34 is also the surface of the first side wall 23 facing away from the enclosed space A. At least a portion of the surface of the second side wall 34 facing the first side wall 23 forms a second sealing surface 32. The surface of the second side wall 34 facing the first side wall 23 is also the surface of the second side wall 34 facing the enclosed space A.

[0158] like Figures 3-8 As shown, in some embodiments, the first sealing surface 21 and the second sealing surface 32 together form an adhesive-containing space B for accommodating the sealant 40.

[0159] In the embodiment where the first sidewall 23 and the first endwall 22 are arranged at an obtuse angle, and the second sidewall 34 and the second endwall 33 are arranged perpendicularly, the cross-section of the adhesive space B formed by the first sealing surface 21 and the second sealing surface 32 can be triangular, so as to form a larger opening at the end of the adhesive space B away from the second endwall 33, so as to facilitate filling the adhesive space B.

[0160] The space B can be filled with sealant 40. Sealant 40 can be a sealing material with certain adhesive properties, and it also serves to prevent leakage, waterproof, dampen vibration, and insulate within the space B. Sealant 40 can be silicone sealant 40, polyurethane sealant 40, polysulfide sealant 40, acrylic sealant 40, anaerobic sealant 40, butyl sealant 40, neoprene sealant 40, PVC sealant 40, asphalt sealant 40, etc.

[0161] The first sealing surface 21 and the second sealing surface 32 together form a space B for accommodating the sealant 40. By placing the sealant 40 in the space B, not only can the sealing performance of the enclosed space A be improved, but the sealant 40 can also bond the first sealing surface 21 and the second sealing surface 32, thereby improving the connection stability of the first housing 20 and the second housing 30. Since the sealant 40 bonds the first sealing surface 21 and the second sealing surface 32, there is no need to set other connecting parts to connect the first housing 20 and the second housing 30, reducing the number of steps in assembling the battery 100 and saving costs.

[0162] In other embodiments, the space formed between the first sealing surface 21 and the second sealing surface 32 can also be used to accommodate sealing elements such as gaskets and sealing rings (not shown in the figures). The sealing element is sandwiched between the first sealing surface 21 and the second sealing surface 32. The sealing element and the first sealing surface 21 can be abutted or bonded, and the sealing element and the second sealing surface 32 can be abutted or bonded.

[0163] like Figures 9-10 As shown, in some embodiments, when projected along the first direction X, the projection of the adhesive space B at least partially overlaps with the projection of the battery cell 10.

[0164] In an embodiment where the first sidewall 23 and the first endwall 22 are arranged at an obtuse angle, and the second sidewall 34 and the second endwall 33 are perpendicular, at least a portion of the adhesive space B can extend to the side of the battery cell 10 opposite to the first surface 31. Projected along the first direction X, the projection of the portion of the adhesive space B extending to the side of the battery cell 10 opposite to the first surface 31 at least partially overlaps with the projection of the battery cell 10.

[0165] The adhesive space B may extend partly to the side of the battery cell 10 away from the first surface 31, or the adhesive space B may be entirely located on the side of the battery cell 10 away from the first surface 31.

[0166] Projecting along the first direction X, the projection of the adhesive space B at least partially overlaps with the projection of the battery cell 10. Thus, the adhesive space B can occupy as little space as possible in the direction parallel to the first surface 31, while making full use of the space in the direction perpendicular to the first surface 31. Under the condition of occupying as little space as possible in the direction parallel to the first surface 31, the adhesive space B has a large sealing area, thereby improving the sealing performance between the first sealing surface 21 and the second sealing surface 32, and making the battery 100 have higher reliability.

[0167] like Figures 3-6 As shown, in some embodiments, the battery 100 further includes an adhesive barrier structure 50, which is disposed at the junction of the enclosed space A and the adhesive-containing space B.

[0168] The sealant barrier structure 50 is used to block the sealant 40 filled in the sealant space B, thereby reducing the risk of the sealant 40 in the sealant space B overflowing into the closed space A.

[0169] The adhesive-blocking structure 50 is located at the junction of the enclosed space A and the adhesive-containing space B, or it can be understood as the adhesive-blocking structure 50 being located at the boundary between the enclosed space A and the adhesive-containing space B.

[0170] A sealant-blocking structure 50 is provided at the junction of the enclosed space A and the adhesive-containing space B. The sealant-blocking structure 50 can limit the overflow of the sealant 40 contained in the adhesive-containing space B into the enclosed space A, reduce the waste of sealant 40, and enable the battery 100 to have better sealing performance, which is beneficial to improving the sealing reliability of the battery 100.

[0171] like Figures 3-6 As shown, in an embodiment where the first end wall 22 and the first side wall 23 are arranged at an obtuse angle, and the second end wall 33 and the second side wall 34 are perpendicular, the adhesive barrier structure 50 is disposed on the second side wall 34.

[0172] The adhesive barrier structure 50 is provided on the second side wall 34 and can support the first box 20 in the direction of gravity. It can restrict the first box 20 from moving in the direction close to the second end wall 33 so that the first box 20 and the second box 30 form a closed space A of a certain size.

[0173] The adhesive barrier structure 50 can support the first housing 20 by supporting the end of the first side wall 23 that is away from the first end wall 22.

[0174] like Figure 3 , Figure 4 As shown, the adhesive barrier structure 50 is a first protrusion 51 protruding from the inner surface of the second side wall 34, and the first housing 20 is supported by the first protrusion 51.

[0175] The inner surface of the second sidewall 34 is the surface of the second sidewall 34 facing the enclosed space A. The adhesive-blocking structure 50 is a first protrusion 51 provided on the inner surface of the second sidewall 34. The first protrusion 51 protrudes from the first inner surface along the second direction Y and extends into the enclosed space A.

[0176] The first protrusion 51 and the second sidewall 34 can be integrally formed to facilitate the manufacturing of the second housing 30. The first protrusion 51 and the second sidewall 34 can also be separately provided, with the first protrusion 51 then connected to the second sidewall 34. There are various ways to connect the first protrusion 51 and the second sidewall 34, such as welding, bonding, or screwing.

[0177] Along the first direction X, the first protrusion 51 has a first abutment surface 511 located on the side opposite to the second end wall 33. The end of the first side wall 23 away from the first end wall 22 abuts against the first abutment surface 511. In embodiments where the second housing 30 includes two second side walls 34, the first inner surfaces of both second side walls 34 are provided with the first protrusion 51, and the ends of the two first side walls 23 of the first housing 20 away from the first end wall 22 abut against the first abutment surfaces 511 of the two first protrusions 51, respectively. The first abutment surfaces 511 of the two first protrusions 51 can be located in the same plane, so that the ends of the two first side walls 23 of the first housing 20 opposite to the first end wall 22 can be at the same height in the first direction X.

[0178] The first protrusion 51 not only prevents the sealant 40 in the adhesive space B from entering the closed space A, but also restricts the first housing 20 from moving towards the second end wall 33, so that the closed space A maintains a certain size to accommodate the battery cell 10.

[0179] Therefore, the sealant barrier structure 50 is a first protrusion 51 protruding from the inner surface of the second side wall 34. It can not only prevent the sealant 40 in the sealant-containing space B from overflowing into the closed space A, but also support the first box 20 and restrict the first box 20 from moving towards the second box 30, so that the closed space A maintains a larger size.

[0180] In some embodiments, along the first direction X, the distance between the first abutment surface 511 and the end of the second sidewall 34 opposite to the second end wall 33 is less than the distance between the first abutment surface 511 and the first surface 31. This allows the first housing 20 to be positioned closer to the end of the second sidewall 34 opposite to the second end wall 33, facilitating the assembly of the first housing 20 and the second housing 30. The second sidewall 34 of the second housing 30 is relatively tall along the first direction X, allowing the second housing 30 to be a high-wall structure, also referred to as a high-standing-wall structure. The size of the first sidewall 23 of the first housing 20 can be set smaller, further facilitating the assembly of the first housing 20 and the second housing 30.

[0181] like Figure 3 , Figure 4 As shown, in some embodiments, the end of the first protrusion 51 facing the second end wall 33 can form a gap with the second end wall 33, reducing the occupation of the enclosed space A by the first protrusion 51 and reducing the risk of interference between the first protrusion 51 and the internal structure of the enclosed space A.

[0182] like Figure 11 As shown, in some other embodiments, the end of the first protrusion 51 facing the second end wall 33 can extend to the second end wall 33, and the second end wall 33 can support the first protrusion 51. In this way, the first end wall 22 and the first protrusion 51 can jointly support the first housing 20, reducing the risk that the first protrusion 51 will detach from the second side wall 34 due to bearing the weight of the first housing 20.

[0183] like Figure 5 , Figure 6 As shown, in some other embodiments, the adhesive barrier structure 50 is a groove 52 provided on the inner surface of the second sidewall 34, and a portion of the first housing 20 is located within the groove 52.

[0184] The adhesive-blocking structure 50 can be a groove 52 provided on the first inner surface, at least a portion of the first housing 20 is inserted into the groove 52, and the groove wall of the groove 52 supports the first housing 20.

[0185] In an embodiment where the first housing 20 includes a first end wall 22 and a first side wall 23, the first side wall 23 can be inserted into a groove 52, and the groove wall surface of the groove 52 abuts against the end of the first side wall 23 away from the first end wall 22.

[0186] In some embodiments, along the first direction X, the groove 52 can extend to the end face of the second sidewall 34 away from the second endwall 33, thus forming an L-shaped groove 52 on the second sidewall 34. Both the groove sidewall and the bottom surface of the groove 52 can abut against the end of the first sidewall 23 away from the first endwall 22. The surface of the groove 52 facing the first sealing surface can either abut against the first sidewall 23 or form the second sealing surface 32. The groove sidewall of the groove 52 can be the groove wall surface of the groove 52 parallel to the first direction X, and the groove bottom surface of the groove 52 can be the groove wall surface of the groove 52 intersecting the first direction X.

[0187] In an embodiment where the second housing 30 includes two second sidewalls 34, each of the first inner surfaces of the two second sidewalls 34 is provided with a groove 52. The ends of the two first sidewalls 23 of the first housing 20 away from the first end wall 22 respectively abut against the groove wall surfaces of the two grooves 52. The bottom surfaces of the two grooves 52 can be located in the same plane, so that the ends of the two first sidewalls 23 of the first housing 20 away from the first end wall 22 can be at the same height in the first direction X.

[0188] The groove 52 not only prevents the sealant 40 in the adhesive space B from entering the closed space A, but the bottom surface of the groove 52 also restricts the first box 20 from moving towards the second end wall 33, so that the closed space A maintains a certain size to accommodate the battery cell 10.

[0189] The sealant barrier structure 50 is a groove 52 set on the inner surface of the second side wall 34. It can not only prevent the sealant 40 in the sealant-containing space B from overflowing into the closed space A, but also reduce the weight of the second box 30. Such a sealant barrier structure 50 will not interfere with the structure in the closed space A.

[0190] In some embodiments, along the first direction X, the distance between the bottom surface of the groove 52 and the end of the second sidewall 34 facing away from the second endwall 33 is less than the distance between the bottom surface of the groove 52 and the first surface 31. This allows the first housing 20 to be closer to the opening side of the second housing 30, facilitating the assembly of the first housing 20 and the second housing 30. The second sidewall 34 of the second housing 30 is relatively tall along the first direction X, allowing the second housing 30 to be a high-wall structure, also referred to as a high-standing-wall housing. The size of the first sidewall 23 of the first housing 20 can then be set smaller, further facilitating the assembly of the first housing 20 and the second housing 30.

[0191] The adhesive-blocking structure 50 is disposed on the second sidewall 34 to reduce the risk of interference between the adhesive-blocking structure 50 and the battery cell 10.

[0192] like Figures 12-15 As shown, in some embodiments, the second sidewall 34 is bent from the end of the second endwall 33 along the first direction X toward the side away from the battery cell 10 to form a recess C, and the first sidewall 23 is inserted into the recess C; or, the first sidewall 23 is bent from the end of the first endwall 22 along the first direction X toward the side away from the battery cell 10 to form a recess C, and the second sidewall 34 is inserted into the recess C; the recess C is used to accommodate the sealant 40.

[0193] like Figure 12 , Figure 13 As shown, the second sidewall 34 is bent from one end of the second endwall 33 to form a recess C with an opening facing the first endwall 22 along the first direction X. After bending, a portion of the inner surface of the second sidewall 34 forms the wall surface of the recess C, and a portion of the inner surface of the second sidewall 34 can form the second sealing surface 32. In this embodiment, the inner surface of the second sidewall 34 refers to the surface of the second sidewall 34 facing the battery cell 10 in the second direction Y before bending. After the second sidewall 34 is bent to form the recess C, the bottom wall surface of the recess C facing away from the enclosed space A in the first direction X can protrude from the surface of the second endwall 33 facing away from the enclosed space A. Forming the recess C by bending has little impact on the strength of the second housing 30.

[0194] The first sidewall 23 is inserted into the recess C, and at least a portion of the first sidewall 23 facing away from the surface of the enclosed space A in the second direction Y forms a first sealing surface 21. The first sealing surface 21 and the second sealing surface 32 can be fitted together. The sealant 40 is accommodated in the recess C and located on the side of the first sidewall 23 facing the enclosed space A. The sealant 40 can connect the surface of the first sidewall 23 facing the enclosed space A and the wall surface of the recess C opposite to the surface of the first sidewall 23 facing the enclosed space A, so that the first sealing surface 21, the second sealing surface 32 and the sealant 40 together seal the enclosed space A.

[0195] Of course, in other embodiments, a space for accommodating sealant 40 can also be formed between the first sealing surface 21 and the second sealing surface 32. The sealant 40 can be accommodated in the recess C and entirely located between the first sealing surface 21 and the second sealing surface 32. Alternatively, the sealant 40 can be accommodated in the recess C and partially located between the first sealing surface 21 and the second sealing surface 32. The sealant 40 can connect the first sealing surface 21 and the second sealing surface 32, with another portion located on the side of the first sidewall 23 facing the enclosed space A. The sealant 40 can connect the surface of the first sidewall 23 facing the enclosed space A and the wall surface of the recess C opposite to the surface of the first sidewall 23 facing the enclosed space A. This not only improves the sealing performance but also enhances the stability of the first sidewall 23 within the recess C. In one embodiment, a space for accommodating sealant 40 can also be formed between the first sealing surface 21 and the second sealing surface 32. In another embodiment, the sealant 40 is accommodated in the recess C and is entirely located between the first sealing surface 21 and the second sealing surface 32. In this embodiment, the surface of the first sidewall 23 facing the closed space A and the surface of the recess C facing the closed space A can either fit together or form a gap.

[0196] In an embodiment where the second housing 30 includes two second sidewalls 34, both second sidewalls 34 can be bent to form recesses C, and the recesses C of the two second sidewalls 34 are respectively located at both ends of the second end wall 33 along the second direction Y. The two first sidewalls 23 can be respectively inserted into the recesses C formed by bending the two second sidewalls 34.

[0197] like Figure 14 , Figure 15As shown, the first sidewall 23 is bent from one end of the first endwall 22 to form a recess C with an opening facing the second endwall 33 along the first direction X. After the first sidewall 23 is bent, a portion of the inner surface of the first sidewall 23 forms the wall surface of the recess C, and a portion of the inner surface of the first sidewall 23 can form the first sealing surface 21. In this embodiment, the inner surface of the first sidewall 23 refers to the surface of the first sidewall 23 facing the battery cell 10 in the second direction Y before bending. After the first sidewall 23 is bent to form the recess C, the surface of the bottom wall of the recess C facing away from the enclosed space A in the first direction X can protrude from the surface of the first endwall 22 facing away from the enclosed space A.

[0198] The concave portion C formed by bending has little impact on the strength of the first housing 20.

[0199] The second sidewall 34 is inserted into the recess C, and at least a portion of the second sidewall 34 facing away from the surface of the enclosed space A in the second direction Y forms a second sealing surface 32. The first sealing surface 21 and the second sealing surface 32 can be fitted together. The sealant 40 is accommodated in the recess C and located on the side of the second sidewall 34 facing the enclosed space A. The sealant 40 can connect the surface of the second sidewall 34 facing the enclosed space A and the wall surface of the recess C opposite to the surface of the second sidewall 34 facing the enclosed space A, so that the first sealing surface 21, the second sealing surface 32 and the sealant 40 together seal the enclosed space A.

[0200] Of course, in other embodiments, a space for accommodating sealant 40 can also be formed between the first sealing surface 21 and the second sealing surface 32. The sealant 40 can be accommodated in the recess C and entirely located between the first sealing surface 21 and the second sealing surface 32. Alternatively, the sealant 40 can be accommodated in the recess C and partially located between the first sealing surface 21 and the second sealing surface 32. The sealant 40 can connect the first sealing surface 21 and the second sealing surface 32, with another portion located on the side of the second sidewall 34 facing the enclosed space A. The sealant 40 can connect the surface of the second sidewall 34 facing the enclosed space A and the wall surface of the recess C opposite to the surface of the second sidewall 34 facing the enclosed space A. This not only improves the sealing performance but also enhances the stability of the first sidewall 23 within the recess C. In one embodiment, a space for accommodating sealant 40 can also be formed between the first sealing surface 21 and the second sealing surface 32. In another embodiment, the sealant 40 is accommodated in the recess C and is entirely located between the first sealing surface 21 and the second sealing surface 32. In this embodiment, the surface of the second sidewall 34 facing the closed space A and the surface of the recess C facing the closed space A can either fit together or form a gap.

[0201] In an embodiment where the first housing 20 includes two first sidewalls 23, both first sidewalls 23 can be bent to form recesses C, and the recesses C of the two first sidewalls 23 are respectively located at both ends of the first end wall 22 along the second direction Y. Two second sidewalls 34 can be respectively inserted into the recesses C formed by bending the two first sidewalls 23.

[0202] The second sidewall 34 is bent from the end of the second endwall 33 along the first direction X toward the side away from the battery cell 10 to form a recess. The recess can be formed without reducing the strength of the second sidewall 34. The first sidewall 23 is inserted into the recess, which can limit the first sidewall 23 and improve the stability of the first housing 20 and the second housing 30.

[0203] In some embodiments, when projected along the first direction X, the projection of the recess C at least partially overlaps with the projection of the battery cell 10.

[0204] Along the second direction Y, at least a portion of the battery cell 10 extends to the opening of the recess C. In an embodiment where the recess C is disposed at both ends of the second end wall 33 arranged opposite each other along the second direction Y, the battery cell 10 extends along the second direction Y to the opening of the recess C, and a portion of the projection of the battery cell 10 in the first direction X is located within the recess C.

[0205] Projecting along the first direction X, if the projection of the recess C at least partially coincides with the projection of the battery cell 10, then the battery cell 10 can fully utilize the enclosed space A to increase the energy density of the battery cell 10. The battery cell 10 can also prevent the sealant 40 in the recess C from overflowing into the enclosed space A.

[0206] like Figures 16-24 As shown, in some embodiments, both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31.

[0207] The first sealing surface 21 and the second sealing surface 32 are opposite to and parallel to each other in a direction parallel to the first surface 31.

[0208] Both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31. Compared to the case where the first sealing surface 21 and the second sealing surface 32 are parallel to the first surface 31, the fact that both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31 minimizes the space occupied by the first sealing surface 21 and the second sealing surface 32 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface 32. This allows the first sealing surface 21 and the second sealing surface 32 to make full use of the space in the direction perpendicular to the first surface 31, thereby improving the space utilization rate of the battery 100 in the direction parallel to the first surface 31 and intersecting with the first sealing surface 21 and the second sealing surface. This allows for the accommodation of more battery cells 10 or a reduction in the volume of the battery 100, thereby increasing the volumetric energy density of the battery 100.

[0209] like Figures 16-22 As shown, in an embodiment where both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31, the first housing 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the first sealing surface 21 is disposed on the first side wall 23; the second housing 30 includes a second end wall 33 and a second side wall 34 connected to each other, the second end wall 33 has a first surface 31 and is disposed opposite to the first end wall 22 along a first direction X, the first direction X is perpendicular to the first surface 31, and the second sealing surface 32 is disposed on the second side wall 34.

[0210] The first sidewall 23 is connected to the end of the first endwall 22 along the second direction Y, and the first sidewall 23 extends from the first endwall 22 along the first direction X toward the direction close to the second housing 30.

[0211] The second direction Y is parallel to the first surface 31, and the first direction X is perpendicular to the second direction Y. The second direction Y can be the width direction of the battery 100. Since both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31, both the first sealing surface 21 and the second sealing surface 32 are also perpendicular to the second direction Y. In other words, both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the width direction of the battery 100. Under the same sealing width, compared to the case where the first sealing surface 21 and the second sealing surface 32 are parallel to the first surface 31 (both the first sealing surface 21 and the second sealing surface 32 are parallel to the second direction Y), the fact that both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31 can reduce the space occupied by the first sealing surface 21 and the second sealing surface 32 in 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 10 or reduce the volume of the battery 100, thereby increasing the volumetric energy density of the battery 100. The smaller width of the battery 100 also helps to reduce the width of the electrical equipment powered by it. For example, if the electrical equipment is a heavy truck powered by the battery 100 provided in this embodiment, the width of the heavy truck can be made smaller. Generally, the width of the battery 100 is basically the same as the width of the heavy truck, meaning the heavy truck can have a smaller width.

[0212] The first end wall 22 and the first side wall 23 are arranged perpendicularly such that the first sealing surface 21 is perpendicular to the first surface 31. The second end wall 33 and the second side wall 34 are arranged perpendicularly such that the second sealing surface 32 is perpendicular to the first surface 31. The first side wall 23 and the second side wall 34 are arranged opposite to each other and parallel along the second direction Y.

[0213] At least a portion of the surface of the first sidewall 23 facing or away from the closed space A along the second direction Y forms a first sealing surface 21. At least a portion of the surface of the second sidewall 34 facing or away from the closed space A along the second direction Y forms a second sealing surface 32.

[0214] The first housing 20 may include two first sidewalls 23, which are respectively connected to the two ends of the first end wall 22 along the second direction Y, and both first sidewalls 23 are perpendicular to the first end wall 22. The second housing 30 may include two second sidewalls 34, which are respectively connected to the two ends of the second end wall 33 along the second direction Y, and both second sidewalls 34 are perpendicular to the second end wall 33.

[0215] In some embodiments, in the second direction Y, the second sidewall 34 is located on the side of the first sidewall 23 away from the enclosed space A, at least a portion of the surface of the first sidewall 23 away from the enclosed space A forms the first sealing surface 21, and at least a portion of the surface of the second sidewall 34 near the enclosed space A forms the second sealing surface 32.

[0216] The first housing 20 includes a first end wall 22 and a first side wall 23 connected to each other, and the second housing 30 includes a second end wall 33 and a second side wall 34 connected to each other. On the one hand, this allows the first housing 20 and the second housing 30 to enclose a closed space A for accommodating the battery cell 10. On the other hand, the first sealing surface 21 is disposed on the first side wall 23 and the second sealing surface 32 is disposed on the second side wall 34, which allows the first sealing surface 21 and the second sealing surface 32 to have a large area, so as to form a good connection relationship and good sealing performance with the second sealing surface 32. This makes the battery 100 have high reliability and also makes the structure of the first housing 20 and the second housing 30 simple and easy to manufacture.

[0217] like Figures 16-17 As shown, in some embodiments, sealant 40 is filled between the first sealing surface 21 and the second sealing surface 32.

[0218] The first sealing surface 21 and the second sealing surface 32 are arranged at a relative interval in the second direction Y, forming an adhesive-containing space B between them. In an embodiment where the first sidewall 23 and the first endwall 22 are arranged perpendicularly, and the second sidewall 34 and the second endwall 33 are arranged perpendicularly, the adhesive-containing space B between the first sealing surface 21 and the second sealing surface 32 can be an equally spaced space; the adhesive-containing space B between the first sealing surface 21 and the second sealing surface 32 can also be a variable-spacing space where the spacing gradually increases or decreases along the third direction Z.

[0219] The space between the first sealing surface 21 and the second sealing surface 32 is filled with sealant 40, which not only improves the sealing performance of the enclosed space A, but also bonds the first sealing surface 21 and the second sealing surface 32 together, improving the connection stability of the first housing 20 and the second housing 30. Since the sealant 40 bonds the first sealing surface 21 and the second sealing surface 32 together, there is no need to set other connecting parts to connect the first housing 20 and the second housing 30, reducing the number of steps in the battery 100 assembly and saving costs.

[0220] In embodiments where both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31, the space formed between the first sealing surface 21 and the second sealing surface 32 can also be used to accommodate sealing elements such as gaskets and sealing rings. The sealing element is sandwiched between the first sealing surface 21 and the second sealing surface 32. The sealing element and the first sealing surface 21 can be abutted or bonded, and the sealing element and the second sealing surface 32 can be abutted or bonded.

[0221] In some embodiments, when projected along the second direction Y, the projection of the sealant 40 at least partially overlaps with the projection of the battery cell 10, and the second direction Y is parallel to the first surface 31 and intersects the first sidewall 23.

[0222] In an embodiment where both the first sealing surface 21 and the second sealing surface are perpendicular to the first surface 31, at least a portion of the sealant 40 between the first sealing surface 21 and the second sealing surface 32 may extend to one side of the battery cell 10 along the second direction Y. Projected along the second direction Y, the projection of the portion of the sealant 40 extending to one side of the battery cell 10 in the second direction Y at least partially overlaps with the projection of the battery cell 10.

[0223] The sealant 40 may extend partly to one side of the battery cell 10 in the second direction Y, or the sealant 40 may be entirely located on one side of the battery cell 10 in the second direction Y.

[0224] Projecting along the second direction Y, the projection of the sealant 40 at least partially overlaps with the projection of the battery cell 10. This reduces the space occupied by the sealant 40 in other directions intersecting with the second direction Y, allowing the sealant 40 to fully utilize the space of the battery 100 in the second direction Y, thereby improving the energy density of the battery 100. Other directions intersecting with the second direction Y can be any direction intersecting with the second direction Y, such as the first direction X perpendicular to the second direction Y, or a third direction Z perpendicular to both the first direction X and the second direction Y.

[0225] In embodiments where both the first sealing surface 21 and the second sealing surface 32 are perpendicular to the first surface 31, such as Figures 16-20 As shown, the battery 100 also includes a sealant structure 50, which is disposed in the enclosed space A near the first sealing surface 21 and the second sealing surface 32.

[0226] The sealant barrier structure 50 is used to block the sealant 40 that is filled in the sealant space B defined by the first sealing surface 21 and the second sealing surface 32, so as to reduce the risk of the sealant 40 in the sealant space B overflowing into the closed space A.

[0227] The adhesive-blocking structure 50 is located in the enclosed space A near the first sealing surface 21 and the second sealing surface 32. This can be understood as the adhesive-blocking structure 50 being located at the junction of the enclosed space A and the adhesive-containing space B, or at the boundary between the enclosed space A and the adhesive-containing space B.

[0228] A sealant-blocking structure 50 is provided in the enclosed space A near the first sealing surface 21 and the second sealing surface 32. The sealant-blocking structure 50 can limit the overflow of the sealant 40 in the sealant-containing space B into the enclosed space A, reduce the waste of sealant 40, and also enable the battery 100 to have better sealing performance, which is beneficial to improving the sealing reliability of the battery 100.

[0229] like Figures 16-20As shown, in some embodiments, the adhesive-blocking structure 50 may be disposed on the first surface 31. Disposing the adhesive-blocking structure 50 on the first surface 31 facilitates its placement.

[0230] The adhesive-blocking structure 50 disposed on the first surface 31 can take various forms, such as... Figure 16 , Figure 17 As shown, the adhesive barrier structure 50 is a second protrusion 53 protruding from the first surface 31, and a portion of the first housing 20 is located between the second sidewall 34 and the second protrusion 53.

[0231] The adhesive barrier structure 50 can be a second protrusion 53 protruding from the first surface 31, and at least a portion of the first housing 20 is located between the second sidewall 34 and the second protrusion 53 along the first direction X.

[0232] In an embodiment where the first housing 20 includes a first end wall 22 and a first side wall 23, the end of the first side wall 23 away from the first end wall 22 is located between the second side wall 34 and the second protrusion 53. The second protrusion 53 is located on the side of the first side wall 23 facing away from the second side wall 34. The first protrusion 53 can not only limit the sealant 40 between the first sealing surface 21 and the second sealing surface 32 from overflowing into the enclosed space A, but also limit the deformation of the first side wall 23 in the direction away from the first side wall 23, so that the enclosed space A maintains its initial size essentially unchanged. This reduces the risk of the battery cell 10 being squeezed due to the deformation of the first side wall 23 in the direction away from the second side wall 34, and also reduces the risk of the sealant 40 failing to seal between the first sealing surface 21 and the second sealing surface 32 due to the gradual increase of the sealant space B between the first sealing surface 21 and the second sealing surface 32 caused by the deformation of the first side wall 23 in the direction away from the second side wall 34.

[0233] In an embodiment where the first housing 20 includes two first sidewalls 23 and the second housing 30 includes two second housings 30, the first surface 31 may be provided with two first protrusions 51, the two first protrusions 51 are respectively disposed close to the two second sidewalls 34, and the two first sidewalls 23 are respectively inserted between the two first protrusions 51 and the two first sidewalls 23.

[0234] like Figures 18-21 As shown, in some embodiments, the first housing 20 includes a first end wall 22 and a first side wall 23 connected to each other, a first sealing surface 21 is disposed on the first side wall 23, the second housing 30 includes a second end wall 33, the second end wall 33 is provided with a receiving groove 54, the second sealing surface 32 is disposed on the groove wall of the receiving groove 54, the first side wall 23 is inserted into the receiving groove 54, and the receiving groove 54 is filled with sealant 40.

[0235] The first surface 31 of the second end wall 33 has a receiving groove 54. The receiving groove 54 can be recessed from the first surface 31 in a direction away from the first end wall 22. The receiving groove 54 extends to the second side wall 34. At least a portion of the surface of the second side wall 34 facing the closed space A serves as both the second sealing surface 32 and a groove wall surface of the receiving groove 54. A groove wall surface of the receiving groove 54 and the second side wall 34 arranged opposite to each other forms a sealant structure 50. The receiving groove 54 can also be regarded as a sealant space.

[0236] A portion of the first housing 20 is inserted into the receiving groove 54. In an embodiment where the first housing 20 includes a first end wall 22 and a first side wall 23, the end of the first side wall 23 away from the first end wall 22 is inserted into the receiving groove 54. The sealant 40 between the first sealing surface 21 and the second sealing surface 32 is at least partially located within the receiving groove 54.

[0237] In some embodiments, such as Figure 18 , Figure 19 As shown, the thickness of the second end wall 33 at the corresponding position of the receiving groove 54 is less than the thickness of the second end wall 33 at other positions. This receiving groove 54 can be formed by thinning a portion of the second end wall 33, or by integral molding methods such as casting or injection molding.

[0238] In other embodiments, such as Figure 19 , Figure 20 As shown, the receiving groove 54 is recessed from the first surface 31 in a direction away from the first end wall 22, and the surface of the second end wall 33 facing away from the first surface 31 protrudes in a direction away from the first end wall 22 at the corresponding position of the receiving groove 54. This ensures that the thickness of the second end wall 33 at the corresponding position of the receiving groove 54 is the same as the thickness at other positions of the second end wall 33, thereby giving the second end wall 33 better structural strength. This receiving groove 54 can be formed by stamping, bending, or other methods.

[0239] The first sidewall 23 is inserted into the receiving groove 54, which not only limits the first sidewall 23, but also restricts the first sidewall 23 from deforming in the direction of deformation toward or away from the closed space A. The receiving groove 54 is filled with sealant 40, which not only improves the sealing performance, but also connects the first box 20 and the second box 30 in the receiving groove 54. Therefore, it is not necessary to set other connecting parts to connect the first box 20 and the second box 30, which reduces the number of steps in assembling the battery 100 and saves costs.

[0240] In the embodiment where the adhesive barrier structure 50 is disposed on the first surface 31, the second side wall 34 of the second housing 30 can be configured as a low side wall structure, that is, the second side wall 34 of the second housing 30 has a smaller size in the first direction X, which can reduce the space occupied by the second side wall 34 in the first direction X.

[0241] like Figure 22 As shown, in some embodiments, the projection of the receiving groove 54 along the first direction X at least partially overlaps with the projection of the battery cell 10.

[0242] Along the second direction Y, at least a portion of the battery cell 10 extends into the opening of the receiving groove 54. In an embodiment where two receiving grooves 54 are disposed at opposite ends of the second end wall 33 along the second direction Y, the battery cell 10 extends along the second direction Y into the opening of the receiving groove 54, and a portion of the projection of the battery cell 10 in the first direction X is located within the receiving groove 54.

[0243] Projecting along the first direction X, if the projection of the receiving groove 54 at least partially coincides with the projection of the battery cell 10, then the battery cell 10 can make full use of the enclosed space A to increase the energy density of the battery cell 10. The battery cell 10 can also prevent the sealant 40 in the receiving groove 54 from overflowing into the enclosed space A.

[0244] like Figure 2 As shown, in some embodiments, the first housing 20 further includes two third sidewalls 24, which are respectively connected to the two ends of the first end wall 22 along the third direction Z. The two first sidewalls 23 and the two third sidewalls 24 together form the sidewalls of the first housing 20, thereby making the first housing 20 a hollow structure with an opening on one side forming a cavity for accommodating the battery cell 10.

[0245] In some embodiments, the second housing 30 further includes two fourth sidewalls 35, which are respectively connected to the two ends of the second end wall 33 along the third direction Z. The two fourth sidewalls 35 and the two second sidewalls 34 together form the sidewalls of the second housing 30, thereby making the second housing 30 a hollow structure with an opening on one side forming a cavity for accommodating the battery cell 10.

[0246] The third direction Z, the second direction Y, and the first direction X are all perpendicular to each other. The third direction Z can be the length direction of the battery 100. When the battery 100 is used in a heavy truck, the third direction Z can be basically consistent with the length direction of the heavy truck.

[0247] The third sidewall 24 and the second sidewall 34 are provided in a one-to-one correspondence, with the third sidewall 24 located inside the fourth sidewall 35.

[0248] The third sidewall 24 is provided with a third sealing surface (not shown in the figure), and the fourth sidewall 35 is provided with a fourth sealing surface (not shown in the figure). The third and fourth sealing surfaces cooperate to seal and enclose space A. The third sealing surface may intersect with the first surface 31, and the fourth sealing surface may intersect with the first surface 31, so as to reduce the occupancy of the third and fourth sealing surfaces in the third-direction Z space. A sealing space for accommodating sealant 40 can also be formed between the third and fourth sealing surfaces. The sealant 40 can bond the third and fourth sealing surfaces, thereby connecting the first housing 20 and the second housing 30. This eliminates the need for other connecting parts to connect the first housing 20 and the second housing 30 at the corresponding positions of the third and fourth sealing surfaces, which simplifies the assembly steps of the battery 100 and saves costs.

[0249] Of course, the third and fourth sealing surfaces can also be parallel to the first surface 31.

[0250] like Figure 23 As shown, the first housing 20 can be a plate-like structure, and the second housing 30 is a hollow structure with an opening on one side to form a cavity for accommodating the battery cell 10. The first housing 20 forms a first sealing surface 21 on each of its two end faces opposite to the two second side walls 34 along the second direction Y. A space B for sealing adhesive 40 can be formed between the first sealing surface 21 and the second sealing surface 32. The surface of the first housing 20 facing away from the first surface 31 and the end face of the second side wall 34 facing away from the second end wall 33 can be coplanar.

[0251] like Figure 24 As shown, the second housing 30 can be a plate-like structure, and the first housing 20 is a hollow structure with an opening on one side to form a cavity for accommodating the battery cell 10. The second housing 30 forms second sealing surfaces 32 on its two end faces opposite to the two first side walls 23 along the second direction Y. A space B for sealing adhesive 40 can be formed between the first sealing surface 21 and the second sealing surface 32. The surface of the second housing 30 facing away from the first surface 31 and the end face of the first side wall 23 facing away from the first end wall 22 can be coplanar.

[0252] This application also provides an electrical device, which includes the battery 100 provided in any of the above embodiments.

[0253] The electrical device uses the battery 100 with high energy density provided above, thus having a longer battery life and meeting more power needs.

[0254] This application provides a battery 100, which includes a battery cell 10, a first housing 20, and a second housing 30. The battery cell 10 is housed within a closed space A defined by the first housing 20 and the second housing 30. The first housing 20 includes a first end wall 22 and a first side wall 23. The first end wall 22 is connected to the first side wall 23 at both ends along the second direction Y. The two first side walls 23 are arranged at an obtuse angle to the first end wall 22 and are arranged in a V-shape. The second housing 30 includes a second end wall 33 and a second side wall 34. The second end wall 33 and the first end wall 22 are arranged opposite each other along the first direction X. The second end wall 33 is connected to the second side wall 34 at both ends along the second direction Y. The two second side walls 34 are arranged perpendicular to the second end wall 33. The dimensions of the two second side walls 34 along the first direction X are larger than the dimensions of the first side wall 23 along the first direction X. The second housing 30 has a high side wall structure. The first sidewall 23 is located on the side of the second sidewall 34 closest to the enclosed space A. A portion of the surface of the first sidewall 23 away from the enclosed space A forms a first sealing surface 21, and a portion of the surface of the second sidewall 34 close to the enclosed space A forms a second sealing surface 32. A receiving space for sealing adhesive 40 is formed between the first sealing surface 21 and the second sealing surface 32. The surface of the second endwall 33 facing the enclosed space A is the first surface 31, which supports the battery cell 10. The first inner surfaces of both second sidewalls 34 are provided with first protrusions 51. The ends of the two first sidewalls 23 of the first housing 20 away from the first endwall 22 are respectively supported by the first abutment surfaces 511 of the two first protrusions 51 facing away from the second endwall 33. Alternatively, the first inner surfaces of both second sidewalls 34 are provided with grooves 52, which extend to the ends of the second sidewalls 34 away from the second endwall 33. The ends of the two first sidewalls 23 of the first housing 20 away from the first endwall 22 are respectively inserted into the two grooves 52 and abut against the groove wall surface of the groove 52.

[0255] This application provides a battery 100, which includes a battery cell 10, a first housing 20, and a second housing 30. The battery cell 10 is housed within a closed space A defined by the first housing 20 and the second housing 30. The first housing 20 includes a first end wall 22 and a first side wall 23. The first end wall 22 is connected to both ends of the first side wall 23 along a second direction Y, and both first side walls 23 are arranged perpendicularly to the first end wall 22. The second housing 30 includes a second end wall 33 and a second side wall 34. The second end wall 33 and the first end wall 22 are arranged opposite each other along a first direction X. The second end wall 33 is connected to both ends of the second end wall 33 along the second direction Y, and both second side walls 34 are arranged perpendicularly to the second end wall 33. The dimensions of the two second side walls 34 along the first direction X are smaller than the dimensions of the first side wall 23 along the first direction X, and the second housing 30 has a low side wall structure. The first sidewall 23 is located on the side of the second sidewall 34 closest to the enclosed space A. A portion of the surface of the first sidewall 23 away from the enclosed space A forms a first sealing surface 21, and a portion of the surface of the second sidewall 34 close to the enclosed space A forms a second sealing surface 32. A receiving space for accommodating sealant 40 is formed between the first sealing surface 21 and the second sealing surface 32. The surface of the second endwall 33 facing the enclosed space A is a first surface 31, which supports the battery cell 10. The first surface 31 has two second protrusions 53, which are spaced apart along the second direction Y. The second protrusions 53 are sealant-blocking structures 50. The ends of the two first sidewalls 23 of the first housing 20 away from the first endwall 22 are respectively inserted between the two second protrusions 53 and the two second sidewalls 34.

[0256] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery, characterized in that, include: Battery cell; The first housing includes a first sealing surface; The second housing includes a first surface and a second sealing surface, wherein the first surface is used to support the battery cell; The first housing and the second housing together enclose a closed space to accommodate the battery cell, and the first sealing surface and the second sealing surface cooperate to seal the closed space; The first sealing surface intersects with the first surface, and the second sealing surface intersects with the first surface.

2. The battery according to claim 1, characterized in that, At least one of the first sealing surface and the second sealing surface is perpendicular to the first surface.

3. The battery according to claim 1, characterized in that, One of the first sealing surface and the second sealing surface is perpendicular to the first surface, and the other of the first sealing surface and the second sealing surface is not perpendicular to the first surface and intersects with it.

4. The battery according to claim 3, characterized in that, The first sealing surface and the second sealing surface, one of which is perpendicular to the first surface, is located on the side of the other away from the enclosed space.

5. The battery according to claim 4, characterized in that, The second sealing surface is perpendicular to the first surface, and the second sealing surface is located on the side of the first sealing surface away from the enclosed space.

6. The battery according to any one of claims 3-5, characterized in that, The first housing includes a first end wall and a first side wall that are connected to each other, and the first sealing surface is disposed on the first side wall; The second housing includes a second end wall and a second side wall connected to each other. The second end wall has the first surface and is disposed opposite to the first end wall along a first direction, the first direction being perpendicular to the first surface. The second sealing surface is disposed on the second side wall.

7. The battery according to claim 6, characterized in that, The first sealing surface is not perpendicular to the first surface but intersects with it, and the first sidewall and the first endwall are connected at an obtuse angle; or, the second sealing surface is not perpendicular to the first surface but intersects with it, and the second sidewall and the second endwall are connected at an obtuse angle.

8. The battery according to claim 7, characterized in that, The first sealing surface and the second sealing surface together form a space for containing sealant.

9. The battery according to claim 8, characterized in that, Projecting along the first direction, the projection of the adhesive space at least partially overlaps with the projection of the battery cell.

10. The battery according to claim 8, characterized in that, The battery also includes an adhesive-blocking structure, which is disposed at the junction of the enclosed space and the adhesive-containing space.

11. The battery according to claim 10, characterized in that, The adhesive-blocking structure is disposed on the second side wall.

12. The battery according to claim 11, characterized in that, The adhesive barrier structure is a first protrusion protruding from the inner surface of the second sidewall, and the first housing is supported by the first protrusion.

13. The battery according to claim 11, characterized in that, The adhesive barrier structure is a groove provided on the inner surface of the second sidewall, and a portion of the first housing is located within the groove.

14. The battery according to claim 6, characterized in that, The second sidewall is bent from the end of the second end wall in the first direction toward the side away from the battery cell to form a recess, and the first sidewall is inserted into the recess; or, the first sidewall is bent from the end of the first end wall in the first direction toward the side away from the battery cell to form a recess, and the second sidewall is inserted into the recess. The recess is used to accommodate sealant.

15. The battery according to claim 14, characterized in that, Projecting along the first direction, the projection of the concave portion at least partially overlaps with the projection of the battery cell.

16. The battery according to claim 1 or 2, characterized in that, Both the first sealing surface and the second sealing surface are perpendicular to the first surface.

17. The battery according to claim 16, characterized in that, The first housing includes a first end wall and a first side wall that are connected to each other, and the first sealing surface is disposed on the first side wall; The second housing includes a second end wall and a second side wall connected to each other. The second end wall has the first surface and is disposed opposite to the first end wall along a first direction, the first direction being perpendicular to the first surface. The second sealing surface is disposed on the second side wall.

18. The battery according to claim 17, characterized in that, The space between the first sealing surface and the second sealing surface is filled with sealant.

19. The battery according to claim 18, characterized in that, Projecting along the second direction, the projection of the sealant at least partially coincides with the projection of the battery cell, and the second direction is parallel to the first surface and intersects the first sidewall.

20. The battery according to claim 18, characterized in that, The battery also includes a sealant structure, which is disposed in the enclosed space near the first sealing surface and the second sealing surface.

21. The battery according to claim 20, characterized in that, The adhesive barrier structure is disposed on the first surface.

22. The battery according to claim 20, characterized in that, The adhesive barrier structure is a second protrusion protruding from the first surface, and a portion of the first housing is located between the second side wall and the second protrusion.

23. The battery according to claim 1 or 2, characterized in that, The first housing includes a first end wall and a first side wall connected to each other, and the first sealing surface is disposed on the first side wall. The second housing includes a second end wall, and the first end wall and the second end wall are arranged opposite to each other in a first direction, the first direction being perpendicular to the first surface. The second end wall is provided with a receiving groove, the second sealing surface is provided on the groove wall of the receiving groove, the first side wall is inserted into the receiving groove, and the receiving groove is filled with sealant.

24. The battery according to claim 23, characterized in that, Projecting along the first direction, the projection of the receiving groove at least partially overlaps with the projection of the battery cell.

25. An electrical appliance, characterized in that, Includes the battery according to any one of claims 1-24.

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