Battery and electrical apparatus

Abstract

A battery (100) and an electrical apparatus, which are applicable to the technical field of batteries (100). The electrical apparatus comprises a battery (100), the battery (100) comprises a battery unit (10) and a case (20), and the battery unit (10) comprises at least one battery cell (1). The case (20) is provided with two first walls (21) opposite to each other in a first direction (Y), the two first walls (21) are connected to a first connecting member (22) used for being connected to an external device. In the first direction (Y), the battery unit (10) is arranged between the two first walls (21) and is limited by means of the first walls (21). When the first connecting member (22) is connected to the external device, the external device can constrain the relative positions of the two first walls (21) in the first direction (Y), so that the two first walls (21) can constrain the battery unit in the first direction (Y), to effectively resist the expansion of the battery cell (1) while reducing or eliminating the need for expansion beams and similar structures, thereby lowering the cost of the battery (100).

Description

Batteries and electrical devices

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application with application number 202410009891.0 and application name “Battery and Electrical Device” filed with the State Intellectual Property Office of the People’s Republic of China on January 3, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0004] In the related art, a battery includes a box assembly and battery cells disposed in the box assembly.

[0005] In some cases, expansion beams, connecting structures, and tie bars are installed within the box assembly to limit the expansion force of the battery cells. This structure requires more components within the battery, resulting in higher battery costs.

[0006] Summary of the Invention

[0007] In view of the above problems, an object of the embodiments of the present application is to provide a battery and an electrical device that can improve the problem of high battery costs.

[0008] The technical solution adopted in the embodiment of this application is:

[0009] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0010] A battery unit comprising at least one battery cell;

[0011] The box body is provided with two first walls opposite to each other along a first direction, and both first walls are connected with a first connector for connecting to an external device; in the first direction, the battery unit is arranged between the two first walls and is limited by the first walls.

[0012] The battery provided in an embodiment of the present application has a first connector for connecting to an external device connected to two first walls of the housing that are opposite each other along a first direction. The battery cell is located between the two first walls along the first direction, and the first walls are used to limit the position of the battery cell. When the first connector is connected to the external device, the external device can constrain the relative position of the first connector on the two first walls in the first direction, thereby constraining the relative position of the two first walls in the first direction. In this way, the two first walls can constrain the battery cell along the first direction to effectively resist the expansion of the battery cell in the first direction. This arrangement, while effectively resisting the expansion force of the battery cell, reduces or eliminates the need for structures such as expansion beams, helping to reduce the cost of the battery.

[0013] In some embodiments, there are multiple battery cells, and the wall with the largest area among all the walls of at least some of the battery cells is perpendicular to the first direction.

[0014] In this arrangement, under the restraining action of external equipment on the first connecting parts on the two first walls, the two first walls can restrain the battery cell along the first direction to effectively resist the expansion of the battery cells of the battery cell along the first direction, that is, they can effectively resist the expansion force of the large surface of at least part of the battery cells, thereby improving the product competitiveness of the battery.

[0015] In some embodiments, a projection of the first connector projected onto the first wall along the first direction at least partially overlaps with a projection of at least part of the battery cells projected onto the first wall along the first direction.

[0016] With this arrangement, the force exerted by the external device on the first connector can effectively resist the expansion force of at least a portion of the wall of the battery cell along the first direction, thereby effectively improving the product competitiveness of the battery.

[0017] In some embodiments, the battery unit includes at least one group of multiple battery cells arranged along a first direction, all battery cells in each group abut against each other in sequence along the first direction, and the wall with the largest area among all walls of the battery cells is perpendicular to the first direction.

[0018] In this arrangement, under the restraining action of external equipment on the first connecting parts on the two first walls, the two first walls can restrain the battery cell along the first direction to effectively resist the expansion of the battery cells of the battery cell along the first direction, that is, it can effectively resist the large-area expansion of all battery cells in each group, thereby improving the product competitiveness of the battery.

[0019] In some embodiments, a projection of the battery cells of each group projected onto the first wall along the first direction is at least partially overlapped with a projection of at least one first connector projected onto the first wall along the first direction.

[0020] With this arrangement, the force exerted by the external device on the first connector can effectively resist the expansion force of the wall of each group of battery cells along the first direction, thereby effectively improving the product competitiveness of the battery.

[0021] In some embodiments, the battery further includes a cover connected to one end of the box along a second direction, the second direction intersects the first direction, and the battery unit is disposed in a space enclosed by the box and the cover.

[0022] The cover is connected to the box body, so that the box body can constrain the relative positions of the two first walls in the first direction through the connection between the cover body and the box body, so that the two first walls can constrain the battery cell along the first direction to effectively resist the expansion of the battery cell along the first direction, which is conducive to improving the product competitiveness of the battery.

[0023] In some embodiments, the cover body is provided with second connecting members on two opposite sides along the first direction, and the second connecting members are used to connect to the first connecting member and an external device.

[0024] Such a configuration allows the second connecting member to be connected to the first connecting member and then to the external device, which can improve the connection strength between the box body, the cover body and the external device, thereby increasing the restraint force on the first wall, and further increasing the resistance to the expansion force of the battery cell, thereby effectively improving the problem of battery cell expansion, thereby improving the product competitiveness of the battery.

[0025] In some embodiments, the battery unit extends out of the box toward the cover along the second direction.

[0026] In this way, the restraining force of the box assembly composed of the box body and the cover body on the battery unit can be improved, thereby effectively improving the resistance to the expansion force of the battery unit.

[0027] In some embodiments, a third connector is provided on one edge of the box body along the second direction toward the cover body, and a fourth connector is provided on one edge of the cover body along the second direction toward the box body, and the third connector and the fourth connector are connected.

[0028] Such an arrangement can improve the restraint force of the box assembly composed of the box body and the cover body on the battery unit, thereby effectively improving the resistance to the expansion force of the battery unit.

[0029] In some embodiments, the first connecting member is disposed on the third connecting member; and / or the second connecting member is disposed on the fourth connecting member.

[0030] Such an arrangement makes it very simple to form the first connector on the box body and / or makes it very simple to form the second connector on the cover body.

[0031] In some embodiments, a first fixing structure is provided between the cover and the battery unit, and the first fixing structure fixes the battery unit to the cover;

[0032] And / or, a second fixing structure is provided between the box body and the battery unit, and the second fixing structure fixes the battery unit to the box body.

[0033] With this arrangement, the battery cell is fixed to the cover via the first fixing structure, so that the cover can provide a certain restraint on the battery cell, helping to resist the expansion force of the battery cell. And / or, the battery cell is fixed to the case via the second fixing structure, so that the case can provide a certain restraint on the battery cell, helping to resist the expansion force of the battery cell.

[0034] In some embodiments, the first fixing structure and / or the second fixing structure includes an adhesive layer.

[0035] This arrangement allows the battery cells to be bonded to the cover and / or box via the adhesive layer, reducing the cost of securing the battery cells to the cover and / or box. Furthermore, the process of securing the battery cells to the cover and / or box is very simple and easy to implement.

[0036] In some embodiments, a second wall is provided on one side of the box along the third direction, the second wall is used to limit the battery unit along the third direction, and the second wall is connected to a fifth connector for connecting to an external device; the third direction intersects with the first direction and the second direction in pairs.

[0037] In this way, the expansion of the battery cells can be resisted in multiple directions, which is beneficial to improving the product competitiveness of the battery and reducing the cost.

[0038] In some embodiments, a restraining member is provided in the box body and is opposite to the second wall along the third direction. Along the third direction, the battery unit is located between the second wall and the restraining member and is limited by the second wall and the restraining member.

[0039] Alternatively, the box body is provided with a third wall opposite to the second wall along a third direction, the third wall is connected to a sixth connector for connecting to an external device, and along the third direction, the battery unit is located between the second wall and the third wall and is limited by the second wall and the third wall.

[0040] This arrangement allows the external device and the restraining member to jointly resist expansion of the battery cell in the third direction. Alternatively, the external device can constrain the relative positions of the fifth and sixth connectors in the third direction, thereby constraining the relative positions of the second and third walls in the third direction, thereby effectively resisting expansion of the battery cell in the third direction. This approach allows for multi-faceted resistance to battery cell expansion, at a low cost and with high product competitiveness.

[0041] In some embodiments, a filling piece is provided between at least one first wall and the battery cell along the first direction, and the filling piece abuts against the first wall and the battery cell.

[0042] Such an arrangement enables the first wall to better transmit the restraining force to the battery unit, so as to restrain the expansion of the battery unit in the first direction.

[0043] In some embodiments, the filling piece includes one or more of a foam material piece, an elastic structure, and a plastic piece.

[0044] Such an arrangement allows the filler to be well filled between the first wall and the battery cell, which helps to transmit the restraining force of the first wall to the battery cell, thereby effectively improving the effective resistance to the expansion of the battery cell.

[0045] In some embodiments, the battery further includes a thermal management component disposed in the housing, and the thermal management component is used to exchange heat with the battery cells.

[0046] Such an arrangement can realize heating or cooling of the battery, thereby improving the product competitiveness of the battery.

[0047] In a second aspect, an embodiment of the present application provides an electrical device, comprising the battery provided in any embodiment of the first aspect.

[0048] The electrical device provided in the embodiment of the present application, by adopting the battery involved above, can resist the expansion of the battery cell along the first direction through the electrical device itself. On the basis of being able to effectively resist the expansion force of the battery cell, the setting of structures such as the expansion beam is eliminated, which helps to reduce the cost of the battery and improve the competitiveness of the product.

[0049] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0051] FIG1 is a schematic diagram of a vehicle provided in some embodiments of the present application;

[0052] FIG2 is a schematic structural diagram of a battery provided in some embodiments of the present application;

[0053] FIG3 is an exploded schematic diagram of a battery provided in some embodiments of the present application;

[0054] FIG4 is a diagram showing the coordination structure of a battery box and a battery unit according to some embodiments of the present application;

[0055] Figure 5 is an enlarged view of point A in Figure 4;

[0056] FIG6 is a top view of FIG4;

[0057] FIG7 is an enlarged view of point B in FIG3 ;

[0058] FIG8 is a top view of the battery box and battery cells provided in other embodiments of the present application;

[0059] FIG9 is a top view of the battery case and battery cells provided in some other embodiments of the present application.

[0060] Among them, the figure marks in the figure are: 1000-vehicle; 100-battery; 200-controller; 300-motor; 400-body; 10-battery unit; 1-battery cell; 20-box; 21-first wall; 22-first connecting member; 2202-first connecting hole; 23-third connecting member; 2301-third connecting hole; 24-second wall; 25-fifth connecting member; 26-third wall; 27-sixth connecting member; 30-cover; 31-second connecting member; 3101-second connecting hole; 32-fourth connecting member; 3201-fourth connecting hole; 33-fourth wall; 40-filling member; 50-restraint; Y-first direction; Z-second direction; X-third direction. DETAILED DESCRIPTION

[0061] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0062] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0064] In the description of this application, "a plurality of" means more than two, and unless otherwise specifically defined, "more than two" includes two. Accordingly, "a plurality of groups" means more than two groups, including two groups.

[0065] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0066] In the description of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the related objects are in an "or" relationship.

[0067] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0068] As the application areas of power batteries continue to expand, the requirements for their battery life are also increasing. To meet these high battery life requirements, multiple battery cells are usually connected in series, parallel, or hybrid to expand the capacity or power of the power battery.

[0069] During the charge and discharge process, the battery cells will expand and easily cause the battery box assembly to deform, affecting the sealing performance of the box assembly.

[0070] In some cases, expansion beams and connecting structures are provided within the housing assembly, with the battery cells resting between the two expansion beams. The connecting structure is connected to the two expansion beams to tension the two expansion beams toward each other. This allows the two expansion beams to resist the expansion force of the battery cells under the tensioning action of the connecting structure. Furthermore, tie bars can be provided on the shoulders of the battery cells to resist the expansion force of the battery cells.

[0071] However, this structure requires more components to be used inside the battery, resulting in a higher cost of the battery.

[0072] Based on the above considerations, an embodiment of the present application provides a battery and an electrical device. A first connector for connecting to an external device is connected to two first walls of a housing that are opposite to each other along a first direction. The battery unit is located between the two first walls along the first direction, and the first walls are used to limit the position of the battery unit. When the first connector is connected to an external device, the external device can constrain the relative position of the first connectors on the two first walls in the first direction, thereby constraining the relative position of the two first walls in the first direction. In this way, the two first walls can constrain the battery unit along the first direction to effectively resist the expansion of the battery unit along the first direction. This arrangement, while effectively resisting the expansion force of the battery unit, eliminates the need for structures such as expansion beams, helping to reduce the cost of the battery.

[0073] In some embodiments, the battery involved in the embodiments of the present application can be used in an electrical device that uses the battery as a power source.

[0074] Electrical devices include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, and so on. Electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. Vehicles can be categorized by power source as fuel-powered, gas-powered, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Vehicles can be categorized by drive mode as front-wheel drive, rear-wheel drive, or four-wheel drive.

[0075] The battery involved in the embodiments of the present application may be a single physical module including one or more battery cells to provide higher voltage and capacity.

[0076] For ease of description, the embodiments of the present application are described using a vehicle as an example of an electrical device.

[0077] Please refer to FIG1 , which is a schematic diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 includes a vehicle body 400 and a battery 100 .

[0078] The vehicle body 400 is the main supporting component of the vehicle 1000. The vehicle body 400 has an engine cabin and a driver's cabin. The engine cabin is used to accommodate the battery 100, motor 300, controller 200, etc. of the vehicle 1000, and the driver's cabin is used to provide operating space and riding space for the driver and passengers. When the vehicle 1000 is a front-wheel drive vehicle, the engine cabin is arranged at the head of the vehicle body 400, that is, the engine cabin is a front engine cabin. When the vehicle 1000 is a rear-wheel drive vehicle, the engine cabin is arranged at the rear of the vehicle body 400, that is, the engine cabin is a rear engine cabin. When the vehicle 1000 is a four-wheel drive vehicle, the engine cabin is divided into a front engine cabin and a rear engine cabin. The front engine cabin is arranged at the head of the vehicle body 400, and the rear engine cabin is arranged at the rear of the vehicle body 400. The driver's cabin is arranged between the head and the rear of the vehicle body 400.

[0079] The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0080] In some embodiments, the battery 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0081] Please continue to refer to Figures 2 and 3. Figure 2 is a schematic diagram of the structure of a battery 100 provided in some embodiments of the present application, and Figure 3 is an exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a housing assembly and battery cells 10. The housing assembly has an internal space, and the battery cells 10 are accommodated in the internal space of the housing assembly.

[0082] The box assembly may include a box body 20 and a cover body 30. The box body 20 and the cover body 30 cover each other and together define the internal space of the box assembly. In some possible designs, as shown in Figures 2 and 3, the box body 20 and the cover body 30 may both be hollow structures with an opening at one end, and the open side of the box body 20 covers the open side of the cover body 30, so that the box body 20 and the cover body 30 together define the internal space of the box assembly; or, in other possible designs, the box body 20 may be a hollow structure with an opening at one end, and the cover body 30 is a plate-like structure, and the cover body 30 covers the open side of the box body 20, so that the box body 20 and the cover body 30 together define the internal space of the box assembly. Among them, the box assembly composed of the box body 20 and the cover body 30 can be of various shapes, such as a cylinder, a cuboid, etc.

[0083] In some embodiments, at least one of the case 20 and the cover 30 of the battery 100 may serve as part of the body 400 of the vehicle 1000. For example, a portion of the cover 30 may serve as at least a portion of the chassis of the body 400, or a portion of the cover 30 may serve as at least a portion of a cross member or a longitudinal member of the body 400.

[0084] The battery unit 10 includes a battery cell 1. The number of battery cells 1 in the battery unit 10 can be one or more. When there are multiple battery cells 1, the multiple battery cells 1 are connected in series, in parallel, or in hybrid mode through a busbar. Hybrid mode means that the multiple battery cells 1 are connected in both series and parallel mode.

[0085] In some embodiments, multiple battery cells 1 can be connected in series, in parallel or in mixed connection to form a whole to constitute a battery unit 10, and then the battery unit 10 formed by multiple battery cells 1 is directly accommodated in the internal space of the above-mentioned box assembly, as shown in Figures 2 and 3.

[0086] In other embodiments, multiple battery cells 1 may be connected in series, in parallel, or in mixed series, and then arranged and fixed to form a battery module, that is, a battery unit 10 , which is accommodated in the internal space of the box assembly.

[0087] In some other embodiments, multiple battery cells 1 can be connected in series, in parallel or mixed, and arranged and fixed to form multiple battery modules. The multiple battery modules are then connected in series, in parallel or mixed to form a whole, that is, to form a battery unit 10, and accommodated in the internal space of the above-mentioned box assembly.

[0088] As an example, a plurality of battery cells 1 may be fixed by rolling strips, etc. to form a battery module. As another example, a plurality of battery cells 1 may be fixed by end plates, side plates, etc. to form a battery module.

[0089] It is understood that the battery unit 10 can be a single battery cell 1; it can also be a whole formed by multiple battery cells 1 connected in series, parallel, or mixed; it can also be a battery module formed by multiple battery cells 1 connected in series, parallel, or mixed and arranged in a fixed manner; it can even be a battery module formed by multiple battery cells 1 first connected in series, parallel, or mixed and arranged in a fixed manner, and then multiple battery modules are further connected in series, parallel, or mixed to form a whole. In other words, the battery unit 10 is the whole formed by all the battery cells 1 in the battery 100.

[0090] A battery cell 1 is the smallest unit that stores and outputs electrical energy. It can be a secondary battery or a primary battery. It can be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. It can be cylindrical, flat, rectangular, or have other shapes.

[0091] Please refer to Figures 2 to 5 together, and in conjunction with other accompanying drawings. Figure 4 is a diagram of the matching structure of the case 20 and the battery cell 10 of the battery 100 provided in some embodiments of the present application, and Figure 5 is an enlarged view of point A in Figure 4. The battery 100 provided in an embodiment of the present application includes a battery cell 10 and a case 20. The battery cell 10 includes at least one battery cell 1. The case 20 is provided with two first walls 21 opposite to each other along the first direction Y. Both first walls 21 are connected to a first connecting member 22, and the first connecting member 22 is used to connect to an external device. In the first direction Y, the battery cell 10 is arranged between the two first walls 21. In addition, in the first direction Y, the battery cell 10 is limited by the first wall 21.

[0092] The housing 20 is a structure for housing the battery cells 10. Specifically, the housing 20 is used to house the battery cells 1. In some possible designs, as shown in Figures 2 and 3, the housing 20 and the cover 30 may define a space for housing the battery cells 10 (i.e., the interior space of the housing 20 assembly), such that the housing 20 and the cover 30 together seal the battery cells 10. As an example, as shown in Figures 2 to 4, a portion of the battery cells 10 is housed within the housing 20, while another portion of the battery cells 10 is housed within the cover 30. For example, as shown in Figures 2 to 4, in the battery cell 10, a portion of each battery cell 1 is housed within the housing 20, while another portion of each battery cell 1 is housed within the cover 30. For another example, the battery cell 10 includes multiple battery cells 1, and a portion of the battery cells 1 is housed within the housing 20, while another portion of the battery cells 1 is housed within the cover 30. As another example, the battery cell 10 is completely housed within the housing 20. In some other possible designs, the box 20 may also be used to accommodate the battery cell 10 alone, so as to separately enclose the battery cell 10 without having to cooperate with the cover 30 .

[0093] The first wall 21 is a side wall of the box body 20 and is a solid wall.

[0094] The box body 20 is provided with two first walls 21 opposite to each other along the first direction Y, which means that the two first walls 21 of the box body 20 are spaced apart and opposite to each other along the first direction Y. It can be understood that the side walls of the box body 20 on two opposite sides along the first direction Y are the first walls 21 .

[0095] The two first walls 21 are both connected with a first connecting member 22 , and the number of the first connecting members 22 on each first wall 21 can be one or more.

[0096] In the first direction Y, the battery unit 10 is disposed between the two first walls 21 , which means that one of the first walls 21 , the battery unit 10 , and the other first wall 21 are distributed in sequence along the first direction Y.

[0097] In the first direction Y, the battery cell 10 is restrained by the first walls 21, meaning that the battery cell 10 is located between the two first walls 21 and is restrained in the first direction Y by the two first walls 21. In other words, the battery cell 10 is restrained between the two first walls 21 along the first direction Y. In some possible designs, the two first walls 21 respectively abut against opposite sides of the entirety of all the battery cells 1 (i.e., the battery cell 10) along the first direction Y. In other words, one first wall 21 abuts against one side of the entirety of all the battery cells 1 (i.e., the battery cell 10) along the first direction Y, and the other first wall 21 abuts against the other side of the entirety of all the battery cells 1 (i.e., the battery cell 10) along the first direction Y. In this way, the first walls 21 directly provide a restraining force to the battery cell 10 along the first direction Y, thereby restraining the battery cell 10 between the two first walls 21 along the first direction Y. In other possible designs, a filler 40, described below, is disposed between at least one first wall 21 and the battery cell 10. One side of the filler 40 along the first direction Y abuts the battery cell 10, specifically, the adjacent battery cell 1. The other side of the filler 40 along the first direction Y abuts the first wall 21. In this way, the first wall 21 provides a restraining force along the first direction Y to the battery cell 10 via the filler 40, thereby confining the battery cell 10 between the two first walls 21. As an example, as shown in Figures 3 and 4, a filler 40 is disposed between both first walls 21 and the battery cell 10.

[0098] The first direction Y may be parallel to the Y axis, wherein the X axis, the Y axis, and the Z axis constitute a spatial coordinate system, the X axis and the Y axis are perpendicular, the X axis and the Z axis are perpendicular, and the Y axis and the Z axis are perpendicular.

[0099] The first connector 22 is a component of the housing 20 used to connect to external devices. The first connector 22 can be integrally connected to the first wall 21 or separately connected to the first wall 21 by welding, bonding, bolting, or the like.

[0100] The external device can be any device that needs to be fixed to the battery 100, such as a portion of the electrical device mentioned above. As an example, the external device can be the body 400 of the vehicle 1000. That is, when the battery 100 is mounted on the vehicle 1000, the first connector 22 is connected to the body 400, indicating that the battery 100 is mounted to the body 400.

[0101] In the battery 100 provided in an embodiment of the present application, two first walls 21 of the housing 20 that are opposite each other along a first direction Y are each connected to a first connector 22. The first connector 22 is used to connect to an external device. The battery cell 10 is located between the two first walls 21 along the first direction Y and is restrained by the two first walls 21. Based on this, the first connector 22 can be connected to the external device to secure the battery 100 to the external device. When the first connector 22 is connected to the external device, the portion of the external device that is connected to the first connector 22 can constrain the position of the first connector 22, that is, constrain the relative position of the first connectors 22 on the two first walls 21 in the first direction Y, thereby constraining the distance between the first connectors 22 on the two first walls 21 in the first direction Y. Furthermore, the relative position of the two first walls 21 in the first direction Y can be constrained, thereby constraining the distance between the two first walls 21 in the first direction Y. In this way, the two first walls 21 can constrain the battery cell 10 along the first direction Y, effectively resisting the expansion of the battery cells 1 of the battery cell 10 along the first direction Y. With such a configuration, the battery 100 provided in the embodiment of the present application can effectively resist the expansion force of the battery cell 1 while eliminating the need for structures such as expansion beams, thereby helping to reduce the cost of the battery 100 and improving the product competitiveness of the battery 100.

[0102] Furthermore, expansion beams and the like are provided within the battery 100 to resist expansion of the battery cells 1, which not only increases the cost of the battery 100 but also occupies a large space within the battery 100. Therefore, by omitting the expansion beams and other structures, the volume utilization of the battery 100 is improved, thereby helping to increase the energy density of the battery 100.

[0103] In some embodiments, please refer to FIG3 and FIG4 together with other drawings. Each first wall 21 is connected to a plurality of first connecting members 22 , and the plurality of first connecting members 22 of each first wall 21 are spaced apart along a third direction X mentioned below.

[0104] The third direction X mentioned below may be parallel to the X-axis.

[0105] With such a configuration, the box body 20 can be connected to an external device through multiple first connectors 22, which can improve the connection reliability between the box body 20 and the external device, and further improve the restraint force of the external device on the first wall 21 in the first direction Y, thereby effectively resisting the expansion force of the battery cell 1, thereby helping to improve the product competitiveness of the battery 100.

[0106] In some embodiments, please refer to Figures 3 to 6 in conjunction with other figures. Figure 6 is a top view of the battery housing 20 and battery cell 10 of some embodiments of the present application, shown along the second direction Z. There are multiple battery cells 1, and the largest wall surface among all walls of at least some of the battery cells 1 is perpendicular to the first direction Y.

[0107] The wall surface of the battery cell 1 perpendicular to the first direction Y is at least one of the two opposing walls of the battery cell 1 along the first direction Y. That is, at least one of the two opposing walls of at least a portion of the battery cell 1 along the first direction Y is the wall surface with the largest area among all the walls of the portion of the battery cell 1.

[0108] It is understandable that, in a portion of the battery cells 1 of the battery unit 10, the wall with the largest area among all the walls of the battery cell 1 is perpendicular to the first direction Y, that is, at least one of the two opposing walls of the battery cell 1 along the first direction Y is the largest wall among all the walls of the battery cell 1. Alternatively, in all the battery cells 1 of the battery unit 10, the wall with the largest area among all the walls of each battery cell 1 is perpendicular to the first direction Y, that is, at least one of the two opposing walls of each battery cell 1 along the first direction Y is the largest wall among all the walls of the battery cell 1.

[0109] At least one of the two opposite walls of the battery cell 1 along the first direction Y is the wall with the largest area among all the walls of the battery cell 1. It can be that at least one of the two opposite walls of the battery cell 1 along the first direction Y is larger than the other walls of the battery cell 1; or at least one of the two opposite walls of the battery cell 1 along the first direction Y is larger than a part of the other walls of the battery cell 1 and is equal to another part of the other walls of the battery cell 1.

[0110] By adopting the above technical solution, at least one of the two opposing walls of at least a portion of the battery cells 1 along the first direction Y serves as the larger surface of the battery cell 1, which is the surface most susceptible to expansion. With this arrangement, when external equipment constrains the first connectors 22 on the two first walls 21, the two first walls 21 can constrain the battery unit 10 along the first direction Y, effectively resisting expansion of the battery cells 1 of the battery unit 10 along the first direction Y. This effectively resists the expansion force of at least a portion of the larger surface of the battery cells 1, thereby improving the product competitiveness of the battery 100.

[0111] In some embodiments, please refer to Figures 3 to 6 in conjunction with other figures. A battery unit 10 includes at least one group of multiple battery cells 1 arranged along a first direction Y. All battery cells 1 in each group are aligned sequentially along the first direction Y. Furthermore, the largest wall surface of all battery cell 1 walls is perpendicular to the first direction Y.

[0112] The battery unit 10 includes at least one group of multiple battery cells 1 arranged along the first direction Y, which means that the battery unit 10 includes at least one group of battery cells 1 , and each group of battery cells 1 includes multiple battery cells 1 arranged along the first direction Y.

[0113] It can be understood that at least one of the two wall surfaces of the battery cell 1 that are opposite to each other along the first direction Y is the wall surface with the largest area among all the wall surfaces of the battery cell 1 .

[0114] At least one of the two opposing walls of the battery cell 1 along the first direction Y is the wall with the largest area among all the walls of the battery cell 1. This may be so that at least one of the two opposing walls of the battery cell 1 along the first direction Y is larger than the other walls of the battery cell 1; or at least one of the two opposing walls of the battery cell 1 along the first direction Y is larger than a portion of the other walls of the battery cell 1 and equal to another portion of the other walls of the battery cell 1. In other words, at least one of the two opposing walls of each battery cell 1 along the first direction Y is the larger surface of the battery cell 1.

[0115] All the battery cells 1 of each group abut against each other in sequence along the first direction Y, so that the large surfaces of all the battery cells 1 of each group abut against each other in sequence.

[0116] By arranging all battery cells 1 of each group to abut against each other in sequence along the first direction Y, and with at least one of the two opposing walls of each battery cell 1 along the first direction Y being the larger surface of the battery cell 1, the two first walls 21 can constrain the battery unit 10 along the first direction Y under the restraining effect of external equipment on the first connectors 22 on the two first walls 21, thereby effectively resisting expansion of the battery cells 1 of the battery unit 10 along the first direction Y. This effectively resists the larger surface expansion of all battery cells 1 of each group, thereby improving the product competitiveness of the battery 100.

[0117] In some embodiments, as shown in FIG3 , FIG4 and FIG6 , and in combination with other drawings, a plurality of battery cells 1 constitute a plurality of groups of battery cells 1 , and the plurality of groups of battery cells 1 are sequentially distributed along a third direction X mentioned below.

[0118] In some embodiments, referring to Figures 3 to 5 in conjunction with other figures, the projection of the first connector 22 along the first direction Y onto the first wall 21 at least partially overlaps with the projection of at least some battery cells 1 along the first direction Y onto the first wall 21 .

[0119] At least some of the battery cells 1 refer to at least one battery cell 1 , and may be one or more battery cells 1 .

[0120] The projection of the first connector 22 along the first direction Y onto the first wall 21 is arranged to at least partially overlap with the projection of at least one battery cell 1 along the first direction Y onto the first wall 21. That is, the orthographic projection of the first connector 22 on the first wall 21 overlaps with the orthographic projection of at least one battery cell 1 on the first wall 21. It is understandable that at least a portion of the orthographic projection of the first connector 22 on the first wall 21 and at least a portion of the orthographic projection of the at least one battery cell 1 on the first wall 21 are located at the same position to achieve overlap.

[0121] With this arrangement, the force exerted by the external device on the first connecting member 22 can effectively resist the expansion force of at least a portion of the wall of the battery cell 1 along the first direction Y, thereby effectively improving the product competitiveness of the battery 100 .

[0122] In some embodiments, referring to Figures 3 to 5 in conjunction with other figures, the projection of each group of battery cells 1 along the first direction Y onto the first wall 21 is at least partially overlapped with the projection of at least one first connector 22 along the first direction Y onto the first wall 21 .

[0123] It can be understood that the projection of each first connector 22 projected onto the first wall 21 along the first direction may at least partially overlap with the projection of at least one group of battery cells 1 projected onto the first wall 21 along the first direction Y.

[0124] With this arrangement, the force exerted by the external device on the first connecting member 22 can effectively resist the expansion force of the wall surface of each group of battery cells 1 along the first direction Y, thereby effectively improving the product competitiveness of the battery 100.

[0125] In some embodiments, referring to Figures 2 and 3 in conjunction with other figures, the battery 100 further includes a cover 30 connected to one end of the housing 20 along a second direction Z intersecting the first direction Y. The battery cell 10 is disposed within the space enclosed by the housing 20 and the cover 30.

[0126] It can be understood that the box body 20 is a hollow structure with an opening at one end.

[0127] The cover 30 is a structure used to cover the box body 20 to accommodate the battery unit 10 together with the box body 20. The cover 30 can be a hollow structure with an opening at one end, or a plate-like structure.

[0128] The second direction Z may be parallel to the Z axis.

[0129] The intersection of the first direction Y and the second direction Z means that the first direction Y and the second direction Z may form an angle greater than 0° and less than 180°, that is, the first direction Y and the second direction Z are not parallel. The first direction Y and the second direction Z may be perpendicular to each other or not perpendicular to each other. The first direction Y and the second direction Z may be intersecting directions located on the same plane or on different planes, and the projection of the second direction Z on the plane containing the first direction Y may intersect with the first direction Y.

[0130] The cover body 30 is connected to the box body 20, so that the box body 20 can constrain the relative positions of the two first walls 21 in the first direction Y through the connection between the cover body 30 and the box body 20, so that the two first walls 21 can constrain the battery unit 10 along the first direction Y, so as to effectively resist the expansion of the battery cell 1 of the battery unit 10 along the first direction Y, which is beneficial to improving the product competitiveness of the battery 100.

[0131] In some embodiments, please refer to Figures 2 to 7 in conjunction with other figures. Figure 7 is an enlarged view of point B in Figure 3. The cover 30 is provided with second connectors 31 on opposite sides along the first direction Y. The second connectors 31 are used to connect to the first connector 22 and external devices.

[0132] The second connecting member 31 is a component of the cover 30 used for connecting to an external device.

[0133] It can be understood that the second connecting member 31 on one side of the cover body 30 along the first direction Y can be connected to the first connecting member 22 on one of the first walls 21 and simultaneously connected to an external device. The second connecting member 31 on the other side of the cover body 30 along the first direction Y can be connected to the first connecting member 22 on the other first wall 21 and simultaneously connected to an external device.

[0134] The second connector 31 can be connected to the first connector 22 and the external device in a variety of ways. As an example, as shown in Figures 5 and 7, the first connector 22 has a first connection hole 2202, and the second connector 31 has a second connection hole 3101. Bolts are inserted through the first connection hole 2202 and the second connection hole 3101, and then connected to the external device, thereby connecting the first connector 22, the second connector 31, and the external device. This connects the housing 20, the cover 30, and the external device.

[0135] Such a configuration allows the second connecting member 31 to be connected to the first connecting member 22 and then to the external device, which can improve the connection strength between the box body 20, the cover body 30 and the external device, thereby increasing the restraint force on the first wall 21, and further increasing the resistance to the expansion force of the battery cell 1, thereby effectively improving the problem of expansion of the battery cell 1, thereby improving the product competitiveness of the battery 100.

[0136] The number of the second connectors 31 on one side of the cover 30 along the first direction Y may be one or more. The number of the second connectors 31 may be the same as or different from the number of the first connectors 22, as long as the second connectors 31 can be connected to the first connectors 22 to connect to the external device.

[0137] In some embodiments, please refer to FIG. 2 to FIG. 5 together with other figures. The battery unit 10 extends out of the box 20 along the second direction Z toward the cover 30 .

[0138] As shown in Figure 3, the box body 20 and the cover body 30 are both hollow structures with an opening at one end along the second direction Z. The open side of the cover body 30 along the second direction Z covers the open side of the box body 20 along the second direction Z, so that the box body 20 and the cover body 30 jointly define a space for accommodating the battery cell 10.

[0139] It can be understood that a portion of the battery unit 10 along the second direction Z is accommodated in the box body 20 , and another portion of the battery unit 10 along the second direction Z extends out of the box body 20 toward the cover body 30 to be accommodated in the cover body 30 .

[0140] Specifically, a portion of the battery cell 10 along the second direction Z is housed within the housing 20 and positioned between the two first walls 21 of the housing 20, thereby limiting its position in the first direction Y via the first walls 21. Another portion of the battery cell 10 along the second direction Z extends beyond the first walls 21 of the housing 20 and is housed within the cover 30. The two opposite side walls of the cover 30 along the first direction Y serve as fourth walls 33. Another portion of the battery cell 10 along the second direction Z extends beyond the first walls 21 of the housing 20 and is positioned between the two fourth walls 33 of the cover 30, thereby limiting its position in the first direction Y via the two fourth walls 33.

[0141] The fourth wall 33 is a side wall of the cover 30 and is a solid wall.

[0142] This arrangement allows the two portions of the battery cell 1 along the second direction Z to be accommodated within the housing 20 and the cover 30, respectively. This allows the connection between the housing 20 and the cover 30 to be located between the opposite ends of the battery cell 10 along the second direction Z. The first wall 21 of the housing 20 and the sidewalls of the cover 30 along the first direction Y can both effectively constrain the battery cell 10. This can enhance the restraining force of the housing 20 assembly, formed by the housing 20 and the cover 30, on the battery cell 10, thereby effectively improving resistance to expansion forces of the battery cell 1.

[0143] It should be supplemented here that the two fourth walls 33 of the cover body 30 that are opposite to each other along the first direction Y are both connected to the second connecting member 31. The fourth wall 33 and the second connecting member 31 are connected in one piece or in separate pieces.

[0144] In some embodiments, referring to Figures 3 to 7 in conjunction with other figures, a third connecting member 23 is provided on one edge of the box body 20 along the second direction Z facing the cover body 30, and a fourth connecting member 32 is provided on one edge of the cover body 30 along the second direction Z facing the box body 20. The third connecting member 23 and the fourth connecting member 32 are connected.

[0145] The third connecting member 23 refers to a component on the box body 20 for connecting with the cover body 30 , and the fourth connecting member 32 refers to a component on the cover body 30 for connecting with the box body 20 .

[0146] As an example, as shown in Figures 5 and 7, the third connecting member 23 is provided with a third connecting hole 2301, and the fourth connecting member 32 is provided with a fourth connecting hole 3201. Bolts are sequentially passed through the third connecting hole 2301 and the fourth connecting hole 3201 to connect the third connecting member 23 and the fourth connecting member 32, thereby achieving the connection between the box body 20 and the cover body 30.

[0147] Based on the above structure, the third connector 23 and the fourth connector 32 are located between opposite ends of the battery cell 10 along the second direction Z. That is, the connection between the case 20 and the cover 30 is located between opposite ends of the battery cell 10 along the second direction Z. This arrangement can enhance the restraining force of the case 20 assembly formed by the case 20 and the cover 30 on the battery cell 10, thereby effectively improving the resistance to the expansion force of the battery cells 1 of the battery cell 10.

[0148] It should be noted that the third connecting member 23 can be connected to the first wall 21 or to other side walls of the box body 20; even more, as shown in Figures 2 to 6, the first wall 21 and other side walls of the box body 20 can be connected to the third connecting member 23, that is, the third connecting member 23 is provided on the four edges of the box body 20 along the second direction Z facing the cover body 30. Correspondingly, the fourth connecting member 32 can be connected to the fourth wall 33 or to other side walls of the cover body 30; even more, as shown in Figures 2 and 3, the fourth wall 33 and other side walls of the cover body 30 can be connected to the fourth connecting member 32, that is, the fourth connecting member 32 is provided on the four edges of the cover body 30 along the second direction Z facing the box body 20.

[0149] In some embodiments, please refer to FIG. 3 to FIG. 6 in conjunction with other drawings. The first connecting member 22 is disposed on the third connecting member 23 .

[0150] The first connecting member 22 may be integrally provided on the third connecting member 23 , or may be separately provided on the third connecting member 23 .

[0151] Such an arrangement makes it very simple to form the first connecting member 22 on the box body 20 .

[0152] In some embodiments, please refer to FIG3 and FIG7 together with other drawings. The second connecting member 31 is disposed on the fourth connecting member 32 .

[0153] The second connecting member 31 may be integrally provided on the fourth connecting member 32 , or may be separately provided on the fourth connecting member 32 .

[0154] This arrangement makes it very simple to form the second connecting member 31 on the cover 30 .

[0155] In some embodiments, please refer to FIG. 3 to FIG. 7 together with other drawings. The first connecting member 22 is disposed on the third connecting member 23 , and the second connecting member 31 is disposed on the fourth connecting member 32 .

[0156] In some embodiments, the box body 20 is a sheet metal part; or, the cover body 30 is a sheet metal part; or, both the box body 20 and the cover body 30 are sheet metal parts.

[0157] Such a configuration enables the box body 20 and / or the cover body 30 to have greater structural strength, and can provide greater restraint force on the battery cell 1, thereby effectively resisting the expansion of the battery cell 1, thereby improving the product competitiveness of the battery 100.

[0158] In some embodiments, a first fixing structure is disposed between the cover 30 and the battery cell 10 , and the first fixing structure fixes the battery cell 10 to the cover 30 .

[0159] The first fixing structure is a structure for fixing the battery unit 10 to the cover 30. Specifically, the first fixing structure is used to fix the battery unit 10 to the cover 30.

[0160] With this arrangement, the battery unit 10 is fixed to the cover 30 via the first fixing structure, so that the cover 30 can provide a certain restraint effect on the battery unit 10 , helping to resist the expansion force of the battery unit 1 .

[0161] In some embodiments, a second fixing structure is provided between the box body 20 and the battery unit 10 , and the second fixing structure fixes the battery unit 10 to the box body 20 .

[0162] The second fixing structure is a structure for fixing the battery cell 1 on the box body 20. Specifically, the second fixing structure is used to fix the battery cell 1 on the box body 20.

[0163] With this arrangement, the battery unit 10 is fixed to the box body 20 via the second fixing structure, so that the box body 20 can provide a certain restraint effect on the battery unit 10, which helps to resist the expansion force of the battery unit 1.

[0164] In some embodiments, a first fixing structure is provided between the cover 30 and the battery cell 10, and the first fixing structure fixes the battery cell 10 to the cover 30. In addition, a second fixing structure is provided between the box 20 and the battery cell 10, and the second fixing structure fixes the battery cell 10 to the box 20.

[0165] In some embodiments, the first fixing structure includes an adhesive layer.

[0166] In some possible designs, the adhesive layer may be disposed at one end of the battery cell 10 facing the cover 30 along the second direction Z, so as to be bonded to one side of the cover 30 along the second direction Z. In other possible designs, the adhesive layer may also be disposed at other locations of the battery cell 10 .

[0167] This arrangement allows the battery cell 10 to be bonded to the cover 30 via the adhesive layer, which can reduce the cost of fixing the battery cell 10 to the cover 30. Furthermore, the process of fixing the battery cell 10 to the cover 30 is very simple and easy to implement.

[0168] In some embodiments, the second fixing structure includes an adhesive layer.

[0169] In some possible designs, the adhesive layer may be provided at one end of the battery cell 10 facing the box body 20 along the second direction Z, so as to be bonded to one side of the box body 20 along the second direction Z. In other possible designs, the adhesive layer may also be provided at other locations of the battery cell 10 .

[0170] This arrangement allows the battery unit 10 to be bonded to the housing 20 via the adhesive layer, which can reduce the cost of fixing the battery unit 10 to the housing 20. Furthermore, the process of fixing the battery unit 10 to the housing 20 is very simple and easy to implement.

[0171] In some embodiments, both the first fixing structure and the second fixing structure include adhesive layers.

[0172] It should be noted that the adhesive layer refers to a structure with bonding ability.

[0173] In some embodiments, the adhesive layer may be double-sided adhesive, structural adhesive, foam adhesive, etc.

[0174] When the adhesive layer is a foamed adhesive, the adhesive layer can be better filled between the battery cell 10 and the cover 30, thereby improving the restraint ability of the cover 30 on the battery cell 10. The adhesive layer can also be better filled between the battery cell 10 and the box 20, thereby improving the restraint ability of the box 20 on the battery cell 10.

[0175] In some embodiments, please refer to Figure 8 in conjunction with other figures. Figure 8 is a top view of the housing 20 and battery cell 10 of a battery 100 provided in other embodiments of the present application, and the top view is a schematic diagram along the second direction Z. A second wall 24 is provided on one side of the housing 20 along the third direction X. The second wall 24 is used to limit the position of the battery cell 10 along the third direction X. A fifth connector 25 is connected to the second wall 24, and the fifth connector 25 is used to connect to an external device. The third direction X intersects with the first direction Y, and the third direction X intersects with the second direction Z.

[0176] The third direction X may be parallel to the X-axis.

[0177] The meanings of the intersection of the third direction X and the first direction Y and the intersection of the third direction X and the second direction Z can refer to the above explanation of the intersection of the first direction Y and the second direction Z, and are not repeated here.

[0178] The second wall 24 refers to the side wall of the box body 20 and is a solid wall.

[0179] The second wall 24 is used to limit the battery cell 10 along the third direction X, meaning that the battery cell 10 is located on one side of the second wall 24 along the third direction X. The second wall 24 can abut against the battery cell 10 along the third direction X, thereby providing a restraining force to the battery cell 10 along the first direction X, thereby limiting the battery cell 10 along the third direction X. A filler 40, described below, may also be disposed between the battery cell 10 and the second wall 24, so that the second wall 24, through the filler 40, provides a restraining force to the battery cell 10, thereby limiting the battery cell 10 along the third direction X.

[0180] The fifth connecting member 25 is a component of the housing 20 used for connecting to an external device. The fifth connecting member 25 can be connected to the second wall 24 in one piece or in a separate piece.

[0181] One or more fifth connecting members 25 may be connected to the second wall 24 .

[0182] A second wall 24 for limiting the position of the battery cell 10 is provided on one side of the housing 20 along the third direction X. A fifth connector 25 for connecting to an external device is connected to the second wall 24. This allows the external device to constrain the position of the fifth connector 25 in the third direction X, thereby constraining the position of the second wall 24 connected to the fifth connector 25. This constrains the battery cell 10 along the third direction X, effectively preventing expansion of the battery cell 1 in the third direction X. In this way, expansion of the battery cell 1 can be prevented in multiple directions, thereby improving the product competitiveness of the battery 100 and reducing costs.

[0183] It should be supplemented here that one end of the second wall 24 along the first direction Y is connected to one of the first walls 21 , and the other end of the second wall 24 along the first direction Y is connected to the other first wall 21 .

[0184] Furthermore, when the second wall 24 is provided with the third connecting member 23 , the fifth connecting member 25 may be provided on the third connecting member 23 .

[0185] In some embodiments, a corresponding connector may be provided on one side of the cover 30 along the third direction X to connect with the fifth connector 25 and to connect to an external device.

[0186] In some embodiments, referring to FIG. 8 and in conjunction with other figures, a restraining member 50 is disposed within the housing 20 . The restraining member 50 is disposed opposite the second wall 24 along the third direction X. Along the third direction X, the battery cell 10 is positioned between the second wall 24 and the restraining member 50 and is restrained by the second wall 24 and the restraining member 50 .

[0187] The restraint 50 is a structure for restraining the battery unit 10 to resist expansion of the battery cell 1. The restraint 50 is spaced apart from and opposite to the second wall 24 along the third direction X.

[0188] In some possible designs, the restraining member 50 may abut against the battery cell 10 along the third direction X, so that the restraining member 50 can provide a restraining force to the battery cell 10 to limit the battery cell 10 along the third direction X. A filler member 40 described below may also be disposed between the battery cell 10 and the restraining member 50, so that the restraining member 50 provides a restraining force to the battery cell 10 through the filler member 40 to limit the battery cell 10 along the third direction X.

[0189] Such a configuration allows the external device and the restraint member 50 to jointly resist the expansion of the battery unit 10 in the third direction X.

[0190] In some embodiments, please refer to Figure 9 and other accompanying drawings. Figure 9 is a top view of the battery case 20 and the battery cell 10 of some other embodiments of the present application. The top view is a schematic diagram along the second direction Z. The case 20 is provided with a third wall 26, which is arranged opposite to the second wall 24 along the third direction X. The third wall 26 is connected to a sixth connector 27, which is used to connect to an external device. Along the third direction X, the battery cell 1 is located between the second wall 24 and the third wall 26, and is limited by the second wall 24 and the third wall 26.

[0191] The third wall 26 is a solid side wall of the box body 20. The second wall 24 and the third wall 26 are spaced apart and arranged opposite to each other along the third direction X. It can be understood that the side walls of the box body 20 on opposite sides along the third direction X are the second wall 24 and the third wall 26 respectively.

[0192] The sixth connecting member 27 is a component of the housing 20 used for connecting to an external device. The sixth connecting member 27 can be connected to the third wall 26 in one piece or in a separate piece.

[0193] One or more sixth connecting members 27 may be connected to the third wall 26 .

[0194] Along the third direction X, the battery cell 10 is located between the second wall 24 and the third wall 26 , which means that the second wall 24 , the battery cell 10 , and the third wall 26 are distributed in sequence along the third direction X.

[0195] In the third direction X, the battery cell 10 is restrained by the second wall 24 and the third wall 26 , meaning that the battery cell 10 is located between the second wall 24 and the third wall 26 and is restrained in the third direction X by the second wall 24 and the third wall 26 . In other words, the battery cell 10 is restrained between the second wall 24 and the third wall 26 along the third direction X. The second wall 24 may abut against the battery cell 10 along the third direction X to provide a restraining force to the battery cell 10. A filler 40 (described below) may also be disposed between the second wall 24 and the battery cell 10 so that the second wall 24 provides a restraining force to the battery cell 10 through the filler 40. The third wall 26 may abut against the battery cell 10 along the third direction X to provide a restraining force to the battery cell 10. A filler 40 (described below) may also be disposed between the third wall 26 and the battery cell 10 so that the third wall 26 provides a restraining force to the battery cell 10 through the filler 40. Consequently, the battery cell 10 is restrained between the second wall 24 and the third wall 26 along the third direction X.

[0196] Such an arrangement allows external equipment to constrain the relative positions of the fifth connector 25 and the sixth connector 27 in the third direction X, thereby constraining the relative positions of the second wall 24 and the third wall 26 in the third direction X, thereby effectively resisting the expansion of the battery cell 1 in the third direction X.

[0197] Based on this, the expansion of the battery cell 1 can be resisted in all directions with low cost and high product competitiveness.

[0198] It should be additionally explained that one end of the third wall 26 along the first direction Y is connected to one of the first walls 21 , and the other end of the third wall 26 along the first direction Y is connected to the other first wall 21 .

[0199] Furthermore, when the third wall 26 is provided with the third connecting member 23 , the sixth connecting member 27 may be provided on the third connecting member 23 .

[0200] In some embodiments, a corresponding connector may be provided on one side of the cover 30 along the third direction X relative to the fifth connector 25 to connect with the sixth connector 27 and to connect to an external device.

[0201] In some embodiments, referring to Figures 3 to 9 in conjunction with other figures, a filler 40 is disposed between at least one first wall 21 and the battery cell 10 along the first direction Y. The filler 40 abuts against the first wall 21 and the battery cell 10 .

[0202] Specifically, a filling piece 40 is provided between at least one first wall 21 and the battery cell 1 adjacent thereto, and the filling piece 40 abuts against the first wall 21 and the battery cell 1 adjacent thereto.

[0203] In some possible designs, a filler 40 is provided between one of the first walls 21 and the battery cell 10. In other possible designs, a filler 40 is provided between one of the first walls 21 and the battery cell 10, and a filler 40 is also provided between the other first wall 21 and the battery cell 10.

[0204] Furthermore, the filling member 40 abuts against the first wall 21 and the battery cell 10 , so that the first wall 21 can better transmit the restraining force to the battery cell 10 to restrain the expansion of the battery cell 1 in the first direction Y.

[0205] In some embodiments, the filling member 40 includes one or more of a foam material member, an elastic structure, and a plastic member.

[0206] Such a configuration allows the filler 40 to be well filled between the first wall 21 and the battery cell 10 , which helps to transfer the restraining force of the first wall 21 to the battery cell 10 , thereby effectively improving the effective resistance to the expansion of the battery cell 1 .

[0207] In some embodiments, the battery 100 further includes a thermal management component, which is disposed in the housing 20 and is used to exchange heat with the battery cell 10 .

[0208] It is understandable that during operation, external heating or cooling fluid can circulate within the thermal management component and exchange heat with the battery cell 10 to achieve heating or cooling of the battery cell 10 .

[0209] In some possible designs, the thermal management component is disposed on a side of the housing 20 that faces the battery cell 10 along the second direction Z. In other possible designs, the thermal management component is disposed on a side of the housing 20 that faces away from the battery cell 10 along the second direction Z. In other possible designs, the thermal management component may be located at other locations of the housing 20.

[0210] It should be noted that when the thermal management component is arranged on the side of the box 20 facing the battery cell 10 along the second direction Z, the second fixing structure can fix the battery cell 10 to the thermal management component to achieve indirect fixation of the battery cell 10 on the box 20.

[0211] With such a configuration, the battery 100 can be heated or cooled, thereby improving the product competitiveness of the battery 100 .

[0212] 1 , the electrical device provided in the embodiment of the present application includes a battery 100. The battery 100 in this embodiment is the same as the battery 100 in the previous embodiment. For details, please refer to the relevant description of the battery 100 in the previous embodiment, which will not be repeated here.

[0213] The electrical device provided in the embodiment of the present application, by adopting the battery 100 involved above, can resist the expansion of the battery cell 1 along the first direction Y through the electrical device itself. On the basis of being able to effectively resist the expansion force of the battery cell 1, the setting of structures such as the expansion beam is eliminated, which helps to reduce the cost of the battery 100 and improve product competitiveness.

[0214] As one embodiment of the present application, as shown in Figures 2 to 7 , a battery 100 includes a housing 20, a cover 30, and a battery unit 10. The battery unit 10 includes multiple groups of battery cells 1, each group of battery cells 1 including multiple battery cells 1, and the multiple battery cells 1 in each group are sequentially abutted along a first direction Y. The wall surface with the largest area among all the wall surfaces of the battery cell 1 is perpendicular to the first direction Y.

[0215] Both the box body 20 and the cover body 30 are configured as hollow structures with an opening at one end along the second direction Z. The open side of the box body 20 along the second direction Z covers the open side of the cover body 30 along the second direction Z, and the battery unit 10 is arranged in the space enclosed by the box body 20 and the cover body 30.

[0216] The two opposing side walls of the housing 20 along the first direction Y are first walls 21, to which the first connectors 22 are connected. The two opposing side walls of the cover 30 along the first direction Y are fourth walls 33, to which the second connectors 31 are connected. The first connectors 22 and the second connectors 31 are connected and are used to connect external devices. There is a one-to-one correspondence between the two first walls 21 and the two fourth walls 33.

[0217] A portion of each battery cell 1 along the second direction Z is accommodated in the box 20 and located between the two first walls 21 . Another portion of each battery cell 1 along the second direction Z extends beyond the second wall 24 and is accommodated in the cover 30 and located between the two fourth walls 33 .

[0218] A filler 40 is disposed between each first wall 21 and the battery cell 10 , with the filler 40 abutting against the first wall 21 and the battery cell 10 on opposite sides along the first direction Y. Furthermore, each filler 40 also abuts against the fourth wall 33 and the battery cell 10 on opposite sides along the first direction Y.

[0219] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A battery (100), wherein, Comprising: A battery unit (10), including at least one battery cell (1); A box body (20) provided with two first walls (21) opposite to each other along a first direction (Y), and two first connectors (22) for connecting to external devices are connected to both of the first walls (21); in the first direction (Y), the battery unit (10) is disposed between the two first walls (21) and is limited by the first walls (21).

2. The battery (100) according to claim 1, wherein, The number of the battery cells (1) is multiple, and the wall surface with the largest area among all the wall surfaces of at least some of the battery cells (1) is perpendicular to the first direction (Y).

3. The battery (100) according to claim 1 or 2, wherein, The projection of the first connector (22) projected onto the first wall (21) along the first direction (Y) and the projection of at least some of the battery cells (1) projected onto the first wall (21) along the first direction (Y) are at least partially overlapped.

4. The battery (100) according to any one of claims 1-3, wherein, The battery unit (10) includes at least one group of multiple battery cells (1) arranged along the first direction (Y), all the battery cells (1) in each group are sequentially abutted along the first direction (Y), and the wall surface with the largest area among all the wall surfaces of the battery cell (1) is perpendicular to the first direction (Y).

5. The battery (100) according to claim 4, wherein, The projection of the battery cells (1) in each group projected onto the first wall (21) along the first direction (Y) and the projection of at least one first connector (22) projected onto the first wall (21) along the first direction (Y) are at least partially overlapped.

6. The battery (100) according to any one of claims 1-5, wherein, The battery (100) further includes a cover body (30) connected to one end of the box body (20) along a second direction (Z), the second direction (Z) intersects with the first direction (Y), and the battery unit (10) is disposed in the space formed by enclosing the box body (20) and the cover body (30).

7. The battery (100) according to claim 6, wherein, Second connectors (31) are provided on opposite sides of the cover body (30) along the first direction (Y), and the second connectors (31) are used to connect to the first connectors (21) and external devices.

8. The battery (100) according to claim 6 or 7, wherein, The battery unit (10) protrudes beyond the box body (20) along the second direction (Z) towards the cover body (30).

9. The battery (100) according to claim 7, wherein, A third connector (23) is provided at the edge of one end of the box body (20) along the second direction (Z) towards the cover body (30), and a fourth connector (32) is provided at the edge of one end of the cover body (30) along the second direction (Z) towards the box body (20), and the third connector (23) and the fourth connector (32) are connected.

10. The battery (100) according to claim 9, wherein, The first connector (22) is provided on the third connector (23); and / or, the second connector (31) is provided on the fourth connector (32).

11. The battery (100) according to any one of claims 6-10, wherein, A first fixing structure is provided between the cover body (30) and the battery unit (10), and the first fixing structure fixes the battery unit (10) to the cover body (30); and / or, a second fixing structure is provided between the box body (20) and the battery unit (10), and the second fixing structure fixes the battery unit (10) to the box body (20).

12. The battery (100) according to claim 11, wherein, The first fixing structure and / or the second fixing structure includes an adhesive layer.

13. The battery (100) according to any one of claims 6 - 12, wherein, One side of the box body (20) along the third direction (X) is provided with a second wall (24), and the second wall (24) is used to limit the battery unit (10) along the third direction (X). The second wall (24) is connected with a fifth connecting piece (25) for connecting with an external device; the third direction (X) intersects with the first direction (Y) and the second direction (Z) pairwise.

14. The battery (100) according to claim 13, wherein, A restraint (50) opposite to the second wall (24) along the third direction (X) is arranged in the box body (20). Along the third direction (X), the battery unit (10) is located between the second wall (24) and the restraint (50) and is limited by the second wall (24) and the restraint (50). Alternatively, the box body (20) is provided with a third wall (26) opposite to the second wall (24) along the third direction (X). The third wall (26) is connected with a sixth connecting piece (27) for connecting with an external device. Along the third direction (X), the battery unit (10) is located between the second wall (24) and the third wall (26) and is limited by the second wall (24) and the third wall (26).

15. The battery (100) according to any one of claims 1-14, wherein, Along the first direction (Y), a filler (40) is arranged between at least one of the first walls (21) and the battery unit (10), and the filler (40) abuts against the first wall (21) and the battery unit (10).

16. The battery (100) according to claim 15, wherein, The filler (40) includes one or more of a foamed material piece, an elastic structure, and a plastic part.

17. The battery (100) according to any one of claims 1-16, wherein, The battery (100) further includes a thermal management component arranged on the box body (20), and the thermal management component is used for heat exchange with the battery unit (10).

18. An electrical device, wherein, Including the battery (100) according to any one of claims 1-17.

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