Battery and electric device

Abstract

A battery (100) and an electric device. The battery (100) comprises a case (10), a plurality of battery assemblies (20), a plurality of first busbars (40) and pressing strips (30). The case (10) is provided with an accommodating space. The plurality of battery assemblies (20) are arranged in the accommodating space and are arranged in a first direction (a), wherein the first direction (a) is the length direction or the width direction of the case (10). Each battery assembly (20) comprises a plurality of battery cells (21). The plurality of battery cells (21) are arranged in a second direction (b), wherein the second direction (b) intersects with the first direction (a). On one side of the corresponding battery assembly (20) in a third direction (c), two adjacent battery cells (21) are electrically connected by means of one first busbar (40), wherein the third direction (c) separately intersects with the first direction (a) and the second direction (b). The pressing strips (30) are arranged in the accommodating space and are arranged on the same side of the battery assemblies (20) as the plurality of first busbars (40). At least some of the first busbars (40) are connected to the pressing strips (30). The pressing strips (30) are insulated from the first busbars (40). The pressing strips (30) are connected to the sides of the first busbars (40) facing away from the battery assemblies (20), thereby improving the overall structural strength of the battery (100).

Description

Batteries and electrical equipment

[0001] Cross-reference of related applications

[0002] This application claims priority and the rights of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] A Chinese patent application, application number 202410708604.5, entitled "Battery and Electrical Equipment", was filed with the China National Intellectual Property Administration on May 31, 2024. Technical Field

[0004] This application relates to the field of battery technology, and more particularly to a battery and an electrical device. Background Technology

[0005] With the development of new energy sources, more and more fields are adopting new energy sources as power sources. Due to their advantages such as high energy density, rechargeability, safety, and environmental friendliness, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems, and other fields.

[0006] A battery consists of a housing and multiple individual battery cells housed within the housing. To increase the energy density of a battery, the number of individual battery cells is usually increased by simplifying the housing structure; however, this reduces the structural strength of the battery.

[0007] Summary of the Invention

[0008] In view of the above problems, this application provides a battery and an electrical device that solves the problem of low structural strength of the battery.

[0009] A first aspect of this application discloses a battery comprising:

[0010] The container has storage space;

[0011] Multiple battery modules are arranged in a housing space along a first direction, which is the length or width direction of the housing. Each battery module includes multiple battery cells, which are arranged in a second direction, intersecting the first direction.

[0012] Multiple first busbars are provided on the side of the battery assembly located in the third direction, and two adjacent battery cells are electrically connected through a first busbar; the third direction is respectively arranged to intersect with the first direction and the second direction;

[0013] A pressure strip is disposed within the receiving space and on the same side of the battery assembly as a plurality of first busbars. At least a portion of the first busbars are connected to the pressure strip, and the pressure strip and the first busbars are insulated from each other.

[0014] Specifically, a pressure strip is set in the battery and connected to the side of the first busbar away from the battery assembly, so that the pressure strip and the battery assembly can form an integral whole. The pressure strip can improve the structural strength of the battery assembly, thereby enhancing the overall structural strength of the battery.

[0015] In some embodiments of this application, the connection between the pressure strip and the first busbar includes bonding, snap-fitting, or connection via a first connector. By setting the connection method between the pressure strip and the first busbar, the connection method can be selected according to assembly requirements, thereby improving assembly flexibility and effectively enhancing assembly efficiency.

[0016] In some embodiments of this application, the side of the pressure strip opposite to the first busbar is connected to the housing. By configuring the pressure strip to be connected to the housing, the battery assembly can be connected to the housing and form a single unit, further improving the overall structural strength of the battery.

[0017] In some embodiments of this application, the connection between the pressure strip and the housing includes bonding, snap-fitting, or connection via a second connector. By setting the connection method between the pressure strip and the housing, the connection method can be selected according to assembly requirements, thereby improving assembly flexibility and effectively enhancing assembly efficiency.

[0018] In some embodiments of this application, the housing includes a first part and a second part, which together form an accommodating space. One of the first and second parts faces the pressure strip and is connected to the side of the pressure strip opposite to the battery assembly. By configuring the housing as a combination of the first and second parts, it is easier to assemble the battery assembly into the housing, thereby improving assembly convenience.

[0019] In some embodiments of this application, the pressure strip includes an extension portion that extends in a first direction and is flush with the side of the pressure strip opposite to the battery assembly. The extension portion is connected to one of a first portion and a second portion. By providing the extension portion and connecting it to the first or second portion of the housing, the connection area between the pressure strip and the housing is increased, thereby further enhancing the connection strength between the pressure strip and the housing and further improving the overall structural strength of the battery.

[0020] In some embodiments of this application, the number of extension portions is two, and the two extension portions are disposed on opposite sides of the pressure strip in the first direction. Providing two extension portions further increases the connection area between the pressure strip and the casing, thereby further enhancing the connection strength between the pressure strip and the casing, and further improving the overall structural strength of the battery.

[0021] In some embodiments of this application, the first part is a cover plate structure, and the second part is a frame structure. The frame structure has a receiving groove. The first part and the second part are connected, and the first part and the receiving groove together form a receiving space. A pressure strip is connected to the first part. During battery assembly, multiple battery modules are first placed in the receiving groove, then the first busbar is connected to the individual cells in each battery module, then the pressure strip is connected to the first busbar, and finally the first part and the second part are connected. After the first part and the second part are installed in place, the pressure strip is connected to the first part. By setting up the first part and the second part, the ease of assembly during battery production is effectively improved, thereby shortening the assembly time and improving the assembly efficiency.

[0022] In some embodiments of this application, along the second direction, the frame structure includes two opposing support beams, at least one of which is connected to a pressure strip. By connecting the pressure strip to the support beams, the number of connection points between the battery assembly and the housing is further increased, thereby further improving the connection strength between the battery assembly and the housing and further enhancing the structural strength of the battery.

[0023] In some embodiments of this application, the connection between the pressure strip and the support beam includes bonding, welding, snap-fitting, or connection via connectors. By setting the connection method between the pressure strip and the support beam, the connection method can be selected according to the assembly requirements, thereby improving the flexibility of assembly and effectively enhancing assembly efficiency.

[0024] In some embodiments of this application, the pressure strip is a strip-shaped member extending along a second direction. Along the first direction, multiple first busbars located on the same side of the battery assembly are respectively connected to the pressure strip. The connection of the strip-shaped pressure strip to the first busbars on the same battery assembly enhances the structural strength of the battery assembly with the pressure strip, thereby effectively improving the overall structural strength of the battery.

[0025] In some embodiments of this application, the pressure strip has a first cross-section along a first direction, and the outer contour of the first cross-section is rectangular or trapezoidal. By setting the shape of the first cross-section, sufficient contact area is provided between the pressure strip and the first busbar, and between the pressure strip and the housing, thereby further improving the connection strength between the pressure strip and the first busbar, and between the pressure strip and the housing, and thus further enhancing the overall structural strength of the battery.

[0026] In some embodiments of this application, the pressure strip is a solid structure or a tubular structure. By setting the pressure strip, the structure of the pressure strip can be selected according to assembly requirements, thereby improving the flexibility of pressure strip selection and effectively meeting the battery assembly requirements.

[0027] In some embodiments of this application, multiple pressure strips are provided, all of which are arranged parallel to each other in a first direction. By providing multiple pressure strips, the structural strength of the battery assembly can be further improved, thereby effectively enhancing the overall structural strength of the battery.

[0028] In some embodiments of this application, the size of the pressure strip is between 0.5 mm and 30 mm along the third direction. By setting the size of the pressure strip in the third direction, the pressure strip has sufficient strength while effectively reducing its occupation of the internal space of the casing, thereby improving the energy density of the battery.

[0029] In some embodiments of this application, the pressure strip is a non-metallic component. The non-metallic pressure strip is connected to the first busbar, which, while improving the overall structural strength of the battery assembly, reduces the possibility of short circuits due to conductivity between the pressure strip and the first busbar, thus improving the battery's safety performance.

[0030] In some embodiments of this application, the pressure strip is a metal component, and an insulating structure is provided between the pressure strip and the first busbar. By making the pressure strip a metal component and providing an insulating structure between the pressure strip and the first busbar, the metal component pressure strip has good structural strength, thereby further improving the overall structural strength of the battery assembly and enhancing the overall structural strength of the battery.

[0031] In some embodiments of this application, the insulating structure includes an insulating film or insulating adhesive. The insulating structure has a simple structure, which can effectively reduce manufacturing costs.

[0032] A second aspect of this application provides an electrical device comprising a battery as described above.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0034] Figure 1 schematically shows a structural diagram of a vehicle according to one embodiment of this application;

[0035] Figure 2 schematically shows a structural diagram of a battery according to one embodiment of this application;

[0036] Figure 3 is a schematic diagram of the exploded structure of the battery shown in Figure 2;

[0037] Figure 4 is a partial structural schematic diagram of the battery shown in Figure 2 in some embodiments;

[0038] Figure 5 is an enlarged structural diagram of part A in the structure shown in Figure 4;

[0039] Figure 6 is an enlarged structural diagram of part B in the structure shown in Figure 5;

[0040] Figure 7 is a partial structural schematic diagram of the battery shown in Figure 2 in some embodiments;

[0041] Figure 8 is an enlarged schematic diagram of section C in the structure shown in Figure 7.

[0042] The attached figures are labeled as follows:

[0043] 1000, vehicles;

[0044] 100. Battery; 200. Controller; 300. Motor;

[0045] 10. Box body;

[0046] 11. Part One;

[0047] 12. Part Two;

[0048] 121. Receiving slot; 122. Support beam;

[0049] 20. Battery components;

[0050] 21. Battery cell;

[0051] 30. Pressing strip;

[0052] 31. Extension section;

[0053] 40. First busbar;

[0054] 50. Second busbar;

[0055] a) First direction; b) Second direction; c) Third direction; m) First dimension. Detailed Implementation

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0061] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0062] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are 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, they should not be construed as limitations on the embodiments of this application.

[0063] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0064] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively 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 battery applications, market demand is also constantly increasing.

[0065] In related technologies, a battery includes a housing and multiple battery cells housed within the housing. To increase the energy density of the battery, the number of battery cells is usually increased by simplifying the housing structure; however, this reduces the structural strength of the battery.

[0066] In this application, the battery includes a housing, multiple battery modules, multiple first busbars, and a pressure strip. The housing has a receiving space, and the multiple battery modules are disposed within the receiving space and arranged along a first direction, which is either the length or width direction of the housing. Each battery module includes multiple battery cells, which are arranged in a second direction intersecting the first direction. On the side of the battery module located in a third direction, adjacent battery cells are electrically connected through a first busbar. The third direction intersects both the first and second directions. The pressure strip is disposed within the receiving space and on the same side of the multiple first busbars. At least a portion of the first busbars are connected to the pressure strip, and the pressure strip and the first busbars are insulated from each other. By providing a pressure strip within the battery and connecting it to the side of the first busbars facing away from the battery modules, the pressure strip and the battery modules can form a unified whole. The pressure strip improves the structural strength of the battery modules, thereby enhancing the overall structural strength of the battery.

[0067] The batteries described in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using battery cells and batteries as described in this application.

[0068] In this application embodiment, the electrical devices that use batteries as a power source can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, 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.

[0069] It should be understood that the technical solutions described in the embodiments of this application are not limited to the batteries and electrical devices described above, but can also be applied to all batteries including housings and electrical devices using batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0070] Please refer to Figure 1, which is a structural 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. A battery 100 is disposed 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. 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, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0071] 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.

[0072] Figure 2 shows a schematic diagram of the structure of a battery 100 according to an embodiment of this application. In order to meet different power needs, the battery 100 may include multiple battery modules 20, which may be connected in series, parallel or mixed (mixed connection refers to a combination of series and parallel connection) and arranged in the housing 10 to form the battery 100.

[0073] The housing 10 provides a space for housing the individual battery cells 21, and can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, together defining a space for housing the battery assembly 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 together define the space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc. In addition, the material of the housing 10 can be alloy materials such as aluminum alloy or iron alloy, or polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin. This application embodiment is not limited in this respect.

[0074] As shown in Figure 3, in this application, the battery assembly 20 includes multiple battery cells 21 and multiple busbars. A battery cell 21 is the smallest unit constituting the battery assembly 20. Multiple battery cells 21 can be connected in series, parallel, or a combination thereof (a combination means that multiple battery cells 21 are connected in both series and parallel) to form the battery assembly 20. A busbar is a component that can connect multiple battery cells 21 in series or parallel to achieve electrical connection between them. A busbar can also be called a busbar, a strip, or a busbar bar; it is generally a thin metal sheet that can be welded to the electrode terminals of the battery cells 21 to connect multiple battery cells 21 in series or parallel. Multiple battery cells 21 can be directly connected in series, parallel, or a combination thereof through the busbar assembly. Each battery cell 21 can be a secondary battery 100 or a primary battery 100; it can also be a lithium-sulfur battery 100, a sodium-ion battery 100, or a magnesium-ion battery 100, but is not limited to these. A battery cell 21 can be cylindrical, flat, cuboid, or other shapes.

[0075] Each battery cell 21 may contain one or more electrode assemblies, which are the components in the battery cell 21 where electrochemical reactions occur. The adapter is the component in the battery cell 21 that carries current. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each have a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging processes of the battery 100, the positive and negative active materials react with the electrolyte, and the adapter connects the tabs and electrode terminals to form a current loop.

[0076] In some embodiments, the battery cell 21 may be provided with functional components such as electrode terminals. The electrode terminals may be used to electrically connect electrode assemblies and busbars for outputting or inputting electrical energy into the battery cell 21. In some embodiments, the battery cell 21 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold.

[0077] In some embodiments of this application, as shown in Figures 2 to 8, a battery 100 is proposed. The battery 100 includes a housing 10, battery components 20, a plurality of first busbars 40, and a pressure strip 30. The housing 10 has a receiving space. The plurality of battery components 20 are disposed in the receiving space and arranged along a first direction a. The first direction a is the length or width direction of the housing 10. Each battery component 20 includes a plurality of battery cells 21. The plurality of battery cells 21 are arranged in a second direction b. The second direction b intersects with the first direction a. On the side of the battery component 20 located in a third direction c, two adjacent battery cells 21 are electrically connected through a first busbar 40. The third direction c intersects with the first direction a and the second direction b respectively. The pressure strip 30 is disposed in the receiving space and is disposed on the same side of the plurality of first busbars 40 as the battery components 20. At least a portion of the first busbars 40 are connected to the pressure strip 30, and the pressure strip 30 and the first busbars 40 are insulated from each other.

[0078] Specifically, all battery modules 20 are arranged in the first direction a, and all battery cells 21 in each battery module 20 are arranged in the second direction b. Adjacent battery cells 21 are electrically connected through a first busbar 40. A pressure strip 30 is disposed inside the housing 10 and in the third direction c. The pressure strip 30 is located between the first busbar 40 and the housing 10, connecting the pressure strip 30 to the side of the first busbar 40 away from the battery module 20. This allows the pressure strip 30 to form an integral unit with the battery module 20. The pressure strip 30 improves the structural strength of the battery module 20, thereby enhancing the overall structural strength of the battery 100.

[0079] In addition, a pressure strip 30 is provided inside the housing 10 of the battery 100. The pressure strip 30 is used to connect the battery cells 21 in the battery assembly 20 into a whole, thereby improving the overall structural strength of the battery 100. This simplifies the internal structure of the housing 10 (e.g., reducing the expansion beams and other structures inside the housing 10), allowing more battery cells 21 to be placed in the housing space of the housing 10, thereby effectively improving the energy density of the battery 100.

[0080] It should be understood that in this application, the pressure strip 30 is a component with a certain structural strength, and the pressure strip 30 can be a straight structure, a curved structure, or a multi-branch structure, etc. When the pressure strip 30 is connected to the first busbar 40, the pressure strip 30 can be connected to the first busbar 40 on only one battery assembly 20, or the pressure strip 30 can be connected to the first busbar 40 on different battery assemblies 20.

[0081] In addition, the first busbar 40 electrically connects two adjacent battery cells 21. The first busbar 40 is a live component. The pressure strip 30 is connected to different first busbars 40. By insulating the first busbar 40 from the pressure strip 30, the occurrence of short circuits in the first busbar 40 can be reduced, thereby effectively improving the safety of the battery 100.

[0082] It should be noted that the first busbar component is electrically connected to the electrode terminal of a battery cell 21 by welding, snap-fitting or fastening, and the other end of the first busbar component is electrically connected to the electrode terminal of another battery cell 21 by welding, snap-fitting or fastening.

[0083] In this application, as shown in Figures 3 to 5, and Figures 7 and 8, the battery 100 further includes a second busbar 50. Along the first direction a, two adjacent battery modules 20 are electrically connected via the second busbar 50. By providing the second busbar 50, electrical connections (series, parallel, or mixed) between the battery modules 20 can be achieved. The second busbar is electrically connected to the electrode terminals of the battery cells 21 in one battery module 20 by welding, snap-fitting, or fastening. The other end of the second busbar is electrically connected to the electrode terminals of the battery cells 21 in another electrode module by welding, snap-fitting, or fastening.

[0084] In some embodiments of this application, the connection between the pressure strip 30 and the first busbar 40 can take various forms. By setting the connection between the pressure strip 30 and the first busbar 40, the connection method can be selected according to the assembly requirements, thereby improving the flexibility of assembly and effectively improving the efficiency of assembly.

[0085] For example, the pressure strip 30 and the first busbar 40 are connected by adhesive. During assembly, adhesive (a non-conductive adhesive, such as epoxy resin or polyurethane adhesive) is applied to at least one of the pressure strip 30 and the first busbar 40, and then the pressure strip 30 is pressed against the first busbar 40 to achieve a connection and fixation between the pressure strip 30 and the first busbar 40. Adhesive bonding is a simple structural method, easy to assemble, and can effectively shorten assembly time, thereby significantly accelerating the production cycle.

[0086] For example, the pressure strip 30 and the first busbar 40 are connected by a snap-fit ​​mechanism. The pressure strip 30 has a first snap-fit ​​structure (e.g., a buckle structure), and the first busbar 40 has a second snap-fit ​​structure (e.g., a snap-hole structure). During assembly, the first and second snap-fit ​​structures are positioned opposite each other, and by engaging them, the connection between the pressure strip 30 and the first busbar 40 is secured. This snap-fit ​​method provides high connection strength, effectively reducing the possibility of loosening or detachment between the pressure strip 30 and the first busbar 40, and improving the stability of the connection position.

[0087] For example, the pressure strip 30 and the first busbar 40 are connected by a first connector (such as a plastic screw). During assembly, the pressure strip 30 abuts against the first busbar 40, and the first connector mates with both the first busbar 40 and the pressure strip 30, thereby fixing the pressure strip 30 to the first busbar 40. This connection via the first connector allows for easy assembly and disassembly of the pressure strip 30 and the first connector, thus improving the convenience of battery 100 maintenance.

[0088] In some embodiments of this application, as shown in Figures 4 to 8, the side of the pressure strip 30 facing away from the first busbar 40 is connected to the housing 10.

[0089] Specifically, along the third direction c, the first busbar 40, the pressure strip 30, and the housing 10 are arranged sequentially, wherein the pressure strip 30 is connected to the first busbar 40 and the housing 10 on opposite sides of the third direction c, respectively. By setting the pressure strip 30 to be connected to the housing 10, the battery assembly 20 can be connected to the housing 10 and form a whole, further improving the overall structural strength of the battery 100.

[0090] It should be noted that in this application, the pressure strip 30 is connected and fixed to the inner surface of the box 10. The pressure strip 30 can be partially connected and fixed to the inner surface of the box 10, or the pressure strip 30 can be completely connected and fixed to the inner surface of the box 10.

[0091] In some embodiments of this application, the connection between the pressure strip 30 and the housing 10 can take various forms. By setting the connection between the pressure strip 30 and the housing 10, the connection method can be selected according to the assembly requirements, thereby improving the flexibility of assembly and effectively improving the efficiency of assembly.

[0092] For example, the pressure strip 30 is connected to the housing 10 by adhesive bonding. During assembly, adhesive (a non-conductive adhesive, such as epoxy resin or polyurethane adhesive) is applied to at least one of the pressure strip 30 and the housing 10, and then the pressure strip 30 is brought into contact with the housing 10 to achieve a fixed connection between them. This adhesive bonding method is simple in structure, easy to assemble, and can effectively shorten assembly time, thereby accelerating the production cycle.

[0093] For example, the pressure strip 30 is connected to the housing 10 by a snap-fit ​​connection. A first snap-fit ​​structure (e.g., a buckle structure) is provided on the housing 10, and a second snap-fit ​​structure (e.g., a snap-hole structure) is provided on the pressure strip 30. During assembly, the first and second snap-fit ​​structures are positioned opposite each other, and the connection between the pressure strip 30 and the housing 10 is secured by the snap-fit ​​engagement. This snap-fit ​​connection provides high strength, effectively reducing the possibility of loosening or detachment between the pressure strip 30 and the housing 10, and improving the stability of the connection position.

[0094] For example, the pressure strip 30 is connected to the housing 10 via a second connector (such as a plastic screw). During assembly, the pressure strip 30 is brought into contact with the housing 10, and the second connector is engaged with both the pressure strip 30 and the housing 10, thereby securing the pressure strip 30 to the housing 10. This connection via the second connector allows for easy assembly and disassembly of the pressure strip 30 and the housing 10, thus improving the convenience of battery 100 maintenance.

[0095] In some embodiments of this application, as shown in Figures 2 and 3, the housing 10 includes a first part 11 and a second part 12, which together form an accommodating space. One of the first part 11 and the second part 12 is disposed facing the pressure strip 30 and connected to the side of the pressure strip 30 away from the battery assembly 20.

[0096] Specifically, taking the pressure strip 30 connected to the first busbar 40 and the housing 10 by adhesive bonding as an example, during the assembly process, the battery assembly 20 is first placed on one of the first part 11 and the second part 12, and the first busbar 40 is connected to the battery assembly 20. Then, the pressure strip 30 is bonded to the first busbar 40 (non-conductive adhesive can be applied to the pressure strip 30 and / or the first busbar 40). Then, the first part 11 and the second part 12 are connected and fixed. After the first part 11 and the second part 12 are installed in place, the pressure strip 30 is bonded and fixed to the other of the first part 11 and the second part 12 (non-conductive adhesive can be applied to the pressure strip 30 and / or the housing 10).

[0097] The housing 10 is configured as a combination of the first part 11 and the second part 12, which facilitates the assembly of the battery assembly 20 into the housing 10 and improves the ease of assembly.

[0098] It should be noted that the connection methods between the first part 11 and the second part 12 include, but are not limited to, bonding, welding, snap-fitting, or connection by fasteners.

[0099] In addition, a sealing structure (such as a sealing ring or sealant) is provided at the joint position of the first part 11 and the second part 12 to improve the sealing performance of the joint position of the first part 11 and the second part 12.

[0100] In some embodiments of this application, as shown in Figures 5 and 6, the pressure strip 30 includes an extension portion 31, which extends in a first direction a. The extension portion 31 is flush with the side of the pressure strip 30 away from the battery assembly 20, and is connected to one of the first portion 11 and the second portion 12.

[0101] Specifically, the extension portion 31 is disposed on the pressure strip 30. In the first direction a, the extension portion 31 extends and protrudes relative to the pressure strip 30, and in the third direction c, the extension portion 31 is flush with the pressure strip 30. When the pressure strip 30 is connected to the housing 10, the pressure strip 30 and the extension portion 31 are respectively connected to the inner surface of the housing 10.

[0102] The extension portion 31 is provided and connected to the first part 11 or the second part 12 of the housing 10, thereby increasing the connection area between the pressure strip 30 and the housing 10, further improving the connection strength between the pressure strip 30 and the housing 10, and further improving the overall structural strength of the battery 100.

[0103] It should be noted that in this application, the extension portion 31 can be a convex structure or a flanged structure, etc. In addition, the extension portion 31 and the pressing strip 30 are integrally formed, which can improve processing efficiency and increase the production cycle.

[0104] In some embodiments of this application, as shown in FIG6, there are two extension portions 31, and the two extension portions 31 are disposed on opposite sides of the pressure strip 30 in the first direction a.

[0105] Specifically, two extension portions 31 are provided, which further increases the connection area between the pressure strip 30 and the housing 10, thereby further improving the connection strength between the pressure strip 30 and the housing 10 and further enhancing the overall structural strength of the battery 100.

[0106] In some embodiments of this application, as shown in FIG3, the first part 11 is a cover plate structure, the second part 12 is a frame structure, the frame structure is provided with a receiving groove 121, the first part 11 is connected to the second part 12, the first part 11 and the receiving groove 121 together form a receiving space, and the pressure strip 30 is connected to the first part 11.

[0107] Specifically, the second part 12 is a frame structure formed by splicing multiple frames. The receiving slot 121 is formed by enclosing multiple frames, with an opening at the top and closed structures at the rest. When the first part 11 is connected to the second part 12, the first part 11 can close the top opening of the receiving slot 121, thereby creating a receiving space.

[0108] Taking the connection of the pressure strip 30 to the first busbar 40 and the housing 10 via adhesive bonding as an example, during the assembly process of the battery 100, multiple battery modules 20 are first placed in the receiving slot 121, then the first busbar 40 is connected to the battery cell 21 in each battery module 20, and then the pressure strip 30 is bonded to the first busbar 40. Finally, the first part 11 and the second part 12 are connected. After the first part 11 and the second part 12 are installed in place, the pressure strip 30 is bonded to the first part 11. By setting the first part 11 and the second part 12, the ease of assembly during the battery 100 production process is effectively improved, thereby shortening the assembly time and improving the assembly efficiency.

[0109] In some embodiments of this application, as shown in Figures 3, 4 and 7, along the second direction b, the frame structure includes two opposing support beams 122, at least one of which is connected to the pressure strip 30.

[0110] Specifically, the housing 10 includes a first part 11 and a second part 12. The first part 11 is a cover structure, and the second part 12 is a frame structure with a receiving groove 121. Two support beams 122 are used to enclose the receiving groove 121 and are arranged opposite to each other. The battery assembly 20 is arranged in the receiving groove 121. The first busbar 40 electrically connects two adjacent battery cells 21 in the same battery assembly 20. The pressure strip 30 is connected to the first busbar 40 and the housing 10 respectively.

[0111] By connecting the pressure strip 30 to the support beam 122, the connection points between the battery assembly 20 and the housing 10 are further increased, and the connection strength between the battery assembly 20 and the housing 10 is further improved, thereby further enhancing the structural strength of the battery 100.

[0112] In some embodiments of this application, the connection between the pressure strip 30 and the support beam 122 can take various forms. By setting the connection between the pressure strip 30 and the support beam 122, the connection method can be selected according to the assembly requirements, thereby improving the flexibility of assembly and effectively improving the efficiency of assembly.

[0113] For example, the pressure strip 30 and the support beam 122 are connected by adhesive. During assembly, adhesive (a non-conductive adhesive, such as epoxy resin or polyurethane adhesive) is applied to at least one of the pressure strip 30 and the support beam 122, and then the pressure strip 30 and the support beam 122 are brought together to achieve a fixed connection between them. This adhesive method is simple in structure, easy to assemble, and can effectively shorten assembly time, thus accelerating the production cycle.

[0114] For example, the pressure strip 30 is connected to the support beam 122 by a snap-fit ​​connection. A first snap-fit ​​structure (e.g., a buckle structure) is provided on the support beam 122, and a second snap-fit ​​structure (e.g., a locking hole structure) is provided on the pressure strip 30. During assembly, the first and second snap-fit ​​structures are positioned opposite each other, and the connection between the pressure strip 30 and the support beam 122 is achieved by engaging the first and second snap-fit ​​structures. This snap-fit ​​connection method provides high connection strength, effectively reducing the possibility of loosening or detachment between the pressure strip 30 and the housing 10, and improving the stability of the connection position between the pressure strip 30 and the support beam 122.

[0115] For example, the pressure strip 30 and the support beam 122 are connected by connectors (such as screws). During assembly, the pressure strip 30 abuts against the support beam 122, and the connectors are fitted to both the pressure strip 30 and the support beam 122, thereby fixing the pressure strip 30 and the support beam 122 together. This connection method via connectors allows for easy assembly and disassembly of the pressure strip 30 and the support beam 122, thus improving the convenience of battery 100 maintenance.

[0116] For example, the pressure strip 30 and the support beam 122 are connected by welding. During assembly, the pressure strip 30 and the support beam 122 are brought together, and the pressure strip 30 is welded to the support component using welding equipment, thereby achieving the connection and fixation of the pressure strip 30 and the support beam 122. This connection method via connectors allows for the assembly and disassembly of the pressure strip 30 and the support beam 122, thus improving the convenience of battery 100 maintenance.

[0117] In some embodiments of this application, as shown in FIG5 or FIG8, the pressure strip 30 is a strip-shaped piece that extends along the second direction b, and along the first direction a, a plurality of first busbars 40 located on the same side of the battery assembly 20 are respectively connected to the pressure strip 30.

[0118] Specifically, the pressure strip 30 of the strip is connected to the first busbar 40 on the same battery assembly 20, thereby enabling the battery assembly 20 with the pressure strip 30 connected to improve its structural strength, and thus effectively improving the overall structural strength of the battery 100.

[0119] It should be understood that the dimension of the strip 30 in the second direction b can be greater than, less than or equal to the dimension of the battery assembly 20 in the second direction b.

[0120] In addition, all first busbars 40 on the same battery assembly 20 located on the same side in the first direction a can be partially or completely connected to the pressure strip 30.

[0121] Taking a prismatic battery 100 as an example, the battery cell 21 includes multiple surfaces, among which there are two first surfaces arranged in opposite directions. Among the multiple surfaces, the first surface has the largest area. The two first surfaces are spaced apart in the second direction b. The pressure strip 30 is connected to the first busbar 40. The pressure strip 30 is perpendicular to the two first surfaces. By setting the pressure strip 30 perpendicular to the two first surfaces, the pressure strip 30 can form a whole for multiple battery cells 21 in the same battery assembly 20, which further improves the structural strength of the battery assembly 20, thereby improving the overall structural strength of the battery 100.

[0122] In some embodiments of this application, along the first direction a, the pressure strip 30 has a first cross section. The outer contour of the first cross section can be of various shapes. By setting the shape of the first cross section, sufficient contact area is provided between the pressure strip 30 and the first busbar 40 and between the pressure strip 30 and the housing 10, thereby further improving the connection strength between the pressure strip 30 and the first busbar 40 and between the pressure strip 30 and the housing 10, and further enhancing the overall structural strength of the battery 100.

[0123] For example, the first cross-section is rectangular, comprising two first sides and two second sides. The two first sides are spaced apart in a first direction 'a', and the two second sides are spaced apart in a third direction 'c'. The length of the second sides is greater than the length of the first sides. One of the two second sides is connected to the first busbar 40, and the other is connected to the housing 10. By designing the first cross-section, the connection area between the pressure strip 30 and the first busbar 40, as well as between the pressure strip 30 and the housing 10, is increased, thereby enhancing the strength of the connection points.

[0124] For example, the first cross-section is trapezoidal, comprising an upper base and a lower base, which are spaced apart in a third direction c, and the length of the second side is greater than the length of the first side. One of the upper and lower bases is connected to the first busbar 40, and the other is connected to the housing 10. By setting the first cross-section, the connection area between the pressure strip 30 and the first busbar 40, as well as between the pressure strip 30 and the housing 10, can be increased, thereby improving the strength of the connection points.

[0125] In some embodiments of this application, the pressure strip 30 is a solid structure (as shown in FIG8) or a tubular structure (as shown in FIG5). By setting the pressure strip 30, the structure of the pressure strip 30 can be selected according to the assembly requirements, thereby improving the flexibility of the selection of the pressure strip 30 and effectively meeting the assembly requirements of the battery 100.

[0126] It should be noted that when the pressure strip 30 is a solid structure, the overall structural strength of the pressure strip 30 is high, which can form multiple battery cells 21 in the battery module 20 into a whole, and make the whole have sufficient structural strength to improve the overall structural strength of the battery 100.

[0127] When the pressure strip 30 is a tubular structure (or a hollow structure), the pressure strip 30 can form a buffer cavity to absorb external impact forces, thereby reducing the adverse effects of external impacts on the battery assembly 20 and effectively improving the safety performance of the battery 100.

[0128] In some embodiments of this application, as shown in Figures 3, 4 and 7, there are multiple pressure strips 30, and all pressure strips 30 are arranged parallel to each other in the first direction a.

[0129] Specifically, by setting multiple pressure strips 30, the structural strength of the battery assembly 20 can be further improved, thereby effectively enhancing the overall structural strength of the battery 100.

[0130] It should be noted that, in this application, as shown in Figures 3, 4 and 7, each battery assembly 20 has two rows of first busbars 40 in the first direction a, and two adjacent battery assemblies 20 share one row of first busbars 40. Each row of first busbars 40 includes multiple first busbars 40, wherein each row of first busbars 40 is connected to a pressure strip 30.

[0131] In some embodiments of this application, the size of the pressure strip 30 is between 0.5 mm and 30 mm along the third direction c.

[0132] Specifically, by setting the dimensions of the pressure strip 30 in the third direction c, the pressure strip 30 has sufficient strength while effectively reducing its occupation of the internal space of the housing 10, thereby improving the energy density of the battery 100.

[0133] In this application, as shown in Figure 6, along the third direction c, the size of the pressure strip 30 is a first size m. The specific value of the first size m can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11.5 mm, 12.5 mm, 13.5 mm, 14.5 mm, 15.5 mm, 16.5 mm, 17.5 mm, 18.5 mm, 19.5 mm, 20.5 mm, 21.5 mm, 22.5 mm, 23.5 mm, 24.5 mm, 25.5 mm, 26.5 mm, 27.5 mm, 28.5 mm, 29.5 mm, or 30 mm.

[0134] In some embodiments of this application, the pressure strip 30 is a non-metallic component.

[0135] Specifically, the pressure strip 30 of the non-metallic component is connected to the first busbar 40. While improving the overall structural strength of the battery assembly 20, it can reduce the short circuit caused by the conductivity between the pressure strip 30 and the first busbar 40, thereby improving the safety performance of the battery 100.

[0136] In this application, non-metallic components include, but are not limited to, plastic, rubber, or ceramic components.

[0137] In some embodiments of this application, the pressure strip 30 is a metal component, and an insulating structure is provided between the pressure strip 30 and the first busbar 40.

[0138] Specifically, the pressure strip 30 is made of metal, and an insulating structure is provided between the pressure strip 30 and the first busbar 40. The pressure strip 30, being a metal component, has good structural strength, which can further improve the overall structural strength of the battery assembly 20, thereby improving the overall structural strength of the battery 100.

[0139] In this application, metal components include, but are not limited to, stainless steel components, titanium alloy components, or copper components.

[0140] In some embodiments of this application, the insulating structure includes an insulating film or insulating adhesive. Specifically, the insulating structure has a simple structure, which can effectively reduce manufacturing costs.

[0141] When the insulation structure is an insulating film, the insulating film can be wrapped around the outside of the pressure strip 30 to improve the insulation performance of the pressure strip 30. When the insulation structure is insulating adhesive, the insulating adhesive can be pre-applied to the outer surface of the pressure strip 30, or the pressure strip 30 can be bonded to the first busbar 40 using the insulating adhesive.

[0142] As shown in Figures 1 to 8, a second aspect of this application proposes an electrical device, which includes a battery 100 as described above.

[0143] Specifically, all battery modules 20 in battery 100 are arranged in a first direction a, and all battery cells 21 in each battery module 20 are arranged in a second direction b. Adjacent battery cells 21 are electrically connected through a first busbar 40. A pressure strip 30 is disposed inside the housing 10 and in a third direction c. The pressure strip 30 is located between the first busbar 40 and the housing 10, connecting the pressure strip 30 to the side of the first busbar 40 away from the battery module 20. This allows the pressure strip 30 to form an integral unit with the battery module 20. The pressure strip 30 improves the structural strength of the battery module 20, thereby enhancing the overall structural strength of battery 100.

[0144] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0145] As shown in Figures 2 to 8, this application proposes a battery 100, which includes a housing 10, a plurality of battery components 20, a plurality of first busbars 40, and a retaining strip 30. The housing 10 includes a first part 11 and a second part 12. The first part 11 is a cover structure, and the second part 12 is a frame structure with a receiving groove 121. The first part 11 and the second part 12 are connected to cover each other and enclose a receiving space. Multiple battery components 20 are arranged in the receiving space along a first direction a, which is the length or width direction of the housing 10. Each battery component 20 includes multiple battery cells 21. The multiple battery cells 21 are arranged in a second direction b, which intersects with the first direction a. On the side of the battery component 20 located in a third direction c, two adjacent battery cells 21 are electrically connected through a first busbar 40. The third direction c intersects with the first direction a and the second direction b respectively. A pressure strip 30 is located in the receiving space and is located on the same side of the battery component 20 as the multiple first busbars 40. The first busbars 40 on the same battery component 20 are connected to the pressure strip 30, and the pressure strip 30 and the first busbars 40 are insulated from each other.

[0146] Furthermore, the side of the pressure strip 30 facing away from the first busbar 40 is connected to the first part 11 of the housing 10. The connection between the pressure strip 30 and the first busbar 40 is by bonding, and the connection between the pressure strip 30 and the housing 10 is also by bonding.

[0147] Furthermore, the pressure strip 30 includes an extension portion 31, which is flush with one end of the pressure strip 30 away from the battery assembly 20 and extends in a first direction a. The extension portion 31 is connected to the first portion 11. There are two extension portions 31, which are disposed on opposite sides of the pressure strip 30 in the first direction a.

[0148] Furthermore, along the second direction b, the second part 12 of the frame structure includes two opposing support beams 122, at least one of the two support beams 122 being connected to the pressure strip 30, and the connection between the pressure strip 30 and the support beam 122 being bolted.

[0149] Furthermore, the pressure strip 30 is a strip-shaped piece extending along the second direction b. Along the first direction a, multiple first busbars 40 located on the same side of the battery assembly 20 are respectively connected to the pressure strip 30. Along the first direction a, the pressure strip 30 has a first cross-section, the outer contour of which is trapezoidal. The pressure strip 30 is a solid structure or a tubular structure.

[0150] Furthermore, there are multiple pressure strips 30, all of which are arranged in parallel at intervals in the first direction a.

[0151] Furthermore, along the third direction c, the size of the pressure strip 30 is between 0.5 mm and 30 mm.

[0152] Furthermore, the pressure strip 30 may be a non-metallic component or a metallic component, and an insulating structure may be provided between the pressure strip 30 and the first busbar 40.

[0153] Furthermore, the insulating structure includes an insulating film or an insulating adhesive.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, wherein, The battery comprises: a box body having a containing space; a plurality of battery assemblies arranged in the containing space and arranged along a first direction, the first direction being a length direction or a width direction of the box body, each of the battery assemblies comprising a plurality of battery monomers arranged along a second direction intersecting the first direction; a plurality of first busbars, on one side of the battery assembly in a third direction intersecting the first direction and the second direction, two adjacent battery monomers being electrically connected by one first busbar; a pressing strip arranged in the containing space and on the same side of the plurality of first busbars of the battery assembly, at least a part of the first busbars being connected to the pressing strip, and the pressing strip being insulated from the first busbars.

2. The battery of claim 1, wherein, The connection mode between the pressing strip and the first busbar includes bonding, clamping or connecting through a first connecting piece.

3. The battery of claim 1 or 2, wherein, The side of the pressing strip away from the first busbar is connected to the box body.

4. The battery of claim 3, wherein, The connection mode between the pressing strip and the box body includes bonding, clamping or connecting through a second connecting piece.

5. The battery of claim 3 or 4, wherein, The box body comprises a first part and a second part, the first part and the second part jointly forming the containing space, one of the first part and the second part being arranged to face the pressing strip and being connected to the side of the pressing strip away from the battery assembly.

6. The battery of claim 5, wherein, The pressing strip comprises an extension part, and the extension part is arranged to extend in the first direction, the extension part being arranged flush with the side of the pressing strip away from the battery assembly, and the extension part being connected to one of the first part and the second part.

7. The battery of claim 6, wherein, The number of the extension parts is two, and the two extension parts are arranged on opposite sides of the pressing strip in the first direction.

8. The battery of any one of claims 5 to 7, wherein, The first part is a cover plate structure, the second part is a frame structure, the frame structure is provided with a receiving groove, the first part is connected to the second part, the first part and the receiving groove jointly form the containing space, and the pressing strip is connected to the first part.

9. The battery of claim 8, wherein, In the second direction, the frame structure comprises two oppositely arranged support beams, at least one of the two support beams being connected to the pressing strip.

10. The battery of claim 9, wherein, The connection mode between the pressing strip and the support beam includes bonding, welding, clamping or connecting through a connecting piece.

11. The battery of any one of claims 1 to 10, wherein, The pressing strip is a strip-shaped piece arranged to extend in the second direction, and in the first direction, a plurality of first busbars on the same side of the battery assembly are respectively connected to the pressing strip.

12. The battery of claim 11, wherein, In the first direction, the pressing strip has a first cross section, and the outer contour of the first cross section is rectangular or trapezoidal.

13. The battery of claim 11 or 12, wherein, The pressing strip is a solid structure or a tubular structure.

14. The battery of claim 11 or 12, wherein, The number of the pressing strips is a plurality, and all the pressing strips are arranged in parallel in the first direction.

15. The battery of any one of claims 1 to 14, wherein, In the third direction, the size of the pressing strip is between 0.5 millimeters and 30 millimeters.

16. The battery of any one of claims 1 to 14, wherein, The pressing strip is a non-metal component.

17. The battery of any one of claims 1 to 14, wherein, The pressing strip is a metal component, and an insulating structure is arranged between the pressing strip and the first busbar.

18. The battery of claim 17, wherein, The insulating structure comprises an insulating film or an insulating adhesive.

19. An electrical device, comprising: The power consuming device comprises the battery according to any one of claims 1 to 18. The power consuming device comprises the battery according to any one of claims 1 to 18.

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