Battery, manufacturing system thereof and electric device

Abstract

The embodiment of the utility model provides a battery, a manufacturing system thereof and an electric device. The battery provided by the embodiment of the utility model comprises a plurality of battery modules, each battery module comprises a plurality of battery monomers stacked along a first direction, each battery monomer has a first end face and a second end face which are oppositely arranged along a second direction, the first end face is provided with an electrode terminal, and the plurality of battery modules are stacked along a third direction; and the first direction, the second direction and the third direction are vertical pairwise. Therefore, the proper number of the single batteries in the first direction can be set according to the spatial layout of the electric device such as the interior of a vehicle, meanwhile, the proper size and number of the battery modules in the third direction are set, and the space in the first direction and the space in the third direction are fully utilized. Besides, the orientation of the electrode terminals is different from the stacking direction of the battery monomers and the stacking direction of the battery modules, so that the gaps of the battery monomers in the stacking direction and the gaps of the battery modules in the stacking direction are saved, and the volume energy density of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery and a manufacturing method and system thereof, and an electrical device. Background Art

[0002] Batteries are widely used in electrical devices, such as electric cabinets, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] In the development of battery technology, in addition to improving the performance of battery cells, people are paying more and more attention to the size of electrical devices, hoping to reduce the size of electrical devices as much as possible. This puts forward new requirements for the internal layout of the battery. How to reasonably and flexibly layout the internal structure of the battery is a problem that needs to be solved urgently. Utility Model Content

[0004] The present application provides a battery and a manufacturing method and system thereof, and an electrical device, which can improve the flexibility and rationality of the internal structural layout of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising: a plurality of battery modules, each battery module comprising a plurality of battery cells stacked along a first direction, the battery cells having a first end face and a second end face oppositely arranged along a second direction, the first end face being provided with an electrode terminal, and the plurality of battery modules being stacked along a third direction; the first direction, the second direction, and the third direction being perpendicular to each other.

[0006] The battery provided in the embodiment of the present application is arranged to stack battery cells in a first direction to form a battery module, and at the same time, the battery modules are arranged to stack in a third direction. In this way, the number of battery cells in the first direction can be set appropriately according to the spatial layout of the electrical device such as the interior of the vehicle, and the size and number of battery modules in the third direction can be set appropriately, so as to make full use of the space in the first and third directions and improve the capacity of the battery. In addition, the orientation of the electrode terminal is different from the stacking direction of the battery cells and the stacking direction of the battery modules, so that the gap between the battery cells in the stacking direction and the gap between the battery modules in the stacking direction can be saved, and the volume energy density of the battery can be effectively improved.

[0007] According to the battery provided in the embodiment of the present application, each battery module includes a plurality of battery packs arranged side by side along the second direction, each battery pack includes a plurality of battery cells stacked along the first direction, and the second end faces of the battery cells of two adjacent battery packs are arranged relative to each other, so that the battery can be assembled more conveniently, such as facilitating the installation of components such as sampling harnesses. Such an arrangement can make full use of the space in the second direction of electrical devices such as vehicles, and improve the space utilization rate in the second direction.

[0008] According to the battery provided in the embodiment of the present application, the shell side wall of the battery cell includes two first side walls arranged opposite to each other and two second side walls arranged opposite to each other, wherein the area of ​​the first side wall is greater than the area of ​​the second side wall, and the first side wall is perpendicular to the first direction. This is beneficial to improve the structural stability of the battery pack formed by the battery cell, and further improve the structural stability of the battery module and the battery.

[0009] According to the battery provided by the embodiment of the present application, the maximum dimension of the battery module along the first direction is L1, and the maximum dimension along the second direction is L2, L1 = L2. This facilitates the battery module to form a square envelope, which is beneficial to improving the flexibility of battery module arrangement.

[0010] According to the battery provided by the embodiment of the present application, the second end faces of the battery cells of adjacent battery modules are perpendicular to each other, which is beneficial to improving the bonding strength between adjacent battery modules and further improving the structural strength of the entire battery.

[0011] According to the battery provided in the embodiment of the present application, the battery further includes a reinforcing plate, which is arranged between two adjacent battery modules. With the reinforcing plate, the battery is not prone to deformation, displacement and other problems, thereby improving the overall structural strength of the battery.

[0012] According to the battery provided in the embodiment of the present application, a flow channel is formed in the reinforcing plate, and a fluid is contained in the flow channel, and the fluid is used for heat exchange with the battery module. In this way, the battery module can be heated or cooled by heat exchange between the fluid and the battery module.

[0013] According to the battery provided in the embodiment of the present application, the battery further includes a pipe, which is used to connect the flow channels of the reinforcing plates adjacent to each other along the third direction. Such an arrangement can simplify the structure of the flow channel in the reinforcing plate being connected to the outside world.

[0014] According to the battery provided in the embodiment of the present application, the battery module further includes an end plate, which is arranged on both sides of the stacked battery cells along the first direction; the battery further includes a frame, which is arranged around the outer periphery of the battery module, and the end plate connects the battery module and the frame. The end plate is provided to facilitate the assembly of the battery cells, and the frame can provide a certain degree of protection for the battery module, thereby increasing the service life of the battery module.

[0015] According to the battery provided in the embodiment of the present application, a first boss is formed on the end plate, a second boss is formed on the frame, and the first boss is engaged with the second boss. Such a configuration is conducive to the connection between the end plate and the frame, and is also conducive to the sealing performance of the battery after the two are connected.

[0016] According to the battery provided in the embodiment of the present application, the battery includes a plurality of frames stacked along a third direction, and the adjacent frames along the third direction are sealed and connected. Providing a sealed connection between adjacent frames can effectively reduce the entry of external water and oxygen into the interior of the battery module, thereby reducing the possibility of external water and oxygen causing certain corrosion to the battery cells.

[0017] The battery also includes a mounting frame, and a plurality of battery modules are connected to the mounting frame through a frame.

[0018] According to the battery provided in the embodiment of the present application, the mounting frame is formed with a mounting plate, and two adjacent layers of frames are connected by the mounting plate. This facilitates setting the positions of the battery module and the frame, avoids the possibility of misalignment or deformation of the battery module and the frame during connection with the mounting frame, reduces installation errors, and is conducive to improving the sealing of the battery.

[0019] In a second aspect, an embodiment of the present application provides a method for manufacturing a battery, comprising: providing a plurality of battery cells, each battery cell having a first end face and a second end face relatively arranged along a second direction, and an electrode terminal being arranged on the first end face; stacking the plurality of battery cells along a first direction to form a battery module; stacking the plurality of battery modules along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0020] In a third aspect, an embodiment of the present application provides a battery manufacturing system, comprising: a providing module for providing a plurality of battery cells, the battery cells having a first end face and a second end face relatively arranged along a second direction, the first end face being provided with an electrode terminal; a first assembling module for stacking a plurality of battery cells along a first direction to form a battery module; and a second assembling module for stacking a plurality of assembly modules along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0021] The battery and its manufacturing method and manufacturing system, as well as the power-consuming device provided in the embodiments of the present application, are arranged such that the battery cells are stacked in a first direction to form a battery module, and the battery modules are stacked in a third direction. In this way, the number of battery cells in the first direction can be set appropriately according to the spatial layout of the power-consuming device such as the interior of a vehicle, and the number of battery modules in the third direction can be set appropriately, so as to make full use of the space in the first and third directions and improve the capacity of the battery. In addition, the orientation of the electrode terminals is different from the stacking direction of the battery cells and the stacking direction of the battery modules, so that the gaps between the battery cells in the stacking direction and the gaps between the battery modules in the stacking direction can be saved, and the volume energy density of the battery can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 the drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0024] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0025] Figure 3 A schematic diagram of the structure of a battery provided in some other embodiments of the present application;

[0026] Figure 4 An exploded schematic diagram of a battery cell provided in some embodiments of the present application;

[0027] Figure 5 A schematic diagram of the structure of the connection between the battery module and the frame provided in some embodiments of the present application;

[0028] Figure 6 for Figure 5 Explosion diagram of

[0029] Figure 7 A partially enlarged schematic diagram of a connection structure between a frame and an end plate provided in some embodiments of the present application;

[0030] Figure 8 A schematic diagram of the structure of a battery provided in yet another embodiment of the present application;

[0031] Fig. 9 for Figure 8 A partial enlarged view of the middle A;

[0032] Fig.10 for Fig. 9 Explosion diagram of

[0033] Fig.11 A schematic diagram of a method for manufacturing a battery provided in some embodiments of the present application;

[0034] Fig.12 A schematic block diagram of a battery manufacturing system provided for some embodiments of the present application.

[0035] Description of reference numerals:

[0036] 1. Vehicles;

[0037] 2. Battery; 21. Battery module; 211. Battery pack; 212. End plate; 212a. First boss; 22. Reinforcement plate; 23. Pipe; 24. Frame; 24a. Second mounting hole; 24b. Second boss; 25. Mounting frame; 251. Mounting plate; 251a. First mounting hole;

[0038] 3. Battery cell; 31. Housing assembly; 311. Housing; 311a. Second end surface; 311b. First side wall; 311c. Second side wall; 312. Cover assembly; 3121. End cover; 3121a. First end surface; 3122. Electrode terminal; 32. Electrode assembly;

[0039] 4. Controller;

[0040] 5. Motor;

[0041] 100. Manufacturing system; 110. Providing module; 120. First assembling module; 130. Second assembling module.

[0042] X, first direction; Y, second direction; Z, third direction.

[0043] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0046] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0049] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0050] The term "plurality" used in the present application refers to two or more (including two).

[0051] In the present application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0052] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery cabinet or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0053] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive current collector and a positive convex portion protruding from the positive current collector. The positive current collector is coated with the positive active material layer. At least part of the positive convex portion is not coated with the positive active material layer. The positive convex portion serves as a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive current collector may be aluminum, the positive active material layer includes a positive active material, and the positive active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collector and a negative electrode protrusion protruding from the negative electrode current collector, the negative electrode current collector is coated with a negative electrode active material layer, at least part of the negative electrode protrusion is not coated with the negative electrode active material layer, and the negative electrode protrusion serves as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator may be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc. In addition, the electrode assembly may be a winding structure or a laminated structure, and the embodiments of the present application are not limited thereto.

[0054] The battery cell may further include a housing assembly having a receiving cavity therein, which is a closed space provided by the housing assembly for the electrode assembly and the electrolyte.

[0055] For battery cells, the main safety hazards come from the charging and discharging process, as well as the appropriate ambient temperature design. In order to effectively avoid unnecessary losses, there are generally at least three protection measures for battery cells. Specifically, the protection measures include at least switching elements, selecting appropriate isolation materials, and pressure relief mechanisms. A switching element refers to an element that can stop the battery from charging or discharging when the temperature or resistance in the battery cell reaches a certain threshold. The isolation element is used to isolate the positive and negative pole pieces. When the temperature rises to a certain value, it can automatically dissolve the micron-level (or even nano-level) micropores attached to it, so that metal ions cannot pass through the isolation element, terminating the internal reaction of the battery cell.

[0056] The inventor discovered that during the battery assembly process, after multiple battery cells are stacked in a first direction, the multiple stacked battery cells cannot be stacked again, and the space inside the power-consuming device cannot be fully utilized, resulting in a problem of waste of internal battery space. In order to meet the demand for power per unit area, multiple layers of battery cells stacked in a first direction need to be stacked, but the assembly operation of stacking multiple layers of battery cells stacked in a first direction is relatively complicated.

[0057] Based on the above problems discovered by the inventors, the inventors have improved the structure of the battery. The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0058] The battery can be a cabinet or a battery pack.

[0059] The electrical device may be a vehicle, an energy storage cabinet, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0060] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle 1 as an example.

[0061] Figure 1 This is a schematic diagram of the structure of a vehicle 1 provided in some embodiments of the present application. Figure 1As shown, a battery 2 is disposed inside the vehicle 1, and the battery 2 may be disposed at the bottom, head, or tail of the vehicle 11. The battery 2 may be used to power the vehicle 1, for example, the battery 2 may be used as an operating power source for the vehicle 1.

[0062] The vehicle 1 may further include a controller 4 and a motor 5 , wherein the controller 4 is used to control the battery 2 to supply power to the motor 5 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1 .

[0063] In some embodiments of the present application, the battery 2 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0064] like Figure 2 and Figure 3 , which are schematic diagrams of the structures of different batteries 2 provided in the embodiments of the present application, Figure 4 A schematic diagram of an exploded view of a battery cell 3 in a battery 2 provided in an embodiment of the present application is shown.

[0065] In the battery 2, the battery cell 3 can be one or more. If there are more than one battery cell 3, the battery cells 3 can be connected in series, in parallel or in mixed connection. Mixed connection means that the battery cells 3 are both connected in series and in parallel. The battery cells 3 can be directly connected in series, in parallel or in mixed connection, and the battery cells 3 form a whole. Of course, the battery cells 3 can also be connected in series, in parallel or in mixed connection to form a battery module 21, and the battery modules 21 can be connected in series, in parallel or in mixed connection to form a whole.

[0066] The multiple battery cells 3 in the battery module 21 may be electrically connected via a busbar component (not shown in the figure) to achieve parallel connection, series connection or mixed connection of the multiple battery cells 3 in the battery module 21 .

[0067] The battery cell 3 provided in the embodiment of the present application includes an electrode assembly 32 and a housing assembly 31 , and the electrode assembly 32 is accommodated in the housing assembly 31 .

[0068] In some embodiments, the housing component 31 can also be used to contain electrolyte, such as electrolyte. The housing component 31 can be in various structural forms.

[0069] In some embodiments, the housing assembly 31 may include a shell 311 and a cover assembly 312, wherein the shell 311 is a hollow structure with one side open, and the cover assembly 312 covers the opening of the shell 311 and forms a sealed connection to form a housing cavity for accommodating the electrode assembly 32 and the electrolyte.

[0070] In some embodiments, the cover assembly 312 includes an end cover 3121, and the end cover 3121 covers the opening of the housing 311. The end cover 3121 can be of various structures, for example, the end cover 3121 is a plate-like structure, a hollow structure with one end open, etc. Figure 4 In the embodiment, the shell 311 is a rectangular parallelepiped structure, the end cover 3121 is a plate-shaped structure, and the end cover 3121 covers the opening at the top of the shell 311.

[0071] The end cap 3121 may be made of an insulating material (e.g., plastic) or a conductive material (e.g., metal). When the end cap 3121 is made of a metal material, the cap assembly 312 may further include an insulating member, which is located on a side of the end cap 3121 facing the electrode assembly 32 to insulate and separate the end cap 3121 from the electrode assembly 32.

[0072] In some embodiments, the cap assembly 312 may further include an electrode terminal 3122, which is mounted on the end cap 3121. There are two electrode terminals 3122, which are respectively defined as a positive electrode terminal and a negative electrode terminal, and both the positive electrode terminal and the negative electrode terminal are used to be electrically connected to the electrode assembly 32 to output the electric energy generated by the electrode assembly 32.

[0073] In other embodiments, the housing assembly 31 may also be other structures, for example, the housing assembly 31 includes a shell 311 and two cover assemblies 312, the shell 311 is a hollow structure with two opposite openings, and one cover assembly 312 is correspondingly covered at one opening of the shell 311 and forms a sealed connection to form a receiving cavity for accommodating the electrode assembly 32 and the electrolyte. In this structure, one cover assembly 312 may be provided with two electrode terminals 3122, while the other cover assembly 312 may not be provided with an electrode terminal 3122, or each of the two cover assemblies 312 may be provided with one electrode terminal 3122.

[0074] In the battery cell 3, the electrode assembly 32 contained in the housing assembly 31 may be one or more. Figure 4 In the embodiment, there are two electrode assemblies 32 .

[0075] In the battery 2 provided in the embodiment of the present application, the battery 2 includes a plurality of battery modules 21, and each battery module 21 includes a plurality of battery cells 3 stacked along a first direction X. The battery cell 3 has a first end face 3121a and a second end face 311a oppositely arranged along a second direction Y, and the first end face 3121a is provided with an electrode terminal 3122. The plurality of battery modules 21 are stacked along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0076] The first direction X and the second direction Y are directions determined based on the structure and placement position of the battery cells 3, and different battery modules 21 are stacked along the third direction Z. The first direction X of the battery modules 21 in different layers along the third direction Z can be arranged in the same direction, and the second direction Y can also be arranged in the same direction. The first directions X of the battery modules 21 in different layers along the third direction Z can also be perpendicular to each other, and the second directions Y can also be perpendicular to each other.

[0077] Each battery module 21 includes a plurality of battery cells 3 stacked along a first direction X. The plurality of battery cells 3 may be arranged in one row or in multiple rows.

[0078] like Figure 5 The embodiment in which a plurality of battery cells 3 are distributed in two rows is shown. Figure 6 yes Figure 5 Schematic diagram of the decomposition.

[0079] The battery cells 3 are arranged to be stacked along a first direction X, and the electrode terminals 3122 are arranged on a side of the battery cells 3 opposite to each other along a second direction Y, and the first direction X and the second direction Y are perpendicular to each other, that is, the stacking direction of the battery cells 3 and the orientation of the electrode terminals 3122 on the battery cells 3 are perpendicular to each other, so that the battery cells 3 are stacked along the first direction X.

[0080] In some examples, the electrode terminal 3122 is disposed only on the first end surface 3121 a , and the electrode terminal 3122 includes a positive terminal and a negative terminal, and both the positive terminal and the negative terminal are disposed on the first end surface 3121 a .

[0081] In other embodiments, the electrode terminal 3122 is provided on both the first end surface 3121a and the second end surface 311a, and the positive terminal and the negative terminal are respectively provided on one of the first end surface 3121a and the second end surface 311a.

[0082] The battery cells 3 stacked along the first direction X may be connected together by gluing, or may be directly attached or arranged with gaps. The battery modules 21 stacked along the third direction Z may be arranged with or without intermediate objects.

[0083] The battery 2 provided in the embodiment of the present application is provided with battery cells 3 stacked in a first direction X to form a battery module 21, and the battery modules 21 are stacked in a third direction Z. In this way, the number of battery cells 3 in the first direction X can be set appropriately according to the spatial layout of the electric device such as the interior of the vehicle 1, and the size and number of battery modules 21 in the third direction Z can be set appropriately, so as to make full use of the space in the first direction X and the third direction Z, and improve the capacity of the battery 2. In addition, the orientation of the electrode terminal 3122 is different from the stacking direction of the battery cells 3 and the stacking direction of the battery modules 21, so that the gap between the battery cells 3 along their own stacking direction and the gap between the battery modules 21 along their own stacking direction can be saved, and the volume energy density of the battery 2 can be effectively improved.

[0084] In some embodiments, each battery module 21 includes a plurality of battery groups 211 arranged side by side along the second direction Y, each battery group 211 includes a plurality of battery cells 3 stacked along the first direction X, and the second end surfaces 311a of the battery cells 3 of two adjacent battery groups 211 are arranged opposite to each other.

[0085] The battery module 21 includes a plurality of battery groups 211 arranged side by side along the second direction Y. Such an arrangement can make full use of the space of the electric device such as the vehicle 1 in the second direction Y, improve the space utilization rate in the second direction Y, and thus improve the capacity of the battery 2. The second end faces 311a of the battery cells 3 of two adjacent battery groups 211 are arranged opposite to each other, that is, the electrode terminals 3122 of the battery cells 3 of two adjacent battery groups 211 are arranged in opposite directions, so that the two adjacent battery groups 211 are arranged more closely, and thus help to improve the space utilization rate of the battery groups 211 along the second direction Y. At the same time, the battery 2 can be assembled more conveniently, for example, it is convenient to install components such as sampling harnesses.

[0086] In some embodiments, the side wall of the shell 311 of the battery cell 3 includes two oppositely disposed first side walls 311b and two oppositely disposed second side walls 311c, wherein the area of ​​the first side wall 311b is greater than the area of ​​the second side wall 311c, and the first side wall 311b is perpendicular to the first direction X.

[0087] The first side wall 311b is arranged perpendicular to the first direction X, that is, the first side wall 311b is arranged perpendicular to the stacking direction of the battery cells 3. Along the first direction X, the first side walls 311b of adjacent battery cells 3 are arranged adjacent to each other, and the area of ​​the first side wall 311b is larger than the area of ​​the second side wall 311c, that is, the first side wall 311b is the surface with a larger area of ​​the battery cell 3, so that the surfaces with a larger area of ​​adjacent battery cells 3 stacked along the first direction X are arranged adjacent to each other, which is beneficial to improving the structural stability of the battery pack 211 formed by the battery cells 3, and further improving the structural stability of the battery module 21 and the battery 2.

[0088] In some embodiments, the maximum dimension of the battery module 21 along one direction is L1, and the maximum dimension along the second direction Y is L2, where L1 = L2.

[0089] The maximum dimension L1 of the battery module 21 along the first direction X is the longest distance between any two points of the battery module 21 along the first direction X. Similarly, the maximum dimension L2 of the battery module 21 along the second direction Y is the longest distance between any two points of the battery module 21 along the second direction Y. By setting L1=L2, the rectangular envelope of the orthographic projection of the battery module 21 perpendicular to the third direction Z can be made square, and the orientation of the electrode terminals 3122 of the battery cells 3 of different battery modules 21 can be set as needed, which is conducive to improving the flexibility of the arrangement of the battery module 21.

[0090] In some embodiments, the second end surfaces 311 a of the battery cells 3 of adjacent battery modules 21 are perpendicular to each other.

[0091] The second end faces 311a of the battery cells 3 of the adjacent battery modules 21 are perpendicular to each other, that is, the stacking direction of the battery cells 3 of the adjacent battery modules 21, that is, the first direction X, is perpendicular to each other. In this way, when the battery 2 is subjected to vibration or impact load, the adjacent battery 2 modules are not prone to deformation, displacement, etc., which is conducive to improving the bonding strength between the adjacent battery modules 21, and further improving the structural strength of the entire battery 2.

[0092] In some embodiments, L1=L2 and the second end faces 311a of the battery cells 3 of adjacent battery modules 21 are perpendicular to each other, which can improve the structural strength of the battery 2 and maximize the space utilization of the battery 2 in the first direction X and the second direction Y.

[0093] In some embodiments, the battery 2 further includes a reinforcing plate 22 , which is disposed between adjacent battery modules 21 .

[0094] Specifically, the reinforcing plate 22 can be arranged between two adjacent battery modules 21 and on the outer side of the outermost battery module 21 along the third direction Z. The reinforcing plate 22 can be in contact with the adjacent battery modules 21, or can be arranged at intervals along the third direction Z. In this way, when the battery 2 is subjected to external loads such as vibration and impact, the reinforcing plate 22 can bear part of the load, thereby improving the carrying capacity of the battery 2, making it less likely for the battery 2 to be deformed or displaced, thereby improving the overall structural strength of the battery 2.

[0095] The reinforcing plate 22 may be just a plate-like structure, which only serves to strengthen the structural strength of the battery 2. In addition, the reinforcing plate 22 may also be integrated with other functions, such as cooling, etc., so as to have a corresponding structure.

[0096] In some embodiments, a flow channel (not shown) is formed in the reinforcing plate 22 , and a fluid is contained in the flow channel. The fluid is used for heat exchange with the battery module 21 .

[0097] Specifically, the fluid can be a liquid or a gas, as long as it can flow in the flow channel and perform heat exchange with the battery module 21 .

[0098] It is understandable that the battery module 21 itself needs to be maintained within a reasonable temperature range to work better. By setting the fluid to have a suitable temperature, the fluid can heat or cool the battery module 21. In some embodiments, the battery 2 works in an extremely cold environment, and the battery module 21 needs to be heated to ensure its normal operation. Therefore, a reasonable temperature of the fluid can be set so that the fluid heats the battery module 21 during the flow in the flow channel.

[0099] In other embodiments, when the battery 2 is working under normal conditions, the battery module 21 needs to be cooled to ensure normal operation. Therefore, a reasonable temperature of the fluid can be set so that the battery module 21 can be cooled while the fluid is flowing in the flow channel.

[0100] In order to enable the fluid to exchange heat with the outside world and to ensure that the fluid flowing inside the reinforcing plate 22 is always maintained within the corresponding temperature range, the flow channel in each reinforcing plate 22 can be directly connected to the relevant pipeline 23 outside the battery 2, or the flow channels of some or all of the reinforcing plates 22 in the battery 2 can be connected to each other and then connected to the outside world.

[0101] In some embodiments, the battery 2 further includes a pipe 23 , and the pipe 23 is used to connect the flow channels of the reinforcing plates 22 adjacent to each other along the third direction Z.

[0102] Specifically, the flow channel of the reinforcing plate 22 inside the battery 2 is connected through the pipe 23 and then connected to the relevant pipe 23 outside the battery 2, so that the fluid in the flow channel can exchange heat with the outside. This arrangement can simplify the structure of the flow channel in the reinforcing plate 22 communicating with the outside.

[0103] During the process of assembling the battery cells 3 into the battery pack 211 or the battery 2 module, the battery cells 3 may be directly stacked or assembled together with the battery cells 3 through other structures.

[0104] In some embodiments, the battery module 21 further includes end plates 212 disposed on both sides of the stacked battery cells 3 along the first direction X. The battery 2 further includes a frame 24 disposed around the outer periphery of the battery module 21 , and the end plates 212 connect the battery module 21 and the frame 24 .

[0105] Specifically, the end plates 212 are arranged on both sides of the battery pack 211 or the battery 2 module along the stacking direction of the battery cells 3. Each battery 2 module may correspond to two end plates 212, or each battery pack 211 may correspond to two end plates 212. The end plates 212 are conducive to the assembly of the battery cells 3 during the stacking process of the battery cells 3, and the end plates 212 have the function of protecting the battery cells 3, reducing the risk of damage to the battery cells 3 during the assembly process. The frame 24 can further protect the battery module 21 and increase the service life of the battery module 21.

[0106] It can be understood that the end plate 212 is a part of the battery module 21. In the embodiment where L1=L2 of the battery module 21 is set, the maximum dimension L1 of the battery module 21 along the first direction X and the maximum dimension L2 along the first direction X are respectively the maximum dimensions of the battery cell 3 and the end plate 212 along the first direction X and the second direction Y after the combination of the battery cell 3 and the end plate 212. Such a configuration allows the structure after the battery cell 3 and the end plate 212 are assembled to form a square envelope.

[0107] The end plate 212 and the frame 24 may be directly abutted, threadedly connected, or clamped.

[0108] Figure 7 A partial enlarged schematic diagram of the connection structure between the frame 24 and the end plate 212 is shown.

[0109] In some embodiments, a first boss 212 a is formed on the end plate 212 , and a second boss 24 b is formed on the frame 24 , and the second boss 24 b is engaged with the first boss 212 a .

[0110] Specifically, the first boss 212a and the second boss 24b may be protruded toward the first direction X or toward the second direction Y at the same time. Figure 7 As shown, during the installation process, the frame 24 is sleeved on the peripheral side of the battery module 21, and the frame 24 is moved along the third direction Z so that the second boss 24b gradually approaches the first boss 212a from the upper side of the first boss 212a. When the two partially overlap in the first direction X, an interference fit is formed, and the second boss 24b continues to move along the third direction Z until the second boss 24b passes through the first boss 212a and is located at the lower side of the first boss 212a, and the force applied to the frame 24 is stopped. Due to the stopping effect of the first boss 212a on the second boss 24b, the second boss 24b cannot return to the upper side of the first boss 212a without external force, that is, the clamping connection between the first boss 212a and the second boss 24b is completed.

[0111] It is understandable that the end plate 212 and the frame 24 are connected in a snap-fit ​​manner, which can ensure that the end plate 212 and the frame 24 have a certain connection strength, while also reducing the possibility of reducing the internal sealing of the battery 2 due to the provision of structures such as connection holes.

[0112] One battery module 21 of the battery 2 may correspond to one frame 24 , or multiple or all battery modules 21 of a battery 2 may correspond to one frame 24 , which is not limited here.

[0113] In some embodiments, the battery 2 includes a plurality of frames 24 stacked along the third direction Z, and adjacent frames 24 along the third direction Z are sealed and connected.

[0114] A frame 24 may be provided to surround only one battery module 21, that is, one frame 24 corresponds to one battery module 21, or a frame 24 may be provided to surround multiple battery modules 21, that is, one frame 24 corresponds to multiple battery modules 21, which may be reasonably selected according to the specific application. Adjacent frames 24 may be sealed and connected by applying a sealant, or by providing a sealant between the two. By providing adjacent frames 24 with sealed connections, it is possible to effectively reduce the entry of external water and oxygen into the interior of the battery module 21, thereby reducing the possibility of external water and oxygen causing certain corrosion to the battery cells 3.

[0115] like Figure 8 Shown is a schematic structural diagram of a battery provided in another embodiment of the present application.

[0116] In some embodiments, the battery 2 further includes a mounting rack 25 , and the plurality of battery modules 21 are connected to the mounting rack 25 via a frame 24 .

[0117] Specifically, the overall structural type of the mounting frame 25 is compatible with the overall structural type of the stacked battery module 21. The battery module 21 is connected to the mounting frame 25 through the frame 24. The mounting frame 25 serves as a supporting structure of the battery module 21 and bears the weight of the battery module 21. At the same time, when the battery 2 is impacted, the mounting frame 25 can block part of the impact and vibration load for the battery module 21, thereby reducing the possibility of damage to the battery module 21 due to external impact and vibration. Therefore, by setting the frame 24, it is beneficial to improve the overall structural strength of the battery 2, facilitate the transportation and installation of the battery 2, and improve the service life of the battery 2.

[0118] In some embodiments, Fig. 9 and 10 As shown, the mounting frame 25 is formed with a mounting plate 251 , and two adjacent layers of frames 24 are connected via the mounting plate 251 .

[0119] The mounting plate 251 may be in the shape of a straight plate, or in the shape of an “L” or other shapes, as long as it can connect adjacent beam layer frames 24 .

[0120] The mounting plate 251 can be integrally formed with the mounting frame 25 during the manufacturing process of the mounting frame 25, or can be separately formed and then mounted on the mounting frame 25, and there is no limitation here.

[0121] In some embodiments, Fig. 9 and Fig.10 As shown, a first mounting hole 251a can be provided on the mounting plate 251, a second mounting hole 24a can be provided on the frame 24, two adjacent frames 24 are respectively arranged on both sides of the mounting plate 251 along the third direction Z, and the two adjacent frames 24 are respectively connected to the first mounting hole 251a on the mounting plate 251 through the second mounting hole 24a.

[0122] It can be understood that the mounting frame 25 is formed with a mounting plate 251, and the mounting plate 251 is connected to the battery module 21 through the frame 24. The position of the appropriate connecting plate can be set in advance according to the installation position of the frame 24 and the battery module 21. In this way, it is convenient to set the position of the battery module 21 and the frame 24, avoid the possibility of misalignment or deformation of the battery module 21 and the frame 24 during the connection process of the mounting frame 25, reduce installation errors, and help improve the sealing of the battery 2.

[0123] Fig.11 A schematic flow chart of a method for manufacturing a battery cell 3 provided in some embodiments of the present application.

[0124] The present application embodiment provides a method for manufacturing a battery 2, including:

[0125] S10, providing a plurality of battery cells 3, wherein the battery cells 3 have a first end surface 3121a and a second end surface 311a oppositely disposed along the second direction Y, and the first end surface 3121a is provided with an electrode terminal 3122;

[0126] S20, stacking a plurality of battery cells 3 along a first direction X to form a battery module 21;

[0127] S30, stacking the plurality of battery modules 21 along the third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0128] It should be noted that the relevant structure of the battery 2 manufactured by the above-mentioned battery manufacturing method can refer to the battery 2 provided in the above-mentioned embodiments.

[0129] Fig.12 A schematic block diagram of a manufacturing system 100 for a battery 2 provided in some embodiments of the present application.

[0130] like Fig.12 As shown, the manufacturing system 100 of the battery 2 of the embodiment of the present application includes:

[0131] A module 110 is provided for providing a plurality of battery cells 3, wherein the battery cells 3 have a first end face 3121a and a second end face 311a which are arranged opposite to each other along a second direction Y, and the first end face 3121a is provided with an electrode terminal 3122; a first assembly module 120 is used for stacking the plurality of battery cells 3 along a first direction X to form a battery module 21; and a second assembly module 130 is used for stacking the plurality of assembly modules along a third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0132] The relevant structure of the battery 2 manufactured by the manufacturing system 100 can refer to the battery 2 provided in the above embodiments.

[0133] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A plurality of battery modules, each of the battery modules comprising a plurality of battery cells stacked along a first direction, the battery cells having a first end face and a second end face opposite to each other along a second direction, the first end face being provided with an electrode terminal, the plurality of battery modules being stacked along a third direction; the first direction, the second direction, and the third direction being perpendicular to each other; The battery module further includes end plates, which are arranged on both sides of the plurality of stacked battery cells along the first direction; The battery further includes a frame, the frame is arranged around the outer periphery of the battery module, and the end plate connects the battery module and the frame; The battery further includes a mounting frame, and a plurality of the battery modules are connected to the mounting frame via a frame.

2. The battery according to claim 1, characterized in that Each of the battery modules includes a plurality of battery groups arranged side by side along the second direction, each of the battery groups includes a plurality of battery cells stacked along the first direction, and the second end faces of the battery cells of two adjacent battery groups are arranged opposite to each other.

3. The battery according to claim 1 or 2, characterized in that: The shell side wall of the battery cell includes two first side walls arranged opposite to each other and two second side walls arranged opposite to each other, wherein the area of ​​the first side wall is larger than that of the second side wall, and the first side wall is perpendicular to the first direction.

4. The battery according to claim 1, characterized in that The maximum dimension of the battery module along the first direction is L1, and the maximum dimension of the battery module along the second direction is L2, where L1=L2.

5. The battery according to claim 1, characterized in that The second end surfaces of the battery cells of adjacent battery modules are perpendicular to each other.

6. The battery according to claim 1, characterized in that The battery further includes a reinforcing plate, which is disposed between two adjacent battery modules.

7. The battery according to claim 6, characterized in that A flow channel is formed in the reinforcing plate, and a fluid is contained in the flow channel. The fluid is used for heat exchange with the battery module.

8. The battery according to claim 7, characterized in that The battery further includes a pipe for connecting the flow channels of the reinforcing plates adjacent to each other along the third direction.

9. The battery according to claim 1, characterized in that A first boss is formed on the end plate, a second boss is formed on the frame, and the first boss is engaged with the second boss.

10. The battery according to claim 1, characterized in that The battery includes a plurality of the frames stacked along the third direction, and the frames adjacent to each other along the third direction are sealed and connected.

11. The battery according to claim 1, characterized in that The mounting frame is formed with a mounting plate, and two adjacent layers of the frames are connected by the mounting plate.

12. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 11, wherein the battery is used to provide electrical energy.

13. A battery manufacturing system, comprising: Providing a module for providing a plurality of battery cells, wherein the battery cells have a first end surface and a second end surface that are oppositely disposed along a second direction, and the first end surface is provided with an electrode terminal; A first assembly module, used for stacking a plurality of the battery cells along a first direction to form a battery module; The second assembly module is used to stack the plurality of assembly modules along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

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