Battery module, battery device and power utilization device

Abstract

The utility model discloses a battery module, a battery device and a power utilization device. The battery module comprises at least one layer of sub-battery module, the at least one layer of sub-battery module comprises a plurality of first battery cell groups and a plurality of second battery cell groups, each first battery cell group comprises a plurality of first battery monomers and an insulating part, the insulating part wraps the first battery monomers, and each second battery cell group comprises a plurality of second battery monomers; the plurality of first battery cell groups and the plurality of second battery cell groups are alternately arranged along a first direction, so that the insulating part is clamped between the first battery monomer and the second battery monomer, and the first battery monomer is different from the second battery monomer. Therefore, the battery module comprises the first battery monomer and the second battery monomer at the same time, the structural strength of the whole battery module can be further improved, the service life of the battery module can be further prolonged, and the insulating part is clamped between the first battery monomer and the second battery monomer, so that the first battery cell group and the second battery cell group can be fixed and formed conveniently; and risks of electricity crossing and the like are relieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module, a battery device, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle life, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] With the widespread application of CTP (Cell to Pack) technology in battery packs, people are increasingly concerned about battery pack cost, structural strength, and cycle life. Currently, prismatic cells are grouped together by gluing them to crossbars and cold plates to improve overall structural strength. Cylindrical cells, however, utilize steel casings, resulting in a highly robust module. Integrating these two components into a single battery module has become a pressing issue. Utility Model Content

[0004] The main purpose of this application is to provide a battery module, a battery device and an electrical device, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] To solve the above problems, the present application provides a battery module, which includes at least one layer of sub-battery modules, and the at least one layer of sub-battery modules includes multiple first battery cell groups and multiple second battery cell groups. The first battery cell group includes multiple first battery cells and an insulating member, and the insulating member covers the multiple first battery cells. The second battery cell group includes multiple second battery cells. The multiple first battery cell groups and the multiple second battery cell groups are alternately arranged along a first direction so that the insulating member is sandwiched between the first battery cells and the second battery cells, wherein the first battery cells and the second battery cells are different.

[0006] In some embodiments, the plurality of first battery cells are divided into at least one first battery cell column, and the plurality of first battery cells in one first battery cell column are sequentially arranged along a second direction, wherein the first direction and the second direction intersect.

[0007] In some embodiments, the number of the first battery cell columns is at least two, and at least two of the first battery cell columns are arranged along the first direction. The first battery cell group further includes a first cooling member, and the first cooling member is located between the two first battery cell columns.

[0008] In some embodiments, the insulating member includes two insulating plates, each of the insulating plates is extended along the second direction, and the two insulating plates are respectively located on both sides of the first battery cell column in the first direction.

[0009] In some embodiments, the plurality of second battery cells are divided into at least one second battery cell column, and the plurality of second battery cells in one second battery cell column are sequentially arranged along a second direction, wherein the first direction and the second direction intersect.

[0010] In some embodiments, the number of the second battery cell columns is at least two, and at least two of the second battery cell columns are arranged along the first direction. The second battery cell group further includes a second cooling member, and the second cooling member is located between the two second battery cell columns.

[0011] In some embodiments, the number of sub-battery modules is at least two layers, and at least two layers of the sub-battery modules are arranged along a third direction, and the third direction is perpendicular to the first direction. The battery module also includes a support column, and the support column is extended along the third direction. The support column is partially located between the multiple first battery cells of the first battery cell group of one layer of the sub-battery module, and partially located between the multiple first battery cells of the first battery cell group of another layer of the sub-battery module.

[0012] In some embodiments, the first battery cell is a cylindrical battery cell, and the second battery cell is a prismatic battery cell.

[0013] To solve the above problems, the present application provides a battery device, which includes a battery box and a battery module as described above, wherein the battery module is arranged in the battery box.

[0014] In order to solve the above problems, the present application provides an electrical device, which includes the battery device as described above.

[0015] Compared to the prior art, the battery module of the present application includes at least one layer of sub-battery modules, and the at least one layer of sub-battery modules includes multiple first battery cell groups and multiple second battery cell groups. The first battery cell group includes multiple first battery cells and an insulating member, and the insulating member covers the multiple first battery cells. The second battery cell group includes multiple second battery cells. The multiple first battery cell groups and the multiple second battery cell groups are alternately arranged along a first direction so that the insulating member is sandwiched between the first battery cells and the second battery cells, wherein the first battery cells and the second battery cells are different. Through the above embodiment, the battery module includes both the first battery cells and the second battery cells, which can further improve the structural strength of the overall battery module and the service life of the battery module. In addition, the insulating member is sandwiched between the first battery cells and the second battery cells, which can facilitate the fixed molding between the first battery cell group and the second battery cell group, and alleviate the risk of cross-current. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of an embodiment of a battery device provided by the present application;

[0018] Figure 2 This is a schematic structural diagram of a first embodiment of a battery module provided by this application;

[0019] Figure 3 yes Figure 1 The structural diagram of the battery module in the dotted box shown;

[0020] Figure 4 This is a schematic structural diagram of an embodiment of the first battery cell group provided by the present application;

[0021] Figure 5 It is a structural schematic diagram of the second embodiment of the battery module provided by this application.

[0022] Figure numbers: 1, battery module; 2, battery box; 10, sub-battery module; 100, first battery cell group; 110, first battery cell; 120, insulating member; 121, insulating plate; 130, first battery cell array; 140, first cooling member; 200, second battery cell group; 210, second battery cell; 220, second battery cell array; 230, second cooling member; 300, supporting column; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0025] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0028] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0029] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0030] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0031] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0032] Batteries mentioned in this field can be categorized as either primary batteries or rechargeable batteries, depending on whether they are rechargeable. Primary batteries are also called "disposable" batteries or primary batteries because once they are depleted, they cannot be recharged and must be discarded. Rechargeable batteries are also called secondary batteries, secondary batteries, or storage batteries. Rechargeable batteries are manufactured using different materials and processes than primary batteries. Their advantage is that they can be reused multiple times after charging, and their output current capacity is higher than that of most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries offer advantages such as light weight, high capacity (1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, and a very low self-discharge rate. Consequently, despite their relatively high price, they are widely used. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used for these applications is relatively low, they offer high output, high charging current, and a long service life, albeit at a higher cost.

[0033] The batteries described in the embodiments of this application are either rechargeable batteries or disposable batteries. It should be understood that the embodiments disclosed in this application are applicable to any other appropriate type of rechargeable battery. The batteries described in the embodiments disclosed in this application can be directly or indirectly used in appropriate devices to power the devices.

[0034] The present application provides an electrical device, which may include but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft. The electrical device may include a battery device, which may provide electrical energy to achieve corresponding functions.

[0035] The electric device may be an electric vehicle, which may include a battery device.

[0036] The vehicle can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. The vehicle is internally equipped with a battery assembly, which can be located at the bottom, front, or rear of the vehicle. The battery assembly can be used to power the vehicle, for example, as an operating power source. The vehicle can also include a controller and a motor. The controller controls the battery assembly to power the motor, for example, to meet the vehicle's starting, navigation, and operational power needs during driving.

[0037] In some embodiments of the present application, the battery device can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0038] In order to improve the performance of the electrical device, the present application also provides a battery device, see Figure 1 , Figure 1 Schematic diagram of the structure of a battery device according to an embodiment of the present invention.

[0039] The battery device includes a battery box 2 and a battery module 1, and the battery module 1 is arranged in the battery box 2. The battery module 1 can be regarded as an integral unit placed in the battery box 2, and the battery box 2 is used to provide a storage space for the battery module 1. The battery box 2 can adopt a variety of structures. The shape of the battery box 2 may include but is not limited to square, cylindrical or other arbitrary shapes. In some embodiments, the battery box 2 may include a first part and a second part, and the first part and the second part cover each other, and the first part and the second part jointly define a storage space for accommodating the battery module 1. The second part can be a hollow structure with one end open, and the first part can be a plate-like structure, and the first part covers the open side of the second part, so that the first part and the second part jointly define a storage space; the first part and the second part can also be hollow structures with one side open, and the open side of the first part covers the open side of the second part.

[0040] With the widespread application of CTP (Cell to Pack) technology in battery packs, people are increasingly concerned about battery pack cost, structural strength, and cycle life. Currently, prismatic cells are grouped together by gluing them to crossbars and cold plates to improve overall structural strength. Cylindrical cells, however, utilize steel casings, resulting in a highly robust module. Integrating these two components into a single battery module has become a pressing issue.

[0041] In order to solve the technical problems existing in the related art, the present application also provides a battery module 1, see Figures 2 to 4 , Figure 2 This is a schematic structural diagram of a first embodiment of a battery module 1 provided in this application; Figure 3 yes Figure 1 The structural diagram of the battery module 1 in the dotted box is shown; Figure 4 1 is a schematic structural diagram of an embodiment of the first battery cell group 100 provided in the present application.

[0042] The battery module 1 includes at least one layer of sub-battery modules 10, and the at least one layer of sub-battery modules 10 includes multiple first battery cell groups 100 and multiple second battery cell groups 200. The first battery cell group 100 includes multiple first battery cells 110 and an insulating member 120. The insulating member 120 covers the multiple first battery cells 110. The second battery cell group 200 includes multiple second battery cells 210. The multiple first battery cell groups 100 and the multiple second battery cell groups 200 are alternately arranged along the first direction X so that the insulating member 120 is sandwiched between the first battery cells 110 and the second battery cells 210, wherein the first battery cells 110 and the second battery cells 210 are different.

[0043] The first cell group 100 and the second cell group 200 can each be constructed as a single unit. During the manufacturing process, multiple first cell groups 100 and multiple second cell groups 200 can be manufactured separately. These multiple first cell groups 100 and multiple second cell groups 200 can then be assembled to form a layer of sub-battery modules 10. During assembly, the first cell groups 100 and the second cell groups 200 are alternately arranged along the first direction X, with one second cell group 200 sandwiched between two first cell groups 100, and one first cell group 100 sandwiched between two second cell groups 200. The insulating member 120 can gather and secure the multiple first battery cells 110 in the first cell group 100, making it easier to form the multiple first battery cells 110 into the first cell group 100. The insulating member 120 is sandwiched between the first and second battery cells 110, 210, facilitating adhesive bonding and securing of the first and second cell groups 100 and 200. The insulating member 120 may be a plastic insulating member 120 having a non-conductive property and can electrically insulate the battery cells between the first battery cell group 100 and the second battery cell group 200. The first battery cell 110 and the second battery cell 210 being different can be understood as meaning that the first battery cell 110 and the second battery cell 210 have different shapes. For example, one of the first battery cell 110 and the second battery cell 210 is a prismatic battery cell and the other is a cylindrical battery cell, or one of the first battery cell 110 and the second battery cell 210 is a ternary lithium battery cell and the other is a lithium iron phosphate battery cell.

[0044] Through the above embodiment, the battery module 1 includes both the first battery cell 110 and the second battery cell 210, which can further improve the structural strength of the overall battery module 1 and the service life of the battery module 1, and the insulating member 120 is sandwiched between the first battery cell 110 and the second battery cell 210, which can facilitate the fixed molding between the first battery cell group 100 and the second battery cell group 200, and alleviate the risks of cross-current.

[0045] A battery cell is the smallest unit that makes up a battery. A battery cell may include an outer shell, an electrode assembly, and other functional components. The outer shell includes an end cap and a housing. An end cap is a component that fits over the opening of the housing to isolate the internal environment of the battery cell from the external environment. The shape of the end cap can, without limitation, be adapted to the shape of the housing to fit the housing. Optionally, the end cap can be made of a material with a certain degree of hardness and strength (such as aluminum alloy). This makes the end cap less susceptible to deformation during compression and collision, giving the battery cell greater structural strength and improved safety. Functional components such as electrode terminals may be provided on the end cap. Electrode terminals can be used to electrically connect to the electrode assembly for inputting or outputting electrical energy from the battery cell. In some embodiments, the electrode terminals may include poles. The poles may include positive and negative poles, used for outputting current and connecting to external circuits. In some embodiments, the end cap may also be provided with explosion-proof components to release internal pressure when the internal pressure or temperature of the battery cell reaches a threshold. The end cap can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating member 120 can be disposed inside the end cap to isolate the electrical connection components within the housing from the end cap, thereby reducing the risk of short circuits. Exemplarily, insulating member 120 can be made of plastic, rubber, or the like.

[0046] The shell is a component used to cooperate with the end cap to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte and other components. The shell and the end cap can be independent components, and an opening can be set on the shell, and the internal environment of the battery cell is formed by covering the opening with the end cap at the opening. Without limitation, the end cap and the shell can also be integrated. Specifically, the end cap and the shell can form a common connection surface before other components are put into the shell, and when the interior of the shell needs to be encapsulated, the end cap is covered with the shell. The shell can be of various shapes and sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the electrode assembly. The material of the shell can be various, for example, the material of the shell includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0047] The electrode assembly is the component in the battery cell where the electrochemical reaction occurs. One or more electrode assemblies may be contained in the casing. The electrode assembly is mainly formed by winding or stacking the positive and negative electrode sheets, and usually a separator is provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute the tabs. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive and negative electrode active materials react with the electrolyte, and the tabs connect the electrode terminals to form a current circuit.

[0048] Specifically, the first battery cell 110 is a cylindrical battery cell, and the second battery cell 210 is a square battery cell. Cylindrical battery cells have the disadvantages of small cell capacity and difficulty in grouping, but their advantages are high rigidity, a ternary system as the main component, and high energy density. Square battery cells have a simple structure, good stability, and are relatively easy to expand, but compared to cylindrical battery cells, the rigidity of the square battery cell structure is weaker, and after the square battery cells are grouped, due to the superposition of expansion forces, there is a problem that the system life is much lower than the cell life. In this embodiment, the first battery cell 110 is a cylindrical battery cell, and the second battery cell 210 is a square battery cell, which can improve the overall structural strength of the battery module 1, alleviate the impact caused by the expansion of the battery cells, and improve the service life of the battery module 1.

[0049] Among them, when the first battery cell 110 is a cylindrical battery cell and the second battery cell 210 is a square battery cell, the first battery cell group 100 can be bonded and fixed to the bottom of the battery box 2, and the second battery cell group 200 can be bonded and fixed to the first battery cell group 100 through the insulating member 120. The second battery cell group 200 can be bonded to or spaced apart from the bottom of the battery box 2, and the battery module 1 and the battery box 2 can also remain relatively fixed.

[0050] In some embodiments, the plurality of first battery cells 110 are divided into at least one first battery cell column 130. The plurality of first battery cells 110 in a first battery cell column are sequentially arranged along a second direction Y, wherein the first direction X and the second direction Y intersect. The first direction X and the second direction Y may be perpendicular to each other. The plurality of first battery cells 110 are sequentially arranged along the second direction Y, thereby minimizing the overall size of the battery module 1 and facilitating assembly between the first battery cell group 100 and the second battery cell group 200 to form the battery module 1.

[0051] Furthermore, the number of first battery cell columns 130 is at least two, and at least two first battery cell columns 130 are arranged along the first direction X. The first battery cell group 100 also includes a first cooling member 140, and the first cooling member 140 is located between the two first battery cell columns 130. The number of first battery cell columns 130 can be two, three, or other numbers, and at least two first battery cell columns 130 are arranged along the first direction X, which can shorten the overall size of the battery module 1 as much as possible, and facilitate the assembly between the first battery cell group 100 and the second battery cell group 200 to form the battery module 1. The first cooling member 140 is located between the two first battery cell columns 130, and can cool the first battery cells 110 between the first battery cell columns 130 through the first cooling member 140. The shape of the first cooling member 140 can be set according to actual conditions, such as Figure 3 As shown, when the first battery cells 110 are cylindrical battery cells and the first battery cells 110 of two adjacent first battery cell rows 130 are offset in the first direction X, the first cooling member 140 may be shaped as a serpentine plate structure to be tightly sandwiched between the first battery cell group 100 and the second battery cell group 200. Alternatively, when the first battery cells 110 are cylindrical battery cells and the first battery cells 110 of two adjacent first battery cell rows 130 are not offset in the first direction X, the first cooling member 140 may be shaped as a flat plate structure to be tightly sandwiched between the first battery cell group 100 and the second battery cell group 200. Alternatively, when the first battery cells 110 are prismatic battery cells, the first cooling member 140 may be shaped as a flat plate structure to be tightly sandwiched between the first battery cell group 100 and the second battery cell group 200.

[0052] See also Figure 3 and Figure 4 The insulating member 120 includes two insulating plates 121, each extending along the second direction Y. The two insulating plates 121 are located on either side of the first cell row 130 in the first direction X. The insulating plates 121 are plate-shaped. When there is only one first cell row 130, the two insulating plates 121 are located on either side of the first cell row 130 in the first direction X. When there are two first cell rows 130, one insulating plate 121 is located on the side of one first cell row 130 facing away from the other first cell row 130. The side of the insulating plate 121 that contacts the first cell row 130 can be similar in shape to the first battery cell 110 of the first cell row 130. For example, when the first battery cell 110 is cylindrical, the side of the insulating plate 121 that contacts the first cell row 130 can have a cylindrical groove structure. This allows the insulating plate 121 to fit tightly with the cylindrical battery cell, thereby improving the energy density of the battery module 1.

[0053] In some embodiments, the plurality of second battery cells 210 are divided into at least one second battery cell column 220. The plurality of second battery cells 210 in a second battery cell column are sequentially arranged along a second direction Y, wherein the first direction X and the second direction Y intersect. The first direction X and the second direction Y may be perpendicular to each other. The plurality of second battery cells 210 are sequentially arranged along the second direction Y, thereby minimizing the overall size of the battery module 1 and facilitating assembly between the first battery cell group 100 and the second battery cell group 200 to form the battery module 1.

[0054] Furthermore, the number of second battery cell columns 220 is at least two, and at least two second battery cell columns 220 are arranged along the first direction X. The second battery cell group 200 also includes a second cooling member 230, and the second cooling member 230 is located between the two second battery cell columns 220. The number of second battery cell columns 220 can be two, three, or other numbers, and at least two second battery cell columns 220 are arranged along the first direction X, which can shorten the overall size of the battery module 1 as much as possible, and facilitate the assembly between the first battery cell group 100 and the second battery cell group 200 to form the battery module 1. The second cooling member 230 is located between the two second battery cell columns 220, and can cool the second battery cells 210 between the second battery cell columns 220 through the second cooling member 230. The shape of the second cooling member 230 can be set according to actual conditions, such as Figure 3 As shown, when the second battery cells 210 are cylindrical battery cells and the second battery cells 210 of two adjacent second battery cell rows 220 are offset in the first direction X, the second cooling member 230 may be shaped as a serpentine plate structure to be tightly sandwiched between the first battery cell group 100 and the second battery cell group 200. Alternatively, when the second battery cells 210 are cylindrical battery cells and the second battery cells 210 of two adjacent second battery cell rows 220 are not offset in the first direction X, the second cooling member 230 may be shaped as a flat plate structure to be tightly sandwiched between the first battery cell group 100 and the second battery cell group 200. Alternatively, when the second battery cells 210 are prismatic battery cells, the second cooling member 230 may be shaped as a flat plate structure to be tightly sandwiched between the first battery cell group 100 and the second battery cell group 200.

[0055] See also Figure 5 , Figure 5 It is a structural schematic diagram of the second embodiment of the battery module 1 provided in this application.

[0056] The number of sub-battery modules 10 is at least two layers, and the at least two layers of sub-battery modules 10 are arranged along a third direction Z, which is perpendicular to the first direction X. The battery module 1 also includes support pillars 300 extending along the third direction Z. The support pillars 300 are partially located between the multiple first battery cells 110 of the first battery cell group 100 of one layer of sub-battery modules 10, and partially located between the multiple first battery cells 110 of the first battery cell group 100 of another layer of sub-battery modules 10. The first direction X, the second direction Y, and the third direction Z can be perpendicular to each other. The shape of the support pillars 300 can be determined according to actual conditions. The first battery cells 110 and the second battery cells 210 of the at least two layers of sub-battery modules 10 can be spaced apart in the third direction Z. The shape of the support column 300 can be determined based on actual conditions. When the first battery cells 110 of the first cell group 100 are cylindrical, the support column 300 can be cylindrical. When the first battery cells 110 of the first cell group 100 are rectangular, the support column 300 can be square, so that the support column 300 can be arranged alongside the multiple first battery cells 110 of the first cell group 100. The support column 300 can be arranged alongside the multiple first battery cells 110 of the first cell group 100 of a layer of battery module 1. The height of the support column 300 in the third direction Z is significantly greater than the height of the first battery cells 110 in the third direction Z, so that the support column 300 can extend between the multiple first battery cells 110 of the first cell group 100 of another layer of sub-battery module 10. The support column 300 is simultaneously secured to the multiple first battery cells 110 of at least two layers of the first cell group 100, so that the two layers of sub-battery modules 10 can be secured to each other via the support column 300.

[0057] To sum up, the battery module 1 includes both the first battery cell 110 and the second battery cell 210, which can further improve the structural strength of the overall battery module 1 and the service life of the battery module 1, and the insulating part 120 is clamped between the first battery cell 110 and the second battery cell 210, which can facilitate the fixed molding between the first battery cell group 100 and the second battery cell group 200, and alleviate the risks of cross-current.

[0058] 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 them. 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 or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery module, characterized in that: The battery module includes at least one layer of sub-battery modules, at least one layer of the sub-battery module includes multiple first battery cell groups and multiple second battery cell groups, the first battery cell groups include multiple first battery cells and insulating members, the insulating members cover the multiple first battery cells, the second battery cell groups include multiple second battery cells, the multiple first battery cell groups and the multiple second battery cell groups are alternately arranged along a first direction so that the insulating members are sandwiched between the first battery cells and the second battery cells, wherein the first battery cells and the second battery cells are different.

2. The battery module according to claim 1, wherein: The plurality of first battery cells are divided into at least one first battery cell column, and the plurality of first battery cells in one first battery cell column are sequentially arranged along a second direction, wherein the first direction and the second direction intersect.

3. The battery module according to claim 2, characterized in that: The number of the first battery cell columns is at least two, and at least two of the first battery cell columns are arranged along the first direction. The first battery cell group further includes a first cooling member, and the first cooling member is located between the two first battery cell columns.

4. The battery module according to claim 2, wherein: The insulating member includes two insulating plates, each of which is extended along the second direction, and the two insulating plates are respectively located on two sides of the first battery cell column in the first direction.

5. The battery module according to claim 1, wherein: The plurality of second battery cells are divided into at least one second battery cell column, and the plurality of second battery cells in one second battery cell column are sequentially arranged along a second direction, wherein the first direction and the second direction intersect.

6. The battery module according to claim 5, characterized in that: The number of the second battery cell columns is at least two, and the at least two second battery cell columns are arranged along the first direction. The second battery cell group further includes a second cooling member, and the second cooling member is located between the two second battery cell columns.

7. The battery module according to any one of claims 1 to 6, characterized in that: The number of the sub-battery modules is at least two layers, and at least two layers of the sub-battery modules are arranged along a third direction, and the third direction is perpendicular to the first direction. The battery module also includes a support column, and the support column is extended along the third direction. The support column is partially located between the multiple first battery cells of the first battery cell group of one layer of the sub-battery module, and partially located between the multiple first battery cells of the first battery cell group of another layer of the sub-battery module.

8. The battery module according to claim 1, wherein: The first battery cell is a cylindrical battery cell, and the second battery cell is a square battery cell.

9. A battery device, characterized in that: The battery device includes a battery box and a battery module according to any one of claims 1 to 8, wherein the battery module is arranged in the battery box.

10. An electrical device, characterized in that: The electrical device comprises the battery device as claimed in claim 9.

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