Battery and electric equipment

Abstract

The embodiment of the invention provides a battery and electric equipment. The battery comprises a battery monomer group and a first bus member, the battery monomer group comprises a plurality of first battery monomers and a plurality of second battery monomers which are arranged side by side, and the height of the second battery monomers is greater than that of the first battery monomers; adjacent first and second battery cells are electrically connected by a first bus member. The battery provided by the embodiment of the invention has relatively high energy density and relatively long cycle life.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the battery manufacturing process, how to strike a balance between the battery's energy density and cycle life is an issue that cannot be ignored. Summary of the invention

[0004] The present application provides a battery and an electrical device, so that the battery has a higher energy density and a higher cycle life.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising a battery cell group and a first busbar component, wherein the battery cell group comprises a plurality of first battery cells and a plurality of second battery cells placed side by side, wherein the height of the second battery cells is greater than the height of the first battery cells; adjacent first battery cells and second battery cells are electrically connected via the first busbar component.

[0007] According to the battery of the embodiment of the present application, the battery cell group includes a first battery cell and a second battery cell of different heights. The first battery cell can have a higher energy density, and the second battery cell can have a higher cycle life. The adjacent first battery cell and the second battery cell are connected by a first bus member to facilitate the electrical connection between the first battery cell and the second battery cell, so that the battery can have both the characteristics of higher energy density and higher cycle life.

[0008] According to some embodiments of the present application, the first collector member includes a first connection portion and a second connection portion connected to each other, the first connection portion is electrically connected to the first battery cell, the second connection portion is electrically connected to the second battery cell, and along the height direction, the second connection portion is higher than the first connection portion.

[0009] In the above solution, the first connecting portion and the second connecting portion have different heights, so as to adapt to the first battery cell and the second battery cell of different heights, and to facilitate the connection between the first battery cell and the second battery cell.

[0010] According to some embodiments of the present application, the first conduit component also includes a first reinforcement portion, and the first connecting portion and the second connecting portion are connected by the first reinforcement portion; the first reinforcement portion is bent relative to the first connecting portion, and / or the second connecting portion is bent relative to the first reinforcement portion.

[0011] In the above solution, the provision of the first reinforcing portion can increase the overall strength of the first current collecting member, so that the first connecting portion and the first battery cell are firmly connected, and the second connecting portion and the second battery cell are firmly connected.

[0012] According to some embodiments of the present application, the first reinforcement portion is arched in a direction away from the second battery cell.

[0013] In the above solution, the first reinforcement portion arches in a direction away from the second battery cell, so that the first reinforcement portion is away from the second battery cell, thereby reducing the risk of interference between the first reinforcement portion and the second battery cell.

[0014] According to some embodiments of the present application, the first reinforcement portion includes a first connecting segment, a second connecting segment and a third connecting segment, the first connecting segment is connected to the first connecting portion and extends in a direction away from the first battery cell, the second connecting segment is connected to the second connecting portion and extends in a direction away from the second battery cell, one end of the third connecting segment is connected to an end of the first connecting segment away from the first connecting portion, and the other end of the third connecting segment is connected to an end of the second connecting segment away from the second connecting portion.

[0015] In the above scheme, the first connecting section connects the first connecting part, the second connecting section connects the second connecting part, and the third connecting section connects the first connecting section and the second connecting section, so that the first connecting part is connected to the first battery monomer and the second connecting part is connected to the second battery monomer. The structure is simple and easy to process and manufacture.

[0016] According to some embodiments of the present application, the first connecting portion and the second connecting portion are respectively parallel to the third connecting section.

[0017] In the above solution, the first connection portion and the second connection portion are respectively parallel to the third connection section, which can not only reasonably utilize the assembly space but also reduce the risk of interference between the first reinforcement portion and the second battery cell.

[0018] According to some embodiments of the present application, the first collecting component is integrally formed.

[0019] In the above solution, the first collector component is integrally formed, which is convenient for processing and manufacturing.

[0020] According to some embodiments of the present application, the first busbar component includes a plurality of conductive sheets, and the plurality of conductive sheets are stacked.

[0021] In the above solution, a plurality of conductive sheets are stacked and arranged, which can increase the strength of the first current collecting member.

[0022] According to some embodiments of the present application, the battery further includes a first separator, and along the height direction, the first separator is located between the first current collecting member and the adjacent first and second battery cells.

[0023] In the above solution, the first isolating member is used to isolate the first current collecting member from the adjacent first battery cell and the adjacent second battery cell to reduce the risk of short circuit.

[0024] According to some embodiments of the present application, the first battery cell and the second battery cell both include electrode terminals, the first insulating member is provided with a first avoidance portion and a second avoidance portion, the electrode terminal of the first battery cell and / or a portion of the first collector component extend into the first avoidance portion to be connected to each other, and the electrode terminal of the second battery cell and / or a portion of the first collector component extend into the second avoidance portion to be connected to each other.

[0025] In the above scheme, the electrode terminal of the first battery cell and / or part of the first collector component extend into the first avoidance portion to facilitate the electrical connection between the first battery cell and the first collector component; the electrode terminal of the second battery cell and / or part of the second collector component extend into the second avoidance portion to facilitate the electrical connection between the second battery cell and the second collector component.

[0026] According to some embodiments of the present application, the first avoidance portion and the second avoidance portion are both through holes, the first conduit component is provided with a first protrusion and a second protrusion, the first protrusion is configured to extend into the corresponding through hole and connect with the electrode terminal of the first battery cell, and the second protrusion is configured to extend into the corresponding through hole and connect with the electrode terminal of the second battery cell.

[0027] In the above scheme, the first avoidance portion and the second avoidance portion are both through holes, which are easy to process and manufacture; the first protrusion is configured to extend into the corresponding through hole, and the second protrusion is configured to extend into the corresponding through hole, which can facilitate the connection between the first collector component and the first battery cell, and the connection between the second collector component and the second battery cell.

[0028] According to some embodiments of the present application, the first isolation member includes a bending portion, and the bending portion is located between adjacent first battery cells and second battery cells.

[0029] In the above solution, the bent portion is located between the adjacent first battery cell and the second battery cell to match the structure of the first current collecting member for easy assembly.

[0030] According to some embodiments of the present application, the battery further includes: a second busbar member, and two adjacent first battery cells are electrically connected via the second busbar member.

[0031] In the above solution, the second busbar member is used to realize the electrical connection between two adjacent first battery cells.

[0032] According to some embodiments of the present application, the second current collecting member includes two third connecting portions, the two third connecting portions are electrically connected to the two first battery cells respectively, and the two third connecting portions have the same height.

[0033] In the above solution, the two third connection parts are electrically connected to the two first battery cells respectively, and the two third connection parts have the same height, which is convenient for processing and manufacturing and reasonably utilizes the structural space.

[0034] According to some embodiments of the present application, the second current collecting member further includes a second reinforcing portion, the second reinforcing portion connects the two third connecting portions, and the second reinforcing portion arches in a direction away from the first battery cell.

[0035] In the above solution, the provision of the second reinforcement portion can increase the overall strength of the second current collecting member, and the second reinforcement portion is arched in a direction away from the first battery cell, which can reduce the risk of short circuit.

[0036] According to some embodiments of the present application, the battery further includes a second separator, and along the height direction, the second separator is located between the second current collecting member and two adjacent first battery cells.

[0037] In the above solution, the second isolating member is used to isolate the second current collecting member from two adjacent first battery cells to reduce the risk of short circuit.

[0038] According to some embodiments of the present application, two adjacent first battery cells each include an electrode terminal, the second insulating member is provided with two third avoidance portions, the electrode terminals of the two adjacent first battery cells correspond one-to-one to the two third avoidance portions, and the electrode terminals of the first battery cells and / or portions of the second collector components extend into the corresponding third avoidance portions to be connected to each other.

[0039] In the above scheme, two adjacent first battery cells each include an electrode terminal, the second insulating member is provided with two third avoidance portions, the electrode terminals of the two adjacent first battery cells correspond one-to-one to the two third avoidance portions, and the electrode terminals of the first battery cells and / or part of the second collector component extend into the corresponding third avoidance portions to facilitate the connection between the first battery cells and the second collector component.

[0040] According to some embodiments of the present application, the two third avoidance portions are through holes, the second collector member is provided with two third protrusions, and the two third protrusions are configured to extend into corresponding through holes respectively and connect with electrode terminals of two adjacent first battery cells.

[0041] In the above solution, the third avoidance portion is a through hole, the second current collecting member is provided with a third protrusion, and the third protrusion is configured to extend into the corresponding through hole to facilitate the connection between the second current collecting member and the first battery cell.

[0042] According to some embodiments of the present application, the battery further includes a first isolator and a second isolator. Along the height direction, the first isolator is located between the first collector member and the adjacent first and second battery cells, and the second isolator is located between the second collector member and the two adjacent first battery cells.

[0043] In the above solution, the first isolating member is used to isolate the first current collecting member from the adjacent first battery cell and the second battery cell, and the second isolating member is used to isolate the second current collecting member from the two adjacent first battery cells, which can reduce the risk of short circuit.

[0044] According to some embodiments of the present application, the first isolation member and the second isolation member are integrally formed.

[0045] In the above solution, the first isolating member and the second isolating member are integrally formed, which is convenient for processing and manufacturing, and convenient for assembling the first isolating member and the second isolating member.

[0046] According to some embodiments of the present application, a plurality of first battery cells and a plurality of second battery cells are staggered along the first direction.

[0047] In the above scheme, multiple first battery cells and multiple second battery cells are staggered along the first direction. When the first battery cell is a lithium iron phosphate battery and the second battery cell is a ternary lithium battery, the characteristics of the lithium iron phosphate battery, which has relatively stable chemical properties and good thermal runaway performance, can be taken into account. To a certain extent, the spread of thermal runaway of the ternary lithium battery can be improved, thereby increasing the cycle life of the battery.

[0048] According to some embodiments of the present application, a plurality of first battery cells are sequentially arranged along a first direction, and a plurality of second battery cells are located on both sides of the plurality of first battery cells along the first direction.

[0049] In the above solution, the plurality of first battery cells are arranged in sequence along the first direction, and the plurality of second battery cells are arranged on both sides of the plurality of first battery cells along the first direction, which facilitates the assembly of the battery and reduces the difficulty of assembly.

[0050] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery as provided in any of the above embodiments.

[0051] Batteries are used to provide electrical energy to electrical devices.

[0052] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0055] Figure 2 An exploded view of a battery provided for some embodiments of the present application;

[0056] Figure 3 A schematic diagram of assembling a battery cell group and a first current collecting member provided in some embodiments of the present application;

[0057] Figure 4 for Figure 3 A top view of

[0058] Figure 5 A schematic diagram of assembling adjacent first battery cells and second battery cells and a first current collecting member provided in some embodiments of the present application;

[0059] Figure 6 Schematic diagram of assembly of a battery cell group and a first current collecting member and a second current collecting member provided in other embodiments of the present application;

[0060] Figure 7 A schematic structural diagram of a first flow-collecting component provided in some embodiments of the present application;

[0061] Figure 8 A schematic diagram of assembling two adjacent first battery cells and a second current collecting member provided in some embodiments of the present application;

[0062] Fig. 9 A schematic diagram of the structure of two rows of battery cells provided in some embodiments of the present application.

[0063] Icon: 100-battery; 10-case; 11-first subcase; 12-second subcase; 20-battery cell group; 21-first battery cell; 22-second battery cell; 23-electrode terminal; 30-first collector component; 31-first connecting portion; 311-first protrusion; 32-second connecting portion; 321-second protrusion; 33-first reinforcement portion; 331-first connecting section; 332-second connecting section; 333-third connecting section; 34-conductive sheet; 41-first insulating member; 411-first avoidance portion; 412-second avoidance portion; 413-bending portion; 42-second insulating member; 421-third avoidance portion; 50-second collector component; 51-third connecting portion; 511-third protrusion; 52-second reinforcement portion; 200-controller; 300-motor; 1000-vehicle. DETAILED DESCRIPTION

[0064] 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 and completely 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.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning 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.

[0066] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0067] 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.

[0068] 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.

[0069] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0070] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0071] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0072] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0073] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0074] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0075] The battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0076] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0077] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0078] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0079] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0080] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0081] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0082] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used.

[0083] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0084] As an example, the negative electrode active material may adopt the negative electrode active material for the battery known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials and lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0085] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0086] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.

[0087] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0088] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0089] In some embodiments, the electrode assembly is a laminate structure.

[0090] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0091] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0092] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab of the electrode assembly. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through an adapter. The electrode terminal may be disposed on the end cap, or may be disposed on the housing.

[0093] In some embodiments, an explosion-proof valve is provided on the housing, and the explosion-proof valve is used to release the internal pressure of the battery cell.

[0094] The development of battery technology must take into account many design factors at the same time, such as reliability, discharge capacity, charge and discharge rate and other performance parameters. In addition, the energy density and cycle life of the battery must also be considered.

[0095] At present, multiple battery cells in the same battery are of the same type. For example, taking lithium batteries as an example, multiple battery cells in the same battery are only lithium iron phosphate batteries, or only ternary lithium batteries. However, different types of battery cells have different characteristics. For example, lithium iron phosphate batteries have a higher cycle life, and ternary lithium batteries have a higher energy density. Batteries composed of battery cells of the same type have relatively limited performance and cannot take into account both higher energy density and higher cycle life.

[0096] In view of this, in order to solve the problem that the performance limitation of the battery and the inability to take into account both high energy density and high cycle life, an embodiment of the present application provides a battery, which includes a battery cell group and a first busbar component, the battery cell group includes a plurality of first battery cells and a plurality of second battery cells, adjacent first battery cells and second battery cells are electrically connected through the first busbar component, and when other specifications are the same, the height of the first battery cell and the height of the second battery cell are different, and the two can be different types of battery cells. For example, the first battery cell and the second battery cell can be a battery with high energy density and a battery with high cycle life, respectively, and the second battery cell can be a battery with high energy density, so that the battery can take into account both high energy density and high cycle life to meet different performance requirements of the battery.

[0097] In such a battery, the height of the first battery cell is different from the height of the second battery cell, so that the first battery cell and the second battery cell can be set as different types of batteries. For example, the first battery cell can be a lithium iron phosphate battery with a higher cycle life, and the second battery cell can be a ternary lithium battery with a higher energy density. Compared with a single ternary lithium battery, the battery of the present application includes a lithium iron phosphate battery. The lithium iron phosphate battery has relatively stable chemical properties and better thermal runaway performance, and can improve the spread of thermal runaway of the ternary lithium battery to a certain extent. In the present application, different numbers of first battery cells and second battery cells can be set according to needs, combining the two properties of higher cycle life and higher energy density, so that the battery can have both higher energy density and higher cycle life.

[0098] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery disclosed in the present application.

[0099] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0100] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0101] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0102] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0103] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0104] Please refer to Figure 2 , Figure 2 An exploded view of a battery provided for some embodiments of the present application. The battery 100 includes a case 10 and a battery cell group 20, and the battery cell group 20 is contained in the case 10. Among them, the case 10 is used to provide a storage space for the battery cell group 20, and the case 10 can adopt a variety of structures. In some embodiments, the case 10 may include a first sub-case 11 and a second sub-case 12, and the first sub-case 11 and the second sub-case 12 cover each other, and the first sub-case 11 and the second sub-case 12 jointly define a storage space for accommodating the battery cell group 20. The second sub-case 12 may be a hollow structure with one end open, and the first sub-case 11 may be a plate-like structure, and the first sub-case 11 covers the open side of the second sub-case 12, so that the first sub-case 11 and the second sub-case 12 jointly define a storage space; the first sub-case 11 and the second sub-case 12 may also be hollow structures with one side open, and the open side of the first sub-case 11 covers the open side of the second sub-case 12.

[0105] In the battery 100, the battery cell group 20 may include a plurality of battery cells, and the plurality of battery cells may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the plurality of battery cells are connected in series and in parallel. The plurality of battery cells may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the plurality of battery cells may be accommodated in the box 10; of course, the battery 100 may also be a battery module formed by first connecting a plurality of battery cells in series, in parallel, or in a mixed connection, and then the plurality of battery modules may be connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the plurality of battery cells.

[0106] Among them, the battery cell can be a secondary battery or a primary battery; the battery cell can be a lithium iron phosphate battery, a ternary lithium battery, etc.

[0107] Please refer to Figures 3 to 6 , Figure 3 A schematic diagram of assembling a battery cell group and a first current collecting member provided in some embodiments of the present application, Figure 4 for Figure 3 A top view of Figure 5 A schematic diagram of assembling adjacent first battery cells and second battery cells and a first current collecting member provided in some embodiments of the present application, Figure 6Schematic diagram of assembly of a battery cell group and a first current collector and a second current collector provided for other embodiments of the present application. According to some embodiments of the present application, the present application provides a battery 100, which includes a battery cell group 20 and a first current collector 30. The battery cell group 20 includes a plurality of first battery cells 21 and a plurality of second battery cells 22 placed side by side, and the height of the second battery cell 22 is greater than the height of the first battery cell 21; the adjacent first battery cells 21 and the second battery cells 22 are electrically connected through the first current collector 30.

[0108] In the figure, the direction indicated by the letter Z may be the height direction of the battery cell. The electrode terminal of the battery cell may be located at one end of the height direction of the battery cell, that is, when the battery cell is placed upright, the electrode terminal is arranged upward. In some embodiments, the height direction Z may also be the height direction of the battery 100.

[0109] In the battery cell group 20, the height direction Z may intersect with the arrangement direction of the plurality of battery cells (collectively referred to as the first battery cell 21 and the second battery cell 22), that is, the stacking direction of the plurality of battery cells may intersect with the height direction Z. Alternatively, the stacking direction of the plurality of battery cells may be perpendicular to the height direction Z.

[0110] The plurality of first battery cells 21 and the plurality of second battery cells 22 are placed side by side, which means that the plurality of first battery cells 21 and the plurality of second battery cells 22 are arranged side by side along a preset direction, for example, the plurality of first battery cells 21 and the plurality of second battery cells 22 can be arranged side by side in a direction perpendicular to the large surface. The large surface refers to a surface of a battery cell with a larger area, and the plurality of first battery cells 21 and the plurality of second battery cells 22 can be arranged side by side in a direction perpendicular to the large surface, which can reasonably utilize the assembly space to improve the energy density of the battery 100.

[0111] The specifications of the first battery cell 21 and the second battery cell 22 are different in the height direction, and the specifications of the first battery cell 21 and the second battery cell 22 are the same in the length direction and the width direction.

[0112] The type of the first battery cell 21 and the type of the second battery cell 22 can be different. For example, the first battery cell 21 can be a lithium iron phosphate battery and the second battery cell 22 can be a ternary lithium battery; or, the first battery cell 21 can be a ternary lithium battery and the second battery cell 22 can be a lithium iron phosphate battery.

[0113] Optionally, the first battery cell 21 may be a lithium iron phosphate battery, which has relatively stable chemical properties, good thermal runaway performance, and a relatively long cycle life; the second battery cell 22 may be a ternary lithium battery, which has a relatively high energy density.

[0114] The first current collecting member 30 is a component for realizing electrical connection between the first battery cell 21 and the second battery cell 22 . The first current collecting member 30 is a conductive member, for example, a metal member (such as iron, copper or alloys thereof).

[0115] The first bus member 30 can accommodate the first battery cell 21 and the second battery cell 22 having different heights so that the first battery cell 21 and the second battery cell 22 are electrically connected.

[0116] Compared with a single type of ternary lithium battery, the chemical properties of lithium iron phosphate batteries are more stable, and the thermal runaway performance is better, which can improve the spread of thermal runaway of ternary lithium batteries to a certain extent. In the present application, the battery cell group 20 includes a first battery cell 21 and a second battery cell 22 of different heights. The first battery cell 21 can be a ternary lithium battery with a higher energy density, and the second battery cell 22 can be a lithium iron phosphate battery with a higher cycle life. The adjacent first battery cell 21 and the second battery cell 22 are connected by the first conduit member 30 to facilitate the electrical connection between the first battery cell 21 and the second battery cell 22, so that the battery 100 includes both a ternary lithium battery and a lithium iron phosphate battery, which can take into account the characteristics of higher energy density and higher cycle life, and meet the needs of batteries 100 with different performances.

[0117] Please refer to Figure 5 According to some embodiments of the present application, the first collector member 30 includes a first connection portion 31 and a second connection portion 32 connected to each other, the first connection portion 31 is electrically connected to the first battery cell 21, and the second connection portion 32 is electrically connected to the second battery cell 22, and along the height direction Z, the second connection portion 32 is higher than the first connection portion 31.

[0118] The first connection portion 31 is a portion of the first busbar member 30 for connection with the first battery cell 21 , and the second connection portion 32 is a portion of the first busbar member 30 for connection with the second battery cell 22 .

[0119] The first connection portion 31 and the second connection portion 32 may be disposed in various positions. For example, the first connection portion 31 may intersect with the second connection portion 32 , or the first connection portion 31 may be parallel to the second connection portion 32 .

[0120] In some embodiments, the first connection portion 31 may be parallel to the second connection portion 32 , which not only facilitates the assembly of the first connection portion 31 with the first battery cell 21 and the second connection portion 32 with the second battery cell 22 , but also reduces space occupancy and saves assembly space.

[0121] In the above solution, the first connection portion 31 and the second connection portion 32 have different heights, so as to adapt to the first battery cell 21 and the second battery cell 22 of different heights and realize the connection between the first battery cell 21 and the second battery cell 22 .

[0122] Please refer to Figure 5 According to some embodiments of the present application, the first conduit component 30 also includes a first reinforcement portion 33, and the first connection portion 31 and the second connection portion 32 are connected by the first reinforcement portion 33; the first reinforcement portion 33 is bent relative to the first connection portion 31, and / or the second connection portion 32 is bent relative to the first reinforcement portion 33.

[0123] The first reinforcement portion 33 is a reinforcement portion of the first current collecting member 30. The first reinforcement portion 33 may be a reinforcement rib, for example, the first reinforcement portion 33 may be formed by stamping.

[0124] In some embodiments, the first reinforcing portion 33 may extend from one end to the other end of the first collecting member 30 in the width direction.

[0125] The first reinforcing portion 33 is bent relative to the first connecting portion 31 , and the second connecting portion 32 is bent relative to the first reinforcing portion 33 , so that the first collecting component 30 is formed into a bent structure. The first collecting component 30 can be stamped and formed, which is convenient for processing and manufacturing.

[0126] In the above solution, the provision of the first reinforcing portion 33 can increase the overall strength of the first current collecting member 30 , so that the first connecting portion 31 and the first battery cell 21 are firmly connected, and the second connecting portion 32 and the second battery cell 22 are firmly connected.

[0127] Please refer to Figure 5 According to some embodiments of the present application, the first reinforcement portion 33 is arched in a direction away from the second battery cell 22 .

[0128] The first reinforcing portion 33 is arched in a direction away from the second battery cell 22, and the first reinforcing portion 33 may be formed by the side of the first current collecting member 30 facing the second battery cell 22 protruding toward the side away from the second battery cell 22. That is, the first reinforcing portion 33 occupies a smaller space on the side of the first current collecting member 30 facing the second battery cell 22, thereby reducing the probability of the first reinforcing portion 33 contacting the second battery cell 22 and the first battery cell 21, and also reducing the risk of short circuit.

[0129] In the above solution, the first reinforcement portion 33 is arched in a direction away from the second battery cell 22 , so that the first reinforcement portion 33 is away from the second battery cell 22 , thereby reducing the risk of interference between the first reinforcement portion 33 and the second battery cell 22 .

[0130] Please refer to Figure 5 According to some embodiments of the present application, the first reinforcement portion 33 includes a first connecting segment 331, a second connecting segment 332 and a third connecting segment 333, the first connecting segment 331 is connected to the first connecting portion 31 and extends in a direction away from the first battery cell 21, the second connecting segment 332 is connected to the second connecting portion 32 and extends in a direction away from the second battery cell 22, one end of the third connecting segment 333 is connected to an end of the first connecting segment 331 away from the first connecting portion 31, and the other end of the third connecting segment 333 is connected to an end of the second connecting segment 332 away from the second connecting portion 32.

[0131] When the first current collecting member 30 is unfolded, that is, before the first reinforcing portion 33 is arched, the first connecting segment 331 , the third connecting segment 333 and the second connecting segment 332 may be sequentially arranged along the length direction of the first current collecting member 30 .

[0132] The extending direction of the first connecting section 331 and the extending direction of the second connecting section 332 may intersect, or the extending direction of the first connecting section 331 and the extending direction of the second connecting section 332 may be parallel.

[0133] In some embodiments, in the height direction Z, the distance between the third connecting segment 333 and the second connecting portion 32 is smaller than the distance between the third connecting segment 333 and the first connecting portion 31. In this case, in the height direction Z, the distance between the third connecting segment 333 and the second connecting portion 32 is smaller, and the second connecting segment 332 can be tilted relative to the second connecting portion 32 to reduce the difficulty of processing.

[0134] In the above scheme, the first connecting section 331 connects the first connecting part 31, the second connecting section 332 connects the second connecting part 32, and the third connecting section 333 connects the first connecting section 331 and the second connecting section 332, so that the first connecting part 31 is connected to the first battery cell 21 and the second connecting part 32 is connected to the second battery cell 22. The structure is simple and easy to process and manufacture.

[0135] Please refer to Figure 5 According to some embodiments of the present application, the first connection portion 31 and the second connection portion 32 are respectively parallel to the third connection section 333 .

[0136] The first connection portion 31 and the second connection portion 32 are parallel to the third connection section 333 , respectively. That is, the first connection portion 31 , the second connection portion 32 and the third connection section 333 are parallel to each other.

[0137] In the above solution, the first connection portion 31 and the second connection portion 32 are respectively parallel to the third connection section 333 , which can not only reasonably utilize the assembly space, but also reduce the risk of interference between the first reinforcement portion 33 and the second battery cell 22 .

[0138] According to some embodiments of the present application, the first collecting member 30 is integrally formed.

[0139] The first collecting member 30 may be formed by stamping.

[0140] In the above solution, the first collector member 30 is integrally formed, which is convenient for processing and manufacturing.

[0141] Please refer to Figure 7 , Figure 7 A schematic structural diagram of a first current collecting component provided in some embodiments of the present application. According to some embodiments of the present application, the first current collecting component 30 includes a plurality of conductive sheets 34, and the plurality of conductive sheets 34 are stacked.

[0142] In some embodiments, the plurality of conductive sheets 34 may be integrally formed and bent into a stacked structure. For example, one conductive sheet 34 may be connected to an edge of another conductive sheet 34 and bent relative to the other conductive sheet 34 so that the two conductive sheets 34 are stacked.

[0143] In order to facilitate the connection with the first battery cell 21 and the second battery cell 22, a single conductive sheet 34 of the first convergence component 30 is connected to the corresponding first battery cell 21 and the corresponding second battery cell 22, and other positions of the first convergence component 30 can be a structure in which multiple conductive sheets 34 are stacked, which not only facilitates the connection between the first convergence component 30 and the first battery cell 21 and the second battery cell 22, but also can enhance the overall strength of the first convergence component 30.

[0144] In the above solution, the plurality of conductive sheets 34 are stacked and arranged, which can increase the strength of the first current collecting member 30 .

[0145] In some embodiments, the plurality of conductive sheets 34 are thinned to form the first connecting portion 31 and the second connecting portion 32 to facilitate electrical connection with the first battery cell 21 and the second battery cell 22 .

[0146] Please refer to Figure 5 According to some embodiments of the present application, the battery 100 further includes a first isolating member 41 , and along the height direction Z, the first isolating member 41 is located between the first collector member 30 and the adjacent first and second battery cells 21 and 22 .

[0147] The first spacer 41 is a component for isolating the first current collecting member 30 from the adjacent first and second battery cells 21 and 22 . The first spacer 41 may be an insulating member, such as rubber, plastic, or the like.

[0148] The first spacer 41 can reduce the risk of the first busbar member 30 contacting other regions of the first battery cell 21 except the required connection portion and the risk of the first busbar member 30 contacting other regions of the second battery cell 22 except the required connection portion, thereby reducing the risk of short circuit.

[0149] Please refer to Figure 5 According to some embodiments of the present application, the first battery cell 21 and the second battery cell 22 both include an electrode terminal 23, the first isolation member 41 is provided with a first avoidance portion 411 and a second avoidance portion 412, the electrode terminal 23 of the first battery cell 21 and / or a portion of the first collector member 30 extend into the first avoidance portion 411 to be connected to each other, and the electrode terminal 23 of the second battery cell 22 and / or a portion of the first collector member 30 extend into the second avoidance portion 412 to be connected to each other.

[0150] The electrode terminal 23 is a component for conducting electric energy of the battery cell. Both the first battery cell 21 and the second battery cell 22 include an electrode terminal 23 .

[0151] The first escape portion 411 is used to escape the electrode terminal 23 of the first battery cell 21, or to escape the portion of the first busbar member 30 connected to the electrode terminal 23 of the first battery cell 21. That is, the electrode terminal 23 of the first battery cell 21 can be connected to the first busbar member at the first escape portion 411.

[0152] The second escape portion 412 is used to escape the electrode terminal 23 of the second battery cell 22, or to escape the portion of the first busbar member 30 connected to the electrode terminal 23 of the second battery cell 22. That is, the electrode terminal 23 of the second battery cell 22 can be connected to the first busbar member at the second escape portion 412.

[0153] At the first avoidance portion 411, the electrode terminal 23 of the first battery cell 21 can extend into the first avoidance portion 411, or a portion of the first collector component 30 can extend into the first avoidance portion 411, or both the electrode terminal 23 of the first battery cell 21 and a portion of the first collector component 30 can extend into the first avoidance portion 411, thereby achieving electrical connection between the electrode terminal 23 of the first battery cell 21 and the first collector component 30.

[0154] At the second avoidance portion 412, the electrode terminal 23 of the second battery cell 22 can extend into the second avoidance portion 412, or a portion of the second collector component can extend into the second avoidance portion 412, or both the electrode terminal 23 of the second battery cell 22 and a portion of the second collector component can extend into the second avoidance portion 412, thereby achieving electrical connection between the electrode terminal 23 of the second battery cell 22 and the second collector component.

[0155] In the above scheme, the electrode terminal 23 of the first battery cell 21 and / or part of the first collector component 30 extend into the first avoidance portion 411 to facilitate the electrical connection between the first battery cell 21 and the first collector component 30; the electrode terminal 23 of the second battery cell 22 and / or part of the second collector component extend into the second avoidance portion 412 to facilitate the electrical connection between the second battery cell 22 and the second collector component.

[0156] Please refer to Figure 5 According to some embodiments of the present application, the first avoidance portion 411 and the second avoidance portion 412 are both through holes, and the first conduit member 30 is provided with a first protrusion 311 and a second protrusion 321, the first protrusion 311 is configured to extend into the corresponding through hole and connect with the electrode terminal 23 of the first battery cell 21, and the second protrusion 321 is configured to extend into the corresponding through hole and connect with the electrode terminal 23 of the second battery cell 22.

[0157] The first avoidance portion 411 may be a through hole penetrating the first isolating member 41 in the height direction Z, and the second avoidance portion 412 may be a through hole penetrating the first isolating member 41 in the height direction Z.

[0158] The first protrusion 311 is a portion of the first bus member 30 for electrically connecting to the first battery cell 21 . The second protrusion 321 is a portion of the first bus member 30 for electrically connecting to the second battery cell 22 .

[0159] The first protrusion 311 is configured to extend into the corresponding through hole to be electrically connected to the electrode terminal 23 of the first battery cell 21 . The second protrusion 321 is configured to extend into the corresponding through hole to be electrically connected to the electrode terminal 23 of the second battery cell 22 .

[0160] In the above scheme, the first avoidance portion 411 and the second avoidance portion 412 are both through holes, which are convenient for processing and manufacturing; the first protrusion 311 is configured to extend into the corresponding through hole, and the second protrusion 321 is configured to extend into the corresponding through hole, which can facilitate the connection between the first confluence component 30 and the first battery cell 21, and the connection between the second confluence component and the second battery cell 22.

[0161] In the embodiment where the first collecting member 30 includes a first connecting portion 31 and a second connecting portion 32 , the first protrusion 311 is disposed on the first connecting portion 31 , and the second protrusion 321 is disposed on the second connecting portion 32 .

[0162] In some embodiments, the first avoidance portion 411 and the second avoidance portion 412 may also be notches disposed on the first flow collecting component 30 , or may also be grooves disposed on the first flow collecting component 30 .

[0163] Please refer to Figure 5According to some embodiments of the present application, the first isolation member 41 includes a bending portion 413 , and the bending portion 413 is located between the adjacent first battery cell 21 and the second battery cell 22 .

[0164] The bent portion 413 is arched in a direction away from the second battery cell 22 . In the embodiment where the first current collecting member 30 includes the first reinforcement portion 33 , the bent portion 413 is disposed corresponding to the first reinforcement portion 33 .

[0165] In the above solution, the bent portion 413 is located between the adjacent first battery cell 21 and the second battery cell 22 to match the structure of the first current collecting member 30 for easy assembly.

[0166] Please refer to Figure 6 , and further refer to Figure 8 , Figure 8 Schematic diagram of assembly of two adjacent first battery cells and a second current collector member provided for some embodiments of the present application. According to some embodiments of the present application, the battery 100 further includes a second current collector member 50 , and the two adjacent first battery cells 21 are electrically connected via the second current collector member 50 .

[0167] The second current collecting member 50 is a component for realizing electrical connection between two adjacent first battery cells 21. The second current collecting member 50 is a conductive member, and the material of the second current collecting member 50 can be metal, for example, iron, copper or alloys thereof.

[0168] In the above solution, the second busbar member 50 is used to realize the electrical connection between two adjacent first battery cells 21 .

[0169] Please refer to Figure 8 According to some embodiments of the present application, the second collector member 50 includes two third connection portions 51 , the two third connection portions 51 are electrically connected to the two first battery cells 21 , respectively, and the two third connection portions 51 have the same height.

[0170] The third connection portion 51 is a portion of the second current collecting member 50 for electrically connecting to the first battery cell 21 .

[0171] The two third connecting portions 51 are arranged at intervals to match two adjacent first battery cells 21 .

[0172] The two third connection portions 51 have the same height, and the two third connection portions 51 may be parallel to each other.

[0173] In the above solution, the two third connection parts 51 are electrically connected to the two first battery cells 21 respectively, and the two third connection parts 51 have the same height, which is convenient for processing and manufacturing and reasonably utilizes the structural space.

[0174] Please refer to Figure 8According to some embodiments of the present application, the second collector member 50 further includes a second reinforcing portion 52 , the second reinforcing portion 52 connects the two third connecting portions 51 , and the second reinforcing portion 52 arches in a direction away from the first battery cell 21 .

[0175] The second reinforcement portion 52 is a reinforcement portion of the second current collecting member 50. The second reinforcement portion 52 may be a reinforcement rib, for example, the second reinforcement portion 52 may be formed by stamping.

[0176] In some embodiments, the second reinforcing portion 52 may extend from one end to the other end of the second collecting member 50 in the width direction.

[0177] The second reinforcing portion 52 is bent relative to the third connecting portion 51 , so that the second current collecting component 50 is formed into a bent structure. The second current collecting component 50 can be formed by stamping, which is convenient for processing and manufacturing.

[0178] In the above solution, the provision of the second reinforcing portion 52 can increase the overall strength of the second current collecting member 50 , and the second reinforcing portion 52 is arched in a direction away from the first battery cell 21 , which can reduce the risk of short circuit.

[0179] According to some embodiments of the present application, the second collecting member 50 is integrally formed.

[0180] Please refer to Figure 8 According to some embodiments of the present application, the battery 100 further includes a second separator 42 . Along the height direction Z, the second separator 42 is located between the second current collecting member 50 and two adjacent first battery cells 21 .

[0181] The second separator 42 is a component used to isolate the second current collecting member 50 from two adjacent first battery cells 21 . The second separator 42 may be an insulating member, such as rubber, plastic, etc.

[0182] The second spacer 42 can reduce the risk of the second current collecting member 50 contacting other regions of the first battery cell 21 except for the required connection portion, so as to reduce the risk of short circuit.

[0183] Please refer to Figure 8 According to some embodiments of the present application, two adjacent first battery cells 21 each include an electrode terminal 23, the second isolation member 42 is provided with two third avoidance portions 421, the electrode terminals 23 of the two adjacent first battery cells 21 correspond one-to-one to the two third avoidance portions 421, and the electrode terminals 23 of the first battery cells 21 and / or portions of the second collector member 50 extend into the corresponding third avoidance portions 421 to be connected to each other.

[0184] The third avoidance portion 421 is used to avoid the electrode terminal 23 of the first battery cell 21, or to avoid the portion of the second current collector 50 connected to the electrode terminal 23 of the first battery cell 21. That is, in two adjacent first battery cells 21, the electrode terminal 23 of the first battery cell 21 can be connected to the second current collector 50 at the third avoidance portion 421.

[0185] At the third avoidance portion 421, the electrode terminal 23 of the first battery cell 21 can extend into the third avoidance portion 421, or a portion of the second collector component 50 can extend into the third avoidance portion 421, or both the electrode terminal 23 of the first battery cell 21 and a portion of the second collector component 50 can extend into the third avoidance portion 421, thereby achieving electrical connection between the electrode terminal 23 of the first battery cell 21 and the second collector component 50.

[0186] In the above scheme, two adjacent first battery cells 21 each include an electrode terminal 23, and the second isolation member 42 is provided with two third avoidance portions 421. The electrode terminals 23 of the two adjacent first battery cells 21 correspond one-to-one to the two third avoidance portions 421, and the electrode terminals 23 of the first battery cells 21 and / or part of the second collector component 50 extend into the corresponding third avoidance portions 421 to facilitate the connection between the first battery cells 21 and the second collector component 50.

[0187] Please refer to Figure 8 According to some embodiments of the present application, the two third avoidance portions 421 are through holes, and the second collector member 50 is provided with two third protrusions 511, which are configured to extend into corresponding through holes and connect with the electrode terminals 23 of two adjacent first battery cells 21 respectively.

[0188] The third through hole may be a through hole penetrating the second isolation member 42 in the height direction Z.

[0189] The third protrusion 511 is a portion of the second bus member 50 for electrically connecting to the first battery cell 21 .

[0190] The third protrusion 511 is configured to extend into the corresponding through hole to be electrically connected to the electrode terminal 23 of the first battery cell 21 .

[0191] In the above solution, the third avoidance portion 421 is a through hole, and the second collector member 50 is provided with a third protrusion 511 , which is configured to extend into the corresponding through hole to facilitate the connection between the second collector member 50 and the first battery cell 21 .

[0192] Please refer to Figure 5 and Figure 8According to some embodiments of the present application, the battery 100 also includes a first isolation member 41 and a second isolation member 42. Along the height direction Z, the first isolation member 41 is located between the first collector member 30 and the adjacent first battery cell 21 and the second battery cell 22, and the second isolation member 42 is located between the second collector member 50 and the two adjacent first battery cells 21.

[0193] In the above solution, the first isolating member 41 is used to isolate the first collector member 30 from the adjacent first battery cell 21 and second battery cell 22 , and the second isolating member 42 is used to isolate the second collector member 50 from the two adjacent first battery cells 21 , thereby reducing the risk of short circuit.

[0194] According to some embodiments of the present application, the first isolation member 41 and the second isolation member 42 are integrally formed.

[0195] The first spacer 41 and the second spacer 42 may be injection molded.

[0196] In the above solution, the first isolating member 41 and the second isolating member 42 are integrally formed, which is convenient for processing and manufacturing, and convenient for assembling the first isolating member 41 and the second isolating member 42 .

[0197] Please refer to Figure 3 According to some embodiments of the present application, a plurality of first battery cells 21 and a plurality of second battery cells 22 are alternately arranged along the first direction X.

[0198] In the figure, the direction indicated by the letter X is the first direction.

[0199] The first direction X is the direction in which the plurality of first battery cells 21 and the plurality of second battery cells 22 are placed side by side. The plurality of first battery cells 21 and the plurality of second battery cells 22 are staggered along the first direction X. For example, a second battery cell 22 is disposed between two adjacent first battery cells 21 .

[0200] In the above scheme, a plurality of first battery cells 21 and a plurality of second battery cells 22 are staggeredly arranged along the first direction X. When the first battery cell 21 is a lithium iron phosphate battery and the second battery cell 22 is a ternary lithium battery, the lithium iron phosphate battery can have the characteristics of relatively stable chemical properties and good thermal runaway performance, and can improve the spread of thermal runaway of the ternary lithium battery to a certain extent, thereby increasing the cycle life of the battery 100.

[0201] Please refer to Figure 6 According to some embodiments of the present application, the plurality of first battery cells 21 are sequentially arranged along the first direction X, and the plurality of second battery cells 22 are located on both sides of the plurality of first battery cells 21 along the first direction X.

[0202] In the parallel placement direction of the plurality of first battery cells 21 and the plurality of second battery cells 22 , the plurality of second battery cells 22 are located on both sides of the plurality of first battery cells 21 along the first direction X to facilitate the connection of two adjacent first battery cells 21 .

[0203] The plurality of first battery cells 21 are arranged in sequence, and the plurality of second battery cells 22 are distributed on both sides of the plurality of first battery cells 21 in the first direction X. On one side of the plurality of first battery cells 21 in the first direction X, one second battery cell 22 or a plurality of second battery cells 22 may be arranged.

[0204] In the above solution, the plurality of first battery cells 21 are sequentially arranged along the first direction X, and the plurality of second battery cells 22 are arranged on both sides of the plurality of first battery cells 21 along the first direction X, which facilitates the assembly of the battery 100 and reduces the difficulty of assembly.

[0205] According to some embodiments of the present application, the battery 100 further includes a third busbar member, and two adjacent second battery cells 22 are electrically connected via the third busbar member.

[0206] The third current collecting component is a component used to realize electrical connection between two adjacent second battery cells 22. The third current collecting component is a conductive member, and the material of the third current collecting component can be metal, such as iron, copper or alloys thereof.

[0207] In the above solution, the third busbar member is used to realize the electrical connection between two adjacent second battery cells 22 .

[0208] For the convenience of description, the structure of the third conduit component may be the same as that of the second conduit component 50 , and the two components are only arranged at different positions, and the specific structure of the third conduit component is not repeated.

[0209] According to some embodiments of the present application, the battery 100 further includes a third spacer, which is located between the third current collecting member and two adjacent second battery cells 22 along the height direction Z. The structure of the third spacer is the same as that of the second spacer 42, and will not be described in detail in this application.

[0210] The third isolating member, the second isolating member 42 and the first isolating member 41 are integrally formed.

[0211] Please refer to Fig. 9 , Fig. 9 A schematic diagram of the structure of two rows of battery cell groups provided for some embodiments of the present application. According to some embodiments of the present application, the battery 100 includes two rows of battery cell groups 20, each row of battery cell groups 20 includes a plurality of first battery cells 21 and a plurality of second battery cells 22 placed side by side, and the two rows of battery cells are arranged along the second direction Y, and the second direction Y, the first direction X and the height direction Z are perpendicular to each other.

[0212] In the figure, the direction indicated by letter Y is the second direction.

[0213] According to some embodiments of the present application, an electrical device is further provided, comprising a battery 100 as provided in any of the above embodiments.

[0214] The battery 100 is used to provide electrical energy to electrical devices.

[0215] The power-consuming device may be any of the above-mentioned systems or devices using the battery 100 .

[0216] According to some embodiments of this application, please refer to Figure 3 , Figure 4 and Figure 5The embodiment of the present application provides a battery 100, which includes a battery cell group 20, a first collector member 30 and a first isolating member 41. The battery cell group 20 includes a plurality of first battery cells 21 and a plurality of second battery cells 22 placed side by side, and the plurality of first battery cells 21 and the plurality of second battery cells 22 are staggered along the first direction X, and the height of the second battery cells 22 is greater than the height of the first battery cells 21. The first collector member 30 includes a first connecting portion 31, a first reinforcing portion 33 and a second connecting portion 32, the first connecting portion 31 is provided with a first protrusion 311, the second connecting portion 32 is provided with a second protrusion 321, the first connecting portion 31 and the second connecting portion 32 are connected by a first reinforcing portion 33, the first reinforcing portion 33 is bent relative to the first connecting portion 31, and the second connecting portion 32 is bent relative to the first reinforcing portion 33. The first reinforcing portion 33 is arched in a direction away from the second battery cell 22. The first reinforcing portion 33 includes a first connecting section 331, a second connecting section 332 and a third connecting section 333. The first connecting section 331 is connected to the first connecting section 31 and extends in a direction away from the first battery cell 21. The second connecting section 332 is connected to the second connecting section 32 and extends in a direction away from the second battery cell 22. One end of the third connecting section 333 is connected to an end of the first connecting section 331 away from the first connecting section 31, and the other end of the third connecting section 333 is connected to an end of the second connecting section 332 away from the second connecting section 32. The first connecting section 31 and the second connecting section 32 are parallel to the third connecting section 333, respectively. The first conduit member 30 is integrally formed. Along the height direction Z, the first isolating member 41 is located between the first conduit member 30 and the adjacent first battery cell 21 and the second battery cell 22. The first battery cell 21 and the second battery cell 22 both include an electrode terminal 23, the first isolation member 41 is provided with a first avoidance portion 411 and a second avoidance portion 412, the first avoidance portion 411 and the second avoidance portion 412 are both through holes, the first protrusion 311 of the first confluence member 30 extends into the first avoidance portion 411 to be connected to the battery cell of the first battery cell 21, and the second protrusion 321 of the first confluence member 30 extends into the second avoidance portion 412 to be connected to the electrode terminal 23 of the second battery cell 22.

[0217] According to some embodiments of this application, please refer to Figure 5 , Figure 6 and Figure 8 The embodiment of the present application provides a battery 100 , which includes a battery cell group 20 , a first current collecting member 30 , a first isolating member 41 , a second current collecting member 50 and a second isolating member 42 .

[0218] The battery cell group 20 includes a plurality of first battery cells 21 and a plurality of second battery cells 22 placed side by side. The plurality of first battery cells 21 are arranged in sequence along a first direction X, and the plurality of second battery cells 22 are located on both sides of the plurality of first battery cells 21 along the first direction X. The height of the second battery cells 22 is greater than the height of the first battery cells 21.

[0219] The first current collecting member 30 includes a first connection portion 31, a first reinforcement portion 33, and a second connection portion 32. The first connection portion 31 is provided with a first protrusion 311, and the second connection portion 32 is provided with a second protrusion 321. The first connection portion 31 and the second connection portion 32 are connected by the first reinforcement portion 33. The first reinforcement portion 33 is bent relative to the first connection portion 31, and the second connection portion 32 is bent relative to the first reinforcement portion 33. The first reinforcement portion 33 is arched in a direction away from the second battery cell 22. The first reinforcement portion 33 includes a first connection segment 331, a second connection segment 332, and a third connection segment 333. The first connection segment 331 is connected to the first connection portion 31 and extends in a direction away from the first battery cell 21. The second connection segment 332 is connected to the second connection portion 32 and extends in a direction away from the second battery cell 22. One end of the third connection segment 333 is connected to one end of the first connection segment 331 away from the first connection portion 31, and the other end of the third connection segment 333 is connected to one end of the second connection segment 332 away from the second connection portion 32. The first connection portion 31 and the second connection portion 32 are parallel to the third connection section 333, respectively. The first collector member 30 is integrally formed. Along the height direction Z, the first isolating member 41 is located between the first collector member 30 and the adjacent first battery cell 21 and the second battery cell 22. The first battery cell 21 and the second battery cell 22 both include an electrode terminal 23, and the first isolating member 41 is provided with a first avoidance portion 411 and a second avoidance portion 412, and the first avoidance portion 411 and the second avoidance portion 412 are both through holes, and the first protrusion 311 of the first collector member 30 extends into the first avoidance portion 411 to connect with the battery cell of the first battery cell 21, and the second protrusion 321 of the first collector member 30 extends into the second avoidance portion 412 to connect with the electrode terminal 23 of the second battery cell 22. The two adjacent first battery cells 21 are electrically connected through the second collector member 50.

[0220] The second collector member 50 includes two third connection parts 51, which are electrically connected to the two first battery cells 21, respectively, and the heights of the two third connection parts 51 are the same. The second collector member 50 also includes a second reinforcement part 52, which connects the two third connection parts 51, and the second reinforcement part 52 is arched in the direction away from the first battery cell 21. Along the height direction Z, the second separator 42 is located between the second collector member 50 and the two adjacent first battery cells 21. The second separator 42 is provided with two third avoidance parts 421, which are through holes. The electrode terminals 23 of the two adjacent first battery cells 21 correspond to the two third avoidance parts 421 one by one. The third connection part 51 is provided with a third protrusion 511, and the third part of the second collector member 50 extends into the corresponding third avoidance part 421 to connect with the electrode terminal 23 of the first battery cell 21. The first separator 41 and the second separator 42 are integrally formed.

[0221] According to the battery 100 of the embodiment of the present application, the first battery cell 21 can be a ternary lithium battery with a higher energy density, and the second battery cell 22 can be a lithium iron phosphate battery with a higher cycle life. The adjacent first battery cell 21 and the second battery cell 22 are connected by the first busbar component 30 to facilitate the electrical connection between the first battery cell 21 and the second battery cell 22, so that the battery 100 includes both a ternary lithium battery and a lithium iron phosphate battery, which can take into account the characteristics of higher energy density and higher cycle life, and meet the needs of batteries 100 with different performances.

[0222] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: A battery cell group, comprising a plurality of first battery cells and a plurality of second battery cells placed side by side, wherein the height of the second battery cells is greater than the height of the first battery cells; A first busbar member, the first battery cells and the second battery cells adjacent to each other are electrically connected by the first busbar member.

2. The battery according to claim 1, characterized in that The first current collecting member includes a first connection portion and a second connection portion connected to each other, the first connection portion is electrically connected to the first battery cell, the second connection portion is electrically connected to the second battery cell, and the second connection portion is higher than the first connection portion in a height direction.

3. The battery according to claim 2, characterized in that The first collector member further includes a first reinforcement portion, and the first connection portion and the second connection portion are connected via the first reinforcement portion; The first reinforcing portion is bent relative to the first connecting portion, and / or the second connecting portion is bent relative to the first reinforcing portion.

4. The battery according to claim 3, characterized in that The first reinforcement portion is arched in a direction away from the second battery cell.

5. The battery according to claim 4, characterized in that The first reinforcement portion includes a first connecting section, a second connecting section and a third connecting section, the first connecting section is connected to the first connecting section and extends in a direction away from the first battery cell, the second connecting section is connected to the second connecting section and extends in a direction away from the second battery cell, one end of the third connecting section is connected to an end of the first connecting section away from the first connecting section, and the other end of the third connecting section is connected to an end of the second connecting section away from the second connecting section.

6. The battery according to claim 5, characterized in that The first connecting portion and the second connecting portion are respectively parallel to the third connecting section.

7. The battery according to any one of claims 2 to 6, characterized in that: The first collecting component is integrally formed.

8. The battery according to claim 1, characterized in that The first current collecting member includes a plurality of conductive sheets, and the plurality of conductive sheets are stacked.

9. The battery according to claim 1, characterized in that The battery further includes a first spacer located between the first busbar member and the adjacent first and second battery cells in a height direction.

10. The battery according to claim 9, characterized in that The first battery cell and the second battery cell each include an electrode terminal, the first insulating member is provided with a first avoidance portion and a second avoidance portion, the electrode terminal of the first battery cell and / or a portion of the first collector component extend into the first avoidance portion to be connected to each other, and the electrode terminal of the second battery cell and / or a portion of the first collector component extend into the second avoidance portion to be connected to each other.

11. The battery according to claim 10, characterized in that The first avoidance portion and the second avoidance portion are both through holes, and the first conduit component is provided with a first protrusion and a second protrusion, the first protrusion is configured to extend into the corresponding through hole and connect with the electrode terminal of the first battery cell, and the second protrusion is configured to extend into the corresponding through hole and connect with the electrode terminal of the second battery cell.

12. The battery according to claim 9, characterized in that The first isolation member includes a bent portion, and the bent portion is located between the adjacent first battery cells and the second battery cells.

13. The battery according to claim 1, characterized in that The battery also includes: A second current collecting member, two adjacent first battery cells are electrically connected through the second current collecting member.

14. The battery according to claim 13, characterized in that The second current collecting member includes two third connecting portions, the two third connecting portions are electrically connected to the two first battery cells respectively, and the two third connecting portions have the same height.

15. The battery according to claim 14, characterized in that The second current collecting member further includes a second reinforcing portion, the second reinforcing portion connecting the two third connecting portions, and the second reinforcing portion arching in a direction away from the first battery cell.

16. The battery according to claim 13, characterized in that The battery further includes a second spacer, and along a height direction, the second spacer is located between the second current collecting member and two adjacent first battery cells.

17. The battery according to claim 16, characterized in that Two adjacent first battery cells each include an electrode terminal, and the second insulating member is provided with two third avoidance portions. The electrode terminals of the two adjacent first battery cells correspond one-to-one to the two third avoidance portions, and the electrode terminals of the first battery cells and / or portions of the second collector components extend into the corresponding third avoidance portions to be connected to each other.

18. The battery according to claim 17, characterized in that The two third avoidance portions are both through holes, and the second current collecting member is provided with two third protrusions, and the two third protrusions are configured to extend into the corresponding through holes respectively and be connected to the electrode terminals of two adjacent first battery cells.

19. The battery according to claim 13, characterized in that The battery further includes a first separator and a second separator. In the height direction, the first separator is located between the first current collecting member and the adjacent first battery cells and the second battery cells. The second separator is located between the second current collecting member and two adjacent first battery cells.

20. The battery according to claim 19, characterized in that The first isolating member and the second isolating member are integrally formed.

21. The battery according to claim 1, characterized in that The plurality of first battery cells and the plurality of second battery cells are staggered along a first direction.

22. The battery according to claim 1, characterized in that The plurality of first battery cells are sequentially arranged along a first direction, and the plurality of second battery cells are located at both sides of the plurality of first battery cells along the first direction.

23. An electrical equipment, characterized in that: Comprising a battery as claimed in any one of claims 1 to 22.

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