Battery and electric device

Abstract

A battery and an electric device. A battery (1100) comprises a box body (10), insulating members (30), and at least one battery cell (20). The box body (10) comprises first side beams (121) and second side beams (122), and the first side beams (121) and the second side beams (122) are connected and define an accommodating space (101). The at least one battery cell (20) is located in the accommodating space (101), battery cells adjacent to the first side beams (121) are first battery cells (201), the maximum area surface of each first battery cell (201) is a first surface (21), and the first surface (21) of the first battery cell (201) faces the corresponding first side beam (121). The insulating members (30) are located in the accommodating space (101), and each insulating member (30) is provided between the first battery cells (201) and the corresponding first side beam (121), so that when the first side beam (121) is impacted, the first surfaces (21) of the first battery cells (201) bear impact, reducing the impact deformation of the first battery cells (201), reducing the short-circuit risk of the first battery cells (201), thereby improving the use reliability of the battery (1100).

Description

Batteries and electrical devices 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 crucial to the sustainable development of the automotive industry. Against this backdrop, electric vehicles, due to their energy-saving and environmentally friendly characteristics, have become a core component of the industry's sustainable development. However, battery technology is a key factor influencing the development of electric vehicles.

[0003] During the actual use of electric vehicles, the battery may be hit by a collision. After the battery is hit by a collision, the battery cells inside the battery are squeezed and deformed, which is prone to short circuit, seriously affecting the reliability of the battery.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art.

[0005] Application Contents

[0006] The purpose of the embodiments of the present application is to provide a battery and an electrical device that can improve the reliability of battery use.

[0007] The technical solution adopted in the embodiment of this application is:

[0008] In a first aspect, a battery is provided, which includes a box body, an insulating member and at least one battery cell, the box body includes a first side beam and a second side beam, the first side beam and the second side beam are connected and enclosed to form a receiving space; at least one battery cell is located in the receiving space, the battery cell adjacent to the first side beam is the first battery cell, the surface with the largest area of ​​the first battery cell is the first surface, and the first surface of the first battery cell is arranged to face the first side beam; the insulating member is located in the receiving space, and the insulating member is provided between the first battery cell and the first side beam.

[0009] The battery of the embodiment of the present application comprises a box body including a first side beam and a second side beam, which are connected and enclosed to form a receiving space, wherein the battery cell and the insulating member are both located in the receiving space, the battery cell adjacent to the first side beam is the first battery cell, the surface of the first battery cell with the largest area is the first surface, the first surface of the first battery cell is arranged to face the first side beam, and an insulating member is provided between the first battery cell and the first side beam, so that when the first side beam is impacted, the first surface of the first battery cell bears the impact, because the first surface of the first battery cell allows a larger amount of intrusion than other surfaces of the first battery cell, and the risk of short circuit in the first battery cell is reduced, thereby improving the reliability of the battery; in addition, during the impact, because the insulating member is located between the first battery cell and the insulating member, the insulating member can also withstand a certain impact force, thereby protecting the first battery cell, reducing the impact deformation of the first battery cell, reducing the risk of short circuit in the first battery cell, and further improving the reliability of the battery.

[0010] In some embodiments, the length of the first side beam is greater than the length of the second side beam.

[0011] By adopting the technical solution of this embodiment, the length of the first side beam is greater than that of the second side beam, the first surface of the first battery cell faces the first side beam, and an insulating member is provided between the first side beam and the first battery cell. This can effectively reduce the impact deformation of the first battery cell, reduce the short circuit risk of the first battery cell, and improve the reliability of the battery.

[0012] In some embodiments, one side of the insulating member abuts against the first battery cell, and / or the other side of the insulating member abuts against the first side beam.

[0013] By adopting the technical solution of this embodiment, the insulating part is offset against the first battery cell and / or the first side beam, so that the insulating part can withstand greater impact force, reduce the risk of deformation and short circuit of the first battery cell, and improve the reliability of battery use. In addition, it can also save space inside the battery and increase the volume energy density of the battery.

[0014] In some embodiments, the insulating member is fixedly connected to the first battery cell and the first side beam.

[0015] By adopting the technical solution of this embodiment, the first battery cell and the first side beam are fixedly connected by the insulating member. The insulating member can improve the connection strength between the first battery cell and the first side beam, thereby facilitating the improvement of the structural strength and rigidity of the battery, and further improving the reliability of the battery.

[0016] In some embodiments, one side of the insulating member is bonded to the first battery cell; and / or the other side of the insulating member is bonded to the first side beam.

[0017] By adopting the technical solution of this embodiment, the insulating member is connected by bonding, which makes the bonding operation simple and helps to improve the production efficiency of the battery.

[0018] In some embodiments, the insulating member is an elastic insulating member or a hard insulating member; and / or, the insulating member is a thermal insulation member.

[0019] By adopting the technical solution of this embodiment, when the insulating member is an elastic insulating member, the insulating member can also play a buffering role. On the one hand, it can buffer the expansion deformation of the first battery cell. On the other hand, it can also buffer the impact, which can reduce the impact deformation of the first battery cell, which is beneficial to improving the reliability of the battery. When the insulating member is a hard insulating member, the hard insulating member can protect the first battery cell, reduce the impact deformation of the first battery cell, and improve the reliability of the battery. When the insulating member is a heat-insulating insulating member, the insulating member can play a heat-insulating role, thereby reducing the impact of the low temperature environment on the first battery cell, and improving the thermal insulation performance and overall charge and discharge performance of the battery.

[0020] In some embodiments, the insulating member includes multiple layers, which are stacked along a first direction, and the first direction is the distribution direction of the battery cells and the first side beam; wherein the multiple layers include at least one of an elastic insulating layer and a hard insulating layer; and / or the multiple layers include a thermal insulation layer.

[0021] By adopting the technical solution of this embodiment, the insulating part can adopt a multi-layer structure, the structural strength of the insulating part is good, and the materials of each layer can be flexibly set according to actual needs, so that the insulating part has different properties, thereby better improving the reliability and performance of the battery.

[0022] In some embodiments, a surface of the insulating member facing the first side beam is provided with a protrusion.

[0023] By adopting the technical solution of this embodiment, the protrusion is set to form a deformation space between the insulating part and the first side beam for the first side beam to deform due to impact, so as to buffer the impact of the first side beam on the insulating part, thereby reducing the risk of impact deformation of the first battery cell, reducing the risk of short circuit, and improving the reliability of the battery.

[0024] In some embodiments, there are multiple protrusions, and the multiple protrusions are arranged at intervals along the height direction of the first battery cell.

[0025] By adopting the technical solution of this embodiment, multiple protrusions can form multi-point buffers for the impact of the first side beam on the insulating part along the height direction of the first battery cell, thereby better reducing the impact force of the first battery cell, reducing the risk of impact deformation of the first battery cell, reducing the risk of short circuit, and improving the reliability of battery use.

[0026] In some embodiments, there are a plurality of first battery cells, and the plurality of first battery cells are arranged along a second direction parallel to the first surface; at least two first battery cells are connected to the insulating member.

[0027] By adopting the technical solution of this embodiment, the insulating member can connect multiple first battery cells together to form a whole, which can improve the structural strength of the multiple first battery cells, help reduce the impact deformation of the first battery cells, and improve the reliability of the battery.

[0028] In some embodiments, the projection of the insulating member along the first direction at least partially overlaps the projection of the first surface of the at least two first battery cells along the first direction, and the first direction is perpendicular to the first surface.

[0029] By adopting the technical solution of this embodiment, the insulating member can also provide protection for the multiple first battery cells, which is also beneficial to reducing the short circuit risk of the first battery cells and improving the reliability of the battery.

[0030] In some embodiments, the first side beam is provided with a mounting structure for mounting a battery.

[0031] By adopting the technical solution of this embodiment, the structural strength of the first side beam provided with the mounting structure is good, so that the first side beam provided with the mounting structure can better protect the first battery cell, effectively reduce the impact deformation of the first battery cell, reduce the short circuit risk of the first battery cell, and improve the reliability of the battery.

[0032] In some embodiments, there are two first side beams, the two first side beams are arranged opposite to each other, the battery cell is located between the two first side beams, an insulating member is arranged between one of the first side beams and the corresponding first battery cell, and an insulating member is arranged between the other first side beam and the corresponding first battery cell.

[0033] By adopting the technical solution of this embodiment, the first surface of the first battery cell and the insulating member jointly bear the impact when the corresponding first side beam hits the opposite sides of the battery. This can reduce the impact deformation of the first battery cell, effectively reduce the short circuit risk of the first battery cell, and is conducive to improving the reliability of the battery.

[0034] In some embodiments, there are multiple first battery cells, the multiple battery cells include first type battery cells and second type battery cells, at least the first battery cell is the second type battery cell, and the energy density of the second type battery cell is greater than the energy density of the first type battery cell.

[0035] By adopting the technical solution of this embodiment, the first battery cell is set as a second-type battery cell, and the second-type battery cell has a higher energy density, so that the second-type battery cell has better charging and discharging performance at low temperatures, which can reduce the impact of the low-temperature environment on the first battery cell, effectively improve the battery's thermal insulation performance and charging and discharging performance at low temperatures, improve the temperature difference, and also achieve a good balance between battery cost and capacity.

[0036] In some embodiments, the first type of battery cells include sodium ion battery cells, and the second type of battery cells include lithium ion battery cells; or, the first type of battery cells include lithium iron phosphate battery cells, and the second type of battery cells include ternary battery cells.

[0037] By adopting the technical solution of this embodiment and selecting the above-mentioned first type battery cells and second type battery cells, the energy density of the selected second type battery cells can be better made greater than the energy density of the first type battery cells, so as to improve the overall thermal insulation performance, charge and discharge performance and energy density of the battery at low temperatures.

[0038] In some embodiments, the box body further includes a reinforcing beam, which is located in the receiving space and divides the receiving space into a first receiving cavity and a second receiving cavity, and the insulating member and the battery cell are located in the first receiving cavity.

[0039] By adopting the technical solution of this embodiment, the provision of the reinforcing beam can increase the structural strength of the box body, which is beneficial to improving the reliability of the battery; the first receiving cavity is used to accommodate the battery cell, and the second receiving cavity can accommodate other components of the battery. The battery cell and other components can be separated by the reinforcing beam, which can reduce the risk of damage to the battery cell and short circuit caused by interference between other components and the battery cell, and is more conducive to improving the reliability of the battery; the box body adopts a structural form of a first side beam, a reinforcing beam and a second side beam, which has a simple structure and good structural reliability. The horizontal and vertical beams provided inside the box body can also be eliminated to provide more space for installing the battery cell, which is beneficial to improving the volume energy density of the battery.

[0040] In some embodiments, the battery further includes a control device for controlling the battery cell, and the control device is located in the second receiving cavity.

[0041] By adopting the technical solution of this embodiment, the control device is the second receiving cavity, and the battery cell and the control device are separated and isolated by the reinforcing beam, which can reduce the mutual influence between the battery cell and the control device and is conducive to improving the reliability of the battery.

[0042] In some embodiments, the box body further includes a sealing plate, which is located on one side of the first side beam and closes an opening on one side of the receiving space.

[0043] By adopting the technical solution of this embodiment, the sealing plate closes the opening on one side of the receiving space, which can reduce the impact of external components on the battery cells and insulating components, and is conducive to improving the reliability of the battery.

[0044] In some embodiments, the sealing plate is a heat exchange plate for exchanging heat with the battery cells.

[0045] By adopting the technical solution of this embodiment, the sealing plate is a heat exchange plate, and the heat exchange plate exchanges heat with the battery cell, which is conducive to controlling the problems of the battery cell within an appropriate problem range, thereby improving the reliability and charge and discharge performance of the battery cell, and improving the reliability and charge and discharge performance of the battery.

[0046] In some embodiments, the box body further includes a box cover, which is located on the other side of the first side beam and closes the opening on the other side of the receiving space.

[0047] By adopting the technical solution of this embodiment, the box cover and the sealing plate can seal the openings on opposite sides of the receiving space, thereby improving the sealing performance of the box body and facilitating the improvement of the reliability and service life of the battery.

[0048] In a second aspect, an electrical device is provided, comprising the battery as described in the above embodiment.

[0049] The electrical device of the embodiment of the present application adopts the above-mentioned battery, and the battery monomer has good reliability in use, thereby improving the reliability and service life of the battery.

[0050] In some embodiments, the electric device is a vehicle, and the first side beam is located on a side of the first battery cell facing a door of the vehicle.

[0051] By adopting the technical solution of this embodiment, when the vehicle is hit by a side pole or is squeezed from the side, the first side beam of the battery is mainly impacted; during the collision, the first surface of the first battery cell and the insulating member bear the impact at the same time. Since the first surface allows much more intrusion than other surfaces of the first battery cell, the risk of short circuit after the first battery cell is squeezed and deformed will be relatively low, which can greatly improve the safety of the battery in side pole collision and side squeeze conditions; in addition, during the collision, since the insulating member is located between the first battery cell and the insulating member, the insulating member can also withstand a certain impact force. The insulating member can protect the first battery cell, reduce the impact force on the battery cell, reduce the risk of short circuit of the first battery cell, and further improve the safety of the battery in side pole collision and side squeeze conditions.

[0052] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0054] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0055] FIG2 is a schematic diagram of the exploded structure of a battery provided in some embodiments of the present application.

[0056] FIG3 is a schematic structural diagram of a battery cell provided in some embodiments of the present application.

[0057] FIG4 is a schematic structural diagram of the battery shown in FIG2 from a perspective behind a hidden box cover.

[0058] FIG5 is a schematic structural diagram of the battery shown in FIG2 from another perspective behind the hidden box cover.

[0059] FIG6 is a partial enlarged view of point A in FIG5 .

[0060] FIG7 is a schematic structural diagram of the battery shown in FIG2 after being hidden in the box.

[0061] FIG8 is a schematic structural diagram of the insulating member shown in FIG7 .

[0062] FIG9 is a schematic diagram of the structure of the battery hidden behind the box provided in some embodiments of the present application.

[0063] FIG10 is a schematic diagram of the exploded structure of the insulating member shown in FIG9 .

[0064] FIG11 is a schematic diagram of the structure of batteries hidden behind a box provided in other embodiments of the present application.

[0065] FIG12 is a schematic structural diagram of the insulating member shown in FIG11 .

[0066] Among them, the figure marks in the figure are: 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 10, box body; 11, box cover; 12, lower box body; 121, first side beam; 1211, mounting structure; 122, second side beam; 123, reinforcement beam; 124, sealing plate; 125, heat exchange plate; 101, receiving space; 1011, first receiving cavity; 1012, second receiving cavity; 20, battery cell; 21, first surface; 22, first end face; 23, first side face; 24, second side face; 201, first battery cell; 202, first type battery cell; 203, second type battery cell; 30, insulating part; 31, layer; 32, protrusion; 40, control device; 50, confluence component. DETAILED DESCRIPTION

[0067] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0069] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0070] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least some embodiments of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0071] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0072] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0073] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0074] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0075] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0076] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery generally includes a housing that encloses one or more battery cells. The housing can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0077] In a battery, when there are multiple battery cells, they can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell structure is housed within a housing. Alternatively, a battery can be constructed by first connecting multiple battery cells in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within a housing. The battery may also include other structures, such as a busbar assembly for electrically connecting multiple battery cells.

[0078] The battery cell in the embodiment of the present application includes an electrode assembly and a housing, and the electrode assembly is installed in the housing to protect the electrode assembly.

[0079] The electrode assembly is also called a battery cell. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The part of the positive electrode collector that is not coated with the positive electrode active material layer protrudes from the part that is coated with the positive electrode active material layer. The part that is not coated with the positive electrode active material layer serves as the positive electrode tab, or a metal conductor is welded on the positive electrode collector and led out to serve as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is applied to the surface of the negative current collector. The portion of the negative current collector not coated with the negative active material layer protrudes from the portion coated with the negative active material layer. The portion not coated with the negative active material layer serves as the negative electrode tab, or a metal conductor is welded to the negative current collector and extended to serve as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon, silicon, or other materials. To ensure that high currents can pass without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. It is understood that the electrode assembly can have one positive electrode tab and one negative electrode tab. In other words, the electrode assembly is provided with two sets of tabs, each containing at least one tab, with one set being the positive electrode tab and the other being the negative electrode tab.

[0080] The electrode assembly can be a wound structure or a laminated structure. The embodiments of the present application are not limited to this. The wound structure is mostly to weld the tabs to the current collector, and then arrange them in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm; and then form a cylindrical or square battery cell by winding. The laminated structure is mostly to lead out the tabs on the current collector, arrange the positive electrode sheet, negative electrode sheet and diaphragm in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm, and stack them layer by layer to form a laminated battery cell; wherein, the diaphragm can be cut and directly laminated with the diaphragm sheet, or the diaphragm is not cut, but laminated in a Z-shaped fold. The material of the diaphragm can be PP (Polypropylene, polypropylene) or PE (Polyethylene, polyethylene), etc. The diaphragm is an insulating film arranged between the positive electrode sheet and the negative electrode sheet. Its main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from passing freely, to prevent short circuits to a certain extent, and to allow the ions in the electrolyte to pass freely between the positive and negative electrodes to form a loop between the positive and negative electrodes. The positive electrode sheet and the negative electrode sheet are collectively referred to as the electrode sheet. The positive electrode tab and the negative electrode tab are collectively referred to as the tab.

[0081] The outer shell refers to the housing structure with a space inside to accommodate and protect the electrode assembly. The outer shell can be made of a material with a certain degree of hardness and strength. This prevents deformation during compression and collision, giving the battery cells greater structural strength and improved reliability. The outer shell can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0082] The outer casing of a battery cell is equipped with electrode terminals. Electrode terminals are conductive components attached to the outer casing. They connect to the tabs of the electrode assembly to output power from the battery cell or charge the battery cell. A battery cell generally has two electrode terminals, one connected to the positive and negative tabs of the electrode assembly. The electrode terminal connected to the positive tab is the positive electrode terminal, and the electrode terminal connected to the negative tab is the negative electrode terminal. The electrode assembly and electrode terminals are connected to form a battery cell.

[0083] When a battery cell is charged, the current converts electrical energy into chemical energy through chemical reactions between the electrolyte and electrodes, which is stored in the cell. During discharge, the chemical energy is converted back into electrical energy and released. This energy conversion process is accompanied by energy loss and heat generation. If the heat cannot be effectively dissipated due to poor heat dissipation within the battery cell, the cell can overheat. Battery cells have a certain internal resistance, and when current flows through this resistance, it generates resistance losses, causing internal heat generation. When the current is too high or the internal resistance is too high, the internal heat generation intensifies, leading to overheating. If a battery cell exceeds its maximum design voltage during charging, or if the voltage drops too low during discharge, the cell can overvoltage or overdischarge. Overcharging or overdischarging can trigger runaway chemical reactions within the cell, generating excessive heat and causing overheating. Furthermore, defects in the battery cell design or manufacturing process, such as improper material selection or poor cell assembly, can lead to poor internal heat dissipation or uneven current distribution, increasing the risk of overheating or overvoltage. Therefore, the battery cells may overheat or overvoltage during charging or use.

[0084] Battery cells typically contain a certain amount of gas. When a battery cell is charged or discharged, the electrolyte solution undergoes gas generation or absorption reactions. The generation of these gases causes the gas pressure inside the battery cell to increase, causing the battery cell to swell and deform. During the charging or discharging process, the positive and negative electrode materials undergo chemical reactions to form new compounds. These chemical reactions are accompanied by volume changes, which cause the volume of the materials inside the battery cell to change, causing the battery to swell and deform. When a battery cell is overcharged or over-discharged, the chemical reactions inside the battery cell can become uncontrolled, generating excessive gas or causing structural damage to the electrode materials, which in turn causes the battery cell to swell and deform. Charging or discharging a battery cell in a high-temperature environment accelerates the internal chemical reactions, increasing gas generation and volume changes. High temperatures also cause the materials inside the battery cell to expand, also causing the battery cell to swell and deform.

[0085] To reduce the risk of explosion or fire caused by overheating or overpressure during charging or use, battery cell casings are often equipped with pressure relief mechanisms such as explosion-proof valves and explosion-proof discs. These release internal gas or liquid when the temperature or pressure of a battery cell exceeds a safety threshold, thereby reducing the pressure inside the cell and lowering the risk of explosion. This improves the safety of the battery cell and reduces potential safety risks.

[0086] Energy conservation and emission reduction are crucial to the sustainable development of the automotive industry. Against this backdrop, electric vehicles, due to their energy-saving and environmentally friendly characteristics, have become a core component of the industry's sustainable development. However, battery technology is a key factor influencing the development of electric vehicles.

[0087] A battery typically includes a housing and battery cells housed within the housing. During actual use of an electric vehicle, the battery may be subject to collisions. In particular, when the side beams of the housing are impacted by a collision, the battery cells adjacent to the impacted side beams are subject to the greatest impact force, suffer the most severe extrusion deformation, and are most prone to short circuits, severely impacting the reliability of the battery.

[0088] Based on this, in the battery provided in the embodiment of the present application, the battery cell adjacent to the first side beam is the first battery cell, the surface with the largest area of ​​the first battery cell is the first surface, the first surface of the first battery cell is arranged to face the first side beam, and an insulating member is provided between the first battery cell and the first side beam. Then, during the process when the first side beam is impacted, the force is applied to the first surface of the first battery cell, and the first surface of the first battery cell allows a larger amount of intrusion than the surface of the first battery cell, and the risk of short circuit in the first battery cell is small, which is beneficial to improving the reliability of the battery. In addition, during the impact, since the insulating member is located between the first battery cell and the insulating member, the insulating member can also withstand a certain impact force. The insulating member can protect the first battery cell, reduce the impact deformation of the battery cell, reduce the risk of short circuit in the first battery cell, and further improve the reliability of the battery.

[0089] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0090] Electrical devices may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, electric tools, and the like. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices. Batteries may also be energy storage devices. Energy storage devices include energy storage containers, energy storage cabinets, and the like.

[0091] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0092] Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application.

[0093] The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1100 is provided inside the vehicle 1000. The battery 1100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 may be used to power the vehicle 1000. For example, the battery 1100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery 1100 to power the motor 1300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0094] In some embodiments of the present application, the battery 1100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0095] In order to meet different power requirements, the battery 1100 may include a plurality of battery cells 20, wherein the plurality of battery cells 20 may be connected in series, in parallel, or in a hybrid connection, where the hybrid connection refers to a mixture of series and parallel connections. The battery 1100 may also be referred to as a battery pack. Optionally, the plurality of battery cells 20 may first be connected in series, in parallel, or in a hybrid connection to form a battery module, and the plurality of battery modules may then be connected in series, in parallel, or in a hybrid connection to form the battery 1100. In other words, the plurality of battery cells 20 may directly form the battery 1100, or they may first form a battery module, which may then form the battery 1100.

[0096] The battery 1100 further includes a case 10 for encapsulating one or more battery cells 20. The case 10 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 20 to a certain extent.

[0097] Refer to Figure 2, which is a schematic diagram of the exploded structure of the battery 1100 provided in some embodiments of the present application. The battery 1100 has a height direction, a length direction, and a width direction. The height direction of the battery 1100 can be referred to as the Z direction, the width direction of the battery 1100 can be referred to as the X direction, and the length direction of the battery 1100 can be referred to as the Y direction. The length of the battery 1100 can be larger or smaller than the width. The box body 10 defines the external structure of the battery 1100. The height direction of the box body 10 is the height direction of the battery 1100, the length direction of the box body 10 is the length direction of the battery 1100, and the width direction of the box body 10 is the width direction of the battery 1100.

[0098] For ease of understanding and description, the embodiments provided in this application are described only with respect to rectangular battery cells 20. It should be understood that the embodiments provided in this application are also applicable to cylindrical battery cells 20 or soft-pack battery cells 20, and the embodiments of this application are not limited to this.

[0099] Please refer to FIG. 3 , which is a schematic structural diagram of a battery cell 20 provided in some embodiments of the present application.

[0100] The battery cell 20 also has a height, a length, and a width. The height of the battery cell 20 can be referred to as the Z1 direction, the width of the battery cell 20 can be referred to as the X1 direction, and the length of the battery cell 20 can be referred to as the Y1 direction. The battery cell 20 includes two first end faces 22 along its height. The distance between the two first end faces 22 defines the height of the battery cell 20. The battery cell 20 includes two first side faces 23 along its thickness and two second side faces 24 along its length. The distance between the two first side faces 23 defines the width of the battery cell 20, and the distance between the two second side faces 24 defines the length of the battery cell 20. The area of ​​the two first end faces 22 is determined by the length and width of the battery cell 20, the area of ​​the first side face 23 is determined by the height and length of the battery cell 20, and the area of ​​the second side face 24 is determined by the height and width of the battery cell 20. For a flat battery cell 20, such as a square, its width is smaller than its length and height, and its first side face 23 has the largest area. Therefore, the first side face 23 is also called the large side.

[0101] Please refer to Figures 4 to 6. Figure 4 is a schematic diagram of the structure of the battery 1100 shown in Figure 2 hidden behind the box cover 11 from one perspective. Figure 5 is a schematic diagram of the structure of the battery 1100 shown in Figure 2 hidden behind the box cover 11 from another perspective. Figure 6 is a partial enlarged view of point A in Figure 5.

[0102] In some embodiments of the present application, a battery 1100 is provided, which includes a box body 10, an insulating member 30 and at least one battery cell 20, the box body 10 includes a first side beam 121 and a second side beam 122, the first side beam 121 and the second side beam 122 are connected and enclosed to form a receiving space 101; at least one battery cell 20 is located in the receiving space 101, the battery cell 20 adjacent to the first side beam 121 is the first battery cell 201, the surface with the largest area of ​​the first battery cell 201 is the first surface 21, and the first surface 21 of the first battery cell 201 is arranged facing the first side beam 121; the insulating member 30 is located in the receiving space 101, and the insulating member 30 is provided between the first battery cell 201 and the first side beam 121.

[0103] The housing 10 may be a shell structure having a receiving space 101. The battery cells 20 and the insulating member 30 are received in the receiving space 101. The housing 10 protects the battery cells 20 and the insulating member 30. The housing 10 may have various structures. The receiving space 101 may be the space within the housing 10 for accommodating the battery cells 20 and the insulating member 30.

[0104] As an example, the box body 10 may include a lower box body 12 and a box cover 11. The lower box body 12 and the box cover 11 cover each other, and together define a receiving space 101. The lower box body 12 may be a hollow structure with one end open, and the box cover 11 may be a plate-like structure. The box cover 11 covers the open side of the lower box body 12, so that the lower box body 12 and the box cover 11 together define the receiving space 101. The lower box body 12 and the box cover 11 may also be hollow structures with one end open, with the open side of the lower box body 12 covering the open side of the box cover 11. Of course, the box body 10 formed by the lower box body 12 and the box cover 11 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0105] In some examples, the box body 10 includes a first side beam 121 and a second side beam 122, which are connected and enclose the receiving space 101. That is, the first side beam 121 and the second side beam 122 are connected to form the peripheral side wall of the receiving space 101. The side wall on one side of the receiving space 101 is a side beam, wherein the side beam opposite the first surface 21 of the first battery cell 201 is the first side beam 121, and the side beam opposite other surfaces of the first battery cell 201 is the second side beam 122. When the lower box body 12 is a hollow structure with one end open and the box cover 11 is a plate-like structure, the side wall on one side of the lower box body 12 is a side beam, wherein the side beam opposite the first surface 21 of the first battery cell 201 is the first side beam 121, and the side beam opposite other surfaces of the first battery cell 201 is the second side beam 122. When both the lower box body 12 and the box cover 11 are hollow structures with one side open, the sidewalls of the lower box body 12 and the corresponding sidewalls of the box cover 11 together form side beams. The side beams facing the first surface 21 of the first battery cell 201 are first side beams 121, while the side beams facing other surfaces of the first battery cell 201 are second side beams 122. The first and second side beams 121, 122 can be formed of profiles, sheet metal, die-cast structures, etc. The number of first side beams 121 can be one, two, or more than three, and the number of second side beams 122 can be one, two, three, four, or more than five, depending on the shape of the box body 10.

[0106] As an example, in combination with Figures 2, 4 and 5, the number of first side beams 121 is two, the number of second side beams 122 is two, the two first side beams 121 and the two second side beams 122 are connected end to end to form a rectangular frame structure, the internal space of the rectangular frame structure forms a receiving space 101, the two first side beams 121 are located on opposite sides of the box body 10 along the width direction of the battery 1100 and extend along the length direction of the battery 1100, and the two second side beams 122 are located on opposite sides of the box body 10 along the length direction of the battery 1100 and extend along the width direction of the battery 1100.

[0107] The first battery cell 201 may refer to the battery cell 20 in the battery 1100 that is adjacent to the first side beam 121, that is, the battery cell 20 in the battery 1100 that is closest to the first side beam 121. When the battery 1100 includes a single battery cell 20, this battery cell 20 is the first battery cell 201. When the battery 1100 includes multiple battery cells 20, the battery cell 20 that is closest to the first side beam 121 is the first battery cell 201; the number of first battery cells 201 may be one or more.

[0108] As shown in Figures 2, 4 and 5, when the first side beam 121 extends along the length direction of the battery 1100, multiple battery cells 20 can form a column of battery cells 20, and the multiple battery cells 20 in the column of battery cells 20 are arranged along the length direction of the battery 1100, and all the battery cells 20 in the column of battery cells 20 are first battery cells 201; the multiple battery cells 20 in the column of battery cells 20 are arranged along the width direction of the battery 1100, and the battery cells 20 located at both ends of the column of battery cells 20 are first battery cells 201; multiple battery cells 20 can form multiple columns of battery cells 20, and the multiple columns of battery cells 20 are arranged along the width direction of the battery 1100. The multiple battery cells 20 in each column of battery cells 20 are arranged along the length direction of the battery 1100, and the multiple battery cells 20 in two opposite columns of battery cells 20 along the width direction of the battery 1100 are all first battery cells 201.

[0109] The first surface 21 may refer to the largest surface of the first battery cell 201. As an example, the first battery cell 201 may be the battery cell 20 shown in FIG. 3 , and the first surface 21 of the first battery cell 201 may refer to the first side surface 23. The battery cells 20 other than the first battery cell 201 in the battery 1100 may be the battery cell 20 shown in FIG. 3 , or other types of battery cells 20 may be used.

[0110] As shown in Figures 2 and 3 , the height of the first battery cell 201 is parallel to the height of the battery 1100, the width of the first battery cell 201 is parallel to the width of the battery 1100, and the length of the first battery cell 201 is parallel to the length of the battery 1100. This allows the first side surface 23 (first surface 21) of the first battery cell 201 to be disposed opposite the first side beam 121, i.e., the first side surface 23 of the first battery cell 201 is disposed facing the first side beam 121. Of course, in other examples, the first battery cell 201 may be arranged in other ways.

[0111] The insulating member 30 may be a component with insulating properties and may be made of insulating materials such as plastic, rubber, foam, expanded plastic, or composite insulating materials. The insulating member 30 may be plate-shaped and may cover the first surface 21 of the first battery cell 201. The insulating member 30 may have a single-layer structure or a multi-layer structure.

[0112] An insulating member 30 is provided between the first battery cell 201 and the first side beam 121. It is understood that the insulating member 30 is located between the first side beam 121 and the first battery cell 201 to insulate the first side beam 121 from the first battery cell 201, reducing the risk of short circuits in the first battery cell 201 and improving the reliability of the battery 1100. Furthermore, the first surface 21 of the first battery cell 201 is disposed facing the first side beam 121, meaning that the insulating member 30 is located between the first surface 21 of the first battery cell 201 and the first side beam 121. The insulating member 30 may be located between multiple first battery cells 201 and the first side beam 121, or between a single first battery cell 201 and the first side beam 121.

[0113] The battery 1100 of the embodiment of the present application, the box 10 includes a first side beam 121 and a second side beam 122, the first side beam 121 and the second side beam 122 are connected and enclosed to form a receiving space 101, the battery cell 20 and the insulating member 30 are both located in the receiving space 101, the battery cell 20 adjacent to the first side beam 121 is the first battery cell 201, the surface with the largest area of ​​the first battery cell 201 is the first surface 21, the first surface 21 of the first battery cell 201 is arranged facing the first side beam 121, and an insulating member 30 is provided between the first battery cell 201 and the first side beam 121, so that when the first side beam 121 is hit, the first battery cell 20 is used to The first surface 21 of 201 can withstand impact. Since the first surface 21 of the first battery cell 201 allows a larger intrusion amount than other surfaces of the first battery cell 201, and the risk of short circuit in the first battery cell 201 is small, the reliability of the battery 1100 can be improved. In addition, during the impact, since the insulating part 30 is located between the first battery cell 201 and the insulating part 30, the insulating part 30 can also withstand a certain impact force, which plays a protective role for the first battery cell 201, reduces the impact deformation of the first battery cell 201, reduces the risk of short circuit in the first battery cell 201, and further improves the reliability of the battery 1100.

[0114] In some embodiments, as shown in FIG2 , the battery 1100 further includes a busbar 50 , through which multiple battery cells 20 are connected in parallel, in series, or in mixed connection. The busbar 50 may be, but is not limited to, a conductive member such as a copper busbar or an aluminum busbar.

[0115] In some other embodiments of the present application, referring to FIG. 4 and FIG. 5 , the length of the first side beam 121 is greater than the length of the second side beam 122 .

[0116] The length of the first side beam 121 may refer to the distance between two opposite end surfaces of the first side beam 121 along the length direction.

[0117] The length of the second side beam 122 may refer to the distance between two opposite end surfaces of the second side beam 122 along the length direction.

[0118] The length of the first side beam 121 is greater than the length of the second side beam 122. The first side beam 121 may refer to the longer side beam in the box body 10, and the second side beam 122 may refer to the shorter side beam in the box body 10. As an example, when the length of the battery 1100 is greater than the width of the battery 1100, the first side beam 121 may refer to the side beam extending along the length direction of the battery 1100, and the second side beam 122 may refer to the side beam extending along the width direction of the battery 1100.

[0119] Generally, the first side beam 121 is long and deforms greatly upon impact. Compared with the battery cell 20 adjacent to the second side beam 122 , the first battery cell 201 also deforms greatly upon impact and is more susceptible to short circuit risk.

[0120] By adopting the technical solution of this embodiment, the length of the first side beam 121 is greater than the length of the second side beam 122, and the first surface 21 of the first battery cell 201 faces the first side beam 121, and an insulating member 30 is provided between the first side beam 121 and the first battery cell 201, which can better reduce the impact deformation of the first battery cell 201, reduce the short circuit risk of the first battery cell 201, and improve the reliability of the battery 1100.

[0121] In some other embodiments of the present application, as shown in FIG. 6 , one side of the insulating member 30 abuts against the first battery cell 201 , and / or the other side of the insulating member 30 abuts against the first side beam 121 .

[0122] In one possible embodiment, one side of the insulating member 30 abuts the first battery cell 201. It is understood that the side of the insulating member 30 may directly abut the first battery cell 201, or the side of the insulating member 30 may abut the first battery cell 201 via an adhesive (such as structural adhesive). The insulating member 30 is supported by the first battery cell 201, allowing it to withstand greater impact forces, thereby reducing the risk of deformation of the first battery cell 201. The abutment of one side of the insulating member 30 against the first battery cell 201 saves space within the battery 1100, thereby increasing the volumetric energy density of the battery 1100.

[0123] In another possible embodiment, the other side of the insulating member 30 abuts the first side beam 121. It is understood that the sidewall of the insulating member 30 may directly abut the first battery cell 201, or the sidewall of the insulating member 30 may abut the first battery cell 201 via an adhesive (such as structural adhesive). The insulating member 30 is supported by the first side beam 121, allowing it to withstand greater impact forces, thereby reducing the risk of deformation of the first battery cell 201 and improving the reliability of the battery 1100. The abutment of one side of the insulating member 30 against the first side beam 121 saves space within the battery 1100 and helps increase its volumetric energy density.

[0124] In another possible embodiment, one side of the insulating member 30 abuts against the first battery cell 201, and the other side of the insulating member 30 abuts against the first side beam 121; it can be understood that the insulating member 30 is clamped between the first battery cell 201 and the first side beam 121, so that the insulating member 30 can be stably fixed between the first battery cell 201 and the first side beam 121, and the insulating member 30 can withstand greater impact force, which is beneficial to reducing the risk of deformation of the first battery cell 201 and improving the reliability of the battery 1100; the insulating member 30 Being clamped between the first battery cell 201 and the first side beam 121, space inside the battery 1100 can be saved, which is beneficial to improving the volume energy density of the battery 1100; in addition, during the charging and discharging process of the first battery cell 201, the first surface 21 of the first battery cell 201 expands, and the first surface 21 of the first battery cell 201 is offset from the first side beam 121 through the insulating member 30. The first side beam 121 can limit the expansion of the first surface 21 of the first battery cell 201 to improve the charging and discharging performance of the first battery cell 201.

[0125] By adopting the technical solution of this embodiment, the insulating part 30 is offset against the first battery cell 201 and / or the first side beam 121, so that the insulating part 30 can withstand greater impact force, reduce the risk of deformation and short circuit of the first battery cell 201, and improve the reliability of the battery 1100. In addition, it can also save space inside the battery 1100 and improve the volume energy density of the battery 1100.

[0126] In some other embodiments of the present application, the insulating member 30 fixedly connects the first battery cell 201 and the first side beam 121 .

[0127] It can be understood that the insulating member 30 fixedly connects the first battery cell 201 and the first side beam 121 together to form an integral structure; the insulating member 30 can fixedly connect the first battery cell 201 and the first side beam 121 by means of a screw structure, a clamping structure, an adhesive structure, etc.

[0128] By adopting the technical solution of this embodiment, the first battery cell 201 and the first side beam 121 are fixedly connected by the insulating member 30. The insulating member 30 can improve the connection strength between the first battery cell 201 and the first side beam 121, thereby facilitating the improvement of the structural strength and rigidity of the battery 1100, and further improving the reliability of the battery 1100.

[0129] In some other embodiments of the present application, as shown in FIG. 6 , one side of the insulating member 30 is bonded to the first battery cell 201 ; and / or the other side of the insulating member 30 is bonded to the first side beam 121 .

[0130] In one possible embodiment, one side of the insulating member 30 is bonded to the first battery cell 201. It is understood that the side of the insulating member 30 is bonded to the first battery cell 201 via an adhesive. The adhesive may be a structural adhesive, which is an adhesive with high strength, weather resistance, and aging resistance, primarily used to secure and connect various materials to enhance structural stability and integrity. The adhesive may be, but is not limited to, epoxy resin adhesive, silicone rubber, polyurethane adhesive, acrylate adhesive, or polyvinyl acetal adhesive. The adhesive bonding between the insulating member 30 and the first battery cell 201 is simple, facilitating improved production efficiency of the battery 1100.

[0131] In another possible embodiment, the other side of the insulating member 30 is bonded to the first side beam 121; it can be understood that the side of the insulating member 30 is bonded to the first side beam 121 through an adhesive, and the insulating member 30 and the first side beam 121 can be bonded with an adhesive. The connection operation is simple, which is conducive to improving the production efficiency of the battery 1100.

[0132] In another possible embodiment, one side of the insulating member 30 is bonded to the first battery cell 201; the other side of the insulating member 30 is bonded to the first side beam 121. The insulating member 30 is bonded between the first battery cell 201 and the first side beam 121 by an adhesive. The bonding operation is simple, which is conducive to improving the production efficiency of the battery 1100.

[0133] By adopting the technical solution of this embodiment, the insulating member 30 is connected by bonding, which makes the bonding operation simple and helps to improve the production efficiency of the battery 1100.

[0134] In a low temperature environment, the chemical reaction rate of the battery cell 20 will decrease, resulting in a decrease in the discharge capacity and power output capability of the battery cell 20; in particular, the heat of the battery cell 20 adjacent to the side beam of the box body 10 is more easily transferred to the outside of the battery 1100 through the side beam, so that the temperature of the battery cell 20 adjacent to the side beam of the box body 10 will be relatively low, which makes the battery cell 20 adjacent to the side beam of the box body 10 more susceptible to the low temperature environment, thereby affecting the overall charge and discharge performance of the battery 1100.

[0135] Please refer to Figures 7 and 8 . Figure 7 is a schematic diagram of the structure of the battery 1100 shown in Figure 2 hidden in the box 10 . Figure 8 is a schematic diagram of the structure of the insulating member 30 shown in Figure 7 .

[0136] In some other embodiments of the present application, as shown in FIG. 7 and FIG. 8 , the insulating member 30 is an elastic insulating member or a hard insulating member; and / or, the insulating member 30 is a heat-insulating insulating member.

[0137] In one possible embodiment, the insulating member 30 is an elastic insulating member. It will be appreciated that the insulating member 30 is made of an elastic insulating material and has a certain elastic force. On the one hand, during the charge and discharge process of the first battery cell 201, the first surface 21 can squeeze the insulating member 30 and deform it, thereby providing space for the first battery cell 201 to expand, which is beneficial for improving the charge and discharge performance of the first battery cell 201. On the other hand, the insulating member 30 can effectively absorb impact force through elastic deformation, reducing the impact force on the first battery cell 201, which is beneficial for improving the reliability of the battery 1100.

[0138] The elastic insulating material may be, but is not limited to, elastic plastic (eg, rubber, silicone, etc.) or elastic composite material (eg, rubber composite material, polyurethane composite material, polyethylene composite material, polypropylene composite material, fluororubber composite material).

[0139] The insulating member 30 may be a single-layer structure made of elastic insulating material. The insulating member 30 may also be a multi-layer structure, where one layer of the insulating member 30 is made of elastic insulating material.

[0140] In another possible embodiment, the insulating part 30 is a hard insulating part. It can be understood that the insulating part 30 is made of hard insulating material. The insulating part 30 has good structural strength and can provide better protection for the first battery cell 201, which is beneficial to improving the reliability of the battery 1100.

[0141] The rigid insulating material may include, but is not limited to, rigid rubber materials (e.g., silicone rubber and EPDM), rigid insulating composite materials (e.g., silicon carbide composite materials, zirconium oxide composite materials, ceramic composite materials), and rigid foam materials (e.g., foamed plastic, foamed polyurethane, etc.). When the insulating member 30 is made of rigid plastic material, the insulating member 30 may be manufactured using processes such as injection molding, extrusion, and machining.

[0142] In another possible embodiment, the insulating member 30 is a thermally insulating member. It is understood that the insulating member 30 is made of an insulating material with thermal insulation properties. In low-temperature environments, the thermally insulating member can reduce heat transfer between the first side beam 121 and the first battery cell 201, thereby reducing the impact of the low-temperature environment on the first battery cell 201 and improving the thermal insulation performance and overall charge and discharge performance of the battery 1100. The insulating member 30 can be made of a rigid foam material (e.g., foamed plastic, foamed polyurethane, etc.).

[0143] In another possible embodiment, the insulating member 30 is both an elastic insulating member and a thermal insulating member. That is, the insulating member 30 is made of an insulating material having elastic and thermal insulating properties. This allows the insulating member 30 to function as both a buffer and a thermal insulator, thereby improving the performance of the battery 1100. For example, the insulating material may be, but is not limited to, a polyimide or polyethylene composite material.

[0144] In another possible embodiment, the insulating member 30 is both a rigid insulating member and a heat-insulating insulating member. That is, the insulating member 30 is made of a rigid insulating material with heat-insulating properties. This allows the insulating member 30 to provide both protection and heat insulation, thereby improving the performance of the battery 1100. For example, the rigid insulating material may be, but is not limited to, a rigid foam material (such as foamed plastic, foamed polyurethane, etc.).

[0145] By adopting the technical solution of this embodiment, when the insulating part 30 is an elastic insulating part, the insulating part 30 can also play a buffering role. On the one hand, it can buffer the expansion deformation of the first battery cell 201. On the other hand, it can also buffer the impact, which can reduce the impact deformation of the first battery cell 201, which is beneficial to improving the reliability of the battery 1100. When the insulating part 30 is a hard insulating part, the hard insulating part can protect the first battery cell 201, reduce the impact deformation of the first battery cell 201, and improve the reliability of the battery 1100. When the insulating part 30 is a heat-insulating insulating part, the insulating part 30 can play a heat-insulating role, thereby reducing the impact of the low temperature environment on the first battery cell 201, and improving the thermal insulation performance and overall charge and discharge performance of the battery 1100.

[0146] Please refer to Figures 9 and 10 . Figure 9 is a schematic diagram of the structure of the battery 1100 provided in some embodiments of the present application after being hidden in the box 10 . Figure 10 is a schematic diagram of the exploded structure of the insulating member 30 shown in Figure 9 .

[0147] In other embodiments of the present application, as shown in Figures 9 and 10, the insulating member 30 includes a plurality of layers 31, and the plurality of layers 31 are stacked along a first direction, where the first direction is the distribution direction of the battery cells 20 and the first side beam 121; wherein the plurality of layers 31 include at least one of an elastic insulating layer and a hard insulating layer; and / or, the plurality of layers 31 include a thermal insulating layer.

[0148] The insulating member 30 has a multilayer structure, with each layer forming a layer 31. Multiple layers 31 are stacked along a first direction to form the insulating member 30. The layers 31 may be sheet-shaped and are stacked and cover the first surface 21 of the first battery cell 201. The first direction may refer to the distribution direction of the first battery cells 201 and the first side beam 121. As shown in FIG10 , the distribution direction of the first battery cells 201 and the first side beam 121 is parallel to the width direction of the battery 1100, meaning that the first direction may also refer to the width direction of the battery 1100. The number of layers 31 may be two, three, or four or more, depending on the design of the battery 1100.

[0149] The elastic insulating layer may refer to a component made of elastic insulating material.

[0150] The hard insulating layer may refer to a component made of a hard insulating material.

[0151] The thermal insulation layer may refer to a component made of an insulating material having thermal insulation properties.

[0152] In one possible embodiment, the multiple layers 31 include an elastic insulating layer, that is, at least one of the multiple layers 31 is an elastic insulating layer. The multiple layers 31 may include one or more elastic insulating layers. When the insulating member 30 includes multiple elastic insulating layers, the multiple elastic insulating layers may be made of the same material or different materials.

[0153] The provision of the elastic insulating layer can give the insulating member 30 a buffering property, and can provide a buffer space for the expansion of the first battery cell 201, so as to improve the reliability of the use of the first battery cell 201; in addition, the elastic insulating layer can better absorb the impact force through elastic deformation, thereby reducing the impact force on the first battery cell 201, which is beneficial to improving the reliability of the use of the battery 1100.

[0154] In another possible embodiment, the multiple layers 31 include a hard insulating layer, that is, at least one of the multiple layers 31 is a hard insulating layer. The multiple layers 31 may include one or more hard insulating layers. When the insulating member 30 includes multiple hard insulating layers, the multiple hard insulating layers may be made of the same material or different materials.

[0155] The provision of the hard insulating layer can improve the structural strength of the insulating member 30 . The insulating member 30 has a good protective effect on the first battery cell 201 , can reduce the impact deformation of the first battery cell 201 , reduce the risk of short circuit, and improve the reliability of the battery 1100 .

[0156] In another possible embodiment, the multiple layers 31 include elastic insulating layers and hard insulating layers, that is, at least one layer 31 among the multiple layers 31 is a hard insulating layer, and at least one layer 31 among the multiple layers 31 is an elastic insulating layer. Among the multiple layers 31, the number of elastic insulating layers can be one or more; wherein, when the insulating member 30 includes multiple elastic insulating layers, the multiple elastic insulating layers can be made of the same material or different materials; among the multiple layers 31, the number of hard insulating layers can be one or more; wherein, when the insulating member 30 includes multiple hard insulating layers, the multiple hard insulating layers can be made of the same material or different materials. For example, the insulating member 30 can be a composite of elastic plastic and hard rubber, a composite of hard composite material and elastic plastic, a composite of elastic plastic and hard foam material, a composite of elastic composite material and hard rubber, a composite of elastic composite material and hard foam material, a composite of elastic composite material and hard composite material, etc.

[0157] The provision of the elastic insulating layer and the hard insulating layer enables the insulating member 30 to have the performance of both the elastic insulating layer and the hard insulating layer, and can also better reduce the impact deformation of the first battery cell 201 and improve the reliability of the battery 1100.

[0158] In another possible embodiment, the multiple layers 31 include a thermal insulation layer, that is, at least one of the multiple layers 31 is a thermal insulation layer. The multiple layers 31 may include one or more thermal insulation layers. When the insulating member 30 includes multiple thermal insulation layers, the multiple thermal insulation layers may be made of the same material or different materials.

[0159] The provision of the heat-insulating layer enables the insulating member 30 to have heat-insulating properties, thereby reducing the heat transfer from the first battery cell 201 to the outside through the first side beam 121, thereby reducing the impact of low temperature on the first battery cell 201 and improving the thermal insulation performance and overall charge and discharge performance of the battery 1100.

[0160] In another possible embodiment, the multiple layers 31 include an elastic insulating layer and a thermal insulating layer; as an example, at least one layer 31 among the multiple layers 31 is a thermal insulating layer, and at least one layer 31 among the multiple layers 31 is an elastic insulating layer.

[0161] In the multiple layers 31 , the number of the elastic insulating layer may be one or more. In the case where the insulating member 30 includes multiple elastic insulating layers, the multiple elastic insulating layers may be made of the same material or different materials.

[0162] The number of thermal insulation layers in the multiple layers 31 can be one or more. When the insulating member 30 includes multiple thermal insulation layers, the multiple thermal insulation layers can be made of the same material or different materials. For example, the insulating member 30 can be made of a composite material of elastic composite material and foam material, a composite material of elastic rigid plastic and foam plastic, or a composite material of elastic composite material and rigid foam material.

[0163] As another example, at least one layer 31 among the multiple layers 31 is both an elastic insulating layer and a heat-insulating insulating layer, that is, these layers 31 are made of elastic insulating material with heat-insulating properties, so that the insulating part 30 can play both a buffering role and a heat-insulating role to improve the performance of the battery 1100.

[0164] Among the multiple layers 31, the number of layers 31 having both elasticity and thermal insulation properties can be one or more. When the insulating member 30 includes multiple layers 31 having both elasticity and thermal insulation properties, the multiple layers 31 having both elasticity and thermal insulation properties can be made of the same material or different materials. For example, the layers 31 can be made of materials such as polyimide and polyethylene composite materials.

[0165] The setting of the elastic insulating layer and the heat-insulating insulating layer enables the insulating member 30 to have the performance of both the elastic insulating layer and the heat-insulating insulating layer. The insulating member 30 has buffering and heat-insulating functions, which can improve the reliability and thermal insulation performance of the battery 1100 as well as the overall charge and discharge performance.

[0166] In another possible embodiment, the multiple layers 31 include a hard insulating layer and a heat-insulating layer; as an example, at least one layer 31 among the multiple layers 31 is a heat-insulating layer, and at least one layer 31 among the multiple layers 31 is a hard insulating layer.

[0167] In the multiple layers 31 , the number of the hard insulating layer may be one or more. When the insulating member 30 includes multiple hard insulating layers, the multiple hard insulating layers may be made of the same material or different materials.

[0168] The number of thermal insulation layers in the multiple layers 31 can be one or more. When the insulating member 30 includes multiple thermal insulation layers, the multiple thermal insulation layers can be made of the same material or different materials. For example, the insulating member 30 can be a composite of hard rubber and hard foam material, or a composite of hard composite material and hard foam material.

[0169] As another example, at least one layer 31 among the multiple layers 31 may be both a hard insulating layer and a heat-insulating insulating layer, that is, these layers 31 are made of a hard insulating material with heat-insulating properties, so that the insulating part 30 can not only provide good protection for the first battery cell 201, but also provide heat insulation, so as to improve the performance of the battery 1100.

[0170] Among the multiple layers 31, the number of the hard layers 31 with thermal insulation performance can be one or more. When the insulating member 30 includes multiple hard layers 31 with thermal insulation performance, the multiple hard layers 31 with thermal insulation performance can be made of the same material or different materials. For example, the layers 31 can be made of a rigid foam material.

[0171] The setting of the hard insulating layer and the heat-insulating insulating layer enables the insulating part 30 to have the performance of both a hard insulating layer and a heat-insulating insulating layer. On the basis of the good protection of the first battery cell 201 by the insulating part 30, the insulating part 30 also has heat-insulating performance, which can improve the reliability and thermal insulation performance of the battery 1100 as well as the overall charging and discharging performance.

[0172] In another possible embodiment, the multiple layers 31 include a hard insulating layer, an elastic insulating layer and a thermal insulating layer; as an example, at least one layer 31 among the multiple layers 31 is a thermal insulating layer, at least one layer 31 among the multiple layers 31 is a hard insulating layer, and at least one layer 31 among the multiple layers 31 is an elastic insulating layer.

[0173] In the multiple layers 31 , the number of the hard insulating layer may be one or more. When the insulating member 30 includes multiple hard insulating layers, the multiple hard insulating layers may be made of the same material or different materials.

[0174] In the multiple layers 31 , the number of the thermal insulation layer can be one or more. In the case where the insulating member 30 includes multiple thermal insulation layers, the multiple thermal insulation layers can be made of the same material or different materials.

[0175] In the multiple layers 31 , the number of the elastic insulating layer may be one or more. In the case where the insulating member 30 includes multiple elastic insulating layers, the multiple elastic insulating layers may be made of the same material or different materials.

[0176] As another example, at least one layer 31 among the multiple layers 31 is both an elastic insulating layer and a heat-insulating insulating layer, that is, these layers 31 are made of hard insulating materials with heat-insulating properties, so that the insulating part 30 can play both a buffering role and a heat-insulating role to improve the performance of the battery 1100.

[0177] Among the multiple layers 31, the number of layers 31 having both elasticity and thermal insulation properties may refer to one or more. When the insulating part 30 includes multiple layers 31 having both elasticity and thermal insulation properties, the multiple layers 31 having both elasticity and thermal insulation properties may be made of the same material or different materials.

[0178] As another example, at least one layer 31 among the multiple layers 31 is both an elastic insulating layer and a heat-insulating insulating layer, that is, these layers 31 are made of hard insulating materials with heat-insulating properties, so that the insulating part 30 can play both a buffering role and a heat-insulating role to improve the performance of the battery 1100.

[0179] Among the multiple layers 31, the number of layers 31 having both elasticity and thermal insulation properties may refer to one or more. When the insulating part 30 includes multiple layers 31 having both elasticity and thermal insulation properties, the multiple layers 31 having both elasticity and thermal insulation properties may be made of the same material or different materials.

[0180] The setting of the elastic insulating layer and the heat-insulating insulating layer enables the insulating member 30 to have the performance of both the elastic insulating layer and the heat-insulating insulating layer. The insulating member 30 has buffering and heat-insulating functions, which can improve the reliability and thermal insulation performance of the battery 1100 as well as the overall charge and discharge performance.

[0181] The arrangement of the elastic insulating layer, the hard insulating layer and the heat-insulating insulating layer enables the insulating part 30 to have the performance of the hard insulating layer, the elastic insulating layer and the heat-insulating insulating layer at the same time. In addition to the good protection of the first battery cell 201 by the insulating part 30, the insulating part 30 also has buffering performance and heat-insulating performance, which can effectively improve the reliability of the battery 1100, improve the thermal insulation performance of the battery 1100 and the overall charging and discharging performance.

[0182] By adopting the technical solution of this embodiment, the insulating part 30 can adopt a multi-layer structure, and the structural strength of the insulating part 30 is good. The materials of each layer 31 can also be flexibly set according to actual needs, so that the insulating part 30 has different properties, so as to better improve the reliability and performance of the battery 1100.

[0183] Please refer to Figures 11 and 12 . Figure 11 is a schematic diagram of the structure of a battery 1100 provided in another embodiment of the present application after being hidden in the box 10 . Figure 12 is a schematic diagram of the structure of the insulating member 30 shown in Figure 11 .

[0184] In some other embodiments of the present application, referring to FIG. 11 and FIG. 12 , a protrusion 32 is provided on a surface of the insulating member 30 facing the first side beam 121 .

[0185] The protrusion 32 may refer to a protrusion 32 structure formed on a surface of the insulating member facing the first side beam 121 .

[0186] By adopting the technical solution of this embodiment, the setting of the protrusion 32 allows a deformation space to be formed between the insulating part 30 and the first side beam 121 for the first side beam 121 to deform due to impact, so as to buffer the impact of the first side beam 121 on the insulating part 30, thereby reducing the risk of impact deformation of the first battery cell 201, reducing the risk of short circuit, and improving the reliability of the battery 1100.

[0187] In some other embodiments of the present application, there are multiple protrusions 32 , and the multiple protrusions 32 are arranged at intervals along the height direction of the first battery cell 201 .

[0188] The height direction of the first battery cell 201 may be parallel to the height direction of the battery 1100, and the plurality of protrusions 32 may be evenly distributed along the height direction of the first battery cell 201. As an example, the protrusions 32 may extend along the length direction of the first battery cell 201. Of course, in other examples, the protrusions 32 may also extend along other directions.

[0189] By adopting the technical solution of this embodiment, multiple protrusions 32 can form multi-point buffering for the impact of the first side beam 121 on the insulating part 30 along the height direction of the first battery cell 201, thereby better reducing the impact force of the first battery cell 201, reducing the risk of impact deformation of the first battery cell 201, reducing the risk of short circuit, and improving the reliability of the battery 1100.

[0190] In other embodiments of the present application, referring to Figures 4 and 5, there are multiple first battery cells 201, and the multiple first battery cells 201 are arranged along the second direction, which is parallel to the first surface 21: at least two first battery cells 201 are connected to the insulating member 30.

[0191] The second direction may be a direction parallel to the first surface 21. Referring to FIG4 , the first surface 21 is parallel to the length direction of the battery 1100. The second direction may also be the length direction of the battery 1100. The plurality of battery cells 20 in a row of battery cells 20 adjacent to the first side beam 121 are all first battery cells 201.

[0192] At least two first battery cells 201 are connected to the insulating member 30. It is understood that two or more first battery cells 201 in a row of battery cells 20 adjacent to the first side beam 121 are connected to the insulating member 30. The first battery cells 201 connected to the insulating member 30 may be multiple first battery cells 201 arranged adjacent to each other, or multiple battery cells 20 arranged non-adjacently.

[0193] By adopting the technical solution of this embodiment, the insulating member 30 can connect multiple first battery cells 201 together to form a whole, which can improve the structural strength of the multiple first battery cells 201, help reduce the impact deformation of the first battery cells 201, and improve the reliability of the battery 1100.

[0194] In some other embodiments of the present application, a projection of the insulating member 30 along the first direction at least partially overlaps with a projection of the first surfaces 21 of at least two first battery cells 201 along the first direction, and the first direction is perpendicular to the first surface 21 .

[0195] It is understood that the insulating member 30 may cover at least a portion of the first surface 21 of at least two first battery cells 201. A portion of the first surface 21 of the first battery cell 201 may be covered with the insulating member 30, while another portion of the first surface 21 of the first battery cell 201 may not be covered with the insulating member 30. Alternatively, the insulating member 30 may cover the entire first surface 21 of the first battery cell 201. The insulating member 30 may cover the first surface 21 of two or more first battery cells 201, or the insulating member 30 may cover the first surface 21 of all first battery cells 201.

[0196] The first direction may refer to a surface perpendicular to the first surface 21. Referring to Figures 2 and 3, the width direction of the battery 1100 is perpendicular to the first surface 21. The first direction may refer to the width direction of the battery 1100. The width direction of the battery cell 20 is also perpendicular to the first surface 21. The first direction may also refer to the width direction of the battery cell 20.

[0197] By adopting the technical solution of this embodiment, the insulating member 30 can also provide protection for the multiple first battery cells 201 , which is also beneficial to reducing the short circuit risk of the first battery cells 201 and improving the reliability of the battery 1100 .

[0198] In other embodiments of the present application, referring to FIG. 5 and FIG. 6 , the first side beam 121 is provided with a mounting structure 1211 for mounting the battery 1100 .

[0199] It is understood that the mounting structure 1211 may refer to the structure provided on the first side member 121 for securing the battery 1100 to the vehicle 1000. Generally, the first side member 121 provided with the mounting structure 1211 has greater structural strength than the other side members, thereby ensuring stable mounting of the battery 1100. For example, the mounting structure 1211 may be a mounting beam provided on the first side member 121. The mounting beam may be integrally formed with the first side member 121 or a separately formed component, connected to the first side member 121 via a connecting structure. The mounting beam may be provided with connecting holes, through which connecting members, such as bolts or screws, connect to the vehicle body or frame of the vehicle 1000 to secure the battery 1100. If the first side member 121 extends along the length of the battery 1100, the mounting beam also extends along the length of the battery 1100. This arrangement effectively increases the structural strength of the first side member 121 provided with the mounting beam.

[0200] By adopting the technical solution of this embodiment, the first side beam 121 provided with the mounting structure 1211 has good structural strength, so that the first side beam 121 provided with the mounting structure 1211 can better protect the first battery cell 201, effectively reduce the impact deformation of the first battery cell 201, reduce the short circuit risk of the first battery cell 201, and improve the reliability of the battery 1100.

[0201] In some embodiments, when the first surface 21 of the first battery cell 201 abuts against the first side beam 121 through the insulating member 30, the first side beam 121 provided with the mounting structure 1211 has good structural strength, so that the first side beam 121 provided with the mounting structure 1211 can effectively limit the expansion and deformation of the battery cell 20, thereby eliminating the expansion beam and anti-expansion strip in the box body 10, thereby reducing the production cost of the box body 10 and improving the volume energy density of the battery 1100.

[0202] In other embodiments of the present application, referring to Figures 5 and 6, there are two first side beams 121, the two first side beams 121 are arranged opposite to each other, and the battery cell 20 is located between the two first side beams 121, an insulating member 30 is arranged between one of the first side beams 121 and the corresponding first battery cell 201, and an insulating member 30 is arranged between the other first side beam 121 and the corresponding first battery cell 201.

[0203] The two first side beams 121 are arranged at intervals, and the battery cell 20 is located in the gap between the two first side beams 121; when there is only one battery cell 20, the battery cell 20 is located in the gap between the two first side beams 121, and an insulating member 30 is provided between the two first side beams 121 and the battery cell 20; when there are multiple battery cells 20, multiple battery cells 20 are located between the two first side beams 121, and an insulating member 30 is provided between the battery cell 20 (first battery cell 201) adjacent to one of the first side beams 121 and the first side beam 121, and an insulating member 30 is provided between the battery cell 20 (first battery cell 201) adjacent to the other first side beam 121 and the corresponding first side beam 121.

[0204] As shown in Figure 5, two first side beams 121 are arranged at intervals along the width direction of the battery 1100, and multiple battery cells 20 are divided into multiple columns of battery cells 20. The multiple battery cells 20 in each column of battery cells 20 are arranged along the length direction of the battery 1100, and the multiple columns of battery cells 20 are arranged along the width direction of the battery 1100; an insulating member 30 is provided between a column of battery cells 20 adjacent to one of the first side beams 121 and the corresponding first side beam 121, and an insulating member 30 is provided between a column of battery cells 20 adjacent to the other first side beam 121 and the corresponding first side beam 121, that is, the multiple battery cells 20 in the two opposite columns of battery cells 20 along the width direction of the battery 1100 are all first battery cells 201, and insulating members 30 are respectively provided between these two columns of first battery cells 201 and the corresponding first side beams 121.

[0205] By adopting the technical solution of this embodiment, when the battery 1100 hits the corresponding first side beam 121 from the opposite sides, the first surface 21 of the first battery cell 201 and the insulating part 30 jointly bear the impact. This can reduce the impact deformation of the first battery cell 201, effectively reduce the short circuit risk of the first battery cell 201, and is conducive to improving the reliability of the battery 1100.

[0206] In other embodiments of the present application, referring to Figure 5, there are multiple first battery cells 201, and the multiple battery cells 20 include first-type battery cells 202 and second-type battery cells 203. At least the first battery cell 201 is a second-type battery cell 203, and the energy density of the second-type battery cell 203 is greater than the energy density of the first-type battery cell 202.

[0207] Among the multiple battery cells 20, a part of the battery cells 20 are first-type battery cells 202, another part of the battery cells 20 are second-type battery cells 203, and the battery cells 20 adjacent to the first side beam 121 (first battery cells 201) are second-type battery cells 203; among the other battery cells 20 except the first battery cell 201, a part of the battery cells 20 can be second-type battery cells 203, and another part of the battery cells 20 can be first-type battery cells 202, or all can be first-type battery cells 202.

[0208] As shown in Figure 5, multiple battery cells 20 in a column of battery cells 20 adjacent to the first side beam 121 are all second-type battery cells 203, and the battery cells 20 in other columns of battery cells 20 are all first-type battery cells 202, that is, along the width direction of the battery cells 20, the battery cells 20 located on both sides are all second-type battery cells 203, and the other battery cells 20 are all first-type battery cells 202; of course, in other embodiments, the battery cells 20 in two or more columns of battery cells 20 adjacent to the first side beam 121 are second-type battery cells 203, and the battery cells 20 in other columns of battery cells 20 are first-type battery cells 202.

[0209] The energy density of the battery cell 20 may be a volumetric energy density or a weight energy density. In the present application, the energy density of the second type of battery cell 203 is greater than the energy density of the first type of battery cell 202. In one example, the volumetric energy density E1 of the first type of battery cell 202 may be, for example, in the range of 200 to 450Wh / L. In one example, the volumetric energy density E2 of the second type of battery cell 203 may be, for example, in the range of 450 to 750Wh / L. In one example, the weight energy density G1 of the first type of battery cell 202 may be, for example, in the range of 100 to 220Wh / Kg. In one example, the weight energy density G2 of the second type of battery cell 203 may be, for example, in the range of 220 to 350Wh / Kg. In general, when the battery 1100 operates in a low temperature environment, such as -20°C, the charge and discharge performance of the battery cell 20 with a higher energy density is better than that of the battery cell 20 with a lower energy density.

[0210] Since the heat of the battery cell 20 will be dissipated from the box body 10 in a low temperature environment, the heat of the first battery cell 201 adjacent to the first side beam 121 is more easily transferred to the outside of the battery 1100 through the first side beam 121, resulting in a relatively low temperature of the first battery cell 201, which also makes the first battery cell 201 more affected by the low temperature environment.

[0211] By adopting the technical solution of this embodiment, the first battery cell 201 is set as the second type battery cell 203, and the second type battery cell 203 has a higher energy density, so that the second type battery cell 203 has better charging and discharging performance at low temperatures, which can reduce the impact of the low temperature environment on the first battery cell 201, and can effectively improve the thermal insulation performance and charging and discharging performance of the battery 1100 at low temperatures, improve the temperature difference, and can also well balance the cost and capacity of the battery 1100.

[0212] In other embodiments of the present application, as shown in FIG5 , the first type of battery cell 202 is a battery cell 20 of a sodium ion electrochemical system, and the second type of battery cell 203 is a battery cell 20 using an olivine structured active material as a main positive electrode material.

[0213] The first type of battery cell 202 uses a battery cell 20 of a sodium ion electrochemical system, wherein the sodium ion electrochemical system includes but is not limited to a Prussian blue derivative / hard carbon system, a polyanion fast ion conductor sodium vanadium phosphate (or sodium vanadium fluorophosphate, sodium vanadium fluorooxyphosphate) / hard carbon system, a transition metal oxide / hard carbon system, etc.

[0214] The second type of battery cell 203 uses an olivine structure active material as the main positive electrode material of the battery cell 20. The olivine structure active material can be but is not limited to LiFePO4, LiMn 0.6 Fe 0.4 PO4.

[0215] Generally speaking, the energy density of a battery cell 20 of a sodium ion electrochemical system is greater than the energy density of a battery cell 20 using an olivine-structured active material as a main positive electrode material.

[0216] In other embodiments of the present application, as shown in FIG5 , the first type of battery cell 202 is a battery cell 20 of a sodium ion electrochemical system, and the second type of battery cell 203 is a battery cell 20 using a layered structure of lithium nickel cobalt manganese oxide as a main positive electrode material.

[0217] The second type of battery cell 203 uses a battery cell 20 using a layered structure of lithium nickel cobalt manganese oxide as the main positive electrode material. The layered structure of lithium nickel cobalt manganese oxide can be but is not limited to LiNi 0.60 Co 0.10 Mn 0.30 O2.

[0218] Generally speaking, the energy density of a battery cell 20 of a sodium ion electrochemical system is greater than the energy density of a battery cell 20 using layered lithium nickel cobalt manganese oxide as the main positive electrode material.

[0219] In other embodiments of the present application, as shown in FIG5 , the first type of battery cell 202 is a battery cell 20 using an olivine structure active material as the main positive electrode material, and the second type of battery cell 203 is a battery cell 20 using a layered structure of lithium nickel cobalt manganese oxide as the main positive electrode material.

[0220] Generally speaking, the energy density of the battery cell 20 using the olivine structure active material as the main positive electrode material is greater than the energy density of the battery cell 20 using the layered structure lithium nickel cobalt manganese oxide as the main positive electrode material.

[0221] By selecting the above-mentioned first type battery cells 202 and second type battery cells 203, the energy density of the selected second type battery cells 203 can be better made greater than the energy density of the first type battery cells 202, thereby improving the overall thermal insulation performance, charge and discharge performance and energy density of the battery 1100 at low temperatures.

[0222] In other embodiments of the present application, referring to FIG5 , the first type of battery cell 202 includes a sodium ion battery cell, and the second type of battery cell 203 includes a lithium ion battery cell; or, the first type of battery cell 202 includes a lithium iron phosphate battery cell, and the second type of battery cell 203 includes a ternary battery cell.

[0223] A lithium-ion battery cell is a battery cell whose positive electrode active material contains lithium. The lithium-containing positive electrode active material includes at least one of a layered lithium-containing positive electrode active material, a spinel lithium-containing positive electrode active material, or an olivine lithium-containing positive electrode active material.

[0224] The layered lithium-containing positive electrode active material includes at least one of lithium cobalt oxide, lithium nickel oxide, lithium-rich material, nickel-cobalt-manganese ternary material and manganese-cobalt-aluminum ternary material.

[0225] The spinel-structured lithium-containing positive electrode active material includes lithium manganate.

[0226] The lithium-containing positive electrode active material with an olivine structure includes at least one of lithium iron phosphate and lithium manganese iron phosphate.

[0227] A lithium iron phosphate battery cell refers to a battery cell 20 in which the positive electrode active material of the electrode plate is lithium iron phosphate.

[0228] A ternary battery cell, also known as a ternary lithium battery cell, refers to a battery cell 20 in which the positive electrode active material of the electrode plate uses a lithium-containing ternary positive electrode active material. The lithium-containing ternary positive electrode active material includes at least one of lithium cobalt oxide, lithium nickel oxide, lithium-rich materials, nickel-cobalt-manganese ternary materials, and manganese-cobalt-aluminum ternary materials.

[0229] A sodium ion battery cell refers to a battery cell 20 that operates by the movement of sodium ions between a positive electrode and a negative electrode.

[0230] Generally speaking, the energy density of lithium-ion battery cells is greater than that of sodium-ion battery cells. The energy density of ternary battery cells is greater than that of lithium iron phosphate battery cells.

[0231] By selecting the above-mentioned first type battery cells 202 and second type battery cells 203, the energy density of the selected second type battery cells 203 can be better made greater than the energy density of the first type battery cells 202, thereby improving the overall thermal insulation performance, charge and discharge performance and energy density of the battery 1100 at low temperatures.

[0232] In other embodiments of the present application, in combination with Figures 2, 4 and 5, the box body 10 also includes a reinforcing beam 123, which is located in the receiving space 101 and divides the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012, and the insulating member 30 and the battery cell 20 are located in the first receiving cavity 1011.

[0233] The reinforcing beam 123 may refer to a beam located in the receiving space 101 . The reinforcing beam 123 may divide the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012 . The first receiving cavity 1011 may be used to receive the battery cell 20 and the insulating member 30 .

[0234] As shown in Figure 4, the reinforcing beam 123 extends along the width direction of the battery 1100, and the two ends of the reinforcing beam 123 are respectively connected to the two first side beams 121 along the length direction of the battery 1100. A part of the two first side beams 121, the reinforcing beam 123 and the second side beam 122 located on one side of the length direction of the battery 1100 are arranged to form a first receiving cavity 1011, and another part of the two first side beams 121, the reinforcing beam 123 and the second side beam 122 located on the other side of the length direction of the battery 1100 are arranged to form a second receiving cavity 1012. The first receiving cavity 1011 and the second receiving cavity 1012 are arranged side by side.

[0235] By adopting the technical solution of this embodiment, the provision of the reinforcing beam 123 can increase the structural strength of the box body 10, which is beneficial to improving the reliability of the battery 1100; the first receiving cavity 1011 is used to accommodate the battery cell 20, and the second receiving cavity 1012 can accommodate other components of the battery 1100. The battery cell 20 and other components can be separated by the reinforcing beam 123, which can reduce the risk of damage to the battery cell 20 and short circuit caused by interference between other components and the battery cell 20, and is more beneficial to improving the reliability of the battery 1100; the box body 10 adopts the structural form of the first side beam 121, the reinforcing beam 123 and the second side beam 122, which has a simple structure and good structural reliability. The horizontal and vertical beams provided inside the first receiving cavity 1011 can also be cancelled to provide more space for installing the battery cell 20, which is beneficial to improving the volume energy density of the battery 1100.

[0236] In some other embodiments of the present application, as shown in FIG. 2 , FIG. 4 and FIG. 5 , the battery 1100 further includes a control device 40 for controlling the battery cell 20 , and the control device 40 is located in the second receiving cavity 1012 .

[0237] The control device 40 may refer to a component for controlling the charging and discharging of the battery cell 20 , wherein the control device 40 may be a battery management system (BMS) of the battery 1100 .

[0238] By adopting the technical solution of this embodiment, the control device 40 is the second receiving cavity 1012, and the battery cell 20 and the control device 40 are separated and isolated by the reinforcing beam 123, which can reduce the mutual influence between the battery cell 20 and the control device 40, and is conducive to improving the reliability of the battery 1100.

[0239] In some other embodiments of the present application, as shown in FIG. 2 , the box body 10 further includes a sealing plate 124 . The sealing plate 124 is located on one side of the first side beam 121 and closes an opening on one side of the receiving space 101 .

[0240] The sealing plate 124 may be a plate-shaped member that closes the opening on one side of the receiving space 101. Specifically, the sealing plate 124 may close only the opening on one side of the first receiving cavity 1011, or it may simultaneously close the openings on the same side of the first receiving cavity 1011 and the second receiving cavity 1012. The sealing plate 124 may be connected to the side beams of the box body 10 by screwing, clamping, or bonding.

[0241] As an example, when the lower box body 12 is a hollow structure with one end open and the box cover 11 is a plate-like structure, the sealing plate 124 may be the box cover 11, or the sealing plate 124 may be a bottom plate in the box cover 11 arranged opposite to the lower box body 12; when the lower box body 12 and the box cover 11 are both hollow structures with one side open, the sealing plate 124 may be a bottom plate in the lower box body 12 arranged opposite to the box cover 11.

[0242] By adopting the technical solution of this embodiment, the sealing plate 124 seals the opening on one side of the receiving space 101 , which can reduce the impact of external components on the battery cell 20 and the insulating member 30 , and is conducive to improving the reliability of the battery 1100 .

[0243] In some other embodiments of the present application, as shown in FIG. 2 , the sealing plate 124 is a heat exchange plate 125 for exchanging heat with the battery cells 20 .

[0244] It is understood that the sealing plate 124 may refer to the heat exchange plate 125, which can exchange heat with the battery cells 20. The heat exchange plate 125 is provided with a heat exchange channel, through which the heat exchange medium flows, thereby achieving heat exchange between the battery cells 20. The heat exchange plate 125 can be a multi-layer plate structure, with the heat exchange channel formed between the two layers of plates; the heat exchange plate 125 can also be a tube plate structure.

[0245] When the temperature of the heat exchange medium in the heat exchange channel of the heat exchange plate 125 is higher than that of the battery cell 20, the heat exchange plate 125 heats the battery cell 20. When the temperature of the heat exchange medium in the heat exchange channel of the heat exchange plate 125 is lower than that of the battery cell 20, the heat exchange plate 125 cools the battery cell 20, thereby achieving heat exchange between the battery cells 20. In specific applications, the sealing plate 124 can be located at the bottom of the battery cell 20 to achieve heat exchange at the bottom of the battery cell 20, or at the top of the battery cell 20 to achieve heat exchange at the top of the battery 1100.

[0246] By adopting the technical solution of this embodiment, the sealing plate 124 is a heat exchange plate 125, and the heat exchange plate 125 exchanges heat with the battery cell 20, which is beneficial to controlling the temperature of the battery cell 20 within a suitable temperature range, thereby improving the use reliability and charge and discharge performance of the battery cell 20, and improving the use reliability and charge and discharge performance of the battery 1100.

[0247] In other embodiments of the present application, as shown in FIG. 2 , the box body 10 further includes a box cover 11 . The box cover 11 is located on the other side of the first side beam 121 and closes the opening on the other side of the receiving space 101 .

[0248] The sealing plate 124 and the box cover 11 are respectively located on opposite sides of the first side beam 121 and respectively seal the openings on opposite sides of the receiving space 101. The box cover 11 can seal only the opening of the first receiving cavity 1011 facing away from the sealing plate 124, or it can seal both the opening of the first receiving cavity 1011 facing away from the sealing plate 124 and the opening of the second receiving cavity 1012 facing away from the sealing plate 124. The box cover 11 can be a plate-shaped component or a hollow structure with one side open. The box cover 11 can also exchange heat with the battery cells 20. In this way, the box cover 11 and the sealing plate 124 can achieve simultaneous heat exchange between the top and bottom of the battery cells 20, thereby improving the heat exchange effect of the battery cells 20 and enhancing the charge and discharge performance of the battery cells 20.

[0249] By adopting the technical solution of this embodiment, the box cover 11 and the sealing plate 124 can close the openings on opposite sides of the receiving space 101, thereby improving the sealing performance of the box body 10 and facilitating the improvement of the reliability and service life of the battery 1100.

[0250] The present application is described below with reference to some specific embodiments.

[0251] Example 1

[0252] In this embodiment, referring to Figures 1 to 8, the battery 1100 includes a housing 10, an insulating member 30 and at least one battery cell 20: the housing 10 includes a first side beam 121 and a second side beam 122, which are connected and enclosed to form a receiving space 101; at least one battery cell 20 is located in the receiving space 101, and the battery cell 20 adjacent to the first side beam 121 is a first battery cell 201, and the surface with the largest area of ​​the first battery cell 201 is the first surface 21, and the first surface 21 of the first battery cell 201 is arranged to face the first side beam 121; the insulating member 30 is located in the receiving space 101, and the insulating member 30 is provided between the first battery cell 201 and the first side beam 121.

[0253] In this embodiment, the length of the first side beam 121 is greater than the length of the second side beam 122 .

[0254] In this embodiment, one side of the insulating member 30 abuts against the first battery cell 201 , and / or the other side of the insulating member 30 abuts against the first side beam 121 .

[0255] In this embodiment, the insulating member 30 fixedly connects the first battery cell 201 and the first side beam 121 .

[0256] In this embodiment, one side of the insulating member 30 is bonded to the first battery cell 201 ; and / or the other side of the insulating member 30 is bonded to the first side beam 121 .

[0257] In this embodiment, the insulating member 30 is an elastic insulating member or a hard insulating member; and / or, the insulating member 30 is a heat-insulating insulating member.

[0258] In this embodiment, there are multiple first battery cells 201 , which are arranged along a second direction parallel to the first surface 21 . At least two first battery cells 201 are connected to the insulating member 30 .

[0259] In this embodiment, a projection of the insulating member 30 along the first direction at least partially overlaps with a projection of the first surfaces 21 of at least two first battery cells 201 along the first direction, and the first direction is perpendicular to the first surfaces 21 .

[0260] In this embodiment, the first side beam 121 is provided with a mounting structure 1211 for mounting the battery 1100 .

[0261] In this embodiment, there are two first side beams 121, and the two first side beams 121 are arranged opposite to each other. The battery cell 20 is located between the two first side beams 121, and an insulating member 30 is arranged between one of the first side beams 121 and the corresponding first battery cell 201, and an insulating member 30 is arranged between the other first side beam 121 and the corresponding first battery cell 201.

[0262] In this embodiment, there are multiple first battery cells 201, and the multiple battery cells 20 include first-type battery cells 202 and second-type battery cells 203. At least the first battery cell 201 is a second-type battery cell 203, and the energy density of the second-type battery cell 203 is greater than the energy density of the first-type battery cell 202.

[0263] In this embodiment, the first type of battery cell 202 includes a sodium ion battery cell, and the second type of battery cell 203 includes a lithium ion battery cell; or, the first type of battery cell 202 includes a lithium iron phosphate battery cell, and the second type of battery cell 203 includes a ternary battery cell.

[0264] In this embodiment, the box body 10 further includes a reinforcing beam 123 , which is located in the receiving space 101 and divides the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012 . The insulating member 30 and the battery cell 20 are located in the first receiving cavity 1011 .

[0265] In this embodiment, the battery 1100 further includes a control device 40 for controlling the battery cell 20 . The control device 40 is located in the second receiving cavity 1012 .

[0266] In this embodiment, the box body 10 further includes a sealing plate 124 . The sealing plate 124 is located on one side of the first side beam 121 and closes an opening on one side of the receiving space 101 .

[0267] In this embodiment, the sealing plate 124 is a heat exchange plate 125 for exchanging heat with the battery cells 20 .

[0268] In this embodiment, the box body 10 further includes a box cover 11 . The box cover 11 is located on the other side of the first side beam 121 and closes the opening on the other side of the receiving space 101 .

[0269] In this embodiment, the battery 1100 has a height direction, a length direction, and a width direction. The height direction of the battery 1100 can be referred to as the Z direction, the width direction of the battery 1100 can be referred to as the X direction, and the length direction of the battery 1100 can be referred to as the Y direction. The length of the battery 1100 can be greater than the width. The housing 10 defines the external structure of the battery 1100. The height direction of the housing 10 is the height direction of the battery 1100, the length direction of the housing 10 is the length direction of the battery 1100, and the width direction of the housing 10 is the width direction of the battery 1100.

[0270] In this embodiment, the battery cell 20 also has a height, a length, and a width. The height of the battery cell 20 can be referred to as the Z1 direction, the width of the battery cell 20 can be referred to as the X1 direction, and the length of the battery cell 20 can be referred to as the Y1 direction. The battery cell 20 includes two first end faces 22 along its height. The distance between the two first end faces 22 defines the height of the battery cell 20. The battery cell 20 includes two first side faces 23 along its thickness and two second side faces 24 along its length. The distance between the two first side faces 23 defines the width of the battery cell 20, and the distance between the two second side faces 24 defines the length of the battery cell 20. The area of ​​the two first end faces 22 is determined by the length and width of the battery cell 20, the area of ​​the first side face 23 is determined by the height and length of the battery cell 20, and the area of ​​the second side face 24 is determined by the height and width of the battery cell 20. For a flat battery cell 20, such as a square, its width is smaller than its length and height, and its first side face 23 has the largest area. Therefore, the first side face 23 is also called the large side.

[0271] In this embodiment, the number of first side beams 121 is two, and the number of second side beams 122 is two. The two first side beams 121 and the two second side beams 122 are connected end to end to form a rectangular frame structure. The internal space of the rectangular frame structure forms a receiving space 101. The two first side beams 121 are located on opposite sides of the box body 10 along the width direction of the battery 1100 and extend along the length direction of the battery 1100. The two second side beams 122 are located on opposite sides of the box body 10 along the length direction of the battery 1100 and extend along the width direction of the battery 1100.

[0272] In this embodiment, the reinforcing beam 123 is located in the receiving space 101, and the two ends of the reinforcing beam 123 are respectively connected to the two first side beams 121. The reinforcing beam 123 extends along the width direction of the battery 1100. The reinforcing beam 123 divides the receiving space 101 into a first receiving cavity 1011 and a second receiving cavity 1012 distributed side by side along the length direction of the battery 1100.

[0273] In this embodiment, the battery 1100 includes a plurality of battery cells 20, and the plurality of battery cells 20 can form a plurality of columns of battery cells 20. The plurality of columns of battery cells 20 are arranged along the width direction of the battery 1100, and the plurality of battery cells 20 in each column of battery cells 20 are arranged along the length direction of the battery 1100; the plurality of battery cells 20 in two opposite columns of battery cells 20 along the width direction of the battery 1100 are all first battery cells 201.

[0274] In this embodiment, the height direction of each battery cell 20 is parallel to the height direction of the battery 1100, the width direction of each battery cell 20 is parallel to the width direction of the battery 1100, and the length direction of each battery cell 20 is parallel to the length direction of the battery 1100, so that the first side surface 23 (first surface 21) of each battery cell 20 is arranged opposite to the first side beam 121, and the first side surface 23 of the first battery cell 201 is arranged facing the first side beam 121.

[0275] In this embodiment, an insulating member 30 is provided between each of the two rows of first battery cells 201 and the corresponding first side beams 121 . The insulating member 30 can cover the first surfaces 21 of all corresponding first battery cells 201 , and the insulating member 30 is bonded to the first surfaces 21 of the first battery cells 201 .

[0276] In this embodiment, the insulating member 30 is a single-layer structure.

[0277] Example 2

[0278] The difference between this embodiment and the first embodiment is that: referring to Figures 9 and 10, the insulating member 30 includes a plurality of layers 31, and the plurality of layers 31 are stacked along a first direction, and the first direction is the distribution direction of the battery cells 20 and the first side beam 121; wherein the plurality of layers 31 include at least one of an elastic insulating layer and a hard insulating layer; and / or, the plurality of layers 31 include a heat-insulating insulating layer.

[0279] In this embodiment, the first direction may refer to the width direction of the battery 1100 . There are two layer bodies 31 , and the two layer bodies 31 cover the first surface 21 of the first battery cell 201 along the width direction of the battery 1100 .

[0280] Example 3

[0281] The difference between this embodiment and the first embodiment is that, as shown in FIG. 11 and FIG. 12 , a protrusion 32 is provided on the surface of the insulating member 30 facing the first side beam 121 .

[0282] In this embodiment, there are multiple protrusions 32 , which are spaced apart along the height direction of the first battery cell 201 . The protrusions 32 extend along the length direction of the battery 1100 , and are spaced apart evenly along the height direction of the battery cell 20 .

[0283] Example 4

[0284] This embodiment differs from the first embodiment in that a plurality of battery cells 20 in a row of battery cells 20 adjacent to the first side beam 121 are second-type battery cells 203 , and the other battery cells 20 are first-type battery cells 202 .

[0285] Example 5

[0286] This embodiment differs from the fourth embodiment in that a plurality of battery cells 20 in the two rows of battery cells 20 adjacent to the first side beam 121 are second-type battery cells 203 , and the other battery cells 20 are first-type battery cells 202 .

[0287] In other embodiments of the present application, referring to FIG. 1 , an electrical device is provided, including the battery 1100 as described in the above embodiment.

[0288] The electrical device of the embodiment of the present application adopts the above-mentioned battery 1100 , and the battery cell 20 has good reliability in use, thereby improving the reliability and service life of the battery 1100 .

[0289] In other embodiments of the present application, referring to FIG. 1 , FIG. 2 and FIG. 3 , the electrical device is a vehicle 1000 , and the first side beam 121 is located on a side of the first battery cell 201 facing a door of the vehicle 1000 .

[0290] Vehicle 1000 has a width direction and a length direction. The length direction of vehicle 1000 may refer to the distribution direction of the front and rear wheels of vehicle 1000, and the length direction of vehicle 1000 may refer to the direction indicated by arrow X2; the width direction of vehicle 1000 may refer to the distribution direction of the left and right wheels of vehicle 1000, and the width direction of vehicle 1000 may refer to the direction indicated by arrow Y2.

[0291] The doors of the vehicle 1000 may refer to doors of the vehicle 1000 for passengers, drivers to enter and exit, etc. The doors of the vehicle 1000 are generally located at the sides of the vehicle 1000 in the width direction.

[0292] The first side beam 121 is located on the side of the first battery cell 201 facing the door of the vehicle 1000. It can be understood that the first side beam 121 is located between the first battery cell 201 and the door of the vehicle 1000, and the first surface 21 of the first battery cell 201 is set toward the door of the vehicle 1000, and the insulating member 30 is located between the door of the vehicle 1000 and the first battery cell 201.

[0293] By adopting the technical solution of this embodiment, when the vehicle 1000 is hit by a side pole or is squeezed from the side, the first side beam 121 of the battery 1100 is mainly impacted; during the collision, the first surface 21 of the first battery cell 201 and the insulating member 30 simultaneously bear the impact. Since the first surface 21 allows much greater intrusion than other surfaces of the first battery cell 201, the risk of short circuiting after the first battery cell 201 is squeezed and deformed will be relatively low, which can greatly improve the safety of the battery 1100 in side pole collision and side squeeze conditions; in addition, during the collision, since the insulating member 30 is located between the first battery cell 201 and the insulating member 30, the insulating member 30 can also withstand a certain impact force. The insulating member 30 can protect the first battery cell 201, reduce the impact force on the battery cell 20, reduce the risk of short circuiting of the first battery cell 201, and further improve the safety of the battery 1100 in side pole collision and side squeeze conditions.

[0294] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0295] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: Comprising: A box body, including a first side beam and a second side beam, the first side beam and the second side beam are connected and enclose a receiving space; At least one battery cell, located within the receiving space, the battery cell adjacent to the first side beam is the first battery cell, the largest surface area of the first battery cell is the first surface, and the first surface of the first battery cell faces the first side beam; And An insulating member, located within the receiving space, and the insulating member is provided between the first battery cell and the first side beam.

2. The battery according to claim 1, wherein: The length of the first side beam is greater than the length of the second side beam.

3. The battery according to claim 1 or 2, characterized in that: One side of the insulating member abuts against the first battery cell, and / or the other side of the insulating member abuts against the first side beam.

4. The battery according to any one of claims 1 to 3, characterized in that: The insulating member is fixedly connected to the first battery cell and the first side beam.

5. The battery according to claim 4, characterized in that: One side of the insulating member is adhesively bonded to the first battery cell; and / or the other side of the insulating member is adhesively bonded to the first side beam.

6. The battery according to any one of claims 1 to 5, characterized in that: The insulating member is an elastic insulating member or a rigid insulating member; and / or the insulating member is a heat-insulating insulating member.

7. The battery according to any one of claims 1 to 6, characterized in that: The insulating member includes a plurality of layers, and the plurality of layers are stacked in a first direction, and the first direction is the distribution direction of the battery cell and the first side beam; Wherein, the plurality of layers include at least one of an elastic insulating layer and a rigid insulating layer; and / or the plurality of layers include a heat-insulating insulating layer.

8. The battery according to any one of claims 1 to 7, characterized in that: The surface of the insulating member facing the first side beam is provided with protrusions.

9. The battery according to claim 8, wherein: The number of the protrusions is multiple, and the multiple protrusions are arranged at intervals along the height direction of the first battery cell.

10. The battery according to any one of claims 1 to 9, characterized in that: The number of the first battery cells is multiple, and the multiple first battery cells are arranged in a second direction, and the second direction is parallel to the first surface: at least two of the first battery cells are connected to the insulating member.

11. The battery according to claim 10, characterized in that: The projection of the insulating member in the first direction at least partially overlaps with the projection of the first surfaces of at least two of the first battery cells in the first direction, and the first direction is perpendicular to the first surface.

12. The battery according to any one of claims 1 to 11, characterized in that: The first side beam is provided with a mounting structure for realizing the battery mounting.

13. The battery according to any one of claims 1 to 12, characterized in that: The number of the first side beams is two, the two first side beams are arranged oppositely, the battery cell is located between the two first side beams, and the insulating member is provided between one of the first side beams and the corresponding first battery cell, and the insulating member is provided between the other first side beam and the corresponding first battery cell.

14. The battery according to any one of claims 1 to 13, characterized in that: The number of the first battery cells is multiple, the multiple battery cells include a first type of battery cell and a second type of battery cell, at least the first battery cell is the second type of battery cell, and the energy density of the second type of battery cell is greater than the energy density of the first type of battery cell.

15. The battery according to claim 14, characterized in that: The first type of battery cell includes a sodium-ion battery cell, and the second type of battery cell includes a lithium-ion battery cell; Or, the first type of battery cell includes a lithium iron phosphate battery cell, and the second type of battery cell includes a ternary battery cell.

16. The battery according to any one of claims 1 to 15, characterized in that: The box body further includes a reinforcing beam, which is located in the accommodation space and divides the accommodation space into a first accommodation cavity and a second accommodation cavity, and the insulating member and the battery cell are located in the first accommodation cavity.

17. The battery according to claim 16, characterized in that: The battery further includes a control device for controlling the battery cell, and the control device is located in the second accommodation cavity.

18. The battery according to any one of claims 1 to 17, characterized in that: The box body further includes a sealing plate, which is located on one side of the first side beam and closes the opening on one side of the accommodation space.

19. The battery according to claim 18, wherein: The sealing plate is a heat exchange plate for exchanging heat with the battery cell.

20. The battery according to any one of claims 18 or 19, characterized in that: The box body further includes a box cover, which is located on the other side of the first side beam and closes the opening on the other side of the accommodation space.

21. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 20.

22. The electrical device according to claim 21, characterized in that: The electrical device is a vehicle, and the first side beam is located on the side of the first battery cell facing the vehicle door.

Images