Battery and electrical device

Abstract

Battery, characterized in that it comprises a battery assembly (20), wherein the battery assembly (20) comprises at least one battery cell (21), the battery assembly (20) is arranged along a first direction, wherein the first direction is the longitudinal direction of the battery (10) or the direction of movement of an electrical device (1) into which the battery (10) is installed; wherein the battery cell (21) comprises several surfaces, the several surfaces comprising a first surface (2111) with the largest surface area, wherein the several surfaces further comprise two opposing second surfaces (2121), the two second surfaces each being connected to the first surface, wherein the battery cell (21) further comprises a pressure relief mechanism (215), the pressure relief mechanism (215) being arranged on the first surface or one of the second surfaces (2121).

Description

TECHNICAL AREA The present application relates to the field of battery technology, in particular to a battery and an electrical device. BACKGROUND TECHNOLOGY In recent years, battery technology has become widespread in various sectors, particularly in the field of new energy vehicles, driven by economic developments. Currently, new energy vehicles are exerting significant pressure on traditional fuel-powered vehicles. As a core component of new energy vehicles, batteries play a crucial role in their development. The battery comprises multiple battery cells, each equipped with a pressure relief mechanism. If a collision or other factors cause an increase in internal pressure or temperature within a battery cell, high-pressure gas inside the cell can be vented to the outside via the pressure relief mechanism. However, due to its location, this mechanism is vulnerable to impacts during vehicle collisions, which can damage the mechanism, impairing battery functionality and posing safety risks. CONTENTS OF THE INVENTION In view of the shortcomings of the prior art, the present application aims to provide a battery and an electrical device that can effectively solve the problem of damage to the pressure relief mechanism in vehicle collisions. The first aspect of the present application reveals a battery comprising: A battery assembly, wherein the battery assembly comprises at least one battery cell, the battery assembly being arranged along a first direction, wherein the first direction is the longitudinal direction of the battery or the direction of movement of an electrical device into which the battery is installed; The battery cell comprises multiple surfaces, the multiple surfaces comprising a first surface with the largest surface area, the multiple surfaces further comprising two opposing second surfaces, the two second surfaces each being connected to the first surface, the battery cell further comprising a pressure relief mechanism, the pressure relief mechanism being arranged on the first surface or on one of the second surfaces. According to the application, if the pressure relief mechanism is located on the second surface, it can be arranged vertically or in alignment with the direction of movement of the electrical device. Therefore, if the electrical device experiences a lateral impact along its direction of movement, the pressure relief mechanism will not be affected, thus preventing damage and ensuring its proper functioning. If the pressure relief mechanism is located on the first surface, since the first surface has the largest area, it occupies a smaller proportion of that surface.Consequently, it is less likely that the pressure relief mechanism will be hit in the event of an impact on the electrical device, thus preventing damage to the pressure relief mechanism and ensuring its normal operation. In some embodiments of the present application, the two second surfaces are arranged opposite each other along the second direction, with the second direction intersecting the first direction. The second direction can be vertical, whereby the two second surfaces are arranged opposite each other along the vertical direction, i.e., the pressure relief mechanism is arranged along the vertical direction, thus ensuring that in the event of a collision along the lateral direction of movement, the electrical device does not collide with the pressure relief mechanism. In some embodiments of the present application, the two second surfaces are arranged opposite each other along the first direction. By arranging the two second surfaces opposite each other along the first direction, i.e., by arranging the pressure relief mechanism along the direction of movement of the electrical device, it is ensured that the electrical device does not collide with the pressure relief mechanism in the event of a collision along the lateral direction of movement. In some embodiments of the present application, the first surface intersects the horizontal plane. The first surface is the surface with the largest area of ​​the battery cell. By intersecting the first surface with the horizontal plane, the number of battery cells arranged within the horizontal plane can be maximized, thereby increasing the overall energy density of the battery. In some embodiments of the present application, the second direction intersects the horizontal plane or runs parallel to it. That is, the second direction can run essentially vertically or along the horizontal direction. The corresponding second surface can be arranged essentially along the horizontal direction or along the vertical direction. In some embodiments of the present application, a thermally conductive element is further provided, wherein the thermally conductive element is arranged along the first direction; the battery cell is thermally connected to the thermally conductive element via at least the first surface. The arrangement of the thermally conductive element along the first direction enables heat exchange with each battery cell within the battery assembly via the thermally conductive element. At the same time, in the event of a lateral impact on the electrical device, the force does not act directly on the end of the thermally conductive element, thus preventing damage to the thermally conductive element.Furthermore, the thermal connection of the battery cell with the heat-conducting element via the first surface maximizes the contact area between the heat-conducting element and the battery cell, thereby ensuring the heat exchange efficiency of the heat-conducting element with respect to the battery cell. In some embodiments of the present application, the battery comprises at least two battery assemblies, wherein both sides of the thermally conductive element are thermally connected to the two battery assemblies along a third direction, the third direction intersecting both the first direction and the first surface. The thermal connection of both sides of the thermally conductive element to the first surface of the battery cell improves the heat exchange efficiency between the thermally conductive element and the battery cell. In some embodiments of the present application, the longitudinal direction of the battery runs parallel to or intersects the direction of movement of the electrical device. The battery in the present application can be arranged in any direction within the device to facilitate its arrangement. In some embodiments of the present application, a heat exchanger channel is provided within the thermally conductive element. The heat exchanger channel serves to circulate a heat exchanger, thereby dissipating the heat emitted by the battery cell or heating the battery cell through the flow of the heat exchanger, thus improving the heat exchange efficiency of the battery cell. In some embodiments of the present application, the battery comprises several thermally conductive elements, wherein the multiple thermally conductive elements are arranged along the third direction, the third direction intersecting both the first direction and the first surface. By arranging multiple thermally conductive elements along the third direction, they collectively facilitate heat dissipation from the battery and thus effectively accelerate the heat exchange rate of the battery. In some embodiments of the present application, a heat-conducting element is arranged along the third direction on both sides of the battery assembly, the battery assembly being thermally connected to the heat-conducting elements arranged on both sides. Both sides of the battery assembly are simultaneously thermally connected to the heat-conducting elements, thus enabling heat dissipation through both sides of the battery assembly. This effectively improves the heat exchange rate of the battery. In some embodiments of the present application, the battery cell comprises two opposing first surfaces along the third direction, each of the two first surfaces of the battery cell being thermally connected to a heat-conducting element. If the battery cell has two first surfaces with the largest possible area, the simultaneous heat dissipation via both first surfaces effectively improves the heat exchange rate of the battery. In some embodiments of the present application, the battery cell comprises an electrode assembly, wherein the electrode assembly includes a main body section and an electrode tab projecting from the main body section, the electrode tab being electrically connected to the electrode terminal, wherein along the third direction the projections of the thermal element and the main body section overlap at least partially to form an overlap region, the third direction intersecting both the first direction and the first surface. By arranging the thermal element and the main body section such that they overlap at least partially along the third direction, the thermal element can effectively perform heat exchange with the main body section, thereby improving the heat exchange efficiency for the battery cell. In some embodiments of the present application, along the second direction, the dimension of the main body section L1 and the dimension of the heat-conducting element L2 are given by , where 0.5 ≤ L2 / L1 ≤ 1.5, and the first, second, and third directions intersect in pairs. By setting the L2 / L1 ratio to a range greater than 0.5 and less than 1.5, it is ensured that the heat-conducting element has a sufficient thermal contact area for heat exchange with the main body section, thereby significantly improving the heat transfer efficiency of the heat-conducting element to the main body section. In some embodiments of the present application, the dimension of the overlap region along the second direction is L3, where 0.5 ≤ L3 / L1 ≤ 1. By defining the dimension of the overlap region in the second direction, the heat exchange surface between the heat-conducting element and the main body section can be optimally configured, thereby significantly improving the heat exchange efficiency of the heat-conducting element to the main body section. In some embodiments of the present application, the battery further comprises a current collector, wherein the current collector is connected in fluid communication with several heat-conducting elements; One end of the heat-conducting element is equipped with a current collector in the first direction, or both ends of the heat-conducting element are each equipped with a current collector in the first direction. The current collector serves to supply or recover the heat exchanger within the heat exchanger channel, thereby facilitating heat exchange with the battery. Positioning the current collector at the end of the heat-conducting element along the first direction prevents the impact force from acting directly on the end of the heat-conducting element when the electrical device is subjected to a lateral collision. This prevents damage to the heat-conducting element and ensures the safety and reliability of battery operation. In some embodiments of the present application, two current collectors are provided, wherein the two current collectors are arranged at one end of the heat-conducting element in the first direction and the two current collectors are arranged along the second direction, the second direction intersecting both the first direction and the horizontal plane. By arranging both current collectors at one end along the first direction and along the second direction, the space occupied by the current collectors along the first direction within the battery is effectively reduced. This facilitates the integration of other structures into the battery and thereby increases the battery's energy density. Furthermore, arranging both current collectors at one end along the first direction reduces the likelihood of damage to the current collectors from impacts along the first direction. In some embodiments of the present application, the battery cell comprises electrode terminals, wherein the electrode terminal is at least one. The pressure relief mechanism and at least one electrode terminal are arranged on the same second surface, or alternatively, the pressure relief mechanism and the electrode terminal are each arranged on the two second surfaces. The pressure relief mechanism is internally connected to the battery cell and serves to vent the internal pressure of the battery cell when it increases.The pressure relief mechanism and the electrode connection can be arranged on the same second surface or on both second surfaces, as required, thus enabling the pressure relief mechanism to bypass the first surface where heat exchange with the heat-conducting element takes place, facilitating efficient venting of the pressure relief mechanism in the event of thermal runaway of the battery cell. In some embodiments of the present application, the electrode terminal comprises two electrode terminals of opposite polarity; the two electrode terminals can be arranged on a second surface or on each of the two second surfaces. The two electrode terminals of opposite polarity can be arranged on the same second surface or on each of the two second surfaces of the battery cell, as required, thereby facilitating the installation of the battery cell. In some embodiments of the present application, the battery cell comprises an electrode terminal, wherein the electrode terminal is arranged on the first surface. The arrangement of the electrode terminal on the first surface enables the power supply of electrical devices via the electrode terminal on the first surface. The arrangement of the electrode terminal on the first surface saves space in the battery, which is then occupied by the electrode terminal in the second direction, thereby increasing the energy density of the battery. In some embodiments of the present application, the battery cell comprises a first surface and a fourth surface arranged opposite the first surface, wherein the first surface and the fourth surface are arranged opposite each other along the third direction, the third direction intersecting the first direction and the first surface, the edge of the fourth surface being provided with a recess, the first surface being designed for accommodating the electrode terminal, the electrode terminal projecting from the first surface in the third direction and corresponding to the recess. By arranging the electrode terminal on the first surface and by providing a recess at the edge of the fourth surface corresponding to the electrode terminal, the recess accommodates the electrode terminal of adjacent battery cells.This creates operating space for electrical connections, resulting in a more compact overall battery structure with high space efficiency. In some embodiments of the present application, the multiple surfaces further comprise two third surfaces arranged opposite each other along the first direction, wherein the first direction, the second direction, and the third direction intersect in pairs, and the electrode terminal comprises two electrode terminals of opposite polarity, wherein the two electrode terminals are arranged on one third surface or the two electrode terminals are each arranged on both third surfaces. The two electrode terminals of opposite polarity are arranged, as required, on the same third surface of the battery cell or each on both third surfaces, thereby facilitating the installation of the battery cell. In some embodiments of the present application, the battery cell comprises an electrode assembly, wherein the electrode assembly has a wound structure and is flat, the outer surface of the electrode assembly comprising two flat planes, the two flat planes being opposite each other along the third direction; The electrode assembly may have a laminated structure, wherein a first electrode plate, a separating film and a second electrode plate of the electrode assembly are stacked along the third direction; The third direction intersects both the first direction and the first surface. By arranging the electrode assembly as a laminated or wound structure, both arrangements can effectively supply power to electrical devices via the electrode assembly. In some embodiments of the present application, the battery assembly comprises at least two battery cells, wherein the at least two battery cells are arranged along the first direction. By arranging at least two battery cells along the first direction, the heat transfer element can be positioned along the first direction if heat exchange for the battery cell is required. This facilitates separate heat exchange for at least two battery cells within the battery assembly, thereby improving the heat exchange rate of the heat transfer element. In some embodiments of the present application, the maximum dimension of the battery cell is L along the first direction and the maximum dimension of the battery cell is H along the second direction, with the ratio of L / H being in the range of 0.5 to 6, the second direction intersecting both the first direction and the horizontal plane. Configuring the battery cell according to the aforementioned dimensional ratios maximizes the battery cell's capacity while simultaneously ensuring its structural integrity. In some embodiments of the present application, the maximum dimension of the battery cell D along the third direction is given by the range L / D 1 to 30, where the first, second, and third directions intersect in pairs. Configuring the battery cell according to the aforementioned dimensional ratios maximizes the battery cell's capacity while simultaneously ensuring its structural integrity. In some embodiments of the present application, the electrode connection and the pressure relief mechanism are arranged on a second surface, the battery comprising a support plate, the battery cell being rigidly connected to the support plate via another second surface not provided with an electrode connection, the second direction intersecting both the first direction and the horizontal plane. The battery cell is connected to the support plate at one end without an electrode connection, thereby securing it in the box to facilitate installation and fastening of the battery cell. In some embodiments of the present application, the second surface is firmly bonded to the support plate via a first bonding layer, wherein the thermally conductive element is thermally bonded to the first surface via a second bonding layer, the thermal conductivity coefficient of the first bonding layer being less than or equal to the thermal conductivity coefficient of the second bonding layer. Since the first bonding layer serves to bond the second surface and the support plate, while the second bonding layer establishes a thermal connection between the first surface and the thermally conductive element, the thermal conductivity coefficient of the first bonding layer is adjusted to be less than or equal to the thermal conductivity coefficient of the second bonding layer. This ensures more effective heat exchange for the battery cell via the thermally conductive element. In some embodiments of the present application, the ratio of the thermal conductivity coefficient of the first adhesion layer to the thermal conductivity coefficient of the second adhesion layer is in the range of 0.1 to 1. If the configuration is carried out according to the above-mentioned ratio, effective heat exchange of the battery cell via the thermally conductive element can be achieved. The second aspect of the present application provides an electrical device comprising one of the aforementioned batteries, wherein the battery is designed to supply electrical energy to power the electrical device for movement. In some embodiments of the present application, the first direction designates the direction of movement of the electrical device when the longitudinal direction of the battery differs from the direction of movement of the electrical device. By configuring the first direction as the direction of movement of the electrical device, the electrode terminal can be arranged vertically or in alignment with the direction of movement of the electrical device when the pressure relief mechanism is located on the second surface. Therefore, should the electrical device experience a lateral impact along its direction of movement, the electrode terminal will not be struck, thus preventing damage to the electrode terminal and ensuring proper power supply to the battery.If the electrode terminal is located on the first surface, since the first surface has the largest area, the electrode terminal occupies a smaller proportion of the first surface. Consequently, it is less likely that the electrode terminal will be struck in the event of an impact on the electrical device, thus preventing damage to the electrode terminal and ensuring proper battery power supply. The foregoing description merely provides an overview of the technical solutions of the present application. To facilitate a clearer understanding of the technical means employed herein, implementation can be carried out in accordance with the content of the description. To make the aforementioned and other objectives, features, and advantages of the present application clearer and more comprehensible, specific embodiments of the present application are described below. FIGURESAfter reading the detailed description of the preferred embodiments, various other advantages and benefits will become apparent to the person skilled in the art. The figures serve solely to illustrate the preferred embodiments and should not be interpreted as limiting the scope of the present application. In the figures, identical reference numerals denote identical components. In the figures: Fig. 1 is a schematic representation of the structure of a vehicle in an embodiment of the present application; Fig. 2 is a schematic exploded view of the structure of a battery in an embodiment of the present application; Fig. 3 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; Fig. 4 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Fig.Figure 5 is a schematic exploded view of the structure of a battery cell in an embodiment of the present application; Figure 6 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Figure 7 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Figure 8 is a schematic representation of the structure of a battery in an embodiment of the present application; Figure 9 is a schematic exploded view of the structure of a battery in an embodiment of the present application; Figure 10 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; Figure 11 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; FigureFigure 12 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; Figure 13 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Figure 14 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; Figure 15 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Figure 16 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Figure 17 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; Figure 18 is a schematic representation of the structure of a battery assembly in an embodiment of the present application; FigureFigure 19 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Figure 20 is a schematic representation of the structure of a heat-conducting element in an embodiment of the present application; Figure 21 is a schematic representation of the structure of a second section in an embodiment of the present application; Figure 22 is a schematic representation of the assembly structure of a second section with the battery assembly in an embodiment of the present application; Figure 23 is a schematic representation of the enlarged structure of section A in an embodiment of the present application; Figure 24 is a schematic representation of the sectional structure of BB in an embodiment of the present application; Figure 25 is a schematic representation of the enlarged structure of section C in an embodiment of the present application; FigureFigure 26 is a schematic representation of the internal structure of a second section in an embodiment of the present application; Figure 27 is a schematic representation of the enlarged structure of section D in an embodiment of the present application; Figure 28 is a schematic representation of the distribution structure of a battery in the electrical device in an embodiment of the present application. The reference numerals in the specific embodiments are as follows: 1. Vehicle; 10. Battery; 11. Control unit; 12. Motor; 20. Battery assembly; 21. Battery cell; 211. Housing; 2111. First surface; 2112. Third surface; 212. Cover plate; 2121. Second surface; 213. Electrode assembly; 2131. Main body section; 2132. Electrode tab; 214. Electrode terminal; 215. Pressure relief mechanism; 30. Box; 31. First section; 311. Support plate; 32. Second section; 321. Protective plate; 40. Thermally conductive element; 50. Current collector; 61. First adhesion layer; 62. Second adhesion layer. SPECIFIC EXECUTION FORMS The embodiments of the technical solutions of the present application are now described in detail with reference to the figures. The following embodiments serve only to describe the technical solution of the present application more clearly; therefore, they should be considered only as examples and not as limiting the scope of protection of the present application. It should be noted that, unless otherwise specified, the technical or scientific terms used in the embodiments of the present application have the ordinary meaning understood by persons skilled in the art in the field of the embodiments of the present application. In the description of the embodiments of the present application, it should be noted that terms such as "center", "longitudinal direction", "horizontal direction", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial" and "circumferential" denote an orientation or positional relationship based on the orientation or positional relationship shown in the figures and serve only to facilitate and simplify the description of the embodiments of the application and do not mean that the device or element in question must have a specific orientation, be constructed and function in a specific orientation and therefore should not be understood as a limitation of the embodiments of the application. Furthermore, the technical terms “first” and “second”, etc., are used for descriptive purposes only and are not to be understood as implying a relative meaning or an implicit determination of the number of specified technical features. In the description of the embodiments of the present application, “multiple” means at least more than two, unless expressly and specifically limited otherwise. In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," "attached," "fastened," etc., are to be understood in the broadest sense unless expressly stated otherwise and limited, e.g., they may be a fixed connection, a detachable connection, or an integral connection; they may also be a mechanical connection or an electrical connection; they may be a direct connection or an indirect connection via an intermediate medium, a connection within two elements, or an interaction between two elements. The specific meanings of the aforementioned terms in the embodiments of the present application can be understood by general technical personnel in this field according to the specific situations. In the description of the embodiments of the present application, the first feature “on” or “below” the second feature can be direct contact between the first and the second feature or indirect contact between the first and the second feature via an intermediate medium, unless expressly stated and limited otherwise. Furthermore, the first feature that is “above,” “above,” and “on” the second feature includes the first feature being directly or diagonally above the second feature, or simply indicating that the first feature is horizontally higher than the second feature. The first feature that is “below,” “below,” and “under” the second feature includes the first feature being directly or diagonally below the second feature, or simply indicating that the first feature is horizontally lower than the second feature. Current market trends indicate an increasingly widespread use of traction batteries. These batteries are not only used in energy storage systems for hydroelectric, thermal, wind, and solar power plants, but also extensively in electric transportation vehicles such as e-bikes, e-motorcycles, and electric cars, as well as in military equipment, aerospace, and several other sectors. Lithium-ion batteries, in particular, have found widespread application in mobile and portable electronic devices due to their high energy density, high average open-circuit voltage, and long lifespan. The inventor of the present application has determined that the battery comprises several battery cells, each equipped with a pressure relief mechanism. If a vehicle collision or other factors cause an increase in the internal pressure or temperature within a battery cell, high-pressure gas inside the cell can be vented to the outside of the cell via the pressure relief mechanism. However, due to the position of the pressure relief mechanism, it is susceptible to impacts during vehicle collisions, which can lead to damage. If the high-pressure gas cannot be effectively vented from the battery cell, this can cause further damage to the battery and pose safety risks. To solve the problem of damage to electrode connections in vehicle collisions, the inventors of this application, after extensive research, have developed a battery comprising a battery assembly, wherein the battery assembly comprises at least one battery cell, the battery assembly is arranged along a first direction, wherein the first direction is the longitudinal direction of the battery or the direction of movement of an electrical device into which the battery is installed, wherein the battery cell comprises multiple surfaces, the multiple surfaces comprising a first surface with the largest surface area, wherein the multiple surfaces further comprise two opposing second surfaces arranged along the second direction, the second direction intersecting the first direction, wherein the battery cell further comprises a pressure relief mechanism, the pressure relief mechanism being arranged on the first surface or on one of the second surfaces.According to the battery of the present application, the pressure relief mechanism is located on the second surface. Since the two second surfaces are arranged opposite each other along the second direction, and the second direction intersects the first direction, meaning that the pressure relief mechanism is not located at the end in the longitudinal direction of the battery or at the end in the direction of movement of the electrical device, the pressure relief mechanism is not affected when the electrical device experiences an impact along its direction of movement. This prevents damage to the pressure relief mechanism and ensures its proper functioning. If the pressure relief mechanism were located on the first surface, it would occupy a smaller proportion of the first surface, as the first surface is the largest.Consequently, it is less likely that the pressure relief mechanism will be hit in the event of an impact on the electrical device, thus preventing damage to the pressure relief mechanism and ensuring its normal operation. The present application discloses a battery and an electrical device containing this battery, wherein the battery can be used in various electrical devices that use batteries, such as mobile phones, portable devices, laptops, electric bicycles, electric toys, power tools, electric vehicles, watercraft, and spacecraft; spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft. The battery serves to supply the aforementioned electrical devices with electrical energy. It is understood that the technical solutions described in the embodiments of this application are not limited to the batteries and electrical devices mentioned above, but can also be applied to all batteries with a casing and electrical devices that use such batteries. For the sake of brevity, however, the following embodiments are described using electric vehicles as examples. Fig. 1 is a schematic representation of the structure of a vehicle 1 in some embodiments of the present application. Fig. 2 is a schematic exploded view of the structure of a battery 10 in one embodiment of the present application. Fig. 3 is a schematic representation of the structure of a battery assembly 20 in one embodiment of the present application. As shown in Figs. 1, 2 to 3, the vehicle 1 can be a gasoline-powered vehicle, a gas-powered vehicle, or a new energy vehicle. New energy vehicles can include, among others, pure electric vehicles, hybrid vehicles, or range-extended vehicles. A battery 10 is arranged inside the vehicle 1; the battery 10 can be located at the bottom, at the front, or at the rear of the vehicle 1.The battery 10 can be used to supply power to the vehicle 1; for example, the battery 10 can serve as the operating power source for the vehicle 1. The vehicle 1 can also include a control unit 11 and a motor 12, with the control unit 11 serving to control the power supply to the motor 12 from the battery 10, for example, for starting, navigation, and operation of the vehicle 1 while driving. In some embodiments of the present application, the battery 10 can not only be used as an operating current source for the vehicle 1, but can also be used as a drive current source for the vehicle 1 in order to provide the drive power for the vehicle 1 instead of or partially instead of fuel or natural gas. To meet varying current requirements, the battery 10 can comprise multiple battery cells 21. A battery cell 21 refers to the smallest unit comprising a battery assembly 20 or a battery pack. Multiple battery cells 21 can be connected in series and / or parallel via electrode terminals for various application scenarios. The battery 10 referred to in the present application is a battery pack. Multiple battery cells 21 can be connected in series, parallel, or in mixed configurations, where "mixed" denotes a combination of series and parallel connections. In embodiments of the present application, multiple battery cells 21 can directly form a battery pack or first form a battery assembly 20, with the battery assembly 20 subsequently forming the battery pack. As shown in Figures 2 and 3, the battery 10 can comprise several battery assemblies 20 and a box 30, the several battery assemblies 20 being housed in the box 30. The box 30 is designed to accommodate the battery cell 21 or the battery assembly 20, thereby preventing liquids or other foreign substances from interfering with the charging or discharging of the battery cell 21. The box 30 can be a simple three-dimensional structure such as a single cuboid, a cylinder, or a sphere, or it can be a complex three-dimensional structure formed by combining such simple three-dimensional structures as cuboids, cylinders, or spheres, and the embodiment of this application does not restrict this in any way.The material of box 30 can be alloy materials such as aluminium alloys or iron alloys, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber reinforced epoxy resin, and the embodiment of this application is not limited in this respect. In some embodiments, the box 30 can comprise a first section 31 and a second section 32, the first section 31 and the second section 32 being superimposed on each other. Together, the first section 31 and the second section 32 form a space for receiving the battery cell 21. The second section 32 can be a hollow structure open at one end, while the first section 31 can be a plate-like structure. The first section 31 overlaps the open side of the second section 32, so that the first section 31 and the second section 32 together form a space for receiving the battery cell 21; alternatively, both the first section 31 and the second section 32 can be hollow structures with one open side, the open side of the first section 31 overlapping the open side of the second section 32. The battery assembly 20 can comprise multiple battery cells 21. These multiple battery cells 21 can first be connected in series, parallel, or in a mixed configuration to form the battery assembly 20. Multiple battery assemblies 20 can then be connected in series, parallel, or in a mixed configuration to form the battery 10. The battery cell 21 can be cylindrical, flat, rectangular, or have another shape, and the embodiment of this application is not limited in this respect. The battery cell 21 generally comprises cylindrical cells, square cells, softpack cells, and cells with a multi-prismatic cross-section, and the embodiment of this application is not limited in this respect. However, for the sake of simplicity, the following embodiments are described using a square lithium-ion battery cell 21 as an example. Fig. 4 is a schematic representation of the structure of a battery cell 21 in one embodiment of the present application; Fig. 5 is a schematic exploded view of the structure of a battery cell 21 in one embodiment of the present application. Fig. 6 is a schematic representation of the structure of a battery cell in some embodiments of the present application. Fig. 7 is a schematic representation of the structure of a battery cell in some embodiments of the present application. A battery cell 21 is the smallest unit of which the battery 10 consists. As shown in Figs. 4, 5, 6 to 7, the battery cell 21 comprises an end cap 212, a housing 211, and an electrode assembly 213. The end cap 212 is the component that overlaps the opening of the housing 211 to insulate the interior of the battery cell 21 from the external environment. The shape of the end cap 212 can correspond to the shape of the housing 211 without restriction in order to fit into the housing 211. Optionally, the end cap 212 can be made of a material that has a certain degree of hardness and strength (e.g., an aluminum alloy). This ensures that the end cap 212 is less prone to deformation under pressure or impact, thus giving the battery cell 21 greater structural strength and improved safety performance. Functional components such as electrode terminals 214 can be arranged on the end cap 212. The electrode terminals 214 can be used to establish electrical connections with the electrode assembly 213 to output or input electrical energy from the battery cell 21.In some embodiments, a pressure relief mechanism 215 may also be arranged on the end cap 212 to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. In some embodiments, an insulating element may additionally be provided on the inside of the end cap 212. This insulating element serves to isolate the electrical connection components within the housing 211 from the end cap 212, thereby reducing the risk of short circuits. For example, the insulating element may be made of plastic, rubber, or similar materials. The housing 211 is a component designed to interact with the end cap 212 to form the internal environment of the battery cell 21, the internal environment being used to accommodate the electrode assembly 213, the electrolyte (not shown), and other components. The housing 211 and the end cap 212 can be separate components, with the housing 211 having an opening. The end cap 212 overlaps the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 212 and the housing 211 can be formed as a single piece. In particular, the end cap 212 and the housing 211 can initially form a common interface before other components are accommodated. If sealing of the interior of the housing 211 is required, the housing 211 is overlapped by the end cap 212.The housing 211 can have various shapes and dimensions, for example, rectangular, cylindrical, hexagonal prism, etc. In particular, the shape of the housing 211 can be determined according to the specific shape and dimensions of the electrode assembly 213. The material of the housing 211 can be of various types, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of this application does not restrict this in any way. The electrode assembly 213 is a component within the battery cell 21 in which electrochemical reactions take place. The interior of the housing 211 can contain one or more electrode assemblies 213. The electrode assembly 213 is primarily formed by winding or stacking positive and negative electrode plates, typically with a separating film between the positive and negative electrode plates. The portion of the positive and negative electrode plates containing active material forms the main body section of the electrode assembly 213, while the portions of the positive and negative electrode plates without active material form the respective electrode tabs (not shown).The positive electrode tab and the negative electrode tab can be arranged together at one end of the main body section or at each end of the main body section. During charging and discharging of the battery, the positive active materials and negative active materials react with the electrolyte, while the electrode tabs are connected to the electrode terminal 214 to form an electrical circuit. Fig. 8 is a schematic representation of the structure of a battery 10 in an embodiment of the present application; Fig. 9 is a schematic exploded view of the structure of a battery 10 in an embodiment of the present application. As shown in Figs. 3, 4, 5, 6, 7, 8 to 9.As shown in Figure 9, in some embodiments of the present application, the battery 10 comprises a battery assembly 20, wherein the battery assembly 20 comprises at least one battery cell 21, the battery assembly 20 is arranged along a first direction, wherein the first direction is the longitudinal direction of the battery 10 or the direction of movement of an electrical device in which the battery 10 is installed, wherein the battery cell 21 comprises several surfaces, the several surfaces comprising a first surface 2111 with the largest surface area, wherein the several surfaces further comprise two opposing second surfaces 2121 along the second direction, the second direction intersecting the first direction and the horizontal plane, wherein the battery cell 21 further comprises a pressure relief mechanism 215, the pressure relief mechanism 215 being arranged on the first surface 2111 or one of the second surfaces 2121. In particular, as shown in Figures 1, 3, 4, and 9, the battery cell 21 can be a square battery cell 21 in some embodiments of the present application. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the first direction, two second surfaces 2121 arranged opposite each other along the second direction, and further comprises two third surfaces 2112 arranged opposite each other along the third direction. The pressure relief mechanism 215 is arranged on the second surface 2121. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. The second direction corresponds to the vertical direction, and the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. If the pressure relief mechanism 215 is located on the second surface 2121, i.e., if the pressure relief mechanism 215 is located along the vertical direction, a lateral impact occurring along the direction of movement of the electrical device 1 does not affect the pressure relief mechanism 215. This prevents damage to the pressure relief mechanism 215 and ensures its normal operation. As shown in Figures 1, 3, 7, and 9, the battery cell 21 in some embodiments of the present application can be a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the first direction, two second surfaces 2121 arranged opposite each other along the second direction, and further comprises two third surfaces 2112 arranged opposite each other along the third direction. The pressure relief mechanism 215 is arranged on the first surface 2111. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. The second direction corresponds to the vertical direction, and the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. When the pressure relief mechanism 215 is located on the first surface 2111, it occupies a relatively small portion of the first surface 2111, since the first surface 2111 has the largest area. Consequently, the pressure relief mechanism 215 is less likely to be struck by the electrical device 1 in the event of an impact, thus preventing damage to the pressure relief mechanism 215 and ensuring its normal operation. Fig. 10 is a schematic representation of the structure of a battery assembly 20 in an embodiment of the present application. As shown in Figs. 1, 4, 9 and 10, in some embodiments of the present application the battery cell 21 is a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the third direction, two second surfaces 2121 arranged opposite each other along the second direction, and further comprises two third surfaces 2112 arranged opposite each other along the first direction. The pressure relief mechanism 215 is arranged on the second surface 2121. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1.The second direction corresponds to the vertical direction, the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. If the pressure relief mechanism 215 is located on the second surface 2121, i.e., if the pressure relief mechanism 215 is located along the vertical direction, a lateral impact occurring along the direction of movement of the electrical device 1 does not affect the pressure relief mechanism 215. This prevents damage to the pressure relief mechanism 215 and ensures its normal operation. As shown in Figures 1, 7, 9, and 10, in some embodiments of the present application, the battery cell 21 is a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the third direction, two second surfaces 2121 arranged opposite each other along the second direction, and further comprises two third surfaces 2112 arranged opposite each other along the first direction. The pressure relief mechanism 215 is arranged on the first surface 2111. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. The second direction corresponds to the vertical direction, and the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. When the pressure relief mechanism 215 is located on the first surface 2111, it occupies a relatively small portion of the first surface 2111, since the first surface 2111 has the largest area. Consequently, the pressure relief mechanism 215 is less likely to be struck by the electrical device 1 in the event of an impact, thus preventing damage to the pressure relief mechanism 215 and ensuring its normal operation. Fig. 11 is a schematic representation of the structure of a battery assembly 20 in an embodiment of the present application. As shown in Figs. 1, 4, 9 and 11, in some embodiments of the present application the battery cell 21 is a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the second direction, two second surfaces 2121 arranged opposite each other along the first direction, and further comprises two third surfaces 2112 arranged opposite each other along the third direction. The pressure relief mechanism 215 is arranged on the second surface 2121. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1.The second direction corresponds to the vertical direction, the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. If the pressure relief mechanism 215 is located on the second surface 2121, i.e., if the pressure relief mechanism 215 is located at the end of the battery 10 along the longitudinal direction or at the end of the electrical device 1 along the direction of movement, a lateral impact occurring along the direction of movement of the electrical device 1 will not affect the pressure relief mechanism 215. This prevents damage to the pressure relief mechanism 215 and ensures its normal operation. Fig. 12 is a schematic representation of the structure of a battery assembly 20 in an embodiment of the present application; Fig. 13 is a schematic representation of the structure of a battery cell 21 in an embodiment of the present application. As shown in Figs. 1, 9, 12, and 13, in some embodiments of the present application, the battery cell 21 is a cylindrical battery cell 21, with at least two battery cells 21 arranged along the first direction to form a battery assembly 20. The battery cell 21 comprises a cylindrical first surface 2111 and two second surfaces 2121 arranged opposite each other along the second direction. The pressure relief mechanism 215 is arranged on the second surface 2121. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. The second direction corresponds to the vertical direction. If the pressure relief mechanism 215 is located on the second surface 2121, i.e., if the pressure relief mechanism 215 is located along the vertical direction, a lateral impact occurring along the direction of movement of the electrical device 1 does not affect the pressure relief mechanism 215. This prevents damage to the pressure relief mechanism 215 and ensures its normal operation. Fig. 14 is a schematic representation of the structure of a battery assembly 20 in an embodiment of the present application; Fig. 15 is a schematic representation of the structure of a battery cell in an embodiment of the present application; Fig. 16 is a schematic representation of the structure of a battery cell in an embodiment of the present application. As shown in Figs. 1, 9, 14, 15, and 16, in some embodiments of the present application, the battery cell 21 is a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the third direction, two second surfaces 2121 arranged opposite each other along the first direction, and further comprises two third surfaces 2112 arranged opposite each other along the second direction. The pressure relief mechanism 215 is arranged on the second surface 2121.The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. The second direction corresponds to the vertical direction, the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. If the pressure relief mechanism 215 is located on the second surface 2121, i.e., if the pressure relief mechanism 215 is located at the end of the battery 10 along the longitudinal direction or at the end of the electrical device 1 along the direction of movement, a lateral impact occurring along the direction of movement of the electrical device 1 will not affect the pressure relief mechanism 215. This prevents damage to the pressure relief mechanism 215 and ensures its normal operation. Fig. 17 is a schematic representation of the structure of a battery assembly in one embodiment of the present application. As shown in Figs. 1, 9, 15, and 17, in some embodiments of the present application, the battery cell 21 is a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the second direction, two second surfaces 2121 arranged opposite each other along the first direction, and further comprises two third surfaces 2112 arranged opposite each other along the third direction. The pressure relief mechanism 215 is arranged on the second surface 2121. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. The second direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1.The third direction corresponds to the vertical direction. If the pressure relief mechanism 215 is located on the second surface 2121, i.e., if the pressure relief mechanism 215 is located at the end of the battery 10 along the longitudinal direction or at the end of the electrical device 1 along the direction of movement, a lateral impact occurring along the direction of movement of the electrical device 1 will not affect the pressure relief mechanism 215. This prevents damage to the pressure relief mechanism 215 and ensures its normal operation. Fig. 18 is a schematic representation of the structure of a battery assembly in one embodiment of the present application; Fig. 19 is a schematic representation of the structure of a battery cell in one embodiment of the present application. As shown in Figs. 1, 9, 18, and 19, in some embodiments of the present application, the battery cell 21 is a square battery cell 21. The battery cell 21 comprises two first surfaces 2111 arranged opposite each other along the third direction, two second surfaces 2121 arranged opposite each other along the second direction, and further comprises two third surfaces 2112 arranged opposite each other along the first direction. The pressure relief mechanism 215 is arranged on the first surface 2111. The first direction corresponds to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1.The second direction corresponds to the vertical direction, the third direction corresponds to the lateral direction of the battery 10 or the lateral direction of the electrical device 1. When the pressure relief mechanism 215 is located on the first surface 2111, it occupies a relatively small portion of the first surface 2111, since the first surface 2111 has the largest area. Consequently, the pressure relief mechanism 215 is less likely to be struck by the electrical device 1 in the event of an impact, thus preventing damage to the pressure relief mechanism 215 and ensuring its normal operation. According to the battery 10 of the present application, the pressure relief mechanism 215 can be arranged vertically or in alignment with the direction of movement of the electrical device 1 when the pressure relief mechanism 215 is located on the second surface 2121. Therefore, should the electrical device 1 experience a lateral impact along its direction of movement, the pressure relief mechanism 215 will not be struck, thus preventing damage to the pressure relief mechanism 215 and ensuring the proper power supply to the battery 10. If the pressure relief mechanism 215 is located on the first surface 2111, since the first surface 2111 has the largest area, the pressure relief mechanism 215 occupies a smaller proportion of the first surface 2111.Consequently, it is less likely that the pressure relief mechanism 215 will be struck by the electrical device 1 upon impact, thus preventing damage to the pressure relief mechanism 215 and ensuring the proper power supply to the battery 10. As shown in Fig. 3 and Fig. 4, the first surface 2111 in some embodiments of the present application intersects the horizontal plane. In particular, in some embodiments of the present application, the first surface 2111 may be arranged in a vertical direction. As shown in Fig. 4 and Fig. 10, the first surface 2111 in some embodiments of the present application intersects the horizontal plane. As shown in Fig. 12 and Fig. 13, the first surface 2111 in some embodiments of the present application intersects the horizontal plane. As shown in Fig. 14 and Fig. 15, the first surface 2111 in some embodiments of the present application intersects the horizontal plane. As shown in Fig. 18 and Fig. 19, the first surface 2111 in some embodiments of the present application intersects the horizontal plane. Since the first surface 2111 is the surface with the largest area of ​​the battery cell 21, the number of battery cells 21 arranged within the horizontal plane can be maximized by intersecting the first surface 2111 with the horizontal plane, thereby increasing the overall energy density of the battery 10. Fig. 20 is a schematic representation of the structure of a thermally conductive element 40 in an embodiment of the present application. As shown in Figs. 4, 9, 10 and 20, in some embodiments of the present application a thermally conductive element 40 is further provided, wherein the thermally conductive element 40 is arranged along the first direction; each battery cell 21 of the battery assembly 20 is thermally connected to the thermally conductive element 40 via at least the first surface 2111. In particular, the thermally conductive element 40 enables a thermal connection with the battery cell 21, thereby facilitating heat exchange for the battery cell 21 by transferring the thermal energy of the battery cell 21 to the thermally conductive element 40. This heat exchange for the battery cell 21 comprises either cooling and dissipation of heat from the battery cell 21 or heating of the battery cell 21. The thermally conductive element 40 can be a thermally conductive plate, a thermally conductive adhesive, or a thermally conductive structure. In some embodiments, the thermally conductive plate can be a metal plate, such as copper or aluminum, or other materials with favorable thermal conductivity. In some embodiments, the thermally conductive element can also have an internal cavity. In some embodiments of the present application, the thermally conductive element 40 is a thermally conductive plate.Since the first surface 2111 is thermally connected to the heat-conducting element 40 and the first surface 2111 intersects the horizontal plane, the heat-conducting element 40 also intersects the horizontal plane. In some embodiments of the present application, the heat-conducting element 40 is arranged in a vertical direction and extends along the first direction. As shown in Fig. 4, Fig. 9, Fig. 10 and Fig. 20, the heat-conducting element 40 is arranged along the first direction and intersects the horizontal plane, with the battery cell 21 being thermally connected to the heat-conducting element 40 via a first surface 2111. As shown in Fig. 9, Fig. 12, Fig. 13 and Fig. 20, in some embodiments of the present application the thermally conductive element 40 is arranged along the first direction and intersects the horizontal plane, wherein the battery cell 21 is thermally connected to the thermally conductive element 40 via a first surface 2111. As shown in Fig. 9, Fig. 18, Fig. 19 and Fig. 20, in some embodiments of the present application the thermally conductive element 40 is arranged along the first direction and intersects the horizontal plane, wherein the battery cell 21 is thermally connected to the thermally conductive element 40 via a first surface 2111. The arrangement of the thermally conductive element 40 along the first direction enables heat exchange with each battery cell 21 within the battery assembly 20 via the thermally conductive element 40. Simultaneously, the force exerted upon a lateral impact on the electrical device 1 does not act directly on the end of the thermally conductive element 40. Furthermore, the thermal connection of the battery cell 21 with the thermally conductive element 40 via the first surface 2111 maximizes the contact area between the thermally conductive element 40 and the battery cell 21, thereby ensuring the heat exchange efficiency of the thermally conductive element 40 with respect to the battery cell 21. Fig. 21 is a schematic representation of the structure of a second section 32 in an embodiment of the present application; Fig. 22 is a schematic representation of the assembly structure of a second section 32 with the battery assembly 20 in an embodiment of the present application; Fig. 23 is a schematic representation of the enlarged structure of section A in an embodiment of the present application. As shown in Figs. 4, 10, 21, 22 and 23, the battery 10 in some embodiments of the present application comprises at least two battery assemblies 20, wherein both sides of the heat-conducting element 40 are thermally connected to the two battery assemblies 20 along a third direction, the third direction intersecting both the first direction and the first surface 2111. In particular, the thermally conductive element 40 is positioned between two battery assemblies 20 and is thermally connected to each of them. Here, the third direction denotes the lateral direction of the battery 10 or the lateral direction relative to the direction of movement of the electrical device 1. The thermal connection of both sides of the thermally conductive element 40 with the first surface 2111 of the battery cell 21 improves the heat exchange efficiency between the thermally conductive element 40 and the battery cell 21. As shown in Figs. 12, 13, 21, 22 and 23, the battery 10 in some embodiments of the present application comprises at least two battery assemblies 20, wherein both sides of the heat-conducting element 40 are thermally connected to the two battery assemblies 20 along a third direction, the third direction intersecting both the first direction and the first surface 2111. As shown in Fig. 1 and Fig. 22, in some embodiments of the present application the longitudinal direction of the battery 10 runs parallel to or intersects the direction of movement of the electrical device 1. In particular, in some embodiments of the present application, the longitudinal direction of the battery 10 can be arranged parallel to the direction of movement of the electrical device 1. If the heat-conducting element 40 is arranged along the longitudinal direction of the battery 10, then the two ends of the heat-conducting element 40 are each located at the two ends of the battery 10 along the longitudinal direction, i.e., at the two ends of the power-consuming device 1, closely aligned with the direction of movement. If the electrical device 1 is subjected to a collision along the side, the impact force does not act directly on the end of the heat-conducting element 40. This prevents damage to the heat-conducting element 40 and ensures the safety and reliability of the battery 10. In some embodiments of the present application, the longitudinal direction of the battery 10 can alternatively be aligned at an angle relative to the direction of movement of the electrical device 1. This configuration also allows the battery 10 to supply power to the electrical device 1, thus simplifying the arrangement of the battery 10's position. As shown in Figs. 20, 21, 22 to 23, in some embodiments of the present application a heat exchange medium channel is provided within the heat-conducting element 40. The heat exchanger channel serves to circulate a heat exchanger, thereby dissipating the heat emitted by the battery cell 21 or heating the battery cell 21 through the flow of the heat exchanger, thus improving the heat exchange efficiency of the battery cell 21. The heat exchanger can be a heat exchange fluid, in particular an oil- or water-based fluid. Fig. 24 is a schematic representation of the sectional structure of BB in an embodiment of the present application; Fig. 25 is a schematic representation of the enlarged structure of section C in an embodiment of the present application. As shown in Figs. 4, 10, 23, 24 and 25, the battery 10 in some embodiments of the present application comprises several thermally conductive elements 40, the several thermally conductive elements 40 being arranged along the third direction, the third direction intersecting both the first direction and the first surface 2111. As shown in Figs. 12, 13, 22, 23, 24 and 25, the battery 10 in some embodiments of the present application comprises several thermally conductive elements 40, wherein the several thermally conductive elements 40 are arranged along the third direction, the third direction intersecting both the first direction and the first surface 2111. As shown in Figs. 18, 19, 22, 23, 24 and 25, the battery 10 in some embodiments of the present application comprises several thermally conductive elements 40, wherein the several thermally conductive elements 40 are arranged along the third direction, the third direction intersecting both the first direction and the first surface 2111. In particular, the first direction corresponds to the longitudinal direction of the battery 10, while the third direction corresponds to the lateral direction of the battery 10. By arranging the multiple heat-conducting elements 40 along the third direction and establishing thermal connections between multiple heat-conducting elements 40 and the first surface 2111 of the battery cell 21, the heat dissipation of the battery 10 is facilitated, thereby effectively improving the heat exchange rate of the battery 10. As shown in Figs. 4, 10, 22, 23, 24 and 25, in some embodiments of the present application a heat-conducting element 40 is arranged along the third direction on both sides of the battery assembly 20, wherein the battery assembly 20 is thermally connected to the heat-conducting elements 40 arranged on both sides. As shown in Figs. 12, 13, 22, 23, 24 and 25, in some embodiments of the present application a heat-conducting element 40 is arranged along the third direction on both sides of the battery assembly 20, wherein the battery assembly 20 is thermally connected to the heat-conducting elements 40 arranged on both sides. As shown in Figs. 14, 15, 22, 23, 24 and 25, in some embodiments of the present application a heat-conducting element 40 is arranged along the third direction on both sides of the battery assembly 20, wherein the battery assembly 20 is thermally connected to the heat-conducting elements 40 arranged on both sides. As shown in Figs. 18, 19, 22, 23, 24 and 25, in some embodiments of the present application a heat-conducting element 40 is arranged along the third direction on both sides of the battery assembly 20, wherein the battery assembly 20 is thermally connected to the heat-conducting elements 40 arranged on both sides. Both sides of the battery assembly 20 are simultaneously thermally connected to the heat-conducting elements 40, thus enabling heat dissipation through both sides of the battery assembly 20. This effectively improves the heat exchange rate of the battery 1. As shown in Fig. 4, Fig. 10, Fig. 22, Fig. 23, Fig. 24 and Fig. 25, in some embodiments of the present application, the battery cell 21 comprises two opposing first surfaces 2111 along the third direction, each of the two first surfaces 2111 of the battery cell 21 being thermally connected to a heat-conducting element 40. As shown in Figs. 14, 15, 22, 23, 24 and 25, in some embodiments of the present application, the battery cell 21 comprises two opposing first surfaces 2111 along the third direction, each of the two first surfaces 2111 of the battery cell 21 being thermally connected to a heat-conducting element 40. If the battery cell 21 has two first surfaces 2111 with the largest area, the simultaneous heat dissipation via both first surfaces 2111 effectively improves the heat exchange rate of the battery 10. As shown in Figs. 4, 5, 10, 24 and 25, the battery cell 21 in some embodiments of the present application comprises an electrode assembly 213, wherein the electrode assembly 213 comprises a main body section 2131 and an electrode tab 2132 projecting from the main body section 2131, the electrode tab 2132 being electrically connected to the electrode terminal 214, wherein along the third direction the projections of the heat-conducting element 40 and the main body section 2131 overlap at least partially, the third direction intersecting both the first direction and the first surface 2111. In particular, the heat-conducting element 40 extends along the first direction and is arranged along the side of the battery cell 21 along the third direction. Specifically, the first direction corresponds to the longitudinal direction of the battery cell 21, while the third direction corresponds to the lateral direction of the battery cell 21. As shown in Figs. 12, 13, 24 and 25, in some embodiments of the present application, the battery cell 21 comprises an electrode assembly 213, wherein the electrode assembly 213 comprises a main body section 2131 and an electrode tab 2132 projecting from the main body section 2131, the electrode tab 2132 being electrically connected to the electrode terminal 214, wherein along the third direction the projections of the heat-conducting element 40 and the main body section 2131 overlap at least partially, the third direction intersecting both the first direction and the first surface 2111. In particular, the heat-conducting element 40 extends along the first direction and is arranged along the side of the battery cell 21 along the third direction. Specifically, the first direction corresponds to the direction of movement of the electrical device 1, while the third direction corresponds to the radial direction of the battery cell 21. As shown in Figs. 14, 15, 22, 23, 24 and 25, the battery cell 21 in some embodiments of the present application comprises an electrode assembly 213, wherein the electrode assembly 213 comprises a main body section 2131 and an electrode tab 2132 projecting from the main body section 2131, the electrode tab 2132 being electrically connected to the electrode terminal 214, wherein along the third direction the projections of the heat-conducting element 40 and the main body section 2131 overlap at least partially, the third direction intersecting both the first direction and the first surface 2111. In particular, the heat-conducting element 40 extends along the first direction and is arranged along the side of the battery cell 21 along the third direction. Specifically, the first direction corresponds to the longitudinal direction of the battery cell 21, while the third direction corresponds to the lateral direction of the battery cell 21. As shown in Figs. 18, 19, 24 and 25, in some embodiments of the present application, the battery cell 21 comprises an electrode assembly 213, wherein the electrode assembly 213 comprises a main body section 2131 and an electrode tab 2132 projecting from the main body section 2131, the electrode tab 2132 being electrically connected to the electrode terminal 214, wherein along the third direction the projections of the heat-conducting element 40 and the main body section 2131 overlap at least partially, the third direction intersecting both the first direction and the first surface 2111. In particular, the heat-conducting element 40 extends along the first direction and is arranged along the side of the battery cell 21 along the third direction. Specifically, the first direction corresponds to the direction of movement of the electrical device 1, while the third direction corresponds to the lateral direction of the electrical device 1. The heat-conducting element 40 can effectively perform heat exchange with the main body section by arranging the heat-conducting element 40 and the main body section so that they overlap at least partially along the second direction, thereby improving the heat exchange efficiency for the battery 10. As shown in Fig. 4, Fig. 5, Fig. 10, Fig. 24 and Fig. 25, in some embodiments of the present application, along the second direction, the dimension of the main body section is 2131 L1 and the dimension of the heat-conducting element is 40 L2, where 0.5 ≤ L2 / L1 ≤ 1.5, the first direction, second direction and third direction intersect in pairs. In particular, the first direction corresponds to the longitudinal direction of battery cell 21, while the second direction corresponds to the vertical direction of battery cell 21. As shown in Fig. 12, Fig. 13, Fig. 24 and Fig. 25, in some embodiments of the present application, along the second direction, the dimension of the main body section is 2131 L1 and the dimension of the heat-conducting element is 40 L2, where 0.5 ≤ L2 / L1 ≤ 1.5, the first direction, second direction and third direction intersect in pairs. In particular, the first direction corresponds to the direction of movement of the electrical device 1, while the second direction corresponds to the vertical direction of the battery cell 21. As shown in Figs. 14, 15, 22, 23, 24 and 25, in some embodiments of the present application, along the second direction, the dimension of the main body section is 2131 L1 and the dimension of the heat-conducting element is 40 L2, where 0.5 ≤ L2 / L1 ≤ 1.5, the first direction, second direction and third direction intersect in pairs. In particular, the first direction corresponds to the longitudinal direction of battery cell 21, while the second direction corresponds to the vertical direction of battery cell 21. As shown in Figs. 18, 19, 24 and 25, in some embodiments of the present application, along the second direction, the dimension of the main body section is 2131 L1 and the dimension of the heat-conducting element is 40 L2, where 0.5 ≤ L2 / L1 ≤ 1.5, the first direction, second direction and third direction intersect in pairs. In particular, the first direction corresponds to the longitudinal direction of battery cell 21, while the second direction corresponds to the vertical direction of battery cell 21. By setting the L2 / L1 ratio to a range greater than 0.5 and less than 1.5, it is ensured that the thermally conductive element 40 has a sufficient thermal contact area for heat exchange with the main body section 2131, thereby significantly improving the heat transfer efficiency of the thermally conductive element 40 to the main body section 2131. It is understood that if the L2 / L1 value is less than 0.5, the heat-conducting element 40 is too small, preventing effective heat exchange with the battery cell 21; conversely, if the L2 / L1 value is greater than 1.5, the heat-conducting element 40 becomes excessively large, taking up space inside the battery 10 and thus hindering improvements in the space utilization of the battery 10. It should be noted that in some embodiments of the present application the value of L2 / L1 may be 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4 ... 1.5. As shown in Fig. 4, Fig. 5, Fig. 10, Fig. 24 and Fig. 25, in some embodiments of the present application, the dimension of the overlap area L3 along the second direction is where 0.5 ≤ L3 / L1 ≤ 1. By defining the dimensions of the overlap area in the second direction, the heat exchange surface between the heat-conducting element 40 and the main body section 2131 can be optimally configured, thereby significantly improving the heat exchange efficiency of the heat-conducting element 40 to the main body section 2131. It is understood that if the L3 / L1 value is less than 0.5, the overlap area between the thermally conductive element 40 and the main body section 2131 becomes too small. This leads to a reduced heat exchange efficiency of the thermally conductive element 40 to the battery cell 21, which means that sufficient heat dissipation for the battery cell 21 cannot be effectively ensured. It should be noted that in some embodiments of the present application the value of L3 / L1 may be 0.5, 0.6, 0.7, 0.8, 0.9 ... 1. As shown in Figs. 22 and 23, in some embodiments of the present application the battery 10 further comprises a current collector 50, wherein the current collector 50 is connected in fluid connection with several heat-conducting elements 40; Where one end of the heat-conducting element 40 is provided with a current collector 50 in the first direction, or both ends of the heat-conducting element 40 are each provided with a current collector 50 in the first direction. The current collector 50 serves to supply or recover the heat exchange medium within the heat exchange medium channel, thereby facilitating heat exchange with the battery 10. In particular, the current collector 50 is arranged at one end of the battery 10 along its longitudinal direction or at the end of the electrical device 1 along its direction of movement, since several heat-conducting elements 40 are arranged along the longitudinal direction of the battery 10 or along the direction of movement of the electrical device 1 to facilitate fluid communication between the current collector 50 and the several heat-conducting elements 40. Depending on practical requirements, the current collector 50 can be arranged at one end or at both ends. By arranging the current collector 50 at the end of the heat-conducting element 40 along the first direction, the impact force is prevented from acting directly on the current collector 50 at the end of the electrical device 1 along the direction of movement when the electrical device 1 is subjected to a collision along the side. This prevents damage to the current collector 50 and ensures the safety and reliability of the battery 10. As shown in Figs. 22 and 23, in some embodiments of the present application two current collectors 50 are provided, wherein the two current collectors 50 are arranged at one end of the heat-conducting element 40 in the first direction and the two current collectors 50 are arranged along the second direction, the second direction intersecting both the first direction and the horizontal plane. In particular, in some embodiments of the present application, the second direction can be the vertical direction, wherein the two current collectors 50 are spaced apart from each other along the vertical direction. The two current collectors 50 can each serve as an inlet current collector and an outlet current collector. By arranging both current collectors 50 at one end along the first direction and along the second direction, the space occupied by the current collectors 50 along the first direction within the battery 10 is effectively reduced. This facilitates the integration of other structures into the battery 10 and thereby increases the battery's energy density. Furthermore, arranging both current collectors at one end along the first direction reduces the probability of damage to the current collectors from impacts along the first direction. As shown in Fig. 4 and Fig. 10, in some embodiments of the present application, the battery cell 21 comprises an electrode connection 214, wherein at least one electrode connection 214 is provided, wherein the pressure relief mechanism 215 and at least one electrode connection 214 are arranged on the same second surface 2121 or the pressure relief mechanism 215 and the electrode connection 214 are each arranged on both second surfaces 2121. In particular, as shown in Figs. 4 and 10, the pressure relief mechanism 215 and the two electrode terminals 214 are arranged together along the second direction on the same second surface 2121, the second direction being the vertical direction. In some embodiments of the present application, the pressure relief mechanism 215 is arranged along the second direction on a second surface 2121, while the two electrode terminals 214 are each arranged along the second direction on another second surface 2121, or alternatively, the two electrode terminals 214 are each arranged along the second direction on both second surfaces 2121, with the pressure relief mechanism 215 being arranged together with one of the electrode terminals 214 on one of the second surfaces 2121. As shown in Figs. 12 and 13, an electrode connection 214 is arranged protrudingly on one of the second surfaces 2121, wherein the pressure relief mechanism 215 is arranged together with the protrudingly arranged electrode connection 214 on the second surface 2121, or alternatively, an electrode connection 214 is arranged protrudingly on one of the second surfaces 2121, while the pressure relief mechanism 215 is arranged on a second surface 2121 which does not have a protrudingly arranged electrode connection 214. As shown in Figures 14 and 15, the two electrode terminals 214 are each arranged along the first direction on the two second surfaces 2121. The pressure relief mechanism 215 is arranged together with one of the electrode terminals 214 on one of the second surfaces, the first direction corresponding to the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. Alternatively, the pressure relief mechanism 215 can be arranged along the first direction on a second surface 2121, with the two electrode terminals 214 together arranged along the first direction on the other second surface 2121, or the two electrode terminals 214 and the pressure relief mechanism 215 can be arranged together on one of the second surfaces 2121. The pressure relief mechanism 215 is internally connected to the battery cell 21 and serves to vent the internal pressure of the battery cell 21 when it increases. The pressure relief mechanism 215 and the electrode connection 214 can be arranged on the same second surface 2121 or on both second surfaces 2121, as required. This allows the pressure relief mechanism 215 to bypass the first surface 2111, where heat exchange with the heat-conducting element 40 takes place, thus facilitating efficient venting of the pressure relief mechanism 215 in the event of thermal runaway of the battery cell 21. As shown in Fig. 3 and Fig. 4, in some embodiments of the present application, the electrode terminal 214 comprises two electrode terminals 214 with opposite polarity; the two electrode terminals 214 can be arranged on a second surface 2121 or the two electrode terminals 214 can each be arranged on both second surfaces. In particular, as shown in Figures 3 and 4, the battery cell 21 comprises two electrode terminals 214, and the two electrode terminals 214 are arranged together along the second direction on the same second surface 2121. The second direction can be the vertical direction. In some embodiments of the present application, the two electrode terminals 214 can also each be arranged on both second surfaces 2121. As shown in Figs. 4 and 10, the battery cell 21 comprises two electrode terminals 214, and the two electrode terminals 214 are arranged together along the second direction on the same second surface 2121. The second direction can be the vertical direction. In some embodiments of the present application, the two electrode terminals 214 can also be arranged on each of the second surfaces 2121. As shown in Figs. 4 and 11, the battery cell 21 comprises two electrode terminals 214, and the two electrode terminals 214 are arranged together along the first direction on the same second surface 2121. Here, the first direction denotes the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. In some embodiments of the present application, the two electrode terminals 214 can also each be arranged on both second surfaces 2121. As shown in Figs. 12 and 13, the battery cell 21 comprises two electrode terminals 214, wherein the two electrode terminals 214 are arranged along the second direction on both second surfaces 2121, with one electrode terminal 214 being flush with the end face of the battery cell 21, so that the end of the battery cell 21 forms the electrode terminal 214. The second direction is the vertical direction. As shown in Figs. 14 and 15, the battery cell 21 comprises two electrode terminals 214, wherein the two electrode terminals 214 are arranged along the first direction on both second surfaces 2121. Here, the first direction denotes the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. Alternatively, the two electrode terminals 214 can each be arranged on both second surfaces 2121. As shown in Figs. 15 and 17, the battery cell 21 comprises two electrode terminals 214, wherein the two electrode terminals 214 are arranged along the first direction on both second surfaces 2121. Here, the first direction denotes the longitudinal direction of the battery 10 or the direction of movement of the electrical device 1. Alternatively, the two electrode terminals 214 can each be arranged on both second surfaces 2121. By arranging the two electrode terminals 214 with opposite polarity, as required, either on the same second surface 2121 of the battery cell 21 or on both second surfaces 2121, the electrode terminals 214 are spaced away from the first surface 2111, which exchanges heat with the thermally conductive element 40. This facilitates the subsequent electrical connection with other adjacent battery cells 21. As shown in Fig. 1, Fig. 18 and Fig. 19, in some embodiments of the present application the electrode connection 214 is arranged on the first surface 2111. In particular, the battery cell 21 comprises two electrode terminals 214, both of which are arranged together on the first surface 2111. The longitudinal direction of the battery cell 21 is oriented along the first direction, and the battery cell 21 comprises two first surfaces 2111 that are arranged opposite each other along the third direction, with both electrode terminals 214 being arranged together on one of the first surfaces 2111. Here, the first direction denotes the horizontal direction. By arranging the electrode terminals 214 on the first surface 2111, space is saved which the battery 10 has occupied along the second direction, thereby increasing the energy density of the battery 10. As shown in Figs. 18 and 19, in some embodiments of the present application, the battery cell 21 comprises a first surface 2111 and a fourth surface arranged opposite the first surface 2111, wherein the first surface 2111 and the fourth surface are arranged opposite each other along the third direction, the third direction intersecting the first direction and the first surface 2111, the edge of the fourth surface being provided with a recess, the first surface 2111 being designed for arranging the electrode terminal 214, the electrode terminal 214 projecting from the first surface 2111 in the third direction and corresponding to the recess. In particular, as shown in Figs. 1, 18 and 19, the longitudinal direction of the battery cell 21 is aligned along a first direction. The battery cell 21 comprises a first surface 2111 and a fourth surface arranged opposite each other along the third direction, the edge of the fourth surface having a recess; the first surface 2111 is used for arranging the electrode terminal 214. By arranging the electrode connection 214 on the first surface 2111 and by providing a recess at the edge of the fourth surface corresponding to the electrode connection 2111, the recess accommodates the electrode connection 214 of adjacent battery cells 21. This creates operating space for electrical connections, resulting in a more compact overall structure of the battery 10 with high space efficiency. As shown in Figures 1, 6, and 10, the multiple surfaces in some embodiments of the present application further comprise two third surfaces 2112 arranged opposite each other along the first direction, wherein the first direction, the second direction, and the third direction intersect in pairs, and the electrode connection 214 comprises two electrode connections 214 with opposite polarity; the two electrode connections 214 are each arranged on one of the two third surfaces 2112. In some embodiments of the present application, the two electrode connections 214 may also be arranged together on the same third surface 2112. As shown in Figures 1, 14, and 16, the multiple surfaces in some embodiments of the present application further comprise two third surfaces 2112 arranged opposite each other along the second direction, wherein the first direction, the second direction, and the third direction intersect in pairs, and the electrode connection 214 comprises two electrode connections 214 with opposite polarity; the two electrode connections 214 are each arranged on one of the two third surfaces 2112. In some embodiments of the present application, the two electrode connections 214 may also be arranged together on the same third surface 2112. The two electrode terminals 214 with opposite polarity can be arranged on the same third surface 2112 or on each of the second third surfaces 2112 of the battery cell 21, as required, which facilitates the installation of the battery cell 21. As shown in Figs. 4, 5 and 10, in some embodiments of the present application, the battery cell 21 comprises an electrode assembly 213, wherein the electrode assembly 213 has a wound structure and is flat, the outer surface of the electrode assembly 213 comprises two flat planes, the two planes being opposite each other along the third direction, or wherein the electrode assembly 213 may have a laminated structure, wherein a first electrode plate, a separating film and a second electrode plate of the electrode assembly 213 are stacked along the third direction; the third direction intersects both the first direction and the first surface. By arranging the electrode assembly 213 as a laminated structure or as a wound structure, both arrangements can effectively supply electrical devices 1 with power via the electrode assembly 213. As shown in Fig. 3, Fig. 4 and Fig. 9, in some embodiments of the present application the battery assembly 20 comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. As shown in Fig. 4, Fig. 9 and Fig. 10, in some embodiments of the present application the battery assembly 20 comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. As shown in Figures 4, 9 and 11, the battery assembly 20 in some embodiments of the present application comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. It should be noted that in Figure 11 only one battery cell 21 is shown along the first direction. As shown in Fig. 9, Fig. 12 and Fig. 13, in some embodiments of the present application the battery assembly 20 comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. As shown in Figures 9, 14 and 15, the battery assembly 20 in some embodiments of the present application comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. It should be noted that in Figure 14 only one battery cell 21 is shown along the first direction. As shown in Figures 9, 15 and 17, the battery assembly 20 in some embodiments of the present application comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. It should be noted that in Figure 17 only one battery cell 21 is shown along the first direction. As shown in Figures 9, 18 and 19, the battery assembly 20 in some embodiments of the present application comprises at least two battery cells 21, wherein the at least two battery cells 21 are arranged along the first direction. It should be noted that in Figure 18 only one battery cell 21 is shown along the first direction. As shown in Fig. 4, Fig. 10, Fig. 12, Fig. 13, Fig. 18 and Fig. 19, in some embodiments of the present application the maximum dimension of the battery cell 21 L along the first direction and the maximum dimension of the battery cell 21 H along the second direction, wherein the ratio of L / H is in the range of 0.5 to 6. When the battery cell 21 is as shown in Fig. 4 or Fig. 19, L / H has a maximum size ratio of 6; when the battery cell 21 is as shown in Fig. 13, L / H has a minimum size ratio of 0.5. If the L / H ratio exceeds 6, the battery cell 21 will have excessive dimensions along the first direction, making installation more difficult and simultaneously reducing the structural strength of the battery cell 21. If the L / H ratio falls below 0.5, the battery cell 21 will have excessive dimensions along the second direction, making installation more difficult and simultaneously reducing the structural strength of the battery cell 21. It should be noted that the L / H value can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4...5, 5.5...6. By setting different L / H values, the battery cell 21 can be configured with different shapes to meet the requirements of various battery 10 models. The maximum dimension H of the battery cell 21 includes both the dimension of the housing 211 and the dimension of the electrode terminal 214 protruding from the housing 211. The configuration of the battery cell 21 according to the above-mentioned dimensional ratios maximizes the capacity of the battery cell 21 and simultaneously ensures the structural integrity of the battery cell 21, while facilitating the installation of the battery cell 21. As shown in Fig. 4, Fig. 10, Fig. 12, Fig. 13, Fig. 18 and Fig. 19, in some embodiments of the present application the maximum dimension of the battery cell 21 D along the third direction is, wherein the range is from L / D 1 to 30, the first direction, the second direction and the third direction intersect in pairs. If the L / D ratio exceeds 30, the battery cell 21 will have excessive dimensions along the first direction, making installation more difficult and simultaneously reducing the supporting strength of the battery cell 21. If the L / D ratio falls below 1, the battery cell 21 will have excessively small dimensions along the first direction, thus reducing the capacity of the battery cell 21. It should be noted that the L / D value can be 1, 2, 3, 4, 5, 6, 7, 8...10...15...20...25...28...30. By setting different L / D values, the battery cell 21 can be configured with different shapes to meet the requirements of various battery 10 models. When the battery cell 21 is configured as shown in Fig. 4 or Fig. 17, the L / D ratio has a maximum of 30; when the battery cell 21 is configured as shown in Fig. 11, the L / D ratio has a minimum of 1. Configuring the battery cell 21 according to the above-mentioned dimensional ratios maximizes the capacity of the battery cell 21 while simultaneously ensuring the structural integrity of the battery cell 21. Fig. 26 is a schematic representation of the internal structure of a second section 32 in an embodiment of the present application; Fig. 27 is a schematic representation of the enlarged structure of section D in an embodiment of the present application. As shown in Figs. 4, 10, 24, 25, 26 and 27, the battery 10 in some embodiments of the present application further comprises a protective plate 321, wherein the protective plate 321 is arranged along the second direction opposite the second surface 2121 of the battery cell 21 provided with the electrode terminal 214, wherein the distance between the electrode terminal 214 and the protective plate 321 is 1.2 mm to 25 mm, the second direction intersecting the first direction and the horizontal plane. In particular, the protective plate 321 can form part of the structure of the box 30 itself, or the protective plate 321 can be connected to the box 30 and arranged inside the box 30. The second direction can be the vertical direction. As shown in Figs. 12, 13, 24, 25, 26 and 27, in some embodiments of the present application, the battery 21 further comprises a protective plate 321, wherein the protective plate 321 is arranged along the second direction opposite the second surface 2121 of the battery cell 21 provided with the electrode connection 214 arranged above, wherein the distance between the electrode connection 214 and the protective plate 321 is 1.2 mm to 25 mm, the second direction intersecting the first direction and the horizontal plane. If the distance between the electrode terminal 214 and the protective plate 321 is less than 1.2 mm, the electrode terminal 214 tends to collide with the protective plate, which can lead to damage to the electrode terminal 214. If the distance between the electrode terminal 214 and the protective plate 321 exceeds 25 mm, the battery 10 becomes excessively large, which hinders the installation and configuration of the battery 10. Adjusting the distance between the protective plate 321 and the electrode terminal 214 to between 1.2 mm and 25 mm prevents a collision between the protective plate 321 and the electrode terminal 214 when the battery 10 is subjected to an impact along the second direction, thus preventing damage to the electrode terminal 214. It should be noted that the distance between the protective plate 321 and the electrode connection 214 can be 1.2, 1.5, 1.8, 2, 3, 4, 5, 6, 7, 8...10...15...20...23, 24, 25 mm. As shown in Figs. 1, 4, 10, 24, 25, 26 and 27, in some embodiments of the present application at least one electrode connection 214 is arranged below the battery cell 21, with the protective plate 321 located below the electrode connection 214; or alternatively at least one electrode connection 214 is arranged above the battery cell 21, with the protective plate 321 located above the electrode connection 214. In particular, the electrode terminal 214 and the protective plate 321 are arranged together along the second direction, with the protective plate 321 located below the battery cell 21. That is, the protective plate 321 is located closer to the second section 32 relative to the electrode terminal 214. The second direction can be the vertical direction, with both electrode terminals 214 being arranged together below the battery cell 21, or one of them being located below the battery cell 21 while the other is located above the battery cell 21. Alternatively, the electrode terminal 214 and the protective plate 321 are arranged together along the second direction, with the protective plate 321 being located above the battery cell 21. That is, the protective plate 321 is located closer to the first section 31 relative to the electrode terminal 214.In this configuration, both electrode terminals 214 can be arranged together above the battery cell 21, or one can be arranged below the battery cell 21 while the other is arranged above the battery cell 1. As shown in Figs. 1, 12, 13, 24, 25, 26 and 27, in some embodiments of the present application the electrode connection 214 arranged above is located below the battery cell 21, with the protective plate 321 located below the electrode connection 214; or alternatively, the electrode connection 214 arranged above is located above the battery cell 21, with the protective plate 321 located above the electrode connection 214. By arranging the protective plate 321 either below the electrode terminal 214 along the second direction or above the electrode terminal 214 along the second direction, a suitable arrangement can be achieved according to the actual installation position. As shown in Figs. 4, 9, 10, 24 and 25, in some embodiments of the present application the electrode connection 214 and the pressure relief mechanism 215 are arranged on a second surface 2121, wherein the battery 10 comprises a support plate 311, wherein the battery cell 21 is firmly connected to the support plate 311 via another second surface 2121, which is not provided with an electrode connection 214, the second direction intersecting both the first direction and the horizontal plane. In particular, the support plate 311 can form part of the structure of the box 30 itself, or the support plate 311 can be connected to the box 30 and arranged inside the box 30. The support plate 311 can be arranged either on the first section 31 or the second section 32. As shown in Figs. 4, 10, 24 and 25, both electrode terminals 214 can be arranged together along the second direction on one of the second surfaces 2121 of the battery cell 21. The other second surface 2121, which does not have any electrode terminals 214, is fixedly connected to the support plate 311, thereby securing the battery cell 21 within the box 30. As shown in Fig. 12, Fig. 13, Fig. 24 and Fig. 25, the electrode connection 214 is arranged protruding on one of the second surfaces 2121, while the other second surface 2121 is firmly connected to the support plate 311 without a protruding electrode connection 214. The battery cell 21 is attached via the support plate 311 inside the box 30 in order to install and secure the battery cell 21. As shown in Figs. 4, 10, 24 and 25, in some embodiments of the present application the other second surface 2121 is firmly connected to the support plate 311 via a first adhesion layer 61, wherein the heat-conducting element 40 is thermally connected to the first surface 2111 via a second adhesion layer 62, the thermal conductivity coefficient of the first adhesion layer 61 being less than or equal to the thermal conductivity coefficient of the second adhesion layer 62. In particular, the surface without the electrode connection 214 is firmly connected to the support plate 311 via the first adhesion layer 61. As shown in Figures 12, 13, 24, and 25, in some embodiments of the present application, the second surface 2121, which does not have projecting electrode terminals 214, is firmly connected to the support plate 311 via the first adhesion layer 61, with the thermally conductive element 40 being thermally connected to the first surface 2111 via a second adhesion layer 62. The first adhesion layer 61 and the second adhesion layer 62 can each comprise thermally conductive polyurethane adhesion layers, with different proportions of thermally conductive particles being incorporated to achieve different thermal conductivity coefficients. Since the first adhesion layer 61 serves to bond the second surface 2121 and the support plate 311, while the second adhesion layer 62 establishes a thermal connection between the first surface 2111 and the thermally conductive element 40, the thermal conductivity coefficient of the first adhesion layer 61 is adjusted to be less than or equal to the thermal conductivity coefficient of the second adhesion layer 62. This ensures more effective heat exchange for the battery cell 21 via the thermally conductive element 40. As shown in Figs. 24 and 25, in some embodiments of the present application the ratio of the thermal conductivity coefficient of the first adhesion layer 61 to the thermal conductivity coefficient of the second adhesion layer 62 is in the range of 0.1 to 1. In particular, effective heat exchange of the battery cell 21 via the heat-conducting element 40 can be achieved if the configuration is in accordance with the above-mentioned ratio. It is understood that the thermal conductivity of the first adhesion layer 61 is poor if the ratio of its thermal conductivity coefficient to that of the second adhesion layer 62 is less than 0.1. Consequently, the support plate 311 bonded to the first adhesion layer 61 cannot transfer heat through one side of the first adhesion layer 61, thus preventing heat exchange for the support plate 311. Conversely, the thermal conductivity of the first adhesion layer 61 exceeds the thermal conductivity of the second adhesion layer 62 if the ratio of their thermal conductivity coefficients is greater than 1. This reduces the ability of the battery cell 21 to exchange heat via the thermally conductive element 40 and consequently impairs the heat exchange efficiency of the battery cell 21. It should be noted that the ratio of the thermal conductivity coefficient of the first adhesion layer 61 to the thermal conductivity coefficient of the second adhesion layer 62 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 ... 1. As shown in Figs. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 to 27, the second aspect of the present application provides an electrical device 1 comprising one of the aforementioned batteries 10, the battery 10 being designed to supply electrical energy for powering the electrical device 1 for movement. Fig. 28 is a schematic representation of the distribution structure of a battery 10 in the electrical device 1 in an embodiment of the present application. As shown in Figs. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 to 28, in some embodiments of the present application, the first direction denotes the direction of movement of the electrical device 1 when the longitudinal direction of the battery 10 differs from the direction of movement of the electrical device 1. In some embodiments, the longitudinal direction of the battery 10 can be perpendicular to the direction of movement of the electrical device 1. For example, one or more batteries 10 can be arranged along the direction of movement of the electrical device 1. If several batteries 10 are arranged, the longitudinal direction of at least one battery 10 is perpendicular to the direction of movement of the electrical device 1. In this embodiment, the first direction denotes the direction of movement of the electrical device 1. That is, for the battery 10 whose longitudinal direction is perpendicular to the direction of movement of the electrical device 1, the battery assembly 20 and the heat-conducting element 40 are arranged along the lateral direction of the battery 10, corresponding to the direction of movement of the electrical device 1. The electrical device 1 in the present application may be, for example, a mobile phone, a portable device, a laptop, an electric bicycle, an electric toy, a power tool, an electric vehicle, a watercraft or a spacecraft; spacecraft include, for example, airplanes, rockets, space shuttles and spacecraft. The first direction is set as the direction of movement of the electrical device 1, and since the pressure relief mechanism 215 is located on the second surface 2121, and since the two second surfaces 2121 are arranged opposite each other along the second direction and the second direction intersects the first direction, i.e., the pressure relief mechanism 215 is not located at the end in the direction of movement of the electrical device 1, the pressure relief mechanism 215 will not be struck if the electrical device 1 experiences an impact along its direction of movement, thus preventing damage to the pressure relief mechanism 215 and ensuring the proper functioning of the pressure relief mechanism 215.When the pressure relief mechanism 215 is located on the first surface 2111, it occupies a smaller proportion of the first surface 2111, since the first surface 2111 is the largest. Consequently, the pressure relief mechanism 215 is less likely to be struck by the electrical device 1 in the event of an impact, thus preventing damage to the pressure relief mechanism 215 and ensuring its normal operation. The foregoing description merely provides an overview of the technical solutions of the present application. To facilitate a clearer understanding of the technical means employed herein, implementation can be carried out in accordance with the content of the description. To make the aforementioned and other objectives, features, and advantages of the present application clearer and more comprehensible, specific embodiments of the present application are described below. As shown in Figures 1, 4, 5, 9, 10 and 20 to 27, the electrical device 1 in one embodiment of the present application comprises a battery 10, the battery 10 being designed to supply electrical energy for powering the electrical device 1 for movement. The battery 10 comprises a box 30 and several battery assemblies 20 arranged within the box 30. The box 30 comprises a first section 31 and a second section 32, the first section 31 and second section 32 together enclosing a space for receiving the battery assembly 20. The several battery assemblies 20 are each arranged along a first direction and aligned along a third direction. The battery assembly 20 comprises several battery cells 21.The longitudinal direction of battery cell 21 is arranged along the first direction, the vertical direction of battery cell 21 is arranged along the second direction, and the horizontal direction of battery cell 21 is arranged along the third direction. Battery cell 21 comprises two third surfaces 2112 arranged opposite each other along the first direction, two second surfaces 2121 arranged opposite each other along the second direction, and two first surfaces 2111 arranged opposite each other along the third direction, with the first surface 2111 being the surface with the largest area of ​​battery cell 21. The first direction corresponds to the direction of movement of the electrical device 1, with the longitudinal direction of battery 21 being parallel to the direction of movement of the electrical device 1.The second direction is the vertical direction and the third direction is the lateral direction of the movement of the electrical device 1. The battery cell 21 comprises an electrode assembly 213, wherein the electrode assembly 213 includes a main body section 2131 and an electrode tab 2132 projecting from the main body section 2131, the electrode tab 2132 being electrically connected to the electrode terminal 214, wherein along the third direction the projections of the thermally conductive element 40 and the main body section 2131 overlap at least partially to form an overlap region. Along the second direction, the dimension of the main body section 2131 is L1, the dimension of the thermally conductive element 40 is L2, and the dimension of the overlap region is L3, where 0.5 ≤ L2 / L1 ≤ 1.5 and 0.5 ≤ L3 / L1 ≤ 1. The battery cell 21 comprises two electrode terminals 214 with opposite polarity; the two electrode terminals 214 are arranged on a second surface 2121. The battery cell 21 further comprises a pressure relief mechanism 215; the pressure relief mechanism 215 and the two electrode terminals 214 are arranged on the same second surface 2121. Along the first direction, the maximum dimension of the battery cell 21 is L, and along the second direction, the maximum dimension of the battery cell 21 is H, with the L / H ratio ranging from 0.5 to 6. Along the third direction, the maximum dimension of the battery cell 21 is D, and the L / D ratio ranges from 1 to 30. The battery 10 further comprises a protective plate 321, the protective plate 321 being arranged on the second section 32.The protective plate 321 is arranged along the second direction opposite the second surface 2121 of the battery cell 21, which is provided with electrode connection 214. The electrode connection 214 is located below the battery cell 21, with the protective plate 321 positioned below the electrode connection 214. The distance between the electrode connection 214 and the protective plate 321 is 1.2 mm to 25 mm. The box 30 further comprises several thermally conductive elements 40, the thermally conductive elements 40 being arranged along the first direction and the thermally conductive elements 40 being arranged along the third direction. One thermally conductive element 40 is arranged on each side of the battery assembly 20 along the third direction, and the first surfaces 2111 on both sides along the third direction are each thermally connected to the thermally conductive element 40. A heat exchange medium channel is provided within the thermally conductive element 40. The battery 10 further comprises a current collector 50, the current collector 50 extending along the third direction and being fluidly connected to the thermally conductive element 40.Two current collectors 50 are provided, wherein the two current collectors 50 are arranged together at one end of the electrical device 1 along the direction of movement and at intervals along the second direction. Within the box 30, a support plate 311 is provided, the support plate 311 is arranged on the first section 31, and the battery cell 21 is firmly connected to the support plate 311 via its second surface 2121, which has no electrode connections 214. The second surface 2121, which has no electrode connections 214, is firmly connected to the support plate 311 via the first adhesion layer 61; the thermally conductive element 40 is thermally connected to the first surface 2111 via a second adhesion layer 62, wherein the ratio of the thermal conductivity coefficient of the first adhesion layer 61 to the thermal conductivity coefficient of the second adhesion layer 62 is in the range of 0.1 to 1. Finally, it should be noted that the embodiments mentioned above serve only to illustrate the technical solutions of this application and are not intended to limit them. Although the present application has been described in detail with reference to the embodiments mentioned above, it should be obvious to those skilled in the art that modifications can be made to the technical solutions described in the embodiments mentioned above, or that some or all of the technical features therein can be replaced by equivalent substitute solutions. Such modifications or substitutions do not result in the corresponding technical solutions deviating from the scope of the technical solutions of the embodiments of the present application, and they should all fall within the scope of the claims and the description of the present application.In particular, the various technical features mentioned in the embodiments can be combined in any way, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions that fall within the scope of the claims.

Claims

Battery, characterized in that it comprises a battery assembly (20), wherein the battery assembly (20) comprises at least one battery cell (21), the battery assembly (20) is arranged along a first direction, wherein the first direction is the longitudinal direction of the battery (10) or the direction of movement of an electrical device (1) into which the battery (10) is installed; wherein the battery cell (21) comprises several surfaces, the several surfaces comprising a first surface (2111) with the largest surface area, wherein the several surfaces further comprise two opposing second surfaces (2121), the two second surfaces each being connected to the first surface, wherein the battery cell (21) further comprises a pressure relief mechanism (215), the pressure relief mechanism (215) being arranged on the first surface or one of the second surfaces (2121). Battery according to claim 1, characterized in that the two second surfaces (2121) are arranged opposite each other along a second direction, wherein the second direction intersects the first direction. Battery according to claim 1, characterized in that the two second surfaces (2121) are arranged opposite each other along the first direction. Battery according to claim 1, characterized in that the first surface (2111) intersects a horizontal plane. Battery according to claim 2, characterized in that the second direction intersects the horizontal plane or runs parallel to it. Battery according to one of claims 1 to 5, characterized in that it further comprises a thermally conductive element (40), wherein the thermally conductive element (40) is arranged along the first direction, wherein the battery cell (21) is thermally connected to the thermally conductive element (40) at least via the first surface (2111). Battery according to claim 6, characterized in that it comprises at least two battery assemblies (20), wherein both sides of the heat-conducting element (40) are thermally connected to the two battery assemblies (20) along a third direction, the third direction intersecting both the first direction and the first surface (2111). Battery according to claim 6, characterized in that the longitudinal direction of the battery (10) runs parallel to or intersects the direction of movement of the electrical device (1). Battery according to claim 6, characterized in that a heat exchange medium channel is arranged in the heat-conducting element (40). Battery according to claim 9, characterized in that the battery (10) comprises several heat-conducting elements (40), wherein the several heat-conducting elements (40) are arranged along the third direction, the third direction intersecting both the first direction and the first surface (2111). Battery according to claim 10, characterized in that a heat-conducting element (40) is arranged along the third direction on both sides of the battery assembly (20), wherein the battery assembly (20) is thermally connected to the heat-conducting elements (40) arranged on both sides. Battery according to claim 10, characterized in that the battery cell (21) comprises two opposing first surfaces (2111) along the third direction, each of the two first surfaces (2111) of the battery cell (21) being thermally connected to a heat-conducting element (40). Battery according to claim 6, characterized in that the battery cell (21) comprises an electrode assembly (213), wherein the electrode assembly (213) comprises a main body section (2131) and an electrode tab (2132) projecting from the main body section (2131), wherein the electrode tab (2132) is electrically connected to the electrode terminal (214), wherein along the third direction the projections of the heat-conducting element (40) and the main body section (2131) overlap at least partially to form an overlap region, wherein the third direction intersects both the first direction and the first surface (2111). Battery according to claim 13, characterized in that along the second direction the dimension of the main body section (2131) is L1 and the dimension of the heat-conducting element (40) is L2, wherein 0.5 ≤ L2 / L1 ≤ 1.5, the first direction, the second direction and the third direction intersect in pairs. Battery according to claim 14, characterized in that along the second direction the dimension of the overlap area is L3, wherein 0.5 ≤ L3 / L1 ≤ 1. Battery according to one of claims 6 to 15, characterized in that the battery (10) further comprises a current collector (50), wherein the current collector (50) is connected in fluid connection with a plurality of the heat-conducting elements (40); wherein one end of the heat-conducting element (40) is provided with a current collector (50) in the first direction or the two ends of the heat-conducting element (40) are each provided with the current collector (50) in the first direction. Battery according to claim 16, characterized in that two current collectors (50) are provided, wherein the two current collectors (50) are arranged at one end of the heat-conducting element (40) in the first direction and the two current collectors (50) are arranged along the second direction, wherein the second direction intersects both the first direction and the horizontal plane. Battery according to one of claims 1 to 5, characterized in that the battery cell (21) comprises an electrode connection (214), wherein at least one electrode connection (214) is provided, wherein the pressure relief mechanism (215) and at least one electrode connection (214) are arranged on the same second surface (2121) or the pressure relief mechanism (215) and the electrode connection (214) are each arranged on both second surfaces (2121). Battery according to claim 18, characterized in that the electrode connection (214) comprises two electrode connections (214) with opposite polarity, wherein the two electrode connections (214) are arranged on a second surface (2121) or the two electrode connections (214) are each arranged on both second surfaces (2121). Battery according to one of claims 1 to 5, characterized in that the battery cell (21) comprises an electrode connection (214), wherein the electrode connection (214) is arranged on the first surface (2111). Battery according to claim 20, characterized in that the battery cell (21) comprises a first surface (2111) and a fourth surface which is arranged opposite the first surface, wherein the first surface (2111) and the fourth surface are arranged opposite each other along the third direction, the third direction intersecting both the first direction and the first surface (2111), wherein the edge of the fourth surface is provided with a recess, wherein the first surface (2111) is designed for arranging the electrode connection (214), the electrode connection (214) projects from the first surface (2111) in the third direction and corresponds to the recess. Battery according to one of claims 1 to 5, characterized in that the multiple surfaces further comprise two third surfaces (2112) arranged opposite each other along the first direction, wherein the first direction, the second direction and the third direction intersect in pairs, the electrode connection (214) comprises two electrode connections (214) with opposite polarity, wherein the two electrode connections (214) are arranged on a third surface (2112) or the two electrode connections (214) are each arranged on both third surfaces (2112). Battery according to one of claims 1 to 5, characterized in that the battery cell (21) comprises an electrode assembly (213), wherein the electrode assembly (213) has a wound structure and is flat, the outer surface of the electrode assembly (213) comprises two flat planes, the two flat planes being opposite each other along the third direction; or wherein the electrode assembly (213) may have a laminated structure, wherein a first electrode plate, a separating film and a second electrode plate of the electrode assembly (213) are stacked along the third direction; wherein the third direction intersects both the first direction and the first surface (2111). Battery according to one of claims 1 to 5, characterized in that the battery assembly (20) comprises at least two battery cells (21), wherein the at least two battery cells (21) are arranged along the first direction. Battery according to one of claims 1 to 5, characterized in that along the first direction the maximum dimension of the battery cell (21) is L and along the second direction the maximum dimension of the battery cell (21) is H, wherein the ratio of L / H is in the range of 0.5 to 6, wherein the second direction intersects both the first direction and the horizontal plane. Battery according to claim 25, characterized in that along the third direction the maximum dimension of the battery cell (21) is D, wherein the range is from L / D 1 to 30, wherein the first direction, the second direction and the third direction intersect in pairs. Battery according to claim 18, characterized in that the electrode connection (214) and the pressure relief mechanism (215) are arranged on a second surface (2121), wherein the battery (10) comprises a support plate (311), wherein the battery cell (10) is firmly connected to the support plate (311) via another second surface (2121) which is not provided with an electrode connection (214), wherein the second direction intersects both the first direction and the horizontal plane. Battery according to claim 27, characterized in that the other second surface is firmly connected to the support plate (311) via a first adhesion layer (61), wherein the thermally conductive element (40) is thermally connected to the first surface (2111) via a second adhesion layer (62), the thermal conductivity coefficient of the first adhesion layer (61) being less than or equal to the thermal conductivity coefficient of the second adhesion layer (62). Battery according to claim 28, characterized in that the ratio of the thermal conductivity coefficient of the first adhesion layer (61) to the thermal conductivity coefficient of the second adhesion layer (62) is in the range of 0.1 to 1. Electrical device, characterized in that it comprises a battery (10) according to one of claims 1 to 29, wherein the battery (10) is designed to supply electrical energy for driving the electrical device (1) for movement. Electrical device according to claim 30, characterized in that the first direction designates the direction of movement of the electrical device (1) when the longitudinal direction of the battery (10) deviates from the direction of movement of the electrical device (1).

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