Battery, electrical device, method and device for preparing battery

Abstract

Provided are a battery, an electrical device, and a method and device for preparing the battery. The battery comprises: a battery cell (20); a housing (11), the housing (11) comprising a first cavity (111) and a second cavity (112), the battery cell (20) being accommodated in the first cavity (111); a fixing plate (101), the fixing plate (101) comprising a fixing portion (1011) and an extension portion (1012), the fixing portion (1011) being located in the first cavity (111) and being used to fix the battery cell (20) to the first wall of the first cavity (111), the extension portion (1012) being located in the second cavity (112) and being connected to the second wall (1121) of the second cavity (112), wherein the first wall and the second wall (1121) are different walls. The technical solution of the embodiment of the present application can improve the safety performance of the battery.

Description

Technical Field

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

[0002] With the increasing severity of environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor in its development.

[0003] The structural strength of a battery affects its stability and safety, and thus its safety performance. Improving battery safety performance is a pressing technical issue in battery technology. Summary of the Invention

[0004] The present application provides a battery, an electrical device, and a method and device for preparing a battery, which can improve the structural strength and impact resistance of the battery, thereby improving the safety performance of the battery.

[0005] In a first aspect, a battery is provided, comprising a battery cell, a box body and a fixing plate, wherein the box body comprises a first cavity and a second cavity, the battery cell is accommodated in the first cavity, the fixing plate comprises a fixing portion and an extension portion, the fixing portion is located in the first cavity and is used to fix the battery cell to the first wall of the first cavity, the extension portion is located in the second cavity and is connected to the second wall of the second cavity, wherein the first wall and the second wall are different walls.

[0006] In an embodiment of the present application, the fixing portion of the fixing plate fixes the battery cell to the first wall of the first cavity, and the extension portion of the fixing plate connected to the fixing portion is connected to the second wall of the second cavity. That is to say, the battery cell is not only fixed to the first wall through the fixing portion, but also connected to the second wall through the extension portion connected to the fixing portion. This increases the connection between the battery cell and the box, improves the structural strength and impact resistance of the battery, and thus improves the safety performance of the battery.

[0007] In some embodiments, the battery cell is disposed on a common wall of the first cavity and the second cavity, the common wall is used to separate the first cavity and the second cavity, and the second wall is disposed opposite to the common wall.

[0008] The second wall arranged opposite to the common wall is connected via the extension portion, so that the second wall, the common wall and the extension portion form an I-shaped structure, further enhancing the structural strength and impact resistance of the battery.

[0009] In some embodiments, the second wall is perpendicular to the fixing portion, and a connecting portion is provided at one end of the extending portion close to the second wall. The connecting portion extends in a direction parallel to the second wall and is fixedly connected to the second wall.

[0010] The connecting portion extends parallel to the second wall and is fixedly connected to the second wall, which increases the contact area between the two and improves the stability of the connection between the two. The connecting portion is connected to the battery cell through the fixing portion, thereby improving the stability of the connection between the battery cell and the box.

[0011] In some embodiments, the extension portion is provided with a buffer structure for absorbing the impact force exerted on the second wall.

[0012] By arranging a buffer structure on the extension portion connected to the second wall, the buffer structure is used to absorb the impact force received by the second wall. In this way, the impact force received by the second wall can be reduced. At the same time, the buffer structure absorbs the impact force received by the second wall, thereby reducing the impact force transmitted to the battery cell in the box, thereby further enhancing the impact resistance of the battery.

[0013] In some embodiments, the buffer structure is located near the connection between the extension and the second wall. When the second wall is subjected to an impact force, the impact force can be absorbed by the buffer structure earlier, thereby improving the buffering effect of the buffer structure.

[0014] In some embodiments, the buffer structure includes a concave-convex structure or a bent structure. By configuring the buffer structure to have a certain bending angle, the buffer effect of the buffer structure can be improved.

[0015] In some embodiments, a common wall of the first cavity and the second cavity is provided with an opening, and the extension portion extends into the second cavity through the opening.

[0016] In order to improve the stability of the fixing plate, the fixing portion and the extension portion of the fixing plate are arranged into an integrated structure, the fixing portion is arranged in the first cavity, and the extension portion is arranged in the second cavity, and the first cavity and the second cavity are separated by a common wall, so an opening is provided on the common wall, so that the fixing portion and the extension portion of the fixing plate are respectively located in the first cavity and the second cavity in the case of an integrated structure.

[0017] In some embodiments, the battery includes a battery module, and the battery module includes: N columns of battery cells, wherein each column of the N columns of battery cells includes a plurality of battery cells arranged along a first direction, and the N columns of battery cells are arranged along a second direction, N is an integer greater than 1, and the first direction is perpendicular to the second direction; and N-1 fixing plates, which extend along the first direction and are arranged between two adjacent columns of battery cells, and the fixing portion is fixedly connected to each of the battery cells in the two columns of battery cells; wherein a fixing structure is provided at the end of the fixing portion in the first direction, and the fixing portion is fixed to the first wall through the fixing structure.

[0018] A fixing plate is installed between two adjacent rows of battery cells in the battery module. The fixing portion of the fixing plate is fixedly connected to each battery cell in the two rows. A fixing structure is provided at the end of the fixing portion, and the fixing portion is fixed to the casing via the fixing structure. In this way, each battery cell in the battery is fixed to the casing by the fixing portion and the fixing structure, so that each battery cell can transfer its load to the casing, ensuring the structural strength of the battery.

[0019] In some embodiments, the fixing structure includes an end plate, the end plate being fixedly connected to the end of the fixing portion and the battery cell located at the end of the fixing portion, and the end plate being fixedly connected to the first wall. This can further enhance the fixing effect on the battery cell.

[0020] In a second aspect, an electrical device is provided, comprising the battery according to the first aspect or any possible implementation of the first aspect, wherein the battery is configured to provide electrical energy.

[0021] In a third aspect, a method for preparing a battery is provided, comprising: providing a battery cell, providing a box body, the box body comprising a first cavity and a second cavity, providing a fixing plate, the fixing plate comprising a fixing portion and an extension portion, accommodating the battery cell in the first cavity, fixing the battery cell to the first wall of the first cavity by the fixing portion in the first cavity, the extension portion extending into the second cavity and connected to the second wall of the second cavity, wherein the first wall and the second wall are different walls.

[0022] In a fourth aspect, a device for preparing a battery is provided, including a providing module for providing a battery cell, a box body and a fixing plate, the box body including a first cavity and a second cavity, the fixing plate including a fixing portion and an extension portion, an installation module for accommodating the battery cell in the first cavity, fixing the battery cell to the first wall of the first cavity by the fixing portion in the first cavity, the extension portion extending into the second cavity and connected to the second wall of the second cavity, wherein the first wall and the second wall are different walls.

[0023] According to the technical solution of the embodiment of the present application, the fixing portion of the fixing plate fixes the battery cell to the first wall of the first cavity, and the extension portion of the fixing plate connected to the fixing portion is connected to the second wall of the second cavity. That is to say, the battery cell is not only fixed to the first wall through the fixing portion, but also connected to the second wall through the extension portion connected to the fixing portion. This increases the connection between the battery cell and the box, improves the structural strength and impact resistance of the battery, and thus improves the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0025] Figure 1 is a structural schematic diagram of a vehicle according to an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of a battery according to an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of a battery cell according to an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of a battery according to an embodiment of the present application;

[0029] Figure 5 is a schematic diagram of a buffer structure of a fixed plate according to an embodiment of the present application;

[0030] Figure 6 is a schematic diagram of a battery according to an embodiment of the present application;

[0031] Figure 7 is a schematic diagram of a battery module according to an embodiment of the present application;

[0032] Figure 8 is a schematic flow chart of a method for preparing a battery according to an embodiment of the present application;

[0033] Figure 9 It is a schematic block diagram of an apparatus for preparing a battery according to an embodiment of the present application.

[0034] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0035] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0036] Throughout the description of this application, it should be noted that, unless otherwise specified, all technical and scientific terms used have the same meanings as commonly understood by one skilled in the art to which this application belongs. The terms used are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including," "having," and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions. "Multiple" means more than two. Terms such as "upper," "lower," "left," "right," "inner," and "outer" to indicate positions or relationships are intended solely for the purpose of describing this application and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but rather refers to positions within an acceptable range of error. "Parallel" does not mean parallel in the strict sense, but rather refers to positions within an acceptable range of error.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0040] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0041] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0042] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The current collector uncoated with the positive active material layer protrudes from the current collector coated with the positive active material layer, and the current collector uncoated with the positive active material layer serves as the positive electrode tab. For lithium-ion batteries, for example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The current collector uncoated with the negative active material layer protrudes from the current collector coated with the negative active material layer, and the current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, among others. To ensure that high currents can pass without fusing, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of polypropylene (PP) or polyethylene (PE). Furthermore, the electrode assembly can be a wound or laminated structure, but the embodiments of the present application are not limited thereto.

[0043] To meet different power requirements, a battery can include multiple battery cells, where the multiple battery cells can be connected in series, parallel, or in a hybrid connection. Hybrid connection refers to a mixture of series and parallel connections. Optionally, multiple battery cells can first be connected in series, parallel, or in a hybrid connection to form a battery module, and multiple battery modules can then be connected in series, parallel, or in a hybrid connection to form a battery. In other words, multiple battery cells can be directly combined into a battery, or they can first be combined into battery modules, and then the battery modules can be combined into a battery. The battery is further installed in an electrical device to provide power to the device.

[0044] The development of battery technology requires simultaneous consideration of multiple design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and safety. Among these, insufficient structural strength of the battery will affect its safety performance.

[0045] In view of this, the embodiments of the present application provide a technical solution in which a fixing plate is disposed within the housing. The fixing portion of the fixing plate is located within the first cavity of the housing. The battery cells are fixed to the first wall of the first cavity via the fixing portion. The fixing portion of the fixing plate extends into the second cavity of the housing to form an extension portion, which is then connected to the second wall of the second cavity. In this way, the battery cells are not only fixed to the first wall via the fixing portion, but are also connected to the second wall via the extension portion connected to the fixing portion. This strengthens the connection between the battery cells and the housing, improves the structural strength and impact resistance of the battery, and thus enhances the safety performance of the battery.

[0046] The technical solutions described in the embodiments of the present application are applicable to various battery-using devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0047] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0048] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 can be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 40. For example, a battery 10 can be provided at the bottom, front or rear of the vehicle 1. The battery 10 can be used to power the vehicle 1. For example, the battery 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery 10 can not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0049] In order to meet different power requirements, the battery 10 may include a plurality of battery cells. Figure 2 FIG2 is a schematic diagram of the structure of a battery 10 according to an embodiment of the present application. The battery 10 may include a plurality of battery cells 20. The battery 10 may also include a housing 11. The housing 11 has a hollow interior and accommodates the plurality of battery cells 20. For example, the plurality of battery cells 20 may be connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0050] The number of battery cells 20 can be set to any value based on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or in a hybrid manner to achieve higher capacity or power. Since each battery 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements. A battery can include multiple battery modules, which can be connected in series, parallel, or in a hybrid manner.

[0051] like Figure 3, is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application, wherein the battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell or battery box 21. The walls of the shell 211 and the cover plate 212 are both referred to as walls of the battery cell 20, wherein for a rectangular battery cell 20, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the one or more electrode assemblies 22 after being combined. For example, the shell 211 may be a hollow cuboid, a cube or a cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or a cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall, so that the inside and outside of the shell 211 are connected. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for accommodating the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0052] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member 23, also known as a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and electrically connects the electrode assembly 22 to the electrode terminals 214.

[0053] like Figure 3 As shown, each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarity of the first electrode tab 221a and the second electrode tab 222a are opposite. For example, when the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab. The first electrode tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via a connecting member 23, and the second electrode tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one connecting member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via another connecting member 23.

[0054] In the battery cell 20, the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. Figure 3 As shown, four independent electrode assemblies 22 are provided in the battery cell 20 .

[0055] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0056] The pressure relief mechanism 213 may be of various possible pressure relief structures, which are not limited in the present embodiment. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0057] Figure 4 FIG. 1 shows a schematic diagram of a battery 10 according to an embodiment of the present application. Figure 4 As shown, the battery 10 includes a battery cell 20, a housing 11, and a fixing plate 101. The housing 11 includes a first cavity 111 and a second cavity 112, with the battery cell 20 accommodated in the first cavity 111. The fixing plate 101 includes a fixing portion 1011 and an extension portion 1012. The fixing portion 1011 is located in the first cavity 111 and is used to fix the battery cell 20 to the first wall of the first cavity 111. The extension portion 1012 is located in the second cavity 112 and is connected to the second wall 1121 of the second cavity 112. The first wall and the second wall 1121 are different walls.

[0058] The box body 11 is divided into two cavities, a first cavity 111 and a second cavity 112. The battery cell 20 is located in the first cavity 111. The first wall of the first cavity 111 is fixed to the battery cell 20 by the fixing portion 1011 of the fixing plate 101. The first wall can be the side wall of the first cavity or the bottom wall of the first cavity. The extension portion 1012 of the fixing plate 101 is formed by the fixing portion 1011 extending into the second cavity 112. For example, the fixing portion 1011 and the extension portion 1012 of the fixing plate 101 can be an integrally formed structure, and this integrally formed structure can be obtained by a variety of processing techniques, such as machining, mold processing, etc. The fixing plate 101 can be a metal plate, for example, a steel plate or an aluminum plate, or a plastic plate. The material of the fixing plate 101 can also be a composite material, for example, other materials are coated on the surface of the metal plate, and this embodiment of the present application is not limited to this.

[0059] The fixing portion 1011 of the fixing plate 101 fixes the battery cell 20 to the first wall of the first cavity 111, and the extension portion 1012 of the fixing plate 101 connected to the fixing portion 1011 is connected to the second wall 1121 of the second cavity 112. That is, the battery cell 20 is not only fixed to the first wall through the fixing portion 1011, but also connected to the second wall 1121 through the extension portion 1012 connected to the fixing portion 1011. This increases the connection between the battery cell 20 and the box body 11, improves the stability of the battery cell 20 in the box body 11, and thus improves the safety performance of the battery 10.

[0060] In one implementation, Figure 4 As shown, the battery cell 20 is disposed on a common wall 1131 of the first cavity 111 and the second cavity 112 . The common wall 1131 is used to separate the first cavity 111 and the second cavity 112 . The second wall 1121 is disposed opposite to the common wall 1131 .

[0061] The common wall 1131 is arranged opposite to the second wall 1121. Figure 4 As shown, the common wall 1131 is the bottom wall of the first cavity 111. As described above, the first wall of the first cavity 111 can be a side wall or a bottom wall of the first cavity 111. When the first wall of the first cavity 111 is the bottom wall, the common wall 1131 and the first wall are the same wall.

[0062] The second wall 1121 opposite to the common wall 1131 is connected via the extension portion 1012 , so that the second wall 1121 , the common wall 1131 and the extension portion 1012 form an I-shaped structure, further enhancing the structural strength and impact resistance of the battery.

[0063] In one implementation, Figure 4 As shown, the second wall 1121 is perpendicular to the fixing portion 1011 , and a connecting portion 1013 is provided at one end of the extending portion 1012 close to the second wall 1121 . The connecting portion 1013 extends in a direction parallel to the second wall 1121 and is fixedly connected to the second wall 1121 .

[0064] The connection portion 1013 may be fixed to the second wall 1121 by means of resistance welding, resistance riveting, self-piercing rivet (SPR), locking bolts, clamping, or bonding, etc., which is not limited in the embodiment of the present application.

[0065] The connecting portion 1013 extends parallel to the second wall 1121 and is fixedly connected to the second wall 1121. The entire connecting portion 1013 can contact the second wall 1121, increasing the contact area between the two, thereby enhancing the stability of the connection between the connecting portion 1013 and the second wall 1121. The connecting portion 1013 is connected to the battery cell 20 through the fixing portion 1011, thereby improving the stability of the battery cell 20 in the box.

[0066] In one implementation, the extension 1012 is provided with a buffer structure 1014 for absorbing the impact force exerted on the second wall 1121. This can reduce the impact force exerted on the second wall 1121. Simultaneously, the buffer structure 1014 absorbs the impact force exerted on the second wall 1121, thereby reducing the impact force transmitted to the battery cells 20 in the housing 11, further enhancing the battery's impact resistance.

[0067] In one implementation, the buffer structure 1014 is located near the connection between the extension portion 1012 and the second wall 1121. The buffer structure 1014 is disposed near the second wall 1121. When the second wall 1121 is subjected to an impact force, the impact force can be absorbed earlier by the buffer structure 1014, thereby improving the buffering effect of the buffer structure 1014.

[0068] In one implementation, the buffer structure 1014 may include: Figure 5 The concave-convex structure shown in (a) or Figure 5 The bending structure shown in (b).

[0069] It should be understood that the concave-convex structure or the bent structure are two structures that are better at providing a buffering effect for the buffer structure 1014. Any other structure that can provide a buffering effect can also be used, and the embodiments of the present application are not limited to this. In addition, the buffer structure 1014 of the extension portion 1012 can be provided with one or more, and the embodiments of the present application are not limited to this.

[0070] By configuring the buffer structure 1014 to have a certain bending angle, the buffer effect of the buffer structure 1014 can be improved.

[0071] In one implementation, Figure 4As shown, a common wall 1131 of the first cavity 111 and the second cavity 112 is provided with an opening 1130, and the extension portion 1012 extends into the second cavity 112 through the opening 1130. In order to improve the stability of the fixing plate 101, the fixing portion 1011 and the extension portion 1012 of the fixing plate 101 are configured as an integrated structure, with the fixing portion 1011 disposed in the first cavity 111 and the extension portion 1012 disposed in the second cavity 112. The first cavity 111 and the second cavity 112 are separated by the common wall 1131, and therefore the opening 1130 is provided on the common wall 1131, so that the fixing portion 1011 and the extension portion 1012 of the fixing plate 101 are respectively located in the first cavity 111 and the second cavity 112 in the case of the integrated structure.

[0072] In one implementation, the battery 10 includes a battery module 100. Figure 6 As shown, the battery module 100 includes N columns of battery cells 20 and N-1 fixing plates 101. N is an integer greater than 1. In the drawings of this application, N is 2, indicating that the battery module 100 includes two columns of battery cells 20 and one fixing plate 101. However, this embodiment of the application is not limited to this. For example, the battery module 100 may also include more columns of battery cells 20.

[0073] Each column of battery cells 20 in the N columns of battery cells 20 includes a plurality of battery cells 20 along a first direction, for example, Figure 6 The battery cells 20 are arranged in the x direction. The N columns of battery cells 20 are arranged along the second direction, for example, Figure 6 In the y direction, the first direction is perpendicular to the second direction. That is, the first direction is the direction in which the battery cells 20 in each column of battery cells 20 are arranged, and the second direction is the direction in which the battery cells 20 in N columns are arranged.

[0074] The fixing plate 101 extends along the first direction and is disposed between two adjacent columns of battery cells 20. The fixing portion 1011 of the fixing plate 101 is fixedly connected to each battery cell 20 in the two columns of battery cells 20. Figure 6 As shown, two adjacent rows of battery cells 20 can be fixed on both sides of the fixing portion 1011, that is, each battery cell 20 in two adjacent rows of battery cells 20 can be fixedly connected by one fixing plate 101. Figure 6 As shown in FIG, the fixing plate 101 is vertically arranged, that is, the fixing plate 101 is perpendicular to the second direction and is arranged between two columns of battery cells 20.

[0075] In the embodiment of the present application, the battery module 100 includes N columns of battery cells 20 and N-1 fixing plates 101, with the N-1 fixing plates 101 being disposed between the N columns of battery cells 20. That is, the fixing plates 101 are disposed inside the battery module 100, and no fixing plates 101 are disposed outside the battery module 100. For example, one fixing plate 101 is disposed between two columns of battery cells 20, two fixing plates 101 are disposed between three columns of battery cells 20, and so on. This arrangement allows for the use of fewer fixing plates 101, allowing each battery cell 20 in the battery module 100 to be fixedly connected by a fixing plate 101.

[0076] In one implementation, Figure 7 As shown, the fixing portion 1011 is provided with a fixing structure 102 at its end in the first direction, and the fixing portion 1011 is fixed to the housing 11 via the fixing structure 102. The fixing structure 102 is provided at both ends of the fixing portion 1011 in the x-direction. The fixing portion 1011 is fixed to the housing 11 via the fixing structure 102, thereby securing the battery module 100 to the housing 11. As described above, each battery cell 20 in the battery module 100 is fixedly connected by the fixing portion 1011 of the fixing plate 101, and each battery cell 20 is then fixedly connected to the housing 11 via the fixing structure 102.

[0077] The fixing portion 1011 of the fixing plate 101 extends into the second cavity 112 to form an extension portion 1012 that is connected to the second wall 1121 of the case 11. The battery cell 20 is indirectly fixed to the case 11 via the extension portion 1012. That is, the battery cell 20 is connected to different walls of the case 11 via the fixing portion 1011 and the extension portion 1012 of the fixing plate 101, respectively, thereby improving the stability of the battery cell 20 fixed to the case 11.

[0078] In the embodiment of the present application, a fixing plate 101 is disposed between two adjacent columns of battery cells 20 in the battery module 100. A fixing portion 1011 of the fixing plate 101 is fixedly connected to each battery cell 20 in the two columns of battery cells 20. A fixing structure 102 is disposed at the end of the fixing portion 1011 of the fixing plate 101, and the fixing portion 1011 is fixed to the housing 11 via the fixing structure 102. In this way, each battery cell 20 in the battery 10 is fixed to the housing 11 by the fixing portion 1011 and the fixing structure 102. Thus, each battery cell 20 can transfer its load to the housing 11, thereby ensuring the structural strength of the battery 10 and improving the safety performance of the battery 10.

[0079] The fixing portion 1011 of the fixing plate 101 can be fixedly connected to each battery cell 20 in two adjacent columns of battery cells 20 by bonding. For example, in one embodiment of the present application, the fixing portion 1011 and each battery cell 20 in two adjacent columns of battery cells 20 can be bonded by structural adhesive, but this embodiment of the present application is not limited to this.

[0080] Adjacent battery cells 20 in each column of N battery cells 20 may also be bonded, for example, by structural adhesive, but this is not a limitation in the present embodiment. By fixing adjacent battery cells 20 in each column of battery cells 20, the fixation effect of the battery cells 20 can be further enhanced.

[0081] In one implementation, the battery 10 may include multiple battery modules 100, which are arranged along the second direction, with gaps between adjacent battery modules 100. That is, the multiple battery modules 100 are arranged along the y-direction, and there is no fixing plate 101 between adjacent battery modules 100, with a certain gap. In other words, within a battery module 100, a fixing plate 101 is provided between two columns of battery cells 20, but no fixing plate 101 is provided between adjacent battery modules 100. In this way, on the one hand, the number of fixing plates 101 inside the battery 10 can be reduced as much as possible, and on the other hand, a certain gap can be formed between adjacent battery modules 100 to provide expansion space for the battery cells 20.

[0082] In one implementation, the battery module 100 includes two columns of battery cells 20, i.e., N is 2. Accordingly, a fixing plate 101 is provided between the two columns of battery cells 20. As described above, no fixing plate 101 is provided between adjacent battery modules 100. Thus, this embodiment allows for fewer fixing plates 101 to be provided within the battery 10, while at the same time ensuring that each battery cell 20 can be fixed to the fixing portion 1011 of the fixing plate 101 and connected to the housing 11 via the fixing portion 1011 and the fixing structure 102. Simultaneously, the battery cells 20 are indirectly fixed to the housing 11 via the extension portion 1012 of the fixing plate 101, i.e., the battery cells 20 are connected to different walls of the housing 11 via the fixing portion 1011 and the extension portion 1012 of the fixing plate 101, respectively.

[0083] In one implementation, for a battery module 100 including N columns of battery cells 20, N / 2 fixing plates 101 may be provided, wherein each fixing plate 101 is provided between two adjacent columns of battery cells 20, and each column of battery cells 20 is fixedly connected to the fixing portion 1011 of one fixing plate 101. For example, for a battery module 100 including four columns of battery cells 20, two fixing plates 101 may be provided, wherein one fixing plate 101 is provided between the first and second columns of battery cells 20, and the other fixing plate 101 is provided between the third and fourth columns of battery cells 20. For a battery module 100 including six columns of battery cells 20, three fixing plates 101 may be provided, wherein the first fixing plate 101 is provided between the first and second columns of battery cells 20, the second fixing plate 101 is provided between the third and fourth columns of battery cells 20, and the third fixing plate 101 is provided between the fifth and sixth columns of battery cells 20, and so on. Such an arrangement can ensure that each battery cell 20 can be fixed to the fixing portion 1011 of the fixing plate 101 and connected to the box body 11 through the fixing portion 1011 and the fixing structure 102 .

[0084] In one implementation, Figure 7 As shown, the fixing structure 102 includes an end plate 103, which is fixedly connected to the end of the fixing portion 1011 and is fixedly connected to the battery cell 20 located at the end of the fixing portion 1011. The end plate 103 is fixedly connected to the first wall. For example, when the first wall is the bottom wall of the first cavity, the end plate 103 can be directly connected to the bottom wall, or a boss can be provided on the bottom wall, and the end plate 103 is fixed to the bottom wall by connecting with the boss. The end plate 103 can be connected to the end of the fixing portion 1011. For example, for a rectangular battery cell 20, the end plate 103 can be vertically connected to the fixing portion 1011 and connected to the fixing portion 1011 respectively to two adjacent side walls of the rectangular battery cell 20, thereby further strengthening the fixing effect of the battery cell 20.

[0085] The end plate 103 can be made of the same material as the fixing plate 101, such as metal, plastic, or composite material. Alternatively, the end plate 103 can be made of a different material from the fixing plate 101, which is not limited in the present embodiment.

[0086] The connection method between the fixed plate 101 and the end plate 103 can be resistance welding, resistance riveting, SPR, locking bolts or clamping; the end plate 103 can also be fixed to the first wall by resistance welding, resistance riveting, SPR, locking bolts or clamping, but the embodiment of the present application is not limited to this.

[0087] In another embodiment, the battery includes a battery module 100, which includes a plurality of battery cells 20 and side plates and / or end plates. The side plates and / or end plates are used to surround the plurality of battery cells 20 to fix the plurality of battery cells 20. The battery module 100 is fixed to the first wall through the side plates and / or end plates, which are the above-mentioned fixing plates 101.

[0088] The plurality of battery cells 20 are arranged along a first direction and / or along a second direction, and the first direction is perpendicular to the second direction.

[0089] The battery cells 20 may be surrounded by both end plates and side plates, or may be provided with only side plates or only end plates. For example, the battery cells 20 may be surrounded by both end plates and side plates, and the side plates and end plates may be vertically provided on the exterior of the battery cells 20.

[0090] In one implementation, the battery module 100 includes a plurality of battery cells 20 , two side plates, and two end plates, which surround the plurality of battery cells 20 .

[0091] The fixed portions 1011 of the side and end plates extend into the second cavity 112 to form an extension 1012 connected to the second wall 1121 of the box body 11. The battery cells 20 are indirectly fixed to the box body 11 via the extension 1012. That is, the battery cells 20 are connected to different walls of the box body 11 via the fixed portions 1011 and the extension 1012 of the side and end plates, respectively, thereby improving the stability of the battery cells 20 fixed to the box body 11.

[0092] The fixing portions 1011 of the side panels and end panels can be fixedly connected to the battery cells 20 located on the periphery of the battery module 100 by bonding. For example, the fixing portions 1011 and the battery cells 20 located on the periphery of the battery module 100 can be bonded by structural adhesive, but this embodiment of the application is not limited to this.

[0093] Each battery cell 20 in the plurality of battery cells 20 may also be bonded together, for example, by means of structural adhesive, but this is not limited in the present embodiment. The fixing of each battery cell 20 in the plurality of battery cells 20 can further enhance the fixing effect of the battery cells 20 .

[0094] An embodiment of the present application further provides an electrical device, including the battery 10 in the above embodiment. Optionally, the electrical device may be a vehicle 1, a ship, or a spacecraft, etc., but the embodiment of the present application is not limited to this.

[0095] The battery 10 and the electrical device according to the embodiment of the present application are described above. The method and device for preparing the battery according to the embodiment of the present application will be described below. For the parts not described in detail, please refer to the aforementioned embodiments.

[0096] Figure 8 A schematic flow chart of a method 300 for preparing a battery according to an embodiment of the present application is shown.

[0097] like Figure 8 As shown, the method 300 may include:

[0098] 310, providing a battery cell 20;

[0099] 320, providing a box body 11, the box body 11 including a first cavity 111 and a second cavity 112;

[0100] 330 , providing a fixing plate 101 , the fixing plate 101 including a fixing portion 1011 and an extending portion 1012 ;

[0101] 340, the battery cell 20 is accommodated in the first cavity 111, and the battery cell 20 is fixed to the first wall of the first cavity 111 by the fixing portion 1011 in the first cavity 111, and the extension portion 1012 extends into the second cavity 112 and is connected to the second wall 1121 of the second cavity 112, wherein the first wall and the second wall 1121 are different walls.

[0102] Figure 9 FIG. 4 is a schematic block diagram of a device 400 for preparing a battery according to an embodiment of the present application. Figure 9 As shown, the battery preparation device 400 may include: a providing module 410 and a mounting module 420 .

[0103] Provide a module 410 for providing a battery cell 20, a box 11 and a fixing plate 101, wherein the box 11 includes a first cavity 111 and a second cavity 112, and the fixing plate 101 includes a fixing portion 1011 and an extending portion 1012;

[0104] The mounting module 420 is used to accommodate the battery cell 20 in the first cavity 111, and fix the battery cell 20 to the first wall of the first cavity 111 through the fixing portion 1011 in the first cavity 111, and the extension portion 1012 extends into the second cavity 112 and is connected to the second wall 1121 of the second cavity 112, wherein the first wall and the second wall 1121 are different walls.

[0105] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery, characterized in that: include: A battery cell (20), the battery cell (20) comprising an electrode assembly (22) and an electrode terminal (214), the electrode terminal (214) being electrically connected to the electrode assembly (22); A box (11), the box (11) comprising a first cavity (111) and a second cavity (112), the battery cell (20) being accommodated in the first cavity (111); and A fixing plate (101), the fixing plate (101) comprising a fixing portion (1011) and an extending portion (1012), the fixing portion (1011) and the extending portion (1012) being an integrally formed structure, the fixing portion (1011) being located in the first cavity (111) and being fixedly connected to the battery cell (20) for fixing the battery cell (20) to a first wall of the first cavity (111), the extending portion (1012) being located in the second cavity (112) and being connected to a second wall (1121) of the second cavity (112), wherein the first wall and the second wall (1121) are different walls; The second wall (1121) is perpendicular to the fixing portion (1011); a connecting portion (1013) is provided at one end of the extending portion (1012) close to the second wall (1121); the connecting portion (1013) extends in a direction parallel to the second wall (1121); and the connecting portion (1013) is fixedly connected to the second wall (1121); The common wall (1131) of the first cavity (111) and the second cavity (112) is provided with an opening (1130), and the extension portion (1012) extends into the second cavity (112) through the opening (1130).

2. The battery according to claim 1, characterized in that The battery cell (20) is arranged on a common wall (1131) of the first cavity (111) and the second cavity (112); the common wall (1131) is used to separate the first cavity (111) and the second cavity (112); and the second wall (1121) is arranged opposite to the common wall (1131).

3. The battery according to claim 1, characterized in that The extension portion (1012) is provided with a buffer structure (1014) for absorbing the impact force exerted on the second wall (1121).

4. The battery according to claim 3, characterized in that The buffer structure (1014) is close to the connection between the extension portion (1012) and the second wall (1121).

5. The battery according to claim 3, characterized in that The buffer structure (1014) includes a concave-convex structure or a bent structure.

6. The battery according to any one of claims 1 to 5, characterized in that The battery comprises a battery module (100), wherein the battery module (100) comprises: N columns of battery cells (20), wherein each column of the N columns of battery cells (20) includes a plurality of battery cells (20) arranged along a first direction, the N columns of battery cells (20) are arranged along a second direction, N is an integer greater than 1, and the first direction is perpendicular to the second direction; and N-1 fixing plates (101), the fixing plates (101) extending along the first direction and arranged between two adjacent rows of battery cells (20), the fixing portion (1011) being fixedly connected to each of the battery cells (20) in the two rows; Wherein, a fixing structure (102) is provided at the end of the fixing portion (1011) in the first direction, and the fixing portion (1011) is fixed to the first wall via the fixing structure (102).

7. The battery according to claim 6, characterized in that The fixing structure (102) includes an end plate (103), the end plate (103) being fixedly connected to the end of the fixing portion (1011) and fixedly connected to the battery cell (20) located at the end of the fixing portion (1011), and the end plate being fixedly connected to the first wall.

8. An electrical device, characterized in that: include: The battery according to any one of claims 1 to 7, wherein the battery is used to provide electrical energy.

9. A method for preparing a battery, characterized in that: include: Providing a battery cell (20); Providing a box body (11), wherein the box body (11) includes a first cavity (111) and a second cavity (112); and A fixing plate (101) is provided, wherein the fixing plate (101) comprises a fixing portion (1011) and an extending portion (1012), wherein the fixing portion (1011) and the extending portion (1012) are an integrally formed structure; The battery cell (20) is accommodated in the first cavity (111), the battery cell (20) is fixedly connected to the fixing portion (1011) in the first cavity (111), and the battery cell (20) is fixed to the first wall of the first cavity (111) through the fixing portion (1011), the extension portion (1012) extends into the second cavity (112) and is connected to the second wall (1121) of the second cavity (112), wherein the first wall and the second wall (1121) are different walls, and the second wall (1121) is perpendicular to the fixing portion (1011); A connecting portion (1013) is provided at one end of the extending portion (1012) close to the second wall (1121), and the connecting portion (1013) is extended in a direction parallel to the second wall (1121) and fixedly connected to the second wall (1121); An opening (1130) is provided on a common wall (1131) of the first cavity (111) and the second cavity (112), and the extension portion (1012) is extended into the second cavity (112) through the opening (1130).

10. A device for preparing a battery, characterized in that: include: A module (410) is provided for providing a battery cell (20), a box (11) and a fixing plate (101), wherein the box (11) includes a first cavity (111) and a second cavity (112), and the fixing plate (101) includes a fixing portion (1011), an extending portion (1012) and a connecting portion (1013), wherein the fixing portion (1011) and the extending portion (1012) are an integrally formed structure; and The mounting module (420) is used to accommodate the battery cell (20) in the first cavity (111), to fix the battery cell (20) to the fixing portion (1011) in the first cavity (111), and to fix the battery cell (20) to the first wall of the first cavity (111) through the fixing portion (1011), and the extending portion (1012) extends into the second cavity (112) and is connected to the second wall (1121) of the second cavity (112), wherein the first wall and the second wall (1121) are different walls. The second wall (1121) is perpendicular to the fixing portion (1011), the connecting portion (1013) is provided at one end of the extension portion (1012) close to the second wall (1121), the connecting portion (1013) extends in a direction parallel to the second wall (1121) and is fixedly connected to the second wall (1121), the common wall (1131) of the first cavity (111) and the second cavity (112) is provided with an opening (1130), and the extension portion (1012) extends into the second cavity (112) through the opening (1130).

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