Battery and related electrical device, preparation method and preparation device

Abstract

A battery comprises: a battery cell matrix comprising a plurality of battery cells arranged in M ​​rows and N columns, each battery cell comprising a housing, an end cap, and two electrode terminals, the electrode terminals being disposed on the two end caps of the battery cells along the column direction, with adjacent battery cells connected in the column direction via opposing electrode terminals, wherein M and N are integers, and M ≥ 2 and N ≥ 2; and at least one reinforcing plate extending along the row direction and secured to the housings of the battery cells in the N columns; the at least one reinforcing plate having a smaller dimension along the column direction than the battery cell in the column direction and secured to the housings of two adjacent rows of battery cells within the M rows. This battery can extend its service life and enhance its safety.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery and related electrical devices, preparation methods and preparation devices. Background Art

[0002] Batteries are widely used in electronic devices, electric vehicles, electric toys, and electric equipment, including mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and electric tools. With the continuous development of battery technology, higher performance requirements are being placed on batteries, and it is hoped that batteries can simultaneously consider multiple design factors.

[0003] In the development of battery technology, in addition to improving battery performance, lifespan and safety are also important issues that cannot be ignored. If a battery's lifespan does not meet expectations, maintenance and operating costs will be high. If battery safety cannot be guaranteed, the battery will be unusable. Therefore, extending battery life and enhancing battery safety are urgent technical challenges in battery technology. Summary of the Invention

[0004] The present application proposes a battery and related electrical devices, preparation methods and devices to extend the service life of the battery and enhance the safety of the battery.

[0005] According to a first aspect of the present application, a battery is provided, comprising: a battery cell matrix and at least one reinforcing plate. The battery cell matrix comprises a plurality of battery cells arranged in M ​​rows and N columns, each battery cell comprising a housing, an end cap, and two electrode terminals, wherein the electrode terminals are respectively provided on two end caps of the battery cells along the column direction, and in the column direction, two adjacent battery cells are connected by opposing electrode terminals, wherein M and N are integers, and M ≥ 2, N ≥ 2. At least one reinforcing plate extends in the row direction and is fixed to the housings of the battery cells in the N columns; and the dimension of the at least one reinforcing plate in the column direction is smaller than the dimension of the battery in the column direction, and is fixed to the housings of the battery cells in two adjacent rows in the M rows.

[0006] In this embodiment, the reinforcing plate securely connects and limits the housings of two adjacent, opposing battery cells. When the battery is in use and environmental vibrations are transmitted to the battery, the reinforcing plate effectively reduces relative movement between the housings of the adjacent battery cells in all directions, thereby effectively increasing the strength of the fixed connection between the battery cells, thereby effectively improving the stability of the battery connection and extending the battery's service life. Furthermore, the area outside the electrical connection between the two adjacent battery cells, covered by the reinforcing plate, prevents foreign matter from entering the electrical connection area, protecting the battery's electrical connection from short circuits or open circuits caused by foreign matter, and enhancing battery safety.

[0007] In some embodiments, the battery includes a plurality of reinforcing plates, and the plurality of reinforcing plates are spaced apart along a column direction.

[0008] In this embodiment, multiple reinforcing plates are provided to securely connect the housings of all adjacent, opposing battery cells, but rather than simply securing them with a single plate, minimizing the plate area while maintaining sufficient strength. This effectively improves the connection strength at each joint after securement, reduces the overall battery volume, and increases the battery's energy density.

[0009] In some embodiments, in the direction of the column, after two adjacent battery cells are placed opposite each other through the electrode terminals, an electrical connection area is formed between the opposite end covers, and each reinforcement plate is respectively configured to cover the electrical connection area between the battery cells in two adjacent rows in the M rows, wherein, along the direction of the column, the electrical connection area has a first width, the reinforcement plate has a second width, and the second width is greater than the first width in the range of 20mm-100mm.

[0010] In this embodiment, the reinforcing plate need not completely cover the battery cells, but only needs to cover the electrical connection area within a certain size range. In this way, the reinforcing plate not only improves the strength of the fixed connection between adjacent opposing battery cells, but also saves material and reduces the manufacturing cost of the reinforcing plate.

[0011] In some embodiments, the battery further includes a limiting component, which is disposed on the side of the reinforcing plate in contact with the battery cell, and extends in the row direction, wherein the limiting component is located in the electrical connection area between the battery cells of two adjacent rows in the M rows.

[0012] In this embodiment, the limiting component located within the electrical connection area can effectively fill the recessed area. Thus, when the battery is in use and vibrations generated in the environment are transmitted to the battery, the reinforcing plate, by being fixed to the housings of adjacent opposing battery cells, can effectively reduce misalignment of the adjacent opposing battery cells in the row direction, thereby preventing electrical connection failure. Furthermore, the limiting component can effectively reduce relative movement of the adjacent opposing battery cells in the column direction, thereby further improving the connection and overall strength of the battery. Simultaneously, a portion of the outer surface of adjacent battery cells in the row or column direction is reinforced and fixed by the reinforcing plate, preventing rotation between adjacent battery cells and improving the stability of the battery. Furthermore, the formed limiting component can also be configured as a reinforcing rib of the reinforcing plate, thereby effectively improving the overall structural strength of the reinforcing plate.

[0013] In some embodiments, the limiting component includes two parallel and oppositely arranged vertical walls, the vertical walls are perpendicularly connected to the reinforcing plate, and the vertical walls are parallel to the end cover of the battery cell; wherein a first preset distance is set between the vertical wall and the end cover.

[0014] In this embodiment, the limiting component is parallel to the end covers between adjacent battery cells, which can improve the accuracy of controlling the gap between the vertical wall and the end cover.

[0015] In some embodiments, the limiting component further includes a transverse wall, which is used to connect the two vertical walls; wherein a second preset distance is set between the transverse wall and the electrode terminal of the battery cell.

[0016] In this embodiment, the overall strength of the two vertical walls of the limiting component can be improved by providing a transverse wall to connect the two vertical walls.

[0017] In some embodiments, the first preset distance and the second preset distance have a size range of 1 mm to 3 mm.

[0018] In this embodiment, the gap formed not only facilitates the insertion of the limiting component into the electrical connection area, but also effectively prevents the limiting component from contacting or interfering with the end caps and electrode terminals of the battery cells, thereby affecting the electrical performance of the battery. This preset distance is particularly necessary when the limiting component is made of a conductive material. Furthermore, the relatively small gap can also limit excessive relative movement between the two battery cells.

[0019] In some embodiments, a plurality of accommodating grooves are formed on the reinforcing plate, each accommodating groove extends in the column direction and is continuously arranged in the row direction, and the accommodating grooves are used to install battery cells, wherein the accommodating grooves are configured to adapt to the surface of the battery cells.

[0020] In this embodiment, on the one hand, the formed accommodating groove is adapted to the surface of the battery cell, which can make the reinforcing plate fit better with the surface of the battery cell shell, thereby improving not only the fixing strength in the column direction, but also the connection area between the reinforcing plate and the battery cell shell, and improving the arrangement strength between multiple battery cells in the row direction; on the other hand, the formed accommodating groove can be further constructed as a reinforcing rib of the reinforcing plate to further improve the overall structural strength of the reinforcing plate.

[0021] In some embodiments, a rib structure is further formed in each accommodating groove, and the rib structure extends along the direction of the row.

[0022] In this embodiment, the provision of the rib structure can further improve the matching accuracy with the battery cell surface, thereby improving the limiting accuracy; it can also further improve the inherent strength of the reinforcing plate, thereby improving the overall connection strength of the battery.

[0023] In some embodiments, the battery includes a multi-layer battery cell matrix, an intermediate support plate, and a reinforcing base plate. The layers of battery cell matrices are stacked and arranged in a vertical direction, and the reinforcing plate is arranged on the top surface of the multi-layer battery cell matrix. The intermediate support plate is arranged between adjacent battery cell matrices to support and / or cool the battery cells. The reinforcing base plate is arranged on the bottom surface of the multi-layer battery cell matrix. The reinforcing base plate is constructed as a rectangular plate structure with row and column directions, and is fixed to the housing of the battery cells of the bottom battery cell matrix.

[0024] In this embodiment, the reinforcing base plate has the same effect of improving the strength of the fixed connection as the reinforcing plate. At the same time, since it is arranged at the bottom of the battery and is arranged into a rectangular plate structure with row and column directions, it has a certain supporting effect, thereby making the overall structure of the battery more stable.

[0025] In some embodiments, the intermediate support plate and / or the reinforcing bottom plate are formed with: a limiting component; and / or an accommodating groove; and / or a rib structure.

[0026] In this embodiment, on the one hand, the limiting components, accommodating grooves and rib structures formed on the intermediate support plate and / or the reinforcing bottom plate have the same technical effects as the limiting components, accommodating grooves and rib structures described above. Since their technical effects are the same, they will not be repeated here; on the other hand, the limiting components, accommodating grooves and rib structures formed on the intermediate support plate and / or the reinforcing bottom plate can also limit the relative movement of adjacent battery cells, thereby maintaining the consistency of the connection and arrangement positions of the battery cells in the battery.

[0027] In some embodiments, the thickness of the reinforcing plate and / or the reinforcing base plate is in the range of 0.5 mm to 2 mm.

[0028] In this embodiment, under the premise of meeting the strength requirements, using a thinner reinforcing plate and / or reinforcing bottom plate can reduce the overall volume of the battery, thereby improving the energy density of the battery.

[0029] According to a second aspect of the present application, an electrical device is provided, comprising the battery described in the first aspect above, wherein the battery is configured to provide electrical energy.

[0030] According to a third aspect of the present application, a method for preparing a battery is provided.

[0031] According to a fourth aspect of the present application, a battery preparation device is provided.

[0032] The battery and the related electrical devices, preparation methods and preparation devices provided in the present application can enhance the connection strength between adjacent battery cells in the multiple battery cells forming the battery, and improve the energy density of the battery by considering the minimum volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0034] Figure 1 Schematic diagrams of the structures of some embodiments of the battery of the present application;

[0035] Figure 2 Schematic diagrams of the structures of some embodiments of the battery cells of the present application;

[0036] Figure 3 for Figure 1 An enlarged schematic diagram of the structure at A of the battery shown;

[0037] Figure 4 for Figure 3 A schematic diagram of the front view of the battery at position A shown;

[0038] Figure 5 for Figure 4 A schematic structural diagram of the battery at C shown;

[0039] Figure 6 Schematic diagram of the partial structure of some embodiments of the reinforcement plate of the present application;

[0040] Figure 7 Schematic diagram of the partial structure of some embodiments of the reinforcement plate of the present application;

[0041] Figure 8 Exploded diagrams of the structures of some embodiments of the battery of the present application;

[0042] Figure 9 Schematic diagram of the partial structure of some embodiments of the reinforced bottom plate of the present application;

[0043] Figure 10 Schematic diagram of some embodiments of the method for preparing the battery of the present application;

[0044] Figure 11 Schematic diagram of the process flow of some embodiments of the battery preparation device of the present application. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0047] In the description of the present application, it should be understood that the terms "center", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0051] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] 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.

[0053] 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. In order to ensure that large currents can pass without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the diaphragm can be PP or PE, etc. In addition, the electrode assembly can be a wound structure or a laminated structure, and the embodiments of the present application are not limited to this. The development of battery technology must simultaneously consider multiple design factors, such as performance parameters such as energy density, cycle life, discharge capacity, and charge and discharge rate. In addition, the safety of the battery also needs to be considered.

[0054] 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 module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0055] When multiple battery cells are electrically connected in series and / or in parallel to form a battery, a variety of arrangements can be used to minimize the overall volume and achieve various shapes of usage spaces. When the battery is a medium-to-large battery, including a large number of battery cells as a whole, if the electrical device vibrates or is impacted during use, the battery will vibrate accordingly and may also be subject to the same impact. When these vibrations and / or impacts act on the battery, if the connection strength between the battery cells is insufficient, the relative movement between the battery cells will amplify the amplitude of the vibration and / or transmit a greater energy impact, resulting in failure of the electrical connection between the battery cells, causing battery life problems, and collisions between the battery cells, causing safety problems such as thermal runaway of the battery. Therefore, for medium-to-large batteries with more complex usage environments, how to improve the connection and overall strength of the battery is a major problem facing medium-to-large batteries.

[0056] For battery cells with flat shells (such as rectangular batteries), when arranging multiple battery cells, the flat surfaces can be set relative to each other, and simple heat insulation and insulating pads can be inserted in the middle. Pre-tightening force can be applied during assembly to maintain a stable relative position between the battery cells, which can resist complex vibrations and impacts of various amplitudes.

[0057] For battery cells with non-flat shells (e.g., cylindrical batteries), the shell itself cannot be used to maintain a stable position, requiring additional fixtures to maintain the position of each cell. This is particularly challenging for a layout where the cells are first connected in series or parallel in a first direction, then in parallel or series as a whole in a second direction, and then stacked as a whole in a third direction. Maintaining the electrical connection strength of each cell in the first direction, maintaining the stable relative position of adjacent cells in the second direction, and maintaining gravitational support between the stacked cell layers present significant challenges.

[0058] In view of this, the inventors of this application have proposed a battery, and will explain its design in detail below, which can improve the electrical connection strength of battery cells and the overall strength of the battery. It is understandable that although the battery described in the embodiments of this application is based on the problems of medium and large power batteries, when the same problems exist, the battery described in the embodiments of this application is also applicable to various devices using batteries.

[0059] 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.

[0060] Figure 1 1 shows the structure of the battery 100 provided in this application. Figure 1 As shown, the battery 100 includes: a battery cell matrix 1 and at least one reinforcing plate 2. The battery cell matrix 1 includes a plurality of battery cells 11 arranged in M ​​rows and N columns, Figure 2 As shown, the battery cell 11 includes a housing 111, an end cap 112, and two electrode terminals 113. The electrode terminals 113 are respectively disposed on the two end caps 112 of the battery cell 11 along the column direction L. Figure 1 As shown, the row direction is H and the column direction is L. In the column direction L, two adjacent battery cells 11 are connected via opposing electrode terminals 113. M and N are integers, and M ≥ 2 and N ≥ 2. At least one reinforcing plate 2 extends along the row direction H and is secured to the housings 111 of the battery cells 11 in N columns. Furthermore, the dimension of at least one reinforcing plate 2 along the column direction L is smaller than the dimension of the battery 100 in the column direction L, and is secured to the housings 111 of the battery cells 11 in two adjacent rows within M rows.

[0061] The battery cell matrix 1 mentioned in the embodiments of the present application refers to a plurality of battery cells 11 arranged in an array on the same layer. The array arrangement means that the battery cells 11 are arranged in M ​​rows and N columns, where M and N are integers, and M≥2, N≥2, so that the battery cell matrix 1 has a row direction H and a column direction L. The battery cells 11 in the battery cell matrix 1 are arranged in parallel and side by side along the row direction H, and at least two battery cells 11 are arranged in the column direction L.

[0062] In this application, two adjacent battery cells 11 in the column direction L are connected by having their electrode terminals facing each other. Battery cells 11 in adjacent columns of the battery cell matrix 1 can be connected in series or parallel via a busbar. The opposing connection mentioned in the embodiments of this application means that after the battery cells 11 are arranged in M ​​rows and N columns, adjacent battery cells 11 in the same column are butted end-to-end via their electrode terminals.

[0063] In this application, a battery cell 11 is the smallest power unit that makes up battery 100. Battery 100 may connect a certain number of battery cells 11 in series and / or in parallel based on the power requirements of the electrical device. Battery cells 11 may be cylindrical, rectangular, cubic, or other shapes. However, given the space constraints of the electrical device, a certain number of battery cells 11 must be arranged in a reasonable manner to minimize the volume of battery 100.

[0064] In the present application, the shell 111 of the battery cell 11 has a cavity for accommodating the electrode assembly and other components of the battery cell 11, and the shape can be a cylinder, a cuboid, a cube, a prism, etc. It can be formed by processing a thin plate with a certain strength such as metal or hard plastic. After the electrode assembly is placed in the shell 111, the battery shell 111 is sealed by the end cover 112 to prevent leakage of the electrolyte inside the battery cell 11. In addition, the electrode assembly 11 is electrically connected to an external power source or electrical equipment through the electrode terminal 113 located on the end cover 112 to realize the charging and discharging function of the battery 100. In the present application, two electrode terminals 113 with opposite polarities are respectively located on the end covers at the two ends of the battery cell 11. In the column direction L, adjacent battery cells 11 can be connected in series or in parallel, depending on the power requirements of the battery 100.

[0065] The reinforcing plate 2 mentioned in the embodiment of the present application can be made of materials such as metal or hard plastic, and the material of the reinforcing plate 2 can be aluminum. The reinforcing plate 2 can be made by a stamping process. The reinforcing plate 2 can be fixedly connected to the shell 111 of the battery cell 11 by bonding. To distinguish it from the frame structure of the battery 100, the number of reinforcing plates 2 is at least one, and the size of each reinforcing plate 2 along the direction L of the column is smaller than the size of the battery. The reinforcing plate 2 is a reinforcing component outside the frame of the battery 100, and does not cover the entire surface of the entire column of batteries. It can improve the air permeability and heat dissipation performance of the battery 100 while meeting the strength requirements.

[0066] Specifically, combined Figure 1 and Figure 2 As shown, the battery cells 11 in the battery cell matrix 1 can be arranged in two forms: one is that the direction L of the column is vertical, that is, the adjacent battery cells 11 in the same column are connected oppositely in a "standing" form, and the connection points of the adjacent battery cells 11 are fixedly connected (for example, welded) to form a battery cell column, and then arranged in the transverse direction, so as to construct a battery cell matrix 1 in which all the battery cells 11 are standing; the other is Figure 1 The direction L of the column shown is the transverse direction, that is, adjacent battery cells 11 in the same column are connected opposite to each other in a "lying flat" form, and the connection points of adjacent battery cells 11 are fixedly connected (for example, welded) to form a battery cell column, and then arranged along the transverse direction, thereby constructing a battery cell matrix 1 in which all battery cells 11 are lying flat.

[0067] In the present application, taking a flat-lying battery cell matrix 1 as an example, the battery 100 according to an embodiment of the present application further includes at least one reinforcing plate 2. Taking the minimum unit M=2 and N=2 as an example, when M and N are the minimum unit 2, the battery 100 includes one reinforcing plate 2. When in use, the reinforcing plate 2 extends along the row direction H and is secured to the housings 111 of the battery cells 11 in two columns and two rows. In this way, the reinforcing plate 2 can completely cover the joints where adjacent battery cells 11 are connected via the electrode terminals 113. At the same time, the reinforcing plate 2 forms a fixed connection with the housings 111 of the battery cells 11.

[0068] Through the above-mentioned arrangement, the reinforcing plate 2 that forms a fixed connection can play a role in fixing and limiting the shells 111 of the two adjacent battery cells 11 that form an opposing relationship. When the battery 100 is in use, after the vibration of the environment is transmitted to the battery 100, the reinforcing plate 2 can effectively reduce the relative movement between the shells 111 of the adjacent battery cells 11 along all degrees of freedom, thereby effectively improving the strength of the fixed connection of the battery cells 11, and further effectively improving the stability of the connection of the battery 100, thereby extending the service life of the battery 100. In addition, the reinforcing plate 2 covers the outer area of ​​the electrical connection between the two adjacent battery cells 11, which can also prevent external foreign matter from entering the electrical connection area, protecting the electrical connection of the battery 100 from short circuits or open circuits caused by foreign matter, thereby enhancing the safety of the battery 100.

[0069] In some embodiments, the battery 100 may include a plurality of reinforcing plates 2, and the plurality of reinforcing plates 2 are spaced apart along the column direction L. Figure 1 As shown, when M>2 and N>2, the battery cell matrix 1 includes a plurality of adjacent opposing battery cells 11 arranged in M ​​rows and N columns, thereby forming an electrical connection area formed by the connection of a plurality of adjacent battery cells 11 extending in the row direction H and spaced apart in the column direction. The plurality of reinforcing plates 2 mentioned in the embodiments of the present application refer to a plurality of separate strip-shaped plates that can be used to securely connect the housings 111 of all adjacent opposing battery cells 11. The plurality of reinforcing plates 2 mentioned in the embodiments of the present application are spaced apart in the column direction L, that is, they match the electrical connection area formed by the connection of adjacent battery cells 11.

[0070] Through the above-mentioned arrangement, a plurality of reinforcing plates 2 are provided to meet the requirement of fixing the shells 111 of all adjacent battery cells 11 that are opposite to each other, but it is not a simple fixation of a whole plate. While meeting the strength requirement, the minimum plate area is used, which can effectively improve the connection strength after the fixed connection of each docking point, and reduce the overall volume and weight of the battery 100, thereby improving the energy density of the battery 100.

[0071] In some embodiments, as Figure 3-Figure 4 As shown, in the row direction L, two adjacent battery cells 11 are placed opposite each other through the electrode terminals 113, and an electrical connection area B is formed between the opposite end caps 112 (as shown in FIG. Figure 4 As shown, each reinforcing plate 2 is configured to cover the electrical connection area B between two adjacent rows of battery cells 11 in the M rows. Along the column direction L, the electrical connection area B has a first width W1, and the reinforcing plate 2 has a second width W2. The second width is greater than the first width and ranges from 20 mm to 100 mm.

[0072] The electrode terminals 113 described in the embodiments of the present application have a smaller footprint on the end caps 112 than the end caps themselves, and protrude a certain height away from the interior of the battery cell 11, forming a cylindrical structure protruding from the end caps 112. The electrical connection region B of the present application is the space formed between adjacent end caps 112 in the row direction L, within which the two electrode terminals 13 are electrically connected. The electrical connection can be achieved by direct butt welding, welding via an adapter, direct compression, or compression fit using elastic members.

[0073] The coverage mentioned in the embodiment of the present application means that after the reinforcing plate 2 is fixed to the shells 111 of the battery cells 11 in two adjacent rows in the M rows, the electrical connection area B is located on the side area of ​​the reinforcing plate 2 facing the interior of the battery 100, thereby achieving the reinforcing plate 2 spanning the shells 111 of two adjacent battery cells 11 and being fixedly connected to the shells 111, thereby strengthening and protecting the electrical connection between the battery cells 11.

[0074] Combine Figure 4 As shown, the first width W1 mentioned in the embodiment of the present application refers to the distance between the two end covers 112 between adjacent opposing battery cells 11 along the column direction L. The second width W2 mentioned in the embodiment of the present application refers to the dimension of the reinforcing plate 2 along the column direction L when the reinforcing plate 2 is a rectangular strip plate portion along the row direction H. In this embodiment, the reinforcing plate 2 may not completely cover the battery cell 11, and only needs to cover the electrical connection area B within a certain size range. In this way, the reinforcing plate 2 not only improves the strength of the fixed connection between adjacent opposing battery cells 11, but also saves the material of the reinforcing plate 2 and reduces the manufacturing cost of the reinforcing plate 2; and can increase the air permeability and heat dissipation of the battery 100.

[0075] In some embodiments, as Figure 3-Figure 7 As shown, the battery 100 may further include a limiting component 3, which is arranged on the side of the reinforcing plate 2 that is in contact with the battery cell 11, and the limiting component 3 extends along the row direction H, wherein the limiting component 3 is located in the electrical connection area B between the battery cells 11 of two adjacent rows in the M row.

[0076] The limiting component 3 mentioned in the embodiment of the present application can be obtained by an integral molding process with the reinforcing plate 2, that is, the limiting component 3 can be processed by stamping the reinforcing plate 2 (such as Figure 4 and Figure 5As shown), it can also be a separate component fixedly connected to the reinforcing plate 2. The limiting component 3 can extend continuously along the row direction H to the entire dimension of the reinforcing plate 2 along the row direction H, or it can extend continuously across several battery cells, or it can be formed separately in the electrical connection area B of a single row of battery cells. When, for example, the stamping depth is greater than or equal to the height of the arc of the reinforcing plate 2, a continuous limiting component 3 can be formed as a whole; when the stamping depth is less than the height of the arc of the reinforcing plate 2, spaced limiting components 3 can be formed, for example, as shown in FIG. Figure 6 and Figure 7 shown.

[0077] In this embodiment, the limiting component 3 located within the electrical connection area B effectively fills this recessed area. Thus, when the battery 100 is in use and vibrations generated in the environment are transmitted to the battery 100, the reinforcing plate 2, by securing it to the housings 111 of adjacent opposing battery cells 11, effectively reduces misalignment of the adjacent opposing battery cells 11 in the row direction H, which could result in electrical connection failure. Furthermore, the limiting component 3 effectively reduces relative movement of the adjacent opposing battery cells 11 in the column direction L, thereby further improving the connection and overall strength of the battery 100. Furthermore, the limiting component 3 can also serve as a reinforcing rib for the reinforcing plate 2, thereby effectively enhancing the overall structural strength of the reinforcing plate 2.

[0078] In some embodiments, as Figure 4 and Figure 5 As shown, the limiting component 3 may include two parallel and oppositely arranged vertical walls 31, the vertical wall 31 is vertically connected to the reinforcing plate 2, and the vertical wall 31 is parallel to the end cover 112 of the battery cell 11; wherein, a first preset distance E1 is set between the vertical wall 31 and the end cover 112.

[0079] The vertical wall 31 mentioned in the embodiments of the present application refers to a wall surface perpendicular to the reinforcing plate 2. It can be integrally formed with the reinforcing plate 2 or a separate plate portion fixed to the reinforcing plate 2. The first predetermined distance E1 mentioned in the embodiments of the present application can be configured as a gap formed between the vertical wall 31 and the end caps of the battery cells 11. In this embodiment, the parallelism of the limiting component 3 and the end caps 112 between adjacent battery cells 11 can improve the control accuracy of the gap between the vertical wall 31 and the end caps 112.

[0080] In some embodiments, as Figure 4 and Figure 5 As shown, the limiting component 3 may further include a transverse wall 32 , which is used to connect the two vertical walls 31 ; wherein a second preset distance E2 is set between the transverse wall 32 and the electrode terminal 113 of the battery cell 11 .

[0081] The transverse wall 32 mentioned in the embodiments of the present application refers to a wall surface used to connect the two vertical walls 31. It can be formed integrally with the reinforcing plate 2 or as a separate plate portion that fixedly connects the two vertical walls 31. The second predetermined distance E2 mentioned in the embodiments of the present application can be configured as a gap formed between the transverse wall 32 and the electrode terminal 113 of the battery cell 11. In this embodiment, the provision of the transverse wall 32 to connect the two vertical walls 31 improves the overall strength of the two vertical walls 31 of the limiting component 3.

[0082] In some embodiments, the first preset distance E1 and the second preset distance E2 range from 1 mm to 3 mm, preferably 1.5 mm. This arrangement creates a gap that, on the one hand, facilitates the insertion of the limiting component 3 into the electrical connection area B, while, on the other hand, effectively preventing the limiting component 3 from contacting or interfering with the end cap 112 and electrode terminal 113 of the battery cell 11, thereby affecting the electrical performance of the battery 100. This preset distance is particularly necessary when the limiting component 3 is made of a conductive material. Furthermore, the relatively small gap can limit excessive relative movement between the two battery cells 11.

[0083] In some embodiments, combined Figure 6 and Figure 7 As shown, the reinforcing plate 2 may be formed with a plurality of receiving grooves 21, each of which extends along the column direction L and is continuously arranged along the row direction H. The receiving grooves 21 are used to mount the battery cells 11. The receiving grooves 21 are configured to fit the surface of the battery cells 11.

[0084] The accommodating groove 21 mentioned in the embodiment of the present application refers to a groove that can be used to install the battery cell 11 and can partially cover the outer wall of the battery cell 11. The accommodating groove 21 mentioned in the embodiment of the present application extends along the column direction L, which means that the accommodating groove 21 can be a through groove, or a non-through groove with limits formed at both ends. The accommodating grooves 21 mentioned in the embodiment of the present application are arranged continuously along the row direction H, which means that adjacent accommodating grooves 21 can be directly connected or connected through a connecting surface. The adaptation mentioned in the embodiment of the present application means that the formation of the accommodating groove 21 can be adapted according to the shape of the battery cell 11. For example, it can be used to install a battery cell 11 with a cylindrical structure, and can also be used to install a battery cell 11 with a rectangular structure. It is only necessary to construct the accommodating groove 21 as a matching arc groove or rectangular groove.

[0085] Through the above-mentioned arrangement, on the one hand, the formed accommodating groove 21 is adapted to the surface of the battery cell 11, so that the reinforcing plate 2 can fit better with the surface of the shell 111 of the battery cell 11, thereby improving not only the fixing strength in the column direction L but also the connection area between the reinforcing plate 2 and the shell 111 of the battery cell 11, thereby improving the arrangement strength between multiple battery cells in the row direction H; on the other hand, the formed accommodating groove 21 can also be further constructed as a reinforcing rib of the reinforcing plate 2 to further improve the overall structural strength of the reinforcing plate 2.

[0086] In some embodiments, combined Figure 6 As shown, each receiving groove 21 may further include a rib structure 211 extending along the row direction L. The rib structure 211 mentioned in the embodiments of the present application may be configured as, but is not limited to, a flat surface formed at the bottom of the receiving groove 21, extending along the row direction L. The provision of the rib structure 211 can further improve the precision of the fit with the surface of the battery cell 100, thereby enhancing the positioning accuracy; it can also further enhance the strength of the reinforcing plate 2 itself, thereby improving the overall connection strength of the battery 100.

[0087] In some embodiments, combined Figure 8 and Figure 9 As shown, the battery 100 may include: a multi-layer battery cell matrix 1, each layer of the battery cell matrix 1 is stacked and arranged along the vertical direction G, and the reinforcing plate 2 is arranged on the top surface of the multi-layer battery cell matrix 1; an intermediate support plate 4, the intermediate support plate 4 is arranged between adjacent battery cell matrices 1, and is used to support and / or cool the battery cells 11; and a reinforcing bottom plate 5, the reinforcing bottom plate 5 is arranged on the bottom surface of the multi-layer battery cell matrix 1; wherein the reinforcing bottom plate 5 is constructed as: a rectangular plate structure with a row direction H and a column direction L, and is fixed to the shell 111 of the battery cell 11 of the battery cell matrix 1 of the bottom layer.

[0088] The multi-layer battery cell matrix 1 mentioned in the embodiments of this application refers to a flat-lying battery cell matrix 1, for example, in which multiple battery cell matrices 1 are stacked vertically. The intermediate support plate 4 mentioned in the embodiments of this application can be a plate portion solely for support, or it can be a cooling component or cooling plate for thermal management. The reinforcing base plate 5 mentioned in the embodiments of this application can be made of a metal material. The reinforcing base plate 5 can be made of aluminum or rigid plastic. The reinforcing base plate 5 can be formed by stamping or injection molding. The reinforcing base plate 5 can be fixedly connected to the housing 111 of the battery cell 11 by bonding. The reinforcing base plate 5 can be configured as a strip plate similar to the reinforcing plate 2, or it can be constructed by directly connecting at least two reinforcing members 2 in the column direction L to form an integral structure. Configuring the reinforcing base plate 5 as a larger plate can further enhance the rigidity and strength of the reinforcing base plate 5 itself. When the reinforcing base plate 5 is positioned at the bottom of the battery 100, it can provide further support to the battery 100.

[0089] In this embodiment, Figure 8 As shown, taking a flat-lying battery cell matrix 1 as an example, the battery 100 of this embodiment is provided with multiple layers of battery cell matrices 1, and an intermediate support plate 4 is provided between adjacent battery cell matrices 1 to support and / or cool the battery cells 11. The reinforcing plate 2 mentioned above is provided on the top surface of the multiple layers of battery cell matrix 1 to improve the strength of the fixed connection of the battery cell matrix 1 on the top layer. In this embodiment, a reinforcing bottom plate 5 is also provided, and the reinforcing bottom plate 5 is fixed to the housing 111 of the battery cells 11 of the battery cell matrix 1 on the bottom layer. Through this arrangement, the reinforcing bottom plate 5 has the same effect of improving the strength of the fixed connection as the reinforcing plate 2. At the same time, because it is provided at the bottom of the battery 100 and is provided in a rectangular plate-like structure with a row direction H and a column direction L, it has a certain supporting effect, thereby making the overall structure of the battery 100 more stable.

[0090] In some embodiments, combined Figure 9As shown, the intermediate support plate 4 and / or the reinforcing bottom plate 5 may be formed with: a limiting component 3; and / or a receiving groove 21; and / or a rib structure 211. The embodiment of the present application mentions that the limiting component 3 and / or the receiving groove 21 and / or the rib structure 211 may be formed on the intermediate support plate 4 and / or the reinforcing bottom plate 5, which means that the limiting component 3, the receiving groove 21, and the rib structure 211 may be formed on the intermediate support plate 4 and / or the reinforcing bottom plate 5 in the same manner as described above. Through this arrangement, on the one hand, the limiting components 3, accommodating grooves 21 and rib structures 211 formed on the intermediate support plate 4 and / or the reinforcing bottom plate 5 have the same technical effects as the limiting components 3, accommodating grooves 21 and rib structures 211 described above. Since their technical effects are the same, they will not be repeated here; on the other hand, the limiting components 3, accommodating grooves 21 and rib structures 211 formed on the intermediate support plate 4 and / or the reinforcing bottom plate 5 can also limit the relative movement of adjacent (including upper and lower layers, column direction L and row direction H) battery cells 11, thereby maintaining the consistency of the connection and arrangement position of the battery cells 11 in the battery 100.

[0091] In some embodiments, the thickness of the reinforcing plate 2 and / or the reinforcing base plate 5 may range from 0.5 mm to 2 mm. With this configuration, while still meeting strength requirements, using thinner reinforcing plates 2 and / or reinforcing base plates 5 can reduce the overall volume of the battery 100 and thereby increase the energy density of the battery 100.

[0092] The embodiment of the present invention further proposes an electrical device, comprising the battery 100 described in the above embodiment, wherein the battery 100 is used to provide electrical energy. The battery 100 described in the embodiment of the present application is applicable to various electrical devices using the battery 100, such as mobile phones, portable devices, laptop computers, electric vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0093] Combined with the above Figures 1 to 9 The battery 100 of the embodiment of the present application is described below. Figure 10 The battery manufacturing method 200 and the manufacturing device 300 of the embodiment of the present application are described. For the parts not described in detail, reference can be made to the aforementioned embodiments.

[0094] Specifically, Figure 10A flowchart of a battery preparation method 200 is provided, including: S01: providing a plurality of battery cells 11, wherein the plurality of battery cells 11 are arranged in M ​​rows and N columns to form a battery cell matrix 1, wherein the battery cells 11 include a shell 111, an end cover 112 and two electrode terminals 113, wherein the electrode terminals 113 are respectively arranged on the two end covers 112 of the battery cells 11 along the column direction L, and in the column direction, two adjacent battery cells 11 are connected in an opposing manner through the electrode terminals 113, wherein M and N are integers, and M≥2, N≥2; and S02: providing at least one reinforcing plate 2, wherein the at least one reinforcing plate 2 extends along the row direction H and is fixed to the shells 111 of the battery cells 11 in the N columns; and the size of the at least one reinforcing plate 2 along the column direction L is smaller than the size of the battery in the column direction, and is fixed to the shells 111 of the battery cells 11 in two adjacent rows in the M rows.

[0095] Specifically, combined Figure 1 As shown, the battery cells 11 in the battery cell matrix 1 can be arranged in two forms: one is that the direction L of the column is vertical, that is, the adjacent battery cells 11 in the same column are connected oppositely in a "standing" form, and the connection points of the adjacent battery cells 11 are fixedly connected (for example, welded) to form a battery cell column, and then arranged in the transverse direction, so as to construct a battery cell matrix 1 in which all the battery cells 11 are standing; the other is Figure 1The direction L of the column shown is the transverse direction, that is, adjacent battery cells 11 in the same column are connected in a "lying" position, and the connections of adjacent battery cells 11 are fixedly connected (for example, welded) to form a battery cell column, which is then arranged in the transverse direction to construct a battery cell matrix 1 in which all battery cells 11 are lying flat. In the present application, taking the lying battery cell matrix 1 as an example, the battery 100 according to the embodiment of the present application also includes at least one reinforcing plate 2. Taking the minimum unit M=2 and N=2 as an example, when M and N are the minimum unit 2, the battery 100 includes one reinforcing plate 2. When the reinforcing plate 2 is in use, the reinforcing plate 2 extends along the row direction H and is fixed to the housing 111 of the battery cells 11 in two columns and two rows. In this way, the reinforcing plate 2 can completely cover the connection between adjacent battery cells 11 through the electrode terminals 113, and at the same time, the reinforcing plate 2 is fixedly connected to the housing 111 of the battery cell 11. Through this arrangement, the fixedly connected reinforcing plate 2 can securely connect and position the housings 111 of two adjacent, opposing battery cells 11. When the battery 100 is in use and environmental vibrations are transmitted to the battery 100, the reinforcing plate 2 can effectively reduce the relative movement between the housings 111 of adjacent battery cells 11, thereby effectively improving the strength of the fixed connection of the battery cells 11, thereby effectively improving the stability of the connection of the battery 100 and extending the service life of the battery 100. In addition, the reinforcing plate 2 covering the outer area of ​​the electrical connection between the two adjacent battery cells 11 can also prevent external foreign matter from entering the electrical connection area, protecting the electrical connection of the battery 100 from short circuits or open circuits caused by foreign matter, and enhancing the safety of the battery 100.

[0096] In some embodiments, the method further includes providing a plurality of reinforcing plates 2, which are spaced apart along the row direction L. This arrangement allows for the fixed connection of the housings 111 of all adjacent, opposing battery cells 11, without requiring a single plate to be simply fixed. While ensuring sufficient strength, the minimum plate area is utilized, effectively improving the connection strength of each joint after fixed connection, reducing the overall volume of the battery 100, and increasing the energy density of the battery 100.

[0097] In some embodiments, the following also includes: in the column direction L, after two adjacent battery cells 11 are opposed through the electrode terminals 113, an electrical connection area B is formed between the opposing end caps 112 of the two adjacent battery cells 11, and each reinforcing plate 2 is respectively configured to cover the electrical connection area B between the battery cells 11 in two adjacent rows in the M rows, wherein, along the column direction L, the electrical connection area B has a first width, and the reinforcing plate 2 has a second width, and the second width is greater than the first width in the range of 20mm-100mm. In this embodiment, the reinforcing plate 2 does not need to completely cover the battery cell 11, and only needs to cover the electrical connection area B within a certain size range. In this way, the reinforcing plate 2 not only improves the strength of the fixed connection between the adjacent opposing battery cells 11, but also saves the material used for the reinforcing plate 2 and reduces the manufacturing cost of the reinforcing plate 2.

[0098] In some embodiments, the present invention further includes a retaining member 3 disposed on the side of the reinforcing plate 2 that mates with the battery cells 11. The retaining member 3 extends along the row direction H, and is located within the electrical connection area B between two adjacent rows of battery cells 11 within the M rows. In this embodiment, the retaining member 3 located within the electrical connection area B effectively fills this recessed area. Thus, when the battery 100 is in use and vibrations generated in the environment are transmitted to the battery 100, the reinforcing plate 2, by securing it to the housings 111 of adjacent opposing battery cells 11, effectively reduces misalignment of the adjacent opposing battery cells 11 in the row direction H, which could cause electrical connection failure. Furthermore, the retaining member 3 effectively reduces relative movement of the adjacent opposing battery cells 11 in the column direction L, thereby further improving the connection and overall strength of the battery 100. Furthermore, the retaining member 3 can also be configured as a rib on the reinforcing plate 2, thereby effectively improving the overall structural strength of the reinforcing plate 2.

[0099] In some embodiments, the present invention includes: providing a multi-layer battery cell matrix 1, wherein the multi-layer battery cell matrix 1 is stacked in a vertical direction, and a reinforcing plate 2 is arranged on the top surface of the multi-layer battery cell matrix 1; providing an intermediate support plate 4, wherein the intermediate support plate 4 is arranged between adjacent battery cell matrices 1; and providing a reinforcing bottom plate 5, wherein the reinforcing bottom plate 5 is arranged on the bottom surface of the multi-layer battery cell matrix 1; wherein the reinforcing bottom plate 5 is constructed as a rectangular plate structure having a row direction H and a column direction L, and is fixed to the housing 111 of the battery cell 11 of the bottom battery cell matrix 1. In this embodiment, as Figure 2As shown, taking a flat-lying battery cell matrix 1 as an example, the battery 100 of this embodiment is provided with multiple layers of battery cell matrices 1, and an intermediate support plate 4 is provided between adjacent battery cell matrices 1 to support and / or cool the battery cells 11. The reinforcing plate 2 mentioned above is provided on the top surface of the multiple layers of battery cell matrix 1 to improve the strength of the fixed connection of the battery cell matrix 1 on the top layer. In this embodiment, a reinforcing bottom plate 5 is also provided, and the reinforcing bottom plate 5 is fixed to the housing 111 of the battery cells 11 of the battery cell matrix 1 on the bottom layer. Through this arrangement, the reinforcing bottom plate 5 has the same effect of improving the strength of the fixed connection as the reinforcing plate 2. At the same time, because it is provided at the bottom of the battery 100 and is provided in a rectangular plate-like structure with a row direction H and a column direction L, it has a certain supporting effect, thereby making the overall structure of the battery 100 more stable.

[0100] Figure 11 A structural schematic diagram of a battery preparation device 300 is provided, including: a battery cell preparation module 301, used to prepare a plurality of battery cells 11, wherein the plurality of battery cells 11 are arranged in M ​​rows and N columns to form a battery cell matrix 1, the battery cell 11 including a shell 111, an end cover 112 and two electrode terminals 113, the electrode terminals 113 are respectively arranged on the two end covers 112 of the battery cell 11 along the column direction L, and in the column direction, two adjacent battery cells 11 are connected in an opposing manner by the electrode terminals 113, wherein M and N are integers, and M≥2, N≥2; and a reinforcement plate preparation module 302, used to prepare at least one reinforcement plate 2, wherein the at least one reinforcement plate 2 extends along the row direction H and is fixed to the shell 111 of the battery cells 11 in N columns; and the size of the at least one reinforcement plate 2 along the column direction L is smaller than the size of the battery in the column direction, and is fixed to the shell 111 of the battery cells 11 in two adjacent rows in the M rows.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: A battery cell matrix (1), the battery cell matrix (1) comprising a plurality of battery cells (11) arranged in M ​​rows and N columns, the battery cells (11) comprising a housing (111), an end cap (112), and two electrode terminals (113), the electrode terminals (113) being respectively arranged on the two end caps (112) of the battery cells (11) along a column direction, and two adjacent battery cells (11) in the column direction being connected in an opposing manner via the electrode terminals (113), wherein M and N are integers, and M≥2, N≥2; and At least one reinforcing plate (2), the at least one reinforcing plate (2) extending in the direction of the row and fixed to the housings (111) of the battery cells (11) in the N rows; and the at least one reinforcing plate (2) having a dimension in the direction of the row smaller than a dimension of the battery in the direction of the row, and fixed to the housings (111) of the battery cells (11) in two adjacent rows among the M rows; a limiting component (3), the limiting component (3) being arranged on a side of the reinforcing plate (2) in contact with the battery cell (11), the limiting component (3) extending in the direction of the row, and the limiting component (3) being located in an electrical connection area between two adjacent rows of battery cells (11) in the M rows, the limiting component (3) comprising a transverse wall (32) and two parallel and oppositely arranged vertical walls (31), the vertical wall (31) being vertically connected to the reinforcing plate (2), and the vertical wall (31) being parallel to the end cover (112) of the battery cell (11), and the transverse wall (32) being used to connect the two vertical walls (31); A first preset distance is provided between the vertical wall (31) and the end cover (112), and a second preset distance is provided between the transverse wall (32) and the electrode terminal (113) of the battery cell (11), wherein the first preset distance and the second preset distance have a size range of 1 mm to 3 mm.

2. The battery according to claim 1, characterized in that The battery comprises a plurality of reinforcing plates (2), and the plurality of reinforcing plates (2) are arranged at intervals along the direction of the column.

3. The battery according to claim 2, characterized in that In the direction of the column, after two adjacent battery cells (11) are opposed via the electrode terminals (113), an electrical connection area is formed between the opposite end covers (112), and each of the reinforcing plates (2) is respectively configured to cover the electrical connection area between the battery cells (11) in two adjacent rows in the M rows, wherein, along the direction of the column, the electrical connection area has a first width, and the reinforcing plate (2) has a second width, and the second width is greater than the first width in a range of 20 mm to 100 mm.

4. The battery according to claim 1, characterized in that A plurality of accommodating grooves (21) are formed on the reinforcing plate (2), each of the accommodating grooves (21) extending in the direction of the column and arranged continuously in the direction of the row, and the accommodating grooves (21) are used to install the battery cells (11), wherein the accommodating grooves (21) are configured to match the surface of the battery cells (11).

5. The battery according to claim 4, characterized in that A rib structure (211) is also formed in each of the accommodating grooves (21), and the rib structure (211) extends along the direction of the column.

6. The battery according to claim 5, characterized in that The battery comprises: Multiple layers of the battery cell matrix (1), each layer of the battery cell matrix (1) is stacked and arranged in a vertical direction, and the reinforcing plate (2) is arranged on the top surface of the multiple layers of the battery cell matrix (1); an intermediate support plate (4), the intermediate support plate (4) being arranged between adjacent battery cell matrices (1) and being used to support and / or cool the battery cells (11); and A reinforcing base plate (5), the reinforcing base plate (5) being arranged on the bottom surface of the multi-layer battery cell matrix (1); The reinforcing bottom plate (5) is constructed as a rectangular plate structure having the row direction and the column direction, and is fixed to the housing (111) of the battery cell (11) of the battery cell matrix (1) at the bottom layer.

7. The battery according to claim 6, characterized in that The intermediate support plate (4) and / or the reinforcing bottom plate (5) are formed with: the limiting component (3); and / or the accommodating groove (21); and / or the rib structure (211).

8. The battery according to claim 6 or 7, characterized in that The thickness of the reinforcing plate (2) and / or the reinforcing bottom plate (5) ranges from 0.5 mm to 2 mm.

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

10. A method for preparing a battery, characterized in that: include: A plurality of battery cells (11) are provided, wherein the plurality of battery cells (11) are arranged in M ​​rows and N columns to form a battery cell matrix (1), wherein the battery cells (11) include a housing (111), an end cover (112), and two electrode terminals (113), wherein the electrode terminals (113) are respectively arranged on the two end covers (112) of the battery cells (11) along the direction of the column, and in the direction of the column, two adjacent battery cells (11) are connected in an opposing manner through the electrode terminals (113), wherein M and N are integers, and M≥2, N≥2; and At least one reinforcing plate (2) is provided, the at least one reinforcing plate (2) extending in the direction of the row and fixed to the housings (111) of the battery cells (11) in the N rows; and the at least one reinforcing plate (2) has a dimension in the direction of the row smaller than a dimension of the battery in the direction of the row, and is fixed to the housings (111) of the battery cells (11) in two adjacent rows among the M rows; A limiting component (3) is provided, wherein the limiting component (3) is arranged on a side of the reinforcing plate (2) that is in contact with the battery cell (11), and the limiting component (3) extends in the direction of the row, wherein the limiting component (3) is located in the electrical connection area between the battery cells (11) of two adjacent rows in the M rows, and the limiting component (3) includes a transverse wall (32) and two parallel and oppositely arranged vertical walls (31), wherein the vertical wall (31) is vertically connected to the reinforcing plate (2), and the vertical wall (31) is parallel to the end cover (112) of the battery cell (11), and the transverse wall (32) is used to connect the two vertical walls (31); A first preset distance is provided between the vertical wall (31) and the end cover (112), and a second preset distance is provided between the transverse wall (32) and the electrode terminal (113) of the battery cell (11), wherein the first preset distance and the second preset distance have a size range of 1 mm to 3 mm.

11. The preparation method according to claim 10, characterized in that: A plurality of the reinforcing plates (2) are provided, and the plurality of the reinforcing plates (2) are arranged at intervals along the direction of the column.

12. The preparation method according to claim 11, characterized in that Also includes: In the direction of the column, after the two adjacent battery cells (11) are opposed to each other through the electrode terminals (113), an electrical connection area is formed between the opposite end covers (112) of the two adjacent battery cells (11), and each of the reinforcing plates (2) is respectively configured to cover the electrical connection area between the battery cells (11) in two adjacent rows in the M rows, wherein, along the direction of the column, the electrical connection area has a first width, and the reinforcing plate (2) has a second width, and the second width is greater than the first width in a range of 20-100 mm.

13. The preparation method according to any one of claims 10 to 12, characterized in that: include: Providing multiple layers of the battery cell matrix (1), wherein the multiple layers of the battery cell matrix (1) are stacked in a vertical direction, and the reinforcing plate (2) is arranged on the top surface of the multiple layers of the battery cell matrix (1); Providing an intermediate support plate (4), wherein the intermediate support plate (4) is arranged between adjacent battery cell matrices (1); and A reinforcing base plate (5) is provided, the reinforcing base plate (5) being arranged on the bottom surface of the multi-layer battery cell matrix (1); wherein the reinforcing base plate (5) is constructed as a rectangular plate-shaped structure having the row direction and the column direction, and is fixed to the housing (111) of the battery cell (11) of the battery cell matrix (1) at the bottom layer.

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