Battery, electrical device, method and equipment for preparing a battery

Abstract

Provided are a battery, an electrical device, a method and a device for manufacturing a battery. The battery includes: a plurality of battery cells arranged in a first direction, the battery cell including a first wall and a second wall, the first wall being the wall with the largest surface area in the battery cell, and the second wall being connected to the first wall; a separator, the separator extending in the first direction and connected to the first wall of each of the plurality of battery cells; a mounting wall, the mounting wall being connected to the second wall of each of the plurality of battery cells, wherein when the battery cell is disposed in the electrical device, the battery cell is located below the mounting wall, and the mounting wall is used for mounting the battery cell. The technical solution of the present application can improve the performance of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery, an electrical device, a method and an apparatus for manufacturing a battery. Background Art

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

[0003] The space utilization rate inside the battery affects the structural strength and energy density of the battery, and thus affects the performance of the battery. How to improve the performance of the battery is an urgent technical problem in battery technology. Summary of the Invention

[0004] Embodiments of the present application provide a battery, an electrical device, a method and an apparatus for manufacturing a battery, which can improve the structural strength and energy density of the battery, thereby improving the performance of the battery.

[0005] In a first aspect, a battery is provided, including: a plurality of battery cells arranged along a first direction, each battery cell including a first wall and a second wall, the first wall being the wall with the largest surface area in the battery cell, and the second wall being connected to the first wall; a separator, the separator extending along the first direction and connected to the first wall of each battery cell among the plurality of battery cells; a mounting wall, the mounting wall being connected to the second wall of each battery cell among the plurality of battery cells, wherein when the battery cell is disposed in an electrical device, the battery cell is located below the mounting wall, and the mounting wall is used for mounting the battery cell.

[0006] In the embodiments of the present application, a separator is disposed in the battery and connected to the first wall with the largest surface area of each battery cell in a column of a plurality of battery cells arranged along the first direction. By connecting the plurality of battery cells into a whole through the separator, in this case, side plates may not be provided inside the battery, and structures such as beams may not be required either, which can greatly improve the space utilization rate inside the battery, and improve the structural strength and energy density of the battery; a mounting wall is also disposed in the battery and connected to the second wall of each battery cell in a row of a plurality of battery cells arranged along the first direction. The second wall is connected to the first wall. When the battery cell is disposed in an electrical device, the battery cell is located below the mounting wall and mounted on the mounting wall. In this way, the second wall of the battery cell is directly connected to the mounting wall, and no space needs to be left between the mounting wall and the battery cell, further improving the space utilization rate inside the battery, increasing the energy density of the battery, and at the same time, the battery cell is mounted on the mounting wall, which can improve the structural strength of the battery. Therefore, the technical solution of the embodiments of the present application can improve the performance of the battery.

[0007] In a possible implementation, an electrode terminal is provided on the third wall of the battery cell. The third wall is separated from and opposite to the second wall in a second direction, and the second direction is perpendicular to the second wall; alternatively, the third wall is connected to the second wall, and the first direction is perpendicular to the third wall.

[0008] The electrode terminal is disposed on the third wall. The third wall is opposite to the second wall in the second direction, and the second direction is perpendicular to the second wall. Alternatively, the third wall is connected to the second wall, and the first direction is perpendicular to the third wall. That is, the electrode terminal is disposed on the wall of the non-mounting wall. In this way, no space needs to be reserved between the battery cell and the mounting wall for the electrode terminal, so that the space utilization rate inside the battery can be maximally improved, and the energy density of the battery can be increased.

[0009] In a possible implementation, the separator is a metal material plate. This can ensure the strength of the separator.

[0010] In a possible implementation, an insulating layer is provided on the surface of the separator. By providing an insulating layer on the surface of the separator, the surface of the separator connected to the first wall can be an insulating surface.

[0011] In a possible implementation, the separator is a non-metal material plate.

[0012] In a possible implementation, a first cavity is provided inside the separator. The first cavity can reduce the weight of the separator while ensuring the strength of the separator. In addition, the first cavity can enable the separator to have a large compression space in the direction perpendicular to the first wall, so as to provide a large expansion space for the battery cell.

[0013] In a possible implementation, the first cavity is used to accommodate a fluid to adjust the temperature of the battery cell, so that the temperature of the battery cell can be effectively managed.

[0014] In a possible implementation, the size T1 of the separator in the third direction is 0.1 - 100 mm, and the third direction is perpendicular to the first wall. When the size T1 of the separator in the third direction is too small, the stiffness of the separator is poor and it cannot effectively improve the structural strength of the battery. When the size T1 of the separator in the third direction is too large, it will occupy too much space inside the battery, which is not conducive to improving the energy density of the battery. Therefore, the size T1 of the separator in the third direction is set to 0.1 - 100 mm, so that both the energy density of the battery can be guaranteed and the structural strength of the battery can be improved.

[0015] In a possible implementation, the dimension T1 of the separator in the third direction and the dimension T2 of the battery cell in the third direction satisfy: 0 < T1 / T2 ≤ 7. This can ensure the energy density of the battery and ensure the safety performance of the battery.

[0016] In a possible implementation, 0 < T1 / T2 ≤ 1 to further improve the energy density of the battery and ensure the safety performance of the battery.

[0017] In a possible implementation, the weight M1 of the separator and the weight M2 of the battery cell satisfy: 0 < M1 / M2 ≤ 20. This can ensure the weight energy density of the battery and ensure the safety performance of the battery.

[0018] In a possible implementation, 0.1 ≤ M1 / M2 ≤ 1 to further improve the energy density of the battery and ensure the safety performance of the battery.

[0019] In a possible implementation, the area S1 of the surface of the separator connected to the first wall of the plurality of battery cells and the area S2 of the first wall satisfy: 0.2 ≤ S1 / S2 ≤ 30. This can ensure the energy density of the battery and ensure the safety performance of the battery.

[0020] In a possible implementation, 2 ≤ S1 / S2 ≤ 10 to further improve the energy density of the battery and ensure the safety performance of the battery.

[0021] In a possible implementation, the specific heat capacity Q of the separator and the weight M1 of the separator satisfy: 0.02 KJ / (kg 2 / ℃) ≤ Q / M1 ≤ 100 KJ / (kg 2 / ℃). When Q / M1 < 0.02 KJ / (kg 2 / ℃), the separator will absorb more energy, causing the temperature of the battery cell to be too low and possibly resulting in lithium plating; when Q / M1 > 100 KJ / (kg 2 / ℃), the heat conduction ability of the separator is poor and it cannot take away heat in time. When 0.02 KJ / (kg 2 / ℃) ≤ Q / M1 ≤ 100 KJ / (kg 2 / ℃), the safety performance of the battery can be ensured.

[0022] In a possible implementation, 0.3 KJ / (kg 2 / ℃) ≤ Q / M1 ≤ 20 KJ / (kg 2 / ℃) to further improve the safety performance of the battery.

[0023] In a possible implementation, a second cavity is provided inside the mounting wall. The second cavity can reduce the weight of the mounting wall while ensuring its strength. Additionally, the second cavity can provide a relatively large compression space in the direction perpendicular to the second wall for the battery cell, thereby providing a relatively large expansion space for the battery cell.

[0024] In a possible implementation, the second cavity is used to accommodate a fluid for regulating the temperature of the battery cell, which can effectively manage the temperature of the battery cell.

[0025] In a possible implementation, the battery further includes a reinforcing rib, which is disposed on the surface of the mounting wall away from the battery cell along the second direction, and the second direction is perpendicular to the second wall. This reinforcing rib can increase the strength of the mounting wall.

[0026] In a possible implementation, the reinforcing rib and the mounting wall are of an integrally formed structure, which is easy to process and assemble.

[0027] In a possible implementation, the battery includes multiple battery cells arranged in multiple columns along the first direction and multiple separators, wherein the multiple columns of battery cells and the multiple separators are alternately arranged in the third direction, and the third direction is perpendicular to the first wall. In this way, the multiple columns of battery cells and the multiple separators are connected to form a whole and are accommodated in the box body, which can ensure the structural strength of the whole battery, thereby improving the performance of the battery.

[0028] In a possible implementation, the battery includes multiple battery modules, each battery module includes at least one column of multiple battery cells arranged along the first direction and at least one separator, and at least one column of battery cells and at least one separator are alternately arranged in the third direction, and the third direction is perpendicular to the first wall.

[0029] In a possible implementation, the battery module includes N columns of battery cells and N - 1 separators, and the separators are disposed between adjacent two columns of battery cells, where N is an integer greater than 1. In this way, fewer separators can be provided in the battery, but at the same time, it can be ensured that each battery cell can be connected to the separator.

[0030] In a possible implementation, multiple battery modules are arranged along the third direction, and there is a gap between adjacent battery modules. This gap can provide an expansion space for the battery cell.

[0031] In a possible implementation, a fixing structure is provided at the end of the separator in the first direction, and the separator is fixed to the mounting wall through the fixing structure, which can improve the structural strength of the battery.

[0032] In a possible implementation, the partition is bonded to the first wall.

[0033] In a possible implementation, the mounting wall is bonded to the second wall.

[0034] In a second aspect, an electrical device is provided, including: the battery in the first aspect or any possible implementation of the first aspect, where the battery is configured to provide electrical energy.

[0035] In a third aspect, a method for manufacturing a battery is provided, including: providing a plurality of battery cells arranged along a first direction, where the battery cells include a first wall and a second wall, the first wall is the wall with the largest surface area in the battery cell, and the second wall is connected to the first wall; providing a partition, where the partition extends along the first direction and is connected to the first wall of each of the plurality of battery cells; providing a mounting wall, where the mounting wall is connected to the second wall of each of the plurality of battery cells, and when the battery cells are disposed in the electrical device, the battery cells are located below the mounting wall, and the mounting wall is configured to mount the battery cells.

[0036] In a fourth aspect, a device for manufacturing a battery is provided, including a module for executing the method in the third aspect.

[0037] In the embodiments of the present application, a partition is provided in the battery and connected to the first wall with the largest surface area of each of a plurality of battery cells arranged in a column along the first direction. The plurality of battery cells are connected into a whole through the partition. In this case, side plates may not be provided inside the battery, and structures such as beams may not be required either, which can greatly improve the space utilization rate inside the battery, and improve the structural strength and energy density of the battery; a mounting wall is also provided in the battery and connected to the second wall of each of the plurality of battery cells arranged along the first direction. The second wall is connected to the first wall. When the battery cells are disposed in the electrical device, the battery cells are located below the mounting wall and mounted on the mounting wall. In this way, the second wall of the battery cell is directly connected to the mounting wall, and no space needs to be left between the mounting wall and the battery cell, further improving the space utilization rate inside the battery, increasing the energy density of the battery, and at the same time, the battery cells are mounted on the mounting wall, which can improve the structural strength of the battery. Therefore, the technical solution of the embodiments of the present application can improve the performance of the battery. Description of the Drawings

[0038] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments of the present application. Obviously, the following described accompanying drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on the accompanying drawings.

[0039] Figure 1 It is a schematic structural diagram of a vehicle disclosed in an embodiment of the present application;

[0040] Figure 2 It is an exploded structural diagram of a battery disclosed in an embodiment of the present application;

[0041] Figure 3 It is a schematic structural diagram of a battery cell disclosed in an embodiment of the present application;

[0042] Figure 4 It is a schematic structural diagram of a battery disclosed in an embodiment of the present application;

[0043] Figure 5 It is a partial schematic diagram of a battery disclosed in an embodiment of the present application;

[0044] Figure 6 It is a schematic diagram of a separator and an insulating layer disclosed in an embodiment of the present application;

[0045] Figure 7 It is a schematic diagram of a separator with a cavity disclosed in an embodiment of the present application;

[0046] Figure 8 It is a schematic diagram of a mounting wall disclosed in an embodiment of the present application;

[0047] Figure 9 It is a schematic diagram of a reinforcing rib disclosed in an embodiment of the present application;

[0048] Figure 10 It is a schematic structural diagram of a battery disclosed in an embodiment of the present application;

[0049] Figure 11 It is a schematic diagram of a method for manufacturing a battery disclosed in an embodiment of the present application;

[0050] Figure 12 It is a schematic diagram of a device for manufacturing a battery disclosed in an embodiment of the present application.

[0051] In the accompanying drawings, the drawings are not drawn to actual scale. Detailed implementation manners

[0052] The following further describes the embodiments of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0053] In the description of the present application, it should be noted that unless otherwise specified, all technical and scientific terms used have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the description, claims and drawings of the present application are intended to cover non-exclusive inclusion; the meaning of "a plurality" is more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship 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 thus cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0054] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application may be combined with other embodiments.

[0055] The orientation words appearing in the following description are all the directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0056] In this application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In this application, the battery cell can include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of this application do not limit this. The battery cell can be in a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc., and the embodiments of this application also do not limit this. Generally, the battery cell is divided into three types according to the encapsulation method: a cylindrical battery cell, a square battery cell, and a soft-pack battery cell, and the embodiments of this application also do not limit this.

[0058] The battery mentioned in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in this application can include a battery pack, etc. The battery generally includes a box body for encapsulating one or more battery cells. The box body can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0059] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer, and the current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer, and the current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without fusing, 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 separator can be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited thereto.

[0060] To meet different power demands, a battery may include multiple battery cells. Among them, the multiple battery cells can be connected in series, parallel, or a combination of both (mixed connection, which means a combination of series and parallel). Optionally, the multiple battery cells can first be connected in series, parallel, or in a mixed connection to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed connection to form a battery. That is to say, the multiple battery cells can directly form a battery, or they can first form a battery module, and then the battery modules form a battery. The battery is further arranged in an electrical device to provide electrical energy for the electrical device.

[0061] The development of battery technology needs to consider various design factors simultaneously. For example, energy density, cycle life, discharge capacity, charge-discharge rate, safety, etc. Among them, when the internal space of the battery is fixed, improving the utilization rate of the internal space of the battery is an effective means to increase the energy density of the battery. However, while improving the utilization rate of the internal space of the battery, it may reduce the structural strength of the battery. For example, beams for mounting battery modules are usually arranged inside the battery box, and in addition, side plates and end plates are also arranged for the battery modules in the battery. The above-mentioned beams, side plates, and end plates not only fix the battery but also occupy the internal space of the battery. However, if the beams, side plates, and end plates are not provided, the structural strength of the battery will be insufficient, affecting the performance of the battery.

[0062] In view of this, the embodiments of the present application provide a technical solution. In the embodiments of the present application, a partition is arranged in the battery and connected to the first wall with the largest surface area of each battery cell in a row of multiple battery cells arranged along the first direction. The multiple battery cells are connected into a whole through the partition. In this case, side plates may not need to be arranged inside the battery, and structures such as beams may not be required either, which can greatly improve the utilization rate of the internal space of the battery, enhance the structural strength and energy density of the battery; a mounting wall is also arranged in the battery and connected to the second wall of each battery cell in a row of multiple battery cells arranged along the first direction. The second wall is connected to the first wall. When the battery cell is arranged in an electrical device, the battery cell is located below the mounting wall and mounted on the mounting wall. In this way, the second wall of the battery cell is directly connected to the mounting wall, and no space needs to be left between the mounting wall and the battery cell, further improving the utilization rate of the internal space of the battery, increasing the energy density of the battery, and at the same time, the battery cell is mounted on the mounting wall, which can improve the structural strength of the battery. Therefore, the technical solution of the embodiments of the present application can improve the performance of the battery.

[0063] The technical solutions described in the embodiments of the present application are applicable to various devices using batteries, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, electric vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0064] It should be understood that the technical solutions described in the embodiments of this 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 of description, the following embodiments will be described by taking electric vehicles as examples.

[0065] For example, as Figure 1 shown, it is a schematic structural diagram of a vehicle 1 according to an embodiment of this 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 arranged inside the vehicle 1. The controller 30 is used to control the power supply of the battery 10 to the motor 40. For example, the battery 10 can be arranged at the bottom, the front or the rear of the vehicle 1. The battery 10 can be used for the power supply of the vehicle 1. For example, the battery 10 can be used as the operating power source of the vehicle 1 and is used for the circuit system of the vehicle 1, such as the working power consumption requirements for starting, navigation and running of the vehicle 1. In another embodiment of this application, the battery 10 can not only be used as the operating power source of the vehicle 1, but also be used as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0066] To meet different power usage requirements, the battery 10 can include multiple battery cells. For example, as Figure 2 shown, it is a schematic structural diagram of a battery 10 according to an embodiment of this application. The battery 10 can include multiple battery cells 20. The battery 10 can also include a box body 11. The inside of the box body 11 is a hollow structure, and multiple battery cells 20 are accommodated in the box body 11. For example, multiple battery cells 20 are placed in the box body 11 after being connected in parallel, in series or in a mixed connection.

[0067] Optionally, the battery 10 can also include other structures, which will not be elaborated one by one here. For example, the battery 10 can also include a busbar component, which is used to realize the electrical connection between multiple battery cells 20, such as in parallel, in series or in a mixed connection. Specifically, the busbar component can realize the electrical connection between battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electric energy of multiple battery cells 20 can be further led out through a conductive mechanism passing through the box body. Optionally, the conductive mechanism can also belong to the busbar component.

[0068] According to different power demands, the number of battery cells 20 can be set to any value. Multiple battery cells 20 can be connected in series, parallel, or a combination of series and parallel to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 forms 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, and these battery modules can be connected in series, parallel, or a combination of series and parallel.

[0069] As Figure 3 shown, a schematic structural diagram of a battery cell 20 according to an embodiment of the present application is provided. The battery cell 20 includes one or more electrode assemblies 22, a housing 211, and a cover plate 212. The housing 211 and the cover plate 212 form an outer shell or a battery case 21. The walls of the housing 211 and the cover plate 212 are both referred to as the walls of the battery cell 20. For a cuboid-shaped battery cell 20, the walls of the housing 211 include a bottom wall and four side walls. The housing 211 is determined according to the shape of the combined one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one of the surfaces of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, when the housing 211 is a hollow cuboid or cube, one of the flat surfaces of the housing 211 is an open surface, that is, this plane does not have a wall body and thus the inside and outside of the housing 211 communicate with each other. When the housing 211 can be a hollow cylinder, the end face of the housing 211 is an open surface, that is, this end face does not have a wall body and thus the inside and outside of the housing 211 communicate with each other. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0070] The battery cell 20 may further include two electrode terminals 214, and the two electrode terminals 214 can be arranged on the cover plate 212. The cover plate 212 is generally in a flat plate shape, and the two electrode terminals 214 are fixed on the flat plate 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 correspondingly provided with a connection member 23, or can also be called a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0071] As Figure 3As shown, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is the positive tab, the second tab 222a is the negative tab. The first tabs 221a of one or more electrode assemblies 22 are connected to an electrode terminal through a connecting member 23, and the second tabs 222a of one or more electrode assemblies 22 are connected to another electrode terminal through another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive tab through a connecting member 23, and the negative electrode terminal 214b is connected to the negative tab through another connecting member 23.

[0072] In the battery cell 20, according to actual usage requirements, the electrode assemblies 22 can be provided as a single one or multiple ones. As Figure 3 shown, there are 4 independent electrode assemblies 22 provided in the battery cell 20.

[0073] A pressure relief mechanism 213 can also be provided on the battery cell 20. The pressure relief mechanism 213 is used to actuate to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0074] The pressure relief mechanism 213 can be various possible pressure relief structures, and the embodiments of the present application do not limit this. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism, and the temperature-sensitive pressure relief mechanism is configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism, and the pressure-sensitive pressure relief mechanism is configured to be able to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0075] Figure 4 The structural schematic diagram of the battery 10 according to an embodiment of the present application is shown. As Figure 4 shown, the battery 10 includes a plurality of battery cells 20, a partition 101, and a mounting wall 204 arranged along the first direction x.

[0076] The first direction x is the arrangement direction of a column of battery cells 20 in the battery 10. That is to say, a column of battery cells 20 in the battery 10 is arranged along the x direction.

[0077] The battery cell 20 includes a first wall 201 and a second wall 201. The first wall 201 is the wall with the largest surface area in the battery cell 20, and the second wall 202 is connected to the first wall 201. The partition 101 extends along the first direction x and is connected to the first wall 201 of each battery cell 20 among the plurality of battery cells 20.

[0078] The battery cell 20 may include multiple walls, and the first wall 201 with the largest surface area in the battery cell 20 is connected to the separator 101. That is, the first wall 201 of the battery cell 20 faces the separator 101, that is, the first wall 201 of the battery cell 20 is parallel to the first direction x.

[0079] The separator 101 is connected to the wall with the largest surface area in the battery cell 20, that is, the first wall 201. In this way, the contact area between the separator 101 and the battery cell 20 is relatively large, which can ensure the connection strength between the separator 101 and the battery cell 20.

[0080] The mounting wall 204 is connected to the second wall 202 of each battery cell 20 among the multiple battery cells 20. When the battery cell 20 is disposed in the electrical device, the battery cell 20 is located below the mounting wall 204, and the mounting wall 204 is used to mount the battery cell 20.

[0081] The mounting wall 204 may be the upper cover of the battery box of the battery 10, or may be a part of the electrical device, such as the chassis of the vehicle 1. When the mounting wall 204 is the chassis of the vehicle 1, the second wall 202 of the battery cell 20 is connected to the mounting wall 204, that is, the second wall 202 of the battery cell 20 is connected to the chassis surface of the vehicle 1. The battery cell 20 is directly connected to the chassis surface of the vehicle. In this way, the upper cover of the battery box of the battery 10 can be not provided, saving the space occupied by the upper cover of the battery box of the battery 10, improving the space utilization rate of the battery 10, and thus improving the energy density of the battery 10.

[0082] In the embodiment of the present application, in the battery 10, the separator 101 is connected to the first wall 201 with the largest surface area of each battery cell 20 among a row of multiple battery cells 20 arranged along the first direction x. The multiple battery cells 20 are connected into a whole through the separator 101. In this case, side plates may not be provided inside the battery 10, and structures such as beams may not be required either, which can greatly improve the space utilization rate inside the battery 10, and improve the structural strength and energy density of the battery 10. The mounting wall 204 is also provided in the battery 10 and is connected to the second wall 202 of each battery cell 20 among the multiple battery cells 20 arranged along the first direction x. The second wall 202 is connected to the first wall 201. When the battery cell 20 is disposed in the electrical device, the battery cell 20 is located below the mounting wall 204 and is mounted on the mounting wall 204. In this way, the second wall 202 of the battery cell 20 is directly connected to the mounting wall 204, and no space needs to be left between the mounting wall 204 and the battery cell 20, further improving the space utilization rate inside the battery 10, increasing the energy density of the battery 10. At the same time, the battery cell 20 is mounted on the mounting wall 204, which can improve the structural strength of the battery 10. Therefore, the technical solution of the embodiment of the present application can improve the performance of the battery 10.

[0083] Optionally, in an embodiment of the present application, as Figure 5 shown in (a) of , an electrode terminal 214 is provided on a third wall 203 of the battery cell 20. The third wall 203 is spaced apart from and opposite to a second wall 202 along a second direction z, and the second direction z is perpendicular to the second wall 202.

[0084] Optionally, in another embodiment of the present application, as Figure 5 shown in (b) of , an electrode terminal 214 is provided on a third wall 203 of the battery cell 20. The third wall 203 is connected to the second wall 202, and a first direction x is perpendicular to the third wall 203.

[0085] The electrode terminal 214 is provided on the third wall 203. The third wall 203 is spaced apart from and opposite to the second wall 202 along a second direction z, and the second direction z is perpendicular to the second wall 202. Alternatively, the third wall 203 is connected to the second wall 202, and the first direction x is perpendicular to the third wall 203. That is, the electrode terminal 214 is provided on a wall of the non-mounting wall 204. In this way, no space needs to be reserved for the electrode terminal 214 between the battery cell 20 and the mounting wall 204, so that the space utilization rate inside the battery 10 can be maximally improved, and the energy density of the battery 10 can be increased.

[0086] Optionally, in an embodiment of the present application, the separator 101 may be a metal material plate. That is to say, the separator 101 is entirely made of a metal material. In this case, an insulating layer is provided on the surface of the separator 101. Optionally, the insulating layer may be an insulating film adhered to the surface of the separator 101 or insulating paint coated on the surface of the separator 101.

[0087] As Figure 6 shown, an insulating layer 102 is provided on the surface of the separator 101. Through this setting, the separator 101 being made of a metal material can ensure the strength of the separator 101, and the insulating layer 102 can make the surface of the separator 101 connected to the first wall 201 an insulating surface.

[0088] Optionally, in an embodiment of the present application, the separator 101 may be a non-metal material plate. That is to say, the separator 101 is entirely made of a non-metal insulating material.

[0089] Optionally, in an embodiment of the present application, as Figure 7 shown, a first cavity 1011 may be provided inside the separator 101. The first cavity 1011 can reduce the weight of the separator 101 while ensuring the strength of the separator 101. In addition, the first cavity 1011 can enable the separator 101 to have a larger compression space in the third direction y, so as to provide a larger expansion space for the battery cell 20.

[0090] Optionally, in an embodiment of the present application, the first cavity 1011 can be used to accommodate a fluid for adjusting the temperature of the battery cell 20.

[0091] The fluid can be a liquid or a gas. Adjusting the temperature means heating or cooling the plurality of battery cells 20. In the case of cooling the battery cell 20, the first cavity 1011 can accommodate a cooling medium to adjust the temperature of the plurality of battery cells 20. At this time, the fluid can also be referred to as a cooling medium or a cooling fluid, and more specifically, it can be referred to as a coolant or a cooling gas. Additionally, the fluid can also be used for heating, and the embodiments of the present application do not limit this. Optionally, the fluid can flow cyclically to achieve a better temperature adjustment effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, a refrigerant, or air, etc.

[0092] Optionally, in an embodiment of the present application, the dimension T1 of the partition 101 in the third direction y is 0.1 - 100 mm.

[0093] When the dimension T1 of the partition 101 in the third direction y is too small, the stiffness of the partition 101 is poor and it cannot effectively improve the structural strength of the battery 10. When the dimension T1 of the partition 101 in the third direction y is too large, it will occupy too much space inside the battery 10, which is not conducive to improving the energy density of the battery 10. Therefore, the dimension T1 of the partition 101 in the third direction y is set to 0.1 - 100 mm, which can not only ensure the energy density of the battery 10 but also improve the structural strength of the battery 10.

[0094] Optionally, in an embodiment of the present application, the dimension T1 of the partition 101 in the third direction y and the dimension T2 of the battery cell 20 in the third direction y satisfy: 0 < T1 / T2 ≤ 7.

[0095] When T1 / T2 is too large, the partition 101 occupies a large space, affecting the energy density. Additionally, the partition 101 conducts heat too quickly for the battery cell 20, which may also cause safety problems. For example, when one battery cell 20 undergoes thermal runaway, it may trigger thermal runaway of other battery cells 20 connected to the same partition 101. When 0 < T1 / T2 ≤ 7, the energy density of the battery 10 can be ensured and the safety performance of the battery 10 can be guaranteed.

[0096] Optionally, in an embodiment of the present application, the dimension T1 of the partition 101 in the third direction y and the dimension T2 of the battery cell 20 in the third direction y can further satisfy 0 < T1 / T2 ≤ 1 to further improve the energy density of the battery 10 and ensure the safety performance of the battery 10.

[0097] Optionally, in an embodiment of the present application, the weight M1 of the partition 101 and the weight M2 of the battery cell 20 satisfy: 0 < M1 / M2 ≤ 20.

[0098] When M1 / M2 is too large, weight energy density will be lost. When 0 < M1 / M2 ≤ 20, the weight energy density of battery 10 can be ensured and the safety performance of battery 10 can be guaranteed.

[0099] Optionally, in an embodiment of the present application, the weight M1 of the separator 101 and the weight M2 of the battery cell 20 may further satisfy 0.1 ≤ M1 / M2 ≤ 1, so as to further improve the energy density of battery 10 and guarantee the safety performance of battery 10.

[0100] Optionally, in an embodiment of the present application, the area S1 of the surface of the separator 101 connected to the first wall 201 of the plurality of battery cells 20 and the area S2 of the first wall 201 satisfy: 0.2 ≤ S1 / S2 ≤ 30.

[0101] S1 is the total area of the surface of the separator 101 connected to the battery cell 20. When S1 / S2 is too large, the energy density is affected. When S1 / S2 is too small, the heat conduction effect is too poor to affect the safety performance. When 0.2 ≤ S1 / S2 ≤ 30, the energy density of battery 10 can be ensured and the safety performance of battery 10 can be guaranteed.

[0102] Optionally, in an embodiment of the present application, the area S1 of the surface of the separator 101 connected to the first wall 201 of the plurality of battery cells 20 and the area S2 of the first wall 201 may further satisfy 2 ≤ S1 / S2 ≤ 10, so as to further improve the energy density of battery 10 and guarantee the safety performance of battery 10.

[0103] Optionally, in an embodiment of the present application, the specific heat capacity Q of the separator 101 and the weight M1 of the separator 101 satisfy: 0.02 KJ / (kg 2 / °C) ≤ Q / M1 ≤ 100 KJ / (kg 2 / °C).

[0104] When Q / M1 < 0.02 KJ / (kg 2 / °C), the separator 101 will absorb more energy, causing the temperature of the battery cell 20 to be too low, and lithium plating may occur; when Q / M1 > 100 KJ / (kg 2 / °C), the heat conduction ability of the separator 101 is poor and it cannot take away heat in time. When 0.02 KJ / (kg 2 / °C) ≤ Q / M1 ≤ 100 KJ / (kg 2 / °C), the safety performance of battery 10 can be guaranteed.

[0105] Optionally, in an embodiment of the present application, the specific heat capacity Q of the separator 101 and the weight M1 of the separator 101 may further satisfy 0.3 KJ / (kg 2 / °C) ≤ Q / M1 ≤ 20 KJ / (kg2 / °C) to further improve the safety performance of the battery 10.

[0106] Optionally, in an embodiment of the present application, as Figure 8 shown, a second cavity 2041 may be provided inside the mounting wall 204. The second cavity 2041 can reduce the weight of the mounting wall 204 while ensuring the strength of the mounting wall 204. In addition, the second cavity 2041 can provide a large compression space for the mounting wall 204 in the second direction z, so as to provide a large expansion space for the battery cell 20.

[0107] Optionally, in an embodiment of the present application, the second cavity 2041 can be used to accommodate a fluid to adjust the temperature of the battery cell 20.

[0108] The fluid can be a liquid or a gas. Adjusting the temperature means heating or cooling the plurality of battery cells 20. In the case of cooling the battery cell 20, the second cavity 2041 can accommodate a cooling medium to adjust the temperature of the plurality of battery cells 20. At this time, the fluid can also be referred to as a cooling medium or a cooling fluid, and more specifically, it can be referred to as a coolant or a cooling gas. In addition, the fluid can also be used for heating, and the embodiments of the present application do not limit this. Optionally, the fluid can be circulated to achieve a better temperature adjustment effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, a refrigerant, or air, etc.

[0109] Optionally, in an embodiment of the present application, a strengthening member 2042 may also be provided in the second cavity 2041, so as to improve the strength of the mounting wall 204.

[0110] Optionally, in an embodiment of the present application, as Figure 9 shown, the battery 10 further includes a reinforcing rib 205, and the reinforcing rib 205 is disposed on the surface of the mounting wall 204 away from the battery cell 20 along the second direction z.

[0111] Optionally, in an embodiment of the present application, the reinforcing rib 205 and the mounting wall 204 are an integrally formed structure. This integrally formed structure is easy to process and assemble, and this structure can also be formed by means of splicing, welding, bonding, machining, stamping, etc., and the present application does not limit this.

[0112] Optionally, in an embodiment of the present application, the battery 10 includes multiple battery cells 20 arranged in multiple columns along the first direction x and multiple separators 101, where the multiple columns of battery cells 20 and the multiple separators 101 are alternately arranged in the third direction y, and the third direction y is perpendicular to the first wall 201. That is to say, the multiple columns of battery cells 20 and the multiple separators 101 can be arranged as separator 101, a column of battery cells 20, separator 101..., or a column of battery cells 20, separator 101, a column of battery cells 20... In this way, the multiple columns of battery cells 20 and the multiple separators 101 are connected to form a whole and are accommodated in the box body 11, which can not only effectively conduct heat for each column of battery cells 20, but also ensure the structural strength of the whole battery 10, thereby improving the performance of the battery 10.

[0113] Figure 10 FIG. 4 shows a schematic structural diagram of the battery 10 according to another embodiment of the present application. As Figure 10 shown, the battery 10 may include multiple battery modules 100. The battery module 100 includes at least one column of multiple battery cells 20 arranged along the first direction x and at least one separator 101, and at least one column of battery cells 20 and at least one separator 101 are alternately arranged in the third direction y. That is to say, for each battery module 100, the columns of battery cells 20 and the separator 101 therein are alternately arranged in the third direction y, and the multiple battery modules 100 are accommodated in the box body 11 to form the battery 10.

[0114] Optionally, the battery module 100 may include N columns of battery cells 20 and N - 1 separators 101, and the separators 101 are arranged between two adjacent columns of battery cells 20, where N is an integer greater than 1. That is to say, the separators 101 are arranged inside the battery module 100, and no separator 101 is arranged outside the battery module 100. For example, one separator 101 is arranged between two columns of battery cells 20, and two separators 101 are arranged between three columns of battery cells 20, and so on.

[0115] Optionally, in an embodiment of the present application, as Figure 10 shown, the battery module 100 includes two columns of battery cells 20, that is, N is 2. Correspondingly, one separator 101 is arranged between the two columns of battery cells 20. No separator 101 is arranged between adjacent battery modules 100. In this way, fewer separators 101 can be arranged in the battery 10 in this embodiment, but at the same time, it can be ensured that each battery cell 20 can be connected to the separator 101.

[0116] Optionally, in an embodiment of the present application, a plurality of battery modules 100 are arranged along the third direction y, and there is a gap between adjacent battery modules 100. There is no partition 101 between adjacent battery modules 100, and there is a certain gap. The gap between adjacent battery modules 100 can provide expansion space for the battery cells 20.

[0117] Optionally, a fixing structure 103 is provided at the end of the partition 101 in the first direction x, and the partition 101 is fixed to the mounting wall 204 through the fixing structure 103. The fixing structure 103 can be directly connected to the mounting wall 204, or can be connected to the side wall of the box body 11 and then connected to the mounting wall 204. In this way, each battery cell 20 is fixed to the mounting wall 204 by the partition 101 and the fixing structure 103. In this way, the fixed connection between the battery cell 20 and the mounting wall 204 is enhanced, and the entire battery 10 is connected as a whole, improving the structural strength of the battery 10.

[0118] Optionally, the fixing structure 103 may include a fixing plate 104. The fixing plate 104 is fixedly connected to the end of the partition 101 and is fixedly connected to the battery cell 20 located at the end of the partition 101. For example, for a cuboid battery cell 20, the fixing plate 104 can be vertically connected to the partition 101 and is respectively connected to two adjacent side walls of the cuboid battery cell 20 by the partition 101, thereby further strengthening the fixing effect on the battery cell 20.

[0119] Optionally, the fixing plate 104 can be made of the same material as the partition 101, for example, metal, plastic or composite material. The thickness of the fixing plate 104 can also be the same as that of the partition 101. The material or thickness of the fixing plate 104 can also be different from that of the partition 101. For example, the fixing plate 104 can be set with higher strength or thickness, but the embodiments of the present application are not limited thereto.

[0120] Optionally, the connection method between the partition 101 and the fixing plate 104 can be connection methods such as resistance welding, resistance riveting, SPR riveting, locking bolts or snap connection; the fixing plate 104 can also be fixed to the mounting wall 204 by connection methods such as resistance welding, resistance riveting, SPR riveting, locking bolts or snap connection, but the embodiments of the present application are not limited thereto.

[0121] Optionally, the fixing plate 104 and the battery cell 20 can be fixedly connected by an adhesive method, for example, by bonding with a structural adhesive, but the embodiments of the present application are not limited thereto.

[0122] Optionally, the fixing plate 104 includes a first connecting portion 105 extending in a direction away from the battery cell 20 along the first direction, and the first connecting portion 105 is used to connect the mounting wall 204.

[0123] The first connecting portion 105 can be parallel to the mounting wall 204, and the area of the first connecting portion 105 can be set according to the fixing manner with the side wall of the connected box body 11 to meet the required fixing effect.

[0124] Optionally, the first connecting portion 105 can be formed by bending the fixing plate 104. For example, the first connecting portion 105 can be formed by bending the edge of the fixing plate 104 close to the mounting wall 204 away from the battery cell 20. For example, the upper edge of the fixing plate 104 can be bent outward to form the first connecting portion 105. In this way, the first connecting portion 105 and the main body of the fixing plate 104 are of an integral structure, thereby enhancing the connection performance.

[0125] Optionally, in an embodiment of the present application, the fixing plate 104 further includes a second connecting portion 106 extending in a first direction away from the battery cell 20, and the second connecting portion 106 is used to connect the fixing plate 104 and the partition 101. For example, at the position where the fixing plate 104 is connected to the partition 101, it can extend away from the battery cell 20, that is, extend outward to form the second connecting portion 106, and the fixing plate 104 is fixedly connected to the partition 101 through the second connecting portion 106.

[0126] Optionally, in addition to connecting the partition 101, the second connecting portion 106 can also simultaneously realize the connection between the fixing plates 104. For example, one fixing plate 104 is provided for each column of battery cells 20, and the partition 101 and the two fixing plates 104 corresponding to the two columns of battery cells 20 are fixed together through the second connecting portion 106.

[0127] The second connecting portion 106 can be parallel to the partition 101. The area of the second connecting portion 106 can be set according to the fixing manner to meet the required fixing effect.

[0128] Optionally, in an embodiment of the present application, the partition 101 is bonded to the first wall 201. That is to say, the partition 101 and the battery cell 20 can be fixedly connected by bonding, for example, by structural adhesive, but the embodiments of the present application are not limited thereto.

[0129] Optionally, in an embodiment of the present application, the mounting wall 204 is bonded to the second wall 202. That is to say, the mounting wall 204 and the battery cell 20 can be fixedly connected by bonding, for example, by structural adhesive, but the embodiments of the present application are not limited thereto.

[0130] It should be understood that the relevant parts in the embodiments of the present application can be referred to each other, and for the sake of brevity, they will not be described again.

[0131] An embodiment of the present application further provides an electrical device, which may include the battery 10 in the foregoing embodiment. Optionally, the electrical device may be a vehicle 1, a ship, a spacecraft, etc., but the embodiments of the present application are not limited thereto.

[0132] The battery 10 and the electrical device of the embodiments of the present application are described above. Next, the method and device for manufacturing the battery 10 of the embodiments of the present application will be described. For parts not described in detail, reference may be made to the foregoing embodiments.

[0133] Figure 11 A schematic flowchart of a method 300 for manufacturing a battery 10 according to an embodiment of the present application is shown. As Figure 11 shown, the method 300 may include:

[0134] 310. Provide a plurality of battery cells 20 arranged along a first direction x. The battery cell 20 includes a first wall 201 and a second wall 202. The first wall 201 is the wall with the largest surface area in the battery cell 20, and the second wall 202 is connected to the first wall 201;

[0135] 320. Provide a separator 101. The separator 101 extends along the first direction x and is connected to the first wall 201 of each battery cell 20 among the plurality of battery cells 20;

[0136] 330. Provide a mounting wall 204. The mounting wall 204 is connected to the second wall 202 of each battery cell 20 among the plurality of battery cells 20. When the battery cell 20 is disposed in the electrical device, the battery cell 20 is located below the mounting wall 204, and the mounting wall 204 is used to mount the battery cell 20.

[0137] Figure 12 A schematic block diagram of a device 400 for manufacturing a battery 10 according to an embodiment of the present application is shown. As Figure 12 shown, the device 400 for manufacturing a battery 10 may include:

[0138] A first providing module 410 for providing a plurality of battery cells 20 arranged along a first direction x. The battery cell 20 includes a first wall 201 and a second wall 202. The first wall 201 is the wall with the largest surface area in the battery cell 20, and the second wall 202 is connected to the first wall 201;

[0139] A second providing module 420 for providing a separator 101. The separator 101 extends along the first direction x and is connected to the first wall 201 of each battery cell 20 among the plurality of battery cells 20;

[0140] A third providing module 430 is configured to provide a mounting wall 204, and the mounting wall 204 is connected to a second wall 202 of each battery cell 20 among a plurality of battery cells 20. When the battery cell 20 is disposed in an electrical device, the battery cell 20 is located below the mounting wall 204, and the mounting wall 204 is configured to mount the battery cell 20.

[0141] Hereinafter, embodiments of the present application will be described. The following described embodiments are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. For technologies or conditions not specified in the embodiments, they shall be carried out according to the technologies or conditions described in the literature in the art or according to the product specifications.

[0142] Using the battery cell 20 and the separator 101 shown in the drawings, the battery 10 is subjected to a safety test according to GB38031-2020, and the test results are shown in Tables 1-4.

[0143] Table 1

[0144]

[0145]

[0146] Table 2

[0147] Number M1 / Kg M2 / Kg M1 / M2 Test result 1 0.2 3 0.068 No fire, no explosion 2 0.4 2.5 0.16 No fire, no explosion 3 0.7 1.5 0.467 No fire, no explosion 4 10 1.5 6.7 No fire, no explosion 5 15 1 15 No fire, no explosion

[0148] Table 3

[0149] Number <![CDATA[S1 / mm 2 > <![CDATA[S2 / mm 2 > S1 / S2 Test result 1 3120 21728 0.14 Fire, explosion 2 19500 38800 0.5 No fire, no explosion 3 65000 16800 3.87 No fire, no explosion 4 130000 16576 7.84 No fire, no explosion 5 216000 9600 22.5 No fire, no explosion 6 250000 7200 34.72 Fire, explosion

[0150] Table 4

[0151] Number <![CDATA[Q / KJ / (kg 2 / ℃)]]> M1 / kg <![CDATA[Q / M1(KJ / (kg 2 / ℃))]]> Test result 1 0.39 25 0.016 Fire, explosion 2 0.46 5 0.092 No fire, no explosion 3 0.88 0.5 1.76 No fire, no explosion 4 4 0.4 10 No fire, no explosion 5 4 0.1 40 No fire, no explosion 6 4 0.025 160 Fire, explosion

[0152] It can be seen from the above test results that the battery 10 provided by the present application can meet the safety performance requirements.

[0153] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, Comprising: A plurality of battery cells (20) arranged in a first direction, the battery cells (20) including a first wall (201) and a second wall (202), the first wall (201) being the wall with the largest surface area in the battery cell (20), and the second wall (202) being connected to the first wall (201); A box body (11), the plurality of battery cells (20) being accommodated in the box body; A partition (101), the partition (101) extending in the first direction and being connected to the first wall (201) of each battery cell (20) among the plurality of battery cells (20); A mounting wall (204), the mounting wall (204) being connected to the second wall (202) of each battery cell (20) among the plurality of battery cells (20), wherein when the battery cell (20) is disposed on an electrical device, the battery cell (20) is located below the mounting wall (204), and the mounting wall (204) is used for mounting the battery cell (20).

2. The battery according to claim 1, wherein An electrode terminal (214) is provided on a third wall (203) of the battery cell (20), the third wall (203) being separated from and opposite to the second wall (202) in a second direction, the second direction being perpendicular to the second wall (202); or The third wall (203) is connected to the second wall (202), and the first direction is perpendicular to the third wall (203).

3. The battery according to claim 1, characterized in that, The partition (101) is a metal material plate.

4. The battery according to claim 3, characterized in that, An insulating layer (102) is provided on the surface of the partition (101).

5. The battery according to claim 1, wherein The partition (101) is a non-metal material plate.

6. The battery according to claim 1, characterized in that, A first cavity (1011) is provided inside the partition (101).

7. The battery according to claim 6, characterized in that, The first cavity (1011) is used for accommodating a fluid to regulate the temperature of the battery cell (20).

8. The battery according to any one of claims 1 to 7, characterized in that, The size T1 of the partition (101) in a third direction is 0.1 to 100 mm, the third direction being perpendicular to the first wall (201).

9. The battery according to claim 8, characterized in that, The size T1 of the partition (101) in the third direction and the size T2 of the battery cell (20) in the third direction satisfy: 0 < T1 / T2 ≤ 7.

10. The battery according to claim 9, characterized in that, 0 < T1 / T2 ≤ 1.

11. The battery according to any one of claims 1 to 7, characterized in that The weight M1 of the partition (101) and the weight M2 of the battery cell (20) satisfy: 0 < M1 / M2 ≤ 20.

12. The battery according to claim 11, wherein, 0.1 ≤ M1 / M2 ≤ 1.

13. The battery according to any one of claims 1 to 7, characterized in that The area S1 of the surface of the partition (101) connected to the first wall (201) of the plurality of battery cells (20) and the area S2 of the first wall (201) satisfy: 0.2 ≤ S1 / S2 ≤ 30.

14. The battery according to claim 13, characterized in that, 2 ≤ S1 / S2 ≤ 10.

15. The battery according to any one of claims 1 to 7, characterized in that, The specific heat capacity Q of the partition (101) and the weight M1 of the partition (101) satisfy: 0.02 KJ / (kg 2 / °C) ≤ Q / M1 ≤ 100 KJ / (kg 2 / °C).

16. The battery according to claim 15, characterized in that, 0.3 KJ / (kg 2 / °C) ≤ Q / M1 ≤ 20 KJ / (kg 2 / °C).

17. The battery according to any one of claims 1 to 7, characterized in that, A second cavity (2041) is provided inside the mounting wall (204).

18. The battery according to claim 17, wherein, The second cavity (2041) is used for accommodating a fluid to regulate the temperature of the battery cell (20).

19. The battery according to any one of claims 1 to 7, characterized in that, The battery further includes a reinforcing rib (205), the reinforcing rib (205) being provided on the surface of the mounting wall (204) away from the battery cell (20) in a second direction, the second direction being perpendicular to the second wall (202).

20. The battery according to claim 19, wherein, The reinforcing rib (205) and the mounting wall (204) are of an integrally formed structure.

21. The battery according to any one of claims 1 to 7, characterized in that, The battery includes a plurality of battery cells (20) arranged in multiple columns along the first direction and a plurality of separators (101), wherein the multiple columns of battery cells (20) and the plurality of separators (101) are alternately arranged in the third direction, and the third direction is perpendicular to the first wall (201).

22. The battery according to any one of claims 1 to 7, characterized in that, The battery includes a plurality of battery modules (100), each battery module (100) includes at least one column of a plurality of battery cells (20) arranged along the first direction and at least one separator (101), and at least one column of battery cells (20) and at least one separator (101) are alternately arranged in the third direction, and the third direction is perpendicular to the first wall (201).

23. The battery according to claim 22, characterized in that, The battery module (100) includes N columns of battery cells (20) and N - 1 separators (101), the separators (101) are arranged between two adjacent columns of battery cells (20), and N is an integer greater than 1.

24. The battery according to claim 22, wherein A plurality of battery modules (100) are arranged along the third direction, and there is a gap between adjacent battery modules.

25. The battery according to any one of claims 1 to 7, characterized in that, The separator (101) is provided with a fixing structure (103) at an end in the first direction, and the separator (101) is fixed to the mounting wall (204) through the fixing structure (103).

26. The battery according to any one of claims 1 to 7, characterized in that, The separator (101) is bonded to the first wall (201).

27. The battery according to any one of claims 1 to 7, characterized in that, The mounting wall (204) is bonded to the second wall (202).

28. An electrical device, characterized in that, Comprising: The battery according to any one of claims 1 to 27, the battery is used to provide electrical energy.

29. A method for preparing a battery, characterized in that, Comprising: Providing a plurality of battery cells (20) arranged along the first direction, the battery cell (20) includes a first wall (201) and a second wall (202), the first wall (201) is the wall with the largest surface area in the battery cell (20), and the second wall (202) is connected to the first wall (201); Providing a separator (101), the separator (101) extends along the first direction and is connected to the first wall (201) of each battery cell (20) among the plurality of battery cells (20); Providing a mounting wall (204), the mounting wall (204) is connected to the second wall (202) of each battery cell (20) among the plurality of battery cells (20), wherein when the battery cell (20) is arranged in an electrical device, the battery cell (20) is located below the mounting wall (204), and the mounting wall (204) is used to mount the battery cell (20).

30. An apparatus for preparing a battery, characterized in that, Comprising: A first providing module for providing a plurality of battery cells (20) arranged along the first direction, the battery cell (20) includes a first wall (201) and a second wall (202), the first wall (201) is the wall with the largest surface area in the battery cell (20), and the second wall (202) is connected to the first wall (201); A second providing module, configured to provide a partition plate (101) that extends along the first direction and is connected to the first wall (201) of each of the plurality of battery cells (20); A third providing module, configured to provide a mounting wall (204) that is connected to the second wall (202) of each of the plurality of battery cells (20), wherein when the battery cells (20) are disposed in an electrical device, the battery cells (20) are located below the mounting wall (204), and the mounting wall (204) is used for mounting the battery cells (20).

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