CN216872137U - Batteries and Electrical Equipment - Google Patents

Abstract

Embodiments of the present application provide a battery and an electrical device, the battery includes a plurality of battery cells arranged along a first direction, the battery cell includes a first wall and a second wall, and the first wall is the middle surface area of the battery cell the largest wall, the second wall is connected with the first wall; the separator, the separator extends along the first direction and is connected with the first wall of each battery cell in the plurality of battery cells; the hanging wall, the hanging wall is connected to the second wall of each battery cell in the plurality of battery cells, wherein, when the battery cell is arranged in the electrical equipment, the battery cell is located under the mounting wall, and the mounting wall is used for mounting the battery cell . The technical solutions of the embodiments of the present application can improve the performance of the battery.

Description

Batteries and Electrical Equipment

technical field

The present application relates to the field of battery technology, and in particular, to a battery and electrical equipment.

Background technique

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 in its development.

The space utilization inside the battery affects the structural strength and energy density of the battery, which in turn affects the performance of the battery. How to improve the performance of the battery is an urgent technical problem to be solved in the battery technology.

Utility model content

The embodiments of the present application provide a battery and an electrical device, which can improve the structural strength and energy density of the battery, thereby improving the performance of the battery.

In a first aspect, a battery is provided, comprising: a plurality of battery cells arranged in a first direction, the battery cells including a first wall and a second wall, the first wall being one of the battery cells The wall with the largest surface area, the second wall is connected with the first wall; the separator, the separator extends along the first direction and is connected with all the battery cells of the plurality of battery cells. the first wall is connected; the mounting wall is connected with the second wall of each battery cell in the plurality of battery cells, wherein the battery cell is provided for the electrical equipment When the battery cell is located below the mounting wall, the mounting wall is used for mounting the battery cell.

In the embodiment of the present application, a separator is arranged in the battery to be connected to the first wall with the largest surface area of each battery cell in a row of a plurality of battery cells arranged along the first direction, and the plurality of battery cells are connected by the separator. The battery is connected as a whole. In this case, there is no need to set side plates in the battery, or it is not necessary to set up structures such as beams, which can maximize the space utilization rate inside the battery and improve the structural strength and energy density of the battery. A mounting wall is also arranged in the battery to be connected to the second wall of each battery cell in the plurality of battery cells arranged along the first direction, the second wall is connected to the first wall, and the battery cells are arranged to use electricity When the device is installed, the battery cell is located under 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 is required between the mounting wall and the battery cell, which further improves the space utilization rate inside the battery and improves the energy density of the battery. Mounting on the mounting wall can improve the structural strength of the battery. Therefore, the technical solutions of the embodiments of the present application can improve the performance of the battery.

In a possible implementation manner, electrode terminals are provided on the third walls of the battery cells, and the third walls and the second walls are spaced apart and opposite to each other along a second direction, and the second direction is perpendicular to the second wall; or, the third wall is connected to the second wall, and the first direction is perpendicular to the third wall.

The electrode terminal is arranged on the third wall, the third wall and the second wall are arranged opposite to each other along the second direction, the second direction is perpendicular to the second wall, or the third wall is connected with the second wall, and the first direction perpendicular to the third wall. That is, the electrode terminals are arranged on the wall of the non-mounting wall, so that there is no need to reserve space for the electrode terminals between the battery cell and the mounting wall, so that the space utilization rate inside the battery can be maximized and the energy of the battery can be improved. density.

In a possible implementation manner, the separator is a metal material plate. This ensures the strength of the separator.

In a possible implementation manner, an insulating layer is provided on the surface of the separator. By arranging an insulating layer on the surface of the separator, the surface of the separator connected to the first wall can be an insulating surface.

In a possible implementation manner, the separator is a non-metallic material plate.

In a possible implementation manner, a first cavity is provided in 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 make the separator have a larger compression space in the direction perpendicular to the first wall, so that the battery cells can be compressed. The body provides a large expansion space.

In a possible implementation manner, the first cavity is used for containing fluid to adjust the temperature of the battery cells, so that the temperature of the battery cells can be effectively managed.

In a possible implementation manner, a dimension T1 of the partition plate in a third direction is 0.1-100 mm, and the third direction is perpendicular to the first wall. When the dimension T1 of the separator in the third direction is too small, the rigidity of the separator is poor, and the structural strength of the battery cannot be effectively improved. When the dimension T1 of the separator in the third direction is too large, it will occupy too much space inside the battery. It is not conducive to improving the energy density of the battery, so the size T1 of the separator in the third direction is set to be 0.1-100 mm, which can not only ensure the energy density of the battery, but also improve the structural strength of the battery.

In a possible implementation manner, 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. In this way, the energy density of the battery can be guaranteed and the safety performance of the battery can be guaranteed.

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

In a possible implementation manner, the weight M1 of the separator and the weight M2 of the battery cell satisfy: 0<M1/M2≤20. In this way, the weight energy density of the battery can be guaranteed and the safety performance of the battery can be guaranteed.

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

In a possible implementation manner, the area S1 of the surface of the separator connected to the first walls of the plurality of battery cells and the area S2 of the first walls satisfy: 0.2≤S1/S2 ≤30. In this way, the energy density of the battery can be guaranteed and the safety performance of the battery can be guaranteed.

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

In a possible implementation manner, the specific heat capacity Q of the separator and the weight M1 of the separator satisfy: 0.02KJ/(kg ² /°C)≤Q/M1≤100KJ/(kg ² /°C). When Q/M1＜0.02KJ/(kg ² /℃), the separator will absorb more energy, resulting in low temperature of battery cells, which may cause lithium precipitation; when Q/M1＞100KJ/(kg ² /℃) , The separator has poor thermal conductivity and cannot take away heat in time. When 0.02KJ/(kg ² /℃)≤Q/M1≤100KJ/(kg ² /℃), the safety performance of the battery can be guaranteed.

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

In a possible implementation manner, a second cavity is provided inside the mounting wall. The second cavity can reduce the weight of the hanging wall while ensuring the strength of the hanging wall. In addition, the second cavity can make the hanging wall have a larger compression space in the direction perpendicular to the second wall, so that it can be Provide larger expansion space for battery cells.

In a possible implementation manner, the second cavity is used for containing fluid to adjust the temperature of the battery cells, so that the temperature of the battery cells can be effectively managed.

In a possible implementation manner, the battery further includes a reinforcing rib, and the reinforcing rib is disposed on a surface of the mounting wall that is away from the battery cell along a second direction, and the second direction is perpendicular to the the second wall. The reinforcing rib can increase the strength of the mounting wall.

In a possible implementation manner, the reinforcing rib and the hanging wall are formed into an integral structure, and the structure is easy to process and assemble.

In a possible implementation manner, the battery includes a plurality of rows of the plurality of battery cells and a plurality of the separators arranged along the first direction, wherein the plurality of rows of the battery cells and the plurality of separators The baffles are alternately arranged in a third direction, the third direction being perpendicular to the first wall. In this way, the plurality of rows of battery cells and the plurality of separators are connected to each other to form a whole, and are accommodated in the box, which can ensure the overall structural strength of the battery, thereby improving the performance of the battery.

In a possible implementation manner, the battery includes a plurality of battery modules, and the battery module includes at least one column of a plurality of the battery cells and at least one of the separators arranged along the first direction, and at least A row of the battery cells and at least one of the separators are alternately arranged in a third direction, the third direction being perpendicular to the first wall.

In a possible implementation manner, the battery module includes N rows of the battery cells and N−1 separators, and the separators are arranged between two adjacent rows of the battery cells, N is an integer greater than 1. In this way, fewer separators can be arranged in the battery, but at the same time, it can be ensured that each battery cell can be connected to the separator.

In a possible implementation manner, a plurality of the battery modules are arranged along the third direction, and there is a gap between the adjacent battery modules. The gap may provide room for expansion of the battery cells.

In a possible implementation manner, the end of the separator in the first direction is provided with a fixing structure, and the separator is fixed to the mounting wall through the fixing structure, so that the battery life can be improved. Structural strength.

In a possible implementation manner, the partition plate is bonded to the first wall.

In a possible implementation manner, the mounting wall is bonded to the second wall.

In a second aspect, an electrical device is provided, comprising: a battery according to the first aspect or any possible implementation manner of the first aspect, the battery is used to provide electrical energy.

In a third aspect, a method for preparing a battery is provided, comprising: providing a plurality of battery cells arranged in a first direction, the battery cells including a first wall and a second wall, the first wall being the a wall with the largest surface area in a battery cell, the second wall is connected to the first wall; a separator is provided, the separator extending along the first direction and connected to each of the plurality of battery cells the first wall of a battery cell is connected; a mounting wall is provided, the mounting wall is connected with the second wall of each battery cell of the plurality of battery cells, wherein the battery cell When the body is arranged on the electrical equipment, the battery cells are located under the mounting wall, and the mounting wall is used for mounting the battery cells.

In a fourth aspect, an apparatus for preparing a battery is provided, including a module for performing the method of the third aspect above.

In the embodiment of the present application, a separator is arranged in the battery to be connected to the first wall with the largest surface area of each battery cell in a row of a plurality of battery cells arranged along the first direction, and the plurality of battery cells are connected by the separator. The battery is connected as a whole. In this case, there is no need to set side plates in the battery, or it is not necessary to set up structures such as beams, which can maximize the space utilization rate inside the battery and improve the structural strength and energy density of the battery. A mounting wall is also arranged in the battery to be connected to the second wall of each battery cell in the plurality of battery cells arranged along the first direction, the second wall is connected to the first wall, and the battery cells are arranged to use electricity When the device is installed, the battery cell is located under 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 is required between the mounting wall and the battery cell, which further improves the space utilization rate inside the battery and improves the energy density of the battery. Mounting on the mounting wall can improve the structural strength of the battery. Therefore, the technical solutions of the embodiments of the present application can improve the performance of the battery.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the drawings required in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to the drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a vehicle disclosed in an embodiment of the present application;

2 is a schematic diagram of an exploded structure of a battery disclosed in an embodiment of the present application;

3 is a schematic structural diagram of a battery cell disclosed in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a battery disclosed in an embodiment of the present application;

5 is a partial schematic diagram of a battery disclosed in an embodiment of the present application;

6 is a schematic diagram of a separator and an insulating layer disclosed in an embodiment of the present application;

7 is a schematic diagram of a separator with a cavity disclosed in an embodiment of the present application;

8 is a schematic diagram of a mounting wall disclosed in an embodiment of the present application;

9 is a schematic diagram of a reinforcing rib disclosed in an embodiment of the present application;

10 is a schematic structural diagram of a battery disclosed in an embodiment of the present application;

11 is a schematic diagram of a method for preparing a battery according to an embodiment of the present application;

FIG. 12 is a schematic diagram of an apparatus for preparing a battery according to an embodiment of the present application.

In the drawings, the figures are not drawn to actual scale.

Detailed ways

The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application by way of example, but should not be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

In the description of this 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 of this application; the terms used are only for describing specific The purpose of the embodiment of the present invention is not intended to limit the application; the terms "comprising" and "having" in the description and claims of the present application and the above description of the drawings, as well as any modifications thereof, are intended to cover non-exclusive inclusion; "Plural" means more than two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance. "Vertical" is not strictly vertical, but within the allowable range of errors. "Parallel" is not strictly parallel, but within the allowable range of errors.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

Orientation words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

The term "and/or" in this application is only an association relationship to describe associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, independently There are three cases of B. In addition, the character "/" in this application generally indicates that the related objects are an "or" relationship.

In the present application, the 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., which are not limited in the embodiments of the present application. The battery cell may be in the form of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in the embodiments of the present application. The battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square-shaped battery cells, and soft-pack battery cells, which are not limited in the embodiments of the present application.

The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the batteries mentioned in this application may include battery packs and the like. Batteries typically include a case for enclosing one or more battery cells. The box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive and negative plates to work. 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 positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer, and the positive electrode active material layer is not coated. The current collector coated with the 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 cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate. The negative electrode sheet comprises 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 negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer, The current collector coated with the negative electrode active material layer was used 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. In order to ensure that a large current is passed without fusing, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. The material of the separator can be polypropylene (PP) or polyethylene (PE). In addition, the electrode assembly may be a wound structure or a laminated structure, and the embodiment of the present application is not limited thereto.

In order to meet different power demands, a battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series or in parallel or in a mixed connection, and a mixed connection refers to a mixture of series and parallel connections. Optionally, a plurality of battery cells can be connected in series or in parallel or mixed to form a battery module, and then a plurality of battery modules can be connected in series or in parallel or mixed to form a battery. That is to say, a plurality of battery cells can directly form a battery, or a battery module can be formed first, and then the battery module can be formed into a battery. The battery is further disposed in the electrical equipment to provide electrical energy for the electrical equipment.

The development of battery technology needs to consider many design factors at the same time, such as energy density, cycle life, discharge capacity, charge-discharge rate, safety, etc. Among them, in the case of a certain internal space of the battery, improving the utilization rate of the internal space of the battery is an effective means to improve the energy density of the battery. However, while improving the utilization rate of the internal space of the battery, the structural strength of the battery may be reduced. For example, beams for mounting battery modules are usually arranged inside the battery box, and side plates and end plates are also arranged for the battery modules in the battery. The above-mentioned beams, side plates and end plates also occupy the internal space of the battery while realizing the fixing of the battery. However, if the beams, side plates and end plates are not provided, the structural strength of the battery will be insufficient and the performance of the battery will be affected.

In view of this, the embodiments of the present application provide a technical solution. In the embodiments of the present application, the surface area of each battery cell in a battery cell arranged with a separator and a row of a plurality of battery cells arranged along the first direction is the largest The first wall of the battery is connected, and the plurality of battery cells are connected as a whole through the separator. In this case, the battery can no longer be provided with side plates, or there is no need to install beams and other structures, and the battery can be improved to the greatest extent. The internal space utilization rate improves the structural strength and energy density of the battery; a mounting wall is also arranged in the battery to be connected to the second wall of each battery cell in the plurality of battery cells arranged along the first direction, and the second wall is arranged in the first direction. The wall is connected with the first wall, and when the battery cell is arranged on the electrical equipment, the battery cell is located under 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 is required between the mounting wall and the battery cell, which further improves the space utilization rate inside the battery and improves the energy density of the battery. Mounting on the mounting wall can improve the structural strength of the battery. Therefore, the technical solutions of the embodiments of the present application can improve the performance of the battery.

The technical solutions described in the embodiments of this application are applicable to various devices using batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, and spacecraft. For example, the spacecraft includes Planes, rockets, space shuttles and spaceships, etc.

It should be understood that the technical solutions described in the embodiments of the present application are not only applicable to the above-described devices, but also applicable to all devices using batteries. However, for the sake of brevity, the following embodiments are described by taking electric vehicles as an example.

For example, as shown in FIG. 1 , which is a schematic structural diagram of a vehicle 1 according to an embodiment of the application, the vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or Extended range cars, etc. The interior of the vehicle 1 may be provided with a motor 40 , a controller 30 and a battery 10 , and the controller 30 is used to control the battery 10 to supply power to the motor 40 . For example, the battery 10 may be provided at the bottom of the vehicle 1 or at the front or rear of the vehicle. The battery 10 can be used for power supply of the vehicle 1 , for example, the battery 10 can be used as the operating power source of the vehicle 1 , for the circuit system of the vehicle 1 , for example, for the starting, navigation and operation power requirements of the vehicle 1 . In another embodiment of the present application, the battery 10 can not only be used as the operating power source of the vehicle 1 , but also can be used as the driving power source of the vehicle 1 to provide driving power for the vehicle 1 in place of or partially in place of fuel or natural gas.

In order to meet different power usage requirements, the battery 10 may include a plurality of battery cells. For example, as shown in FIG. 2 , which is a schematic structural diagram of a battery 10 according to an embodiment of the present application, the battery 10 may include a plurality of battery cells 20 . The battery 10 may further include a case body 11 , the interior of the case body 11 is a hollow structure, and a plurality of battery cells 20 are accommodated in the case body 11 . For example, a plurality of battery cells 20 are placed in the box 11 after being combined with each other in parallel or in series or in a mixed connection.

Optionally, the battery 10 may also include other structures, which will not be repeated here. For example, the battery 10 may further include a bussing component for realizing electrical connection between the plurality of battery cells 20, such as parallel or series or hybrid. Specifically, the bus member may realize electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20 . Further, the bus members may be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the plurality of battery cells 20 can be further drawn out through the case through the conductive mechanism. Optionally, the conducting means may also belong to the bussing member.

According to different power requirements, the number of battery cells 20 can be set to any value. A plurality of battery cells 20 can be connected in series, in parallel or in a mixed manner to achieve larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, in order to facilitate installation, the battery cells 20 may be arranged in groups, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited, and can be set according to requirements. The battery may include a plurality of battery modules, and the battery modules may be connected in series, parallel, or mixed.

As shown in FIG. 3 , which is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application, the battery cell 20 includes one or more electrode assemblies 22 , a casing 211 and a cover plate 212 . The casing 211 and the cover plate 212 form an outer casing or battery case 21 . The wall of the casing 211 and the cover plate 212 are both referred to as the wall of the battery cell 20 , wherein for the rectangular parallelepiped type battery cell 20 , the wall of the casing 211 includes a bottom wall and four side walls. The casing 211 is determined according to the combined shape of one or more electrode assemblies 22. For example, the casing 211 can be a hollow cuboid, a cube or a cylinder, and one surface of the casing 211 has an opening for one or more electrodes. Assembly 22 may be placed within housing 211 . For example, when the casing 211 is a hollow cuboid or cube, one of the planes of the casing 211 is an opening surface, that is, the plane does not have a wall so that the casing 211 communicates with the inside and the outside. When the casing 211 can be a hollow cylinder, the end face of the casing 211 is an open face, that is, the end face does not have a wall so that the casing 211 communicates with the inside and the outside. The cover plate 212 covers the opening and is connected with the case 211 to form a closed cavity in which the electrode assembly 22 is placed. The casing 211 is filled with electrolyte, such as electrolyte.

The battery cell 20 may further include two electrode terminals 214 , and the two electrode terminals 214 may be disposed on the cover plate 212 . The cover plate 212 is generally in the shape of a flat plate, and two electrode terminals 214 are fixed on the flat surface of the cover plate 212 , and the two electrode terminals 214 are a positive electrode terminal 214a and a negative electrode terminal 214b respectively. Each electrode terminal 214 is correspondingly provided with a connecting member 23 , or a current collecting member 23 , which is located between the cover plate 212 and the electrode assembly 22 for electrically connecting the electrode assembly 22 and the electrode terminal 214 .

As shown in FIG. 3, each electrode assembly 22 has a first tab 221a and a second tab 222a. The polarities of the first tab 221a and the second tab 222a are opposite. For example, when the first tab 221a is a positive tab, the second tab 222a is a negative tab. The first tabs 221a of one or more electrode assemblies 22 are connected to one electrode terminal through one 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 214 a is connected to the positive electrode tab through one connection member 23 , and the negative electrode terminal 214 b is connected to the negative electrode tab through the other connection member 23 .

In the battery cell 20 , according to actual use requirements, the electrode assembly 22 can be provided in a single or multiple electrode assemblies. As shown in FIG. 3 , four independent electrode assemblies 22 are provided in the battery cell 20 .

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

The pressure relief mechanism 213 may be various possible pressure relief structures, which are not limited in this embodiment of the present application. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism 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; and/or the pressure relief mechanism 213 may 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.

FIG. 4 shows a schematic structural diagram of a battery 10 according to an embodiment of the present application. As shown in FIG. 4 , the battery 10 includes a plurality of battery cells 20 arranged along the first direction x, a separator 101 and a mounting wall 204 .

The first direction x is the arrangement direction of a row of battery cells 20 in the battery 10 . That is, a row of battery cells 20 in the battery 10 is arranged along the x-direction.

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 separator 101 extends in the first direction x and is connected to the first wall 201 of each of the plurality of battery cells 20 .

The battery cell 20 may include a plurality of walls, and the first wall 201 with the largest surface area in the battery cell 20 is connected with the separator 101 . That is, the first walls 201 of the battery cells 20 face the separators 101 , that is, the first walls 201 of the battery cells 20 are parallel to the first direction x.

The separator 101 is connected to the wall with the largest surface area in the battery cell 20, that is, the first wall 201, so that the contact area between the separator 101 and the battery cell 20 is large, which can ensure the separation between the separator 101 and the battery cell 20. connection strength between.

The mounting wall 204 is connected to the second wall 202 of each battery cell 20 in the plurality of battery cells 20 , wherein, when the battery cell 20 is installed in the electrical equipment, the battery cell 20 is located below the mounting wall 204 , The mounting wall 204 is used to mount the battery cells 20 .

The mounting wall 204 may be the upper cover of the box of the battery 10 , or may be a part of the electrical equipment, 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 cells 20 are directly connected to the chassis surface of the vehicle, so that the upper case cover of the battery 10 is not required, the space occupied by the upper case cover of the battery 10 is saved, the space utilization rate of the battery 10 is improved, and the the energy density of the battery 10.

In the embodiment of the present application, the separator 101 is arranged in the battery 10 to be connected to the first wall 201 with the largest surface area of each battery cell 20 in a row of a plurality of battery cells 20 arranged along the first direction x, through the separator The plate 101 connects a plurality of battery cells 20 as a whole. In this case, the battery 10 can no longer be provided with side plates, and it is also not necessary to provide structures such as beams, which can maximize the space utilization inside the battery 10 The battery 10 is also provided with a mounting wall 204 to connect with the second wall 202 of each battery cell 20 of the plurality of battery cells 20 arranged along the first direction x, and improve the structural strength and energy density of the battery 10. The second wall 202 is connected to the first wall 201 . When the battery cells 20 are installed on the electrical equipment, the battery cells 20 are located below the mounting wall 204 and 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 , which further improves the space utilization rate inside the battery 10 and improves the battery 10 . energy density, and the battery cells 20 are mounted on the mounting wall 204 , which can improve the structural strength of the battery 10 . Therefore, the technical solutions of the embodiments of the present application can improve the performance of the battery 10 .

Optionally, in an embodiment of the present application, as shown in (a) of FIG. 5 , electrode terminals 214 are provided on the third walls 203 of the battery cells 20 , and the third walls 203 and the second walls 202 are arranged along the first The two directions z are separated and oppositely disposed, and the second direction z is perpendicular to the second wall 202 .

Optionally, in another embodiment of the present application, as shown in (b) of FIG. 5 , electrode terminals 214 are provided on the third walls 203 of the battery cells 20 , and the third walls 203 are connected to the second walls 202 , and the first direction x is perpendicular to the third wall 203 .

The electrode terminal 214 is arranged on the third wall 203, the third wall 203 and the second wall 202 are separated and oppositely arranged along the second direction z, the second direction z is perpendicular to the second wall 202, or the third wall 203 It is connected to the second wall 202 , and the first direction x is perpendicular to the third wall 203 . That is, the electrode terminals 214 are arranged on the wall of the non-mounting wall 204, so that there is no need to reserve space for the electrode terminals 214 between the battery cells 20 and the mounting wall 204, so that the space utilization inside the battery 10 can be maximized rate, increasing the energy density of the battery 10.

Optionally, in an embodiment of the present application, the separator 101 may be a metal material plate. That is, the entirety of the separator 101 is 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 an insulating varnish coated on the surface of the separator 101 .

As shown in FIG. 6 , an insulating layer 102 is provided on the surface of the separator 101 . With this arrangement, the partition plate 101 can be made of a metal material to ensure the strength of the partition plate 101 , and the insulating layer 102 can make the surface of the partition plate 101 connected to the first wall 201 an insulating surface.

Optionally, in an embodiment of the present application, the separator 101 may be a non-metallic material plate. That is, the entire separator 101 is made of a non-metal insulating material.

Optionally, in an embodiment of the present application, as shown in FIG. 7 , a first cavity 1011 may be provided in 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 allow the separator 101 to have a larger compression space in the third direction y, so that a larger expansion space can be provided for the battery cells 20 .

Optionally, in an embodiment of the present application, the first cavity 1011 may be used to accommodate a fluid to adjust the temperature of the battery cells 20 .

The fluid may be liquid or gas, and adjusting the temperature refers to heating or cooling the plurality of battery cells 20 . In the case of cooling the battery cells 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 It is called cooling liquid or cooling gas. In addition, the fluid may also be used for heating, which is not limited in this embodiment of the present application. Optionally, the fluid can be circulated for better temperature regulation. Optionally, the fluid may be water, a mixture of water and ethylene glycol, refrigerant or air, and the like.

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

When the dimension T1 of the separator 101 in the third direction y is too small, the stiffness of the separator 101 is poor, and the structural strength of the battery 10 cannot be effectively improved. When the dimension T1 of the separator 101 in the third direction y is too large, the Occupying too much space inside the battery 10 is not conducive to improving the energy density of the battery 10. Therefore, the dimension T1 of the separator 101 in the third direction y is set to be 0.1-100 mm, which can not only ensure the energy density of the battery 10, but also improve the The structural strength of the battery 10 .

Optionally, in an embodiment of the present application, the dimension T1 of the separator 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.

When T1/T2 is too large, the separator 101 occupies a large space, which affects the energy density. In addition, the separator 101 conducts heat to the battery cells 20 too quickly, which may also cause safety problems. For example, thermal runaway of one battery cell 20 may cause thermal runaway of other battery cells 20 connected to the same separator 101 . When 0<T1/T2≤7, the energy density of the battery 10 can be guaranteed and the safety performance of the battery 10 can be guaranteed.

Optionally, in an embodiment of the present application, the size T1 of the separator 101 in the third direction y and the size T2 of the battery cell 20 in the third direction y may further satisfy 0<T1/T2≤1, so that The energy density of the battery 10 is further improved and the safety performance of the battery 10 is guaranteed.

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

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

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 the battery 10 and ensure the safety performance.

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

S1 is the total area of one side surface of the separator 101 connected to the battery cells 20 . When S1/S2 is too large, the energy density will be affected. When S1/S2 is too small, the thermal conductivity is too poor, affecting the safety performance. When 0.2≤S1/S2≤30, the energy density of the battery 10 can be guaranteed and the safety performance of the battery 10 can be guaranteed.

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

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: 0.02KJ/(kg ² /°C)≤Q/M1≤100KJ/(kg ² /°C).

When Q/M1＜0.02KJ/(kg ² /℃), the separator 101 will absorb more energy, resulting in the temperature of the battery cell 20 being too low, which may cause lithium precipitation; Q/M1＞100KJ/(kg ² /℃) ), the thermal conductivity of the separator 101 is poor and cannot take away heat in time. When 0.02KJ/(kg ² /°C)≤Q/M1≤100KJ/(kg ² /°C), the safety performance of the battery 10 can be guaranteed.

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 0.3KJ/(kg ² /°C)≤Q/M1≤20KJ/(kg ² /°C) , so as to further improve the safety performance of the battery 10 .

Optionally, in an embodiment of the present application, as shown in FIG. 8 , 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 allow the mounting wall 204 to have a larger compression space in the second direction z, so that a larger expansion space can be provided for the battery cell 20 .

Optionally, in an embodiment of the present application, the second cavity 2041 may be used to accommodate a fluid to adjust the temperature of the battery cells 20 .

The fluid may be liquid or gas, and adjusting the temperature refers to heating or cooling the plurality of battery cells 20 . In the case of cooling the battery cells 20, the second cavity 2041 may accommodate a cooling medium to adjust the temperature of the plurality of battery cells 20. At this time, the fluid may also be referred to as a cooling medium or a cooling fluid, and more specifically, it may be It is called cooling liquid or cooling gas. In addition, the fluid may also be used for heating, which is not limited in this embodiment of the present application. Optionally, the fluid can be circulated for better temperature regulation. Optionally, the fluid may be water, a mixture of water and ethylene glycol, refrigerant or air, and the like.

Optionally, in an embodiment of the present application, a reinforcing member 2042 may also be provided in the second cavity 2041, so that the strength of the hanging wall 204 can be improved.

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

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

Optionally, in an embodiment of the present application, the battery 10 includes a plurality of columns of a plurality of battery cells 20 and a plurality of separators 101 arranged along the first direction x, wherein the plurality of columns of battery cells 20 and a plurality of separators The 101 are alternately arranged in a third direction y, which is perpendicular to the first wall 201 . That is, the plurality of rows of cells 20 and the plurality of separators 101 may be arranged in the order of separators 101 , one row of cells 20 , one row of separators 101 . . . , or, one row of cells 20 , one row of separators 101 , one row of cells 20 . …set up. In this way, the plurality of rows of battery cells 20 and the plurality of separators 101 are connected to each other to form a whole, and are accommodated in the box 11 , which can not only effectively conduct heat conduction to each row of battery cells 20 , but also ensure the overall structural strength of the battery 10 . , so that the performance of the battery 10 can be improved.

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

Optionally, the battery module 100 may include N rows of battery cells 20 and N−1 separators 101 , the separators 101 are disposed between two adjacent rows of the battery cells 20 , and N is an integer greater than 1. That is, the separator 101 is provided inside the battery module 100 , and the separator 101 is not provided outside the battery module 100 . For example, one separator 101 is arranged between two rows of battery cells 20 , two separators 101 are arranged between three rows of battery cells 20 , and so on.

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

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

Optionally, the end of the partition plate 101 in the first direction x is provided with a fixing structure 103 , and the partition plate 101 is fixed to the mounting wall 204 through the fixing structure 103 . The fixing structure 103 may be directly connected to the mounting wall 204 , or may 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 separator 101 and the fixing structure 103 , so that 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 , the structural strength of the battery 10 is improved.

Optionally, the fixing structure 103 may include a fixing plate 104 . The fixing plate 104 is fixedly connected to the end of the separator 101 , and is fixedly connected to the battery cells 20 located at the end of the separator 101 . For example, for the rectangular parallelepiped type battery cell 20, the fixing plate 104 can be vertically connected to the separator 101, and respectively connect the two adjacent side walls of the rectangular parallelepiped type battery cell 20 with the separator 101, thereby further strengthening the support for the battery cell. 20 fixed effects.

Alternatively, the fixing plate 104 may be of the same material as the spacer 101, eg, metal, plastic, or composite material. The thickness of the fixing plate 104 may be the same as that of the spacer 101 . The material or thickness of the fixing plate 104 may also be different from that of the partition plate 101 . For example, the fixing plate 104 may be set with higher strength or thickness, but this is not limited in the embodiment of the present application.

Optionally, the connection method between the partition plate 101 and the fixing plate 104 may be connection methods such as resistance welding, resistance riveting, SPR riveting, locking bolts or clamping; the fixing plate 104 may also be connected by resistance welding, resistance riveting, SPR riveting, etc. , locking bolts, or snap connections, etc., are fixed to the mounting wall 204 , but this is not limited in the embodiment of the present application.

Optionally, the fixing plate 104 and the battery cells 20 may be fixedly connected by means of bonding, for example, bonding with structural adhesive, but this is not limited in the embodiment of the present application.

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

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 method to the side wall of the connected box 11 to meet the required fixing effect.

Optionally, the first connecting portion 105 may be formed by bending the fixing plate 104 . For example, the first connecting portion 105 may be formed by bending an edge of the fixing plate 104 close to the mounting wall 204 in a direction away from the battery cell 20 . For example, the upper edge of the fixing plate 104 may 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 have an integral structure, so that the connecting performance can be enhanced.

Optionally, in an embodiment of the present application, the fixing plate 104 further includes a second connecting portion 106 extending in a direction away from the battery cells 20 along the first direction. The second connecting portion 106 is used to connect the fixing plate 104 to the battery cell 20 . Separator 101 . For example, at the position where the fixing plate 104 is connected to the separator 101 , the second connecting portion 106 can be formed in a direction away from the battery cells 20 , that is, extending outward, and the fixing plate 104 is fixedly connected to the separator 101 through the second connecting portion 106 . .

Optionally, in addition to connecting the partition plates 101 , the second connecting portion 106 can also realize the connection between the fixing plates 104 at the same time. For example, each column of battery cells 20 is provided with one fixing plate 104 , and the separator 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 .

The second connection part 106 may be parallel to the separator 101 . The area of the second connection portion 106 can be set according to the fixing method to meet the required fixing effect.

Optionally, in an embodiment of the present application, the separator 101 is bonded to the first wall 201 . That is to say, the separators 101 and the battery cells 20 may be fixedly connected by means of bonding, for example, bonding by means of structural adhesive, but this is not limited in the embodiment of the present application.

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 may be fixedly connected by means of bonding, for example, bonding with structural adhesive, but this is not limited in the embodiment of the present application.

It should be understood that the relevant parts in the embodiments of the present application may refer to each other, which will not be repeated for brevity.

An embodiment of the present application also provides an electrical device, and the electrical device may include the battery 10 in the foregoing embodiment. Optionally, the electrical device may be a vehicle 1, a ship, or a spacecraft, etc., but this is not limited in the embodiment of the present application.

The battery 10 and the electrical equipment of the embodiments of the present application are described above, and the method and device for preparing the battery 10 of the embodiments of the present application will be described below. For the parts not described in detail, reference may be made to the foregoing embodiments.

FIG. 11 shows a schematic flowchart of a method 300 for preparing the battery 10 according to an embodiment of the present application. As shown in Figure 11, the method 300 may include:

310, providing a plurality of battery cells 20 arranged along the 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 among the battery cells 20, and the second wall 202 is connected to the first wall 201;

320, providing a separator 101, the separator 101 extending along the first direction x and connected with the first wall 201 of each battery cell 20 in the plurality of battery cells 20;

330. Provide a mounting wall 204, where the mounting wall 204 is connected to the second wall 202 of each battery cell 20 in the plurality of battery cells 20, wherein, when the battery cell 20 is disposed in the electrical equipment, the battery cell 20 is located below a mounting wall 204, and the mounting wall 204 is used to mount the battery cells 20.

FIG. 12 shows a schematic block diagram of an apparatus 400 for preparing the battery 10 according to an embodiment of the present application. As shown in FIG. 12, the apparatus 400 for preparing the battery 10 may include:

The first providing module 410 is used for providing a plurality of battery cells 20 arranged along the first direction x. The battery cells 20 include a first wall 201 and a second wall 202 , and the first wall 201 has the largest surface area among the battery cells 20 . the wall, the second wall 202 is connected with the first wall 201;

a second providing module 420 for providing a separator 101, the separator 101 extending along the first direction x and connected to the first wall 201 of each battery cell 20 in the plurality of battery cells 20;

The third providing module 430 is used to provide a mounting wall 204 connected to the second wall 202 of each battery cell 20 in the plurality of battery cells 20, wherein the battery cells 20 are configured to use electricity When the device is installed, the battery cells 20 are located under the mounting wall 204 , and the mounting wall 204 is used to mount the battery cells 20 .

Hereinafter, the Example of this application is demonstrated. The embodiments described below are exemplary and are only used to explain the present application and should not be construed as a limitation on the present application. If no specific technique or condition is indicated in the examples, the technique or condition described in the literature in the field or the product specification is used.

Using the battery cells 20 and the separators 101 shown in the drawings, the battery 10 is tested for safety according to GB38031-2020, and the test results are shown in Tables 1-4.

Table 1

Numbering T1/mm T2/mm T1/T2 Test Results 1 0.2 40 0.005 No fire, no explosion 2 0.4 50 0.008 No fire, no explosion 3 0.7 45 0.016 No fire, no explosion 4 4 10 0.4 No fire, no explosion 5 4 40 0.1 No fire, no explosion 6 45 15 3 No fire, no explosion 7 150 10 15 fire, explosion

Table 2

Numbering M1/Kg M2/Kg M1/M2 Test Results 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

table 3

Numbering S1/mm² S2/mm² S1/S2 Test Results 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

Table 4

Numbering Q/KJ/(kg²/℃) M1/kg Q/M1(KJ/(kg²/℃)) Test Results 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

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

Although the application has been described with reference to the preferred embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (28)

1. A battery (10), comprising:

a plurality of battery cells (20) arranged in a first direction, wherein each battery cell (20) comprises 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 with the first wall (201);

a separator (101), the separator (101) extending in the first direction and being connected with the first wall (201) of each battery cell (20) of the plurality of battery cells (20);

mounting wall (204), mounting wall (204) with second wall (202) of every battery cell (20) in a plurality of battery cells (20) are connected, wherein, when battery cell (20) set up in consumer, battery cell (20) are located mounting wall (204) below, mounting wall (204) are used for mounting battery cell (20).

2. The battery (10) according to claim 1, wherein a third wall (203) of the battery cell (20) is provided with an electrode terminal (214), the third wall (203) being spaced apart from and disposed opposite the second wall (202) along 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 (10) of claim 1, wherein the separator (101) is a sheet of metal material.

4. The battery (10) according to claim 3, wherein the separator (101) surface is provided with an insulating layer (102).

5. The battery (10) of claim 1, wherein the separator (101) is a sheet of non-metallic material.

6. The battery (10) of claim 1, wherein the separator (101) has a first cavity (1011) disposed therein.

7. The battery (10) of claim 6, wherein the first cavity (1011) is configured to contain a fluid to regulate the temperature of the battery cell (20).

8. The battery (10) according to claim 1, wherein the separator (101) has a dimension T1 of 0.1-100 mm in a third direction perpendicular to the first wall (201).

9. The battery (10) according to claim 8, wherein a dimension T1 of the separator (101) in the third direction and a dimension T2 of the battery cell (20) in the third direction satisfy: T1/T2 is more than 0 and less than or equal to 7.

10. The battery (10) of claim 9, wherein 0 < T1/T2 ≦ 1.

11. The battery (10) according to claim 1, wherein the weight M1 of the separator (101) and the weight M2 of the battery cell (20) satisfy: M1/M2 is more than 0 and less than or equal to 20.

12. The battery (10) according to claim 11, wherein 0.1. ltoreq. M1/M2. ltoreq.1.

13. The battery (10) according to claim 1, wherein an area S1 of a surface of the separator (101) connected to the first wall (201) of the plurality of battery cells (20) and an area S2 of the first wall (201) satisfy: 0.2 is less than or equal to S1/S2 is less than or equal to 30.

14. The battery (10) according to claim 13, wherein 2. ltoreq.S 1/S2. ltoreq.10.

15. The battery (10) according to claim 1, wherein the specific heat capacity Q of the separator (101) and the weight M1 of the separator (101) satisfy: 0.02 KJ/(kg)²/℃)≤Q/M1≤100KJ/(kg²/℃)。

16. The battery (10) of claim 15, wherein 0.3 KJ/(kg)²/℃)≤Q/M1≤20KJ/(kg²/℃)。

17. The battery (10) of claim 1, wherein the mounting wall (204) has a second cavity (2041) disposed therein.

18. The battery (10) of claim 17, wherein the second cavity (2041) is configured to contain a fluid to regulate the temperature of the battery cell (20).

19. The battery (10) according to claim 1, wherein the battery (10) further comprises a reinforcing rib (205), and the reinforcing rib (205) is provided on a surface of the mounting wall (204) away from the battery cell (20) in a second direction perpendicular to the second wall (202).

20. The battery (10) of claim 19, wherein the stiffener (205) is integrally formed with the mounting wall (204).

21. The battery (10) according to claim 1, wherein the battery (10) comprises a plurality of rows of the plurality of battery cells (20) and the plurality of separators (101) arranged in the first direction, wherein the plurality of rows of the battery cells (20) and the plurality of separators (101) are alternately arranged in a third direction, the third direction being perpendicular to the first wall (201).

22. The battery (10) according to claim 1, wherein the battery (10) comprises a plurality of battery modules (100), the battery modules (100) comprise at least one column of the plurality of battery cells (20) and at least one of the separators (101) arranged in the first direction, and the at least one column of the battery cells (20) and the at least one of the separators (101) are alternately arranged in a third direction perpendicular to the first wall (201).

23. The battery (10) of claim 22, wherein the battery (10) module comprises N rows of the battery cells (20) and N-1 separators (101), the separators (101) being disposed between two adjacent rows of the battery cells (20), N being an integer greater than 1.

24. The battery (10) of claim 22, wherein a plurality of said battery (10) modules are arranged in said third direction with a gap between adjacent said battery (10) modules.

25. The battery (10) according to claim 1, wherein an end of the separator (101) in the first direction is provided with a fixing structure (103), and the separator (101) is fixed to the mounting wall (204) by the fixing structure (103).

26. The battery (10) of claim 1, wherein the separator (101) is bonded to the first wall (201).

27. The battery (10) of claim 1, wherein the mounting wall (204) is bonded to the second wall (202).

28. An electrical device, comprising: the battery (10) according to any one of claims 1 to 27, the battery (10) being for providing electrical energy.

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