CN216872133U - Battery and consumer - Google Patents

Abstract

The embodiment of the application provides a battery and electric equipment. The battery comprises a plurality of battery cells arranged along a first direction; a separator extending in a first direction and connected to a first wall of each of the plurality of battery cells, the first wall being a wall of the battery cell having a largest surface area, wherein a dimension T1 of the separator in a second direction is greater than 5mm, the second direction being perpendicular to the first wall. According to the technical scheme, the performance of the battery can be improved.

Description

A battery 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 power 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 present application provides a battery and electrical equipment, 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 along a first direction; a separator extending along the first direction and connected to each of the plurality of battery cells The first walls of the battery cells are connected, and the first wall is the wall with the largest surface area in the battery cells, wherein the dimension T1 of the separator in the second direction is greater than 5 mm, and the second direction is vertical on the first wall.

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 column of a plurality of battery cells arranged in the first direction, and the separator is perpendicular to the first wall. The dimension T1 in the second direction is greater than 5mm. A plurality of battery cells are connected into a whole through a separator. In this case, no side plates or beams and other structures are required in the battery, which can maximize the space utilization inside the battery. Improve the structural strength and energy density of the battery, thereby improving the performance of the battery.

In a possible implementation manner, a cavity is provided inside the separator.

In this way, the separator provided with the cavity structure has the ability to absorb deformation, can absorb the expansion and deformation of the battery cell, and improve the performance of the battery.

In a possible implementation, the cavity is used for containing fluid to adjust the temperature of the battery cells. In this way, the temperature of the battery cell can be conveniently adjusted to be in a suitable range at any time, and the stability and safety of the battery cell can be improved.

In a possible implementation manner, the separator further includes a pair of sub-plates disposed opposite to each other along the second direction, and the cavity is disposed between the pair of sub-plates.

In a possible implementation manner, the dimension T3 of the sub-board in the second direction is 0.1-5 mm.

When the dimension T3 of the sub-board in the second direction is too small, the cavity occupies most of the space of the partition under the condition of a certain space in the partition. In this case, the rigidity of the partition is very poor and cannot be effectively To improve the structural strength of the battery, when the dimension T3 of the daughter board in the second direction is too large, the cavity inside the separator is very small and can hold very little fluid, so the temperature of the battery cell cannot be effectively adjusted, so the setting of T3 The value is 0.1 to 5 mm.

In a possible implementation manner, the partition plate further includes a reinforcing rib, and the reinforcing rib is arranged between the pair of sub-plates. The rigidity of the partition plate can be enhanced by arranging the reinforcing ribs.

In a possible implementation manner, the dimension T1 of the separator in the second direction and the dimension T2 of the battery cell in the second direction satisfy: 0.04≤T1/T2≤2.

When T1/T2 is too small, that is, the dimension T1 of the separator in the second direction is much smaller than the dimension T2 of the battery cell in the second direction, the separator has a weak ability to absorb deformation and cannot match the expansion deformation of the battery cell , it will reduce the performance of the battery cell. When T1/T2 is too large, that is, when the size T1 of the separator in the second direction is much larger than the size T2 of the battery cell in the second direction, the separator can absorb excessive deformation capacity. Strong, far exceeding the expansion and deformation space required by the battery cell. Compared with the battery cell, the separator occupies too much space inside the battery, which is not conducive to improving the energy density of the battery. Therefore, the value of T1/T2 is set to 0.04~2 , which can not only improve the energy density of the battery, but also absorb the expansion and deformation of the battery cell.

In a possible implementation manner, the dimension T1 of the separator in the second direction is not greater than 100 mm.

When the size T1 of the separator in the second 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, setting the value of T1 to be less than 100mm can effectively improve the energy density of the battery.

In a possible implementation manner, an insulating layer is provided on the outer surface of the separator, and a dimension T4 of the insulating layer along the second direction is 0.01-0.3 mm.

By disposing an insulating layer on the outer surface of the separator, the electrical connection between the battery cell and the separator is avoided, and the safety of the battery is improved. When the dimension T4 of the insulating layer in the second direction is too small, the insulating layer cannot effectively prevent the battery cell from being effectively connected. The electrical connection with the separator will cause the battery to have poor insulation. When the dimension T4 of the insulating layer in the second 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, set T4 The value of 0.01-0.3mm, which can not only improve the energy density of the battery, but also ensure the effective insulation between the battery cell and the separator.

In a possible implementation manner, the battery cell includes two first walls oppositely arranged in the second direction and two second walls oppositely arranged in the first direction, wherein , in the first direction, the second walls of two adjacent battery cells are opposite to each other.

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 partitions are alternately arranged in the second direction.

In this way, the first walls of the plurality of battery cells arranged in each row along the first direction X can be connected to the separator, and the plurality of battery cells arranged in each row along the first direction X can be connected as a whole through the separator, Thereby effectively improving the strength 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 the second direction. In this way, multiple rows of battery cells and multiple separators are connected to each other to form a whole, and are accommodated in the box, which can not only effectively fix each row of battery cells, but also ensure the overall energy density of the battery, thereby improving the battery's performance. performance.

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 second 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 partition plate is bonded to the first wall.

The partition plate is fixedly connected with the first wall by means of bonding, the structure is simple, and the processing and assembly are convenient.

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; providing a separator extending along the first direction and being connected to the plurality of batteries The first wall of each battery cell in the unit is connected, and the first wall is the wall with the largest surface area in the battery unit, wherein the dimension T1 of the separator in the second direction is greater than 5 mm, so The second direction is perpendicular to the first wall.

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 technical solution of the embodiment of the present application, a plurality of battery cells are arranged along the first direction, and the first wall with the largest surface area in each battery cell is connected to the separator extending along the first direction, and the separator Multiple battery cells are connected as a whole. In this case, there is no need to set up side plates in the battery, or no need to set up structures such as beams, which can maximize the space utilization inside the battery and improve the structure of the battery. strength and energy density, thereby improving battery performance.

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 diagram of an exploded structure of a battery cell disclosed in an embodiment of the present application;

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

5 is a partial cross-sectional view of a battery disclosed in an embodiment of the present application;

6 is a schematic structural diagram of a separator disclosed in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a battery cell disclosed in an embodiment of the present application;

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

9 is a schematic structural diagram of a battery module 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 flowchart of a method for preparing a battery according to an embodiment of the present application;

FIG. 12 is a schematic block 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 is connected, and the dimension T1 of the partition in the second direction perpendicular to the first wall is greater than 5mm. A plurality of battery cells are connected into a whole through a separator. In this case, no side plates or beams and other structures are required in the battery, which can maximize the space utilization inside the battery. Improve the structural strength and energy density of the battery, thereby improving the performance of the battery.

The technical solutions described in the embodiments of this application are all 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 and a separator 101 , and the separator 101 extends along the first direction X and is connected to each of the plurality of battery cells 20 . The first wall 201 of the body 20 is connected, and the first wall 201 is the wall with the largest surface area in the battery cell 20 .

In this way, the first wall 201 with the largest surface area of each of the plurality of battery cells 20 is connected to the separator 101 , and the plurality of battery cells 20 are connected as a whole through the separator 101 , in this case Therefore, the battery 10 can no longer be provided with side plates, and also need not be provided with structures such as beams, which can maximize the space utilization rate inside the battery 10 and improve the structural strength and energy density of the battery 10 .

In the embodiment of the present application, as shown in FIG. 5 , the dimension T1 of the partition plate 101 in the second direction Y is greater than 5 mm, and the second direction Y is perpendicular to the first wall 201 .

In the embodiment of the present application, the dimension T1 of the separator 101 in the second direction Y is not greater than 100 mm.

When the dimension T1 of the separator 101 in the second direction 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, setting the value of T1 to be less than 100 mm can effectively improve the battery 10 ’s energy density. Energy Density.

In the embodiment of the present application, as shown in FIG. 5 , a cavity 102 is provided inside the separator 101 .

In this way, the separator 101 provided with the cavity structure has the ability to absorb deformation, and can absorb the expansion and deformation of the battery cells 20 to improve the performance of the battery 10 .

Optionally, the cavity 102 may be used to contain a fluid to regulate the temperature of the battery cells 20 .

It should be understood that the fluid mentioned here may be a liquid that can adjust the temperature without chemically reacting with the material of the cavity 102, such as water, which is not limited in this application.

In this way, the temperature of the battery cells 20 can be conveniently adjusted at any time within a suitable range, thereby improving the stability and safety of the battery cells 20 .

In the embodiment of the present application, the partition plate 101 further includes a pair of sub-plates 103 disposed opposite to each other along the second direction Y, and the cavity 102 is disposed between the pair of sub-plates 103 .

In the embodiment of the present application, as shown in FIG. 5 , the dimension T3 of the sub-board 103 in the second direction Y is 0.1-5 mm.

When the dimension T3 of the sub-board 103 in the second direction is too small, the cavity 102 occupies most of the space of the separator 101 under the condition that the space inside the separator 101 is constant. In this case, the stiffness of the separator 101 It is very poor and cannot effectively improve the structural strength of the battery 10. When the dimension T3 of the sub-plate 103 in the second direction is too large, the cavity 102 inside the separator 101 is very small and can hold very little fluid, so the battery cannot be effectively adjusted. Because of the temperature of the monomer 20, the value of T3 is set to be 0.1 to 5 mm.

Optionally, the dimension T3 of the pair of sub-plates 103 of the separator in the second direction may be the same or different.

In the embodiment of the present application, the partition plate 101 further includes a reinforcing rib 105 , and the reinforcing rib 105 is disposed between the pair of sub-plates 103 .

Optionally, as shown in FIG. 6( a ), the reinforcing rib 105 may be provided on only one sub-board 103 , and as shown in FIG. 6( b ), the reinforcing rib 105 may also be provided on a pair of sub-boards 103 is connected to the pair of sub-boards 103 .

Optionally, as shown in (b) and (c) in FIG. 6 , the included angle between the reinforcing rib 105 and the sub-board 103 may be an acute angle. As shown in (a) in FIG. 6 , the reinforcing rib 105 and the The included angle between the plates 103 may also be a right angle.

In the embodiment of the present application, the dimension T1 of the separator 101 in the second direction Y and the dimension T2 of the battery cell 20 in the second direction Y satisfy: 0.04≤T1/T2≤2.

When T1/T2 is too small, that is, the dimension T1 of the separator 101 in the second direction is much smaller than the dimension T2 of the battery cell 20 in the second direction, the separator 101 has a weak ability to absorb deformation and cannot match the battery cell 20 When T1/T2 is too large, that is, the dimension T1 of the separator 101 in the second direction is much larger than the dimension T2 of the battery cell 20 in the second direction, The ability of the separator 101 to absorb deformation is too strong, far exceeding the expansion and deformation space required by the battery cell 20 . Compared with the battery cell 20 , the separator 101 occupies too much space inside the battery 10 , which is not conducive to improving the energy of the battery 10 . Therefore, the value of T1/T2 is set to be 0.04˜2, which can not only improve the energy density of the battery 10 but also absorb the expansion and deformation of the battery cells 20 .

In the embodiment of the present application, an insulating layer 104 is disposed on the outer surface of the separator 101 , and the dimension T4 of the insulating layer 104 along the second direction Y is 0.01-0.3 mm. Optionally, the insulating layer 104 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 .

By disposing the insulating layer 104 on the outer surface of the separator 101, the electrical connection between the battery cells 20 and the separator 101 is avoided, and the safety of the battery 10 is improved. When the dimension T4 of the insulating layer 104 in the second direction is too small, the insulating layer 104 cannot effectively avoid the electrical connection between the battery cell 20 and the separator 101, and the battery 10 will have poor insulation. When the dimension T4 of the insulating layer 104 in the second direction is too large, it will take up too much space inside the battery 10. , which is not conducive to improving the energy density of the battery 10 , so the value of T4 is set to 0.01-0.3 mm, which can not only improve the energy density of the battery 10 , but also ensure the effective insulation between the battery cell 20 and the separator 101 .

In the embodiment of the present application, as shown in FIG. 7 , the battery cell 20 includes two first walls 201 oppositely arranged in the second direction Y and two second walls oppositely arranged in the first direction X, wherein , in the first direction X, the second walls of two adjacent battery cells 20 are opposite to each other.

In the embodiment of the present application, as shown in FIG. 8 , the battery 10 includes a plurality of columns 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 plates 101 are alternately arranged in the second direction Y.

In this way, the first walls 201 of the plurality of battery cells 20 arranged in each row along the first direction X can be connected to the separator 101, and the plurality of battery cells 20 arranged in each row along the first direction X can pass through the separator 101 is connected as a whole, thereby effectively improving the strength of the battery 10 .

In the embodiment of the present application, the battery 10 includes a plurality of battery 10 modules. As shown in FIG. 9 , the battery 10 module includes at least one column of a plurality of battery cells 20 arranged along the first direction X and at least one separator 101 , and At least one row of battery cells 20 and at least one separator 101 are alternately arranged in the second direction Y.

In the embodiment of the present application, the battery module 100 includes N rows of battery cells 20 and N−1 separators 101 , the separators 101 are disposed between two adjacent rows of battery cells 20 , and N is an integer greater than 1. As shown in FIG. 11, N is 2 as an example for description.

In the embodiment of the present application, as shown in FIG. 10 , a plurality of battery modules 100 are arranged along the second direction Y, and there are gaps between adjacent battery modules 100 .

Optionally, a current collector 106 is provided at the end of the separator 101 in the first direction X, and a pipe 107 is provided inside the battery 10 .

In the embodiment of the present application, the partition plate 101 is bonded to the first wall 201 . The partition plate 101 is fixedly connected with the first wall 201 by means of bonding, the structure is simple, and the processing and assembly are convenient.

It should be understood that the separator 101 and the first wall 201 may also be connected by other means, for example, riveting, welding, etc., which are not limited in this application.

An embodiment of the present application further 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;

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, the first wall 201 being the battery cell 20 The wall with the largest surface area, wherein the dimension T1 of the partition 101 in the second direction Y is greater than 5 mm, and the second direction Y is perpendicular to the first wall 201 .

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: providing a module 410 .

A module 410 is provided for providing a plurality of battery cells 20 and separators 101 arranged along the first direction X, the separators 101 extending along the first direction X and being connected to each battery cell 20 of the plurality of battery cells 20 The first wall 201 is connected to the first wall 201, the first wall 201 is the wall with the largest surface area in the battery cell 20, wherein the dimension T1 of the separator 101 in the second direction Y is greater than 5mm, and the second direction Y is perpendicular to the first wall. 201.

Hereinafter, the Example of this application is demonstrated. The embodiments described below are exemplary, only used to explain the present application, and should not be construed as a limitation to 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 separators 101 shown in the drawings, 1C/1C charge-discharge cycles were carried out at 60° C. until the capacity decayed to 80% SOC, and the cycle endurance acceleration test results were carried out. The test results are shown in Table 1. . In Table 1, T1 is the dimension of the separator in the second direction X, and T2 is the dimension of the battery cell in the second direction X.

Table 1

T2(mm) T1(mm) T1/T2 Cycle endurance accelerated test results 125 5.1 0.041 The structure is not damaged, no diving 26.5 6 0.226 The structure is not damaged, no diving 12.5 25 2.000 The structure is not damaged, no diving 47.4 5.1 0.108 The structure is not damaged, no diving 44 20 0.455 The structure is not damaged, no diving 44 60 1.364 The structure is not damaged, no diving 70.7 70 0.990 The structure is not damaged, no diving 10 15 1.500 The structure is not damaged, no diving 44 30 0.682 The structure is not damaged, no diving 70.72 6 0.085 The structure is not damaged, no diving 10 6 0.6 The structure is not damaged, no diving

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 (16)

1. A battery (10), comprising:

a plurality of battery cells (20) arranged in a first direction;

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

wherein the dimension T1 of the partition (101) in a second direction perpendicular to the first wall (201) is greater than 5 mm.

2. The battery (10) according to claim 1, wherein the separator (101) is internally provided with a cavity (102).

3. The battery (10) of claim 2, wherein the cavity (102) is configured to contain a fluid to regulate the temperature of the battery cell (20).

4. The battery (10) of claim 2, wherein the separator (101) further comprises a pair of sub-plates (103) oppositely disposed along the second direction, the cavity (102) being disposed between the pair of sub-plates (103).

5. The battery (10) according to claim 4, wherein a dimension T3 of the sub-board (103) in the second direction is 0.1-5 mm.

6. The battery (10) of claim 4, wherein the separator (101) further comprises a stiffener (105), the stiffener (105) being disposed between the pair of sub-sheets (103).

7. The battery (10) according to claim 1, wherein a dimension T1 of the separator (101) in the second direction and a dimension T2 of the battery cell (20) in the second direction satisfy: T1/T2 is more than or equal to 0.04 and less than or equal to 2.

8. The battery (10) according to claim 1, wherein a dimension T1 of the separator (101) in the second direction is not greater than 100 mm.

9. The battery (10) according to claim 1, wherein an outer surface of the separator (101) is provided with an insulating layer (104), and a dimension T4 of the insulating layer (104) in the second direction is 0.01 to 0.3 mm.

10. The battery (10) according to claim 1, wherein the battery cell (20) comprises two first walls (201) oppositely disposed in the second direction and two second walls oppositely disposed in the first direction, wherein the second walls of two adjacent battery cells (20) are opposite in the first direction.

11. 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 the second direction.

12. 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 row of the plurality of battery cells (20) arranged in the first direction and at least one separator (101), and at least one row of the battery cells (20) and at least one separator (101) are alternately arranged in the second direction.

13. The battery (10) according to claim 12, wherein the battery module 100 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.

14. The battery (10) according to claim 12, wherein a plurality of the battery modules 100 are arranged in the second direction with a gap between adjacent battery modules 100.

15. The battery (10) according to any one of claims 1 to 14, wherein the separator (101) is bonded to the first wall (201).

16. An electrical device, comprising: the battery (10) according to any one of claims 1 to 15, the battery (10) being for providing electrical energy.

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