WO2023133737A1

WO2023133737A1 - Battery, power-consuming device, and method and device for preparing battery

Info

Publication number: WO2023133737A1
Application number: PCT/CN2022/071664
Authority: WO
Inventors: 侯羽佳; 陈兴地; 王鹏
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2023-07-20
Also published as: CN116325323A; CN219163609U

Abstract

Provided are a battery (10), a power-consuming device, and a method (300) and device (400) for preparing the battery (10). The battery (10) comprises: a battery cell (20); a box body (11) comprising a first cavity (111) and a second cavity (112), the battery cell (20) being accommodated in the first cavity (111); and a fixing plate (101) comprising a fixing portion (1011) and an extension portion (1012), the fixing portion (1011) being located in the first cavity (111) and being used for fixing the battery cell (20) to a first wall of the first cavity (111), and the extension portion (1012) being located in the second cavity (112) and being connected to a second wall (1121) of the second cavity (112), wherein the first wall and the second wall (1121) are different walls. According to the technical solution in embodiments of the present application, the safety of the battery (10) can be improved.

Description

Battery, electrical device, method and device for producing battery

technical field

The present application relates to the technical field of batteries, in particular to a battery, an electrical device, a method and a device for preparing a battery.

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 related to its development.

The structural strength of the battery affects the stability and safety of the battery, which in turn affects the safety performance of the battery. How to improve the safety performance of batteries is an urgent technical problem in battery technology.

Contents of the invention

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

In a first aspect, a battery is provided, including a battery cell, a box body and a fixing plate, the box body includes a first cavity and a second cavity, the battery cell is accommodated in the first cavity, The fixing plate includes a fixing part and an extension part, the fixing part is located in the first cavity, and is used to fix the battery cell to the first wall of the first cavity, and the extension part is located in the first cavity. The second cavity is connected to the second wall of the second cavity, wherein the first wall and the second wall are different walls.

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

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

The extension part connects the second wall opposite to the common wall, so that the second wall, the common wall and the extension form an I-shaped structure, further enhancing the structural strength and impact resistance of the battery.

In some embodiments, the second wall is perpendicular to the fixing part, a connecting part is provided at an end of the extending part close to the second wall, and the connecting part is along a direction parallel to the second wall. Extending, the connecting portion is fixedly connected to the second wall.

The connecting part extends parallel to the second wall and is fixedly connected with the second wall, which increases the contact area between the two and improves the stability of the connection between the two, and the connecting part is connected to the battery cell through the fixing part, so The stability of the connection between the battery cell and the box is improved.

In some embodiments, the extension part is provided with a buffer structure for absorbing the impact force on the second wall.

By arranging a buffer structure on the extension connected to the second wall, the buffer structure is used to absorb the impact force received by the second wall, so that the impact force received by the second wall can be reduced, and at the same time, the buffer structure absorbs the impact force received by the second wall The impact force also reduces the impact force of the battery cells transmitted to the box, thereby further enhancing the impact resistance of the battery.

In some embodiments, the cushioning structure is proximate to the junction of the extension and the second wall. The buffer structure is arranged close to the second wall, and when the second wall receives an impact force, the impact force can be absorbed by the buffer structure earlier, thereby improving the buffer effect of the buffer structure.

In some embodiments, the buffer structure includes a concave-convex structure or a bent structure. The buffering effect of the buffering structure can be improved by setting the buffering structure as a structure with a certain bending angle.

In some embodiments, the common wall of the first cavity and the second cavity is provided with an opening, and the extension part extends into the second cavity through the opening.

In order to improve the stability of the fixed plate, the fixed part and the extension part of the fixed plate are arranged into an integral structure, the fixed part is arranged in the first cavity, the extension part is arranged in the second cavity, and the first cavity and the second cavity Separated by the common wall, openings are provided on the common wall, so that the fixing part and the extension part of the fixing plate are respectively located in the first cavity and the second cavity in the case of an integral structure.

In some embodiments, the battery includes a battery module, and the battery module includes: N columns of the battery cells, wherein each column of the battery cells in the N columns of the battery cells includes A plurality of the battery cells arranged in one direction, the N columns of the battery cells are arranged along the second direction, N is an integer greater than 1, and the first direction is perpendicular to the second direction; and N- 1 said fixing plate, said fixing plate extends along said first direction and is arranged between two adjacent rows of said battery cells, said fixing part is connected with said two rows of said battery cells Each of the battery cells is fixedly connected; wherein, the end of the fixing part in the first direction is provided with a fixing structure, and the fixing part is fixed to the first wall through the fixing structure.

A fixing plate is arranged between two adjacent rows of battery cells of the battery module, the fixing part of the fixing plate is fixedly connected with each battery cell in the two rows of battery cells, and a fixing structure is arranged at the end of the fixing part , the fixing part is fixed to the box body through a fixing structure. In this way, each battery cell in the battery is fixed to the box body by the fixing portion and the fixing structure, so each battery cell can transmit its load to the box body, ensuring the structural strength of the battery.

In some embodiments, the fixing structure includes an end plate, the end plate is fixedly connected to the end of the fixing part, and fixed to the battery cell located at the end of the fixing part connected, the end plate is fixedly connected to the first wall. In this way, the effect of fixing the battery cells can be further enhanced.

In a second aspect, there is provided an electric device, including the battery in the above first aspect or any possible implementation manner of the first aspect, where the battery is used to provide electric energy.

In a third aspect, a method for preparing a battery is provided, including: providing a battery cell, providing a box body, the box body includes a first cavity and a second cavity, and providing a fixing plate, the fixing plate includes a fixing portion and an extension part for accommodating the battery cell in the first cavity, and fixing the battery cell to the first wall of the first cavity through the fixing part in the first cavity, The extension part extends into the second cavity and is connected to a second wall of the second cavity, wherein the first wall and the second wall are different walls.

In a fourth aspect, there is provided a device for preparing a battery, which includes providing a module for providing a battery cell, a box body, and a fixing plate, the box body includes a first cavity and a second cavity, and the fixing plate includes The fixing part and the extending part are used to install the battery cell in the first cavity, and the battery cell is fixed to the first cavity through the fixing part in the first cavity. the first wall of the cavity, the extension extending into the second cavity and connected to the second wall of the second cavity, wherein the first wall and the second wall are different wall.

In the technical solution of the embodiment of the present application, the fixing part of the fixing plate fixes the battery cell to the first wall of the first cavity, and the extension part of the fixing plate connected to the fixing part is connected to the second wall of the second cavity, That is to say, the battery cell is not only fixed to the first wall through the fixing part, but also connected to the second wall through the extension part connected to the fixing part, which increases the connection between the battery cell and the box and improves the structure of the battery. Strength and impact resistance, thus improving the safety performance of the battery.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on the accompanying drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present application;

2 is a schematic diagram of a battery according to an embodiment of the present application;

Fig. 3 is a schematic diagram of a battery cell according to an embodiment of the present application;

4 is a schematic diagram of a battery according to an embodiment of the present application;

Fig. 5 is a schematic diagram of a buffer structure of a fixed plate according to an embodiment of the present application;

6 is a schematic diagram of a battery according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a battery module according to an embodiment of the present application.

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

Fig. 9 is a schematic block diagram of a device for preparing a battery according to an embodiment of the present application.

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

Detailed ways

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

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

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 occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

The orientation words appearing in the following description are the directions shown in the figure, and do not limit the specific structure of the application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary. 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 describing associated objects, which means that there may be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and A and B exist alone. There are three cases of B. In addition, the character "/" in this application generally indicates that the contextual 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, which are not limited in the embodiments of the present application. The battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment 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, batteries mentioned in this application may include battery packs and the like. Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid 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. A battery cell works primarily by moving metal ions between the positive and negative plates. 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 not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. 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 cobaltate, lithium iron phosphate, ternary lithium or lithium manganate. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the 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 serves as the negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current is passed without fusing, the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together. The material of the isolation film can be polypropylene (PP) or polyethylene (PE). In addition, the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.

In order to meet different power requirements, the battery may include multiple battery cells, wherein the multiple battery cells may be connected in series, in parallel or in parallel, and the hybrid connection refers to a mixture of series and parallel connections. Optionally, a plurality of battery cells can be connected in series, parallel or mixed to form a battery module, and then a plurality of battery modules can be connected in series, parallel or mixed to form a battery. That is to say, multiple battery cells can directly form a battery, or form a battery module first, and then form a battery from the battery module. The battery is further arranged in the electric device to provide electric energy for the electric device.

The development of battery technology should consider many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate, safety and so on. Among them, the structural strength of the battery is insufficient, which will affect the safety performance of the battery.

In view of this, the embodiment of the present application provides a technical solution. A fixing plate is provided in the box, the fixing part of the fixing plate is located in the first cavity of the box, and the battery cell is fixed to the first cavity of the first cavity through the fixing part. The wall, the fixing part of the fixing plate extends into the second cavity of the box body to form an extension part, and is connected to the second wall of the second cavity. In this way, the battery cell is not only fixed to the first wall through the fixing part, but also connected to the second wall through the extension part connected to the fixing part, which increases the connection between the battery cell and the box, and improves the structural strength and resistance of the battery. Impact capability, thereby improving the safety performance of the battery.

The technical solutions described in the embodiments of the present 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, etc. For example, spacecraft include Airplanes, 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 limited to the devices described above, but also applicable to all devices using batteries. However, for the sake of brevity, the following embodiments take electric vehicles as examples for illustration.

For example, as shown in Figure 1, it is a schematic structural diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or Extended range cars, etc. A motor 40 , a controller 30 and a battery 10 can be arranged inside the vehicle 1 , 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 or front or rear of the vehicle 1 . The battery 10 can be used for power supply of the vehicle 1 , for example, the battery 10 can be used as an operating power source of the vehicle 1 , for a circuit system of the vehicle 1 , for example, for starting, navigating and running power requirements of the vehicle 1 . In another embodiment of the present application, the battery 10 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

In order to meet different power requirements, the battery 10 may include multiple 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 box body 11 , the inside of which is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body 11 . For example, a plurality of battery cells 20 are placed in the case 11 after being connected in parallel, in series or in parallel.

According to different power requirements, the number of battery cells 20 can be set to any value. Multiple battery cells 20 can be connected in series, in parallel or in parallel to achieve greater capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for the convenience of 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. A battery may include a plurality of battery modules, which may be connected in series, in parallel or in parallel.

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 housing 211 and the cover plate 212 form the housing or battery compartment 21 . The walls of the casing 211 and the cover plate 212 are both called the walls of the battery cell 20 , wherein for the rectangular parallelepiped battery cell 20 , the walls of the casing 211 include a bottom wall and four side walls. The housing 211 depends on the combined shape of one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid or cube or cylinder, and one of the surfaces of the housing 211 has an opening so that one or more electrodes Assembly 22 may be placed within housing 211 . For example, when the housing 211 is a hollow cuboid or cube, one of the planes of the housing 211 is an open surface, that is, the plane does not have a wall so that the inside and outside of the housing 211 communicate. When the casing 211 can be a hollow cylinder, the end surface of the casing 211 is an open surface, that is, the end surface does not have a wall so that the inside and outside of the casing 211 communicate. The cover plate 212 covers the opening and is connected with the casing 211 to form a closed cavity for placing the electrode assembly 22 . The casing 211 is filled with electrolyte, such as electrolytic solution.

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 usually in the shape of a flat plate, and two electrode terminals 214 are fixed on the flat plate surface of the cover plate 212, and the two electrode terminals 214 are positive electrode terminals 214a and negative electrode terminals 214b respectively. Each electrode terminal 214 is correspondingly provided with a connection member 23 , or also called 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 connection member 23 , and the second tabs 222a of one or more electrode assemblies 22 are connected to another electrode terminal through another connection 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 usage requirements, the electrode assembly 22 can be arranged as a single one or in multiples. As shown in FIG. 3 , four independent electrode assemblies 22 are arranged 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 activated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold.

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 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 configured 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 diagram of a battery 10 according to an embodiment of the present application. As shown in FIG. 4 , the battery 10 includes a battery cell 20 , a case 11 and a fixing plate 101 . The box body 11 includes a first cavity 111 and a second cavity 112, and the battery cell 20 is accommodated in the first cavity 111; the fixing plate 101 includes a fixing part 1011 and an extension part 1012, and the fixing part 1011 is located in the first cavity 111 Inside, for fixing the battery cell 20 to the first wall of the first cavity 111, the extension 1012 is located in the second cavity 112 and connected to the second wall 1121 of the second cavity 112, the first wall and The second wall 1121 is a different wall.

The box body 11 is divided into two cavities, the first cavity 111 and the second cavity 112 , the battery cell 20 is located in the first cavity 111 , and the first wall of the first cavity 111 passes through the fixing part 1011 of the fixing plate 101 Fixed with the battery cell 20, the first wall may be the side wall of the first cavity, or the bottom wall of the first cavity. The extension portion 1012 of the fixing plate 101 is formed by extending the fixing portion 1011 into the second cavity 112 . For example, the fixing part 1011 and the extension part 1012 of the fixing plate 101 can be an integrally formed structure, and this integrally formed structure can be obtained through various processing techniques, such as machining, mold processing, and the like. The fixing plate 101 can be a metal plate, for example, it can be a steel plate or an aluminum plate, or it can be a plastic plate, and the material of the fixing plate 101 can also be a composite material, for example, other materials are coated on the surface of the metal plate. Not limited.

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

In one implementation, as shown in FIG. 4 , the battery cells 20 are disposed on the common wall 1131 of the first cavity 111 and the second cavity 112, and the common wall 1131 is used to separate the The first cavity 111 and the second cavity 112 , the second wall 1121 is opposite to the common wall 1131 .

The common wall 1131 is opposite to the second wall 1121 , as shown in FIG. 4 , the common wall 1131 is the bottom wall of the first cavity 111 . As mentioned above, the first wall of the first cavity 111 can be the side wall or the bottom wall of the first cavity 111. In the case that the first wall of the first cavity 111 is the bottom wall, the common wall 1131 and the first The walls are the same wall.

The second wall 1121 opposite to the common wall 1131 is connected by the extension part 1012, so that the second wall 1121, the common wall 1131 and the extension part 1012 form an I-shaped structure, which further enhances the structural strength and impact resistance of the battery.

In one implementation, as shown in FIG. 4 , the second wall 1121 is perpendicular to the fixing portion 1011 , and one end of the extension portion 1012 close to the second wall 1121 is provided with a connecting portion 1013 , and the connecting portion 1013 is parallel to the second wall 1121 . Extending in the direction of , the connecting portion 1013 is fixedly connected to the second wall 1121 .

The connection part 1013 can be fixed to the second wall 1121 by connection means such as resistance welding, resistance riveting, self piercing rivet (SPR), locking bolts, clamping or bonding, which is not included in this embodiment of the present application. limited.

The connecting part 1013 extends parallel to the second wall 1121 and is fixedly connected with the second wall 1121. The entire connecting part 1013 can be in contact with the second wall 1121, which increases the contact area between the two, thereby strengthening the connection between the connecting part 1013 and the second wall 1121. The connection between the two walls 1121 is stable, and the connection part 1013 is connected to the battery cell 20 through the fixing part 1011, thereby improving the stability of the battery cell 20 in the box.

In one implementation manner, the extension part 1012 is provided with a buffer structure 1014 for absorbing the impact force received by the second wall 1121 . In this way, the impact force received by the second wall 1121 can be reduced, and at the same time, the buffer structure 1014 absorbs the impact force received by the second wall 1121, thereby reducing the impact force transmitted to the battery cells 20 in the box body 11, further Enhance the impact resistance of the battery.

In one implementation manner, the buffer structure 1014 is close to the junction of the extension part 1012 and the second wall 1121 . The buffer structure 1014 is disposed close to the second wall 1121 , and when the second wall 1121 receives an impact force, the impact force can be absorbed by the buffer structure 1014 earlier, thereby improving the buffer effect of the buffer structure 1014 .

In an implementation manner, the buffer structure 1014 may include a concave-convex structure as shown in FIG. 5(a) or a bent structure as shown in FIG. 5(b).

It should be understood that the concave-convex structure or the bent structure are two structures that the cushioning structure 1014 has a better cushioning effect, and any other structure that can play a cushioning effect is acceptable, which is not limited in this embodiment of the present application. In addition, one or more buffer structures 1014 of the extension part 1012 may be provided, which is not limited in this embodiment of the present application.

By arranging the buffer structure 1014 as a structure with a certain bending angle, the buffer effect of the buffer structure 1014 can be improved.

In one implementation, as shown in FIG. 4 , the common wall 1131 of the first cavity 111 and the second cavity 112 is provided with an opening 1130 , and the extension part 1012 extends into the second cavity 112 through the opening 1130 . In order to improve the stability of the fixed plate 101, the fixed part 1011 and the extension part 1012 of the fixed plate 101 are provided as an integral structure, the fixed part 1011 is arranged in the first cavity 111, and the extension part 1012 is arranged in the second cavity 112, The first cavity 111 and the second cavity 112 are separated by a common wall 1131, so an opening 1130 is provided on the common wall 1131, so that the fixed part 1011 and the extension part 1012 of the fixed plate 101 are respectively located in the integrated structure. Inside the first cavity 111 and the second cavity 112 .

In one implementation, the battery 10 includes a battery module 100 . As shown in FIG. 6 , the battery module 100 includes N columns of battery cells 20 and N−1 fixing plates 101 . N is an integer greater than 1. In the drawings of this application, N is 2 as an example, that is, the battery module 100 includes two rows of battery cells 20 and one fixing plate 101 , but this is not limited in this embodiment of the application. For example, the battery module 100 may also include more rows of battery cells 20 .

Each column of battery cells 20 in the N columns of battery cells 20 includes a plurality of battery cells 20 arranged along a first direction, for example, the x direction in FIG. 6 . N columns of battery cells 20 are arranged along a second direction, for example, the y direction in FIG. 6 , and the first direction is perpendicular to the second direction. That is to say, the first direction is the direction in which the battery cells 20 are arranged in each row of battery cells 20 , and the second direction is the direction in which the battery cells 20 in N rows are arranged.

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

In the embodiment of the present application, the battery module 100 includes N rows of battery cells 20 and N−1 fixing plates 101 , and the N−1 fixing plates 101 are arranged between the N rows of battery cells 20 . That is to say, the fixing plate 101 is disposed inside the battery module 100 , and the fixing plate 101 is not disposed outside the battery module 100 . For example, one fixing plate 101 is arranged between two rows of battery cells 20 , two fixing plates 101 are arranged between three rows of battery cells 20 , and so on. Through such an arrangement, less fixing plates 101 can be utilized so that each battery cell 20 in the battery module 100 can be fixedly connected by the fixing plates 101 .

In one implementation manner, as shown in FIG. 7 , a fixing structure 102 is provided at an end of the fixing part 1011 in the first direction, and the fixing part 1011 is fixed to the box body 11 through the fixing structure 102 . The fixing structures 102 are disposed at both ends of the fixing part 1011 in the x direction. The fixing part 1011 is fixed to the box body 11 through the fixing structure 102 , thereby realizing fixing the battery module 100 to the box body 11 . As mentioned above, each battery cell 20 in the battery module 100 is fixedly connected by the fixing portion 1011 of the fixing plate 101 , and each battery cell 20 is fixedly connected to the box body 11 through the fixing structure 102 .

The fixing part 1011 of the fixing plate 101 extends to the extension part 1012 formed in the second cavity 112 and is connected to the second wall 1121 of the box body 11 , and the battery cell 20 is indirectly fixed to the box body 11 through the extension part 1012 . That is, the battery cells 20 are respectively connected to different walls of the box body 11 through the fixing portion 1011 and the extension portion 1012 of the fixing plate 101 , which improves the stability of fixing the battery cells 20 to the box body 11 .

In the embodiment of the present application, a fixing plate 101 is provided between two adjacent rows of battery cells 20 of the battery module 100 , and the fixing portion 1011 of the fixing plate 101 is in contact with each battery cell in the two rows of battery cells 20 The body 20 is fixedly connected, and a fixing structure 102 is provided at the end of the fixing part 1011 of the fixing plate 101 , and the fixing part 1011 is fixed to the box body 11 through the fixing structure 102 . In this way, each battery cell 20 in the battery 10 is fixed to the box body 11 by the fixing part 1011 and the fixing structure 102, so each battery cell 20 can transfer its load to the box body 11, ensuring the structure of the battery 10 Strength, thereby improving the safety performance of the battery 10 .

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

Adjacent battery cells 20 in each row of battery cells 20 in N rows of battery cells 20 may also be bonded, for example, by structural adhesive bonding, but this embodiment of the present application is not limited thereto. The fixing effect of the battery cells 20 can be further enhanced by fixing between adjacent battery cells 20 in each row of battery cells 20 .

In an implementation manner, the battery 10 may include a plurality of battery modules 100 arranged along the second direction, with gaps between adjacent battery modules 100 . That is, a plurality of battery modules 100 are arranged along the y direction, and there is no fixing plate 101 between adjacent battery modules 100 , and there is a certain gap. That is to say, in one battery module 100 , the fixing plate 101 is provided between two rows of battery cells 20 , but the fixing plate 101 is not provided between adjacent battery modules 100 . In this way, on the one hand, the fixing plate 101 inside the battery 10 can be reduced as much as possible; on the other hand, a certain gap can be formed between adjacent battery modules 100 to provide expansion space for the battery cells 20 .

In one implementation, the battery module 100 includes two rows of battery cells 20 , that is, N is two. Correspondingly, one fixing plate 101 is provided in two rows of battery cells 20 . As mentioned above, there is no fixing plate 101 between adjacent battery modules 100, so this embodiment can set fewer fixing plates 101 in the battery 10, but at the same time, it can ensure that each battery cell 20 can be fixed to The fixed part 1011 of the fixed plate 101 is connected to the box body 11 through the fixed part 1011 and the fixed structure 102 . Meanwhile, the battery cell 20 is indirectly fixed to the box body 11 through the extension portion 1012 of the fixing plate 101 , that is, the battery cell 20 is respectively connected to different walls of the box body 11 through the fixing portion 1011 and the extension portion 1012 of the fixing plate 101 .

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

In one implementation, as shown in FIG. 7 , the fixing structure 102 includes an end plate 103, the end plate 103 is fixedly connected to the end of the fixing part 1011, and is fixedly connected to the battery cell 20 located at the end of the fixing part 1011. , the end plate 103 is fixedly connected with the first wall, for example, when the first wall is the bottom wall of the first cavity, the end plate 103 can be directly connected with the bottom wall, or a boss can be set on the bottom wall, and the end plate 103 can pass through It is connected with the boss and fixed on the bottom wall. The end plate 103 can be connected to the end of the fixing part 1011. For example, for the rectangular parallelepiped battery cell 20, the end plate 103 can be vertically connected to the fixing part 1011, and respectively connected to two ends of the rectangular parallelepiped battery cell 20 with the fixing part 1011. Adjacent side walls further enhance the fixing effect on the battery cells 20 .

The end plate 103 can be made of the same material as the fixing plate 101, for example, metal, plastic or composite material. A material different from that of the fixing plate 101 may also be used, which is not limited in this embodiment of the present application.

The connection method between the fixed plate 101 and the end plate 103 can be connection methods such as resistance welding, resistance riveting, SPR, locking bolts or clamping; the end plate 103 can also be connected by resistance welding, resistance riveting, SPR, locking bolts or clamping. and other connection methods are fixed to the first wall, but this is not limited in the embodiment of the present application.

In another implementation, the battery includes a battery module 100, the battery module 100 includes a plurality of battery cells 20 and side plates and/or end plates, the side plates and/or end plates are used to surround the plurality of battery cells 20 to A plurality of battery cells 20 are fixed, and the battery module 100 is fixed to the first wall through side plates and/or end plates, and the side plates and/or end plates are the aforementioned fixing plates 101 .

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

The exteriors of the plurality of battery cells 20 may be surrounded by end plates and side plates at the same time, or only side plates or end plates may be provided. For example, the exterior of the plurality of battery cells 20 is surrounded by end plates and side plates, and the side plates and end plates are vertically arranged on the exterior of the plurality of battery cells 20 .

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

The fixing part 1011 of the side plate and the end plate extends to the extension part 1012 formed in the second cavity 112 and is connected to the second wall 1121 of the box body 11 , and the battery cell 20 is indirectly fixed to the box body 11 through the extension part 1012 . That is, the battery cells 20 are respectively connected to different walls of the box body 11 through the fixing portions 1011 and extension portions 1012 of the side plates and end plates, which improves the stability of fixing the battery cells 20 to the box body 11 .

The fixing portion 1011 of the side plate and the end plate may be fixedly connected to the peripheral battery cells 20 of the battery module 100 by bonding. For example, the fixing part 1011 and the peripheral battery cells 20 of the battery module 100 can be bonded by structural glue, but this embodiment of the present application is not limited thereto.

Each battery cell 20 among the plurality of battery cells 20 may also be bonded, for example, by structural adhesive bonding, but this embodiment of the present application is not limited thereto. The fixing effect of the battery cells 20 can be further enhanced by fixing each of the battery cells 20 among the plurality of battery cells 20 .

An embodiment of the present application also provides an electric device, including the battery 10 in the above embodiment. Optionally, the electric device can be a vehicle 1, a ship or a spacecraft, etc., but this embodiment of the present application does not Not limited.

The battery 10 and the electrical device of the embodiment of the present application are described above, and the method and device for preparing the battery of the embodiment of the present application will be described below, and the parts that are not described in detail can be referred to the foregoing embodiments.

FIG. 8 shows a schematic flowchart of a method 300 for preparing a battery according to an embodiment of the present application. As shown in Figure 8, the method 300 may include:

310, providing battery cells 20;

320. Provide a box body 11, where the box body 11 includes a first cavity 111 and a second cavity 112;

330. Provide a fixing plate 101, where the fixing plate 101 includes a fixing portion 1011 and an extension portion 1012;

340, accommodate the battery cell 20 in the first cavity 111, fix the battery cell 20 to the first wall of the first cavity 111 through the fixing part 1011 in the first cavity 111, and extend the extension part 1012 to the first wall of the first cavity 111 The second cavity 112 is connected to the second wall 1121 of the second cavity 112 , wherein the first wall and the second wall 1121 are different walls.

FIG. 9 shows a schematic block diagram of a device 400 for preparing a battery according to an embodiment of the present application. As shown in FIG. 9 , the device 400 for preparing a battery may include: a providing module 410 and an installing module 420 .

Provide a module 410 for providing battery cells 20, a box body 11 and a fixing plate 101, the box body 11 includes a first cavity 111 and a second cavity 112, and the fixing plate 101 includes a fixing part 1011 and an extension part 1012;

The installation module 420 is used for accommodating the battery cell 20 in the first cavity 111, and fixing the battery cell 20 to the first cavity 111 through the fixing part 1011. The first wall of the first cavity 111, the extension part 1012 extends into the second cavity 112 and is connected to the second wall 1121 of the second cavity 112, wherein the first wall and The second wall 1121 is a different wall.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments 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

A battery (10), characterized in that it comprises:

battery cells (20);

A box (11), the box (11) includes a first cavity (111) and a second cavity (112), the battery cell (20) is accommodated in the first cavity (111) ;as well as

A fixed plate (101), the fixed plate (101) includes a fixed part (1011) and an extension part (1012), the fixed part (1011) is located in the first cavity (111), and is used to place the The battery cell (20) is fixed on the first wall of the first cavity (111), and the extension part (1012) is located in the second cavity (112) and connected to the second cavity (112) The second wall (1121), wherein the first wall and the second wall (1121) are different walls.
The battery (10) according to claim 1, characterized in that, the battery cells (20) are arranged on the common wall (1131) of the first cavity (111) and the second cavity (112) ), the common wall (1131) is used to separate the first cavity (111) and the second cavity (112), and the second wall (1121) is opposite to the common wall (1131) set up.
The battery (10) according to claim 1 or 2, characterized in that, the second wall (1121) is perpendicular to the fixing part (1011), and the extension part (1012) is close to the second wall One end of (1121) is provided with a connection part (1013), and the connection part (1013) extends along a direction parallel to the second wall (1121), and the connection part (1013) is connected to the second wall (1121) ) fixed connection.
The battery (10) according to any one of claims 1 to 3, characterized in that, the extension part (1012) is provided with a buffer structure (1014) for absorbing the impact on the second wall (1121) impact.
The battery (10) according to claim 4, characterized in that, the buffer structure (1014) is close to the junction of the extension (1012) and the second wall (1121).
The battery (10) according to claim 4 or 5, characterized in that the buffer structure (1014) comprises a concave-convex structure or a bent structure.
The battery (10) according to any one of claims 1 to 6, characterized in that, the common wall (1131) of the first cavity (111) and the second cavity (112) is provided with an opening (1130), the extension part (1012) extends into the second cavity (112) through the opening (1130).
The battery (10) according to any one of claims 1 to 7, characterized in that the battery (10) includes a battery module (100), and the battery module (100) includes:

N columns of battery cells (20), wherein each column of battery cells (20) in the N columns of battery cells (20) includes a plurality of battery cells arranged along a first direction body (20), the N columns of battery cells (20) are arranged along a second direction, N is an integer greater than 1, and the first direction is perpendicular to the second direction; and

N-1 fixing plates (101), the fixing plates (101) extend along the first direction and are arranged between two adjacent rows of the battery cells (20), the fixing parts ( 1011) being fixedly connected to each of the battery cells (20) in the two rows of the battery cells (20);

Wherein, the end of the fixing part (1011) in the first direction is provided with a fixing structure (102), and the fixing part (1011) is fixed to the first wall through the fixing structure (102).
The battery (10) according to claim 8, characterized in that, the fixing structure (102) comprises an end plate (103), and the end plate (103) is connected to the end of the fixing part (1011) It is fixedly connected to the battery cell (20) located at the end of the fixing part (1011), and the end plate is fixedly connected to the first wall.
An electrical device, characterized by comprising: the battery (10) according to any one of claims 1 to 9, the battery (10) being used to provide electrical energy.
A method of preparing a battery (10), characterized in that it comprises:

providing (310) battery cells (20);

providing (320) a case (11), said case (11) comprising a first cavity (111) and a second cavity (112); and

providing (330) a fixing plate (101), said fixing plate (101) comprising a fixing portion (1011) and an extension portion (1012);

The battery cell (20) is accommodated in the first cavity (111), and the battery cell (20) is fixed in the first cavity (111) through the fixing part (1011) fixed on the first wall of the first cavity (111), the extension part (1012) extends into the second cavity (112), and is connected to the first wall of the second cavity (112). Two walls (1121), wherein the first wall and the second wall (1121) are different walls.
A device for preparing a battery (10), characterized in that it comprises:

A module (410) is provided for providing a battery cell (20), a box (11) and a fixing plate (101), the box (11) including a first cavity (111) and a second cavity (112 ), the fixed plate (101) includes a fixed portion (1011) and an extension portion (1012); and

The installation module (420) is used for accommodating the battery cell (20) in the first cavity (111), and fixing the battery cell (20) in the first cavity (111) through the fixing part (1011) The battery cell (20) is fixed on the first wall of the first cavity (111), the extension part (1012) extends into the second cavity (112), and is connected to the first The second wall (1121) of the second cavity (112), wherein the first wall and the second wall (1121) are different walls.