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

Abstract

A battery module (100), a battery (10), an electrical device, a method (300) for manufacturing a battery, and a device (400) are provided. The battery module (100) includes: N columns 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 in a first direction, the N columns of battery cells (20) are arranged in a second direction, and N is an integer greater than 1; N - 1 partitions (101), the partitions (101) extend in the first direction and are disposed between adjacent two columns of battery cells (20), and the partitions (101) are fixedly connected to each battery cell (20) in the two columns of battery cells (20); wherein, a fixing structure (102) is disposed at an end of the partition (101) in the first direction, and the fixing structure (102) is used for fixing the partition (101) to a box body (11), and wherein, the box body (11) is used for accommodating the battery module (100). The technical solution of the embodiment of the present application can improve the performance of the battery.

Description

[0001] Cross - Reference to Related Applications

[0002] This application claims the priority of International Application PCT / CN2021 / 107721, entitled "Battery, Electrical Equipment, Method and Equipment for Preparing Battery", filed on July 21, 2021, the entire content of which is incorporated herein by reference. Technical Field

[0003] This application relates to the technical field of batteries, and in particular to a battery module, a battery, electrical equipment, a method and equipment for preparing a battery. Background Art

[0004] 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.

[0005] The space utilization rate inside the battery affects the battery's power and energy density, and thus affects the battery's performance. How to improve the battery's performance is an urgent technical problem in battery technology. Summary of the Invention

[0006] This application provides a battery module, a battery, electrical equipment, a method and equipment for preparing a battery, which can improve the energy density of the battery while ensuring the structural strength of the battery, thereby improving the performance of the battery.

[0007] In a first aspect, a battery module is provided, including: N columns of battery cells, each column of battery cells in the N columns of battery cells includes a plurality of battery cells arranged along a first direction, the N columns of battery cells are arranged along a second direction, N is an integer greater than 1, and the first direction is perpendicular to the second direction; N - 1 partitions, the partitions extend along the first direction and are disposed between adjacent two columns of battery cells, and the partitions are fixedly connected to each battery cell in the two columns of battery cells; wherein, a fixing structure is provided at an end of the partition in the first direction, and the fixing structure is used to fix the partition to a box body, and the box body is used to accommodate the battery module.

[0008] In an embodiment of the present application, a partition is provided between two adjacent columns of battery cells in a battery module. The partition is fixedly connected to each battery cell in the two columns of battery cells, and a fixing structure is provided at the end of the partition. The partition is fixed to the box body through the fixing structure. In this way, each battery cell in the battery is fixed to the box body by the partition and the fixing structure, so that each battery cell can transfer its load to the box body, ensuring the structural strength of the battery; in this case, side plates may not be provided on the outside of the battery module, and structures such as beams do not need to be provided in the middle of the box body, which can greatly improve the space utilization rate inside the battery, thereby improving the energy density of the battery. Therefore, the technical solution of the embodiment of the present application can ensure the structural strength of the battery while improving the energy density of the battery, thereby improving the performance of the battery.

[0009] In a possible implementation, the thickness of the partition may be 0.1 - 5 mm, 0.2 - 2 mm, 0.3 - 1 mm, 0.1 - 0.5 mm, or 0.2 - 0.4 mm. Using a partition with this thickness can reduce the space occupied by the partition while ensuring strength.

[0010] In a possible implementation, the adjacent battery cells in each column of battery cells may also be bonded, for example, by structural adhesive. The fixation between adjacent battery cells in each column of battery cells can further enhance the fixation effect of the battery cells.

[0011] In a possible implementation, the fixing structure includes a fixing plate, the fixing plate is fixedly connected to the end of the partition, and is fixedly connected to the battery cell located at the end of the partition. In this way, the fixing effect on the battery cell can be further enhanced.

[0012] In a possible implementation, the fixing plate includes a first connecting portion extending in a direction away from the battery module along the first direction, and the first connecting portion is used to connect the wall of the box body.

[0013] By connecting the wall of the box body through the first connecting portion, the fixed connection between the fixing plate and the wall of the box body can be realized, so that the load of the battery cell can be transferred to the wall of the box body, thereby ensuring the structural strength of the battery.

[0014] In a possible implementation, the first connecting portion may be formed by bending the fixing plate. For example, the first connecting portion may be formed by bending the edge of the fixing plate close to the connected wall in a direction away from the battery module. In this way, the first connecting portion and the main body of the fixing plate are an integral structure, thereby enhancing the connection performance.

[0015] In a possible implementation, the fixed plate further includes a second connecting portion extending away from the battery module in the first direction, and the second connecting portion is used to connect a first connecting bar, wherein the first connecting bar is used to connect a plurality of the battery modules in the box body.

[0016] Connecting the first connecting bar through the second connecting portion can further ensure the structural strength of the battery at a position away from the bottom wall of the box body through the first connecting bar.

[0017] In a possible implementation, the second connecting portion can be formed by bending the fixed plate. For example, the second connecting portion can be formed by bending the edge of the fixed plate close to the first connecting bar away from the battery module. In this way, the second connecting portion and the main body of the fixed plate are of an integral structure, thereby enhancing the connection performance.

[0018] In a possible implementation, the fixed plate further includes a third connecting portion extending away from the battery module in the first direction, and the third connecting portion is used to connect the fixed plate and the partition. Connecting the partition through the third connecting portion can realize the fixed connection between the fixed plate and the partition and ensure the connection performance between the two.

[0019] In a possible implementation, the third connecting portion can be formed by bending the fixed plate. For example, the third connecting portion can be formed by bending the edge of the fixed plate close to the partition away from the battery module. In this way, the third connecting portion and the main body of the fixed plate are of an integral structure, thereby enhancing the connection performance.

[0020] In a possible implementation, the end portion of the partition protrudes from the N rows of battery cells in the first direction, and the fixing structure includes a first protruding portion where the end portion of the partition protrudes from the N rows of battery cells in the first direction. Connecting the wall of the box body through the first protruding portion can transfer the load of the battery cells to the wall of the box body, thereby ensuring the structural strength of the battery.

[0021] In a possible implementation, the fixing structure further includes a first extension portion, the first extension portion is fixedly connected to the first protruding portion and extends in the second direction, and the first extension portion is used to connect the wall of the box body.

[0022] Connecting the wall of the box body through the first extension portion can realize the fixed connection between the partition and the wall of the box body, thereby transferring the load of the battery cells to the wall of the box body, thereby ensuring the structural strength of the battery.

[0023] In a possible implementation, the first extension portion and the first protruding portion can be integrally formed, which can enhance the connection performance.

[0024] In a possible implementation, the fixed structure further includes a second extension portion, which is fixedly connected to the first protruding portion and extends along the second direction. The second extension portion is used to connect a first connecting bar, wherein the first connecting bar is used to connect a plurality of the battery modules within the box body.

[0025] By connecting the first connecting bar through the second extension portion, the structural strength of the battery can be further ensured by the first connecting bar at a position far from the bottom wall of the box body.

[0026] In a possible implementation, the second extension portion and the first protruding portion can be integrally formed, which can enhance the connection performance.

[0027] In a possible implementation, the battery module further includes: an attachment plate, which extends along the first direction and is fixedly connected to the partition. The attachment plate protrudes from the partition along the second direction and is attached to each battery cell in two adjacent columns of battery cells. The fixation effect on the battery cells can be further strengthened through the attachment plate.

[0028] In a possible implementation, the attachment plate is fixedly connected to each battery cell in two adjacent columns of battery cells. In this way, each battery cell is fixed by the attachment plate and the partition, thereby further improving the fixation effect.

[0029] In a possible implementation, the attachment plate protrudes from the N columns of battery cells in the first direction, and the fixed structure includes a second protruding portion where the attachment plate protrudes from the N columns of battery cells in the first direction.

[0030] By connecting the wall of the box body through the second protruding portion, the load of the battery cells can be transmitted to the wall of the box body, thereby ensuring the structural strength of the battery.

[0031] In a possible implementation, the partition and the attachment plate are integrally formed. This can improve the connection performance between the partition and the attachment plate.

[0032] In a possible implementation, N is 2. In this way, fewer partitions can be provided in the battery, but at the same time, it can be ensured that each battery cell can be fixed to the partition and connected to the box body through the partition and the fixed structure.

[0033] In a possible implementation, the battery cell is a cuboid battery cell, and the cuboid battery cell includes two opposite first side walls and two opposite second side walls. The area of the first side wall is larger than the area of the second side wall, and the partition is fixedly connected to the first side wall.

[0034] The narrow side walls of each column of battery cells are connected, so as to be arranged in a column along the first direction; the partition is fixedly connected to the wide side wall of each battery cell, so that the partition can more easily receive the load of the battery cell, thereby facilitating the transfer of the load of the battery cell to the box body.

[0035] In a possible implementation, the partition has an opening corresponding to the first side wall, and the area of the opening is smaller than the area of the first side wall. Arranging an opening on the partition can reduce the profile of the partition, thereby reducing the weight of the partition.

[0036] In a possible implementation, the battery cell is a cylindrical battery cell, and the partition is an S-shaped partition adapted to the side surface of the cylindrical battery cell, so that each battery cell can be better connected.

[0037] In a possible implementation, the partition is a heat insulation plate, a cooling plate or a heating plate. In this way, while fixing the battery cells, heat insulation between the battery cells or cooling or heating of the battery cells can be achieved.

[0038] In a second aspect, a battery is provided, including the battery module in the first aspect or any possible implementation of the first aspect; and a box body for accommodating the battery module.

[0039] In a possible implementation, the battery includes a plurality of the battery modules, and the plurality of battery modules are arranged along the second direction, and there is a gap between adjacent battery modules.

[0040] Within a battery module, a partition is arranged between two columns of battery cells, and no partition is arranged between adjacent battery modules. In this way, on the one hand, the partitions inside the battery can be minimized as much as possible, and on the other hand, a certain gap can be formed between adjacent battery modules to provide expansion space for the battery cells.

[0041] In a possible implementation, the fixing plates corresponding to the plurality of battery modules are of an integral structure. The fixing plates corresponding to the plurality of battery modules are a single whole plate, and the plurality of battery modules are fixed to the box body through this single whole plate, thereby improving the overall structural strength of the plurality of battery modules.

[0042] In a possible implementation, the fixing plate is provided with a limiting strip corresponding to the battery module, and the limiting strip is used to be inserted into the gap between adjacent battery modules. This can facilitate the installation of the battery module.

[0043] In a possible implementation, the partition is integrally formed with the box body, so as to improve the connection performance between the partition and the box body.

[0044] In a possible implementation, the battery further includes: a busbar component for electrically connecting to the battery cells; wherein, at least three battery cells in the battery module are connected to the battery cells in other battery modules through the busbar component.

[0045] More battery cells are connected to the battery cells in other battery modules through the busbar component, and the connection performance between the battery modules can be enhanced through the busbar component.

[0046] In a possible implementation, the busbar component connects the battery cells in series along the second direction. This can enable each pair of adjacent battery cells between adjacent battery modules to be connected through the busbar component, thereby enhancing the connection performance between the battery modules.

[0047] In a possible implementation, the battery module is disposed on the bottom wall of the box body; the battery further includes: a second connecting bar disposed on the surface of the battery module away from the bottom wall of the box body, the second connecting bar extends along the second direction and is fixedly connected to a plurality of the battery modules in the box body.

[0048] The second connecting bar can constrain the battery cells in the second direction to increase the structural strength of the battery and resist the expansion force of the battery cells at the same time.

[0049] In a third aspect, an electrical device is provided, including: the battery in the second aspect or any possible implementation of the second aspect, the battery is used to provide electrical energy.

[0050] In a fourth aspect, a method for manufacturing a battery is provided, including: providing a battery module, the battery module includes: N columns of battery cells, each column of battery cells in the N columns of battery cells includes a plurality of battery cells arranged along a first direction, the N columns of battery cells are arranged along a second direction, N is an integer greater than 1, the first direction is perpendicular to the second direction; N - 1 separators, the separators extend along the first direction and are disposed between adjacent two columns of battery cells, the separators are fixedly connected to each battery cell in the two columns of battery cells; wherein, a fixing structure is provided at the end of the separator in the first direction; providing a box body; accommodating the battery module in the box body, wherein, the separator is fixed to the box body through the fixing structure.

[0051] In a fifth aspect, a device for manufacturing a battery is provided, including a module for executing the method in the third aspect.

[0052] In the technical solution of the embodiment of the present application, a partition is provided between two adjacent columns of battery cells in the battery module. The partition is fixedly connected to each battery cell in the two columns of battery cells. A fixing structure is provided at the end of the partition, and the partition is fixed to the box body through the fixing structure. In this way, each battery cell in the battery is fixed to the box body by the partition and the fixing structure, so that each battery cell can transfer its load to the box body. Therefore, the technical solution of the embodiment of the present application can improve the energy density of the battery while ensuring the structural strength of the battery, thereby improving the performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the drawings.

[0054] Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application;

[0055] Figure 2 is a schematic diagram of a battery according to an embodiment of the present application;

[0056] Figure 3 is a schematic diagram of a battery cell according to an embodiment of the present application;

[0057] Figure 4 is a schematic diagram of a battery according to an embodiment of the present application;

[0058] Figure 5 is a schematic diagram of a battery module according to an embodiment of the present application;

[0059] Figure 6 is a schematic diagram of a battery module according to an embodiment of the present application;

[0060] Figure 6a is a schematic diagram of the connection between a battery module and a box body according to an embodiment of the present application;

[0061] Figure 6b is a schematic diagram of the connection between a battery module and a box body according to an embodiment of the present application;

[0062] Figure 7 is a schematic diagram of a battery according to an embodiment of the present application;

[0063] Figure 8 is a schematic diagram of a battery module according to an embodiment of the present application;

[0064] Figure 9 is a schematic diagram of a battery module according to an embodiment of the present application;

[0065] Figure 10 It is a schematic diagram of a battery module according to an embodiment of the present application;

[0066] Figure 11 It is a schematic diagram of a separator according to an embodiment of the present application;

[0067] Figure 12 It is a schematic diagram of an S-shaped separator according to an embodiment of the present application;

[0068] Figure 13 It is a schematic flow chart of a method for manufacturing a battery according to an embodiment of the present application;

[0069] Figure 14 It is a schematic block diagram of a device for manufacturing a battery according to an embodiment of the present application.

[0070] In the drawings, the drawings are not drawn to actual scale. Detailed Embodiments

[0071] The following further describes in detail the embodiments of the present application in conjunction with the drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0072] In the description of the present application, it should be noted that unless otherwise specified, all technical and scientific terms used have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion; the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0073] References to "embodiments" in this application mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0074] All orientation terms used in the following description are the directions shown in the figures and do not limit the specific structure of this application. In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an 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 circumstances.

[0075] The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0076] In this application, the battery cell can include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of this application do not limit this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of this application do not limit this either. Generally, the battery cell is divided into three types according to the packaging method: cylindrical battery cell, square battery cell, and soft-pack battery cell, and the embodiments of this application do not limit this either.

[0077] The battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in this application can include a battery pack, etc. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0078] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the coated positive electrode active material layer protrudes from the current collector with the coated positive electrode active material layer. The current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the coated negative electrode active material layer protrudes from the current collector with the coated negative electrode active material layer. The current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that large currents can pass through without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly can be a wound structure or a stacked structure. The embodiments of the present application are not limited thereto.

[0079] To meet different power demands, the battery can include multiple battery cells. Among them, the multiple battery cells can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means a combination of series and parallel connections. Optionally, the multiple battery cells can first be connected in series, in parallel, or in a hybrid connection to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a hybrid connection to form a battery. That is to say, the multiple battery cells can directly form a battery, or they can first form a battery module, and then the battery module forms a battery. The battery is further arranged in an electrical device to provide electrical energy for the electrical device.

[0080] The development of battery technology needs to consider various design factors simultaneously. For example, energy density, cycle life, discharge capacity, charge-discharge rate, safety, etc. Among them, when the internal space of the battery is fixed, improving the utilization rate of the internal space of the battery is an effective means to improve the energy density of the battery. However, while improving the utilization rate of the internal space of the battery, it may reduce the structural strength of the battery. For example, beams for mounting battery modules are usually arranged inside the battery box, and in addition, side plates and end plates are also arranged on the battery modules in the battery. The above-mentioned beams, side plates, and end plates not only realize the fixation of the battery but also occupy the internal space of the battery. However, if the beams, side plates, and end plates are not arranged, the structural strength of the battery will be insufficient, affecting the performance of the battery.

[0081] In view of this, the embodiments of the present application provide a technical solution. A partition is provided between two adjacent columns of battery cells in a battery module. The partition is fixedly connected to each battery cell in the two columns of battery cells, and then is fixed to a box body through a fixing structure. In this way, each battery cell in the battery is fixed to the box body by the partition and the fixing structure, and can transfer its load to the box body, ensuring the structural strength of the battery. In this case, side plates may not be provided on the outside of the battery module, and structures such as beams do not need to be provided in the middle of the box body, which can greatly improve the space utilization rate inside the battery, thereby improving the energy density of the battery. Therefore, the technical solution of the embodiments of the present application can ensure the structural strength of the battery while improving the energy density of the battery, thereby improving the performance of the battery.

[0082] The technical solutions described in the embodiments of the present application are applicable to various devices using batteries, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, electric vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0083] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applicable to all devices using batteries. However, for the sake of simplicity of description, the following embodiments will be described by taking electric vehicles as an example.

[0084] For example, as Figure 1 shown, 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. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A motor 40, a controller 30, and a battery 10 can be provided inside the vehicle 1. The controller 30 is used to control the power supply of the battery 10 to the motor 40. For example, the battery 10 can be provided at the bottom, the front end, or the rear end of the vehicle 1. The battery 10 can be used for the power supply of the vehicle 1. For example, the battery 10 can be used as the operating power supply of the vehicle 1 for the circuit system of the vehicle 1, such as for the working power requirements during the start-up, navigation, and operation of the vehicle 1. In another embodiment of the present application, the battery 10 can not only be used as the operating power supply of the vehicle 1, but also be used as the driving power supply of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0085] To meet different power usage requirements, the battery 10 can include multiple battery cells. For example, as Figure 2 shown, it is a schematic structural diagram of a battery 10 according to an embodiment of the present application. The battery 10 can include multiple battery cells 20. The battery 10 can also include a box body 11. The inside of the box body 11 is a hollow structure, and multiple battery cells 20 are accommodated in the box body 11. For example, multiple battery cells 20 are placed in the box body 11 after being connected in parallel, in series, or in a mixed connection.

[0086] Optionally, the battery 10 may further include other structures, which will not be elaborated one by one here. For example, the battery 10 may further include a busbar component for realizing electrical connection between multiple battery cells 20, such as parallel connection, series connection, or hybrid connection. Specifically, the busbar component can achieve electrical connection between battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of multiple battery cells 20 can be further led out through a conductive mechanism passing through the box body. Optionally, the conductive mechanism may also belong to the busbar component.

[0087] 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, parallel, or in a hybrid connection to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 forms a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to requirements. The battery may include multiple battery modules, and these battery modules can be connected in series, parallel, or in a hybrid connection.

[0088] As Figure 3 shown, it 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 housing 211, and a cover plate 212. The housing 211 and the cover plate 212 form an outer shell or a battery case 21. The wall of the housing 211 and the cover plate 212 are both referred to as the wall of the battery cell 20. For a cuboid-shaped battery cell 20, the wall of the housing 211 includes a bottom wall and four side walls. The housing 211 is determined according to the shape after combination of one or more electrode assemblies 22. For example, the housing 211 can be a hollow cuboid, cube, or cylinder, and one of the surfaces of the housing 211 has an opening so that one or more electrode assemblies 22 can be placed inside the housing 211. For example, when the housing 211 is a hollow cuboid or cube, one of the planes of the housing 211 is an opening surface, that is, this plane does not have a wall body and makes the inside and outside of the housing 211 communicate. When the housing 211 can be a hollow cylinder, the end face of the housing 211 is an opening surface, that is, this end face does not have a wall body and makes the inside and outside of the housing 211 communicate. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0089] 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 a flat plate shape, and the two electrode terminals 214 are fixed on the flat plate surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is correspondingly provided with a connection member 23, or may also be referred to as a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0090] As Figure 3 shown, each electrode assembly 22 has a first tab 221a and a second tab 222a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. The first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal through a connection member 23, and the second tab 222a of one or more electrode assemblies 22 is connected to the other electrode terminal through another connection member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab through a connection member 23, and the negative electrode terminal 214b is connected to the negative electrode tab through another connection member 23.

[0091] In the battery cell 20, according to actual usage requirements, the electrode assembly 22 can be set to be single or multiple. As Figure 3 shown, there are 4 independent electrode assemblies 22 provided in the battery cell 20.

[0092] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to actuate to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0093] The pressure relief mechanism 213 can be various possible pressure relief structures, and the embodiments of the present application do not limit this. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism, and the temperature-sensitive pressure relief mechanism is configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism, and the pressure-sensitive pressure relief mechanism is configured to be able to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0094] Figure 4 The structural schematic diagram of the battery 10 according to an embodiment of the present application is shown. As Figure 4 shown, the battery 10 includes a battery module 100 and a box body 11. The battery module 100 is accommodated in the box body 11. Figure 5 The structural schematic diagram of the battery module 100 according to an embodiment of the present application is shown. As Figure 5As shown, the battery module 100 may include N columns of battery cells 20 and N - 1 separators 101. N is an integer greater than 1. In the drawings of this application, N is exemplified as 2, that is, the battery module 100 includes two columns of battery cells 20 and one separator 101. However, the embodiments of this application are not limited thereto. For example, the battery module 100 may also include more columns of battery cells 20.

[0095] 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, Figure 5 the x direction in. The N columns of battery cells 20 are arranged along a second direction. For example, Figure 5 the y direction in, and the first direction is perpendicular to the second direction. In other words, the first direction is the direction in which the battery cells 20 in each column of battery cells 20 are arranged, and the second direction is the direction in which the N columns of battery cells 20 are arranged.

[0096] The separator 101 extends along the first direction and is disposed between two adjacent columns of battery cells 20. The separator 101 is fixedly connected to each battery cell 20 in the two columns of battery cells 20. As Figure 5 shown, two adjacent columns of battery cells 20 can be respectively fixed on both sides of the separator 101. That is to say, each battery cell 20 in two adjacent columns of battery cells 20 can be fixedly connected through one separator 101. For example, as Figure 5 shown in, the separator 101 is vertically disposed, that is, the separator 101 is perpendicular to the second direction and is disposed between two columns of battery cells 20.

[0097] In the embodiments of this application, the battery module 100 includes N columns of battery cells 20 and N - 1 separators 101, and the N - 1 separators 101 are disposed between the N columns of battery cells 20. That is to say, the separators 101 are disposed inside the battery module 100, and no separators 101 are disposed outside the battery module 100. For example, one separator 101 is disposed between two columns of battery cells 20, and two separators 101 are disposed between three columns of battery cells 20, and so on. Through such a setting, each battery cell 20 in the battery module 100 can be fixedly connected by using fewer separators 101.

[0098] The separator 101 is provided with a fixing structure 102 at the end in the first direction, and the separator 101 is fixed to the box body 11 through the fixing structure 102. As Figure 5 shown, the fixing structure 102 is disposed at both ends of the separator 101 in the x direction. The separator 101 is fixed to the box body 11 through the fixing structure 102, thereby realizing the fixing of the battery module 100 to the box body 11. As described above, each battery cell 20 in the battery module 100 is fixedly connected by the separator 101, and through the fixing structure 102, the fixing connection of each battery cell 20 to the box body 11 can be realized.

[0099] In the embodiment of the present application, a partition 101 is arranged between two adjacent columns of battery cells 20 of the battery module 100. The partition 101 is fixedly connected to each battery cell 20 in the two columns of battery cells 20. A fixing structure 102 is arranged at the end of the partition 101. The partition 101 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 partition 101 and the fixing structure 102. Therefore, each battery cell 20 can transfer its load to the box body 11, ensuring the structural strength of the battery 10. In this case, side plates may not be arranged on the outside of the battery module 100, and structures such as beams do not need to be arranged in the middle of the box body 11 either. The space utilization rate inside the battery 10 can be maximally improved, thereby improving the energy density of the battery 10. Therefore, the technical solution of the embodiment of the present application can ensure the structural strength of the battery 10 while improving the energy density of the battery 10, thereby improving the performance of the battery 10.

[0100] Optionally, the partition 101 and each battery cell 20 in the two adjacent columns of battery cells 20 can be fixedly connected by an adhesive method. For example, in an embodiment of the present application, as Figure 6 shown, the partition 101 and each battery cell 20 in the two adjacent columns of battery cells 20 can be bonded by a structural adhesive 110, but the embodiment of the present application is not limited thereto.

[0101] Optionally, adjacent battery cells 20 in each column of the N columns of battery cells 20 can also be bonded. For example, as Figure 6 shown, they are bonded by a structural adhesive 110, but the embodiment of the present application is not limited thereto. By fixing the adjacent battery cells 20 in each column of battery cells 20, the fixing effect of the battery cells 20 can be further enhanced.

[0102] Optionally, the partition 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. The material of the partition 101 can also be a composite material. For example, other materials are coated on the surface of the metal plate. The embodiment of the present application is not limited thereto.

[0103] Optionally, the thickness of the partition 101 can be 0.1 - 0.5 mm. For example, in an embodiment of the present application, the thickness of the partition 101 can be 0.2 - 0.4 mm. Using the partition 101 with this thickness can reduce the space occupied by the partition 101 while ensuring the strength.

[0104] Optionally, in an embodiment of the present application, the battery 10 includes a plurality of battery modules 100 arranged in the second direction, and there is a gap between adjacent battery modules 100. That is, the plurality of battery modules 100 are arranged in the y direction, and there is no partition 101 between adjacent battery modules 100, but there is a certain gap. That is to say, within one battery module 100, a partition 101 is provided between two columns of battery cells 20, but no partition 101 is provided between adjacent battery modules 100. In this way, on the one hand, the number of partitions 101 inside the battery 10 can be minimized as much as possible, and on the other hand, a certain gap can be formed between adjacent battery modules 100 to provide expansion space for the battery cells 20.

[0105] Optionally, in an embodiment of the present application, the battery module 100 includes two columns of battery cells 20, that is, N is 2. Correspondingly, one partition 101 is provided between the two columns of battery cells 20. As described above, no partition 101 is provided between adjacent battery modules 100. In this way, fewer partitions 101 can be provided in the battery 10 in this embodiment, but at the same time, it can be ensured that each battery cell 20 can be fixed to the partition 101 and connected to the box body 11 through the partition 101 and the fixing structure 102.

[0106] Optionally, in an embodiment of the present application, for a battery module 100 including N columns of battery cells 20, N / 2 partitions 101 can be provided, where each partition 101 is provided between adjacent two columns of battery cells 20, and each column of battery cells 20 is fixedly connected to one partition 101. For example, for a battery module 100 including four columns of battery cells 20, two partitions 101 can be provided, where one partition 101 is provided between the first column and the second column of battery cells 20, and the other partition 101 is provided between the third column and the fourth column of battery cells 20; for a battery module 100 including six columns of battery cells 20, three partitions 101 can be provided, where the first partition 101 is provided between the first column and the second column of battery cells 20, the second partition 101 is provided between the third column and the fourth column of battery cells 20, and the third partition 101 is provided between the fifth column and the sixth column of battery cells 20; and so on. Such a setting can ensure that each battery cell 20 can be fixed to the partition 101 and connected to the box body 11 through the partition 101 and the fixing structure 102.

[0107] Optionally, in an embodiment of the present application, the fixing structure 102 may include a fixing plate 104. The fixing plate 104 is fixedly connected to the end of the partition plate 101 and is also fixedly connected to the battery cell 20 located at the end of the partition plate 101. For example, for a cuboid-shaped battery cell 20, the fixing plate 104 may be vertically connected to the partition plate 101 and is respectively connected to two adjacent side walls of the cuboid-shaped battery cell 20 by the partition plate 101, thereby further enhancing the fixing effect on the battery cell 20.

[0108] Optionally, the fixing plate 104 may be made of the same material as the partition plate 101, such as metal, plastic, or composite material. The thickness of the fixing plate 104 may also be the same as that of the partition plate 101. The material or thickness of the fixing plate 104 may also be different from that of the partition plate 101. For example, the fixing plate 104 may be provided with a higher strength or thickness, but the embodiments of the present application are not limited thereto.

[0109] Optionally, the connection manner between the partition plate 101 and the fixing plate 104 may be resistance welding, resistance riveting, SPR riveting, locking bolts, or snap connection, etc.; the fixing plate 104 may also be fixed to the box body by resistance welding, resistance riveting, SPR riveting, locking bolts, or snap connection, etc., but the embodiments of the present application are not limited thereto.

[0110] Optionally, the fixing plate 104 and the battery cell 20 may be fixedly connected by an adhesive bonding method, such as bonding with a structural adhesive, but the embodiments of the present application are not limited thereto.

[0111] Optionally, in an embodiment of the present application, the fixing plate 104 includes a first connecting portion 105 extending away from the battery module 100 in a first direction, and the first connecting portion 105 is used to connect the wall of the box body 11.

[0112] Optionally, as Figure 6a shown, the first connecting portion 105 may be connected to the bottom wall 111 of the box body 11. In this case, at a position where the fixing plate 104 is close to the bottom wall 111, the first connecting portion 105 may extend away from the battery module 100, that is, extend outward to form the first connecting portion 105, and the bottom wall 111 of the box body 11 is connected through the first connecting portion 105.

[0113] Optionally, as Figure 6bAs shown, the first connecting portion 105 can also be connected to the side wall 112 of the box body 11. In this case, at the position of the fixing plate 104 corresponding to the side wall 112, the first connecting portion 105 can extend outward in a direction away from the battery module 100, that is, outward, and the side wall 112 of the box body 11 is connected through the first connecting portion 105. Optionally, the lower end of the fixing plate 104 can be higher than the bottom wall 111, as long as it corresponds to the connection position of the side wall 112. Of course, the lower end of the fixing plate 104 can also extend to the bottom wall 111, and the present application does not limit this.

[0114] The first connecting portion 105 can be parallel to the wall of the connected box body 11. For example, the first connecting portion 105 is parallel to the bottom wall of the box body 11. The area of the first connecting portion 105 can be set according to the fixing method with the wall of the connected box body 11 to meet the required fixing effect.

[0115] Optionally, in an embodiment of the present application, the first connecting portion 105 can be formed by bending the fixing plate 104. For example, the first connecting portion 105 can be formed by bending the edge of the fixing plate 104 close to the connected wall in a direction away from the battery module 100. Taking the connection to the bottom wall of the box body 11 as an example, the lower edge of the fixing plate 104 can be bent outward to form the first connecting portion 105. In this way, the first connecting portion 105 and the main body of the fixing plate 104 are an integral structure, thereby enhancing the connection performance.

[0116] By connecting the wall of the box body 11 through the first connecting portion 105, the fixed connection between the fixing plate 104 and the wall of the box body 11 can be realized, so that the load of the battery cell 20 can be transmitted to the wall of the box body 11, thereby ensuring the structural strength of the battery 10.

[0117] Optionally, in an embodiment of the present application, the battery 10 may further include: a first connecting bar 13, the first connecting bar 13 extending in the second direction and used for connecting a plurality of battery modules 100 in the box body 11. The first connecting bar 13 connecting a plurality of battery modules 100 in the second direction can improve the overall structural strength of the plurality of battery modules 100.

[0118] In this case, the fixing plate 104 further includes a second connecting portion 106 extending in a direction away from the battery module 100 along the first direction, and the second connecting portion 106 is used to connect the first connecting bar 13. Optionally, the second connecting portion 106 and the first connecting portion 105 can be respectively arranged at two ends of the fixing plate 104. For example, when the first connecting portion 105 is connected to the bottom wall of the box body 11, the second connecting portion 106 can be arranged at a position of the fixing plate 104 away from the bottom wall. That is, at a position of the fixing plate 104 away from the bottom wall, a second connecting portion 106 can be formed by extending outward in a direction away from the battery module 100, i.e., outward, and the first connecting bar 13 is connected through the second connecting portion 106. In this way, the structural strength of the battery 10 can be further ensured by the first connecting bar 13 at a position away from the bottom wall.

[0119] The second connecting portion 106 can be parallel to the first connecting bar 13. The area of the second connecting portion 106 can be set according to the fixing manner with the first connecting bar 13 to meet the required fixing effect.

[0120] Optionally, in an embodiment of the present application, the second connecting portion 106 can be formed by bending the fixing plate 104. For example, the second connecting portion 106 can be formed by bending the edge of the fixing plate 104 close to the first connecting bar 13 in a direction away from the battery module 100. For example, the upper edge of the fixing plate 104 can be bent outward to form the second connecting portion 106. In this way, the second connecting portion 106 and the main body of the fixing plate 104 are of an integral structure, thereby enhancing the connection performance.

[0121] Optionally, in an embodiment of the present application, the fixing plate 104 further includes a third connecting portion 107 extending in a direction away from the battery module 100 along the first direction, and the third connecting portion 107 is used to connect the fixing plate 104 and the partition plate 101. For example, at the position where the fixing plate 104 is connected to the partition plate 101, a third connecting portion 107 can be formed by extending outward in a direction away from the battery module 100, i.e., outward, and the fixing plate 104 is fixedly connected to the partition plate 101 through the third connecting portion 107.

[0122] Optionally, in addition to connecting the partition plate 101, the third connecting portion 107 can also realize the connection between the fixing plates 104 at the same time. For example, one fixing plate 104 is provided for each column of battery cells 20 in the battery module 100, and the partition plate 101 in the battery module 100 and the two fixing plates 104 corresponding to two columns of battery cells 20 are fixed together through the third connecting portion 107.

[0123] The third connecting portion 107 can be parallel to the partition plate 101. The area of the third connecting portion 107 can be set according to the fixing manner to meet the required fixing effect.

[0124] Optionally, in an embodiment of the present application, the third connecting portion 107 may be formed by bending the fixing plate 104. For example, the third connecting portion 107 may be formed by bending the edge of the fixing plate 104 close to the partition 101 in a direction away from the battery module 100. In this way, the third connecting portion 107 and the main body of the fixing plate 104 are of an integral structure, thereby enhancing the connection performance.

[0125] Optionally, in an embodiment of the present application, the partition 101 may be integrally formed with the fixing plates 104 at both ends of one column of battery cells 20 among two adjacent columns of battery cells 20, so that only the fixing plates 104 need to be provided for the other column of battery cells 20; alternatively, the partition 101 may be integrally formed with the corresponding fixing plates 104 of two adjacent columns of battery cells 20.

[0126] Optionally, in an embodiment of the present application, the fixing plates 104 corresponding to multiple battery modules 100 may be of an integral structure. As Figure 7 shown, the fixing plates 104 corresponding to multiple battery modules 100 may be a single whole plate, and multiple battery modules 100 are fixed to the box body 11 through this single whole plate, thereby improving the overall structural strength of multiple battery modules 100. Optionally, limit strips 108 corresponding to the battery modules 100 may be provided on the fixing plate 104, and the limit strips 108 are used to be inserted into the gaps between adjacent battery modules 100, so as to facilitate the installation of the battery modules 100.

[0127] Optionally, in an embodiment of the present application, as Figure 8 shown, the end portion of the partition 101 protrudes from the N columns of battery cells 20 in the first direction, and the fixing structure 102 includes a first protruding portion 121 where the end portion of the partition 101 protrudes from the N columns of battery cells 20 in the first direction. The partition 101 may be connected to the wall of the box body 11 through the first protruding portion 121. For example, a connecting portion corresponding to the first protruding portion 121 may be provided on the wall of the box body 11 to achieve the connection between the two.

[0128] Optionally, in an embodiment of the present application, as Figure 9 shown, the fixing structure 102 further includes a first extension portion 123, the first extension portion 123 is fixedly connected to the first protruding portion 121 and extends in the second direction, and the first extension portion 123 is used to connect the wall of the box body 11. For example, taking the connection with the bottom wall of the box body 11 as an example, at a position where the first protruding portion 121 is close to the bottom wall, the first extension portion 123 is fixedly connected to the first protruding portion 121 and extends in the second direction to form a connection area with the bottom wall, so as to connect the bottom wall of the box body 11. Of course, similar to the foregoing embodiments, the first extension portion 123 of the fixing structure 102 may also be connected to the side wall of the box body 11, and the present application is not limited thereto.

[0129] The first extension portion 123 can be parallel to the wall of the connected box body 11. For example, the first extension portion 123 is parallel to the bottom wall of the box body 11. The area of the first extension portion 123 can be set according to the fixing method with the wall of the connected box body 11 to meet the required fixing effect.

[0130] Optionally, the first extension portion 123 and the first protruding portion 121 can be integrally formed, which can enhance the connection performance.

[0131] Optionally, in an embodiment of the present application, when the first connection bar 13 is provided on the battery 10, the fixing structure 102 further includes a second extension portion 124. The second extension portion 124 is fixedly connected to the first protruding portion 121 and extends along the second direction. The second extension portion 124 is used to connect the first connection bar 13. For example, when the first extension portion 123 is connected to the bottom wall of the box body 11, the second extension portion 124 can be provided at a position of the first protruding portion 121 away from the bottom wall. That is, at a position of the first protruding portion 121 away from the bottom wall, the second extension portion 124 is fixedly connected to the first protruding portion 121 and extends along the second direction to form a region connected to the first connection bar 13, thereby connecting the first connection bar 13. This can further ensure the structural strength of the battery 10 through the first connection bar 13 at a position away from the bottom wall.

[0132] The second extension portion 124 can be parallel to the first connection bar 13. The area of the second extension portion 124 can be set according to the fixing method with the first connection bar 13 to meet the required fixing effect.

[0133] Optionally, the second extension portion 124 and the first protruding portion 121 can be integrally formed, which can enhance the connection performance.

[0134] Optionally, in an embodiment of the present application, as Figure 10 shown, the battery module 100 can further include: an attachment plate 109. The attachment plate 109 extends along the first direction and is fixedly connected to the partition 101. The attachment plate 109 protrudes from the partition 101 along the second direction and is attached to each battery cell 20 in two adjacent columns of battery cells 20. For example, the attachment plate 109 can be vertically connected to the partition 101, so that the partition 101 is connected to the side wall of the battery cell 20, and the attachment plate 109 is connected to the bottom wall and / or the top wall of the battery cell 20, thereby further enhancing the fixing effect on the battery cell 20.

[0135] Optionally, the attachment plate 109 can be made of the same material as the partition 101, such as metal, plastic or composite material. The thickness of the attachment plate 109 can also be the same as that of the partition 101. The material or thickness of the attachment plate 109 can also be different from that of the partition 101, and the embodiments of the present application do not limit this.

[0136] Optionally, the attachment plate 109 may be fixedly connected to each of the two adjacent columns of battery cells 20. In this way, each battery cell 20 is fixed by the attachment plate 109 and the partition plate 101, thereby further improving the fixing effect.

[0137] Optionally, the attachment plate 109 and the battery cell 20 may be fixedly connected by bonding. For example, they may be bonded by structural adhesive, but the embodiments of the present application are not limited thereto.

[0138] Optionally, in an embodiment of the present application, the attachment plate 109 protrudes from the N columns of battery cells 20 in the first direction, and the fixing structure 102 includes a second protruding portion 122 where the attachment plate 109 protrudes from the N columns of battery cells 20 in the first direction. The second protruding portion 122 can be used to connect to the wall of the box body 11. For example, it can be connected to the bottom wall of the box body 11, so that the load of the battery cell 20 can be transmitted to the wall of the box body 11, thereby ensuring the structural strength of the battery 10. Of course, the second protruding portion 122 of the attachment plate 109 can also be connected to the side wall of the box body 11, and the present application is not limited thereto.

[0139] The area of the second protruding portion 122 can be set according to the fixing method with the wall of the box body 11 to be connected to meet the required fixing effect.

[0140] Optionally, in an embodiment of the present application, the cross-sectional shape of the partition plate 101 and the attachment plate 109 in a direction perpendicular to the first direction may be an inverted T shape, an I shape, a Z shape, an S shape, a T shape, a C shape, an L shape, etc.

[0141] Specifically, when the cross-sectional shape of the partition plate 101 and the attachment plate 109 in a direction perpendicular to the first direction is an inverted T shape or an L shape, the second protruding portion 122 can be used to connect to the bottom wall of the box body 11; when it is an I shape, a Z shape, an S shape or a C shape, the second protruding portion 122 can be used to connect to the bottom wall of the box body 11 and the first connecting strip 13; when it is a T shape, the second protruding portion 122 can be used to connect to the top wall of the box body 11 and / or the first connecting strip 13.

[0142] Optionally, in an embodiment of the present application, the partition plate 101 and the attachment plate 109 may be integrally formed, which can improve the connection performance between the partition plate 101 and the attachment plate 109. The partition plate 101 and the attachment plate 109 may also be connected by various fixing methods, and the embodiments of the present application are not limited thereto.

[0143] Optionally, in an embodiment of the present application, the battery cell 20 is a cuboid-shaped battery cell 20. The cuboid-shaped battery cell 20 includes two opposite first side walls and two opposite second side walls. The area of the first side wall is larger than that of the second side wall, that is, the first side wall is a wide-side wall and the second side wall is a narrow-side wall. In this case, the separator 101 is fixedly connected to the first side wall, that is, the wide-side wall. That is to say, in this embodiment, the narrow-side walls of each column of battery cells 20 are connected, and thus they are arranged in a column along the first direction; the separator 101 is fixedly connected to the wide-side wall of each battery cell 20. In this way, the separator 101 can more easily receive the load of the battery cell 20, thereby facilitating the transfer of the load of the battery cell 20 to the box body.

[0144] Optionally, in an embodiment of the present application, as Figure 11 shown, the separator 101 may have an opening 125 corresponding to the first side wall. The area of the opening 125 is smaller than that of the first side wall, so that the border of each opening 125 can be fixedly connected to the first side wall of the battery cell 20. The opening 125 may be square or circular, and the embodiments of the present application do not limit this. By providing the opening 125 on the separator 101, the material used for the separator 101 can be reduced, thereby reducing the weight of the separator 101.

[0145] Optionally, in an embodiment of the present application, as Figure 12 shown, the battery cell 20 may also be a cylindrical battery cell 20. In this case, the separator 101 may be an S-shaped separator 101 adapted to the side surface of the cylindrical battery cell 20, so as to better connect each battery cell 20.

[0146] It should be understood that for Figure 12 , the corresponding fixing structure 102 may adopt the settings in the foregoing embodiments. For the sake of brevity, it will not be described herein again.

[0147] Optionally, in an embodiment of the present application, the separator 101 or the attachment plate 109 may be a heat insulation plate. For example, the material of the separator 101 or the attachment plate 109 may be a heat insulation material, or the surface of the separator 101 or the attachment plate 109 may be sprayed with a heat insulation material, so as to achieve heat insulation between the battery cells 20 while fixing the battery cells 20.

[0148] Optionally, in an embodiment of the present application, the separator 101 or the attachment plate 109 may be a cooling plate or a heating plate. For example, a cooling flow channel or a heating resistance wire may be provided in the separator 101 or the attachment plate 109, so as to achieve cooling or heating of the battery cells 20 while fixing the battery cells 20.

[0149] Optionally, in an embodiment of the present application, the partition 101 may be integrally formed with the box body 11. For example, the partition 101 may be extruded from the profile of the box body 11. This can improve the connection performance between the partition 101 and the box body 11.

[0150] Optionally, in an embodiment of the present application, the battery 10 further includes: a bus bar component 12. The bus bar component 12 is used for electrically connecting with the battery cells 20. Among them, at least three battery cells 20 in the battery module 100 are connected to the battery cells 20 in other battery modules 100 through the bus bar component 12. Connecting more battery cells 20 to the battery cells 20 in other battery modules 100 through the bus bar component 12 can enhance the connection performance between the battery modules 100 through the bus bar component 12.

[0151] Optionally, the bus bar component 12 may connect the battery cells 20 in series along the second direction. When the battery cells 20 in each column in the battery module 100 are arranged along the first direction, connecting the battery cells 20 in series along the second direction by the bus bar component 12 can enable each pair of adjacent battery cells 20 between adjacent battery modules 100 to be connected through the bus bar component 12, thereby enhancing the connection performance between the battery modules 100.

[0152] Optionally, in an embodiment of the present application, the battery 10 may further include: a second connecting bar 14. When the battery module 100 is disposed on the bottom wall of the box body 11, the second connecting bar 14 is disposed on the surface of the battery module 100 away from the bottom wall of the box body 11. The second connecting bar 14 extends along the second direction and is fixedly connected to a plurality of battery modules 100 in the box body 11. That is to say, the second connecting bar 14 is disposed on the upper surface of the battery module 100, which can constrain the battery cells 20 in the second direction to increase the structural strength of the battery 10 and resist the expansion force of the battery cells 20 at the same time.

[0153] It should be understood that the relevant parts in the embodiments of the present application can be referred to each other, and will not be repeated here for the sake of brevity.

[0154] An embodiment of the present application further provides an electrical device, which may include the battery 10 in the foregoing embodiment. Optionally, the electrical device may be a vehicle 1, a ship, a spacecraft, etc., but the embodiments of the present application are not limited thereto.

[0155] The battery module 100, the battery 10, and the electrical device in the embodiments of the present application are described above. Next, the method and device for preparing the battery in the embodiments of the present application will be described, and the parts not described in detail can be referred to the foregoing embodiments.

[0156] Figure 13 A schematic flowchart of a method 300 for preparing a battery according to an embodiment of the present application is shown. As Figure 13 shown, the method 300 may include:

[0157] 310. Provide a battery module 100, the battery module 100 including: N columns of battery cells 20, each column of battery cells 20 in the N columns of battery cells 20 including a plurality of battery cells 20 arranged along a first direction, the N columns of battery cells 20 being arranged along a second direction, N being an integer greater than 1, the first direction being perpendicular to the second direction; N - 1 partitions 101, the partitions 101 extending along the first direction and being disposed between adjacent two columns of battery cells 20, the partitions 101 being fixedly connected to each battery cell 20 in the two columns of battery cells 20; wherein, the partitions 101 are provided with fixing structures 102 at the ends in the first direction.

[0158] 320. Provide a box body 11.

[0159] 330. Accommodate the battery module 100 in the box body 11, wherein, the partitions 101 are fixed to the box body 11 through the fixing structures 102.

[0160] Figure 14 The schematic block diagram of an apparatus 400 for manufacturing a battery according to an embodiment of the present application is shown. As Figure 14 shown, the apparatus 400 for manufacturing a battery may include: a providing module 410 and an installing module 420.

[0161] The providing module 410 is configured to provide the battery module 100 and the box body 11, the battery module 100 including: N columns of battery cells 20, each column of battery cells 20 in the N columns of battery cells 20 including a plurality of battery cells 20 arranged along a first direction, the N columns of battery cells 20 being arranged along a second direction, N being an integer greater than 1, the first direction being perpendicular to the second direction; N - 1 partitions 101, the partitions 101 extending along the first direction and being disposed between adjacent two columns of battery cells 20, the partitions 101 being fixedly connected to each battery cell 20 in the two columns of battery cells 20; wherein, the partitions 101 are provided with fixing structures 102 at the ends in the first direction.

[0162] The installing module 420 is configured to accommodate the battery module 100 in the box body 11, wherein, the partitions 101 are fixed to the box body 11 through the fixing structures 102.

[0163] Although the present application has been described with reference to the preferred embodiments, various improvements can be made thereto and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features 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

1. A battery module (100), characterized in that, Comprising: N columns 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 in a first direction, the N columns of battery cells (20) are arranged in a second direction, the battery cells (20) have electrode terminals, and the electrode terminals of the plurality of battery cells (20) are used to be electrically connected through a bus bar component (12), N is an integer greater than 1, and the first direction is perpendicular to the second direction; N - 1 partitions (101), the partitions (101) extend along the first direction and are arranged between adjacent two columns of battery cells (20), and the partitions (101) are fixedly connected to each battery cell (20) in the two columns of battery cells (20); Wherein, a fixing structure (102) is provided at an end of the partition (101) in the first direction, and the fixing structure (102) is used to fix the partition (101) to a box body (11), wherein the box body (11) is used to accommodate the battery module (100); The fixing structure (102) includes a second connecting portion (106) extending in a direction away from the battery module (100) along the first direction, and the second connecting portion (106) is used to be connected to a plurality of the battery modules (100) in the box body (11) through a first connecting bar (13).

2. The battery module according to claim 1, wherein, The fixing structure (102) has a fixing plate (104), the fixing plate (104) is fixedly connected to the end of the partition (101), and is fixedly connected to the battery cell (20) located at the end of the partition (101).

3. The battery module according to claim 2, characterized in that, The fixing plate (104) includes a first connecting portion (105) extending in a direction away from the battery module (100) along the first direction, and the first connecting portion (105) is used to connect to the wall of the box body (11).

4. The battery module according to claim 3, characterized in that The fixing plate (104) further includes a third connecting portion (107) extending in a direction away from the battery module (100) along the first direction, and the third connecting portion (107) is used to connect the fixing plate (104) and the partition (101).

5. The battery module according to claim 1, wherein The end of the partition (101) protrudes from the N columns of battery cells (20) in the first direction, and the fixing structure (102) includes a first protruding portion (121) where the end of the partition (101) protrudes from the N columns of battery cells (20) in the first direction.

6. The battery module according to claim 5, characterized in that, The fixing structure (102) further includes a first extending portion (123), the first extending portion (123) is fixedly connected to the first protruding portion (121) and extends along the second direction, and the first extending portion (123) is used to connect to the wall of the box body (11).

7. The battery module according to claim 6, characterized in that The fixing structure (102) further includes a second extension portion (124) fixedly connected to the first protruding portion (121) and extending along the second direction, and the second extension portion (124) is used to connect a first connection bar (13), wherein the first connection bar (13) is used to connect a plurality of the battery modules (100) within the box body (11).

8. The battery module according to claim 1, wherein The battery module (100) further includes: An attachment plate (109) extending along the first direction and fixedly connected to the partition plate (101), the attachment plate (109) protruding from the partition plate (101) along the second direction and attached to each battery cell (20) in two adjacent columns of battery cells (20).

9. The battery module according to claim 8, characterized in that, The attachment plate (109) is fixedly connected to each battery cell (20) in two adjacent columns of battery cells (20).

10. The battery module according to claim 8 or 9, characterized in that, The attachment plate (109) protrudes from the N columns of battery cells (20) in the first direction, and the fixing structure (102) includes a second protruding portion (122) where the attachment plate (109) protrudes from the N columns of battery cells (20) in the first direction.

11. The battery module according to claim 8 or 9, characterized in that, The partition plate (101) and the attachment plate (109) are integrally formed.

12. The battery module according to any one of claims 1 to 9, characterized in that, N is 2.

13. The battery module according to any one of claims 1 to 9, characterized in that, The battery cell (20) is a cuboid battery cell (20), the cuboid battery cell (20) includes two opposite first side walls and two opposite second side walls, the area of the first side wall is larger than the area of the second side wall, and the partition plate (101) is fixedly connected to the first side wall.

14. The battery module according to claim 13, wherein, The partition plate (101) has an opening (125) corresponding to the first side wall, and the area of the opening (125) is smaller than the area of the first side wall.

15. The battery module according to any one of claims 1 to 9, characterized in that, The battery cell (20) is a cylindrical battery cell (20), and the partition plate (101) is an S-shaped partition plate (101) adapted to the side surface of the cylindrical battery cell (20).

16. The battery module according to any one of claims 1 to 9, characterized in that, The partition plate (101) is a heat insulation plate, a cooling plate or a heating plate.

17. A battery, characterized in that, including: The battery module (100) according to any one of claims 1 to 16; and A box body (11) accommodating the battery module (100).

18. The battery according to claim 17, characterized in that, The battery includes a plurality of the battery modules (100), the plurality of battery modules (100) are arranged along the second direction, and there is a gap between adjacent battery modules (100).

19. The battery according to claim 17, characterized in that, The partition plate (101) and the box body (11) are integrally formed.

20. The battery according to claim 17, wherein The battery further includes: A busbar component (12) electrically connected to the battery cell (20); wherein at least three battery cells (20) in the battery module (100) are connected to battery cells (20) in other battery modules (100) through the busbar component (12).

21. The battery according to claim 20, characterized in that, The busbar component (12) connects the battery cells (20) in series along the second direction.

22. The battery according to any one of claims 17 to 21, characterized in that, The battery module (100) is disposed on the bottom wall of the box body (11); The battery further includes: A second connecting bar (14) is provided on the surface of the battery module (100) away from the bottom wall of the box body (11). The second connecting bar (14) extends along the second direction and is fixedly connected to a plurality of the battery modules (100) in the box body (11).

23. An electrical device, characterized in that, Comprising: The battery (10) according to any one of claims 17 to 22, wherein the battery (10) is used to provide electrical energy.

24. A method for preparing a battery, characterized in that, Comprising: Providing a busbar component (12) and a plurality of battery modules (100), the battery module (100) comprising: N columns of battery cells (20), each column of battery cells (20) in the N columns of battery cells (20) comprising a plurality of battery cells (20) arranged in a first direction. The N columns of battery cells (20) are arranged in a second direction. The battery cells (20) have electrode terminals, and the electrode terminals of the plurality of battery cells (20) are electrically connected through the busbar component (12). N is an integer greater than 1, and the first direction is perpendicular to the second direction; N - 1 separators (101), the separators (101) extending along the first direction and disposed between adjacent two columns of battery cells (20), and the separators (101) being fixedly connected to each battery cell (20) in the two columns of battery cells (20); Wherein, a fixing structure (102) is provided at an end of the separator (101) in the first direction, and the fixing structure (102) includes a second connecting portion (106) extending in a direction away from the battery module (100) along the first direction; Providing a box body (11) and a first connecting bar (13); Accommodating the battery module (100) in the box body (11), wherein the separator (101) is fixed to the box body (11) through the fixing structure (102), and the second connecting portion (106) is connected to a plurality of the battery modules (100) in the box body (11) through the first connecting bar (13).

25. An apparatus for preparing a battery, characterized in that, Comprising: Providing a module (410) for providing a box body (11) and a plurality of battery modules (100), the battery module (100) comprising: N columns of battery cells (20), each column of battery cells (20) in the N columns of battery cells (20) comprising a plurality of battery cells (20) arranged in a first direction. The N columns of battery cells (20) are arranged in a second direction. The battery cells (20) have electrode terminals, and the electrode terminals of the plurality of battery cells (20) are for being electrically connected through the busbar component (12). N is an integer greater than 1, and the first direction is perpendicular to the second direction; N - 1 separators (101), the separators (101) extending along the first direction and disposed between adjacent two columns of battery cells (20), and the separators (101) being fixedly connected to each battery cell (20) in the two columns of battery cells (20); Wherein, a fixing structure (102) is provided at an end of the partition plate (101) in the first direction, the fixing structure (102) includes a second connecting portion (106) extending in a direction away from the battery module (100) along the first direction, and the second connecting portion (106) is connected to a plurality of the battery modules (100) through a first connecting bar (13); and, An installation module (420) is configured to accommodate the battery module (100) in the box body (11), wherein the partition plate (101) is fixed to the box body (11) through the fixing structure (102).

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