Battery device and electrical device

Abstract

The present application belongs to the technical field of batteries. Disclosed are a battery device and an electrical device. The battery device comprises a case body component, two limiting members and a plurality of battery cells, the two limiting members being spaced in a first direction, and the limiting members being connected to the case body component. The plurality of battery cells are arranged in the first direction and arranged between the two limiting members. The plurality of battery cells comprise a first end battery cell which is located at one end in the first direction, the first end battery cell comprising a first casing and a first end cover, the first casing being provided with a first opening, the first end cover covering the first opening and being connected to the first casing to form a first connection portion, and, in the first direction, the projection of the first connection portion at least partially overlapping a limiting member. The battery device has high reliability.

Description

Battery devices and electrical appliances Cross-reference to related applications

[0001] This application claims priority to Chinese patent application 202411204657.X, filed on August 29, 2024, entitled “Battery Device and Power Consumption Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0004] Improving the reliability of battery devices is a pressing issue in battery technology. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0006] In a first aspect, this application provides a battery device, which includes a housing component, two limiting members, and a plurality of battery cells. The two limiting members are spaced apart along a first direction and connected to the housing component. The plurality of battery cells are arranged along the first direction and disposed between the two limiting members. The plurality of battery cells includes a first end battery cell located at one end along the first direction. The first end battery cell includes a first housing and a first end cap. The first housing has a first opening, and the first end cap covers the first opening and is connected to the first housing to form a first connecting portion. Along the first direction, the projection of the first connecting portion at least partially overlaps with the limiting members.

[0007] In the technical solution of this application embodiment, since the limiting member is connected to the housing component, and the projection of the first connecting portion overlaps with the limiting member at least partially along the first direction, the limiting member has a strong ability to suppress the deformation of the side of the first end battery cell near the housing component when the first end battery cell expands and deforms. This reduces the risk of leakage of the first end battery cell due to failure of the first connecting portion, thus giving the first end battery cell higher structural stability. Furthermore, this arrangement helps improve the reliability of the battery device.

[0008] In one or more embodiments of the first aspect, each limiting member includes a first end and a second end disposed opposite to each other along a second direction, the first end being connected to the housing component, and the second direction intersecting the first direction. Along the second direction, a first connecting portion is located at the end of the first end battery cell near the housing component.

[0009] In the above solution, the end of the limiting member along the second direction near the housing component has a stronger ability to suppress the deformation of the first end battery cell. Setting the first connection part at the end of the first end battery cell near the housing component can further reduce the risk of leakage of the first end battery cell due to failure of the first connection part.

[0010] In one or more embodiments of the first aspect, the plurality of battery cells include a second end battery cell located at the other end along a first direction. The second end battery cell includes a second housing and a second end cap. The second housing has a second opening. The second end cap covers the second opening and is connected to the second housing to form a second connection portion. Along the first direction, the projection of the second connection portion at least partially overlaps with the limiting member.

[0011] In the above solution, since the limiting member is connected to the housing component, and the projection of the second connecting portion overlaps with the limiting member at least partially along the first direction, the limiting member has a strong ability to suppress the deformation of the side of the second end battery cell near the housing component when the second end battery cell expands and deforms. This reduces the risk of leakage of the second end battery cell due to failure of the second connecting portion, thus giving the second end battery cell higher structural stability. Furthermore, this arrangement helps improve the reliability of the battery device.

[0012] In one or more embodiments of the first aspect, each limiting member includes a first end and a second end disposed opposite to each other along a second direction, the first end being connected to the housing component, and the second direction intersecting the first direction. Along the second direction, a second connecting portion is located at the end of the second end battery cell near the housing component.

[0013] In the above solution, the end of the limiting member along the second direction near the housing component has a stronger ability to suppress the deformation of the second end battery cell. Setting the second connection part at the end of the second end battery cell near the housing component can further reduce the risk of leakage of the second end battery cell due to failure of the second connection part.

[0014] In one or more embodiments of the first aspect, the battery device further includes a thermal management component located between a battery cell and a housing component along a second direction, the thermal management component being used to regulate the temperature of the battery cell, the second direction intersecting the first direction.

[0015] In the above scheme, the thermal management component is located between the battery cell and the housing component, which helps to shorten the heat exchange path between the thermal management component and the battery cell, improve the heat exchange effect of the thermal management component, and thus improve the reliability of the battery cell.

[0016] In one or more embodiments of the first aspect, the battery cell includes a positive terminal and a negative terminal. Along the second direction, the positive terminal and the negative terminal are disposed at one end of the battery cell near the housing component. The positive terminal and the negative terminal are spaced apart along the third direction. The thermal management component is located between the positive terminal and the negative terminal. The third direction, the second direction, and the first direction are perpendicular to each other.

[0017] In the above scheme, since the thermal management component is located between the positive and negative terminals, the assembly space of the electrode terminals of the battery cell is large and will not interfere with the thermal management component, which reduces the difficulty of electrically connecting the electrode terminals of different battery cells, and thus reduces the assembly difficulty of the battery cells.

[0018] In one or more embodiments of the first aspect, the positive terminal of one of two adjacent battery cells and the negative terminal of the other are located on the same side of the thermal management component.

[0019] In the above scheme, since the positive terminal of one of two adjacent battery cells and the negative terminal of the other are located on the same side of the thermal management component, it is not necessary to pass through the thermal management component when electrically connecting the positive and negative terminals of the two adjacent battery cells, which reduces the assembly difficulty of the battery device.

[0020] In one or more embodiments of the first aspect, the battery cell has a first surface facing the housing component, the first surface including a first end region and a second end region, and a positive terminal and a negative terminal disposed between the first end region and the second end region along a third direction. The battery device further includes: a first support member disposed on the housing component and in contact with the first end region; and / or, a second support member disposed on the housing component and in contact with the second end region.

[0021] In the above solution, the supporting components allow the housing to bear part of the weight of the battery cells, reducing the risk of thermal management components failing due to excessive stress. Simultaneously, the end regions of the battery cells generally possess high structural strength. Since the supporting components are in contact with the end regions, placing the stress points of the battery cells in these regions helps ensure better structural stability after assembly.

[0022] In one or more embodiments of the first aspect, the first support member, the first surface, the thermal management member, and the housing member together define a first channel, and the battery device further includes a first bus member disposed in the first channel for electrically connecting two adjacent battery cells; and / or, the second support member, the first surface, the thermal management member, and the housing member together define a second channel, and the battery device further includes a second bus member disposed in the second channel for electrically connecting two adjacent battery cells.

[0023] In the above scheme, the arrangement of the first channel and / or the second channel can provide sufficient space for the assembly of the first busbar and / or the second busbar, which helps to reduce the assembly difficulty of the battery device.

[0024] In one or more embodiments of the first aspect, the first support member extends along a first direction and contacts a plurality of battery cells; and / or, the second support member extends along the first direction and contacts a plurality of battery cells.

[0025] In the above scheme, one support component contacts multiple battery cells. On the one hand, multiple battery cells can be supported by assembling one support component, resulting in high assembly efficiency. On the other hand, the gravity or assembly force of multiple battery cells can be evenly distributed by the support component, reducing the risk of excessive deformation of the casing components and improving the structural stability of the battery device.

[0026] In one or more embodiments of the first aspect, the dimensions of the first support member are the same as those of the thermal management member along the second direction; and / or, the dimensions of the second support member are the same as those of the thermal management member along the second direction.

[0027] In the above scheme, since the supporting component and the thermal management component have the same dimensions in the second direction, it is beneficial to provide stable support for the battery cell while shortening the heat exchange path between the thermal management component and the battery cell, improving the heat exchange effect of the battery cell, and thus improving the reliability of the battery device.

[0028] In one or more embodiments of the first aspect, the limiting member is provided with a first notch extending along a first direction, the first notch being connected to a first channel; and / or, the limiting member is provided with a second notch extending along the first direction, the second notch being connected to a second channel.

[0029] In the above scheme, the electrical energy of multiple battery cells can be drawn out through the busbar passing through the gap, which reduces the assembly difficulty of multiple battery cells.

[0030] In one or more embodiments of the first aspect, each limiting member includes a third end and a fourth end disposed opposite to each other along a third direction. A first notch extends to the first end along a second direction, and the first notch extends to the third end along a third direction; and / or, a second notch extends to the first end along a second direction, and the second notch extends to the fourth end along a third direction.

[0031] In the above scheme, the gap has a large area, which helps to provide sufficient space for the assembly of the busbar and reduces the assembly difficulty of the battery device.

[0032] In one or more embodiments of the first aspect, the battery cell is a square battery cell, and the surface of the battery cell in the first direction is the surface with the largest area in the battery cell.

[0033] In the above scheme, since the deformation of the battery cell in the first direction is large, placing the first end cap at the end of the first end battery cell near the housing component can reduce the risk of excessive deformation causing the first end cap and the first housing to separate.

[0034] In one or more embodiments of the first aspect, the housing component is located below the battery cell along the direction of gravity.

[0035] In the above scheme, the housing component supports the battery cell below the direction of gravity of the battery cell, which helps to improve the stability of the battery device after assembly.

[0036] In one or more embodiments of the first aspect, the limiting member is an end plate. The battery device also includes a housing for accommodating individual battery cells. The housing component is the bottom wall of the housing.

[0037] In the above scheme, using the bottom wall of the box itself as the box component is beneficial to improving the energy density of the battery device and simplifying the assembly process.

[0038] In one or more embodiments of the first aspect, each limiting member includes a first end and a second end disposed opposite to each other along a second direction, the first end being connected to the housing component, and the second direction intersecting the first direction. The first end is connected to the housing component, and the second end is a free end.

[0039] In the above solution, since the second end of the limiting member is a free end and the first end is connected to the housing component, placing the first connecting part at the end of the first end battery cell near the housing component can significantly reduce the risk of failure of the first connecting part when the first end battery cell expands and deforms.

[0040] In one or more embodiments of the first aspect, the battery cell further includes a pressure relief mechanism disposed at one end of the battery cell away from the housing component along a second direction, the second direction intersecting the first direction.

[0041] In the above solution, since the pressure relief mechanism is located at the end of the battery cell facing away from the casing component along the second direction, the risk of damage to the casing component during battery cell pressure relief, leading to a rapid decrease in the structural stability of the battery device, can be reduced. Simultaneously, it reduces the risk of the casing component obstructing the discharge of substances from the battery cell, resulting in poor pressure relief.

[0042] Secondly, this application provides a battery device that includes the battery device described in one or more of the above embodiments.

[0043] In the above solutions, since the battery cells in one or more of the above embodiments have high reliability, the electrical devices including the battery devices in one or more of the above embodiments also have high reliability.

[0044] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0045] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0046] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0047] Figure 2 is an exploded view of a battery device according to some embodiments of this application;

[0048] Figure 3 is an exploded view of a battery cell according to some embodiments of this application;

[0049] Figure 4 is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application;

[0050] Figure 5 is a schematic diagram of a partial structure of a battery device according to some embodiments of this application;

[0051] Figure 6 is a schematic diagram of the structure of the limiting member according to some embodiments of this application;

[0052] Figure 7 is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application;

[0053] Figure 8 is a magnified view of part A in Figure 7.

[0054] The reference numerals in the detailed embodiments are as follows:

[0055] 1000 - Vehicle; 200 - Controller; 300 - Motor; 100 - Battery Unit; 11 - Housing; 111 - First Housing; 112 - Second Housing; 12 - Battery Cell; 1201 - First End Battery Cell; 12011 - First End Cap; 12012 - First Housing; 12013 - First Connecting Part; 1202 - Second End Battery Cell; 12021 - Second End Cap; 12022 - Second Housing; 12023 - Second Connecting Part; 121 - Outer Housing; 1211 - End Cap; 1212 - Housing; 122 - Electrode Assembly; 123 - Electrode terminal; 124-Pressure relief mechanism; 1231-Positive terminal; 1232-Negative terminal; 125-First surface; 1251-First end region; 1252-Second end region; 13-Box component; 14-Limiting component; 141-First end; 142-Second end; 143-Third end; 144-Fourth end; 15-Thermal management component; 16-First support component; 17-Second support component; 18-First channel; 19-Second channel; 20-First notch; 21-Second notch; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0061] In this application, the battery cell may include, but is not limited to, lithium-ion secondary battery devices, lithium-ion primary battery devices, lithium-sulfur battery devices, sodium-lithium-ion battery devices, sodium-ion battery devices, or magnesium-ion battery devices. The shape of the battery cell may include, but is not limited to, cylindrical, flat, cuboid, or other shapes. According to the packaging method, the battery cell may include, but is not limited to, cylindrical battery cells, square battery cells, pouch battery cells, and blade battery cells.

[0062] In high-power applications such as electric vehicles, battery devices are used at three levels: individual battery cells, battery modules, and battery packs. A battery module is formed by electrically connecting a number of individual battery cells and placing them in a frame to protect them from external shocks, heat, and vibration. A battery pack refers to the final state of the battery system installed in an electric vehicle. The battery pack mentioned in the embodiments of this application refers to a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. A battery pack generally includes a housing for encapsulating one or more individual battery cells. The housing reduces the risk of liquids or other foreign matter affecting the charging or discharging of the individual battery cells.

[0063] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0064] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0065] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0066] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0067] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0068] The following discussion will primarily focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable in some respects to cylindrical battery cells, pouch cell cells, or blade cell cells.

[0069] In a typical battery cell structure, a battery cell includes a casing, electrode assemblies, and electrolyte. The casing includes end caps and a housing; the end caps close the openings of the housing to define a space for accommodating the electrode assemblies.

[0070] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, the reliability of the battery device also needs to be considered.

[0071] Typically, a row of battery cells is positioned between two limiting members, which confine the cells within the row. During charging and discharging, the casing of each battery cell undergoes deformation, such as expansion or contraction. If the battery cell located at the middle of the row is not supported by sufficient force, there is a higher risk of its casing and end cap separating, a higher risk of electrolyte leakage, and lower reliability of the battery assembly.

[0072] In view of this, this application provides a battery device, which includes a housing component, two limiting members, and a plurality of battery cells. The two limiting members are spaced apart along a first direction, and each limiting member includes a first end and a second end disposed opposite to each other along a second direction. The first end is connected to the housing component, and the second direction intersects the first direction. The plurality of battery cells are arranged along the first direction and disposed between the two limiting members. The plurality of battery cells include a first end battery cell located at one end along the first direction. The first end battery cell includes a first housing and a first end cap. The first housing has a first opening, and the first end cap covers the first opening and is connected to the first housing. Along the second direction, the first end cap is located at the end of the first end battery cell closer to the housing component. Because the first end of the limiting member is connected to the housing component, and the first end cap is located at the end of the first end battery cell closer to the housing component, when the first end battery cell expands and deforms, the limiting member has a strong ability to suppress the deformation of the end of the first end battery cell closer to the housing component. This improves the limiting member's ability to restrict the separation of the first end cap and the first housing, giving the first end battery cell higher structural stability. Therefore, this arrangement helps to improve the reliability of the battery device.

[0073] The technical solutions described in the embodiments of this application are applicable to battery cells, battery devices, and electrical equipment using battery devices.

[0074] Electrical equipment includes, but is not limited to: electric vehicles, electric cars, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0075] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0076] For example, Figure 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a fuel-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 may have a motor 300, a controller 200, and a battery device 100 installed inside. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0077] To meet different power demands, the battery device 100 may include multiple battery cells 12, which can be connected in series, parallel, or in a mixed configuration. The battery device 100 may also be referred to as a battery pack. Optionally, the multiple battery cells 12 can first be connected in series, parallel, or in a mixed configuration to form a battery module, and then the multiple battery modules can be connected in series, parallel, or in a mixed configuration to form the battery device 100. That is, the multiple battery cells 12 can directly form the battery device 100, or they can first be formed into battery modules, and then the battery modules can be combined to form the battery device 100.

[0078] For example, please refer to Figure 2, which is an exploded view of a battery device 100 according to some embodiments of this application. The battery device 100 may include a plurality of battery cells 12. The battery device 100 may also include a housing 11, which has a hollow internal structure, and the plurality of battery cells 12 are housed within the housing 11. As shown in Figure 2, these are referred to here as a first housing 111 and a second housing 112, which are fastened together. The shapes of the first housing 111 and the second housing 112 can be determined according to the shape of the combination of the plurality of battery cells 12. Both the first housing 111 and the second housing 112 may have an open surface. For example, both the first housing 111 and the second housing 112 may be hollow cuboids with only one open surface each. The open surfaces of the first housing 111 and the second housing 112 are arranged opposite to each other, and the first housing 111 and the second housing 112 are fastened together to form a housing 11 with a closed cavity. Multiple battery cells 12 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the first housing 111 and the second housing 112 being fastened together.

[0079] Optionally, the battery device 100 may also include other structures, which will not be described in detail here. For example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 12, such as in parallel, series, or mixed connection. Specifically, the busbar component can realize electrical connection between battery cells 12 by connecting the electrode terminals 123 of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals 123 of the battery cells 12 by welding. The electrical energy of the multiple battery cells 12 can be further led out through the housing 11 via a conductive mechanism.

[0080] The number of battery cells 12 can be set to any value depending on different power requirements. Multiple battery cells 12 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 100 may include a large number of battery cells 12, for ease of installation, the battery cells 12 can be grouped, with each group of battery cells 12 forming a battery module. The number of battery cells 12 included in a battery module is unlimited and can be set according to requirements. The battery device 100 may include multiple battery modules, which can be connected in series, parallel, or mixed connection.

[0081] Please refer to Figure 3, which is an exploded view of a battery cell 12 according to some embodiments of this application. The battery cell 12 includes one or more electrode assemblies 122 and a housing 121. The housing 121 may include a shell 1212, and multiple walls of the shell 1212 form a cavity that can be used to accommodate the electrode assemblies 122. The shape of the shell 1212 depends on the combined shape of the one or more electrode assemblies 122. For example, the shell 1212 may be a hollow cuboid, cube, or regular polyhedron, and one face of the shell 1212 has an opening so that one or more electrode assemblies 122 can be placed inside the shell 1212. The shell 1212 is filled with an electrolyte, such as an electrolyte solution.

[0082] The battery cell 12 may also include two electrode terminals 123, which can be disposed on an end cap 1211. The end cap 1211 is typically flat, and the two electrode terminals 123 are fixed to the flat surface of the end cap 1211. The two electrode terminals 123 are respectively a positive terminal 1231 and a negative terminal 1232. Each electrode terminal 123 is provided with a corresponding adapter piece, which is located between the end cap 1211 and the electrode assembly 122, for electrically connecting the electrode assembly 122 and the electrode terminal 123. In this battery cell 12, depending on actual usage requirements, the electrode assembly 122 can be configured as a single unit or multiple units, and multiple independent electrode assemblies 122 are disposed within the battery cell 12.

[0083] According to some embodiments of this application, referring to Figures 4, 7, and 8, this application provides a battery device 100. The battery device 100 includes a housing component 13, two limiting members 14, and a plurality of battery cells 12. The two limiting members 14 are spaced apart along a first direction X and are connected to the housing component 13. The plurality of battery cells 12 are arranged along the first direction X and disposed between the two limiting members 14. Among them, the plurality of battery cells 12 includes a first end battery cell 1201 located at one end along the first direction X. The first end battery cell 1201 includes a first housing 12012 and a first end cap 12011. The first housing 12012 has a first opening. The first end cap 12011 covers the first opening and is connected to the first housing 12012 to form a first connecting portion 12013. Along the first direction X, the projection of the first connecting portion 12013 at least partially overlaps with the limiting member 14.

[0084] Two limiting members 14 are used to restrict the position of a plurality of battery cells 12 in the first direction X. In some embodiments, the side of the first end battery cell 1201 closest to the limiting member 14 in the first direction X contacts the limiting member 14, that is, when the first end battery cell 1201 expands and deforms, the expansion force can be transmitted to the limiting member 14 in a contact force manner. In other embodiments, a heat insulation pad is also provided between the first end battery cell 1201 and the limiting member 14 in the first direction X, that is, when the first end battery cell 1201 expands and deforms, the expansion force can be transmitted to the limiting member 14 by the heat insulation pad in a contact force manner.

[0085] Along the first direction X, the projection of the first connecting portion 12013 overlaps at least partially with the limiting member 14, which means that when the first end battery cell 1201 expands and deforms, the limiting member 14 can provide a certain supporting force to the first connecting portion 12013, reducing the risk of failure of the first connecting portion 12013.

[0086] In some embodiments, the limiting member 14 is an expansion beam, and the first end battery cell 1201 is supported by the expansion beam on one side in the first direction X. In other embodiments, the expansion beam is a hollow structure.

[0087] In some embodiments, the battery device 100 further includes a pressure strip disposed on the side of the battery cell 12 away from the housing component 13 along the second direction Y, for jointly limiting the position of the battery cell 12 with the housing component 13 in the second direction Y, the second direction Y intersecting the first direction X.

[0088] In some embodiments, the battery device 100 further includes a strap surrounding a plurality of battery cells 12. In other embodiments, the strap includes a first portion and a second portion, which are perpendicular to each other in a third direction Z, a second direction Y, and a first direction X. Two first portions are provided, each disposed on the surface of the limiting member 14 in the first direction X facing away from the battery cell 12 and on its two surfaces in the third direction Z. Two second portions are provided, each disposed on one side of the battery cell 12 in the third direction Z. One second portion extends along the first direction X and connects one end of the two first portions, and the other second portion extends along the first direction X and connects the other end of the two first portions. The strap can bind the plurality of battery cells 12 together through the limiting member 14, with the second direction Y intersecting the first direction X.

[0089] The first end cap 12011 can be connected to the first housing 12012 by welding or bonding to form a first connecting portion 12013. In some embodiments, the first end cap 12011 is connected to the first housing 12012 by welding, and the first connecting portion 12013 formed by welding has an annular structure.

[0090] In some embodiments, the battery cell 12 and the housing component 13 are bonded together with an adhesive.

[0091] In some embodiments, the battery cell 12 is connected to the housing component 13 by fasteners.

[0092] In some embodiments, the plurality of battery cells 12 includes a second end battery cell 1202 located at the other end along a first direction X. The second end battery cell 1202 includes a second housing 12022 and a second end cap 12021. The second housing 12022 has a second opening, and the second end cap 12021 covers the second opening and is connected to the second housing 12022 to form a second connection portion 12023. Along a second direction Y, the second connection portion 12023 is located at the end of the second end battery cell 1202 away from the housing component 13, and the second direction Y intersects the first direction X.

[0093] In some embodiments, the plurality of battery cells 12 includes a central battery cell located between the second end battery cell 1202 and the first end battery cell 1201 along a first direction X. The central battery cell includes a third housing and a third end cap. The third housing has a third opening, and the third end cap covers the third opening and is connected to the third housing to form a third connection portion. Along a second direction Y, the third connection portion is located at the end of the central battery cell away from the housing component 13. In other embodiments, along the second direction Y, the third connection portion is located at the end of the central battery cell near the housing component 13. In still other embodiments, a plurality of central battery cells are provided, and along the second direction Y, some third connection portions are located at the end of the central battery cell near the housing component 13, and other third connection portions are located at the end of the central battery cell away from the housing component 13, where the second direction Y intersects the first direction X.

[0094] The surface of the first end battery cell 1201 in the first direction X can be any surface of the battery cell 12.

[0095] In some embodiments, the battery cell 12 further includes a pressure relief mechanism 124 and an electrode terminal 123, which may be located on the same side of the battery cell 12 or on different sides of the battery cell 12.

[0096] In some embodiments, the battery cell 12 further includes a pressure relief mechanism 124, which is disposed on the side of the battery cell 12 near the housing component 13 in the second direction Y, where the second direction Y intersects the first direction X.

[0097] In some embodiments, the battery cell 12 further includes a positive terminal 1231 and a negative terminal 1232, which may be located on the same side of the battery cell 12 or on different sides of the battery cell 12. In other embodiments, the positive terminal 1231 and the negative terminal 1232 of the battery cell 12 are both located on the side of the battery cell 12 away from the housing component 13 along the second direction Y. In still other embodiments, the positive terminal 1231 and the negative terminal 1232 of the battery cell 12 are located on different sides of the battery cell 12, and the positive terminal 1231 of one of two adjacent battery cells 12 and the negative terminal 1232 of the other are located on the same side of the battery cell 12. This simplifies the electrical connection of the electrode terminals 123 of two adjacent battery cells 12. The second direction Y intersects the first direction X.

[0098] In some embodiments, the housing component 13 is located above the battery cell 12 in the direction of gravity.

[0099] In some embodiments, the housing component 13 is provided with a flow channel inside, and a heat exchange medium is provided inside the flow channel. The heat exchange medium is used to regulate the temperature of the battery cell 12.

[0100] In the technical solution of this application embodiment, since the first end 141 of the limiting member 14 is connected to the housing component 13, and the first end cap 12011 is located at the end of the first end battery cell 1201 near the housing component 13, the limiting member 14 has a strong ability to suppress the deformation of the end of the first end battery cell 1201 near the housing component 13 when the first end battery cell 1201 expands and deforms. This improves the ability of the limiting member 14 to restrict the separation of the first end cap 12011 and the first housing 12012, giving the first end battery cell 1201 higher structural stability. Furthermore, this arrangement helps to improve the reliability of the battery device 100.

[0101] According to some embodiments of this application, referring to Figures 4 and 7, each limiting member 14 includes a first end 141 and a second end 142 disposed opposite to each other along a second direction Y. The first end 141 is connected to the housing component 13, and the second direction Y intersects the first direction X. Along the second direction Y, a first connecting portion 12013 is located at the end of the first end battery cell 1201 near the housing component 13.

[0102] In some embodiments, the second direction Y is parallel to the direction of gravity.

[0103] The first end 141 can be connected to the housing component 13 by means of welding, bonding or fastener connection.

[0104] In some embodiments, please refer to Figures 7 and 8. The dashed lines in Figures 7 and 8 show the positions of the first end battery cell 1201 and the limiting member 14 after expansion and deformation in some embodiments. Since the first end 141 is connected to the housing component 13, and along the second direction Y, the first connecting portion 12013 is located at the end of the first end battery cell 1201 near the housing component 13, when the first end battery cell 1201 expands and deforms, the first connecting portion 12013 is closer to the junction of the limiting member 14 and the housing component 13. The displacement of the limiting member 14 is smaller, or the tendency to have a large displacement is smaller, which can provide greater support force for the first connecting portion 12013 and reduce the risk of failure of the first connecting portion 12013. Taking the connection of the first end cap 12011 and the first housing 12012 by welding to form the first connecting portion 12013 as an example, along the second direction Y, setting the first connecting portion 12013 at the end of the first end battery cell 1201 near the housing component 13 helps to reduce the risk of weld cracking. This helps reduce the risk of electrolyte leakage.

[0105] In the above solution, the end of the limiting member 14 along the second direction Y near the housing component 13 has a stronger ability to suppress the deformation of the first end battery cell 1201. Setting the first connection part 12013 at the end of the first end battery cell 1201 near the housing component 13 can further reduce the risk of leakage of the first end battery cell 1201 due to failure of the first connection part 12013.

[0106] According to some embodiments of this application, referring to Figures 4 and 7, a plurality of battery cells 12 include a second end battery cell 1202 located at the other end along a first direction X. The second end battery cell 1202 includes a second housing 12022 and a second end cap 12021. The second housing 12022 has a second opening. The second end cap 12021 covers the second opening and is connected to the second housing 12022 to form a second connection portion 12023. Along the first direction X, the projection of the second connection portion 12023 at least partially overlaps with the limiting member 14.

[0107] Along the first direction X, the projection of the second connecting portion 12023 overlaps at least partially with the limiting member 14, which means that when the second end battery cell 1202 expands and deforms, the limiting member 14 can provide a certain supporting force to the second connecting portion 12023, reducing the risk of failure of the second connecting portion 12023.

[0108] The second end cap 12021 can be connected to the second housing 12022 by welding or bonding to form a second connecting portion 12023. In some embodiments, the second end cap 12021 is connected to the second housing 12022 by welding, and the second connecting portion 12023 formed by welding has an annular structure.

[0109] In some embodiments, the plurality of battery cells 12 includes a middle battery cell located along the first direction X between the second end battery cell 1202 and the first end battery cell 1201. The middle battery cell includes a third housing and a third end cap. The third housing has a third opening, and the third end cap covers the third opening and is connected to the third housing to form a third connection portion. Since the middle battery cell is constrained by battery cells 12 on both sides in the first direction X, the risk of failure of the third connection portion is lower than that of the first end battery cell 1201 and the second end battery cell 1202.

[0110] In the above solution, since the limiting member 14 is connected to the housing component 13, and the projection of the second connecting portion 12023 overlaps with the limiting member 14 at least partially along the first direction X, the limiting member 14 has a strong ability to suppress the deformation of the side of the second end battery cell 1202 closer to the housing component 13 when the second end battery cell 1202 expands and deforms. This reduces the risk of leakage of the second end battery cell 1202 due to the failure of the second connecting portion 12023, thus giving the second end battery cell 1202 higher structural stability. Furthermore, this arrangement helps improve the reliability of the battery device 100.

[0111] According to some embodiments of this application, referring to Figures 4 and 7, each limiting member 14 includes a first end 141 and a second end 142 disposed opposite to each other along a second direction Y. The first end 141 is connected to the housing component 13, and the second direction Y intersects with the first direction X. Along the second direction Y, a second connecting portion 12023 is located at the end of the second end battery cell 1202 near the housing component 13.

[0112] Since the first end 141 is connected to the housing component 13, and the second connecting portion 12023 is located at the end of the second end battery cell 1202 near the housing component 13 along the second direction Y, when the second end battery cell 1202 expands and deforms, the second connecting portion 12023 is closer to the junction of the limiting member 14 and the housing component 13. The limiting member 14 experiences less displacement, or a smaller tendency to undergo large displacement, thus providing greater support for the second connecting portion 12023 and reducing the risk of separation. Taking the connection of the second end cap 12021 and the second housing 12022 by welding to form the second connecting portion 12023 as an example, placing the second connecting portion 12023 at the end of the second end battery cell 1202 near the housing component 13 along the second direction Y helps reduce the risk of weld cracking. This, in turn, helps reduce the risk of electrolyte leakage.

[0113] In the above solution, the end of the limiting member 14 along the second direction Y near the housing component 13 has a stronger ability to suppress the deformation of the second end battery cell 1202. Setting the second connection part 12023 at the end of the second end battery cell 1202 near the housing component 13 can further reduce the risk of leakage of the second end battery cell 1202 due to failure of the second connection part 12023.

[0114] According to some embodiments of this application, please refer to FIG4. The battery device 100 further includes a thermal management component 15 located between the battery cell 12 and the housing component 13 along the second direction Y. The thermal management component 15 is used to regulate the temperature of the battery cell 12. The second direction Y intersects the first direction X.

[0115] In some embodiments, a heat exchange medium is provided in the thermal management component 15. The heat exchange medium is used to regulate the temperature of the battery cell 12. The heat exchange medium can be liquid, gas, or a gas-liquid mixture, etc.

[0116] In some embodiments, the thermal management component 15 is a heat exchange plate.

[0117] In some embodiments, the thermal management component 15 is a heat exchange tube. In other embodiments, the heat exchange tube is a flat tube.

[0118] In some embodiments, thermally conductive adhesive is provided between the battery cell 12 and the thermal management component 15.

[0119] In the above scheme, the thermal management component 15 is located between the battery cell 12 and the housing component 13, which helps to shorten the heat exchange path of the thermal management component 15 to the battery cell 12, improve the heat exchange effect of the thermal management component 15, and thus improve the reliability of the battery cell 12.

[0120] According to some embodiments of this application, referring to Figures 4 and 5, the battery cell 12 includes a positive terminal 1231 and a negative terminal 1232. Along the second direction Y, the positive terminal 1231 and the negative terminal 1232 are disposed at one end of the battery cell 12 near the housing component 13. The positive terminal 1231 and the negative terminal 1232 are spaced apart along the third direction Z. The thermal management component 15 is located between the positive terminal 1231 and the negative terminal 1232. The third direction Z, the second direction Y and the first direction X are perpendicular to each other.

[0121] In some embodiments, the positive terminal 1231 of one of two adjacent battery cells 12 and the negative terminal 1232 of the other are located on different sides of the thermal management component 15. In other embodiments, both the positive terminal 1231 and the negative terminal 1232 are disposed on the side of the battery cell 12 closer to the housing component 13. To avoid electrical connection of the electrode terminals 123, the thermal management component 15 includes a body portion and a plurality of protrusions. The body portion is disposed on the housing component 13, and the positive terminal 1231 and the negative terminal 1232 are located on opposite sides of the protrusions in the third direction Z, with adjacent protrusions disposed between them. The electrical connection between the positive terminal 1231 of one of two adjacent battery cells 12 and the negative terminal 1232 of the other can be achieved through the gap between the adjacent protrusions.

[0122] In some embodiments, the battery cell 12 is not interfered with by the limiting member 14 on both sides in the third direction Z, and the assembly space is large.

[0123] In the above scheme, since the thermal management component 15 is located between the positive terminal 1231 and the negative terminal 1232, the assembly space of the electrode terminals 123 of the battery cell 12 is large and will not interfere with the thermal management component 15, which reduces the difficulty of electrically connecting the electrode terminals 123 of different battery cells 12, thereby reducing the assembly difficulty of the battery cell 12.

[0124] According to some embodiments of this application, referring to Figures 4 and 5, the positive terminal 1231 of one of two adjacent battery cells 12 and the negative terminal 1232 of the other are located on the same side of the thermal management component 15.

[0125] In some embodiments, the positive terminal 1231 of one of two adjacent battery cells 12 and the negative terminal 1232 of the other are connected by a busbar. After the battery cells 12 are assembled, since the positive terminal 1231 of one of the two adjacent battery cells 12 and the negative terminal 1232 of the other are located on the same side of the thermal management component 15, the busbar will not interfere with the thermal management component 15. Furthermore, a shorter busbar can be used, which is beneficial for improving the energy density of the battery device 100.

[0126] In the above scheme, since the positive terminal 1231 of one of the two adjacent battery cells 12 and the negative terminal 1232 of the other are located on the same side of the thermal management component 15, it is not necessary to pass through the thermal management component 15 when electrically connecting the positive and negative terminals of the two adjacent battery cells 12, which reduces the assembly difficulty of the battery device 100.

[0127] According to some embodiments of this application, referring to Figures 4 and 5, the battery cell 12 has a first surface 125 facing the housing component 13. The first surface 125 includes a first end region 1251 and a second end region 1252. Along a third direction Z, a positive terminal 1231 and a negative terminal 1232 are disposed between the first end region 1251 and the second end region 1252. The battery device 100 further includes: a first support member 16 disposed on the housing component 13 and in contact with the first end region 1251; and / or, a second support member 17 disposed on the housing component 13 and in contact with the second end region 1252.

[0128] In some embodiments, the first support member 16 may correspond to one or more battery cells 12. The second support member 17 may correspond to one or more battery cells 12.

[0129] In some embodiments, in the first direction X, the dimensions of the first support member 16 and / or the dimensions of the second support member 17 are the same as the dimensions of the housing member 13.

[0130] In some embodiments, in the second direction Y, the size of the first support member 16 and / or the size of the second support member 17 is greater than or less than the size of the thermal management member 15.

[0131] In some embodiments, within the same projection plane perpendicular to the second direction Y, the orthographic projection of the end region at least partially overlaps with the orthographic projection of the housing 1212, resulting in stronger structural stability of the end region. The contact or connection between the support member and the end region reduces the risk of excessive deformation of the battery cell 12 even when subjected to force.

[0132] In the above scheme, the supporting components allow the housing component 13 to bear part of the weight of the battery cell 12, reducing the risk of the thermal management component 15 failing due to excessive stress. Meanwhile, the end region of the battery cell 12 generally has high structural strength. Since the supporting components are in contact at the end region, placing the stress point of the battery cell 12 in the end region helps to ensure better structural stability after assembly.

[0133] According to some embodiments of this application, referring to Figures 4 and 5, the first support member 16, the first surface 125, the thermal management member 15, and the housing member 13 together define a first channel 18. The battery device 100 also includes a first busbar member disposed in the first channel 18, which is used to electrically connect two adjacent battery cells 12; and / or, the second support member 17, the first surface 125, the thermal management member 15, and the housing member 13 together define a second channel 19. The battery device 100 also includes a second busbar member disposed in the second channel 19, which is used to electrically connect two adjacent battery cells 12.

[0134] In some embodiments, the busbar is a spool.

[0135] In some embodiments, the busbar component includes an isolator and a swivel, the swivel being disposed on the isolator.

[0136] In the above scheme, the arrangement of the first channel 18 and / or the second channel 19 can provide sufficient space for the assembly of the first busbar and / or the second busbar, which helps to reduce the assembly difficulty of the battery device 100.

[0137] According to some embodiments of this application, referring to Figures 4 and 5, a first support member 16 extends along a first direction X and contacts a plurality of battery cells 12; and / or, a second support member 17 extends along the first direction X and contacts a plurality of battery cells 12.

[0138] In some embodiments, the battery device 100 includes a plurality of battery cell assemblies, each battery cell assembly including two limiting members 14 and a plurality of battery cells 12, a first support member 16, and / or a second support member 17, all of which are in contact with the plurality of battery cells 12 of the same battery cell assembly.

[0139] In the above scheme, one support component contacts multiple battery cells 12. On the one hand, multiple battery cells 12 can be supported by assembling one support component, resulting in high assembly efficiency. On the other hand, the gravity or assembly force of multiple battery cells 12 can be evenly distributed by the support component, reducing the risk of excessive deformation of the housing component 13 and improving the structural stability of the battery device 100.

[0140] According to some embodiments of this application, referring to Figures 4 and 5, along the second direction Y, the dimensions of the first support member 16 are the same as the dimensions of the thermal management member 15; and / or, along the second direction Y, the dimensions of the second support member 17 are the same as the dimensions of the thermal management member 15.

[0141] Along the second direction Y, the dimensions of the first support member 16 are the same as those of the thermal management member 15; and / or, along the second direction Y, the dimensions of the second support member 17 are the same as those of the thermal management member 15. This means that while the support members provide support for the battery cell 12 to make the battery cell 12 more stable, there is a shorter heat exchange path between the battery cell 12 and the thermal management member 15.

[0142] In the above scheme, since the supporting component and the thermal management component 15 have the same dimensions in the second direction Y, it is beneficial to provide stable support for the battery cell 12 while shortening the heat exchange path between the thermal management component 15 and the battery cell 12, improving the heat exchange effect of the battery cell 12, and thus improving the reliability of the battery device 100.

[0143] According to some embodiments of this application, referring to Figures 4-7, the limiting member 14 is provided with a first notch 20 extending along the first direction X, and the first notch 20 is connected to the first channel 18; and / or, the limiting member 14 is provided with a second notch 21 extending along the first direction X, and the second notch 21 is connected to the second channel 19.

[0144] The busbar used to draw electrical energy from multiple battery cells 12 can be a rigid busbar or a flexible busbar. In some embodiments, the busbar is electrically connected to the electrode terminals 123 of the end battery cells 12 by welding.

[0145] In some embodiments, the first notch 20 and the second notch 21 are connected, and the limiting member 14 is U-shaped.

[0146] Provided that it is connected to the channel, the notch can be set at any position of the limiting member 14.

[0147] In some embodiments, the notch may be formed by machining.

[0148] In the above scheme, the electrical energy of multiple battery cells 12 can be drawn out by the busbar passing through the gap, which reduces the assembly difficulty of multiple battery cells 12.

[0149] According to some embodiments of this application, referring to Figures 4-7, each limiting member 14 includes a third end 143 and a fourth end 144 disposed opposite each other along a third direction Z. A first notch 20 extends along a second direction Y to the first end 141, and the first notch 20 extends along a third direction Z to the third end 143; and / or, a second notch 21 extends along a second direction Y to the first end 141, and the second notch 21 extends along a third direction Z to the fourth end 144.

[0150] In some embodiments, referring to Figures 5 and 6, the limiting member 14 is T-shaped. While meeting the requirement of avoiding the busbar, the limiting member 14 and the housing component 13 have a large overlap area, which is beneficial to have a high connection strength between the two.

[0151] In the above scheme, the notch has a large area, which is conducive to providing sufficient space for the assembly of the busbar and reducing the assembly difficulty of the battery device 100.

[0152] According to some embodiments of this application, referring to Figures 4-7, the battery cell 12 is a square battery cell 12, and the surface of the battery cell 12 in the first direction X is the surface with the largest area in the battery cell 12.

[0153] Generally, the square battery cell with the largest area has the greatest surface deformation.

[0154] In the above solution, the first end cap 12011 is located at the end of the first end battery cell 1201 near the housing component 13, which can reduce the risk of excessive deformation causing the first end cap 12011 and the first housing 12012 to separate.

[0155] According to some embodiments of this application, referring to Figures 4-7, the housing component 13 is located below the battery cell 12 along the direction of gravity.

[0156] Compared to the embodiment where the housing component 13 is located above the battery cell 12 along the direction of gravity, the embodiment where the housing component 13 is located below the battery cell 12 along the direction of gravity eliminates at least some of the connecting components used to fix the battery cell 12 in the direction of gravity. This is beneficial for improving the energy density of the battery device 100.

[0157] In the above scheme, the housing component 13 supports the battery cell 12 below the direction of gravity of the battery cell 12, which is beneficial to improving the stability of the battery device 100 after assembly.

[0158] According to some embodiments of this application, referring to Figures 4-7, the limiting member 14 is an end plate. The battery device 100 also includes a housing 11 for accommodating individual battery cells 12. The housing component 13 is the bottom wall of the housing 11.

[0159] The material of the end plate can be the same as or different from that of the housing component 13.

[0160] In some embodiments, the end plate material may include copper, aluminum, steel, alloy, fiber composite materials, etc.

[0161] In some embodiments, the limiting member 14 is welded to the bottom wall.

[0162] In some embodiments, the limiting member 14 is connected to the bottom wall by fasteners.

[0163] In some embodiments, the housing 11 includes a cover and a lower housing 11, the lower housing 11 having an opening, the cover closing the opening, and the bottom wall being the wall portion of the lower housing 11 opposite to the cover.

[0164] In the above scheme, using the bottom wall of the box 11 itself as the box component 13 is beneficial to improving the energy density of the battery device 100 and simplifying the assembly process.

[0165] According to some embodiments of this application, referring to Figures 4-7, each limiting member 14 includes a first end 141 and a second end 142 disposed opposite to each other along a second direction Y. The first end 141 is connected to the housing component 13, and the second direction Y intersects with the first direction X. The first end 141 is connected to the housing component 13, and the second end 142 is a free end.

[0166] Referring to Figures 7 and 8, the displacement amplitude of the free end is greater than that of the first end 141. By placing the first connecting part 12013 at one end close to the housing component 13, the risk of failure of the first connecting part 12013 can be significantly reduced.

[0167] In the above solution, since the second end 142 of the limiting member 14 is a free end and the first end 141 is connected to the housing component 13, the first connecting part 12013 is disposed at the end of the first end battery cell 1201 near the housing component 13. When the first end battery cell 1201 expands and deforms, the risk of failure of the first connecting part 12013 can be significantly reduced.

[0168] According to some embodiments of this application, referring to Figures 4-7, the battery cell 12 further includes a pressure relief mechanism 124, which is disposed at one end of the battery cell 12 away from the housing component 13 along the second direction Y, and the second direction Y intersects with the first direction X.

[0169] The pressure relief mechanism 124 refers to an element or component that is actuated to release internal pressure or temperature when the internal pressure, temperature, or other conditions of the battery cell 12 reach a predetermined threshold. This threshold design varies depending on design requirements. The threshold may depend on one or more materials of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 12. The pressure relief mechanism 124 can take the form of an explosion-proof valve, gas valve, pressure relief valve, or safety valve, and can specifically employ pressure-sensitive or temperature-sensitive elements or structures. That is, when the internal pressure, temperature, or other conditions of the battery cell 12 reach the predetermined threshold, the pressure relief mechanism 124 performs an action, or a weak structure provided in the pressure relief mechanism 124 is damaged, thereby forming an opening or channel for releasing internal pressure or temperature. Generally, the melting point and / or thickness of the weak structure is lower than other areas of the pressure relief mechanism 124. For example, the weak structure can be a groove or similar groove provided on the surface of the pressure relief mechanism 124. The actions produced by the pressure relief mechanism 124 may include, but are not limited to: at least a portion of the pressure relief mechanism 124 ruptures, breaks, is torn, melts, or opens, etc. The emissions from the battery cell 12 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0170] In the above solution, since the pressure relief mechanism 124 is located at the end of the battery cell 12 opposite to the housing component 13 along the second direction Y, the risk of the battery cell 12 damaging the housing component 13 during pressure relief, leading to a rapid decrease in the structural stability of the battery device 100, can be reduced. Simultaneously, it reduces the risk of the housing component 13 obstructing the discharge of the battery cell 12, thus preventing poor pressure relief.

[0171] According to some embodiments of this application, referring to FIG1, this application provides a battery device 100, which includes the battery device 100 in one or more of the above embodiments.

[0172] In the above scheme, since the battery cell 12 in one or more of the above embodiments has high reliability, the power-consuming device including the battery device 100 in one or more of the above embodiments also has high reliability.

[0173] According to some embodiments of this application, referring to Figures 4-6, this application provides a battery device 100. The battery device 100 includes a housing component 13, two limiting members 14, and a plurality of battery cells 12. The two limiting members 14 are spaced apart along a first direction X. Each limiting member 14 includes a first end 141 and a second end 142 disposed opposite each other along a second direction Y. The first end 141 is connected to the housing component 13, and the second end 142 is a free end. The second direction Y intersects the first direction X. The housing component 13 is located below the battery cells 12 along the direction of gravity. The plurality of battery cells 12 are arranged along the first direction X and disposed between the two limiting members 14.

[0174] The battery cell 12 includes a housing 1212 and an end cap 1211. The housing 1212 has an opening, and the end cap 1211 closes the opening and is connected to the housing 1212 to form a connection portion. Along the second direction Y, the connection portion is located at one end of the battery cell 12 near the housing component 13.

[0175] The battery device 100 also includes a thermal management component 15 located between the battery cell 12 and the housing component 13 along the second direction Y. The thermal management component 15 is used to regulate the temperature of the battery cell 12.

[0176] Each battery cell 12 includes a positive terminal 1231 and a negative terminal 1232. Along the second direction Y, the positive terminal 1231 and negative terminal 1232 are located at one end of the battery cell 12 near the housing component 13. The positive terminal 1231 and negative terminal 1232 are spaced apart along the third direction Z. A thermal management component 15 is located between the positive terminal 1231 and negative terminal 1232. The third direction Z, the second direction Y, and the first direction X are all perpendicular to each other. The positive terminal 1231 of one of two adjacent battery cells 12 and the negative terminal 1232 of the other are located on the same side of the thermal management component 15.

[0177] The battery cell 12 has a first surface 125 facing the housing component 13. The first surface 125 includes a first end region 1251 and a second end region 1252. Along a third direction Z, a positive terminal 1231 and a negative terminal 1232 are disposed between the first end region 1251 and the second end region 1252. The battery device 100 also includes a first support member 16 and a second support member 17. The first support member 16 is disposed on the housing component 13 and contacts the first end region 1251, and the second support member 17 is disposed on the housing component 13 and contacts the second end region 1252.

[0178] The first support member 16, the first surface 125, the thermal management member 15, and the housing member 13 together define a first channel 18. The battery device 100 also includes a first busbar member disposed in the first channel 18, which is used to electrically connect two adjacent battery cells 12. The second support member 17, the first surface 125, the thermal management member 15, and the housing member 13 together define a second channel 19. The battery device 100 also includes a second busbar member disposed in the second channel 19, which is used to electrically connect two adjacent battery cells 12.

[0179] The limiting member 14 is provided with a first notch 20 extending along a first direction X, and the first notch 20 communicates with the first channel 18; the limiting member 14 is provided with a second notch 21 extending along the first direction X, and the second notch 21 communicates with the second channel 19. Each limiting member 14 includes a third end 143 and a fourth end 144 disposed opposite to each other along a third direction Z. The first notch 20 extends along a second direction Y to the first end 141, and the first notch 20 extends along a third direction Z to the third end 143; and / or, the second notch 21 extends along a second direction Y to the first end 141, and the second notch 21 extends along a third direction Z to the fourth end 144.

[0180] The battery cell 12 also includes a pressure relief mechanism 124. The positive terminal 1231 and the negative terminal 1232 of the battery cell 12 are disposed on the side opposite to the pressure relief mechanism 124. During the manufacturing of the battery cell 12, the pressure relief mechanism 124 is located on the lower side of the battery cell 12, and the positive terminal 1231 and the negative terminal 1232 are located on the upper side of the battery cell 12. During the assembly of the battery cell 12, the battery cell 12 is inverted and placed between the two limiting members 14. At this time, the pressure relief mechanism 124 is located on the upper side, and the positive terminal 1231 and the negative terminal 1232 are located on the lower side.

[0181] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This 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 device, characterized in that, include: Box components; Two limiting members are provided, which are spaced apart along a first direction, and the limiting members are connected to the housing component; Multiple battery cells, wherein the multiple battery cells are arranged along a first direction and disposed between the two limiting members; The plurality of battery cells include a first end battery cell located at one end along the first direction. The first end battery cell includes a first housing and a first end cap. The first housing has a first opening. The first end cap covers the first opening and is connected to the first housing to form a first connection portion. Along the first direction, the projection of the first connection portion at least partially overlaps with the limiting member.

2. The battery device according to claim 1, characterized in that, Each of the limiting members includes a first end and a second end disposed opposite to each other along a second direction, the first end being connected to the housing component, and the second direction intersecting the first direction; Along the second direction, the first connection portion is located at one end of the first end battery cell near the housing component.

3. The battery device according to claim 1 or 2, characterized in that, The plurality of battery cells include a second end battery cell located at the other end along the first direction. The second end battery cell includes a second housing and a second end cap. The second housing has a second opening. The second end cap covers the second opening and is connected to the second housing to form a second connection portion. In the same projection plane perpendicular to the first direction, the orthographic projection of the second connection portion at least partially overlaps with the limiting member.

4. The battery device according to claim 3, characterized in that, Each of the limiting members includes a first end and a second end disposed opposite to each other along a second direction, the first end being connected to the housing component, and the second direction intersecting the first direction; Along the second direction, the second connection portion is located at one end of the second end battery cell near the housing component.

5. The battery device according to any one of claims 1-4, characterized in that, The battery device further includes a thermal management component located between the battery cell and the housing component along a second direction. The thermal management component is used to regulate the temperature of the battery cell. The second direction intersects the first direction.

6. The battery device according to claim 5, characterized in that, The battery cell includes a positive terminal and a negative terminal. Along the second direction, the positive terminal and the negative terminal are disposed at one end of the battery cell near the housing component. The positive terminal and the negative terminal are spaced apart along a third direction. The thermal management component is located between the positive terminal and the negative terminal. The third direction, the second direction, and the first direction are perpendicular to each other.

7. The battery device according to claim 6, characterized in that, The positive terminal of one of two adjacent battery cells and the negative terminal of the other are located on the same side of the thermal management component.

8. The battery device according to claim 7, characterized in that, The battery cell has a first surface facing the housing component, the first surface including a first end region and a second end region, and along the third direction, the positive terminal and the negative terminal are disposed between the first end region and the second end region; The battery device also includes: A first support member is disposed on the housing member and contacts the first end region; and / or, The second support component is disposed on the housing component and contacts the second end region.

9. The battery device according to claim 8, characterized in that, The first support component, the first surface, the thermal management component, and the housing component together define a first channel. The battery device further includes a first busbar component disposed in the first channel, which is used to electrically connect two adjacent battery cells; and / or, The second support component, the first surface, the thermal management component, and the housing component together define a second channel. The battery device also includes a second busbar component disposed in the second channel, which is used to electrically connect two adjacent battery cells.

10. The battery device according to claim 8 or 9, characterized in that, The first support member extends along the first direction and contacts the plurality of battery cells; and / or, the second support member extends along the first direction and contacts the plurality of battery cells.

11. The battery device according to any one of claims 8-10, characterized in that, Along the second direction, the dimensions of the first support member are the same as those of the thermal management member; and / or, along the second direction, the dimensions of the second support member are the same as those of the thermal management member.

12. The battery device according to claim 9, characterized in that, The limiting member is provided with a first notch extending along the first direction, and the first notch communicates with the first channel; and / or The limiting member is provided with a second notch that extends through the first direction, and the second notch is connected to the second channel.

13. The battery device according to claim 12, characterized in that, Each of the limiting members includes a third end and a fourth end disposed opposite to each other along the third direction; The first gap extends along the second direction to the first end, and the first gap extends along the third direction to the third end; and / or, the second gap extends along the second direction to the first end, and the second gap extends along the third direction to the fourth end.

14. The battery device according to any one of claims 1-13, characterized in that, The battery cell is a square battery cell, and the surface of the battery cell in the first direction is the surface with the largest area in the battery cell.

15. The battery device according to any one of claims 1-14, characterized in that, The housing component is located below the battery cell along the direction of gravity.

16. The battery device according to claim 14, characterized in that, The limiting component is an end plate; The battery device also includes a housing for housing the individual battery cells; The box component is the bottom wall of the box.

17. The battery device according to any one of claims 1-16, characterized in that, Each of the limiting members includes a first end and a second end disposed opposite to each other along a second direction, the first end being connected to the housing component, and the second direction intersecting the first direction; The first end is connected to the housing component, and the second end is a free end.

18. The battery device according to any one of claims 1-17, characterized in that, The battery cell also includes a pressure relief mechanism, which is located at one end of the battery cell away from the housing component along a second direction, the second direction intersecting the first direction.

19. An electrical appliance, characterized in that, The battery device includes any one of claims 1-18, the battery device being used to provide electrical energy.

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