Battery cell, battery device and electric device

Abstract

The embodiment of the utility model provides a battery monomer, a battery device and a power utilization device, and belongs to the technical field of batteries. The battery cell includes: a case; the electrode assembly is arranged in the shell; the side supporting plate is clamped between the shell and the electrode assembly and comprises a first section and a second section connected to the end of the first section, the two sides of the first section abut against the electrode assembly and the shell respectively, and the second section abuts against the electrode assembly and is separated from the shell. Through the design that the first section of the side supporting plate is locally thickened, the fixing stability of the side supporting plate is enhanced, the risk that the side supporting plate falls off is reduced, the electrode assembly can be effectively supported, impact and damage to the electrode assembly in a vibration environment are remarkably reduced, the reliability of the single battery is improved, the service life of the battery device is prolonged, and the service life of the battery device is prolonged. In combination with the structural design that the second section retains the in-shell gap, smooth in-shell assembly of the electrode assembly is not interfered, and the production efficiency and the assembly precision are maintained.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery cell, a battery device, and an electrical device. Background Technology

[0002] In traditional battery designs, electrode assemblies are housed within the casing, typically positioned and supported by side supports. To facilitate easy installation and allow for necessary expansion space, a gap is usually maintained between the side supports and the casing sides. However, when individual battery cells are mounted laterally within the battery housing, this design can lead to the side supports loosening or even detaching under prolonged gravity or vibration, affecting the stability and safety of the individual cells. Furthermore, larger gaps can cause unnecessary impacts and damage to the electrode assemblies under vibration, impacting the performance and lifespan of the individual cells, and consequently shortening the overall lifespan of the battery system. Utility Model Content

[0003] This application provides a battery cell, a battery device, and an electrical device to enhance the fixation stability of the side support plate and reduce the impact and damage to the electrode assembly in a vibrating environment.

[0004] In a first aspect, embodiments of this application provide a single battery cell, comprising:

[0005] case;

[0006] Electrode assembly, disposed within the housing;

[0007] A side support plate is sandwiched between the housing and the electrode assembly, and includes a first segment and a second segment connected to the end of the first segment. The two sides of the first segment abut against the electrode assembly and the housing, respectively, and the second segment abuts against the electrode assembly and is separated from the housing.

[0008] In the above technical solution, the design of locally thickening the side support plate at the first section reduces the stress on the connection between the side support plate and other components, enhances the fixing stability of the side support plate, and reduces the risk of the side support plate falling off during use. At the same time, the thickened first section can effectively support the electrode assembly, limit the displacement of the electrode assembly under gravity or vibration, significantly reduce the impact and damage to the electrode assembly in the vibration environment, thereby improving the reliability of the battery cell and extending the service life of the battery device. Combined with the structural design of retaining the casing gap in the second section, it will not interfere with the smooth casing assembly process of the electrode assembly, maintaining production efficiency and assembly accuracy.

[0009] In some embodiments, the first segment includes a connected main body portion and a protrusion portion, the main body portion being connected to the second segment and abutting against the electrode assembly, and the protrusion portion protruding relative to the main body portion in a direction away from the electrode assembly and abutting against the housing.

[0010] In some embodiments, the protrusion has chamfered structures at both ends.

[0011] In some embodiments, both ends of the protrusion extend to both ends of the main body, and the two sides of the main body extend equidistantly beyond the two sides of the protrusion.

[0012] In some embodiments, the first segment forms a groove that is open toward the electrode assembly.

[0013] In some embodiments, the groove is provided with reinforcing ribs.

[0014] In some embodiments, the reinforcing ribs are spaced apart from the electrode assembly.

[0015] In some embodiments, the length L1 of the first segment and the length L2 of the side support plate satisfy: 1 / 3 ≤ L1 / L2 ≤ 2 / 3.

[0016] In some embodiments, the second segment is connected to both ends of the first segment.

[0017] Secondly, embodiments of this application provide a battery device, including: a plurality of battery cells as described above.

[0018] Thirdly, embodiments of this application provide an electrical device, including: a battery cell as described above or a battery device as described above, wherein the battery cell or the battery device is used to store or provide electrical energy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0021] Figure 2 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0022] Figure 3Exploded views of the structure of a single battery cell provided in some embodiments of this application;

[0023] Figure 4 This is one of the structural schematic diagrams of the side support plate provided in some embodiments of this application;

[0024] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0025] Figure 6 This is the second schematic diagram of the structure of the side support plate provided in some embodiments of this application;

[0026] Figure 7 for Figure 6 Enlarged view of the structure at point B;

[0027] Figure 8 This is the third schematic diagram of the structure of the side support plate provided in some embodiments of this application;

[0028] Figure 9 for Figure 8 A sectional view of section CC.

[0029] Figure label:

[0030] 1000 vehicles;

[0031] Battery device 100;

[0032] Box 10, first box body 11, second box body 12;

[0033] Battery cell 20, casing 21, electrode assembly 22;

[0034] Side support plate 23, first section 231, main body 2311, protrusion 2312, chamfered structure 23121, groove 2313, reinforcing rib 2315, second section 232;

[0035] Controller 200; Motor 300. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0038] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0042] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0043] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0044] Battery cells can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0045] A battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive current collector includes a current collector body and a positive electrode tab. The positive active material layer is coated on the surface of the current collector body, while the positive electrode tab is not coated with the positive active material layer and protrudes from the current collector body. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative current collector includes a current collector body and a negative electrode tab. The negative active material layer is coated on the surface of the current collector body, while the negative electrode tab is not coated with the negative active material layer and protrudes from the current collector body. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0046] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0047] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, including aircraft, rockets, space shuttles, and spacecraft. Individual battery cells are used to store or provide electrical energy.

[0048] The inventors discovered that there are some problems with the installation of electrode assemblies in existing battery cell structures. To allow for the insertion gap, a gap is generally left between the side support plate and the side of the casing. However, since battery cells are usually installed sideways inside the casing, the side support plate is prone to detaching from its original position when the battery cell is affected by gravity or external vibrations. At the same time, when the electrode assembly vibrates, the large gap can cause damage to the electrode assembly, affecting the performance and lifespan of the battery cell.

[0049] Based on the above considerations, in order to solve the problem that the side support plate is prone to falling off and the electrode assembly is easily damaged due to the excessive gap between the side support plate and the housing, the inventors have conducted in-depth research and designed a battery cell, including: a housing, an electrode assembly and a side support plate, wherein the electrode assembly is disposed inside the housing; the side support plate is sandwiched between the housing and the electrode assembly, and the side support plate includes a first section and a second section connected to the end of the first section, the two sides of the first section abut against the electrode assembly and the housing respectively, the second section abuts against the electrode assembly, and the second section is separated from the housing.

[0050] In this type of battery cell, by locally thickening the side support plate at the first section and retaining the gap for casing insertion at the second section, the original gap between the electrode assembly and the casing is filled without affecting the smooth installation of the electrode assembly. This effectively reduces the side support plate from falling off under gravity or vibration, improving the overall stability of the battery cell. At the same time, the thickened first section provides better support for the electrode assembly, significantly mitigating the impact and damage to the electrode assembly in a vibration environment, thereby improving the reliability of the battery cell and extending the battery's service life.

[0051] The battery device 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, which are connected in series, parallel, or mixed connections via a busbar.

[0052] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0053] 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 an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0054] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0055] 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.

[0056] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0057] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0058] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0059] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0060] The technical solutions described in this application are applicable to various electrical devices that use individual battery cells or battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. The battery device is used to store or provide electrical energy.

[0061] 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.

[0062] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0063] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0064] Please refer to Figure 2 , Figure 2This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which overlap each other, and together define an assembly space for accommodating the battery cells 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12, so that the first housing body 11 and the second housing body 12 together define the assembly space; alternatively, the first housing body 11 and the second housing body 12 may both be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0065] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0066] Please refer to Figure 2 The battery device 100 includes multiple rows of battery cells 20, which are arranged along a first direction. Each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction. The first direction and the second direction are the length direction and the width direction of the housing 10, respectively, and the first direction and the second direction are perpendicular to each other.

[0067] The technical solutions described in this application can also be applied to various energy storage devices that use individual battery cells or battery devices. These energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours.

[0068] According to some embodiments of this application, refer to Figure 3 This application provides a battery cell 20, including: a housing 21, an electrode assembly 22, and a side support plate 23. The electrode assembly 22 is disposed inside the housing 21; the side support plate 23 is sandwiched between the housing 21 and the electrode assembly 22, and the side support plate 23 includes a first segment 231 and a second segment 232 connected to the end of the first segment 231. The two sides of the first segment 231 abut against the electrode assembly 22 and the housing 21, respectively, and the second segment 232 abuts against the electrode assembly 22, and the second segment 232 is separated from the housing 21.

[0069] Reference Figure 3 Side support plates 23 are installed on both narrow sides of the electrode assembly 22 to support and protect the electrode assembly 22 as it is gradually inserted into the housing 21 along the length direction of the housing 21. The length direction of the side support plates 23 is parallel to the length direction of the housing 21, and both ends of the side support plates 23 extend out of the electrode assembly 22 to be fixedly connected to other components of the battery cell 20.

[0070] It should be noted that the battery cell 20 described in this application embodiment is a hard-shell battery cell 20, and since the wound electrode assembly 22 does not require the assistance of the side support plate 23 when it is inserted into the shell, the electrode assembly 22 described in this application embodiment is a stacked electrode assembly 22.

[0071] For example, refer to Figure 3 The battery cell 20 includes an electrode assembly 22, which is disposed within the housing 21.

[0072] In this embodiment, refer to Figure 3 and further refer to Figure 4 The side support plate 23 includes a first section 231 and two second sections 232 connected to both ends of the first section 231.

[0073] In other embodiments, the side support plate 23 includes a first segment 231 and a second segment 232 connected to one end of the first segment 231.

[0074] In some other embodiments, the side support plate 23 includes a plurality of first segments 231 and a plurality of second segments 232, at least some of the second segments 232 being located between two adjacent first segments 231.

[0075] Understandably, referring to Figure 3The side support plate 23 is composed of a first section 231 and a second section 232. Based on the fact that the two sides of the first section 231 abut against the electrode assembly 22 and the housing 21 respectively, the side support plate 23 is locally thickened at the position of the first section 231, which realizes the close contact between the first section 231, the housing 21 and the electrode assembly 22. On the one hand, it reduces the force on the connection position between the side support plate 23 and other components, enhances the fixation stability of the side support plate 23, and reduces the risk of the side support plate 23 falling off during use. On the other hand, the first section 231 can effectively support the electrode assembly 22, limit the displacement of the electrode assembly 22 under gravity or vibration, significantly reduce the impact and damage to the electrode assembly 22 in the vibration environment, thereby improving the reliability of the battery cell 20 and extending the service life of the battery device 100. Furthermore, since the second segment 232 abuts against the electrode assembly 22 and is separated from the housing 21, in other words, the second segment 232 is close to the electrode assembly 22 while maintaining a separation from the housing 21 to form an insertion gap. During the process of the electrode assembly 22 and the side support plate 23 entering the housing 21 together, the reasonable gap design of the second segment 232 not only helps the electrode assembly 22 to be smoothly inserted into the housing 21, maintaining production efficiency and assembly accuracy, but also makes up for the manufacturing tolerances of the electrode assembly 22 and the housing 21.

[0076] The battery cell 20 provided in this application embodiment, through the design of locally thickening the side support plate 23 at the first section 231, reduces the force on the connection position between the side support plate 23 and other components, enhances the fixing stability of the side support plate 23, and reduces the risk of the side support plate 23 falling off during use. At the same time, the thickened first section 231 can effectively support the electrode assembly 22, limit the displacement of the electrode assembly 22 under gravity or vibration, significantly reduce the impact and damage to the electrode assembly 22 in the vibration environment, thereby improving the reliability of the battery cell 20 and extending the service life of the battery device 100. Combined with the structural design of the second section 232 retaining the casing gap, it will not interfere with the smooth casing assembly process of the electrode assembly 22, maintaining production efficiency and assembly accuracy.

[0077] According to some embodiments of this application, refer to Figure 3 and further refer to Figure 4 The first segment 231 includes a connected main body 2311 and a protrusion 2312. The main body 2311 is connected to the second segment 232 and abuts against the electrode assembly 22. The protrusion 2312 protrudes relative to the main body 2311 in a direction away from the electrode assembly 22 and abuts against the housing 21.

[0078] In this embodiment, refer to Figure 3 and further refer to Figure 4The first segment 231 and the main body 2311 are connected and matched in size and shape, forming the inner surface of the side support plate 23 for contact with the electrode assembly 22. This makes the inner surface of the side support plate 23 flat and continuous, and evenly attached to the side of the electrode assembly 22, which helps the electrode assembly 22 to be evenly stressed. The protrusion 2312 is connected to the side of the main body 2311 facing away from the electrode assembly 22, realizing the contact of the first segment 231 with the housing 21.

[0079] The protrusion 2312 can be designed as a strip or a block, and the specific size of the protrusion 2312 can be designed according to actual needs. This application does not limit this.

[0080] For example, in some embodiments, the thickness of the protrusion 2312 is greater than the thickness of the main body 2311.

[0081] For example, in some other embodiments, the thickness of the protrusion 2312 is equal to the thickness of the main body 2311.

[0082] For example, in some other embodiments, the thickness of the protrusion 2312 is less than the thickness of the main body 2311.

[0083] The battery cell 20 provided in this application embodiment, through the above-mentioned structural design of the first segment 231 consisting of the main body 2311 and the protrusion 2312, on the one hand, the first segment 231 and the main body 2311 together form the inner surface of the side support plate 23 for abutting against the electrode assembly 22, making the inner surface of the side support plate 23 flat and continuous, and uniformly covering the side of the electrode assembly 22, which helps the electrode assembly 22 to be evenly stressed, thereby reducing the wear of the side support plate 23 on the electrode assembly 22. On the other hand, the protrusion 2312 can realize the abutment of the first segment 231 against the housing 21, thereby reducing the shaking of the electrode assembly 22 inside the housing 21, protecting the structural integrity of the electrode assembly 22. At the same time, it is only necessary to shape the protrusion shape on the existing side support plate 23 structure to form the protrusion 2312, without complex processing technology, which is conducive to promotion and use.

[0084] According to some embodiments of this application, refer to Figure 4 and further refer to Figure 5 The two ends of the protrusion 2312 are provided with chamfered structures 23121.

[0085] Among them, the chamfer structure 23121 refers to changing the original right angle or acute angle edge shape by cutting off material at a certain angle at the edge of the protrusion 2312.

[0086] Specifically, the chamfer structure 23121 can be a C-angle (sloping surface) or an R-angle (smooth transition surface), and this application does not limit it in this regard.

[0087] For example, refer to Figure 4 and further refer to Figure 5 The chamfered structure 23121 is a C-angle, meaning that both ends of the protrusion 2312 form guide slopes.

[0088] In actual implementation, the required chamfer structure 23121 can be formed at both ends of the protrusion 2312 during the processing of the protrusion 2312 through machining (such as milling, grinding) or forming processes (such as injection molding, die casting). The size of the chamfer (i.e., the angle and depth of the cut) can be adjusted according to actual needs to both satisfy the guiding function and not affect the overall strength and function of the protrusion 2312.

[0089] Understandably, due to the guiding effect of the chamfered structure 23121, on the one hand, during the assembly of the battery cell 20, relevant operators do not need to spend too much time and effort adjusting the docking position of the protrusion 2312 and the housing 21. They can quickly and accurately install the combination of the side support plate 23 and the electrode assembly 22 into the housing 21, reducing assembly difficulties caused by misalignment or tilting. This greatly shortens the assembly time of a single battery cell 20 and improves the assembly efficiency on the production line. On the other hand, it reduces the scraping between the protrusion 2312 and the housing 21 when the battery cell is inserted into the housing. This effectively protects the structural integrity of the side support plate 23 and the housing 21, while reducing the entry of debris and other impurities generated by friction into the interior of the housing 21. This avoids the potential threat of debris and other impurities generated by scratches to other internal components, thereby improving the overall quality and reliability of the battery cell 20.

[0090] The battery cell 20 provided in this application embodiment, through the above-mentioned chamfered structure 23121, makes it easier for the protrusion 2312 to find the correct mating position during the casing process, reducing assembly difficulties caused by misalignment or skewness, greatly shortening the assembly time of the battery cell 20, improving the assembly efficiency on the production line, and reducing the scraping between the protrusion 2312 and the casing 21 during casing insertion. This effectively protects the structural integrity of the side support plate 23 and the casing 21, while reducing the entry of debris and other impurities generated by friction into the casing 21, thereby improving the overall quality and reliability of the battery cell 20.

[0091] According to some embodiments of this application, refer to Figure 4 Both ends of the protrusion 2312 extend to both ends of the main body 2311, and the two sides of the main body 2311 extend equidistantly beyond the two sides of the protrusion 2312.

[0092] Understandably, given that both ends of the protrusion 2312 extend to both ends of the main body 2311, and considering that the side support plate 23 is a long strip structure, the first segment 231 is in close contact with the shell 21 along its entire length, providing comprehensive support to the main body in the length direction as much as possible, thereby reducing the risk of the side support plate 23 falling off due to local stress concentration. Furthermore, based on the fact that the two sides of the main body 2311 extend equidistantly beyond the two sides of the protrusion 2312, firstly, the main body 2311 extends beyond the protrusion 2312 on both sides in the width direction, forming a through-channel after insertion into the shell, providing more possibilities for heat dissipation and pressure regulation inside the battery cell 20, thus helping to optimize the overall performance of the battery cell 20; secondly, the equidistant design of the extended portions on both sides makes the first segment 231 highly symmetrical in its structure, enabling uniform stress distribution, thereby helping to reduce stress concentration and deformation caused by structural asymmetry, and thus reducing damage to the side support plate 23 and electrode assembly 22 under external disturbances.

[0093] The battery cell 20 provided in this application extends both ends of the protrusion 2312 to both ends of the main body 2311, so that the first segment 231 is in close contact with the housing 21 along its entire length. This reduces the risk of the side support plate 23 falling off due to local stress concentration. Combined with the design that the two sides of the main body 2311 extend equidistantly beyond the two sides of the protrusion 2312, the structural symmetry of the side support plate 23 is increased, effectively reducing stress concentration and deformation, thereby increasing the stability and reliability of the side support plate 23 and the electrode assembly 22 inside the housing 21.

[0094] According to some embodiments of this application, refer to Figure 3 and further refer to Figure 6 The first segment 231 forms a groove 2313 that is open toward the electrode assembly 22.

[0095] The shape of the groove 2313 can be rectangular, circular, elliptical, trapezoidal or other shapes, and this application does not limit it.

[0096] For example, refer to Figure 4 and further refer to Figure 6 The shape of the groove 2313 is designed to match the outer contour shape of the protrusion 2312. Specifically, since the two ends of the protrusion 2312 are provided with chamfered structures 23121 and the chamfered structures 23121 are C-angles, the outer contour of the protrusion 2312 is roughly an isosceles trapezoid. Correspondingly, the groove 2313 is also designed as an isosceles trapezoidal groove, so that the wall thickness of the protrusion 2312 can be as uniform as possible.

[0097] In actual design, the size of the groove 2313 can be determined according to the required amount of electrolyte, the size of the electrode assembly 22 and the overall structure of the battery cell 20. This application does not limit this.

[0098] For example, in some embodiments, the depth of the groove 2313 is equal to the thickness of the protrusion 2312, so that the wall thickness of the first segment 231 and the wall thickness of the second segment 232 are as equal as possible.

[0099] Understandably, by forming a groove 2313 in the first segment 231, on the one hand, the electrolyte storage space inside the battery cell 20 is significantly increased. Sufficient electrolyte helps the smooth transport of ions during charging and discharging, thereby improving the charging and discharging efficiency and cycle life of the battery device 100. On the other hand, the presence of the groove 2313 makes the electrolyte distribution inside the casing 21 more uniform, reduces the resistance during electrolyte injection, improves the electrolyte wetting efficiency, and allows the electrolyte to contact the electrode assembly 22 more fully, promoting the chemical reaction between the electrode and the electrolyte, reducing local polarization of the electrode, and improving the overall performance and consistency of the battery device 100. Furthermore, the hollow design of the first segment 231 can reduce the weight of the side support plate 23, thereby reducing the weight of the entire battery cell 20, and thus achieving a lightweight design of the entire battery device 100.

[0100] The battery cell 20 provided in this application embodiment, through the above-described structural design of forming a groove 2313 in the first segment 231, significantly increases the electrolyte storage space inside the battery cell 20, improves the charge and discharge efficiency and cycle life of the battery device 100, and at the same time makes the electrolyte distribution inside the casing 21 more uniform, improves the electrolyte wetting efficiency, reduces the local polarization phenomenon of the electrode, improves the overall performance and consistency of the battery device 100, and can reduce the weight of the side support plate 23 itself, realizing the lightweight design of the entire battery device 100.

[0101] According to some embodiments of this application, refer to Figure 6 and further refer to Figure 7 The groove 2313 is provided with reinforcing ribs 2315.

[0102] The reinforcing rib 2315 may extend along the length direction of the shell 21, or along the thickness direction of the shell 21, or in other directions. This application does not limit this.

[0103] The reinforcing rib 2315 can be set one or more, where multiple means two or more. Multiple reinforcing ribs 2315 can be arranged in parallel, or arranged in a grid pattern, or designed into other shapes. This application does not limit this.

[0104] Understandably, since the first segment 231 is hollowed out to form a groove 2313, its structural strength is significantly weakened compared to a solid structure. Therefore, to support and reinforce the first segment 231, reinforcing ribs 2315 are provided within the groove 2313. On the one hand, the design of the reinforcing ribs 2315 significantly enhances the strength of the bottom and sides of the groove 2313, enabling the first segment 231 to withstand greater mechanical stress and electrolyte pressure, which helps reduce the probability of deformation or breakage of the first segment 231 during the charging and discharging process of the battery device 100. On the other hand, the arrangement of the reinforcing ribs 2315 can affect the flow and distribution of the electrolyte. By rationally designing the shape and position of the reinforcing ribs 2315, the distribution of the electrolyte can be further optimized, thereby improving the charging and discharging efficiency and capacity utilization of the battery device 100. Furthermore, the addition of the reinforcing ribs 2315 makes the structure of the entire battery cell 20 more stable. Under vibration or impact conditions, the reinforcing ribs 2315 can provide better support and fixation, reducing the deformation and displacement of the battery cell 20.

[0105] According to some embodiments of this application, refer to Figure 3 and further refer to Figure 9 The reinforcing ribs 2315 are spaced apart from the electrode assembly 22.

[0106] In other words, refer to Figure 9 The height of the reinforcing rib 2315 is lower than the depth of the groove 2313. In this case, a certain safety gap can be reserved between the reinforcing rib 2315 and the electrode assembly 22.

[0107] In actual implementation, due to the aforementioned safety gap design, even with certain operational errors during the production and assembly of the battery cell 20, accidental contact between the reinforcing rib 2315 and the electrode assembly 22 will not cause physical damage to the electrode assembly 22, thus improving the initial performance and quality of the battery cell 20. During long-term use of the battery cell 20, internal thermal expansion and contraction due to charging and discharging may cause slight displacement changes that could lead to deformation of the electrode assembly 22 due to pressure on the side support plate 23. The safety gap provides space for this deformation, thus minimizing scratches or pressure damage to the electrode assembly 22 caused by the reinforcing rib 2315 during battery cell 20 assembly or use, effectively protecting the integrity of the electrode assembly 22. Furthermore, the spacing of the reinforcing rib 2315 from the electrode assembly 22 provides a smoother channel for the electrolyte. Specifically, the electrolyte can flow freely within the groove 2313, ensuring full contact with the electrode assembly 22, thereby improving the charging and discharging efficiency and energy density of the battery device 100.

[0108] The battery cell 20 provided in this application embodiment, through the layout design of the reinforcing ribs 2315 and the electrode assembly 22 being spaced apart, can reserve a certain safety gap between the reinforcing ribs 2315 and the electrode assembly 22, thereby minimizing the scratches or pressure damage to the electrode assembly 22 caused by the reinforcing ribs 2315 during the assembly or use of the battery cell 20, thus effectively protecting the integrity of the electrode assembly 22, and providing a smoother channel for the electrolyte, which helps to achieve uniform distribution of the electrolyte, thereby improving the charging and discharging efficiency and energy density of the battery device 100.

[0109] According to some embodiments of this application, refer to Figure 8 The length L1 of the first segment 231 and the length L2 of the side support plate 23 satisfy: 1 / 3≤L1 / L2≤2 / 3.

[0110] Specifically, L1 / L2 can be 1 / 3, 5 / 12, 1 / 2, 15 / 24, 2 / 3, or other values ​​between 1 / 3 and 2 / 3, without limitation here.

[0111] It should be noted that if L1 / L2 is too small, the side support plate 23 will not provide sufficient support when the battery cell 20 is subjected to vibration or impact, and the electrode assembly 22 will be difficult to be effectively supported and will easily shake inside the housing 21. If L1 / L2 is too large, the first section 231 will occupy too much space, which will hinder the assembly of the electrode assembly 22 and the side support plate 23 when it is inserted into the housing, increase the assembly difficulty, waste materials, and increase production costs.

[0112] The battery cell 20 provided in this application embodiment, by limiting L1 / L2 to between 1 / 3 and 2 / 3, ensures that the first segment 231 has sufficient length to provide stable support, thereby minimizing the risk of displacement or damage to the electrode assembly 22 under vibration or gravity, while also maintaining ease of assembly and improving production efficiency. In addition, it can reduce unnecessary material usage, thereby reducing the manufacturing cost of the battery device 100.

[0113] According to some embodiments of this application, refer to Figure 4 and further refer to Figure 8 The first segment 231 is connected to the second segment 232 at both ends.

[0114] In this embodiment, refer to Figure 4 and further refer to Figure 8 Both ends of the first segment 231 are connected to a second segment 232 of the same length. In this case, the protrusion 2312 is located in the middle of the entire side support plate 23 along the length direction, so that the structure of the side support plate 23 presents good symmetry.

[0115] Understandably, by providing second sections 232 at both ends of the first section 231, the supporting force on the electrode assembly 22 can be evenly distributed on both sides when the battery cell 20 is subjected to various external forces, effectively alleviating the problem of local stress concentration that may be caused by unilateral force. During long-term use, the electrode assembly 22 and the side support plate 23 will not suffer fatigue damage due to continuous high pressure on one section. For example, when the volume of the electrode assembly 22 changes due to frequent charging and discharging, the second sections 232 at both ends can synchronously buffer and support, thereby extending the service life of the electrode assembly 22 and the side support plate 23 and reducing the failure rate of the battery device 100. In addition, due to the presence of the second sections 232, the two ends of the side support plate 23 are reserved with insertion gaps into the housing. In this way, the side support plate 23 can be inserted into the housing 21 from either end without affecting the assembly smoothness. Relevant operators do not need to spend time identifying it, realizing the foolproof design of the side support plate 23, thereby simplifying the assembly process and accelerating production efficiency.

[0116] The battery cell 20 provided in this embodiment features a design where both ends of the first segment 231 are connected to the second segment 232. This design allows the supporting force on the electrode assembly 22 to be evenly distributed on both sides, effectively mitigating the problem of localized stress concentration that may result from unilateral stress. This extends the service life of the electrode assembly 22 and the side support plate 23, thereby reducing the failure rate of the battery device 100. Furthermore, the presence of the second segment 232 provides pre-reserved insertion gaps at both ends of the side support plate 23, eliminating the need for time-consuming identification by relevant personnel. This achieves a foolproof design for the side support plate 23, simplifying the assembly process and accelerating the production efficiency of the battery device 100.

[0117] According to some embodiments of this application, this application also provides a battery device 100, which includes a plurality of battery cells 20 of any of the above embodiments.

[0118] According to some embodiments of this application, this application also provides an electrical device. The electrical device includes a battery cell 20 of any of the above embodiments, the battery cell 20 being used to store or provide electrical energy; or the electrical device includes a battery device 100 of any of the above embodiments, the battery device 100 being used to store or provide electrical energy.

[0119] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0120] According to some embodiments of this application, see Figures 3-9As shown, this application provides a battery cell 20, including: a housing 21, an electrode assembly 22, and a side support plate 23. The electrode assembly 22 is disposed within the housing 21; the side support plate 23 is sandwiched between the housing 21 and the electrode assembly 22, and the side support plate 23 includes a first segment 231 and a second segment 232 connected to the end of the first segment 231. The two sides of the first segment 231 abut against the electrode assembly 22 and the housing 21, respectively, and the second segment 232 abuts against the electrode assembly 22, and the second segment 232 is separated from the housing 21. The first segment 231 includes a connected main body portion 2311 and a protrusion portion 2312. The main body portion 2311 is connected to the second segment 232, and the main body portion 2311 abuts against the electrode assembly 22. The protrusion portion 2312 protrudes relative to the main body portion 2311 in a direction away from the electrode assembly 22, and the protrusion portion 2312 abuts against the housing 21. Both ends of the protrusion portion 2312 are provided with chamfered structures 23121. Both ends of the protrusion 2312 extend to both ends of the main body 2311, and the distances by which the two sides of the main body 2311 extend beyond the two sides of the protrusion 2312 are equal. The first segment 231 forms a groove 2313 that is open toward the electrode assembly 22. A reinforcing rib 2315 is provided in the groove 2313. The reinforcing rib 2315 is spaced apart from the electrode assembly 22. The length L1 of the first segment 231 and the length L2 of the side support plate 23 satisfy: 1 / 3 ≤ L1 / L2 ≤ 2 / 3. Both ends of the first segment 231 are connected to a second segment 232.

[0121] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0122] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0123] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, characterized by, The battery cell comprises: a shell; an electrode assembly arranged in the shell; a side support plate clamped between the shell and the electrode assembly, and comprising a first section and a second section connected to an end of the first section, two sides of the first section abutting the electrode assembly and the shell respectively, and the second section abutting the electrode assembly and being spaced apart from the shell.

2. The battery cell of claim 1, wherein, The first section comprises a main body portion and a protruding portion connected to each other, the main body portion is connected to the second section and abuts the electrode assembly, and the protruding portion protrudes relative to the main body portion in a direction away from the electrode assembly and abuts the shell.

3. The battery cell of claim 2, wherein, Both ends of the protruding portion are provided with chamfered structures.

4. The battery cell of claim 2, wherein, Both ends of the protruding portion extend to both ends of the main body portion, and the distance by which the two sides of the main body portion exceed the two sides of the protruding portion is equal.

5. The battery cell of any one of claims 1-4, wherein, The first section forms a groove arranged open towards the electrode assembly.

6. The battery cell of claim 5, wherein, A reinforcing rib is arranged in the groove.

7. The battery cell of claim 6, wherein, The reinforcing rib is distributed in a spaced-apart manner from the electrode assembly.

8. The battery cell of any one of claims 1-4, wherein, The length L1 of the first section and the length L2 of the side support plate satisfy: 1 / 3≤L1 / L2≤2 / 3.

9. The battery cell of any one of claims 1-4, wherein, Both ends of the first section are connected with the second section.

10. A battery device characterized by comprising: The battery device comprises: a plurality of battery cells as claimed in any one of claims 1-9.

11. An electrical device, comprising: The battery cell or the battery device as claimed in any one of claims 1-9 or 10 is used for storing or providing electric energy. ​

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