Gasket, battery and electric device

Abstract

The embodiment of the application provides a pressing strip, a battery and an electric device, and belongs to the technical field of batteries. The pressing strip comprises a pressing strip body, the pressing strip body forms a mounting groove; a joint is connected to both ends of the pressing strip body, the joint comprises a main body section connected with the pressing strip body and an assembly section used for being connected with a box body of the battery, and at least part of the main body section is mounted in the mounting groove. Through the arrangement of the pressing strip body and the joint, the pressing strip is adapted to the battery monomer and the box body at the same time, the insulation requirement of the pressing strip body when being attached to the battery monomer is met, the probability of causing serious safety accidents due to electric leakage is reduced, the safety protection performance of the whole battery is optimized, the strength requirement of the joint when being connected with the box body is met, the fracture of the pressing strip caused by the battery under the working condition of large external disturbance is prevented, and the reliability of the connection among the pressing strip, the battery monomer and the box body is improved.

Description

Technical Field

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

[0002] During the assembly of battery cells, multiple battery cells are typically pressed together with the housing using a pressure strip. In related technologies, the entire pressure strip is manufactured using an integrated molding process, directly pressing the pressure strip onto the battery cell. Then, the two ends of the pressure strip are locked to the housing using bolts. However, the integrated molding pressure strip cannot simultaneously meet the insulation requirements of the battery cell and the strength requirements of the bolt connection, which seriously affects the reliability of the connection between the pressure strip and the housing or the battery cell. Summary of the Invention

[0003] This application provides a pressure strip, a battery, and an electrical device to meet the insulation requirements of the pressure strip body when it is attached to the battery cell, thereby improving the overall safety protection performance of the battery. At the same time, it meets the strength requirements of the joint when connected to the housing, thereby improving the reliability of the connection between the pressure strip, the battery cell, and the housing.

[0004] In a first aspect, embodiments of this application provide a pressure strip applied to a battery, comprising:

[0005] The pressure strip body forms an installation groove;

[0006] The connector is provided at both ends of the pressure strip body. The connector includes a main body section connected to the pressure strip body and an assembly section for connecting to the battery housing. At least a portion of the main body section is installed in the mounting groove.

[0007] In the above technical solution, by setting up the pressure strip body and the connector, compared with the traditional one-piece molding solution, the pressure strip can be adapted to both the battery cell and the housing at the same time, which greatly improves the insulation performance of the pressure strip body and meets the insulation requirements of the pressure strip body when it is attached to the battery cell. This reduces the probability of serious safety accidents caused by leakage, thereby optimizing the overall safety protection performance of the battery. At the same time, it meets the strength requirements of the connector when connected to the housing, realizing a high-strength connection between the connector and the housing. This prevents the pressure strip from breaking under conditions of large external disturbances, thereby improving the reliability of the connection between the pressure strip, the battery cell and the housing.

[0008] In some embodiments, the thickness of the main body segment is less than the depth of the mounting groove, and the main body segment is connected to the bottom of the mounting groove.

[0009] In some embodiments, the main body segment and the mounting groove are connected by adhesive.

[0010] In some embodiments, both ends of the pressure strip body are provided with clearance notches on the side opposite to the mounting groove.

[0011] In some embodiments, the dimension of the main body segment along the width direction of the pressure strip body is smaller than the dimension of the assembly segment along the width direction.

[0012] In some embodiments, the strip further includes:

[0013] A first buffer element is installed in the mounting slot and is separated from the connector.

[0014] In some embodiments, the first buffer member is connected to the pressure strip body and the joint by adhesive.

[0015] In some embodiments, the strip further includes:

[0016] A connecting strip, the two ends of which are connected to the main body section, the connecting strip is connected to the pressure strip body, and the connecting strip is installed in the mounting groove.

[0017] In the above technical solution, the connection between the pressure strip body, the joint and the connecting strip are realized through the setting of the connecting strip. Using this structure significantly enhances the shear resistance of the joint, reduces the probability of structural adhesive falling off the joint and the pressure strip body under stress, and further strengthens the overall structure of the pressure strip. At the same time, in conjunction with the design of the positioning structure, the assembly accuracy between the joint, the pressure strip body and the connecting strip is improved.

[0018] In some embodiments, the connecting strip is bonded to the pressure strip body by adhesive.

[0019] In some embodiments, a portion of the connecting strip is stacked and connected to the main body segment.

[0020] In some embodiments, the surface of the connecting strip connected to the bottom of the mounting groove is flush with the surface of the main body segment connected to the bottom of the mounting groove.

[0021] In the above technical solution, by setting the surface of the connecting strip connected to the bottom of the mounting groove to be flush with the surface of the main body connected to the bottom of the mounting groove, the gap between the connecting strip and the pressure strip body is avoided by using reasonable deformation of the structure, which effectively reduces the amount of structural adhesive used and achieves cost control. At the same time, the overall weight of the pressure strip is reduced, achieving a lightweight design, thereby improving the energy density of the entire battery.

[0022] In some embodiments, the connecting strip includes a first connecting segment, a first curved segment, and a second connecting segment. The first connecting segment is connected to both ends of the second connecting segment, and the curved segment is connected between the first connecting segment and the second connecting segment. The first connecting segment fits into the connector and is located on the side of the connector opposite to the pressure strip body. The second connecting segment fits into the pressure strip body, and the surface of the second connecting segment connected to the bottom of the mounting groove is flush with the surface of the main body segment connected to the bottom of the mounting groove.

[0023] In some embodiments, the main body segment includes a first joint segment, a second curved segment, and a second joint segment connected in sequence. The first joint segment is attached to the connecting strip and is located on the side of the connecting strip opposite to the pressure strip body. The second joint segment is attached to the pressure strip body. The surface of the connecting strip connected to the bottom of the mounting groove is flush with the surface of the second joint segment connected to the bottom of the mounting groove.

[0024] In some embodiments, the minimum thickness H1 of the connecting strip satisfies: 0.1mm ≤ H1 ≤ 50mm.

[0025] In some embodiments, the length L of the connector satisfies: 10mm≤L≤3000mm.

[0026] In some embodiments, the minimum thickness H2 of the joint satisfies: H2≥0.5mm.

[0027] Secondly, embodiments of this application provide a battery, comprising:

[0028] The housing defines a receiving cavity;

[0029] Multiple battery cells are installed in the receiving cavity;

[0030] Multiple pressure strips as described above are mounted on the surface of the multiple battery cells and connected to the housing.

[0031] Thirdly, embodiments of this application provide an electrical device, including:

[0032] The battery mentioned above. Attached Figure Description

[0033] 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.

[0034] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0035] Figure 2 Exploded views of the battery structure provided in some embodiments of this application;

[0036] Figure 3 One of the partial structural schematic diagrams of a battery provided in some embodiments of this application;

[0037] Figure 4 This is a second partial structural schematic diagram of a battery provided in some embodiments of this application;

[0038] Figure 5 This is one of the exploded views of the structure of the pressure strip provided in some embodiments of this application;

[0039] Figure 6 This is one of the partial structural schematic diagrams of the pressure strip provided in some embodiments of this application;

[0040] Figure 7 This is the second exploded view of the structure of the pressure strip provided in some embodiments of this application;

[0041] Figure 8 A second partial structural schematic diagram of the pressure strip provided in some embodiments of this application;

[0042] Figure 9 This is the third partial structural schematic diagram of the pressure strip provided in some embodiments of this application.

[0043] Figure label:

[0044] Vehicle 1, Motor 20, Controller 30;

[0045] Battery 10;

[0046] Box 11, battery cell 12;

[0047] Pressure strip 13, pressure strip body 131, mounting groove 1311, clearance notch 1312, joint 132, main body section 1321, first joint section 13211, second joint section 13212, second bending section 13213, assembly section 1322, connecting strip 133, first connecting section 1331, second connecting section 1332, first bending section 1333, first buffer member 135.

[0048] Bottom guard plate 14. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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).

[0055] The battery cells mentioned in the embodiments of this application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these types either.

[0056] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a housing for encapsulating one or more battery cells or multiple battery modules. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0057] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists 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 plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of 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 active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative 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.

[0058] 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.

[0059] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. A battery consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, the battery faces high requirements in terms of both safety and cycle life.

[0060] The inventors discovered that in general power batteries, in order to stably and almost immobilize multiple battery cells within the casing, a clamping strip is typically used to press the battery cells to the casing. In related technologies, the entire clamping strip is manufactured using an integrated molding process, directly pressing the clamping strip onto the battery cells, and then bolting both ends of the clamping strip to the casing. However, the integrated molding of the clamping strip cannot simultaneously meet the insulation requirements of the battery cells and the strength requirements of the bolted connection, which severely affects the reliability of the connection between the clamping strip and the casing or the battery cells. Specifically, when the clamping strip is made of insulating material, although it can demonstrate superior insulation performance in the connection with the battery cells, its strength in the bolted connection with the casing is too low, making it prone to breakage.

[0061] Based on the above considerations, in order to solve the problem that the integrally molded pressure strip cannot be adapted to both the battery cell and the casing at the same time, the inventors, after in-depth research, designed a battery for use in batteries. The battery includes: a pressure strip body and a connector. The pressure strip body forms an installation groove. Both ends of the pressure strip body are connected to the connector. The connector includes a main body section connected to the pressure strip body and an assembly section for connecting to the battery casing. At least a portion of the main body section is installed in the installation groove.

[0062] In this type of battery structure, the pressure strip is designed as a separate structure consisting of the pressure strip body and the connector. This structure has two advantages: firstly, the pressure strip body is made of insulating material and is attached to the battery cell, thereby reducing the probability of serious safety accidents caused by leakage and optimizing the overall safety performance of the battery; secondly, the connector is made of high-strength material, achieving a high-strength connection between the connector and the housing, preventing the pressure strip from breaking under conditions of large external disturbances, and thus improving the reliability of the connection between the pressure strip, the battery cell, and the housing.

[0063] The battery disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system comprising the electrical device can be constructed using the battery thermal management system and battery disclosed in this application. This improves the applicability of the battery thermal management system and reduces its assembly difficulty.

[0064] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] For ease of explanation, the following embodiments will be described using a vehicle 1 as an example of an electrical device according to an embodiment of this application.

[0066] like Figure 1 The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-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. A motor 20, a controller 30, and a battery 10 can be installed inside vehicle 1. The controller 30 controls the battery 10 to supply power to the motor 20. For example, the battery 10 can be installed at the bottom, front, or rear of vehicle 1. The battery 10 can be used to power vehicle 1; for example, it can serve as the operating power source for the vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0067] To meet different power needs, the battery 10 may include multiple battery cells 12, which may be connected in series, in parallel, or in a mixed manner. A mixed connection refers to a combination of series and parallel connections.

[0068] like Figure 2 The diagram shown is an exploded view of the structure of a battery 10 according to an embodiment of this application. The battery 10 includes a housing 11 and a plurality of battery cells 12, which are housed within the housing 11. The housing 11 provides assembly space for the battery cells 12, and can have various structures. In some embodiments, the housing 11 can be an open structure. Specifically, the battery 10 may also include a bottom protective plate 14. The housing 11 may define a receiving cavity with an opening facing downwards. The plurality of battery cells 12 can be installed within the receiving cavity. The bottom protective plate 14 may be connected to the housing 11 and may be used to seal the receiving cavity.

[0069] In other embodiments, the housing 11 can be a closed structure, comprising a first housing body and a second housing body, which overlap each other, jointly defining an assembly space for accommodating the battery cell 12. The second housing body can be a hollow structure open at one end, while the first housing body can be a plate-like structure, covering the open side of the second housing body to jointly define the assembly space. Alternatively, both the first and second housing bodies can be hollow structures open on one side, with the open side of the first housing body covering the open side of the second housing body. Of course, the housing 11 formed by the first and second housing bodies can be of various shapes, such as a cylinder, a cuboid, etc.

[0070] In battery 10, multiple battery cells 12 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 12 are connected in both series and parallel configurations. Multiple battery cells 12 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 12 is housed within housing 11. Alternatively, battery 10 can also consist of multiple battery cells 12 first connected in series, parallel, or in a mixed configuration to form a battery module, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within housing 11. Battery 10 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 12.

[0071] According to some embodiments of this application, such as Figures 5-9 As shown, this application provides a pressure strip 13 applied to a battery 10. The pressure strip 13 includes a pressure strip body 131 and a connector 132. The pressure strip body 131 forms a mounting groove 1311; both ends of the pressure strip body 131 are connected to connectors 132. The connector 132 includes a main body section 1321 connected to the pressure strip body 131 and an assembly section 1322 for connecting to the casing 11 of the battery 10. At least a portion of the main body section 1321 is installed in the mounting groove 1311.

[0072] The pressure strip body 131 may be made of insulating material, which may include, but is not limited to, polyvinyl chloride, polyethylene, polystyrene, polytetrafluoroethylene or polycarbonate, etc., without limitation.

[0073] The cross-sectional shape of the pressure strip body 131 can be U-shaped, H-shaped, or I-shaped, etc., and there is no limitation here. For example, in some embodiments, the cross-sectional shape of the pressure strip body 131 is U-shaped.

[0074] The connector 132 may be made of metal, including but not limited to stainless steel, aluminum alloy or titanium alloy, etc., without limitation.

[0075] In actual implementation, such as Figures 2-9 As shown, during the assembly process of the pressure strip 13, the main body section 1321 of the connector 132 can be connected to both ends of the pressure strip body 131 by adhesive or other means. The pressure strip body 131 can be attached to the surface of multiple battery cells 12. The groove of the mounting groove 1311 can face away from the battery cell 12. The assembly section 1322 of the connector 132 can protrude towards the housing 11. The assembly section 1322 can be provided with at least one connection hole for connecting to the housing 11.

[0076] Specifically, such as Figures 2-4 As shown, the assembly section 1322 of the connector 132 located at one end of the pressure strip body 131 can be connected to the front beam of the box body 11, and the assembly section 1322 of the connector 132 located at the other end of the pressure strip body 131 can be connected to the rear beam of the box body 11.

[0077] The connection method between the connection hole of the assembly section 1322 and the housing 11 includes, but is not limited to, bolt connection, riveting connection or FDS (Flow Drill Screw) connection, etc. There is no limitation here. For example, in some embodiments, the connection method between the connection hole of the assembly section 1322 and the housing 11 is bolt connection.

[0078] The pressure strip 13 provided in this embodiment, through the setting of the pressure strip body 131 and the connector 132, compared with the traditional one-piece molding scheme of the pressure strip 13, realizes that the pressure strip 13 can simultaneously adapt to the battery cell 12 and the housing 11, greatly improves the insulation performance of the pressure strip body 131, meets the insulation requirements of the pressure strip body 131 when it is attached to the battery cell 12, thereby reducing the probability of serious safety accidents caused by leakage, and thus optimizing the safety protection performance of the entire battery 10. At the same time, it meets the strength requirements of the connector 132 when connected to the housing 11, realizes a high-strength connection between the connector 132 and the housing 11, prevents the pressure strip 13 from breaking under the condition of large external disturbance of the battery 10, thereby improving the reliability of the connection between the pressure strip 13, the battery cell 12 and the housing 11.

[0079] According to some embodiments of this application, such as Figures 5-9 As shown, the thickness of the main body segment 1321 can be less than the depth of the mounting groove 1311, and the main body segment 1321 can be connected to the bottom of the mounting groove 1311.

[0080] The main body segment 1321 can be located in the mounting groove 1311, and the main body segment 1321 can fit against the bottom of the mounting groove 1311. When the joint 132 is subjected to a large force, the groove wall of the mounting groove 1311 can restrict the displacement of the main body segment 1321 along the width direction of the pressure strip 13, so as to prevent the main body segment 1321 from causing the assembly segment 1322 to shift and affect the stability of the connection between the assembly segment 1322 and the housing 11, and reduce the stress between the main body segment 1321 and the assembly segment 1322, thereby reducing the probability of brittle fracture between the main body segment 1321 and the assembly segment 1322.

[0081] Based on the connection between the casing 11 and the bottom protective plate 14 in the battery 10, the slot of the mounting groove 1311 can face the bottom protective plate 14. By setting the main body section 1321 to not protrude from the mounting groove 1311, the connector 132 using this structure can not only abut against the bottom protective plate 14, so as to prevent the connector 132 from being compressed between the pressure strip body 131 and the bottom protective plate 14 for a long time, causing the bottom protective plate 14 to deform or even squeeze the battery cell 12, and reducing the actual force on the bottom protective plate 14, increasing the stability and reliability of the connection between the casing 11 and the bottom protective plate 14.

[0082] According to some embodiments of this application, such as Figures 5-9 As shown, the main body section 1321 and the mounting groove 1311 can be connected by adhesive.

[0083] Specifically, the main body segment 1321 and the mounting groove 1311 can be bonded together using a high-strength structural adhesive. The structural adhesive may include, but is not limited to, high-performance silicone structural adhesive or neutral transparent silicone structural adhesive, etc. There are no restrictions here.

[0084] It is understandable that when the battery is in operation, the temperature of multiple battery cells is high and they will expand to a certain extent. If the connector and the pressure strip body are connected by welding, when the expansion force is transmitted to the pressure strip body, the weld between the pressure strip body and the connector is a weak point of stress. Under the expansion force, the weld is very easy to break.

[0085] When the main body 1321 and the mounting groove 1311 are connected by adhesive, the structural adhesive can withstand a large load and has stable performance. The structural adhesive between the pressure strip body 131 and the joint 132 can withstand most of the expansion force, reduce the stress on the pressure strip body 131 and the joint 132, and minimize the impact of the expansion of the battery cell 12 on the connection strength between the pressure strip body 131 and the joint 132, thereby extending the service life of the entire pressure strip 13.

[0086] According to some embodiments of this application, such as Figures 5-9 As shown, both ends of the pressure strip body 131 can be provided with a clearance notch 1312 on the side away from the mounting groove 1311.

[0087] In this embodiment, such as Figures 4-9 As shown, the pressure strip body 131 can be thin at both ends and thick in the middle along its length. Multiple battery cells 12 are provided with tabs at the two ends corresponding to the pressure strip body 131. Multiple battery cells 12 can be connected in series or in parallel through the tabs. During the cyclic charging and discharging process of the battery cells 12, due to the chemical reaction inside the battery cells 12, the thickness of the battery cells 12 will increase, which is manifested as expansion to both sides. At this time, the pole will change with the expansion. The tabs can have a certain degree of extensibility to avoid the poles being stretched and cracked. Where there is a clearance notch 1312, due to the volume of the tab itself, the clearance notch 1312 can reserve the space occupied by the tab in its natural state. In addition, the clearance notch 1312 must also take into account the tolerance caused by the expansion of the tab when it is designed. Therefore, the size of the clearance notch 1312 needs to be larger than the size of the tab itself in the actual design to prevent the tab from squeezing each other with the pressure strip 13 when it is extended.

[0088] The pressure strip 13 provided in this application embodiment, through the setting of the above-mentioned avoidance notch 1312, realizes the avoidance of the pad when the pressure strip body 131 is assembled with multiple battery cells 12. The size of the avoidance notch 1312 can be adjusted according to actual needs to prevent the pad from being squeezed against the pressure strip 13 when it extends, which would cause poor contact between the pad and the terminal post, thereby maintaining the stability of the power supply of the battery 10 and optimizing the performance of the battery 10. At the same time, the overall weight of the pressure strip 13 is reduced, which is conducive to increasing the energy density of the battery 10.

[0089] According to some embodiments of this application, such as Figure 5 and Figure 7 As shown, the dimension of the main body segment 1321 along the width direction of the pressure strip body 131 can be smaller than the dimension of the assembly segment 1322 along the width direction.

[0090] In this embodiment, such as Figure 5 and Figure 7 As shown, the main body segment 1321 can be integrally formed with the assembly segment 1322. Since the dimension of the main body segment 1321 along the width direction of the pressure strip body 131 can be smaller than the dimension of the assembly segment 1322 along the width direction, the entire joint 132 can be approximately T-shaped, and the thickness of the main body segment 1321 can be smaller than the thickness of the assembly segment 1322. The assembly segment 1322 can be provided with at least one connecting hole for connecting with the housing 11. The connecting hole can penetrate the assembly segment 1322 along the thickness direction. At this time, the assembly segment 1322, which is wider than the main body segment 1321, can provide sufficient area for the setting of the connecting hole. The number of connecting holes can be increased or decreased according to actual needs.

[0091] The pressure strip 13 provided in this application embodiment, through the structural design that the width of the main body section 1321 is smaller than the width of the assembly section 1322, makes the entire joint 132 form a top-heavy T-shape, providing sufficient area for the setting of the connection hole. The number of connection holes can be increased or decreased according to actual needs, increasing the usable width and flexibility of the entire pressure strip 13, while expanding the contact area between the joint 132 and the housing 11, thereby enhancing the stability and durability of the connection between the joint 132 and the housing 11.

[0092] According to some embodiments of this application, such as Figures 4-9 As shown, the pressure strip 13 may also include a first buffer 135.

[0093] The first buffer 135 can be installed in the mounting slot 1311, and the first buffer 135 and the connector 132 can be separated.

[0094] The first buffer 135 may include, but is not limited to, foam board, pearl cotton or polyurethane foam, etc., without limitation.

[0095] In this embodiment, such as Figures 4-9 As shown, the first buffer 135 can be located in the middle part of the pressure strip body 131, and the thickness of the first buffer 135 can be greater than the depth of the mounting groove 1311. Based on the high elasticity of the first buffer 135, after the pressure strip 13 is assembled with multiple battery cells 12 and the housing 11, the first buffer 135 can be elastically compressed between the bottom guard plate 14 and the pressure strip body 131. Since the two ends of the entire pressure strip 13 are a two-layer structure of the joint 132 combined with the pressure strip body 131, the middle part of the entire pressure strip 13 is a single-layer structure with only the pressure strip body 131. That is, the middle part of the pressure strip 13 is a weak stress point. The setting of the first buffer 135 can protect the middle part of the pressure strip 13.

[0096] The pressure strip 13 provided in this application embodiment, through the setting of the first buffer 135 and the structural design of the pressure strip body 131, enables the first buffer 135 to form a strong protective effect on the relatively weak middle part. When the battery cell 12 expands, the first buffer 135 can absorb most of the expansion force to prevent the middle part of the pressure strip body 131 from being brittle and broken by force.

[0097] According to some embodiments of this application, such as Figures 4-9 As shown, the first buffer 135 can be connected to the pressure strip body 131 and the connector 132 by adhesive.

[0098] Specifically, the first buffer 135 can be bonded to the pressure strip body 131 and the joint 132 using a high-strength structural adhesive. The structural adhesive may include, but is not limited to, high-performance silicone structural adhesive or neutral transparent silicone structural adhesive, etc., without limitation.

[0099] like Figures 4-9 As shown, the first buffer 135 and the connector 132 can be separated, that is, there is a gap between the first buffer 135 and the connector 132. The structural adhesive can fill the gap between the first buffer 135 and the connector 132, or the structural adhesive can fill the entire mounting groove 1311.

[0100] When the first buffer 135 is bonded to the pressure strip body 131 and the joint 132 by adhesive, the structural adhesive can withstand a large load and has stable performance. The structural adhesive between the first buffer 135 and the pressure strip body 131 and the joint 132 can withstand most of the expansion force, further reducing the stress on the pressure strip body 131 and the joint 132, thereby extending the working life of the entire pressure strip 13.

[0101] According to some embodiments of this application, such as Figures 7-9 As shown, the pressure strip 13 may also include a connecting strip 133.

[0102] Both ends of the connecting strip 133 can be connected to the main body section 1321, the connecting strip 133 can be connected to the pressure strip body 131, and the connecting strip 133 can be installed in the mounting groove 1311.

[0103] Considering the strength requirements, the connecting strip 133 can be made of steel. Specifically, the steel can include, but is not limited to, carbon steel, alloy steel, stainless steel or tool steel, etc. There are no restrictions here.

[0104] The connecting strip 133 does not protrude beyond the mounting groove 1311. The connecting strip 133 and the connector 132 can be connected by adhesive, bolt, or welding. Specifically, when the connecting strip 133 and the connector 132 are connected by adhesive, a sufficiently large contact area is required between the connecting strip and the connector 132 to allow for adhesive application, considering the connection strength. When the connecting strip 133 and the connector 132 are connected by bolt, both the connecting strip 133 and the connector 132 can be provided with threaded holes. When the connecting strip 133 and the connector 132 are connected by welding, multiple welding points can be provided between the connecting strip 133 and the connector 132. The welding method can be plug welding, spot welding, or projection welding, etc., without limitation.

[0105] It should be noted that when assembling the connector 132, the pressure strip body 131, and the connecting belt 133, each of the connector 132, the pressure strip body 131, and the connecting belt 133 may be provided with a corresponding positioning structure. The positioning structure may be a positioning hole or a positioning pin, etc., and there is no limitation here.

[0106] The pressure strip 13 provided in this application embodiment realizes the interconnection between the pressure strip body 131, the connector 132 and the connecting strip 133 through the above-mentioned connecting strip 133. Using this structure significantly enhances the shear resistance of the connector 132, reduces the probability of structural adhesive falling off between the connector 132 and the pressure strip body 131 under stress, and further strengthens the overall structure of the pressure strip 13. At the same time, in conjunction with the design of the positioning structure, it improves the assembly accuracy between the connector 132, the pressure strip body 131 and the connecting strip 133.

[0107] According to some embodiments of this application, such as Figures 7-9 As shown, the connecting strip 133 and the pressure strip body 131 can be connected by adhesive.

[0108] Specifically, the connecting strip 133 and the pressure strip body 131 can be bonded together using a high-strength structural adhesive. The structural adhesive may include, but is not limited to, high-performance silicone structural adhesive or neutral transparent silicone structural adhesive, etc. There are no restrictions here.

[0109] When the connecting strip 133 and the pressure strip body 131 are bonded together by adhesive, the structural adhesive can withstand a large load and has stable performance. The structural adhesive between the connecting strip 133 and the pressure strip body 131 can withstand most of the expansion force, reduce the stress on the connecting strip 133 and the pressure strip body 131, and minimize the impact of the expansion of the battery cell 12 on the connection strength between the connecting strip 133 and the pressure strip body 131, thereby extending the service life of the entire pressure strip 13.

[0110] According to some embodiments of this application, such as Figures 7-9 As shown, a portion of the connecting strip 133 can be stacked and connected to the main body segment 1321.

[0111] In this embodiment, such as Figures 7-8 As shown, a portion of the connecting strip 133 can be attached to the side of the main body segment 1321 opposite to the pressure strip body 131.

[0112] In other implementations, such as Figure 9 As shown, a portion of the connecting strip 133 can be attached to the side of the main body segment 1321 near the pressure strip body 131.

[0113] In some other embodiments, the two ends of the connecting strip 133 may abut against and connect with the main body segment 1321.

[0114] The pressure strip 13 provided in this application embodiment, through the structural design of the connecting strip 133 being stacked and connected to the main body segment 1321, significantly increases the contact area between the connecting strip 133 and the main body segment 1321 compared to the scheme where the connecting strip 133 abuts against the joint 132, thereby effectively improving the connection strength between the connecting strip 133 and the joint 132 and further reinforcing the overall structure of the pressure strip 13.

[0115] According to some embodiments of this application, such as Figures 7-9 As shown, the surface of the connecting strip 133 connected to the bottom of the mounting groove 1311 can be flush with the surface of the main body section 1321 connected to the bottom of the mounting groove 1311.

[0116] It is understandable that, since the thickness of the joint is not negligible, when a part of the connecting strip is stacked and connected to the main body, there is a gap in the joint thickness between the connecting strip and the pressure strip body. However, during the assembly of the connecting strip, this gap needs to be filled with structural adhesive, which increases the overall weight of the pressure strip.

[0117] By setting the surface of the connecting strip 133 connected to the bottom of the mounting groove 1311 to be flush with the surface of the main body section 1321 connected to the bottom of the mounting groove 1311, the gap between the connecting strip 133 and the pressure strip body 131 is avoided by using reasonable deformation in the structure, which effectively reduces the amount of structural adhesive used and achieves cost control. At the same time, the overall weight of the pressure strip 13 is reduced, achieving a lightweight design, thereby improving the energy density of the entire battery 10.

[0118] According to some embodiments of this application, such as Figures 7-8 As shown, the connecting strip 133 may include a first connecting segment 1331, a first bending segment 1333, and a second connecting segment 1332. The first connecting segment 1331 may be connected to both ends of the second connecting segment 1332. The first bending segment 1333 may be connected between the first connecting segment 1331 and the second connecting segment 1332. The first connecting segment 1331 may fit against the connector 132, and the first connecting segment 1331 may be located on the side of the connector 132 away from the pressure strip body 131. The second connecting segment 1332 may fit against the pressure strip body 131. The surface of the second connecting segment 1331 connected to the bottom of the mounting groove 1311 may be flush with the surface of the main body segment 1321 connected to the bottom of the mounting groove 1311.

[0119] In this embodiment, such as Figures 7-8As shown, the second connecting segment 1332 can be connected to the first connecting segments 1331 at both ends through the first bending segment 1333. Based on the fact that the first connecting segment 1331 is in contact with the connector 132 and the second connecting segment 1332 is in contact with the pressure strip body 131, the first bending segment 1333 can fill the height difference between the first connecting segment 1331 and the second connecting segment 1332, so that the contact surface of the second connecting segment 1332 and the pressure strip body 131 is flush with the contact surface of the main body segment 1321 and the pressure strip body 131. The outer wall surface of the first bending segment 1333 can be arc-shaped. Further, the first bending segment 1333 can include two arc segments, and the curvature centers of the two arc segments are located on both sides of the first bending segment 1333.

[0120] The pressure strip 13 provided in this application embodiment, through the structural design of the first bending section 1333 being provided on the connecting strip 133, achieves that the surface of the second connecting section 1332 connected to the bottom of the mounting groove 1311 is flush with the surface of the main body section 1321 connected to the bottom of the mounting groove 1311, reducing the amount of structural adhesive used, effectively saving production costs, reducing the overall weight of the pressure strip 13, thereby improving the energy density of the entire battery 10.

[0121] According to some embodiments of this application, such as Figure 9 As shown, the main body segment 1321 may include a first joint segment 13211, a second curved segment 13213, and a second joint segment 13212 connected in sequence. The first joint segment 13211 can fit with the connecting strip 133, and the first joint segment 13211 can be located on the side of the connecting strip 133 away from the pressure strip body 131. The second joint segment 13212 can fit with the pressure strip body 131. The surface of the connecting strip 133 connected to the bottom of the mounting groove 1311 and the surface of the second joint segment 13212 connected to the bottom of the mounting groove 1311 can be flush.

[0122] In this embodiment, such as Figure 9As shown, the connector 132 may include sequentially connected assembly sections 1322, a first connector section 13211, a second bending section 13213, and a second connector section 13212. The connecting strip 133 can be fitted with the first connector sections 13211 at both ends of the connector 132. The first connector section 13211 can be connected to the second connector section 13212 through the second bending section 13213. Based on the fit between the first connector section 13211 and the connecting strip 133, and the fit between the second connector section 13212 and the pressure strip body 131, The second curved section 13213 can fill the height difference between the first joint section 13211 and the second joint section 13212, so that the contact surface of the second joint section 13212 and the pressure strip body 131 is flush with the contact surface of the connecting strip 133 and the pressure strip body 131. The outer wall surface of the second curved section 13213 can be arc-shaped. Furthermore, the second curved section 13213 can include two arc segments, and the curvature centers of the two arc segments can be located on both sides of the second curved section 13213.

[0123] The pressure strip 13 provided in this application embodiment, through the structural design of the second bending section 13213 being provided on the main body section 1321 of the connector 132, achieves that the surface of the connecting strip 133 connected to the bottom of the mounting groove 1311 is flush with the surface of the second connector section 13212 connected to the bottom of the mounting groove 1311, reducing the amount of structural adhesive used, effectively saving production costs, reducing the overall weight of the pressure strip 13, thereby improving the energy density of the entire battery 10.

[0124] According to some embodiments of this application, such as Figures 8-9 As shown, the minimum thickness H1 of the connecting strip 133 can satisfy: 0.1mm≤H1≤50mm.

[0125] Specifically, the minimum thickness H1 of the connecting strip 133 can be 0.1mm, 5.25mm, 15mm, 30.785mm, 45.5mm, 50mm or other values ​​between 0.1mm and 50mm, without any restrictions.

[0126] It should be noted that the minimum thickness H1 of the connecting strip 133 refers to the thickness of the weakest point of the connecting strip 133. In actual design, the thickness of the connecting strip 133 can be uniform along the length direction.

[0127] The pressure strip 13 provided in this application embodiment, by limiting the range of the minimum thickness H1 of the connecting strip 133 as described above, prevents the minimum thickness H1 of the connecting strip 133 from being too large, which would result in excessive weight of the connecting strip 133, thereby minimizing the weight of the pressure strip 13 and thus improving the energy density of the battery 10; and prevents the minimum thickness H1 of the connecting strip 133 from being too small, which would result in insufficient rigidity of the connecting strip 133 itself, thereby improving the connection strength between the connecting strip 133 and the connector 132, and thus improving the reliability and durability of the overall structure of the pressure strip 13.

[0128] According to some embodiments of this application, such as Figure 6 and Figures 8-9 As shown, the length L of connector 132 can satisfy: 10mm≤L≤3000mm.

[0129] Specifically, the length L of connector 132 can be 10mm, 100.8mm, 1200mm, 2100.45mm, 2500mm, 3000mm or other values ​​between 10mm and 3000mm, and there are no restrictions here.

[0130] The pressure strip 13 provided in this application embodiment, by limiting the range of the length L of the connector 132 as described above, prevents the length L of the connector 132 from being too large, which would result in an excessive weight of the connector 132, thereby minimizing the weight of the pressure strip 13 and thus improving the energy density of the battery 10; and prevents the length L of the connector 132 from being too small, which would result in an excessively small contact area between the connector 132 and the pressure strip body 131, thereby improving the connection strength between the connector 132 and the pressure strip body 131.

[0131] According to some embodiments of this application, such as Figure 6 and Figures 8-9 As shown, the minimum thickness H2 of connector 132 can satisfy: H2≥0.5mm.

[0132] Specifically, the minimum thickness H2 of connector 132 can be 0.5mm, 1.25mm, 5mm, 6.5mm or other values ​​greater than 0.5mm, without any restrictions here.

[0133] It should be noted that, since the thickness of the main body section 1321 is less than the thickness of the assembly section 1322, the minimum thickness H2 of the joint 132 refers to the thickness of the weakest point of the main body section 1321 of the joint 132. In actual design, the thickness of the main body section 1321 can be uniform along the length direction.

[0134] The pressure strip 13 provided in this application embodiment, by limiting the range of the minimum thickness H2 of the joint 132 as described above, prevents the minimum thickness H2 of the joint 132 from being too small, which would result in insufficient rigidity of the joint 132 itself, thereby improving the connection strength between the joint 132, the connecting strip 133 and the pressure strip body 131, and thus improving the reliability and durability of the overall structure of the pressure strip 13.

[0135] According to some embodiments of this application, this application also provides a battery 10, which includes a housing 11, a plurality of battery cells 12 and a retaining strip 13 of any of the above embodiments. The housing 11 defines a receiving cavity, the plurality of battery cells 12 are installed in the receiving cavity, the plurality of retaining strips 13 are installed on the surface of the plurality of battery cells 12, and the plurality of retaining strips 13 are connected to the housing 11.

[0136] Multiple pressure strips 13 are installed on the side where the electrode terminals of multiple battery cells 12 are located. For example, when the battery 10 is assembled upright, the multiple pressure strips 13 can be installed on the top surface of the multiple battery cells 12; when the battery 10 is assembled upside down, the multiple pressure strips 13 can be installed on the bottom surface of the multiple battery cells 12.

[0137] It should be noted that the battery 10 may also include a second buffer, which can be installed on the bottom surface of the multiple battery cells 12. The second buffer and the pressure strip 13 are both located between the bottom protective plate 14 and the multiple battery cells 12. The second buffer can be used to protect the terminals of the multiple battery cells 12.

[0138] The second cushioning component may include, but is not limited to, foam board, pearl cotton or polyurethane foam, etc., without limitation.

[0139] According to some embodiments of this application, this application also provides an electrical device including a battery 10 of any of the above schemes, and the battery 10 is used to provide electrical energy to the electrical device.

[0140] The electrical device can be any of the aforementioned devices or systems that use battery 10.

[0141] According to some embodiments of this application, such as Figures 3-9As shown, this application provides a pressure strip 13 applied to a battery 10. The pressure strip 13 includes a pressure strip body 131 and a connector 132. The pressure strip body 131 forms a mounting groove 1311; both ends of the pressure strip body 131 are connected to connectors 132. Each connector 132 includes a main body segment 1321 connected to the pressure strip body 131 and an assembly segment 1322 for connecting to the casing 11 of the battery 10. At least a portion of the main body segment 1321 is installed within the mounting groove 1311. The thickness of the main body segment 1321 is less than the depth of the mounting groove 1311. The main body segment 1321 is connected to the bottom of the mounting groove 1311 and is bonded to the mounting groove 1311 by adhesive. Both ends of the pressure strip body 131 have clearance notches 1312 on the side facing away from the mounting groove 1311. The dimension of the main body segment 1321 along the width direction of the pressure strip body 131 is smaller than the dimension of the assembly segment 1322 along the width direction. The pressure strip 13 further includes: a first buffer member 135, which is installed in the mounting groove 1311 and is separated from the connector 132. The first buffer member 135 is connected to the pressure strip body 131 and the connector 132 by adhesive. The pressure strip 13 also includes: a connecting strip 133, whose two ends are connected to the main body section 1321, and the connecting strip 133 is connected to the pressure strip body 131. The connecting strip 133 is installed in the mounting groove 1311 and is connected to the pressure strip body 131 by adhesive. A portion of the connecting strip 133 is stacked and connected to the main body section 1321, and the surface of the connecting strip 133 connected to the bottom of the mounting groove 1311 is flush with the surface of the main body section 1321 connected to the bottom of the mounting groove 1311.

[0142] Specifically, the connecting belt 133 and the connector 132 include the following two structural forms.

[0143] Firstly, the connecting strip 133 includes a first connecting section 1331, a first bending section 1333, and a second connecting section 1332. The first connecting section 1331 is connected to both ends of the second connecting section 1332. The first bending section 1333 is connected between the first connecting section 1331 and the second connecting section 1332. The first connecting section 1331 is fitted with the connector 132, and the first connecting section 1331 is located on the side of the connector 132 away from the pressure strip body 131. The second connecting section 1332 is fitted with the pressure strip body 131. The surface of the second connecting section 1332 connected to the bottom of the mounting groove 1311 is flush with the surface of the main body section 1321 connected to the bottom of the mounting groove 1311.

[0144] Secondly, the main body section 1321 includes a first joint section 13211, a second bending section 13213, and a second joint section 13212 connected in sequence. The first joint section 13211 is attached to the connecting strip 133, and the first joint section 13211 is located on the side of the connecting strip 133 away from the pressure strip body 131. The second joint section 13212 is attached to the pressure strip body 131. The surface of the connecting strip 133 connected to the bottom of the mounting groove 1311 is flush with the surface of the second joint section 13212 connected to the bottom of the mounting groove 1311.

[0145] Among them, the minimum thickness H1 of the connecting strip 133 satisfies: 0.1mm≤H1≤50mm; the length L of the connector 132 satisfies: 10mm≤L≤3000mm; and the minimum thickness H2 of the connector 132 satisfies: H2≥0.5mm.

[0146] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0147] 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 pressure strip, used in a battery, characterized in that, include: The pressure strip body forms an installation groove; The connector is provided at both ends of the pressure strip body. The connector includes a main body section connected to the pressure strip body and an assembly section for connecting to the battery housing. At least a portion of the main body section is installed in the mounting groove. A connecting strip, the two ends of which are connected to the main body section, the connecting strip is connected to the pressure strip body, and the connecting strip is installed in the mounting groove.

2. The pressure strip according to claim 1, characterized in that, The thickness of the main body segment is less than the depth of the mounting groove, and the main body segment is connected to the bottom of the mounting groove.

3. The pressure strip according to claim 2, characterized in that, The main body segment is connected to the mounting groove by adhesive.

4. The pressure strip according to claim 1, characterized in that, Both ends of the pressure strip body are provided with clearance notches on the side away from the mounting groove.

5. The pressure strip according to any one of claims 1-4, characterized in that, The dimension of the main body segment along the width direction of the pressure strip body is smaller than the dimension of the assembly segment along the width direction.

6. The pressure strip according to claim 1, characterized in that, Also includes: The first buffer is installed in the mounting slot and is separated from the connector.

7. The pressure strip according to claim 6, characterized in that, The first buffer element is connected to the pressure strip body and the joint by adhesive.

8. The pressure strip according to claim 1, characterized in that, The connecting strip is bonded to the pressure strip body by adhesive.

9. The pressure strip according to claim 1, characterized in that, A portion of the connecting strip is stacked and connected to the main body segment.

10. The pressure strip according to claim 9, characterized in that, The surface of the connecting strip connected to the bottom of the mounting groove is flush with the surface of the main body section connected to the bottom of the mounting groove.

11. The pressure strip according to claim 10, characterized in that, The connecting strip includes a first connecting segment, a first curved segment, and a second connecting segment. The first connecting segment is connected to both ends of the second connecting segment, and the curved segment is connected between the first connecting segment and the second connecting segment. The first connecting segment fits into the connector and is located on the side of the connector opposite to the pressure strip body. The second connecting segment fits into the pressure strip body, and the surface of the second connecting segment connected to the bottom of the mounting groove is flush with the surface of the main body segment connected to the bottom of the mounting groove.

12. The pressure strip according to claim 10, characterized in that, The main body section includes a first joint section, a second curved section, and a second joint section connected in sequence. The first joint section is attached to the connecting strip and is located on the side of the connecting strip away from the pressure strip body. The second joint section is attached to the pressure strip body. The surface of the connecting strip connected to the bottom of the mounting groove is flush with the surface of the second joint section connected to the bottom of the mounting groove.

13. The pressure strip according to claim 1, characterized in that, The minimum thickness H1 of the connecting strip satisfies: 0.1mm≤H1≤50mm.

14. The pressure strip according to any one of claims 1-4, characterized in that, The length L of the connector satisfies: 10mm≤L≤3000mm.

15. The pressure strip according to any one of claims 1-4, characterized in that, The minimum thickness H2 of the joint shall satisfy: H2≥0.5mm.

16. A battery, characterized in that, include: The housing defines a receiving cavity; Multiple battery cells are installed in the receiving cavity; A plurality of pressure strips as described in any one of claims 1-15, wherein the plurality of pressure strips are mounted on the surface of the plurality of battery cells and are connected to the housing.

17. An electrical device, characterized in that, include: The battery as claimed in claim 16.

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