Battery device and power utilization device

Abstract

The utility model provides a battery device and a power utilization device, the battery device comprises a box body, a plurality of battery monomers and a press fitting piece, the box body comprises at least two beam bodies which are oppositely arranged along a first direction; the plurality of single batteries are accommodated in the box body and are positioned between the two beam bodies; the press fitting piece comprises a pressing strip, a first insulating layer and a second insulating layer; the pressing strip extends in the first direction, and the two ends of the pressing strip are connected with the two beam bodies correspondingly. Wherein the first insulating layer wraps at least part of the pressing strip in the circumferential direction of the pressing strip, and the first insulating layer is provided with a first side edge and a second side edge in the circumferential direction of the pressing strip; the second insulating layer at least covers the first side edge, the second side edge and an area between the first side edge and the second side edge. Specifically, the arrangement of the second insulating layer can improve the condition that the first insulating layer is easy to be layered with the pressing strip, so that the reliability of the press-fitting piece is improved, and the matching of the second insulating layer and the first insulating layer can realize a double-layer insulating effect.

Description

Technical Field

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

[0002] Moduleless battery devices integrate individual battery cells directly into the battery housing, eliminating the need for a module architecture, simplifying the structure of the battery device, and thus improving space utilization.

[0003] In the operation of module-less battery devices, the expansion force of the individual battery cells is mainly borne by the beams within the battery device. Therefore, to improve the stress and deformation of the beams, relevant technical solutions employ press-fit components to fix the beams. These press-fit components typically include pressure strips and an insulating layer. The pressure strips are used to fix the beams, and the insulating layer provides insulation between the pressure strips and the individual battery cells.

[0004] However, when a battery cell is in a high-temperature environment, such as external fire or internal thermal runaway, the insulation layer covering the pressure strip is prone to delamination and warping. Since the pressure strip is usually made of metal, the delamination and warping of the insulation layer will cause abnormal insulation of the press-fit component, resulting in low reliability of the press-fit component. Utility Model Content

[0005] In view of the above problems, this application provides a battery device and an electrical device that can solve the problem of low reliability of existing press-fit components.

[0006] In a first aspect, this application provides a battery device, comprising: a housing including at least two beams disposed opposite to each other along a first direction; a plurality of battery cells housed within the housing and located between the two beams; and a press-fitting component including a pressure strip, a first insulating layer, and a second insulating layer; the pressure strip extends along the first direction and its two ends are respectively connected to the two beams; wherein the first insulating layer wraps around at least a portion of the pressure strip along its circumference, and along the circumference of the pressure strip, the first insulating layer has a first side and a second side; and the second insulating layer at least covers the first side, the second side, and the area between the first side and the second side.

[0007] In the technical solution of this application embodiment, the first insulating layer is used to provide insulation between the pressure strip and the battery cell, reducing the safety risks caused by direct contact between the pressure strip and the battery cell. The second insulating layer is provided to at least cover the first side, the second side and the area between the first side and the second side of the first insulating layer. The provision of the second insulating layer can improve the situation where the first insulating layer is prone to delamination with the pressure strip, thereby improving the reliability of the press-fit component. Moreover, the second insulating layer and the first insulating layer can achieve the effect of double-layer insulation.

[0008] In some embodiments, the first side and the second side abut to form a first splicing gap, and the second insulating layer covers the first splicing gap. This design allows both the first and second insulating layers to cover the pressure strip relatively flat, and the first insulating layer effectively wraps around the pressure strip, improving the insulation between the pressure strip and the battery cell.

[0009] In some embodiments, the first and second sides are located on the side of the pressure strip closest to the battery cell; the second insulating layer wraps around at least a portion of the first insulating layer along the circumference of the pressure strip, and along the circumference of the pressure strip, the second insulating layer has a third and a fourth side; wherein the third and fourth sides are located on the side of the pressure strip opposite to the battery cell. Specifically, the second insulating layer covers the first splicing gap of the first insulating layer on the side close to the battery cell, and extends to cover the side of the pressure strip opposite to the battery cell, which can further improve the insulation performance and reliability of the insulating layer.

[0010] In some embodiments, the insulating layer of the press-fit component further includes a third insulating layer, which at least covers the third side, the fourth side, and the area between the third and fourth sides. Specifically, the third insulating layer covers at least the third side, the fourth side, and the area between the third and fourth sides of the second insulating layer. The third insulating layer can improve the situation where the second insulating layer is prone to delamination from the first insulating layer, thereby improving the reliability of the press-fit component. Furthermore, the first, second, and third insulating layers work together to achieve a three-layer insulation effect.

[0011] In some embodiments, the third side abuts against the fourth side to form a second splicing gap; the third insulating layer is located only on the side of the pressure strip away from the battery cell and covers the second splicing gap. This design allows the second insulating layer to wrap around the pressure strip and the first insulating layer relatively flat, and the third insulating layer is located only on the side of the pressure strip away from the battery cell and covers the second splicing gap. The third insulating layer can improve the delamination of the second insulating layer and save on the cost of the third insulating layer.

[0012] In some embodiments, the ratio of the width of the third insulating layer to the width of the pressure strip is 50-100%. By reasonably setting the ratio of the width of the third insulating layer to the width of the pressure strip, an optimal solution for improving the delamination of the second insulating layer and reducing the cost of the insulating layer can be achieved.

[0013] In some embodiments, the third insulating layer is bonded to the second insulating layer. Specifically, the bonding method is simple in process and has strong connection reliability.

[0014] In some embodiments, along the circumference of the pressure strip, the first side and the second side partially overlap to form a first overlapping area, and the first overlapping area extends along a first direction, with the second insulating layer covering the first overlapping area. By designing the first side and the second side to partially overlap along the circumference of the pressure strip, one side of the first side and the second side achieves pressing against the other side, thereby reducing the possibility of one side of the first insulating layer easily delaminating with the pressure strip. Furthermore, by providing the second insulating layer to cover the first overlapping area, the second insulating layer can further reduce the possibility of the other side of the first insulating layer easily delaminating with the pressed side, thereby improving the reliability of the press-fitted component.

[0015] In some embodiments, along the circumference of the pressure strip, the third side and the fourth side partially overlap to form a second overlapping area, and the second overlapping area extends along a first direction, with the third insulating layer covering the second overlapping area. By designing that the third and fourth sides partially overlap along the circumference of the pressure strip, one side of the third and fourth sides presses against the other side, thereby reducing the likelihood of one side of the second insulating layer easily delaminating from the first insulating layer. Furthermore, by providing the third insulating layer to cover the second overlapping area, the third insulating layer can further reduce the likelihood of the other side of the second insulating layer easily delaminating from the pressed side, thereby improving the reliability of the press-fitted component.

[0016] In some embodiments, the housing further includes a base plate, two beams located on one surface of the base plate, and both beams extending along a second direction; the first direction intersects the second direction; the press-fitting member is located on the side of the battery cell away from the base plate, and / or the press-fitting member is located on opposite sides of the battery cell along the second direction. By adopting the above technical solution, the press-fitting member can fix and constrain the battery cell, and when the battery is under vibration, the press-fitting member can suppress the vibration amplitude of the battery cell.

[0017] In some embodiments, the surface of the press-fit component facing the battery cell is also bonded to the battery cell. This reduces the likelihood of the press-fit component hitting the battery cell, and the bonding method is simple to operate and has high connection reliability, thereby improving battery reliability.

[0018] In some embodiments, the battery further includes a buffer layer disposed between the press-fit component and the battery cell. Specifically, the buffer layer is designed so that the press-fit component and the battery cell do not come into direct contact, thereby mitigating the safety risks caused by the press-fit component directly striking the battery cell.

[0019] Secondly, this application provides an electrical device including any of the aforementioned battery devices. Specifically, the electrical device employing any of the aforementioned battery devices can improve the reliability of the electrical device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0022] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0023] Figure 3 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0024] Figure 4 Exploded views of the structure of a single battery cell provided in some embodiments of this application;

[0025] Figure 5 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0026] Figure 6 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0027] Figure 7 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0028] Figure 8 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0029] Figure 9 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0030] Figure 10 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0031] Figure 11 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component;

[0032] Figure 12 for Figure 10 The exploded view of the press-fit component shown.

[0033] Explanation of icon numbers:

[0034] Vehicle - 1000; Battery - 100; Controller - 200; Motor - 300;

[0035] Box-10; Beam-11; Base plate-12;

[0036] Several battery cells-20; casing-21, electrode assembly-22; cover plate-23; pressure relief mechanism-24; terminal post-25; connecting component-26;

[0037] Press-fit component-30; Pressure strip-31; Insulation layer-32; First insulation layer-321; First side-E1; Second side-E2; Second insulation layer-322; Third side-E3; Fourth side-E4; Third insulation layer-323; First splicing gap-G1; Second splicing gap-G2; First overlapping area O1; Second overlapping area O2;

[0038] First direction - X; Second direction - Y. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0040] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] Currently, the application of battery devices is becoming increasingly widespread in the market. For electrical devices such as electric vehicles, battery technology is a crucial factor in their development. During charging and discharging, individual battery cells expand. For module-less battery devices, the expansion force of the battery cells is mainly borne by the beam structure. To mitigate the stress and deformation of the beam, relevant technical solutions employ press-fit components to fix the beam. Existing press-fit components generally include a metal pressure strip and at least an insulating layer between the metal pressure strip and the battery cells. The metal pressure strip is used to fix the beam, and the insulating layer is typically a single layer providing insulation between the metal pressure strip and the battery cells. However, in certain scenarios, such as high temperatures, fire, or insulation aging, the insulating layer is prone to delamination from the metal pressure strip (e.g., peeling off between the insulating layer and the metal pressure strip, or warping at the ends of the insulating layer), thus affecting the reliability of the insulation between the metal pressure strip and the battery cells.

[0046] To address the issue of easy delamination between the insulating layer and the metal pressure strip in the aforementioned press-fit components, this application provides a battery device and an electrical device. The battery device includes a housing, a plurality of battery cells, and a press-fit component. Specifically, the housing includes at least two beams arranged opposite each other along a first direction; the plurality of battery cells are housed within the housing and located between the two beams; the press-fit component includes a pressure strip, a first insulating layer, and a second insulating layer; the pressure strip extends along the first direction, and its two ends are respectively connected to the two beams; wherein the first insulating layer wraps around at least a portion of the pressure strip circumferentially, and along the circumferential direction of the pressure strip, the first insulating layer has a first side and a second side; the second insulating layer at least covers the first side, the second side, and the area between the first and second sides.

[0047] In the technical solution of this application embodiment, since the two ends of the pressure strip are respectively connected to two beams, the pressure strip can reduce the risk of beam deformation caused by the expansion of the battery cells and the squeezing of the beams, reduce the amount of beam deformation, and thus reduce the risk of structural failure of the battery; the first insulating layer is used to provide insulation between the pressure strip and the battery cells, reducing the safety risk caused by direct contact between the pressure strip and the battery cells; the second insulating layer is provided to at least cover the first side, the second side and the area between the first side and the second side of the first insulating layer; the provision of the second insulating layer can improve the situation where the first insulating layer is prone to delamination with the pressure strip, thereby improving the reliability of the press-fit component, and the second insulating layer and the first insulating layer together can achieve the effect of double insulation.

[0048] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. 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. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0049] 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.

[0050] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 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. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 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 1000 during starting, navigation, and driving.

[0051] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0052] See Figures 2-12 , Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 3 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0053] Figure 4 Exploded views of the structure of a single battery cell provided in some embodiments of this application; Figure 5 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 6 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 7 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 8 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 9 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 10 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 11 for Figure 3 Structural cross-sectional views along line AA of some embodiments of the press-fit component; Figure 12 for Figure 10 The exploded view of the press-fit component shown.

[0054] The battery device 100 provided in the first aspect of this application includes a housing 10, a plurality of battery cells 20, and a press-fitting component 30. Specifically, the housing 10 includes at least two beams 11 arranged opposite each other along a first direction X; the plurality of battery cells 20 are housed within the housing 10 and located between the two beams 11; the press-fitting component 30 includes a pressure strip 31 and an insulating layer 32; the pressure strip 31 extends along the first direction X, and its two ends are respectively connected to the two beams 11; the insulating layer 32 includes a first insulating layer 321 and a second insulating layer 322; wherein, the first insulating layer 321 wraps at least a portion of the pressure strip 31 circumferentially, and along the circumferential direction of the pressure strip 31, the first insulating layer 321 has a first side E1 and a second side E2; the second insulating layer 322 at least covers the first side E1, the second side E2, and the area between the first side E1 and the second side E2.

[0055] Among them, see Figure 2 and Figure 3 The housing 10 includes at least two beams 11 arranged opposite each other along a first direction X; the first direction X is the direction in which the expansion force of the battery cell 20 is greatest during the charging and discharging process of the battery device 100; the battery cell 20 expands along the first direction X, which will compress the beams 11 on both sides in the first direction X. The number of beams 11 can be two or more. When there are two or more beams 11, each pair of beams 11 forms a group and is arranged opposite each other along the first direction X.

[0056] The beam 11 is a wall panel on the box 10, which can be integrally formed or fixedly connected to the rest of the structure of the box 10. The beam 11 can be made of metal or plastic, and its shape can be flat, columnar, or other shapes. Optionally, the box 10 includes an upper cover (not shown) and a lower box; the lower box includes the beam 11 and a bottom plate 12, with the beam 11 vertically disposed on one surface of the bottom plate 12.

[0057] Optionally, at least one of the two beams 11 is an expansion beam of the box 10.

[0058] Specifically, the expansion beam is a beam-like structure spanning the bottom plate 12 of the housing 10. The expansion beam has a cavity, and the space inside the housing 10 can be divided into two parts by the expansion beam. One part is the accommodating space defined by the expansion beam, the side plates, and the bottom plate 12 of the housing 10, which can accommodate multiple battery cells 20 arranged in an array. The other part is the installation space for accommodating the battery management system (BMS), high-voltage box, etc. The expansion beam can be made of sheet metal or extruded profile. In this application, the material of the expansion beam is a non-metallic composite material, which can be a resin and fiber composite material, such as carbon fiber reinforced resin or glass fiber reinforced resin.

[0059] Here, battery cell 20 refers to the smallest unit that makes up the battery. See also Figure 4 The battery cell 20 may include a housing 21, an electrode assembly 22, and a cover 23. The housing 21 has a communicating cavity and a mounting port. The number of electrode assemblies 22 may be one or more; the electrode assemblies 22 are mounted in the cavity of the housing 21. The cover 23 is connected to the housing 21 and covers the mounting port. The housing 21 is filled with an electrolyte, such as an electrolyte solution. The electrode assembly 22 may include a positive electrode and a negative electrode, as well as a separator disposed between the positive and negative electrodes. During the charging and discharging process of the battery cell 20, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator can, to some extent, prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0060] The battery cell 20 may also include a pressure relief mechanism 24, two terminals 25, and two connecting members 26 (also referred to as current collectors). The pressure relief mechanism 24 may be disposed on the cover plate 23, for example, fixed to the cover plate 23. The pressure relief mechanism 24 is actuated to release the internal electrolyte when the internal pressure or temperature of the battery cell 20 reaches a threshold, thereby reducing the internal pressure or temperature of the battery cell 20. For example, the pressure relief mechanism 24 can be a temperature-sensitive valve, or a pressure-sensitive valve. The two terminals 25 may be disposed on the cover plate 23, for example, fixed to the cover plate 23. The two terminals 25 are respectively a positive terminal 25 and a negative terminal 25. Each terminal 25 is correspondingly connected to a connecting member 26. The connecting member 26 is located between the cover plate 23 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the terminal 25.

[0061] The housing 21 is a hollow structure. The material of the housing 21 can be metal or plastic; for example, the material of the housing 21 can be copper, iron, aluminum, steel, aluminum alloy, etc. Exemplarily, the housing 21 can be a steel shell, aluminum shell, plastic shell (such as polypropylene), composite metal shell (such as a copper-aluminum composite shell), or aluminum-plastic film, etc. The shape of the housing 21 can be determined according to the specific shape of the electrode assembly 22; for example, if the electrode assembly 22 is rectangular, then the housing 21 can be a rectangular shell; or, for example, if the electrode assembly 22 is cylindrical, then the housing 21 can be a cylindrical shell.

[0062] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0063] In the battery device 100, there can be multiple battery cells 20, which 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 connections. 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 be formed by first connecting multiple battery cells 20 in series, parallel, or in a mixed configuration to form a battery cell assembly, and then connecting these battery cell assemblies 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.

[0064] Multiple battery cells 20 are arranged between two beams 11 along the first direction X. Furthermore, each beam 11 extends along the second direction Y, and the multiple battery cells 20 are also arranged in multiple rows along the second direction Y. Each row of battery cells 20 is arranged between two beams 11, so that the beams 11 can withstand more expansion forces from the battery cells 20 arranged along the second direction Y.

[0065] The press-fit component 30 is installed on the beam 11 and serves to suppress the deformation of the beam 11 caused by the expansion force of the battery cell 20. There can be multiple press-fit components 30, which can be arranged in parallel and at intervals on the beam 11 to uniformly bear the expansion force on the beam 11 and alleviate the deformation of the beam 11.

[0066] In some embodiments, the press-fit component 30 may be connected to the beam 11 by at least one of snap-fit, welding, riveting, bonding or bolting.

[0067] And combined Figures 5-12 In some embodiments of this application, the press-fit component 30 includes a pressure strip 31 and an insulating layer 32.

[0068] The pressure strip 31 can be a long strip-shaped structure, and the extension direction of the pressure strip 31 is the same as the first direction X. Each pressure strip 31 is connected to two beams 11 at both ends. The pressure strip 31 can be, but is not limited to, metal parts such as steel strips and copper strips.

[0069] The insulating layer 32 is used to insulate the pressure strip 31 from the battery cell 20. In some embodiments of this application, the insulating layer 32 includes a first insulating layer 321 and a second insulating layer 322. The first insulating layer 321 wraps around at least a portion of the pressure strip 31 circumferentially, thereby insulating the pressure strip 31 from the battery cell 20. The insulating layer 32 is exposed at the end of the pressure strip 31 along the first direction X, so that the end of the pressure strip 31 can be fixedly connected to the beam 11. In addition, the insulating layer 32 covers the circumferential surface of the pressure strip 31, so that the pressure strip 31 is not only insulated from the battery cell 20, but also from other adjacent components or parts within the housing 10, improving the reliability of the battery device 100.

[0070] The materials of the insulating layer 32 include, but are not limited to, polyethylene, polypropylene, polyimide, epoxy resin, insulating ceramics, etc. That is, the first insulating layer 321, the second insulating layer 322, and the third insulating layer 323 (described below) include, but are not limited to, one of the aforementioned insulating materials.

[0071] In some embodiments of this application, the first insulating layer 321 has a first side E1 and a second side E2 along the circumference of the pressure strip 31. It is understood that in the embodiments of this application, the first insulating layer 321 is not a continuous and seamless structure along the circumference of the pressure strip 31. Therefore, when the first insulating layer 321 is assembled with the pressure strip 31, the first insulating layer 321 is not sleeved on the outer surface of the pressure strip 31. Instead, one side of the first insulating layer 321 can be fixed first, and the other side can wrap around the pressure strip 31 in the circumference. This design can facilitate the first insulating layer 321 wrapping around the pressure strip 31 in the circumference during the manufacturing process.

[0072] Furthermore, to mitigate the issue of the first insulating layer 321 and its first side E1 and second side E2 lifting and delaminating from the pressure strip 31 under conditions of high temperature, fire, and aging, the insulating layer 32 further includes a second insulating layer 322. The second insulating layer 322 at least covers the first side E1, the second side E2, and the area between the first side E1 and the second side E2, thus fixing the first side E1 and the second side E2 and improving the situation where the first insulating layer 321 easily delaminates from the pressure strip 31. Additionally, when there is a gap between the first side E1 and the second side E2, i.e., when the first insulating layer 321 does not completely wrap around the first pressure strip 31 circumferentially, the second insulating layer 322 can also cover the gap area between the first side E1 and the second side E2, improving the insulation performance of the press-fit component 30.

[0073] Furthermore, the first insulating layer 321 can be bonded and fixed to the pressure strip 31. The second insulating layer 322 can be bonded and fixed to the first insulating layer 321.

[0074] Specifically, in the technical solution of this application embodiment, since the two ends of the pressure strip 31 are respectively connected to the two beams 11, the pressure strip 31 can reduce the risk of deformation of the beams 11 caused by the expansion of the battery cell 20 and the squeezing of the beams 11, reduce the amount of deformation of the beams 11, and thus reduce the risk of structural failure of the battery device 100; the first insulating layer 321 is used to provide insulation between the pressure strip 31 and the battery cell 20, reduce the safety risk caused by direct contact between the pressure strip 31 and the battery cell 20, and the second insulating layer 322 is provided to at least cover the first side E1, the second side E2 and the area between the first side E1 and the second side E2 of the first insulating layer 321. The provision of the second insulating layer 322 can improve the situation where the first insulating layer 321 is prone to delamination with the pressure strip 31, thereby improving the reliability of the press-fit component 30, and the second insulating layer 322 and the first insulating layer 321 can achieve the effect of double insulation.

[0075] In some embodiments, see Figure 5 A gap exists between the first side E1 and the second side E2, and the second insulating layer 322 covers the first side E1, the second side E2, and the gap area between the first side E1 and the second side E2. This improves the situation where the first side E1 and the second side E2 are delaminated and warped, and provides insulation to the area of ​​the pressure strip 31 exposed in the gap between the first side E1 and the second side E2.

[0076] In some embodiments, see Figure 6 The first side E1 and the second side E2 abut against each other to form a first splicing gap G1, and the second insulating layer 322 covers the first splicing gap G1.

[0077] Among them, the first splicing gap G1 refers to the gap between the two sides of the first insulation layer 321 along the circumference of the pressure strip 31, which is caused by the inability to achieve a seamless connection due to splicing.

[0078] In this embodiment, the first side E1 and the second side E2 are arranged to abut each other, so the width of the first splicing gap G1 formed is negligible. This design allows the first insulating layer 321 to cover the pressure strip 31 relatively flat, and the first insulating layer 321 effectively wraps around the pressure strip 31, improving the insulation between the pressure strip 31 and the battery cell 20. Consequently, the second insulating layer 322 can also cover the first insulating layer 321 relatively flat, improving the product's aesthetics.

[0079] In some embodiments, reference Figure 3 and Figure 7The first side E1 and the second side E2 are located on the side of the pressure strip 31 close to the battery cell 20. The second insulating layer 322 wraps around at least a portion of the first insulating layer 321 along the circumference of the pressure strip 31, and along the circumference of the pressure strip 31, the second insulating layer 322 has a third side E3 and a fourth side E4; wherein the third side E3 and the fourth side E4 are located on the side of the pressure strip 31 away from the battery cell 20.

[0080] With the first side E1 and the second side E2 located on the side of the pressure strip 31 closest to the battery cell 20, the pressure strip 31 and the battery cell 20 can press the first side E1 and the second side E2 together, alleviating the delamination of the first side E1 and the second side E2. Furthermore, since the second insulating layer 322 further covers the first side E1, the second side E2, and the area between them, there are a first insulating layer 321 and a second insulating layer 322 between the pressure strip 31 and the battery cell 20, achieving a double insulation effect between the pressure strip 31 and the battery cell 20.

[0081] By providing a second insulating layer 322 to cover the first side E1, the second side E2, and the area between them on the side close to the battery cell 20, and by extending the second insulating layer 322 circumferentially along the pressure strip 31 to the side of the pressure strip 31 away from the battery cell 20, the insulation performance and reliability of the insulating layer 32 can be further improved.

[0082] In some embodiments, the first side E1 and the second side E2 may also be located on the side of the pressure strip 31 away from the battery cell 20, so that the first insulating layer 321 has no gap on the side of the pressure strip 31 close to the battery cell 20, thereby improving the insulation reliability.

[0083] In some embodiments, see Figures 9-11 The press-fit component 30 (specifically, the insulating layer 32) also includes a third insulating layer 323, which at least covers the third side E3, the fourth side E4, and the area between the third side E3 and the fourth side E4.

[0084] Specifically, the second insulating layer 322 is provided to cover at least the third side E3, the fourth side E4, and the area between the third side E3 and the fourth side E4 of the second insulating layer 322. The provision of the third insulating layer 323 can improve the situation where the second insulating layer 322 is prone to delamination with the first insulating layer 321, thereby improving the reliability of the press-fit component 30. Furthermore, the first insulating layer 321, the second insulating layer 322, and the third insulating layer 323 work together to achieve the effect of three-layer insulation.

[0085] In some embodiments, see Figure 10The third side E3 and the fourth side E4 abut against each other to form the second splicing gap G2; the third insulating layer 323 is located only on the side of the pressure strip 31 away from the battery cell 20 and covers the second splicing gap G2.

[0086] In this embodiment, the third side E3 and the fourth side E4 are arranged to abut each other, thus the second splicing gap G2 formed can be ignored. This design allows the second insulating layer 322 to cover the first insulating layer 321 relatively smoothly, and the second insulating layer 322 effectively wraps around the first insulating layer 321, improving the insulation between the pressure strip 31 and the battery cell 20, as well as between the pressure strip 31 and other components in the battery device 100. Furthermore, the third insulating layer 323 can also cover the second insulating layer 322 relatively smoothly, improving the product's aesthetics.

[0087] In some embodiments, the first direction X can be understood as the length direction of the press-fit member 30, and the second direction Y intersecting the first direction X can be understood as the width direction of the press-fit member 30. In the second direction Y, the ratio of the width of the third insulating layer 323 to the width of the pressure strip 31 is 50-100%.

[0088] For example, the ratio of the width of the third insulating layer 323 to the width of the pressure strip 31 can be 50%, 60%, 70%, 80%, 90%, or 100%, depending on the actual needs.

[0089] Understandably, since the third insulating layer 323 covers the third side E3, the fourth side E4, and the area between the third side E3 and the fourth side E4, on the one hand, the width of the third insulating layer 323 is positively correlated with the gap between the third side E3 and the fourth side E4; on the other hand, the wider the third insulating layer 323, the better the insulation performance on the side of the pressure strip 31 close to the third insulating layer 323.

[0090] Specifically, by reasonably setting the ratio of the width of the third insulating layer 323 to the width of the pressure strip 31, a balance is achieved between improving the layering of the second insulating layer 322 and controlling the cost of the insulating layer 32.

[0091] In some embodiments, the third insulating layer 323 is bonded to the second insulating layer 322. Specifically, the bonding method is simple in process and has strong connection reliability.

[0092] In some embodiments, see Figure 8 or Figure 11 Along the circumference of the pressure strip 31, the first side E1 and the second side E2 partially overlap to form a first overlapping area O1, and the first overlapping area O1 extends along the first direction X, and the second insulating layer 322 covers the first overlapping area O1.

[0093] Understandably, along the circumference of the pressure strip 31, the first side E1 and the second side E2 partially overlap. This can be either a portion of the first side E1 covering the surface of the second side E2 away from the pressure strip 31 to form a first overlapping area O1, or a portion of the second side E2 covering the surface of the first side E1 away from the pressure strip 31 to form a first overlapping area O1.

[0094] Specifically, by designing that the first side E1 and the second side E2 partially overlap along the circumference of the pressure strip 31, one side of the first side E1 and the second side E2 presses against the other side, thereby reducing the possibility of one side of the first insulating layer 321 delaminating with the pressure strip 31. Furthermore, by providing a second insulating layer 322 to cover the first overlapping area O1, the second insulating layer 322 can further reduce the possibility of the other side of the first insulating layer 321 delaminating with the pressed side, thereby further improving the reliability of the press-fit component 30.

[0095] In some embodiments, see Figure 11 Along the circumference of the pressure strip 31, the third side E3 and the fourth side E4 partially overlap to form a second overlapping area O2, and the second overlapping area O2 extends along the first direction X, and the third insulating layer 323 covers the second overlapping area O2.

[0096] Understandably, along the circumference of the pressure strip 31, the third side E3 and the fourth side E4 partially overlap. This can be because a portion of the third side E3 covers the surface of the fourth side E4 away from the pressure strip 31 to form a second overlapping area O2, or a portion of the fourth side E4 covers the surface of the third side E3 away from the pressure strip 31 to form a first overlapping area O1.

[0097] Specifically, by designing that the third side E3 and the fourth side E4 partially overlap along the circumference of the pressure strip 31, one side of the third side E3 and the fourth side E4 presses against the other side, thereby reducing the possibility of one side of the second insulating layer 322 easily delaminating with the first insulating layer 321. Furthermore, by providing a third insulating layer 323 to cover the second overlapping area O2, the third insulating layer 323 can further reduce the possibility of the other side of the second insulating layer 322 easily delaminating with the pressed side, thereby further improving the reliability of the press-fit component 30.

[0098] In some embodiments, the housing 10 further includes a base plate 12, with two beams 11 located on one surface of the base plate 12, and both beams 11 extending along a second direction Y; the first direction X intersects the second direction Y. In this embodiment, the first direction X is perpendicular to the second direction Y.

[0099] Furthermore, the press-fit component 30 is located on the side of the battery cell 20 opposite to the base plate 12, and / or, the press-fit component 30 is located on opposite sides of the battery cell 20 along the second direction Y. This application is based on... Figure 2 As shown in the example, the press-fit component 30 is located on the side of the battery cell 20 away from the base plate 12.

[0100] Specifically, by adopting the above technical solution, the press-fit component 30 can fix and constrain the battery cell 20. When the battery device 100 is in a vibration condition, the press-fit component 30 can suppress the vibration amplitude of the battery cell 20.

[0101] In some embodiments, the surface of the press-fit 30 facing the battery cell 20 is also bonded to the battery cell 20.

[0102] This can reduce the occurrence of the pressing component 30 hitting the battery cell 20, and the bonding method is simple to operate and has strong connection reliability, thereby further improving the reliability of the battery device 100.

[0103] In some embodiments, the battery device 100 further includes a buffer layer (not shown) disposed between the press-fit member 30 and the battery cell 20.

[0104] The materials used in the buffer layer include, but are not limited to, silicone, rubber, and epoxy resin. Specifically, silicone, rubber, and epoxy resin all possess excellent insulation and chemical stability; furthermore, silicone and rubber also exhibit flexibility.

[0105] Specifically, the design of the buffer layer prevents the press-fit component 30 from directly contacting the battery cell 20, thereby mitigating the safety risks caused by the press-fit component 30 directly hitting the battery cell 20.

[0106] In a specific embodiment of this application, combined with Figure 2 , Figure 10 as well as Figure 12 The battery device 100 includes a housing 10, a plurality of battery cells 20, and pressing components 30. Specifically, the housing 10 includes two beams 11 arranged opposite each other along a first direction X, one of which is an expansion beam, and the two beams 11 extend along a second direction Y perpendicular to the first direction X; the plurality of battery cells 20 are housed within the housing 10 and located between the two beams 11; there are two pressing components 30 located on the side of the battery cells 20 away from the bottom plate 12 and bonded to the battery cells 20, each pressing component 30 including a pressure strip 31 and an insulating layer 32; the pressure strip 31 extends along the first direction X, and its two ends are respectively connected to the two beams 11; the insulating layer 32 includes a first insulating layer 321, a second insulating layer 322, and a third insulating layer 323.

[0107] The first insulating layer 321 wraps around the pressure strip 31 circumferentially, and the first side E1 and the second sidewall of the first insulating layer 321 abut against each other to form a first splicing gap G1. The first splicing gap G1 is located on the side of the pressure strip 31 close to the battery cell 20. The second insulating layer 322 is bonded and fixed to the first insulating layer 321 and covers the first splicing gap G1. The third side E3 and the fourth side E4 of the second insulating layer 322 extend and are located on the side of the pressure strip 31 away from the battery cell 20. The third insulating layer 323 is bonded and fixed to the second insulating layer 322 and covers the second splicing gap G2. The third insulating layer 323 is only located on the side of the pressure strip 31 away from the battery cell 20, and the width of the third insulating layer 323 is greater than 90% of the width of the pressure strip 31.

[0108] Specifically, in the battery device 100 provided in this application, the press-fit component 30 essentially reduces the deformation of the beams 11 by connecting the front and rear beams 11, and the press-fit component 30 is bonded to the battery cells 20 through an outer structural adhesive, thereby suppressing the expansion force of the battery cells 20 and improving the structural strength of the battery device 100. Furthermore, the pressure strip 31 ensures the insulation reliability of the components within the battery device 100 under specific conditions (such as high temperature, fire, aging, etc.) through multi-layer insulation.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The box body includes at least two beams arranged opposite each other along a first direction; Several battery cells are housed within the box and located between the two beams; The press-fit component includes a pressure strip, a first insulating layer, and a second insulating layer; the pressure strip extends along the first direction, and its two ends are respectively connected to the two beams; Wherein, the first insulating layer wraps around at least a portion of the pressure strip along the circumference of the pressure strip, and along the circumference of the pressure strip, the first insulating layer has a first side and a second side; the second insulating layer at least covers the first side, the second side, and the area between the first side and the second side.

2. The battery device according to claim 1, characterized in that, The first side and the second side abut against each other to form a first splicing gap, and the second insulating layer covers the first splicing gap.

3. The battery device according to claim 1, characterized in that, The first side and the second side are located on the side of the pressure strip closest to the battery cell; The second insulating layer wraps around at least a portion of the first insulating layer along the circumference of the pressure strip, and along the circumference of the pressure strip, the second insulating layer has a third side and a fourth side; wherein the third side and the fourth side are located on the side of the pressure strip opposite to the battery cell.

4. The battery device according to claim 3, characterized in that, The press-fit component further includes a third insulating layer, which at least covers the third side, the fourth side, and the area between the third side and the fourth side.

5. The battery device according to claim 4, characterized in that, The third side abuts against the fourth side to form a second splicing gap; the third insulating layer is located only on the side of the pressure strip away from the battery cell and covers the second splicing gap.

6. The battery device according to claim 5, characterized in that, The ratio of the width of the third insulating layer to the width of the pressure strip is 50-100%.

7. The battery device according to claim 4, characterized in that, The third insulating layer is bonded and fixed to the second insulating layer.

8. The battery device according to claim 1, characterized in that, Along the circumference of the pressure strip, the first side and the second side partially overlap to form a first overlapping area, and the first overlapping area extends along the first direction, and the second insulating layer covers the first overlapping area.

9. The battery device according to claim 4, characterized in that, Along the circumference of the pressure strip, the third side and the fourth side partially overlap to form a second overlapping area, and the second overlapping area extends along the first direction, and the third insulating layer covers the second overlapping area.

10. The battery device according to any one of claims 1-9, characterized in that, The box body also includes a bottom plate, and the two beams are located on one surface of the bottom plate, and both beams extend along a second direction; the first direction intersects the second direction; The press-fit component is located on the side of the battery cell away from the base plate, and / or the press-fit component is located on opposite sides of the battery cell along the second direction.

11. The battery device according to any one of claims 1-9, characterized in that, The surface of the press-fit component facing the battery cell is also bonded to the battery cell.

12. The battery device according to any one of claims 1-9, characterized in that, The battery also includes: A buffer layer is disposed between the press-fit component and the battery cell.

13. An electrical appliance, characterized in that, The battery device includes any one of claims 1-12 above.

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