Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device. The battery monomer assembly is arranged in the box body; the connecting assembly is arranged in the box body and comprises a first pressing strip and an electric connecting bar, the first pressing strip extends in the first direction and is connected to the side, in the second direction, of the battery single body assembly in a pressing mode, and the electric connecting bar is arranged on the side, away from the battery single body assembly, of the first pressing strip and extends in the first direction; the electric connection bar is directly connected with the first pressing bar. According to the battery device disclosed by the utility model, the production and processing cost of the foam can be saved, the assembly process of the connecting assembly is simplified, the assembly efficiency of the connecting assembly is improved, the space occupied by the connecting assembly in the second direction can be reduced, the reliability of the connecting assembly is improved, and the service life of the connecting assembly is prolonged; the space design of the battery device in the second direction is facilitated, and the grouping efficiency of the battery device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] In related technologies, due to the limited space of the battery pack, the overall solution of the battery pack of each system tends to be more extreme. Therefore, how to compress the space occupied by the connectors in the battery pack has gradually become an issue that needs to be solved urgently. Utility Model Content

[0003] In view of the above problems, the present invention provides a battery device that can save production and processing costs, simplify the assembly process of the connecting component, improve the assembly efficiency of the connecting component, and reduce the space occupied by the connecting component in the second direction, thereby improving the reliability of the connecting component and extending the service life of the connecting component.

[0004] In the first aspect, the utility model provides a battery device, comprising: a box body; a battery cell assembly, the battery cell assembly being arranged in the box body; a connecting assembly, the connecting assembly being arranged in the box body and comprising a first pressure strip and an electrical connection bar, the first pressure strip extending along a first direction, the first pressure strip being crimped onto a side of the battery cell assembly along a second direction, the electrical connection bar being arranged on a side of the first pressure strip away from the battery cell assembly and extending along the first direction, the electrical connection bar being directly connected to the first pressure strip, and the first direction and the second direction being perpendicular to each other.

[0005] In the above technical solution, the connecting component includes a first pressure strip and an electrical connection row, both of which extend along the first direction, the first pressure strip is crimped on the side of the battery cell assembly along the second direction, and the electrical connection row is directly connected to the side of the first pressure strip away from the battery cell assembly. Compared with the existing technology, it can save the production and processing cost of foam, eliminate the steps of foam cutting, pre-pressing, etc., simplify the assembly process of the connecting component, improve the assembly efficiency of the connecting component, and reduce the space occupied by the connecting component in the second direction, increase the distance between the connecting component and the box of the battery device in the second direction, improve the reliability of the connecting component, extend the service life of the connecting component, and facilitate the spatial design of the battery device in the second direction and improve the grouping efficiency of the battery device.

[0006] In some embodiments, the first pressure strip includes: a crimping portion, the crimping portion having a crimping surface, the crimping surface being crimped to one side of the battery cell assembly along the second direction; a supporting portion, the supporting portion being located on a side of the crimping portion away from the battery cell assembly, the supporting portion having a supporting surface, the electrical connection row being fixed on the supporting surface, and the supporting surface being not coplanar with the crimping surface.

[0007] In the above technical solution, the crimping surface is used to crimp the battery cell assembly in the second direction, and the supporting surface is used to support the electrical connection row. By limiting the supporting surface and the crimping surface to be non-coplanar, the electrical connection row can be further separated from the end face of the battery cell assembly facing the connection assembly, thereby reducing the possibility of problems such as electrochemical corrosion, increased contact resistance, mechanical stress damage, short circuit risk and thermal runaway.

[0008] In some embodiments, the first pressure strip includes: a crimping portion; a supporting portion, the supporting portion is provided at at least one end of the crimping portion along the third direction, the supporting portion is connected to one end of the crimping portion along the second direction facing the electrical connection row, one end of the supporting portion in the width direction is connected to the crimping portion, and the other end extends along the third direction toward and away from the crimping portion, the electrical connection row is fixed to the side of the supporting portion along the second direction away from the crimping portion, and the third direction is perpendicular to the first direction and the second direction.

[0009] In the above technical solution, a supporting portion is provided at at least one end of the crimping portion along the third direction, the supporting portion extends along a plane perpendicular to the second direction, and the electrical connection row is fixed to the side of the supporting portion away from the crimping portion along the second direction. In the first direction and the third direction, the supporting portion can support the electrical connection row, limit the electrical connection row in the second direction, and reduce the possibility of the electrical connection row shaking along the second direction after assembly is completed. Compared with the pressure strip in the prior art, the supporting area of ​​the first pressure strip for the electrical connection row is increased, so that the fixation of the electrical connection row is more stable and reliable, and the connection reliability of the connection component is improved.

[0010] In some embodiments, the supporting parts are provided at both ends of the crimping part along the third direction, and there are two electrical connection rows, which are respectively provided on the two supporting parts.

[0011] In the above technical solution, by having two electrical connection bars, the cross-sectional area of ​​the electrical connection bar can be increased, the current carrying capacity of the electrical connection bar can be improved, a redundant design of the electrical connection bar can be achieved, the electromagnetic compatibility of the electrical connection bar can be optimized, the inductance and voltage drop can be reduced, and the reliability and stability of the electrical connection bar can be improved. In addition, by providing support portions at both ends of the crimping portion along the third direction, the two support portions are respectively used to support the two electrical connection bars. This allows the first pressure strip to support both electrical connection bars, and the two electrical connection bars are separated in the third direction, making the fixation of the electrical connection bar more stable and reliable, and improving the connection reliability of the connection assembly.

[0012] In some embodiments, along the third direction, an end of the supporting portion facing away from the crimping portion has a flange, and along the second direction, the flange extends toward a side facing away from the crimping portion.

[0013] In the above technical solution, by providing a flange at one end of the supporting part away from the crimping part along the third direction, the flange extends toward the side away from the crimping part along the second direction. The flange can improve the wrapping effect of the supporting part on the electrical connection row, reduce the possibility of the electrical connection row shaking along the third direction after assembly is completed, and further improve the connection reliability of the connection component.

[0014] In some embodiments, the crimping portion includes a first plate, a second plate, and a third plate connected in sequence, the first plate, the second plate, and the third plate all extend along the first direction, and in a cross section perpendicular to the first direction, the second plate extends along the third direction and is used to be crimped on one side of the battery cell assembly along the second direction, the first plate and the third plate are respectively connected to the two ends of the second plate along the third direction, and the first plate and the third plate both extend in a direction away from the battery cell assembly, and the supporting portion is connected to one end of the first plate and / or the second plate that faces away from each other.

[0015] In the above technical solution, the crimping portion includes a first plate, a second plate and a third plate connected in sequence, the second plate is used to be crimped on one side of the battery cell assembly along the second direction, the first plate and the third plate are respectively connected to the two ends of the second plate along the third direction, and the first plate and the third plate both extend in a direction away from the battery cell assembly, which can reduce the weight of the crimping portion while pressing the battery cell assembly, thereby reducing the overall weight of the first pressure strip, which is beneficial to the lightweight connection assembly, can save the materials required for the production of the first pressure strip, and reduce the production and processing costs of the first pressure strip.

[0016] In some embodiments, the electrical connection bar and the first holding strip are bonded and / or connected via fasteners.

[0017] In the above technical solution, by bonding the electrical connection row and the first pressure strip and / or connecting them through fasteners, when the electrical connection row and the first pressure strip are bonded and connected, vibration energy can be absorbed, contact resistance can be reduced, energy loss can be reduced, electrochemical corrosion can be reduced, the service life of the connection component can be extended, and the space utilization rate inside the battery device can be improved, which is conducive to high energy density design; when the electrical connection row and the first pressure strip are connected through fasteners, the production and assembly efficiency of the connection component can be improved, rapid disassembly can be achieved, and the maintenance or cascade utilization of the battery device can be facilitated, thereby relatively reducing the cost of the battery device; when the electrical connection row and the first pressure strip are both bonded and fixed through fasteners, the reliability of the connection between the electrical connection row and the first pressure strip can be increased as much as possible, and the stability of the contact resistance can be improved.

[0018] In some embodiments, the electrical connection bar is used to electrically connect any two of the battery cell assembly, the connector, and the electronic control assembly.

[0019] In the above technical solution, the electrical connection bar is used to electrically connect any two of the battery cell assembly, the connector and the electronic control assembly, so that the battery device can supply power to the generator.

[0020] In some embodiments, the electrical connection row includes: a conductive member extending along the first direction; a wear-resistant layer covering at least a portion of the conductive member along the first direction; and an insulating layer directly covering at least a portion of the wear-resistant layer along the first direction.

[0021] In the above technical solution, the wear-resistant layer protects the conductive components, reducing the risk of wear and tear, thereby extending the service life of the electrical connector. The insulating layer also provides insulation, reducing the risk of short circuits caused by high-voltage arcing during thermal breakdown of the conductive components. This mitigates the risk of thermal runaway explosions within the battery device and improves battery device safety. Furthermore, by directly coating at least a portion of the wear-resistant layer with the insulating layer, the cost of the electrical connector can be reduced, the space occupied by the electrical connector in the second direction can be reduced, and the battery device assembly efficiency can be improved.

[0022] In some embodiments, the conductive member is a copper member or an aluminum member.

[0023] In the above technical solution, by making the conductive parts copper or aluminum, when the conductive parts are copper, it can reduce energy loss, improve the conductivity of the conductive parts, improve the overall efficiency of the battery device, and improve the reliability of the connection of the electrical connection bar, reduce the risk of connection failure due to corrosion, effectively transfer heat, alleviate local overheating, extend the service life of the electrical connection bar, reduce the frequency of maintenance and replacement of the connection components, and improve the safety performance of the battery device; when the conductive parts are aluminum, it can reduce the production and manufacturing cost of the electrical connection bar, reduce the weight of the electrical connection bar, which is conducive to the lightweighting of the connection components, facilitate the production and processing of the conductive parts, improve the corrosion resistance of the conductive parts, and extend the service life of the electrical connection bar.

[0024] In some embodiments, foam is provided on a side of the electrical connection row facing away from the first pressing strip.

[0025] In the above technical solution, foam is provided on the side of the electrical connection bar away from the first pressure strip, and the foam extends along the extension direction of the electrical connection bar. On the one hand, the setting of the foam can absorb vibration, play a buffering role for the electrical connection bar, realize fixed protection of the electrical connection bar, reduce the possibility of cracks in the electrical connection bar due to stress concentration, and extend the service life of the connection component. On the other hand, the side of the electrical connection bar away from the first pressure strip can be isolated from other components to reduce the risk of short circuit.

[0026] In some embodiments, the battery cell assembly includes a plurality of battery cell groups arranged along a third direction, each of the battery cell groups includes a plurality of battery cells arranged along the first direction, and at least two adjacent battery cell groups are provided with the connecting assembly at one end close to each other. Along the third direction, the first pressure strip is simultaneously pressed on the two adjacent battery cell groups, and the third direction is perpendicular to the first direction and the second direction.

[0027] In the above technical solution, the battery cell assembly includes multiple battery cell groups arranged along a third direction, each battery cell group includes multiple battery cells arranged along a first direction. The provision of multiple battery cells can improve the energy density of the battery cell assembly, expand the capacity of the battery device, and improve the endurance of the power-consuming device. The rational arrangement of the multiple battery cells can optimize heat dissipation and thermal management, enhance system stability and performance, improve safety and maintainability, achieve large-scale production, reduce labor costs, and improve production efficiency. In addition, by providing a connecting assembly at one end of at least two adjacent battery cell groups that is close to each other, the first pressure strip is simultaneously pressed onto the two adjacent battery cell groups along the third direction, which can fix the battery cells of the two adjacent battery cell groups, reduce the relative movement of the two adjacent battery cell groups in the second direction, and improve the reliability of the battery cell assembly connection.

[0028] In some embodiments, the battery device further includes: a second pressure strip, which extends along the first direction, and the connecting assembly is provided at one end of two adjacent battery cell groups close to each other, and the second pressure strip is provided at one end of the remaining two adjacent battery cell groups close to each other.

[0029] In the above technical solution, by providing a connecting assembly at one end of some two adjacent battery cell groups close to each other and providing a second pressure strip at one end of the remaining two adjacent battery cell groups close to each other, it can be achieved that a first pressure strip or a second pressure strip is provided between any two adjacent battery cell groups, so that the battery cells of any two adjacent battery cell groups can be fixed, thereby further reducing the relative movement of the two adjacent battery cell groups in the second direction and improving the reliability of the battery cell assembly connection.

[0030] In some embodiments, the pole and the explosion-proof valve of the battery cell are respectively located on opposite sides of the battery cell along the second direction, and the first pressure strip is provided on a side of the battery cell having the pole and is spaced apart from the pole.

[0031] In the above technical solution, by locating the poles and explosion-proof valves of the battery cell on opposite sides of the battery cell along the second direction, in extreme cases such as thermal runaway, high-temperature, high-pressure airflow and toxic gases can be quickly released along the bottom exhaust channel, achieving thermal and electrical separation, reducing the impact of thermal runaway, alleviating the hazards caused by thermal runaway, and greatly improving the safety performance of the battery device.

[0032] In some embodiments, a connecting piece is provided on one side of the battery cell having the pole, which is used to electrically connect two adjacent battery cells located in the same battery cell group. The battery device also includes: an insulating member, which is provided on the side of the connecting piece away from the battery cell and extends along the first direction.

[0033] In the above technical solution, by providing an insulating member on the side of the connecting piece away from the battery cell, the insulating member can play the role of physical isolation and functional enhancement, thereby improving the reliability and safety of the connecting piece, extending the service life of the connecting piece, and improving the safety performance of the battery device.

[0034] In some embodiments, the insulating member is mica paper or an insulating film.

[0035] In the above technical solution, by making the insulating member mica paper or insulating film, the protection scheme for the connecting piece can be reduced, the cost of the insulating member can be reduced, the space occupied by the insulating member in the second direction can be reduced, and the grouping efficiency of the battery device can be improved.

[0036] In a second aspect, the present invention provides an electrical device including the above-mentioned battery device.

[0037] In the above technical solution, the above-mentioned battery device is provided, and the connecting component includes a first pressure strip and an electrical connection row. The first pressure strip and the electrical connection row both extend along the first direction, and the first pressure strip is crimped on the side of the battery cell assembly along the second direction. The electrical connection row is directly connected to the side of the first pressure strip away from the battery cell assembly. Compared with the existing technology, it can save the production and processing cost of foam, eliminate the steps of foam cutting, pre-pressing, etc., simplify the assembly process of the connecting component, improve the assembly efficiency of the connecting component, and reduce the space occupied by the connecting component in the second direction, increase the distance between the connecting component and the box of the battery device in the second direction, improve the reliability of the connecting component, extend the service life of the connecting component, and facilitate the spatial design of the battery device in the second direction and improve the grouping efficiency of the battery device.

[0038] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 is a perspective view of a connection assembly of a battery device according to some embodiments of the present invention;

[0041] Figure 2 is a perspective view of a first pressure strip of a connection assembly of a battery device according to some embodiments of the present invention;

[0042] Figure 3 yes Figure 2 Enlarged view of point C in the middle;

[0043] Figure 4 is a perspective view of an electrical connection bar of a connection assembly of a battery device according to some embodiments of the present invention;

[0044] Figure 5 is a perspective view of a connection assembly of a battery device according to some embodiments of the present invention, wherein the first pressure strip is not shown;

[0045] Figure 6 is a top view of a connection assembly of a battery device according to some embodiments of the present invention, wherein the first pressure strip is not shown;

[0046] Figure 7 is a side view of a connection assembly of a battery device according to some embodiments of the present invention, wherein the first pressure strip is not shown;

[0047] Figure 8 It is along Figure 7 Cross-sectional view along the mid-DD line;

[0048] Figure 9 yes Figure 8 Enlarged view of point E in the middle;

[0049] Figure 10 A perspective view of a battery cell assembly and an insulating member of a battery device according to some embodiments of the present invention;

[0050] Figure 11 is an exploded view of a battery cell assembly and an insulating member of a battery device according to some embodiments of the present invention;

[0051] Figure 12 Schematic diagram of an electrical device according to some embodiments of the present invention.

[0052] Reference numerals:

[0053] 1000. Electrical devices;

[0054] 100. Battery device;

[0055] 10. Connect components;

[0056] 1. First pressing strip; 11. Pressing portion; 111. First plate; 112. Second plate; 113. Third plate; 114. Pressing groove; 12. Supporting portion; 121. Flanging;

[0057] 2. Electrical connection bar; 21. Conductive member; 22. Protective layer; 23. Foam;

[0058] 20. Battery cell assembly; 201. Battery cell; 202. Terminal; 203. Connecting piece;

[0059] 30. Insulation parts;

[0060] 200. Car body. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0062] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of the application of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification and claims of this utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0063] Reference to an "embodiment" in this disclosure means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0064] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0065] In this application, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0066] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present invention, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are for illustrative purposes only and do not constitute any limitation on the present invention.

[0067] The term “plurality” used in this invention refers to two or more (including two).

[0068] In the embodiments of the present invention, unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0069] In the embodiments of the present invention, unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0070] In embodiments of the present invention, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or parallel via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0071] The battery device may be a battery pack, which includes a housing and one or more battery cell assemblies housed within the housing. The battery cell assemblies may be battery modules, which may be housed within the housing by securing the battery module within the housing. Alternatively, the battery cell assembly may be housed within the housing by directly securing multiple battery cells to the housing.

[0072] In an embodiment of the present invention, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to accommodate the battery cell assembly. Enclosed herein means covered or closed, and may be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame to form an enclosed space within the housing to accommodate the battery cell assembly.

[0073] In an embodiment of the present invention, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0074] In the embodiments of the present invention, the battery cells may be secondary batteries, which are batteries that can be recharged to activate the active materials after discharge and continue to be used. The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of the present invention are not limited to this. The battery cells may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present invention are not limited to this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of the present invention are not limited to this.

[0075] A battery cell is the smallest energy unit in a battery device. It includes a housing and an electrode assembly disposed within the housing. The electrode assembly is the component within the battery cell where the electrochemical reaction occurs. The housing may contain one or more electrode assemblies. The electrode assembly is primarily formed by winding or stacking positive and negative electrode sheets, and a separator is typically provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab.

[0076] The positive electrode sheet may include a positive electrode current collector and a positive electrode film layer disposed on at least one surface of the positive electrode current collector, wherein the positive electrode film layer includes a positive electrode active material.

[0077] As an example, the positive electrode current collector has two surfaces opposite to each other in its thickness direction, and the positive electrode film layer is disposed on either or both of the two opposite surfaces of the positive electrode current collector.

[0078] As an example, the positive electrode current collector may be a metal foil or a composite current collector.

[0079] The negative electrode sheet may include a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, wherein the negative electrode film layer includes a negative electrode active material.

[0080] As an example, the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode film layer is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0081] As an example, the negative electrode current collector may be a metal foil, a foamed metal, or a composite current collector.

[0082] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As the application of power batteries continues to expand, market demand is also growing.

[0083] In the related art, the holding strips and the electrical connection bars are often indirectly bonded via foam, which results in high production and processing costs, occupies a large Z-direction space, and reduces the battery assembly efficiency.

[0084] Based on this, the utility model proposes a battery device including: a box body; a battery cell assembly, the battery cell assembly is arranged in the box body; a connecting assembly, the connecting assembly is arranged in the box body and includes a first pressure strip and an electrical connection bar, the first pressure strip extends along the first direction, the first pressure strip is crimped on the side of the battery cell assembly along the second direction, the electrical connection bar is arranged on the side of the first pressure strip away from the battery cell assembly and extends along the first direction, the electrical connection bar is directly connected to the first pressure strip, and the first direction and the second direction are perpendicular to each other.

[0085] In the above-mentioned battery device, the connecting component includes a first pressure strip and an electrical connection row, both of which extend along the first direction, the first pressure strip is crimped on the side of the battery cell assembly along the second direction, and the electrical connection row is directly connected to the side of the first pressure strip away from the battery cell assembly. Compared with the existing technology, it can save the production and processing cost of foam, eliminate the steps of foam cutting, pre-pressing, etc., simplify the assembly process of the connecting component, improve the assembly efficiency of the connecting component, and reduce the space occupied by the connecting component in the second direction, increase the distance between the connecting component and the box of the battery device in the second direction, improve the reliability of the connecting component, extend the service life of the connecting component, and be beneficial to the spatial design of the battery device in the second direction and improve the grouping efficiency of the battery device.

[0086] The battery device disclosed in the embodiments of the present invention can be used in electrical equipment that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. In addition to being used in vehicles, the battery device can also be used in, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0087] The power-consuming device disclosed in the embodiments of the present invention may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device is provided inside the vehicle, and the battery device may be provided at the bottom, head or tail of the vehicle. The battery device may be used to power the vehicle, for example, the battery device may serve as an operating power source for the vehicle. The vehicle may further include a controller and a motor, and the controller is used to control the battery device to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the present invention, the battery device may serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0088] Reference below Figures 1-11 A battery device 100 according to an embodiment of the present invention is described.

[0089] refer to Figure 10 and Figure 11 In the first aspect, the present invention provides a battery device 100 including a box, a battery cell assembly 20 and a connection assembly 10. The battery cell assembly 20 is arranged in the box, and the connection assembly 10 is arranged in the box and includes a first pressure strip 1 and an electrical connection bar 2. The first pressure strip 1 is arranged along a first direction (such as Figure 1The first pressure strip 1 is pressed against the battery cell assembly 20 along the second direction (as shown). Figure 2 As shown in FIG, the electrical connection bar 2 is provided on one side of the first pressure strip 1 away from the battery cell assembly 20 and extends along the first direction. The electrical connection bar 2 is directly connected to the first pressure strip 1, and the first direction and the second direction are perpendicular to each other.

[0090] It can be understood that the first pressure strip 1 is crimped onto one side of the battery cell assembly 20 along the second direction, and is used to limit the movement of the battery cell assembly 20 in the second direction, thereby improving the reliability of the battery device 100. The electrical connection bar 2 is fixed to the side of the first pressure strip 1 along the second direction away from the battery cell assembly 20, and is used to electrically connect the battery cell assembly 20 to the connector to power the generator. The first pressure strip 1 can separate the electrical connection bar 2 from the battery cell assembly 20, thereby reducing the possibility of problems such as electrochemical corrosion, increased contact resistance, mechanical stress damage, short circuit risk and thermal runaway.

[0091] In the prior art, the pressure strip and the electrical connection row are often indirectly bonded through foam, which has high production and processing costs, occupies a large Z-direction space, and reduces the grouping efficiency of the battery device. The utility model directly connects the electrical connection row 2 with the first pressure strip 1, which can save the production and processing costs of the foam 23, eliminate the steps of cutting and pre-pressing the foam 23, simplify the assembly process of the connection component 10, improve the assembly efficiency of the connection component 10, and reduce the space occupied by the connection component 10 in the second direction, increase the distance between the connection component 10 and the box of the battery device 100 in the second direction, improve the reliability of the connection component 10, extend the service life of the connection component 10, and facilitate the spatial design of the battery device 100 in the second direction, thereby improving the grouping efficiency of the battery device 100.

[0092] Furthermore, the first bead 1 is a composite bead. On the one hand, the composite material improves the specific strength of the first bead 1 through the synergistic effect of fiber reinforcement and matrix resin, which can not only improve the strength of the first bead 1, but also facilitate the lightweighting of the first bead 1. On the other hand, the composite material has good corrosion resistance and fatigue resistance, which can improve the reliability and stability of the first bead 1 and extend the service life of the first bead 1.

[0093] Among them, the box body can protect components such as the battery cell assembly 20 and the connecting assembly 10, resist external impact and extrusion, and reduce damage to components such as the battery cell assembly 20 and the connecting assembly 10. In addition, the box body has moisture-proof, dust-proof and corrosion-resistant functions, which can reduce the impact of external environmental factors on components such as the battery cell assembly 20 and the connecting assembly 10.

[0094] It should be noted that the first pressure strip 1 is bonded to one side of the battery cell assembly 20 along the second direction, which can improve the reliability of the connection between the first pressure strip 1 and the battery cell assembly 20, so that the first pressure strip 1 limits the movement of the battery cell assembly 20 in the second direction, and the electrical connection bar 2 is fixed to the side of the first pressure strip 1 away from the battery cell assembly 20. The first pressure strip 1 can separate the electrical connection bar 2 from the battery cell assembly 20, reducing the possibility of problems such as electrochemical corrosion, increased contact resistance, mechanical stress damage, short circuit risk and thermal runaway.

[0095] In the above technical solution, the connecting component 10 includes a first pressure strip 1 and an electrical connection bar 2, and the first pressure strip 1 and the electrical connection bar 2 both extend along the first direction. The first pressure strip 1 is crimped on the side of the battery cell assembly 20 along the second direction, and the electrical connection bar 2 is directly connected to the side of the first pressure strip 1 away from the battery cell assembly 20. Compared with the existing technology, the production and processing cost of the foam 23 can be saved, and the steps of cutting and pre-pressing the foam 23 can be eliminated, the assembly process of the connecting component 10 can be simplified, and the assembly efficiency of the connecting component 10 can be improved. It can also reduce the space occupied by the connecting component 10 in the second direction, increase the distance between the connecting component 10 and the box of the battery device 100 in the second direction, improve the reliability of the connecting component 10, and extend the service life of the connecting component 10, which is beneficial to the spatial design of the battery device 100 in the second direction and improves the grouping efficiency of the battery device 100.

[0096] In some embodiments, reference Figure 1 、 Figure 2 and Figure 3 As shown, the first pressure strip 1 includes a crimping portion 11 and a supporting portion 12. The crimping portion 11 has a crimping surface, which is crimped to one side of the battery cell assembly 20 along the second direction. The supporting portion 12 is located on the side of the crimping portion 11 that is away from the battery cell assembly 20. The supporting portion 12 has a supporting surface, and the electrical connection row 2 is fixed on the supporting surface. The supporting surface and the crimping surface are not coplanar.

[0097] In the above technical solution, the crimping surface is used to crimp the battery cell assembly 20 in the second direction, and the supporting surface is used to support the electrical connection bar 2. By limiting the supporting surface and the crimping surface to be non-coplanar, the electrical connection bar 2 and the end face of the battery cell assembly 20 facing the connection assembly 10 can be further spaced apart, thereby reducing the possibility of problems such as electrochemical corrosion, increased contact resistance, mechanical stress damage, short circuit risk and thermal runaway.

[0098] In some embodiments, reference Figure 1 、 Figure 2 and Figure 3 As shown, the first pressure strip 1 includes a pressing portion 11 and a supporting portion 12. The pressing portion 11 is along the third direction (eg Figure 3At least one end of the crimping portion 11 is provided with a supporting portion 12, the supporting portion 12 is connected to one end of the crimping portion 11 along the second direction toward the electrical connection row 2, and the width direction of the supporting portion 12 (see attached Figure 3 One end of the electrical connection row 2 is connected to the crimping portion 11, and the other end extends along the third direction toward a direction away from the crimping portion 11. The electrical connection row 2 is fixed to the side of the supporting portion 12 away from the crimping portion 11 along the second direction, and the third direction is perpendicular to the first direction and the second direction.

[0099] It can be understood that in the prior art, the bottom of the pressure strip is fixed on the shoulders of two adjacent battery cells to press the adjacent battery cells, and the electrical connection row is fixed to the top of the pressure strip by foam bonding. The utility model provides a supporting portion 12 at at least one end of the crimping portion 11 along the third direction, and the supporting portion 12 extends along a plane perpendicular to the second direction. The electrical connection row 2 is fixed to the side of the supporting portion 12 away from the crimping portion 11 along the second direction. In the first direction and the third direction, the supporting portion 12 can support the electrical connection row 2. Compared with the pressure strip in the prior art, the supporting area of ​​the first pressure strip 1 for the electrical connection row 2 is increased, so that the fixation of the electrical connection row 2 is more stable and reliable, thereby improving the connection reliability of the connection component 10.

[0100] It can be understood that a supporting portion 12 is provided at at least one end of the crimping portion 11 along the third direction. The supporting portion 12 may be provided at only one end of the crimping portion 11 along the third direction, and the supporting portion 12 extends in a direction away from the crimping portion 11 along the third direction. Alternatively, a supporting portion 12 may be provided at both ends of the crimping portion 11 along the third direction, and the two supporting portions 12 extend in directions away from each other along the third direction, and can be used to support two electrical connection rows 2.

[0101] In the above technical solution, a supporting portion 12 is provided at at least one end of the crimping portion 11 along the third direction, and the supporting portion 12 extends along a plane perpendicular to the second direction. The electrical connection row 2 is fixed to the side of the supporting portion 12 away from the crimping portion 11 along the second direction. In the first direction and the third direction, the supporting portion 12 can support the electrical connection row 2, limit the electrical connection row 2 in the second direction, and reduce the possibility of the electrical connection row 2 shaking along the second direction after assembly is completed. Compared with the pressure strip in the prior art, the supporting area of ​​the first pressure strip 1 for the electrical connection row 2 is increased, so that the fixation of the electrical connection row 2 is more stable and reliable, and the connection reliability of the connection component 10 is improved.

[0102] In some embodiments, Figure 1 , Attachment Figure 2 and attached Figure 3 Both ends of the crimping portion 11 along the third direction are provided with supporting portions 12 , and there are two electrical connection bars 2 , which are respectively provided on the two supporting portions 12 .

[0103] It should be noted that the battery cell assembly 20 has a total positive and a total negative, and the two electrical connection bars 2 extend along the third direction. The two ends of the electrical connection bar 2 along the third direction are respectively the first end and the second end. The first ends of the two electrical connection bars 2 are respectively electrically connected to the total positive and total negative of the battery cell assembly 20, and the second ends of the two electrical connection bars 2 are electrically connected to the connector.

[0104] In the above technical solution, by having two electrical connection bars 2, the cross-sectional area of ​​the electrical connection bars 2 can be increased, the current carrying capacity of the electrical connection bars 2 can be improved, a redundant design of the electrical connection bars 2 can be achieved, the electromagnetic compatibility of the electrical connection bars 2 can be optimized, the inductance and voltage drop can be reduced, and the reliability and stability of the electrical connection bars 2 can be improved. In addition, by providing supporting portions 12 at both ends of the crimping portion 11 along the third direction, the two supporting portions 12 are respectively used to support the two electrical connection bars 2, so that the first pressure strip 1 can support both electrical connection bars 2 and separate the two electrical connection bars 2 in the third direction, making the fixation of the electrical connection bars 2 more stable and reliable, and improving the connection reliability of the connection assembly 10.

[0105] In some embodiments, refer to the attached Figure 3 As shown, along the third direction, the end of the supporting portion 12 away from the crimping portion 11 has a flange 121 , and along the second direction, the flange 121 extends toward the side away from the crimping portion 11 .

[0106] In a specific example, see the attached Figure 3 As shown, supporting parts 12 are provided at both ends of the crimping part 11 along the third direction, and the ends of the two supporting parts 12 facing away from each other have flanges 121, and the two flanges 121 extend along the second direction toward the side facing away from the crimping part 11, which can improve the wrapping effect of the two supporting parts 12 on the two electrical connection rows 2, reduce the possibility of the electrical connection rows 2 shaking along the third direction after assembly is completed, and further improve the connection reliability of the connection component 10.

[0107] In the above technical solution, by providing a flange 121 at one end of the supporting portion 12 away from the crimping portion 11 along the third direction, and extending toward the side away from the crimping portion 11 along the second direction, the flange 121 can improve the wrapping effect of the supporting portion 12 on the electrical connection row 2, reduce the possibility of the electrical connection row 2 shaking along the third direction after assembly is completed, and further improve the connection reliability of the connection component 10.

[0108] In some embodiments, referring to the Figure 3As shown, the crimping portion 11 includes a first plate 111, a second plate 112 and a third plate 113 connected in sequence, and the first plate 111, the second plate 112 and the third plate 113 all extend along the first direction. In a cross section perpendicular to the first direction, the second plate 112 extends along the third direction and is used to be crimped on one side of the battery cell assembly 20 along the second direction. The first plate 111 and the third plate 113 are respectively connected to the two ends of the second plate 112 along the third direction, and the first plate 111 and the third plate 113 both extend in a direction away from the battery cell assembly 20, and the supporting portion 12 is connected to the end of the first plate 111 and / or the third plate 113 that are away from each other.

[0109] It should be noted that the first plate 111, the second plate 112 and the third plate 113 jointly define a crimping groove 114, so that the side of the crimping portion 11 facing away from the electrical connection row 2 can still be used to press the battery cell assembly 20, and the setting of the crimping groove 114 can reduce the weight of the crimping portion 11, thereby reducing the overall weight of the first pressure strip 1, which is beneficial to the lightweight connection assembly 10, can save the materials required for the production of the first pressure strip 1, and reduce the production and processing costs of the first pressure strip 1.

[0110] In the above technical solution, the crimping portion 11 includes a first plate 111, a second plate 112 and a third plate 113 connected in sequence. The second plate 112 is used to be crimped on one side of the battery cell assembly 20 along the second direction. The first plate 111 and the third plate 113 are respectively connected to the two ends of the second plate 112 along the third direction, and the first plate 111 and the third plate 113 both extend in a direction away from the battery cell assembly 20. While pressing the battery cell assembly 20, the weight of the crimping portion 11 can be reduced, thereby reducing the overall weight of the first pressure strip 1, which is beneficial to the lightweighting of the connecting assembly 10, can save the materials required for the production of the first pressure strip 1, and reduce the production and processing costs of the first pressure strip 1.

[0111] In some embodiments, the electrical connection bar 2 and the first holding strip 1 are bonded and / or connected via fasteners.

[0112] It is understandable that the electrical connection bar 2 and the first pressure strip 1 can be connected only by bonding, connected only by fasteners, or both bonded and fixed by fasteners.

[0113] When the electrical connection bar 2 and the first pressure strip 1 are bonded together, the microscopic unevenness on the surface of the electrical connection bar 2 and the first pressure strip 1 can be filled, vibration energy can be absorbed, contact resistance can be reduced, energy loss can be reduced, and electrochemical corrosion between the electrical connection bar 2 and the first pressure strip 1 can be reduced, thereby extending the service life of the connection assembly 10. At the same time, less space is required to bond the electrical connection bar 2 and the first pressure strip 1, which can improve the space utilization inside the battery device 100 and is conducive to high energy density design.

[0114] When the electrical connection bar 2 and the first pressure strip 1 are connected by fasteners, the fastener connection does not require curing time, which can improve the production and assembly efficiency of the connection component 10 and is suitable for large-scale production. The fastener connection can also be quickly disassembled, which facilitates the maintenance or cascade utilization of the battery device 100 and relatively reduces the cost of the battery device 100.

[0115] When the electrical connection bar 2 and the first pressure strip 1 are both adhesively connected and fixed by fasteners, the bonding can provide long-term stability, and the fasteners can reduce displacement before curing, thereby maximizing the reliability of the connection between the electrical connection bar 2 and the first pressure strip 1 and improving the stability of the contact resistance.

[0116] For example, the fastener may be a cable tie, and the electrical connection row 2 may be fixed to the first pressure strip 1 by the cable tie. The cable tie is light in weight and can reduce the overall weight of the connection assembly 10, thereby contributing to the lightweighting of the battery device 100 and improving the cruising range of the electrical device 1000.

[0117] In the above technical solution, by bonding the electrical connection bar 2 and the first pressure strip 1 and / or connecting them through fasteners, when the electrical connection bar 2 and the first pressure strip 1 are bonded and connected, vibration energy can be absorbed, contact resistance can be reduced, energy loss can be reduced, electrochemical corrosion can be reduced, the service life of the connection component 10 can be extended, and the space utilization rate inside the battery device 100 can be improved, which is conducive to high energy density design; when the electrical connection bar 2 and the first pressure strip 1 are connected through fasteners, the production and assembly efficiency of the connection component 10 can be improved, rapid disassembly can be achieved, and the maintenance or cascade utilization of the battery device 100 can be facilitated, thereby relatively reducing the cost of the battery device 100; when the electrical connection bar 2 and the first pressure strip 1 are both bonded and fixed through fasteners, the reliability of the connection between the electrical connection bar 2 and the first pressure strip 1 can be increased as much as possible, and the stability of the contact resistance can be improved.

[0118] In some embodiments, the electrical connection bar 2 is used to electrically connect any two of the battery cell assemblies 20 , the connector, and the electronic control assembly.

[0119] It is understandable that the electrical connection bar 2 can be used to electrically connect the battery cell assembly 20 and the connector, or the electrical connection bar 2 can be used to electrically connect the battery cell assembly 20 and the electronic control assembly, or the electrical connection bar 2 can be used to electrically connect the electronic control assembly and the connector.

[0120] It should be noted that the electrical connection bar 2 is limited to electrically connecting any two of the battery cell assemblies 20, the connector, and the electronic control assembly to power the generator. Furthermore, the electrical connection bar 2 is fixed to the side of the first pressure strip 1 that faces away from the battery cell assemblies 20 in the second direction. The first pressure strip 1 can separate the electrical connection bar 2 from the battery cell assemblies 20, thereby reducing the likelihood of problems such as electrochemical corrosion, increased contact resistance, mechanical stress damage, short circuit risks, and thermal runaway. For example, the electronic control assembly can be a high-voltage box or other component.

[0121] In the above technical solution, the electrical connection bar 2 is used to electrically connect any two of the battery cell assemblies 20 , the connector, and the electronic control assembly, so that the battery device 100 can supply power to the generator.

[0122] In some embodiments, refer to the attached Figure 4 , Attachment Figure 7 and attached Figure 8 As shown, the electrical connection bar 2 includes a conductive member 21, a wear-resistant layer and an insulating layer. The conductive member 21 extends along a first direction. Along the first direction, the wear-resistant layer is coated on at least a portion of the conductive member 21. Along the first direction, the insulating layer is directly coated on at least a portion of the wear-resistant layer.

[0123] It should be noted that if Figure 8 As shown, the wear-resistant layer and the insulating layer together form a protective layer 22 of the electrical connection bar 2. The protective layer 22 can protect the conductive member 21. Specifically, the wear-resistant layer is used to protect the conductive member 21, reduce the risk of wear of the conductive member 21, and increase the service life of the electrical connection bar 2. The insulating layer can play an insulating role, reduce the high-voltage arc generated by the conductive member 21 when it breaks down due to heat and cause a short circuit, improve the problem of thermal runaway explosion in the battery device 100, and improve the safety of the battery device 100.

[0124] In a specific example, the wear-resistant layer is a braided sleeve, which is woven with high-strength fibers or metal wires and has the characteristics of high strength and high toughness. The unique mesh structure can effectively disperse friction, reduce local stress concentration, and extend the service life of the conductive part 21. In addition, the braided sleeve is easy to assemble, which can improve the assembly efficiency of the wear-resistant layer. The braided sleeve can reduce the possibility of scratching the surface of the conductive part 21, improve contact stability, and optimize electrical performance. At the same time, the cost of the braided sleeve is relatively low and the weight is light, which can reduce the production cost of the electrical connection row 2, which is conducive to the lightweight connection component 10.

[0125] Furthermore, the insulating layer is made of PA12 (polylaurolactam, also known as nylon 12). PA12 has extremely high volume resistivity and surface resistivity, which can reduce the probability of current passing through, reduce the occurrence of faults such as short circuits and leakage, and improve the safety performance of the electrical connection bar 2. In addition, PA12 has good chemical stability, heat resistance and low water absorption, which can improve the stability of the insulating layer and improve the reliability of the electrical insulation performance of the insulating layer.

[0126] It can be understood that along the first direction, the insulating layer directly covers at least a portion of the wear-resistant layer, that is, the insulating layer and the wear-resistant layer achieve a covering relationship through close contact fit, and in the cross section perpendicular to the first direction, there are no other components between the insulating layer and the wear-resistant layer.

[0127] In the prior art, since the pole and the explosion-proof valve of the battery cell are located on the same side of the battery cell, in extreme cases such as thermal runaway, high-temperature, high-pressure airflow and toxic gases will be ejected from the explosion-proof valve, causing a sharp rise in temperature and fire. Therefore, a wear-resistant layer, a fire-proof layer and an insulating layer are sequentially designed on the main body of the electrical connection row to prevent the electrical connection row from causing greater damage due to high-voltage ignition caused by the reduction of the electrical gap, resulting in a higher cost of the electrical connection row, occupying a larger Z-direction space, and reducing the grouping efficiency of the battery device. The pole 202 and the explosion-proof valve of the battery cell 201 of the utility model are respectively located on the battery cell 201 along the second direction. On the opposite sides of the second direction, in extreme cases such as thermal runaway, high-temperature and high-pressure airflow and toxic gases can be quickly released along the bottom exhaust channel, and the safety performance of the battery device 100 is relatively higher, so the protection scheme of the electrical connection bar 2 can be reduced to a certain extent. Therefore, the fireproof layer wrapped around the conductive member 21 is cancelled, so that the wear-resistant layer and the insulating layer are directly bonded, which can reduce the cost of the electrical connection bar 2, reduce the space occupied by the electrical connection bar 2 in the second direction, and improve the grouping efficiency of the battery device 100. Alternatively, the space saved by the electrical connection bar 2 in the second direction can be used for the battery cell 201 to reduce the cost of the battery cell 201.

[0128] In the above-described technical solution, the wear-resistant layer protects the conductive member 21, reducing the risk of wear of the conductive member 21 and thereby increasing the service life of the electrical connection bar 2. The insulating layer also provides insulation, reducing the risk of short circuits caused by high-voltage arcing during thermal breakdown of the conductive member 21, thereby alleviating the risk of thermal runaway explosions within the battery device 100 and improving the safety of the battery device 100. Furthermore, by directly coating at least a portion of the wear-resistant layer with the insulating layer, the cost of the electrical connection bar 2 can be reduced, the space occupied by the electrical connection bar 2 in the second direction can be reduced, and the battery device 100 assembly efficiency can be improved.

[0129] In some embodiments, the conductive member 21 is a copper member or an aluminum member.

[0130] When the conductive member 21 is a copper member, copper has an extremely low resistivity, can efficiently transmit current, reduce energy loss, improve the conductivity of the conductive member 21, and improve the overall efficiency of the battery device 100. Copper has the characteristics of high strength, good toughness, strong corrosion resistance, and good heat dissipation performance. It can improve the reliability of the connection of the electrical connection bar 2, reduce the risk of connection failure due to corrosion, effectively transfer heat, alleviate local overheating, extend the service life of the electrical connection bar 2, reduce the frequency of maintenance and replacement of the connection component 10, and improve the safety performance of the battery device 100.

[0131] When the conductive part 21 is an aluminum part, the cost of aluminum is relatively low, which can reduce the production and manufacturing cost of the electrical connection bar 2. The light weight of aluminum can reduce the weight of the electrical connection bar 2, which is beneficial to the lightweight connection component 10. Aluminum has good ductility and plasticity, which can facilitate the production and processing of the conductive part 21, and a dense oxide film is easily formed on the surface of aluminum, which can effectively improve further oxidation, enhance the corrosion resistance of the conductive part 21, and extend the service life of the electrical connection bar 2.

[0132] In the above technical solution, by making the conductive part 21 a copper part or an aluminum part, when the conductive part 21 is a copper part, it can reduce energy loss, improve the conductivity of the conductive part 21, improve the overall efficiency of the battery device 100, and improve the reliability of the connection of the electrical connection bar 2, reduce the risk of connection failure due to corrosion, effectively transfer heat, alleviate local overheating, extend the service life of the electrical connection bar 2, reduce the frequency of maintenance and replacement of the connection component 10, and improve the safety performance of the battery device 100; when the conductive part 21 is an aluminum part, it can reduce the production and manufacturing cost of the electrical connection bar 2, reduce the weight of the electrical connection bar 2, which is conducive to the lightweighting of the connection component 10, facilitate the production and processing of the conductive part 21, improve the corrosion resistance of the conductive part 21, and extend the service life of the electrical connection bar 2.

[0133] In some embodiments, refer to the attached Figure 5 , Attachment Figure 6 and attached Figure 9 As shown, a foam 23 is provided on the side of the electrical connection bar 2 facing away from the first pressure strip 1 .

[0134] In the above technical solution, a foam 23 is provided on the side of the electrical connection bar 2 away from the first pressure strip 1, and the foam 23 extends along the extension direction of the electrical connection bar 2 (see the attached Figure 5 On the one hand, the setting of the foam 23 can absorb vibrations and play a buffering role on the electrical connection bar 2, thereby achieving fixed protection for the electrical connection bar 2, reducing the possibility of cracks in the electrical connection bar 2 due to stress concentration, and extending the service life of the connection component 10. On the other hand, the side of the electrical connection bar 2 facing away from the first pressure strip 1 can be isolated from other components to reduce the risk of short circuit.

[0135] In some embodiments, refer to the attached Figure 10 and attached Figure 11 As shown, the battery cell assembly 20 includes a plurality of battery cell groups arranged along a third direction, each battery cell group includes a plurality of battery cells 201 arranged along a first direction, and a connecting assembly 10 is provided at one end close to each other of at least some adjacent two battery cell groups. Along the third direction, the first pressure strip 1 is simultaneously pressed on the two adjacent battery cell groups, and the third direction is perpendicular to the first direction and the second direction.

[0136] For example, the battery cell assembly 20 may include two, three, four, six, or eight battery cell groups arranged along the third direction, and each battery cell group may include four, eight, sixteen, twenty, twenty-six, thirty, or thirty-two battery cells arranged along the first direction.

[0137] In a specific example, see the attached Figure 10 and attached Figure 11 As shown, the battery cell assembly 20 includes six battery cell groups arranged along the third direction, each battery cell group includes thirty-two battery cells 201 arranged along the first direction, and a connecting assembly 10 is provided on an adjacent pair of the six battery cell groups. The connecting assembly 10 is pressed on the pair of battery cell groups at the same time to fix the battery cells 201 of the two battery cell groups, reduce the relative movement of the two adjacent battery cell groups in the second direction, and improve the reliability of the connection of the battery cell assembly 20.

[0138] In the above technical solution, the battery cell assembly 20 includes multiple battery cell groups arranged along a third direction, each battery cell group includes multiple battery cells 201 arranged along a first direction. The arrangement of multiple battery cells 201 can improve the energy density of the battery cell assembly 20, expand the capacity of the battery device 100, and improve the endurance of the power-consuming device 1000. By rationally arranging the multiple battery cells 201, heat dissipation and thermal management can be optimized, system stability and performance can be enhanced, safety and maintainability can be improved, large-scale production can be achieved, labor costs can be reduced, and production efficiency can be improved. In addition, by providing a connecting assembly 10 at one end of at least two adjacent battery cell groups close to each other, the first pressure strip 1 is simultaneously pressed onto the two adjacent battery cell groups along the third direction, which can fix the battery cells 201 of the two adjacent battery cell groups, reduce the relative movement of the two adjacent battery cell groups in the second direction, and improve the reliability of the connection of the battery cell assembly 20.

[0139] In some embodiments, the battery device 100 further includes a second pressure strip extending along the first direction. Some adjacent battery cell groups are provided with a connecting assembly 10 at one end close to each other, and the remaining adjacent battery cell groups are provided with a second pressure strip at one end close to each other.

[0140] Specifically, the first pressure strip 1 includes a crimping portion 11 and a supporting portion 12 arranged and connected in the third direction. The crimping portion 11 is used to press the battery cells 201 of two adjacent battery cell groups, and the supporting portion 12 is used to support the electrical connection bar 2. The electrical connection bar 2 does not need to be placed on the second pressure strip, and is only used to press the battery cells 201 of two adjacent battery cell groups. Therefore, the second pressure strip only needs to include the second crimping portion 11 extending along the first direction.

[0141] In a specific example, the battery cell assembly 20 includes six battery cell groups arranged along a third direction, each battery cell group includes thirty-two battery cells 201 arranged along a first direction, a pair of adjacent battery cell groups among the six battery cell groups is provided with a connecting assembly 10, and the remaining four pairs of adjacent battery cell groups are provided with a second pressure strip at one end close to each other. Through the cooperation of the first pressure strip 1 and the second pressure strip, the battery cells 201 of any two adjacent battery cell groups can be fixed, thereby further reducing the relative movement of the two adjacent battery cell groups in the second direction and improving the reliability of the connection of the battery cell assembly 20.

[0142] In the above technical solution, by providing a connecting assembly 10 at one end close to each other of some adjacent battery cell groups and providing a second pressure strip at one end close to each other of the remaining two adjacent battery cell groups, it can be achieved that a first pressure strip 1 or a second pressure strip is provided between any two adjacent battery cell groups, so that the battery cells 201 of any two adjacent battery cell groups can be fixed, thereby further reducing the relative movement of the two adjacent battery cell groups in the second direction and improving the reliability of the connection of the battery cell assembly 20.

[0143] In some embodiments, refer to the attached Figure 11 As shown, the pole 202 of the battery cell 201 and the explosion-proof valve are respectively located on opposite sides of the battery cell 201 along the second direction, and the first pressure strip 1 is provided on the side of the battery cell 201 having the pole 202 and is spaced apart from the pole 202 .

[0144] It is understandable that in the related art, the pole and the explosion-proof valve of the battery cell are often arranged on the same side of the battery cell. Once extreme conditions such as thermal runaway occur, accidents such as combustion, explosion, and release of toxic gases will occur, affecting personal safety, causing economic losses, ecological pollution and waste of resources. However, the pole 202 and the explosion-proof valve of the battery cell 201 of the utility model are respectively located on opposite sides of the battery cell 201 along the second direction. In extreme conditions such as thermal runaway, high-temperature and high-pressure airflow and toxic gases can be quickly released along the bottom exhaust channel to achieve thermoelectric separation, which can reduce the impact of thermal runaway, alleviate the hazards caused by thermal runaway, and greatly improve the safety performance of the battery device 100.

[0145] Furthermore, the first bead 1 is positioned on the side of the battery cell 201 with the terminal 202. This, on the one hand, can compress the battery cell 201, reducing relative movement between two adjacent battery cell groups in the second direction and improving the reliability of the connection of the battery cell assembly 20. Furthermore, the first bead 1 and the explosion-proof valve can be positioned on different sides of the battery cell 201, reducing the likelihood of the first bead 1 and the explosion-proof valve being opposed to each other and reducing the impact of the first bead 1 on the discharge of high-temperature, high-pressure gas from the explosion-proof valve, further improving the safety of the battery device 100. Furthermore, the first bead 1 is spaced apart from the terminal 202, which can reduce interference between the first bead 1 and the terminal 202 and facilitate assembly of the battery device 100.

[0146] In a specific example, the crimping portion 11 of the first pressure strip 1 simultaneously presses the shoulders of multiple battery cells 201 of two adjacent battery cell groups, and in the third direction, the crimping portion 11 is spaced apart from the pole 202. The first pressure strip 1 has two supporting portions 12, which are connected to one end of the crimping portion 11 along the second direction toward the electrical connection row 2, and the two supporting portions 12 are respectively located at the two ends of the crimping portion 11 along the third direction, and the ends of the two supporting portions 12 facing away from each other are spaced apart from the pole 202.

[0147] In the above technical solution, by locating the pole 202 of the battery cell 201 and the explosion-proof valve on opposite sides of the battery cell 201 along the second direction, in extreme situations such as thermal runaway, high-temperature, high-pressure airflow and toxic gases can be quickly released along the bottom exhaust channel, achieving thermal and electrical separation, reducing the impact of thermal runaway, alleviating the hazards caused by thermal runaway, and greatly improving the safety performance of the battery device 100.

[0148] In some embodiments, refer to the attached Figure 10 and attached Figure 11As shown, a connecting piece 203 is provided on one side of the battery cell 201 having the pole 202, which is used to electrically connect two adjacent battery cells 201 located in the same battery cell group. The battery device 100 also includes an insulating member 30, which is provided on the side of the connecting piece 203 away from the battery cell 201 and extends along the first direction.

[0149] It can be understood that, first, the design of the insulating part 30 can effectively isolate the connecting piece 203 from the adjacent conductors, reducing the risk of arc discharge or short circuit under high-voltage electric fields; second, the insulating part 30 can buffer the impact of metal debris, welding spatter and other debris on the connecting piece 203, reducing the possibility of local current concentration caused by scratches or dents; third, the insulating part 30 can reduce water vapor penetration and reduce the electrochemical corrosion of the connecting piece 203 in a humid environment; fourth, the insulating part 30 can have a heat-insulating effect and reduce the spread of fire in the event of thermal runaway.

[0150] In a specific example, Figure 10 and attached Figure 11 As shown, the battery cell assembly 20 includes six battery cell groups arranged along the third direction, each battery cell group includes thirty-two battery cells 201 arranged along the first direction, each battery cell 201 has a positive electrode column 202 and a negative electrode column 202, each electrode column 202 is connected to a connecting piece 203, and each battery cell group is provided with two insulating members 30 on one side of the connecting piece 203, and the two insulating members 30 located on the same battery cell group are spaced apart along the third direction.

[0151] It should be noted that the connecting piece 203 is an aluminum bar, and the insulating part 30 is bonded to the aluminum bar. The bonding method can fill micro-defects on the surface of the aluminum bar (such as pores in the oxide layer and processing scratches), absorb the shear stress generated by the thermal expansion of the aluminum bar, reduce the possibility of local breakdown of the insulating part 30, improve the integrity and reliability of the insulating part 30, and extend the service life of the battery device 100. In addition, compared with the fastener connection, the adhesive connection can reduce the use of mechanical fasteners, reduce the weight of the battery device 100 to a certain extent, and is conducive to the lightweighting of the battery device 100.

[0152] In the above technical solution, by providing an insulating member 30 on the side of the connecting piece 203 facing away from the battery cell 201, the insulating member 30 can play the role of physical isolation and functional enhancement, thereby improving the reliability and safety of the connecting piece 203, extending the service life of the connecting piece 203, and improving the safety performance of the battery device 100.

[0153] In some embodiments, the insulating member 30 is mica paper or an insulating film.

[0154] It is understandable that when the insulating member 30 is mica paper, mica paper has excellent high temperature resistance and chemical stability, which can improve the stability and reliability of the insulating member 30. In addition, mica paper has good electrical insulation performance, high breakdown voltage, and stable dielectric constant, which can reduce the risk of arc discharge or short circuit and improve the safety performance of the battery device 100.

[0155] When the insulating member 30 is an insulating film, the manufacturing cost is low, which can relatively reduce the production cost of the battery device 100. The insulating film has good flexibility and ductility, can adapt to the complex shape of the connecting piece 203 surface, and facilitates the processing and installation of the insulating member 30. It can also absorb some vibration stress, reduce friction loss between the connecting piece 203 and the fixing part, and extend the service life of the connecting piece 203. At the same time, the insulating film has high dielectric strength and high volume resistivity, which can reduce the safety risks of leakage and breakdown, and improve the safety performance of the battery device 100.

[0156] In the related art, since the pole and explosion-proof valve of the battery cell are located on the same side of the battery cell, considering the thermal runaway design requirements, it is often necessary to stick insulating materials such as TC composite tape (ceramic composite tape) on the aluminum bar, which is costly, occupies a large Z-direction space, and reduces the grouping efficiency of the battery device. However, the pole 202 and explosion-proof valve of the battery cell 201 of the utility model are respectively located on opposite sides of the battery cell 201 along the second direction. In extreme cases such as thermal runaway, high-temperature and high-pressure airflow and toxic gases can be quickly released along the bottom exhaust channel. The safety performance of the battery device 100 is relatively higher, so the protection scheme of the connecting piece 203 can be reduced to a certain extent. Therefore, by making the insulating member 30 mica paper or insulating film, the cost of the insulating member 30 can be reduced, the space occupied by the insulating member 30 in the second direction can be reduced, and the grouping efficiency of the battery device 100 can be improved.

[0157] Of course, the present invention is not limited to this. The insulating member 30 can also be other low-temperature buffer materials besides mica paper and insulating film, which can reduce the production cost of the insulating member 30 and expand the application scenarios of low-temperature materials.

[0158] In the above technical solution, by making the insulating member 30 mica paper or insulating film, the protection scheme for the connecting piece 203 can be reduced, the cost of the insulating member 30 can be reduced, the space occupied by the insulating member 30 in the second direction can be reduced, and the grouping efficiency of the battery device 100 can be improved.

[0159] Secondly, refer to Figure 12 The present invention provides an electrical device 1000 , comprising: a battery device 100 according to an embodiment of the first aspect of the present invention.

[0160] The power-consuming device 1000 may be a vehicle, and the battery device 100 may be installed at the bottom of the vehicle body 200 .

[0161] In the above technical solution, the above-mentioned battery device 100 is provided, and the connecting component 10 includes a first pressure strip 1 and an electrical connection bar 2. The first pressure strip 1 and the electrical connection bar 2 both extend along the first direction. The first pressure strip 1 is crimped on the side of the battery cell assembly 20 along the second direction, and the electrical connection bar 2 is directly connected to the side of the first pressure strip 1 away from the battery cell assembly 20. Compared with the existing technology, the production and processing cost of the foam 23 can be saved, and the steps of cutting and pre-pressing the foam 23 are eliminated, the assembly process of the connecting component 10 is simplified, and the assembly efficiency of the connecting component 10 is improved. It can also reduce the space occupied by the connecting component 10 in the second direction, increase the distance between the connecting component 10 and the box of the battery device 100 in the second direction, improve the reliability of the connecting component 10, and extend the service life of the connecting component 10, which is beneficial to the spatial design of the battery device 100 in the second direction and improves the grouping efficiency of the battery device 100.

[0162] Refer to the following Figures 1-11 A battery device 100 according to some embodiments of the present invention is described.

[0163] Reference Figures 1-11 In this embodiment, the battery device 100 includes a box body, a battery cell assembly 20 , a connection assembly 10 , a second pressure bar and an insulating member 30 .

[0164] Specifically, the battery cell assembly 20 is arranged in the box, and the battery cell assembly 20 includes six battery cell groups arranged along the third direction, each battery cell group includes thirty-two battery cells 201 arranged along the first direction, and the pole 202 and the explosion-proof valve of the battery cell 201 are respectively located on the opposite sides of the battery cell 201 along the second direction. A connecting assembly 10 is provided on a pair of adjacent battery cell groups among the six battery cell groups, and a second pressure strip is provided on the end close to each other of the remaining four pairs of adjacent battery cell groups. The connecting assembly 10 and the second pressure strip are both provided on one side of the battery cell assembly 20 along the second direction and extend along the first direction, so that the battery cells 201 of any two adjacent battery cell groups can be fixed, reducing the relative movement of the two adjacent battery cell groups in the second direction, and improving the reliability of the connection of the battery cell assembly 20.

[0165] Furthermore, a connecting piece 203 is provided on one side of the battery cell 201 having the terminal 202, which is used to electrically connect two adjacent battery cells 201 located in the same battery cell group. An insulating member 30 is provided on the side of the connecting piece 203 facing away from the battery cell 201 and extends along the first direction. The insulating member 30 is mica paper or an insulating film, which can achieve the effects of physical isolation and functional enhancement, thereby improving the reliability and safety of the connecting piece 203, extending the service life of the connecting piece 203, and improving the safety performance of the battery device 100.

[0166] Furthermore, the connection assembly 10 includes a first pressure strip 1 and two electrical connection bars 2. The first pressure strip 1 is provided on one side of the battery cell 201 having the pole 202 and is spaced apart from the pole 202. The first pressure strip 1 extends along a first direction and includes a crimping portion 11 and two supporting portions 12. The crimping portion 11 is used to press the battery cells 201 of two adjacent battery cell groups. The two supporting portions 12 are respectively provided at both ends of the crimping portion 11 along a third direction, and the supporting portion 12 is connected to one end of the crimping portion 11 away from the battery cell assembly 20 along the second direction. One end of the supporting portion 12 in the width direction is connected to the crimping portion 11, and the other end extends along the third direction toward a direction away from the crimping portion 11. The two electrical connection bars 2 are respectively fixed to the sides of the two supporting parts 12 away from the battery cell assembly 20, and the electrical connection bar 2 is bonded to the supporting parts 12 and / or connected by fasteners, which can save the production and processing cost of the foam 23, eliminate the steps of cutting and pre-pressing the foam 23, simplify the assembly process of the connection component 10, improve the assembly efficiency of the connection component 10, and reduce the space occupied by the connection component 10 in the second direction, increase the distance between the connection component 10 and the box of the battery device 100 in the second direction, improve the reliability of the connection component 10, extend the service life of the connection component 10, facilitate the spatial design of the battery device 100 in the second direction, and improve the grouping efficiency of the battery device 100.

[0167] Furthermore, along the third direction, the ends of the two supporting parts 12 facing away from each other have a flange 121, and along the second direction, the flange 121 extends toward the side facing away from the crimping part 11, which can improve the wrapping effect of the supporting part 12 on the electrical connection row 2, reduce the possibility of the electrical connection row 2 shaking along the third direction after assembly is completed, and further improve the connection reliability of the connection component 10.

[0168] Furthermore, the crimping portion 11 includes a first plate 111, a second plate 112 and a third plate 113 connected in sequence, the first plate 111, the second plate 112 and the third plate 113 all extend along the first direction, and in a cross section perpendicular to the first direction, the second plate 112 extends along the third direction, for crimping on one side of the battery cell assembly 20 along the second direction, the first plate 111 and the third plate 113 are respectively connected to the two ends of the second plate 112 along the third direction, and the first plate 111 and the third plate 113 both extend in a direction away from the battery cell assembly 20, and the supporting portion 12 is connected to the end of the first plate 111 and / or the third plate 113 away from each other, which can reduce the weight of the crimping portion 11 while pressing the battery cell assembly 20, thereby reducing the overall weight of the first pressure strip 1, which is conducive to the lightweighting of the connection assembly 10, can save the materials required for the production of the first pressure strip 1, and reduce the production and processing cost of the first pressure strip 1.

[0169] Furthermore, the electrical connector bar 2 is used to electrically connect the battery cell assembly 20 and the connector. The electrical connector bar 2 includes a conductive member 21, a wear-resistant layer, and an insulating layer. The conductive member 21, the wear-resistant layer, and the insulating layer all extend along a first direction. The conductive member 21 is copper or aluminum. The wear-resistant layer covers at least a portion of the conductive member 21, and the insulating layer directly covers at least a portion of the wear-resistant layer. The wear-resistant layer protects the conductive member 21, reducing the risk of wear of the conductive member 21 and thereby increasing the service life of the electrical connector bar 2. The insulating layer also provides insulation, reducing the risk of short circuits caused by high-voltage arcs generated by thermal breakdown of the conductive member 21, thereby improving the risk of thermal runaway explosions within the battery device 100 and enhancing the safety of the battery device 100. Furthermore, by directly covering at least a portion of the wear-resistant layer with the insulating layer, the cost of the electrical connector bar 2 can be reduced, the space occupied by the electrical connector bar 2 in the second direction can be reduced, and the battery device 100 assembly efficiency can be improved.

[0170] Furthermore, a foam 23 is provided on the side of the electrical connection bar 2 facing away from the first pressure strip 1. On the one hand, the setting of the foam 23 can absorb vibrations, play a buffering role for the electrical connection bar 2, achieve fixed protection for the electrical connection bar 2, reduce the possibility of cracks in the electrical connection bar 2 due to stress concentration, and extend the service life of the connection component 10. On the other hand, the side of the electrical connection bar 2 facing away from the first pressure strip 1 can be isolated from other components to reduce the risk of short circuit.

[0171] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0172] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that: include: Box; A battery cell assembly (20), wherein the battery cell assembly (20) is disposed in the box; A connecting assembly (10), wherein the connecting assembly (10) is arranged in the box and comprises a first pressure strip (1) and an electrical connection bar (2), wherein the first pressure strip (1) extends along a first direction, the first pressure strip (1) is crimped onto a side of the battery cell assembly (20) along a second direction, the electrical connection bar (2) is arranged on a side of the first pressure strip (1) away from the battery cell assembly (20) and extends along the first direction, the electrical connection bar (2) is directly connected to the first pressure strip (1), and the first direction and the second direction are perpendicular to each other.

2. The battery device according to claim 1, wherein: The first layering strip (1) comprises: A pressing portion (11), the pressing portion (11) having a pressing surface, the pressing surface being pressed against one side of the battery cell assembly (20) along the second direction; A supporting portion (12), the supporting portion (12) is located on a side of the crimping portion (11) facing away from the battery cell assembly (20), the supporting portion (12) has a supporting surface, the electrical connection bar (2) is fixed on the supporting surface, and the supporting surface is not coplanar with the crimping surface.

3. The battery device according to claim 1, wherein: The first layering strip (1) comprises: a crimping portion (11); A supporting portion (12), wherein the supporting portion (12) is provided at at least one end of the crimping portion (11) along the third direction, the supporting portion (12) is connected to one end of the crimping portion (11) along the second direction facing the electrical connection row (2), one end of the supporting portion (12) in the width direction is connected to the crimping portion (11), and the other end extends along the third direction in a direction away from the crimping portion (11), and the electrical connection row (2) is fixed to the side of the supporting portion (12) along the second direction away from the crimping portion (11), and the third direction is perpendicular to the first direction and the second direction.

4. The battery device according to claim 3, characterized in that The supporting parts (12) are provided at both ends of the crimping part (11) along the third direction. There are two electrical connection rows (2), and the two electrical connection rows (2) are respectively provided on the two supporting parts (12).

5. The battery device according to claim 3, wherein: Along the third direction, the end of the supporting portion (12) facing away from the crimping portion (11) has a flange (121), and along the second direction, the flange (121) extends toward the side facing away from the crimping portion (11).

6. The battery device according to claim 3, characterized in that The crimping portion (11) includes a first plate (111), a second plate (112) and a third plate (113) connected in sequence, the first plate (111), the second plate (112) and the third plate (113) all extending along the first direction, and in a cross section perpendicular to the first direction, the second plate (112) extending along the third direction for crimping on one side of the battery cell assembly (20) along the second direction, the first plate (111) and the third plate (113) being respectively connected to both ends of the second plate (112) along the third direction, and the first plate (111) and the third plate (113) both extending in a direction away from the battery cell assembly (20), and the supporting portion (12) being connected to one end of the first plate (111) and / or the third plate (113) away from each other.

7. The battery device according to claim 1, wherein: The electrical connection row (2) and the first pressure strip (1) are bonded and / or connected via fasteners.

8. The battery device according to claim 1, wherein: The electrical connection bar (2) is used to electrically connect any two of the battery cell assembly (20), the connector, and the electronic control assembly.

9. The battery device according to claim 1, wherein: The electrical connection bar (2) comprises: a conductive member (21), the conductive member (21) extending along the first direction; A wear-resistant layer, along the first direction, the wear-resistant layer covering at least a portion of the conductive member (21); The insulating layer directly covers at least a portion of the wear-resistant layer along the first direction.

10. The battery device according to claim 9, characterized in that The conductive member (21) is a copper member or an aluminum member.

11. The battery device according to claim 1, wherein: A side of the electrical connection row (2) facing away from the first pressure strip (1) is provided with foam (23).

12. The battery device according to claim 1, wherein: The battery cell assembly (20) comprises a plurality of battery cell groups arranged along a third direction, each of the battery cell groups comprises a plurality of battery cells (201) arranged along the first direction, at least two adjacent battery cell groups are provided with the connecting assembly (10) at one end close to each other, and the first pressure strip (1) is simultaneously pressed onto the two adjacent battery cell groups along the third direction, and the third direction is perpendicular to the first direction and the second direction.

13. The battery device according to claim 12, characterized in that The battery device (100) further includes: A second pressure strip extends along the first direction, and the ends of two adjacent battery cell groups close to each other are provided with the connection assembly (10), and the ends of the remaining two adjacent battery cell groups close to each other are provided with the second pressure strip.

14. The battery device according to claim 12, wherein: The pole (202) of the battery cell (201) and the explosion-proof valve are respectively located on opposite sides of the battery cell (201) along the second direction, and the first pressure strip (1) is provided on a side of the battery cell (201) having the pole (202) and is spaced apart from the pole (202).

15. The battery device according to claim 14, characterized in that A connecting piece (203) is provided on one side of the battery cell (201) having the pole (202) for electrically connecting two adjacent battery cells (201) located in the same battery cell group. The battery device (100) further comprises: An insulating member (30), the insulating member (30) being provided on a side of the connecting piece (203) facing away from the battery cell (201) and extending along the first direction.

16. The battery device according to claim 15, characterized in that The insulating member (30) is mica paper or an insulating film.

17. An electrical device, characterized in that: A battery device (100) comprising any one of claims 1-16.

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