Battery device and electric device

Abstract

The embodiment of the utility model discloses a battery device and a power utilization device. The battery device comprises a box body which comprises a first box body wall; the plurality of single batteries are accommodated in the box body, a first shell wall of each single battery is provided with an electrode terminal, and the first shell wall faces the first box body wall; the plurality of confluence components are used for electrically connecting a plurality of battery monomers, the plurality of confluence components comprise a first confluence component, the first confluence component comprises a connecting part and a fusing part, the connecting part is used for electrically connecting electrode terminals of the plurality of battery monomers, and at least part of the surface of the first confluence component is arranged opposite to the first box body wall; and the insulating part is at least partially located between the first confluence component and the first box body wall and at least covers the surface, facing the first box body wall, of the fusing part. According to the battery device and the power utilization device provided by the embodiment of the invention, the stability and reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically, to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of this sustainable development. Battery technology is a crucial factor in the development of electric vehicles. Amidst the rapid advancements in battery technology, improving the safety performance of battery devices is a pressing technical challenge. Utility Model Content

[0003] The embodiments of the present application provide a battery device and an electrical device, which can improve the stability and reliability of the battery device.

[0004] In a first aspect, a battery device is provided, comprising: a box body, the box body including a first box body wall; a plurality of battery cells, the plurality of battery cells being accommodated in the box body, the first shell wall of the battery cells being provided with electrode terminals, the first shell wall facing the first box body wall; a plurality of busbar components for electrically connecting the plurality of battery cells, the plurality of busbar components including a first busbar component, the first busbar component including a connecting portion and a fuse portion, the connecting portion being used to electrically connect the electrode terminals of the plurality of battery cells, at least a portion of the surface of the first busbar component being arranged opposite to the first box body wall; an insulating member, the insulating member being at least partially located between the first busbar component and the first box body wall, and at least covering the surface of the fuse portion facing the first box body wall.

[0005] Therefore, the battery device of the embodiment of the present application is provided with an insulating part. When the fuse part blows, the insulating part can be used to block the melt generated when the fuse part blows, reduce the melt splashing to the first box wall, reduce the risk of the first box wall being pierced, and also reduce the generation of secondary short circuit loops in the battery device, thereby improving the stability and reliability of the battery device.

[0006] In some embodiments, the insulating member includes a first portion and a second portion connected thereto. The first portion covers at least a portion of the surface of the connecting portion facing the first housing wall, and the second portion covers the surface of the fuse portion facing the first housing wall. The first portion has different dimensions from the second portion and / or is made of a different material than the second portion. Considering that the fuse portion will generate a high-temperature melt at its melting point, by setting the first and second portions to different dimensions and / or materials, the second portion can better block melt splashing, thereby improving the reliability of the battery device.

[0007] In some embodiments, the thickness of the first portion is less than the thickness of the second portion, and / or the melting point of the material of the first portion is less than the melting point of the material of the second portion. By increasing the thickness of the second portion, the structural strength of the second portion can be improved; by increasing the melting point of the second portion, the temperature resistance of the second portion can be improved. Then, in the event that the fuse part melts, the second portion with a thicker thickness or a higher melting point can effectively prevent the melt from splashing, protecting the first box wall, reducing the risk of the first box wall being penetrated by the melt, and improving the reliability of the battery device.

[0008] In some embodiments, the thickness T2 of the second portion and the melting point P2 of the material of the second portion satisfy one of the following conditions: P2 ≤ 300°C and T2 ≥ 0.1 mm; or, 300°C ≤ P2 ≤ 500°C and T2 ≥ 0.07 mm; or, P2 ≥ 500°C and T2 ≥ 0.5 mm. For the second portion, the lower the temperature resistance of the material, the thicker it needs to be to resist the impact of the high-temperature melt and thus meet the design requirements. Conversely, if the material of the second portion has a higher temperature resistance, the thickness can be reduced to reduce the weight and volume of the second portion, thereby increasing the energy density of the battery device.

[0009] In some embodiments, along the width direction of the first conduit component, the size of the second part is larger than the size of the first part to increase the surface area of ​​the second part used to cover the fuse part, so that the second part can more effectively block the splash of the melt generated by the fuse part to protect the first box wall.

[0010] In some embodiments, the battery device further includes: a fixing member, which is used to limit the first shell wall and is located on the side of the first shell wall facing the first box wall. The insulating member also includes a third part, which is at least partially located between the first collector and the fixing member and at least covers the surface of the fuse part facing the fixing member. The fixing member is attached to the side of the first shell wall facing the first box wall and can be used to compress and fix the battery cell to improve the stability of the battery cell in the box. A third part of the insulating member is provided between the fixing member and the fuse part of the first collector. In the event that the fuse part melts, the third part covering its surface can be used to block the melt generated when the fuse part melts, reduce the melt splashing to the fixing member, reduce the risk of the fixing member being damaged, and also reduce the generation of secondary short circuits in the battery device, thereby improving the stability and reliability of the battery device.

[0011] In some embodiments, the third portion includes a first region and a second region that are relatively bent, the first region being located between the first housing wall and the fixing member, and the second region being located between the fuse unit and the fixing member. The second region can be used to prevent melt generated by the fuse unit from damaging the fixing member; while the first region can be used to secure the insulating member to the first housing wall, thereby improving the stability of the insulating member and enhancing the insulation reliability between the first housing wall and the fixing member.

[0012] In some embodiments, the third portion is connected to the second portion, or the third portion and the second portion are an integral structure, so as to simplify the structure of the insulating member.

[0013] In some embodiments, the third portion further includes a third region bent relative to the second region, the third region being located between the first confluence component and the first box wall, and the third region being stacked with the second portion along the thickness direction of the second portion. The third region can be stacked with the second portion and relatively fixed to achieve relative fixation between the third portion and the second portion, and the third region can also be used to prevent splashing of melt generated by the fuse.

[0014] In some embodiments, along the width direction of the first convergence component, the size of the portion of the third region covering the first convergence component is greater than or equal to 5 mm, so as to increase the size of the overlapping area between the second part and the third region. In the event that the fuse part blows, the risk of the melt crossing the intersection area between the second part and the third region can be reduced, thereby reducing the risk of the melt penetrating the first box wall and improving the reliability of the battery device.

[0015] In some embodiments, the third region includes a main region and an extension region connected to the main region. The extension region covers at least a portion of the surface of the fuse facing the first housing wall. Along the width of the first conduit component, the extension region is larger than the main region. By providing the extension region, the third region can cover a larger area of ​​the fuse, and the extension region can better prevent the melt generated by the fuse from splashing.

[0016] In some embodiments, the third region is located between the second portion and the first current collecting component, so that the third region is clamped and fixed by the second portion and the first current collecting component, thereby improving the reliability and stability of the insulating member.

[0017] In some embodiments, the third region is connected to the second portion, or the third region and the second portion are an integral structure, so as to simplify the structure of the insulating member and facilitate processing and assembly.

[0018] In some embodiments, the second portion is made of polyimide and / or ceramic silicone rubber; and / or the third portion is made of polyimide and / or ceramic silicone rubber. Both polyimide and ceramic silicone rubber can meet design requirements such as temperature resistance and are easy to process.

[0019] In some embodiments, a plurality of battery cells are arranged in a row along a first direction, and the battery device includes at least two rows of battery cells arranged along a second direction. The fixing member extends along the first direction and connects to the housing. The fixing member limits the first shell wall of the row of battery cells, or the fixing member is located adjacent to two adjacent rows of battery cells and limits the first shell walls of the two rows of battery cells. By providing a single fixing member that is attached to the first shell walls of multiple battery cells, the multiple battery cells are simultaneously fixed, reducing the number of fixing members and facilitating installation.

[0020] In some embodiments, a beam is disposed within the housing, the beam being positioned between the second walls of two rows of battery cells arranged along the second direction, the first housing wall intersecting the second wall. The fixing member is positioned on the side of the beam facing the first housing wall and is integrally formed with the beam, limiting the first housing wall of the two rows of battery cells. The beam within the housing can be used to divide the interior of the housing into multiple subspaces, each for accommodating a battery cell, thereby improving the stability of the battery cells within the housing. Integrating the fixing member with the beam can simplify the structure and facilitate installation.

[0021] In some embodiments, the distance between the surface of the first conduit component facing the fixing member and the fixing member is less than or equal to 30 mm; and / or, the fixing member is at least partially made of metal. Reducing the distance D between the first conduit component and the fixing member also reduces the distance between the fuse part and the fixing member, thereby increasing the contact area between the fixing member and the first shell wall and improving the fixing effect of the fixing member on the battery cell; in addition, it can also increase the space utilization rate within the battery device case and improve the energy density of the battery device. However, when the distance D between the first conduit component and the fixing member is reduced, if at least part of the fixing member is made of metal, the risk of the melting point of the fuse part impacting the fixing member will increase. Therefore, by providing an insulating member to cover the fuse part, it is possible to effectively prevent the melt from splashing, reduce the risk of the fixing member being impacted and causing a short circuit, and improve the reliability of the battery device.

[0022] In some embodiments, the distance between the surface of the fuse facing the first housing wall and the first housing wall is less than or equal to 30 mm. Reducing the distance between the fuse and the first housing wall, i.e., reducing the distance between the first current collecting component and the first housing wall, can increase space utilization within the battery device housing and improve the energy density of the battery device.

[0023] In some embodiments, the first busbar assembly includes a plurality of such connecting portions, including a first connecting portion and a second connecting portion. The first connecting portion is configured to electrically connect to a first electrode terminal of a first battery cell, and the second connecting portion is configured to electrically connect to a second electrode terminal of a second battery cell. The fuse portion is located between the first and second connecting portions. The first busbar assembly can electrically connect at least two adjacent battery cells. If the fuse portion located between the two connecting portions melts, the electrical connection between the two adjacent battery cells can be severed. This structure is simple and easy to implement.

[0024] In some embodiments, the battery device includes a plurality of current collecting components arranged along a first direction, the insulating member extends along the first direction and covers surfaces of the plurality of current collecting components facing the first housing wall, the plurality of current collecting components include at least one first current collecting component, and the insulating member covers the fuse portion of at least one first current collecting component. The insulating member can cover the plurality of current collecting components arranged along the first direction, thereby reducing the number of insulating members and facilitating assembly of the battery device.

[0025] In some embodiments, the first shell wall is provided with a pressure relief mechanism. When the pressure relief mechanism is actuated, the fuse located near the pressure relief mechanism can be promptly blown to disconnect the high-voltage connection, thereby reducing the risk of short circuit between battery cells and improving the reliability of the battery device.

[0026] In a second aspect, an electrical device is provided, comprising: the battery device described in the first aspect or any one embodiment of the first aspect, wherein the battery device is used to store or provide electrical energy.

[0027] In some embodiments, the electrical device is a vehicle, a ship, or a spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a vehicle according to an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the exploded structure of a battery device according to one embodiment of the present application;

[0030] Figure 3 This is a schematic diagram of a partial structure of an insulating member according to an embodiment of the present application;

[0031] Figure 4 This is a schematic structural diagram of a first confluence component according to an embodiment of the present application;

[0032] Figure 5 This is a schematic cross-sectional view of a battery device according to one embodiment of the present application;

[0033] Figure 6This is an enlarged schematic diagram of a partial cross-sectional structure of a battery device according to one embodiment of the present application;

[0034] Figure 7 This is a schematic diagram of the exploded structure of a battery device according to another embodiment of the present application;

[0035] Figure 8 This is an enlarged schematic diagram of a partially exploded structure of a battery device according to another embodiment of the present application;

[0036] Figure 9 A schematic top view of a partial structure of a battery device according to another embodiment of the present application;

[0037] Figure 10 This is an enlarged schematic top view of a partial structure of a battery device according to another embodiment of the present application;

[0038] Figure 11 This is a schematic cross-sectional view of a battery device according to another embodiment of the present application;

[0039] Figure 12 This is an enlarged schematic diagram of a partial cross-sectional structure of a battery device according to another embodiment of the present application;

[0040] Figure 13 This is a schematic cross-sectional view of a battery device according to another embodiment of the present application;

[0041] Figure 14 This is an enlarged schematic diagram of a partial cross-sectional structure of a battery device according to another embodiment of the present application;

[0042] Figure 15 This is an enlarged schematic diagram of a partial cross-sectional structure of a battery device according to another embodiment of the present application;

[0043] Figure 16 This is a schematic diagram of the exploded structure of a battery device according to another embodiment of the present application;

[0044] Figure 17 This is an enlarged schematic diagram of a partially exploded structure of a battery device according to another embodiment of the present application;

[0045] Figure 18 This is an enlarged schematic diagram of a partially exploded structure of a battery device according to another embodiment of the present application;

[0046] Figure 19 A schematic top view of a partial structure of a battery device according to another embodiment of the present application;

[0047] Figure 20 This is an enlarged top view of a partial structure of a battery device according to another embodiment of the present application.

[0048] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0050] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0052] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0053] In the description of this application, 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 connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] The term "and / or" in this application simply describes an association 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. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0055] In the embodiments of this application, 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 this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0056] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0057] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0058] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0059] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0060] The battery cells can 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., which are not limited in the embodiments of the present application.

[0061] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0062] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0063] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0064] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0065] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0066] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0067] As an example, 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 house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0068] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0069] In some embodiments, 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 cross beam and longitudinal beam of the vehicle.

[0070] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0071] Multiple battery cells within a battery device are typically connected in series, parallel, or in mixed series via a busbar. At least one busbar within the battery device is equipped with a fuse to promptly disconnect the high-voltage connection between battery cells in the event of a short circuit or thermal runaway failure within the battery device. However, when the fuse blows, the high-temperature melt generated at the moment of melting can easily impact components near the fuse. For example, the melt may impact the nearby casing wall, causing it to penetrate the casing wall and potentially leading to a secondary short circuit, compromising the safety of the battery device.

[0072] Therefore, embodiments of the present application provide a battery device and an electrical device that can solve the above-mentioned problems. The battery device of the embodiment of the present application includes a housing, a plurality of battery cells, a plurality of busbars, and an insulating member. The housing is used to accommodate the plurality of battery cells, and the housing includes a first housing wall; the first housing wall of the battery cells is provided with electrode terminals, and the first housing wall faces the first housing wall; the plurality of busbars are used to electrically connect the plurality of battery cells, and the plurality of busbars include a first busbar, the first busbar includes a connecting portion and a fuse portion, the connecting portion is used to connect the electrode terminals of the plurality of battery cells to achieve electrical connection between the plurality of battery cells, and at least a portion of the surface of the first busbar is disposed opposite the first housing wall; the insulating member is at least partially located between the first busbar and the first housing wall, and at least covers the surface of the fuse portion facing the first housing wall. In this way, when the fuse portion blows, the insulating member can be used to block the melt generated when the fuse portion blows, reduce the melt splashing onto the first housing wall, reduce the risk of the first housing wall being penetrated, and also reduce the generation of secondary short circuits in the battery device, thereby improving the stability and reliability of the battery device.

[0073] The technical solutions described in the embodiments of this application are applicable to various electrical devices using battery devices. For the convenience of explanation, the following embodiments are described using a vehicle as an electrical device.

[0074] For example, Figure 1 As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery device 10 can be provided inside the vehicle 1. The controller 30 is used to control the battery device 10 to power the motor 40. For example, a battery device 10 can be provided at the bottom, front or rear of the vehicle 1. The battery device 10 can be used to power the vehicle 1. For example, the battery device 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery device 10 can not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0075] Figure 2 Schematic diagram of the exploded structure of the battery device according to the embodiment of the present application is shown. Figure 2 As shown, the battery device 10 according to the embodiment of the present application includes: a box body 11 , a plurality of battery cells 20 , a plurality of busbar components 12 and an insulating member 13 . Figure 3 A partial structural diagram of the insulating member 13 of an embodiment of the present application is shown, for example, Figure 3 Shown Figure 2The insulating member 13 in the area A shown; Figure 4 FIG. 1 shows a structural diagram of a first confluence component 120 among multiple confluence components 12 in an embodiment of the present application. For example, Figure 4 The first conduit component 120 shown can be as follows Figure 2 Any one of the busbar components 12 shown.

[0076] In an embodiment of the present application, the box body 11 includes a first box wall 113; a plurality of battery cells 20 are accommodated in the box body 11, and the first shell wall 201 of the battery cell 20 is provided with an electrode terminal 202, and the first shell wall 201 faces the first box wall 113; a plurality of busbar components 12 are used to electrically connect the plurality of battery cells 20, and the plurality of busbar components 12 include a first busbar component 120, and the first busbar component 120 includes a connecting portion 121 and a fuse portion 122, and the connecting portion 121 is used to electrically connect the electrode terminals 202 of the plurality of battery cells 20; at least a portion of the surface of the first busbar component 120 is arranged opposite to the first box wall 113; the insulating member 13 is at least partially located between the first busbar component 120 and the first box wall 113, and at least covers the surface of the fuse portion 122 facing the first box wall 113.

[0077] The battery device 10 of the embodiment of the present application may include a plurality of battery cells 20 to meet different power requirements. The shape of the battery cell 20 of the embodiment of the present application can be set according to the actual application. For example, the battery cell 20 can be as follows Figure 2 The rectangular parallelepiped shown, or it can be different from Figure 2 The cylindrical or other shapes shown are not limited to these embodiments of the present application.

[0078] It should be understood that Figure 2 As shown, the battery device 10 of the embodiment of the present application may further include a box body 11, which may be used to accommodate a plurality of battery cells 20. The interior of the box body 11 of the embodiment of the present application is a hollow structure, and a plurality of battery cells 20 are accommodated in the box body 11. The box body 11 may include two parts, which are respectively referred to as a first box body part 111 and a second box body part 112, and the first box body part 111 and the second box body part 112 are buckled together. The shapes of the first box body part 111 and the second box body part 112 may be determined according to the shapes of the components accommodated therein. For example, they may be determined according to the shape of the combination of the plurality of battery cells 20 accommodated therein, and at least one of the first box body part 111 and the second box body part 112 may have an opening. For example, as Figure 2As shown, only one of the first and second housing portions 111, 112 may be a hollow rectangular parallelepiped with an opening, while the other may be a plate-shaped structure to cover the opening. For example, if the second housing portion 112 is a hollow rectangular parallelepiped with an opening, and the first housing portion 111 is a plate-shaped structure, the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 having a closed chamber, which can be used to accommodate multiple battery cells 20. Multiple battery cells 20 are connected in parallel, series, or in a mixed combination and placed within the housing 11 formed by the first and second housing portions 111, 112 being fastened together.

[0079] For example, unlike Figure 2 As shown, the first box body portion 111 and the second box body portion 112 can both be hollow rectangular parallelepipeds and each has an open surface. The opening of the first box body portion 111 and the opening of the second box body portion 112 are arranged opposite to each other, and the first box body portion 111 and the second box body portion 112 are interlocked to form a box body 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0080] The battery cell 20 of the embodiment of the present application may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, when the outer shell is a non-sealed structure, the outer shell plays a role in protecting the electrode assembly inside the battery cell, and a sealing bag is further included between the outer shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. When the outer shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0081] As an example, the battery cell 20 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, and a polygonal battery such as a hexagonal battery. There is no special limitation in this application.

[0082] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0083] For ease of explanation, the embodiments of the present application primarily use a rectangular battery device 10 as an example, and the battery device 10 includes a rectangular battery cell 20. The first shell wall 201 of the battery cell 20 is provided with an electrode terminal 202. The first shell wall 201 can be any wall of the battery cell 20. For example, the first shell wall 201 can be any wall of the housing or any wall of the end cap, but the embodiments of the present application are not limited thereto. The first shell wall 201 faces the first box wall 113 of the box body 11, that is, the first shell wall 201 is arranged opposite the first box wall 113.

[0084] In addition, for ease of description, the present embodiment defines three reference directions for the rectangular battery device 10. The length direction of the battery device 10 is direction X, the width direction of the battery device 10 is direction Y, and the height direction of the battery device 10 is direction Z. The length direction X, width direction Y, and height direction Z of the battery device 10 are perpendicular to each other, and the width direction Y of the battery device 10 is smaller than the length direction X.

[0085] It should be understood that the electrode terminal 202 of the embodiment of the present application is electrically connected to the electrode tab to output electrical energy. For example, the electrode terminal 202 can be directly connected to the electrode tab or indirectly connected to the electrode tab through a current collecting member.

[0086] The battery device 10 of the embodiment of the present application may include a plurality of busbar components 12, wherein the plurality of busbar components 12 include a first busbar component 120, and the first busbar component 120 may be any one of the plurality of busbar components 12. Figures 2 to 4 As shown, the multiple busbars 12 included in the battery device 10 may include one or more first busbars 120, that is, the multiple busbars 12 may include one or more first busbars 120 provided with a fuse 122; the multiple busbars 12 may also include one or more busbars 12 not provided with a fuse 122, but the embodiments of the present application are not limited thereto. For example, the drawings of the embodiments of the present application mainly take the example of a battery device 10 including two first busbars 120.

[0087] The first busbar component 120 of the present embodiment includes a connecting portion 121 and a fuse portion 122. The connecting portion 121 is used to electrically connect the electrode terminals 202 of at least two battery cells 20 to achieve electrical connection between the at least two battery cells 20. The fuse portion 122 is configured to melt when its temperature exceeds a threshold, thereby disconnecting the at least two battery cells 20 connected to the first busbar component 120. For example, if a battery cell 20 within the battery device 10 malfunctions, the temperature of the fuse portion 122 may rise. For example, if a battery cell 20 experiences thermal runaway or a short circuit occurs between multiple battery cells 20, the temperature of the fuse portion 122 may rise. If the temperature rises above the melting point of the fuse portion 122, the fuse portion 122 will melt, disconnecting the battery cells 20 connected to the first busbar component 120.

[0088] In the embodiment of the present application, at least a portion of the surface of the first current collector is disposed opposite the first housing wall 113. The insulating member 13 is located between the first current collector 120 and the first housing wall 113 and covers at least the surface of the fuse 122 that faces the first housing wall 113. Thus, if the fuse 122 blows, the insulating member 13 covering its surface can block the melt generated by the fuse 122, reducing the amount of melt splashing onto the first housing wall 113, lowering the risk of the first housing wall 113 being penetrated, and reducing the generation of secondary short circuits within the battery device 10, thereby improving the stability and reliability of the battery device 10.

[0089] It should be understood that the battery cell 20 in the embodiment of the present application may also be provided with other components. For example, the battery cell 20 is provided with a pressure relief mechanism 203 for discharging the internal gas of the battery cell 20 .

[0090] For example, when the internal pressure or temperature of a battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 203 is activated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 203 actuates or a weakened structure within the pressure relief mechanism 203 is destroyed, thereby creating an opening or channel for the internal pressure or temperature to be released. This threshold design varies depending on design requirements. The threshold may depend on the material of one or more of the positive electrode sheet, negative electrode sheet, electrolyte, and separator in the battery cell 20.

[0091] It should be understood that the pressure relief mechanism 203 of the embodiment of the present application can be provided on any wall of the housing. For example, if the pressure relief mechanism 203 is provided on the first housing wall 201, then when the pressure relief mechanism 203 is actuated, the fuse 122 located near the pressure relief mechanism 203 can be promptly melted to disconnect the high-voltage connection, thereby reducing the risk of short circuits between the battery cells 20 and improving the reliability of the battery device 10.

[0092] As an example, the pressure relief mechanism 203 may be integrally formed with the housing.

[0093] As an example, the pressure relief mechanism 203 may also be provided separately from and connected to the housing.

[0094] The "activation" mentioned in this application means that the pressure relief mechanism 203 produces an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell 20 can be released. The action produced by the pressure relief mechanism 203 may include but is not limited to: the components in the pressure relief mechanism 203 move to form an exhaust channel, at least a part of the pressure relief mechanism 203 ruptures, breaks, is torn or opened, etc. When the pressure relief mechanism 203 is actuated, the high-temperature and high-pressure substances inside the battery cell 20 will be discharged outward from the actuated part as exhaust. In this way, the battery cell 20 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0095] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism 203 can be configured as a through hole to discharge the gas inside the battery cell 20 .

[0096] The emissions from the battery cells 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, separator fragments, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

[0097] Figure 5 A partial cross-sectional schematic diagram of the battery device 10 in an embodiment of the present application is shown, for example, Figure 5 Can be as Figure 2 The cross-sectional view of the battery device 10 is shown, and the cross-section is perpendicular to the width direction of the battery device 10 . Figure 6 A partial cross-sectional schematic diagram of the battery device 10 in an embodiment of the present application is shown, for example, Figure 6 Shown Figure 5 Magnified view of area B in the middle.

[0098] In the embodiment of the present application, the specific structure of the first confluence component 120 can be set according to actual application. Figures 2 to 6As shown, the first busbar component 120 includes a plurality of connecting portions 121, including a first connecting portion 1211 and a second connecting portion 1212. The first connecting portion 1211 is used to electrically connect to the first electrode terminal 211 of the first battery cell 21, and the second connecting portion 1212 is used to electrically connect to the second electrode terminal 221 of the second battery cell 22. The fuse portion 122 is located between the first connecting portion 1211 and the second connecting portion 1212. The first busbar component 120 can achieve electrical connection between at least two adjacent battery cells 20. When the fuse portion 122 located between the two connecting portions 121 melts, the electrical connection between the two adjacent battery cells 20 can be disconnected. The structure is simple and easy to implement.

[0099] In some embodiments, depending on different connection requirements, the polarities of the first electrode terminal 211 of the first battery cell 21 and the second electrode terminal 221 of the second battery cell 22 connected by the first connecting portion 1211 and the second connecting portion 1212 of the first busbar 120 can be the same or opposite. For example, if the polarities of the first electrode terminal 211 and the second electrode terminal 221 are opposite, the first busbar 120 can be used to achieve a series connection between the first battery cell 21 and the second battery cell 22. For another example, if the polarities of the first electrode terminal 211 and the second electrode terminal 221 are the same, the first busbar 120 can be used to achieve a parallel connection between the first battery cell 21 and the second battery cell 22, but the embodiments of the present application are not limited to this.

[0100] In some embodiments, the first busbar 120 can be used to achieve electrical connection between at least two battery cells 20. For example, the first busbar 120 may include only two connecting portions 121, and the first busbar 120 is used to achieve electrical connection between two battery cells 20. For another example, the first busbar 120 may include four connecting portions 121, and the first busbar 120 is used to achieve electrical connection between four battery cells 20, but the embodiments of the present application are not limited thereto.

[0101] In some embodiments, the battery device 10 includes a plurality of busbars 12 arranged along a first direction, the insulating member 13 extends along the first direction and covers the surfaces of the plurality of busbars 12 facing the first box wall 113, the plurality of busbars includes at least one first busbar 120, and the insulating member 13 covers the fuse portion 122 of at least one first busbar 120. For example, Figures 2 to 6As shown, taking the first direction as the longitudinal direction X of the battery device 10 as an example, the insulating member 13 can cover the multiple busbars 12 arranged along the longitudinal direction X of the battery device 10, thereby reducing the number of insulating members 13 and facilitating the assembly of the battery device 10. In addition, the multiple busbars 12 arranged along the longitudinal direction X of the battery device 10 may include at least one first busbar 120, for example Figure 2 Taking one first busbar component 120 as an example, the embodiment of the present application is not limited thereto.

[0102] In some embodiments, the number of busbars 12 within the battery device 10 can be set based on the number of battery cells 20 or the connection method of the multiple battery cells 20. Among the multiple busbars 12 within the battery device 10, there can be at least one first busbar 120, each of which is provided with a fuse 122. The number of first busbars 120 provided with fuses 122 can be set based on actual application to balance the overcurrent performance of the first busbars 120 within the battery device 10 and the reliability of the battery device 10. The following description primarily uses any one first busbar 120 within the battery device 10 as an example.

[0103] In some embodiments, the distance D1 between the surface of the fuse 122 facing the first housing wall 113 and the first housing wall 113 is less than or equal to 30 mm. Reducing the distance D1 between the fuse 122 and the first housing wall 113, that is, reducing the distance between the first busbar 120 and the first housing wall 113, can increase the space utilization within the housing 11 of the battery device 10 and improve the energy density of the battery device 10. However, when the distance D1 between the fuse 122 and the first housing wall 113 is reduced, the risk of the fuse 122 melting and impacting the first housing wall 113 increases. Therefore, by providing an insulating member 13 to cover the fuse 122, it is possible to effectively prevent melt splashing, reduce the risk of impacting the first housing wall 113, and improve the reliability of the battery device 10.

[0104] The insulating member 13 according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0105] In the embodiments of the present application, the structure of the insulating member 13 can be customized based on practical application. For example, the insulating member 13 includes a first portion 131 and a second portion 132 connected to each other. The first portion 131 covers at least a portion of the surface of the connecting portion 121 facing the first housing wall 113, while the second portion 132 covers the surface of the fuse portion 122 facing the first housing wall 113. The dimensions of the first portion 131 and the second portion 132 are different, and / or the materials of the first portion 131 and the second portion 132 are different. The second portion 132 of the insulating member 13 covers the fuse portion 122, while the first portion 131 covers at least a portion of the first current-conducting component 120 excluding the fuse portion 122. Considering that the fuse portion 122 generates a high-temperature melt at its melting point, the different dimensions and / or materials of the first portion 131 and the second portion 132 help the second portion 132 better block melt splashing, thereby improving the reliability of the battery device 10.

[0106] In some embodiments, the material of the first portion 131 and the material of the second portion 132 may be the same, while the size of the first portion 131 and the size of the second portion 132 are different. In this way, the insulating member 13 may be an integral structure for ease of processing.

[0107] In some embodiments, the material of the first portion 131 and the material of the second portion 132 may also be different. By setting different materials, the performance of the insulating member 13 is improved and the insulation effect is enhanced.

[0108] In some embodiments, the thickness T1 of the first portion 131 is less than the thickness T2 of the second portion 132. By increasing the thickness of the second portion 132, the structural strength of the second portion 132 can be improved. Therefore, if the fuse 122 melts, the thicker second portion 132 can effectively prevent the melt from splashing, protecting the first box wall 113, reducing the risk of the first box wall 113 being penetrated by the melt, and improving the reliability of the battery device 10.

[0109] In some embodiments, the melting point P1 of the material of the first portion 131 is lower than the melting point P2 of the material of the second portion 132. For example, by setting the first portion 131 and the second portion 132 to different materials to achieve different melting points, when the fuse 122 melts, the second portion 132, which has better temperature resistance, is less likely to be damaged by the high-temperature melt, thereby preventing the melt from splashing.

[0110] In some embodiments, the thickness T2 of the second portion 132 and the melting point P2 of the material of the second portion 132 meet any one of the following three conditions: P2 ≤ 300°C and T2 ≥ 0.1 mm; or, 300°C ≤ P2 ≤ 500°C and T2 ≥ 0.07 mm; or, P2 ≥ 500°C and T2 ≥ 0.5 mm. For the second portion 132, the lower the temperature resistance of the material, the thicker it needs to be to resist the impact of the high-temperature melt and thus meet the design requirements. Conversely, if the material of the second portion 132 has a higher temperature resistance, the thickness T2 can be reduced to reduce the weight and volume of the second portion 132, thereby increasing the energy density of the battery device 10.

[0111] It should be understood that other dimensions of the first portion 131 and the second portion 132 may also be different. Figure 7 Another partial structural exploded diagram of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 7 The insulating member 13 of the battery device 10 shown can be Figure 2 The insulating element 13 of the battery arrangement 10 shown is different. Figure 8 A partial structural diagram of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 8 Can be Figure 7 Schematic diagram of the enlarged area C in the middle. Figure 9 A schematic top view of a partial structure of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 9 Shown as Figure 7 A top view of a partial structure of a battery device 10 is shown. Figure 10 Another partial structural diagram of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 10 Can be Figure 9 Schematic diagram of the enlarged area D in the middle.

[0112] like Figures 7 to 10 As shown, along the width direction of the first current collecting member 120, the dimension L2 of the second portion 132 is greater than the dimension L1 of the first portion 131. This increases the surface area of ​​the second portion 132 used to cover the fuse 122, allowing the second portion 132 to more effectively block the splash of the melt generated by the fuse 122, thereby protecting the first box wall 113. In addition, increasing the dimension L2 of the second portion 132 can also block the splash of the melt through the insulating member 13, thereby protecting other components within the battery device 10. For example, the first current collecting member 120 can be surrounded by a fixing member 14. Increasing the dimension L2 of the second portion 132 can also prevent the melt from splashing onto the fixing member 14.

[0113] Figure 11 A partial cross-sectional schematic diagram of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 11Shown as Figure 7 A possible cross-sectional schematic diagram of the battery device 10 is shown, where the cross-section is perpendicular to the length direction X of the battery device 10, i.e. Figure 11 For Yanru Figure 9 The cross-sectional view in the E-E' direction is shown. Figure 12 A partial cross-sectional schematic diagram of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 12 Shown as Figure 11 An enlarged view of area F is shown.

[0114] In some embodiments, the battery device 10 further includes: a fixing member 14, which is used to limit the first shell wall 201 and is located on the side of the first shell wall 201 facing the first box wall 113. The insulating member 13 further includes a third portion 133, which is at least partially located between the first current collecting component 120 and the fixing member 14 and at least covers the surface of the fuse portion 122 facing the fixing member 14. Figures 7 to 12 As shown, the fixing member 14 is attached to the side of the first shell wall 201 facing the first box wall 113 and can be used to compress and secure the battery cell 20, thereby improving the stability of the battery cell 20 within the box 11. A third portion 133 of the insulating member 13 is disposed between the fixing member 14 and the fuse portion 122 of the first busbar 120. In the event that the fuse portion 122 melts, the third portion 133 covering the surface of the third portion 133 can be used to block the melt generated by the melting portion 122, reducing the melt splashing onto the fixing member 14 and reducing the risk of damage to the fixing member 14. This can also reduce the generation of secondary short circuits within the battery device 10, thereby improving the stability and reliability of the battery device 10.

[0115] In some embodiments, a plurality of battery cells 20 are arranged in a row along a first direction, and the battery device includes at least two rows of battery cells 20 arranged along a second direction; the fixing member 14 extends along the first direction and connects to the housing 11; wherein the fixing member 14 limits the first shell wall 201 of the row of battery cells 20; or the fixing member 14 is located adjacent to two adjacent rows of battery cells 20 and limits the first shell walls 201 of the two rows of battery cells 20. For example, Figures 7 to 12 As shown, taking the first direction as the length direction X of the battery device 10 as an example, multiple battery cells 20 are arranged along the first direction. The same fixing member 14 can be provided to be attached to the first shell wall 201 of the multiple battery cells 20 to simultaneously fix the multiple battery cells 20, thereby reducing the number of fixing members 14 and facilitating installation.

[0116] In some embodiments, as Figures 7 to 12As shown, the fixing member 14 can also be used to fix multiple columns of battery cells 20 arranged along the second direction. For example, taking the second direction as the width direction of the battery device 10, the fixing member 14 is located adjacent to two adjacent columns of battery cells 20, and limits the first shell wall 201 of the two columns of battery cells 20, and then fixes the two columns of battery cells 20 arranged along the second direction through the fixing member 14; further, each column of battery cells 20 can also include multiple battery cells 20 arranged along the first direction to simplify the structure.

[0117] It should be understood that the fixing member 14 of the embodiment of the present application can be implemented by various structures. Figure 11 and Figure 12 As shown, the fixing member 14 of the embodiment of the present application may be a strip-shaped structure. For example, the fixing member 14 may be a pressure strip disposed on the surface of the first shell wall 201 and used to compress and fix the battery cell 20 .

[0118] In some embodiments, the fixing member 14 may also have other structures. Figure 13 Another partial cross-sectional schematic diagram of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 13 Shown as Figure 7 Another possible cross-sectional schematic diagram of the battery device 10 is shown, where the cross-section is perpendicular to the length direction X of the battery device 10, that is, Figure 13 Can be along Figure 9 The cross-sectional view in the E-E' direction is shown. Figure 14 A partial cross-sectional schematic diagram of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 14 Shown as Figure 13 An enlarged view of region G is shown.

[0119] In some embodiments, a beam 114 is provided in the box body 11, and the beam 114 is located between the second walls 204 of two rows of battery cells 20 arranged along the second direction, and the first shell wall 201 intersects the second wall 204. Figure 13 and Figure 14 As shown, the beams 114 within the box 11 can be used to divide the space inside the box 11 into multiple subspaces, each of which is used to accommodate the battery cells 20, thereby improving the stability of the battery cells 20 within the box 11. For example, taking the second direction as the width direction Y of the battery device 10, the beam 114 can be located between two columns of battery cells 20 arranged along the second direction and attached to the second walls 204 of the two columns of battery cells 20.

[0120] In some embodiments, the fixing member 14 is located on a side of the beam 114 facing the first box wall 113 and is an integral structure with the beam 114 . The fixing member 14 limits the first shell wall 201 of the two rows of battery cells 20 . Figure 13 and Figure 14 As shown, the fixing member 14 can be an integral structure with the beam 114. For example, the fixing member 14 can be a protruding structure on the side of the beam 114 facing the first box wall 113, so as to fix the two columns of battery cells 20 located on both sides of the beam 114 through the beam 114 and the fixing member 14, thereby improving the stability of the two columns of battery cells 20.

[0121] In some embodiments, the distance D2 between the surface of the first busbar 120 facing the fixing member 14 and the fixing member 14 is less than or equal to 30 mm, and / or the fixing member 14 is at least partially made of metal. Reducing the distance D2 between the first busbar 120 and the fixing member 14 also reduces the distance between the fuse 122 and the fixing member 14. This increases the contact area between the fixing member 14 and the first shell wall 201, improving the fixing effect of the fuse 122 on the battery cells 20. Furthermore, this increases the space utilization within the housing 11 of the battery device 10 and improves the energy density of the battery device 10. However, if the distance D2 between the first busbar 120 and the fixing member 14 is reduced, and if at least a portion of the fixing member 14 is made of metal, the risk of the fuse 122 impacting the fixing member 14 during melting increases. Therefore, providing an insulating member 13 covering the fuse 122 effectively prevents melt splashing, reduces the risk of impact on the fixing member 14 causing a short circuit, and improves the reliability of the battery device 10.

[0122] It should be understood that the structure of the third portion 133 located between the first conduit component 120 and the fixing member 14 can be set according to actual application. For example, the third portion 133 includes a first area 1331 and a second area 1332 that are relatively bent, the first area 1331 being located between the first shell wall 201 and the fixing member 14, and the second area 1332 being located between the fuse part 122 and the fixing member 14. Figures 7 to 14 As shown, the second region 1332 can be used to prevent the melt generated by the fuse 122 from destroying the fixing member 14; and the first region 1331 can be used to fix the insulating member 13 to the first shell wall 201 to improve the stability of the insulating member 13 and can also be used to improve the insulation reliability between the first shell wall 201 and the fixing member 14.

[0123] In some embodiments, the third portion 133 is connected to the second portion 132, or the third portion 133 and the second portion 132 are integrally formed to simplify the structure of the insulating member 13. Figures 7 to 14 As shown, the second area 1332 of the third part 133 can be bent relative to the second part 132, so that the insulating part 13 can simultaneously block the impact of the melt generated by the fuse part 122 on the first box wall 113 and the fixing part 14, thereby reducing the risk of secondary short circuit in the battery device 10 and improving the stability and reliability of the battery device 10.

[0124] In some embodiments, the third portion 133 may be provided separately from the second portion 132 , that is, the insulating member 13 may not be an integrally formed structure. Figure 15 Another partial cross-sectional schematic diagram of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 15 Can be as Figure 13 Another possible enlargement of region G is shown. Figure 14 and Figure 15 The difference is that the third part 133 and the second part 132 can be as follows Figure 15 The split arrangement shown is used to flexibly adjust the position and size of the third portion 133 according to the position of the fixing member 14, thereby improving the effect of the insulating member 13 in blocking the melt from splashing.

[0125] Figure 16 Another exploded structural diagram of the battery device 10 according to an embodiment of the present application is shown. Figure 17 Shown as Figure 16 The enlarged view of the area H is shown. Figure 16 and Figure 17 As shown, in some embodiments, the third portion 133 further includes a third region 1333 that is bent relative to the second region 1332. The third region 1333 is located between the first converging component 120 and the first box wall 113. The third region 1333 and the second portion 132 are stacked along the thickness direction of the second portion 132. The third region 1333 can be stacked and relatively fixed with the second portion 132 to achieve relative fixation between the third portion 133 and the second portion 132. In addition, the third region 1333 can also be used to prevent the melt generated by the fuse 122 from splashing.

[0126] In some embodiments, the third region 1333 is located between the second portion 132 and the first current collecting component 120 , so that the third region 1333 is clamped and fixed by the second portion 132 and the first current collecting component 120 , thereby improving the reliability and stability of the insulating member 13 .

[0127] In some embodiments, the third region 1333 is connected to the second portion 132, or the third region 1333 and the second portion 132 are integrally formed to simplify the structure of the insulating member 13 and facilitate processing and assembly. For example, the third portion 133 can be connected to the second portion 132 via the third region 1333, or the third region 1333 can be integrally formed with the second portion 132.

[0128] In some embodiments, the third region 1333 includes a main region 1335 and an extension region 1334 connected to the main region 1335. The extension region 1334 covers at least a portion of the surface of the fuse 122 facing the first housing wall 113. Along the width of the first converging member 120, a dimension L4 of the extension region 1334 is greater than a dimension L3 of the main region 1335. The provision of the extension region 1334 allows the third region 1333 to cover a larger area of ​​the fuse 122, thereby better preventing the melt generated by the fuse 122 from splashing.

[0129] In some embodiments, the third region 1333 may not be provided with the extension regions 1334 of different sizes. Figure 18 Another partial schematic diagram of the battery device 10 according to an embodiment of the present application is shown. Figure 18 Another possible implementation of the third area 1333 of the embodiment of the present application is shown. Figure 18 Can be replaced Figure 17 ,Right now Figure 18 Can be as Figure 16 Another possible enlarged view of the region H is shown. Figure 18 As shown, the third region 1333 may not be provided with extension areas 1334 of different sizes, that is, along the width direction of the first conduit component 120, the sizes of the third region 1333 are basically the same to simplify the structure of the third part 133 and facilitate processing.

[0130] Figure 19 A schematic top view of a partial structure of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 19 Shown as Figure 16 A top view of a partial structure of a battery device 10 is shown. Figure 20 Another partial structural diagram of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 20 Can be Figure 19 Schematic diagram of the enlarged area I.

[0131] In some embodiments, along the width direction of the first busbar 120, the dimension L5 of the portion of the third region 1333 covering the first busbar 120 is greater than or equal to 5 mm. Figure 19 and Figure 20As shown, taking the width direction of the first convergence component 120 as the width direction Y of the battery device 10 as an example, for the portion of the third area 1333 used to cover the first convergence component 120, for example, if the third area 1333 is provided with an extension area 1334, considering that the size of the extension area 1334 is larger, the size L5 of the portion of the main area 1335 covering the first convergence component 120 should be set to be greater than or equal to 5 mm; or, if the third area 1333 is not provided with an extension area 1334, the area with the smallest size along the width direction of the first convergence component 120 of the third area 1333 should be set to meet: the size of this partial area is greater than or equal to 5 mm, so as to increase the size of the overlapping area between the second part 132 and the third area 1333. In the case that the fuse part 122 is blown, the risk of the melt crossing the intersection area between the second part 132 and the third area 1333 can be reduced, thereby reducing the risk of the melt penetrating the first box wall 113, thereby improving the reliability of the battery device 10.

[0132] It should be understood that the material of the insulating member 13 in the embodiment of the present application can be set according to the actual application. For example, the first portion 131 and the second portion 132 can be provided separately, so that they are made of different materials. For another example, if the second portion 132 and the third portion 133 are an integral structure, the second portion 132 and the third portion 133 are generally made of the same material to facilitate processing. For another example, if the second portion 132 and the third portion 133 are provided separately, the second portion 132 and the third portion 133 can be made of the same or different materials.

[0133] For example, the material of the first portion 131 includes polycarbonate (PC), such as a conventional PC film. For another example, the material of the second portion 132 includes polyimide (PI) and / or ceramic silicone rubber. For another example, the material of the third portion 133 includes PI and / or ceramic silicone rubber. Both PI and ceramic silicone rubber meet design requirements such as temperature resistance and are easy to process.

[0134] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery device 10 described in any of the above schemes, and the battery device 10 is used to provide electrical energy to the electrical device.

[0135] The power-consuming device may be any of the aforementioned devices or systems using the battery device 10 .

[0136] According to some embodiments of the present application, the present application provides a battery device 10, including: a box body 11, the box body 11 includes a first box body wall 113; a plurality of battery cells 20, the plurality of battery cells 20 are accommodated in the box body 11, the first shell wall 201 of the battery cell 20 is provided with an electrode terminal 202, and the first shell wall 201 faces the first box body wall 113; a plurality of busbar components 12, for electrically connecting the plurality of battery cells 20, the plurality of busbar components 12 include a first busbar component 120, the first busbar component 120 includes a connecting portion 121 and a fuse portion 122, the connecting portion 121 is used to electrically connect the electrode terminals 202 of the plurality of battery cells 20, and at least a portion of the surface of the first busbar component 120 is arranged opposite to the first box body wall 113; an insulating member 13, the insulating member 13 is at least partially located between the first busbar component 120 and the first box body wall 113, and at least covers the surface of the fuse portion 122 facing the first box body wall 113.

[0137] The insulating member 13 includes a first portion 131 and a second portion 132 connected to each other. The first portion 131 covers at least a portion of the surface of the connecting portion 121 facing the first housing wall 113, and the second portion 132 covers the surface of the fuse portion 122 facing the first housing wall 113. The dimensions of the first portion 131 and the second portion 132 are different, and / or the materials of the first portion 131 and the second portion 132 are different. The thickness of the first portion 131 is smaller than that of the second portion 132, and / or the melting point of the material of the first portion 131 is lower than that of the material of the second portion 132. Along the width direction of the first conduit component 120, the second portion 132 is larger than the first portion 131.

[0138] The battery device also includes a fixing member 14, which is used to limit the position of the first housing wall 201 and is located on the side of the first housing wall 201 facing the first housing wall 113. The insulating member 13 also includes a third portion 133, which is at least partially located between the first current-collecting member 120 and the fixing member 14 and covers at least the surface of the fuse 122 facing the fixing member 14. The third portion 133 includes a first region 1331 and a second region 1332 that are bent relative to each other. The first region 1331 is located between the first housing wall 201 and the fixing member 14, and the second region 1332 is located between the fuse 122 and the fixing member 14. The third portion 133 also includes a third region 1333 that is bent relative to the second region 1332. The third region 1333 is located between the first current-collecting member 120 and the first housing wall 113. The third region 1333 and the second portion 132 are stacked along the thickness of the second portion 132. The third region 1333 includes a main region 1335 and an extension region 1334 connected to the main region 1335. The extension region 1334 covers at least a portion of the surface of the fuse portion 122 facing the first housing wall 113. Along the width direction of the first current converging member 120, the extension region 1334 is larger than the main region 1335. The third region 1333 is located between the second portion 132 and the first current converging member 120.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body (11), wherein the box body (11) comprises a first box body wall (113); A plurality of battery cells (20), the plurality of battery cells (20) being accommodated in the box (11), the first shell wall (201) of the battery cells (20) being provided with an electrode terminal (202), the first shell wall (201) facing the first box wall (113); A plurality of converging components (12) for electrically connecting a plurality of battery cells (20); the plurality of converging components (12) include a first converging component (120), the first converging component (120) including a connecting portion (121) and a fuse portion (122), the connecting portion (121) being used to electrically connect electrode terminals (202) of the plurality of battery cells (20); at least a portion of a surface of the first converging component (120) is disposed opposite to the first box wall (113); An insulating member (13), the insulating member (13) is at least partially located between the first confluence component (120) and the first box wall (113), and at least covers the surface of the fuse portion (122) facing the first box wall (113).

2. The battery device according to claim 1, wherein: The insulating member (13) comprises a first portion (131) and a second portion (132) connected to each other, the first portion (131) being used to cover at least a portion of a surface of the connecting portion (121) facing the first box wall (113), and the second portion (132) being used to cover a surface of the fuse portion (122) facing the first box wall (113); The size of the first portion (131) is different from the size of the second portion (132), and / or the material of the first portion (131) is different from the material of the second portion (132).

3. The battery device according to claim 2, characterized in that The thickness of the first portion (131) is smaller than the thickness of the second portion (132), and / or the melting point of the material of the first portion (131) is smaller than the melting point of the material of the second portion (132).

4. The battery device according to claim 2, wherein: The thickness T2 of the second portion (132) and the melting point P2 of the material of the second portion (132) satisfy one of the following conditions: P2≤300℃, and T2≥0.1mm; or 300℃≤P2≤500℃, and T2≥0.07mm; or P2≥500℃, and T2≥0.5mm.

5. The battery device according to claim 2, wherein: Along the width direction of the first conduit member (120), the size of the second portion (132) is larger than the size of the first portion (131).

6. The battery device according to claim 2, wherein: The battery device further comprises: A fixing member (14), the fixing member (14) is used to limit the first shell wall (201) and is located on a side of the first shell wall (201) facing the first box wall (113); the insulating member (13) further includes a third portion (133), the third portion (133) is at least partially located between the first conduit component (120) and the fixing member (14), and at least covers a surface of the fuse portion (122) facing the fixing member (14).

7. The battery device according to claim 6, characterized in that The third portion (133) includes a first region (1331) and a second region (1332) that are relatively bent, wherein the first region (1331) is located between the first shell wall (201) and the fixing member (14), and the second region (1332) is located between the fuse portion (122) and the fixing member (14).

8. The battery device according to claim 6, characterized in that The third part (133) is connected to the second part (132), or the third part (133) and the second part (132) are an integral structure.

9. The battery device according to claim 7, wherein: The third portion (133) further includes a third region (1333) bent relative to the second region (1332), the third region (1333) being located between the first conduit component (120) and the first box wall (113), and the third region (1333) and the second portion (132) being stacked along the thickness direction of the second portion (132).

10. The battery device according to claim 9, characterized in that Along the width direction of the first conduit member (120), the size of the portion of the third region (1333) covering the first conduit member (120) is greater than or equal to 5 mm.

11. The battery device according to claim 9, characterized in that The third region (1333) includes a main body region (1335) and an extension region (1334) connected to the main body region (1335), wherein the extension region (1334) covers at least a portion of the surface of the fuse portion (122) facing the first box wall (113); Along the width direction of the first conduit member (120), the size of the extension area (1334) is larger than the size of the main body area (1335).

12. The battery device according to claim 9, wherein: The third region (1333) is located between the second portion (132) and the first conduit component (120).

13. The battery device according to claim 9, characterized in that The third region (1333) is connected to the second portion (132), or the third region (1333) and the second portion (132) are an integral structure.

14. The battery device according to any one of claims 6 to 13, characterized in that The material of the second portion (132) includes polyimide and / or ceramic silicone rubber; and / or, The material of the third part (133) includes polyimide and / or ceramic silicone rubber.

15. The battery device according to any one of claims 6 to 13, characterized in that A plurality of battery cells (20) are arranged in a row along a first direction, and the battery device includes at least two rows of battery cells (20) arranged along a second direction; the fixing member (14) extends along the first direction and is connected to the box (11); wherein the fixing member (14) limits the first shell wall (201) of the battery cells (20) in one row; or the fixing member (14) is located adjacent to two adjacent rows of battery cells (20) and limits the first shell wall (201) of the two rows of battery cells (20).

16. The battery device according to any one of claims 6 to 13, characterized in that A beam (114) is provided in the box body (11), the beam (114) is located between the second walls (204) of two rows of battery cells (20) arranged along a second direction, the first shell wall (201) intersects with the second wall (204), the fixing member (14) is located on a side of the beam (114) facing the first box body wall (113), and is an integral structure with the beam (114); the fixing member (14) limits the first shell wall (201) of the two rows of battery cells (20).

17. The battery device according to any one of claims 6 to 13, characterized in that The distance between the surface of the first conduit component (120) facing the fixing member (14) and the fixing member (14) is less than or equal to 30 mm; and / or the fixing member (14) is at least partially made of metal.

18. The battery device according to any one of claims 1 to 13, characterized in that The distance between the surface of the fuse part (122) facing the first box wall (113) and the first box wall (113) is less than or equal to 30 mm.

19. The battery device according to any one of claims 1 to 13, characterized in that The first busbar component (120) includes a plurality of connecting portions (121), the plurality of connecting portions (121) including a first connecting portion (1211) and a second connecting portion (1212), the first connecting portion (1211) being used for electrically connecting to a first electrode terminal (211) of a first battery cell (21), the second connecting portion (1212) being used for electrically connecting to a second electrode terminal (221) of a second battery cell (22), and the fuse portion (122) being located between the first connecting portion (1211) and the second connecting portion (1212).

20. The battery device according to any one of claims 1 to 13, characterized in that The battery device comprises a plurality of current collecting components (12) arranged along a first direction, the insulating component (13) extending along the first direction and covering surfaces of the plurality of current collecting components (12) facing the first box wall (113), the plurality of current collecting components (12) including at least one first current collecting component (120), and the insulating component (13) covering the fuse portion (122) of at least one first current collecting component (120).

21. The battery device according to any one of claims 1 to 13, characterized in that The first shell wall (201) is provided with a pressure relief mechanism (203).

22. An electrical device, characterized in that: The invention comprises a battery device according to any one of claims 1 to 21, wherein the battery device is used to store or provide electrical energy.

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