Battery device, energy storage device, and power consuming device

Abstract

The application relates to the battery technical field, and provides a battery device, an energy storage equipment and a power utilization equipment. The battery device comprises a battery monomer assembly, a structural member arranged on at least one side of the battery monomer assembly, an output pole base fixed to the structural member, wherein the output pole base comprises a first surface, and the first surface faces the battery monomer assembly; an output pole terminal electrically connected to the battery monomer assembly and fixed to the output pole base; and a first insulating member arranged between the first surface and the battery monomer assembly, so that the equivalent electrical gap between the output pole base and the battery monomer assembly is increased through the first insulating member. The distance between the output pole base and the battery monomer assembly is shortened, the structural member is closer to the battery monomer assembly, the structure of the battery device is more compact, the volume of the battery device is reduced, and the battery device provided by the application has smaller volume and higher energy density under the condition of the same capacity.

Description

Technical Field

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

[0002] In related technologies, battery devices typically include battery cell components and output electrode bases. In order to reduce the size of the battery device, the output electrode base is placed close to the battery cell components and other components inside the battery device. However, this close proximity can affect the insulation performance between the output electrode base and the battery cell components and other components. Utility Model Content

[0003] This application at least solves or improves the technical problem of poor insulation performance of the output electrode base of the battery device in the related art.

[0004] Therefore, a battery device is proposed as a first aspect of the embodiments of this application.

[0005] A second aspect of the embodiments of this application proposes an energy storage device.

[0006] A third aspect of the embodiments of this application provides an electrical device.

[0007] In view of the above, according to a first aspect of the embodiments of this application, this application provides a battery device, including: a battery cell assembly including a plurality of electrically connected battery cells; a structural member disposed on at least one side of the battery cell assembly; an output electrode base disposed on one side of the battery cell assembly, the output electrode base being fixed to the structural member, the output electrode base including a first surface facing the battery cell assembly; an output terminal electrically connected to the battery cell assembly and fixed to the output electrode base; a first insulating member disposed between the first surface and the battery cell assembly; the output electrode base including: a first portion; a second portion protruding from one side of the first portion, the second portion being located between the first portion and the structural member; and a rib protruding from one side of the first portion, the rib and the second portion being located on the same side of the first portion.

[0008] The battery device proposed in this application includes a battery cell assembly, a structural component, an output electrode base, and an output terminal. The structural component is disposed on at least one side of the battery cell assembly, the output electrode base is fixed to the structural component, and the output terminal is electrically connected to the battery cell assembly. The output terminal is fixed to the output electrode base, and the side of the output electrode base facing the battery cell assembly is a first surface. A first insulating component is disposed between the first surface and the battery cell assembly. The first insulating component increases the equivalent electrical clearance between the output electrode base and the battery cell assembly or other metal components, thereby improving the insulation performance between the output electrode base and the battery cell assembly. In other words, while meeting the insulation performance requirements, this application embodiment achieves a reduction in the distance between the output electrode base and the battery cell assembly. The reduction in the distance between the battery cell assembly and the output electrode base allows the structural component to be closer to the battery cell assembly, making the battery device structure more compact and reducing the size of the battery device. Therefore, with the same capacity, the battery device provided in this application embodiment has a smaller size and higher energy density.

[0009] The output electrode base includes a first part and a second part. The second part protrudes from one side of the first part and is located between the first part and the structural member. The second part and the structural member are fixedly connected.

[0010] The output electrode base also includes a rib, which protrudes from the first part toward the second part, thereby extending the creepage path between the output electrode base and the structural component and improving the insulation performance of the output electrode base.

[0011] In some technical solutions, the first insulating element and the first surface may optionally be bonded together.

[0012] In this technical solution, the first insulating component is attached to the first surface of the output electrode base, reducing the space between the first insulating component and the output electrode base, and further reducing the distance between the battery cell assembly and the output electrode base.

[0013] In some technical solutions, optionally, the first insulating element covers the first surface.

[0014] In this technical solution, the first insulating element covers the first surface, thereby improving the insulation protection effect of the first insulating element on the output electrode base and reducing the possibility of local insulation failure of the output electrode base.

[0015] In some technical solutions, optionally, the shape of the side of the first insulator facing the output electrode base is the same as the shape of the first surface.

[0016] In this technical solution, the shape of the first insulating member facing the output electrode base is the same as the shape of the first surface. The first insulating member provides comprehensive protection for the first surface and reduces the portion of the first insulating member outside the first surface, thereby reducing the possibility of the first insulating member being scratched or dropped by other components or operators.

[0017] In some technical solutions, optionally, the output electrode base includes a first through hole, the opening of the first through hole is located on a first surface, and the first insulating member includes a second through hole, the second through hole and the first through hole being disposed opposite to each other.

[0018] In this technical solution, the output electrode base includes a first through hole, and the first insulating member includes a second through hole. The opening of the first through hole is located on the first surface, and the second through hole and the first through hole are arranged opposite to each other. The first insulating member avoids the first through hole, thereby facilitating the installation of other components on the output electrode base.

[0019] In some technical solutions, the first insulating element may optionally include at least one of polyimide insulating element, polyethylene terephthalate insulating element, polytetrafluoroethylene insulating element, and epoxy resin insulating element.

[0020] In this technical solution, the first insulating component includes at least one of polyimide insulating component, polyethylene terephthalate insulating component, polytetrafluoroethylene insulating component, and epoxy resin insulating component. The polyimide insulating component, polyethylene terephthalate insulating component, polytetrafluoroethylene insulating component, and epoxy resin insulating component all have good insulation properties.

[0021] In some technical solutions, the first insulating element may optionally include: a base layer; an adhesive layer disposed on the side of the base layer away from the first surface; and a protective layer disposed on the side of the adhesive layer away from the base layer.

[0022] In this technical solution, the first insulating component includes a base layer, an adhesive layer, and a protective layer. The protective layer is bonded to the side of the base layer facing the battery cell assembly through the adhesive layer. The protective layer protects the base layer, improves the reliability of the first insulating component, and reduces the possibility of damage to the base layer.

[0023] In some technical solutions, the base layer may optionally include at least one of polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene layer and epoxy resin base layer.

[0024] In this technical solution, the base layer includes at least one of polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene vinyl layer and epoxy resin base layer. The polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene vinyl layer and epoxy resin base layer all have good insulation properties.

[0025] In some technical solutions, the protective layer may optionally include a fluoropolymer protective layer.

[0026] In this technical solution, the protective layer includes a fluorinated polymer protective layer, which has good corrosion resistance and can cope with more complex chemical environments, thereby improving the reliability and service life of the first insulating component.

[0027] In some technical solutions, the structural component may optionally include a first recess, and at least a portion of the output electrode base is disposed within the first recess.

[0028] In this technical solution, the structural component includes a first recess, and at least a portion of the output electrode base is disposed in the first recess, thereby hiding a portion of the output electrode base in the structural component, reducing the volume of the output electrode base protruding from the structural component, and making it more conducive to the miniaturization of the battery device.

[0029] In some technical solutions, the output electrode base may optionally include a second surface and a third surface, the second surface being disposed on one side of the first surface and the third surface being located on the side of the first surface opposite to the second surface; wherein at least a portion of the second surface is located within the first recess, and the battery device may further include a second insulating member located between the second surface and the sidewall of the first recess; and / or at least a portion of the third surface is located within the first recess, and the battery device may further include a third insulating member located between the third surface and the sidewall of the first recess.

[0030] In this technical solution, the output electrode base also includes a second surface and a third surface. The second surface is disposed on one side of the first surface, and the third surface is located on the side of the first surface opposite to the second surface. The output electrode base as a whole is a three-dimensional structure, with the second surface and the third surface located on opposite sides of the first surface.

[0031] At least a portion of the second surface is located within the first recess, and the battery device further includes a second insulating member located between the second surface and the sidewall of the first recess, thereby improving the insulation performance between the second surface and the structural member.

[0032] At least a portion of the third surface is located within the first recess, and the battery device also includes a third insulating element located between the third surface and the sidewall of the first recess, thereby improving the insulation performance between the third surface and the structural element.

[0033] In some technical solutions, the first insulating element and the second insulating element may optionally be an integral structure; or the first insulating element and the third insulating element may be an integral structure; or the first insulating element, the second insulating element and the third insulating element may be an integral structure.

[0034] In this technical solution, the first insulating component and the second insulating component are integrated into one piece, thereby simplifying the structure of the battery device and facilitating the installation of the first insulating component, the second insulating component, and the output electrode base.

[0035] Alternatively, the first and third insulating components can be integrated into a single structure, thereby simplifying the structure of the battery device and facilitating the installation of the first and third insulating components and the output electrode base.

[0036] Alternatively, the first, second, and third insulating components can be integrated into a single structure, thereby simplifying the structure of the battery device and facilitating the installation of the first, second, and third insulating components and the output electrode base.

[0037] In some technical solutions, optionally, the second part protrudes from the middle position of the first part; the rib includes a first rib and a second rib, and the second part is located between the first rib and the second rib.

[0038] In this technical solution, the second part protrudes from the middle of the first part, so that the output electrode base can be more evenly fixed to the structural component.

[0039] The ribs include a first rib and a second rib, which are respectively disposed on both sides of the first part, thereby extending the creepage path between the output electrode base and the structural component on both sides of the second part, thereby improving the insulation performance of the output electrode base.

[0040] In some technical solutions, optionally, the two ends of the first rib are connected to the second part; and / or the two ends of the second rib are connected to the second part.

[0041] In this technical solution, the two ends of the first rib are connected to the second part respectively, thereby increasing the area of ​​the first rib distributed at the bottom of the first part, improving the reliability of the rib for creepage path extension, and thus improving the insulation performance of the output electrode base.

[0042] And / or the two ends of the second rib are respectively connected to the second part, increasing the area of ​​the second rib distributed at the bottom of the first part, improving the reliability of the rib for creepage path extension, thereby improving the insulation performance of the output electrode base.

[0043] In some technical solutions, optionally, a fourth insulating element is provided at the end of the rib facing away from the first part.

[0044] In this technical solution, a fourth insulating element is provided at the end of the rib facing away from the first part, thereby further increasing the insulation performance between the output pole base and the structural component.

[0045] In some technical solutions, the structural component may optionally be an end plate or a housing, and the structural component and the output electrode base may be arranged side by side on the same side of the battery cell assembly.

[0046] In this technical solution, the structural component is an end plate or a box, and the structural component and the output electrode base are arranged side by side on the same side of the battery cell assembly, thereby improving the reliability of fixing the output electrode base.

[0047] According to a second aspect of the embodiments of this application, an energy storage device is provided, including: a battery device as provided in the first aspect of the embodiments of this application.

[0048] The energy storage device proposed in this application includes the battery device provided in the first aspect of this application, and therefore has the same beneficial effects as the battery device provided in the first aspect of this application, which will not be described in detail here.

[0049] According to a third aspect of the embodiments of this application, an electrical device is provided, including: a battery device as provided in the first aspect of the embodiments of this application; or an energy storage device as provided in the second aspect of the embodiments of this application.

[0050] The electrical equipment proposed in this application includes the battery device provided in the first aspect of this application or the energy storage device provided in the second aspect of this application. Therefore, it has the beneficial effects of the battery device provided in the first aspect of this application or the energy storage device provided in the second aspect of this application, which will not be described in detail here.

[0051] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0052] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0053] Figure 1 This is one of the structural schematic diagrams of the battery device in some embodiments of this application;

[0054] Figure 2 This is a second schematic diagram of the battery device in some embodiments of this application;

[0055] Figure 3 This is a schematic diagram of the structure of the structural components, output electrode base and first insulating component in the battery device in some embodiments of this application;

[0056] Figure 4 This is a schematic diagram of the structure of the structural components and the output electrode base in some embodiments of the battery device in this application;

[0057] Figure 5 This is a schematic diagram of the structure of the battery device in some embodiments of this application;

[0058] Figure 6 This is one of the structural schematic diagrams of the output electrode base and the first insulating member in some embodiments of the battery device of this application;

[0059] Figure 7 This is a cross-sectional view of the output electrode base and the first insulating member in some embodiments of the battery device of this application;

[0060] Figure 8 This is a second schematic diagram of the structure of the output electrode base and the first insulating element in the battery device of some embodiments of this application;

[0061] Figure 9 This is the third schematic diagram of the structure of the output electrode base and the first insulating element in the battery device in some embodiments of this application;

[0062] Figure 10 This is a schematic diagram of the structure of the output electrode base, the first insulating member, and the second insulating member in the battery device in some embodiments of this application;

[0063] Figure 11 This is a schematic diagram of the structure of the output electrode base, the first insulating member, and the third insulating member in the battery device in some embodiments of this application;

[0064] Figure 12 This is a schematic diagram of the structure of the output electrode base, the first insulating member, the second insulating member, and the third insulating member in the battery device in some embodiments of this application;

[0065] Figure 13 This is a schematic diagram of the structure of the structural components, output electrode base, second insulating component and third insulating component in the battery device in some embodiments of this application;

[0066] Figure 14 This is one of the structural schematic diagrams of the output electrode base in the battery device in some embodiments of this application;

[0067] Figure 15 This is the second schematic diagram of the structure of the output terminal base in the battery device in some embodiments of this application;

[0068] Figure 16 This is a schematic diagram of the structure of the output electrode base and the fourth insulating element in some embodiments of the battery device of this application;

[0069] Figure 17 This is a schematic diagram of the structure of the energy storage device in some embodiments of this application;

[0070] Figure 18 This is one of the structural schematic diagrams of the electrical equipment in some embodiments of this application;

[0071] Figure 19 This is a second schematic diagram of the structure of the electrical equipment in some embodiments of this application;

[0072] Figure 20 This is the third of several schematic diagrams of the electrical equipment in some embodiments of this application.

[0073] Icon labels:

[0074] 1. Electrical equipment;

[0075] 2. Energy storage equipment;

[0076] 3 Battery device, 31 Battery cell assembly, 311 Battery cell, 32 Structural component, 321 First recess, 322 Bottom, 323 Top, 33 Output electrode base, 331 First surface, 332 Second surface, 333 Third surface, 334 First part, 335 Second part, 336 Rib, 337 First rib, 338 Second rib, 339 First through hole, 34 First insulating component, 341 Base layer, 342 Adhesive layer, 343 Protective layer, 344 Second through hole, 35 Second insulating component, 36 Third insulating component, 37 Fourth insulating component, 38 Output terminal;

[0077] 4. Casing;

[0078] 5. Electrical components. Detailed Implementation

[0079] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0080] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0081] The following reference Figures 1 to 20 This application describes a battery device 3, an energy storage device 2, and an electrical appliance 1 provided according to some embodiments of the present application.

[0082] Currently, new energy batteries are being used more and more widely in daily life and industry. New energy is not only being used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also in various fields such as electric bicycles, electric motorcycles, electric cars, and electric ships. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0083] When batteries are used in high-pressure, humid, and condensing environments such as ships, creepage can easily occur between the output terminal base and the battery cell assembly or other metal parts, relying solely on air gaps for insulation.

[0084] Furthermore, the metal materials adjacent to the output electrode base are mostly grounded or at low potential. Therefore, if condensation or dust bridges the output electrode base and the metal components, the air insulation capacity drops sharply, posing a serious risk of short circuit.

[0085] In related technologies, increasing the creepage distance is usually used to improve the insulation performance between the output electrode base and the metal parts. However, increasing the creepage distance will lead to an increase in the volume of the output electrode base, which in turn will increase the volume of the battery device, thus affecting the overall energy density of the energy storage device.

[0086] Based on the above considerations, such as Figure 1 and Figure 2 As shown, in order to improve the reliability of the battery device 3 and take into account the energy density of the battery device 3, this application embodiment provides a battery device 3. The battery device 3 includes a battery cell assembly 31, a structural component 32, an output electrode base 33 and a first insulating component 34. The structural component 32 is located on one side of the battery cell assembly 31, the output electrode base 33 is fixed on the structural component 32, and the first insulating component 34 is disposed between the output electrode base 33 and the battery cell assembly 31.

[0087] This application embodiment improves the insulation performance between the output electrode base 33 and other metal components inside the battery cell assembly 31 or battery device 3 by providing a first insulating member 34 between the battery cell assembly 31 and the output electrode base 33, making the battery device 3 more adaptable to high-pressure, humid, and condensing environments such as ships.

[0088] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source, or in various energy storage devices that use batteries as energy storage elements. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0089] Creepage refers to the arcing phenomenon of current flowing along the surface of insulating material between conductive parts; creepage distance is the shortest path between two conductive parts measured along the surface of insulating material; clearance is the shortest straight-line distance between two conductive parts measured through air.

[0090] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 As shown, a battery device 3 is provided according to a first aspect of the present application. The battery device 3 includes a battery cell assembly 31, a structural member 32, and an output electrode base 33. The structural member 32 is disposed on at least one side of the battery cell assembly 31, and the output electrode base 33 is fixed to the structural member 32. The first surface 331 of the output electrode base 33 faces the battery cell assembly 31. The battery cell assembly 31 includes a plurality of electrically connected battery cells 311, and the plurality of battery cells 311 can be stacked.

[0091] The battery device 3 also includes an output terminal 38, which is electrically connected to the battery cell assembly 31. The output terminal 38 is fixed to the output terminal base 33, and the battery cell assembly 31 is charged or discharged through the output terminal 38.

[0092] The battery device 3 also includes a first insulating member 34, which is disposed between the battery cell assembly 31 and the output electrode base 33, and the first insulating member 34 and the first surface 331 are disposed opposite to each other.

[0093] The battery device 3 proposed in this application includes a battery cell assembly 31, a structural member 32, and an output electrode base 33. The structural member 32 is disposed on at least one side of the battery cell assembly 31, and the output electrode base 33 is fixed on the structural member. The side of the output electrode base 33 facing the battery cell assembly 31 is a first surface 331. A first insulating member 34 is disposed between the first surface 331 and the battery cell assembly 31 to increase the equivalent electrical clearance between the output electrode base 33 and the battery cell assembly 31 or other metal parts.

[0094] The battery cell assembly 31 includes one or more battery cells. Exemplarily, in the case where the battery cell assembly 31 includes multiple battery cells, the multiple battery cells are stacked sequentially.

[0095] Structural component 32 refers to a component that provides support, protection, or fixation for the output terminal base 33, battery cell assembly 31, or other components. Exemplarily, structural component 32 may be a side plate, end plate, housing, or reinforcing rib, etc. Structural component 32 may be made of metal.

[0096] The output electrode base 33 is a component used to fix and support the output electrode connecting piece or copper busbar. The output electrode base 33 also provides insulation protection for the output electrode connecting piece or copper busbar. Exemplarily, the output electrode base 33 can be made of plastic, aluminum, aluminum alloy, copper, copper alloy, or nickel-plated steel. The surface of the output electrode base 33 can be treated with insulation, such as anodizing, surface spraying, or surface coating. The output electrode base 33 and the structural component 32 can be connected by insulating components, such as plastic clips.

[0097] The first insulating element 34 is made of a high-resistivity material, for example, a high-resistivity material with a volume resistivity greater than or equal to 10. 12 Ohm-cm, of course, the first insulating element can also be made of high volume resistivity less than 10 ohms-cm. 12 Made of ohm-centimeter material.

[0098] The battery device 3 proposed in this application improves the insulation performance between components such as the output electrode base 33 and the battery cell assembly 31 by adding a first insulating member 34 between the output electrode base 33 and the battery cell assembly 31. That is, while meeting the insulation performance requirements, this application embodiment achieves a reduction in the distance between the output electrode base 33 and the battery cell assembly 31. The reduction in the distance between the battery cell assembly 31 and the output electrode base 33 allows the structural member 32 to be closer to the battery cell assembly 31, making the structure of the battery device 3 more compact and reducing the volume of the battery device 3. Therefore, with the same capacity, the battery device 3 provided in this application embodiment has a smaller volume and a higher energy density.

[0099] like Figure 1 and Figure 2 As shown, exemplarily, in the direction OX from the output electrode base 33 to the battery cell assembly 31, the thickness A of the first insulating member 34 ranges from greater than or equal to 0.05 mm and less than or equal to 1.0 mm.

[0100] The thickness A of the first insulating element 34 can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, or 1.0 mm.

[0101] Taking the first insulating component 34 made of a certain type of polyimide material as an example, in the direction OX from the output electrode base 33 to the battery cell assembly 31, a 0.05 mm thick first insulating component 34 has a withstand voltage of approximately 6 kV, which can provide good insulation protection for a general battery device 3; a 1 mm thick first insulating component 34 has a withstand voltage of approximately 150 kV, which can provide more reliable insulation protection for the battery device 3. When the thickness A of the first insulating component 34 is greater than 1 mm, it will lead to an increase in the space occupied by the first insulating component 34, thereby affecting the energy density of the battery device 3. However, due to the limitations of manufacturing difficulty and manufacturing cost, a first insulating component 34 with a thickness of 0.05 mm to 1.0 mm in the direction OX from the output electrode base 33 to the battery cell assembly 31 can reduce production costs while ensuring insulation protection. For the same weight of raw materials, the smaller the thickness A of the first insulating element 34, the more first insulating elements 34 can be produced, and the lower the cost of the first insulating element 34. However, when the size is smaller than a certain size, the increased manufacturing cost leads to an increase in overall cost. Therefore, a better balance can be achieved when the size of the first insulating element 34 is between 0.05 mm and 1 mm. Of course, in other embodiments of this application, the thickness A of the first insulating element 34 can also be less than 0.05 mm or greater than 1.0 mm.

[0102] like Figure 1 and Figure 2 As shown, optionally, in the direction OX from the output electrode base 33 to the battery cell assembly 31, the thickness A of the first insulating member 34 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0103] The thickness A of the first insulating element 34 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm or 0.3 mm.

[0104] Taking the first insulating component 34 as an example, which uses a certain type of polyimide material, in the direction OX from the output electrode base 33 to the battery cell assembly 31, the withstand voltage of the 0.1 mm first insulating component 34 is about 15 kV, which can provide good insulation protection for the battery device 3; the withstand voltage of the 0.3 mm first insulating component 34 is about 45 kV, which can provide more reliable insulation protection for the battery device 3.

[0105] The first insulator 34 with a size greater than or equal to 0.1 mm provides better insulation protection and has better strength, reducing the possibility of damage to the first insulator 34. The first insulator 34 with a size greater than 0.3 mm will affect the cost and energy density of the battery device 3 due to the increased cost and increased volume. Therefore, the first insulator 34 with a size between 0.1 mm and 0.3 mm is in a state of both cost and insulation performance being superior.

[0106] like Figure 1, Figure 2 and Figure 3 As shown, in some embodiments, the first insulating element 34 is attached to the first surface 331 of the output electrode base 33.

[0107] The first insulating element 34 is attached to the first surface 331 of the output electrode base 33, which reduces the need to set up an independent fixing bracket for the first insulating element 34 and reduces the space between the first insulating element 34 and the output electrode base 33.

[0108] Furthermore, this ensures that the first insulating member 34 and the first surface 331 of the output electrode base 33 are tightly connected.

[0109] In this embodiment, the close connection between the first insulating member 34 and the first surface 331 further reduces the distance between the battery cell assembly 31 and the output electrode base 33, optimizes the spatial components of the battery device 3, and is conducive to the miniaturization of the battery device 3 and the improvement of the energy density of the battery device 3.

[0110] For example, the first insulating member 34 and the first surface 331 of the output electrode base 33 are bonded together.

[0111] The first insulating member 34 and the first surface 331 of the output electrode base 33 are bonded together with an adhesive. The bonding process of the first insulating member 34 to the output electrode base 33 is simple and low-cost, which facilitates the installation and mating between the first insulating member 34 and the output electrode base 33.

[0112] The adhesive can be, but is not limited to, glue, double-sided tape, or solid glue.

[0113] For example, the first insulating element 34 and the output electrode base 33 are integrally formed.

[0114] The first insulating component 34 can be integrally formed with the output electrode base 33 through processes such as insert injection molding, thereby eliminating the installation steps of the first insulating component 34 and the output electrode base 33 and improving production efficiency.

[0115] For example, the first insulating element 34 is sprayed onto the output electrode base 33.

[0116] By spraying insulating material onto the first surface 331 of the output electrode base 33, the first insulating element 34 is set on the first surface 331. The spraying has strong coverage and reduces the difficulty of aligning the first insulating element 34 and the output electrode base 33, making it easier to manufacture and process.

[0117] like Figure 2 and Figure 6 As shown, in some embodiments, the first insulating element 34 covers the first surface 331.

[0118] The orthographic projection of the first surface 331 of the output electrode base 33 onto the first insulating member 34 falls within the first surface 331 of the output electrode base 33, and the first insulating member 34 can provide better insulation protection for the output electrode base 33.

[0119] In this embodiment, the first insulating member 34 covers the first surface 331, thereby improving the insulation protection effect of the first insulating member 34 on the output electrode base 33 and reducing the possibility of local insulation failure of the output electrode base 33.

[0120] like Figure 2 , Figure 4 and Figure 10 As shown, in some embodiments, the shape of the first insulating member 34 facing the output electrode base 33 is the same as the shape of the first surface 331.

[0121] The shape of the first insulating member 34 facing the output electrode base 33 is the same as the shape of the first surface 331, thereby reducing the material input of the first insulating member 34, reducing the cost, and reducing the volume of the first insulating member 34.

[0122] For example, when the first insulating member 34 is attached to the first surface 331, the first surface 331 is covered, and no protrusion of the first insulating member 34 is formed on the outer side of the output electrode base 33.

[0123] In this embodiment, the shape of the first insulating member 34 facing the output electrode base 33 is the same as the shape of the first surface 331. The first insulating member 34 provides comprehensive protection for the first surface 331 and reduces the portion of the first insulating member 34 outside the first surface 331, thereby reducing the possibility that the first insulating member 34 may be scratched or dropped by other components or operators.

[0124] like Figure 6 and Figure 7 As shown, in some embodiments, the output electrode base 33 includes a first through hole 339, the opening of the first through hole 339 is located on the first surface 331, the first through hole 339 can be used to install screws or other components, and the first insulating member 34 includes a second through hole 344, the second through hole 344 and the first through hole 339 are disposed opposite to each other.

[0125] The first through hole 339 and the second through hole 344 are connected, and the cross-sectional dimensions of the first through hole 339 and the second through hole 344 can be the same.

[0126] In this embodiment, the output electrode base 33 includes a first through hole 339, and the first insulating member 34 includes a second through hole 344. The second through hole 344 and the first through hole 339 are connected, that is, the first insulating member 34 avoids the first through hole 339, so that screws and other components can be inserted into the first through hole 339 of the output electrode base 33.

[0127] In some embodiments, the first insulating element 34 may be one or a mixture of polyimide insulating elements, polyethylene terephthalate insulating elements, polytetrafluoroethylene insulating elements, and epoxy resin insulating elements.

[0128] The first insulating component 34 includes at least one of a polyimide insulating component, a polyethylene terephthalate insulating component, a polytetrafluoroethylene insulating component, and an epoxy resin insulating component, wherein the polyimide insulating component, the polyethylene terephthalate insulating component, the polytetrafluoroethylene insulating component, and the epoxy resin insulating component all have good insulation properties.

[0129] In this embodiment, insulating components such as polyimide insulating components, polyethylene terephthalate insulating components, polytetrafluoroethylene insulating components, and epoxy resin insulating components have good insulation performance, good processability, and achieve cost control.

[0130] like Figure 8 As shown, in some embodiments, the first insulating element 34 includes a base layer 341, an adhesive layer 342, and a protective layer 343.

[0131] The base layer 341 faces the first surface 331, the protective layer 343 faces the battery cell assembly 31, and the adhesive layer 342 is located between the base layer 341 and the protective layer 343. The base layer 341 and the protective layer 343 are formed as a whole through the adhesive layer 342.

[0132] Since the battery cell assembly 31 usually contains corrosive chemical materials such as electrolyte, the protective layer 343 can reduce the possibility of corrosion of the base layer 341.

[0133] For example, the base layer 341, the adhesive layer 342, and the protective layer 343 have the same shape.

[0134] In this embodiment, the first insulating member 34 includes a base layer 341, an adhesive layer, and a protective layer 343. The protective layer 343 is bonded to the side of the base layer 341 facing the battery cell assembly 31 by the adhesive layer 342. The protective layer 343 protects the base layer 341, improves the reliability of the first insulating member 34, and reduces the possibility of damage to the base layer 341.

[0135] In some embodiments, the base layer 341 may be one or more of a polyimide base layer, a polyethylene terephthalate base layer, a polytetrafluoroethylene layer, and an epoxy resin base layer.

[0136] The base layer 341 includes at least one of polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene vinyl layer and epoxy resin base layer. The polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene vinyl layer and epoxy resin base layer all have good insulation properties.

[0137] In this embodiment, the polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene vinyl layer, and epoxy resin base layer have good insulation properties, good processability, and achieve cost control.

[0138] In some embodiments, the protective layer 343 includes a fluoropolymer protective layer.

[0139] In this embodiment, the protective layer 343 includes a fluorinated polymer protective layer, which has good corrosion resistance and can cope with more complex chemical environments, thereby improving the reliability and service life of the first insulating element 34.

[0140] like Figure 4 , Figure 5 and Figure 13 As shown, in some embodiments, the end of the structural member 32 is provided with a first recess 321, the first recess 321 provides installation space for the output electrode base 33, and at least a portion of the output electrode base 33 is disposed in the first recess 321.

[0141] The first recess 321 can extend from the side of the structural member 32 closest to the battery cell assembly 31 to the side of the structural member 32 furthest from the battery cell assembly 31 through the structural member 32.

[0142] In this embodiment, the structural member 32 includes a first recess 321, and at least a portion of the output electrode base 33 is disposed in the first recess 321, thereby hiding a portion of the output electrode base 33 in the structural member 32, reducing the volume of the output electrode base 33 protruding from the structural member 32, which is more conducive to the miniaturization of the battery device 3.

[0143] like Figure 5 and Figure 10 As shown, in some embodiments, the output electrode base 33 further includes a second surface 332 and a third surface 333 disposed on both sides of the first surface 331. The second surface 332 is disposed on one side of the first surface 331, and the third surface 333 is located on the side of the first surface 331 opposite to the second surface 332. At least a portion of the second surface 332 is located within the first recess 321. The battery device 3 further includes a second insulating member 35, which is located between the second surface 332 and the sidewall of the first recess 321.

[0144] The output electrode base 33 also includes a second surface 332 and a third surface 333. The second surface 332 is disposed on one side of the first surface 331, and the third surface 333 is located on the side of the first surface 331 away from the second surface 332. The output electrode base 33 is a three-dimensional structure, with the second surface 332 and the third surface 333 located on opposite sides of the first surface 331.

[0145] At least a portion of the second surface 332 is located within the first recess 321, and the battery device 3 also includes a second insulating member 35 located between the second surface 332 and the sidewall of the first recess 321.

[0146] For example, the first recess 321 may be located at the edge of the structural member 32, that is, at a position opposite to the third surface 333 where there is no structural member 32. Of course, the first recess 321 may be located in the middle of the structural member 32, at a position opposite to the third surface 333 where there is a structural member 32.

[0147] In this embodiment, since the output electrode base 33 extends into the structural member 32, in order to extend the equivalent electrical clearance between the structural member 32 and the output electrode base 33, a second insulating member 35 is provided between the second surface 332 and the structural member 32, thereby improving the insulation performance between the second surface 332 and the structural member 32.

[0148] like Figure 5 and Figure 11 As shown, in some embodiments, the output electrode base 33 further includes a second surface 332 and a third surface 333 disposed on both sides of the first surface 331. The second surface 332 is disposed on one side of the first surface 331, and the third surface 333 is located on the side of the first surface 331 opposite to the second surface 332. At least a portion of the third surface 333 is located within the first recess 321. The battery device 3 further includes a third insulating member 36, which is located between the third surface 333 and the sidewall of the first recess 321.

[0149] The output electrode base 33 also includes a second surface 332 and a third surface 333. The second surface 332 is disposed on one side of the first surface 331, and the third surface 333 is located on the side of the first surface 331 away from the second surface 332. The output electrode base 33 is a three-dimensional structure, with the second surface 332 and the third surface 333 located on opposite sides of the first surface 331.

[0150] At least a portion of the third surface 333 is located within the first recess 321, and the battery device 3 also includes a third insulating member 36 located between the third surface 333 and the sidewall of the first recess 321.

[0151] For example, the first recess 321 may be located at the edge of the structural member 32, that is, at a position opposite to the second surface 332 where there is no structural member 32. Of course, the first recess 321 may be located at the middle position of the structural member 32, and at a position opposite to the second surface 332 where there is a structural member 32.

[0152] In this embodiment, since the output electrode base 33 extends into the structural member 32, in order to extend the equivalent electrical clearance between the structural member 32 and the output electrode base 33, a third insulating member 36 is provided between the third surface 333 and the structural member 32, thereby improving the insulation performance between the third surface 333 and the structural member 32.

[0153] like Figure 5 , Figure 12 and Figure 13 As shown, in some embodiments, the output electrode base 33 further includes a second surface 332 and a third surface 333 disposed on both sides of the first surface 331. The second surface 332 is disposed on one side of the first surface 331, and the third surface 333 is located on the side of the first surface 331 opposite to the second surface 332. At least a portion of the second surface 332 is located within the first recess 321. The battery device 3 further includes a second insulating member 35, which is located between the second surface 332 and the sidewall of the first recess 321. At least a portion of the third surface 333 is located within the first recess 321. The battery device 3 further includes a third insulating member 36, which is located between the third surface 333 and the sidewall of the first recess 321.

[0154] The output electrode base 33 also includes a second surface 332 and a third surface 333. The second surface 332 is disposed on one side of the first surface 331, and the third surface 333 is located on the side of the first surface 331 away from the second surface 332. The output electrode base 33 is a three-dimensional structure, with the second surface 332 and the third surface 333 located on opposite sides of the first surface 331.

[0155] At least a portion of the second surface 332 is located within the first recess 321. The battery device 3 also includes a second insulating member 35 located between the second surface 332 and the sidewall of the first recess 321. At least a portion of the third surface 333 is located within the first recess 321. The battery device 3 also includes a third insulating member 36 located between the third surface 333 and the sidewall of the first recess 321.

[0156] In this embodiment, since the output electrode base 33 extends into the structural member 32, in order to extend the equivalent electrical clearance between the structural member 32 and the output electrode base 33, a second insulating member 35 is provided between the second surface 332 and the structural member 32, thereby improving the insulation performance between the second surface 332 and the structural member 32. A third insulating member 36 is provided between the third surface 333 and the structural member 32, thereby improving the insulation performance between the third surface 333 and the structural member 32.

[0157] like Figure 13As shown, in some embodiments, optionally, along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the size B1 of the second insulating member 35 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0158] Since the output electrode base 33 is usually partially inserted into the first recess 321, part of the output electrode base 33 is located in the first recess 321, so the second insulating member 35 only needs to cover a portion of the second surface 332.

[0159] Furthermore, the second insulating member 35 and the second surface 332 have sufficient connection strength. It has been verified that when the size B1 of the second insulating member 35 is 2 mm, the second insulating member 35 can block the structural member 32 and at least part of the second surface 332. When the size B1 of the second insulating member 35 is 5 mm, the second insulating member 35 can block the second surface 332 and the structural member 32. Moreover, in terms of insulation capability, the second insulating member 35 between 2 mm and 5 mm can provide good insulation protection for the output pole base 33.

[0160] Furthermore, considering cost and installation space, the size B1 of the second insulating element 35 is controlled between 2 mm and 5 mm, which can balance insulation performance and cost.

[0161] In this embodiment, along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the size B1 of the second insulating member 35 is greater than or equal to 2 mm and less than or equal to 5 mm, thereby improving the insulation effect of the second insulating member 35 between the output electrode base 33 and the structural member 32.

[0162] like Figure 13 As shown, in some embodiments, optionally, along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the dimension B2 of the third insulating member 36 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0163] Since the output electrode base 33 is usually partially inserted into the first recess 321, part of the output electrode base 33 is located in the first recess 321, so the third insulating member 36 only needs to cover a portion of the third surface 333.

[0164] Furthermore, the third insulating member 36 and the third surface 333 have sufficient connection strength. It has been verified that when the size B2 of the third insulating member 36 is 2 mm, the third insulating member 36 can block at least part of the third surface 333 and the structural member 32. When the size B2 of the third insulating member 36 is 5 mm, the third insulating member 36 can block the third surface 333 and the structural member 32. Moreover, in terms of insulation capability, the third insulating member 36 between 2 mm and 5 mm can provide good insulation protection for the output pole base 33.

[0165] Furthermore, considering cost and installation space, the size B2 of the third insulating component 36 is controlled between 2 mm and 5 mm, which can balance insulation performance and cost.

[0166] In this embodiment, along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the value of the dimension B2 of the third insulating member 36 is greater than or equal to 2 mm and less than or equal to 5 mm, thereby improving the insulation effect of the third insulating member 36 between the output pole base 33 and the structural member 32.

[0167] like Figure 13 As shown, in some embodiments, optionally, along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the size B1 of the second insulating member 35 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0168] Along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the value of the dimension B2 of the third insulating member 36 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0169] In this embodiment, along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the size B1 of the second insulating member 35 is greater than or equal to 2 mm and less than or equal to 5 mm, thereby improving the insulation effect of the second insulating member 35 between the output electrode base 33 and the structural member 32. Along the direction OY1 from the bottom 322 to the top 323 opening of the first recess 321, the size B2 of the third insulating member 36 is greater than or equal to 2 mm and less than or equal to 5 mm, thereby improving the insulation effect of the third insulating member 36 between the output electrode base 33 and the structural member 32.

[0170] In some embodiments, the first insulating member 34 and the second insulating member 35 are an integral structure.

[0171] In this embodiment, the first insulating member 34 and the second insulating member 35 are an integral structure, thereby simplifying the structure of the battery device 3 and facilitating the installation of the first insulating member 34, the second insulating member 35 and the output electrode base 33.

[0172] In some embodiments, the first insulating member 34 and the third insulating member 36 are an integral structure.

[0173] In this embodiment, the first insulating member 34 and the third insulating member 36 are an integral structure, thereby simplifying the structure of the battery device 3 and facilitating the installation of the first insulating member 34, the third insulating member 36 and the output electrode base 33.

[0174] In some embodiments, the first insulating member 34, the second insulating member 35, and the third insulating member 36 are an integral structure.

[0175] In this embodiment, the first insulating member 34, the second insulating member 35, and the third insulating member 36 are an integral structure, thereby simplifying the structure of the battery device 3 and facilitating the installation of the first insulating member 34, the second insulating member 35, the third insulating member 36, and the output electrode base 33.

[0176] like Figure 14 , Figure 15 and Figure 16 As shown, in some embodiments, the output electrode base 33 includes a first part 334 and a second part 335. The first part 334 is mainly used to fix the output electrode connecting piece or copper busbar, and the second part 335 is mainly used to connect and fix with the structural component 32.

[0177] The second part 335 protrudes from one side of the first part 334 and is located between the first part 334 and the structural member 32.

[0178] The output pole base 33 also includes a rib 336, which is disposed on one side of the first part 334. The rib 336 and the second part 335 are located on the same side of the first part 334.

[0179] In this embodiment, the output electrode base 33 includes a first part 334 and a second part 335. The second part 335 protrudes from one side of the first part 334 and is located between the first part 334 and the structural member 32. The second part 335 and the structural member 32 are fixedly connected.

[0180] In this embodiment, the output electrode base 33 further includes a rib 336, which protrudes from the first part 334 toward the second part 335. The rib 336 extends the creepage path between the output electrode base 33 and the structural member 32, thereby improving the insulation performance of the output electrode base 33.

[0181] like Figure 16 As shown, exemplarily, along the direction OY2 from the first portion 334 to the second portion 335, the height H of the rib 336 ranges from greater than or equal to 0.5 mm to less than or equal to 5.0 mm.

[0182] Along the direction OY2 from the first part 334 to the second part 335, when the height H of the rib 336 is less than 0.5 mm, the current has a limited length to bypass the rib 336 due to the small height H of the rib 336, which has a low effect on extending the creepage length. Therefore, along the direction OY2 from the first part 334 to the second part 335, the value of the height H of the rib 336 is greater than or equal to 0.5 mm.

[0183] Along the direction OY2 from the first part 334 to the second part 335, when the height H of the rib 336 is greater than 5 mm, the size of the output electrode base 33 increases due to the excessive height H of the rib 336, which affects the energy density of the battery assembly and the strength of the structural component 32. Therefore, the value range of the height H of the rib 336 is set to be less than or equal to 5 mm, which can effectively increase the effect of the rib 336 on extending the creepage path.

[0184] Along the direction OY2 from the first part 334 to the second part 335, the height H of the rib 336 is greater than or equal to 0.5 mm and less than or equal to 5.0 mm, thereby enabling the rib 336 to provide creepage distance and reduce the encroachment of the rib 336 on the structural member 32.

[0185] For example, along the direction OY2 from the first portion 334 to the second portion 335, the height H of the rib 336 can be 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, or 5.0 mm.

[0186] like Figure 16 As shown, optionally, along the direction OY2 from the first part 334 to the second part 335, the height H of the rib 336 is greater than or equal to 1 mm and less than or equal to 3 mm.

[0187] In the direction from the first part 334 to the second part 335, the height H of the raised rib 336 is 1 mm. Compared with the height H of the raised rib 336 being 0.5 mm, the creepage distance is increased by almost double, so it can provide better insulation protection and provide appropriate redundancy.

[0188] In the direction from the first part 334 to the second part 335, the height H of the rib 336 is 3 mm. Compared with the height H of the rib 336 being 5 mm, this can save some material, thereby reducing costs, while still providing reliable insulation protection.

[0189] Along the direction OY2 from the first part 334 to the second part 335, the height H of the rib 336 is greater than or equal to 1.0 mm and less than or equal to 3.0 mm, thereby enabling the rib 336 to increase the creepage distance sufficiently and reduce the size of the structural component 32, thus reducing production costs.

[0190] For example, along the direction OY2 from the first portion 334 to the second portion 335, the height H of the rib 336 is 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm or 3.0 mm.

[0191] like Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, optionally, along the direction OZ perpendicular to the first portion 334 to the second portion 335, the width W of the rib 336 is greater than or equal to 1.0 mm and less than or equal to 8.0 mm.

[0192] It has been verified that when the width W of the rib 336 is 1.0 mm along the direction OZ perpendicular to the first part 334 to the second part 335, the rib 336 has sufficient strength and increases the creepage distance by 1.0 mm for creepage.

[0193] Along the direction OZ perpendicular to the first part 334 to the second part 335, when the width W of the rib 336 is 8.0 mm, the rib 336 has sufficient strength and increases the creepage distance by 8.0 mm for creepage.

[0194] However, when the width W of the rib 336 is greater than 8.0 mm in the direction OZ perpendicular to the first part 334 to the second part 335, the size of the rib 336 will be too large, increasing the raw material cost and affecting the cost of the battery device 3.

[0195] For example, when the second part 335 is connected to both ends of the rib 336, the rib 336 and the second part 335 will enclose a cavity. Due to the limited size of the output electrode base 33, when the width W of the rib 336 is greater than 8.0 mm in the direction OZ perpendicular to the first part 334 to the second part 335, the size of the cavity will be too small, which may cause the current to pass directly through the cavity, making the top of the rib 336 located on opposite sides of the cavity directly conductive, thereby affecting the increase of creepage distance of the rib 336.

[0196] Therefore, along the direction OZ perpendicular to the first part 334 to the second part 335, the width W of the rib 336 is set to be greater than or equal to 1.0 mm and less than or equal to 8.0 mm.

[0197] Along the direction OZ perpendicular to the first part 334 to the second part 335, the width W of the rib 336 is greater than or equal to 1.0 mm and less than or equal to 8.0 mm, thereby improving the structural strength of the rib 336.

[0198] For example, along the direction OZ perpendicular to the first portion 334 to the second portion 335, the width W of the rib 336 is 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm or 8.0 mm.

[0199] like Figure 14 , Figure 15 and Figure 16 As shown, in some embodiments, the rib 336 is divided into two parts: a first rib 337 and a second rib 338. The second part 335 is located in the middle of the first part 334, so that the output pole base 33 can be more balancedly mounted on the structural member 32. The first rib 337 and the second rib 338 sandwich the second part 335 in the middle.

[0200] The second part 335 protrudes from the middle of the first part 334, thereby allowing the output electrode base 33 to be more evenly fixed to the structural member 32.

[0201] In this embodiment, the rib 336 includes a first rib 337 and a second rib 338. The first rib 337 and the second rib 338 are respectively disposed on both sides of the first part 334, thereby extending the creepage path between the output electrode base 33 and the structural member 32 on both sides of the second part 335, thereby improving the insulation performance of the output electrode base 33.

[0202] like Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, in some embodiments, the two ends of the first rib 337 are respectively connected to the second part 335.

[0203] The first rib 337 forms a "U" shape or an arc shape, and the two ends of the first rib 337 are respectively connected to the second part 335, thereby covering a larger area of ​​the first part 334.

[0204] In this embodiment, the two ends of the first rib 337 are respectively connected to the second part 335, thereby increasing the area of ​​the first rib 337 distributed at the bottom 322 of the first part 334, improving the reliability of the rib 336 for creepage path extension, and thus improving the insulation performance of the output electrode base 33.

[0205] like Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, in some embodiments, the two ends of the second rib 338 are respectively connected to the second portion 335.

[0206] The second rib 338 forms a "U" shape or an arc shape, and the two ends of the second rib 338 are respectively connected to the second part 335, thereby covering a larger area of ​​the first part 334.

[0207] In this embodiment, the two ends of the second rib 338 are respectively connected to the second part 335, thereby increasing the area of ​​the second rib 338 distributed at the bottom 322 of the first part 334, improving the reliability of the rib 336 for creepage path extension, and thus improving the insulation performance of the output electrode base 33.

[0208] like Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, in some embodiments, the two ends of the first rib 337 are respectively connected to the second part 335; the two ends of the second rib 338 are respectively connected to the second part 335.

[0209] The first rib 337 is shaped like a "U" or an arc, and its two ends are connected to the second part 335, thereby covering a larger area of ​​the first part 334. The second rib 338 is shaped like a "U" or an arc, and its two ends are connected to the second part 335, thereby covering a larger area of ​​the first part 334.

[0210] The first rib 337 and the second rib 338 may have the same or different shapes.

[0211] In this embodiment, the two ends of the first rib 337 are respectively connected to the second part 335, and the two ends of the second rib 338 are respectively connected to the second part 335, thereby increasing the area of ​​the first rib 337 and the second rib 338 distributed at the bottom 322 of the first part 334, improving the reliability of the rib 336 for creepage path extension, and thus improving the insulation performance of the output electrode base 33.

[0212] like Figure 16 As shown, in some embodiments, the battery device 3 may optionally include a fourth insulating member 37 disposed at one end of the rib 336 opposite to the first portion 334.

[0213] In this embodiment, a fourth insulating element 37 is provided at the end of the protruding rib 336 that is away from the first part 334, thereby increasing the insulation performance of the end of the protruding rib 336 and further increasing the insulation performance between the output pole base 33 and the structural member 32.

[0214] For example, the fourth insulating member 37 and the protruding rib 336 are bonded together. The bonding process is simple and low-cost, which facilitates the installation and mating between the fourth insulating member 37 and the output pole base 33.

[0215] The fourth insulating element 37 and the raised rib 336 are bonded together with an adhesive.

[0216] The adhesive can be, but is not limited to, glue, double-sided tape, or solid glue.

[0217] For example, the fourth insulating element 37 and the rib 336 are integrally formed, thereby eliminating the installation steps of the rib 336 and the output pole base 33 and improving production efficiency.

[0218] The fourth insulating component 37 can be integrally formed with the raised rib 336 through processes such as insert injection molding.

[0219] For example, the fourth insulating element 37 is sprayed onto the raised rib 336. The spraying has strong coverage and reduces the difficulty of aligning the fourth insulating element 37 and the raised rib 336, making it easier to manufacture and process.

[0220] By spraying insulating material onto the end of the rib 336, a fourth insulating element 37 is installed on the rib 336.

[0221] like Figure 1 As shown, in some embodiments, structural member 32 is an end plate, and structural member 32 and output electrode base 33 are arranged side by side on the same side of battery cell assembly 31.

[0222] The main function of the end plate is to clamp the battery cell assembly 31 and suppress the expansion of the battery cell assembly 31. The end plate also serves as the mounting base for some components.

[0223] In this embodiment, the structural component 32 is an end plate, and the structural component 32 and the output electrode base 33 are arranged side by side on the same side of the battery cell assembly 31, thereby improving the reliability of fixing the output electrode base 33.

[0224] like Figure 2 As shown, in some embodiments, the structural component 32 is a housing, and the structural component 32 and the output electrode base 33 are arranged side by side on the same side of the battery cell assembly 31.

[0225] The casing is the outer shell of the battery device, used to protect the battery device.

[0226] In this embodiment, the structural component 32 is a box, and the structural component 32 and the output electrode base 33 are arranged side by side on the same side of the battery cell assembly 31, thereby improving the reliability of fixing the output electrode base 33.

[0227] like Figures 1 to 16 As shown, the battery device 3 provided in this application embodiment has a first insulating member 34 and a raised rib 336 on the first surface 331 of the output electrode base 33. This solves the risk of insulation failure caused by insufficient electrical clearance between the output electrode base 33 and adjacent grounded or low-potential structural members 32 (such as housing, end plate or internal reinforcing ribs, etc.) in harsh environments in a compact, reliable and low-cost manner.

[0228] In this embodiment, the output electrode base 33 is made of a highly conductive metal material (such as aluminum alloy, copper, or nickel-plated steel) and is used to fix the positive and negative output terminals or copper busbars of the battery device 3 and to mount them on the end plate or housing. While maintaining the basic shape and mounting interface of the output electrode base 33, this embodiment integrates a composite insulation system on the first surface 331. The first surface 331 can be understood as the side opposite to the interior of the battery device 3. For example, the first surface 331 may be opposite to the battery cell assembly 31, or it may be opposite to other metal parts inside the battery device 3.

[0229] For example, a first insulating element 34 is firmly attached to the entire pressure-bearing surface of the first surface 331 of the output electrode base 33. The first insulating element 34 may be a membrane material.

[0230] The first insulating member 34 fits tightly against all areas of the first surface 331 of the output electrode base 33. The shape of the first insulating member 34 is consistent with the planar and curved contours of the first surface 331 of the output electrode base 33, achieving gapless coverage. For the first through hole 339 provided in the output electrode base 33, the first insulating member 34 is precisely punched or pre-drilled at the corresponding position, so as not to affect the normal passage and tightening of other components (such as bolts).

[0231] The first insulating element 34 is made of a material with high dielectric strength, excellent heat resistance (suitable for the battery operating temperature range, such as -40 degrees Celsius to 120 degrees Celsius), resistance to electrolyte corrosion, flame retardancy (such as a flame retardancy rating of UL94V-0), and good mechanical strength and adhesion. For example, it can be made of polyimide (PI), polyethylene terephthalate (PET), or polytetrafluoroethylene (PTFE), or it can be an epoxy resin insulating coating formed by spraying or curing. The thickness of the first insulating element 34 ranges from 0.05 mm to 1.0 mm, and further, the thickness of the first insulating element 34 ranges from 0.1 mm to 0.3 mm, to balance the insulation performance of the first insulating element 34 with its space occupation.

[0232] The first insulating element 34 can be bonded to the first surface 331 of the output electrode base 33 using a high-performance, high-temperature resistant pressure-sensitive adhesive (such as acrylic adhesive or silicone). Alternatively, a more integrated process, such as in-mold decoration or insert injection molding, can be used to integrally mold the first insulating element 34 onto the first surface 331 during the production of the metal material of the output electrode base 33, achieving a stronger bond and better sealing edges.

[0233] To further improve insulation reliability, especially in scenarios where condensation or contaminants may spread along the surface, at least one raised rib 336 is integrally formed on the first surface 331 of the output electrode base 33.

[0234] Rib 336 is a linear protrusion machined or cast directly from the output pole base 33. Its layout can be designed according to insulation requirements.

[0235] Along the direction OY2 from the first part 334 to the second part 335, the height H of the rib 336 is greater than or equal to 0.5 mm and less than or equal to 5.0 mm. Further, the height H of the rib 336 is greater than or equal to 1.0 mm and less than or equal to 3.0 mm. Along the direction OZ perpendicular to the first part 334 to the second part 335, the width W of the rib 336 is greater than or equal to 1.0 mm and less than or equal to 8.0 mm.

[0236] This embodiment of the application can increase the effective electrical clearance. When the output electrode base 33 is installed onto the structural member 32 by fasteners, the end of the protruding rib 336 will first contact or come very close to the surface of the structural member 32. This effectively and physically determines and maintains a minimum clearance between the output electrode base 33 and the end plate. In the clearance space, in addition to air, it is also filled with the solid medium of the first insulating member 34, thereby transforming the original "metal-air-metal" clearance structure into a composite insulation structure of "metal-first insulating member 34-(trace amount of air)-metal", significantly increasing the equivalent electrical clearance.

[0237] The embodiments of this application can extend the creepage distance. Any leakage current path that may be formed along the surface of the output electrode base 33 or the structural member 32 must go upwards and over the end of the protrusion 336 when it encounters the rib 336. The end of the protrusion 336 is provided with a fourth insulating member 37, and then continues downwards, thereby forcibly extending the actual surface leakage path length (creep distance).

[0238] When assembling the battery assembly 3, the output electrode base 33, which has been covered with the first insulating component 34 and has raised ribs 336, is installed and fixed with its first surface 331 facing the battery cell assembly 31 using bolts or other fasteners. After tightening, the raised ribs 336 are pressed against the surface of the structural component 32 or maintain a controlled micro-gap.

[0239] At this point, the following insulating medium exists between the output electrode base 33 (high potential) and the grounded structural member 32 (low potential): output electrode base 33 > first insulating member 34 > gap maintained by rib 336 > metal of structural member 32. The first insulating member 34 becomes the main insulator, with a dielectric strength much higher than that of air of the same thickness.

[0240] Even in extreme cases, such as severe vibration causing minor local wear of the insulating film or contaminant intrusion, the rib 336 can still extend the spatial distance and surface path length between two points, providing redundant protection and reducing the possibility of direct electrical short circuits or creepage breakdowns.

[0241] For example, to further eliminate the risk of edge creepage, a second insulating member 35 is provided on the second surface 332 of the output electrode base 33, and a third insulating member 36 is provided on the third surface 333. The first insulating member 34, the second insulating member 35, and the third insulating member 36 cover part of the sidewall of the output electrode base 33. For example, the covering height of the second insulating member 35 and the third insulating member 36 on the second surface 332 and the third surface 333 of the output electrode base 33 is 2 mm to 5 mm. The first insulating member 34, the second insulating member 35, and the third insulating member 36 are an integral structure, forming a U-shaped or L-shaped three-dimensional covering structure, which isolates the output electrode base 33 from the possible contact surface of the adjacent metal parts.

[0242] Furthermore, a fourth insulating element 37 is provided at the end of the rib 336. The fourth insulating element 37 can be bonded to the end of the rib 336 or it can be integrally formed with the rib 336. For example, during integral molding, a thicker insulating material layer can be directly covered at the end of the rib 336 to form an "insulating boss".

[0243] The first insulating element 34 can be made of multi-layer composite material. For example, the base layer 341 is made of PET film with high mechanical strength, the middle layer is an adhesive layer, and the protective layer 343 is made of fluorinated polymer film with excellent resistance to electrolyte corrosion in order to cope with more complex chemical environments.

[0244] like Figure 17 As shown, according to a second aspect of the embodiments of this application, an energy storage device 2 is provided, including: a battery device 3 as provided in the first aspect of the embodiments of this application.

[0245] The energy storage device 2 proposed in this application includes the battery device 3 as provided in the first aspect of this application, and therefore has the same beneficial effects as the battery device 3 provided in the first aspect of this application, which will not be described in detail here.

[0246] For example, such as Figure 17 As shown, the energy storage device 2 also includes a housing 4, and a battery device 3 is disposed inside the housing 4. The number of battery devices 3 disposed inside a housing 4 can be one or more.

[0247] According to a third aspect of the embodiments of this application, an electrical device 1 is provided, including: a battery device 3 as provided in the first aspect of the embodiments of this application; or an energy storage device 2 as provided in the second aspect of the embodiments of this application.

[0248] The electrical device 1 proposed in this application includes the battery device 3 provided in the first aspect of this application or the energy storage device 2 provided in the second aspect of this application. Therefore, it has the beneficial effects of the battery device 3 provided in the first aspect of this application or the energy storage device 2 provided in the second aspect of this application, which will not be described in detail here.

[0249] For example, the electrical equipment 1 also includes an electrical component 5, which may be a drive system, a lighting system, an acoustic system, or a heating system, etc., which will not be described in detail here.

[0250] like Figure 18 As shown, the electrical device 1 includes an electrical component 5 and a battery device 3. The battery device 3 is electrically connected to the electrical component 5 and is used to supply power to the electrical component 5. In this embodiment, the electrical component 5 may include a motor, and the electrical device 1 is a vehicle.

[0251] like Figure 19 As shown, the electrical equipment 1 includes an energy storage device 2 and an electrical component 5, which are electrically connected. The energy storage device 2 supplies power to the electrical component 5. In this embodiment, the electrical component 5 may include a motor, etc., and the electrical equipment 1 is a ship.

[0252] like Figure 20 As shown, the electrical equipment 1 includes an energy storage device 2 and an electrical component 5, which are electrically connected. The energy storage device 2 supplies power to the electrical component 5, which may include a charging device, etc. The charging device is used to charge an external device to be charged using the electrical energy provided by the energy storage device 2. In this embodiment, the electrical equipment 1 is a charging station.

[0253] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; "link" can mean a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0254] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the components or units referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0255] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do 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 one or more embodiments or examples.

[0256] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising multiple electrically connected battery cells; A structural component is disposed on at least one side of the battery cell assembly; An output electrode base is disposed on one side of the battery cell assembly. The output electrode base is fixed to the structural member. The output electrode base includes a first surface, which faces the battery cell assembly. The output terminal is electrically connected to the battery cell assembly and fixed to the output terminal base; A first insulating element is disposed between the first surface and the battery cell assembly; The output electrode base includes: Part One; The second part protrudes from one side of the first part and is located between the first part and the structural member; A rib protrudes from one side of the first part, and the rib and the second part are located on the same side of the first part.

2. The battery device according to claim 1, characterized in that, The first insulating element and the first surface are attached to each other.

3. The battery device according to claim 1, characterized in that, The first insulating element covers the first surface.

4. The battery device according to claim 3, characterized in that, The shape of the side of the first insulating member facing the output electrode base is the same as the shape of the first surface.

5. The battery device according to claim 1, characterized in that, The output electrode base includes a first through hole, the opening of which is located on the first surface. The first insulating member includes a second through hole, which is disposed opposite to the first through hole.

6. The battery device according to claim 1, characterized in that, The first insulating component includes at least one of polyimide insulating component, polyethylene terephthalate insulating component, polytetrafluoroethylene insulating component, and epoxy resin insulating component.

7. The battery device according to claim 1, characterized in that, The first insulating element includes: grassroots level; An adhesive layer is disposed on the side of the base layer opposite to the first surface; A protective layer is disposed on the side of the adhesive layer opposite to the base layer.

8. The battery device according to claim 7, characterized in that, The base layer includes at least one of polyimide base layer, polyethylene terephthalate base layer, polytetrafluoroethylene layer and epoxy resin base layer.

9. The battery device according to claim 7, characterized in that, The protective layer includes a fluorinated polymer protective layer.

10. The battery device according to claim 1, characterized in that, The structural component includes a first recess, and at least a portion of the output electrode base is disposed within the first recess.

11. The battery device according to claim 10, characterized in that, The output electrode base also includes a second surface and a third surface, the second surface being disposed on one side of the first surface, and the third surface being located on the side of the first surface opposite to the second surface; Wherein, at least a portion of the second surface is located within the first recess, and the battery device further includes a second insulating member located between the second surface and the sidewall of the first recess; and / or At least a portion of the third surface is located within the first recess, and the battery device further includes a third insulating member located between the third surface and the sidewall of the first recess.

12. The battery device according to claim 11, characterized in that, The first insulating element and the second insulating element are an integral structure; or The first insulating element and the third insulating element are an integral structure; or The first insulating element, the second insulating element, and the third insulating element are an integral structure.

13. The battery device according to any one of claims 1 to 12, characterized in that, The second part protrudes from the middle of the first part; The rib includes a first rib and a second rib, with the second portion located between the first rib and the second rib.

14. The battery device according to claim 13, characterized in that, The two ends of the first rib are respectively connected to the second part; and / or The two ends of the second rib are respectively connected to the second part.

15. The battery device according to claim 13, characterized in that, A fourth insulating element is provided at the end of the rib that is away from the first part.

16. The battery device according to any one of claims 1 to 12, characterized in that, The structural component is an end plate or a housing, and the structural component and the output electrode base are arranged side by side on the same side of the battery cell assembly.

17. An energy storage device, characterized in that, include: The battery device as described in any one of claims 1 to 16.

18. An electrical appliance, characterized in that, include: The battery device as described in any one of claims 1 to 16; or The energy storage device as described in claim 17.

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