Electric connector for battery device, battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses an electric connector for a battery device, the battery device and a power utilization device.The electric connector comprises a conductive core and an insulating fireproof wear-resistant part, the conductive core is provided with a first connecting part, a second connecting part and a third connecting part, and the first connecting part and the third connecting part are arranged at an interval; the second connecting part is connected between the first connecting part and the third connecting part; the insulating fireproof wear-resistant part is an integrated part and wraps the second connecting part, the first connecting part and the third connecting part are both exposed out of the insulating fireproof wear-resistant part, the insulating fireproof wear-resistant part is provided with uniformly distributed microcapsules, and each microcapsule comprises a capsule wall and a flame retardant filled in an accommodating space formed by the capsule wall. Therefore, the insulation, fire prevention and wear resistance are integrated through the insulation, fire prevention and wear resistance piece, reliable protection of the electric connecting piece is conveniently achieved, and the use reliability of the electric connecting piece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to an electrical connection member for a battery device, a battery device, and an electrical device using the same. Background Art

[0002] In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, the battery device, as the power source of the electric vehicle, plays an irreplaceable and important role.

[0003] In the battery device, electrical connection members such as wire harnesses and busbars are provided to achieve electrical connection between multiple components. Usually, the electrical connection members need to be insulated to work properly. When thermal runaway occurs in the battery device, the insulation of the electrical connection member is easily damaged by fire and fails. If the electrical connection member is used to transmit high-voltage signals, it is easy to cause high-voltage arcing and accelerate thermal runaway. If the electrical connection member is used to transmit low-voltage signals, it is easy to cause loss of low-voltage signals. Summary of the Utility Model

[0004] The present application provides an electrical connection member for a battery device, a battery device, and an electrical device using the same. By integrating insulation, fire protection, and wear resistance in an insulation fireproof and wear-resistant member, it is convenient to achieve reliable protection of the electrical connection member and improve the reliability of use of the electrical connection member.

[0005] In a first aspect, an embodiment of the present application provides an electrical connection member for a battery device, including: a conductive core having a first connection portion, a second connection portion, and a third connection portion, the first connection portion and the third connection portion being spaced apart, and the second connection portion being connected between the first connection portion and the third connection portion; an insulation fireproof and wear-resistant member, the insulation fireproof and wear-resistant member being an integral member and wrapping the second connection portion, the first connection portion and the third connection portion both being exposed outside the insulation fireproof and wear-resistant member, and the insulation fireproof and wear-resistant member having uniformly distributed microcapsules, the microcapsules including a capsule wall and a flame retardant filled in a accommodation space formed by the capsule wall.

[0006] In the above technical solution, by setting the insulating, fireproof and wear-resistant member as an integral part and wrapping the insulating, fireproof and wear-resistant member outside the second connecting portion, protective members such as PA12 (or polyamide 12), ceramic composite tape, foam, braided sleeve, heat shrinkable sleeve, etc. can be cancelled, which is beneficial to simplifying the production process of the electrical connector, reducing the production cost. At the same time, on the premise that the electrical connector can achieve the electrical connection function, the insulating, fireproof and wear-resistant member not only realizes the insulation of the electrical connector, but also realizes various protections of the electrical connector, that is, it also realizes the fireproof and wear-resistant functions of the electrical connector. It can still achieve reliable insulation of the electrical connector in different use environments such as thermal runaway, etc., which is convenient to meet higher application requirements, and is convenient to achieve good consistency in product quality. There is no need to additionally set other protective members for fireproof and wear-resistant functions. Considering the cooperation between the insulating, fireproof and wear-resistant member and other fireproof members, as well as the assembly sequence, the operation process is simplified; in addition, by setting the insulating, fireproof and wear-resistant member with uniformly distributed microcapsules, the high-temperature resistance, fireproof and flame-retardant effects of the insulating, fireproof and wear-resistant member can be further improved, and it is convenient to control the shell thickness of the capsule wall and select a suitable material for the capsule wall to realize the release of the internal flame retardant under specific conditions (such as high temperature), which is beneficial to appropriately delay the release time of the flame retardant and helps to provide a more effective protection effect when the material starts to burn; at the same time, the capsule wall stores the flame retardant as a carrier, which is convenient to protect the activity of the flame retardant during processing and use, is beneficial to reducing the failure risk of the flame retardant during high-temperature processing or long-term storage, and the flame retardant is encapsulated by the capsule wall, which is beneficial to reducing the negative impact of the flame retardant on the physical and mechanical properties of the insulating, fireproof and wear-resistant member; in addition, the microcapsules are uniformly dispersed in the insulating, fireproof and wear-resistant member, and the microcapsules are also easy to be uniformly distributed in the insulating, fireproof and wear-resistant member, which is beneficial to improving the fireproof and flame-retardant performance of the whole insulating, fireproof and wear-resistant member.

[0007] In some embodiments, the insulating, fireproof and wear-resistant member is a coating provided on the outer surface of the second connecting portion.

[0008] In the above technical solution, by setting the insulating, fireproof and wear-resistant member as a coating provided on the outer surface of the second connecting portion, it is beneficial to further simplify the production process of the electrical connector, reduce the types of materials, simplify the product structure, further reduce the production cost, and the coating is convenient to be applied relatively uniformly, which is convenient to further improve the product quality consistency of the electrical connector, improve the product cleanliness, reduce the risk of interference between the electrical connector and other components during the assembly process of the battery device, and at the same time is beneficial to improving the product aesthetics and visual effect.

[0009] In some embodiments, the electrical connector further includes: a primer layer provided between the second connecting portion and the insulating, fireproof and wear-resistant member.

[0010] In the above technical solution, by providing a primer layer between the outer surface of the second connecting portion and the insulating, fireproof and wear-resistant member, the adhesion of the insulating, fireproof and wear-resistant member can be improved, and the risk of the insulating, fireproof and wear-resistant member falling off the second connecting portion can be reduced. When the coating corresponding to the insulating, fireproof and wear-resistant member is applied on the primer layer, it is convenient to achieve uniform absorption of the coating corresponding to the insulating, fireproof and wear-resistant member, which is beneficial to improving the coating quality of the insulating, fireproof and wear-resistant member.

[0011] In some embodiments, the electrical connector further includes: a plasma treatment layer provided between the second connecting portion and the insulating, fireproof and wear-resistant member.

[0012] In the above technical solution, by providing a plasma treatment layer between the outer surface of the second connecting portion and the insulating, fireproof and wear-resistant member, the adhesion of the insulating, fireproof and wear-resistant member can be improved, and the risk of the insulating, fireproof and wear-resistant member falling off the second connecting portion can be reduced.

[0013] In some embodiments, the thickness of the insulating, fireproof and wear-resistant member is t, where 0.5 mm ≤ t ≤ 2 mm.

[0014] In the above technical solution, by setting the thickness of the insulating, fireproof and wear-resistant member within the range of 0.5 mm to 2 mm, it is convenient to ensure reliable insulation, fireproof and wear resistance of the electrical connector, and at the same time, the insulating, fireproof and wear-resistant member has good processability, is convenient for processing, and will not cause material waste due to excessive thickness or occupy a large space for the electrical connector.

[0015] In some embodiments, the insulating, fireproof and wear-resistant member has nano-enhanced particles.

[0016] In the above technical solution, by setting the insulating, fireproof and wear-resistant member to have nano-enhanced particles, the nano-enhanced particles can fill the minute unevenness on the surface of the insulating, fireproof and wear-resistant member to form a relatively smooth surface, reducing the surface friction coefficient of the insulating, fireproof and wear-resistant member to enhance its wear resistance.

[0017] In some embodiments, the nano-enhanced particles are alumina particles or silicon carbide particles.

[0018] In the above technical solution, by setting the nano-enhanced particles to be alumina particles or silicon carbide particles, both alumina particles and silicon carbide particles themselves have good wear resistance. These particles form a wear-resistant layer in the insulating, fireproof and wear-resistant member, which can enhance the surface hardness and wear resistance of the insulating, fireproof and wear-resistant member to resist friction and wear from the outside on the insulating, fireproof and wear-resistant member.

[0019] In some embodiments, the electrical connector is a high-voltage wire harness, a low-voltage wire harness or a bus bar.

[0020] In the above technical solution, at least one of the high-voltage wire harness, low-voltage wire harness, and bus bar in the battery device can be configured as the electrical connector in the embodiments of the present application, which is beneficial to improving the use reliability of the battery device, reducing the cost of the entire battery device, and facilitating the production of the battery device.

[0021] In some embodiments, the conductive core is an integrally bent and formed part.

[0022] In the above technical solution, by setting the conductive core as an integrally bent and formed part, the raw material can be directly bent into the final product shape, saving the processes of assembling multiple components. This not only saves assembly time but also saves the time loss caused by multiple clamping and positioning, improving production efficiency. Moreover, there are no gaps or weak points in the connection part during the assembly process in the conductive core, the overall structure of the product is more stable, facilitating the achievement of good quality consistency of the product, and at the same time being beneficial to reducing material waste and material cost.

[0023] In a second aspect, an embodiment of the present application provides a battery device, including a battery assembly and the above electrical connector. The battery assembly includes at least one battery cell, and one of the first connection part and the third connection part is connected to the corresponding battery cell.

[0024] In the above technical solution, since the battery device includes an electrical connector, and the electrical connector has certain insulation, fireproof, and wear-resistant properties, it is convenient to improve the use reliability of the battery device, and the battery device can meet higher application requirements, improving the product applicability.

[0025] In some embodiments, the electrical connector is a wire harness, and the battery device further includes: a box body having a receiving cavity, the battery assembly and the electrical connector are both disposed in the receiving cavity; a wire harness fixing structure disposed in the receiving cavity and fixed to the box body, and the wire harness fixing structure is in limit cooperation with the second connection part to fix the second connection part in the box body.

[0026] In the above technical solution, by setting the wire harness fixing structure to fix the second connection part in the box body, it is convenient to improve the position stability and shape stability of the second connection part. During the assembly process of the battery device, it is not easy to affect the assembly between components due to the relatively long length of the second connection part, which is beneficial to improving the assembly efficiency of the battery device.

[0027] In a third aspect, an embodiment of the present application provides an electrical device including the above battery device.

[0028] In the above technical solution, since the electrical device uses the above battery device, and the battery device has good use reliability and applicability, it is beneficial to improve the use reliability and applicability of the electrical device. Description of the Drawings

[0029] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 Schematic diagram of an electrical device provided for some embodiments of the present application;

[0031] Figure 2 Exploded view of a battery device provided for some embodiments of the present application;

[0032] Figure 3 Schematic diagram of a battery device provided for some embodiments of the present application;

[0033] Figure 4 For Figure 3 Enlarged view of part A circled in ;

[0034] Figure 5 For Figure 3 Schematic diagram of the electrical connector shown in ;

[0035] Figure 6 For Figure 5 Enlarged view of part B circled in ;

[0036] Figure 7 Schematic diagram of an electrical connector provided for some embodiments of the present application;

[0037] Figure 8 Partial cross-sectional view of an electrical connector provided for some embodiments of the present application;

[0038] Figure 9 Schematic diagram of the arrangement of multiple electrical connectors provided for some embodiments of the present application.

[0039] Reference numerals:

[0040] Electrical device 1000, battery device 100, controller 200, motor 300,

[0041] Electrical connector 1, conductive core 11, first connection portion 111, second connection portion 112, third connection portion 113, insulating, fireproof and wear-resistant member 12, primer layer 13,

[0042] Battery assembly 2, output terminal 20, battery cell 21,

[0043] Box body 3, accommodation cavity 30, first box body 31, second box body 32,

[0044] Wire harness fixing structure 4. Detailed description of the invention

[0045] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the following will clearly describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments, 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 drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects, rather than to describe a specific order or primary-secondary relationship.

[0047] Referring to "embodiments" in this application means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "attached" should be understood in a broad sense. For example, it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that three relationships can 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 represents an "or" relationship between the associated objects before and after.

[0050] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of simplicity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components shown in the drawings in the embodiments of this application are only for illustrative purposes and should not constitute any limitation to this application.

[0051] The "multiple" that appears in this application refers to two or more (including two).

[0052] In this application, the battery cell may include a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of this application are not limited thereto. The battery cell may be in a cylindrical shape, a flat shape, a cuboid shape or other shapes, and the embodiments of this application are not limited thereto either. Generally, the battery cells are divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of this application are not limited thereto.

[0053] The battery apparatus mentioned in the embodiments of this application may refer to an apparatus including one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a current collecting component. In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0054] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with a cable tie.

[0055] In some embodiments, the battery apparatus may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body. As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body. As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells in the box body. The box body can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0056] The battery cell includes a shell, an electrode assembly and an electrolyte. The shell is used to accommodate the electrode assembly and the electrolyte. In the present application, a soft-pack battery cell may refer to a battery cell using a soft outer packaging material as a shell. For example, the packaging film described herein may be used as the shell of a soft-pack battery cell. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0057] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0058] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role.

[0059] In a battery device, electrical connections between multiple components are achieved by providing electrical connectors, such as wiring harnesses, tabs, etc. Usually, the electrical connectors need to be insulated to achieve normal operation. When thermal runaway occurs in the battery device, the insulation of the electrical connectors can easily fail due to fire. If the electrical connectors are used to transmit high-voltage signals, it can easily cause high-voltage ignition and accelerate thermal runaway. If the electrical connectors are used to transmit low-voltage signals, it can easily cause the low-voltage signals to be lost.

[0060] Therefore, in some technologies, additional protective structures are provided for the electrical connector. For example, a ceramic composite tape (i.e., TC composite tape) is wound around the electrical connector to achieve fire protection, a foam is pasted outside the electrical connector to buffer the vibration received by the electrical connector and achieve wear prevention, and a braided sleeve, a heat shrinkable sleeve, etc. are wound around the electrical connector to improve the wear resistance performance. It can be seen that the above settings provide basic protection functions for the electrical connector to a certain extent. However, the winding of the outer protective structure is usually manual winding, and the winding and the combination of multiple materials result in inconsistent product quality and poor product consistency of the electrical connector. If multiple protection functions such as fire protection and wear resistance are to be considered, the setting of multiple materials increases the production cost of the product, and multiple materials require multiple processes. The complex assembly operation process also increases the production cost. At the same time, the complex multi-layer structure not only makes the product structure complex, but also makes the product untidy, easily interferes with other components during the assembly process, and affects the visual effect.

[0061] Obviously, it is difficult for the electrical connector of the current battery device to take into account multiple aspects such as fire protection, wear resistance, insulation performance, product consistency, and product cost. The protection of the electrical connector is limited and it is difficult to meet higher application requirements, which easily limits the use of the product.

[0062] Based on the above considerations, the present application proposes an electrical connector for a battery device. The electrical connector includes a conductive core and an insulating fireproof and wear-resistant member. The conductive core has a first connection portion, a second connection portion, and a third connection portion. The first connection portion and the third connection portion are arranged at intervals, the second connection portion is connected between the first connection portion and the third connection portion, the insulating fireproof and wear-resistant member is an integral part and wraps the second connection portion, the first connection portion and the second connection portion are both exposed outside the insulating fireproof and wear-resistant member, and the insulating fireproof and wear-resistant member has uniformly distributed microcapsules. The microcapsules include a capsule wall and a flame retardant filled in the accommodation space formed by the capsule wall.

[0063] In the above technical solution, by setting the insulating, fireproof and wear-resistant member as an integral member and wrapping the insulating, fireproof and wear-resistant member outside the second connecting portion, protective members such as PA12 (or polyamide 12), ceramic composite tape, foam, braided sleeve, heat shrinkable sleeve, etc. can be cancelled, which is beneficial to simplifying the production process of the electrical connector, reducing the production cost. At the same time, on the premise that the electrical connector can achieve the electrical connection function, the insulating, fireproof and wear-resistant member not only realizes the insulation of the electrical connector, but also realizes various protections of the electrical connector, that is, it also realizes the fireproof and wear-resistant functions of the electrical connector, and can still realize the reliable insulation of the electrical connector in different use environments such as thermal runaway, etc., which is convenient to meet higher application requirements, and is convenient to achieve good consistency in product quality, without additionally setting other protective members for fireproof and wear-resistant. Considering the cooperation between the insulating, fireproof and wear-resistant member and other fireproof members, as well as the assembly sequence, the operation process is simplified; in addition, by setting the insulating, fireproof and wear-resistant member with uniformly distributed microcapsules, the high-temperature resistance, fireproof and flame-retardant effects of the insulating, fireproof and wear-resistant member can be further improved, and it is convenient to control the shell thickness of the capsule wall and select a suitable material for the capsule wall to realize the release of the internal flame retardant under specific conditions (such as high temperature), which is beneficial to appropriately delaying the release time of the flame retardant and helps to provide a more effective protection effect when the material starts to burn; at the same time, the capsule wall stores the flame retardant as a carrier, which is convenient to protect the activity of the flame retardant during processing and use, is beneficial to reducing the failure risk of the flame retardant during high-temperature processing or long-term storage, and the flame retardant is encapsulated by the capsule wall, which is beneficial to reducing the negative impact of the flame retardant on the physical and mechanical properties of the insulating, fireproof and wear-resistant member; in addition, the microcapsules are uniformly dispersed in the insulating, fireproof and wear-resistant member, and the microcapsules are also easy to be uniformly distributed in the insulating, fireproof and wear-resistant member, which is beneficial to improving the fireproof and flame-retardant performance of the whole insulating, fireproof and wear-resistant member.

[0064] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in power systems of electrical devices such as vehicles, ships or aircraft. The power system of the electrical device can be composed of the battery device disclosed in the present application.

[0065] The embodiments of the present application provide an electrical device using a battery device as a power source. The electrical device can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecrafts, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys and electric aircraft toys, etc., and the spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0066] For the convenience of description in the following embodiments, a vehicle as an electrical device 1000 in an embodiment of the present application is taken as an example for description. Please refer to Figure 1 , Figure 1The structural schematic diagram of the power consumption device 1000 provided for some embodiments of this application is for a vehicle. The vehicle 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, an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle. The battery device 100 can be arranged at the bottom, head, or tail of the vehicle. The battery device 100 can be used for power supply of the vehicle. For example, the battery device 100 can be used as the operating power source of the vehicle. The vehicle can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start-up, navigation, and driving of the vehicle.

[0067] In some embodiments of this application, the battery device 100 can not only be used as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0068] Please refer to Figure 2 , Figure 2 The structural explosion diagram of the battery cell 21 provided for some embodiments of this application is for the battery device 100. The battery device 100 includes a box body 3 and a plurality of battery cells 21. The battery cells 21 are accommodated in the box body 3. Among them, the box body 3 is used to provide an assembly space for the battery cells 21, and the box body 3 can adopt various structures. In some embodiments, the box body 3 can include a first box body 31 and a second box body 32. The first box body 31 and the second box body 32 cover each other, and the first box body 31 and the second box body 32 jointly define an accommodation cavity 30 for accommodating the battery cells 21. The second box body 32 can be a hollow structure with one end open, and the first box body 31 can be a plate-like structure. The first box body 31 covers the open side of the second box body 32, so that the first box body 31 and the second box body 32 jointly define the accommodation cavity 30; or, the first box body 31 and the second box body 32 can also both be hollow structures with one side open (such as Figure 2 shown), and the open side of the first box body 31 covers the open side of the second box body 32. Of course, the box body 3 formed by the first box body 31 and the second box body 32 can be of various shapes, such as a cylinder, a cuboid, etc.

[0069] In the battery device 100, the plurality of battery cells 21 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the plurality of battery cells 21. The plurality of battery cells 21 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the plurality of battery cells 21 is accommodated in the box body 3; or, the battery device 100 can also be that the plurality of battery cells 21 are first connected in series, in parallel, or in a mixed connection to form the form of battery cell assemblies, and then the plurality of battery cell assemblies are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 3.

[0070] Among them, each battery cell 21 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 21 that can be activated by charging after discharging so as to be used continuously; it can also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto. Exemplarily, in Figure 2 the shape of the battery cell 21 is a cuboid.

[0071] Please refer to Figures 3 - 5 and Figure 7 , in the embodiments of the present application, the electrical connector 1 includes a conductive core 11. The conductive core 11 has a first connection portion 111, a second connection portion 112, and a third connection portion 113 arranged in sequence along the length direction of the conductive core 11. Then, the second connection portion 112 is connected between the first connection portion 111 and the third connection portion 113.

[0072] It can be understood that in the battery device 100, the electrical connector 1 can be used to realize the electrical connection of related electrical components, transmit electric energy, signals, etc. For example, the electrical connector 1 can be used to realize the electrical connection between battery cells 21 or to realize the electrical connection between battery modules. Additionally, for example, the electrical connector 1 can be used to transmit signals to realize functions such as acquisition, overcurrent protection, or short-circuit protection. Exemplarily, the electrical connector 1 can be a high-voltage wire harness. One of the first connection portion 111 and the third connection portion 113 is adapted to be connected to the output terminal 20 of the battery assembly 2 to realize the electrical connection between the electrical connector 1 and the battery assembly 2, so that the electrical connector 1 can transmit high-voltage electrical signals; alternatively, the electrical connector 1 can also be a low-voltage wire harness; or the electrical connector 1 can also be a tab (such as a high-voltage tab) for realizing the electrical connection of multiple battery cells 21.

[0073] As Figure 5 and Figure 7 shown, the electrical connector 1 further includes an insulating, fireproof, and wear-resistant member 12. The insulating, fireproof, and wear-resistant member 12 wraps around the second connection portion 112, and both the first connection portion 111 and the third connection portion 113 are exposed outside the insulating, fireproof, and wear-resistant member 12. That is, the insulating, fireproof, and wear-resistant member 12 does not wrap around the first connection portion 111 and the third connection portion 113. Then, the insulating, fireproof, and wear-resistant member 12 will not affect the electrical connection between the first connection portion 111 and other components, nor will it affect the electrical connection between the third connection portion 113 and other components. Moreover, the insulating, fireproof, and wear-resistant member 12 can separate the second connection portion 112 from surrounding components to realize the insulation setting of the electrical connector 1 and ensure the reliable transmission of electrical signals by the electrical connector 1.

[0074] It can be understood that the insulating, fireproof and wear-resistant component 12 can not only insulate the electrical connector 1, but also provide fireproofing, temperature resistance and wear resistance for the electrical connector 1, enabling the electrical connector 1 to have good insulation, fireproofing and wear resistance. Among them, the insulating, fireproof and wear-resistant component 12 is an integral part, which is convenient for simplifying the assembly process of the insulating, fireproof and wear-resistant component 12 and the second connecting part 112.

[0075] Compared with some technologies, in which multiple protective measures such as winding ceramic composite tapes, pasting foams, and winding braided sleeves around the electrical connector 1 are required to achieve multiple protections for the electrical connector 1, multiple assembly processes are needed, the production cost is relatively high, and the cooperation between multiple protective components and the assembly sequence of multiple protective components also need to be considered, resulting in a complex operation process. With the above settings in the present application, by setting the insulating, fireproof and wear-resistant component 12 as an integral part and wrapping the insulating, fireproof and wear-resistant component 12 outside the second connecting part 112, protective components such as PA12 (or polyamide 12) wrapping, ceramic composite tapes, foams, braided sleeves, and heat shrinkable sleeves can be eliminated, which is beneficial to simplifying the production process of the electrical connector 1, reducing the production cost. At the same time, on the premise that the electrical connector 1 can realize the electrical connection function, the insulating, fireproof and wear-resistant component 12 not only insulates the electrical connector 1, but also provides multiple protections for the electrical connector 1, and also realizes the fireproofing and wear resistance of the electrical connector 1, which is convenient for achieving good consistency in product quality and does not require additional protective components for fireproofing and wear resistance. There is no need to consider the cooperation between the insulating, fireproof and wear-resistant component 12 and other fireproof components, as well as the assembly sequence, thus simplifying the operation process.

[0076] It can be understood that when a thermal runaway occurs in the battery device 100, the insulating, fireproof and wear-resistant component 12 of the electrical connector 1 has good fireproof performance and is not easily burned out, improving the reliability and stability of the electrical connector 1 when working in a thermal runaway environment. If the electrical connector 1 transmits high-voltage signals, it can reduce the risk of high-voltage arcing caused by insulation failure of the electrical connector 1 and the risk of accelerating thermal runaway due to high-voltage arcing. If the electrical connector 1 transmits low-voltage signals, it can reduce the risk of low-voltage signal loss. Moreover, during the transportation or use of the electrical connector 1, the setting of the insulating, fireproof and wear-resistant component 12 can reduce the scratching of the electrical connector 1 by other surrounding components, reduce the wear of the electrical connector 1, and reduce the risk of insulation failure caused by wear of the outer insulation of the electrical connector 1. In other words, the insulating, fireproof and wear-resistant component 12 has certain fireproof and wear-resistant properties, can be applicable to different usage environments to a certain extent, and can still reliably insulate the electrical connector 1 in different usage environments, which is convenient for meeting higher application requirements and improving the applicability and practicality of the electrical connector 1.

[0077] It can be understood that the insulating, fireproof and wear-resistant member 12 can be tested for its insulation effect using a high-voltage insulation tester (an instrument used to measure the insulation resistance of electrical equipment and conduct insulation strength tests. Usually, a DC high-voltage generator is used to generate a high voltage, which is applied to the insulating part of the test piece. By measuring the leakage current flowing through the insulation resistance under the high voltage, the insulation resistance value is calculated according to Ohm's law to evaluate the insulation performance of the test piece; at the same time, by observing whether phenomena such as insulation breakdown occur in the equipment within a specified time, it is judged whether the insulation strength of the test piece meets the requirements).

[0078] Furthermore, as Figure 5 and Figure 7 shown, the insulating, fireproof and wear-resistant member 12 has uniformly distributed microcapsules, and the microcapsules include a capsule wall and a flame retardant filled in the accommodation space formed by the capsule wall.

[0079] It can be understood that the microcapsules can encapsulate the flame retardant in a tiny capsule wall, and the capsule wall can be a heat-resistant material made by physical or chemical methods. When the capsule wall is subjected to high temperature or mechanical stress, the capsule wall will rupture or decompose, releasing the core flame retardant, thereby playing a flame retardant role.

[0080] It can be seen that the microcapsules are constructed to release the flame retardant therein when heated or mechanically impacted, which can enhance the fireproof performance of the insulating, fireproof and wear-resistant member 12, further reduce the risk of the insulating, fireproof and wear-resistant member 12 failing due to being burned by fire, and further improve the use reliability of the electrical connector 1 in a thermal runaway environment through good fireproof performance; in the normal use state, the capsule wall can effectively store the flame retardant for a long time to prevent its leakage. When a thermal runaway occurs in the battery device 100, when the capsule wall encounters fire or high temperature and the temperature received by the capsule wall exceeds the softening point of the capsule wall, such as 150 °C, the capsule wall will be melted by heat and release the flame retardant stored in the microcapsules, playing a flame retardant role.

[0081] In the above technical solution, by setting the insulating, fireproof and wear-resistant member 12 to have uniformly distributed microcapsules, the high-temperature resistance, fireproof and flame retardant effects of the insulating, fireproof and wear-resistant member 12 can be further improved, and it is convenient to control the shell thickness of the capsule wall and select a suitable material for the capsule wall to realize the release of the internal flame retardant under specific conditions (such as high temperature), which is beneficial to appropriately delay the release timing of the flame retardant and helps to provide a more effective protection effect when the material starts to burn; at the same time, the capsule wall stores the flame retardant as a carrier, which is convenient for protecting the activity of the flame retardant during processing and use, is beneficial to reducing the risk of the flame retardant failing during high-temperature processing or long-term storage, and the flame retardant is encapsulated by the capsule wall, which is beneficial to reducing the negative impact of the flame retardant on the physical and mechanical properties of the insulating, fireproof and wear-resistant member 12; in addition, the microcapsules are uniformly dispersed in the insulating, fireproof and wear-resistant member 12, and the microcapsules are also easy to be uniformly distributed in the insulating, fireproof and wear-resistant member 12, which is beneficial to improving the fireproof and flame retardant performance of the entire insulating, fireproof and wear-resistant member 12.

[0082] In the embodiments of the present application, the type of the flame retardant is not specifically limited; for example, the flame retardant can be a nitrogen-containing flame retardant. When the nitrogen-containing flame retardant is heated, it decomposes to produce nitrogen gas. As an inert gas, nitrogen gas dilutes the combustible gas in the combustion area. Moreover, some nitrogen-containing compounds can promote the formation of a protective carbonized layer on the surface of the insulating fire-resistant and wear-resistant member 12, improving the high-temperature resistance and flame retardant performance, facilitating the insulating fire-resistant and wear-resistant member 12 to meet the UL94 V-0 standard; for another example, the flame retardant can be a high-efficiency phosphorus-based flame retardant. When the flame retardant is used, its flame retardant performance can be tested to ensure that it meets the safety standard. For example, a vertical burning test can be carried out according to the UL94 standard (a test standard for the combustion performance of materials formulated by Underwriters Laboratories (UL) in the United States, mainly used to evaluate the ability of plastics and other non-metallic materials to extinguish after being ignited) to verify the flame retardant effect.

[0083] In some embodiments, as Figure 5 , Figure 7 and Figure 8 shown, if the insulating fire-resistant and wear-resistant member 12 is a coating provided on the outer surface of the second connecting portion 112, the insulating fire-resistant and wear-resistant member 12 can be formed into a three-in-one functional coating, that is, the insulating fire-resistant and wear-resistant member 12 is formed into a single coating integrating the functions of insulation, fire resistance and wear resistance.

[0084] In the above technical solution, by setting the insulating fire-resistant and wear-resistant member 12 as a coating provided on the outer surface of the second connecting portion 112, it is beneficial to further simplify the production process of the electrical connector 1, reduce the types of materials, simplify the product structure, further reduce the production cost, and the coating is convenient to be applied relatively evenly, which is convenient to further improve the product quality consistency of the electrical connector 1, improve the product cleanliness, reduce the risk of interference between the electrical connector 1 and other components during the assembly of the battery device 100, and at the same time is beneficial to improving the product aesthetics and visual effect.

[0085] In addition, the coating has flexible color adjustability, which is convenient to make the product expressiveness of the electrical connector 1 cleaner and more modern by setting the color of the coating. It can be understood that when there are multiple electrical connectors 1 in the battery device 100, it is convenient to distinguish different electrical connectors 1 by different colors.

[0086] It can be understood that the coating is a solid continuous film obtained by applying the paint once or multiple times, and the insulating fire-resistant and wear-resistant member 12 can be a solid layer obtained by applying the corresponding paint on the outer surface of the second connecting portion 112. In the above solution, the application method of the corresponding paint for the insulating fire-resistant and wear-resistant member 12 is not specifically limited. For example, a one-time spraying method can be adopted, and of course, brushing, rolling, etc. can also be adopted.

[0087] In addition, in the above solution, the insulating, fireproof and wear-resistant member 12 may be in direct contact with the outer surface of the second connecting portion 112, or the insulating, fireproof and wear-resistant member 12 may be indirectly attached to the outer surface of the second connecting portion 112 (for example, a primer layer 13 and / or a plasma treatment layer are provided between the insulating, fireproof and wear-resistant member 12 and the second connecting portion 112).

[0088] Exemplarily, the insulating, fireproof and wear-resistant member 12 is formed by a one-time spraying method using a spraying device. The spraying device may include a spray gun (such as a high-precision spray gun, which can provide a more uniform atomization effect, thereby better controlling the coating thickness) and an automatic spraying system (such as including automation equipment and robots). By controlling the spray gun through the automatic spraying system, more precise control and a consistent spraying speed can be achieved; during the spraying process, appropriate spraying parameters can be set, such as spraying pressure, spraying flow rate, spraying distance, and spraying angle. Adjust the spraying pressure and spraying flow rate to ensure the uniformity of spraying. Excessive spraying pressure may cause overspray, while too low spraying pressure may result in uneven coating. At the same time, maintain an appropriate distance and angle between the spray gun and the surface of the second connecting portion 112, such as keeping the spray gun perpendicular to the surface to be sprayed, so as to improve the spraying effect. It can be understood that during the spraying process, control the spraying environment, maintain the temperature and humidity of the spraying environment, reduce the influence of the environment on the coating uniformity, and at the same time use the ventilation and exhaust system to achieve good ventilation to improve the problem of excessive accumulation of paint mist in the spraying chamber and improve the spraying effect.

[0089] Exemplarily, the spraying device may further include an on-line thickness gauge and a vision inspection system. The on-line thickness gauge can monitor the coating thickness in real time so as to adjust the parameters in time during the spraying process. The vision inspection system can detect the surface after spraying so as to identify and correct uneven areas.

[0090] It can be understood that for the paint corresponding to the insulating, fireproof and wear-resistant member 12, control the viscosity of the paint so that the paint is suitable for the spraying process. Too high or too low viscosity will affect the spraying uniformity; at the same time, before spraying, the paint is fully mixed to avoid problems such as uneven color or thickness during the spraying process.

[0091] In some embodiments, as Figure 8 shown, the electrical connector 1 further includes a primer layer 13. The primer layer 13 is provided between the second connecting portion 112 and the insulating, fireproof and wear-resistant member 12. Then the primer layer 13 wraps the second connecting portion 112, and the insulating, fireproof and wear-resistant member 12 wraps the primer layer 13.

[0092] In the above technical solution, by providing a primer layer 13 between the outer surface of the second connecting portion 112 and the insulating, fireproof and wear-resistant member 12, the adhesion of the insulating, fireproof and wear-resistant member 12 can be improved, and the risk of the insulating, fireproof and wear-resistant member 12 falling off the second connecting portion 112 can be reduced. When applying the corresponding coating of the insulating, fireproof and wear-resistant member 12 onto the primer layer 13, it is convenient to achieve uniform absorption of the corresponding coating of the insulating, fireproof and wear-resistant member 12, which is beneficial to improving the coating quality of the insulating, fireproof and wear-resistant member 12.

[0093] Exemplarily, the primer can be directly applied to the outer surface of the second connecting portion 112 to form the primer layer 13, which serves as a coating layer for the solid foundation of the insulating, fireproof and wear-resistant member 12. After providing the primer layer 13 on the outer surface of the second connecting portion 112, the insulating, fireproof and wear-resistant member 12 is directly applied onto the primer layer 13; the primer layer 13 can adopt a chemical undercoating method.

[0094] Exemplarily, the primer layer 13 can be a silane coupling agent layer.

[0095] Exemplarily, the conductive core 11 is a copper part, and a primer layer 13 containing mercaptan can be used to improve the adhesion by utilizing the chemical reaction between mercaptan and copper.

[0096] In some embodiments, the electrical connector 1 further includes a plasma treatment layer. The plasma treatment layer is provided between the second connecting portion 112 and the insulating, fireproof and wear-resistant member 12. Then, the plasma treatment layer wraps the second connecting portion 112, and the insulating, fireproof and wear-resistant member 12 wraps the plasma treatment layer.

[0097] In the above technical solution, by providing a plasma treatment layer between the outer surface of the second connecting portion 112 and the insulating, fireproof and wear-resistant member 12, the adhesion of the insulating, fireproof and wear-resistant member 12 can be improved, and the risk of the insulating, fireproof and wear-resistant member 12 falling off the second connecting portion 112 can be reduced.

[0098] It can be understood that after performing plasma treatment on the outer surface of the second connecting portion 112, a plasma treatment layer can be formed on the outer surface of the second connecting portion 112. Plasma treatment refers to using methods such as discharge, high-frequency electromagnetic oscillation, shock waves, and high-energy radiation to generate plasma from inert gases or oxygen-containing gases, and treating the surface to be bonded to change the surface properties, which is beneficial to improving the bonding performance and enhancing the bonding strength.

[0099] Exemplarily, the conductive core 11 is a metal component. Using plasma treatment can change the density of the surface of the conductive core 11, forming a transient polarity on the surface. Meanwhile, during the plasma treatment process, oxygen decomposes and polymerizes to generate ozone, and the ozone participates in changing the density of the surface of the conductive core 11, reducing the surface tension, without affecting other properties of the conductive core 11, thereby improving the adhesion of the insulating, fireproof and wear-resistant member 12. Moreover, the plasma treatment is a physical treatment, without generating waste liquid and waste gas, energy-saving and environmentally friendly, greatly reducing the production cost. In other words, using plasma treatment can classify the pollutants on the surface of the conductive core 11, and at the same time introduce polar groups, such as hydroxyl or carboxyl groups, to increase the surface energy and improve the adhesion.

[0100] Exemplarily, after the outer surface of the second connecting portion 112 is subjected to plasma treatment to form a plasma treatment layer, the insulating, fireproof and wear-resistant member 12 is directly coated on the plasma treatment layer.

[0101] In some other embodiments, the electrical connector 1 includes a primer layer 13 and a plasma treatment layer. The primer layer 13 can be provided between the plasma treatment layer and the insulating, fireproof and wear-resistant member 12, which can also improve the adhesion of the insulating, fireproof and wear-resistant member 12 and reduce the risk of the insulating, fireproof and wear-resistant member 12 falling off the second connecting portion 112.

[0102] In some embodiments, such as Figure 5 and Figure 6 shown, the thickness of the insulating, fireproof and wear-resistant member 12 is t, and 0.5 mm ≤ t ≤ 2 mm.

[0103] In the above technical solution, by setting the thickness of the insulating, fireproof and wear-resistant member 12 within the range of 0.5 mm to 2 mm, it is convenient to make the insulating, fireproof and wear-resistant member 12 have good processing performance and be convenient for processing on the premise of realizing reliable insulation, fireproof and wear-resistant of the electrical connector 1. At the same time, the insulating, fireproof and wear-resistant member 12 will not cause material waste due to excessive thickness or make the electrical connector 1 occupy a large space.

[0104] Exemplarily, the thickness of the insulating, fireproof and wear-resistant member 12 is 0.5 mm, 0.7 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, or 2 mm, etc.

[0105] In some embodiments, the insulating, fireproof and wear-resistant member 12 may also have an adhesive glue for the microcapsules. The glue is an inorganic substance and includes aluminum sol, silica sol, aluminum dihydrogen phosphate, and water glass (i.e., sodium silicate) to cooperate with the microcapsules to achieve better high-temperature resistance, insulation and heat insulation. The above inorganic substances may also include inorganic fillers, such as oxide ceramics (such as alumina, with a temperature resistance of 1800 °C), non-oxide ceramics (such as silicon carbide, with a temperature resistance of 2200 °C; and boron nitride, with good thermal conductivity and insulation), fiber reinforcement (such as aluminum silicate fiber, which can improve crack resistance; ceramic whiskers, such as silicon carbide whiskers), and expansion materials (such as expanded graphite, which expands when heated to isolate the flame; vermiculite, which insulates heat through its layered structure), etc.

[0106] In some embodiments, the insulating, fireproof and wear-resistant member 12 has nano-enhancing particles.

[0107] In the above technical solution, by providing that the insulating, fireproof and wear-resistant member 12 has nano-enhancing particles, the nano-enhancing particles can fill the minute unevenness on the surface of the insulating, fireproof and wear-resistant member 12 to form a relatively smooth surface, reduce the surface friction coefficient of the insulating, fireproof and wear-resistant member 12, improve the wear resistance of the insulating, fireproof and wear-resistant member 12, and reduce the risk of battery wear of the insulating, fireproof and wear-resistant member 12.

[0108] It can be understood that when using the nano-enhancing particles, their particle size and dispersibility can be tested to ensure the enhancement effect; for example, the Taber wear test (which is well-known to those skilled in the art and will not be elaborated here) is used to evaluate the wear resistance of the coating.

[0109] In some embodiments, the nano-enhancing particles are alumina particles or silicon carbide particles.

[0110] In the above technical solution, by providing that the nano-enhancing particles are alumina particles or silicon carbide particles, both the alumina particles and the silicon carbide particles themselves have good wear resistance. The above particles form a wear-resistant layer in the insulating, fireproof and wear-resistant member 12, which can enhance the surface hardness and wear resistance of the insulating, fireproof and wear-resistant member 12 to resist the friction and wear of the outside world on the insulating, fireproof and wear-resistant member 12.

[0111] In some embodiments, the electrical connector 1 is a high-voltage wire harness (such as Figure 5 and Figure 7As shown in the figure), a high-voltage wire harness, a low-voltage wire harness, or a bus bar. In other words, at least one of the high-voltage wire harness, the low-voltage wire harness, and the bus bar in the battery device 100 can be configured as the electrical connection member 1 in the embodiments of the present application, which is beneficial to reducing the cost of the entire battery device 100 and facilitating the production of the battery device 100. Among them, the high-voltage wire harness can connect the output terminal 20 of the corresponding battery cell 21 and the electrical structure, or the high-voltage wire harness connects the output terminal 20 of the corresponding battery cell 21 and the output control terminal of the battery pipeline system. The low-voltage wire harness is used to transmit low-voltage signals, and the bus bar can be used to achieve series, parallel, or series-parallel connection of multiple battery cells 21.

[0112] Exemplarily, when the electrical connection member 1 is a wire harness (a high-voltage wire harness or a low-voltage wire harness), the extension length of the second connection portion 112 is greater than the extension length of the first connection portion 111, and the extension length of the second connection portion 112 is greater than the extension length of the third connection portion 113. Further optionally, the extension length of the second connection portion 112 is greater than or equal to half of the overall extension length of the electrical connection member 1.

[0113] In some embodiments, such as Figure 5 and Figure 7 As shown in the figure, the conductive core 11 is an integrally bent and formed part, so the conductive core 11 is a single piece.

[0114] In the above technical solution, by setting the conductive core 11 as an integrally bent and formed part, the raw material can be directly bent into the final product shape, saving the processes of assembling multiple components. It not only saves the assembly time but also saves the time loss caused by multiple clamping and positioning, improving the production efficiency. Moreover, there are no gaps or weak points in the connection parts during the assembly process in the conductive core 11, and the overall structure of the product is more stable, facilitating the achievement of good quality consistency of the product. At the same time, it is beneficial to reducing material waste and lowering material costs.

[0115] It can be understood that when the conductive core 11 is an integrally bent and formed part, if the conductive core 11 is used for a wire harness (such as a high-voltage wire harness, a low-voltage wire harness), the wire harness can be a planar wire harness (for example, all parts of the wire harness are on the same plane) or a three-dimensional 3D wire harness (as Figure 5 and Figure 7 As shown in the figure, multiple parts of the wire harness are located on different planes).

[0116] Exemplarily, the conductive core 11 is an integrally bent and formed part, and the insulating, fireproof, and wear-resistant member 12 is a coating, which is convenient for comprehensively wrapping the second connection portion 112, with simple operation and can adapt to various structural forms of the conductive core 11.

[0117] Second aspect, an embodiment of the present application provides a battery device 100, including a battery assembly 2 and the above-mentioned electrical connection member 1. The battery assembly 2 includes at least one battery cell 21, and one of the first connection portion 111 and the third connection portion 113 is connected to the corresponding battery cell 21. Exemplarily, when the battery assembly 2 includes a plurality of battery cells 21, the battery assembly 2 can also be referred to as a battery cell 21 assembly.

[0118] As an example, the battery assembly 2 includes a plurality of battery cells 21, and the battery assembly 2 has an output terminal 20. The electrical connection member 1 is a high-voltage wire harness. One of the first connection portion 111 and the third connection portion 113 is connected to the output terminal 20 of the battery assembly 2, and the other of the first connection portion 111 and the third connection portion 113 can be connected to an electrical structure. In Figure 3 the example, the battery assembly 2 has two output terminals 20, namely a positive output terminal and a negative output terminal. Each output terminal is respectively connected to an electrical connection member 1. The two output terminals 20 can be respectively located at opposite ends of the battery assembly 2. Of course, the layout of the two output terminals 20 is not limited thereto.

[0119] In the above technical solution, since the battery device 100 includes the electrical connection member 1, and the electrical connection member 1 has certain insulation, fireproof, and wear-resistant properties, it is convenient to improve the use reliability of the battery device 100. The battery device 100 can meet higher application requirements and improve product applicability.

[0120] In some embodiments, as Figure 3 and Figure 4 shown, the battery device 100 further includes a box body 3. The box body 3 has a receiving cavity 30, and the battery assembly 2 and the electrical connection member 1 are both disposed in the receiving cavity 30. It can be understood that the electrical connection member 1 is disposed in the receiving cavity 30, which can mean that the electrical connection member 1 is completely disposed in the box body 3, or a part of the electrical connection member 1 is disposed in the box body 3 and a part extends out of the box body 3.

[0121] The electrical connection member 1 is a wire harness. The battery device 100 further includes a wire harness fixing structure 4. The wire harness fixing structure 4 is disposed in the receiving cavity 30, and the wire harness fixing structure 4 is fixed to the box body 3. The wire harness fixing structure 4 is in limit fit with the second connection portion 112 to fix the second connection portion 112 in the box body 3. It can be understood that the wire harness can be one or more.

[0122] In the above technical solution, by providing the wire harness fixing structure 4 to fix the second connection portion 112 in the box body 3, it is convenient to improve the position stability and shape stability of the second connection portion 112. During the assembly process of the battery device 100, it is not easy to affect the assembly between components due to the relatively long length of the second connection portion 112, which is beneficial to improving the assembly efficiency of the battery device 100.

[0123] In the embodiments of the present application, there are no specific limitations on the connection method between the wire harness fixing structure 4 and the box body 3, no specific limitations on the specific structure of the wire harness fixing structure 4, and no specific limitations on the cooperation method between the wire harness fixing structure 4 and the second connecting portion 112, as long as the wire harness fixing structure 4 can restrict the movement of the second connecting portion 112; for example, the wire harness fixing structure 4 may be formed with a through hole for the second connecting portion 112 to pass through.

[0124] In a third aspect, an electrical device 1000 according to an embodiment of the present application includes the above battery device 100, and the battery device 100 is used to provide electrical energy.

[0125] In the above technical solution, since the electrical device 1000 adopts the above battery device 100, and the battery device 100 has good use reliability and applicability, it is beneficial to improve the use reliability and applicability of the electrical device 1000.

[0126] Please refer to again Figure 5 、 Figure 6 and Figure 8 , to describe the electrical connector 1 of a specific embodiment of the present application.

[0127] The electrical connector 1 is a high-voltage wire harness, and the electrical connector 1 includes a conductive core 11, a primer layer 13, and an insulating, fireproof, and wear-resistant member 12. The conductive core 11 is a metal part and is integrally bent and formed. The conductive core 11 includes a first connecting portion 111, a second connecting portion 112, and a third connecting portion 113 arranged in sequence along the length direction of the wire harness. The primer layer 13 wraps the second connecting portion 112, and both the first connecting portion 111 and the third connecting portion 113 are exposed outside the primer layer 13. The insulating, fireproof, and wear-resistant member 12 is a coating applied to the primer layer 13. Among them, the thickness of the insulating, fireproof, and wear-resistant member 12 is t, and 0.5 mm ≤ t ≤ 2 mm.

[0128] In addition, the insulating, fireproof, and wear-resistant component 12 uses an insulating material matrix to achieve good insulating performance and facilitate maintaining relatively stable insulation in a high-temperature environment. The insulating, fireproof, and wear-resistant component 12 has uniformly distributed microcapsules, and the microcapsules include a capsule wall and a flame retardant filled in the accommodation space formed by the capsule wall; the insulating, fireproof, and wear-resistant component 12 has nano-enhanced particles. Optionally, the matrix of the insulating, fireproof, and wear-resistant component 12 can be an organosilicon-based polyurea matrix, a waterborne acrylic resin matrix, an epoxy resin matrix, etc. The matrix can be combined with lightweight fillers, such as expanded perlite, hollow glass microspheres, etc.; the material of the capsule wall can be urea-formaldehyde resin, polyurethane, etc., which can be controllably ruptured at high temperature to release the core flame retardant. The material of the capsule wall can also be combined with inorganic materials, such as silica or modified ceramic materials, to enhance the high-temperature resistance and stability of the capsule wall; the flame retardant can be an acid source, such as ammonium polyphosphate (APP for short), which decomposes at high temperature to generate phosphoric acid to promote carbonization and enhance the flame retardant effect; the flame retardant can also be a carbon source, such as pentaerythritol (PER for short), which reacts with the acid source to form an expanded carbon layer; the flame retardant can also be a foaming agent, such as melamine, which releases gases (such as NH3, CO2) when heated to form a porous heat-insulating layer.

[0129] The processing process of the electrical connector 1 includes: providing a conductive core 11; cleaning and drying the surface of the conductive core 11; then, spraying a primer on the surface of the conductive core 11 to form a primer layer 13 (the step of spraying the primer can also be replaced by performing plasma treatment on the surface of the conductive core 11 to form a plasma layer); spraying a coating on the surface of the primer layer 13 to form the insulating, fireproof, and wear-resistant component 12. Finally, after the electrical connector 1 is processed, it is subjected to an insulation voltage withstand sampling inspection.

[0130] In the above technical solution, the insulation, fireproof, and wear-resistant properties of the electrical connector can be achieved, which is beneficial to simplifying the production process of the electrical connector, reducing the production cost, and still enabling reliable insulation of the electrical connector in different use environments such as thermal runaway, etc., facilitating meeting higher application requirements, and facilitating achieving good consistency in product quality and appearance. There is no need to additionally set other protective components for fireproof and wear-resistant purposes. Considering the cooperation between the insulating, fireproof, and wear-resistant component and other fireproof components, as well as the assembly sequence, the operation process is simplified.

[0131] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0132] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An electrical connector for a battery device, characterized in that, Comprising: A conductive core having a first connection portion, a second connection portion, and a third connection portion, wherein the first connection portion and the third connection portion are spaced apart, and the second connection portion is connected between the first connection portion and the third connection portion; An insulating, fireproof, and wear-resistant member, which is an integral part and wraps around the second connection portion, with the first connection portion and the third connection portion both exposed outside the insulating, fireproof, and wear-resistant member. The insulating, fireproof, and wear-resistant member has uniformly distributed microcapsules, and each microcapsule includes a capsule wall and a flame retardant filled in the accommodation space formed by the capsule wall.

2. The electrical connection member for a battery device according to claim 1, wherein, The insulating, fireproof, and wear-resistant member is a coating provided on the outer surface of the second connection portion.

3. The electrical connection member for a battery device according to claim 2, wherein, Further comprising: A primer layer provided between the second connection portion and the insulating, fireproof, and wear-resistant member.

4. The electrical connector for a battery device according to claim 2, characterized in that, Further comprising: A plasma treatment layer provided between the second connection portion and the insulating, fireproof, and wear-resistant member.

5. The electrical connector for a battery device according to claim 1, characterized in that, The thickness of the insulating, fireproof, and wear-resistant member is t, where 0.5 mm ≤ t ≤ 2 mm.

6. The electrical connector for a battery device according to claim 1, characterized in that, The insulating, fireproof, and wear-resistant member has nano-enhanced particles.

7. The electrical connection member for a battery device according to claim 6, characterized in that, The nano-enhanced particles are alumina particles or silicon carbide particles.

8. The electrical connection member for a battery device according to claim 1, characterized in that, The electrical connector is a high-voltage wire harness, a low-voltage wire harness, or a tab.

9. The electrical connection member for a battery device according to any one of claims 1-8, characterized in that, The conductive core is an integrally bent and formed part.

10. A battery device, characterized in that, Comprising a battery assembly and an electrical connector for a battery device according to any one of claims 1-9, wherein the battery assembly includes at least one battery cell, and one of the first connection portion and the third connection portion is connected to the corresponding battery cell.

11. The battery device according to claim 10, characterized in that, The electrical connector is a wire harness, and the battery device further comprises: A box body having an accommodation cavity, wherein the battery assembly and the electrical connector are both disposed in the accommodation cavity; A wire harness fixing structure disposed in the accommodation cavity and fixed to the box body. The wire harness fixing structure is in limit fit with the second connection portion to fix the second connection portion in the box body.

12. An electrical device, characterized in that, Comprising the battery device according to claim 10 or 11.

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