Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment. The battery device comprises a box body; the battery monomers are arranged in the box body; a confluence component which is electrically connected with the plurality of battery cells; the temperature sampling assembly comprises a shell assembly and a temperature detection piece, the temperature detection piece is configured to detect the temperature of the single battery, and the shell assembly wraps the outer side of the temperature detection piece; wherein the shell assembly comprises a heat conduction part and a heat insulation part, an open type first containing cavity is formed in the heat conduction part, the temperature detection part is arranged in the first containing cavity, and the heat insulation part is detachably connected with the heat conduction part so as to seal part of the first containing cavity.

Description

Technical Field

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

[0002] In existing technologies, in order to ensure the safety of individual battery cells, temperature sampling components are generally installed in the battery device. These components can collect and monitor the temperature of individual battery cells during use to obtain information about the battery's operating status. However, the stability and reliability of temperature sampling by these components are generally limited. Utility Model Content

[0003] This application provides a battery device and an electrical appliance to address the technical problem of improving the reliability of temperature sampling in a battery device.

[0004] This application provides a battery device, including:

[0005] Box;

[0006] The battery cell is housed inside the casing;

[0007] A busbar component, wherein the busbar component is electrically connected to a plurality of the battery cells;

[0008] A temperature sampling assembly includes a housing assembly and a temperature detection element, the temperature detection element being configured to detect the temperature of the battery cell, the housing assembly covering the outside of the temperature detection element; wherein, the housing assembly includes a thermally conductive element and a thermally insulating element, the thermally conductive element forming an open first receiving cavity, the temperature detection element being disposed within the first receiving cavity, and the thermally insulating element being detachably connected to the thermally conductive element to partially close the first receiving cavity.

[0009] This embodiment of the application configures the housing assembly of the temperature sampling component as having a detachable heat-conducting component and a heat-insulating component. When the heat-conducting component and the heat-insulating component are connected, the heat-insulating component can seal the first receiving cavity of the heat-conducting component, reducing the assembly difficulty of the temperature sensing component and improving its sealing performance. When the heat-conducting component and the heat-insulating component are detached, the heat-conducting component can be used independently of the temperature sensing component, improving the flexibility of the temperature sampling component to adapt to more sampling needs.

[0010] In some embodiments, the thermal conductivity of the heat-conducting element is higher than that of the heat-insulating element.

[0011] In this embodiment, the heat generated by the battery cell is conducted as much as possible from the heat-conducting component with high thermal conductivity to the temperature detection component, while the heat is conducted as little as possible from the heat insulation component with low thermal conductivity to the temperature detection component. This reduces the risk of heat from other components being conducted to the temperature detection component, thereby reducing interference from the temperature detection component to the battery cell temperature detection and improving the sensitivity of the temperature detection component to the battery cell temperature. Furthermore, by making the thermal conductivity of the heat insulation component lower than that of the heat-conducting component, the heat from the battery cell is directly transferred to the temperature detection component through the heat-conducting component. This also helps to mitigate the risk of heat from the busbar component being transferred to the heat insulation component, thereby reducing the impact of the temperature from the busbar component on the temperature detection component. This improves the accuracy and precision of the temperature detection component in detecting the battery cell temperature, enabling the temperature sampling component to more effectively obtain the usage status of the battery cells inside the battery, thus improving the battery's stability and reliability.

[0012] In some embodiments, the heat-conducting element is a metal element, and the heat-insulating element is a non-metal element.

[0013] This application employs a detachable, nested temperature sampling housing assembly structure. Based on different application requirements, it enables independent use of the single-metal housing temperature sampling structure, as well as the application of a nested temperature sampling structure in conjunction with a non-metallic plug-in structure. The metal components can be externally glued for bonding and thermal conductivity with the temperature-sensing surface of the busbar component. The non-metallic insulation component has low thermal conductivity, which helps to isolate the temperature influence of non-sensing surfaces, thereby improving the detection accuracy of the temperature sensor.

[0014] In some embodiments, the heat insulation element has an internal recess forming a second receiving cavity, and the heat-conducting element is detachably disposed within the second receiving cavity to at least partially close the first receiving cavity.

[0015] In this embodiment, a second receiving cavity is formed by recessing the heat insulation component, allowing the heat-conducting component to be detachably disposed within the second receiving cavity to seal the first receiving cavity. This extends the conduction path from the first receiving cavity to the outside of the housing assembly, thus extending the path for water vapor conduction and improving the sealing performance of the housing assembly.

[0016] In some embodiments, the heat insulation component is provided with a limiting groove, which is located on the side of the heat insulation component near the second receiving cavity, and the heat conducting component is provided with a guide portion, which can be adapted to the limiting groove.

[0017] This embodiment of the application achieves detachable installation of the heat insulation component and the heat conduction component through the cooperation of the limiting groove and the guide portion. This disassembly and assembly structure is simple and convenient, which helps to improve the efficiency of the tooling.

[0018] In some embodiments, the heat-conducting component includes a first bottom wall and two first side walls, the two first side walls being connected to both ends of the first bottom wall in a first direction, and the guide portion being disposed at one end of the first side wall away from the first bottom wall in a second direction, the first direction being the width direction of the temperature sampling component, and the second direction being the thickness direction of the temperature sampling component.

[0019] In this embodiment, the heat-conducting component is configured as a first bottom wall and two first side walls. The structure of the heat-conducting component is beneficial for potting the first receiving cavity and also for the molding of the guide portion.

[0020] In some embodiments, the guide portion protrudes in the first direction relative to the first sidewall, the length of the guide portion in the first direction is a first length, the depth of the limiting groove in the first direction is a first depth, and the first length is greater than the first depth.

[0021] In this embodiment, by making the first length of the guide portion greater than the first depth of the limiting groove, an air gap is formed between the heat insulation component and the heat conduction component in the first direction, reducing the contact area between the heat insulation component and the heat conduction component. This reduces the risk of heat on the heat conduction component being directly transferred to the heat insulation component, thereby helping to reduce the interference of heat on the heat conduction component on the temperature detection component and improving the detection accuracy of the temperature detection component.

[0022] In some embodiments, the first sidewall is spaced apart from the inner side of the heat insulation member, and a heat insulation cavity is formed between the first sidewall and the heat insulation member.

[0023] The embodiments of this application, by setting a gap between the first sidewall and the inner side of the heat insulation component, help to reduce the risk of heat from the heat conductor being directly transferred to the heat insulation component, and improve the detection sensitivity and accuracy of the temperature detection component.

[0024] In some embodiments, the heat-conducting element includes a second sidewall and a third sidewall, which are spaced apart in a third direction, the third direction being the length direction of the temperature sampling component. The first sidewall, the second sidewall, the third sidewall, and the first bottom wall together form the first receiving cavity. The second sidewall has a through first opening, which communicates with the first receiving cavity. The temperature detection element is disposed in the first receiving cavity and partially protrudes from the first opening.

[0025] In this embodiment, the heat-conducting component is provided with a second sidewall and a third sidewall that connect to the first sidewall, so that the first sidewall, the second sidewall and the third sidewall together form a first receiving cavity. This helps to improve the sealing performance of the temperature detection component, reduce the risk of moisture entering the first receiving cavity from the outside, and thus improve the reliability of the temperature detection component.

[0026] In some embodiments, the thermal insulation element includes:

[0027] The top is spaced apart from the first bottom wall in the second direction;

[0028] The two ends are connected to the top at both ends in the first direction, and the inner wall of each end forms the limiting groove.

[0029] This embodiment of the application sets the top and the first bottom wall apart in the second direction, and connects them detachably to the heat-conducting component through the limiting groove formed by the end inner wall. When the heat-conducting component and the heat insulation component are connected, the top is used to close the first receiving cavity of the heat-conducting component. The structure is simple and easy to manufacture, which is conducive to improving the production efficiency of the temperature detection component.

[0030] In some embodiments, the thermal insulation element further includes:

[0031] The side portion connects the two ends and the top, and is disposed at one end of the heat-conducting member in a third direction, while the heat-insulating member is open at the other end in the third direction.

[0032] In this embodiment, the heat insulation component has an opening at one end opposite to the side in a third direction. The position of this opening can form a glue-filling channel. In other words, when the heat-conducting component is installed inside the heat insulation component, the heat insulation component closes the first receiving cavity and glue is filled at the opening, which helps to improve assembly efficiency.

[0033] In some embodiments, the end portion has a groove on the side away from the second receiving cavity in the first direction, the groove is provided through in the third direction, and the opening of the groove is formed on the side of the end portion away from the second receiving cavity in the first direction, the groove being detachably connected to the manifold component.

[0034] In some embodiments, the busbar includes a body portion having a mounting groove at one end in a third direction, into which the heat insulation member can be inserted, and a portion of the body portion forming the mounting groove is inserted into the groove at the end.

[0035] In some embodiments, the groove is provided with a first protrusion, which protrudes from the first wall of the groove along a first direction. When the body is inserted into the groove, the body abuts against the first protrusion, and is spaced apart from the first wall of the groove.

[0036] In this embodiment, by providing a first protrusion in the groove, the main body and the first wall are spaced apart in the first direction, which helps to reduce the contact area between the main body and the first wall and increase the air filling between the main body and the first wall, thereby achieving the effect of heat insulation.

[0037] In some embodiments, the end portion includes two second wall surfaces, which are wall surfaces disposed near the groove and opposite each other in the second direction; each of the two second wall surfaces is provided with a second protrusion protruding in the second direction, and when the body portion is inserted into the groove, the two second protrusions abut against the two sides of the body portion in the second direction.

[0038] In this embodiment, the heat insulation component in the housing assembly is inserted into the busbar component through grooves at both ends, and the busbar component is fixed in the second direction by two second protrusions. The clamping structure is designed on the thickness of the busbar component, and the heat insulation component absorbs the vibration of the busbar component, reducing the risk of the clamping stress being transmitted to the temperature acquisition component.

[0039] In some embodiments, the body portion is interference-fitted with the two second protrusions.

[0040] In this embodiment, by interfering with the main body and the two second protrusions, the stress generated by the busbar component is more likely to be concentrated on the heat insulation component, thereby reducing the risk of stress being transmitted to the temperature acquisition component and thus reducing the risk of damage to the temperature acquisition component.

[0041] In some embodiments, the end portion has a guide surface at one end in the third direction, and the guide surface is provided with an arc transition.

[0042] The embodiments of this application feature a ramp guide at the head where the temperature acquisition component and the busbar component interlock, which helps to improve the accuracy of installation, reduce the risk of damage to the temperature acquisition component and the busbar component during assembly, and thus improve assembly efficiency.

[0043] In some embodiments, the temperature sensing element is externally encapsulated with adhesive.

[0044] This application embodiment primarily uses a temperature sampling device to sample the temperature of the wire harness NTC assembly. It utilizes a thermistor ceramic that exhibits different resistance values ​​at different temperatures to convert the temperature signal into an electrical signal. This improves the insulation performance of the temperature sensing device and increases the adhesive encapsulation thickness and waterproofing path.

[0045] In some embodiments, a potting compound is applied between the temperature sensing element and the housing assembly.

[0046] This application also provides an electrical device including a battery device according to any of the above claims, the battery device being used to provide electrical energy.

[0047] In this embodiment, the housing component of the temperature sampling assembly is configured as a detachable heat-conducting component and a heat-insulating component. When the heat-conducting component and the heat-insulating component are connected, the heat-insulating component can seal the first receiving cavity of the heat-conducting component. This reduces the assembly difficulty of the temperature detection component and also helps to improve the sealing performance of the temperature detection component. When the heat-conducting component and the heat-insulating component are detached, the heat-conducting component can be used independently with the temperature detection component, which helps to improve the flexibility of the temperature sampling assembly and adapt to more sampling needs. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the electrical equipment disclosed in the embodiments of this application;

[0050] Figure 2 This is a schematic diagram of the battery device disclosed in the embodiments of this application;

[0051] Figure 3 This is a schematic diagram of the structure of a battery cell and a temperature sampling component in cooperation as disclosed in the embodiments of this application;

[0052] Figure 4 This is a schematic diagram of the structure of the temperature sampling component disclosed in the embodiments of this application;

[0053] Figure 5 This is a top view of the temperature sampling component disclosed in the embodiments of this application;

[0054] Figure 6 This is a side view of the temperature sampling component disclosed in an embodiment of this application;

[0055] Figure 7 yes Figure 6 Sectional view of section AA;

[0056] Figure 8 This is an exploded view of the temperature sampling component disclosed in the embodiments of this application;

[0057] Figure 9 This is a schematic diagram of the structure of the housing assembly disclosed in the embodiments of this application;

[0058] Figure 10 This is a side view of the housing assembly disclosed in the embodiments of this application.

[0059] The accompanying drawings are not drawn to scale.

[0060] Marker explanation:

[0061] 1000, Vehicle; 100, Battery; 200, Controller; 300, Motor; 10, Battery Cell; 211, Support Component; 214, Top Cover; 2, Housing; 3, Busbar Component; 31, Main Body; 310, Mounting Slot; 4, Temperature Sampling Component; 400, First Receiving Cavity; 41, Housing Assembly; 411, Heat Conducting Component; 4111, Guide Component; 4112, First Bottom Wall; 4113, First Side Wall; 4114, Insulation Cavity ; 4115, Second sidewall; 4116, Third sidewall; 4117, First opening; 412, Heat insulation component; 4120, Second receiving cavity; 4121, Limiting groove; 4122, Top; 4123, End; 41231, Guide surface; 4124, Side; 4125, Groove; 4126, First protrusion; 4127, First wall surface; 4128, Second wall surface; 4129, Second protrusion; 42, Temperature detection component. Detailed Implementation

[0062] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0064] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0065] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0067] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", 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 the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0068] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0069] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0070] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0071] With the government's strong promotion of new energy vehicles, they have ushered in a golden opportunity for development. Vehicle safety and stability have always been top concerns. Therefore, improving the safety of new energy vehicles will be one of the key factors determining their rapid popularization. Improving battery safety is a crucial way to enhance the overall safety of new energy vehicles.

[0072] The battery apparatus mentioned in the embodiments of this application refers to a single physical module comprising one or more individual battery cells, or one or more battery cell assemblies, for providing higher voltage and capacity. A battery cell assembly may include multiple individual battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0073] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, where multiple battery cells are arranged and fixed together to form an independent battery module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0074] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0075] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0076] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0077] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house individual battery cells or battery module assemblies. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0078] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house individual battery cells or battery module assemblies.

[0079] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0080] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0081] A single battery cell may include an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated positive current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated negative current collector, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0082] For example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0083] For example, the positive electrode current collector can be a metal foil or a composite current collector. For instance, the metal foil can be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. The composite current collector may include a polymer substrate and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0084] For example, the negative electrode can be a negative electrode sheet, which may include a negative electrode current collector.

[0085] For example, the negative electrode current collector can be a metal foil or a composite current collector. For instance, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc.

[0086] For example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0087] Exemplarily, the negative electrode active material may be any negative electrode active material known in the art for use in batteries. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0088] A battery cell also includes an insulating film and a casing. The insulating film covers the outside of the electrode assembly, and the casing encapsulates the electrode assembly covered with the insulating film to form the battery cell. The insulating film can be a Mylar film, and the casing can be an aluminum casing or a steel casing. After the electrode assembly is wound and formed, the Mylar film and casing are encapsulated through a Mylar film wrapping process and a casing insertion process. The Mylar film serves to seal and protect the electrode assembly, and it effectively insulates the electrode assembly and casing from each other, preventing internal short circuits within the battery cell. The casing provides protection.

[0089] Exemplarily, the housing includes a top cover and an outer shell, the outer shell having an opening, and the top cover closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The outer shell may have one or more openings. The top cover may also have one or more openings.

[0090] For example, the housing is provided with at least one electrode terminal, which is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal can be located on the top cover or on the outer casing.

[0091] For example, a pressure relief component is provided on the housing. The pressure relief component is used to release the internal pressure of the battery cell. It should be noted that the pressure relief component can be an explosion-proof valve or a pressure relief port, etc.

[0092] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, the safety and reliability of the battery also need to be considered.

[0093] In existing technologies, to ensure the safety of individual battery cells, a temperature sampling component is typically installed within the battery assembly. This component collects and monitors the temperature of the individual battery cells during use, providing information about the battery's operational status. The temperature sampling component usually includes a temperature sensor and a mounting bracket for mounting the sensor. The bracket is typically installed on the battery's busbar and is in contact with the individual battery cells, allowing the temperature sensor housed within the bracket to detect the cell temperature. However, in this configuration, the temperature from the busbar is also transmitted to the temperature sensor via the mounting bracket during use, leading to inaccurate temperature readings from the sensor. This results in an inability to effectively assess the operational status of the individual battery cells, hindering improvements in battery stability and reliability.

[0094] This application provides a battery device including a housing, battery cells, a current collector, and a temperature sampling assembly. The battery cells are disposed within the housing. The current collector electrically connects multiple battery cells. The temperature sampling assembly includes a housing assembly and a temperature sensor. The temperature sensor is configured to detect the temperature of the battery cells. The housing assembly covers the outside of the temperature sensor and includes a heat-conducting element and a heat-insulating element. The heat-conducting element forms an open first receiving cavity, within which the temperature sensor is disposed. The heat-insulating element is detachably connected to the heat-conducting element to partially close the first receiving cavity. This application provides a battery device by configuring the housing assembly of the temperature sampling assembly with detachable heat-conducting and heat-insulating elements. When the heat-conducting and heat-insulating elements are connected, the heat-insulating element can close the first receiving cavity of the heat-conducting element. This reduces the assembly difficulty of the temperature sensor and improves its sealing performance. When the heat-conducting and heat-insulating elements are detached, the heat-conducting element can be used independently of the temperature sensor, increasing the flexibility of the temperature sampling assembly to meet more sampling needs.

[0095] The technical solutions described in the embodiments of this application are applicable to electrical devices that use batteries. The electrical devices include batteries from any embodiment of this application, and the batteries are used to provide electrical energy.

[0096] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0097] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0098] Please refer to Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0099] This application provides a battery device, such as... Figure 3 and Figure 4 As shown, the battery device includes a housing, a battery cell 10, a busbar component 3, and a temperature sampling component 4.

[0100] like Figure 2 and Figure 3As shown, to meet different power demands, the battery device 100 may include multiple battery cells 10, where each battery cell 10 is the smallest unit that makes up a battery module or battery device 100. Multiple battery cells 10 can be connected in series, parallel, or in a hybrid configuration, where some cells are connected in series and others in parallel. Multiple battery cells 10 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery cells 10 is housed within a casing. Alternatively, the battery device 100 can also consist of multiple battery cells 10 first connected in series, parallel, or in a hybrid configuration to form a battery module, and then these modules are connected in series, parallel, or in a hybrid configuration to form a whole, which is then housed within a casing. The battery device 100 may also include other structures; for example, it may include a current-connecting component 3, which is used to achieve electrical connection between the multiple battery cells 10. Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0101] The enclosure can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple three-dimensional structures such as cuboids, cylinders, or spheres. The enclosure material can be alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0102] The enclosure is used to house individual battery cells or battery modules, and can have various structures. See some embodiments. Figure 2 The housing may include a top cover 214 and a support member 211, which are fitted together to define an installation space for accommodating the battery cell 10. The support member 211 may be a hollow structure open at one end, and the top cover 214 may be a plate-like structure, fitting over the open side of the support member 211 to form a housing with installation space. Alternatively, both the top cover 214 and the support member 211 may be hollow structures open on one side, with the open side of the top cover 214 fitting over the open side of the support member 211 to form a housing with installation space. Of course, the top cover 214 and the support member 211 can be of various shapes, such as cylinders or cuboids.

[0103] To improve the sealing performance after the top cover 214 is connected to the carrier 211, a sealing element, such as sealant or sealing ring, can also be provided between the top cover 214 and the carrier 211.

[0104] Assuming that the upper cover 214 covers the top of the support member 211, the upper cover 214 can also be called the upper box cover, and the support member 211 can also be called the lower box cover.

[0105] To ensure the safety of individual battery cells, a temperature sampling component 4 is typically installed within the battery assembly. This component collects and monitors the temperature of the individual battery cells 10 during use, providing information on the battery's operational status. The temperature sampling component usually includes a temperature sensor and a mounting bracket for mounting the sensor. The bracket is typically mounted on the battery's busbar and is in contact with the individual battery cells, allowing the temperature sensor housed within the bracket to detect the cell temperature. However, in this configuration, the temperature from the busbar is also transmitted to the temperature sensor via the mounting bracket during use, leading to inaccurate temperature readings from the sensor. This results in an inability to effectively assess the operational status of the individual battery cells, hindering the improvement of battery stability and reliability.

[0106] like Figures 4-8 As shown, the temperature sampling component 4 includes a housing assembly 41 and a temperature sensing element 42. The temperature sensing element 42 is configured to detect the temperature of a single battery cell, and the housing assembly 41 covers the outside of the temperature sensing element. It should be noted that "covering" means that the housing assembly 41 is located outside the temperature sensing element 42, which isolates the temperature sensing element 42 from external moisture. The housing assembly 41 can protect the temperature sensing element 42 and improve the reliability of the temperature sensing element 42.

[0107] Among them, such as Figure 8 As shown, the housing assembly 41 includes a heat-conducting element 411 and a heat-insulating element 412. The heat-conducting element 411 forms an open first receiving cavity 400. "Open" means that at least one end of the first receiving cavity 400 is open, allowing the first receiving cavity 400 to communicate with the outside, so as to facilitate the placement of the temperature sensing element 42 within the first receiving cavity 400. Furthermore, the open area of ​​the first receiving cavity 400 can be used as a channel for potting adhesive.

[0108] A temperature sensing element 42 is disposed within the first receiving cavity 400. A heat insulation element 412 and a heat-conducting element 411 are detachably connected to partially close the first receiving cavity 400. It should be noted that "detachable" means that the heat insulation element 412 and the heat-conducting element 411 have a connection and disassembly relationship. When the heat insulation element 412 and the heat-conducting element 411 are connected, the heat insulation element 412 closes the first receiving cavity 400 of the heat-conducting element 411. When the heat insulation element 412 and the heat-conducting element 411 are disassembled, the heat insulation element 412 opens the first receiving cavity 400 of the heat-conducting element 411.

[0109] In this embodiment, the heat insulation component 412 and the heat conduction component 411 are detachably configured, which facilitates the individual processing and manufacturing of the heat insulation component 412 and the heat conduction component 411. Furthermore, the heat insulation component 412 and the heat conduction component 411 can be used independently. For example, the heat conduction component 411 can be used to separately mount a temperature sensing element, forming an independent temperature sampling assembly for individual temperature sampling. In embodiments where the heat conduction component 411 and the temperature sensing element 412 are used independently, this is advantageous for scenarios with limited assembly space. This temperature sampling assembly offers high flexibility in use, helping to meet diverse sampling needs.

[0110] This application provides a battery device including a housing, battery cells, a current collector, and a temperature sampling assembly. The battery cells are disposed within the housing. The current collector electrically connects multiple battery cells. The temperature sampling assembly includes a housing assembly and a temperature sensor. The temperature sensor is configured to detect the temperature of the battery cells. The housing assembly covers the outside of the temperature sensor and includes a heat-conducting element and a heat-insulating element. The heat-conducting element forms an open first receiving cavity, within which the temperature sensor is disposed. The heat-insulating element is detachably connected to the heat-conducting element to partially close the first receiving cavity. This application provides a battery device by configuring the housing assembly of the temperature sampling assembly with detachable heat-conducting and heat-insulating elements. When the heat-conducting and heat-insulating elements are connected, the heat-insulating element can close the first receiving cavity of the heat-conducting element. This reduces the assembly difficulty of the temperature sensor and improves its sealing performance. When the heat-conducting and heat-insulating elements are detached, the heat-conducting element can be used independently of the temperature sensor, increasing the flexibility of the temperature sampling assembly to meet more sampling needs.

[0111] In some embodiments, such as Figure 4 As shown in Figure 411, the thermal conductivity of the heat-conducting component 411 is higher than that of the heat-insulating component 412. In other words, as illustrated in Figure 412, the heat generated by the battery cell 10 is conducted as much as possible from the heat-conducting component 411 (with higher thermal conductivity) to the temperature detection component 42, while the heat is conducted as little as possible from the heat-insulating component 412 (with lower thermal conductivity) to the temperature detection component 42. This reduces the risk of heat from other components being conducted to the temperature detection component 42, thereby reducing interference from the temperature detection component on the battery cell temperature and improving the sensitivity of the temperature detection component for battery cell temperature. Furthermore, having a lower thermal conductivity for the heat-insulating component than for the heat-conducting component facilitates the direct transfer of heat from the battery cell to the temperature detection component. It also helps mitigate the risk of heat transfer from the busbar component to the heat-insulating component, thus reducing the impact of the busbar component temperature on the temperature detection component. This improves the accuracy and precision of the temperature detection component in detecting the battery cell temperature, enabling the temperature sampling component to more effectively obtain information about the battery cell's internal condition, thereby improving the battery's operational stability and reliability.

[0112] In some embodiments, such as Figure 4 As shown, the heat-conducting component 411 is a metal component, and the heat-insulating component 412 is a non-metallic component. That is, during the processing of the housing assembly, the metal component can be punched to create a groove, forming a first receiving cavity for accommodating the temperature sensing component. Adhesive and sampling lines can then be encapsulated within this first receiving cavity. This reduces the complexity of the molding process, thereby lowering processing costs. In this embodiment, the metal component is positioned on the heat-conducting surface of the temperature sampling component. By using metal for the heat-conducting surface, a faster temperature conduction speed is provided for the temperature sensing component.

[0113] It should be noted that the heat insulation component 412 in this embodiment can be made of plastic particles with a thermal conductivity of less than 0.1. This embodiment employs a detachable, nested temperature sampling housing assembly structure. Based on different application requirements, it enables the independent use of a single-metal housing temperature sampling structure, and also allows for the application of a nested temperature sampling structure in conjunction with a non-metallic plug-in structure. The metal component can be fixed externally with adhesive to achieve heat conduction and adhesion to the temperature sampling surface of the busbar component. The non-metallic heat insulation component has a low thermal conductivity, which helps to isolate the temperature influence of non-temperature sampling surfaces, thereby improving the detection accuracy of the temperature sensing component.

[0114] In some embodiments, such as Figures 8-10 As shown, the heat insulation member 412 has a recessed interior forming a second receiving cavity 4120, and the heat conducting member 411 is detachably disposed within the second receiving cavity 4120 to at least partially close the first receiving cavity 400.

[0115] It should be noted that the embodiments of this application do not limit the molding method of the heat insulation component 412. The molding method includes, but is not limited to, stamping and injection molding, as long as the second receiving cavity 4120 in the heat insulation component 412 can be formed.

[0116] In this embodiment, a second receiving cavity is formed by recessing the heat insulation component, allowing the heat-conducting component to be detachably disposed within the second receiving cavity to seal the first receiving cavity. This extends the conduction path from the first receiving cavity to the outside of the housing assembly, thus extending the path for water vapor conduction and improving the sealing performance of the housing assembly.

[0117] In some embodiments, such as Figure 9As shown, the heat insulation member 412 is provided with a limiting groove 4121, which is located on the side of the heat insulation member 412 near the second receiving cavity 4120. It should be noted that the heat insulation member 4121 has two opposing sides, namely the inner side and the outer side of the heat insulation member 4121. The inner side of the heat insulation member 4121 refers to the side of the heat insulation member 4121 closest to the second receiving cavity 4120, and the outer side of the heat insulation member 4121 refers to the side of the heat insulation member 4121 furthest from the second receiving cavity 4120 compared to the inner side. In this embodiment, the heat insulation member 412 has a limiting groove 4121 on its inner side, and the heat-conducting member 411 has a guide portion 4111, which can be adapted to fit within the limiting groove 4121.

[0118] In this embodiment, the heat insulation component and the heat conduction component are detachably connected through the cooperation of the limiting groove 4121 and the guide part 4111. This disassembly and assembly structure is simple and convenient, which helps to improve the efficiency of the tooling.

[0119] In some embodiments, the limiting groove can be provided on the heat-conducting component and the guide portion can be provided on the heat-insulating component, as long as the heat-conducting component and the heat-insulating component can be detachably coupled.

[0120] In some embodiments, such as Figure 9 and Figure 10 As shown, the heat-conducting component 411 includes a first bottom wall 4112 and two first side walls 4113. The two first side walls 4113 are connected to the first bottom wall 4112 in a first direction (refer to...). Figure 9 The two ends of the first sidewall 4113 in the X direction (as shown) in this embodiment are spaced apart in the first direction, and one end of the first sidewall 4113 is connected to the first bottom wall 4112. The first sidewall 4113 is approximately along the second direction (refer to the second direction). Figure 10 Extending in the Z direction (as shown), a guide portion 4111 is disposed at one end of the first sidewall 4113 away from the first bottom wall 4112 in the second direction. The first direction is the width direction of the temperature sampling component 4, and the second direction is the thickness direction of the temperature sampling component 4. The guide portion 411 protrudes relative to the first sidewall 4113 in the first direction.

[0121] In this embodiment, the heat-conducting component is configured as a first bottom wall and two first side walls. The structure of the heat-conducting component is beneficial for potting the first receiving cavity and also for the molding of the guide portion.

[0122] In some embodiments, such as Figure 10 As shown, the guide portion 4111 is relative to the first sidewall 4113 in the first direction (refer to...) Figure 10The guide portion 4111 is protruding in the X direction (as shown). The length of the guide portion 4111 in the first direction is a first length L1, and the depth of the limiting groove 4121 in the first direction is a first depth L2. The first length is greater than the first depth. That is, when the guide portion 4111 is assembled into the limiting groove 4121, part of the guide portion 4111 extends into the limiting groove 4121, and the other part of the guide portion 4111 is located outside the limiting groove 4121. This results in the surface of the first sidewall being spaced apart from the inner wall surface of the heat insulation component, and an air gap being formed between the first sidewall and the inner wall surface of the heat insulation component.

[0123] In this embodiment, by making the first length of the guide portion greater than the first depth of the limiting groove, an air gap is formed between the heat insulation component and the heat conduction component in the first direction, reducing the contact area between the heat insulation component and the heat conduction component. This reduces the risk of heat on the heat conduction component being directly transferred to the heat insulation component, thereby helping to reduce the interference of heat on the heat conduction component on the temperature detection component and improving the detection accuracy of the temperature detection component.

[0124] In some embodiments, such as Figure 10 As shown, the first sidewall 4113 is spaced apart from the inner side of the heat insulation member 412, and a heat insulation cavity 4114 is formed between the first sidewall 4113 and the heat insulation member 412.

[0125] It should be noted that the interval refers to the air gap formed between the first sidewall 4113 and the inner side of the heat insulation member 412, and the interval between the first sidewall 4113 and the inner side of the heat insulation member 412 is a non-solid component.

[0126] The embodiments of this application, by setting a gap between the first sidewall and the inner side of the heat insulation component, help to reduce the risk of heat from the heat conductor being directly transferred to the heat insulation component, and improve the detection sensitivity and accuracy of the temperature detection component.

[0127] In some embodiments, such as Figure 9 and Figure 10 As shown, the heat-conducting component 411 includes a second sidewall 4115 and a third sidewall 4116, the second sidewall 4115 and the third sidewall 4116 in a third direction (refer to...) Figure 9 The temperature sampling component 4 is arranged at intervals in the Y direction (as shown), with the third direction being the length direction of the component. The first sidewall 4113, the second sidewall 4115, the third sidewall 4116, and the first bottom wall 4112 together form the first receiving cavity 400. The second sidewall 4115 has a through opening 4117. It should be noted that "through" means that the first opening 4117 passes through the second sidewall 4115 on opposite sides in the third direction, so that the first opening 4117 connects to the first receiving cavity 400. Figure 7 As shown, the temperature sensing element 4 is disposed in the first receiving cavity 400, and a portion of the temperature sensing element 4 protrudes from the first opening 4117.

[0128] In this embodiment, the heat-conducting component is provided with a second sidewall and a third sidewall that connect to the first sidewall, so that the first sidewall, the second sidewall and the third sidewall together form a first receiving cavity. This helps to improve the sealing performance of the temperature detection component, reduce the risk of moisture entering the first receiving cavity from the outside, and thus improve the reliability of the temperature detection component.

[0129] In some embodiments, such as Figure 10 As shown, the heat insulation member 412 includes a top 4122 and two ends 4123. The top 4122 and the first bottom wall 4112 are in the second direction (see reference). Figure 10 The two ends 4123 are spaced apart in the Z direction; the top 4122 is connected to the two ends of the first direction at both ends, and the inner wall of each end 4123 forms the limiting groove 4121.

[0130] This embodiment of the application sets the top and the first bottom wall apart in the second direction, and connects them detachably to the heat-conducting component through the limiting groove formed by the end inner wall. When the heat-conducting component and the heat insulation component are connected, the top is used to close the first receiving cavity of the heat-conducting component. The structure is simple and easy to manufacture, which is conducive to improving the production efficiency of the temperature detection component.

[0131] In some embodiments, combined with Figure 7 and Figure 8 As shown, the heat insulation member 412 also includes a side portion 4124, which connects the two ends 4123 and the top 4122. The side portion 4124 is disposed on the heat conductor 411 in a third direction (see reference). Figure 7 At one end (shown in the Y direction), the heat insulation element 412 is provided with an opening at the other end in the third direction.

[0132] In this embodiment, the heat insulation component has an opening at one end opposite to the side in a third direction. The position of this opening can form a glue-filling channel. In other words, when the heat-conducting component is installed inside the heat insulation component, the heat insulation component closes the first receiving cavity and glue is filled at the opening, which helps to improve assembly efficiency.

[0133] In some embodiments, combined with Figure 9 and Figure 10 As shown, end portion 4123 in the first direction (refer to) Figure 9 A groove 4125 is provided on the side away from the second receiving cavity 4120 in the X direction (as shown), and the groove 4125 is in the third direction (refer to) Figure 9 The groove 4125 is provided through in the Y direction, and the opening of the groove 4125 is formed on the side of the end away from the second receiving cavity 4120 in the first direction, combined with... Figure 3 As shown, the groove 4125 is detachably connected to the busbar component 3.

[0134] In this embodiment, a groove is provided at the end, which is through in the third direction. The temperature sampling component can slide relative to the busbar in the third direction, so as to realize the connection and detachment of the temperature sampling component and the busbar in the third direction, which is beneficial to improve the assembly efficiency of the temperature sampling component and the busbar.

[0135] In other embodiments, the groove may be provided on the busbar component, and the connection and detachment are achieved by the temperature sampling component engaging with the groove on the busbar component.

[0136] In some embodiments, such as Figure 3 and Figure 4 As shown, the busbar component 3 includes a body part 31. The body part 31 has a mounting groove 310 at one end in a third direction. The heat insulation member 412 can be inserted into the mounting groove 310. The part of the body part 31 that forms the mounting groove 310 is inserted into the groove 4125 of the end 4123.

[0137] The embodiments of this application improve the ease of connection between the temperature sampling component and the busbar by using a mounting slot to limit the connection between the main body and the temperature sampling component, thereby improving the installation efficiency of the temperature sampling component. Furthermore, it enables the temperature sampling component to be disassembled and assembled relative to the busbar, thereby improving the maintainability of the temperature sampling component.

[0138] In some embodiments, such as Figure 10 As shown, a first protrusion 4126 is provided in the groove 4125, and the first protrusion 4126 extends from the first wall surface 4127 of the groove 4125 along a first direction (refer to...). Figure 10 The X-direction protrusion is shown, combined with Figure 3 As shown, when the main body 31 is inserted into the groove 4125, the main body 31 abuts against the first protrusion 4126 and is spaced apart from the first wall surface 4127 of the groove 4125.

[0139] In other words, when the temperature sampling component 4 is connected to the manifold 3, the body part 31 of the manifold 3 is inserted into the groove 4125 of the temperature sampling component 4, so that the body part 31 abuts against the first protrusion 4126 in the first direction, so that the body part 31 is spaced apart from the first wall surface 4127 in the first direction.

[0140] In this embodiment, by providing a first protrusion in the groove, the main body and the first wall are spaced apart in the first direction, which helps to reduce the contact area between the main body and the first wall and increase the air filling between the main body and the first wall, thereby achieving the effect of heat insulation.

[0141] In some embodiments, combined with Figure 3 and Figure 4As shown, the end portion 4123 includes two second wall surfaces 4128, which are wall surfaces of the end portion 4123 that are close to the groove 4125 and are opposite to each other in the second direction; both second wall surfaces 4128 are provided with second protrusions 4129 that protrude along the second direction. When the body portion 31 is inserted into the groove 4125, the two second protrusions 4129 abut against the two sides of the body portion 31 in the second direction.

[0142] In this embodiment, the heat insulation component in the housing assembly is inserted into the busbar component through grooves at both ends, and the busbar component is fixed in the second direction by two second protrusions. The clamping structure is designed on the thickness of the busbar component, and the heat insulation component absorbs the vibration of the busbar component, reducing the risk of the clamping stress being transmitted to the temperature acquisition component.

[0143] In some embodiments, combined with Figure 3 and Figure 4 As shown, the main body 31 is interference-fitted with the two second protrusions 4129.

[0144] It should be noted that an interference fit means that the gap between the two second protrusions 4129 in the second direction is less than the thickness of the busbar component 3. The difference between the gap between the two second protrusions 4129 in the second direction and the thickness of the busbar component 3 is defined as the interference amount. In the embodiments of this application, the interference amount can be set to be greater than or equal to 0.1 mm and less than or equal to 0.2 mm. In some embodiments, the interference amount can be set to 0.15 mm.

[0145] In this embodiment, by interfering with the main body and the two second protrusions, the stress generated by the busbar component is more likely to be concentrated on the heat insulation component, thereby reducing the risk of stress being transmitted to the temperature acquisition component and thus reducing the risk of damage to the temperature acquisition component.

[0146] In some embodiments, such as Figure 4 As shown, end 4123 has a guide surface (not shown in the figure) at one end in the third direction, and the guide surface is set with an arc transition. That is to say, the guide surface is smoothly connected to the second wall surface, and the guide surface has an arc structure.

[0147] The embodiments of this application feature a ramp guide at the head where the temperature acquisition component and the busbar component interlock, which helps to improve the accuracy of installation, reduce the risk of damage to the temperature acquisition component and the busbar component during assembly, and thus improve assembly efficiency.

[0148] In some embodiments, the temperature sensing element is externally encapsulated with adhesive. In some embodiments, the temperature sampling element is configured as a single-ended lead temperature sampling element, which can be an epoxy NTC (Negative Temperature Coefficient) or a glass-encapsulated NTC. Epoxy NTC refers to a negative temperature coefficient thermistor whose surface is encapsulated with epoxy adhesive, while glass-encapsulated NTC refers to a negative temperature coefficient thermistor whose surface is encapsulated with glass contacts. Both epoxy NTC and glass-encapsulated NTC consist of a contact-encapsulated thermistor and signal transmission leads. The temperature sampling element mainly realizes temperature sampling of the wire harness NTC assembly, utilizing the thermistor that exhibits different resistance values ​​at different temperatures to convert the temperature signal into an electrical signal. This is beneficial for improving the insulation performance of the temperature sensing element, increasing the adhesive encapsulation thickness, and expanding the waterproof path.

[0149] In some embodiments, potting compound is applied between the temperature sensing element and the housing assembly.

[0150] In some embodiments, the temperature sensing element is sealed with an epoxy-based sealant. Epoxy sealants have a lower water absorption rate, which, compared to UV sealants, more effectively prevents short circuits caused by moisture intrusion. The sealant also secures the single-ended NTC lead within the housing, ensuring the fixation and connection of all components of the wire harness NTC assembly. Structurally, the sealant encapsulates the NTC and wires within the housing, employing a multi-layer encapsulation process to achieve uniform sealant thickness for the temperature sensing element and ensure its centered position within the housing assembly. This maintains sufficient distance between the temperature sensing element and the housing assembly, further enhancing insulation and protection. The sealant also encapsulates the insulation of the temperature sensing element's wires, increasing the path for moisture intrusion and preventing long-term reliability failures.

[0151] In some embodiments, the process first involves using encapsulating adhesive to cover the single-ended lead temperature sampling component, the welding position between the conductor core and the temperature sampling component, and a partial area of ​​the conductor sheath, and then encapsulating it in a housing assembly using potting adhesive. This ultimately forms a nested NTC sampling structure with an adhesive-coated protruding structure.

[0152] This application also provides an electrical device including a battery device according to any of the above embodiments, the battery device being used to provide electrical energy. The battery device includes a housing, individual battery cells, a current collector, and a temperature sampling assembly. The individual battery cells are disposed within the housing. The current collector electrically connects multiple individual battery cells. The temperature sampling assembly includes a housing assembly and a temperature sensing element. The temperature sensing element is configured to detect the temperature of the individual battery cells. The housing assembly covers the outside of the temperature sensing element and includes a heat-conducting element and a heat-insulating element. An open first receiving cavity is formed inside the heat-conducting element. The temperature sensing element is disposed within the first receiving cavity. The heat-insulating element is detachably connected to the heat-conducting element to partially close the first receiving cavity. In this embodiment, the housing component of the temperature sampling assembly is configured as a detachable heat-conducting component and a heat-insulating component. When the heat-conducting component and the heat-insulating component are connected, the heat-insulating component can seal the first receiving cavity of the heat-conducting component. This reduces the assembly difficulty of the temperature detection component and also helps to improve the sealing performance of the temperature detection component. When the heat-conducting component and the heat-insulating component are detached, the heat-conducting component can be used independently with the temperature detection component, which helps to improve the flexibility of the temperature sampling assembly and adapt to more sampling needs.

[0153] In addition to the embodiments of the claims above, specific embodiments involving more specific features or combinations thereof may be preferred and may be as shown in the accompanying drawings.

[0154] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; The battery cell is housed inside the casing; A busbar component, wherein the busbar component is electrically connected to a plurality of the battery cells; A temperature sampling assembly includes a housing assembly and a temperature detection element, the temperature detection element being configured to detect the temperature of the battery cell, the housing assembly covering the outside of the temperature detection element; wherein, the housing assembly includes a thermally conductive element and a thermally insulating element, the thermally conductive element forming an open first receiving cavity, the temperature detection element being disposed within the first receiving cavity, and the thermally insulating element being detachably connected to the thermally conductive element to partially close the first receiving cavity.

2. The battery device according to claim 1, characterized in that, The thermal conductivity of the heat-conducting component is higher than that of the heat-insulating component.

3. The battery device according to claim 2, characterized in that, The heat-conducting component is made of metal, and the heat-insulating component is made of non-metal.

4. The battery device according to claim 1, characterized in that, The heat insulation component has an internal recess to form a second receiving cavity, and the heat-conducting component is detachably disposed in the second receiving cavity to at least partially close the first receiving cavity.

5. The battery device according to claim 4, characterized in that, The heat insulation component is provided with a limiting groove, which is located on the side of the heat insulation component near the second receiving cavity. The heat conducting component is provided with a guide portion, which can be adapted to the limiting groove.

6. The battery device according to claim 5, characterized in that, The heat-conducting component includes a first bottom wall and two first side walls. The two first side walls are connected to the two ends of the first bottom wall in a first direction. The guide portion is disposed at the end of the first side wall away from the first bottom wall in a second direction. The first direction is the width direction of the temperature sampling component, and the second direction is the thickness direction of the temperature sampling component.

7. The battery device according to claim 6, characterized in that, The guide portion protrudes in the first direction relative to the first sidewall, the length of the guide portion in the first direction is a first length, the depth of the limiting groove in the first direction is a first depth, and the first length is greater than the first depth.

8. The battery device according to claim 7, characterized in that, The first sidewall is spaced apart from the inner side of the heat insulation member, and a heat insulation cavity is formed between the first sidewall and the heat insulation member.

9. The battery device according to claim 6, characterized in that, The heat-conducting component includes a second sidewall and a third sidewall, which are spaced apart in a third direction, the third direction being the length direction of the temperature sampling component. The first sidewall, the second sidewall, the third sidewall, and the first bottom wall together form the first receiving cavity. The second sidewall has a through first opening, which communicates with the first receiving cavity. The temperature detection component is disposed in the first receiving cavity and partially protrudes from the first opening.

10. The battery device according to any one of claims 6-9, characterized in that, The heat insulation component includes: The top is spaced apart from the first bottom wall in the second direction; The two ends are connected to the top at both ends in the first direction, and the inner wall of each end forms the limiting groove.

11. The battery device according to claim 10, characterized in that, The heat insulation component also includes: The side portion connects the two ends and the top, and is disposed at one end of the heat-conducting member in a third direction, while the heat-insulating member is open at the other end in the third direction.

12. The battery device according to claim 10, characterized in that, The end portion has a groove on the side away from the second receiving cavity in the first direction, the groove is provided through in the third direction, and the opening of the groove is formed on the side of the end portion away from the second receiving cavity in the first direction, the groove is detachably connected to the manifold component.

13. The battery device according to claim 12, characterized in that, The busbar component includes a body portion, which has a mounting groove at one end in a third direction. The heat insulation component can be inserted into the mounting groove, and a portion of the body portion forming the mounting groove is inserted into the groove at the end.

14. The battery device according to claim 13, characterized in that, The groove is provided with a first protrusion, which protrudes from the first wall of the groove along a first direction. When the main body is inserted into the groove, the main body abuts against the first protrusion, and is spaced apart from the first wall of the groove.

15. The battery device according to claim 13, characterized in that, The end portion includes two second wall surfaces, which are wall surfaces located near the groove and opposite each other in the second direction. Each of the two second wall surfaces is provided with a second protrusion that protrudes along the second direction. When the main body portion is inserted into the groove, the two second protrusions abut against the two sides of the main body portion in the second direction.

16. The battery device according to claim 15, characterized in that, The main body portion is interference-fitted with the two second protrusions.

17. The battery device according to claim 13, characterized in that, The end portion has a guide surface at one end in the third direction, and the guide surface is provided with a rounded transition.

18. The battery device according to any one of claims 1-17, characterized in that, The temperature sensing element is encapsulated with adhesive.

19. The battery device according to claim 18, characterized in that, The temperature sensing element is sealed with potting compound between itself and the housing assembly.

20. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-19, the battery device being used to provide electrical energy.

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