Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and the battery device comprises a box body which is internally provided with an installation space; a battery cell, wherein the battery cell is arranged in the installation space; 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, and the temperature detection piece is configured to detect the temperature of the battery monomers; the shell assembly covers the outer side of the temperature detection piece; wherein the shell assembly comprises an insert and an injection molding part; the injection molding part at least partially coats the outer side of the insert in an injection molding manner so as to form a containing cavity together with the insert; the temperature detection part is arranged in the containing cavity, and the heat conductivity coefficient of the insert is higher than that of the injection molding part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric equipment. BACKGROUND

[0002] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Among them, the battery as a core component of new energy vehicles has higher requirements in terms of use stability and use reliability.

[0003] In the battery technology, in order to ensure the safety of the battery monomer, a temperature sampling component is generally arranged in the battery. The temperature sampling component can collect and monitor the temperature of the battery monomer in the use process, so as to obtain the use condition of the battery. However, the temperature sampling component in the existing battery is prone to inaccurate temperature collection in the use process, so that the use condition of the battery monomer inside the battery cannot be effectively obtained, which is not conducive to improving the use stability and reliability of the battery. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a battery device and an electric equipment to solve the technical problem of how to improve the reliability of the use of battery monomers.

[0005] The embodiments of the present application provide a battery device, which comprises:

[0006] A box body, wherein an installation space is arranged inside the box body;

[0007] A battery monomer, wherein the battery monomer is arranged in the installation space;

[0008] A current collecting component, wherein the current collecting component is electrically connected to a plurality of battery monomers;

[0009] A temperature sampling component, wherein the temperature sampling component comprises a shell assembly and a temperature detection piece, the temperature detection piece is configured to detect the temperature of the battery monomer, the shell assembly is wrapped outside the temperature detection piece, the shell assembly comprises an insert and an injection molding piece, the injection molding piece is at least partially injection molded and wrapped outside the insert to form a containing cavity together with the insert, the temperature detection piece is arranged in the containing cavity, and the thermal conductivity of the insert is higher than that of the injection molding piece.

[0010] The shell assembly is set as an injection molding part which at least injection molding covers the outside of the insert to jointly form the containing cavity, which is beneficial to improve the sealing performance of the shell assembly, reduce the risk of water vapor intrusion, improve the long-term reliability of the temperature detection part working in the containing cavity, and also play a heat preservation effect to reduce the risk of heat dissipation in the containing cavity. The thermal conductivity of the insert is higher than that of the injection molding part, which is beneficial to the heat of the battery monomer being directly transmitted to the temperature detection part through the insert, and also beneficial to alleviate the risk of temperature transfer from the busbar component to the injection molding part, thereby reducing the influence of the temperature on the busbar component on the temperature detection part, improving the precision and accuracy of the temperature detection part detecting the temperature of the battery monomer, and thus the temperature sampling assembly can more effectively obtain the use condition of the battery monomer inside the battery device, to improve the use stability and reliability of the battery device.

[0011] In some embodiments, the insert is a metal part, and the injection molding part is a non-metal part.

[0012] The insert is set as a metal part, and the injection molding part is set as a non-metal part, and the insert injection molding process is adopted, which can realize reliable connection of metal and non-metal structures, and meet the function that the thermal conductivity of the insert 411 is higher than that of the injection molding part, improve the detection reliability of the temperature detection part, and reduce the processing difficulty of the shell assembly.

[0013] In some embodiments, the insert includes a first structure and a second structure, the first structure and the second structure are integrally formed, the first structure is a planar structure, the second structure is connected to the edge of the first structure, and the injection molding part is covered on the outside of the second structure to jointly enclose the containing cavity with the first structure.

[0014] The insert is set as two parts of the first structure and the second structure, the injection molding part is covered on the outside of the second structure, the reliable connection between the injection molding part and the insert is realized, and the containing cavity is enclosed between the injection molding part and the first structure, which can be used to contain the temperature detection part, so that the heat of the battery monomer is beneficial to be transmitted to the temperature detection part through the first structure, and the heat transmission of the second structure is reduced, which is beneficial to improve the detection reliability of the temperature detection part.

[0015] In some embodiments, the insert includes two second structures, the two second structures are connected to both ends of the first structure in a first direction, and the first direction is the width direction of the temperature sampling assembly.

[0016] The second structure is provided as two, and the injection molding part can be over-molded with the two second structures in the injection molding process, thereby improving the stability of the connection between the injection molding part and the insert and improving the sealing performance of the shell assembly.

[0017] In some embodiments, the second structure includes a first extension part and a first flange part, the first extension part is connected to the first structure at one end in a second direction, the second direction is the thickness direction of the temperature sampling assembly; one end of the first flange part is connected to the first extension part, and the other end of the first flange part is offset in the first direction away from the accommodating cavity, and the injection molding part is wrapped on both sides of the first flange part in the first direction.

[0018] In the embodiments of the present application, the second structure is provided as a first extension part and a first flange part, one end of the first extension part is connected to the first structure, one end of the first flange part is connected to the first extension part, and the other end of the first flange part is offset in the first direction away from the accommodating cavity. In the injection molding process, the injection molding part can be wrapped on both sides of the first flange part in the first direction. Compared with the case where the injection molding part is wrapped on one side of the first flange part, the area of the combination of the injection molding part and the first flange part is increased, the strength of the combination of the injection molding part and the first flange part is improved, and thus the structural strength and sealing performance of the entire shell assembly are improved.

[0019] In some embodiments, the first extension part has a frame structure, and a hollow through hole is formed in the inner edge of the first extension part, and one end of the first flange part is connected to the inner edge of the first extension part.

[0020] In the embodiments of the present application, the first extension part and the first flange part are processed by stamping forming, which is beneficial to improving the processing efficiency of the second structure.

[0021] In some embodiments, the angle of the first flange part relative to the inclination of the first extension part is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0022] In the embodiments of the present application, the angle of the first flange part relative to the first extension part is set within a certain range, which can ensure that the amount of the injection molding part on both sides of the first flange part is sufficient to achieve the heat insulation effect, and can also reduce the risk of stress concentration at the R angle of the connection between the first flange part and the first extension part, thereby improving the structural strength.

[0023] In some embodiments, the first extension part and the first flange part are stamped and formed from a single piece.

[0024] In some embodiments, the second structure further comprises a second flange, one end of the second flange is connected to one end of the first extension in a third direction, the other end of the second flange is offset in the first direction away from the accommodation cavity, and the injection molding part is wrapped on both sides of the second flange in the first direction, and the third direction is the length direction of the temperature sampling assembly.

[0025] In the embodiments of the present application, the second structure is provided with a second flange, one end of the second flange is connected to the first extension, and the other end of the second flange is offset in the first direction away from the accommodation cavity. During injection molding, the injection molding part can be wrapped on both sides of the second flange in the first direction. Compared with the case where the injection molding part is wrapped on one side of the second flange, the area of the combination of the injection molding part and the second flange is increased, the strength of the combination of the injection molding part and the second flange is improved, and thus the structural strength and sealing performance of the entire shell assembly are improved.

[0026] In some embodiments, the angle of the second flange relative to the inclination of the first extension is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0027] In the embodiments of the present application, the angle of the second flange relative to the first extension is set within a certain range, which can not only ensure that the amount of the injection molding part on both sides of the second flange is sufficient to achieve the heat insulation effect, but also reduce the risk of stress concentration at the R angle of the connection between the second flange and the first extension, and improve the structural strength.

[0028] In some embodiments, the injection molding part comprises:

[0029] a top portion, the top portion is arranged apart from the first structure in a second direction, and the second direction is the thickness direction of the temperature sampling assembly;

[0030] two end portions, the end portions are connected to both ends of the top portion in the first direction, and each of the end portions is injection molded and wrapped on the outside of one of the second structures.

[0031] In the embodiments of the present application, the top portion, the first structure, and the two second structures jointly form an accommodation cavity, and the reliable connection between the injection molding part and the insert is formed by wrapping the end portions on the outside of the second structures.

[0032] In some embodiments, the injection molding part further comprises:

[0033] a side portion, the side portion is connected to the two end portions and the top portion, the side portion is arranged at one end of the insert in a third direction, and the other end of the injection molding part is arranged open in the third direction.

[0034] The shell assembly is provided as an open structure at one end, which is beneficial for glue filling, and reduces the risk of water vapor intrusion.

[0035] In some embodiments, the end portion is provided with a groove on a side thereof away from the accommodating cavity in the first direction, the groove is provided through in the third direction, and an opening of the groove is formed on the side of the end portion away from the accommodating cavity in the first direction, and the groove is detachably connected with the current-conducting component.

[0036] In the embodiments, the end portion is provided with the groove, the groove is provided through in the third direction, and the temperature sampling assembly can slide relative to the current-conducting component in the third direction to achieve the connection and detachability of the temperature sampling assembly and the current-conducting component in the third direction.

[0037] In some embodiments, the current-conducting component comprises a body portion, the body portion is provided with a mounting groove at one end thereof in the third direction, the injection molding part can be inserted into the mounting groove, and part of the body portion forming the mounting groove is inserted into the groove of the end portion.

[0038] In the embodiments, the body portion and the temperature sampling assembly are limited by the mounting groove, which is beneficial for improving the convenience of the connection of the temperature sampling assembly and the current-conducting component, thereby improving the efficiency of the installation of the temperature sampling assembly, and the temperature sampling assembly can be disassembled relative to the current-conducting component, thereby improving the maintainability of the temperature sampling assembly.

[0039] In some embodiments, the groove is provided with a first protruding portion, the first protruding portion is protruded from a first bottom wall of the groove in the first direction, and in the state that the body portion is inserted into the groove, the body portion abuts against the first protruding portion to be spaced apart from the first bottom wall of the groove.

[0040] In the embodiments, the first protruding portion is arranged in the groove, so that the body portion is spaced apart from the first bottom wall in the first direction, which is beneficial for reducing the contact area of the body portion and the first bottom wall, and increasing the air filling between the body portion and the first bottom wall, thereby playing a role of heat preservation and heat insulation.

[0041] In some embodiments, the end portion comprises two first side walls, the first side walls are wall surfaces of the end portion close to the groove and opposite to each other in the second direction, and the two first side walls are each provided with a second protruding portion protruded in the second direction, and in the case that the body portion is inserted into the groove, the two second protruding portions abut against two sides of the body portion in the second direction.

[0042] The application embodiment inserts the injection molding part in the shell assembly into the busbar assembly through the grooves at both ends, and fixes the busbar assembly in the second direction through the two second protrusions, designs the clamping structure on the thickness of the busbar assembly, absorbs the vibration of the busbar assembly by the injection molding part, and reduces the risk of stress transmission to the temperature acquisition assembly.

[0043] In some embodiments, the body part is in interference fit with the two second protrusions.

[0044] The application embodiment sets the body part in interference fit with the two second protrusions, so that the stress generated by the busbar assembly is more conducive to being concentrated on the injection molding part, and the risk of stress transmission to the temperature acquisition assembly is reduced, thereby reducing the risk of damage to the temperature acquisition assembly.

[0045] In some embodiments, the end part is provided with a guide surface at one end in the third direction, and the guide surface is provided in a circular arc transition.

[0046] The application embodiment designs a slope guide on the head of the temperature acquisition assembly and the busbar assembly, which is conducive to improving the installation accuracy and reducing the risk of damage to the temperature acquisition assembly and the busbar assembly during assembly, thereby improving the assembly efficiency.

[0047] In some embodiments, the temperature detection part is externally provided with a structure of encapsulating glue. The thermosensitive ceramic which exhibits different resistance values at different temperatures is used to convert the temperature signal into an electric signal, which is conducive to improving the insulation performance of the temperature detection part, increasing the glue encapsulation thickness, and preventing water from entering.

[0048] In some embodiments, the temperature detection part and the shell assembly are provided with encapsulating glue therebetween.

[0049] The application embodiment also provides a battery device, which is used for providing electric energy.

[0050] The shell assembly is arranged as an injection molding part which at least injection molding covers the outside of the insert to jointly form the containing cavity, thereby improving the sealing performance of the shell assembly, reducing the risk of water vapor intrusion, improving the long-term reliability of the temperature detection part working in the containing cavity, and reducing the risk of heat dissipation in the containing cavity; and the thermal conductivity of the insert is higher than that of the injection molding part, thereby facilitating the heat of the battery monomer to be directly transmitted to the temperature detection part through the insert, reducing the risk of temperature transmission on the busbar component to the injection molding part, reducing the influence of the temperature on the busbar component on the temperature detection part, improving the precision and accuracy of the temperature detection part in detecting the temperature of the battery monomer, and improving the use stability and reliability of the battery device. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by the drawings without creative labor for those skilled in the art.

[0052] Figure 1 is a structural schematic diagram of a use electric equipment disclosed by the embodiments of the present application;

[0053] Figure 2 is a structural schematic diagram of a battery disclosed by the embodiments of the present application;

[0054] Figure 3 is a structural schematic diagram of a temperature sampling assembly disclosed by the embodiments of the present application;

[0055] Figure 4 is a top view of the temperature sampling assembly disclosed by the embodiments of the present application;

[0056] Figure 5 is a side view of the temperature sampling assembly disclosed by the embodiments of the present application;

[0057] Figure 6 is Figure 5 A-A section view in the middle;

[0058] Figure 7 is an exploded view of the temperature sampling assembly disclosed by the embodiments of the present application;

[0059] Figure 8 is a structural schematic diagram of a shell assembly of the embodiments of the present application;

[0060] Figure 9 is a top view of the shell assembly of the embodiments of the present application;

[0061] Figure 10 is Figure 9 is a sectional view of B-B part in figure 1;

[0062] Figure 11 is a structural schematic view of the insert of the embodiment of the present application;

[0063] Figure 12 is a structural schematic view of the temperature sampling assembly and the busbar component of the embodiment of the present application;

[0064] Figure 13 is a structural schematic view of the temperature sampling assembly and the busbar component of the embodiment of the present application.

[0065] In the drawings, the drawings are not drawn according to the actual proportion.

[0066] Label description:

[0067] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery monomer; 214, upper cover; 211, carrier; 10, battery monomer; 3, busbar component; 31, body part; 310, mounting groove; 4, temperature sampling assembly; 400, containing cavity; 401, groove; 4010, first protruding part; 4011, first bottom wall; 41, shell assembly; 411, insert; 4111, first structure; 4112, second structure; 41120, through hole; 41121, first extension; 41122, first flange part; 41123, second flange part; 412, injection molding part; 4121, top part; 4122, end part; 41221, first side wall; 41222, second protruding part; 41223, guide surface; 4123, side part; 42, temperature detection part. DETAILED DESCRIPTION

[0068] It should be noted that the embodiments and technical features in the present application can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as the explanation and description of the purpose of the present application, and should not be regarded as improper limitation of the present application.

[0069] 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 belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the present application are intended to cover non-exclusive inclusion.

[0070] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0071] Reference to "embodiments" herein means that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiments, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] In the description of the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0073] In the description of the embodiments of the present 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, be operated or used, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0074] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0075] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact with each other without interaction force or contact between two objects in contact with each other with interaction force.

[0076] With the development of clean energy, more and more devices use electric energy as driving energy, and then as power battery which can store more electric energy and can be charged and discharged repeatedly. For example, lithium ion battery. Among them, power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields.

[0077] With the vigorous promotion of new energy vehicles by the state, new energy vehicles have ushered in a good opportunity for development. The safety and stability of the vehicle have always been the most concerned by people. Therefore, improving the safety of new energy vehicles will be one of the important factors to determine whether new energy vehicles can be rapidly popularized. Improving the safety of the battery is an important way to improve the safety of new energy vehicles.

[0078] The battery apparatus mentioned in the embodiments of the present application refers to one or more battery monomers, and can also include one or more battery monomer assemblies, which are single physical modules for providing higher voltage and capacity. The battery monomer assembly can include a plurality of battery monomers, and the plurality of battery monomers are connected in series, parallel or mixed connection through a busbar component.

[0079] In some embodiments, the battery monomer assembly is usually formed by arranging a plurality of battery monomers; as an example, the battery refers to the battery monomer assembly, and when there are a plurality of battery monomers, the battery module is formed by arranging and fixing a plurality of battery monomers into an independent module battery module. As an example, the battery module can be bundled by a cable tie to form a plurality of battery monomers.

[0080] In some embodiments, the battery apparatus can be a battery pack, which includes a box body and one or more battery monomer assemblies, and the battery monomer assemblies are accommodated in the box body.

[0081] As an example, the battery monomer assembly can be a battery module, and the battery monomer assembly can be accommodated in the box body by fixing the battery module in the box body.

[0082] As an example, the battery cell assembly can also be housed in the case by directly fixing a plurality of battery cells to the case.

[0083] As an example, the case can include a first case and a second case. The first case and the second case are coupled so that an inner portion of the case forms a closed space to receive the battery cell or the battery module cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0084] As an example, the case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an inner portion of the case forms a closed space to receive the battery cell or the battery module cell assembly.

[0085] As an example, the case can be a part of a chassis structure of a vehicle. For example, the top cover of the case can be at least a part of a floor of the vehicle, or the frame of the case can be at least a part of a cross beam and a longitudinal beam of the vehicle.

[0086] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a case, at least one side of the case is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0087] The battery cell can include an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly works by moving metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, 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 without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without 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 the fuse does not occur when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0088] As an example, the positive electrode current collector has two opposite surfaces in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0089] Exemplarily, the positive current collector can adopt a metal foil or a composite current collector. For example, as the metal foil, silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon, nickel or titanium, etc. can be adopted. The composite current collector can include a polymer material base layer 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 material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0090] Exemplarily, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0091] Exemplarily, the negative current collector can adopt a metal foil or a composite current collector. For example, as the metal foil, silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon, nickel or titanium, etc. can be adopted.

[0092] Exemplarily, the negative current collector has two surfaces opposite in the thickness direction thereof, and the negative active material is disposed on any one or both of the two opposite surfaces of the negative current collector.

[0093] Exemplarily, the negative active material can adopt a negative active material for a battery known in the art. As an example, the negative active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite, and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound, and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery negative active material can also be used. These negative active materials can be used alone or in combination of two or more.

[0094] The battery cell further includes an insulating film wrapped outside the electrode assembly and a case encapsulating the electrode assembly wrapped with the insulating film to form the battery cell. The insulating film can be a mylar film, and the case can be an aluminum case or a steel case. The encapsulation of the mylar film and the case is completed after the electrode assembly is wound into a shape through a mylar wrapping process and a case insertion process. The mylar film plays a role of sealing and protecting the electrode assembly, and the mylar film can effectively insulate the electrode assembly and the case from each other to prevent internal short circuit of the battery cell. The case plays a role of protection.

[0095] Exemplarily, the shell comprises a top cover and a shell body, the shell body is provided with an opening, and the top cover closes the opening to form a sealed space for accommodating the electrode assembly, the electrolyte and the like. The shell body can be provided with one or more openings. The top cover can also be provided with one or more openings.

[0096] Exemplarily, at least one electrode terminal is arranged on the shell, and the electrode terminal is electrically connected with the tab of the electrode assembly. The electrode terminal can be directly connected with the tab or indirectly connected with the tab through an adapter. The electrode terminal can be arranged on the top cover or arranged on the shell body.

[0097] Exemplarily, a pressure relief member is arranged on the shell. The pressure relief member is used for relieving the internal pressure of the battery monomer. It should be noted that the pressure relief member can be an explosion-proof valve or a pressure relief hole.

[0098] The development of battery technology needs to consider various design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters, and also needs to consider the safety and reliability of the battery.

[0099] In order to ensure the safety of the battery monomer, a temperature sampling assembly is generally arranged in the battery device, and the temperature sampling assembly can collect and monitor the temperature of the battery monomer during use, so as to obtain the use condition of the battery. The temperature sampling assembly usually comprises a temperature sensor and a mounting bracket for assembling the temperature sensor. The mounting bracket is usually mounted on the busbar component of the battery, and the mounting bracket and the battery monomer are in contact with each other, so that the temperature sensor contained in the mounting bracket can detect the temperature of the battery monomer. However, the temperature of the busbar component during use will also be transmitted to the temperature sensor through the mounting bracket, resulting in inaccurate detection results of the temperature sensor on the temperature of the battery monomer, so that the use condition of the battery monomer inside the battery cannot be effectively obtained, which is not conducive to improving the use stability and reliability of the battery.

[0100] The battery device provided by the embodiment of the present application comprises a box, a battery monomer, a current collecting component and a temperature sampling assembly. The box is internally provided with a mounting space. The battery monomer is arranged in the mounting space. The current collecting component is electrically connected with the plurality of battery monomers. The temperature sampling assembly comprises a shell assembly and a temperature detecting piece. The temperature detecting piece is configured to detect the temperature of the battery monomer. The shell assembly is wrapped outside the temperature assembly. The shell assembly comprises an insert and an injection molded piece. The injection molded piece is at least injection molded to wrap outside the insert to jointly form a containing cavity with the insert. The temperature detecting piece is arranged in the containing cavity. The thermal conductivity of the insert is higher than that of the injection molded piece. The shell assembly is arranged to be at least injection molded to wrap outside the insert to jointly form the containing cavity. This is favorable to improve the sealing property of the shell assembly, reduce the risk of water vapor intrusion, improve the long-term reliability of the temperature detecting piece working in the containing cavity, and reduce the risk of heat dissipation in the containing cavity. The thermal conductivity of the insert is higher than that of the injection molded piece. This is favorable to directly transfer the heat of the battery monomer to the temperature detecting piece through the insert, alleviate the risk of the temperature on the current collecting component being transferred to the injection molded piece, reduce the influence of the temperature on the current collecting component on the temperature detecting piece, improve the precision and accuracy of the temperature detecting piece detecting the temperature of the battery monomer, and thus the temperature sampling assembly can more effectively obtain the use condition of the battery monomer inside the battery device, and improve the use stability and reliability of the battery device.

[0101] The technical solution described in the embodiment of the present application is applicable to an electric device using a battery. The electric device comprises the battery of any embodiment of the present application, and the battery is used to provide electric energy.

[0102] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the present application do not specially limit the above electric devices.

[0103] It should be noted that the technical solution described in the embodiments of the present application is not only limited to the above described battery device and electric device, but also applicable to all battery devices comprising a box and electric devices using the battery device. However, for the sake of simplicity, the following embodiments are described by taking an electric vehicle as an example.

[0104] Referring to Figure 1 , the inside of the vehicle 1000 can be provided with a controller 200, a motor 300 and a battery device 100, the controller 200 being configured to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be provided at the bottom or the front or the rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000, for example, used for the circuit system of the vehicle 1000, for example, used for the power demand of the vehicle 1000 during starting, navigation and operation. In another embodiment of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0105] The embodiments of the present application provide a battery device, as shown in Figure 2 and Figure 3 , the battery device 100 comprises a box body, a battery cell 10, a current collecting component 3 (as shown in Figure 12 and Figure 13 ) and a temperature sampling assembly 4.

[0106] In order to meet different power requirements, the battery device 100 can comprise a plurality of battery cells 10, and the battery cell 10 refers to the smallest unit constituting the battery module or the battery device 100. The plurality of battery cells 10 can be connected in series, in parallel or in a mixed manner, and the mixed manner refers to that there are both series connection and parallel connection among the plurality of battery cells. The plurality of battery cells 10 can be directly connected in series, in parallel or in a mixed manner, and then the whole plurality of battery cells 10 is accommodated in the box body; of course, the battery device 100 can also be in the form that the plurality of battery cells 10 are connected in series, in parallel or in a mixed manner to form a battery module, and then the plurality of battery modules are connected in series, in parallel or in a mixed manner to form a whole, and are accommodated in the box body. The battery device 100 can also comprise other structures, for example, the battery device 100 can also comprise the current collecting component 3, and the current collecting component 3 is used to realize the electrical connection among the plurality of 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 thereto. The battery cell 10 can be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0107] The box body can be a simple cuboid or a cylinder or a sphere, or a complex cuboid structure composed of a simple cuboid or a cylinder or a sphere. The material of the box body can be an alloy material such as aluminum alloy or iron alloy, or a high polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin.

[0108] The box is used to accommodate the battery monomer assembly or the battery module. The box can be of various structures. In some embodiments, referring to Figure 2 , the box can include an upper cover 214 and a carrier 211, the upper cover 214 and the carrier 211 are covered with each other, and the upper cover 214 and the carrier 211 jointly define a mounting space for accommodating the battery monomer 10. The carrier 211 can be a hollow structure with one end open, and the upper cover 214 is a plate-shaped structure, which covers the open side of the carrier 211 to form a box with a mounting space; the upper cover 214 and the carrier 211 can also be a hollow structure with one side open, and the open side of the upper cover 214 covers the open side of the carrier 211 to form a box with a mounting space. Of course, the upper cover 214 and the carrier 211 can be of various shapes, such as a cylinder, a cuboid, etc.

[0109] In order to improve the sealing performance of the upper cover 214 and the carrier 211 after being connected, a sealing member such as sealing glue, a sealing ring, etc. can be arranged between the upper cover 214 and the carrier 211.

[0110] Suppose that the upper cover 214 covers the top of the carrier 211, the upper cover 214 can also be called an upper box cover, and the carrier 211 can also be called a lower box cover.

[0111] In order to ensure the safety of the battery monomer, in combination with Figure 3 , a temperature sampling assembly 4 is generally arranged in the battery device, which can collect and monitor the temperature of the battery monomer 10 in the use process, so as to obtain the use condition of the battery. The temperature sampling assembly generally includes a temperature sensor and a mounting bracket for assembling the temperature sensor. The mounting bracket is usually mounted on the busbar component of the battery, and the mounting bracket is in contact with the battery monomer, so that the temperature sensor accommodated in the mounting bracket can detect the temperature of the battery monomer. However, the temperature of the busbar component in the use process of the battery will also be transmitted to the temperature sensor through the mounting bracket, resulting in inaccurate detection result of the temperature sensor on the temperature of the battery monomer, so that the use condition of the battery monomer inside the battery cannot be effectively obtained, which is not conducive to improving the use stability and reliability of the battery.

[0112] As shown in Figures 3-7 , the temperature sampling assembly 4 of the embodiment of the application includes a shell assembly 41 and a temperature detection member 42. The temperature detection member 42 is configured to detect the temperature of the battery monomer 10, and the shell assembly 41 is wrapped outside the temperature detection member 42. It should be noted that wrapping means that the shell assembly 41 is arranged outside the temperature detection member 42, so that the temperature detection member 42 is isolated from the external water vapor, and the shell assembly 41 can protect the temperature detection member 42 to improve the reliability of the temperature detection member 42 in operation.

[0113] As shown in Figures 8-11 The shell assembly 41 comprises an insert 411 and an injection molding part 412; the injection molding part 412 at least partially injection-molds the outside of the insert 411 to form a containing cavity 400 together with the insert 411; as shown in Figure 6 and Figure 7 The temperature detection part 42 is arranged in the containing cavity 400, and the thermal conductivity of the insert 411 is higher than that of the injection molding part 412.

[0114] It should be noted that the insert 411 and the injection molding part 412 in the embodiments of the present application are integrally formed, specifically, the shell assembly in the embodiments of the present application is formed by using an injection molding process, that is, the insert 411 is first embedded in the injection molding material, and part of the independent insert 411 is surrounded by the injection molding material during the injection molding process, thereby forming an integrated shell assembly 41.

[0115] It should be noted that the insert 411 in the embodiments of the present application can be metal or hard plastic.

[0116] It should be noted that the injection molding part covers part of the surface of the insert 411, so that the injection molding part 412 after covering and forming and the remaining insert 411 not covered together form a containing cavity 400 for containing the temperature detection part 42. The thermal conductivity of the insert 411 is higher than that of the injection molding part 412, that is, the heat generated by the battery monomer 10 is conducted from the insert 411 with high thermal conductivity to the temperature detection part 42 as much as possible, and the heat is conducted from the injection molding part 412 with lower thermal conductivity to the temperature detection part 42 as little as possible, thereby reducing the risk of heat conduction from other components to the temperature detection part 42, reducing the interference of the temperature detection part on the temperature detection of the battery monomer, thereby facilitating to improve the temperature detection sensitivity of the temperature detection part on the temperature detection of the battery monomer. And the thermal conductivity of the injection molding part is lower than that of the insert, which is conducive to the heat of the battery monomer being directly transmitted to the temperature detection part through the insert, and also conducive to reducing the risk of temperature on the busbar part being transmitted to the injection molding part, thereby reducing the influence of the temperature on the busbar part on the temperature detection part, and facilitating to improve the precision and accuracy of the temperature detection part in detecting the temperature of the battery monomer, thereby enabling the temperature sampling assembly to more effectively obtain the use of the battery monomer inside the battery, to improve the use stability and reliability of the battery.

[0117] And the shell assembly in the embodiments of the present application adopts the form of the injection molding part covering part of the insert, and the sealing performance of this structure is higher, which is conducive to improving the reliability of the temperature detection part in working, and reducing the risk of device failure caused by water vapor leakage. And it is conducive to improving the sealing performance of the containing cavity, so as to play a role in heat preservation and heat insulation, and reduce the risk of temperature escaping from the containing cavity.

[0118] The battery disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system comprising such an electrical device can be used, incorporating the battery disclosed in this application. This helps to alleviate the problem of inaccurate temperature detection results of individual battery cells by the temperature sampling component, thereby improving the stability and reliability of the battery.

[0119] This application provides a battery device including a housing, battery cells, a current collector, and a temperature sampling component. The housing has an installation space, and the battery cells are disposed within the installation space. The current collector is electrically connected to multiple battery cells. The temperature sampling component includes a housing assembly and a temperature detection element, which is configured to detect the temperature of the battery cells. The housing assembly covers the outside of the temperature sampling component and includes an insert and an injection-molded part. The injection-molded part at least covers the outside of the insert to form a receiving cavity together with the insert. The temperature detection element is disposed within the receiving cavity. The thermal conductivity of the insert is higher than that of the injection-molded part. This embodiment of the application, by configuring the housing assembly as an injection-molded part that at least injection-molded over the outside of the insert to jointly form a receiving cavity, is beneficial to improving the sealing performance of the housing assembly, reducing the risk of moisture intrusion, thereby improving the long-term reliability of the temperature sensing element working within the receiving cavity, and also helps to achieve a heat preservation effect, reducing the risk of heat dissipation within the receiving cavity; moreover, the thermal conductivity of the insert is higher than that of the injection-molded part, which facilitates the direct transfer of heat from the battery cell to the temperature sensing element through the insert, and also helps to mitigate the risk of temperature transfer from the busbar component to the injection-molded part, thereby reducing the impact of the temperature on the busbar component on the temperature sensing element, which helps to improve the accuracy and precision of the temperature sensing element in detecting the temperature of the battery cell, and thus enables the temperature sampling component to more effectively obtain the usage status of the battery cells inside the battery device, thereby improving the stability and reliability of the battery device.

[0120] In some embodiments, such as Figure 6 As shown, insert 411 is a metal part, and injection molded part 412 is a non-metal part. That is to say, in the processing of the housing assembly, the metal part is first formed according to the set structure, and then the metal insert 411 is placed into the injection mold. The injection molding process is used to cover at least part of the outer surface of the insert with injection molding material, so that the insert and the injection molded part together form a receiving cavity.

[0121] It should be noted that the injection-molded parts in this embodiment can be made of plastic particles with a thermal conductivity of less than 0.1. The inserts are made of metal to give them high thermal conductivity. The metal and non-metal components are combined using an insert injection molding structure, which helps improve the structural strength of the housing assembly and reduces heat transfer from the metal to the non-thermally conductive surfaces. The metal parts also act as protection and support for the thermally conductive surfaces, reducing the impact and transmission of external stress from these surfaces. In this embodiment, the metal parts are positioned on the thermally conductive surface of the temperature sampling component. By making the thermally conductive surface metal, it is beneficial to provide a faster temperature conduction speed for the temperature sensing element.

[0122] This application embodiment sets the insert as a metal part and the injection molded part as a non-metal part, and adopts the insert injection molding process. This can achieve a reliable connection between the metal and non-metal structures, and also meet the requirement that the thermal conductivity of the insert 411 is higher than that of the injection molded part. This can improve the reliability of the temperature detection component while reducing the processing difficulty of the housing assembly.

[0123] In some embodiments, such as Figures 8-11 As shown, the insert 411 includes a first structural member 4111 and a second structural member 4112. The first structural member 4111 and the second structural member 4112 are integrally formed. The first structural member 4111 has a planar structure. It should be noted that the planar structure means that the first structural member 4111 is generally planar, and the opposite sides of the first structural member 4111 are generally planar. The second structural member 4112 is connected to the edge of the first structural member 4111, and the extension direction of the second structural member 4112 is set at an angle to the extension direction of the first structural member 4111. The injection molded part 412 covers the outside of the second structural member 4112, but does not cover the outside of the first structural member 4111, so that the injection molded part 412 and the first structural member 4111 together form a receiving cavity 400, and a reliable connection relationship is formed between the injection molded part 412 and the second structural member 4112.

[0124] In this embodiment, the insert is configured as two parts: a first structural component and a second structural component. The second structural component is covered by an injection molded part, which achieves a reliable connection between the injection molded part and the insert. The injection molded part and the first structural component form a cavity that can be used to accommodate the temperature detection component. This allows the heat from the battery cell to be transferred to the temperature detection component through the first structural component while reducing the heat transfer through the second structural component, thereby improving the reliability of the temperature detection component.

[0125] In some embodiments, such as Figure 10 As shown, the insert 411 includes two second structural members 4112, which are connected to the first structural member 4111 in a first direction ( Figure 10The first direction is the width direction of the temperature sampling assembly. That is, the two second structural members 4112 in the embodiment of the application are arranged at intervals in the width direction of the temperature sampling assembly. The embodiment of the application provides two second structural members, and in the process of injection molding, the injection molding part can be over-molded with the two second structural members, which is beneficial to improving the stability of the connection between the injection molding part and the insert and improving the sealing performance of the shell assembly.

[0126] In some embodiments, as shown in Figure 10 and Figure 11 The second structural member 4112 includes a first extension part 41121 and a first flange part 41122. The first extension part 41121 is connected to the first structural member 4111 at one end in the second direction (the lower end in the Z direction as shown in Figure 10 The first extension part 41121 extends substantially in the second direction (the Z direction as shown in Figure 10 The other end of the first flange part 41122 is offset in the first direction (the X direction as shown in Figure 10 That is, the extension direction of the first flange part 41122 is inclined relative to the second direction, or it can be understood that the extension direction of the first flange part 41122 has a certain included angle with the second direction. The injection molding part 412 is over-molded on both sides of the first flange part 41122 in the first direction (the X direction as shown in Figure 10 The first flange part 41122 has two opposite sides in the first direction, one side is closer to the accommodation cavity than the other side, and the injection molding part 412 is over-molded on both sides of the first flange part 41122 in the first direction, which means that the injection molding part 412 is over-molded on both sides of the first flange part 41122.

[0127] The embodiment of the application provides a first extension part and a first flange part for the second structural member. One end of the first extension part is connected to the first structural member, one end of the first flange part is connected to the first extension part, and the other end of the first flange part is offset in the first direction away from the accommodation cavity relative to the first extension part. In the process of injection molding, the injection molding part can be over-molded on both sides of the first flange part in the first direction, which is beneficial to increasing the area of the combination of the injection molding part and the first flange part and improving the strength of the combination of the injection molding part and the first flange part, thereby improving the structural strength and sealing performance of the entire shell assembly.

[0128] In some embodiments, as shown in Figure 10 The injection molding part 412 is over-molded on both sides of the first extension part 41121 in the first direction (the X direction as shown in Figure 10The first extending part 41121 is away from the side of the accommodating cavity 400, which is beneficial to reduce the difficulty of the process in the injection molding process and improve the processing efficiency of the injection molding part 412 and the embedded part 411.

[0129] In some embodiments, as shown in Figure 11 The first extending part 41121 is in a frame structure, and the inner edge of the first extending part 41121 forms a hollow through hole 41120. One end of the first flange part 41122 is connected to the inner edge of the first extending part 41121. In the embodiment of the present application, the second structure part can be directly punched out of the first flange part 41122 on the metal part by stamping forming, and the corresponding area of the first flange part 41122 is directly formed into the through hole 41120.

[0130] The first extending part and the first flange part are processed by stamping forming in the embodiment of the present application, which is beneficial to improve the processing efficiency of the second structure part.

[0131] In some embodiments, as shown in Figure 10 The angle θ of the first flange part 41122 relative to the first extending part 41121 is greater than or equal to 30 degrees and less than or equal to 60 degrees. It should be noted that the angle of the first flange part 41122 relative to the first extending part 41121 in the embodiment of the present application represents the included angle between the extension direction of the first flange part 41122 and the extension direction of the first extending part 41121. The included angle θ can be set to 40 degrees, 45 degrees, 50 degrees, 55 degrees, etc.

[0132] The angle of the first flange part relative to the first extending part is set within a certain range in the embodiment of the present application, which can not only ensure that the amount of the injection molding part on both sides of the first flange part is sufficient to achieve the heat insulation effect, but also reduce the risk of stress concentration at the R angle of the connection between the first flange part and the first extending part, and improve the structural strength.

[0133] In some embodiments, as shown in Figure 11 The second structure part 4112 further includes a second flange part 41123. One end of the second flange part 41123 is connected to one end of the first extending part 41121 in the third direction (refer to Figure 11 The Y direction), and the third direction is the length direction of the temperature sampling assembly 4. The other end of the second flange part 41123 is offset in the first direction away from the accommodating cavity 400, and the injection molding part 412 covers both sides of the second flange part 41123 in the first direction.

[0134] That is, the extending direction of the second flange portion 41123 is arranged obliquely relative to the third direction, and it can also be understood that the extending direction of the second flange portion 41123 has a certain included angle with the third direction. The injection molding part 412 is wrapped on both sides of the first flange portion 41122 in the first direction. Among them, the second flange portion 41123 has opposite sides in the first direction, one side is closer to the accommodation cavity than the other side, and the injection molding part 412 wrapped on the opposite sides of the second flange portion 41123 in the first direction means that the injection molding part 412 is wrapped on the left and right sides of the second flange portion 41123.

[0135] The second structure is provided with a second flange portion, one end of the second flange portion is connected to the first extending portion, and the other end of the second flange portion is offset relative to the first extending portion in the first direction away from the accommodation cavity. During the injection molding process, the injection molding part can be wrapped on the opposite sides of the second flange portion in the first direction. Compared with the case where the injection molding part is wrapped on one side of the second flange portion, the area of the combination of the injection molding part and the second flange portion is increased, the strength of the combination of the injection molding part and the second flange portion is improved, and thus the structural strength and sealing performance of the entire shell assembly are improved.

[0136] In some embodiments, as shown in Figure 11 The angle of the second flange portion 41123 relative to the first extending portion 41121 is greater than or equal to 30 degrees and less than or equal to 60 degrees. It should be noted that the angle of the second flange portion 41123 relative to the first extending portion 41121 in the present application represents the included angle between the extending direction of the second flange portion 41123 and the extending direction of the first extending portion 41121. The angle can be set to 40 degrees, 45 degrees, 50 degrees, 55 degrees, etc.

[0137] The angle of the second flange portion relative to the first extending portion is set within a certain range, which can not only ensure that the amount of injection molding parts on both sides of the second flange portion is sufficient to achieve heat insulation effect, but also reduce the risk of stress concentration at the R angle of the connection between the second flange portion and the first extending portion, and improve the structural strength.

[0138] In some embodiments, as shown in Figure 10 The injection molding part 412 includes a top portion 4121 and two end portions 4122. The top portion 4121 is arranged spaced apart from the first structure 4111 in the second direction (Z direction), and the second direction is the thickness direction of the temperature sampling assembly; the two end portions 4122 are connected to the two ends of the top portion 4121 in the first direction (X direction), and each end portion 4122 is injection molded and wrapped on the outer side of one second structure 4112. Figure 10 Figure 10

[0139] ​​In this embodiment, the top 4121, the first structural member 4111, and the two second structural members 4112 together form a receiving cavity 400. By covering the end with the outside of the second structural member, a reliable connection between the injection molded part and the insert is formed.

[0140] In some embodiments, such as Figure 8 As shown, the injection molded part 412 also includes a side portion 4123, which connects the two ends 4122 and the top 4121. The side portion 4123 is disposed at one end of the insert 411 in a third direction, and the injection molded part 412 is open at the other end in the third direction. That is, in this embodiment, the side portion 4123, the two ends 4122, the top 4121, and the first structural member 4111 together form a receiving cavity 400 with one end open. By setting the housing assembly to a structure with one end open, this embodiment facilitates the potting of adhesive and reduces the risk of moisture intrusion.

[0141] In some embodiments, such as Figure 10 As shown, end portion 4122 in the first direction ( Figure 10 A groove 401 is provided on the side away from the receiving cavity 400 in the X direction (as shown), and the groove 401 is in the third direction ( Figure 10 The groove 401 is formed through the paper in a direction perpendicular to the paper surface, and the opening of the groove 401 is formed on the side of the end 4122 away from the receiving cavity 400 in the first direction, such as... Figure 12 and Figure 13 As shown, the groove 401 is detachably connected to the busbar component 3.

[0142] In this embodiment, a groove 401 is provided at the end, which is provided through the groove 401 in the third direction. The temperature sampling component 4 can slide relative to the busbar component 3 in the third direction, so as to realize the connection and detachment of the temperature sampling component and the busbar component 3 in the third direction.

[0143] 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.

[0144] In some embodiments, such as Figure 13 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 mounting groove 310 penetrates the body part 31 in a second direction. The injection molded part 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 401 of the end 4122.

[0145] 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.

[0146] In some embodiments, such as Figure 8 , Figure 10 Figure 13 As shown, a first protrusion 4010 is provided in the groove 401, and the first protrusion 4010 extends from the first bottom wall 4011 of the groove 401 along a first direction ( Figure 10 The body portion 31 is provided with a protrusion in the X direction (as shown). When the body portion 31 is inserted into the groove 401, the body portion 31 abuts against the first protrusion 4010, and is spaced apart from the first bottom wall 4011 of the groove 401. That is, when the temperature sampling assembly is connected to the busbar component, the body portion of the busbar component is inserted into the groove 401 of the temperature sampling assembly, such that the body portion 31 protrudes in the first direction (X direction). Figure 10 The body portion 31 abuts against the first protrusion 4010 in the X direction (as shown), so that the body portion 31 is spaced apart from the first bottom wall 4011 in the first direction.

[0147] In this embodiment, by providing a first protrusion in the groove, the main body and the first bottom wall are spaced apart in the first direction, which helps to reduce the contact area between the main body and the first bottom wall and increase the air filling between the main body and the first bottom wall, thereby achieving the effect of heat insulation.

[0148] In some embodiments, such as Figure 8 As shown, end portion 4122 includes two first sidewalls 41221, the two first sidewalls 41221 in the second direction (refer to...) Figure 8 The two sidewalls 41221 are arranged opposite each other in the Z direction (as shown), and the first sidewall 41221 is the wall surface of the end 4122 near the groove 401; both first sidewalls 41221 are provided along the second direction (refer to the second direction). Figure 8 The second protrusion 41222 protrudes in the Z direction, when the main body 31 is inserted into the groove, the two second protrusions 41222 abut against the two sides of the main body 31 in the second direction.

[0149] In this embodiment, the injection-molded part 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 injection-molded part absorbs the vibration of the busbar component, reducing the risk of the clamping stress being transmitted to the temperature acquisition component.

[0150] In some embodiments, such as Figure 12As shown, the body part 31 is in interference fit with the two second protruding parts 41222.

[0151] It should be noted that the interference fit means that the gap of the two second protruding parts in the second direction is smaller than the thickness of the busbar component, and the difference between the gap of the two second protruding parts in the second direction and the thickness of the busbar component is defined as the interference amount, which can be greater than or equal to 0.1 mm and less than or equal to 0.2 mm in the embodiment of the present application. In some embodiments, the interference amount can be 0.15 mm.

[0152] The embodiment of the present application sets the body part and the two second protruding parts in interference fit, so that the stress generated by the busbar component is more conducive to being concentrated on the injection molding part, and the risk of stress being transmitted to the temperature collection assembly is reduced, thereby reducing the risk of the temperature collection assembly being damaged.

[0153] In some embodiments, as shown in Figure 8 As shown, the end part 4122 is provided with a guide surface 41223 at one end in the third direction (refer to Y direction shown in Figure 8 The guide surface 41223 is transitionally provided in a circular arc. That is, the guide surface 41223 is smoothly connected with the first side wall 41221, and the guide surface 41223 is provided in a circular arc structure.

[0154] The embodiment of the present application designs a slope guide at the head of the temperature collection assembly and the busbar assembly, which is conducive to improving the installation accuracy and reducing the risk of the temperature collection assembly and the busbar assembly being damaged in the assembly process, thereby improving the assembly efficiency.

[0155] In some embodiments, the temperature detection part is externally provided with a structure of encapsulating glue. In some embodiments, the temperature sampling part is provided as a single-ended lead temperature sampling part, which can adopt an epoxy NTC (Negative Temperature Coefficient) and a glass-encapsulated NTC. The epoxy NTC means that the surface of the thermosensitive ceramic is encapsulated by epoxy glue, and the glass-encapsulated NTC means that the surface of the thermosensitive ceramic is encapsulated by glass contact. The epoxy NTC and the glass-encapsulated NTC are both composed of a thermosensitive ceramic with contact encapsulation and a signal transmission lead. The temperature sampling part mainly realizes temperature sampling of the wire harness NTC assembly, and uses the thermosensitive ceramic which exhibits different resistance values at different temperatures to convert the temperature signal into an electric signal. This is conducive to improving the insulation performance of the temperature detection part, increasing the glue encapsulation thickness, and increasing the waterproof path.

[0156] In some embodiments, the temperature detection part is provided with encapsulating glue between the temperature detection part and the shell assembly.

[0157] In some embodiments, the temperature detection member is subjected to a glue sealing process, the sealing glue is an epoxy system sealing glue, the epoxy system sealing glue has a low water absorption rate, and can more effectively avoid the risk of short circuit of the charged body caused by water vapor intrusion compared with UV glue. Moreover, the sealing glue can fix the single-end lead NTC in the shell, realizing the fixation and connection of each component of the wire harness NTC assembly. The sealing glue encapsulates the NTC and the lead wire in the shell in structure, adopts a multiple encapsulation process, realizes the uniformity of the encapsulation thickness of the temperature detection member, and realizes the central position of the temperature detection member in the shell assembly. Thus, the distance between the temperature detection member and the shell assembly can be ensured, and the insulation and protection are further strengthened. The sealing glue wraps the insulation skin of the lead wire of the temperature detection member in the glue, which is beneficial to increase the path of water vapor intrusion and avoid long-term reliability failure.

[0158] In some embodiments, the process is first to cover the single-end lead temperature sampling member, the lead wire core, the temperature sampling member welding position and the local area of the lead wire skin with encapsulation glue, and then to encapsulate them in the shell assembly by pouring encapsulation glue. Finally, a nested NTC sampling structure with a glue outward convex structure is formed.

[0159] The application also provides a battery device. The battery device comprises a box body, a plurality of battery monomers, a current collecting component and a temperature sampling assembly. The box body has an installation space. The battery monomers are arranged in the installation space. The current collecting component is electrically connected to the battery monomers. The temperature sampling assembly comprises a shell assembly and a temperature detection member. The temperature detection member is configured to detect the temperature of the battery monomers. The shell assembly is arranged outside the temperature assembly. The shell assembly comprises an insert and an injection molding member. The injection molding member is at least injection molded outside the insert to form a containing cavity together with the insert. The temperature detection member is arranged in the containing cavity. The thermal conductivity of the insert is higher than that of the injection molding member. The application can improve the sealing property of the shell assembly, reduce the risk of water vapor intrusion, improve the long-term reliability of the temperature detection member working in the containing cavity, and reduce the risk of heat dissipation in the containing cavity. The thermal conductivity of the insert is higher than that of the injection molding member, which can help to directly transfer the heat of the battery monomers to the temperature detection member, reduce the risk of temperature transfer from the current collecting component to the injection molding member, reduce the influence of the temperature on the current collecting component on the temperature detection member, improve the precision and accuracy of the temperature detection member in detecting the temperature of the battery monomers, and improve the use stability and reliability of the battery device.

[0160] In addition to the embodiments of the above claims, specific embodiments relating to more specific features or combinations thereof can be preferred, as illustrated by the figures.

[0161] Although the present application has been described with reference to preferred embodiments, it is possible that various modifications and alterations can be made hereto without departing from the scope and spirit of the application. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present 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: The housing has an internal installation space. A battery cell, wherein the battery cell is disposed within the installation space; 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 sensing element configured to detect the temperature of the battery cell; the housing assembly covers the outside of the temperature sensing element; wherein the housing assembly includes an insert and an injection-molded part; the injection-molded part is at least partially injection-molded to cover the outside of the insert to form a receiving cavity together with the insert; the temperature sensing element is disposed within the receiving cavity, and the thermal conductivity of the insert is higher than that of the injection-molded part.

2. The battery device according to claim 1, characterized in that, The insert is a metal part, and the injection molded part is a non-metallic part.

3. The battery device according to claim 1, characterized in that, The insert includes a first structural component and a second structural component. The first structural component and the second structural component are integrally formed. The first structural component is a planar structure. The second structural component is connected to the edge of the first structural component. The injection molded part covers the outside of the second structural component to form the receiving cavity together with the first structural component.

4. The battery device according to claim 3, characterized in that, The insert includes two second structural members, which are connected to the two ends of the first structural member in a first direction, the first direction being the width direction of the temperature sampling component.

5. The battery device according to claim 4, characterized in that, The second structural component includes a first extension and a first flange. One end of the first extension is connected to the first structural component in a second direction, which is the thickness direction of the temperature sampling component. One end of the first flange is connected to the first extension, and the other end of the first flange is offset away from the receiving cavity in the first direction. The injection molded part covers both sides of the first flange in the first direction.

6. The battery device according to claim 5, characterized in that, The first extension has a frame-shaped structure, and the inner edge of the first extension forms a hollow through hole. One end of the first flange is connected to the inner edge of the first extension.

7. The battery device according to claim 6, characterized in that, The angle of inclination of the first flange relative to the first extension is greater than or equal to 30 degrees and less than or equal to 60 degrees.

8. The battery device according to claim 6, characterized in that, The first extension and the first flange are formed by stamping from a single piece.

9. The battery device according to claim 5, characterized in that, The second structural component further includes a second flange portion, one end of which is connected to one end of the first extension portion in a third direction, and the other end of the second flange portion is offset away from the receiving cavity in the first direction. The injection molded part covers both sides of the second flange portion in the first direction, and the third direction is the length direction of the temperature sampling component.

10. The battery device according to claim 9, characterized in that, The angle of inclination of the second flange relative to the first extension is greater than or equal to 30 degrees and less than or equal to 60 degrees.

11. The battery device according to any one of claims 4-10, characterized in that, The injection molded part includes: The top is spaced apart from the first structural member in a second direction, which is the thickness direction of the temperature sampling component; Two ends, the ends connecting the top at both ends in the first direction, each end being injection molded over the outside of a second structural member.

12. The battery device according to claim 11, characterized in that, The injection-molded part also includes: The side portion connects the two ends and the top, and is disposed at one end of the insert in a third direction, while the injection molded part is open at the other end in the third direction.

13. The battery device according to claim 11, characterized in that, The end portion has a groove on the side away from the 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 receiving cavity in the first direction, the groove is detachably connected to the manifold component.

14. The battery device according to claim 13, characterized in that, The busbar component includes a body portion, which has a mounting groove at one end in a third direction. The injection molded part 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.

15. The battery device according to claim 14, characterized in that, The groove is provided with a first protrusion, which protrudes from the first bottom 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 bottom wall of the groove.

16. The battery device according to claim 14, characterized in that, The end portion includes two first sidewalls, which are wall surfaces of the end portion that are close to the groove and opposite each other in the second direction; each of the two first sidewalls is provided with a second protrusion that protrudes 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.

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

18. The battery device according to claim 14, 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.

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

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

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

Images