Battery device, sampling assembly and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device, a sampling assembly and a power utilization device, the battery device comprises a battery monomer assembly, a bus member and the sampling assembly, the battery monomer assembly comprises a plurality of battery monomers, and the bus member is electrically connected with the plurality of battery monomers; the sampling assembly is used for collecting state information of the battery monomers, the sampling assembly comprises a sampling cable and an adapter, the sampling cable comprises a sampling line, the adapter comprises a first connecting area and a second connecting area, the first connecting area and the second connecting area are arranged at an interval, the sampling line is connected to the first connecting area through tin soldering, and the sampling line is connected to the second connecting area through tin soldering. The bus member is fixedly connected to the second connection area, and the sampling line is electrically connected with the bus member through the adapter. According to the battery device provided by the embodiment of the invention, the manufacturing yield of the sampling assembly can be improved, and the reliability of the sampling assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery, in particular to a battery device, a sampling assembly and a power consumption device. BACKGROUND

[0002] Energy saving and emission reduction is the key to sustainable development, which promotes the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle ability, high working voltage, environmental protection and low self-discharge.

[0003] During use, the battery usually needs to use a sampling assembly to collect data of the battery, so as to monitor the working state of the battery. How to improve the reliability of the sampling assembly has always been the research direction in the industry. CONTENT OF THE INVENTION

[0004] Therefore, the embodiments of the present application provide a battery device, a sampling assembly and a power consumption device, which can improve the manufacturing yield of the sampling assembly and improve the reliability of the sampling assembly.

[0005] The embodiments of the first aspect of the present application provide a battery device, comprising:

[0006] The battery monomer assembly comprises a plurality of battery monomers;

[0007] The current collector electrically connects the plurality of battery monomers;

[0008] The sampling assembly is used to collect state information of the battery monomers, and comprises a sampling cable and an adapter. The sampling cable comprises a sampling line, and the adapter comprises a first connecting area and a second connecting area. The first connecting area is spaced apart from the second connecting area. The sampling line is connected to the first connecting area by soldering, and the current collector is fixedly connected to the second connecting area. The sampling line is electrically connected to the current collector through the adapter.

[0009] In the battery device provided by the embodiments of the present application, the sampling assembly comprises a sampling cable and an adapter. The sampling line in the sampling cable is connected to the adapter by soldering, and the adapter is fixedly connected to the current collector. Therefore, the sampling line is fixedly connected and electrically connected to the current collector through the adapter. Since the sampling line is connected to the adapter by soldering, the soldering process does not need to press the sampling line, the adapter or the current collector, which reduces the risk of false welding, improves the manufacturing yield and improves the reliability of the sampling assembly. Meanwhile, compared with the ultrasonic welding method, the soldering method does not need to use equipment to press the sampling line, which improves the welding efficiency.

[0010] In some embodiments, the connection between the sampling line and the adapter is covered with insulating glue or an insulating film.

[0011] By adopting the technical scheme, the insulating glue or the insulating film can insulate and protect the welding position of the sampling line and the adapter, and reduce the risk of short circuit caused by the contact between the sampling line and other conductive structural members.

[0012] In some embodiments, the adapter is fixedly connected to the bus member by at least one of welding, bonding, clamping, and hot riveting.

[0013] The adapter can be fixedly connected to the bus member in various ways, and the connection mode of the sampling assembly is flexible and easy to implement.

[0014] In some embodiments, the adapter is laser-welded to the bus member.

[0015] By adopting the technical scheme, laser welding has the advantages of high precision and high welding efficiency, and the structural reliability of the battery device is good.

[0016] In some embodiments, the second connection region is welded to the bus member.

[0017] By adopting the technical scheme, the adapter can be welded to the sampling line through the first connection region and welded to the bus member through the second connection region, and the two welding regions do not affect each other, facilitating welding operation.

[0018] In some embodiments, the first connection region and the second connection region are arranged at intervals along the length direction of the adapter.

[0019] By adopting the technical scheme, it is convenient to arrange the welding region, thereby facilitating welding.

[0020] In some embodiments, the bus member has a third connection region, and the electrode terminal of the battery monomer is welded to the third connection region; the third connection region is arranged staggered with the first connection region, and the third connection region is arranged staggered with the second connection region.

[0021] By adopting the technical scheme, any two of the first connection region, the second connection region, and the third connection region are arranged staggered, do not affect each other, facilitate welding operation, and improve the manufacturing yield.

[0022] In some embodiments, the bus member includes a main body portion and an extension portion, the extension portion protrudes from the main body portion toward one end of the sampling cable, the third connection region is located in the main body portion, and the second connection region is welded to the extension portion.

[0023] By adopting the above technical solution, the extension of the busbar protrudes from the end of the main body facing the sampling cable. The main body of the busbar can overlap with the electrode terminals of the battery cell for easy welding. At the same time, the extension of the busbar is closer to the sampling cable, and the sampling cable does not need to be bent too long towards the busbar, which makes it easier to connect the sampling cable to the busbar and saves parts costs.

[0024] In some embodiments, the orthographic projection of the adapter onto the busbar falls entirely on the extension.

[0025] By adopting the above technical solution, the extension can support the adapter, and the adapter does not need to be suspended, which improves the connection reliability between the adapter and the busbar; the size of the adapter is smaller than or equal to the size of the extension, so the adapter does not need to be too large, which helps to reduce the cost of the adapter.

[0026] In some embodiments, the sampling line is a copper wire and the adapter is a nickel sheet.

[0027] By adopting the above technical solution, the sampling line is a copper wire, the adapter is a nickel sheet, and the copper wire and the nickel sheet can be fixedly connected by soldering.

[0028] In some embodiments, the sampling cable is a flexible flat cable, which includes multiple mutually insulated sampling lines and an insulating plate covering the multiple sampling lines, with the ends of the sampling lines bent toward the busbar.

[0029] By adopting the above technical solution, the sampling cable is a flexible flat cable, which has the advantages of lightweight, high-density wiring and temperature resistance; the end of the sampling line is bent towards the busbar, so that the sampling line can be easily connected to the adapter and the busbar.

[0030] An embodiment of the second aspect of this application provides a sampling component for collecting state information of a battery cell assembly. The battery cell assembly includes multiple battery cells. The sampling component includes: a sampling cable, including a sampling line; and an adapter for fixedly connecting to a busbar electrically connected to the multiple battery cells. The adapter includes a first connection area and a second connection area, which are spaced apart. The sampling line is connected to the first connection area by soldering, and the second connection area is used to fixably connect to the busbar. The sampling line can be electrically connected to the busbar through the adapter.

[0031] In the sampling component provided in this application embodiment, since the sampling line is connected to the adapter via soldering, the soldering process does not require pressing the sampling line to the adapter or busbar, thus solving the problem of poor soldering caused by the sampling line not being pressed, improving manufacturing yield, and enhancing the reliability of the sampling component. Furthermore, compared to ultrasonic welding, soldering eliminates the need for equipment to press the sampling line, improving welding efficiency.

[0032] In some embodiments, the connection between the sampling line and the adapter is covered with insulating glue or an insulating film.

[0033] In some embodiments, the second connection region is used for welding with the busbar.

[0034] In some embodiments, the first connection region and the second connection region are arranged at intervals along the length direction of the adapter.

[0035] In some embodiments, the sampling line is a copper wire, and the adapter is a nickel sheet.

[0036] In some embodiments, the sampling line cable is a flexible flat cable, and the sampling line cable comprises a plurality of mutually insulated sampling lines and an insulating plate covering the plurality of sampling lines, and the end portion of the sampling line is arranged to be bent towards the busbar.

[0037] Embodiments of the third aspect of the present application provide a power-using device comprising the battery device of the first aspect or the sampling assembly of the second aspect, and the battery device is used for storing or providing electric energy.

[0038] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0040] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0041] Figure 2 is an exploded view of a battery device provided by an embodiment of the present application;

[0042] Figure 3 is an exploded view of a battery monomer provided by an embodiment of the present application;

[0043] Figure 4 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0044] Figure 5 is Figure 4 is a partial enlarged view of part A of the battery device shown in the figure;

[0045] Figure 6 is a structural schematic diagram of a sampling assembly provided by another embodiment of the present application;

[0046] Figure 7 is Figure 6 is a partial enlarged view of part B of the sampling assembly shown in the figure;

[0047] Figure 8 is Figure 7 is a schematic diagram of the sampling assembly shown in the figure in another embodiment.

[0048] The meanings of the labels in the figure are as follows:

[0049] 1000, vehicle; 100, battery device; 10, box body; 11, upper box body; 12, lower box body; 20, battery monomer assembly; 21, battery monomer; 211, shell; 212, end cover; 213, electrode assembly; 214, electrode terminal; 215, pressure relief mechanism; 30, busbar; 31, main body part; 311, third connection area; 32, extension part; 40, sampling assembly; 41, sampling cable; 411, sampling line; 412, insulating plate; 42, adapter; 421, first connection area; 422, second connection area; 43, sampling port; 44, insulating glue. DETAILED DESCRIPTION

[0050] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0051] 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 the present 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 specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of the present application, the technical terms "first", "second", etc. 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 "a plurality of" is two or more, unless otherwise explicitly specified.

[0053] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment in a manner known to those of ordinary skill in the art.

[0054] In the description of the embodiments of the present application, the term“and / or” is merely used to describe associated objects, and can represent the three conditions of three objects, for example, A and / or B can represent the three conditions of A alone, A and B, and B alone. In addition, the character“ / ” in the present application generally represents that the associated objects are in an“or” relationship.

[0055] In the description of the embodiments of the present application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0056] In the description of the embodiments of the present application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0057] In the description of the embodiments of the present application, unless otherwise specifically defined and limited, the technical terms“mounting”,“connecting”,“connecting”,“fixing” and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill 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.

[0058] If not specifically stated, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0059] If not specifically stated, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0060] During use, a battery usually needs to collect information of the battery by using a sampling assembly, so as to monitor the working state of the battery. The information of the battery includes current, voltage, temperature and other parameters that can reflect the working state of the battery. The sampling assembly sends the collected information to a battery management system. The battery management system can determine the working state of the battery according to the working parameters of the battery, so as to take measures such as power-off or pressure relief for the battery in time.

[0061] Some sampling assemblies in the related art include a flexible flat cable (FFC) for collecting data. The flexible flat cable includes an insulating plate and a plurality of sampling lines arranged in the insulating plate. The end of the sampling line extends to a corresponding busbar and is connected to the busbar by ultrasonic welding. During ultrasonic welding, the sampling line needs to be pressed against a pad first. Since the sampling line is thin, it is not easy to press the sampling line against the pad by using equipment. If ultrasonic welding is performed when the sampling line and the pad are not completely pressed, there is a risk of false welding, which is not conducive to improving the manufacturing yield and affects the reliability of the sampling assembly.

[0062] Therefore, the embodiments of the present application provide a battery device, which can improve the manufacturing yield of the sampling assembly and improve the reliability of the sampling assembly. The battery device includes a battery monomer assembly, a busbar and a sampling assembly. The sampling assembly includes a sampling cable and an adapter. The sampling cable includes a sampling line. The sampling line is connected to the adapter by soldering. The adapter is fixedly connected to the busbar. The sampling line is electrically connected to the busbar through the adapter.

[0063] In the battery device provided by the embodiments of the present application, the sampling assembly includes a sampling cable and an adapter. The sampling line in the sampling cable is connected to the adapter by soldering. The adapter is fixedly connected to the busbar. Therefore, the sampling line can be fixedly connected and electrically connected to the busbar through the adapter. Since the sampling line is connected to the adapter by soldering, the soldering process does not need to press the sampling line against the adapter or the busbar. This reduces the risk of false welding caused by incomplete pressing of the sampling line, improves the manufacturing yield and improves the reliability of the sampling assembly. Meanwhile, compared with the ultrasonic welding method, the soldering method does not need to press the sampling line by using equipment, which improves the welding efficiency.

[0064] The technical solutions described in the embodiments of the present application are suitable for a sampling assembly, a battery device including the sampling assembly and a power consumption device using the battery device.

[0065] In the embodiments of the present application, the battery monomer can be a secondary battery. The secondary battery refers to a battery monomer that can be activated by charging after discharging.

[0066] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0067] The battery apparatus disclosed by the embodiments of the present application can be used in a power consumption apparatus using the battery apparatus as a power source or a variety of energy storage systems using the battery apparatus as an energy storage element. The power consumption apparatus includes, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship, and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0068] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0069] Please refer to Figure 1 , Figure 1 A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery apparatus 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery apparatus 100 can be used for power supply of the vehicle 1000, for example, the battery apparatus 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery apparatus 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0070] In some embodiments of the present application, the battery apparatus 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0071] Reference is made to Figure 2 , Figure 2 An exploded structural schematic diagram of the battery apparatus 100 is provided for some embodiments of the present application. The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 can include a plurality of battery cells 21 connected in series, in parallel, or in a mixed connection mode by a busbar.

[0072] In some embodiments, the plurality of battery cells 21 in the battery device 100 can be electrically connected by busbars to achieve parallel, series or mixed connection of the plurality of battery cells 21 in the battery device 100.

[0073] In some embodiments, the battery cell assembly 20 is generally formed by arranging a plurality of battery cells 21; as an example, the battery cell assembly 20 can be a battery module formed by arranging and fixing a plurality of battery cells 21 into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 21 by a cable tie.

[0074] In some embodiments, the battery device 100 can be a battery pack, which includes the box 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being accommodated in the box 10.

[0075] As an example, the battery cell assembly 20 can be a battery module, which can be accommodated in the box 10 by fixing the battery module in the box 10.

[0076] As an example, the battery cell assembly 20 can also be accommodated in the box 10 by fixing a plurality of battery cells 21 directly in the box 10.

[0077] As an example, the box 10 can include an upper box 11 and a lower box 12. The upper box 11 and the lower box 12 are buckled so that a closed accommodation cavity is formed inside the box 10 to accommodate the battery cell assembly 20. Here, closed means covered or closed, which can be sealed or unsealed.

[0078] As an example, the box 10 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that a closed accommodation cavity is formed inside the box 10 to accommodate the battery cell assembly 20.

[0079] As an example, the box 10 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the box 10 can be at least part of the floor of the vehicle 1000, or the frame of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0080] In some embodiments, the battery device 100 refers to an energy storage device, which includes the box 10, at least one side of the box 10 being provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0081] Please refer to Figure 3 The battery cell 21 is the smallest unit of the battery device, which includes a shell 211, an end cover 212, an electrode assembly 213 and other functional components.

[0082] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Optionally, the end cover 212 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 212 is less likely to deform when subjected to extrusion collision, allowing the battery cell 21 to have higher structural strength and improved use reliability. The end cover 212 can be provided with functional components such as the electrode terminal 214 and the pressure relief mechanism 215. The electrode terminal 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the pressure relief mechanism 215 is used to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. The material of the end cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 212 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0083] The shell 211 is a component used to fit the end cover 212 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte and other components. The shell 211 and the end cover 212 can be independent components, and an opening can be provided on the shell 211, and the end cover 212 is covered on the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the shell 211 can also be integrated, specifically, the end cover 212 and the shell 211 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 211, the end cover 212 is covered on the shell 211. The shell 211 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0084] The electrode assembly 213 is a component in which electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 can be contained within the casing 211. The electrode assembly 213 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 213, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery device 100, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs connect the electrode terminal 214 to form a current loop. In some embodiments, the battery cell 21 is provided with a pressure relief mechanism 215 on one side, which refers to an element or component that is actuated to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold.

[0085] Please refer to Figure 2 to Figure 8 , the first aspect of the embodiments of the present application proposes a battery device 100, the battery device 100 includes a battery cell assembly 20, a busbar 30 and a sampling assembly 40, the battery cell assembly 20 includes a plurality of battery cells 21, the busbar 30 is electrically connected with the plurality of battery cells 21, the sampling assembly 40 is used for collecting state information of the battery cell 21, the sampling assembly 40 includes a sampling cable 41 and an adapter 42, the sampling cable 41 includes a sampling line 411, the sampling line 411 is connected to the adapter 42 by soldering, and the adapter 42 is fixedly connected to the busbar 30, the sampling line 411 is electrically connected with the busbar 30 through the adapter 42.

[0086] In some embodiments, the adapter 42 includes a first connection region 421 and a second connection region 422, the first connection region 421 and the second connection region 422 are arranged at intervals, the sampling line 411 is connected to the first connection region 421 by soldering, and the busbar 30 is fixedly connected to the second connection region 422.

[0087] In some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21 arranged in a first direction X in turn, and the first direction X can be the length direction of the box body 10. In other embodiments, the first direction X can also be the width direction of the box body 10, or the first direction X is a direction intersecting both the length direction and the width direction of the box body 10.

[0088] The number of battery cell assemblies 20 can be one or more, when the number of battery cell assemblies 20 is multiple, the plurality of battery cell assemblies 20 can be arranged in a row along the first direction X, and the plurality of battery cell assemblies 20 can also be arranged in multiple columns along a second direction Y intersecting the first direction X, so that the battery cells 21 are arranged in an array.

[0089] The number of the busbars 30 can be one or more, and each busbar 30 electrically connects at least two battery monomers 21. Optionally, the busbar 30 is used to electrically connect two adjacent battery monomers 21. Optionally, the busbar 30 can be an aluminum bar.

[0090] In some embodiments, the busbar 30 electrically connects the electrode terminals 214 of two battery monomers 21, and the series connection or the parallel connection of different battery monomers 21 can be achieved through the busbar 30. Optionally, the busbar 30 can connect the electrode terminals 214 of two battery monomers 21 with the same polarity, so as to achieve the parallel connection of the battery monomers 21, or the busbar 30 can connect the electrode terminals 214 of two battery monomers 21 with different polarities, so as to achieve the series connection of the battery monomers 21.

[0091] The sampling assembly 40 includes a sampling cable 41 and an adapter 42. The sampling cable 41 can have a flat shape, a sheet shape or other shapes, and the sampling cable 41 includes one or more sampling lines 411, which can be metal lines, such as copper lines.

[0092] The number of the adapters 42 can also be one or more. When the number of the adapters 42 is more than one, different adapters 42 can be connected to different sampling lines 411.

[0093] The adapter 42 is used to fixedly connect the sampling line 411 with the busbar 30 and electrically conduct the sampling line 411 with the busbar 30.

[0094] The sampling line 411 is connected to the adapter 42 through soldering. The core of the soldering connection is to use solder with a melting point lower than 450°C as a filler metal, which is melted at a temperature lower than the melting point of the base metal (the connected metal), wets the surface of the base metal, fills the gap between the joints, and diffuses with the base metal, and forms a firm electrical and mechanical connection after cooling. The soldering connection can provide excellent electrical conductivity and sufficient mechanical strength, and the equipment and materials are relatively cheap; compared with the ultrasonic welding method, the soldering connection does not need to press the sampling line 411, has high welding efficiency and small risk of false welding, and is beneficial to improve the welding yield.

[0095] The adapter 42 can be fixedly connected to the busbar 30 through welding, bonding, clamping or the like. In this way, the sampling line 411 can be fixedly connected to the busbar 30 through the adapter 42.

[0096] During assembly, the busbar 30 can be fixedly connected to the battery monomer assembly 20, the adapter 42 is soldered with the sampling line 411, and then the sampling assembly 40 is placed above the battery monomer assembly 20, and the adapter 42 is fixedly connected to the busbar 30. It can be understood that the assembly sequence is not limited thereto.

[0097] The sampling method of the battery device 100 is as follows: since the busbar 30 is electrically connected to the plurality of battery cells 21, and the sampling line 411 is electrically connected to the busbar 30 through the adapter 42, the sampling line 411 can collect the state information of the battery cells 21 through the busbar 30, and the state information includes at least one of the current, voltage, temperature and other information of the battery cells 21.

[0098] In the battery device 100 provided by the embodiments of the present application, the sampling assembly 40 includes the sampling cable 41 and the adapter 42, the sampling line 411 in the sampling cable 41 is connected to the adapter 42 through soldering, and the adapter 42 is fixedly connected to the busbar 30, so that the sampling line 411 is fixedly connected and electrically connected to the busbar 30 through the adapter 42. Since the sampling line 411 is connected to the adapter 42 through soldering, the soldering process does not need to press the sampling line 411, the adapter 42 or the busbar 30, thereby reducing the risk of false welding, improving the manufacturing yield, and improving the reliability of the sampling assembly 40. At the same time, compared with the ultrasonic welding method, the soldering method does not need to use equipment to press the sampling line 411, thereby improving the welding efficiency.

[0099] Please refer to Figure 4 、 Figure 6 to Figure 8 In some embodiments, the connection between the sampling line 411 and the adapter 42 is covered with insulating glue 44 or an insulating film.

[0100] The material of the insulating glue 44 can be an insulating glue such as epoxy resin glue, and the insulating glue 44 can be applied to the connection between the sampling line 411 and the adapter 42 by a dot coating method. For example, Figure 8 The dot coating range of the insulating glue 44 is shown.

[0101] The insulating film can be a polyimide (PI) film, a polyester (PET) film, etc. Optionally, the sampling assembly 40 includes a plurality of sampling lines 411 and a plurality of adapters 42, and each connection between the sampling line 411 and the adapter 42 is covered with another insulating film; optionally, the sampling assembly 40 includes a strip-shaped insulating film, and the insulating film covers the connections between the plurality of sampling lines 411 and the corresponding adapters 42 at the same time, so as to improve the manufacturing efficiency.

[0102] Optionally, the adapter 42 is located above the busbar, and the sampling line 411 is located above the adapter 42, that is, along the height direction of the battery cell 21, the adapter 42 is located between the busbar 30 and the sampling line 411, and the insulating glue 44 or the insulating film can cover the exposed sampling line 411.

[0103] By using the above technical solution, the insulating glue 44 or the insulating film can have an insulating protection effect on the welding position of the sampling line 411 and the adapter 42, thereby reducing the risk of short circuit caused by the contact between the sampling line 411 and other conductive structural members.

[0104] Please refer to Figure 4 to Figure 8 In some embodiments, the adapter 42 is fixedly connected to the busbar 30 by at least one of welding, bonding, clamping, and hot riveting.

[0105] In some embodiments, the adapter 42 is connected to the busbar 30 by laser welding or ultrasonic welding. After welding, the adapter 42 and the busbar 30 can be further glued to improve the connection reliability of the adapter 42 and the busbar 30.

[0106] The adapter 42 can be fixedly connected to the busbar 30 in various ways, and the connection mode of the sampling assembly 40 is flexible and easy to implement.

[0107] Please refer to Figure 4 to Figure 7 In some embodiments, the adapter 42 is laser welded to the busbar 30.

[0108] Optionally, the adapter 42 is a nickel sheet, and the busbar 30 is an aluminum bar. The nickel sheet and the aluminum bar are suitable for laser welding to achieve interconnection, and the molten pool depth consistency is good. The adapter 42 and / or the busbar 30 can also be other materials suitable for laser welding.

[0109] By using the above technical solution, the adapter 42 is laser welded to the busbar 30. Laser welding has the advantages of high precision and high welding efficiency, and the structural reliability of the battery device 100 is good.

[0110] Please refer to Figure 6 and Figure 7 In some embodiments, the adapter 42 includes a first connection region 421 and a second connection region 422. The sampling line 411 is welded to the first connection region 421, and the second connection region 422 is welded to the busbar 30. The first connection region 421 and the second connection region 422 are spaced apart.

[0111] The adapter 42 includes a first connection region 421 and a second connection region 422. The first connection region 421 is a region for welding the sampling line 411, and the second connection region 422 is a region for welding the busbar 30. For example, Figure 7 The regions shown in the two dashed boxes are the first connection region 421 and the second connection region 422. As shown in Figure 7 The first connection region 421 and the second connection region 422 are spaced apart, so that the welding connection between the sampling line 411 and the adapter 42 is spaced apart from the welding connection between the adapter 42 and the busbar 30, and they do not affect each other.

[0112] By spacing the first connecting region 421 and the second connecting region 422, the adapter 42 can be welded to the sampling line 411 through the first connecting region 421 and welded to the busbar 30 through the second connecting region 422, and the two welding regions do not affect each other, facilitating welding operation.

[0113] Please continue to refer to Figure 6 and Figure 7 In some embodiments, the first connecting region 421 and the second connecting region 422 are spaced along the length direction of the adapter 42.

[0114] The adapter 42 can be a rectangular sheet, and the first connecting region 421 and the second connecting region 422 are spaced along the length direction of the adapter 42, facilitating the arrangement of the welding region and thus facilitating welding.

[0115] Please refer to Figure 4 to Figure 7 In some embodiments, the busbar 30 has a third connecting region 311, and the electrode terminal 214 of the battery monomer 21 is welded to the third connecting region 311; the third connecting region 311 is arranged staggered with the first connecting region 421, and the third connecting region 311 is arranged staggered with the second connecting region 422.

[0116] The busbar 30 electrically connects the electrode terminals 214 of at least two battery monomers 21, and the electrode terminals 214 of the at least two battery monomers 21 are welded to the third connecting region 311. It can be understood that the electrode terminals 214 of the at least two battery monomers 21 are arranged staggered in the third connecting region 311. For example, the third connecting region 311 of the busbar 30 includes two sub-welding regions arranged spaced apart, and each sub-welding region is used for welding an electrode terminal 214 of a battery monomer 21.

[0117] Any two of the first connecting region 421, the second connecting region 422 and the third connecting region 311 are arranged staggered. For example, the adapter 42 is located at one end of the busbar 30, and the third connecting region 311 is located at the other end of the busbar 30. Then, the first connecting region 421 is arranged staggered with the third connecting region 311, and the second connecting region 422 is also arranged staggered with the third connecting region 311.

[0118] By using the above technical solution, any two of the first connecting region 421, the second connecting region 422 and the third connecting region 311 are arranged staggered, and do not affect each other, facilitating welding operation and improving manufacturing yield.

[0119] Please refer to Figure 6 and Figure 7In some embodiments, the busbar 30 comprises a main body portion 31 and an extension portion 32, the extension portion 32 protrudes from the main body portion 31 towards one end of the sampling cable 41, the third connection region 311 is located on the main body portion 31, and the second connection region 422 is welded on the extension portion 32.

[0120] Optionally, the main body portion 31 is rectangular or substantially rectangular, and the extension portion 32 protrudes from one sub-welding region towards one end of the sampling cable 41, and the extension portion 32 can also be rectangular or substantially rectangular. In the present embodiment, the sampling cable 41 extends along a first direction X, and the extension portion 32 protrudes from one end of the main body portion 31 along a second direction Y, which is perpendicular to the first direction. Optionally, the extension portion 32 has a dimension along the first direction X smaller than that of the main body portion 31 along the first direction.

[0121] It can be understood that the main body portion 31 and the extension portion 32 can also have other shapes. The third connection region 311 is located on the main body portion 31, and the main body portion 31 is arranged to overlap the electrode terminal 214 of the battery monomer 21, so as to facilitate the welding of the electrode terminal 214 to the third connection region 311. The second connection region 422 of the adapter piece is welded on the extension portion 32. Since the extension portion 32 is located at one end of the main body portion 31 close to the sampling cable 41, the sampling line 411 does not need to be bent for too long to be connected to the adapter piece 42 and the extension portion 32.

[0122] By adopting the above technical solution, the extension portion 32 of the busbar 30 protrudes from the main body portion 31 towards one end of the sampling cable 41, the main body portion 31 of the busbar 30 can be arranged to overlap the electrode terminal 214 of the battery monomer 21 to facilitate welding, at the same time, the extension portion 32 of the busbar 30 is closer to the sampling cable 41, the sampling line 411 does not need to be bent for too long towards the busbar 30, which facilitates the connection of the sampling line 411 to the busbar 30, and saves the cost of parts.

[0123] In some embodiments, the orthographic projection of the adapter piece 42 on the busbar 30 completely falls on the extension portion 32.

[0124] The adapter piece 42 is arranged in layers with the extension portion 32, and the orthographic projection of the adapter piece 42 on the busbar 30 completely falls on the extension portion 32. On the one hand, the extension portion 32 can bear the adapter piece 42, and the adapter piece 42 does not need to be suspended, which improves the connection reliability of the adapter piece 42 and the busbar 30. On the other hand, the size of the adapter piece 42 is smaller than or equal to that of the extension portion 32, and the adapter piece 42 does not need to be arranged to have an excessively large size, which is conducive to reducing the cost of the adapter piece 42.

[0125] In some embodiments, the sampling line 411 is a copper wire, and the adapter piece 42 is a nickel sheet.

[0126] By adopting the technical scheme, the sampling line 411 is a copper wire, and the adapter piece 42 is a nickel sheet, so the copper wire and the nickel sheet can be fixedly connected through tin soldering.

[0127] In other embodiments, the sampling line 411 can also be a tinned copper wire or other conductive wire.

[0128] In other embodiments, the adapter piece can be a stainless steel sheet or a conductive sheet of other materials.

[0129] In some embodiments, the sampling cable 41 is a flexible flat cable, the sampling cable 41 includes a plurality of sampling lines 411 insulated from each other and an insulating plate 412 covering the plurality of sampling lines 411, and the end of the sampling line 411 is arranged to be bent towards the busbar 30.

[0130] The sampling cable 41 is a flexible flat cable (FFC), and the insulating plate 412 can include two layers of insulating film layers arranged on opposite sides of the plurality of sampling lines 411 to insulate and protect the plurality of sampling lines 411. The plurality of sampling lines 411 are arranged side by side and insulated, and the plurality of sampling lines 411 are connected to different busbars 30. In this embodiment, the sampling line 411 extends along the first direction X, and the plurality of sampling lines 411 are arranged at intervals along the second direction Y. Optionally, the number of adapter pieces 42 is multiple, and one row of adapter pieces 42 is arranged on each side of the sampling cable 41 along the width direction (the second direction Y) of the sampling cable 41, and the multiple adapter pieces 42 in each row are arranged at intervals along the first direction X. The sampling cable 41 is connected to two rows of busbars 30 through the two rows of adapter pieces 42, so that the sampling assembly 40 can sample at least two rows of battery monomers 21, and the sampling assembly 40 has the advantages of compact structure and small space occupation.

[0131] The end of the sampling line 411 is arranged to be bent towards the busbar 30, and the end of the sampling line 411 is exposed outside the insulating plate 412, so as to facilitate the welding of the end of the sampling line 411 to the adapter piece 42.

[0132] In the sampling assembly 40 provided by the embodiments of the present application, the sampling cable 41 is a flexible flat cable, which has the advantages of lightweight, high-density wiring, and temperature resistance; the end of the sampling line 411 is arranged to be bent towards the busbar 30, so that the sampling line 411 can be conveniently connected to the adapter piece 42 and the busbar 30.

[0133] As Figure 4As shown, the sampling assembly 40 further includes a sampling port 43 at one end of the sampling cable 41, the sampling port is electrically connected with the sampling cable 41, and the state information collected by the sampling cable 41 can be outputted to outside through the sampling port 43. For example, the sampling port 43 is further used for connecting a battery management system, so as to electrically connect the sampling cable 41 with the battery management system, and thus the sampling cable 41 can output the collected state information to the battery management system.

[0134] Please refer to Figure 2 to Figure 8 Some embodiments of the present application provide a battery device 100, comprising a battery cell assembly 20, a busbar 30 and a sampling assembly 40, the battery cell assembly 20 comprises a plurality of battery cells 21, the sampling assembly 40 comprises a sampling cable 41 and an adapter 42, and the busbar 30 electrically connects the plurality of battery cells 21; the sampling assembly 40 is used for collecting state information of the battery cells 21, the sampling assembly 40 comprises the sampling cable 41 and the adapter 42, the sampling cable 41 comprises a sampling wire 411, the sampling wire 411 is fixedly connected to the busbar 30 through the adapter 42, and the sampling wire 411 is electrically connected with the busbar 30 through the adapter 42, wherein the sampling wire 411 is connected to the adapter 42 through soldering, and the adapter 42 is fixedly connected to the busbar 30 through laser welding; the adapter 42 comprises a first connecting area 421 and a second connecting area 422, the sampling wire 411 is welded to the first connecting area 421, the second connecting area 422 is welded to the busbar 30, and the first connecting area 421 and the second connecting area 422 are arranged in a spaced manner; the sampling wire 411 is a copper wire, and the adapter 42 is a nickel sheet.

[0135] In the battery device 100 provided by the embodiments of the present application, the sampling wire 411 in the sampling cable 41 is connected to the adapter 42 through soldering, and the adapter 42 is fixedly connected to the busbar 30 through laser, so that the sampling wire 411 can be fixedly connected and electrically connected to the busbar 30 through the adapter 42, without the need to directly connect the sampling wire 411 to the busbar 30 by ultrasonic welding, thereby solving the problem of virtual welding caused by the non-pressing of the sampling wire 411, reducing the risk of missing welding, improving the manufacturing yield, improving the reliability of the sampling assembly 40, and improving the welding efficiency.

[0136] The second aspect of the present application provides a sampling assembly 40, which is the sampling assembly 40 in the battery device 100 provided by the first aspect of the embodiments.

[0137] In some embodiments, the sampling assembly 40 is configured to collect state information of the battery monomer assembly 20, the battery monomer assembly 20 includes a plurality of battery monomers 21, the sampling assembly 40 includes a sampling cable 41 and an adapter 42, the sampling cable 41 includes a sampling wire 411, the sampling wire 411 is connected to the adapter 42 by soldering, and the adapter 42 is fixedly connected to the busbar 30 electrically connected to the plurality of battery monomers 21, and the sampling wire 411 can be electrically connected to the busbar 30 through the adapter 42.

[0138] In some embodiments, the adapter 42 includes a first connection region 421 and a second connection region 422, the sampling wire 411 is connected to the first connection region 421 by soldering, and the busbar 30 is fixedly connected to the second connection region 422.

[0139] The sampling assembly 40 provided by the embodiments of the present application includes the sampling cable 41 and the adapter 42, the sampling wire 411 is connected to the adapter 42 by soldering, and the adapter 42 is fixedly connected to the busbar 30 electrically connected to the plurality of battery monomers 21, so that the sampling wire 411 is fixedly connected to and electrically connected to the busbar 30 through the adapter 42, without the need to directly connect the sampling wire 411 to the busbar 30 by ultrasonic welding, thereby reducing the risk of false welding, reducing the risk of missed welding, improving the manufacturing yield, improving the reliability of the sampling assembly 40, and improving the welding efficiency.

[0140] The third aspect of the present application provides a power-using device, including the battery device of the first aspect or the sampling assembly of the second aspect, and the battery device is configured to provide power for the power-using device.

[0141] The power-using device can be a device or system of any of the foregoing applications of the battery device.

[0142] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery monomer assembly comprises a plurality of battery monomers. The battery monomer assembly comprises a plurality of battery monomers. The sampling assembly comprises a sampling cable and an adapter, the sampling cable comprises a sampling wire, and the adapter comprises a first connecting area and a second connecting area. The connection between the sampling wire and the adapter is covered with insulating glue or an insulating film.

2. The battery device of claim 1, wherein The adapter is fixedly connected to the busbar by at least one of welding, bonding, clamping, and hot riveting.

3. The battery device of claim 1, wherein The adapter is laser-welded to the busbar.

4. The battery device of claim 3, wherein The second connecting area is welded to the busbar.

5. The battery device of claim 4, wherein The first connecting area and the second connecting area are spaced apart along the length direction of the adapter.

6. The battery device of claim 5, wherein The busbar has a third connecting area, and the electrode terminal of the battery monomer is welded to the third connecting area.

7. The battery device of claim 5, wherein The third connecting area is offset from the first connecting area, and the third connecting area is offset from the second connecting area. The busbar comprises a main body and an extension, the extension protrudes from the main body towards one end of the sampling cable, the third connecting area is located in the main body, and the second connecting area is welded to the extension.

8. The battery device of claim 7, wherein The adapter is completely projected on the extension on the busbar.

9. The battery device of claim 8, wherein, The sampling wire is a copper wire, and the adapter is a nickel sheet.

10. The battery device of any one of claims 1-9, wherein, The sampling cable is a flexible flat cable, the sampling cable comprises a plurality of mutually insulated sampling wires and an insulating plate covering the plurality of sampling wires, and the end of the sampling wire is bent towards the busbar.

11. The battery device of any one of claims 1-9, wherein, The sampling assembly is used to collect the state information of the battery monomer assembly, the battery monomer assembly comprises a plurality of battery monomers, and the sampling assembly comprises:

12. A sampling assembly comprising: A sampling cable comprising a sampling wire; An adapter fixedly connected to a busbar electrically connected to a plurality of battery monomers, the adapter comprises a first connecting area and a second connecting area, the first connecting area is spaced apart from the second connecting area, the sampling wire is connected to the first connecting area by soldering, the second connecting area is used for fixedly connecting the busbar, and the sampling wire can be electrically connected to the busbar through the adapter. The connection between the sampling wire and the adapter is covered with insulating glue or an insulating film.

13. The sampling assembly of claim 12, wherein, The second connecting area is used for welding to the busbar.

14. The sampling assembly of claim 12, wherein, The first connecting area and the second connecting area are spaced apart along the length direction of the adapter.

15. The sampling assembly of claim 14, wherein, The sampling wire is a copper wire, and the adapter is a nickel sheet.

16. The sampling assembly of any one of claims 12-15, wherein, The sampling cable is a flexible flat cable, the sampling cable comprises a plurality of mutually insulated sampling wires and an insulating plate covering the plurality of sampling wires, and the end of the sampling wire is bent towards the busbar.

17. The sampling assembly of any one of claims 12-15, wherein, ​ 18. An electrical device, comprising: A battery device as claimed in any one of claims 1-11 or a sampling assembly as claimed in any one of claims 12-17, for storing or providing electrical energy.

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