Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, the battery device comprises a plurality of battery monomers (1), a busbar (2) and a sampling assembly (3), the plurality of battery monomers (1) are used for providing electric energy, the busbar (2) is used for realizing electric connection of the plurality of battery monomers (1), the sampling assembly (3) is arranged between the battery monomers (1) and the busbar (2), and the sampling assembly (3) is arranged between the plurality of battery monomers (1) and the busbar (2). And the single battery body (1), the busbar (2) and the sampling assembly (3) are constructed to be connected through one-time welding. The electric equipment comprises a battery device. The manufacturing efficiency of the battery device can be effectively improved, and the investment cost is reduced.

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] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] During the manufacturing process of the battery, multiple connections between multiple components are involved, and the operation is very complex.

[0004] The above statements are only used to provide background technical information related to the present application, and do not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a battery device and an electric equipment, which can effectively simplify the operation steps in the manufacturing process of the battery device.

[0006] In a first aspect, the present application provides a battery device, comprising:

[0007] a plurality of battery monomers for providing electric energy;

[0008] a bus bar for realizing the electrical connection of the plurality of battery monomers; and

[0009] a sampling assembly arranged between the battery monomer and the bus bar, and the battery monomer, the bus bar and the sampling assembly are configured to be connected by one-time welding.

[0010] By configuring the battery monomer, the bus bar and the sampling assembly to be connected by one-time welding, the welding connection between the battery monomer, the bus bar and the sampling assembly can be realized by one-time welding. Compared with the related art which requires two-time welding to complete, the present application can reduce the number of welding, simplify the operation steps in the manufacturing process, thereby effectively improving the manufacturing efficiency of the battery device; it can also reduce the number of welding equipment, reduce the investment cost, and reduce the floor area of the manufacturing equipment, which is conducive to incremental expansion.

[0011] In some embodiments, the battery monomer includes a pole, and the pole, the bus bar and the sampling assembly are configured to be connected by one-time welding.

[0012] In this embodiment, the pole serves as the current output end or input end of the battery monomer, and by connecting the bus bar and the sampling assembly to the pole of the battery monomer, the purpose of electrically connecting the plurality of battery monomers through the bus bar can be effectively achieved.

[0013] In some embodiments, the sampling assembly is provided with a first through hole, the battery monomer is provided with a first protruding part, and the sampling assembly is sleeved on the first protruding part through the first through hole.

[0014] By providing the first through hole on the sampling assembly and the first protruding part on the battery monomer, the sampling assembly can be sleeved on the first protruding part through the first through hole, so as to realize the positioning and connection of the sampling assembly and the battery monomer, and effectively ensure the relative fixation between the sampling assembly and the battery monomer.

[0015] By adopting the cooperation mode of the first through hole and the first protruding part, the relative fixation between the sampling assembly and the battery monomer can be realized, and the positioning and alignment during the sleeving process of the sampling assembly and the battery monomer can be facilitated.

[0016] In some embodiments, the battery device further comprises a support, the support is mounted on the battery monomer, and the sampling assembly is mounted on the support.

[0017] By providing the support, the sampling assembly can be mounted on the support, so that the battery monomer can be effectively protected by the support to prevent damage to the battery monomer.

[0018] In some embodiments, the sampling assembly is provided with a second through hole, the support is provided with a second protruding part, and the sampling assembly is sleeved on the second protruding part through the second through hole.

[0019] By providing the second through hole on the sampling assembly and the second protruding part on the support, the sampling assembly can be sleeved on the second protruding part through the second through hole, so as to realize the positioning and connection of the sampling assembly and the support, and effectively ensure the relative fixation between the sampling assembly and the support.

[0020] By adopting the cooperation mode of the second through hole and the second protruding part, the relative fixation between the sampling assembly and the support can be realized, and the positioning and alignment during the sleeving process of the sampling assembly and the support can be facilitated.

[0021] In some embodiments, the support is provided with a third through hole, the battery monomer is provided with a third protruding part, and the support is sleeved on the third protruding part through the third through hole.

[0022] By providing the third through hole on the support and the third protruding part on the battery monomer, the support can be sleeved on the third protruding part through the third through hole, so as to realize the positioning and connection of the support and the battery monomer, and effectively ensure the relative fixation between the support and the battery monomer.

[0023] By adopting the cooperation mode of the third through hole and the third protruding part, the relative fixation between the support and the battery monomer can be realized, and the positioning and alignment during the sleeving process of the support and the battery monomer can be facilitated.

[0024] In some embodiments, the sampling assembly comprises a carrier, a connecting piece and a sampling line, the connecting piece is mounted on the carrier, and the sampling line and the battery cell are electrically connected through the connecting piece.

[0025] By arranging the carrier, the connecting piece and the sampling line can be carried. Especially when the number of connecting pieces and sampling lines is large, the carrier can fix the connecting pieces and the sampling lines relatively.

[0026] In some embodiments, the carrier is made of plastic material. The plastic material has good hardness and can provide good support under the same thickness.

[0027] In some embodiments, the sampling line comprises a main body segment and a backfolding segment which is bent relative to the extension direction of the main body segment.

[0028] By arranging the backfolding segment, the length of the sampling line can be increased, thereby increasing the resistance of the sampling line to the pulling force caused by the thermal expansion of the battery cell. This effectively prevents the sampling line from being pulled and broken due to the thermal expansion of the battery cell, effectively protects the safety of the sampling line, and further ensures the effectiveness of the sampling. This is also conducive to improving the service life of the battery device.

[0029] In some embodiments, the length of the backfolding segment is 2mm-10mm.

[0030] The length of the backfolding segment is set to 2mm-10mm, such as 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm. This can not only make the backfolding segment have good resistance to the pulling force caused by the thermal expansion of the battery cell, but also facilitate the arrangement and fixation of the backfolding segment.

[0031] In some embodiments, the thickness of the connecting piece is 0.2mm-1mm.

[0032] The thickness of the connecting piece is set to 0.2mm-1mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm. This can not only make the connecting piece have good electrical connection performance, but also enable the welding laser to penetrate the connecting piece to reach the battery cell, thereby realizing one-time welding connection of the bus bar, the sampling assembly and the battery cell.

[0033] In some embodiments, the thickness of the bus bar is 0.8mm-3mm.

[0034] The thickness of the bus bar is set to 0.8mm-3mm, such as 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm. This can not only make the bus bar have good strength, but also make the bus bar have good electrical connection performance.

[0035] In a second aspect, the present application provides a power consuming device comprising the battery device as described above, the battery device being configured to supply power to the power consuming device.

[0036] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application will be described. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the drawings.

[0038] Figure 1 is a structural schematic diagram of some embodiments of the power consuming device disclosed by the present application.

[0039] Figure 2 is a structural schematic diagram of some embodiments of the battery device disclosed by the present application.

[0040] Figure 3 is a partial structural schematic diagram of some embodiments of the battery device disclosed by the present application.

[0041] Figure 4 is an exploded view of some embodiments of the battery device disclosed by the present application.

[0042] Figure 5 is an exploded view of the sampling assembly in some embodiments of the battery device disclosed by the present application.

[0043] Figure 6 is a structural schematic diagram of some embodiments of the battery device disclosed by the present application and a local enlarged view thereof.

[0044] Figure 7 is a structural schematic diagram of the support in some embodiments of the battery device disclosed by the present application.

[0045] Figure 8 is a top view of some embodiments of the battery device disclosed by the present application and a local enlarged view thereof.

[0046] In the drawings, the drawings are not drawn according to the actual scale.

[0047] Label explanation:

[0048] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, case; 101, first cover; 102, second cover;

[0049] 1, battery cell; 11, pole; 12, first protruding part; 13, third protruding part; 2, busbar; 3, sampling assembly; 31, carrier; 311, first through hole; 312, second through hole; 32, connecting piece; 33, sampling line; 331, main body segment; 332, backfolding segment; 4, bracket; 41, second protruding part; 42, third through hole. DETAILED DESCRIPTION

[0050] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme 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 this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and the claims and the above description of drawings are intended to cover the inclusion not the exclusion of one or more elements.

[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 addition, the term "vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0053] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative 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.

[0054] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0055] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly specified and limited. Similarly, "a plurality of groups" refers to two or more groups, and "a plurality of pieces" refers to two or more pieces, unless otherwise explicitly specified and limited.

[0056] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 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 explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; 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.

[0058] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0059] With the continuous expansion of market demand, the manufacturing efficiency of the battery is also required to be higher and higher. In the process of manufacturing the battery, multiple connections between multiple connecting components will be involved, and the complexity of the connection operation will directly reduce the manufacturing efficiency of the battery.

[0060] For example, when a plurality of battery monomers need to be sampled and detected, the connection between the bus bar, the sampling assembly and the plurality of battery monomers usually includes two steps: one is to weld the bus bar and the sampling assembly, and the other is to weld the sampling assembly and the battery monomer. Therefore, for the connection of the sampling assembly, two weldings are required, and the manufacturing plant needs to be equipped with two sets of laser welding equipment, which requires huge investment and occupies a large area of land, increasing the cost and being not conducive to expansion.

[0061] To this end, the structure of the battery device is modified so that the bus bar, the sampling assembly and the battery monomer can be connected by one-time welding.

[0062] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0063] The battery device disclosed in the embodiments of the present application can be used in an electric device such as a vehicle, a ship or an aircraft, but is not limited thereto. A power supply system of the electric device can be composed of the battery device disclosed in the present application, so that the operation steps of the battery device manufacturing process can be effectively simplified, thereby effectively improving the manufacturing efficiency of the battery device, meeting the increasing demand, and reducing the cost and the floor area of the manufacturing equipment.

[0064] The embodiments of the present application provide an electric device using a battery as a power supply, and the battery is configured to provide electric energy to the electric device. The electric device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy and an electric tool, etc. For example, 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 aircraft toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, such as a power drill, a power grinder, a power wrench, a power screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer.

[0065] The following examples are described for convenience with a vehicle 1000 as an example of an electric device of an embodiment of the present application.

[0066] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided in some embodiments of the present application is shown in the structural schematic diagram. The vehicle 1000 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 vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the battery device 100 is used to provide electric energy for the operation of the motor 300 and other components in the vehicle, and the controller 200 is used to control the operation of the motor 300, for example, for the electric demand of the vehicle 1000 during starting, navigation and driving.

[0067] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 provided in some embodiments of the present application is shown in FIG. 1. The battery device 100 includes a box body 10 and a plurality of battery cells 1 accommodated in the box body 10. The box body 10 is configured to provide an accommodation space for the battery cells 1, and can have various structures. In some embodiments, the box body 10 can include a first cover 101 and a second cover 102, and the first cover 101 and the second cover 102 are coupled to each other to define an accommodation space for accommodating the battery cells 1. The second cover 102 can have a hollow structure with one open end, and the first cover 101 can have a plate structure and is coupled to the open end of the second cover 102 to define the accommodation space together with the second cover 102. Alternatively, the first cover 101 and the second cover 102 can both have a hollow structure with one open end, and the open end of the first cover 101 is coupled to the open end of the second cover 102. Of course, the box body 10 formed by the first cover 101 and the second cover 102 can have various shapes, such as a cylindrical shape, a cuboid shape, etc.

[0069] In the battery device 100, the plurality of battery cells 1 can be connected in series, in parallel, or in a mixed connection manner. The mixed connection manner means that the plurality of battery cells 1 are connected in series and in parallel. The plurality of battery cells 1 can be directly connected in series, in parallel, or in a mixed connection manner, and then the plurality of battery cells 1 are accommodated in the box body 10. Alternatively, the plurality of battery cells 1 can be first connected in series, in parallel, or in a mixed connection manner to form a plurality of battery modules, and then the plurality of battery modules are connected in series, in parallel, or in a mixed connection manner to form a whole and are accommodated in the box body 10. The battery device 100 can further include other structures, for example, the battery device 100 can further include a current collecting component for electrically connecting the plurality of battery cells 1.

[0070] The battery cells 1 can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc. The battery cells 1 can have various shapes, such as a cylindrical shape, a flat shape, a cuboid shape, etc. The battery cells 1 can be generally classified into three types according to the packaging manner, i.e., a cylindrical battery cell, a square battery cell, and a soft package battery cell.

[0071] In some embodiments, the battery device 100 can include a box and a battery module, the box being configured to provide a housing space for the battery module, and the battery module being installed in the box. The box can be made of metal. The battery module can include a plurality of battery cells connected in series, in parallel, or in a mixed connection. The battery cell is the smallest unit of a battery. The battery cell includes an electrode assembly capable of electrochemical reaction.

[0072] In some embodiments, the battery can include a box and a battery cell, and the battery cell is housed in the box.

[0073] In some embodiments, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0074] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0075] The battery cells 1 are electrically connected to each other, such as in series, in parallel, or in a mixed connection, to achieve the required electrical performance parameters of the battery device 100. The mixed connection means that there are both series and parallel connections among the plurality of battery cells 1. The adjacent battery cells 1 can be electrically connected through the busbar 2. The plurality of battery cells 1 are arranged in rows, and one or more rows of battery cells 1 can be arranged in the box as needed.

[0076] In some embodiments, the battery cells 1 of the battery device 100 can be arranged along at least one of the length direction and the width direction of the box. At least one row or column of battery cells 1 can be arranged as needed. According to the needs, one or more layers of battery cells 1 can also be arranged in the height direction of the battery device 100.

[0077] In some embodiments, the plurality of battery cells 1 can be connected in series, in parallel, or in a mixed connection to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, which is housed in the box. In other embodiments, all the battery cells 1 are directly connected in series, in parallel, or in a mixed connection, and the whole formed by the battery cells 1 is housed in the box.

[0078] In some embodiments, the battery cell 1 includes an electrode assembly, a shell, an end cover, and a current collecting assembly. The shell has a receiving cavity for receiving the electrode assembly and an open end communicating with the receiving cavity. The end cover covers the open end. The current collecting assembly is electrically connected to the electrode assembly and the shell.

[0079] The electrode assembly can include first and second polar tabs having opposite polarities, and a separator disposed between the first and second polar tabs. In some embodiments, the first polar tab is a positive polar tab and the second polar tab is a negative polar tab. In other embodiments, the first polar tab is a negative polar tab and the second polar tab is a positive polar tab. During charging and discharging of the battery cell, active ions are intercalated and deintercalated between the positive and negative polar tabs. The separator, disposed between the positive and negative polar tabs, can prevent short circuiting between the positive and negative polar tabs while allowing the active ions to pass through.

[0080] In some embodiments, the positive polar tab can include a positive current collector substrate and a positive active material layer disposed on at least one surface of the positive current collector substrate.

[0081] As an example, the positive current collector substrate has two surfaces opposite in its own thickness direction, and the positive active material layer is disposed on either or both of the two opposite surfaces of the positive current collector substrate.

[0082] As an example, the positive current collector substrate can employ a metal foil or a composite current collector. For example, as a metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, etc. can be employed. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by disposing a metal material on a polymer material base.

[0083] In some embodiments, the negative polar tab can include a negative current collector substrate.

[0084] As an example, the negative current collector substrate can employ a metal foil, a foam metal, or a composite current collector. For example, as a metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, etc. can be employed. The foam metal can be a foam nickel, a foam copper, a foam aluminum, a foam alloy, or a foam carbon, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by disposing a metal material on a polymer material base.

[0085] In some embodiments, the negative polar tab can include a negative current collector substrate and a negative active material layer disposed on at least one surface of the negative current collector substrate.

[0086] As an example, the negative current collector substrate has two surfaces opposite in its own thickness direction, and the negative active material layer is disposed on either or both of the two opposite surfaces of the negative current collector substrate.

[0087] In some embodiments, the material of the positive current collector substrate can be aluminum and the material of the negative current collector substrate can be copper.

[0088] In some embodiments, the separator is a separator film. The type of the separator film is not particularly limited in the present application, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0089] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive electrode sheet and the negative electrode sheet, or can be attached to the surface of the positive electrode sheet and / or the surface of the negative electrode sheet while being located between the positive electrode sheet and the negative electrode sheet.

[0090] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is provided between the positive electrode sheet and the negative electrode sheet, and functions to transport ions and separate the positive electrode and the negative electrode.

[0091] In some embodiments, the battery cell further includes an electrolyte that functions to conduct ions between the positive electrode and the negative electrode. The type of the electrolyte is not particularly limited in the present application, and can be selected as needed. The electrolyte can be in a liquid state, a gel state, or a solid state.

[0092] As an example, the liquid electrolyte includes an electrolyte salt and a solvent.

[0093] In some embodiments, the electrode assembly includes a main body portion. The main body portion can be a main body portion of a wound structure in which the positive electrode sheet, the negative electrode sheet, and the separator are wound, or a main body portion of a stacked structure in which the positive electrode sheet, the negative electrode sheet, and the separator are overlapped. One or more positive electrode sheets and one or more negative electrode sheets can be provided, respectively. As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets are alternately arranged in the thickness direction of the electrode sheet.

[0094] In some embodiments, the shape of the main body portion can be cylindrical, flat, or polygonal, and the like. The end portion of the main body portion can be provided with a first tab and a second tab. The first tab can be formed by cutting or cutting the current collector substrate of the first electrode sheet, or can be connected to the side of the current collector substrate of the first electrode sheet by welding. The second tab can be formed by cutting or cutting the current collector substrate of the second electrode sheet, or can be connected to the side of the current collector substrate of the second electrode sheet by welding.

[0095] In an embodiment where the first electrode is a positive electrode and the second electrode is a negative electrode, the first electrode includes a positive electrode tab serving as a first electrode tab, and the second electrode includes a negative electrode tab serving as a second electrode tab. In an embodiment where the first electrode is a negative electrode and the second electrode is a positive electrode, the first electrode includes a negative electrode tab serving as a first electrode tab, and the second electrode includes a positive electrode tab serving as a second electrode tab.

[0096] The housing is used to encapsulate electrode components and electrolytes. The housing can be made of steel, aluminum, or composite metals, etc.

[0097] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0098] The housing has a cavity for accommodating electrode assemblies and electrolytes, and an open end communicating with the cavity for inserting the electrode assemblies. An end cap is provided at the open end to close it, thereby sealing the open end with the end cap.

[0099] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0100] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0101] The battery cells in this application embodiment are applicable to various types of batteries. The battery referred to herein is a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0102] The following is in conjunction with the appendix Figures 3 to 8 This application describes the structure of some embodiments of the battery device provided in this application.

[0103] like Figure 3 As shown, in some embodiments, the battery device includes a plurality of battery cells 1, a bus 2, and a sampling component 3. The plurality of battery cells 1 are used to provide electrical energy, the bus 2 is used to realize the electrical connection of the plurality of battery cells 1, and the sampling component 3 is disposed between the battery cells 1 and the bus 2. The battery cells 1, the bus 2, and the sampling component 3 are configured to be connected by a single welding.

[0104] In the embodiments of the present application, the battery device includes a plurality of battery monomers 1 for providing electric energy, and the plurality of battery monomers 1 can be electrically connected, such as in series, in parallel or in a mixed manner, through bus bars 2. A sampling assembly 3 can be used to collect current, voltage or other parameter signals of the plurality of battery monomers 1, so that a control system in the battery device controls the current, voltage or other parameters of the battery monomers 1 or takes corresponding measures.

[0105] In the embodiments of the present application, the sampling assembly 3 is arranged between the battery monomers 1 and the bus bars 2, and the battery monomers 1, the bus bars 2 and the sampling assembly 3 are configured to be connected through one welding. By configuring the battery monomers 1, the bus bars 2 and the sampling assembly 3 to be connected through one welding, the welding connection between the battery monomers 1, the bus bars 2 and the sampling assembly 3 can be achieved through one welding. Compared with the related art which requires two weldings to complete, the embodiments of the present application can reduce the number of weldings, simplify the operation steps in the manufacturing process, thereby effectively improving the manufacturing efficiency of the battery device; can also reduce the number of welding equipment, reduce the investment cost, and reduce the floor area of the manufacturing equipment, which is conducive to incremental expansion.

[0106] In the embodiments of the present application, the battery monomers 1, the bus bars 2 and the sampling assembly 3 are configured to be connected through one welding, which means that the connection between the battery monomers 1, the bus bars 2 and the sampling assembly 3 at one connection position can be completed through one welding, and is not limited to the connection of multiple battery monomers 1. Of course, in the embodiments in which a welding head is provided at each connection position, it can also be understood that the multiple connection positions of the plurality of battery monomers 1 and the bus bars 2 and the sampling assembly 3 can be connected through one-time synchronous welding.

[0107] When the battery monomers 1, the bus bars 2 and the sampling assembly 3 are welded and connected, the energy of the welding laser can penetrate the bus bars 2 and the sampling assembly 3 to reach the battery monomers 1, and the three layers of the battery monomers 1, the bus bars 2 and the sampling assembly 3 are welded at the same time, which realizes the electrical connection between the plurality of battery monomers 1 and the sampling.

[0108] In some embodiments, the battery monomers 1 include a pole 11, and the pole 11, the bus bars 2 and the sampling assembly 3 are configured to be connected through one welding.

[0109] In this embodiment, the pole 11 serves as a current output terminal or input terminal of the battery monomer 1, and by connecting the bus bars 2 and the sampling assembly 3 to the pole 11 of the battery monomer 1, the purpose of electrically connecting the plurality of battery monomers 1 through the bus bars 2 can be effectively achieved.

[0110] As Figure 4 and Figure 5As shown, in some embodiments, the sampling component 3 is provided with a first through hole 311, the battery cell 1 is provided with a first protrusion 12, and the sampling component 3 is fitted onto the first protrusion 12 through the first through hole 311.

[0111] By providing a first through hole 311 on the sampling component 3 and a first protrusion 12 on the battery cell 1, the sampling component 3 can be fitted onto the first protrusion 12 through the first through hole 311, thereby achieving the positioning and connection of the sampling component 3 and the battery cell 1, and effectively ensuring the relative fixation between the sampling component 3 and the battery cell 1.

[0112] The combination of the first through hole 311 and the first protrusion 12 can not only achieve relative fixation between the sampling component 3 and the battery cell 1, but also facilitate positioning and alignment during the assembly process of the sampling component 3 and the battery cell 1.

[0113] The first protrusion 12 can be a protrusion specifically designed for connecting the sampling component 3 on the battery cell 1, or it can be an existing, usable protrusion on the battery cell 1, or the terminal post 11 on the battery cell 1 can be used as the first protrusion 12. Figure 4 As shown.

[0114] The shapes of the first through hole 311 and the first protrusion 12 are matched to ensure that the sampling component 3 can be fitted onto the first protrusion 12 through the first through hole 311. For example, the cross-sections of the first through hole 311 and the first protrusion 12 can both be circular, triangular, quadrilateral or other shapes.

[0115] In other embodiments, a protrusion may be provided on the sampling component 3, and a concave hole may be provided on the battery cell 1 to achieve a hole-post fit between the sampling component 3 and the battery cell 1.

[0116] like Figure 6 As shown, in some embodiments, the battery device further includes a bracket 4, which is mounted on the battery cell 1, and the sampling component 3 is mounted on the bracket 4.

[0117] By setting the bracket 4, the sampling component 3 can be installed on the bracket 4, thereby effectively protecting the battery cell 1 and preventing damage to the battery cell 1.

[0118] like Figure 7 As shown, in some embodiments, the sampling component 3 is provided with a second through hole 312, and the bracket 4 is provided with a second protrusion 41. The sampling component 3 is fitted onto the second protrusion 41 through the second through hole 312.

[0119] By setting the second through hole 312 on the sampling assembly 3 and the second protruding part 41 on the bracket 4, the sampling assembly 3 can be sleeved on the second protruding part 41 through the second through hole 312, so as to realize the positioning and connection of the sampling assembly 3 and the bracket 4, and effectively ensure the relative fixation between the sampling assembly 3 and the bracket 4.

[0120] By adopting the cooperation mode of the second through hole 312 and the second protruding part 41, the relative fixation between the sampling assembly 3 and the bracket 4 can be realized, and the positioning and alignment during the sleeving process of the sampling assembly 3 and the bracket 4 can be facilitated.

[0121] The shapes of the second through hole 312 and the second protruding part 41 are matched with each other, so as to ensure that the sampling assembly 3 can be sleeved on the second protruding part 41 through the second through hole 312. For example, the cross sections of the second through hole 312 and the second protruding part 41 can be circular, triangular, quadrangular or other shapes.

[0122] In other embodiments, a protruding part can be arranged on the sampling assembly 3, and a recessed hole can be arranged on the bracket 4, so as to realize the hole-column cooperation between the sampling assembly 3 and the bracket 4.

[0123] In some embodiments, the bracket 4 is provided with a third through hole 42, and the battery monomer 1 is provided with a third protruding part 13, and the bracket 4 is sleeved on the third protruding part 13 through the third through hole 42.

[0124] By setting the third through hole 42 on the bracket 4 and the third protruding part 13 on the battery monomer 1, the bracket 4 can be sleeved on the third protruding part 13 through the third through hole 42, so as to realize the positioning and connection of the bracket 4 and the battery monomer 1, and effectively ensure the relative fixation between the bracket 4 and the battery monomer 1.

[0125] By adopting the cooperation mode of the third through hole 42 and the third protruding part 13, the relative fixation between the bracket 4 and the battery monomer 1 can be realized, and the positioning and alignment during the sleeving process of the bracket 4 and the battery monomer 1 can be facilitated.

[0126] The third protruding part 13 can be a protrusion specially arranged on the battery monomer 1 for connecting the bracket 4, can be an original protruding part available on the battery monomer 1, or can use two pole columns 11 and an explosion-proof valve on the battery monomer 1 as the third protruding part 13, as shown in FIG. 6. Figure 6

[0127] The shapes of the third through hole 42 and the third protruding part 13 are matched with each other, so as to ensure that the bracket 4 can be sleeved on the third protruding part 13 through the third through hole 42. For example, the cross sections of the third through hole 42 and the third protruding part 13 can be circular, triangular, quadrangular or other shapes.

[0128] ​In other embodiments, the protrusions can be arranged on the support 4, and the recesses can be arranged on the battery cell 1, so as to realize the hole-column cooperation between the support 4 and the battery cell 1.

[0129] In some embodiments, the sampling assembly 3 comprises a carrier 31, a connecting sheet 32 and a sampling line 33, the connecting sheet 32 is arranged on the carrier 31, and the sampling line 33 is electrically connected to the battery cell 1 through the connecting sheet 32.

[0130] The carrier 31 can be used to carry the connecting sheet 32 and the sampling line 33, and especially when the number of the connecting sheet 32 and the sampling line 33 is large, the carrier 31 can realize the relative fixation of the plurality of connecting sheets 32 and sampling lines 33.

[0131] In some embodiments, the carrier 31 is made of a plastic material. The plastic material has good hardness and can realize good support under the condition of the same thickness.

[0132] In some embodiments, the manufacturing material of the carrier 31 can be PET (Polyethyleneterephthalate, abbreviated as polyethylene terephthalate), PI (Polyimide, abbreviated as polyimide), PP (Polypropylene, abbreviated as polypropylene) or PC (Polycarbonate, abbreviated as polycarbonate). These materials are all high molecular materials and have good thermoplasticity.

[0133] As shown in FIG. 1, Figure 8 In some embodiments, the sampling line 33 comprises a main body segment 331 and a backfolding segment 332 which is bent relative to the extension direction of the main body segment 331.

[0134] The backfolding segment 332 can increase the length of the sampling line 33, so as to increase the resistance to the pulling force caused by the thermal expansion of the battery cell 1 to the sampling line 33, effectively avoid the pulling and breaking of the sampling line 33 caused by the thermal expansion of the battery cell 1, effectively protect the safety of the sampling line 33, and further ensure the effectiveness of the sampling, which is also conducive to improving the service life of the battery device.

[0135] In some embodiments, the backfolding segment 332 is integrally formed with the main body segment 331, and the backfolding segment 332 is a tail extension segment of the main body segment 331.

[0136] The backfolding segment 332 and the main body segment 331 form a U-shaped structure, and the bending part is a circular arc, which can avoid the breaking of the sampling line 33.

[0137] In some embodiments, the length of the backfolding segment 332 is 2mm-10mm.

[0138] The length of the turning section 332 is set to 2mm-10mm, such as 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, which can make the turning section 332 have better ability to resist the pulling force formed by the thermal expansion of the battery cell 1 on the sampling line 33, and facilitate the arrangement and fixation of the turning section 332.

[0139] In some embodiments, the thickness of the connecting piece 32 is 0.2mm-1mm.

[0140] The thickness of the connecting piece 32 is set to 0.2mm-1mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, which can make the connecting piece 32 have better electrical connection performance, and the welding laser can penetrate the connecting piece 32 to reach the battery cell 1, realizing one-time welding connection of the busbar 2, the sampling assembly 3 and the battery cell 1.

[0141] In the embodiments of the present application, the shape and number of the connecting piece 32 can be flexibly set according to requirements.

[0142] In some embodiments, the thickness of the busbar 2 is 0.8mm-3mm.

[0143] The thickness of the busbar 2 is set to 0.8mm-3mm, such as 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm, which can make the busbar 2 have better strength and better electrical connection performance.

[0144] In some embodiments, the first through hole 311, the second through hole 312 and the third through hole 42 can be circular, square or other shapes matching the shapes of the corresponding protruding parts.

[0145] In some embodiments, the first through hole 311, the second through hole 312 and the third through hole 42 are all circular, and the hole diameter is 3mm-6mm, such as 3mm, 4mm, 5mm or 6mm.

[0146] The structure of an embodiment of the battery device provided in the present application will be introduced below.

[0147] As shown in Figure 3 , the battery device includes a battery cell 1, a busbar 2 and a sampling assembly 3.

[0148] The number of the battery cell 1 is multiple, and the number of the busbar 2 and the sampling assembly 3 is one.

[0149] The multiple battery cells 1 are arranged side by side, and the sampling assembly 3 is arranged between the multiple battery cells 1 and the busbar 2.

[0150] As shown in Figure 4 and Figure 5 The busbar 2 has a plurality of electrical connectors.

[0151] The sampling assembly 3 comprises a carrier 31, a connecting piece 32 and a sampling line 33. The carrier 31 has the same shape as the module formed by the plurality of battery monomers 1 arranged side by side. The carrier 31 is provided with a plurality of connecting pieces 32, and each connecting piece 32 extends a sampling line 33. The ends of the plurality of sampling lines 33 are gathered together. The connecting piece 32 is used to realize the electrical connection between the busbar 2 and the battery monomer 1. The series connection of the plurality of battery monomers 1 can be realized through the busbar 2.

[0152] The tail end of the sampling line 33 has a backfolding section, which can better release the pulling stress of the battery monomer 1 thermal expansion on the sampling line 33, protect the sampling line 33 from being damaged by pulling, and thus improve the service life of the battery device.

[0153] The battery monomer 1 has a pole 11, and the connecting piece 32 is electrically connected with the pole 11.

[0154] As shown in Figure 6 and Figure 7 The battery device further comprises a bracket 4, the bracket 4 is installed on the battery monomer 1, and the sampling assembly 3 is installed on the bracket 4.

[0155] The sampling assembly 3 is provided with a second through hole 312, the bracket 4 is provided with a second protruding part 41, and the sampling assembly 3 is sleeved on the second protruding part 41 through the second through hole 312.

[0156] The bracket 4 is provided with a third through hole 42, the battery monomer 1 is provided with a third protruding part 13, and the bracket 4 is sleeved on the third protruding part 13 through the third through hole 42.

[0157] As shown in Figure 8 The sampling line 33 comprises a main body section 331 and a backfolding section 332, and the length of the sampling line 33 can be increased by setting the backfolding section 332, so as to overcome the pulling of the sampling line 33 caused by the thermal expansion of the battery monomer 1, effectively protect the sampling line 33 and improve the service life of the sampling line 33.

[0158] The sampling line connection mode used in the battery device provided by the application can be applied in the fields of power batteries, energy storage batteries, electronic appliances, mechanical devices and the like.

[0159] The battery device provided in the application comprises the following steps: firstly, fixing the connecting piece 32 and the sampling line 33 on the carrier 31 to form a sampling assembly 3; then, installing the sampling assembly 3 on the bracket 4, and installing the bracket 4 on the battery monomer 1; finally, placing the busbar 2 on the sampling assembly 3. After the assembly is completed, the stacked structure of the busbar 2, the sampling assembly 3 and the battery monomer 1 is simultaneously subjected to laser welding, the laser energy penetrates the busbar 2 and the sampling assembly 3, and reaches the pole 11 of the battery monomer 1, so that the busbar 2, the sampling assembly 3 and the battery monomer 1 are simultaneously welded, and the series connection and sampling of the plurality of battery monomers 1 are completed.

[0160] According to the structural modification of the sampling assembly 3 and the battery monomer 1, the busbar 2, the sampling assembly 3 and the battery monomer 1 can be connected through one welding process, the manufacturing efficiency is effectively improved, the equipment investment cost is reduced, and the floor area is reduced.

[0161] The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be referred to each other, and will not be described herein for the sake of brevity.

[0162] Those skilled in the art can understand that, in the above method of the specific embodiment, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process, and the specific execution order of each step should be determined according to its function and possible internal logic.

[0163] Although the application has been described with reference to the preferred embodiments, various improvements can be made and parts thereof can be replaced with equivalents without departing from the scope of the application. In particular, each technical feature mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The 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: Multiple battery cells (1) are used to provide electrical energy; Busbar (2) is used to realize the electrical connection of multiple battery cells (1); and A sampling component (3) is disposed between the battery cell (1) and the busbar (2), and the battery cell (1), the busbar (2) and the sampling component (3) are configured to be connected by a single welding.

2. The battery device according to claim 1, characterized in that, The battery cell (1) includes a terminal post (11), and the terminal post (11), the busbar (2) and the sampling assembly (3) are configured to be connected by a single welding process.

3. The battery device according to claim 1, characterized in that, The sampling component (3) is provided with a first through hole (311), and the battery cell (1) is provided with a first protrusion (12). The sampling component (3) is fitted onto the first protrusion (12) through the first through hole (311).

4. The battery device according to claim 1, characterized in that, The battery device also includes a bracket (4), which is mounted on the battery cell (1), and the sampling component (3) is mounted on the bracket (4).

5. The battery device according to claim 4, characterized in that, The sampling component (3) is provided with a second through hole (312), and the bracket (4) is provided with a second protrusion (41). The sampling component (3) is fitted onto the second protrusion (41) through the second through hole (312).

6. The battery device according to claim 4, characterized in that, The bracket (4) is provided with a third through hole (42), and the battery cell (1) is provided with a third protrusion (13). The bracket (4) is fitted onto the third protrusion (13) through the third through hole (42).

7. The battery device according to claim 1, characterized in that, The sampling component (3) includes a carrier (31), a connecting piece (32) and a sampling line (33). The connecting piece (32) is mounted on the carrier (31), and the sampling line (33) and the battery cell (1) are electrically connected through the connecting piece (32).

8. The battery device according to claim 7, characterized in that, The support component (31) is made of plastic material.

9. The battery device according to claim 7, characterized in that, The sampling line (33) includes a main body segment (331) and a folded-back segment (332) that bends relative to the extension direction of the main body segment (331).

10. The battery device according to claim 9, characterized in that, The length of the folded section (332) is 2mm to 10mm.

11. The battery device according to claim 7, characterized in that, The thickness of the connecting piece (32) is 0.2 mm to 1 mm.

12. The battery device according to claim 7, characterized in that, The thickness of the busbar (2) is 0.8 mm to 3 mm.

13. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1 to 12, the battery device being used to supply electrical energy to the electrical equipment.

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