Sampling assembly, battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a sampling assembly, a battery device, an energy storage device and a power utilization device. The battery device comprises the sampling assembly and a plurality of current collecting pieces. The sampling assembly comprises a connector and a plurality of conducting wires, each conducting wire comprises a binding part and a switching part, the two ends of each binding part are electrically connected with the first end of the switching part and the connector respectively, the second end of each switching part is electrically connected with the current collecting piece, and in at least part of two adjacent conducting wires, the distance between the first ends of the two conducting wires is a first distance, and the distance between the second ends of the two conducting wires is a second distance; the distance between the collecting parts of the two parts and the connecting position of the connector is a second distance, and the first distance is smaller than the second distance. According to the battery device provided by the embodiment of the invention, the switching parts and the connector are electrically connected through the collecting part, so that on one hand, the switching parts of the wires can be gathered together and gaps between the switching parts can be reduced, and the space occupied by all the switching parts can be reduced; and on the other hand, the lead can be matched with the original connector, and the production cost can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and specifically to a sampling component, a battery device, an energy storage device, and an electrical device. Background Art

[0002] The battery device is provided with a sampling component, which is used to collect various physical parameter information in the battery device, such as temperature, voltage, current, etc., and transmit these physical parameter information to the battery management unit in the battery device. The battery management unit controls the operation of the battery device according to these physical parameter information.

[0003] The sampling assembly is provided with a connector and a plurality of wires, which can be used to electrically connect the connector to the current collector on the battery cell, and the connector is electrically connected to the battery management unit so that the battery management unit can obtain physical parameter information such as voltage and current of the battery cell.

[0004] As the demand for compact battery devices continues to increase, the size of the battery cells in the battery device is more compact, and the arrangement of multiple battery cells is more dense, so the arrangement of wires also needs to be more dense. However, in order to adapt to the interface of the battery management unit, the arrangement of the connector has not changed, so that the sampling assembly in the prior art cannot meet the installation requirements. Utility Model Content

[0005] In view of this, the embodiments of the present application hope to provide a sampling assembly, a battery device, an energy storage device, and an electrical device that are advantageously compact in structure.

[0006] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] An embodiment of the present application provides a battery device, the battery device comprising:

[0008] Multiple current collectors;

[0009] A sampling assembly includes a connector and a plurality of conductors, wherein the conductors include a gathering portion and a transition portion, wherein two ends of the gathering portion are electrically connected to a first end of the transition portion and the connector respectively, and a second end of the transition portion is electrically connected to the current collecting member, and in at least partially adjacent two of the conductors, a spacing between the first ends of the two conductors is a first distance, and a spacing between connection positions of the gathering portions of the two conductors and the connector is a second distance, and the first distance is smaller than the second distance.

[0010] The battery device in the embodiment of the present application electrically connects the adapter part and the connector through the gathering part. On the one hand, it enables the adapter parts of each wire to be gathered together and reduce the gap between each other, which is beneficial to reduce the space occupied by all adapter parts, so that the arrangement of the adapter parts can better adapt to the compact arrangement of multiple current collectors, which is beneficial to make the structure in the battery device more compact; on the other hand, it is beneficial to adapt the wire to the original connector, so that there is no need to redesign a new connector and a battery management unit, which is beneficial to reduce production costs.

[0011] In some embodiments, the converging portion extends in a straight line, and the distance between at least two adjacent converging portions gradually decreases along the direction from the connector to the adapter portion. In this way, the converging portion extends in a straight line, which is conducive to simplifying the manufacturing process of the converging portion, so that the converging portion does not need to be bent, which is conducive to reducing the risk of cracking, breaking, etc. of the converging portion due to bending stress.

[0012] In some embodiments, the constriction portion includes a first connecting sub-portion, the first connecting sub-portion extends linearly and is electrically connected to the first end, the transition portion includes a second connecting sub-portion, the second connecting sub-portion includes the first end, the second connecting sub-portion extends linearly in a direction away from the connector, and the angle between the extending direction of the first connecting sub-portion and the extending direction of the second connecting sub-portion does not exceed 30°. In this way, it is helpful to reduce the bending stress generated by bending at the connection position between the first connecting sub-portion and the second connecting sub-portion, reduce the risk of cracking, breaking and other problems caused by bending at the connection position between the first connecting sub-portion and the second connecting sub-portion, and help to extend the service life of the wire.

[0013] In some embodiments, each of the wires is located at one end of the connector along the first direction and arranged along the second direction, the first direction intersects the second direction, and among the plurality of the bunching portions, a portion of the bunching portions and another portion of the bunching portions are arranged symmetrically with respect to a reference plane perpendicular to the second direction. This is conducive to simplifying the manufacturing process of the bunching portion during the wire manufacturing process, reducing production costs, and improving production efficiency.

[0014] In some embodiments, the first distance ranges from 1 mm to 1.5 mm, which can help to make the arrangement of the adapters more compact while reducing the risk of short circuit between two adjacent adapters;

[0015] And / or, the second distance ranges from 1.8 mm to 3 mm, which is beneficial for making the arrangement of the convergence part more compact and reducing the overall external contour size of the sampling assembly.

[0016] In some embodiments, the wire further includes a fixing portion, the fixing portion is fixed to and electrically connected to the current collector, at least a portion of the fixing portion is bent and extended, and the fixing portion is electrically connected to the second end. In this way, the shape and size of the fixing portion are changed by the deformation caused by the bent portion of the fixing portion to adapt to the displacement of the current collector, which is conducive to keeping the position of the second end of the transition portion unchanged, thereby reducing the risk of damage to the transition portion and the gathering portion due to the pulling force, which is conducive to improving the service life of the wire.

[0017] In some embodiments, the adapter portion extends in a straight line, and the fixed portion includes a bending sub-portion and a third connecting sub-portion, the bending sub-portion connects the second end and the third connecting sub-portion, the bending sub-portion bends in a direction close to the connector, and the third connecting sub-portion is electrically connected to the current collecting member. In this way, on the one hand, it is helpful to reduce the overall size of the sampling assembly along the extension direction of the adapter portion, which is helpful to make the structure of the sampling assembly more compact; on the other hand, it is helpful to increase the deformation amplitude of the bending sub-portion along the extension direction of the adapter portion, thereby increasing the travel of the third connecting sub-portion with the displacement of the current collecting member, and reducing the risk of the adapter portion being damaged by the pulling force.

[0018] In some embodiments, the battery device further comprises a plurality of battery cells, the current collector and the battery cells are fixed and electrically connected, the plurality of battery cells are arranged along a first direction, and the adapter and the third connecting sub-portion both extend along the first direction. In this way, the displacement direction of the third connecting sub-portion is adapted to the direction of the maximum expansion change amplitude of the battery cell, which is conducive to reducing the risk of the adapter being damaged by a pulling force.

[0019] In some embodiments, the wire is located at one end of the connector along the first direction, and the wires are arranged at intervals along the second direction. The sampling assembly also includes an insulating coating, and the transition part and the contraction part of a single wire are both attached to the insulating coating along the third direction, and the first direction, the second direction and the third direction intersect with each other. In this way, the insulating coating can help reduce the risk of the transition part and the contraction part contacting with external objects, causing short circuits, unstable signal transmission, and other problems; the bonding force and friction between the insulating coating and the wire can also be used to reduce the probability of the transition part and the contraction part moving and contacting other wires.

[0020] The embodiment of the present application also provides an energy storage device, comprising the battery device of any of the above embodiments, so as to make the structure of the battery device more compact, and further make the structure of the energy storage device more compact.

[0021] The embodiment of the present application also provides an electric device, comprising any of the battery devices in the above embodiments or the energy storage device in the above embodiments. This is conducive to making the structure of the electric device more compact and improving the space utilization of the electric device.

[0022] An embodiment of the present application also provides a sampling component, which is used to be electrically connected to a current collecting part in a battery device. The sampling component includes a connector and a plurality of wires, and the wires include a gathering portion and a transition portion. Two ends of the gathering portion are electrically connected to a first end of the transition portion and the connector, respectively, and a second end of the transition portion is electrically connected to the current collecting part. In at least partially adjacent two of the wires, the spacing between the first ends of the two respective ones is a first distance, and the spacing between the connection positions of the gathering portions of the two respective ones and the connector is a second distance, and the first distance is smaller than the second distance.

[0023] In some embodiments, the converging portion extends in a straight line, and the distance between at least two adjacent converging portions gradually decreases along the direction from the connector to the adapter portion. In this way, the converging portion extends in a straight line, which is conducive to simplifying the manufacturing process of the converging portion, so that the converging portion does not need to be bent, which is conducive to reducing the risk of cracking, breaking, etc. of the converging portion due to bending stress.

[0024] In some embodiments, the wire further includes a fixing portion, the fixing portion is fixed to and electrically connected to the current collector, and at least a portion of the fixing portion is bent and extended and electrically connected to the second end. In this way, the shape and size of the fixing portion are changed by the deformation caused by the bent portion of the fixing portion to adapt to the displacement of the current collector, which is conducive to keeping the position of the second end of the transition portion unchanged, thereby reducing the risk of damage to the transition portion and the gathering portion due to the pulling force, which is conducive to improving the service life of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of an electric device being a vehicle in one embodiment of the present application;

[0026] Figure 2 A schematic diagram of a battery device in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a sampling component in one embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of a sampling component in another embodiment of the present application;

[0029] Figure 5 for Figure 4 A partial enlarged schematic diagram of position A in the middle;

[0030] Figure 6 forFigure 4 A partial enlarged schematic diagram of position B in the middle;

[0031] Figure 7 In another embodiment of the present application, the sampling component is Figure 4 Schematic diagram of the cross section at the CC position;

[0032] Figure 8 A schematic diagram of a sampling assembly, a current collecting member and a battery cell in one embodiment of the present application;

[0033] Figure 9 for Figure 8 Explosion diagram of

[0034] Figure 10 This is a schematic diagram of a wire, a first guide member, and a second guide member during the manufacturing process of a sampling assembly in one embodiment of the present application;

[0035] Figure 11 for Figure 10 A partial enlarged schematic diagram of the D position in the middle.

[0036] Description of Reference Numerals

[0037] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, housing; 11, first housing; 12, second housing; 20, battery cell; 21, electrode terminal; 30, sampling assembly; 31, connector; 32, wire; 321, gathering portion; 3211, first connecting sub-portion; 322, transition portion; 3221, second connecting sub-portion; 323, fixing portion; 3231, bending sub-portion; 3232, third connecting sub-portion; 33, insulating coating; 40, current collecting member; 50, first guide member; 50a, first guide groove; 60, second guide member; 60a, second guide groove; C10, reference surface. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", "third", 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 "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, for the convenience of explanation, as shown in the accompanying drawings of the specification, the direction of arrow F1 is referred to as the "first direction", the direction of arrow F2 is referred to as the "second direction", and the direction of arrow F3 is referred to as the "third direction".

[0044] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0046] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0047] 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 the present application are not limited thereto.

[0048] Generally, the battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and allow the active ions to pass through at the same time.

[0049] In some embodiments, the battery cell may include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0050] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc., and the present application has no special limitation.

[0051] In some embodiments, the housing includes an end cap and a housing body, the housing body is provided with an opening, and the end cap covers the opening. The housing body can be provided with one or more openings. One or more end caps can also be provided.

[0052] In some embodiments, the battery cell may include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealing bag is further included between the housing and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0053] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. There is no special limitation in this application.

[0054] In some embodiments, the outer casing includes an end cap and a housing. The housing is provided with an opening, and the end cap covers the opening. The housing can be provided with one or more openings. One or more end caps can also be provided.

[0055] In some embodiments, at least one electrode terminal is provided on the outer casing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0056] In some embodiments, a pressure relief mechanism is provided on the outer casing. The pressure relief mechanism is used to discharge the internal gas of the battery cell.

[0057] As an example, it is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is damaged, thereby forming an opening or a channel for the internal pressure or temperature to be released. This threshold design varies according to different design requirements. The threshold may depend on one or several materials among the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell.

[0058] As an example, the pressure relief mechanism can be integrally formed with the outer casing.

[0059] As an example, the pressure relief mechanism can also be separately provided and connected to the outer casing.

[0060] The "actuation" mentioned in this application means that the pressure relief mechanism generates an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell can be released. The actions generated by the pressure relief mechanism can include but are not limited to: the components in the pressure relief mechanism move to form an exhaust channel, at least a part of the pressure relief mechanism breaks, is crushed, is torn or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell are discharged outward from the actuated part as emissions. In this way, the battery cell can be depressurized and cooled under a controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0061] In some embodiments, when the outer casing is a non-sealed structure, the pressure relief mechanism can be set as a through hole for discharging the internal gas of the battery cell.

[0062] The emissions from a battery cell mentioned in this application include, but are not limited to: electrolytes, dissolved or fragmented positive and negative electrode sheets, debris of separators, high-temperature and high-pressure gases generated by reactions, flames, and so on.

[0063] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0064] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0065] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0066] In some embodiments, the battery apparatus may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0067] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0068] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0069] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body may become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0070] As an example, referring to Figure 2 , the box body 10 may include a first box body 11 and a second box body 12. The first box body 11 and the second box body 12 are buckled so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly. The "closed" here means covered or closed, which can be sealed or non-sealed. The first box body 11 may be a top cover or a bottom plate.

[0071] As an example, the box body may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0072] The technical solutions described in the embodiments of this application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, power tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0073] In the following embodiments, for the convenience of description, the electrical device in an embodiment of this application is taken as an example of vehicle 1000 for illustration. The following is described with reference to the accompanying drawings.

[0074] Vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. As Figure 1 shown, a battery device 100 is disposed inside vehicle 1000. The battery device 100 can be disposed at the bottom, head, or tail of vehicle 1000. The battery device 100 can be used for power supply of vehicle 1000. For example, the battery device 100 can be used as the operating power source of vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of vehicle 1000.

[0075] In some embodiments of this application, the battery device 100 can not only be used as the operating power source of vehicle 1000, but also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0076] Next, the embodiments of this application will be described in detail.

[0077] In the related art, the sampling component includes a connector and a plurality of wires. One end of the wire is electrically connected to the interface of the connector, and the other end can be electrically connected to the current collector. The connector is connected to the battery management unit, and the current collector can be electrically connected to the electrode terminal of the battery cell. The sampling component can transmit the physical parameter information such as current and voltage collected from the current collector to the battery management unit in the form of an electrical signal.

[0078] Due to the more compact size of the battery cells in the battery device and the more dense arrangement between the plurality of battery cells, the arrangement between the current collectors has also become more dense. In order to enable each wire to be electrically connected to the corresponding current collector, the distance between the wires needs to be reduced. However, since the wires extend in a straight line direction and the extension direction is the same as the arrangement direction of the current collectors, and the sizes of the connector and the battery management unit remain unchanged, it is difficult to reduce the distance between the wires in order to adapt to the connector.

[0079] Based on the above technical problems, an embodiment of the present application aims to provide a battery device, the battery device includes a sampling component, the sampling component includes a connector and a plurality of wires, the wires include a gathering portion and a transition portion connected to each other, and in two adjacent wires, the spacing between the connection positions of the respective gathering portions and the connector is greater than the spacing between the connection positions of the respective gathering portions and the transition portions, thereby facilitating a more compact arrangement of the transition portions of the respective wires and facilitating a more compact arrangement of the adaptor current collector.

[0080] Specifically, see Figures 3 to 5 , Figure 8 The battery device 100 includes a sampling assembly 30 and a plurality of current collecting members 40 .

[0081] The sampling assembly 30 includes a connector 31 and a plurality of wires 32. The wires 32 include a bunching portion 321 and a transition portion 322. The two ends of the bunching portion 321 are electrically connected to the first end of the transition portion 322 and the connector 31, respectively. The second end of the transition portion 322 is electrically connected to the current collecting member 40. In at least partially adjacent two wires 32, the spacing between the first ends of the two wires is a first distance, and the spacing between the connection positions of the bunching portions 321 of the two wires and the connector 31 is a second distance. The first distance is smaller than the second distance.

[0082] That is, see Figure 5 In at least partially adjacent two conductive wires 32 , the distance between the first ends of the two conductive wires is L1 , and the distance between the connecting positions of the respective converging portions 321 and the connector 31 is L2 , and L1 < L2 .

[0083] Current collector 40, see Figure 7 , used to electrically connect the electrode terminals 21 of at least two battery cells 20 so that the two battery cells 20 can be connected in series or in parallel.

[0084] The connector 31 is used to be electrically connected to the battery management unit in the battery device 100. The connector 31 includes a first port for electrically connecting to the battery management unit and a second port for electrically connecting to the converging portion 321.

[0085] It is understandable that the number of wires 32 is not less than the number of current collectors 40, so that each current collector 40 can be electrically connected to at least one wire 32 to transmit physical parameter information such as current and voltage of each current collector 40 to the battery management unit via the sampling component 30.

[0086] The first end and the second end of the transition portion 322 are intended to distinguish one end and the other end of the transition portion 322 along its extending direction, and do not specifically refer to one end.

[0087] The second end of the transition portion 322 is electrically connected to the current collector 40 . The second end may be directly in contact with the current collector 40 to achieve electrical connection, or the second end may be electrically connected to the current collector 40 through other conductive objects.

[0088] An electrical conduction path is formed between the connector 31 , the converging portion 321 , the adapter 322 and the current collecting member 40 , so that the physical parameter information of the current collecting member 40 can be sent to the battery management unit through the sampling assembly 30 in the form of an electrical signal.

[0089] Two adjacent conductive lines 32 refer to a conductive line 32 and another conductive line 32 that is closest to the conductive line 32 .

[0090] In two adjacent conductive wires 32 , the bundled portions 321 of the two conductive wires 32 are spaced apart from each other.

[0091] It can be understood that the smaller the first distance is, the more compact the arrangement between two adjacent transition portions 322 is.

[0092] It can be understood that the second distance needs to be compatible with the spacing between the second ports of the connector 31 .

[0093] The battery device 100 in the embodiment of the present application electrically connects the adapter portion 322 and the connector 31 through the gathering portion 321. On the one hand, it enables the adapter portions 322 of each wire 32 to be gathered together and reduce the gaps between each other, which is beneficial to reducing the space occupied by all the adapter portions 322, so that the arrangement of the adapter portions 322 can better adapt to the compact arrangement of multiple current collectors 40, which is beneficial to making the structure inside the battery device 100 more compact; on the other hand, it is beneficial to adapt the wire 32 to the original connector 31, so that there is no need to redesign a new connector 31 and a battery management unit, which is beneficial to reducing production costs.

[0094] It can be understood that the current collecting member 40 is conductive, and its specific material may be copper, aluminum, etc.

[0095] The specific method of achieving the first distance being smaller than the second distance is not limited.

[0096] In some embodiments, the converging portion 321 is bent and extended along the direction of the connector 31 pointing to the adapter portion 322 , and each time the converging portion 321 is bent, the distance between two adjacent converging portions 321 is reduced.

[0097] In some other embodiments, see Figure 5 The converging portion 321 extends in a straight line, and along the direction from the connector 31 to the adapter portion 322 , the spacing between at least some adjacent converging portions 321 gradually decreases.

[0098] That is, the straight line where the extension direction of the converging portion 321 lies is inclined to the straight line where the relative direction between the connector 31 and the first end lies.

[0099] Along the direction from the connector 31 to the transition portion 322 , at least a portion of the convergence portion 321 gradually converges.

[0100] In this way, the straight extension of the convergence portion 321 is conducive to simplifying the manufacturing process of the convergence portion 321, so that the convergence portion 321 does not need to be bent, which is conducive to reducing the risk of cracking, breaking and other problems of the convergence portion 321 due to bending stress.

[0101] It can be understood that the straight line where at least part of the contraction portion 321 extends has different inclination angles relative to the straight line where the relative direction between the connector 31 and the first end is located.

[0102] In some embodiments, the linear extension direction of at least one converging portion 321 and the relative direction between the connector 31 and the first end are consistent, and the linear extension direction of the converging portion 321 adjacent to the converging portion 321 is inclined to the relative direction between the connector 31 and the first end.

[0103] In some embodiments, see Figure 5 The gathering portion 321 includes a first connecting sub-portion 3211, which extends linearly and is electrically connected to the first end. The transition portion 322 includes a second connecting sub-portion 3221, which includes a first end and extends linearly in a direction away from the connector 31. The extension direction of the first connecting sub-portion 3211 is inclined to the extension direction of the second connecting sub-portion 3221.

[0104] That is, a portion of the wire 32 extends in a straight direction to form the first connecting sub-portion 3211, and then bends at a preset angle and continues to extend in another straight direction to form the second connecting sub-portion 3221. The bending position is the connecting position of the first connecting sub-portion 3211 and the second connecting sub-portion 3221.

[0105] In this way, the first connecting sub-portion 3211 and the second connecting sub-portion 3221 extend in different linear directions respectively, which is beneficial to simplifying the manufacturing process of the gathering portion 321 and the transition portion 322 .

[0106] In some embodiments, see Figure 5 , along the direction from the connector 31 to the adapter portion 322 , the distance between at least some of the adjacent two first connecting sub-portions 3211 gradually decreases.

[0107] This is done so that the first distance is smaller than the second distance.

[0108] In some embodiments, the straight-line extension directions of the second connecting sub-portions 3221 of each transition portion 322 are the same, that is, the second connecting sub-portions 3221 are parallel to each other, which helps to further simplify the manufacturing process of the transition portion 322 .

[0109] It can be understood that the number of the first connecting sub-parts 3211 and the second connecting sub-parts 3221 are both multiple, and therefore, the angles between the extension directions of the first connecting sub-parts 3211 and the second connecting sub-parts 3221 can be the same as each other, different from each other, or the same in part and different in another part.

[0110] In some embodiments, see Figure 5 , the angle between the extension direction of the first connecting sub-portion 3211 and the extension direction of the second connecting sub-portion 3221 does not exceed 30°. That is, the angle between the extension direction of the first connecting sub-portion 3211 and the extension direction of the second connecting sub-portion 3221 is α, α≤30°.

[0111] This helps to reduce the bending stress caused by bending at the connection position between the first connecting sub-part 3211 and the second connecting sub-part 3221, reduces the risk of cracking, breaking and other problems caused by bending at the connection position between the first connecting sub-part 3211 and the second connecting sub-part 3221, and helps to extend the service life of the wire 32.

[0112] The specific value of the angle between the extension direction of the first connecting sub-portion 3211 and the extension direction of the second connecting sub-portion 3221 can be 0°, 5°, 10°, 15°, 20°, 25°, 30°, etc.

[0113] A specific method for measuring the angle between the extension direction of the first connecting sub-part 3211 and the extension direction of the second connecting sub-part 3221 can be, under a room temperature of 25°C, placing the wire 32 in the measuring area of ​​the projection measuring instrument, operating the projection measuring instrument to obtain the respective projections of the first connecting sub-part 3211 and the second connecting sub-part 3221, and obtaining the extension directions of the two through the projection, and then measuring the angle between the projections of the two.

[0114] It can be understood that the portion of the convergence portion 321 located outside the first transition sub-portion can be a curved extension or a straight extension; the portion of the transition portion 322 located outside the second transition sub-portion can be a curved extension or a straight extension.

[0115] In some embodiments, see Figure 3 and Figure 4Each wire 32 is located at one end of the connector 31 along the first direction and arranged along the second direction, and the first direction intersects the second direction so that the other end of the connector 31 along the first direction is used for electrical connection to the battery management unit and is unlikely to interfere with the arrangement of the wires 32.

[0116] Understandably, see Figure 3 and Figure 4 , the wire 32 extends in a direction away from the connector 31 .

[0117] In some embodiments, the transition portion 322 extends linearly along the first direction, which helps to simplify the manufacturing process of the transition portion 322 .

[0118] It can be understood that in the embodiment where the plurality of transition portions 322 extend linearly along the first direction, the interval between two adjacent transition portions 322 is the first distance.

[0119] In some embodiments where the constriction portion 321 extends in a straight line, see Figure 4 and Figure 5 , the extension direction of the convergence portion 321 is inclined to the first direction.

[0120] In some embodiments, the first direction and the second direction are perpendicular to each other.

[0121] In some embodiments, see Figure 5 Among the plurality of convergent portions 321 , some of the convergent portions 321 are symmetrically arranged with respect to another portion of the convergent portions 321 with respect to a reference plane C10 perpendicular to the second direction.

[0122] The reference plane C10 is a virtual plane, and the normal direction of the reference plane C10 is the same as the second direction.

[0123] This is helpful to simplify the manufacturing process of the bundled portion 321 during the manufacturing process of the wire 32, reduce production costs, and improve production efficiency.

[0124] It may be that among all the convergence portions 321 , half of the convergence portions 321 are arranged symmetrically with the other half of the convergence portions 321 ; or it may be that among all the convergence portions 321 , a part of the convergence portions 321 are arranged symmetrically.

[0125] In some embodiments, see Figure 5 The first distance ranges from 1 mm (millimetre) to 1.5 mm, that is, 1 mm ≤ L1 ≤ 1.5 mm.

[0126] In this way, the arrangement of the adapter parts 322 can be made more compact, while reducing the risk of short circuit between two adjacent adapter parts 322 .

[0127] The specific value of the first distance may be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc.

[0128] Under a room temperature of 25° C., the first distance can be obtained by measuring the distance between the end surfaces of two adjacent first ends close to each other with a vernier caliper.

[0129] In some embodiments, see Figure 5 , the second distance ranges from 1.8 mm to 3 mm, that is, 1.8 mm ≤ L2 ≤ 3 mm.

[0130] This helps to make the arrangement of the contraction portion 321 more compact and reduce the overall external dimensions of the sampling assembly 30 .

[0131] The specific value of the second distance can be 1.8mm, 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, etc.

[0132] Under room temperature of 25° C., the second distance can be obtained by measuring the distance between the surfaces of the connection positions of the adjacent converging portions 321 and the connector 31 close to each other at one end using a vernier caliper.

[0133] It is understandable that during the charging and discharging process, the battery cell 20 generates heat, which causes the outer dimensions of the battery cell 20 to expand, thereby causing the current collector 40 to move, thereby causing the current collector 40 to apply a pulling force to the wire 32 electrically connected thereto.

[0134] In some embodiments, see Figure 3 and Figure 6 The wire 32 further includes a fixing portion 323 , which is fixed to and electrically connected to the current collecting member 40 , at least a portion of the fixing portion 323 is bent and extended, and the fixing portion 323 is electrically connected to the second end.

[0135] The adapter portion 322 is electrically connected to the current collecting member 40 via the fixing portion 323 .

[0136] The bent portion of the fixing portion 323 has a lower structural strength than other portions thereof, and therefore is easily deformed under external forces.

[0137] In this way, the deformation caused by the bending part of the fixing part 323 allows the shape and size of the fixing part 323 to change to adapt to the displacement caused by the current collecting part 40, which is beneficial for the position of the second end of the transition part 322 to remain unchanged, thereby reducing the risk of damage to the transition part 322 and the gathering part 321 due to the pulling force, which is beneficial for improving the service life of the wire 32.

[0138] The specific bending manner of the fixing portion 323 is not limited.

[0139] In some embodiments, a portion of the fixing portion 323 is bent and extended back and forth, which helps to increase the deformation amplitude of the fixing portion 323 so as to adapt to the larger displacement generated by the current collecting member 40 .

[0140] In some embodiments where the transition portion 322 extends in a straight line, see Figure 6 The fixing portion 323 includes a bending sub-portion 3231 and a third connecting sub-portion 3232 , the bending sub-portion 3231 connects the second end and the third connecting sub-portion 3232 , the bending sub-portion 3231 bends toward a direction close to the connector 31 , and the third connecting sub-portion 3232 is electrically connected to the current collecting member 40 .

[0141] That is to say, the third connecting sub-portion 3232 and the transition portion 322 are located at the same end of the bending sub-portion 3231 .

[0142] In this way, on the one hand, it is helpful to reduce the overall size of the sampling assembly 30 along the extension direction of the adapter portion 322, which is helpful to make the structure of the sampling assembly 30 more compact; on the other hand, it is helpful to increase the deformation amplitude of the bending sub-portion 3231 along the extension direction of the adapter portion 322, thereby increasing the displacement stroke of the third connecting sub-portion 3232 with the current collecting member 40, and reducing the risk of the adapter portion 322 being damaged by the pulling force.

[0143] The third connecting sub-portion 3232 is fixed to the current collecting member 40 so that the two maintain electrical connection. The fixing method between the two is not limited, such as welding.

[0144] It is understandable that the specific arrangement of the fixing portion 323 and the adapter portion 322 needs to be compatible with the arrangement of other components in the battery device 100 .

[0145] Specifically, see Figure 8 and Figure 9 The battery device 100 further includes a plurality of battery cells 20 , the current collector 40 fixes and electrically connects the battery cells 20 , the plurality of battery cells 20 are arranged along a first direction, and the adapter portion 322 and the third connecting sub-portion 3232 both extend along the first direction.

[0146] It can be understood that the overall outer contour formed by the plurality of battery cells 20 has the largest expansion variation range along the first direction.

[0147] It can be understood that the adapter portion 322 and the third connecting sub-portion 3232 are located at one end of the bending sub-portion 3231 close to the connector 31 along the first direction, and the third connecting sub-portion 3232 can generate a large displacement in the first direction.

[0148] In this way, the displacement direction of the third connecting sub-portion 3232 is adapted to the direction of the maximum expansion change amplitude of the battery cell 20 , which helps to reduce the risk of the adapter portion 322 being damaged by the pulling force.

[0149] In some embodiments, see Figure 6 The third connecting sub-portion 3232 and the adapter portion 322 are spaced apart. On the one hand, this reduces the risk of short circuit between the two due to electrical conduction. On the other hand, this helps to reduce the probability of the third connecting sub-portion 3232 moving with the current collecting member 40 due to obstruction by the adapter portion 322.

[0150] In some embodiments where the plurality of battery cells 20 extend along the first direction, see Figure 8 The multiple current collecting parts 40 are divided into two groups, the current collecting parts 40 in each group are arranged along the first direction, the two groups of current collecting parts 40 are spaced apart along the second direction to form a mounting groove between the two groups of current collecting parts 40, and the multiple adapter parts 322 extend linearly along the first direction and are located in the mounting groove.

[0151] In the case where the distance between the two groups of current collecting members 40 along the second direction is small, a portion of the sampling assembly 30 in the embodiment of the present application can still be arranged in the installation groove.

[0152] This helps to improve the space utilization rate in the battery device 100 .

[0153] In some embodiments with a mounting slot and a third connecting sub-portion 3232, see Figure 4 and Figure 5 , the third connecting sub-portion 3232 is located at one side of the transfer portion 322 along the second direction.

[0154] In some embodiments, see Figure 3 and Figure 4 The wires 32 are spaced apart from each other to reduce the probability of short circuits between the wires 32 .

[0155] In some embodiments, see Figures 3 to 6 The wire 32 is located at one end of the connector 31 along the first direction, and the wires 32 are arranged at intervals along the second direction. The sampling component 30 also includes an insulating coating 33, a transition portion 322 and a gathering portion 321 of a single wire 32, both of which are attached to the insulating coating 33 along the third direction, and the first direction, the second direction and the third direction intersect with each other.

[0156] The material of the insulating film 33 has insulating properties.

[0157] In this way, the insulating coating 33 can help reduce the risk of the transition portion 322 and the convergence portion 321 respectively contacting external objects and causing short circuits, unstable signal transmission and other problems; the adhesion and friction between the insulating coating 33 and the wire 32 can also be used to reduce the probability of the transition portion 322 and the convergence portion 321 moving and contacting other wires 32.

[0158] The insulating film 33 may be made of at least one of polyimide and polyester.

[0159] In some embodiments, see Figure 7 Both ends of the transition portion 322 and the bunching portion 321 of the single wire 32 along the third direction are in contact with the insulating coating 33 to improve the protective effect of the insulating coating 33 on the transition portion 322 and the bunching portion 321 .

[0160] In some embodiments with a third transfer sub-section, see Figure 6 In the projection plane perpendicular to the third direction, the projection of the third adapter sub-portion is located outside the projection of the insulating coating 33 , so that the third adapter sub-portion is electrically connected to the current collecting member 40 .

[0161] The battery device 100 in a specific embodiment of the present application is as follows:

[0162] The battery device 100 includes a sampling assembly 30, a plurality of battery cells 20 and a plurality of current collectors 40. The current collectors 40 are fixed and electrically connected to the battery cells 20. The sampling assembly 30 includes a connector 31, an insulating coating 33 and a plurality of wires 32. The wires 32 include a bunching portion 321, a transition portion 322 and a fixing portion 323. The two ends of the bunching portion 321 are electrically connected to the first end of the transition portion 322 and the connector 31 respectively. The second end of the transition portion 322 is electrically connected to the fixing portion 323. The fixing portion 323 is electrically connected to the current collector 40. In at least partially adjacent two wires 32, the spacing between the first ends of the two respective ones is a first distance, and the spacing between the connection positions of the bunching portions 321 of the two respective ones and the connector 31 is a second distance, and the first distance is less than the second distance. The first distance ranges from 1 mm to 1.5 mm; the second distance ranges from 1.8 mm to 3 mm. The bunching portion 321 extends in a straight line, and the spacing between at least partially adjacent two bunching portions 321 gradually decreases along the direction from the connector 31 to the transition portion 322. The adapter portion 322 extends in a straight line, and the angle between the extension direction of the bunching portion 321 and the extension direction of the adapter portion 322 does not exceed 30°. Each wire 32 is located at one end of the connector 31 along the first direction and is arranged along the second direction. Among the multiple bunching portions 321, a part of the bunching portions 321 and another part of the bunching portions 321 are symmetrically arranged about a reference plane C10 perpendicular to the second direction. The fixing portion 323 includes a bending sub-portion 3231 and a third connecting sub-portion 3232, the bending sub-portion 3231 connects the second end and the third connecting sub-portion 3232, the bending sub-portion 3231 is bent in a direction close to the connector 31, and the third connecting sub-portion 3232 is electrically connected to the current collector 40. Multiple battery cells 20 are arranged along the first direction, and the adapter portion 322 and the third connecting sub-portion 3232 both extend along the first direction. The wires 32 are arranged at intervals along the second direction. The transition portion 322 and the bundled portion 321 of a single wire 32 are attached to the insulating film 33 along the third direction. The first direction, the second direction and the third direction intersect each other.

[0163] In some embodiments, see Figure 10 and Figure 11 The manufacturing method of the sampling assembly 30 of the embodiment of the present application includes:

[0164] S10: Pull the plurality of wires 32 along the first direction so that the wires 32 pass through the first guide member 50 and the second guide member 60 in sequence. The first guide member 50 and the second guide member 60 are configured as follows:

[0165] The first guide member 50 is provided with a plurality of first guide grooves 50a extending along the first direction, the plurality of first guide grooves 50a are arranged along the second direction and the interval between two adjacent first guide grooves 50a is a fourth distance, and the first guide groove 50a can pass a wire 32;

[0166] The second guide member 60 is provided with a plurality of first guide grooves 50a extending in the first direction. The plurality of second guide grooves 60a are arranged in the second direction, and the distance between two adjacent second guide grooves 60a is a third distance. A wire 32 can pass through the second guide groove 60a.

[0167] The first guide member 50 and the second guide member 60 are spaced apart in the first direction, and the second guide member 60 is arranged downstream of the first guide member 50 along the pulling direction of the guide. The third distance is less than the fourth distance. That is, L3 < L4.

[0168] In this way, after the wire 32 passes through the second guide groove 60a, the distance between two adjacent wires 32 is reduced compared with that before entering the first guide groove 50a.

[0169] The part of the wire 32 located between the first guide member 50 and the second guide member 60 forms a converging portion 321.

[0170] One side of the second guide groove 60a is open along the third direction, so that the part of the wire 32 located in the second guide groove 60a can enter and exit the second guide groove 60a along the third direction.

[0171] S20: Bond the insulating film 33 to the wire 32 along the third direction to fix each wire 32.

[0172] S30: Bend a part of the end of the wire 32 away from the second guide member 60 toward the second guide member 60 so that this part forms a fixing portion 323.

[0173] It can be understood that the part of the wire 32 between the position where it enters the second guide member 60 and the position where it is connected to the fixing portion 323 forms a transition portion 322.

[0174] S40: Cut off the wire 32 at the position where the wire 32 extends out of the first guide member 50, and connect the cut-off position of the wire 32 to the connector 31.

[0175] The embodiment of the present application further provides an energy storage device, and this energy storage device includes the battery device 100 in any one of the foregoing embodiments.

[0176] In this way, it is beneficial to make the structure of the battery device 100 more compact, and further beneficial to make the structure of the energy storage device more compact.

[0177] The embodiment of the present application further provides an electrical device, and this electrical device includes the battery device 100 or the energy storage device in any one of the foregoing embodiments.

[0178] In this way, it is beneficial to make the structure of the electrical device more compact and improve the space utilization rate of the electrical device.

[0179] The embodiment of the present application also provides a sampling assembly 30 for being electrically connected to a current collecting member 40 in a battery device 100. The sampling assembly 30 includes a connector 31 and a plurality of wires 32. The wires 32 include a gathering portion 321 and a transition portion 322. The two ends of the gathering portion 321 are electrically connected to a first end of the transition portion 322 and the connector 31, respectively. The second end of the transition portion 322 is electrically connected to the current collecting member 40. In at least partially adjacent two wires 32, the spacing between the first ends of the two respective ones is a first distance, and the spacing between the connection positions of the gathering portions 321 of the two respective ones and the connector 31 is a second distance. The first distance is smaller than the second distance.

[0180] In this way, the transition parts 322 of each wire 32 can be gathered together and the gaps between them can be reduced, which is beneficial to reducing the space occupied by all the transition parts 322; on the other hand, it is beneficial to adapt the wire 32 to the original connector 31, thereby eliminating the need to redesign a new connector 31, which is beneficial to reducing production costs.

[0181] In some embodiments, the convergent portion 321 extends in a straight line, and along the direction from the connector 31 to the adapter portion 322 , the distance between at least some adjacent convergent portions 321 gradually decreases.

[0182] In this way, the straight extension of the convergence portion 321 is conducive to simplifying the manufacturing process of the convergence portion 321, so that the convergence portion 321 does not need to be bent, which is conducive to reducing the risk of cracking, breaking and other problems of the convergence portion 321 due to bending stress.

[0183] In some embodiments, the wire 32 further includes a fixing portion 323 , which is fixed to and electrically connected to the current collecting member 40 , and at least a portion of the fixing portion 323 is bent, extended, and electrically connected to the second end.

[0184] In this way, the deformation caused by the bending part of the fixing part 323 allows the shape and size of the fixing part 323 to change to adapt to the displacement caused by the current collecting part 40, which is beneficial for the position of the second end of the transition part 322 to remain unchanged, thereby reducing the risk of damage to the transition part 322 and the gathering part 321 due to the pulling force, which is beneficial for improving the service life of the wire 32.

[0185] The various embodiments / implementations provided in this application can be combined with each other without causing any contradiction.

[0186] The above are only preferred embodiments of the present application and are not intended to limit the embodiments in the present application. For those skilled in the art, the embodiments of the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A battery device, characterized in that: The battery device comprises: Multiple current collectors; A sampling assembly includes a connector and a plurality of conductors, wherein the conductors include a gathering portion and a transition portion, wherein two ends of the gathering portion are electrically connected to a first end of the transition portion and the connector respectively, and a second end of the transition portion is electrically connected to the current collecting member, and in at least partially adjacent two of the conductors, a spacing between the first ends of the two conductors is a first distance, and a spacing between connection positions of the gathering portions of the two conductors and the connector is a second distance, and the first distance is smaller than the second distance.

2. The battery device according to claim 1, characterized in that: The converging portion extends in a straight line, and along the direction from the connector to the transition portion, the distance between at least two adjacent converging portions gradually decreases.

3. The battery device according to claim 1, characterized in that: The gathering portion includes a first connecting sub-portion, which extends linearly and is electrically connected to the first end. The transition portion includes a second connecting sub-portion, which includes the first end and extends linearly in a direction away from the connector. The angle between the extension direction of the first connecting sub-portion and the extension direction of the second connecting sub-portion does not exceed 30°.

4. The battery device according to claim 1, characterized in that: Each of the wires is located at one end of the connector along a first direction and is arranged along a second direction, the first direction intersects the second direction, and among the multiple bunching portions, a portion of the bunching portions and another portion of the bunching portions are arranged symmetrically with respect to a reference plane perpendicular to the second direction.

5. The battery device according to claim 1, characterized in that: The first distance ranges from 1 mm to 1.5 mm; And / or, the second distance ranges from 1.8 mm to 3 mm.

6. The battery device according to claim 1, characterized in that: The lead further includes a fixing portion, the fixing portion is fixed to and electrically connected to the current collecting member, at least a portion of the fixing portion is bent and extended, and the fixing portion is electrically connected to the second end.

7. The battery device according to claim 6, characterized in that: The transition portion extends straightly, the fixing portion includes a bending sub-portion and a third connecting sub-portion, the bending sub-portion connects the second end and the third connecting sub-portion, the bending sub-portion bends toward a direction close to the connector, and the third connecting sub-portion is electrically connected to the current collecting member.

8. The battery device according to claim 7, characterized in that: The battery device further includes a plurality of battery cells, the current collector fixes and electrically connects the battery cells, the plurality of battery cells are arranged along a first direction, and the transition portion and the third connecting sub-portion both extend along the first direction.

9. The battery device according to claim 1, characterized in that: The wire is located at one end of the connector along the first direction, and the wires are arranged at intervals along the second direction. The sampling component also includes an insulating coating. The transition part and the gathering part of a single wire are both attached to the insulating coating along the third direction, and the first direction, the second direction and the third direction intersect with each other.

10. An energy storage device, characterized in that: A battery device comprising any one of claims 1 to 9.

11. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 9 or the energy storage device according to claim 10.

12. A sampling assembly, characterized in that: The sampling component is used to be electrically connected to a current collecting member in a battery device. The sampling component includes a connector and a plurality of wires. The wires include a gathering portion and a transition portion. Two ends of the gathering portion are electrically connected to a first end of the transition portion and the connector, respectively. A second end of the transition portion is electrically connected to the current collecting member. In at least partially adjacent two of the wires, a spacing between the first ends of each of the two wires is a first distance, and a spacing between the connection positions of the gathering portions of each of the two wires and the connector is a second distance. The first distance is smaller than the second distance.

13. The sampling assembly according to claim 12, characterized in that: The converging portion extends in a straight line, and along the direction from the connector to the transition portion, the distance between at least two adjacent converging portions gradually decreases.

14. The sampling assembly according to claim 12, characterized in that: The lead further includes a fixing portion, which is fixed to and electrically connected to the current collecting member, and at least a portion of the fixing portion is bent, extends, and is electrically connected to the second end.

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