Battery module, confluence component, battery device, power utilization device, energy storage device and system

Abstract

The embodiment of the utility model discloses a battery module, a confluence component, a battery device, a power utilization device, an energy storage device and a system. The battery module comprises a first battery monomer, a second battery monomer and the confluence component, the first battery cell includes a first electrode terminal. And a second battery cell including a second electrode terminal. The confluence component comprises a first connecting part, a second connecting part and a first overcurrent part, the first connecting part is electrically connected with the first electrode terminal, the second connecting part is electrically connected with the second electrode terminal, and the first overcurrent part is located between the first connecting part and the second connecting part and electrically connected with the first connecting part and the second connecting part; the thickness of the first overflowing part is larger than that of the first connecting part and that of the second connecting part, and therefore the heat loss of the confluence component can be reduced.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery module, a busbar component, a battery device, an electrical device, an energy storage device, and a system. Background Technology

[0002] Battery cells in a battery device or battery module are typically connected in series or parallel via multiple busbars. The structure of the busbars affects the overall current carrying capacity of the battery device or battery module. However, the current sampled busbars have high heat loss, which restricts the current carrying capacity of the battery module.

[0003] Therefore, how to reduce the heat loss of the busbar components has become an urgent problem to be solved. Utility Model Content

[0004] This application provides a battery module, a busbar component, a battery device, an electrical device, an energy storage device, and a system. Reducing the heat loss of the busbar component is an urgent problem to be solved.

[0005] In a first aspect, a battery module is provided, including a first battery cell, a second battery cell, and a current-carrying component. The first battery cell includes a first electrode terminal. The second battery cell includes a second electrode terminal. The current-carrying component includes a first connecting portion, a second connecting portion, and a first current-carrying portion. The first connecting portion is electrically connected to the first electrode terminal, the second connecting portion is electrically connected to the second electrode terminal, and the first current-carrying portion is located between the first connecting portion and the second connecting portion and electrically connected to the first connecting portion and the second connecting portion; wherein the thickness of the first current-carrying portion is greater than the thickness of the first connecting portion and the second connecting portion.

[0006] In the technical solution provided in this application embodiment, the busbar component is electrically connected to the first electrode terminal and the second electrode terminal, and the thickness of the first current-passing part is greater than the thickness of the first connecting part and the second connecting part. On the one hand, the local thickness of the busbar component increases the cross-sectional area of ​​the busbar component, thereby enhancing the current-passing capacity of the busbar component and reducing the heat loss of the battery module.

[0007] On the other hand, the first flow passage is disposed between the first connection and the second connection, and the structure of the busbar component is modularized, thereby reducing the processing difficulty of the busbar component and increasing the production capacity of the battery module.

[0008] In some embodiments, the battery module further includes: a sampling component electrically connected to a first current-carrying section; and a control component electrically connected to the sampling component to obtain information about a first battery cell and / or a second battery cell.

[0009] In some embodiments, a first groove is provided on the surface of the first current-passing section away from the surface of the first battery cell, and the sampling component is electrically connected to the bottom wall of the first groove.

[0010] In the technical solution provided in this application embodiment, a first groove is provided on the surface of the first current-flowing part away from the first battery cell. The sampling component is electrically connected to the bottom wall of the first groove, so that the sampling component can be at least partially accommodated in the first groove. This reduces the possibility of interference between the sampling component and other components in the battery module due to the large thickness of the first current-flowing part, thereby improving the reliability of the battery module.

[0011] In some embodiments, the depth d1 of the first groove satisfies: 1mm≤d1≤5mm.

[0012] In the technical solution provided in this application embodiment, the depth d1 of the first groove satisfies: 1mm≤d1≤5mm. On the one hand, the depth of the first groove can accommodate the sampling component, thereby reducing the possibility of interference between the sampling component and other components in the battery module. On the other hand, the depth of the first groove is not too large, and the overall thickness of the first flow passage is still relatively large, so the heat loss of the busbar component is still kept at a low level, thereby improving the reliability of the battery module.

[0013] In some embodiments, the first connecting portion and the second connecting portion are disposed along a first direction, and the dimension d2 of the first groove along the first direction satisfies: 5mm≤d2≤30mm.

[0014] In the technical solution provided in this application embodiment, the dimension d2 of the first groove along the first direction satisfies: 5mm≤d2≤30mm. On the one hand, the width of the first groove is sufficient to accommodate the sampling component. On the other hand, the area occupied by the first groove is not too large, thereby reducing the heat loss of the busbar component.

[0015] In some embodiments, a first arched portion is provided between the first connecting portion and / or the second connecting portion and the first flow passage portion, and the first arched portion arches along the thickness direction of the busbar component.

[0016] In the technical solution provided in the embodiments of this application, a first arched portion is provided between the first connecting portion and / or the second connecting portion of the busbar component and the first overcurrent portion. When the busbar component is subjected to an expansion force, the first arched portion can buffer the expansion force on the busbar component, thereby reducing the possibility of the busbar component being pulled off, thereby improving the reliability of the battery module.

[0017] In some embodiments, the polarities of the first electrode terminal and the second electrode terminal are opposite.

[0018] In the technical solution provided in this application embodiment, the polarities of the first electrode terminal and the second electrode terminal are opposite. In the series circuit, a thicker first overcurrent section is provided in the area where the current is large in the busbar component, which can improve the efficiency of reducing heat loss, thereby improving the round-trip efficiency of the battery module.

[0019] In some embodiments, the battery module further includes: a third battery cell including a third electrode terminal; the busbar further includes a third connection portion and a second current-passing portion, the third connection portion being electrically connected to the third electrode terminal, and the second current-passing portion being located between the third connection portion and the first connection portion and electrically connected to the first connection portion and the third connection portion.

[0020] In the technical solution provided in this application embodiment, the third connecting part is electrically connected to the third electrode terminal, the second overcurrent part is located between the third connecting part and the first connecting part and is electrically connected to the first connecting part and the third connecting part, the busbar component connects multiple battery cells, the busbar component facilitates modular assembly of the battery module and adapts to the layout requirements of different battery cell sizes, and can improve the assembly efficiency of the battery module.

[0021] In some embodiments, the second flow passage is provided with a second arched portion, which arches along the thickness direction of the confluence member.

[0022] In the technical solution provided in this application embodiment, the second flow passage of the busbar component is provided with a second arched portion. When the busbar component is subjected to an expansion force, the second arched portion can buffer the expansion force on the busbar component, thereby reducing the possibility of the busbar component being pulled off, thereby improving the reliability of the battery module.

[0023] In some embodiments, the polarity of the third electrode terminal is the same as that of the first electrode terminal, and the third electrode terminal and the first electrode terminal are disposed along a first direction; wherein, the dimension of the second flow portion along the second direction is smaller than the dimension of the third connection portion along the second direction, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the busbar component.

[0024] In the technical solution provided in this application embodiment, the third electrode terminal has the same polarity as the first electrode terminal. The current flowing between the third electrode terminal and the first electrode terminal is less than the current flowing between the first electrode terminal and the second electrode terminal. Therefore, the smaller size of the second current-passing portion along the second direction compared to the third connecting portion enhances the ability of the busbar component to resist the expansion force of the battery cell. On the other hand, in the event of thermal runaway of the battery cell, the second current-passing portion can quickly accumulate heat and melt, effectively reducing the possibility of thermal runaway propagation, thereby improving the reliability of the battery module.

[0025] In some embodiments, the battery module further includes: a fourth battery cell including a fourth electrode terminal, wherein the polarity of the fourth electrode terminal is the same as that of the third electrode terminal; the busbar further includes a fourth connection portion, which is electrically connected to the fourth electrode terminal and electrically connected to the third connection portion; wherein the thickness of the second current-passing portion is greater than the thickness of the first connection portion and the third connection portion.

[0026] In the technical solution provided in this application embodiment, the fourth battery cell, the third battery cell, and the first battery cell are connected in parallel. The current passing through the second current-passing section is the sum of the current of the third battery cell and the current flowing between the third battery cell and the fourth battery cell. Therefore, increasing the thickness of the second current-passing section can more effectively improve the current-passing efficiency of the battery module, thereby improving the round-trip efficiency of the battery module.

[0027] In some embodiments, the first connecting portion and the second connecting portion are provided with a first fixing hole, and the battery module further includes: a bracket, a busbar component is disposed on one side of the bracket, the bracket includes a plurality of fixing portions, the plurality of fixing portions at least partially extending between the first connecting portion and the first battery cell and between the second connecting portion and the second battery cell; the fixing portions are provided with a protruding structure, the protruding structure is disposed opposite to the first fixing hole and passes through the first fixing hole.

[0028] In the technical solution provided in this application embodiment, a first fixing hole is provided in the first connecting part and the second connecting part, so as to cooperate with the protruding structure formed by the fixing part of the bracket, the busbar component can be fixed to the bracket, and the modular assembly of the busbar component can be realized, thereby improving the assembly efficiency of the battery module.

[0029] In some embodiments, the thickness d3 of the first flow passage satisfies: 4mm≤d3≤10mm.

[0030] In the technical solution provided in this application embodiment, the thickness d3 of the first current-passing part satisfies: 4mm≤d3≤10mm. On the one hand, a thicker first current-passing part can reduce its own resistance and reduce the heat generation when current passes through the first current-passing part, thereby reducing heat loss. On the other hand, the first current-passing part is not too thick, thereby reducing the height of the battery module and increasing the energy density of the battery module.

[0031] In some embodiments, the thickness d4 of the first connecting portion and / or the second connecting portion satisfies: 1mm≤d4≤5mm.

[0032] In the technical solution provided in this application embodiment, the thickness d4 of the first connecting part and / or the second connecting part satisfies: 1mm≤d4≤5mm. On the one hand, the first connecting part and / or the second connecting part has a certain thickness, resulting in better current flow efficiency. On the other hand, the first connecting part and / or the second connecting part is not too thick, thereby improving the welding strength between the first connecting part and the first electrode terminal and / or the second connecting part and the second electrode terminal, thereby improving the reliability of the battery module.

[0033] In a second aspect, a battery device is provided, comprising a battery module as implemented in any of the first aspects.

[0034] Thirdly, a current-passing component is provided, including a first connecting portion, a second connecting portion, and a first current-passing portion. The first connecting portion is electrically connected to a first electrode terminal of a first battery cell, and the second connecting portion is electrically connected to a second electrode terminal of a second battery cell. The first current-passing portion is located between the first connecting portion and the second connecting portion and is electrically connected to the first connecting portion and the second connecting portion. The thickness of the first current-passing portion is greater than the thickness of the first connecting portion and the second connecting portion.

[0035] Fourthly, an electrical device is provided, comprising: a battery device as described in any of the second aspects, wherein the battery device is used to provide electrical energy.

[0036] In some embodiments, the electrical device is a vehicle, a ship, or a spacecraft.

[0037] Fifthly, an energy storage device is provided, comprising: a battery device as described in any of the second aspects, the battery device being used to store or provide electrical energy.

[0038] A sixth aspect provides an energy storage system, comprising: a power conversion device; and an energy storage device as described in the fifth aspect, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device. Attached Figure Description

[0039] Figure 1 A schematic diagram of the structure of a vehicle according to one embodiment of this application is shown;

[0040] Figure 2 An exploded structural diagram of a battery device according to an embodiment of this application is shown;

[0041] Figure 3 This paper shows a partial top view of a battery device or battery module provided in a certain embodiment of the present application;

[0042] Figure 4 This illustration shows a partial front view of a battery device or battery module according to a certain embodiment of the present application;

[0043] Figure 5 A perspective view of a busbar component in a battery device or battery module according to a certain embodiment of this application is shown;

[0044] Figure 6 A partial top view of a battery device or battery module according to another embodiment of this application is shown;

[0045] Figure 7 A perspective view of a busbar component in a battery device or battery module provided in another embodiment of this application is shown;

[0046] Figure 8A front view schematic diagram of a busbar component in a battery device or battery module provided in another embodiment of this application is shown;

[0047] Figure 9 A top view schematic diagram of a busbar component in a battery device or battery module provided in another embodiment of this application is shown;

[0048] Figure 10 A perspective view of a busbar component in a battery device or battery module provided in another embodiment of this application is shown;

[0049] Figure 11 A front view schematic diagram of a busbar component in a battery device or battery module provided in another embodiment of this application is shown;

[0050] Figure 12 A top view schematic diagram of a busbar component in a battery device or battery module provided in another embodiment of this application is shown;

[0051] Figure 13 This illustration shows a partial top view of a battery device or battery module provided in yet another embodiment of this application;

[0052] Figure 14 A partial front view schematic diagram of a battery device or battery module provided in another embodiment of this application is shown;

[0053] Figure 15 A perspective view of a busbar component in a battery device or battery module according to another embodiment of this application is shown;

[0054] Figure 16 A perspective view of another busbar component in a battery device or battery module provided in yet another embodiment of this application is shown;

[0055] Figure 17 A partial front view schematic diagram of a battery device or battery module provided in another embodiment of this application is shown;

[0056] Figure 18 Other possible perspective views of a busbar component in a battery device or battery module provided in yet another embodiment of this application are shown;

[0057] Figure 19 A partial top view schematic diagram of a battery device or battery module provided in certain embodiments of this application is shown.

[0058] Figure label:

[0059] 10-Battery device; 101-Sampling component; 102-Control component; 11-Box; 111-First box section; 112-Second box section; 130-Bracket; 131-Fixing part; 1311-Protruding structure; 20-Battery cell; 21-First battery cell; 211-First electrode terminal; 22-Second battery cell; 221-Second electrode terminal; 23-Third battery cell; 231-Third electrode terminal; 24-Fourth battery cell; 241-Fourth electrode terminal; 30-Controller; 40-Motor; 200-Battery cell assembly; 300-Buffer component; 310-First connection part; 320-Second connection part; 330-First current passage part; 331-First groove; 340-First arched part; 350-Third connection part; 360-Second current passage part; 361-Second arched part; 370-Fourth connection part; 380-First fixing hole; 390-Positioning hole. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0062] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0063] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0066] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0067] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0068] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0069] 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.

[0070] 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.

[0071] In some embodiments, at least one electrode terminal is provided on the casing of the battery cell, 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.

[0072] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly includes multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0073] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0074] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0075] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0076] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0077] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0078] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0079] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0080] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0081] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0082] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery clusters may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0083] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0084] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0085] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0086] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0087] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0088] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes auxiliary battery management units, integrated switches, and other modules.

[0089] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and an Ethernet and fiber optic conversion module.

[0090] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0091] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0092] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0093] In a battery device, individual battery cells are typically connected in series or parallel via multiple busbars. The structure of the busbars affects the overall current carrying capacity of the battery device. However, the current sampled busbars have high heat loss, which limits the current carrying capacity of the battery module.

[0094] Therefore, how to reduce the heat loss of the busbar components has become an urgent problem to be solved.

[0095] This application provides a battery module including a first battery cell, a second battery cell, and a current-carrying component. The first battery cell includes a first electrode terminal. The second battery cell includes a second electrode terminal. The current-carrying component includes a first connecting portion, a second connecting portion, and a first current-carrying portion. The first connecting portion is electrically connected to the first electrode terminal, the second connecting portion is electrically connected to the second electrode terminal, and the first current-carrying portion is located between the first connecting portion and the second connecting portion and electrically connected to the first connecting portion and the second connecting portion; wherein the thickness of the first current-carrying portion is greater than the thickness of the first connecting portion and the second connecting portion.

[0096] In the technical solution provided in this application embodiment, the busbar component is electrically connected to the first electrode terminal and the second electrode terminal, and the thickness of the first current-passing part is greater than the thickness of the first connecting part and the second connecting part. On the one hand, the local thickness of the busbar component increases the cross-sectional area of ​​the busbar component, thereby enhancing the current-passing capacity of the busbar component and reducing the heat loss of the battery device.

[0097] On the other hand, the first flow passage is disposed between the first connection and the second connection, and the structure of the busbar component is modularized, thereby reducing the processing difficulty of the busbar component and increasing the production capacity of the battery device.

[0098] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0099] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0100] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0101] For example, such as Figure 1 This illustration shows a structural diagram of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, it can serve as the operating power source for the vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0102] For example, Figure 2 An exploded structural diagram of the battery device 10 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 in this application embodiment can be set according to actual application. For example, the battery cell 20 can be as follows: Figure 2 The prism shape shown, or it could be different. Figure 2 Other shapes are shown, but the embodiments of this application are not limited to these.

[0103] It should be understood that, such as Figure 2As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate multiple battery cells 20. The housing 11 of this embodiment has a hollow interior, and the multiple battery cells 20 are accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cells 20 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as... Figure 2 As shown, the first housing portion 111 and the second housing portion 112 can both be hollow cuboids with one open side each. The openings of the first housing portion 111 and the second housing portion 112 are opposite to each other, and the first housing portion 111 and the second housing portion 112 are interlocked to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the interlocking of the first housing portion 111 and the second housing portion 112.

[0104] For example, unlike Figure 2 As shown, either the first housing portion 111 or the second housing portion 112 may have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with one opening and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0105] The following is combined with Figures 3 to 5 This application describes a battery device 10 or battery module provided in a certain embodiment.

[0106] Figure 3 This paper shows a partial top view of a battery device 10 or battery module provided in a certain embodiment of the present application; Figure 4 This paper shows a partial front view of a battery device 10 or battery module according to a certain embodiment of the present application; Figure 5 A perspective view of a busbar component 300 in a battery device 10 or battery module provided in a certain embodiment of this application is shown.

[0107] This application provides a battery device 10 or battery module, including a first battery cell 21, a second battery cell 22, and a busbar 300. The first battery cell 21 includes a first electrode terminal 211. The second battery cell 22 includes a second electrode terminal 221. The busbar 300 includes a first connecting portion 310, a second connecting portion 320, and a first current-passing portion 330. The first connecting portion 310 is electrically connected to the first electrode terminal 211, the second connecting portion 320 is electrically connected to the second electrode terminal 221, and the first current-passing portion 330 is located between the first connecting portion 310 and the second connecting portion 320 and is electrically connected to the first connecting portion 310 and the second connecting portion 320; wherein the thickness of the first current-passing portion 330 is greater than the thickness of the first connecting portion 310 and the second connecting portion 320.

[0108] The first battery cell 21 and the second battery cell 22 can be connected in parallel or in series, and the embodiments of this application are not limited thereto.

[0109] The first electrode terminal 211 can be either a positive or negative electrode terminal; this application embodiment is not limited thereto. The second electrode terminal 221 can also be either a positive or negative electrode terminal; this application embodiment is not limited thereto.

[0110] The bus component 300 can be a component with conductive capabilities. For example, the substrate of the bus component 300 can be metal or other conductive materials. The metal can be copper, aluminum, etc., but the embodiments of this application are not limited thereto.

[0111] The first connecting part 310 is electrically connected to the first electrode terminal 211, and the second connecting part 320 is electrically connected to the second electrode terminal 221. The first connecting part 310 is welded to the first electrode terminal 211, and the second connecting part 320 is welded to the second electrode terminal 221. The embodiments of this application are not limited thereto.

[0112] The first current-passing part 330 is electrically connected to the first connecting part 310 and the second connecting part 320, and the first current-passing part 330, the first connecting part 310 and the second connecting part 320 can be an integral structure. Other structures, such as an arched structure, can also be provided between the first current-passing part 330, the first connecting part 310 and the second connecting part 320.

[0113] The thickness of the first current-passing part 330 is greater than the thickness of the first connecting part 310 and the second connecting part 320. The cross-sectional area of ​​the first current-passing part 330 is increased, that is, the current-passing area of ​​the first current-passing part 330 is increased. Since the resistance of the conductor is inversely proportional to the cross-sectional area, the resistance of the busbar component 300 is reduced. When current passes through the busbar component 300, its own heat generation can be reduced, thereby reducing its own loss, and thus significantly improving the round-trip efficiency of the battery device 10 or battery module.

[0114] The round-trip efficiency (RTE) of the battery device 10 or battery module is a key indicator of the energy conversion efficiency of the battery device 10 or battery module, representing the proportion of energy lost during the entire process from charging to discharging. For example, a RTE of 90% for the battery device 10 or battery module means that for every 100 units of electrical energy input, 90 units can be recovered during discharge.

[0115] The first flow passage 330 is disposed between the first connecting part 310 and the second connecting part 320, thereby enabling the structure of the busbar component 300 to be modularized. That is, the thinner first connecting part 310 and the second connecting part are disposed on both sides of the thicker first busbar component. The busbar component 300 has low processing complexity. Multiple busbar component 300 profiles can be processed by die extrusion process, and multiple busbar component 300s can be processed at one time by cutting step, which can improve the processing efficiency of the busbar component 300.

[0116] In the technical solution provided in this application embodiment, the busbar component 300 is electrically connected to the first electrode terminal 211 and the second electrode terminal 221, and the thickness of the first current-passing portion 330 is greater than the thickness of the first connecting portion 310 and the second connecting portion 320. On the one hand, the local increase in thickness of the busbar component 300 increases the cross-sectional area of ​​the busbar component 300, thereby enhancing the current-passing capacity of the busbar component 300 and reducing the heat loss of the battery device 10 or the battery module.

[0117] On the other hand, the first flow passage 330 is disposed between the first connecting part 310 and the second connecting part 320, and the structure of the busbar component 300 is modularized, thereby reducing the processing difficulty of the busbar component 300 and increasing the production capacity of the battery device 10 or battery module.

[0118] The following is combined with Figures 6 to 9 This application describes a battery device 10 or battery module provided in another embodiment.

[0119] Figure 6 A partial top view of a battery device 10 or battery module according to another embodiment of this application is shown; Figure 7 A perspective view of a busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application is shown; Figure 8 A front view schematic diagram of a busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application is shown; Figure 9 A top view schematic diagram of a busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application is shown.

[0120] In some embodiments, the battery device 10 or battery module further includes a sampling component 101 and a control component 102, wherein the sampling component 101 is electrically connected to the first overcurrent section 330. The control component 102 is electrically connected to the sampling component 101 to obtain information about the first battery cell 21 and / or the second battery cell 22.

[0121] The sampling component 101 may be a component that acquires state information such as voltage, current, and temperature of the battery cell 20 in the battery device 10 or battery module, but this application embodiment does not limit it.

[0122] The sampling component 101 is electrically connected to the first overcurrent section 330 instead of the first connection section 310 or the second connection section 320. This reduces the possibility of the sampling component 101 interfering with the connection process when connecting the busbar 300 to the first electrode terminal 211 or the second electrode terminal 221.

[0123] In some embodiments, the first flow portion 330 has a first groove 331 on the surface away from the first battery cell 21, and the sampling component 101 is electrically connected to the bottom wall of the first groove 331.

[0124] Because the first flow passage 330 is relatively thick, when the sampling component 101 is connected to the first flow passage 330, the connection position of the sampling component 101 is far from the battery cell 20, which may cause interference with the battery device 10 or other structures within the battery module. When the sampling component 101 is connected to the bottom wall of the first groove 331, the local thickness at the connection point of the sampling component 101 is reduced, and at least a portion of the sampling component 101 can be accommodated within the first groove 331.

[0125] In the technical solution provided in this application embodiment, the first current-flowing part 330 is provided with a first groove 331 on the surface away from the first battery cell 21. The sampling component 101 is electrically connected to the bottom wall of the first groove 331, so that the sampling component 101 can be at least partially accommodated in the first groove 331. This reduces the possibility of interference between the sampling component 101 and other components in the battery device 10 or battery module due to the large thickness of the first current-flowing part 330. As a result, the reliability of the battery device 10 or battery module can be improved.

[0126] In some embodiments, the depth d1 of the first groove 331 satisfies: 1mm≤d1≤5mm.

[0127] In the technical solution provided in this application embodiment, the depth d1 of the first groove 331 satisfies: 1mm≤d1≤5mm. On the one hand, the depth of the first groove 331 can accommodate the sampling component 101, thereby reducing the possibility of interference between the sampling component 101 and other components in the battery device 10 or battery module. On the other hand, the depth of the first groove 331 is not too large, and the overall thickness of the first flow passage 330 is still relatively large, so the heat loss of the busbar component 300 is still maintained at a low level, thereby improving the reliability of the battery device 10 or battery module.

[0128] Furthermore, the depth d1 of the first groove 331 can satisfy: 1.5mm≤d1≤4mm. Within this range, the depth of the first groove 331 can effectively accommodate the sampling component 101, thereby further reducing the possibility of interference between the sampling component 101 and other components within the battery device 10 or battery module. On the other hand, the increased local thickness of the first flow passage 330 can reduce the heat loss of the busbar component 300.

[0129] The depth d1 of the first groove 331 can also take other values. For example, the depth d1 of the first groove 331 can take any one or any two of the following values: 1.0mm, 1.25mm, 1.5mm, 1.75mm, 2.0mm, 2.25mm, 2.5mm, 2.75mm, 3.0mm, 3.25mm, 3.5mm, 3.75mm, 4.0mm, 4.25mm, 4.5mm, 4.75mm and 5.0mm.

[0130] In some embodiments, the first connecting portion 310 and the second connecting portion 320 are arranged along a first direction, and the dimension d2 of the first groove 331 along the first direction satisfies: 5mm≤d2≤30mm.

[0131] In the technical solution provided in this application embodiment, the dimension d2 of the first groove 331 along the first direction satisfies: 5mm≤d2≤30mm. On the one hand, the width of the first groove 331 is sufficient to accommodate the sampling component 101. On the other hand, the area occupied by the first groove 331 is not too large, thereby reducing the heat loss of the busbar component 300.

[0132] The following is combined with Figures 10 to 12 This application describes a battery device 10 or battery module provided in another embodiment.

[0133] Figure 10 A perspective view of a busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application is shown; Figure 11 This illustration shows a front view of a busbar component 300 in a battery device 10 or battery module according to another embodiment of this application. Figure 12 This is a top view of a busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application.

[0134] In some embodiments, a first arched portion 340 is provided between the first connecting portion 310 and / or the second connecting portion 320 and the first flow passage portion 330, and the first arched portion 340 arches along the thickness direction of the confluence member 300.

[0135] The first arched part 340 can be understood as an arched protrusion structure.

[0136] During the charging and discharging process of the battery device 10 or battery module, the battery cell 20 may expand, thereby generating an expansion force. The expansion force pulls on the busbar component 300 connected to the electrode terminals. When the expansion force is too large, the busbar component 300 may be at risk of being pulled off.

[0137] By providing an arched protrusion structure between the first connecting portion 310 and / or the second connecting portion 320 and the first flow passage portion 330, the first arched portion 340 can buffer the expansion force on the busbar component 300 when it is subjected to expansion force, thereby reducing the possibility of the busbar component 300 being pulled apart.

[0138] In the technical solution provided in this application embodiment, a first arched portion 340 is provided between the first connecting portion 310 and / or the second connecting portion 320 of the busbar component 300 and the first flow passage portion 330. When the busbar component 300 is subjected to an expansion force, the first arched portion 340 can buffer the expansion force on the busbar component 300, thereby reducing the possibility of the busbar component 300 being pulled off, thereby improving the reliability of the battery device 10 or the battery module.

[0139] In some embodiments, the polarities of the first electrode terminal 211 and the second electrode terminal 221 are opposite.

[0140] The first electrode terminal 211 and the second electrode terminal 221 have opposite polarities. That is, the first battery cell 21 and the second battery cell 22 are connected in series through the busbar 300, and the current of the entire circuit passes through the first overcurrent section 330. The current passing through the first overcurrent section 330 is relatively large.

[0141] In the technical solution provided in this application embodiment, the polarities of the first electrode terminal 211 and the second electrode terminal 221 are opposite. In the series circuit, a thicker first overcurrent portion 330 is provided in the area where the current is large in the busbar 300, which can improve the efficiency of reducing heat loss, thereby improving the round-trip efficiency of the battery device 10 or battery module.

[0142] The following is combined with Figures 13 to 16This application describes a battery device 10 or battery module provided in another embodiment.

[0143] Figure 13 This illustration shows a partial top view of a battery device 10 or battery module according to another embodiment of this application; Figure 14 A partial front view schematic diagram of a battery device 10 or battery module provided in another embodiment of this application is shown; Figure 15 A perspective view of a busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application is shown; Figure 16 A perspective view of another busbar component 300 in a battery device 10 or battery module provided in another embodiment of this application is shown.

[0144] In some embodiments, the battery device 10 or battery module further includes a third battery cell 23, including a third electrode terminal 231. The busbar component 300 also includes a third connection portion 350 and a second current-passing portion 360, the third connection portion 350 being electrically connected to the third electrode terminal 231, and the second current-passing portion 360 being located between the third connection portion 350 and the first connection portion 310 and electrically connected to the first connection portion 310 and the third connection portion 350.

[0145] The busbar component 300 is also connected to a third battery cell 23. The busbar component 300 can connect multiple battery cells 20 at the same time, thereby reducing the complexity of the connection lines, facilitating the modular assembly of the battery device 10 or battery module, and adapting to the layout requirements of different battery cell sizes 20.

[0146] In the technical solution provided in this application embodiment, the third connecting part 350 is electrically connected to the third electrode terminal 231, the second overcurrent part 360 is located between the third connecting part 350 and the first connecting part 310 and electrically connected to the first connecting part 310 and the third connecting part 350, the busbar component 300 connects multiple battery cells 20, the busbar component 300 facilitates the modular assembly of the battery device 10 or battery module, and adapts to the layout requirements of different battery cell sizes 20, thereby improving the assembly efficiency of the battery device 10 or battery module.

[0147] In some embodiments, the second flow portion 360 is provided with a second arched portion 361, which arches along the thickness direction of the confluence member 300.

[0148] In the technical solution provided in this application embodiment, the second flow passage 360 ​​of the busbar component 300 is provided with a second arched portion 361. When the busbar component 300 is subjected to an expansion force, the second arched portion 361 can buffer the expansion force subjected to the busbar component 300, thereby reducing the possibility of the busbar component 300 being pulled off, thereby improving the reliability of the battery device 10 or battery module.

[0149] In some embodiments, the polarity of the third electrode terminal 231 is the same as that of the first electrode terminal 211, and the third electrode terminal 231 and the first electrode terminal 211 are disposed along a first direction; wherein, the dimension of the second flow portion 360 along the second direction is smaller than the dimension of the third connection portion 350 along the second direction, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the busbar 300.

[0150] The third electrode terminal 231 has the same polarity as the first electrode terminal 211, that is, the third battery cell 23 is connected in parallel with the first battery cell 21. The current passing through the parallel connection is generally smaller than the current passing through the series connection, which can reduce the width of the second overcurrent section 360, thereby enhancing the ability of the busbar component 300 to resist the expansion force of the battery cell 20.

[0151] On the other hand, the width of the second flow passage 360 ​​is reduced and the resistance at the second flow passage 360 ​​is increased. In the event of thermal runaway of the battery cell 20, the second flow passage 360 ​​can quickly accumulate heat and melt, which can effectively reduce the possibility of thermal runaway propagation.

[0152] In the technical solution provided in this application embodiment, the third electrode terminal 231 has the same polarity as the first electrode terminal 211. The current passing between the third electrode terminal 231 and the first electrode terminal 211 is less than the current passing between the first electrode terminal 211 and the second electrode terminal 221. Therefore, the size of the second current-passing portion 360 along the second direction is smaller than that of the third connecting portion 350, which can enhance the ability of the busbar component 300 to resist the expansion force of the battery cell 20. On the other hand, in the event of thermal runaway of the battery cell 20, the second current-passing portion 360 can quickly accumulate heat and melt, which can effectively reduce the possibility of thermal runaway propagation, thereby improving the reliability of the battery device 10 or battery module.

[0153] The following is combined with Figure 17 and Figure 18 This application also provides a battery device 10 or battery module according to another embodiment.

[0154] Figure 17 A partial front view schematic diagram of a battery device 10 or battery module provided in another embodiment of this application is shown; Figure 18 Other possible perspective views of the busbar component 300 in a battery device 10 or battery module provided in yet another embodiment of this application are shown.

[0155] In some embodiments, the battery device 10 or battery module further includes a fourth battery cell 24, including a fourth electrode terminal 241, wherein the polarity of the fourth electrode terminal 241 is the same as that of the third electrode terminal 231; the busbar component 300 further includes a fourth connection portion 370, which is electrically connected to the fourth electrode terminal 241 and to the third connection portion 350; wherein the thickness of the second current-passing portion 360 is greater than the thickness of the first connection portion 310 and the third connection portion 350.

[0156] The fourth electrode terminal 241 has the same polarity as the third electrode terminal 231. The fourth battery cell 24, the third battery cell 23 and the first battery cell 21 are connected in parallel. The second current-passing part 360 located between the third battery cell 23 and the first battery cell 21 carries the current of both the fourth battery cell 24 and the third battery cell 23. Increasing the thickness of the second current-passing part 360 can further reduce the heat loss of the busbar component 300.

[0157] In the technical solution provided in this application embodiment, the fourth battery cell 24, the third battery cell 23 and the first battery cell 21 are connected in parallel. The current passing through the second current-passing part 360 is the sum of the current of the third battery cell 23 and the current flowing between the third battery cell 23 and the fourth battery cell 24. Therefore, increasing the thickness of the second current-passing part 360 can more effectively improve the current-passing efficiency of the battery device 10 or the battery module, thereby improving the round-trip efficiency of the battery device 10 or the battery module.

[0158] Figure 17 The area between the third connecting portion 350 and the fourth connecting portion 370 is not thickened, but this application embodiment is not limited thereto; for example, as Figure 18 As shown, thickened flow sections can be installed in any flow area, thereby improving the flow efficiency of all flow sections.

[0159] Figure 19 A partial top view schematic diagram of a battery device 10 or battery module provided in certain embodiments of this application is shown.

[0160] In some embodiments, the first connecting portion 310 and the second connecting portion 320 are provided with a first fixing hole 380. The battery device 10 or battery module also includes a bracket 130. The busbar component 300 is disposed on one side of the bracket 130. The bracket 130 includes a plurality of fixing portions 131. The plurality of fixing portions 131 extend at least partially between the first connecting portion 310 and the first battery cell 21 and between the second connecting portion 320 and the second battery cell 22. The fixing portions 131 are provided with a protruding structure 1311. The protruding structure 1311 is disposed opposite to the first fixing hole 380 and passes through the first fixing hole 380.

[0161] The bracket 130 can be used to fix the bus component 300, and the bracket 130 can also be used to fix the wiring harness, such as the sampling wiring harness. The embodiments of this application are not limited thereto.

[0162] The first fixing hole 380 can be a round hole or a square hole. The shape of the first fixing hole 380 is not limited in the embodiments of this application.

[0163] The busbar component 300 can also be fixed to the bracket 130 by riveting, but this embodiment is not limited thereto.

[0164] By providing a first fixing hole 380 in the first connecting part 310 and the second connecting part 320, and a fixing part 131 in the bracket 130, the fixing part 131 is provided with a protruding structure 1311 opposite to the first fixing hole 380, thereby fixing the busbar component 300. Fixing the busbar component 300 to the bracket 130 enables the modular assembly of the busbar component 300, thereby facilitating the modular assembly of the battery device 10 or the battery module.

[0165] In the technical solution provided in this application embodiment, a first fixing hole 380 is provided in the first connecting part 310 and the second connecting part 320, so as to cooperate with the protruding structure 1311 formed by the fixing part 131 of the bracket 130, which can fix the busbar component 300 to the bracket 130, realize the modular assembly of the busbar component 300, thereby improving the assembly efficiency of the battery device 10 or battery module.

[0166] The busbar component 300 can also be provided with positioning holes. For example, as shown in the figure, the first connecting portion 310 and the second connecting portion 320 of the busbar component 300 are provided with positioning holes. During the welding process of the busbar component 300 to the electrode terminals, the positioning holes allow observation of the electrode terminals below. For example, the positioning holes or other marking structures that are configured to cooperate with the electrode terminals can be observed. Furthermore, positioning holes can be provided on both sides of the first connecting portion 310 and the second connecting portion 320. When there are observable differences on both sides of the electrode terminals, positioning can be achieved through the positioning holes on both sides. For example, if one part of the electrode terminal substrate is aluminum and the other part is copper, different colored areas or interfaces can be seen through the positioning holes, thereby enabling machine vision recognition and thus achieving automated welding of the busbar component 300.

[0167] In some embodiments, the thickness d3 of the first flow passage 330 satisfies: 4mm≤d3≤10mm.

[0168] In the technical solution provided in this application embodiment, the thickness d3 of the first current-passing part 330 satisfies: 4mm≤d3≤10mm. On the one hand, a thicker first current-passing part 330 can reduce its own resistance and reduce the heat generation when current passes through the first current-passing part 330, thereby reducing heat loss. On the other hand, the first current-passing part 330 is not too thick, thereby reducing the height of the battery device 10 or battery module and increasing the energy density of the battery device 10 or battery module.

[0169] Furthermore, the thickness d3 of the first current-passing section 330 can satisfy: 5mm≤d3≤8mm. Since the thickness d3 of the first current-passing section 330 is within this range, on the one hand, the lower limit of the current-passing area of ​​the first current-passing section 330 is increased, and the resistance of the first current-passing section is lower, which can improve the current-passing efficiency of the battery device 10 or battery module. On the other hand, the first current-passing section 330 occupies less height space, which can further improve the energy density of the battery device 10 or battery module.

[0170] The thickness d3 of the first flow passage 330 can also take other values. For example, the thickness d3 of the first flow passage 330 can take any one or any two of the following values: 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10.0mm.

[0171] In some embodiments, the thickness d4 of the first connecting portion 310 and / or the second connecting portion 320 satisfies: 1mm≤d4≤5mm.

[0172] In the technical solution provided in this application embodiment, the thickness d4 of the first connecting part 310 and / or the second connecting part 320 satisfies: 1mm≤d4≤5mm. On the one hand, the first connecting part 310 and / or the second connecting part 320 has a certain thickness, resulting in better current flow efficiency. On the other hand, the first connecting part 310 and / or the second connecting part 320 are not too thick, thereby improving the welding strength between the first connecting part 310 and the first electrode terminal 211 and / or the second connecting part 320 and the second electrode terminal 221, thereby improving the reliability of the battery device 10 or the battery module.

[0173] According to certain embodiments of this application, a busbar component 300 is provided, including a first connecting portion 310, a second connecting portion 320, and a first current-passing portion 330. The first connecting portion 310 is electrically connected to the first electrode terminal 211 of a first battery cell 21, and the second connecting portion 320 is electrically connected to the second electrode terminal 221 of a second battery cell 22. The first current-passing portion 330 is located between the first connecting portion 310 and the second connecting portion 320 and is electrically connected to the first connecting portion 310 and the second connecting portion 320. The thickness of the first current-passing portion 330 is greater than the thickness of the first connecting portion 310 and the second connecting portion 320.

[0174] According to certain embodiments of this application, an electrical device is provided, including a battery device 10 or a battery module of any of the above embodiments of this application.

[0175] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery module, characterized by, The battery module comprises: a first battery monomer (21) comprising a first electrode terminal (211); a second battery monomer (22) comprising a second electrode terminal (221); a confluence component (300) comprising a first connecting part (310), a second connecting part (320) and a first overcurrent part (330), the first connecting part (310) is electrically connected with the first electrode terminal (211), the second connecting part (320) is electrically connected with the second electrode terminal (221), and the first overcurrent part (330) is located between the first connecting part (310) and the second connecting part (320) and electrically connects the first connecting part (310) and the second connecting part (320); wherein the thickness of the first overcurrent part (330) is greater than the thickness of the first connecting part (310) and the second connecting part (320).

2. The battery module of claim 1, wherein, The battery module further comprises: a sampling assembly (101) electrically connected with the first overcurrent part (330); a control assembly (102) electrically connected with the sampling assembly (101) to obtain information of the first battery monomer (21) and / or the second battery monomer (22).

3. The battery module of claim 2, wherein, The surface of the first overcurrent part (330) away from the first battery monomer (21) is provided with a first groove (331), and the sampling assembly is electrically connected with the bottom wall of the first groove (331).

4. The battery module of claim 3, wherein, The depth d1 of the first groove (331) satisfies: 1mm≤d1≤5mm.

5. The battery module of claim 3, wherein, The first connecting part (310) and the second connecting part (320) are arranged along a first direction, and the size d2 of the first groove (331) along the first direction satisfies: 5mm≤d2≤30mm.

6. The battery module of claim 1, wherein, A first arch part (340) is arranged between the first connecting part (310) and / or the second connecting part (320) and the first overcurrent part (330), and the first arch part (340) arches along the thickness direction of the confluence component (300).

7. The battery module of claim 1, wherein, The polarity of the first electrode terminal (211) is opposite to that of the second electrode terminal (221).

8. The battery module of claim 1, wherein, The battery module further comprises: a third battery monomer (23) comprising a third electrode terminal (231); The confluence component (300) further comprises a third connecting part (350) and a second overcurrent part (360), the third connecting part (350) is electrically connected with the third electrode terminal (231), and the second overcurrent part (360) is located between the third connecting part (350) and the first connecting part (310) and electrically connects the first connecting part (310) and the third connecting part (350).

9. The battery module of claim 8, wherein, The second overcurrent part (360) is provided with a second arch part (361) which arches along the thickness direction of the confluence component (300).

10. The battery module of claim 8, wherein, The polarity of the third electrode terminal (231) is the same as that of the first electrode terminal (211), and the third electrode terminal (231) and the first electrode terminal (211) are arranged along a first direction; The second flow-through portion (360) has a size along a second direction smaller than a size of the third connecting portion (350) along the second direction, the second direction being perpendicular to the first direction and perpendicular to a thickness direction of the busbar component (300).

11. The battery module of claim 8, wherein, The battery module further comprises: A fourth battery cell (24) comprising a fourth electrode terminal (241), wherein a polarity of the fourth electrode terminal (241) is the same as that of the third electrode terminal (231); The busbar component (300) further comprises a fourth connecting portion (370) electrically connected with the fourth electrode terminal (241), and the fourth connecting portion (370) is electrically connected with the third connecting portion (350). The thickness of the second flow-through portion (360) is greater than the thicknesses of the first connecting portion (310) and the third connecting portion (350).

12. The battery module of claim 1, wherein, The first connecting portion (310) and the second connecting portion (320) are provided with a first fixing hole (380), and the battery module further comprises: A bracket (130), the busbar component (300) is arranged on one side of the bracket (130), and the bracket (130) comprises a plurality of fixing portions (131) extending at least partially between the first connecting portion (310) and the first battery cell (21) and between the second connecting portion (320) and the second battery cell (22); The fixing portion (131) is provided with a protruding structure (1311) arranged opposite to the first fixing hole (380) and penetrating through the first fixing hole (380).

13. The battery module of any one of claims 1-12, wherein, The thickness d3 of the first flow-through portion (330) satisfies 4mm≤d3≤10mm.

14. The battery module of any one of claims 1-12, wherein, The thickness d4 of the first connecting portion (310) and / or the second connecting portion (320) satisfies 1mm≤d4≤5mm.

15. A battery device characterized by comprising: The battery module of any one of claims 1 to 14. The battery module of any one of claims 1 to 14.

16. A busbar component, characterized by A first connecting portion (310), a second connecting portion (320) and a first flow-through portion (330), the first connecting portion (310) being electrically connected with a first electrode terminal (211) of a first battery cell (21), the second connecting portion (320) being electrically connected with a second electrode terminal (221) of a second battery cell (22), and the first flow-through portion (330) being located between the first connecting portion (310) and the second connecting portion (320) and electrically connecting the first connecting portion (310) and the second connecting portion (320); The thickness of the first flow-through portion (330) is greater than the thicknesses of the first connecting portion (310) and the second connecting portion (320). The battery device of claim 15, wherein the battery device is configured to provide electrical energy.

17. An electrical device, comprising: The battery device of claim 15, wherein the battery device is configured to store or provide electrical energy. The battery device of claim 15, wherein the battery device is configured to store or provide electrical energy.

18. An energy storage device, characterized by A power conversion device; And 19. An energy storage system characterized by, The energy storage device of claim 18, The power conversion device is configured to electrically connect a power generation device and the energy storage device. ​ ​ ​

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