Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a confluence assembly, a sampling assembly and a plurality of single batteries, the confluence assembly comprises a connecting piece, the connecting piece is used for electrically connecting two adjacent battery monomers in the plurality of battery monomers, and one end of the connecting piece along the first direction is provided with a clamping part; the clamping part comprises an insertion hole formed in the connecting piece, and the insertion hole extends in the second direction; the sampling assembly comprises a body extending in the first direction and a sampling part connected to one end, in the second direction, of the body, the sampling part is clamped in the insertion hole so that the clamping part and the sampling part can be connected in a clamped mode, and therefore electric connection between the connecting piece and the sampling part is achieved; wherein the first direction is perpendicular to the second direction. When the sampling assembly breaks down, the sampling part and the connecting piece can be disassembled by releasing the clamping connection, so that the sampling assembly and the confluence assembly can be disassembled, the whole battery device does not need to be scrapped, and the cost is saved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable social development, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] A battery management system (BMS) samples the battery voltage using a flexible printed circuit (FPC). However, in related technologies, if the flexible printed circuit fails, it is difficult to remove it from the battery, which can easily lead to the entire battery becoming unusable. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device and an electrical device that facilitates the disassembly of a flexible circuit board.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a busbar assembly, a sampling assembly, and a plurality of battery cells; the busbar assembly includes a connector for electrically connecting two adjacent battery cells among the plurality of battery cells, and one end of the connector along a first direction has a locking portion; the locking portion includes a socket disposed on the connector, the socket extending along a second direction; the sampling assembly includes a body extending along the first direction and a sampling portion connected to one end of the body along the second direction, the sampling portion engaging in the socket to engage and connect the locking portion and the sampling portion, thereby realizing the electrical connection between the connector and the sampling portion; wherein, the first direction and the second direction are arranged perpendicularly.

[0006] In this embodiment, the sampling unit can be engaged with the engaging portion of the connector, thereby achieving an electrical connection between the sampling unit and the connector. In the event of a malfunction in the sampling assembly, the engaging connection can be released to disassemble the sampling unit and the connector, thus enabling the disassembly of the sampling assembly and the busbar assembly without scrapping the entire battery device, saving costs. Furthermore, compared to the bonding wire connection method in related technologies, the engaging connection is less prone to breakage or separation under vehicle vibration conditions, resulting in higher reliability. Additionally, by providing the engaging portion at one end of the connector along the first direction, the edge of the connector can be used to connect the sampling unit and the connector, reserving space for the connection between the connector and the battery cell, which improves the reliability of the connection between the connector and the battery cell. By providing a socket extending along the second direction, the sampling unit and the engaging portion can be engaged, and the structure is simple and easy to implement. Moreover, the socket being located at one end of the connector along the first direction can correspondingly reduce the size of the connector along the second direction, providing space for the sampling assembly.

[0007] In some embodiments, the engaging portion is located on the side of the connector away from the battery cell, and the insertion hole is a through hole extending in a second direction.

[0008] In this embodiment, by placing the socket at the top of the connector, the bottom of the connector can fit more closely to the electrode terminals, which is beneficial to the stability of the connection. In addition, when the battery cell is placed in the housing, in order to prevent the housing cover from squeezing and damaging the sampling component, a certain space is usually reserved between the cover and the FPC. That is, the top of the connector can have a certain space, and the socket can be set in this space, further improving the space utilization rate.

[0009] In some embodiments, the engaging portion is formed by curling one end of the connector along a first direction.

[0010] By curling the connector to form the insertion hole, the processing of the engaging part can be simplified, reducing costs. Simultaneously, it also enables the engaging connection between the sampling part and the engaging part.

[0011] In some embodiments, the sampling section includes an elastic segment, which includes a first sub-segment and a second sub-segment disposed opposite to each other. The first sub-segment and the second sub-segment can approach each other under the action of an external force so that the elastic segment engages in the engaging section.

[0012] In this embodiment, by setting an elastic segment, which includes a first sub-segment and a second sub-segment, the first and second sub-segments can approach each other under the action of external force, thereby locking the engaging part. This achieves the engagement of the engaging part and the sampling part with high reliability. In addition, this structure is easy to manufacture, which can reduce costs.

[0013] In some embodiments, the first sub-segment has a first arcuate surface that is opposite to the second sub-segment, the second sub-segment has a second arcuate surface that is opposite to the first sub-segment, and the maximum distance between the first arcuate surface and the second arcuate surface first increases and then decreases along a second direction.

[0014] In this embodiment, the maximum distance between the first arc-shaped surface and the second arc-shaped surface first increases and then decreases along the second direction, which facilitates the insertion of the elastic segment into the engaging part. At the same time, it also allows the elastic segment to lock the engaging part tightly, improving the reliability of the connection.

[0015] In some embodiments, the maximum distance L between the first arcuate surface and the second arcuate surface satisfies: 0.8mm ≤ L ≤ 1.5mm.

[0016] By setting the maximum distance to be no less than 0.8mm, the engagement strength between the engaging part and the elastic section can be improved, thus enhancing the reliability of the connection. At the same time, by setting the maximum distance to be no more than 1.5mm, the space occupied can be reduced accordingly, which is beneficial to improving energy density.

[0017] In some embodiments, the elastic segment is made of copper, and the contact resistance R between the elastic segment and the engaging portion satisfies: R < 0.5Ω.

[0018] In this embodiment, by incorporating an elastic segment made of copper, the material is both conductive and elastic, allowing it to engage with the locking part. Furthermore, copper has low contact resistance and good conductivity. By setting the contact resistance between the elastic segment and the locking part to less than 0.5Ω, the impact of contact resistance on voltage sampling can be reduced, improving sampling accuracy.

[0019] In some embodiments, the sampling section further includes a limiting section connected between the elastic segment and the body, one end of the first sub-segment and one end of the second sub-segment are both connected to the limiting section, and the limiting section is used to abut against one end of the engaging portion along the second direction.

[0020] In this embodiment, by setting a limiting segment, the insertion depth of the elastic segment and the engaging part can be limited, avoiding installation errors caused by excessive insertion depth and improving assembly accuracy.

[0021] In some embodiments, the limiting segment includes a third sub-segment connected to the body and a fourth sub-segment connected between the third sub-segment and the elastic segment. The fourth sub-segment is used to abut against one end of the engaging portion along the second direction. The first dimension of the fourth sub-segment along the first direction increases from the end near the elastic segment to the end near the third sub-segment, and the first dimension D1 of the fourth sub-segment near the end of the third segment and the second dimension D2 of the third segment along the first direction satisfy: D2 < D1.

[0022] In this embodiment, by setting a third sub-segment and a fourth sub-segment in the limiting segment, the fourth sub-segment can play a locking and limiting role, improving the accuracy of the locking connection. The second dimension D2 of the third sub-segment can be smaller than the first dimension D1 of the fourth sub-segment near the end of the third sub-segment, so that the limiting segment can reduce its size while playing a limiting role, thereby reducing the space occupied and material costs.

[0023] In some embodiments, the limiting segment is provided with a positioning part for being identified and positioned by a visual recognition module.

[0024] In this embodiment, by setting a positioning part, it can be scanned and image-recognized and positioned by a visual recognition module, thereby determining the position of the sampling part. This facilitates the use of automated equipment such as robotic arms to achieve automatic assembly of the sampling part and the engaging part, thus improving assembly efficiency.

[0025] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0028] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0029] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0030] Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0031] Figure 4 This is an exploded view of the internal structure of a battery device according to some embodiments of this application;

[0032] Figure 5 for Figure 4 A schematic diagram of the engagement connection between the sampling section and the engagement section;

[0033] Figure 6for Figure 4 Schematic diagram of the middle sampling section;

[0034] Figure 7 for Figure 6 Sectional view at point AA.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1000 vehicles;

[0037] Battery unit 100, controller 200, motor 300;

[0038] Battery cell assembly 10, battery cell 11, end cap 12, housing 13, electrode assembly 14, electrode terminal 15;

[0039] Busbar assembly 400, connector 410, engaging part 420, socket 421;

[0040] Sampling component 500, body 510, sampling part 520, elastic segment 530, first sub-segment 531, second sub-segment 532, first arc surface 533, second arc surface 534, limiting segment 540, third sub-segment 541, fourth sub-segment 542, positioning part 550.

[0041] Box 20, Part 1 21, Part 2 22. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "embodiment" means that a particular 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments 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 three cases: a exists alone, a and b exist simultaneously, and b exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "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).

[0048] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] The following is an explanation of the proper nouns that appear in the embodiments of this application:

[0051] FPC (Flexible Printed Circuit) is a type of printed circuit board made with polyimide or polyester film as the substrate, characterized by high reliability and flexibility. FPC can be freely bent, rolled, and folded, and can be arranged arbitrarily according to spatial layout requirements. It can also move and stretch freely in three-dimensional space, thereby achieving the integration of component assembly and wire connection.

[0052] A fuse, also known as a current fuse, is defined as a fuse-link in the IEC 127 standard (the international standard for miniature fuses). Its primary function is overload protection. When a fuse is correctly installed in a circuit, it will melt and break the current when the current abnormally rises to a certain level or temperature, thus protecting the circuit's safe operation.

[0053] A Battery Management System (BMS) is often referred to as a battery caretaker or battery manager. Its main purpose is to intelligently manage and maintain each battery cell, monitor the battery's status, and prevent overcharging and over-discharging, thereby extending the battery's lifespan.

[0054] The CSC (Cell Sensing Controller) sampling board is a core hardware component in power system protection devices. It is mainly used to collect key analog signals such as voltage and current in the circuit in real time and convert them into digital signals for analysis and processing by the protection device.

[0055] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0056] In related technologies, a battery comprises multiple individual cells connected by battery panels. A circuit board (FPC) is laser-welded onto the panels. The CSC sampling board in the battery management system (BMS) can connect to the FPC to sample the battery voltage (it's understood that in some batteries, the FPC and BMS can also be connected via a low-voltage wiring harness). Additionally, a thin, serpentine copper wire is etched into the FPC's traces. This copper wire acts as a fuse (FUSE), which melts in the event of a short circuit or surge current to prevent thermal runaway of the battery.

[0057] However, because the FPC is welded to the battery, if the FUSE melts or the FUSE etching fails, causing the FPC to malfunction, the FPC cannot be removed from the battery, rendering the entire battery unusable.

[0058] Another related technology involves a bonding wire connection method, where a wire-like bonding wire is welded between the FPC and the electrode plate, and the FPC is disassembled by breaking the bonding wire. However, the bonding wire connection has a significant drawback: because the bonding wire is a thin metal wire, its mechanical impact resistance is weak, and it is prone to breakage under vehicle vibration conditions, leading to sampling failure.

[0059] To address at least one of the aforementioned problems, this application provides a battery device and an electrical device. The battery device includes a busbar assembly, a sampling assembly, and multiple battery cells. The busbar assembly includes a connector for electrically connecting two adjacent battery cells among the multiple battery cells, and one end of the connector along a first direction has a locking portion. The locking portion includes a socket provided on the connector, which extends along a second direction. The sampling assembly includes a body extending along the first direction and a sampling portion connected to one end of the body along the second direction. The sampling portion engages in the socket to engage the locking portion with the sampling portion, thereby achieving an electrical connection between the connector and the sampling portion. The first direction is perpendicular to the second direction.

[0060] In this embodiment, by providing a socket extending along the second direction, the sampling unit and the engaging unit can be connected in a simple and easy-to-implement manner. The sampling unit can be engaged with the engaging part of the connector, thereby achieving an electrical connection between the sampling unit and the connector. In the event of a malfunction in the sampling assembly, the engaging connection can be released to disassemble the sampling unit and the connector, thus enabling the disassembly of the sampling assembly and the bus assembly without scrapping the entire battery device, saving costs. Furthermore, compared to the bonding wire connection method in related technologies, the engaging connection is less prone to breakage or separation under vehicle vibration conditions, resulting in higher reliability. Additionally, by providing an engaging part at one end of the connector along the first direction, the edge of the connector can be used to connect the sampling unit and the connector, reserving space for the connection between the connector and the battery cell, which improves the reliability of the connection between the connector and the battery cell. The socket being located at one end of the connector along the first direction also reduces the size of the connector along the second direction, providing space for the sampling assembly.

[0061] The technical solutions described in the embodiments of this application are applicable to battery devices, electrical devices using battery devices, and energy storage devices.

[0062] The energy storage device utilizing battery devices as a power source in this application embodiment includes one or more battery clusters to enhance the voltage and capacity of the energy storage device. A battery cluster 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.

[0063] 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 devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices. As an example, the energy storage device is an energy storage container or an energy storage cabinet.

[0064] In this application embodiment, the power-consuming device using a battery as a power source can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] It should be understood that the technical solutions described in the embodiments of this application are not limited to the energy storage devices and electrical devices described above, but can also be applied to all battery devices including housings and electrical devices using battery devices. However, for the sake of brevity, the following embodiments will be described using a vehicle as an example of an electrical device.

[0066] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

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

[0068] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this application.

[0069] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0070] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0071] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0072] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 20 and one or more individual battery cells 10, with the individual battery cells 10 housed within the housing 20. The housing 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple cuboids, cylinders, or spheres. The material of the housing 20 can be an alloy such as aluminum alloy or iron alloy, a polymer such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0073] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0074] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0075] As an example, the housing 20 may include a first part 21 and a second part 22. The first part 21 and the second part 22 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11. The first part 21 may be a top cover or a bottom plate.

[0076] As an example, the housing 20 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 the interior of the housing 20 forms an enclosed space to house the battery cell assembly 10.

[0077] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0078] The battery cell 11 provided in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0079] The battery cell 11 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.

[0080] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. The battery cell 11 refers to the smallest unit that makes up the battery. For example... Figure 3 The battery cell 11 includes an end cap 12, a housing 13, an electrode assembly 14, and other functional components.

[0081] End cap 12 refers to a component that covers the opening of housing 13 to isolate the internal environment of battery cell 11 from the external environment. The shape of end cap 12 can be adapted to the shape of housing 13 to fit it. In some embodiments, end cap 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 12 is less prone to deformation under pressure and impact, allowing battery cell 11 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 15 can be provided on end cap 12. Electrode terminals 15 can be used for electrical connection with electrode assembly 14 for outputting or inputting electrical energy to battery cell 11. In some embodiments, end cap 12 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 11 reaches a threshold. The material of end cap 12 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 12. The insulating element can be used to isolate the electrical connection components within the housing 13 from the end cap 12 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0082] The housing 13 is a component used to cooperate with the end cap 12 to form the internal environment of the battery cell 11. This internal environment can accommodate the electrode assembly 14, electrolyte, and other components. The housing 13 and the end cap 12 can be independent components. An opening can be provided on the housing 13, and the end cap 12 closes the opening to form the internal environment of the battery cell 11. Alternatively, the end cap 12 and the housing 13 can be integrated. Specifically, the end cap 12 and the housing 13 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 13, the end cap 12 closes the housing 13. The housing 13 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 13 can be determined according to the specific shape and size of the electrode assembly 14. The housing 13 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0083] Electrode assembly 14 is the component in the battery cell 11 where the electrochemical reaction takes place. The housing 13 may contain one or more electrode assemblies 14. Electrode assembly 14 is mainly formed by winding and forming positive and negative electrode plates, and a separator is typically provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly.

[0084] Figure 4 This is an exploded view of the internal structure of a battery device according to some embodiments of this application; Figure 5 for Figure 4 A schematic diagram showing the engagement connection between the sampling section and the engaging section. Please refer to... Figure 4 and Figure 5 This application provides a battery device 100, including: a busbar assembly 400, a sampling assembly 500, and a plurality of battery cells 11; the busbar assembly 400 includes a connector 410 for electrically connecting two adjacent battery cells 11 among the plurality of battery cells 11, and the connector 410 has a locking portion 420 at one end along a first direction X; the locking portion 420 may include a socket 421 provided on the connector 410, the socket 421 extending along a second direction Y; the sampling assembly 500 includes a body 510 extending along the first direction X and a sampling portion 520 connected to one end of the body 510 along the second direction Y, the sampling portion 520 locking into the socket 421 to lock the locking portion 420 and the sampling portion 520 together, thereby realizing the electrical connection between the connector 410 and the sampling portion 520; wherein, the first direction X and the second direction Y are perpendicular to each other. In this embodiment, the housing 20 of the battery device 100 can accommodate multiple battery cells 11, which can be arranged in an array, and the electrode terminals 15 can be disposed on the top of the battery cells 11. Figure 4 A group of battery cells 11 arranged along a first direction X is shown. The second direction Y can be perpendicular to the first direction, and the third direction Z can be perpendicular to both the first direction X and the second direction Y.

[0085] In this embodiment, the busbar assembly 400 can be disposed on top of these battery cells 11, thereby electrically connecting the electrode terminals 15 of the battery cells in a series-parallel relationship to form the required total voltage and capacity output circuit. Specifically, the busbar assembly 400 may include one or more connectors 410, which can be sheet-like metal structures, for example, they can be welded to the electrode terminals 15 of two adjacent battery cells, thereby connecting multiple battery cells 11. The busbar assembly 400 can be used to transmit current, realizing the series, parallel, or mixed connection of battery cells 11, etc.

[0086] The sampling component 500 can be connected to the busbar component 400 to collect temperature and / or voltage signals of individual battery cells, etc. This is understandable, such as... Figure 4 For a group of battery cells 11 arranged along the first direction X, two rows of connectors 410 arranged along the first direction X can be provided on them. The sampling component 500 can be set between the two rows of connectors 410, so as to make reasonable use of space and improve the space utilization rate of the battery device.

[0087] The sampling component 500 can be connected to the BMS, thereby facilitating the BMS to acquire the temperature and voltage signals of the battery device in a timely manner.

[0088] The sampling assembly 500 may include a body 510 extending along a first direction X, and a sampling section 520 connected to one end of the body 510. The body 510 may be a circuit structure such as a flexible circuit board, which may be disposed along the first direction X. The sampling section 520 may be disposed at one end of the body 510 along a second direction Y. The number of sampling sections 520 may be one or more. For example, multiple sampling sections 520 may be disposed on both sides of the body 510 along the second direction Y. The specific number of sampling sections 520 may be set according to the number of connectors or the number of sampling points to be sampled.

[0089] In this embodiment, the sampling part 520 can be engaged with the engaging part 420 to achieve an engaging connection between the sampling part 520 and the connector 410. It is understood that both the sampling part 520 and the engaging part 420 can be made of conductive materials, such as copper, aluminum, or alloys. The engagement between the sampling part 520 and the engaging part 420 also enables an electrical connection between them, facilitating sampling by the sampling component 500 through the sampling part 520, such as voltage sampling.

[0090] In this embodiment, the engaging portion 420 may include an insertion hole 421 disposed at one end of the connector. The insertion hole 421 may extend along the second direction Y. It is understood that the insertion hole 421 may be a through hole or a blind hole, and the specific configuration can be determined according to the actual situation. It is understood that, in order to facilitate the demonstration of the engagement between the sampling portion 520 and the engaging portion, Figure 4 and Figure 5 The jack 421 is shown in perspective.

[0091] The socket 421 can be formed inside the connector 410. For example, the socket 421 can be formed by drilling a hole from the side of the connector 410, or other structures can be provided on the top of the connector 410 and the socket 421 can be formed on the structure.

[0092] The sampling part 520 can protrude from the body 510 along the second direction Y. The sampling part 520 can be inserted into the socket 421 and abut against the wall of the socket 421, thereby realizing the snap-fit ​​connection between the sampling part 520 and the engaging part 420.

[0093] It is understood that, in this embodiment, the sampling part 520 can be an elastic structure, which can contract inward under the pressure of the wall of the socket 421, thereby extending into the socket. At the same time, the elastic force generated by the contraction can lock the sampling part 520 into the wall of the socket 421. It is understood that the shape of the sampling part 520 can be various, such as a conical structure or a wedge structure, etc.

[0094] In addition, in this embodiment, the engaging part 420 can be disposed at one end of the connector 410 along the first direction X. It can be understood that the connector 410 can be welded to the electrode terminal 15. By disposing the engaging part 420 at one end of its first direction, sufficient space can be reserved for the connector 410 to facilitate welding to the electrode terminal 15. At the same time, it can also save space between two adjacent rows of connectors 410, providing space for arranging the sampling component.

[0095] In some embodiments, a fuse can also be formed on the body 510 by etching. This fuse can be a narrow-line serpentine copper wire, which can provide overcurrent protection. For example, in the event of a short circuit or surge current in the battery device, the fuse will melt, thereby preventing thermal runaway of the battery device.

[0096] In addition, in this embodiment, the connector can be directly connected to the electrode terminals of two individual battery cells; in other embodiments, it can also be connected between the electrode terminals of a battery module.

[0097] In this embodiment, by providing a socket extending along the second direction, the sampling unit and the engaging unit can be engaged and connected, and the structure is simple and easy to implement. The sampling unit can be engaged and connected to the engaging part of the connector, thereby realizing the electrical connection between the sampling unit and the connector. Since the engaging connection is a detachable connection, when the sampling component malfunctions, for example, when the fuse blows or the fuse etching is faulty, the sampling unit can be separated from the engaging part, thereby separating the sampling component from the bus component, and then removing the sampling component from the battery device. This allows for convenient replacement of the sampling component without scrapping the entire battery device, saving costs.

[0098] Secondly, compared with the bonding wire connection method in related technologies, the snap-fit ​​connection method provided in this embodiment has a higher strength at the snap-fit ​​connection position than the bonding wire. Therefore, it is not easy to break like the bonding wire under vehicle vibration conditions, and the structure has high reliability, which is beneficial to the stability of voltage sampling.

[0099] Furthermore, by providing a locking portion at one end of the connector along the first direction, the edge portion of the connector can be used to connect the sampling unit to the connector, reserving space for the connection between the connector and the battery cell, which helps improve the reliability of the connection between the connector and the battery cell. At the same time, it can also save space between two adjacent rows of connectors, providing space for arranging the sampling components.

[0100] In addition, the fact that the jack is located at one end of the connector along the first direction can reduce the size of the connector along the second direction, which is beneficial for providing space for the sampling component.

[0101] Continue to refer to Figure 4 and Figure 5According to some embodiments of this application, the engaging portion 420 is located on the side of the connector 410 away from the battery cell 11, and the insertion hole 421 is a through hole extending along the second direction 421.

[0102] In this embodiment, the connector 410 can be disposed on the top of the battery cell 11 along the third direction Z, and the engaging part 420 can also be located on the top of one end of the connector 410 along the first direction X.

[0103] For example, the connector 410 may include two parts connected sequentially along a first direction, wherein the height of the first part along the third direction Z may be greater than the height of the second part, the second part may be welded to the electrode terminal to achieve a current-carrying function, and the first part may be provided with a socket 421 to engage with the engaging part.

[0104] In addition, the insertion hole 421 can be a through hole extending along the second direction 421, that is, the insertion hole 421 can pass through both ends of the connector along the second direction 421, which facilitates processing.

[0105] In this embodiment, by placing the socket at the top of the connector, the bottom of the connector can fit more closely to the electrode terminals, which is beneficial to the stability of the connection. In addition, when the battery cell is placed in the housing, in order to prevent the housing cover from squeezing and damaging the sampling component, a certain space is usually reserved between the cover and the FPC. That is, the top of the connector can have a certain space, and the socket can be set in this space, further improving the space utilization rate.

[0106] It is understandable that connectors are usually made of high-strength metal structures, while sampling components are usually made of FPC. Therefore, the compressive strength of connectors is higher than that of sampling components. Even if the gap between the connector and the cover is small, it will not damage the connector.

[0107] According to some embodiments of this application, the engaging portion 420 is formed by curling one end of the connector 410 along the first direction X.

[0108] In this embodiment, the connector 410 can be a sheet-like structure, and one section of it along the first direction can be folded and rolled upwards to form a socket 421.

[0109] It is understandable that the curling angle can be a full circle, so that the socket 421 can be a complete hole, or the curling angle can be less than a full circle, so that the socket 421 can be a hole with a central angle of less than 360 degrees. The specific setting can be made according to the actual situation.

[0110] In addition, the cross-sectional shape of the socket 421 can also be various. For example, the cross-section of the socket 421 can be circular, or the cross-section of the socket 421 can also be angular, elliptical, triangular, etc.

[0111] In this embodiment, during the manufacturing process, a sheet-like connector can be formed first, and then one end of it can be wound to form a socket 421. The connector is then welded to the electrode terminal, and finally the sampling part of the sampling component can be snapped into the socket 421.

[0112] By curling the connector to form the insertion hole, the processing of the engaging part can be simplified, reducing costs. Simultaneously, it also enables the engaging connection between the sampling part and the engaging part.

[0113] Figure 6 for Figure 4 Schematic diagram of the middle sampling section; Figure 7 for Figure 6 Sectional view at point AA. Please refer to... Figures 5 to 7 According to some embodiments of this application, the sampling section 520 includes an elastic segment 530, which includes a first sub-segment 531 and a second sub-segment 532 disposed opposite to each other. The first sub-segment 531 and the second sub-segment 532 can approach each other under the action of an external force so that the elastic segment 530 is engaged in the engaging section 420.

[0114] In this embodiment, the sampling section 520 may include an elastic segment 530, which may be the part of the sampling section 520 mainly used to engage with the engaging section 420.

[0115] The elastic segment 530 can be elastic, capable of elastic deformation under external force, and able to return to its original shape after the external force is removed. It can be understood that the elastic segment 530 can be made of a conductive elastic material, or it can be made of a metallic material with a certain degree of deformability.

[0116] The elastic segment 530 may include a first sub-segment 531 and a second sub-segment 532. The first sub-segment 531 and the second sub-segment 532 may be arranged opposite each other in a direction perpendicular to the second direction, for example, they may be arranged opposite each other in a first direction, or they may be arranged opposite each other in a third direction. Figure 6 In the example of the first sub-segment 531 and the second sub-segment 532 being set relative to each other along a third direction, the relative setting can be understood as the projections of the two in the XY plane having partial overlap.

[0117] There may be a gap between the first segment 531 and the second segment 532. When subjected to external pressure, the first segment 531 and the second segment 532 can move closer to each other, thereby reducing the outer contour size of the elastic segment 530 so that it can be inserted into the engaging part (e.g., the socket 421 or the slot). In addition, the reaction force generated after the elastic segment 530 is squeezed can cause the elastic segment 530 to abut against the engaging part (e.g., the inner wall of the socket or the slot), thereby allowing the elastic segment 530 to lock into the engaging part and achieve relative fixation between the two.

[0118] The ends of the first sub-segment 531 and the second sub-segment 532 along the second direction can be directly or indirectly connected to the body, so that the elastic segment 530 can protrude from the body to facilitate connection with the engaging part.

[0119] It is understood that in other embodiments, the sampling unit 520 may include other sub-segments in addition to the first sub-segment 531 and the second sub-segment 532. For example, the sampling unit 520 may include 3, 4, 5, 6 or more sub-segments. These sub-segments may be spaced apart along the circumferential direction and may have gaps between them, so that they may also move closer together under the action of external force.

[0120] Furthermore, the outer contour shape of the elastic segment 530 can have various forms. For example, the first and second sub-segments can each have a sloping surface, with the two sloping surfaces inclined relative to each other, so that the outer contour of the elastic segment can be approximately a gradually expanding wedge-shaped structure. Alternatively, the first and second sub-segments can each have a partial conical surface, so that the elastic segment 530 can be closed to roughly form a complete conical surface.

[0121] In this embodiment, by setting an elastic segment, which includes a first sub-segment and a second sub-segment, the first and second sub-segments can approach each other under the action of external force, thereby locking the engaging part. This achieves the engagement of the engaging part and the sampling part with high reliability. In addition, this structure is easy to manufacture, which can reduce costs.

[0122] Please refer to Figure 7 According to some embodiments of this application, the first sub-segment 531 has a first arcuate surface 533 facing away from the second sub-segment 532, and the second sub-segment 532 has a second arcuate surface 534 facing away from the first sub-segment 531. The maximum distance between the first arcuate surface 533 and the second arcuate surface 534 first increases and then decreases along the second direction Y.

[0123] The first arc-shaped surface 533 of the first sub-segment 531, which is away from the second sub-segment 532, can be the outer surface of the first sub-segment 531. Its shape can be arc-shaped, for example, it can be composed of a part of a sphere, a cone, or a frustum, etc.

[0124] Similarly, the second arc-shaped surface 534 of the second sub-segment 532, which is away from the first sub-segment 531, can be the outer surface of the second sub-segment 532. Its shape can be arc-shaped, for example, it can be composed of a part of a sphere, a cone, or a frustum, etc.

[0125] In one embodiment, the first sub-segment 531 and the second sub-segment 532 can be arranged symmetrically about a symmetrical plane. It is understood that... Figure 6The surface of the first segment 531 shown can be a first arc-shaped surface. The plane of symmetry between the first segment 531 and the second segment 532 can be parallel to the XY plane. Along the first direction, the distance between the first arc-shaped surface and the plane of symmetry can first increase and then decrease. The position shown in section AA is the location with the maximum distance.

[0126] Similarly, the distance between the second arc-shaped surface 534 and the plane of symmetry can also be calculated along... Figure 6 The vertical direction first increases and then decreases. Figure 7 The cross-sectional view at section AA shown in the figure indicates that the maximum distance L between the first arcuate surface 533 and the second arcuate surface 534 can be... Figure 7 The distance between the upper contour of the first arcuate surface 533 and the lower contour of the second arcuate surface 534 shown in the figure.

[0127] It is understandable that the maximum distance L can first increase and then decrease along the second direction Y, that is, the outer contour dimension of the elastic segment 530 can first increase and then decrease.

[0128] Specifically, the outer contour dimension of the end of the elastic segment 530 opposite to the body 510 can be smaller, thereby serving a guiding function and facilitating the insertion of the elastic segment 530 into the socket 421. Conversely, the outer contour dimension of the elastic segment 530 at its midpoint along the second direction can be larger, allowing it to abut against the wall of the socket and improving the firmness of the engagement. The outer contour dimension of the elastic segment 530 near the body 510 can also be smaller. Since the body 510 can be roughly sheet-like or plate-like, reducing the outer contour dimension of the elastic segment near the body 510 facilitates connection with the body 510, resulting in a smoother transition and reducing stress concentration.

[0129] In this embodiment, the maximum distance between the first arc-shaped surface and the second arc-shaped surface first increases and then decreases along the second direction, which facilitates the insertion of the elastic segment into the engaging part. At the same time, it also allows the elastic segment to lock the engaging part tightly, improving the reliability of the connection.

[0130] According to some embodiments of this application, the maximum distance L between the first arcuate surface 533 and the second arcuate surface 534 satisfies: 0.8mm≤L≤1.5mm.

[0131] It is understandable that the maximum distance L between the first arc-shaped surface 533 and the second arc-shaped surface 534 can have multiple values, such as 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm. Alternatively, the maximum distance L can also have multiple ranges, such as 0.8mm≤L≤1.4mm, 0.9mm≤L≤1.5mm, or 0.9mm≤L≤1.4mm.

[0132] By setting the maximum distance to be no less than 0.8mm, the engagement strength between the engaging part and the elastic section can be improved, thus enhancing the reliability of the connection. At the same time, by setting the maximum distance to be no more than 1.5mm, the space occupied can be reduced accordingly, which is beneficial to improving energy density.

[0133] According to some embodiments of this application, the elastic segment 530 is made of copper, and the contact resistance R between the elastic segment 530 and the engaging portion 420 satisfies: R < 0.5Ω.

[0134] In this embodiment, the elastic segment 530 can be made of copper, which has a certain elastic deformation capacity to achieve a snap-fit ​​connection with the engaging part. Furthermore, copper has good electrical conductivity, which helps reduce costs.

[0135] Contact resistance refers to the additional resistance generated at the contact interface when two conductors are in contact. In this embodiment, the contact resistance R can be the additional resistance at the contact interface between the engaging part 420 and the elastic segment 530, that is, the additional resistance at the contact interface between the engaging part and the sampling part.

[0136] In this embodiment, the contact resistance R can be less than 0.5Ω, for example, it can be 2mΩ (milliohms), 4mΩ, 6mΩ, 8mΩ, 0.1Ω, 0.2Ω, 0.3Ω, or 0.4Ω, etc. In other embodiments, the contact resistance R can also satisfy R < 0.4Ω, R < 0.1Ω, or R < 0.8mΩ, etc.

[0137] In another embodiment, multi-point pressure contact can be formed between the elastic segment 530 and the engaging portion 420, and the contact force F can satisfy F≥3N. A contact force greater than 3N allows for higher pushing and retaining forces between the elastic segment and the engaging segment, ensuring a tight connection and high reliability. Of course, in other embodiments, the contact force F can also satisfy F≥4N, or F≥5N, etc.

[0138] In this embodiment, by incorporating an elastic segment made of copper, the material is both conductive and elastic, allowing it to engage with the locking part. Furthermore, copper has low contact resistance and good conductivity. By setting the contact resistance between the elastic segment and the locking part to less than 0.5Ω, the impact of contact resistance on voltage sampling can be reduced, improving sampling accuracy.

[0139] Please refer to Figure 5 , Figure 6 and Figure 7 According to some embodiments of this application, the sampling unit 520 further includes a limiting section 540 connected between the elastic section 530 and the body 510. One end of the first sub-section 531 and one end of the second sub-section 532 are both connected to the limiting section 540, and the limiting section 540 is used to abut against one end of the engaging part 420 along the second direction Y.

[0140] In this embodiment, a limiting segment 540 may also be provided between the elastic segment 530 and the body 510. The limiting segment 540 can connect the elastic segment 530 and the body 510, and at the same time, it can also play a limiting role.

[0141] Specifically, Figure 7 The right ends of the first sub-segment 531 and the second sub-segment 532 can both be connected to the limiting segment 540. For example, the elastic segment and the limiting segment can be machined in one piece, or the elastic segment and the limiting segment can be machined separately and then connected by common connection methods such as welding and riveting.

[0142] It is understandable that the dimension of the end of the limiting segment 540 near the elastic segment 530 along the first direction X can be greater than the dimension of the engaging portion along the first direction, so that the elastic segment will not penetrate deep into the socket.

[0143] The end of the limiting segment 540 near the elastic segment 530 can protrude from the end face of the engaging portion, thus preventing it from being pushed into the engaging portion. For example... Figure 5 The elastic segment 530 can be inserted into the socket 421 from right to left. After it is fully engaged in the socket 421, the limiting segment 540 can abut against the right end face of the socket 421, thereby limiting the insertion depth of the elastic segment to be too deep.

[0144] The shape of the limiting segment can be varied, such as a square sheet structure or a spherical sheet structure, etc., and can be set according to the actual situation.

[0145] In this embodiment, by setting a limiting segment, the insertion depth of the elastic segment and the engaging part can be limited, avoiding installation errors caused by excessive insertion depth and improving assembly accuracy.

[0146] Please refer to Figure 6 According to some embodiments of this application, the limiting segment 540 includes a third sub-segment 541 connected to the body 510 and a fourth sub-segment 542 connected between the third sub-segment 541 and the elastic segment 530. The fourth sub-segment 542 is used to abut against one end of the engaging portion 420 along the second direction Y. The first dimension of the fourth sub-segment along the first direction X increases from the end near the elastic segment 530 to the end near the third sub-segment 541, and the first dimension D1 of the fourth sub-segment 542 near the end of the third sub-segment 541 satisfies the condition that D2 < D1.

[0147] In this embodiment, the limiting segment 540 may coincide with or be parallel to the plane on which the body 510 is located. The limiting segment 540 may include two parts, a third sub-segment 541 and a fourth sub-segment 542. The third sub-segment may be connected between the elastic segment 530 and the third sub-segment 541, and the third sub-segment 541 may be connected between the fourth sub-segment 542 and the body 510. It can be understood that along the second direction Y, the elastic segment 530, the fourth sub-segment 542, the third sub-segment 541, and the body 510 may be connected sequentially.

[0148] The fourth segment 542 can act as a limiter when the elastic segment 530 engages with the socket, and it can abut against one end of the engaging portion 420 along the second direction. The fourth segment can be a sheet-like structure perpendicular to the third direction, and the dimension of the fourth segment 542 along the first direction can be a first dimension. Figure 6 In the middle, the first dimension can gradually increase from the elastic segment 530 towards the direction of the third sub-segment, so that the fourth sub-segment can be a gradually expanding structure that gradually increases from left to right.

[0149] It is understandable that the shape of the fourth sub-segment can be varied, for example... Figure 6 The shape can be an arc, or it can be a triangle, trapezoid, etc.

[0150] When the elastic segment 530 is engaged in the socket 421, the narrow end of the fourth sub-segment 542 ( Figure 6 The left end can be used to abut against the end face of the engaging part 420, thereby playing a limiting role.

[0151] The third segment 541 can be used to connect with the body 510, and it can also be a sheet-like structure perpendicular to the third direction. The dimension of the third segment 541 along the first direction can be the second dimension D2. The first dimension of the end of the fourth segment 542 closest to the third segment 541 (the right end) can be represented by D1, where D2 < D1.

[0152] It is understandable that the third sub-segment 541 can be a structure where the second dimension D2 is the same everywhere. Alternatively, the second dimension of the third sub-segment 541 can also be different at different positions along the second direction Y. In this case, the first dimension D1 of the fourth sub-segment 542 near the end of the third sub-segment 541 can be greater than the second dimension D2 at all positions of the third sub-segment 541.

[0153] In some embodiments, the third segment 541 and the fourth segment 542 can be integrally manufactured from the same material, such as copper or nickel. Additionally, the elastic segment 530, the third segment 541, and the fourth segment 542 can also be integrally manufactured from the same material.

[0154] In this embodiment, by setting a third sub-segment and a fourth sub-segment in the limiting segment, the fourth sub-segment can play a locking and limiting role, improving the accuracy of the locking connection. The second dimension D2 of the third sub-segment can be smaller than the first dimension D1 of the fourth sub-segment near the end of the third sub-segment, so that the limiting segment can reduce its size while playing a limiting role, thereby reducing the space occupied and material costs.

[0155] According to some embodiments of this application, the limiting segment 540 is provided with a positioning part 550 for being identified and positioned by a visual recognition module.

[0156] The positioning part 550 can be a structure that can be scanned and recognized by a visual recognition module such as a camera. For example, it can be a concave dot, a convex dot, or a mark with a color that distinguishes it from other areas. The shape of the positioning part 550 can also be various, such as a circle, a triangle, a square, etc.

[0157] In this embodiment, the positioning part can be set on the third sub-segment 541. The positioning part is closer to the body 510. During the engagement process, the positioning part 550 is not easily blocked, which can improve the recognition accuracy.

[0158] Alternatively, the positioning unit 550 can also be located in the fourth sub-segment 542, integrating the functions of identification positioning and locking limit on the fourth sub-segment.

[0159] It is understandable that during the assembly process, for example, when the robotic arm grips the sampling component and inserts the sampling part into the engaging part, the robotic arm's vision recognition module can scan and determine the position of the positioning part 550. At the same time, it can also scan and determine the position of the edge of the engaging part near the body 510. Thus, by measuring the distance between the positioning part 550 and the edge of the engaging part, the insertion depth of the sampling part can be determined, and the insertion can stop when the depth reaches a preset value. This allows the sampling part to engage in place more securely. Furthermore, by combining the vision recognition module with the robotic arm, automatic engagement can be achieved, improving assembly efficiency.

[0160] In some embodiments, the visual recognition module can be a 20-megapixel industrial camera, and the image recognition can adopt the Halcon (Hybrid Algorithm Language Conversion) image processing algorithm, so that the positioning accuracy of the position recognition can reach ±0.05mm, which is beneficial to the accuracy of the locking.

[0161] In this embodiment, by setting a positioning part, it can be scanned and image-recognized and positioned by a visual recognition module, thereby determining the position of the sampling part. This facilitates the use of automated equipment such as robotic arms to achieve automatic assembly of the sampling part and the engaging part, thus improving assembly efficiency.

[0162] This application provides an electrical device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to provide electrical energy.

[0163] Electrical devices include vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc.

[0164] It is understood that the electrical device provided in this application, by using any of the aforementioned battery devices 100, has all the beneficial effects of the aforementioned battery devices 100, which will not be elaborated here.

[0165] This application provides an energy storage device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to store electrical energy.

[0166] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, and so on.

[0167] It is understood that the energy storage device provided in this application, by using any of the aforementioned battery devices 100, has all the beneficial effects of the aforementioned battery devices 100, which will not be elaborated here.

[0168] Please refer to Figures 4 to 7 This embodiment provides a battery device, including a busbar assembly 400, a sampling assembly 500, and a plurality of battery cells 11. The busbar assembly 400 includes a connector 410 for electrically connecting two adjacent battery cells 11 among the plurality of battery cells 11, and the connector 410 has a locking portion 420 at one end along a first direction X. The locking portion 420 may include a socket 421 provided on the connector 410, and the socket 421 extends along a second direction Y. The sampling assembly 500 includes a body 510 extending along the first direction X and a sampling portion 520 connected to one end of the body 510 along the second direction Y. The sampling portion 520 is locked in the socket 421 to lock the locking portion 420 and the sampling portion 520 together, thereby realizing the electrical connection between the connector 410 and the sampling portion 520. The first direction X and the second direction Y are perpendicular to each other.

[0169] It is understandable that during battery voltage sampling, the BMS needs to monitor the voltage of each battery cell in real time. The sampling part 520 of the sampling component 500 can be connected to the connector 410 of the bus component 400 via a snap-fit ​​mechanism, thereby connecting to the positive and negative terminals of the battery cell. Voltage acquisition can then be performed via the AFE (Analog Front End) chip in the CSC sampling board. In some embodiments, in addition to monitoring the voltage and temperature of the battery cells, the sampling component 500 can also have a fuse etched into its body 510. This fuse automatically disconnects in the event of an abnormal short circuit, thus providing overcurrent protection.

[0170] In this embodiment, the main body 510 can be arranged in the middle of a battery cell or battery module, and sampling portions 520 can extend outward from both ends along the second direction. The engaging portion 420 is formed by curling one end of the connector 410 along the first direction X to form a socket 421, which extends along the second direction Y, and the sampling portion 520 engages in the socket 421.

[0171] The sampling unit 520 includes an elastic segment 530, which may include multiple sub-segments spaced apart along the circumferential direction. During the engagement process, the multiple sub-segments can be squeezed together by the wall of the insertion hole 421, thereby causing the elastic segment to deform and smoothly enter the insertion hole 421. When the elastic segment is inserted into the insertion hole, its deformation can increase the contact area between the hole wall and the elastic segment, ensuring a tight and reliable engagement.

[0172] In this embodiment, by providing a socket extending along the second direction, the sampling unit and the engaging unit can be engaged and connected, and the structure is simple and easy to implement. The sampling unit can be engaged and connected to the engaging part of the connector, thereby realizing the electrical connection between the sampling unit and the connector. Since the engaging connection is a detachable connection, when the sampling component malfunctions, for example, when the fuse blows or the fuse etching is faulty, the sampling unit can be separated from the engaging part, thereby separating the sampling component from the bus component, and then removing the sampling component from the battery device. This allows for convenient replacement of the sampling component without scrapping the entire battery device, saving costs.

[0173] Secondly, compared with the bonding wire connection method in related technologies, the snap-fit ​​connection method provided in this embodiment has a higher strength at the snap-fit ​​connection position than the bonding wire. Therefore, it is not easy to break like the bonding wire under vehicle vibration conditions, and the structure has high reliability, which is beneficial to the stability of voltage sampling.

[0174] Furthermore, by providing a locking portion at one end of the connector along the first direction, the edge portion of the connector can be used to connect the sampling unit to the connector, reserving space for the connection between the connector and the battery cell, which helps improve the reliability of the connection between the connector and the battery cell. At the same time, it can also save space between two adjacent rows of connectors, providing space for arranging the sampling components.

[0175] In addition, the fact that the jack is located at one end of the connector along the first direction can reduce the size of the connector along the second direction, which is beneficial for providing space for the sampling component.

[0176] 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 device, characterized in that, include: Multiple battery cells; A busbar assembly, the busbar assembly including a connector for electrically connecting two adjacent battery cells among the plurality of battery cells, and the connector having a locking portion at one end along a first direction; the locking portion including a socket provided on the connector, the socket extending along a second direction; A sampling assembly includes a body extending along a first direction and a sampling part connected to one end of the body along a second direction. The sampling part engages in the socket to engage and connect the engaging part with the sampling part, thereby realizing the electrical connection between the connector and the sampling part. The first direction is perpendicular to the second direction.

2. The battery device according to claim 1, characterized in that, The engaging portion is located on the side of the connector opposite to the battery cell, and the insertion hole is a through hole extending along the second direction.

3. The battery device according to claim 1, characterized in that, The engaging portion is formed by curling one end of the connector along the first direction.

4. The battery device according to any one of claims 1-3, characterized in that, The sampling section includes an elastic segment, which includes a first sub-segment and a second sub-segment disposed opposite to each other. The first sub-segment and the second sub-segment can move closer to each other under the action of an external force so that the elastic segment engages in the engaging section.

5. The battery device according to claim 4, characterized in that, The first sub-segment has a first arcuate surface that is opposite to the second sub-segment, and the second sub-segment has a second arcuate surface that is opposite to the first sub-segment. The maximum distance between the first arcuate surface and the second arcuate surface first increases and then decreases along the second direction.

6. The battery device according to claim 5, characterized in that, The maximum distance L between the first arcuate surface and the second arcuate surface satisfies: 0.8mm≤L≤1.5mm.

7. The battery device according to claim 4, characterized in that, The elastic segment is made of copper, and the contact resistance R between the elastic segment and the engaging part satisfies: R < 0.5Ω.

8. The battery device according to claim 4, characterized in that, The sampling section further includes a limiting section connected between the elastic segment and the body. One end of the first sub-segment and one end of the second sub-segment are both connected to the limiting section, and the limiting section is used to abut against one end of the engaging portion along the second direction.

9. The battery device according to claim 8, characterized in that, The limiting segment includes a third sub-segment connected to the body and a fourth sub-segment connected between the third sub-segment and the elastic segment, the fourth sub-segment being used to abut against one end of the engaging portion along the second direction; The first dimension of the fourth sub-segment along the first direction increases from the end near the elastic segment to the end near the third sub-segment, and the first dimension D1 of the fourth sub-segment near the third sub-segment and the second dimension D2 of the third sub-segment along the first direction satisfy: D2 < D1.

10. The battery device according to claim 8, characterized in that, The limiting segment is provided with a positioning part for being identified and positioned by the visual recognition module.

11. An electrical appliance, characterized in that, The electrical device includes a battery device as described in any one of claims 1-10, the battery device being used to provide electrical energy.

Images