Battery device and electric device

Abstract

The embodiment of the utility model discloses a battery device and a power utilization device. The battery device comprises a plurality of rows of battery monomers, a sensor assembly, a first circuit board, a second circuit board, a first connector and a control assembly, the first circuit board extends along a first direction, the second circuit board comprises a first folding section and a straight strip section extending along the first direction, the first folding section is formed by folding part of the second circuit board, and the first folding section is arranged between the straight strip section and the first circuit board. The first circuit board and the second circuit board are both connected with a sensor assembly. The first circuit board and the second circuit board are electrically connected with the first connector, and the second circuit board is electrically connected with the first connector through the first turnover section. The control assembly is electrically connected with the first connector so as to receive information collected by the first circuit board and the second circuit board. Therefore, the cost of the battery device is reduced.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an electrical device. Background Technology

[0002] During operation, power batteries typically require the collection of parameters such as temperature and voltage from individual battery cells to control the battery system. Data obtained from sampling individual cells is usually transmitted to the battery management system via flexible circuit boards. However, current solutions suffer from high costs due to the large amount of materials and components used.

[0003] Therefore, how to reduce the cost of battery devices has become an urgent problem to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical device that can reduce the cost of the battery device.

[0005] In a first aspect, a battery device is provided, comprising multiple rows of battery cells, a sensor assembly, a first circuit board, a second circuit board, a first connector, and a control assembly. Each row of battery cells includes multiple battery cells arranged along a first direction. The first circuit board extends along the first direction, and the second circuit board includes a first folded section and a straight section extending along the first direction. The first folded section is formed by folding the second circuit board and is disposed between the straight section and the first circuit board. Both the first and second circuit boards are connected to the sensor assembly, which is used to sample the battery cells. The first and second circuit boards are electrically connected to the first connector, and the second circuit board is electrically connected to the first connector via the first folded section. The control assembly is electrically connected to the first connector to receive information collected by the first and second circuit boards.

[0006] In the technical solution provided in this application embodiment, the straight segment of the second circuit board is connected to the first connector via a first folded segment. This folding mechanism allows the second circuit board to be connected to the first circuit board via the first connector. On one hand, the second circuit board folds and extends towards the first circuit board, allowing both to be independently cut into regular shapes, thereby improving the layout utilization of the first and second circuit boards and reducing circuit board material costs. On the other hand, connecting multiple circuit boards to the same connector reduces the number of connectors, thus reducing connector costs. Consequently, the cost of the battery device can be reduced.

[0007] In some embodiments, the length of the second circuit board is greater than that of the first circuit board.

[0008] In the technical solution provided in this application embodiment, the length of the second circuit board is greater than that of the first circuit board. After the second circuit board is folded, the length difference between the second circuit board and the first circuit board is reduced, and the second circuit board and the first circuit board can be more easily connected to the first connector, thereby improving the reliability of the connection between the first circuit board and the second circuit board and the first connector, and thus improving the reliability of the battery device.

[0009] In some embodiments, the difference L between the length of the second circuit board and the length of the first circuit board satisfies: 3cm≤L≤40cm.

[0010] In the technical solution provided in this application embodiment, the difference L between the length of the second circuit board and the length of the first circuit board satisfies: 3cm≤L≤40cm. On the one hand, the size of the second circuit board can provide a certain length basis for the first folding section, so that the first folding section can be connected to the first connector across a large distance. On the other hand, the size of the second circuit board is not too long, so as to cause material waste. Thus, the cost of the battery device can be reduced.

[0011] In some embodiments, the second circuit board further includes a second folded segment, which is stacked with a straight segment, and the two ends of the second folded segment are connected to the end of the straight segment near the first connector and the end of the first folded segment near the straight segment.

[0012] In the technical solution provided in this application embodiment, by setting a second folding section to connect the end of the straight section near the first connector with the end of the first folding section near the straight section, the stress from the first folding section can be buffered, thereby reducing the impact of the first folding section on the sensor component function of the straight section, and thus improving the reliability of the battery device.

[0013] In some embodiments, the straight section is provided with a first through hole, and the second folded section is provided with a second through hole, wherein the first through hole and the second through hole at least partially overlap in orthographic projection along the thickness direction of the straight section; wherein the first through hole and the second through hole are used for fasteners to pass through to fix the second circuit board.

[0014] In the technical solution provided in this application embodiment, the straight section and the second folded section are provided with a first through hole and a second through hole, and the second circuit board is fixed through the first through hole and the second through hole. On the one hand, fixing in this way can suppress the torque generated by folding. On the other hand, fixing the second circuit board in this way can double fix the second circuit board, making the fixing effect better, thereby further improving the reliability of the battery device.

[0015] In some embodiments, the second circuit board further includes a third folding section, which is stacked with the first circuit board and connects the end of the first folding section near the first connector to the first connector.

[0016] In some embodiments, the first circuit board is provided with a third through hole, and the third folded section is provided with a fourth through hole, wherein the orthographic projections of the third through hole and the fourth through hole along the thickness direction of the first circuit board at least partially overlap; wherein the third through hole and the fourth through hole are used for fasteners to pass through to fix the first circuit board and the second circuit board.

[0017] In the technical solution provided in this application embodiment, the first circuit board and the third folding section are provided with a third through hole and a fourth through hole, and the first circuit board and the second circuit board are fixed through the third through hole and the fourth through hole. On the one hand, fixing in this way can suppress the torque generated by folding. On the other hand, fixing the first circuit board and the second circuit board in this way can make the orientation of the first circuit board and the second circuit board consistent, thereby further improving the reliability of the battery device.

[0018] In some embodiments, the first connector connects to multiple second circuit boards.

[0019] In some embodiments, the first connector includes a first terminal and a second terminal, the first terminal being used to connect to a first circuit board and the second terminal being used to connect to a second circuit board; wherein the first terminal and the second terminal are arranged along the height direction of the first terminal.

[0020] In some embodiments, the first connector includes a first terminal and a second terminal, the first terminal being used to connect to a first circuit board and the second terminal being used to connect to a second circuit board; wherein the first terminal and the second terminal are arranged along the length direction of the first terminal.

[0021] In a second aspect, an electrical device is provided, comprising: a battery device according to any one of the first aspects, wherein the battery device is used to provide electrical energy.

[0022] Thirdly, an energy storage device is provided, comprising: a battery device according to any one of the first aspects.

[0023] In some embodiments, the electrical device is a vehicle, a ship, or a spacecraft. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a vehicle according to one embodiment of this application is shown;

[0025] Figure 2 A partial structural schematic diagram of the battery device according to an embodiment of this application is shown;

[0026] Figure 3 A top view schematic diagram of a battery device provided in one embodiment of this application is shown;

[0027] Figure 4A schematic diagram of the sampling component provided in an embodiment of this application is shown;

[0028] Figure 5 This application shows Figure 4 A disassembly diagram of the sampling component;

[0029] Figure 6 This diagram illustrates a currently used circuit board layout design.

[0030] Figure 7 This shows another currently used circuit board layout design;

[0031] Figure 8 The diagram shows a layout design of a first circuit board according to a certain embodiment of this application;

[0032] Figure 9 The diagram shows a layout design of a second circuit board according to a certain embodiment of this application;

[0033] Figure 10 A perspective view of a sampling component provided in one embodiment of this application is shown;

[0034] Figure 11 This application shows Figure 10 A magnified view of a portion of the sampling component;

[0035] Figure 12 A schematic diagram of a sampling component provided in another embodiment of this application is shown;

[0036] Figure 13 A perspective view of a first connector in a battery device according to a certain embodiment of this application is shown;

[0037] Figure 14 A schematic diagram of the connection surface of the first connector in a battery device provided in a certain embodiment of this application is shown.

[0038] The accompanying drawings are not drawn to scale.

[0039] Figure label:

[0040] 1-Vehicle; 10-Battery unit; 101-Sensor assembly; 102-First connector; 1021-First terminal; 1022-Second terminal; 11-Housing housing; 111-First housing section; 112-Second housing section; 20-Battery cell; 30-Controller; 300-Sampling assembly; 310-First circuit board; 320-Second circuit board; 321-First folding section; 322-Straight section; 323-Second folding section; 324-Third folding section; 3221-First through hole; 3231-Second through hole; 3101-Third through hole; 3241-Fourth through hole; 40-Motor. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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).

[0048] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0049] 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.

[0050] 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.

[0051] 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 may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0052] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0064] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0065] 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.

[0066] During operation, power batteries typically require the collection of parameters such as temperature and voltage from individual battery cells to control the battery system. Data obtained from sampling individual cells is usually transmitted to the battery management system via flexible circuit boards. However, current solutions suffer from high costs due to the large amount of materials and components used.

[0067] Therefore, how to reduce the cost of battery devices has become an urgent problem to be solved.

[0068] This application provides a battery device including multiple rows of battery cells, a sensor assembly, a first circuit board, a second circuit board, a first connector, and a control assembly. Each row of battery cells includes multiple battery cells arranged along a first direction. The first circuit board extends along the first direction, and the second circuit board includes a first folded section and a straight section extending along the first direction. The first folded section is formed by folding the second circuit board and is disposed between the straight section and the first circuit board. Both the first and second circuit boards are connected to the sensor assembly, which is used to sample the battery cells. The first and second circuit boards are electrically connected to the first connector, and the second circuit board is electrically connected to the first connector via the first folded section. The control assembly is electrically connected to the first connector to receive information collected by the first and second circuit boards.

[0069] In the technical solution provided in this application embodiment, the straight segment of the second circuit board is connected to the first connector via a first folded segment. This folding mechanism allows the second circuit board to be connected to the first circuit board via the first connector. On one hand, the second circuit board folds and extends towards the first circuit board, allowing both to be independently cut into regular shapes, thereby improving the layout utilization of the first and second circuit boards and reducing circuit board material costs. On the other hand, connecting multiple circuit boards to the same connector reduces the number of connectors, thus reducing connector costs. Consequently, the cost of the battery device can be reduced.

[0070] The technical solutions described in the embodiments of this application are applicable to various power devices or energy storage devices that use battery devices.

[0071] 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.

[0072] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0073] For example, such as Figure 1 The diagram shown is a structural schematic 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, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as 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 for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0074] For example, Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown.

[0075] like 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 The embodiments shown are cylindrical or other shapes, but are not limited to these.

[0076] 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.

[0077] 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.

[0078] The following is combined Figures 3 to 5 This application describes a battery device 10 provided in one embodiment.

[0079] Figure 3 A top view schematic diagram of a battery device 10 provided in a certain embodiment of this application is shown; Figure 4 A schematic diagram of the sampling component 300 provided in an embodiment of this application is shown; Figure 5 This application shows Figure 4 A disassembly diagram of the sampling component 300.

[0080] The battery device 10 may also include a sampling component 300, which can collect parameters of the battery cell 20. The parameters of the battery cell 20 may include the voltage, temperature, etc.

[0081] For example, the sampling component 300 may include a first circuit board 310 and a second circuit board 320, and sensor components 101 may be disposed on the first circuit board 310 and the second circuit board 320 to sample the voltage, temperature, etc. of the battery cell 20. This application embodiment does not limit this.

[0082] This application provides a battery device 10, including multiple rows of battery cells 20, a sensor assembly 101, a first circuit board 310, a second circuit board 320, a first connector 102, and a control assembly. Each row of battery cells 20 includes multiple battery cells 20 arranged along a first direction. The first circuit board 310 extends along the first direction, and the second circuit board 320 includes a first folded section 321 and a straight section 322 extending along the first direction. The first folded section 321 is formed by folding the second circuit board 320 and is disposed between the straight section 322 and the first circuit board 310. Both the first circuit board 310 and the second circuit board 320 are connected to the sensor assembly 101, which is used to sample the battery cells 20. The first circuit board 310 and the second circuit board are electrically connected to the first connector 102, and the second circuit board 320 is electrically connected to the first connector 102 through the first folded section 321. The control assembly is electrically connected to the first connector 102 to receive information collected by the first circuit board 310 and the second circuit board 320.

[0083] For the sake of simplicity, the control components are not shown in the figure. Those skilled in the art can set up the control components according to conventional control component setting methods.

[0084] For example, the control component may be a battery management unit, but this application embodiment is not limited thereto.

[0085] For example, the first circuit board 310 and the second circuit board 320 may be flexible circuit boards.

[0086] The number of first circuit boards 310 and second circuit boards 320 can be multiple. For example, there can be 10 first circuit boards 310 and 10 second circuit boards 320. The number of first circuit boards 310 and second circuit boards 320 in this embodiment is not limited to this. The figure exemplifies the arrangement of the first circuit boards 310 and second circuit boards 320 at intervals, but this embodiment is not limited to this. For example, multiple second circuit boards 320 can extend to one first circuit board 310 through the first folding section 321.

[0087] The first connector 102 can transmit the data collected by the first circuit board 310 and the second circuit board 320 to the battery management system so that the battery management system can control the battery cell 20.

[0088] The number of first connectors 102 is not limited. There can be multiple first connectors 102. The number of connectors can be determined according to the number of first circuit boards 310 and second circuit boards 320 and the matching relationship between the number of first circuit boards 310 and second circuit boards 320 and the number of first connectors 102.

[0089] The figure illustrates one folding method for the second circuit board 320, but the second circuit board 320 can also adopt other folding methods, and the embodiments of this application are not limited thereto.

[0090] In this embodiment, the first direction is the X direction, the second direction is the Y direction, and the thickness direction of the first circuit board is the Z direction for illustration, but this embodiment is not limited thereto.

[0091] In the technical solution provided in this application embodiment, the straight segment 322 of the second circuit board 320 is connected to the first connector 102 via the first folded segment 321. The folding mechanism allows the second circuit board 320 to be connected to the first circuit board 310 via the first connector 102. On one hand, the second circuit board 320 folds and extends towards the first circuit board 310, and both the first circuit board 310 and the second circuit board 320 can be independently cut into regular shapes, thereby improving the layout utilization rate of the first circuit board 310 and the second circuit board 320 and reducing the material cost of the circuit boards. On the other hand, multiple circuit boards are connected to the same connector, reducing the number of connectors and thus reducing connector costs. Therefore, the cost of the battery device 10 can be reduced.

[0092] To further illustrate that the battery device 10 provided in this application embodiment can improve the layout utilization of the circuit board, the following further combines... Figures 6 to 9 This document provides a comparison between the circuit board layout design of this application and currently used circuit board designs.

[0093] Figure 6 This diagram illustrates a currently used circuit board layout design. Figure 7 This shows another currently used circuit board layout design; Figure 8 The diagram shows the layout design of a first circuit board 310 according to a certain embodiment of this application; Figure 9 The diagram shows the layout design of a second circuit board 320 provided in one embodiment of this application.

[0094] In the process of circuit board manufacturing, layout is an important step. A reasonable layout design can improve production efficiency and reduce manufacturing costs.

[0095] Circuit board layout refers to combining multiple circuit board designs into a single large board to facilitate production and improve efficiency. During the layout design process, factors such as size, spacing, shape, strength, and stability should be comprehensively considered.

[0096] like Figure 6 As shown, in the related technology, a circuit board design that samples 20 battery cells in multiple rows and connects them to a single connector uses a side-by-side layout when the space between multiple circuit boards is insufficient to insert another circuit board. As an example, Figure 6 The layout uses a 3-piece design with dimensions of 250mm × 1570mm. In this type of design, the gaps between multiple circuit boards account for a relatively large proportion of the layout area, typically greater than 60%, meaning that the material utilization rate is less than 40%. For example... Figure 6 The material utilization rate of the circuit board shown is 34.80%.

[0097] like Figure 7 As shown, even when the space between multiple circuit boards allows for the insertion of another circuit board, improving utilization, the length also increases accordingly. For example, Figure 7 The design, consisting of four boards measuring 250mm × 1900mm, still exhibits a relatively large gap between multiple circuit boards, resulting in a material utilization rate of less than 40%. Figure 7 The material utilization rate of the circuit board shown is 38.34%. The layout area refers to the size of the copper plate of the circuit board.

[0098] like Figure 8 and Figure 9 As shown, the first circuit board 310 and the second circuit board 320 provided in this application embodiment are connected to a connector by folding the second circuit board 320, and both the first circuit board 310 and the second circuit board 320 can be designed as relatively regular elongated strips.

[0099] Since the first circuit board 310 has no additional branches, it can be designed as a long strip, allowing it to be arranged more closely during layout. For example... Figure 8 In this design, the first circuit board 310 is arranged in a layout of 10 pieces, each with a size of 250mm × 1590mm. This arrangement results in a small ratio of the gap between the multiple first circuit boards 310 to the total area of ​​the layout, which can be less than 60%, meaning that the material utilization rate is greater than 40%. For example, Figure 8 The material utilization rate of the first circuit board 310 is 62.60%. Figure 8This is merely an illustrative layout design of the first circuit board 310, and the embodiments of this application are not limited thereto. For example, the utilization rate can be increased or decreased by increasing the length, width, or changing the size of the circuit board. Specifically, when multiple first circuit boards 310 are arranged along the second direction and the minimum spacing between the multiple first circuit boards 310 is 1mm, the same layout area can accommodate 11 first circuit boards 310, thereby increasing the utilization rate to 68.61%. Furthermore, the close arrangement of the second circuit boards 320 can increase the utilization rate to 80%, that is, the ratio of gaps to the layout area is 20%.

[0100] In the technical solution provided in this application embodiment, since the second circuit board 320 and the first circuit board 310 are designed separately, the first circuit board 310 and the second circuit board 320 are connected to the first connector 102 by folding the second circuit board 320. The first circuit board 310 can be designed as a structure without branches, and the layout of the first circuit board 310 can have a large material utilization rate.

[0101] Since the second circuit board 320 is connected to the first connector 102 by a folding mechanism, the second circuit board 320 can also be designed as a long strip, thus avoiding the presence of a branch that significantly occupies width. For example... Figure 9 In this design, the second circuit board 320 is arranged in a layout of 10 pieces, each with a size of 250mm × 1750mm. The minimum spacing between each second circuit board 320 is 2mm. This arrangement results in a small ratio of the gap between multiple second circuit boards 320 to the total area of ​​the layout, which can be less than 60%, meaning that the material utilization rate is greater than 40%. For example, Figure 9 The material utilization rate of the second circuit board 320 is 62.17%. Figure 9 This is merely an illustrative layout design for the second circuit board 320, and the embodiments of this application are not limited to this. For example, the utilization rate can be increased or decreased by increasing the length, width, or changing the circuit board size. Specifically, when multiple second circuit boards 320 are arranged along the second direction and the minimum spacing between the multiple second circuit boards 320 is 1mm, the same layout area can accommodate 11 second circuit boards 320, thereby increasing the utilization rate to over 68%. Furthermore, a close arrangement of the second circuit boards 320 can increase the utilization rate to 80%, that is, the ratio of gaps to the layout area is as low as 20%.

[0102] In the technical solution provided in this application embodiment, since the second circuit board 320 and the first circuit board 310 are designed separately, the first circuit board 310 and the second circuit board 320 are connected to the first connector 102 by folding the second circuit board 320. The second circuit board 320 can be designed as a structure without branches, and the layout of the second circuit board 320 can have a large material utilization rate.

[0103] If the spacing between circuit boards is too small during layout and cutting, the cutting process may interfere with each other. Therefore, when designing the layout spacing, the tolerance of the cutting process should be considered to ensure that the edges of each circuit board are neat after cutting.

[0104] In some possible embodiments, the length of the second circuit board 320 is greater than that of the first circuit board 310.

[0105] Since the second circuit board 320 has a first folding section 321 at one end, the length of the second circuit board 320 along the first direction will be shortened. Therefore, the dimensions of the first circuit board 310 and the second circuit board 320 along the first direction can be balanced by making the length of the second circuit board 320 longer.

[0106] In the technical solution provided in this application embodiment, the length of the second circuit board 320 is greater than that of the first circuit board 310. After the second circuit board 320 is folded, the length difference between the second circuit board 320 and the first circuit board 310 is reduced. The second circuit board 320 and the first circuit board 310 can be more easily connected to the first connector 102, thereby improving the reliability of the connection between the first circuit board 310 and the second circuit board 320 and the first connector 102. As a result, the reliability of the battery device 10 can be improved.

[0107] In some possible embodiments, the difference L between the length of the second circuit board 320 and the length of the first circuit board 310 satisfies: 3cm≤L≤40cm.

[0108] In the technical solution provided in this application embodiment, the difference L between the length of the second circuit board 320 and the length of the first circuit board 310 satisfies: 3cm≤L≤40cm. On the one hand, setting L≥3cm, the size of the second circuit board 320 can provide a certain length basis for the first folding segment 321, so that the first folding segment 321 can be connected to the first connector 102 across a larger distance. On the other hand, setting L≤40cm, the size of the second circuit board 320 will not be too long, thereby causing material waste. Thus, the cost of the battery device 10 can be reduced.

[0109] The following is combined Figure 10 and Figure 11 This application describes the sampling component 300 in a battery device 10 provided in a certain embodiment.

[0110] Figure 10 A perspective view of a sampling component 300 provided in a certain embodiment of this application is shown; Figure 11 This application shows Figure 10 A magnified view of part of the sampling component 300.

[0111] In some possible embodiments, the second circuit board 320 further includes a second folding section 323, which is stacked with the straight section 322. The two ends of the second folding section 323 are connected to the end of the straight section 322 near the first connector 102 and the end of the first folding section 321 near the straight section 322.

[0112] Since the end of the straight section 322 of the second circuit board 320 may also be provided with a sensor assembly 101, the provision of the second folding section 323 can buffer the force on the straight section 322 of the second circuit board 320, and reduce the impact on the function of the sensor assembly 101 of the straight section 322 when the first folding section 321 is subjected to folding force.

[0113] In the technical solution provided in this application embodiment, by setting the second folding section 323 to connect the end of the straight section 322 near the first connector 102 and the end of the first folding section 321 near the straight section 322, the stress from the first folding section 321 can be buffered, thereby reducing the impact of the first folding section 321 on the function of the sensor assembly 101 in the straight section 322, thereby improving the reliability of the battery device 10.

[0114] In some possible embodiments, the straight section 322 is provided with a first through hole 3221, and the second folded section 323 is provided with a second through hole 3231. The first through hole 3221 and the second through hole 3231 at least partially overlap in orthographic projection along the thickness direction of the straight section 322. The first through hole 3221 and the second through hole 3231 are used for fasteners to pass through to fix the second circuit board 320.

[0115] In the technical solution provided in this application embodiment, the straight section 322 and the second folded section 323 are provided with a first through hole 3221 and a second through hole 3231, and the second circuit board 320 is fixed through the first through hole 3221 and the second through hole 3231. On the one hand, fixing in this way can suppress the torque generated by folding. On the other hand, fixing the second circuit board 320 in this way can double fix the second circuit board 320, making the fixing effect better, thereby further improving the reliability of the battery device 10.

[0116] In some possible embodiments, the second circuit board 320 further includes a third folding section 324, which is stacked with the first circuit board 310. The third folding section 324 connects the end of the first folding section 321 near the first connector 102 to the first connector 102.

[0117] In the technical solution provided in this application embodiment, the second circuit board 320 is connected to the first connector 102 through the third folding section 324, and the third folding section 324 is stacked with the first circuit board 310. When the first circuit board 310 and the second circuit board 320 are simultaneously connected to the first connector 102, the first circuit board 310 and the second circuit board 320 can be connected to the first connector 102 more easily, thereby improving the reliability of the connection between the first circuit board 310 and the second circuit board 320 and the first connector 102, and thus improving the reliability of the battery device 10.

[0118] In some possible embodiments, the first circuit board 310 is provided with a third through hole 3101, and the third folded section 324 is provided with a fourth through hole 3241. The orthographic projections of the third through hole 3101 and the fourth through hole 3241 along the thickness direction of the first circuit board 310 at least partially overlap. The third through hole 3101 and the fourth through hole 3241 are used for fasteners to pass through to fix the first circuit board 310 and the second circuit board 320.

[0119] Fasteners can be screws, etc., and this application does not limit them.

[0120] In the technical solution provided in this application embodiment, the first circuit board 310 and the third folding section 324 are provided with a third through hole 3101 and a fourth through hole 3241, and the first circuit board 310 and the second circuit board 320 are fixed through the third through hole 3101 and the fourth through hole 3241. On the one hand, fixing in this way can suppress the torsional force generated by folding. On the other hand, fixing the first circuit board 310 and the second circuit board 320 in this way can make the orientation of the first circuit board 310 and the second circuit board 320 consistent, thereby further improving the reliability of the battery device 10.

[0121] Figure 12 A schematic diagram of a sampling component provided in another embodiment of this application.

[0122] In some possible embodiments, the first connector 102 connects to multiple second circuit boards 320.

[0123] Multiple second circuit boards 320 can be connected to the first connector 102 via the first folding section 321, thereby further reducing the number of first connectors 102 and thus further reducing the cost of the battery device 10.

[0124] The following is combined Figure 13 and Figure 14 This application describes the connection method between the first circuit board 310 and the second circuit board 320 and the first connector 102 in the battery device 10 provided in the embodiments of this application.

[0125] Figure 13A perspective view of the first connector 102 in a battery device 10 provided in a certain embodiment of this application is shown; Figure 14 A schematic diagram of the connection surface of the first connector 102 in a battery device 10 provided in a certain embodiment of this application is shown.

[0126] In some possible embodiments, the first connector 102 includes a first terminal 1021 and a second terminal 1022, the first terminal 1021 being used to connect to the first circuit board 310, and the second terminal 1022 being used to connect to the second circuit board 320; wherein the first terminal 1021 and the second terminal 1022 are arranged along the height direction of the first terminal 1021.

[0127] The height direction of the first terminal 1021 can be illustrated by the h direction in the figure, but the embodiments of this application are not limited thereto.

[0128] In the technical solution provided in this application embodiment, the first terminal 1021 and the second terminal 1022 are arranged along the height direction of the first terminal 1021. The first circuit board 310 and the second circuit board 320 can be connected to the first terminal 1021 and the second terminal 1022 in a stacked manner, thereby reducing the space occupied by the first circuit board 310 and the second circuit board 320, and thus improving the energy density of the battery device 10.

[0129] In some possible embodiments, the first connector 102 includes a first terminal 1021 and a second terminal 1022, the first terminal 1021 being used to connect to the first circuit board 310, and the second terminal 1022 being used to connect to the second circuit board 320; wherein the first terminal 1021 and the second terminal 1022 are arranged along the length direction of the first terminal 1021.

[0130] According to some embodiments of this application, this application also provides an electrical device including the battery device 10 described in any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0131] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

[0132] According to some embodiments of this application, this application also provides an energy storage device, including the battery device 10 described in any of the above embodiments. The energy storage device can also be considered as a form of the battery device 10.

[0133] 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 rows of battery cells (20), each row of battery cells (20) includes multiple battery cells (20) arranged along a first direction. The system comprises a sensor assembly (101), a first circuit board (310), and a second circuit board (320). The first circuit board (310) extends along the first direction. The second circuit board (320) includes a first folded section (321) and a straight section (322) extending along the first direction. The first folded section (321) is formed by folding a portion of the second circuit board (320) and is disposed between the straight section (322) and the first circuit board (310). The sensor assembly (101) is connected to both the first circuit board (310) and the second circuit board (320). The sensor assembly (101) is used to sample the battery cell (20). The first circuit board (310) and the second circuit board (320) are electrically connected to the first connector (102) respectively, and the second circuit board (320) is electrically connected to the first connector (102) through the first folding section (321); The control component is electrically connected to the first connector (102) to receive information collected by the first circuit board (310) and the second circuit board (320).

2. The battery device according to claim 1, characterized in that, The length of the second circuit board (320) is greater than that of the first circuit board (310).

3. The battery device according to claim 2, characterized in that, The difference L between the length of the second circuit board (320) and the length of the first circuit board (310) satisfies: 3cm≤L≤40cm.

4. The battery device according to claim 1, characterized in that, The second circuit board (320) also includes: The second folding section (323) is stacked on top of the straight section (322). The two ends of the second folding section (323) are connected to the end of the straight section (322) near the first connector (102) and the end of the first folding section (321) near the straight section (322).

5. The battery device according to claim 4, characterized in that, The straight section (322) is provided with a first through hole (3221), and the second folded section (323) is provided with a second through hole (3231). The first through hole (3221) and the second through hole (3231) at least partially overlap in orthographic projection along the thickness direction of the straight section (322). The first through hole (3221) and the second through hole (3231) are used for fasteners to pass through to fix the second circuit board (320).

6. The battery device according to claim 4, characterized in that, The second circuit board (320) also includes: The third folding section (324) is stacked with the first circuit board (310). The third folding section (324) connects the end of the first folding section (321) near the first connector (102) to the first connector (102).

7. The battery device according to claim 6, characterized in that, The first circuit board (310) is provided with a third through hole (3101), and the third folded section (324) is provided with a fourth through hole (3241). The orthographic projections of the third through hole (3101) and the fourth through hole (3241) along the thickness direction of the first circuit board (310) at least partially overlap. The third through hole (3101) and the fourth through hole (3241) are used for fasteners to pass through to fix the first circuit board (310) and the second circuit board (320).

8. The battery device according to claim 1, characterized in that, The first connector (102) connects to multiple second circuit boards (320).

9. The battery device according to any one of claims 1 to 8, characterized in that, The first connector (102) includes a first terminal (1021) and a second terminal (1022), the first terminal (1021) being used to connect to the first circuit board (310), and the second terminal (1022) being used to connect to the second circuit board (320). The first terminal (1021) and the second terminal (1022) are arranged along the height direction of the first terminal (1021).

10. The battery device according to any one of claims 1 to 8, characterized in that, The first connector (102) includes a first terminal (1021) and a second terminal (1022), the first terminal (1021) being used to connect to the first circuit board (310), and the second terminal (1022) being used to connect to the second circuit board (320). The first terminal (1021) and the second terminal (1022) are arranged along the length direction of the first terminal (1021).

11. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 10, wherein the battery device is used to provide electrical energy.

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