Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery monomer, a spacing assembly and a wire harness plate assembly, the plurality of battery cells are arranged along the thickness direction of the battery cells. And the spacing assemblies are arranged between the adjacent battery cells. The spacing assembly comprises a spacing piece and a temperature acquisition line, at least part of the temperature acquisition line is embedded into the spacing piece, the temperature acquisition line comprises an acquisition end and a connecting line, and the acquisition end and at least part of the connecting line are arranged between adjacent single batteries. And the wire harness plate assembly is electrically connected with the acquisition end through a connecting wire. The reliability of the battery monomer can be improved.

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] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and rechargeable alkaline zinc-manganese battery cells, among others.

[0003] In the development of battery technology, improving the reliability of individual battery cells has always been a research direction. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can improve the reliability of a single battery cell.

[0005] In a first aspect, this application provides a battery device. The battery device includes battery cells, spacer assemblies, and wiring harness assemblies. Multiple battery cells are arranged along the thickness direction of the battery cells; spacer assemblies are disposed between adjacent battery cells; each spacer assembly includes spacers and temperature sensing lines, at least a portion of which is embedded within the spacers. The temperature sensing lines include sensing ends and connecting lines, with the sensing ends and at least a portion of the connecting lines disposed between adjacent battery cells; the wiring harness assemblies are electrically connected to the sensing ends via the connecting lines.

[0006] In the above scheme, by placing temperature acquisition lines between adjacent battery cells, the temperature of the area between adjacent battery cells can be captured, providing a more comprehensive reflection of the temperature state of the battery cells. This not only reduces the risk of localized overheating or uneven temperature distribution within battery cells but also helps the battery management system detect signs of thermal runaway earlier, optimize charging and discharging strategies, achieve balanced management of battery cells, and improve the reliability of the battery device. Simultaneously, it reduces the space required for the temperature acquisition lines within the battery device, increasing the volumetric energy density of the battery device.

[0007] In some embodiments, the spacer includes a heat insulation layer, at least a portion of the temperature acquisition line is embedded in the heat insulation layer, and a channel is provided between the acquisition end and the battery cell.

[0008] In the above scheme, the heat insulation layer can isolate temperature conduction between adjacent battery cells, reducing the risk of successive thermal runaway of adjacent battery cells caused by the thermal runaway of a single battery cell. The channel can transmit the temperature generated by the battery cells and allow the acquisition end to capture it, improving the reliability of the battery device and the performance of the battery cells.

[0009] In some embodiments, the opening area of ​​the channel near the battery cell is larger than the opening area of ​​the channel near the acquisition end, so that the acquisition end can capture the temperature of a larger area of ​​the battery cell, increase the temperature detection area of ​​the temperature acquisition line, and at the same time reduce the area of ​​the acquisition end exposed in the channel, reduce the possibility of the connecting line being exposed in the channel, and improve the overall strength of the spacer.

[0010] In some embodiments, a heat-conducting element is provided in the channel. One end of the heat-conducting element abuts against the battery cell, and the other end of the heat-conducting element abuts against the acquisition end. The heat-conducting element can reduce the heat loss on the temperature conduction path of the battery cell during operation to the acquisition end, improve the accuracy of the temperature information captured by the acquisition end, and the heat-conducting element can also support the channel and improve the overall strength of the spacer.

[0011] In some embodiments, the spacer further includes a buffer layer, into which at least a portion of the temperature acquisition line is embedded.

[0012] In the above scheme, the material of the buffer layer can be an elastic deformation material, which will undergo a certain degree of expansion deformation during the operation of the battery cell. The buffer layer is deformed under the compression of the expansion deformation of the battery cell, thereby reducing the interaction force between the battery cell and the buffer layer and improving the reliability of the battery cell.

[0013] In some embodiments, the spacer further includes an adhesive layer, into which at least a portion of the temperature acquisition line is embedded. The adhesive layer can fix the temperature acquisition line between adjacent battery cells, reducing the possibility of relative displacement between the temperature acquisition line and the battery cells under external and internal load forces, improving the accuracy of temperature acquisition line in capturing temperature information, and improving the reliability of the battery device.

[0014] In some embodiments, the number of temperature acquisition lines includes multiple lines, the spacer includes a first sidewall opposite to each other along a first direction, and the distance between the acquisition end of at least some of the multiple temperature acquisition lines and the first sidewall is different; and / or, the spacer includes a second sidewall opposite to each other along a second direction, and the distance between the acquisition end of at least some of the multiple temperature acquisition lines and the second sidewall is different.

[0015] The above scheme helps to increase the area for detecting the temperature of individual battery cells, enabling more comprehensive monitoring of the temperature of individual battery cells, reducing the risk of local overheating or uneven temperature distribution in individual battery cells, and also helping the battery management system to detect signs of thermal runaway earlier, optimize charging and discharging strategies, achieve balanced management of individual battery cells, and improve the reliability of the battery device.

[0016] In some embodiments, the spacer includes two second sidewalls disposed opposite each other along a second direction, and in the direction from one of the two second sidewalls to the other, the distance between the acquisition end of at least a portion of the multiple temperature acquisition lines and the first sidewall gradually decreases.

[0017] The above scheme is beneficial for detecting the temperature of different regions of the battery cell along the first direction, reducing the number of temperature acquisition lines, simplifying the wiring harness layout, and reducing manufacturing costs.

[0018] In some embodiments, the distance between the acquisition end and the adjacent battery cells is equal.

[0019] In the above scheme, the distance between the acquisition end and one of the battery cells is equal to the distance between the acquisition end and another battery cell. This can reduce the possibility of errors in the temperature detection accuracy of adjacent battery cells caused by different interval distances, improve the acquisition accuracy of the temperature acquisition line, and enable the battery management system to more accurately control the input / output power of the battery device, thereby improving the overall performance of the battery device.

[0020] In some embodiments, the wiring harness assembly includes an isolator and a sampling line. The isolator is located on one side of a plurality of battery cells along a first direction, and at least a portion of the sampling line is disposed on the side of the isolator facing away from the battery cells. The temperature acquisition line is electrically connected to the sampling line.

[0021] The above solution simplifies the connection structure between the wire harness assembly and the temperature acquisition line, reduces assembly difficulty, and improves production efficiency.

[0022] In some embodiments, the connecting line includes a first segment and a second segment connected to each other, the first segment being embedded in a spacer, and at least a portion of the second segment being located on the side of the spacer facing away from the battery cell and electrically connected to the sampling line.

[0023] The above solution can reduce the difficulty of connecting the temperature acquisition line and the sampling line, reduce the possibility of separation of the temperature acquisition line and the sampling line under external load, and improve the reliability of the connection.

[0024] Secondly, embodiments of this application provide an electrical device, including the battery device in any of the foregoing embodiments, the battery device being used to provide electrical energy to the electrical device.

[0025] 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

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0028] Figure 2 This is an exploded structural diagram of a battery device provided in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application;

[0030] Figure 4 This is a cross-sectional structural diagram of a battery device provided in an embodiment of this application;

[0031] Figure 5 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application;

[0032] Figure 6 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application;

[0033] Figure 7 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application;

[0034] Figure 8 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application;

[0035] Figure 9 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application;

[0036] Figure 10 This is an exploded structural diagram of another battery device provided in the embodiments of this application;

[0037] Figure 11 This is an exploded structural diagram of another battery device provided in the embodiments of this application;

[0038] Figure 12 This is a top view of a battery device provided in an embodiment of this application.

[0039] Marker description

[0040] 1000, vehicles;

[0041] 100. Battery assembly; 200. Controller; 300. Motor; 400. Housing; 410. First housing section; 420. Second housing section; 430. Receiving section; 500. Battery module; 600. Battery management system;

[0042] 10. Battery cell; 11. Electrode terminals;

[0043] 20. Spacer assembly; 21. Spacer; 211. Thermal insulation layer; 212. Buffer layer; 213. Adhesive layer; 22. Temperature acquisition line; 221. Acquisition end; 222. Connecting line; 222a. First segment; 222b. Second segment; 30. Wiring harness assembly; 31. Isolator; 32. Sampling line; T. Channel; 40. Thermal conductive component; L1. First sidewall; L2. Second sidewall; X. First direction; Y. Second direction; Z. Thickness direction. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0047] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0048] 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.

[0049] 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.

[0050] 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: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0051] 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).

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0057] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0058] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0059] 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.

[0060] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0061] 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.

[0062] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0068] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied 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 battery device applications, market demand is also constantly increasing.

[0069] In current battery device designs, the Battery Management System (BMS) needs to comprehensively control and adjust the input / output power of the battery device based on factors such as the state of charge (SOC) and operating temperature of individual battery cells. However, in current battery devices, temperature acquisition lines are typically only installed on the top of the individual battery cells. Because the temperature distribution varies between different areas inside and outside the battery cell during operation, this single-location temperature detection method cannot accurately reflect the actual operating temperature of the individual cell. This inaccuracy in temperature monitoring can lead to misjudgments of the battery state by the BMS, thereby affecting the optimal input / output power control of the battery device, causing power errors, and potentially even impacting battery reliability.

[0070] To address the aforementioned technical problems, this application provides a technical solution that, by placing temperature acquisition lines between adjacent battery cells, captures the temperature of the region between adjacent cells, providing a more comprehensive reflection of the temperature state of the battery cells. This not only reduces the risk of localized overheating or uneven temperature distribution within battery cells but also helps the battery management system detect signs of thermal runaway earlier, optimize charging and discharging strategies, achieve balanced management of battery cells, and improve the reliability of the battery device. Simultaneously, it reduces the space required for the temperature acquisition lines within the battery device, thereby increasing the volumetric energy density of the battery device.

[0071] The technical solutions described in the embodiments of this application are applicable to vehicles. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.

[0072] The technical solutions described in this application are applicable to batteries and electrical devices that use batteries. Electrical devices include, for example, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft. Electric toys include, for example, stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include, for example, 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.

[0073] The battery cells described in this application are not limited to the electrical devices described above, but for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0074] Please see Figure 1 , Figure 1 This is a schematic diagram of a vehicle structure provided in an embodiment of this application. The vehicle 1000 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 battery device 100 can be installed inside the vehicle 1000; specifically, for example, the battery device 100 can be installed 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, for example, is used to control the battery to supply power to the motor 300. The battery can be used for starting the vehicle 1000, navigation, etc. Of course, the battery device 100 can also be used to drive the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide propulsion for the vehicle 1000.

[0075] like Figure 2 As shown, Figure 2 This is an exploded structural diagram of a battery device provided in an embodiment of this application. The battery device 100 includes a housing 400 and individual battery cells (not shown in the figure), with the individual battery cells housed within the housing 400.

[0076] The housing 400 is used to house individual battery cells, and the housing 400 can have various structures. In some embodiments, the housing 400 may include a first housing portion 410 and a second housing portion 420, which overlap each other, and together define a receiving portion 430 for housing the individual battery cells. The second housing portion 420 may be a hollow structure with one end open, and the first housing portion 410 may be a plate-like structure, with the first housing portion 410 covering the open side of the second housing portion 420 to form a housing with the receiving portion 430; alternatively, both the first housing portion 410 and the second housing portion 420 may be hollow structures with one side open, with the open side of the first housing portion 410 covering the open side of the second housing portion 420 to form a housing 400 with the receiving portion 430. Of course, the first housing portion 410 and the second housing portion 420 can have various shapes, such as cylinders, cuboids, etc.

[0077] In the battery device 100, there can be one or more battery cells. If there are multiple battery cells, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, in parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells is housed within the housing 400. Alternatively, multiple battery cells can first be connected in series, in parallel, or in a mixed configuration to form a battery module 500, and then the multiple battery modules 500 can be connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 400.

[0078] Figure 3 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application.

[0079] In some embodiments, such as Figure 3 As shown, there are multiple battery cells 10. These multiple battery cells 10 are first connected in series, parallel, or in a mixed manner to form a battery module 500. The multiple battery modules 500 are then connected in series, parallel, or in a mixed manner to form a whole, which is housed in the casing.

[0080] Figure 4 This is a cross-sectional structural diagram of a battery device provided in an embodiment of this application.

[0081] like Figure 3 and Figure 4As shown, this application embodiment provides a battery device 100. The battery device 100 includes battery cells 10, spacer components 20, and wiring harness assembly 30. Multiple battery cells 10 are arranged along the thickness direction Z of the battery cells 10; the spacer components 20 are disposed between adjacent battery cells 10; the spacer components 20 include spacers 21 and temperature acquisition lines 22, at least a portion of the temperature acquisition lines 22 is embedded in the spacers 21, and the temperature acquisition lines 22 include acquisition terminals 221 and connecting lines 222, the acquisition terminals 221 and at least a portion of the connecting lines 222 are disposed between adjacent battery cells 10; the wiring harness assembly 30 is electrically connected to the acquisition terminals 221 via the connecting lines 222.

[0082] In some examples, the battery device 100 also includes a housing 400, and multiple battery devices 100 and spacer components 20 may all be located within the housing 400.

[0083] In some examples, the wiring harness assembly 30 may be located on one side of the battery cell 10. Optionally, the wiring harness assembly 30 may be electrically connected to the battery management system 600.

[0084] For example, multiple battery cells 10 are arranged sequentially along the thickness direction Z to form a battery pack, and the battery device 100 may include one or more battery packs. When the battery device 100 includes multiple battery packs, the multiple battery packs may be arranged along the length or width direction of the battery cells 10. Optionally, adjacent battery cells 10 in multiple battery packs may share the same spacer component 20, or independent spacer components 20 may be provided between each of the multiple battery packs.

[0085] It is understandable that the sidewall area of ​​the battery cell 10 along the thickness direction Z is usually larger than the sidewall area of ​​the battery cell 10 along other directions (such as the length direction and width direction of the battery cell 10). Multiple battery cells 10 are arranged along the thickness direction Z so that the sidewalls with larger areas among the multiple battery cells 10 are arranged adjacent to each other. The acquisition end 221 of the temperature acquisition line 22 can capture the temperature at the position of the sidewall with larger area among the battery cells 10.

[0086] Spacer 21 is disposed between adjacent battery cells 10. Spacer 21 can play a role in buffering, heat insulation and fixing.

[0087] In some examples, the entire structure of the temperature acquisition line 22 is embedded within the spacer 21; in other examples, a portion of the structure of the temperature acquisition line 22 is embedded within the spacer 21, while another portion (e.g., a portion of the acquisition line) extends outside the spacer 21.

[0088] The temperature acquisition line 22 includes an acquisition end 221 and a connecting line 222. The acquisition end 221 can capture the temperature of the battery cell 10 in the area where the acquisition end 221 is located. As an example, the acquisition end 221 can be a temperature detection sensor, or it can be a conductor structure made of a temperature-sensitive material. The connecting line 222 connects to the acquisition end 221. When the acquisition end 221 is a temperature detection sensor, it can transmit the detected temperature information to the wiring harness assembly 30, and then the wiring harness assembly 30 transmits it to the battery management system 600. When the acquisition end 221 is a conductor structure made of a temperature-sensitive material, the temperature information can be measured based on the change in resistance of the conductor structure.

[0089] Optionally, the number of temperature acquisition lines 22 can be one or more.

[0090] Optionally, when there are multiple temperature acquisition lines 22, the acquisition ends 221 of the multiple temperature acquisition lines 22 can capture the temperature of different areas of the battery cell 10. For example, the temperature of the middle area, corner area, or specific local area of ​​the sidewall of the battery cell 10 with a large area can be captured.

[0091] Optionally, when there are multiple temperature acquisition lines 22, the multiple temperature acquisition lines 22 are respectively connected to the wire harness assembly 30.

[0092] Optionally, the acquisition end 221 can be embedded inside the spacer 21, the spacer 21 can cover the acquisition end 221, or the spacer 21 can expose the acquisition end 221.

[0093] Optionally, at least a portion of the connecting line 222 is embedded in the spacer 21. For example, the entire structure of the connecting line 222 is embedded in the spacer 21, or a portion of the connecting line 222 is embedded in the spacer 21 and another portion of the connecting line 222 extends outside the spacer 21.

[0094] Optionally, the portion of the connecting line 222 within the spacer 21 may extend in a single direction or in multiple directions, or may be wound into shape; for example, the shape of the portion of the connecting line 222 within the spacer 21 may be straight, L-shaped, Z-shaped, or other shapes.

[0095] In some examples, the sensing end 221 is located between two adjacent battery cells 10, and the sensing end 221 can collect the temperature of the area where the sensing end 221 is located in the two adjacent battery cells 10. In other examples, two sensing ends 221 are set at the same location of two adjacent battery cells 10, and the two sensing ends 221 respectively capture the temperature of the battery cell 10 adjacent to them. Optionally, the two sensing ends 221 can be separated by a heat-insulating material.

[0096] In the battery device 100 provided in this application embodiment, by placing the temperature acquisition line 22 between adjacent battery cells 10, the temperature of the region between adjacent battery cells 10 can be captured, providing a more comprehensive reflection of the temperature state of the battery cells 10. This not only reduces the risk of local overheating or uneven temperature in the battery cells 10, but also helps the battery management system 600 detect signs of thermal runaway earlier, optimize charging and discharging strategies, achieve balanced management of the battery cells 10, and improve the reliability of the battery device 100. Simultaneously, it can also reduce the space required for the temperature acquisition line 22 within the battery device 100, thereby increasing the volumetric energy density of the battery device 100.

[0097] Figure 5 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application.

[0098] like Figure 5 As shown, in some optional embodiments, the spacer 21 includes a heat insulation layer 211, at least a portion of the temperature acquisition line 22 is embedded in the heat insulation layer 211, and a channel T is provided between the acquisition end 221 and the battery cell 10.

[0099] The heat insulation layer 211 can isolate the temperature conduction between adjacent battery cells 10, reducing the risk of successive thermal runaway of adjacent battery cells 10 caused by the thermal runaway of a single battery cell 10. The channel T can transmit the temperature generated by the battery cell 10 and allow the acquisition end 221 to capture it, improving the reliability of the battery device 100 and the performance of the battery cells 10.

[0100] In some examples, the entire structure of the temperature acquisition line 22 is embedded within the insulation layer 211; in other examples, a portion of the structure of the temperature acquisition line 22 is embedded within the insulation layer 211, while another portion (e.g., a portion of the acquisition line) extends outside the insulation layer 211.

[0101] Optionally, at least a portion of the connecting wire 222 may be embedded within the heat insulation layer 211, thereby reducing the likelihood that the temperature generated by the battery cell 10 will affect the connecting wire 222 and improving the service life of the temperature acquisition wire 22.

[0102] Channel T can expose the acquisition terminal 221 to the outside environment so that the acquisition terminal 221 can capture the temperature generated by the battery cell 10. Optionally, there can be one or more channels T, for example, one channel T connects the acquisition terminal 221 and the space where the battery cell 10 is located; or, multiple channels T connect one acquisition terminal 221 and the space where the battery cell 10 is located.

[0103] Optionally, there may be two channels T corresponding to one acquisition terminal 221 along the thickness direction Z, and the two channels T respectively connect the space between two adjacent battery cells 10 and the acquisition terminal 221.

[0104] Optionally, the radial dimension of the channel T along its own extension direction can be constant.

[0105] Figure 6 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application.

[0106] like Figure 6 As shown, in some optional embodiments, the opening area of ​​the end of the channel T near the battery cell 10 is larger than the opening area of ​​the end of the channel T near the acquisition end 221, so that the acquisition end 221 can capture the temperature of a larger area of ​​the battery cell 10, increase the temperature detection area of ​​the temperature acquisition line 22, and at the same time reduce the area of ​​the acquisition end 221 exposed in the channel T, reduce the possibility of the connecting line 222 being exposed in the channel T, and improve the overall strength of the spacer 21.

[0107] Optionally, the radial dimension of the channel T gradually decreases in the direction from the battery cell 10 to the spacer assembly 20.

[0108] Figure 7 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application.

[0109] like Figure 7 As shown, in some optional embodiments, a heat-conducting element 40 is provided in the channel T. One end of the heat-conducting element abuts against the battery cell 10, and the other end of the heat-conducting element 40 abuts against the acquisition end 221. The heat-conducting element 40 can reduce the heat loss on the temperature conduction path of the temperature generated by the battery cell 10 during operation to the acquisition end 221, improve the accuracy of the temperature information captured by the acquisition end 221, and the heat-conducting element 40 can also support the channel T and improve the overall strength of the spacer 21.

[0110] Optionally, the thermal conductivity of the heat-conducting element 40 is greater than that of the heat-insulating element.

[0111] Optionally, the material of the heat conductor 40 can be a fusible heat conductor. For example, when the temperature generated by the battery cell 10 during operation is within the threshold temperature, the heat conductor 40 can be a solid heat conductor 40. When the temperature generated by the battery cell 10 is equal to or exceeds the threshold temperature (e.g., thermal runaway temperature), the heat conductor 40 melts into a liquid and loses its heat conduction function or forms a heat insulation layer 211.

[0112] Figure 8 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application.

[0113] like Figure 8 As shown, in some alternative embodiments, the spacer 21 further includes a buffer layer 212, into which at least a portion of the temperature acquisition line 22 is embedded.

[0114] The material of the buffer layer 212 can be an elastic deformation material. During the operation of the battery cell 10, it will expand and deform to a certain extent. The buffer layer 212 is deformed under the compression of the expansion and deformation of the battery cell 10, thereby reducing the interaction force between the battery cell 10 and the buffer layer 212 and improving the reliability of the battery cell 10.

[0115] In some examples, the entire structure of the temperature acquisition line 22 is embedded within the buffer layer 212; in other examples, a portion of the structure of the temperature acquisition line 22 is embedded within the buffer layer 212, while another portion (e.g., a portion of the acquisition line) extends outside the buffer layer 212.

[0116] Optionally, a channel T may be provided in the area where the buffer layer 212 is located between the acquisition end 221 and the battery cell 10, or a buffer material may be provided in the area where the buffer layer 212 is located between the acquisition end 221 and the battery cell 10.

[0117] In some examples, the spacer 21 includes a heat insulation layer 211 and a buffer layer 212, the buffer layer having a receiving area, and the heat insulation layer 211 disposed within the receiving area. Optionally, the receiving area may extend through the buffer layer 212 along the thickness direction Z, or it may be recessed along the surface of the buffer layer 212 along the thickness direction Z to form a groove.

[0118] Optionally, the receiving area can be set in the middle area of ​​the buffer layer 212, or the receiving area can be set in the edge area of ​​the buffer layer 212.

[0119] In some alternative embodiments, the spacer 21 further includes an adhesive layer 213, into which at least a portion of the temperature acquisition line 22 is embedded. The adhesive layer can fix the temperature acquisition line 22 between adjacent battery cells 10, reducing the possibility of relative displacement between the temperature acquisition line 22 and the battery cell 10 under external and internal load forces, improving the accuracy of temperature acquisition line 22 in capturing temperature information, and improving the reliability of battery device 100.

[0120] In some examples, the entire structure of the temperature acquisition line 22 is embedded within the adhesive layer 213; in other examples, a portion of the structure of the temperature acquisition line 22 is embedded within the adhesive layer 213, while another portion (e.g., a portion of the acquisition line) extends outside the adhesive layer 213.

[0121] Optionally, the spacer 21 may include a heat insulation layer 211 and an adhesive layer 213. The adhesive layer may be located between the heat insulation layer 211 and the battery cell 10. At least a portion of the temperature acquisition line 22 may be embedded in either the heat insulation layer 211 or the adhesive layer 213.

[0122] Optionally, the spacer 21 may also include a buffer layer 212 and an adhesive layer 213, the adhesive layer being located between the buffer layer 212 and the battery cell 10, and at least a portion of the temperature acquisition line 22 being embedded in either the buffer layer 212 or the adhesive layer 213.

[0123] Figure 9 This is a cross-sectional structural schematic diagram of another battery device provided in the embodiments of this application.

[0124] like Figure 9 As shown, optionally, the spacer 21 may further include a heat insulation layer 211, a buffer layer 212, and an adhesive layer 213. The adhesive layer may be located between at least one of the heat insulation layer 211 and the buffer layer 212 and the battery cell 10, and the adhesive layer 213 may also be located between the heat insulation layer 211 and the buffer layer 212. Of course, the spacer 21 may also include only the adhesive layer 213.

[0125] Figure 10 This is an exploded structural diagram of another battery device provided in the embodiments of this application.

[0126] Figure 11 This is an exploded structural diagram of another battery device provided in the embodiments of this application.

[0127] like Figure 10 and Figure 11 As shown, in some optional embodiments, the number of temperature acquisition lines 22 includes multiple lines, the spacer 21 includes a first sidewall L1 opposite to each other along the first direction X, and the distance between the acquisition end 221 of at least some of the multiple temperature acquisition lines 22 and the first sidewall L1 is different; and / or, the spacer 21 includes a second sidewall L2 opposite to each other along the second direction Y, and the distance between the acquisition end 221 of at least some of the multiple temperature acquisition lines 22 and the second sidewall L2 is different.

[0128] Optionally, the first direction X can be the length direction of the battery cell 10, and the second direction Y can be the width direction of the battery cell 10. Of course, the first direction X can also be the width direction of the battery cell 10, and the second direction Y can be the length direction of the battery cell 10.

[0129] Optionally, the battery cell 10 further includes an electrode terminal 11, which is disposed on at least one side of the battery cell 10 along the first direction X.

[0130] The spacer 21 may include two first sidewalls L1 opposite each other along the first direction X. The distances between the acquisition ends 221 of the multiple temperature acquisition lines 22 and the first sidewall L1 are different. This can be understood as the number of temperature acquisition lines 22 including three, with each of the three temperature acquisition lines 22 having a different distance from the same first sidewall L1. For example, the distance between the acquisition end 221 of the first temperature acquisition line 22 and the first sidewall L1 is a first distance; the distance between the acquisition end 221 of the second temperature acquisition line 22 and the first sidewall L1 is a second distance; and the distance between the acquisition end 221 of the third temperature acquisition line 22 and the first sidewall L1 is a third distance. The first distance, the second distance, and the third distance are different. Optionally, the first distance is greater than the second distance, which is greater than the third distance.

[0131] The temperature acquisition line 22 can extend along the first direction X. Optionally, the first temperature acquisition line 22 can be located between the second and third temperature acquisition lines 22; or, the first, second, and third temperature acquisition lines 22 can be arranged sequentially along the second direction Y; or, the third temperature acquisition line 22 can be located between the first and second temperature acquisition lines 22. Of course, the number of temperature acquisition lines 22 can also include more, and this embodiment does not limit this.

[0132] In some examples, the distances between the acquisition ends 221 of the multiple temperature acquisition lines 22 and the first sidewall L1 are different. In other examples, the distances between the acquisition ends 221 of some of the multiple temperature acquisition lines 22 and the first sidewall L1 are different, while the distances between the acquisition ends 221 of another portion of the multiple temperature acquisition lines 22 and the first sidewall L1 are the same.

[0133] The spacer 21 may include two adjacent second sidewalls L2 along the second direction Y. The distances between the acquisition ends 221 of multiple temperature acquisition lines 22 and the second sidewall L2 are different. This can be understood as the number of temperature acquisition lines 22 including three lines, each with its acquisition ends 221 at different distances from the same second sidewall L2. For example, the distance between the acquisition end 221 of the first temperature acquisition line 22 and the second sidewall L2 is a fourth distance; the distance between the acquisition end 221 of the second temperature acquisition line 22 and the second sidewall L2 is a fifth distance; and the distance between the acquisition end 221 of the third temperature acquisition line 22 and the second sidewall L2 is a sixth distance. The fourth, fifth, and sixth distances are different. Optionally, the fourth distance is greater than the fifth distance, which is greater than the sixth distance.

[0134] The temperature acquisition line 22 can extend along the second direction Y. Optionally, the first temperature acquisition line 22 can be located between the second temperature acquisition line 22 and the third temperature acquisition line 22; or, the first temperature acquisition line 22, the second temperature acquisition line 22, and the third temperature acquisition line 22 can be arranged sequentially along the second direction Y; or, the third temperature acquisition line 22 can be located between the first temperature acquisition line 22 and the second temperature acquisition line 22. Of course, the number of temperature acquisition lines 22 can also include more, and this embodiment does not limit this.

[0135] In some examples, the distances between the acquisition ends 221 of the multiple temperature acquisition lines 22 and the second sidewall L2 are different. In other examples, the distances between the acquisition ends 221 of some of the multiple temperature acquisition lines 22 and the second sidewall L2 are different, while the distances between the acquisition ends 221 of another portion of the multiple temperature acquisition lines 22 and the second sidewall L2 are the same.

[0136] In some examples, the distances between the sensing ends 221 of at least some of the multiple temperature sensing lines 22 and the first sidewall L1 are different, and the distances between the sensing ends 221 of at least some of the multiple temperature sensing lines 22 and the second sidewall L2 are different. In other examples, the distances between the sensing ends 221 of at least some of the multiple temperature sensing lines 22 and the first sidewall L1 are different. In still other examples, the distances between the sensing ends 221 of at least some of the multiple temperature sensing lines 22 and the second sidewall L2 are different.

[0137] The embodiments of this application, through the above-described settings, facilitate the increase of the area for temperature detection of the battery cell 10, enabling more comprehensive monitoring of the temperature of the battery cell 10, reducing the risk of local overheating or uneven temperature of the battery cell 10, and also helping the battery management system 600 to detect signs of thermal runaway earlier, optimize charging and discharging strategies, achieve balanced management of the battery cell 10, and improve the reliability of the battery device 100.

[0138] like Figure 11 As shown, in some optional embodiments, the spacer 21 includes two second sidewalls L2 disposed opposite to each other along the second direction Y, and in the direction from one of the two second sidewalls to the other, the distance between the acquisition end 221 of at least a portion of the temperature acquisition lines 22 and the first sidewall L1 gradually decreases.

[0139] In some examples, in the direction from one of the two second sidewalls L2 to the other, the distance between the sampling ends 221 of the multiple temperature sampling lines 22 and the first sidewall L1 gradually decreases. In other examples, in the direction from one of the two second sidewalls L2 to the other, the distance between the sampling ends 221 of a portion of the multiple temperature sampling lines 22 and the first sidewall L1 gradually decreases, while the distance between the sampling ends 221 of another portion of the multiple temperature sampling lines 22 and the first sidewall L1 is equal or gradually increases.

[0140] As an example, one of the two second sidewalls L2 points in the direction of the other, that is, the first second sidewall L2 points in the direction of the second second sidewall L2. There are three temperature acquisition lines 22: the first, second, and third temperature acquisition lines 22 are arranged sequentially along the direction from the first second sidewall L2 to the second second sidewall L2. The distance between the acquisition end 221 of the first temperature acquisition line 22 and the first sidewall L1 is the first distance; the distance between the acquisition end 221 of the second temperature acquisition line 22 and the first sidewall L1 is the second distance; and the distance between the acquisition end 221 of the third temperature acquisition line 22 and the first sidewall L1 is the third distance. The first distance is greater than the second distance, which is greater than the third distance.

[0141] Optionally, the absolute values ​​of the difference between the first distance and the second distance, and the absolute values ​​of the difference between the second distance and the third distance, can be the same, or they can be different.

[0142] Optionally, the acquisition end 221 of the first temperature acquisition line 22 and the acquisition end 221 of the third temperature acquisition line 22 can be symmetrically arranged with the acquisition end 221 of the second temperature acquisition line 22 as the center of symmetry.

[0143] Optionally, the acquisition end 221 of the second temperature acquisition line 22 can be located in the middle region of the sidewall of the battery cell 10 along the thickness direction Z.

[0144] The embodiments of this application, through the above-described settings, facilitate the detection of the temperature of different regions of the battery cell 10 along the first direction X, reduce the number of temperature acquisition lines 22, simplify the wiring harness arrangement, and reduce manufacturing costs.

[0145] like Figures 4 to 9 As shown, in some optional embodiments, the distance between the acquisition end 221 and the adjacent battery cell 10 is equal.

[0146] As an example, the acquisition terminal 221 is located between two battery cells 10. The distance between the acquisition terminal 221 and one of the battery cells 10 is equal to the distance between the acquisition terminal 221 and the other battery cell 10. This can reduce the possibility of errors in the temperature detection accuracy of adjacent battery cells 10 caused by different interval distances, improve the acquisition accuracy of the temperature acquisition line 22, and enable the battery management system 600 to more accurately control the input / output power of the battery device 100, thereby improving the overall performance of the battery device 100.

[0147] Figure 12 This is a top view of a battery device provided in an embodiment of this application.

[0148] like Figure 9 and Figure 12 As shown, in some optional embodiments, the wiring harness assembly 30 includes an isolator 31 and a sampling line 32. The isolator is located on one side of the plurality of battery cells 10 along a first direction X, and at least a portion of the sampling line 32 is disposed on the side of the isolator 31 facing away from the battery cells 10. The temperature acquisition line 22 is electrically connected to the sampling line 32.

[0149] Optionally, the separator 31 may be located on the side of the electrode terminal 11 facing away from the battery cell 10.

[0150] Optionally, the spacer 31 can be an insulating element.

[0151] Optionally, the spacer 31 may be provided to extend along the thickness direction Z.

[0152] Optionally, the number of sampling lines 32 may include multiple lines, with multiple sampling lines 32 and multiple temperature acquisition lines 22 connected in a one-to-one correspondence.

[0153] Optionally, the temperature acquisition line 22 and the sampling line 32 can be electrically connected by means of soldering, plugging, or other methods. For example, the sampling line 32 may include a soldering end for soldering or a male or female connector for plugging.

[0154] In these alternative embodiments, it is beneficial to simplify the connection structure between the wire harness assembly 30 and the temperature acquisition line 22, reduce assembly difficulty, and improve production efficiency.

[0155] like Figure 9 and Figure 12 As shown, in some alternative embodiments, the connecting line 222 includes a first segment 222a and a second segment 222b connected to each other. The first segment is embedded in the spacer 21, and at least a portion of the second segment 222b is located on the side of the separator 31 facing away from the battery cell 10 and is electrically connected to the sampling line 32.

[0156] Optionally, the first segment 222a of the connector may extend along the first direction X and be located within the spacer 21. The second segment 222b of the connector may include two parts and a bent portion. One part of the second segment 222b extends along the first direction X and is connected to the first segment 222a. Another part of the second segment 222b is connected to the other part of the second segment 222b through the bent portion. The other part of the second segment 222b is located on the side of the separator 31 facing away from the battery cell 10, extends along the thickness direction Z, and is electrically connected to the sampling line 32.

[0157] Optionally, the separator 31 is provided with a connecting hole, through which the second segment 222b can pass so that the second segment 222b extends from the side of the separator 31 toward the battery cell 10 to the side of the separator 31 away from the battery cell 10.

[0158] The embodiments of this application, through the above-described settings, can reduce the difficulty of connecting the temperature acquisition line 22 and the sampling line 32, reduce the possibility of the temperature acquisition line 22 and the sampling line 32 separating under external load, and improve the connection reliability.

[0159] Secondly, embodiments of this application provide an electrical device, including the battery device 100 in any of the foregoing embodiments, the battery device being used to provide electrical energy to the electrical device.

[0160] According to some embodiments of this application, please refer to Figures 3 to 11 The battery device 100 includes battery cells 10, spacer assemblies 20, and wiring harness assembly 30. Multiple battery cells 10 are arranged along the thickness direction Z of the battery cells; the spacer assemblies 20 are disposed between adjacent battery cells 10; the spacer assemblies 20 include spacers 21 and temperature acquisition lines 22, at least a portion of the temperature acquisition lines being embedded within the spacers 21, and the temperature acquisition lines 22 including acquisition terminals 221 and connecting lines 222, with the acquisition terminals and at least a portion of the connecting lines 222 disposed between adjacent battery cells 10; the wiring harness assembly 30 is electrically connected to the acquisition terminals 221 via the connecting lines 222.

[0161] The spacer 21 includes a heat insulation layer 211, at least a portion of the temperature acquisition line 22 is embedded in the heat insulation layer 211, and a channel T is provided between the acquisition end 221 and the battery cell 10; and / or, the spacer 21 also includes a buffer layer 212, at least a portion of the temperature acquisition line 22 is embedded in the buffer layer 212; and / or, the spacer 21 also includes an adhesive layer 213, at least a portion of the temperature acquisition line 22 is embedded in the adhesive layer 213.

[0162] The number of temperature acquisition lines 22 includes multiple lines. The spacer 21 includes a first sidewall L1 that is opposite to each other along the first direction X. The spacer 21 includes two second sidewalls L2 that are opposite to each other along the second direction Y. In the direction from one of the two second sidewalls to the other, the distance between the acquisition end 221 of at least some of the temperature acquisition lines 22 and the first sidewall L1 gradually decreases.

[0163] 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 by, The battery device comprises: a plurality of battery cells arranged along a thickness direction of the battery cells; a spacer component arranged between adjacent battery cells, the spacer component comprising a spacer and a temperature collection wire, at least a portion of the temperature collection wire being embedded in the spacer, the temperature collection wire comprising a collection end and a connecting wire, the collection end and at least a portion of the connecting wire being arranged between adjacent battery cells; a wire harness plate component electrically connected to the collection end through the connecting wire.

2. The battery device according to claim 1, characterized by The spacer comprises a thermal insulation layer, at least a portion of the temperature collection wire being embedded in the thermal insulation layer, a channel being provided between the collection end and the battery cell.

3. The battery device of claim 2, wherein, An opening area of one end of the channel close to the battery cell is greater than an opening area of one end of the channel close to the collection end.

4. The battery device of claim 2, wherein A heat conducting member is provided in the channel, one end of the heat conducting member abutting against the battery cell, and the other end of the heat conducting member abutting against the collection end.

5. The battery device of claim 1, wherein The spacer further comprises a buffer layer, at least a portion of the temperature collection wire being embedded in the buffer layer.

6. The battery device of claim 1, wherein The spacer further comprises an adhesive layer, at least a portion of the temperature collection wire being embedded in the adhesive layer.

7. The battery device of claim 1, wherein The number of the temperature collection wires comprises a plurality of temperature collection wires, the spacer comprises a first side wall opposite along a first direction, a distance between the collection end of at least a portion of the plurality of temperature collection wires and the first side wall being different. And / or, The spacer comprises a second side wall opposite along a second direction, a distance between the collection end of at least a portion of the plurality of temperature collection wires and the second side wall being different.

8. The battery device of claim 7, wherein, The spacer comprises two second side walls opposite along the second direction, in a direction in which one of the two second side walls points to the other, a distance between the collection end of at least a portion of the plurality of temperature collection wires and the first side wall gradually decreases.

9. The battery device of claim 1, wherein, The distance between the collection end and adjacent battery cells is equal.

10. The battery device of claim 1, wherein The wire harness plate component comprises an isolation member and a sampling wire, the isolation member being located on one side of the plurality of battery cells along a first direction, at least a portion of the sampling wire being arranged on a side of the isolation member away from the battery cells, the temperature collection wire being electrically connected to the sampling wire.

11. The battery device of claim 10, wherein, The connecting wire comprises a first segment and a second segment connected to each other, the first segment being embedded in the spacer, at least a portion of the second segment being located on a side of the isolation member away from the battery cells and being electrically connected to the sampling wire.

12. An electrical device, comprising: The battery device is used to provide electric energy for the electric device.

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