Battery device and electric appliance

Abstract

The application discloses a battery device and a power utilization equipment. The battery device comprises a battery cell, a fixing member fixed with a first wall, the fixing member being a cavity structure with a first opening, the fixing member comprising a first limiting structure; a sampling member comprising a sampling structure and a second limiting structure, the second limiting structure being matched with the first limiting structure, so that at least part of the sampling member is accommodated in the cavity of the fixing member, and the sampling structure is used for collecting state information of the battery cell. The battery device and the power utilization equipment can improve the efficiency and flexibility of the battery device assembly.

Description

Technical Field

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

[0002] With the continuous advancement of battery technology, various new energy industries that use battery devices as energy storage equipment have developed rapidly. In the development of battery technology, in addition to improving the performance of battery devices, how to improve the assembly flexibility and efficiency of battery devices is also an urgent problem to be solved. Summary of the Invention

[0003] This application provides a battery device and an electrical appliance that can improve the efficiency and flexibility of battery device assembly.

[0004] In a first aspect, a battery device is provided, comprising: a battery cell including a first wall; a fixing member fixed to the first wall, the fixing member being a cavity structure having a first opening, the fixing member including a first limiting structure; and a sampling member including a sampling structure and a second limiting structure, the second limiting structure cooperating with the first limiting structure to accommodate at least a portion of the sampling member within the cavity of the fixing member, the sampling structure being used to collect state information of the battery cell.

[0005] Therefore, in the battery device of this application embodiment, the fixing component and the battery cell are mutually fixed, while the sampling component can be installed in the cavity of the fixing component through the mutual cooperation between the first limiting structure and the second limiting structure. This facilitates the mutual installation and disassembly of the sampling component and the fixing component, allowing the sampling component to be uniformly installed at the customer's site after multiple battery cells are assembled, making the assembly of the battery device more flexible and efficient. In addition, the sampling structure of the sampling component can collect the state information of the battery cells to monitor the state of those battery cells, and promptly detect and handle any abnormalities in the battery cells, thereby improving the reliability of the battery device.

[0006] In some embodiments, the sampling element further includes a floating structure connected to the second limiting structure. This floating structure is used to adjust the distance between the second limiting structure and the first wall. Due to potential dimensional errors caused by the manufacturing process, there may be dimensional differences between different battery cells and connected fasteners. For example, the distance between the first limiting structure and the first wall of the fastener may differ for different battery cells. Therefore, when the second limiting structure of the sampling element and the first limiting structure of the fastener are coupled, the floating structure can dynamically adjust the distance between the second limiting structure and the first wall to adapt to different battery cells, achieving floating installation and making the sampling structure collect battery cell status information more accurately.

[0007] In some embodiments, the floating structure is connected to the sampling structure, and the floating structure is also used to compress at least a portion of the sampling structure toward the first wall. While adjusting the position of the second limiting structure, the floating structure can compress at least a portion of the sampling structure, bringing it closer to the first wall of the battery cell, thereby improving the accuracy of the state information collected by the sampling structure, increasing measurement precision, and ultimately improving the reliability of the structure.

[0008] In some embodiments, the sampling element includes a housing with a groove. The floating structure includes a spring member. One end of the spring member is fixedly connected to the bottom of the groove near the first wall along the thickness direction of the first wall, and the other end of the spring member is fixedly connected to the second limiting structure, so that at least a portion of the second limiting structure slides within the groove. The compression and recovery process of the spring member drives the second limiting structure to slide within the groove, thereby changing the position of the second limiting structure and adjusting the distance between the second limiting structure and the sampling structure.

[0009] In some embodiments, the sampling structure is fixed to the region of the housing near the first wall, and the spring is used to press the bottom of the groove to press at least a portion of the sampling structure toward the first wall. Considering that the size of the sampling structure is typically limited, the indirect pressing of the sampling structure by the spring reduces the size occupied by the spring on the sampling structure, facilitating installation. Furthermore, the spring deforms during compression and recovery; direct connection to the sampling structure would cause it to easily deform, affecting measurement accuracy. However, the housing has relatively high structural strength and is not easily deformed by the spring's compression or stretching. Therefore, even if the spring deforms, the connected sampling structure is less prone to deformation, improving the structural stability of the sampling structure and thus improving measurement accuracy.

[0010] In some embodiments, the housing is provided with a plurality of sliding grooves, and the second limiting structure includes a connected main body and a plurality of protrusions. At least a portion of the main body is housed within the housing, and at least one of the protrusions cooperates with the first limiting structure. The plurality of sliding grooves and the plurality of protrusions correspond one-to-one, so that each protrusion slides within its corresponding sliding groove. By providing a plurality of sliding grooves located at different positions on the housing, the position and balance of the second limiting structure can be adjusted. When at least one protrusion of the second limiting structure cooperates with the first limiting structure, the remaining protrusions can also move synchronously to maintain the balance and stability of the second limiting structure and improve the stability between the cooperating protrusions and the first limiting structure.

[0011] In some embodiments, the plurality of protrusions protrude in different directions relative to the main body to restrict the movement of the second limiting structure from different directions.

[0012] In some embodiments, the sampling structure includes a temperature sensor for acquiring the temperature of the battery cell. The sampling structure also includes a heat-conducting block facing the first wall, with the temperature sensor located on the side of the heat-conducting block away from the first wall, for measuring the temperature of the heat-conducting block. Based on the acquired battery cell temperature, the system monitors whether the battery cell temperature is abnormal, for example, whether the battery cell temperature is too high or too low, and promptly detects and addresses any abnormal battery cell temperature, thereby improving the reliability of the battery device.

[0013] Furthermore, considering that the surface of the first wall of a battery cell may be uneven, and that the battery cell may expand and contract during use, the temperature sensor may not adhere tightly enough or may even detach when in direct contact with the battery cell, thus affecting the accuracy of temperature measurement. Additionally, uneven temperature distribution within the battery cell can also affect the sensor's readings. The heat-conducting block addresses these issues. Its relatively flat surface improves the contact stability between the temperature sensor and the block, and also homogenizes localized temperature fluctuations within the battery cell, thereby enhancing the sensor's measurement accuracy.

[0014] In some embodiments, the sampling element includes a housing having a second opening oriented in the same direction as the first opening. A portion of the temperature sensor is housed within the housing, and another portion of the temperature sensor extends out of the second opening and the first opening. This facilitates both mounting the temperature sensor through the second opening and obtaining the temperature measured by the temperature sensor through the extended end.

[0015] In some embodiments, the heat-conducting block and the outer shell of the sampling element are integrally formed to facilitate processing. Furthermore, since the outer shell has relatively high structural strength, fixing the heat-conducting block to the outer shell improves the stability of the heat-conducting block, thereby increasing temperature transfer efficiency and improving the measurement accuracy of the temperature sensor.

[0016] In some embodiments, the fixing member further includes a third limiting structure, and the sampling member further includes a fourth limiting structure. The fourth limiting structure cooperates with the third limiting structure to position the sampling member between the first limiting structure and the third limiting structure, so as to stably fix the sampling member within the cavity of the fixing member and maintain the balance of the sampling member.

[0017] In some embodiments, the third limiting structure includes a connected limiting portion and an elastic structure. The limiting portion is used to cooperate with the fourth limiting structure. The elastic structure includes a fixed section and a bent section. The bent section connects the limiting portion and the fixed section. A gap exists between the limiting portion and the fixed section along the arrangement direction of the first and third limiting structures. Thus, when the limiting portion is pressed towards the fixed section, the gap can be compressed to increase the distance between the limiting portions of the first and third limiting structures; when the limiting portion is no longer pressed towards the fixed section, the gap can maintain the distance between the first and third limiting structures. The elastic structure facilitates the cooperation between the limiting portion and the fourth limiting structure for mounting the sampling element.

[0018] In some embodiments, the battery device further includes a connection assembly comprising the fixing member, a busbar, and a data acquisition unit. The connection assembly is located on the side of the first wall away from the interior of the battery cell. The busbar is used to electrically connect multiple battery cells, and the data acquisition unit is used to acquire the voltage and / or current of the battery cells. Integrating the fixing member, busbar, and data acquisition unit improves processing and assembly efficiency.

[0019] In a second aspect, an electrical device is provided, comprising: a battery device as described in the first aspect or any embodiment of the first aspect, the battery device being used to provide electrical energy to the electrical device.

[0020] In some embodiments, the electrical equipment is a vehicle, a ship, or a spacecraft. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a vehicle according to one embodiment of this application;

[0022] Figure 2 This is a schematic diagram of a partial structure of a battery device according to an embodiment of this application;

[0023] Figure 3 This is one embodiment of the present application. Figure 2 An enlarged schematic diagram of region A of the battery device shown;

[0024] Figure 4 This is an exploded view of a partial structure of a battery device according to an embodiment of this application;

[0025] Figure 5 This is one embodiment of the present application. Figure 4 An enlarged schematic diagram of region B of the battery device shown;

[0026] Figure 6 This is another schematic diagram of a partial structure of a battery device according to an embodiment of this application;

[0027] Figure 7 This is an exploded view of a partial structure of a battery device according to an embodiment of this application;

[0028] Figure 8 This is a cross-sectional schematic diagram of a partial structure of a battery device according to an embodiment of this application;

[0029] Figure 9 This is an exploded structural diagram of a sampling component according to an embodiment of this application;

[0030] Figure 10 This is a partial structural schematic diagram of a sampling component according to an embodiment of this application;

[0031] Figure 11 This is another partial structural schematic diagram of a sampling component according to one embodiment of this application;

[0032] Figure 12 This is a side view of a partial structure of a battery device according to an embodiment of this application.

[0033] The accompanying drawings are not drawn to scale. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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).

[0042] 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.

[0043] 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.

[0044] In the development of battery technology, to improve the energy density of battery devices, a large number of individual battery cells are typically incorporated. To monitor and manage the state of these cells, sampling components are usually included within the battery device. For example, to collect the temperature of the individual cells, the sampling component can include a temperature sensor, which can be attached to the surface of the cell to monitor temperature changes. Specifically, during battery assembly, the temperature sensor can be directly attached to any surface of the cell, and multiple cells and the temperature sensor can be packaged together into a battery module, housed within the battery device's casing. This entire process does not require on-site installation at the customer's location. However, how to design this installation method to make battery device assembly more flexible for different application scenarios remains a pressing issue.

[0045] Therefore, embodiments of this application provide a battery device and an electrical appliance that can solve the above-mentioned problems. The battery device of this application includes a battery cell, a fixing member, and a sampling member. The battery cell has a first wall, and the fixing member is fixed to the first wall. The fixing member is a cavity structure with a first opening and a first limiting structure. The sampling member includes a sampling structure and a second limiting structure. The first limiting structure and the second limiting structure cooperate to accommodate at least a portion of the sampling member within the cavity of the fixing member, so as to collect the state information of the battery cell through the sampling structure. In this way, the fixing member and the battery cell are mutually fixed, and the sampling member can be installed within the cavity of the fixing member through the mutual cooperation between the first limiting structure and the second limiting structure. This facilitates the mutual installation and disassembly of the sampling member and the fixing member, and allows for the unified installation of the sampling member at the customer's location after assembling multiple battery cells, making the assembly of the battery device more flexible and efficient.

[0046] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0047] 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.

[0048] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0049] 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 60, a controller 50, and a battery device 10 can be installed inside vehicle 1. The controller 50 controls the battery device 10 to supply power to the motor 60. 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, for the electrical system of vehicle 1, such as for the power requirements of vehicle 1's 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.

[0050] Figure 2 A schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown; Figure 3 A partially enlarged schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 3 It can be Figure 2 An enlarged view of region A shown. (See attached image.) Figure 2 and Figure 3 As shown, the battery device 10 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar 121.

[0051] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0052] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0053] In some embodiments, the battery device 10 may be a battery pack, which includes a housing 11 and one or more battery cell assemblies housed in the housing 11.

[0054] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 11 by fixing the battery module in the housing 11.

[0055] As an example, the battery cell assembly can also be housed in the housing 11 by directly fixing multiple battery cells 20 to the housing 11.

[0056] As an example, the housing 11 may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing 11 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0057] As an example, the housing 11 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 11 forms an enclosed space to accommodate the battery cell assembly.

[0058] In some embodiments, the housing 11 may be part of the vehicle's chassis structure. For example, a portion of the housing 11 may be at least a part of the vehicle's floor, or a portion of the housing 11 may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0059] Figure 4 An exploded view of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 4 As shown Figure 2 An exploded view of the battery device 10 after removing the housing 11; Figure 5 An enlarged schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown, for example, Figure 5 It can be Figure 4 An enlarged view of region B shown.

[0060] like Figure 4 and Figure 5 As shown, the battery device 10 in this embodiment may further include a connecting component 12, wherein the connecting component 12 is located on the side of the first wall 21 of the battery cell 20 away from the interior of the battery cell 20, so as to facilitate installation.

[0061] In some embodiments, the connection assembly 12 may include a busbar 121 for electrically connecting multiple battery cells 20. For example, the busbar 121 may be electrically connected to the electrode terminals 22 of the battery cells 20, thereby enabling series, parallel, or mixed series-parallel connections among the multiple battery cells 20.

[0062] In some embodiments, the connection component 12 may further include a data acquisition element 122, which can be used to monitor the status information of the battery cell 20. For example, the status information may include at least one of the voltage, current, or temperature of the battery cell 20. Exemplarily, the data acquisition element 122 may include a wiring harness and acquisition terminals. The acquisition terminals acquire the status information of the battery cell 20, for example, the voltage of the battery cell 20. The acquired status information of the battery cell 20 is transmitted via the wiring harness. For example, the wiring harness may be connected to a Battery Management System (BMS) so that the BMS can receive and process the status information, thereby improving the reliability of the battery device 10.

[0063] In some embodiments, the connecting assembly 12 can integrate the busbar 121 and the data acquisition component 122, so that when the battery device 10 is installed, the connecting assembly 12 can be directly fixed to multiple battery cells 20, improving processing and assembly efficiency. Specifically, the connecting assembly 12 may include a separator plate, and the busbar 121 is fixed to the separator plate. For example, the busbar 121 can be integrally formed with the separator plate by injection molding or other methods. The wiring harness and acquisition terminals included in the data acquisition component 122 can be installed and fixed to the separator plate, so that the busbar 121 and the data acquisition component 122 can be integrated.

[0064] In some embodiments, the battery device 10 may include a battery cell 20, a fixing member 30, and a sampling member 40. Figure 6 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 6 As shown Figure 2 Any one of the battery cells 20 in the battery device 10 shown, and the battery cell 20 is connected to the fixing member 30 and the sampling member 40. Figure 7 An exploded structural diagram of a portion of the battery device 10 according to an embodiment of this application is shown. For example, the... Figure 7 It can be Figure 6 The diagram shown is an exploded view of the structure. Figure 8 A cross-sectional schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown. For example, the... Figure 8 It can be Figure 6 The diagram shows a cross-sectional view of the structure, which is perpendicular to the thickness direction Y of the battery cell 20.

[0065] In the embodiments of this application, such as Figures 2 to 8As shown, the battery cell 20 includes a first wall 21; a fixing member 30 is fixed to the first wall 21, the fixing member 30 is a cavity structure with a first opening 31, and the fixing member 30 includes a first limiting structure 32; the sampling member 40 includes a sampling structure 41 and a second limiting structure 42, the second limiting structure 42 and the first limiting structure 32 cooperate with each other so that at least part of the sampling member 40 is accommodated in the cavity of the fixing member 30, and the sampling structure 41 is used to collect the state information of the battery cell 20.

[0066] The battery cell 20 in this application embodiment can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0067] like Figures 2 to 8 As shown, for ease of explanation, this application embodiment takes a cuboid battery cell 20 as an example, and defines three directions based on the cuboid battery cell 20: the length direction X of the battery cell 20, the thickness direction Y of the battery cell 20, and the height direction Z of the battery cell 20. The length direction X, the thickness direction Y, and the height direction Z are perpendicular to each other, and the size of the battery cell 20 in its length direction X is greater than the size in its thickness direction Y.

[0068] In some implementations, such as Figures 2 to 8 As shown, the battery cell 20 may include a casing. The casing can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing can be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0069] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0070] In some embodiments, the casing of a battery cell 20 of different shapes may include a different number of walls. For example, a cuboid battery cell 20 may include six walls, and the first wall 21 in this embodiment is any one of the walls of the battery cell 20.

[0071] The fastener 30 in this embodiment is fixed to the first wall 21. For example, the fastener 30 and the first wall 21 can be fixed in any way according to the actual application. For example, the fastener 30 and the first wall 21 can be fixed by adhesive, but this embodiment is not limited to this.

[0072] The fixing member 30 in this embodiment is a cavity structure with a first opening 31, and the fixing member 30 includes a first limiting structure 32. Correspondingly, the sampling member 40 includes a sampling structure 41 and a second limiting structure 42, the second limiting structure 42 being able to cooperate with the first limiting structure 32. For example, as Figures 2 to 8 As shown, the first limiting structure 32 may include a groove, and the second limiting structure 42 may include a protrusion 422. The first limiting structure 32 and the second limiting structure 42 cooperate with each other, with at least a portion of the protrusion 422 being accommodated in the groove, so that the first limiting structure 32 and the second limiting structure 42 can mutually restrict each other, thereby achieving relative fixation between the sampling member 40 and the fixing member 30. Alternatively, the first limiting structure 32 may include a protrusion, and the second limiting structure 42 may include a groove. The cooperation between the first limiting structure 32 and the second limiting structure 42 may also include the protrusion of the first limiting structure 32 being accommodated in the groove of the second limiting structure 42, so that the first limiting structure 32 and the second limiting structure 42 can mutually restrict each other. The embodiments of this application are not limited to this.

[0073] In some embodiments, the battery device 10 may include one or more fasteners 30; when multiple fasteners 30 are included, each fastener 30 may be used to fix a sampling element 40, so that the multiple sampling elements 40 fixed by the multiple fasteners 30 can collect the status information of multiple battery cells 20. For example, the multiple fasteners 30 may be independent structures, or the multiple fasteners 30 may be integrated.

[0074] For example, such as Figure 4 and Figure 5 As shown, the connecting assembly 12 is provided with fixing members 30, a busbar component 121, and a data acquisition component 122. That is, the battery device 10 can integrate multiple fixing members 30 through the connecting assembly 12. For example, multiple fixing members 30, busbar components 121, and data acquisition components 122 can be integrated to improve processing and assembly efficiency. Specifically, the multiple fixing members 30 can be integrally formed with the separator plate of the connecting assembly 12 for ease of processing. Thus, by fixing the connecting assembly 12 to the side of the first wall 21 away from the interior of the battery cell 20, the installation of multiple fixing members 30, busbar components 121, and data acquisition components 122 can be completed, improving processing and assembly efficiency.

[0075] For example, the multiple fasteners 30 included in the battery device 10 can also be set separately from the busbar component 121 and the data acquisition component 122. For example, the multiple fasteners 30 included in the battery device 10 are a split structure, and the multiple fasteners 30 and the connecting component 12 can also be set separately, so as to flexibly adjust the position and structure of each fastener 30 and apply it to different application scenarios.

[0076] It should be understood that, in the case of an integrated arrangement of multiple fasteners 30, busbar components 121, and data acquisition components 122, this application implements, for example... Figures 6 to 8 The fastener 30 shown can be a partial structural diagram of the connecting assembly 12; or, in the case where multiple fasteners 30 are separately arranged, this application implements, for example... Figures 6 to 8 The fastener 30 shown can be any structural diagram of a fastener 30, and the embodiments of this application are not limited to this.

[0077] When assembling the battery device 10, at least some of the battery cells 20 within the battery device 10 are provided with fixing members 30, and the sampling member 40 has not yet been installed in the cavity of the fixing member 30 to which the battery cell 20 is connected. For example, as Figures 2 to 5 As shown, the battery device 10 may have only some of the individual battery cells 20 equipped with fixing members 30. Figure 2 Taking a configuration of five battery cells 20 with fixing members 30 as an example, this portion of the battery cells 20 can be fitted with a sampling member 40 for monitoring purposes. As another example, the housing 11 of the battery assembly 10 can have a third opening 111, which exposes the first opening 31 of the fixing member 30. In this way, the battery assembly 10 can be pre-sealed without the sampling member 40 being installed.

[0078] like Figures 6 to 8 As shown, for a battery cell 20 with a fixing member 30, a sampling member 40 can be installed in the cavity of the fixing member 30 through the mutual cooperation between the first limiting structure 32 and the second limiting structure 42. For example, taking the first limiting structure 32 as being located in the cavity of the fixing member 30, the sampling member 40 can be tilted so that the sampling member 40 gradually enters the inner cavity from the first opening 31 of the fixing member 30. The second limiting structure 42 cooperates with the first limiting structure 32 to accommodate at least a portion of the sampling member 40 inside the cavity of the fixing member 30, thereby completing the installation of the sampling member 40 and allowing at least a portion of the sampling structure 41 of the sampling member 40 to face the first wall 21 for sampling.

[0079] The sampling structure 41 of the sampling element 40 can collect the state information of the battery cell 20. For example, the state information may include at least one of the voltage, current, and temperature information of the battery cell 20. By collecting the state information of the battery device 10, the state of the battery cells 20 can be monitored, and abnormalities in the battery cells 20 can be detected and dealt with in a timely manner, thereby improving the reliability of the battery device 10. For example, the state information of the battery cell 20 collected by the sampling element 40 is usually different from the state information of the battery cell 20 collected by the data acquisition element 122, so as to monitor different state information of the battery cells 20 respectively. For example, the sampling element 40 can be used to collect the temperature of the battery cell 20, while the data acquisition element 122 is used to collect the voltage or current of the battery cell 20, but the embodiments of this application are not limited to this.

[0080] In addition, this installation method of the sampling component 40 allows the sampling component 40 to be uniformly installed at the customer's site after the multiple battery cells 20 of the battery device 10 are assembled. Moreover, the sampling component 40 and the fixing component 30 can be installed and disassembled with each other, which makes the assembly of the battery device more flexible and efficient, and makes the battery device 10 suitable for different application scenarios to meet customer needs.

[0081] The sampling member 40 and the fixing member 30 of the present application will now be described with reference to the accompanying drawings.

[0082] Figure 9 An exploded structural diagram of the sampling component 40 according to an embodiment of this application is shown. For example, the Figure 9 It can be like Figures 6 to 8 The exploded structure diagram of the sampling component 40 shown.

[0083] In some embodiments, the sampling element 40 further includes a floating structure 43 connected to the second limiting structure 42, the floating structure 43 being used to adjust the distance between the second limiting structure 42 and the first wall 21. Figures 6 to 9 As shown, since the floating structure 43 is connected to the second limiting structure 42, when the second limiting structure 42 and the first limiting structure 32 cooperate with each other, the floating structure 43 can drive the second limiting structure 42 to move, so as to flexibly adjust the position of the second limiting structure 42, and thus adjust the distance between the second limiting structure 42 and the first wall 21.

[0084] Due to potential dimensional errors caused by the processing technology, there may be dimensional differences between different battery cells 20 and the connecting fasteners 30. For example, the distance between the first limiting structure 32 and the first wall 21 of the fastener 30 may be different for different battery cells 20. When the second limiting structure 42 of the sampling component 40 is matched with the first limiting structure 32 of the fastener 30, the distance between the second limiting structure 42 and the first wall 21 can be dynamically adjusted through the floating structure 43 to adapt to different battery cells 20 and achieve floating installation. This also makes the sampling structure 41 of the sampling component 40 collect the state information of the battery cells 20 more accurately.

[0085] It should be understood that the connection between the floating structure 43 and the second limiting structure 42 in the embodiments of this application may include the floating structure 43 being directly connected to the second limiting structure 42, or the floating structure 43 being indirectly connected to the second limiting structure 42 through other components, so as to drive the second limiting structure 42 to move. The embodiments of this application are not limited to this.

[0086] In some embodiments, the floating structure 43 is connected to the sampling structure 41, and the floating structure 43 is also used to press at least a portion of the sampling structure 41 toward the first wall 21. While adjusting the position of the second limiting structure 42, the floating structure 43 can press at least a portion of the sampling structure 41, bringing that portion of the structure closer to the first wall 21 of the battery cell 20, thereby improving the accuracy of the state information collected by the sampling structure 41, improving measurement precision, and thus improving the reliability of the structure.

[0087] It should be understood that the floating structure 43 connecting the sampling structure 41 in the embodiments of this application may include the floating structure 43 being directly connected to a portion of the sampling structure 41 so as to directly squeeze that portion of the sampling structure 41; or the floating structure 43 being indirectly connected to the sampling structure 41 through other components so as to indirectly squeeze at least a portion of the sampling structure 41 by squeezing other components. The embodiments of this application are not limited to this.

[0088] It should be understood that the specific implementation of the floating structure 43 in this application embodiment can be set according to actual application. For example, the floating structure 43 may include a spring, and the floating structure 43 is achieved by the compression and restoration of the spring.

[0089] In some embodiments, the sampling member 40 includes a housing 44, the housing 44 being provided with a groove 441, and the floating structure 43 including a spring member; along the thickness direction of the first wall 21, one end of the spring member is fixedly connected to the bottom of the groove 441 near the first wall 21, and the other end of the spring member is fixedly connected to a second limiting structure 42, so that at least a portion of the second limiting structure 42 slides within the groove 441. Figures 6 to 9As shown, in order to allow at least a portion of the second limiting structure 42 to slide within the groove 441 of the outer casing 44, one end of the spring can be connected to the groove 441. For example, taking the thickness direction of the first wall 21 as the height direction Z of the battery cell 20, the lower end of the spring is connected to the edge of the groove 441 in the height direction Z of the battery cell 20. This edge is the bottom of the groove 441 near the first wall 21, so that the lower end of the spring is relatively fixed. The other end of the spring is connected to the second limiting structure 42. For example, the upper end of the spring is connected to the second limiting structure 42, so that the spring is clamped between the second limiting structure 42 and the bottom of the groove 441. Through the compression and recovery process of the spring, the second limiting structure 42 is driven to slide within the groove 441, thereby changing the position of the second limiting structure 42 to adjust the distance between the second limiting structure 42 and the sampling structure 41.

[0090] In some embodiments, the sampling structure 41 is fixed to the region of the housing 44 near the first wall 21; a spring is used to press the bottom of the groove 441 to press at least a portion of the sampling structure 41 toward the first wall 21. When the groove 441 is provided, the spring is directly connected to the bottom of the groove 441. In this case, the sampling structure 41 can be located in the region of the housing 44 near the first wall 21, so that when the spring is pressed, it indirectly presses at least a portion of the sampling structure 41 by pressing the bottom wall of the groove 441, making that portion closer to the first wall 21, thereby improving the sampling accuracy of the sampling structure 41. Furthermore, considering that the size of the sampling structure 41 is usually limited, the indirect pressing of the sampling structure 41 by the spring reduces the size occupied by the spring on the sampling structure 41, facilitating the installation of the sampling structure 41. In addition, the spring will deform during the compression and recovery process. Direct connection with the sampling structure 41 will cause the sampling structure 41 to be easily deformed, thus affecting its measurement accuracy. However, the outer shell 44 has relatively high structural strength and is not easily deformed by the spring. Therefore, even if the spring is deformed, the sampling structure 41 connected to it is not easily deformed, thereby improving the structural stability of the sampling structure 41 and thus improving the measurement accuracy.

[0091] In some embodiments, the housing 44 is provided with a plurality of grooves 441, and the second limiting structure 42 includes a connected main body portion 421 and a plurality of protrusions 422. At least a portion of the main body portion 421 is accommodated within the housing 44, and at least one protrusion 422 cooperates with the first limiting structure 32. The plurality of grooves 441 and the plurality of protrusions 422 correspond one-to-one, so that each protrusion 422 slides within the corresponding groove 441.

[0092] like Figures 6 to 9As shown, the outer casing 44 may have multiple sliding grooves; for example, this embodiment uses three sliding grooves 441. Furthermore, these multiple sliding grooves 441 may be located at different positions on the outer casing 44; for example, this embodiment uses three sliding grooves 441 located on different walls of the outer casing 44. Correspondingly, the second limiting structure 42 includes three protrusions 422 corresponding one-to-one with the three sliding grooves 441. The main body 421 of the second limiting structure 42 is housed inside the outer casing 44. The upper end of the spring member can be connected to the main body 421. Since the main body 421 is connected to the multiple protrusions 422, during the compression and recovery process of the spring member, the spring member can drive the main body 421 to move, and can also cause each protrusion 422 to move synchronously in its corresponding sliding groove 441 to adjust the distance between the second limiting structure 42 and the sampling structure 41. In addition, at least one of the plurality of protrusions 422 included in the second limiting structure 42 is used to cooperate with the first limiting structure 32. For example, in this embodiment, a protrusion 422 located in the middle cooperates with the first limiting structure 32, but this embodiment is not limited to this.

[0093] By using multiple sliding grooves 441 located at different positions on the outer casing 44, the position and balance of the second limiting structure 42 can be adjusted. When at least one protrusion 422 of the second limiting structure 42 cooperates with the first limiting structure 32, the other protrusions 422 can also move synchronously to maintain the balance and stability of the second limiting structure 42 and improve the stability between the cooperating protrusions 422 and the first limiting structure 32.

[0094] In some embodiments, the plurality of protrusions 422 protrude in different directions relative to the main body 421 to restrict the movement of the second limiting structure 42 from different directions. For example, as Figures 6 to 9 As shown, in this embodiment of the application, the outer shell 44 is provided with three sliding grooves 441 as an example. The three sliding grooves 441 can be located on different walls of the outer shell 44, so that the three protrusions 422 corresponding to the three sliding grooves 441 face three different directions. When the second limiting structure 42 moves, the protrusions 422 in the three directions move synchronously, so as to limit the protrusions 422 of the second limiting structure 42 from deviating from the corresponding sliding grooves 441.

[0095] In some embodiments, such as Figures 6 to 9As shown, the outer casing 44 also includes a through hole 443 through which at least a portion of the main body 421 passes. When the spring moves the main body 421, the size of the portion of the main body 421 passing through the through hole 443 can be changed. For example, the through hole 443 and the plurality of slides 441 can be located on different walls of the outer casing 44. For example, the wall where the through hole 443 is located can be connected to the wall where each slide 441 is located, so that the main body 421 can pass through the through hole 443.

[0096] Figure 10 A partial structural schematic diagram of the sampling component 40 according to an embodiment of this application is shown. Figure 10 A schematic diagram showing the sampler 40 not yet installed on the fastener 30 is shown; Figure 11 This illustration shows another partial structural diagram of the sampling component 40 according to an embodiment of this application. Figure 11 A schematic diagram is shown with the sampling component 40 installed after it has been attached to the fixing component 30.

[0097] like Figure 10 As shown, when not installed, the spring is in a restored state, that is, an uncompressed state. The protrusion 422 of the second limiting structure 42 is located near the top of the slide groove 441, and the main body 421 of the second limiting structure 42 extends out of the through hole 443 in a relatively large manner.

[0098] like Figure 11 As shown, after the sampling member 40 is installed inside the fixing member 30, at least one protrusion 422 of the second limiting structure 42 cooperates with the first limiting structure 32. For example, the at least one protrusion 422 is accommodated in the groove of the first limiting structure 32, so that the second limiting structure 42 compresses the spring member, the protrusion 422 of the second limiting structure 42 slides downward relative to the slide groove 441, the protrusion 422 is in a relatively lower position of the slide groove 441, and the part of the main body 421 of the second limiting structure 42 that protrudes from the through hole 443 will also become smaller.

[0099] In addition, combined Figures 6 to 9 As shown, after the spring is compressed, the end of the spring connected to the slide 441 will squeeze the edge of the slide 441, thereby indirectly squeezing the sampling structure 41 below, that is, squeezing the sampling structure 41 toward the first wall 21, so as to reduce the distance between the sampling structure 41 and the first wall 21, thereby improving the measurement accuracy of the sampling structure 41.

[0100] It should be understood that the specific implementation of the sampling structure 41 in this application embodiment can be set according to actual application. For example, the sampling structure 41 can be used to collect temperature to monitor the temperature change of the battery cell 20. As another example, the sampling structure 41 can also be used to collect voltage to monitor the voltage change of the battery cell 20.

[0101] In some embodiments, the sampling structure 41 includes a temperature sensor 411, which is used to collect the temperature of the battery cell 20. Based on the collected temperature of the battery cell 20, the temperature of the battery cell 20 is monitored to see if it is abnormal. For example, the temperature of the battery cell 20 can be monitored to see if it is too high or too low. When the temperature of the battery cell 20 is abnormal, it can be detected and dealt with in a timely manner, thereby improving the reliability of the battery device 10.

[0102] It should be understood that the specific implementation of the temperature sensor 411 in this application embodiment can be set according to actual application. For example, the temperature sensor 411 may include a negative temperature coefficient thermistor (NTC) for collecting the temperature of the battery cell 20, but this application embodiment is not limited to this. In addition, the NTC can be wrapped with adhesive to reduce the influence of the external environment on the NTC, such as moisture, dust, vibration, etc., so that the NTC can measure the temperature stably and accurately, and also to fix the NTC, reducing its displacement or damage during the operation of the battery device 10.

[0103] In some embodiments, the sampling structure 41 further includes a heat-conducting block 412 facing the first wall 21, and a temperature sensor 411 located on the side of the heat-conducting block 412 away from the first wall 21. The temperature sensor 411 is used to measure the temperature of the heat-conducting block 412. The heat-conducting block 412 can be used to transmit the temperature of the battery cell 20, so that when the temperature sensor 411 measures the temperature of the heat-conducting block 412, the temperature can be approximately the temperature of the battery cell 20. Additionally, under the compression of the floating structure 43, for example, if the floating structure 43 is a spring, the spring can be directly connected to the heat-conducting block 412, or, if the heat-conducting block 412 is connected to the outer casing 44, the spring can be indirectly connected to the heat-conducting block 412 through a groove 441, so that the heat-conducting block 412 is closer to the first wall 21, and the temperature of the heat-conducting block 412 measured by the temperature sensor 411 is closer to the temperature of the battery cell 20.

[0104] Considering that the surface of the first wall 21 of the battery cell 20 may be uneven, and that the battery cell 20 may expand and contract during use, the temperature sensor 411 may not adhere tightly enough or may even detach if it is in direct contact with the battery cell 20, thus affecting the accuracy of temperature measurement. Furthermore, the battery cell 20 may also have uneven temperature distribution in certain areas, which will also affect the measurement results of the temperature sensor 411. The heat-conducting block 412 solves these problems. The heat-conducting block 412 is relatively flat, which improves the contact stability between the temperature sensor 411 and the heat-conducting block 412, and also homogenizes local temperature fluctuations in the battery cell 20, thereby improving the measurement accuracy of the temperature sensor 411.

[0105] In some embodiments, the heat-conducting block 412 can be fixed relative to the housing 44. Since the structural strength of the housing 44 is relatively large, fixing the heat-conducting block 412 to the housing 44 can improve the stability of the heat-conducting block 412, thereby improving the temperature transfer efficiency and the measurement accuracy of the temperature sensor 411.

[0106] In some embodiments, the heat-conducting block 412 and the outer shell 44 are integrally formed to facilitate processing.

[0107] In some embodiments, the heat-conducting block 412 and the outer shell 44 can also be separate structures, but fixedly connected to each other. For example, the heat-conducting block 412 and the outer shell 44 can be fixed by adhesive or by connectors to suit different application scenarios, and the embodiments of this application are not limited thereto.

[0108] It should be understood that the specific implementation of the heat-conducting block 412 in this application embodiment can be set according to actual application. For example, the heat-conducting block 412 can be a metal block, and the outer shell 44 can be integrally injection molded with the heat-conducting block 412 to improve the structural stability of the heat-conducting block 412. As another example, the temperature sensor 411 can be fixed to the heat-conducting block 412 by adhesive, thereby providing sufficient holding force to maintain the accuracy of temperature acquisition and reduce the risk of instantaneous interruption.

[0109] In some embodiments, the sampling element 40 includes a housing 44 having a second opening 442 oriented in the same direction as the first opening 31. A portion of a temperature sensor 411 is housed within the housing 44, and another portion of the temperature sensor 411 extends out of the second opening 442 and the first opening 31. Figures 6 to 11As shown, the temperature sensor 411 in this embodiment can be a long strip structure, with one end located inside the housing 44 for measuring the temperature of the battery cell 20. For example, one end can be fixed to the heat-conducting block 412 and measure the temperature; while the other end extends out of the second opening 442 of the housing 44 of the sampling member 40, and also extends out of the first opening 31 of the fixing member 30, which is convenient for installation and also convenient for obtaining the temperature measured by the temperature sensor 411 through the extended end.

[0110] In some embodiments, the fixing member 30 further includes a third limiting structure 33, and the sampling member 40 further includes a fourth limiting structure 45. The fourth limiting structure 45 cooperates with the third limiting structure 33 to position the sampling member 40 between the first limiting structure 32 and the third limiting structure 33. Figures 6 to 11 As shown, the third limiting structure 33 and the first limiting structure 32 can be arranged opposite to each other, for example, they can be located on opposite sides of the first opening 31, so that the first limiting structure 32 and the second limiting structure 42 cooperate with each other, and the third limiting structure 33 cooperates with the fourth limiting structure 45, so that the sampling member 40 is restricted between the third limiting structure 33 and the first limiting structure 32, so as to stably fix the sampling member 40 in the cavity of the fixing member 30 and maintain the balance of the sampling member 40.

[0111] It should be understood that the specific implementation of the third limiting structure 33 and the fourth limiting structure 45 in the embodiments of this application can be set according to actual applications. For example, the third limiting structure 33 may include a protrusion, and the fourth limiting structure 45 may include a groove, such that at least a portion of the protrusion of the third limiting structure 33 is accommodated in the groove of the fourth limiting structure 45, so as to achieve mutual cooperation between the third limiting structure 33 and the fourth limiting structure 45. As another example, the third limiting structure 33 may also include a groove, and the fourth limiting structure 45 may include a protrusion, such that at least a portion of the protrusion of the fourth limiting structure 45 is accommodated in the groove of the third limiting structure 33, so as to achieve mutual cooperation between the third limiting structure 33 and the fourth limiting structure 45.

[0112] In some embodiments, such as Figures 6 to 11 As shown, the embodiments of this application mainly take the third limiting structure 33 including a protrusion as an example. Specifically, the third limiting structure 33 may include a limiting part 331, which may be a protrusion, and the protrusion is used to cooperate with the groove of the fourth limiting structure 45.

[0113] In some embodiments, the third limiting structure 33 may further include an elastic structure 332 connected to the limiting portion 331. The deformation of the elastic structure 332 facilitates the adjustment of the position of the limiting portion 331, thereby facilitating the mutual cooperation between the limiting portion 331 of the third limiting structure 33 and the fourth limiting structure 45.

[0114] It should be understood that the specific implementation of the elastic structure 332 can be set according to the actual application. For example, the elastic structure 332 can be a bent structure, which can be approximately U-shaped, and the position of the limiting part 331 can be adjusted by squeezing the bent structure.

[0115] Specifically, the elastic structure 332 includes a fixed segment 3321 and a bent segment 3322, the bent segment 3322 being used to connect the limiting portion 331 and the fixed segment 3321; along the arrangement direction of the first limiting structure 32 and the third limiting structure 33, there is a gap between the limiting portion 331 and the fixed segment 3321. For example, as Figures 6 to 11 As shown, taking the arrangement direction of the first limiting structure 32 and the third limiting structure 33 as the length direction X of the battery cell 20 as an example, there is a gap between the limiting part 331 connected by the bent section 3322 and the fixed section 3321 along the length direction X of the battery cell 20. In this way, when the limiting part 331 is pressed towards the fixed section 3321, the gap can be compressed to increase the distance between the limiting parts 331 of the first limiting structure 32 and the third limiting structure 33; when the limiting part 331 is no longer pressed towards the fixed section 3321, the gap can maintain the distance between the first limiting structure 32 and the limiting part 331.

[0116] In some embodiments, during installation, the sampling member 40 can be tilted to allow the first limiting structure 32 and the second limiting structure 42 to engage with each other, and the sampling member 40 can be gradually pressed into the cavity of the fixing member 30. Since the elastic structure 332 can adjust the position of the limiting part 331, during the process of the sampling member 40 being gradually accommodated into the cavity of the fixing member 30, the limiting part 331 is squeezed to reduce the gap between the limiting part 331 and the fixing section 3321, so that the limiting part 331 of the third limiting structure 33 can engage with the fourth limiting structure 45 to complete the installation of the sampling member 40.

[0117] Alternatively, during installation, the sampling component 40 can be tilted to allow the third limiting structure 33 and the fourth limiting structure 45 to engage with each other, and the sampling component 40 can be pressed into the cavity of the fixing component 30. Since the elastic structure 332 can adjust the position of the limiting part 331, as the sampling component 40 is gradually pressed into the cavity of the fixing component 30, the limiting part 331 is squeezed to reduce the gap between the limiting part 331 and the fixing section 3321, so that the first limiting structure 32 and the second limiting structure 42 can engage with each other to complete the installation of the sampling component 40.

[0118] In addition, after the installation of the sampling component 40 is completed, the force of the squeezing limiting part 331 is reduced compared to the installation process, and the gap between the limiting part 331 and the fixed section 3321 will increase relatively, so that the sampling component 40 can be more stably clamped between the first limiting structure 32 and the second limiting structure 42, thereby improving structural stability.

[0119] It should be understood that the sampling component 40 installed in the embodiments of this application can be used to collect the status information of the battery cell 20. The sampling component 40 can directly contact the battery cell 20, for example, it can directly contact the first wall 21 to collect the status information of the battery cell 20. Alternatively, it can indirectly collect the status information of the battery cell 20 by contacting other components.

[0120] In some embodiments, the sampling structure 41 contacts the first wall 21 and is used to measure the state information of the first wall 21. For example, such as Figures 6 to 11 As shown, the first wall 21 may include a sampling area 211. The sampling structure 41 of the sampling element 40 directly contacts the sampling area 211 to measure the state information of the sampling area 211 and determine the state information of the sampling area 211 as the state information of the battery cell 20. For example, the state information may include the temperature and / or voltage of the battery cell 20. Since the sampling structure 41 can directly contact the surface of the battery cell 20, the measurement accuracy of the sampling element 40 can be improved.

[0121] Figure 12 A side view schematic diagram of a partial structure of the battery device 10 according to an embodiment of this application is shown. For example, the... Figure 12 The diagram shows a side view of any two adjacent battery cells 20 in the battery device 10.

[0122] In some embodiments, the first wall 21 is provided with electrode terminals 22, and the battery device 10 further includes a busbar 121 for electrically connecting the electrode terminals 22 of a plurality of battery cells 20. A sampling structure 41 contacts the busbar 121 and is used to measure the state information of the busbar 121. Figure 12 As shown, the first wall 21 is provided with an electrode terminal 22, and the busbar 121 is connected to the side of the electrode terminal 22 away from the first wall 21. Then the sampling structure 41 of the sampling member 40 can be located on the side of the busbar 121 away from the first wall 21 and in direct contact with the busbar 121 to facilitate the measurement of the status information of the busbar 121. For example, the status information may include the temperature and / or voltage of the busbar 121.

[0123] Based on the state information of the busbar component 121, the state information of the battery cell 20 can be indirectly determined. For example, the measured temperature and / or voltage of the busbar component 121 can be correspondingly determined as the temperature and / or voltage of the battery cell 20. Since the busbar component 121 is electrically connected to the electrode terminals of the battery cell 20, the state information of the busbar component 121 can be considered similar to or the same as the state information of the battery cell 20, thus having a relatively small impact on the accuracy of actual monitoring of the state of the battery cell 20. Furthermore, due to the limited size of the first wall 21, indirectly determining the state information of the battery cell 20 by measuring the state information of other components can improve the design flexibility of the positions of the fixing member 30 and the sampling member 40. For example, the sampling structure 41 of the sampling member 40 does not necessarily need to be in direct contact with the first wall 21, making it easier to manufacture.

[0124] It should be understood that the battery cell 20 may be provided with at least one electrode terminal 22, which is used to electrically connect with the tab to output electrical energy. The electrode terminal 22 may be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal 22 may be provided at any position on the battery cell 20, and different electrode terminals 22 may be located on the same wall or different walls of the battery cell 20. In this embodiment, the sampling member 40 contacts the current collector 121, and the electrode terminal 22 electrically connected to the current collector 121 may be any one of the electrode terminals of the battery cell 20; this embodiment is not limited to this.

[0125] 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.

[0126] The electrical equipment can be any of the aforementioned devices or systems that utilize the battery device 10.

[0127] According to some embodiments of this application, see Figures 6 to 9 This application provides a battery device 10, including: a battery cell 20, including a first wall 21; a fixing member 30, fixed to the first wall 21, the fixing member 30 being a cavity structure with a first opening 31, the fixing member 30 including a first limiting structure 32; and a sampling member 40, including a sampling structure 41 and a second limiting structure 42, the second limiting structure 42 cooperating with the first limiting structure 32 to allow at least a portion of the sampling member 40 to be accommodated within the cavity of the fixing member 30, the sampling structure 41 being used to collect state information of the battery cell 20.

[0128] The sampling component 40 also includes a floating structure 43 connected to a second limiting structure 42. The floating structure 43 is used to adjust the distance between the second limiting structure 42 and the first wall 21. The floating structure 43 is connected to the sampling structure 41 and is also used to press at least a portion of the sampling structure 41 toward the first wall 21. The sampling component 40 includes a housing 44 with a groove 441. The floating structure 43 includes a spring. Along the thickness direction of the first wall 21, one end of the spring is fixedly connected to the bottom of the groove 441 near the first wall 21, and the other end of the spring is fixedly connected to the second limiting structure 42, so that at least a portion of the second limiting structure 42 slides within the groove 441.

[0129] The outer casing 44 is provided with a plurality of sliding grooves 441. The second limiting structure 42 includes a connected main body portion 421 and a plurality of protrusions 422. At least a portion of the main body portion 421 is accommodated within the outer casing 44. At least one protrusion 422 cooperates with the first limiting structure 32. The plurality of sliding grooves 441 and the plurality of protrusions 422 correspond one-to-one, so that each protrusion 422 slides within its corresponding sliding groove 441. The plurality of protrusions 422 protrude in different directions relative to the main body portion 421.

[0130] The sampling structure 41 includes a temperature sensor 411, which is used to collect the temperature of the battery cell 20. The sampling structure 41 also includes a heat-conducting block 412 facing the first wall 21. The temperature sensor 411 is located on the side of the heat-conducting block 412 away from the first wall 21, and is used to measure the temperature of the heat-conducting block 412. The sampling component 40 includes a housing 44 with a second opening 442 facing the same direction as the first opening 31. A portion of the temperature sensor 411 is housed within the housing 44, and another portion extends out of the second opening 442 and the first opening 31. The heat-conducting block 412 and the housing 44 are integrally formed.

[0131] The fixing member 30 also includes a third limiting structure 33, and the sampling member 40 also includes a fourth limiting structure 45. The fourth limiting structure 45 and the third limiting structure 33 cooperate with each other so that the sampling member 40 is located between the first limiting structure 32 and the third limiting structure 33.

[0132] 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 application relates to a battery cell (20) comprising a first wall (21); a fixing member (30) fixed with the first wall (21), the fixing member (30) being a cavity structure with a first opening (31), the fixing member (30) comprising a first limiting structure (32); a sampling member (40) comprising a sampling structure (41) and a second limiting structure (42), the second limiting structure (42) being matched with the first limiting structure (32) to enable at least part of the sampling member (40) to be accommodated in the cavity of the fixing member (30), the sampling structure (41) being used for collecting state information of the battery cell (20); the sampling member (40) further comprising a floating structure (43) connected with the second limiting structure (42), the floating structure (43) being used for adjusting the distance between the second limiting structure (42) and the first wall (21); the sampling member (40) comprising a shell (44) provided with a sliding groove (441), the floating structure (43) comprising a spring member, one end of the spring member being fixedly connected with the bottom of the sliding groove (441) close to the first wall (21) along the thickness direction of the first wall (21), the other end of the spring member being fixedly connected with the second limiting structure (42) to enable at least part of the second limiting structure (42) to slide in the sliding groove (441); the sampling structure (41) being fixed to the region of the shell (44) close to the first wall (21). The floating structure (43) is connected with the sampling structure (41), and the floating structure (43) is further used for extruding at least a partial region of the sampling structure (41) towards the first wall (21). The spring member is used for extruding the bottom of the sliding groove (441) to extrude at least a partial region of the sampling structure (41) towards the first wall (21). The shell (44) is provided with a plurality of sliding grooves (441), the second limiting structure (42) comprising a main body part (421) and a plurality of protruding parts (422) connected with each other, at least part of the main body part (421) being accommodated in the shell (44), at least one protruding part (422) being matched with the first limiting structure (32), the plurality of sliding grooves (441) and the plurality of protruding parts (422) corresponding to each other to enable each protruding part (422) to slide in the corresponding sliding groove (441). The plurality of protruding parts (422) protrude towards different directions relative to the main body part (421). The sampling structure (41) comprises a temperature sensor (411) used for collecting the temperature of the battery cell (20).

2. The battery device of claim 1, wherein ​ 3. The battery device of claim 1, wherein ​ 4. The battery device of claim 1, wherein ​ ​ 5. The battery device of claim 4, wherein, ​ 6. The battery device of claim 1, wherein ​ The sampling structure (41) further comprises a heat conduction block (412) facing the first wall (21), and the temperature sensor (411) is located on a side of the heat conduction block (412) away from the first wall (21) and is used to measure the temperature of the heat conduction block (412).

7. The battery device of claim 6, wherein The shell (44) has a second opening (442) with the same orientation as the first opening (31), and a part of the temperature sensor (411) is accommodated in the shell (44) and another part of the temperature sensor (411) extends out of the second opening (442) and the first opening (31).

8. The battery device of claim 6, wherein, The heat conduction block (412) and the shell (44) of the sampling piece (40) are an integral structure.

9. The battery device according to any one of claims 1 to 8, characterized by, The fixing piece (30) further comprises a third limiting structure (33), and the sampling piece (40) further comprises a fourth limiting structure (45), The fourth limiting structure (45) and the third limiting structure (33) are matched with each other to enable the sampling piece (40) to be located between the first limiting structure (32) and the third limiting structure (33).

10. The battery device of claim 9, wherein, The third limiting structure (33) comprises a limiting part (331) and an elastic structure (332) connected with each other, the limiting part (331) is used to match with the fourth limiting structure (45), The elastic structure (332) comprises a fixed segment (3321) and a bent segment (3322), the bent segment (3322) is used to connect the limiting part (331) and the fixed segment (3321), and the limiting part (331) and the fixed segment (3321) have a gap therebetween along the arrangement direction of the first limiting structure (32) and the third limiting structure (33).

11. The battery device according to any one of claims 1 to 8, characterized by, The battery device further comprises: A connecting assembly (12) provided with the fixing piece (30), a current collecting component (121) and a data acquisition component (122), the connecting assembly (12) is located on a side of the first wall (21) away from the inside of the battery monomer (20), the current collecting component (121) is used to electrically connect a plurality of battery monomers (20), and the data acquisition component (122) is used to acquire the voltage and / or current of the battery monomer (20).

12. An electrical device, characterized by The battery device comprises the battery device as claimed in any one of claims 1 to 11 and is used to supply power to the power consumption equipment.

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