Battery device and electric equipment

Abstract

The embodiment of the invention discloses a battery device and electric equipment. The battery device includes: a battery cell including a first wall; the fixing piece is fixed to the first wall, the fixing piece is of a cavity structure with a first opening, and the fixing piece comprises a first limiting structure; and the sampling piece comprises a sampling structure and a second limiting structure, the second limiting structure is matched with the first limiting structure, so that at least part of the sampling piece is accommodated in the cavity of the fixing piece, and the sampling structure is used for collecting state information of the single battery. According to the battery device and the electric equipment provided by the embodiment of the invention, the assembling efficiency and flexibility of the battery device can be improved.

Description

Technical Field

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

[0002] With the continuous advancement of battery technology, various new energy industries that use battery devices as energy storage devices have experienced rapid development. In addition to improving the performance of battery devices, how to improve the assembly flexibility and efficiency of battery devices is also a pressing issue to be addressed. Summary of the Invention

[0003] The embodiments of the present application provide a battery device and an electrical device, which 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; a sampling member including a sampling structure and a second limiting structure, the second limiting structure cooperating with the first limiting structure so that at least a portion of the sampling member is accommodated in the cavity of the fixing member, the sampling structure being used to collect status information of the battery cell.

[0005] Therefore, in the battery device of the embodiment of the present application, the fixing member and the battery cell are fixed to each other, and the sampling member can be installed in the cavity of the fixing member through the mutual cooperation between the first limiting structure and the second limiting structure, which facilitates the installation and removal of the sampling member and the fixing member. After multiple battery cells are assembled, the sampling member can be uniformly installed at the customer's site, making the assembly of the battery device more flexible and efficient. In addition, the sampling structure of the sampling member can collect the status information of the battery cell to monitor the status of the battery cell and promptly detect and handle any abnormality in the battery cell, thereby improving the reliability of the battery device.

[0006] In some embodiments, the sampling member further includes a floating structure connected to the second limiting structure, and the floating structure is used to adjust the distance between the second limiting structure and the first wall. Due to dimensional errors caused by the processing technology, there may be dimensional differences between different battery cells and the connected fixing parts. For example, the distance between the first limiting structure of the fixing part and the first wall may be different for different battery cells. Therefore, when the second limiting structure of the sampling member is matched with the first limiting structure of the fixing part, the floating structure can dynamically adjust the distance between the second limiting structure and the first wall to adapt to different battery cells, realize floating installation, and enable the sampling structure to collect battery cell status information more accurately.

[0007] In some embodiments, the floating structure is connected to the sampling structure and is further configured 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 closer to the first wall of the battery cell, thereby improving the accuracy of the state information collected by the sampling structure, enhancing measurement precision, and thereby enhancing the reliability of the structure.

[0008] In some embodiments, the sampling member includes a housing having a chute, and the floating structure includes a spring member. One end of the spring member is fixedly connected to the bottom of the chute 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 chute. The compression and recovery process of the spring member drives the second limiting structure to slide within the chute, thereby changing the position of the second limiting structure to adjust the distance between the second limiting structure and the sampling structure.

[0009] In some embodiments, the sampling structure is fixed to an area of ​​the housing near the first wall, and the spring member is used to squeeze the bottom of the chute to squeeze at least a portion of the sampling structure toward the first wall. Considering that the size of the sampling structure is usually limited, the spring member indirectly squeezes the sampling structure, which can reduce the size of the sampling structure occupied by the spring member, thereby facilitating the installation of the sampling structure. In addition, the spring member will deform during the compression and recovery process, and directly connecting it to the sampling structure will cause the sampling structure to be easily deformed, thereby affecting its measurement accuracy. However, the structural strength of the housing is relatively large and is not easily deformed by squeezing or stretching by the spring member. Therefore, in the case of spring deformation, the sampling structure to which it is connected is not easily deformed, thereby improving the structural stability of the sampling structure and thereby improving the measurement accuracy.

[0010] In some embodiments, the housing is provided with a plurality of such slide grooves, and the second limiting structure includes a main body portion and a plurality of protrusions connected to each other, at least a portion of the main body portion is accommodated in the housing, at least one of the protrusions cooperates with the first limiting structure, and the plurality of such slide grooves and the plurality of such protrusions correspond one to one, so that each of the protrusions slides in the corresponding slide groove. By providing a plurality of slide grooves located at different positions of the housing, the position and balance of the second limiting structure can be adjusted. When at least one protrusion included in 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, thereby improving 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 limit the movement of the second limiting structure from different directions.

[0012] In some embodiments, the sampling structure includes a temperature sensor for collecting the temperature of the battery cell. The sampling structure also includes a heat conductive block, the heat conductive block facing the first wall, and the temperature sensor located on a side of the heat conductive block away from the first wall, for measuring the temperature of the heat conductive block. Based on the collected battery cell temperature, the battery cell temperature is monitored for abnormalities. For example, the battery cell temperature can be monitored for excessively high or low temperatures. Abnormal battery cell temperatures can be detected and addressed promptly, 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, if the temperature sensor directly contacts the battery cell, the temperature sensor may not fit tightly enough or even fall off, thus affecting the accuracy of temperature measurement. Furthermore, the battery cell may also have localized temperature unevenness, which can also affect the temperature sensor's measurement results. The installation of this thermal block can solve these problems. The relatively flat thermal block can improve the contact stability between the temperature sensor and the block, and can also average out local temperature fluctuations in the battery cell, improving the temperature sensor's measurement accuracy.

[0014] In some embodiments, the sampling member includes a shell having a second opening, the second opening being oriented in the same direction as the first opening, a portion of the temperature sensor being accommodated in the shell, and another portion of the temperature sensor extending out of the second opening and the first opening, which facilitates both the installation of the temperature sensor through the second opening and the acquisition of the temperature measured by the temperature sensor through the extended end.

[0015] In some embodiments, the heat conducting block and the housing of the sampling member are integrally formed for ease of processing. Furthermore, since the housing has relatively high structural strength, the heat conducting block is fixed to the housing, which improves the stability of the heat conducting block, thereby increasing the temperature transfer efficiency and 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 in 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 is used to connect the limiting portion and the fixed section, and along the arrangement direction of the first limiting structure and the third limiting structure, there is a gap between the limiting portion and the fixed section. In this way, when the limiting portion is pressed toward the fixed section, the gap can be compressed to increase the distance between the first limiting structure and the limiting portion of the third limiting structure; when the limiting portion is no longer pressed toward the fixed section, the gap can maintain the distance between the first limiting structure and the limiting portion. The provision of the elastic structure can facilitate the mutual cooperation between the limiting portion and the fourth limiting structure to install the sampling component.

[0018] In some embodiments, the battery device further includes a connection assembly comprising the fixing member, a current collecting member, and a data acquisition member. The connection assembly is located on a side of the first wall away from the interior of the battery cell. The current collecting member is used to electrically connect the plurality of battery cells, and the data acquisition member is used to collect the voltage and / or current of the battery cells. The fixing member, current collecting member, and data acquisition member are integrated to improve processing and assembly efficiency.

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

[0020] In some embodiments, the electrical equipment is a vehicle, a ship, or a spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a vehicle according to an embodiment of the present application; Figure 2 A schematic diagram of a partial structure of a battery device according to an embodiment of the present application; Figure 3 For an embodiment of this application Figure 2 An enlarged schematic diagram of region A of the battery device is shown; Figure 4 This is an exploded schematic diagram of a partial structure of a battery device according to an embodiment of the present application; Figure 5 For an embodiment of this application Figure 4 An enlarged schematic diagram of region B of the battery device is shown; Figure 6 Another schematic diagram of a partial structure of a battery device according to an embodiment of the present application; Figure 7 This is a schematic diagram of the exploded structure of a partial structure of a battery device according to one embodiment of the present application; Figure 8A schematic cross-sectional view of a partial structure of a battery device according to an embodiment of the present application; Figure 9 This is a schematic diagram of the exploded structure of a sampling component according to one embodiment of the present application; Figure 10 This is a schematic diagram of the partial structure of a sampling component according to an embodiment of the present application; Figure 11 This is another partial structural diagram of a sampling member according to an embodiment of the present application; Figure 12 FIG1 is a schematic side view of a partial structure of a battery device according to an embodiment of the present application.

[0022] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0024] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0026] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0028] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0029] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0030] The term "multiple" used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two (including two) groups, and "multiple sheets" refers to more than two (including two) sheets.

[0031] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0032] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0033] In the development of battery technology, in order to improve the energy density of battery devices, a large number of battery cells are usually provided in the battery devices. In order to monitor and manage the status of these battery cells, a sampling component is usually provided in the battery device. For example, in order to collect the temperature of the battery cell, the sampling component may include a temperature sensor, and the temperature sensor may be pasted on the surface of the battery cell to monitor the temperature changes of the battery cell. Specifically, when assembling the battery device, the temperature sensor can be directly pasted and fixed on any surface of the battery cell, and then multiple battery cells and temperature sensors can be packaged together into a battery module and set in the box of the battery device. The entire process does not need to be completed on the client side. However, if it is necessary to install the temperature sensor at the customer's site for different application scenarios, how to design this installation method to make the battery device assembly more flexible is a problem that needs to be solved urgently.

[0034] Therefore, the embodiments of the present application provide a battery device and an electrical device that can solve the above-mentioned problems. The battery device of the embodiments of the present 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 the fixing member has 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 in the cavity of the fixing member so as to collect status information of the battery cell through the sampling structure. In this way, the fixing member and the battery cell are fixed to each other, and the sampling member can be installed in the cavity of the fixing member through the mutual cooperation between the first limiting structure and the second limiting structure, which facilitates the mutual installation and removal of the sampling member and the fixing member. After multiple battery cells are assembled, the sampling member can be uniformly installed at the customer's site, making the assembly of the battery device more flexible and efficient.

[0035] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0036] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0037] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0038] For example, Figure 1 As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 60, a controller 50 and a battery device 10 can be provided inside the vehicle 1. The controller 50 is used to control the battery device 10 to power the motor 60. For example, a battery device 10 can be provided at the bottom, front or rear of the vehicle 1. The battery device 10 can be used to power the vehicle 1. For example, the battery device 10 can be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery device 10 can not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0039] Figure 2 A schematic diagram showing a partial structure of a battery device 10 according to an embodiment of the present application; Figure 3 A partially enlarged schematic diagram of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 3 Can be Figure 2 The enlarged view of area A is shown. Figure 2 and Figure 3 As shown, the battery device 10 mentioned in the embodiment of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 20, and the multiple battery cells 20 are connected in series, parallel or mixed through a busbar component 121.

[0040] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 20 .

[0041] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 with a cable tie.

[0042] In some embodiments, the battery device 10 may be a battery pack, which includes a case 11 and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case 11 .

[0043] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 11 by fixing the battery module in the box body 11 .

[0044] As an example, the battery cell assembly may also be housed in the box body 11 by directly fixing the plurality of battery cells 20 to the box body 11 .

[0045] As an example, the housing 11 may include a first housing and a second housing. The first and second housings engage to form an enclosed space within the housing 11 for housing the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0046] As an example, the box body 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 a closed space is formed inside the box body 11 to accommodate the battery cell assembly.

[0047] In some embodiments, the box 11 can be used as a part of the chassis structure of the vehicle. For example, part of the box 11 can become at least a part of the bottom plate of the vehicle, or part of the box 11 can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0048] Figure 4 The exploded schematic diagram shows a partial structure of the battery device 10 according to an embodiment of the present application, for example, Figure 4 Shown as Figure 2 The exploded schematic diagram of the structure of the battery device 10 after the box 11 is removed; Figure 5 An enlarged schematic diagram of a partial structure of the battery device 10 according to an embodiment of the present application is shown, for example, Figure 5 Can be Figure 4 An enlarged view of area B is shown.

[0049] like Figure 4 and Figure 5 As shown, the battery device 10 of the embodiment of the present application may further include a connecting assembly 12 , wherein the connecting assembly 12 is located on a side of the first wall 21 of the battery cell 20 away from the interior of the battery cell 20 for easy installation.

[0050] In some embodiments, the connection assembly 12 may include a busbar 121 for electrically connecting the plurality of 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 connection, parallel connection, or a combination of series and parallel connection of the plurality of battery cells 20.

[0051] In some embodiments, the connection assembly 12 may further include a data acquisition component 122. The data acquisition component 122 may be used to monitor status information of the battery cells 20. For example, the status information may include at least one of the voltage, current, and / or temperature of the battery cells 20. Exemplarily, the data acquisition component 122 may include a wiring harness and acquisition terminals. The acquisition terminals may acquire status information of the battery cells 20. For example, the voltage of the battery cells 20 may be acquired. The acquired status information of the battery cells 20 is transmitted via the wiring harness. For example, the wiring harness may be connected to a battery management system (BMS) to facilitate the BMS to receive and process the status information, thereby improving the reliability of the battery device 10.

[0052] In some embodiments, the connection assembly 12 may integrate a busbar assembly 121 with a data acquisition unit 122. This facilitates direct attachment of the connection assembly 12 to the plurality of battery cells 20 during installation of the battery device 10, thereby improving processing and assembly efficiency. Specifically, the connection assembly 12 may include a separator plate to which the busbar assembly 121 is attached. For example, the busbar assembly 121 may be integrally formed with the separator plate by injection molding or other methods. The wiring harness and acquisition terminals included in the data acquisition unit 122 may be mounted and fixed to the separator plate, allowing the busbar assembly 121 and the data acquisition unit 122 to be integrated.

[0053] 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 diagram of a battery device 10 according to an embodiment of the present application is shown, for example, Figure 6 Shown as Figure 2 Any one battery cell 20 in the battery device 10 is shown, and the battery cell 20 is connected to a fixing member 30 and a sampling member 40 . Figure 7 The schematic diagram of the exploded structure of the partial structure of the battery device 10 according to the embodiment of the present application is shown. Figure 7 Can be Figure 6 An exploded schematic diagram of the structure shown; Figure 8 The schematic cross-sectional view shows a partial structure of the battery device 10 according to an embodiment of the present application. Figure 8 Can be Figure 6 The cross-sectional view of the structure shown is perpendicular to the thickness direction Y of the battery cell 20 .

[0054] In the embodiments of this application, Figures 2 to 8As shown, the battery cell 20 includes a first wall 21; the 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 cooperates with the first limiting structure 32 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 status information of the battery cell 20.

[0055] The battery cell 20 of the embodiment of the present application can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in the present application.

[0056] like Figures 2 to 8 As shown, for the sake of convenience of explanation, the embodiment of the present application takes a rectangular battery cell 20 as an example, and defines three directions based on the rectangular 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, wherein 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 the thickness direction Y.

[0057] In some embodiments, as Figures 2 to 8 As shown, the battery cell 20 may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, in a non-sealed structure, the outer shell protects the electrode assembly and includes a sealing bag between the outer shell and the electrode assembly, which encapsulates the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. In a sealed structure, the outer shell encapsulates the electrode assembly, electrolyte, and other components.

[0058] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0059] In some embodiments, for battery cells 20 of different shapes, their housings may include different numbers of walls. For example, a rectangular battery cell 20 may include six walls, and the first wall 21 in the embodiment of the present application is any one of the walls of the battery cell 20 .

[0060] The fixing member 30 of the embodiment of the present application is fixed to the first wall 21. For example, the fixing member 30 and the first wall 21 can be fixed by any method according to practical application. For example, the fixing member 30 and the first wall 21 can be fixed by gluing, but the embodiment of the present application is not limited to this.

[0061] The fixing member 30 of the embodiment of the present application is a cavity structure having 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, and the second limiting structure 42 can cooperate with the first limiting structure 32. For example, Figures 2 to 8 As shown, the first limiting structure 32 may include a groove portion, 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 and may include at least a portion of the protrusion 422 being accommodated in the groove portion, so that the first limiting structure 32 and the second limiting structure 42 can restrict each other, thereby achieving relative fixation between the sampling member 40 and the fixing member 30. Alternatively, conversely, the first limiting structure 32 includes a protrusion, and the second limiting structure 42 includes a groove. The first limiting structure 32 and the second limiting structure 42 cooperate with each other and 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 restrict each other. The embodiments of the present application are not limited to this.

[0062] In some embodiments, the battery device 10 may include one or more fixing members 30. When multiple fixing members 30 are included, each of the multiple fixing members 30 may be used to fix a sampling member 40, so that the status information of multiple battery cells 20 can be collected through the multiple sampling members 40 fixed by the multiple fixing members 30. For example, the multiple fixing members 30 may be independent structures, or the multiple fixing members 30 may be integrated.

[0063] For example, Figure 4 and Figure 5 As shown, the connection component 12 is provided with a fixing part 30, a confluence component 121 and a data acquisition component 122, that is, the battery device 10 can integrate multiple fixing parts 30 through the connection component 12. For example, multiple fixing parts 30, the confluence component 121 and the data acquisition component 122 can be integrated to improve processing and assembly efficiency. Specifically, the multiple fixing parts 30 can be integrally formed with the isolation plate of the connection component 12 to facilitate processing. In this way, by fixing the connection component 12 to the side of the first wall 21 away from the interior of the battery cell 20, the installation of multiple fixing parts 30, the confluence component 121 and the data acquisition component 122 can be completed, which can improve processing and assembly efficiency.

[0064] For another example, the multiple fixing parts 30 included in the battery device 10 can also be set separately from the convergence component 121 and the data acquisition component 122. For example, the multiple fixing parts 30 included in the battery device 10 are a split structure, and the multiple fixing parts 30 and the connecting component 12 can also be set separately, so as to flexibly adjust the position and structure of each fixing part 30 for application in different application scenarios.

[0065] It should be understood that in the case where multiple fixing members 30, confluence members 121 and data acquisition members 122 are integrated, the present application implements the following example. Figures 6 to 8 The fixing member 30 shown may be a schematic diagram of a local structure of the connecting assembly 12; or, in the case where multiple fixing members 30 are separately provided, the embodiment of the present application may be as follows: Figures 6 to 8 The fixing member 30 shown may be a structural diagram of any fixing member 30 , and the embodiments of the present application are not limited thereto.

[0066] When assembling the battery device 10, at least some of the battery cells 20 in 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 members 30 to which the battery cells 20 are connected. Figures 2 to 5 As shown, only some of the battery cells 20 in the battery device 10 may be provided with fixing members 30. Figure 2 For example, if five battery cells 20 are equipped with fixing members 30, the sampling member 40 can be installed on these battery cells 20 to facilitate monitoring of these battery cells 20. For another example, the housing 11 of the battery device 10 can be provided with a third opening 111, which can expose the first opening 31 of the fixing member 30. In this way, the battery device 10 can be packaged first without installing the sampling member 40.

[0067] like Figures 6 to 8 As shown, for a battery cell 20 provided with a fixing member 30, the 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 being located in the cavity of the fixing member 30 as an example, the sampling member 40 can be tilted so that the sampling member 40 gradually enters the internal 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 in 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.

[0068] The sampling structure 41 of the sampling component 40 can collect status information of the battery cells 20. For example, the status information may include at least one of the voltage, current, and temperature information of the battery cells 20. By collecting the status information of the battery device 10, the status of the battery cells 20 of the battery device 10 can be monitored, and when the battery cells 20 are abnormal, they can be discovered and handled in a timely manner, thereby improving the reliability of the battery device 10. Exemplarily, the status information of the battery cells 20 collected by the sampling component 40 is generally different from the status information of the battery cells 20 collected by the data acquisition component 122, so as to monitor different status information of the battery cells 20 respectively. For example, the sampling component 40 can be used to collect the temperature of the battery cells 20, while the data acquisition component 122 is used to collect the voltage or current of the battery cells 20, but the embodiments of the present application are not limited to this.

[0069] In addition, this installation method of the sampling piece 40 allows the sampling piece 40 to be uniformly installed at the customer's location after the multiple battery cells 20 of the battery device 10 are assembled, and the sampling piece 40 and the fixing piece 30 can be installed and disassembled with each other, which makes the assembly of the battery device more flexible and efficient, and facilitates the battery device 10 to be suitable for different application scenarios to meet customer needs.

[0070] The sampling member 40 and the fixing member 30 according to the embodiment of the present application will be described below with reference to the accompanying drawings.

[0071] Figure 9 The schematic diagram of the decomposition structure of the sampling member 40 of the embodiment of the present application is shown. Figure 9 Can be as Figures 6 to 8 The schematic diagram of the exploded structure of the sampling component 40 is shown.

[0072] In some embodiments, the sampling member 40 further includes a floating structure 43, the floating structure 43 is connected to the second limiting structure 42, and the floating structure 43 is 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 then adjust the distance between the second limiting structure 42 and the first wall 21.

[0073] Since the processing technology may cause dimensional errors, there may be dimensional differences between different battery cells 20 and the connected fixing parts 30. For example, for different battery cells 20, the distance between the first limiting structure 32 of the fixing part 30 and the first wall 21 may be different. Then, when the second limiting structure 42 of the sampling part 40 is matched with the first limiting structure 32 of the fixing part 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 realize floating installation. It can also enable the sampling structure 41 of the sampling part 40 to collect status information of the battery cell 20 more accurately.

[0074] It should be understood that the floating structure 43 in the embodiment of the present application is connected to the second limiting structure 42, which 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 to drive the second limiting structure 42 to move. The embodiment of the present application is not limited to this.

[0075] In some embodiments, 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. While adjusting the position of the second limiting structure 42, the floating structure 43 can also press at least a portion of the sampling structure 41, bringing it closer to the first wall 21 of the battery cell 20. This improves the accuracy of the state information collected by the sampling structure 41, improves measurement precision, and thereby enhances the reliability of the structure.

[0076] It should be understood that the connection between the floating structure 43 and the sampling structure 41 in the embodiment of the present application may include the floating structure 43 being directly connected to a partial area of ​​the sampling structure 41 so that it directly squeezes the partial area 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 partial area of ​​the sampling structure 41 by squeezing the other components. The embodiment of the present application is not limited to this.

[0077] It should be understood that the specific implementation of the floating structure 43 of the embodiment of the present application can be set according to actual application. For example, the floating structure 43 can include a spring member, and the floating structure 43 is floated by the compression and recovery of the spring member.

[0078] In some embodiments, the sampling member 40 includes a housing 44, which is provided with a slide groove 441. The floating structure 43 includes 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 slide groove 441 near the first wall 21, and the other end of the spring member is fixedly connected to the second limiting structure 42, so that at least a portion of the second limiting structure 42 slides in the slide groove 441. Figures 6 to 9As shown, in order to enable at least a portion of the second limiting structure 42 to slide in the slide groove 441 of the housing 44, one end of the spring member can be connected to the slide groove 441. For example, taking the thickness direction of the first wall 21 as the height direction Z of the battery cell 20, then in the height direction Z of the battery cell 20, the lower end of the spring member is connected to the edge of the slide groove 441, which is the bottom of the slide groove 441 close to the first wall 21, so that the lower end of the spring member is relatively fixed; the other end of the spring member is connected to the second limiting structure 42, for example, the upper end of the spring member is connected to the second limiting structure 42, so that the spring member is clamped between the second limiting structure 42 and the bottom of the slide groove 441, and the second limiting structure 42 is driven to slide in the slide groove 441 through the compression and recovery process of the spring member, 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.

[0079] In some embodiments, the sampling structure 41 is fixed to an area of ​​the housing 44 near the first wall 21; the spring member is used to press the bottom of the chute 441 to press at least a portion of the sampling structure 41 toward the first wall 21. When the chute 441 is provided, the spring member is directly connected to the bottom of the chute 441. In this case, the sampling structure 41 can be located in the area of ​​the housing 44 near the first wall 21, so that when the spring member is pressed, the spring member presses the bottom wall of the chute 441, thereby indirectly pressing at least a portion of the sampling structure 41, bringing the 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 generally limited, the indirect pressing of the sampling structure 41 by the spring member can reduce the size of the sampling structure 41 occupied by the spring member, thereby facilitating the installation of the sampling structure 41. In addition, the spring part 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, thereby affecting its measurement accuracy. However, the structural strength of the shell 44 is relatively large and is not easily deformed by being squeezed or stretched by the spring part. Therefore, when the spring is deformed, the sampling structure 41 to which it is connected is not easily deformed, thereby improving the structural stability of the sampling structure 41 and thereby improving the measurement accuracy.

[0080] In some embodiments, the shell 44 is provided with a plurality of slide grooves 441, the second limiting structure 42 includes a connected main body 421 and a plurality of protrusions 422, at least part of the main body 421 is accommodated in the shell 44, at least one protrusion 422 cooperates with the first limiting structure 32, and the plurality of slide grooves 441 and the plurality of protrusions 422 correspond one to one, so that each protrusion 422 slides in the corresponding slide groove 441.

[0081] like Figures 6 to 9As shown, the housing 44 can have multiple slide grooves. For example, the embodiment of the present application takes three slide grooves 441 as an example. Moreover, the multiple slide grooves 441 can be located at different positions of the housing 44. For example, the embodiment of the present application takes the three slide grooves 441 as an example. Correspondingly, the second limiting structure 42 includes three protrusions 422 corresponding to the three slide grooves 441. The main body 421 of the second limiting structure 42 is accommodated inside the housing 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, the spring member can drive the main body 421 to move during the compression and recovery process of the spring member, and can also cause each protrusion 422 to move synchronously in the corresponding slide groove 441 to adjust the distance between the second limiting structure 42 and the sampling structure 41. In addition, at least one of the multiple protrusions 422 included in the second limiting structure 42 is used to cooperate with the first limiting structure 32. For example, in the embodiment of the present application, a protrusion 422 located in the middle cooperates with the first limiting structure 32, but the embodiment of the present application is not limited to this.

[0082] By setting multiple slide grooves 441 at different positions of the shell 44, the position and balance of the second limiting structure 42 can be adjusted. When at least one protrusion 422 included in the second limiting structure 42 cooperates with the first limiting structure 32, the remaining 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.

[0083] In some embodiments, the plurality of protrusions 422 protrude in different directions relative to the main body 421 to limit the movement of the second limiting structure 42 from different directions. Figures 6 to 9 As shown, in the embodiment of the present application, an outer shell 44 is provided with three slide grooves 441 as an example. The three slide grooves 441 can be respectively located on different walls of the outer shell 44, so that the three protrusions 422 corresponding to the three slide grooves 441 face three different directions, so that when the second limiting structure 42 moves, the protrusions 422 in the three directions move synchronously to limit the protrusions 422 of the second limiting structure 42 from deviating from the corresponding slide grooves 441.

[0084] In some embodiments, as Figures 6 to 9As shown, the housing 44 further includes a through hole 443, through which at least a portion of the main body 421 passes. When the spring member drives the main body 421 to move, 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 slide slots 441 can be located on different walls of the housing 44. For example, the wall where the through hole 443 is located can be connected to the walls where each slide slot 441 is located, so that the main body 421 can pass through the through hole 443.

[0085] Figure 10 The schematic diagram of the partial structure of the sampling member 40 of the embodiment of the present application is shown. Figure 10 A schematic diagram showing a situation where the sampling member 40 has not yet been mounted on the fixing member 30; Figure 11 Another partial structural diagram of the sampling member 40 according to the embodiment of the present application is shown. Figure 11 FIG. 1 is a schematic diagram showing a state where the sampling member 40 is mounted on the fixing member 30 .

[0086] like Figure 10 As shown, when not installed, the spring member 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 to a larger extent.

[0087] like Figure 11 As shown, after the sampling member 40 is installed inside the fixing member 30, the at least one protrusion 422 included in 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 included in the first limiting structure 32, so that the second limiting structure 42 compresses the spring member, and 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 extending out of the through hole 443 will also become smaller.

[0088] In addition, combined Figures 6 to 9 As shown, after the spring member is compressed, the end of the spring member connected to the slide groove 441 will squeeze the edge of the slide groove 441, and then indirectly squeeze the sampling structure 41 below, that is, squeeze 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.

[0089] It should be understood that the specific implementation of the sampling structure 41 of the embodiment of the present application can be configured according to the actual application. For example, the sampling structure 41 can be used to collect temperature to monitor the temperature changes of the battery cell 20. For another example, the sampling structure 41 can also be used to collect voltage to monitor the voltage changes of the battery cell 20.

[0090] 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 whether it is abnormal. For example, the temperature of the battery cell 20 can be monitored to see whether it is too high or too low, and abnormal temperature of the battery cell 20 can be discovered and handled in a timely manner, thereby improving the reliability of the battery device 10.

[0091] It should be understood that the specific implementation of the temperature sensor 411 in the embodiments of the present application can be configured based on actual applications. For example, the temperature sensor 411 may include a negative temperature coefficient thermistor (NTC) to collect the temperature of the battery cell 20, but the embodiments of the present application are not limited to this. Furthermore, the NTC can be encapsulated with adhesive to reduce its sensitivity to external environmental influences, such as moisture, dust, and vibration, enabling it to measure temperature stably and accurately. This also serves to stabilize the NTC, preventing it from shifting or being damaged during operation of the battery device 10.

[0092] In some embodiments, the sampling structure 41 further includes a heat conductive block 412, which faces the first wall 21. A temperature sensor 411 is located on a side of the heat conductive block 412 away from the first wall 21. The temperature sensor 411 is configured to measure the temperature of the heat conductive block 412. The heat conductive block 412 can be configured to transmit the temperature of the battery cell 20, such that when the temperature sensor 411 measures the temperature of the heat conductive block 412, the temperature can be approximately the temperature of the battery cell 20. Furthermore, under the compressive action of the floating structure 43, for example, if the floating structure 43 is a spring member, the spring member can be directly connected to the heat conductive block 412. Alternatively, if the heat conductive block 412 is connected to the housing 44, the spring member can be indirectly connected to the heat conductive block 412 via a slot 441, thereby bringing the heat conductive block 412 closer to the first wall 21 and causing the temperature of the heat conductive block 412 measured by the temperature sensor 411 to be closer to the temperature of the battery cell 20.

[0093] 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, if the temperature sensor 411 directly contacts the battery cell 20, the temperature sensor 411 may not fit tightly enough or even fall off, thereby affecting the accuracy of temperature measurement. In addition, the battery cell 20 may also have uneven temperatures in local areas, which will also affect the measurement results of the temperature sensor 411. The provision of the heat conductive block 412 can solve the above problems. The heat conductive block 412 is relatively flat, which can improve the contact stability between the temperature sensor 411 and the heat conductive block 412, and can also average out local temperature fluctuations in the battery cell 20, thereby improving the measurement accuracy of the temperature sensor 411.

[0094] In some embodiments, the heat conductive block 412 can be fixed relative to the outer shell 44. Since the structural strength of the outer shell 44 is relatively large, the heat conductive block 412 is fixed to the outer shell 44, which can improve the stability of the heat conductive block 412, thereby improving the temperature transfer efficiency and improving the measurement accuracy of the temperature sensor 411.

[0095] In some embodiments, the heat conducting block 412 and the housing 44 are integrally formed to facilitate processing.

[0096] In some embodiments, the heat conducting block 412 and the housing 44 may also be separate structures and fixedly connected to each other. For example, the heat conducting block 412 and the housing 44 may be fixed by adhesive or fixed by connectors to suit different application scenarios, but the embodiments of the present application are not limited thereto.

[0097] It should be understood that the specific implementation of the heat conducting block 412 in the embodiment of the present application can be configured according to the actual application. For example, the heat conducting block 412 can be a metal block, and the housing 44 can be integrally injection molded with the heat conducting block 412 to improve the structural stability of the heat conducting block 412. For another example, the temperature sensor 411 can be fixed to the heat conducting block 412 using adhesive, thereby providing sufficient holding force to maintain the accuracy of temperature acquisition and reduce the risk of transient interruptions.

[0098] In some embodiments, the sampling member 40 includes a housing 44 having a second opening 442. The second opening 442 is oriented in the same direction as the first opening 31. A portion of the temperature sensor 411 is accommodated in 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 of the embodiment of the present application can be a long strip structure, one end of which is located in the shell 44 to measure the temperature of the battery cell 20. For example, one end of the temperature sensor 411 can be fixed to the heat conductive block 412 and measure the temperature; while the other end extends out of the second opening 442 of the shell 44 of the sampling component 40, and also extends out of the first opening 31 of the fixing component 30, which is convenient for installation and for obtaining the temperature measured by the temperature sensor 411 through the extended end.

[0099] 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 relative to each other, for example, 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 and the fourth limiting structure 45 cooperate with each other, so that the sampling piece 40 is restricted between the third limiting structure 33 and the first limiting structure 32, so as to stably fix the sampling piece 40 in the cavity of the fixing piece 30 and maintain the balance of the sampling piece 40.

[0100] It should be understood that the specific implementation of the third limiting structure 33 and the fourth limiting structure 45 of the embodiment of the present application can be set according to actual application. For example, the third limiting structure 33 may include a protrusion and the fourth limiting structure 45 may include a groove, so 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, thereby achieving mutual cooperation between the third limiting structure 33 and the fourth limiting structure 45. For another example, the third limiting structure 33 may also include a groove and the fourth limiting structure 45 may include a protrusion, so 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, thereby achieving mutual cooperation between the third limiting structure 33 and the fourth limiting structure 45.

[0101] In some embodiments, as Figures 6 to 11 As shown, the embodiment of the present application mainly takes the third limiting structure 33 including a protrusion as an example. Specifically, the third limiting structure 33 may include a limiting portion 331, which may be a protrusion for cooperating with the groove of the fourth limiting structure 45.

[0102] In some embodiments, the third limiting structure 33 may also include an elastic structure 332 connected to the limiting portion 331. The elastic structure 332 can be deformed to adjust 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.

[0103] It should be understood that the specific implementation of the elastic structure 332 can be set according to actual application. For example, the elastic structure 332 can be a bent structure, which can be approximately U-shaped, and the position of the limit portion 331 can be adjusted by squeezing the bent structure.

[0104] Specifically, the elastic structure 332 includes a fixed section 3321 and a bent section 3322, and the bent section 3322 is used to connect the limiting portion 331 and the fixed section 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 section 3321. For example, Figures 6 to 11 As shown, taking the arrangement direction of the first limiting structure 32 and the third limiting structure 33 as the longitudinal direction X of the battery cell 20 as an example, a gap exists between the limiting portion 331 connected by the bent segment 3322 and the fixed segment 3321 along the longitudinal direction X of the battery cell 20. Thus, when the limiting portion 331 is pressed toward the fixed segment 3321, the gap can be compressed to increase the distance between the first limiting structure 32 and the limiting portion 331 of the third limiting structure 33. However, when the limiting portion 331 is no longer pressed toward the fixed segment 3321, the gap can maintain the distance between the first limiting structure 32 and the limiting portion 331.

[0105] In some embodiments, during installation, the sampling piece 40 can be tilted to first cooperate with the first limiting structure 32 and the second limiting structure 42, and the sampling piece 40 can be gradually pressed into the cavity of the fixing piece 30. Since the elastic structure 332 can adjust the position of the limiting portion 331, in the process of the sampling piece 40 being gradually accommodated in the cavity of the fixing piece 30, the limiting portion 331 is squeezed to reduce the size of the gap between the limiting portion 331 and the fixing section 3321, so that the limiting portion 331 of the third limiting structure 33 and the fourth limiting structure 45 can cooperate with each other, thereby completing the installation of the sampling piece 40.

[0106] Alternatively, during installation, the sampling piece 40 can be tilted to first cooperate with the third limiting structure 33 and the fourth limiting structure 45, and then the sampling piece 40 can be pressed into the cavity of the fixing piece 30; wherein, since the elastic structure 332 can adjust the position of the limiting portion 331, the sampling piece 40 is gradually pressed into the cavity of the fixing piece 30, and the limiting portion 331 is squeezed to reduce the size of the gap between the limiting portion 331 and the fixing section 3321, so that the first limiting structure 32 and the second limiting structure 42 can cooperate with each other, and the installation of the sampling piece 40 is completed.

[0107] In addition, after the installation of the sampling piece 40 is completed, the force of squeezing the limiting portion 331 becomes smaller than that during the installation process, and the gap between the limiting portion 331 and the fixed section 3321 will be relatively increased, so that the sampling piece 40 can be more stably clamped between the first limiting structure 32 and the second limiting structure 42 to improve structural stability.

[0108] It should be understood that the sampling piece 40 installed in the embodiment of the present application can be used to collect status information of the battery cell 20, wherein the sampling piece 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, or it can also indirectly collect the status information of the battery cell 20 by contacting other components.

[0109] In some embodiments, the sampling structure 41 is in contact with the first wall 21 and is used to measure the state information of the first wall 21. For example, Figures 6 to 11 As shown, the first wall 21 may include a sampling area 211. The sampling structure 41 of the sampling member 40 directly contacts the sampling area 211 to measure status information of the sampling area 211 and determine the status information of the sampling area 211 as the status information of the battery cell 20. For example, the status 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 member 40 can be improved.

[0110] Figure 12 A schematic side view of a partial structure of a battery device 10 according to an embodiment of the present application is shown. Figure 12 A schematic side view of any two adjacent battery cells 20 in the battery device 10 is shown.

[0111] In some embodiments, the first wall 21 is provided with an electrode terminal 22, and the battery device 10 further includes a busbar 121, which is used to electrically connect the electrode terminals 22 of the plurality of battery cells 20, and the sampling structure 41 is in contact with the busbar 121 and is used to measure the status information of the busbar 121. Figure 12 As shown, the first wall 21 is provided with an electrode terminal 22, and the busbar component 121 is connected to the side of the electrode terminal 22 away from the first wall 21. The sampling structure 41 of the sampling member 40 can be located on the side of the busbar component 121 away from the first wall 21 and in direct contact with the busbar component 121 to facilitate measuring status information of the busbar component 121. For example, the status information may include the temperature and / or voltage of the busbar component 121.

[0112] Based on the status information of the busbar component 121, the status 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 status information of the busbar component 121 can be regarded as similar to or the same as the status information of the battery cell 20, which has little effect on the accuracy of actual monitoring of the status of the battery cell 20. In addition, due to the limited size of the first wall 21, by measuring the status information of other components to indirectly determine the status information of the battery cell 20, the design flexibility of the position of the fixing member 30 and the sampling member 40 can be improved. For example, the sampling structure 41 of the sampling member 40 does not need to be in direct contact with the first wall 21, which is more convenient for processing.

[0113] It should be understood that the battery cell 20 can be provided with at least one electrode terminal 22, which is used to electrically connect to the tab to output electrical energy. The electrode terminal 22 can be directly connected to the tab or indirectly connected to the tab through a current collecting member. The electrode terminal 22 can be provided at any position of the battery cell 20, and different electrode terminals 22 can be located on the same wall or different walls of the battery cell 20. The sampling piece 40 of the embodiment of the present application is in contact with the current collecting member 121, and the electrode terminal 22 electrically connected to the current collecting member 121 can be any electrode terminal of the battery cell 20, and the embodiment of the present application is not limited to this.

[0114] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery device 10 described in any of the above schemes, and the battery device 10 is used to provide electrical energy to the electrical device.

[0115] The power-consuming device may be any of the aforementioned devices or systems using the battery device 10 .

[0116] According to some embodiments of the present application, see Figures 6 to 9 The present application provides a battery device 10, comprising: 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 having a first opening 31, the fixing member 30 including 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 cooperates with the first limiting structure 32 so that at least a portion of the sampling member 40 is accommodated in the cavity of the fixing member 30, and the sampling structure 41 is used to collect status information of the battery cell 20.

[0117] The sampling member 40 also includes a floating structure 43, which is connected to the second limiting structure 42 and 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 member 40 includes a housing 44, which is provided with a slide 441. The floating structure 43 includes 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 slide 441 near the first wall 21, and the other end of the spring member is fixedly connected to the second limiting structure 42, so that at least a portion of the second limiting structure 42 slides within the slide 441.

[0118] The housing 44 is provided with a plurality of slide grooves 441. The second limiting structure 42 includes a main body 421 and a plurality of protrusions 422 connected to each other. At least a portion of the main body 421 is accommodated in the housing 44. At least one protrusion 422 cooperates with the first limiting structure 32. The multiple slide grooves 441 and the multiple protrusions 422 correspond one-to-one, so that each protrusion 422 slides within the corresponding slide groove 441. The multiple protrusions 422 protrude in different directions relative to the main body 421.

[0119] The sampling structure 41 includes a temperature sensor 411 for collecting the temperature of the battery cell 20. The sampling structure 41 also includes a heat conductive block 412, which faces the first wall 21. The temperature sensor 411 is located on a side of the heat conductive block 412 away from the first wall 21 and is used to measure the temperature of the heat conductive block 412. The sampling member 40 includes a housing 44 having a second opening 442, which is oriented in the same direction as the first opening 31. A portion of the temperature sensor 411 is housed within the housing 44, while another portion of the temperature sensor 411 extends out of the second opening 442 and the first opening 31. The heat conductive block 412 and the housing 44 are integrally formed.

[0120] 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 .

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A battery cell (20) comprising a first wall (21); A fixing member (30) is fixed to the first wall (21), the fixing member (30) is a cavity structure having a first opening (31), and the fixing member (30) includes a first limiting structure (32); The sampling member (40) comprises a sampling structure (41) and a second limiting structure (42), wherein the second limiting structure (42) cooperates with the first limiting structure (32) to accommodate at least a portion of the sampling member (40) in the cavity of the fixing member (30), and the sampling structure (41) is used to collect status information of the battery cell (20).

2. The battery device according to claim 1, wherein: The sampling member (40) further comprises a floating structure (43), wherein the floating structure (43) is connected to the second limiting structure (42), and the floating structure (43) is used to adjust the distance between the second limiting structure (42) and the first wall (21).

3. The battery device according to claim 2, characterized in that The floating structure (43) is connected to the sampling structure (41), and the floating structure (43) is also used to press at least a partial area of ​​the sampling structure (41) toward the first wall (21).

4. The battery device according to claim 2, wherein: The sampling member (40) includes a housing (44), the housing (44) is provided with a slide groove (441), and the floating structure (43) includes 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 slide groove (441) close to the first wall (21), and the other end of the spring member is fixedly connected to the second limiting structure (42) so that at least a portion of the second limiting structure (42) slides in the slide groove (441).

5. The battery device according to claim 4, characterized in that The sampling structure (41) is fixed to a region of the housing (44) close to the first wall (21), The spring member is used to press the bottom of the slide groove (441) to press at least a partial area of ​​the sampling structure (41) toward the first wall (21).

6. The battery device according to claim 4, characterized in that The housing (44) is provided with a plurality of the slide grooves (441), the second limiting structure (42) comprises a main body (421) and a plurality of protrusions (422) connected to each other, at least a portion of the main body (421) is accommodated in the housing (44), and at least one of the protrusions (422) cooperates with the first limiting structure (32). The plurality of slide grooves (441) and the plurality of protrusions (422) correspond one to one, so that each protrusion (422) slides in the corresponding slide groove (441).

7. The battery device according to claim 6, characterized in that The plurality of protrusions (422) protrude in different directions relative to the main body (421).

8. The battery device according to claim 1, wherein: The sampling structure (41) includes a temperature sensor (411), and the temperature sensor (411) is used to collect the temperature of the battery cell (20); The sampling structure (41) further comprises a heat-conducting block (412), wherein the heat-conducting block (412) faces the first wall (21), and the temperature sensor (411) is located on a side of the heat-conducting block (412) away from the first wall (21), and the temperature sensor (411) is used to measure the temperature of the heat-conducting block (412).

9. The battery device according to claim 8, characterized in that The sampling member (40) comprises a housing (44), the housing (44) having a second opening (442), the second opening (442) being oriented in the same direction as the first opening (31), a portion of the temperature sensor (411) being accommodated in the housing (44), and another portion of the temperature sensor (411) extending out of the second opening (442) and the first opening (31).

10. The battery device according to claim 8, characterized in that The heat conducting block (412) and the outer shell (44) of the sampling piece (40) are an integrally formed structure.

11. The battery device according to any one of claims 1 to 10, characterized in that 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) so that the sampling member (40) is located between the first limiting structure (32) and the third limiting structure (33).

12. The battery device according to claim 11, wherein: The third limiting structure (33) comprises a connected limiting portion (331) and an elastic structure (332), wherein the limiting portion (331) is used to cooperate with the fourth limiting structure (45). The elastic structure (332) comprises a fixed section (3321) and a bent section (3322); the bent section (3322) is used to connect the limiting portion (331) and the fixed section (3321); and 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 section (3321).

13. The battery device according to any one of claims 1 to 10, characterized in that The battery device further comprises: A connecting assembly (12), the connecting assembly (12) being provided with the fixing member (30), a current collecting component (121), and a data collecting component (122); the connecting assembly (12) being located on a side of the first wall (21) away from the interior of the battery cell (20); the current collecting component (121) being used for electrically connecting a plurality of the battery cells (20); and the data collecting component (122) being used for collecting the voltage and / or current of the battery cells (20).

14. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 13, wherein the battery device is used to supply power to the electrical device.

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