Sampling device, battery assembly, battery system and power utilization device

Abstract

The utility model discloses a sampling device, a battery assembly, a battery system and a power utilization device, the sampling device comprises a sampling element, an assembly part and a sampling circuit, the sampling element is used for collecting data of a battery monomer; the assembly part is used for covering at least part of the side wall of the battery monomer, and the sampling element is connected with the assembly part; the sampling circuit is positioned on the assembly part and is respectively connected with the sampling element and the electrode column positioned on the end wall of the battery monomer. Therefore, the assembly part wraps at least part of the side wall of the single battery, the sampling element is connected with the assembly part, and the sampling circuit is located on the assembly part, so that the sampling element and the sampling circuit are relatively fixed with the single battery through the assembly part; therefore, the sampling element can more stably and efficiently collect the data of the single battery through the sampling circuit and the electrode column.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a sampling device, battery assembly, battery system and power consumption device. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] During battery use, the battery's operating status needs to be sampled and monitored through a sampling module. However, how to collect battery data stably and efficiently has become an urgent technical problem to be solved. Utility Model Content

[0004] The main objective of this application is to provide a sampling device, a battery assembly, a battery system, and an electrical device, which aims to solve the aforementioned technical problems existing in the prior art.

[0005] To address the aforementioned problems, this application provides a sampling device comprising a sampling element, an assembly, and sampling lines. The sampling element is used to collect data from individual battery cells. The assembly covers at least a portion of the sidewalls of the battery cell, and the sampling element is connected to the assembly. The sampling lines are located within the assembly and connect to the sampling element and electrode posts located on the end walls of the battery cell. Thus, by covering at least a portion of the sidewalls of the battery cell with the assembly, connecting the sampling element to the assembly, and having the sampling lines located within the assembly, both the sampling element and the sampling lines are relatively fixed to the battery cell via the assembly. This allows the sampling element to collect data from the battery cell more stably and efficiently via the sampling lines and electrode posts.

[0006] In some embodiments, the electrode post includes two posts with opposite polarities, and the sampling circuit includes two conductive elements. One conductive element is electrically connected to the sampling element and one post, and the other conductive element is electrically connected to the sampling element and another post. Thus, one conductive element connects one sampling element and one post, and the other conductive element electrically connects the sampling element and another post, enabling the sampling element to form a current loop with the battery cell through the two conductive elements and the two posts, facilitating stable and efficient data acquisition from the battery cell.

[0007] In some embodiments, the two conductive elements extend to the same end wall of the battery cell, so that the two conductive elements are conductively connected to the two terminals of the same end wall; or, the two conductive elements extend to two opposite end walls of the battery cell, so that the two conductive elements are conductively connected to the terminals located on the opposite end walls. Thus, the conductive connection of the two conductive elements to the two terminals of the same end wall, or the conductive connection of the two conductive elements to the terminals located on the opposite end walls, further facilitates the conductive connection between the conductive elements and the terminals, enabling the sampling element to stably and efficiently acquire data from the battery cell.

[0008] In some embodiments, the conductive element includes a welding portion for welding and fixing to the terminal post. This welding portion improves the stability of the connection between the conductive element and the terminal post, facilitating stable and efficient data acquisition from individual battery cells by the sampling element.

[0009] In some embodiments, the conductive element includes an elastic portion that elastically supports the electrode post on the surface opposite to the end wall. This elastic support improves the ease of conductive connection between the conductive element and the electrode post, and the elastic force of the elastic portion makes the connection between the conductive element and the electrode post more stable.

[0010] In some embodiments, the assembly includes a sidewall portion and an end face portion. The sidewall portion extends axially along the battery cell and covers at least a portion of the peripheral sidewall of the battery cell. The end face portion covers at least a portion of the end wall of the battery cell. The end face portion and the sidewall portion connect to form a cavity to accommodate the battery cell. Thus, by covering at least a portion of the peripheral sidewall of the battery cell with the sidewall portion, covering at least a portion of the end face of the battery cell with the end face portion, and forming a cavity to accommodate the battery cell, the assembly can provide better protection for the battery cell. Furthermore, the cooperation between the sidewall portion and the end face portion allows for a more stable fixation of the assembly to the battery cell.

[0011] In some embodiments, the assembly includes a mounting component located on the side of the sidewall facing away from the cavity. The mounting component has a receiving space for mounting the sampling element. Thus, the mounting component's location on the sidewall facing away from the cavity and the receiving space for mounting the sampling element facilitates the relative fixation of the sampling element to the battery cells via the mounting component, enabling the collection of data from the battery cells through the sampling element.

[0012] In some embodiments, the assembly includes a wire harness fixing part located on the mounting component and corresponding to the sampling element. The wire harness fixing part is used to fix the data transmission line. Thus, the wire harness fixing part is located on the mounting component and corresponding to the sampling element, and is used to fix the data transmission line so that the data transmission line and the sampling element are relatively fixed, facilitating the transmission of data collected by the sampling element through the data transmission line.

[0013] In some embodiments, the sidewall portion includes a plurality of sidewall sub-portions, which are spaced apart along the axial direction of the battery cell, and each of the plurality of sidewall sub-portions covers at least a portion of the peripheral sidewall of the battery cell. Thus, the plurality of sidewall sub-portions being spaced apart along the axial direction of the battery cell and covering at least a portion of the peripheral sidewall of the battery cell can improve the heat dissipation performance of the assembly while maintaining relative fixation between the assembly and the battery cell.

[0014] In some embodiments, the sampling device further includes an integrated plate, and the number of the mounting components is multiple, with the multiple mounting components fixed to the integrated plate. Thus, by fixing the integrated plate and the multiple mounting components, the sampling device can be simultaneously fixed to multiple battery cells, further improving the assembly efficiency of the mounting components and battery cells.

[0015] To address the aforementioned issues, this application provides a battery assembly comprising individual battery cells and a sampling device as described above.

[0016] To address the aforementioned problems, this application provides a battery system comprising the battery components described above.

[0017] To address the aforementioned problems, this application provides an electrical device comprising the battery system described above. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a vehicle according to one or more embodiments of this application;

[0020] Figure 2 This is an exploded structural diagram of a battery system according to one or more embodiments of this application;

[0021] Figure 3This is a first structural schematic diagram of a battery assembly according to one or more embodiments of this application;

[0022] Figure 4 yes Figure 3 The diagram shows the disassembled structure of the battery assembly.

[0023] Figure 5 This is a schematic diagram of the structure of a sampling device according to one or more embodiments of this application;

[0024] Figure 6 This is a second structural schematic diagram of a battery assembly according to one or more embodiments of this application;

[0025] Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the battery assembly along the AA direction.

[0026] Figure 8 yes Figure 4 The schematic diagram of the battery assembly within the dashed box shown;

[0027] Figure 9 This is a third structural schematic diagram of a battery assembly according to one or more embodiments of this application.

[0028] Reference numerals: 1. Vehicle; 2. Battery system; 3. Controller; 4. Motor; 10. Battery assembly; 20. Battery cell; 21. Electrode post; 30. Housing; 31. First part; 32. Second part; 100. Sampling device; 110. Sampling element; 120. Assembly; 121. Side wall; 1211. Side wall sub-part; 122. End face; 123. Mounting component; 1231. Accommodation space; 124. Wiring harness fixing part; 130. Sampling circuit; 131. Conductive component; 132. Welding part; 133. Elastic part; 134. Integrated plate. Detailed Implementation

[0029] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0031] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0035] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0036] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0037] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0038] Batteries, as discussed in this field, can be categorized into primary batteries and rechargeable batteries based on whether they are rechargeable. Primary batteries, also known as "use-and-discard" batteries or galvanic cells, cannot be recharged after their charge is depleted and must be discarded. Rechargeable batteries, also called secondary batteries or rechargeable batteries, differ from primary batteries in their manufacturing materials and processes. Their advantage lies in their ability to be cycled multiple times after charging, and their output current capacity is higher than most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are lightweight, have a large capacity (1.5 to 2 times that of a nickel-metal hydride battery of the same weight), no memory effect, and a very low self-discharge rate, thus enjoying widespread use despite their relatively high price. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used in these applications is relatively lower, they offer a larger output and charging current, and a longer lifespan, but at a higher cost.

[0039] The batteries described in the embodiments of this application refer to rechargeable batteries or disposable batteries. The embodiments disclosed in this application will be described below primarily using lithium-ion batteries as an example. It should be understood that the embodiments disclosed in this application are applicable to any other suitable type of rechargeable battery. The batteries mentioned in the embodiments disclosed in this application can be directly or indirectly used in suitable devices to power those devices.

[0040] This application provides an electrical device, which may include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. The electrical device may include a battery system, which can provide electrical energy to achieve its corresponding functions.

[0041] This application also provides an electric vehicle that may include a battery system.

[0042] Please refer to Figure 1, Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments of this application.

[0043] 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 battery system 2 is installed inside vehicle 1, and the battery system 2 can be located at the bottom, front, or rear of vehicle 1. The battery system 2 can be used to power vehicle 1; for example, the battery system 2 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery system 2 to supply power to the motor 4, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0044] In some embodiments of this application, the battery system 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0045] To improve the performance of electrical devices, this application also provides a battery system 2, see [link to application]. Figure 2 , Figure 2 This is an exploded structural diagram of a battery system according to one or more embodiments of this application.

[0046] The shape of the battery system 2 may include, but is not limited to, square, cylindrical or other arbitrary shapes.

[0047] In some embodiments, the battery system 2 may include a housing 30 and a battery assembly 10. The battery assembly 10 may include individual battery cells 20, which are housed within the housing 30. The housing 30 provides accommodating space for the individual battery cells 20 and may employ various structures. In some embodiments, the housing 30 may include a first portion 31 and a second portion 32, which overlap each other, defining an accommodating space for housing the individual battery cells 20. The second portion 32 may be a hollow structure with one open end, and the first portion 31 may be a plate-like structure, covering the open side of the second portion 32 so that the first portion 31 and the second portion 32 together define the accommodating space; alternatively, the first portion 31 and the second portion 32 may both be hollow structures with one open side, with the open side of the first portion 31 overlapping the open side of the second portion 32.

[0048] In battery system 2, there can be multiple battery cells 20, which can be connected in series, parallel, or in a hybrid configuration. A hybrid configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 30. Alternatively, battery system 2 can also consist of multiple battery cells 20 first connected in series, parallel, or in a hybrid configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a hybrid configuration to form a whole, which is also housed within the housing 30. Battery system 2 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0049] The battery cell 20 is manufactured using two methods: stacking and winding. Stacked cells offer uniform current collection, lower internal resistance, and higher specific power. However, to improve precision, extremely high mold precision is required, resulting in high equipment investment, complex processes, and low production efficiency. Winded cells are simpler to manufacture, with less stringent precision requirements for equipment during the cell fabrication and assembly processes. They offer high production efficiency and lower costs. In terms of performance, wound cells possess excellent high and low temperature performance, very rapid charging, ultra-long lifespan, stable high output voltage, robust structure, and strong shock resistance.

[0050] To address the technical problems existing in related technologies, this application also provides a battery module 10, see [link to relevant documentation]. Figures 3 to 5 , Figure 3 This is a first structural schematic diagram of a battery assembly according to one or more embodiments of this application; Figure 4 yes Figure 3 The diagram shows the disassembled structure of the battery assembly. Figure 5 This is a schematic diagram of the structure of a sampling device according to one or more embodiments of this application.

[0051] The battery assembly 10 may include a battery cell 20 and a sampling device 100, which can be used to collect data from the battery cell 20.

[0052] A battery cell 20 refers to the smallest unit that makes up the battery system 2. A battery cell 20 may include a casing, electrode assemblies, and other functional components. The casing includes end caps and a housing.

[0053] An end cap is a component that closes onto the opening of the housing to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap can be adapted to the shape of the housing to fit it. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easily deformed under pressure or impact, giving the battery cell 20 higher structural strength and improved safety performance. Functional components such as electrode terminals can be provided on the end cap. The electrode terminals can be used for electrical connection with electrode assemblies to output or input electrical energy to the battery cell 20. In some embodiments, the electrode terminals can include electrode posts. The electrode posts can include positive and negative electrode posts for current output and connection to external circuits. In some embodiments, the end cap can also be provided with an explosion-proof component for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap can also be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating element may be provided on the inner side of the end cap. The insulating element can be used to isolate the electrical connection components within the housing from the end cap to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0054] The housing is a component used to mate with the end cap to form the internal environment of the battery cell 20, wherein the formed internal environment can accommodate electrode components, electrolyte, and other components. The housing and end cap can be independent components, with an opening provided on the housing. The end cap closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap and housing can be integrated. Specifically, the end cap and housing can form a common connecting surface before other components are inserted into the housing, and the end cap closes the housing when it is necessary to encapsulate the interior. The housing can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode components. The housing can be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0055] Electrode assemblies are the components within a single battery cell 20 where electrochemical reactions occur. The casing may contain one or more electrode assemblies. Electrode assemblies are primarily formed by winding or stacking positive and negative electrode plates, and typically, a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0056] The sampling device 100 includes a sampling element 110, a mounting assembly 120, and a sampling line 130. The sampling element 110 is used to collect data from the battery cell 20. The mounting assembly 120 is used to cover at least part of the sidewall of the battery cell 20. The sampling element 110 is connected to the mounting assembly 120. The sampling line 130 is located in the mounting assembly 120 and is connected to the sampling element 110 and the electrode post 21 located on the end wall of the battery cell 20.

[0057] The sampling element 110 can be a chip structure. It can be used to collect state data of the battery cell 20, such as temperature, pressure, and / or voltage data. The sampling element 110 can also have communication functions, such as integrating a communication module. This module allows the sampling element 110 to transmit the collected data to external devices such as a battery management system, and to receive control signals from external devices and transmit these signals back to the battery cell 20 to control its charging and discharging. The communication module may include, but is not limited to, optical communication modules, Bluetooth communication modules, radio frequency communication modules, and carrier communication modules.

[0058] In this embodiment, the battery cell 20 may have sidewalls and endwalls, which are connected together to form the outer casing of the battery cell 20. For example, the battery cell 20 may be a cylindrical battery cell 20. The battery cell 20 may have two endwalls, which are spaced apart axially. The sidewall portion 121 is located between the two endwalls and connects to each endwall. The electrode post 21 may be located on one endwall or simultaneously on both endwalls. At least a portion of the structure of the assembly 120 matches the shape of the sidewall of the battery cell 20. For example, when the battery cell 20 is a cylindrical battery cell 20, the assembly 120 may form a cavity that matches the cylindrical battery cell 20. The assembly 120 covers at least a portion of the sidewall of the battery cell 20 through the cavity, thereby keeping the assembly 120 and the battery cell 20 in a relatively fixed state. When the sampling element 110 is connected to the assembly 120 and the assembly 120 covers at least part of the sidewall of the battery cell 20, the sampling element 110, the assembly 120 and the battery cell 20 can all be kept in a relatively fixed state.

[0059] The sampling line 130 is located in the assembly 120. Specifically, the sampling line 130 may be partially embedded in the assembly 120, partially extended outside the assembly 120, or affixed to the outer surface of the assembly 120, etc. When the sampling element 110 is connected to the assembly 120, the sampling line 130 is located in the assembly 120, and the assembly 120 covers at least a portion of the sidewall of the battery cell 20, the sampling element 110, the assembly 120, the sampling line 130, and the battery cell 20 can all maintain a relatively fixed state. The sampling line 130 may include, but is not limited to, connecting wires, conductive metal sheets, or other structural components that enable conductive connection between the sampling element 110 and the electrode post 21. The sampling line 130 is electrically connected to the sampling element 110 and the electrode post 21 of the battery cell 20, so that the battery cell 20 can supply power to the sampling element 110 through the sampling line 130 and the electrode post 21, and the sampling element 110 can collect data from the battery cell 20 through the sampling line 130 and the electrode post 21.

[0060] In the above-described embodiments, the assembly 120 covers at least a portion of the sidewall of the battery cell 20, the sampling element 110 is connected to the assembly 120, and the sampling line 130 is located in the assembly 120. This allows the sampling element 110 and the sampling line 130 to be relatively fixed to the battery cell 20 through the assembly 120, which facilitates the sampling element 110 to collect data from the battery cell 20 more stably and efficiently through the sampling line 130 and the electrode post 21.

[0061] Furthermore, the electrode post 21 includes two posts with opposite polarities, and the sampling line 130 includes two conductive elements 131. One conductive element 131 is electrically connected to the sampling element 110 and one post, and the other conductive element 131 is electrically connected to the sampling element 110 and another post. The two posts are spaced apart on the end wall of the battery cell 20, with one post being the positive terminal and the other the negative terminal. Both conductive elements 131 can be partially embedded in the assembly 120, partially extended outside the assembly 120, or attached to the outer surface of the assembly 120, etc. The conductive elements 131 may include, but are not limited to, connecting wires, conductive metal sheets, or other structural components that enable the sampling element 110 and the electrode post 21 to be electrically connected. One end of a conductive element 131 is connected to the sampling element 110, and the other end is connected to a terminal. Another conductive element 131 has one end connected to the sampling element 110 and the other end connected to another terminal. This allows the sampling element 110 to be electrically connected to the two terminals of the battery cell 20 through the two conductive elements 131. The battery cell 20 can supply power to the sampling element 110 through the two conductive elements 131 and the two terminals, and allows the sampling element 110 to collect data from the battery cell 20 through the sampling line 130 and the two terminals. Thus, one conductive element 131 connects one sampling element 110 and one terminal, and the other conductive element 131 electrically connects the sampling element 110 and the other terminal. This enables the sampling element 110 to form a current loop with the battery cell 20 through the two conductive elements 131 and the two terminals, facilitating stable and efficient data collection from the battery cell 20 by the sampling element 110.

[0062] Furthermore, the two conductive elements 131 extend to the same end wall of the battery cell 20, so that the two conductive elements 131 are electrically connected to the two terminals of the same end wall. In this embodiment, the battery cell 20 has two end walls spaced apart along the axial direction of the battery cell 20, and the sidewalls of the battery cell 20 are located between the two end walls and connected to the two end walls respectively. The two terminals are spaced apart on the same end wall of the battery cell 20, one end of each of the two conductive elements 131 is connected to the sampling element 110, and the other end of each of the two conductive elements 131 extends along the end of the battery cell 20 with the terminal, so that the two conductive elements 131 are electrically connected to the two terminals of the same end wall.

[0063] Alternatively, the two conductive elements 131 extend to opposite end walls of the battery cell 20, respectively, so that the two conductive elements 131 are electrically connected to the terminals located on the opposite end walls. In this embodiment, the battery cell 20 has two end walls spaced apart along the axial direction of the battery cell 20, and the sidewalls of the battery cell 20 are located between the two end walls and connected to the two end walls respectively. The two terminals are located on different end walls of the battery cell 20, one end of each of the two conductive elements 131 is connected to the sampling element 110, the other end of one conductive element 131 extends toward the end wall where one terminal is located to be electrically connected to that terminal, and the other end of the other conductive element 131 extends toward the end wall where the other terminal is located to be electrically connected to that other terminal.

[0064] In some embodiments, the conductive element 131 includes a welding portion 132 for welding and fixing to the terminal post. The end of the conductive element 131 away from the sampling element 110 can be the welding portion 132, which can be a sheet-like structure. The welding portion 132 can be inserted into the terminal post, and then welded to the terminal post by welding, or the welding portion 132 can be attached to the surface of the terminal post, and then the terminal post and the welding portion 132 are welded along the edge of the welding portion 132. Thus, the welding portion 132 is used to weld and fix to the terminal post, which can improve the stability of the connection between the conductive element 131 and the terminal post, and facilitate the sampling element 110 to collect data from the battery cell 20 stably and efficiently.

[0065] See Figure 6 and Figure 7 , Figure 6 This is a second structural schematic diagram of a battery assembly according to one or more embodiments of this application. Figure 7 yes Figure 6 The diagram shows a cross-sectional view of the battery assembly along the AA direction.

[0066] The conductive element 131 includes an elastic portion 133, which is elastically supported on the surface of the electrode post away from the end wall. The end of the conductive element 131 furthest from the sampling element 110 can be the elastic portion 133, which can be a sheet-like structure. The elastic portion 133 can slightly deform under the support of the electrode post, allowing it to elastically support itself on the surface of the electrode post away from the end wall under its own elastic potential energy. Therefore, the elastic portion 133's elastic support on the surface of the electrode post away from the end wall improves the ease of conductive connection between the conductive element 131 and the electrode post, and the elastic force of the elastic portion 133 makes the connection between the conductive element 131 and the electrode post more stable.

[0067] In some other embodiments, the end of one conductive element 131 away from the sampling element 110 can be an elastic portion 133, and the end of the other conductive element 131 away from the sampling element 110 can be a welded portion 132. Alternatively, the ends of both conductive elements 131 away from the sampling element 110 can be elastic portions 133. Or, the ends of both conductive elements 131 away from the sampling element 110 can be welded portions 132.

[0068] See Figures 3 to 7 The assembly 120 includes a sidewall portion 121 and an end portion 122. The sidewall portion 121 extends axially along the battery cell 20 and covers at least a portion of the peripheral sidewall of the battery cell 20. The end portion 122 covers at least a portion of the endwall of the battery cell 20. The end portion 122 and the sidewall portion 121 are connected to form a cavity to accommodate the battery cell 20. The sidewall portion 121 may have a groove structure. The wall surface of the groove structure may be semi-cylindrical, and the shape of the groove structure may match the shape of the sidewall of the battery cell 20, thereby allowing the sidewall portion 121 to cover a portion of the peripheral sidewall of the battery cell 20. Alternatively, the sidewall portion 121 may be cylindrical, and the internal hollow shape of the sidewall portion 121 may be columnar, and this shape may match the shape of the outer shell of the battery cell 20, so that the sidewall portion 121 covers the entire peripheral sidewall of the battery cell 20. The sidewall portion 121 may be elastic and deformable, so that the sidewall portion 121 can be more stably fixed to at least a portion of the peripheral sidewall of the battery cell 20 through elastic deformation. There may be one or two end portions 122. When there is one end portion 122, one end portion 122 may be connected to one end of the sidewall portion 121; when there are two end portions 122, the two end portions 122 may be connected to the two ends of the sidewall portion 121 respectively, so that the sidewall portion 121 and the end portions 122 together form a columnar cavity structure. Therefore, by having the sidewall portion 121 cover at least a portion of the peripheral sidewall of the battery cell 20, and the end portion 122 cover at least a portion of the end face of the battery cell 20, the end portion 122 and the sidewall portion 121 are connected to form a cavity to accommodate the battery cell 20. This allows the assembly 120 to provide better protection for the battery cell 20, and the cooperation between the sidewall portion 121 and the end portion 122 can also make the assembly 120 more stably fixed to the battery cell 20.

[0069] Furthermore, the sidewall portion 121 includes a plurality of sidewall sub-portions 1211, which are spaced apart along the axial direction of the battery cell 20, and each of the plurality of sidewall sub-portions 1211 covers at least a portion of the peripheral sidewall of the battery cell 20. The number of sidewall sub-portions 1211 can be set according to actual conditions; for example, the number of sidewall sub-portions 1211 can be two, three, four, or more. The shape of each sidewall sub-portion 1211 can match the shape of the sidewall of the battery cell 20, thereby allowing the sidewall sub-portion 1211 to cover a portion of the peripheral sidewall of the battery cell 20. The sidewall sub-portions 1211 can be elastic and deformable, so that the sidewall sub-portions 1211 can be more stably fixed to a portion of the peripheral sidewall of the battery cell 20 through elastic deformation. Therefore, multiple sidewall sub-parts 1211 are spaced apart along the axial direction of the battery cell 20, and each of the multiple sidewall sub-parts 1211 covers at least a portion of the peripheral sidewall of the battery cell 20, which can improve the heat dissipation performance of the assembly 120 while keeping the assembly 120 and the battery cell 20 relatively fixed.

[0070] Combination Figure 8 , Figure 8 yes Figure 4 The diagram shows the structure of the battery assembly within the dashed box.

[0071] The assembly 120 includes a mounting component 123 located on the side of the sidewall 121 facing away from the cavity. The mounting component 123 has a receiving space 1231 for mounting the sampling element 110. The mounting component 123 can be plate-shaped and connected to the sidewall 121 facing away from the cavity. The receiving space 1231 can be a groove-shaped structure. The sampling element 110 is installed in the receiving space 1231, which protects the sampling element 110 and facilitates its installation in the assembly 120. This allows the sampling element 110 to be relatively fixed to the battery cell 20 via the mounting component 123, enabling stable and efficient data collection from the battery cell 20. When the assembly 120 includes multiple sidewall sub-parts 1211, all of them are connected to the mounting component 123, forming a single integrated structure.

[0072] Furthermore, the assembly 120 includes a wiring harness fixing part 124, which is located on the mounting part 123 and correspondingly disposed with respect to the sampling element 110. The wiring harness fixing part 124 is used to fix the data transmission line. The data transmission line can be used to communicate with the sampling element 110. The sampling element 110 can transmit the collected data of the battery cell 20 to the data transmission line, which then transmits the data of the battery cell 20 to an external device. The data transmission line can also receive control signals from the external device and transmit the control signals to the sampling element 110, which then transmits the control signals to the battery cell 20 to control the charging and discharging of the battery cell 20. The wiring harness fixing part 124 may include, but is not limited to, a snap-fit ​​groove, a fixing hole, etc. The data transmission line can be fixed to the wiring harness fixing part 124 by binding, snap-fitting, adhesive bonding, etc. The wiring harness fixing part 124 may include two wire-clamping parts spaced apart. When viewed along a direction perpendicular to the distance between the two wire-clamping parts, the sampling element 110 is at least partially located between the two wire-clamping parts, and the data transmission line passes through the two wire-clamping parts. Both cable-locking sections can have a slot structure, the shape and size of which can match the shape and size of the data transmission line. This allows the data transmission line to be secured within the slots of the two cable-locking sections, with a portion of the data transmission line spanning between the two cable-locking sections. When the sampling element 110 is located between the two cable-locking sections, the sampling element 110 and the data transmission line located between the two cable-locking sections are positioned accordingly, facilitating the transmission of data from the battery cell 20 to the data transmission line via wireless communication. Therefore, the wiring harness fixing part 124 is located on the mounting part 123 and is positioned correspondingly to the sampling element 110. The wiring harness fixing part 124 is used to fix the data transmission line, ensuring that the data transmission line and the sampling element 110 are relatively fixed, facilitating the transmission of data collected by the sampling element 110 via the data transmission line.

[0073] See Figure 9 , Figure 9 This is a third structural schematic diagram of a battery assembly according to one or more embodiments of this application.

[0074] The sampling device 100 also includes an integrated plate 134 and multiple mounting parts 120, which are fixed to the integrated plate 134. The integrated plate 134 can be separate from the multiple mounting parts 120; specifically, the integrated plate 134 may have multiple mounting positions, each for mounting one mounting part 120. Alternatively, the integrated plate 134 and multiple mounting parts 120 can be integrated as a single unit. The integrated plate 134 may have multiple mounting positions, each corresponding to one mounting part 120. These mounting positions can be used to mount sampling elements 110, so that each sampling element 110 corresponds to one mounting part 120, thereby enabling one sampling element 110 to collect data from the corresponding battery cell 20. When there are multiple mounting parts 120, the number of sampling elements 110 and the number of sampling lines 130 are the same as the number of mounting parts 120, with each sampling element 110 and each sampling line 130 corresponding to one mounting part 120. Therefore, by integrating the plate 134 and fixing multiple components 120, the sampling device 100 can be fixed with multiple battery cells 20 at the same time, further improving the assembly efficiency of the components 120 and the battery cells 20.

[0075] In summary, the assembly 120 covers at least part of the sidewall of the battery cell 20, the sampling element 110 is connected to the assembly 120, and the sampling line 130 is located in the assembly 120. This allows the sampling element 110 and the sampling line 130 to be relatively fixed to the battery cell 20 through the assembly 120, which facilitates the sampling element 110 to collect data from the battery cell 20 more stably and efficiently through the sampling line 130 and the electrode post 21.

[0076] 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 sampling device, characterized in that, The sampling device includes: Sampling elements are used to collect data from individual battery cells; An assembly for covering at least a portion of the sidewalls of the battery cell, wherein the sampling element is connected to the assembly; The sampling line is located in the assembly and is connected to the sampling element and the electrode post located on the end wall of the battery cell.

2. The sampling device according to claim 1, characterized in that, The electrode post includes two electrodes with opposite polarities, and the sampling line includes two conductive elements. One conductive element is electrically connected to the sampling element and one electrode post, and the other conductive element is electrically connected to the sampling element and the other electrode post.

3. The sampling device according to claim 2, characterized in that, The two conductive elements extend to the same end wall of the battery cell so that the two conductive elements are electrically connected to the two terminals of the same end wall; Alternatively, the two conductive elements extend to opposite end walls of the battery cell, respectively, so that the two conductive elements are electrically connected to the terminals located on opposite end walls.

4. The sampling device according to claim 2, characterized in that, The conductive component includes a welding portion for welding and fixing to the electrode post.

5. The sampling device according to claim 2, characterized in that, The conductive element includes an elastic portion that is elastically supported on the surface of the electrode post facing away from the end wall.

6. The sampling device according to any one of claims 1 to 5, characterized in that, The assembly includes a sidewall portion and an end portion. The sidewall portion extends axially along the battery cell and covers at least a portion of the peripheral sidewall of the battery cell. The end portion covers at least a portion of the endwall of the battery cell. The end portion and the sidewall portion are connected to form a cavity to accommodate the battery cell.

7. The sampling device according to claim 6, characterized in that, The assembly includes a mounting component located on the side wall portion opposite to the cavity, and the mounting component has a receiving space for mounting the sampling element.

8. The sampling device according to claim 7, characterized in that, The assembly includes a wire harness fixing part, which is located on the mounting component and is correspondingly disposed with respect to the sampling element. The wire harness fixing part is used to fix the data transmission line.

9. The sampling device according to claim 6, characterized in that, The sidewall portion includes a plurality of sidewall sub-portions, which are spaced apart along the axial direction of the battery cell, and each of the plurality of sidewall sub-portions covers at least a portion of the peripheral sidewall of the battery cell.

10. The sampling device according to claim 1, characterized in that, The sampling device also includes an integrated plate, and there are multiple assembly parts, which are fixed to the integrated plate.

11. A battery assembly, characterized in that, The battery assembly includes individual battery cells and a sampling device as described in any one of claims 1 to 10.

12. A battery system, characterized in that, The battery system includes the battery assembly as described in claim 11.

13. An electrical appliance, characterized in that, The electrical device includes the battery system as described in claim 12.

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