Battery device and electric device

Abstract

The invention provides a battery device and a power utilization device.The battery device comprises a battery single body assembly, a heat management assembly and a sampling assembly, the battery single body assembly comprises a plurality of battery single bodies arranged in the first direction, each battery single body comprises electrode terminals, and the two electrode terminals in each battery single body are arranged side by side in the second direction; the electrode terminal is positioned on one side of the battery monomer in the third direction, and the first direction, the second direction and the third direction are intersected pairwise. And the heat management assembly is positioned on one side, provided with the electrode terminal, of the battery monomer along the third direction, and is arranged side by side with the electrode terminal in the second direction. The sampling assembly is located on the side, provided with the electrode terminal, of the single battery in the third direction, and in a projection plane perpendicular to the third direction, the projection of the heat management assembly and the projection of the sampling assembly at least partially coincide.

Description

[0001] This application is a divisional application based on the invention with application number 202511385196.5, application date September 26, 2023, applicant CATL, and invention title "Battery Device and Power Consumption Device". Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0003] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0004] In the development of battery technology, improving the energy density of battery devices has become a research direction. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and an electrical device that can improve the energy density of the battery device.

[0006] On one hand, the present application provides a battery device, which includes a battery cell assembly, a thermal management assembly, and a sampling assembly. The battery cell assembly includes a plurality of battery cells arranged along a first direction. Each battery cell includes an electrode terminal. Two electrode terminals in the battery cell are arranged side by side in a second direction, and the electrode terminals are located on the side of the battery cell in a third direction. The first direction, the second direction, and the third direction intersect each other.

[0007] The thermal management component is located on the side of the battery cell with electrode terminals along a third direction, and is arranged side by side with the electrode terminals in a second direction. The sampling component is located on the side of the battery cell with electrode terminals along a third direction, and the projections of the thermal management component and the sampling component at least partially overlap in a projection plane perpendicular to the third direction.

[0008] In the above scheme, by both the thermal management component and the sampling component being located on the side of the battery cell where the electrode terminals are located, and by ensuring that their orthographic projections in a projection plane perpendicular to the third direction at least partially overlap, the need for the thermal management component and the sampling component to avoid interference with the electrode terminals is satisfied. Furthermore, because the two components are overlapped in the third direction, the presence of the sampling component has a relatively small impact on the size of the thermal management component in the second direction. This helps to increase the size of the thermal management component in the second direction, thereby enhancing the thermal management component's temperature regulation effect on the battery cell.

[0009] Furthermore, in this design, at least one of the thermal management component and the sampling component can share space relative to the electrode terminals in the third direction, thereby reducing the size of the battery device in the third direction and increasing the energy density of the battery device. In addition, when the sampling component is used to implement voltage sampling, this design also helps to reduce the distance between the sampling component and the electrode terminals, reduce the corresponding line length of the sampling component, and improve voltage sampling accuracy.

[0010] In some embodiments, a plurality of electrode terminals arranged side by side in a first direction in a battery cell assembly form a terminal group, and the sampling component and the thermal management component are both located between two terminal groups of a single battery cell assembly.

[0011] In the above scheme, by placing both the sampling component and the thermal management component between the two terminal groups of a single battery cell, the larger size of the first region in the second direction helps to increase the size of the sampling component and the thermal management component, thus meeting the spatial layout requirements of the sampling component and the thermal management component.

[0012] In some embodiments, the battery cell further includes a pressure relief mechanism located between two electrode terminals of the battery cell, wherein, in a projection plane perpendicular to a third direction, the orthographic projection of at least a portion of the pressure relief mechanism is located outside the orthographic projection of the thermal management component.

[0013] In the above scheme, the sampling component is located between the two terminal groups of a single battery cell assembly, while the thermal management component is located between the terminal groups of two adjacent battery cell assemblies, or the thermal management component is located on the same side of all terminal groups in the second direction. This design allows the thermal management component located between the terminal groups of two adjacent battery cell assemblies to simultaneously control the temperature of both battery cell assemblies, while the sampling component can sample the voltage of the two terminal groups of a single battery cell assembly. This helps to shorten the line length corresponding to voltage sampling, facilitating the implementation of the sampling function.

[0014] In some embodiments, the battery cell further includes a pressure relief mechanism, wherein the battery terminals and the pressure relief mechanism are disposed on the same side of the battery cell in a third-party orientation, the pressure relief mechanism is located between two terminal groups of a single battery cell assembly, and the sampling assembly covers the pressure relief mechanism.

[0015] In the above scheme, the pressure relief mechanism and the thermal management component are located on the same side of the battery cell. Considering that the thermal management component has strong structural strength and that both the thermal management component and the pressure relief mechanism are located between two terminal groups of a single battery cell, at least a portion of the orthographic projection of the pressure relief mechanism is located outside the orthographic projection of the thermal management component. This allows the thermal management component to avoid the pressure relief mechanism, thereby reducing the adverse effects of the thermal management component on the pressure relief process and improving the pressure relief reliability of the battery cell.

[0016] In some embodiments, multiple battery cell assemblies are arranged side by side in a second direction, and multiple electrode terminals arranged side by side in a first direction in the battery cell assembly form a terminal group. The sampling component and the thermal management component are both located between the terminal groups of two adjacent battery cell assemblies.

[0017] In the above scheme, by placing both the sampling component and the thermal management component between the terminal groups of two adjacent battery cell components, the larger size of the two adjacent second regions in the second direction helps to increase the size of the sampling component and the thermal management component, thereby meeting the spatial layout requirements of the sampling component and the thermal management component.

[0018] In some embodiments, the battery device further includes a busbar electrically connected to the electrode terminals, and a sampling component connected to the busbar; and / or, the battery cell includes a housing, the electrode terminals are disposed on the housing, and the sampling component is connected to the housing.

[0019] In the above scheme, depending on the actual sampling needs, there are multiple connection relationships between the sampling component and the battery cell. Specifically, the sampling component can be connected to the outer casing to realize the temperature sampling needs of the battery cell, or the sampling component can be connected to the busbar to realize the voltage sampling needs of the battery cell. This helps to improve the flexibility between the sampling component and the battery cell and meet the actual needs of the battery device under different conditions.

[0020] In some embodiments, the sampling component is at least partially located on the side of the thermal management component away from the battery cell, the thermal management component has a clearance portion extending through a third direction, and the sampling component is partially located within the clearance portion and connected to the housing.

[0021] In the above scheme, the sampling component is at least partially located on the side of the thermal management component away from the battery cell. The thermal management component can provide some support and load-bearing for the sampling component, enhancing its structural reliability. Furthermore, the thermal management component can be closer to the battery cell, thereby improving its temperature regulation effect on the battery cell. Additionally, the thermal management component includes a clearance section, through which the sampling component can connect to the housing. This reduces the adverse effects of the thermal management component's presence on the connection between the sampling component and the housing, improving both the energy density of the battery device and the reliability of the operation of both the thermal management component and the sampling component.

[0022] In some embodiments, the thermal management component includes a heat conductor and a heat exchanger located on the side of the heat conductor away from the battery cell assembly. The heat exchanger has a flow channel for the flow of the heat exchange medium. In a projection plane perpendicular to a third direction, the projected area of ​​the heat conductor is larger than the projected area of ​​the heat exchanger.

[0023] In the above scheme, considering that the tubular structure corresponding to the heat exchanger has a smaller size than the battery cell assembly, a heat-conducting component is set between the battery cell assembly and the heat exchanger, and the projected area of ​​the heat-conducting component is set to be larger than the projected area of ​​the heat exchanger. In this way, the uniformity of temperature distribution on the battery cell assembly is improved by means of the heat-conducting component. This design can enhance the temperature regulation effect of the thermal management component on the battery cell assembly.

[0024] In some embodiments, the sampling component is connected to the side of the heat exchanger away from the battery cell assembly; or, the sampling component is connected between the heat-conducting component and the battery cell assembly.

[0025] In the above scheme, whether the sampling component is connected to the side of the heat exchanger away from the battery cell assembly or connected between the heat conductor and the battery cell assembly, the connection between the sampling component and the thermal management component can be achieved. This helps improve the relative positional reliability between the sampling component and the thermal management component, reduces the risk of relative displacement between them, and this design does not affect the connection between the heat exchanger and the heat conductor, thus meeting the fabrication requirements of the thermal management component. Furthermore, the sampling component can also sample the temperature of the thermal management component. Based on the obtained temperature information of the outer shell and the thermal management component, the flow rate and temperature of the heat exchange medium can be matched and adjusted to achieve real-time control and improve the control accuracy of battery cell temperature regulation.

[0026] In some embodiments, a sampling assembly is connected to the side of the heat exchanger away from the battery cell assembly. The sampling assembly includes a body extending along a first direction and a first sampling portion connected to the body. The body is located on the side of the heat exchanger away from the battery cell assembly. The first sampling portion includes a first sub-part and a second sub-part. The first sub-part is bent at both ends in a third direction and connected to the second sub-part and the body. The second sub-part is connected to the heat exchanger and detects the temperature of the heat exchanger.

[0027] In the above scheme, within the projection plane perpendicular to the third direction, the orthographic projection of the main body overlaps with the orthographic projection of the heat-conducting component, and the orthographic projection of the first sampling unit overlaps with the orthographic projection of the heat exchanger. This design reduces the impact of the sampling component on the size of the thermal management component in the second direction, thereby increasing the size of the thermal management component in the second direction and enhancing the temperature regulation effect of the thermal management component on the battery cells. Furthermore, this design positions the sampling component on the side of the thermal management component away from the battery cell assembly, so the presence of the sampling component does not affect the heat transfer between the thermal management component and the battery cell assembly, which also helps to enhance the temperature regulation effect of the thermal management component on the battery cells.

[0028] In some embodiments, a plurality of first sampling units are spaced apart in a first direction and connected to the same body unit.

[0029] In the above scheme, multiple first sampling units can be connected to the thermal management component at different locations to improve the relative positional reliability between the sampling component and the thermal management component. These multiple first sampling units can also be used to collect the temperature of different regions of the thermal management component in the first direction. By acquiring temperature information from multiple regions, parameters such as the flow rate of the heat exchange medium can be further adjusted, thereby helping to enhance the control accuracy of the temperature of the corresponding battery cell.

[0030] In some embodiments, the battery cell includes a housing and an electrode assembly located within the housing. The housing includes a wall portion, and electrode terminals are disposed on the wall portion and protrude from a side surface of the wall portion opposite to the electrode assembly. The battery device also includes a busbar member connected to the side of the electrode terminals opposite to the electrode assembly. Along a third direction, at least a portion of the sampling assembly is located between the wall portion and the busbar member; and / or, at least a portion of the thermal management assembly is located between the wall portion and the busbar member.

[0031] In the above scheme, there is a gap between the busbar and the wall in the third direction, and at least one of the thermal management component and the sampling component can extend into this gap, thereby helping to further improve space utilization and increase the energy density of the battery device. Furthermore, the sampling component can be positioned closer to the busbar to facilitate voltage sampling. As for the thermal management component, it can have a larger size in the second direction, thereby improving the temperature regulation effect on the individual battery cells and enhancing the reliability of the battery device.

[0032] Secondly, embodiments of this application provide an electrical device, which includes the battery device in any of the foregoing embodiments.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application; Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 3 yes Figure 2 A schematic diagram of the enlarged local structural relationships in the diagram; Figure 4 This is a simplified cross-sectional structural diagram of another battery device provided in some embodiments of this application; Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure corresponding to the battery device shown. Figure 6 yes Figure 5 A magnified structural diagram of region Q in the middle region; Figure 7 This is a simplified cross-sectional structural diagram of another battery device provided in some embodiments of this application.

[0036] Tag name: 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor; 10. Battery cell assembly; 11. Battery cell; 111. Electrode terminal; 112. Pressure relief mechanism; 113. Housing; 113a. Wall; 114. Electrode assembly; 115. Current collector; 20. Sampling component; 21. Main body; 22. First sampling unit; 221. First sub-unit; 222. Second sub-unit; 23. Second sampling unit; 24. Third sampling unit 30. Thermal management components; 31. Heat exchanger; 32. Thermal conductive components; 33. Clearance parts; 40. Busbar components; D. Terminal group; A1, Area 1; A2, Area 2; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0042] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0043] 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.

[0044] 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).

[0045] 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.

[0046] 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.

[0047] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0048] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0049] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0050] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is also included between the casing and the electrode assembly 114. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0051] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0052] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0053] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0054] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0055] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0056] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0057] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0058] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0059] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0060] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0061] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0062] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0063] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0064] A battery device includes individual battery cells, which power the electrical device. In addition to the individual battery cells, the battery device also includes a sampling component and a thermal management component. The sampling component samples the temperature or voltage of the individual battery cells and provides this information to the Battery Management System (BMS). The BMS then uses this information to adjust the temperature or voltage of the individual battery cells. The thermal management component regulates the temperature of the individual battery cells. However, the placement of these components often occupies internal space within the battery device, thus affecting its overall energy density.

[0065] In view of this, embodiments of this application provide a battery device and an electrical device, wherein at least one of the thermal management component and the sampling component can share space relative to the electrode terminals in a third direction, thereby reducing the size of the battery device in the third direction and increasing the energy density of the battery device. Furthermore, when the sampling component is used to implement a voltage sampling function, this design also helps to reduce the distance between the sampling component and the electrode terminals, reduce the corresponding line length of the sampling component, and improve the voltage sampling accuracy.

[0066] The technical solutions described in this application are applicable to battery devices and electrical devices using battery devices. Electrical devices can take many forms, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0067] The battery devices described in this application are not limited to the electrical devices described above, but for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0068] Please see Figure 1 , Figure 1This is a simplified schematic diagram of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 can be installed inside the vehicle 1000; specifically, for example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 100 may also include a controller 200 and a motor 300. The controller 200, for example, is used to control the battery to supply power to the motor 300. The battery device 100 can be used for starting, navigation, etc., of the vehicle 1000. Of course, the battery device 100 can also be used to drive the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide propulsion for the vehicle 1000.

[0069] Next, the structure of the battery device 100 will be described in conjunction with the accompanying drawings. Please refer to the attached drawings. Figures 2 to 6 The battery device 100 includes a battery cell assembly 10, a thermal management assembly 30, and a sampling assembly 20. The battery cell assembly 10 includes a plurality of battery cells 11 arranged along a first direction X. Each battery cell 11 includes an electrode terminal 111. Two electrode terminals 111 in the battery cell 11 are arranged side by side in a second direction Y, and the electrode terminals 111 are located on one side of the battery cell 11 in a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other.

[0070] The thermal management component 30 is located along the third direction Z on the side of the battery cell 11 where the electrode terminal 111 is provided, and is arranged side by side with the electrode terminal 111 in the second direction Y. The sampling component 20 is located along the third direction Z on the side of the battery cell 11 where the electrode terminal 111 is provided, and in the projection plane perpendicular to the third direction Z, the projection of the thermal management component 30 and the projection of the sampling component 20 at least partially overlap.

[0071] The battery cell assembly 10 is the core component in the battery device 100 used to provide power. The battery device 100 may include only one battery cell assembly 10, or it may include multiple battery cell assemblies 10. Figure 2 The diagram illustrates a battery device 100 comprising multiple battery cell assemblies 10, with adjacent battery cell assemblies 10 separated by bold dashed lines. Within a single battery cell assembly 10, multiple battery cells 11 are arranged side-by-side in a first direction X, and these battery cells 11 can be connected in series, parallel, or a combination thereof. A combination thereof refers to a configuration where multiple battery cells 11 are connected in both series and parallel configurations.

[0072] Each battery cell 11 includes electrode terminals 111, which are used to establish electrical connections between the battery cell 11 and other external structures. A single battery cell 11 includes two electrode terminals 111, located on the same side of the battery cell 11 in the third direction Z, and spaced apart in the second direction Y. Optionally, the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other, i.e., the angle between any two directions is 90°.

[0073] In some optional embodiments, the battery cell 11 further includes a housing 113 and an electrode assembly 114. The housing 113 has a hollow structure, and the electrode assembly 114 is housed within the housing 113. Electrode terminals 111 are disposed on the housing 113. The electrode assembly 114 is the core component in the battery cell 11 for realizing the charging and discharging function. The electrode assembly 114 can be formed by winding or stacking multiple layers of electrode sheets. Further, the electrode assembly 114 includes an electrode body and tabs. The electrode body is the main component of the electrode assembly 114, while the tabs are components in the electrode assembly 114 used for electrical connection to the electrode terminals 111.

[0074] It should be noted that there are various electrical connection methods between the electrode terminal 111 and the electrode tab. For example, the electrode terminal 111 and the electrode tab can be directly connected, or the battery cell 11 can also include a current collector 115, through which the electrode terminal 111 is indirectly connected to the electrode tab. The figure shows the case where the electrode terminal 111 is indirectly connected to the electrode tab through the current collector 115.

[0075] The sampling component 20 can sample the battery cell assembly 10. Optionally, the sampling component 20 can provide the acquired sampling information to the battery management system, and then the battery management system can adjust the battery cell assembly 10 based on the sampling information. Depending on the actual needs, the sampling component 20 can sample only the temperature of the battery cell assembly 10, or it can sample only the voltage of the battery cell assembly 10, or it can sample both the temperature and voltage of the battery cell assembly 10.

[0076] The thermal management component 30 can regulate the temperature of the battery cell assembly 10 so that the battery cell assembly 10 can operate under favorable temperature conditions. The thermal management component 30 can take various forms; for example, the thermal management component 30 may consist only of a water-cooled plate, or it may also include a heat spreader and water-cooled pipes used in conjunction.

[0077] In order to avoid the electrode terminal 111, the side of the battery cell 11 with the electrode terminal 111 can often only be provided with one of the thermal management component 30 and the sampling component 20, or both the thermal management component 30 and the sampling component 20 can be provided on the side of the battery cell 11 without the electrode terminal 111 in the third direction Z. This design will increase the size of the battery device 100 in the third direction Z, affecting the energy density of the battery device 100.

[0078] To address this issue, this application embodiment adjusts the layout of the thermal management component 30 and the sampling component 20. Specifically, the thermal management component 30 and the sampling component 20 are located on the same side of the battery cell assembly 10 in the third direction Z, and both are located on the side of the battery cell 11 where the electrode terminals 111 are located. Furthermore, to meet the need for the thermal management component 30 and the sampling component 20 to avoid overlap with the electrode terminals 111, this application embodiment further arranges the orthographic projections of the thermal management component 30 and the sampling component 20 to at least partially overlap in the projection plane perpendicular to the third direction Z. That is, in the third direction Z, one of the thermal management component 30 and the sampling component 20 covers at least a portion of the other's area.

[0079] It should be noted that the thermal management component 30 and the sampling component 20 can have various layout configurations. For example, the battery cell 11 includes a first region A1 located between two electrode terminals 111 and a second region A2 located on the same side of the two electrode terminals 111 in the second direction Y. Depending on actual needs, the thermal management component 30 and the sampling component 20 can both be correspondingly disposed in the first region A1, or they can both be correspondingly disposed in the second region A2. Furthermore, for the thermal management component 30 and the sampling component 20, the portion of the sampling component 20 overlapping with the thermal management component 30 in the third direction Z can be located on the side of the thermal management component 30 away from the battery cell 11, allowing the thermal management component 30 to be closer to the battery cell 11, thereby improving the temperature regulation effect of the thermal management component 30 on the battery cell 11. Alternatively, the portion of the sampling component 20 overlapping with the thermal management component 30 in the third direction Z can be located on the side of the thermal management component 30 facing the battery cell 11, allowing the sampling component 20 to act as insulation between the thermal management component 30 and the battery cell 11. Furthermore, the portion of the sampling component 20 that overlaps with the thermal management component 30 in the third direction Z can be connected to the thermal management component 30 by means of adhesive or other methods, thereby serving to support and fix the sampling component 20 and maintain the flatness of the sampling component 20.

[0080] In this embodiment, by both the thermal management component 30 and the sampling component 20 being located on the side of the battery cell 11 where the electrode terminals 111 are located, and by ensuring that their orthographic projections in a projection plane perpendicular to the third direction Z at least partially overlap, the need for the thermal management component 30 and the sampling component 20 to avoid interference with the electrode terminals 111 is satisfied. Furthermore, since they are overlapped in the third direction Z, the presence of the sampling component 20 has a relatively small impact on the size of the thermal management component 30 in the second direction Y. This helps to increase the size of the thermal management component 30 in the second direction Y, thereby enhancing the temperature regulation effect of the thermal management component 30 on the battery cell 11.

[0081] Furthermore, in this design, at least one of the thermal management component 30 and the sampling component 20 can share space relative to the electrode terminal 111 in the third direction Z, thereby reducing the size of the battery device 100 in the third direction Z and increasing the energy density of the battery device 100. In addition, when the sampling component 20 is used to implement the voltage sampling function, this design also helps to reduce the distance between the sampling component 20 and the electrode terminal 111, reduce the line length corresponding to the sampling component 20, and improve the voltage sampling accuracy.

[0082] In some embodiments, such as Figures 2 to 6 As shown, in the battery cell assembly 10, a plurality of electrode terminals 111 arranged side by side in the first direction X form a terminal group D, and the sampling component 20 and the thermal management component 30 are both located between the two terminal groups D of the single battery cell assembly 10.

[0083] Terminal group D includes a plurality of electrode terminals 111 arranged side by side in the first direction X. Since the battery cell 11 includes two electrode terminals 111 and the two electrode terminals 111 are located on the same side of the battery cell 11 in the third direction Z, the single battery cell assembly 10 includes two terminal groups D and the two terminal groups D are located on the same side of the battery cell assembly 10 in the third direction Z.

[0084] Both the sampling component 20 and the thermal management component 30 are located between the two terminal groups D of a single battery cell assembly 10, that is, both the sampling component 20 and the thermal management component 30 are located in the first region A1 of the battery cell 11. For a single battery cell 11, the battery cell 11 will include two second regions A2, and the two second regions A2 are located on both sides of the first region A1 in the second direction Y. Furthermore, the size of a single second region A2 in the second direction Y is often smaller than the size of the first region A1 in the second direction Y.

[0085] In view of this, the embodiments of this application place the sampling component 20 and the thermal management component 30 between the two terminal groups D of a single battery cell assembly 10, thereby increasing the size of the sampling component 20 and the thermal management component 30 by utilizing the larger size of the first region A1 in the second direction Y, so as to meet the spatial layout requirements of the sampling component 20 and the thermal management component 30.

[0086] It should be noted that the solution provided in this application embodiment can be applied to the case where the battery device 100 includes only one battery cell assembly 10, or to the case where the battery device 100 includes multiple battery cell assemblies 10. Further, when the battery device 100 includes multiple battery cell assemblies 10, in order to meet the sampling needs of multiple battery cell assemblies 10, the number of sampling components 20 also needs to be set to multiple, and the number of sampling components 20 can be the same as the number of battery cell assemblies 10. As for the thermal management component 30, depending on the design, there can be only one thermal management component 30, that is, the parts of the structure corresponding to different battery cell assemblies 10 and used for temperature regulation are connected together. Alternatively, there can be multiple thermal management components 30, and the number can be the same as the number of battery cell assemblies 10. That is, multiple thermal management components 30 are respectively corresponding to multiple battery cell assemblies 10, and different thermal management components 30 are independent of each other.

[0087] In some embodiments, such as Figure 3 As shown, the battery cell 11 also includes a pressure relief mechanism 112, which is located between the two electrode terminals 111 of the battery cell 11. In the projection plane perpendicular to the third direction Z, the orthographic projection of at least a portion of the structure of the pressure relief mechanism 112 is located outside the orthographic projection of the thermal management assembly 30.

[0088] The pressure relief mechanism 112 is a component or part that is actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 11 reaches a predetermined threshold. This threshold design varies depending on design requirements. It may depend on one or more materials among the positive electrode, negative electrode, electrolyte, and separator in the battery cell 11. The internal pressure of the battery cell 11 is the same as the pressure inside the casing 113.

[0089] The pressure relief mechanism 112 can take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically employ a pressure-sensitive element or structure. That is, when the internal pressure of the battery cell 11 reaches a predetermined threshold, the pressure relief mechanism 112 actuates or a weak part provided in the pressure relief mechanism 112 ruptures, thereby forming an opening or channel for releasing internal pressure. The weak part can be formed by setting grooves, indentations, or using materials with low strength.

[0090] The term "actuation" as used in this application refers to the pressure relief mechanism 112 being activated or undergoing a certain state, thereby releasing the internal pressure of the battery cell 11. The action of the pressure relief mechanism 112 may include, but is not limited to, at least a portion of the pressure relief mechanism 112 rupturing, breaking, tearing, or opening, etc. When the pressure relief mechanism 112 is actuated, the high-temperature, high-pressure substances inside the battery cell 11 are discharged outwards from the actuated portion as waste. This method allows for pressure relief of the battery cell 11 under controllable pressure, thereby preventing potentially more serious accidents.

[0091] The emissions from the battery cell 11 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0092] The pressure relief mechanism 112 and the thermal management component 30 are located on the same side of the battery cell 11. Considering that the thermal management component 30 has strong structural strength, and that both the thermal management component 30 and the pressure relief mechanism 112 are located between the two terminal groups D of a single battery cell assembly 10, at least a portion of the orthographic projection of the pressure relief mechanism 112 is located outside the orthographic projection of the thermal management component 30, so that the thermal management component 30 can avoid the pressure relief mechanism 112, thereby reducing the adverse effects of the thermal management component 30 on the pressure relief process and improving the pressure relief reliability of the battery cell 11.

[0093] It should be noted that the sampling component 20 typically has low structural strength and a low melting point. Therefore, the sampling component 20 often melts before the temperature reaches the predetermined threshold. When the gas pressure reaches the predetermined threshold, the sampling component 20 will also break under pressure. Thus, the presence of the sampling component 20 will not affect the pressure relief reliability of the battery cell 11.

[0094] Therefore, the sampling component 20 and the pressure relief mechanism 112 can be arranged in various ways. For example, the sampling component 20 can be arranged to avoid the pressure relief mechanism 112, that is, in the projection plane perpendicular to the third direction Z, the orthographic projection of at least a portion of the structure of the pressure relief mechanism 112 is located outside the orthographic projection of the sampling component 20. Alternatively, the sampling component 20 can also be arranged without avoiding the pressure relief mechanism 112, that is, in the projection plane perpendicular to the third direction Z, the orthographic projection of the sampling component 20 covers the orthographic projection of the pressure relief mechanism 112.

[0095] In some alternative embodiments, such as Figure 3As shown, the battery device 100 has two sampling components 20 between the two terminal groups D of a single battery cell assembly 10. A pressure relief mechanism 112 is arranged between the two sampling components 20. Thus, the two sampling components 20 can sample the voltage of the two terminal groups D of the single battery cell assembly 10 respectively, which meets the voltage sampling requirements. In addition, this design can also achieve the avoidance of the sampling components 20 relative to the pressure relief mechanism 112, and reduce the use of materials corresponding to the sampling components 20, thereby reducing the manufacturing cost.

[0096] In addition, in some other embodiments, the pressure relief mechanism 112 may be located on a different side of the battery cell 11 in the third direction Z from the electrode terminal 111. In this case, the presence of the thermal management component 30 will not affect the pressure relief process. Therefore, in the projection plane perpendicular to the third direction Z, the orthographic projection of the thermal management component 30 can cover the orthographic projection of the pressure relief mechanism 112. That is, the thermal management component 30 does not need to be designed to avoid the pressure relief mechanism 112.

[0097] In some embodiments, please refer to Figure 7 Multiple battery cell assemblies 10 are arranged side by side in the second direction Y. Multiple electrode terminals 111 arranged side by side in the first direction X of the battery cell assembly 10 form a terminal group D. The sampling assembly 20 and the thermal management assembly 30 are both located between the terminal groups D of two adjacent battery cell assemblies 10.

[0098] The battery device 100 includes a plurality of battery cell assemblies 10, which are arranged side by side in the second direction Y. Based on this, for two adjacent battery cells 11 in the second direction Y, there are two adjacent second regions A2 between the two first regions A1 corresponding to the two battery cells 11. The region formed by the two adjacent second regions A2 can have a large size in the second direction Y.

[0099] In view of this, the embodiments of this application place the sampling component 20 and the thermal management component 30 between the terminal groups D of two adjacent battery cell components 10, thereby increasing the size of the sampling component 20 and the thermal management component 30 by taking advantage of the larger size of the two adjacent second regions A2 in the second direction Y, so as to meet the spatial layout requirements of the sampling component 20 and the thermal management component 30.

[0100] Furthermore, for two adjacent battery cell assemblies 10, both adjacent battery cell assemblies 10 are connected and fixed to the thermal management assembly 30, which helps to improve the group rigidity of multiple battery cell assemblies 10, improve the expansion deformation of battery cell assemblies 10 in the first direction X, and improve the reliability of the battery device 100.

[0101] It should be noted that, depending on the actual needs, the thermal management component 30 and the sampling component 20 may or may not be provided on the same side of all terminal groups D in the second direction Y, or they may be provided. Figure 7 The diagram shows a configuration where the thermal management component 30 and the sampling component 20 are both located between terminal groups D of two adjacent battery cell assemblies 10, and both the thermal management component 30 and the sampling component 20 are located on the same side of all terminal groups D in the second direction Y.

[0102] In some embodiments, the battery device 100 further includes a busbar 40 electrically connected to the electrode terminal 111, and a sampling component 20 connected to the busbar 40; and / or, the battery cell 11 includes a housing 113, the electrode terminal 111 is disposed on the housing 113, and the sampling component 20 is connected to the housing 113.

[0103] The outer casing 113 protects the electrode assembly 114. Both the outer casing 113 and the electrode assembly 114 can have various shapes. Optionally, the shapes of the outer casing 113 and the electrode assembly 114 can match. For example, the outer casing 113 can be a square structure, and the electrode assembly 114 can also be a square structure. Alternatively, the outer casing 113 can be a cylindrical structure, and the electrode assembly 114 can also be a cylindrical structure.

[0104] Electrode terminals 111 are disposed on housing 113. Optionally, housing 113 includes wall portion 113a, and electrode terminals 111 are disposed on wall portion 113a. Further, housing 113 includes housing and end cap, and end cap is disposed to cover the opening of housing. Wall portion 113a can be end cap, or wall portion 113a can be part of the structure in housing.

[0105] The busbar component 40 is used to connect different electrode terminals 111 to meet the needs of series, parallel, or mixed connection of multiple battery cells 11. The busbar component 40 can be connected to the electrode terminals 111 by means of welding or other methods.

[0106] In this embodiment of the application, the sampling component 20 and the battery cell 11 have various connection relationships depending on the actual sampling needs. Specifically, the sampling component 20 can be connected to the housing 113 to realize the temperature sampling needs of the battery cell 11, or the sampling component 20 can also be connected to the busbar 40 to realize the voltage sampling needs of the battery cell 11. This helps to improve the flexibility between the sampling component 20 and the battery cell 11 and meet the actual needs of the battery device 100 under different circumstances.

[0107] In some alternative embodiments, the sampling component 20 is connected to the busbar 40 and the housing 113. In other words, the sampling component 20 performs both temperature and voltage sampling functions for the battery cell 11.

[0108] In some embodiments, please refer to Figure 6 The sampling component 20 is located at least partially on the side of the thermal management component 30 away from the battery cell 11. The thermal management component 30 has a clearance portion 33 that extends through the third direction Z. The sampling component 20 is partially located inside the clearance portion 33 and connected to the housing 113.

[0109] The sampling component 20 is at least partially located on the side of the thermal management component 30 opposite to the battery cell 11, meaning that the sampling component 20 covers at least a portion of the structural arrangement in the thermal management component 30 in the third direction Z. Optionally, during the assembly of the battery device 100, the thermal management component 30 is first connected and fixed to the battery cell 11, and then the sampling component 20 is connected and fixed to the battery cell 11.

[0110] The sampling component 20 is connected to the housing 113 to sample the temperature of the battery cell 11. To facilitate the connection between the sampling component 20 and the housing 113, the thermal management component 30 is provided with a clearance portion 33, which extends through the housing in a third direction Z, allowing the sampling component 20 to penetrate into the clearance portion 33 and connect with the housing 113. Optionally, the sampling component 20 includes a second sampling portion 23, which is at least partially located within the clearance portion 33 and connected to the housing 113.

[0111] The clearance portion 33 can take many forms. For example, the clearance portion 33 can be a through hole structure and be spaced apart from the edge of the thermal management component 30 in the second direction Y. Alternatively, the clearance portion 33 can be formed by the edge of the thermal management component 30 in the second direction Y that is recessed inward, as long as the clearance portion 33 can penetrate the thermal management component 30 in the third direction Z.

[0112] In this embodiment, the sampling component 20 is at least partially located on the side of the thermal management component 30 away from the battery cell 11. The thermal management component 30 can provide some support and load-bearing for the sampling component 20, enhancing its structural reliability. Furthermore, the thermal management component 30 is closer to the battery cell 11, thereby improving its temperature regulation effect on the battery cell 11. Additionally, the thermal management component 30 is provided with a clearance portion 33, through which the sampling component 20 can connect to the housing 113. This reduces the adverse effects of the thermal management component 30 on the connection between the sampling component 20 and the housing 113, improving both the energy density of the battery device 100 and the operational reliability of both the thermal management component 30 and the sampling component 20.

[0113] In some embodiments, such as Figure 6 As shown, the thermal management component 30 includes a heat-conducting element 32 and a heat exchanger 31 located on the side of the heat-conducting element 32 away from the battery cell assembly 10. The heat exchanger 31 is provided with a flow channel for the flow of heat exchange medium. In the projection plane perpendicular to the third direction Z, the positive projection area of ​​the heat-conducting element 32 is larger than the positive projection area of ​​the heat exchanger 31.

[0114] The heat exchanger 31 is the core component in the thermal management assembly 30 for temperature regulation. The heat exchanger 31 has a hollow structure and is provided with flow channels for the heat exchange medium. Optionally, the heat exchanger 31 includes a water-cooled pipe, and the heat exchange medium may include an ethylene glycol solution. The heat conductor 32 is a component in the thermal management assembly 30 used for heat transfer. The heat conductor 32 is located between the heat exchanger 31 and the battery cell assembly 10, and the heat conductor 32 can be used for connection and fixation between the battery cell assemblies 10 using thermally conductive adhesive.

[0115] In this embodiment, considering that the tubular structure corresponding to the heat exchanger 31 has a smaller size than the battery cell assembly 10, a heat-conducting element 32 is provided between the battery cell assembly 10 and the heat exchanger 31, and the projected area of ​​the heat-conducting element 32 is set to be larger than the projected area of ​​the heat exchanger 31. In this way, the uniformity of temperature distribution on the battery cell assembly 10 is improved by means of the heat-conducting element 32. This design can enhance the temperature regulation effect of the thermal management component 30 on the battery cell assembly 10.

[0116] In some alternative embodiments, the heat-conducting element 32 has a plate-like structure, extending in a first direction X and extending beyond the heat exchanger 31 in a second direction Y. Further optionally, the heat-conducting element 32 includes a heat spreader made of metal. Further optionally, the thermal conductivity of the heat-conducting element 32 is greater than that of the heat exchanger 31.

[0117] It should be noted that the thermal management component 30 may include multiple heat-conducting elements 32. In a projection plane perpendicular to the third direction Z, the orthographic projections of the multiple heat-conducting elements 32 at least partially coincide with the orthographic projections of the multiple sampling components 20. As for the heat exchanger 31, the thermal management component 30 may include only one heat exchanger 31. The heat exchanger 31 may extend in a serpentine shape and be connected and fixedly disposed with the multiple heat-conducting elements 32.

[0118] For cases where the thermal management component 30 and the pressure relief mechanism 112 are located on the same side of the battery cell 11, and both are situated between the two terminal groups D of the single battery cell assembly 10, optionally, two heat-conducting elements 32 may be included between the two terminal groups D of the single battery cell assembly 10. These two heat-conducting elements 32 are spaced apart in the second direction Y to allow the thermal management component 30 to avoid the pressure relief mechanism 112. Alternatively, alternatively, only one heat-conducting element 32 may be provided, and this element 32 may include a clearance hole extending along the third direction Z, corresponding to the pressure relief mechanism 112. This also allows the thermal management component 30 to avoid the pressure relief mechanism 112, meeting the pressure relief performance requirements of the battery device 100.

[0119] Furthermore, this application provides a solution where the heat exchanger 31 forms the flow channel solely by its own enclosure. In other embodiments, the flow channel can also be formed by the heat exchanger 31 and the heat-conducting element 32 together. Specifically, the heat exchanger 31 includes a groove structure with an opening facing the heat-conducting element 32. The heat-conducting element 32 covers the opening, thereby forming the flow channel together with the heat-conducting element 32.

[0120] In some embodiments, such as Figure 6 As shown, the sampling component 20 is connected to the heat exchanger 31 on the side opposite to the battery cell assembly 10; or as... Figure 4 As shown, the sampling component 20 is connected between the heat-conducting component 32 and the battery cell assembly 10.

[0121] In this embodiment, whether the sampling component 20 is connected to the side of the heat exchanger 31 away from the battery cell assembly 10, or connected between the heat conductor 32 and the battery cell assembly 10, the connection between the sampling component 20 and the thermal management component 30 can be achieved. This helps improve the relative positional reliability between the sampling component 20 and the thermal management component 30, reduces the risk of relative displacement between them, and this design does not affect the connection between the heat exchanger 31 and the heat conductor 32, thus meeting the fabrication requirements of the thermal management component 30. Furthermore, the sampling component 20 can also sample the temperature of the thermal management component 30, thereby matching and adjusting the flow rate and temperature of the heat exchange medium based on the obtained temperature information of the outer shell 113 and the temperature information of the thermal management component 30, thereby achieving real-time control and improving the control accuracy of the battery cell 11 temperature regulation.

[0122] In some embodiments, such as Figure 3 and Figure 6As shown, the sampling component 20 is connected to the side of the heat exchanger 31 away from the battery cell assembly 10. The sampling component 20 includes a body portion 21 extending along a first direction X and a first sampling portion 22 connected to the body portion 21. The body portion 21 is located on the side of the heat exchanger 32 away from the battery cell assembly 10. The first sampling portion 22 includes a first sub-part 221 and a second sub-part 222. The two ends of the first sub-part 221 are bent and connected to the second sub-part 222 and the body portion 21 in a third direction Z. The second sub-part 222 is connected to the heat exchanger 31 and detects the temperature of the heat exchanger 31.

[0123] The main body 21 is a major component of the sampling assembly 20, and the first sampling part 22 is a portion of the sampling assembly 20 used for connection with the thermal management assembly 30. Optionally, the main body 21 may include at least one of a flexible printed circuit board (FPC), a printed circuit board (PCB), and a flexible flat cable (FFC), while the first sampling part 22 may include a nickel strip structure.

[0124] The first sampling section 22 includes a first sub-section 221 and a second sub-section 222 that are bent and connected. The first sub-section 221 is used to realize the connection between the second sub-section 222 and the main body section 21. The first sub-section 221 is located on one side of the heat exchanger 31 along the second direction Y, and the second sub-section 222 is located on the side of the heat exchanger 31 opposite to the battery cell assembly 10, and the second sub-section 222 is connected to the heat exchanger 31.

[0125] It should be noted that the first sampling unit 22 can have various forms. For example, the sampling component 20 may include only one first sampling unit 22, and the first sampling unit 22 and the main body 21 may have the same size in the first direction X. Alternatively, multiple first sampling units 22 may be provided, and multiple first sampling units 22 may be arranged at intervals in the first direction X.

[0126] In this embodiment, within the projection plane perpendicular to the third direction Z, the orthographic projection of the main body 21 overlaps with the orthographic projection of the heat-conducting component 32, and the orthographic projection of the first sampling part 22 overlaps with the orthographic projection of the heat exchanger 31. This design reduces the impact of the sampling component 20 on the size of the thermal management component 30 in the second direction Y, thereby increasing the size of the thermal management component 30 in the second direction Y and enhancing the temperature regulation effect of the thermal management component 30 on the battery cell 11. Furthermore, this design positions the sampling component 20 on the side of the thermal management component 30 away from the battery cell assembly 10, so the presence of the sampling component 20 does not affect the heat transfer between the thermal management component 30 and the battery cell assembly 10, which also helps to enhance the temperature regulation effect of the thermal management component 30 on the battery cell 11.

[0127] In some optional embodiments, the sampling assembly 20 further includes a second sampling section 23 and a third sampling section 24, which are connected to the side of the body 21 away from the first sampling section 22 in the second direction Y. The second sampling section 23 is connected to the housing 113 to sample the temperature of the battery cell 11, while the third sampling section 24 is connected to the busbar 40 to sample the voltage.

[0128] In some embodiments, a plurality of first sampling units 22 are spaced apart in the first direction X and connected to the same body unit 21.

[0129] In this embodiment, the multiple first sampling units 22 can be connected to the thermal management component 30 at different locations to improve the relative positional reliability between the sampling component 20 and the thermal management component 30. The multiple first sampling units 22 can also be used to collect the temperature of different regions of the thermal management component 30 in the first direction X. By acquiring the temperature information from multiple regions, parameters such as the flow rate of the heat exchange medium can be further adjusted, thereby helping to enhance the control accuracy of the temperature corresponding to the battery cell 11.

[0130] In some embodiments, such as Figure 6 As shown, the battery cell 11 includes a housing 113 and an electrode assembly 114 located within the housing 113. The housing 113 includes a wall 113a, and electrode terminals 111 are disposed on the wall 113a and protrude from the side of the wall 113a opposite to the electrode assembly 114. The battery device 100 also includes a busbar 40 connected to the side of the electrode terminals 111 opposite to the electrode assembly 114. Along the third direction Z, at least a portion of the sampling assembly 20 is located between the wall 113a and the busbar 40; and / or, at least a portion of the thermal management assembly 30 is located between the wall 113a and the busbar 40.

[0131] Referring to the accompanying drawings, for the sampling assembly 20, optionally, a portion of the structure of the body portion 21 and a portion of the structure of the second sampling portion 23 may be located between the wall portion 113a and the confluence member 40. For the thermal management assembly 30, a portion of the structure of the heat-conducting element 32 may be located between the wall portion 113a and the confluence member 40. Further optionally, along the third direction Z, at least a portion of the sampling assembly 20 is located between the wall portion 113a and the confluence member 40, and at least a portion of the structure of the thermal management assembly 30 is located between the wall portion 113a and the confluence member 40. In this embodiment, a gap exists between the busbar 40 and the wall 113a in the third direction Z. At least one of the thermal management component 30 and the sampling component 20 can extend into this gap, thereby improving space utilization and increasing the energy density of the battery device 100. Furthermore, the sampling component 20 can be positioned closer to the busbar 40 to facilitate voltage sampling. The thermal management component 30 can have a larger size in the second direction Y, thereby improving temperature regulation of the battery cells 11 and enhancing the reliability of the battery device 100.

[0132] Secondly, embodiments of this application provide an electrical device, which includes the battery device 100 in any of the foregoing embodiments.

[0133] It should be noted that the power device provided in this application embodiment has the beneficial effects of the battery device 100 in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the battery device 100. This application embodiment will not repeat the description.

[0134] According to some embodiments of this application, please refer to Figure 2 , Figure 3 , Figure 5 as well as Figure 6 The battery device 100 includes a battery cell assembly 10, a sampling assembly 20, and a thermal management assembly 30. The battery cell assembly 10 includes a plurality of battery cells 11 arranged along a first direction X. Each battery cell 11 includes an electrode terminal 111. Two electrode terminals 111 in the battery cell 11 are arranged side by side in a second direction Y, and the electrode terminals 111 are located on one side of the battery cell 11 in a third direction Z. The plurality of electrode terminals 111 arranged side by side in the first direction X in the battery cell assembly 10 form a terminal group D. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0135] The thermal management component 30 is located along the third direction Z on the side of the battery cell 11 where the electrode terminals 111 are located, and is arranged side by side with the electrode terminals 111 in the second direction Y. The sampling component 20 is located along the third direction Z on the side of the battery cell 11 where the electrode terminals 111 are located, and in a projection plane perpendicular to the third direction Z, the orthographic projection of the thermal management component 30 and the orthographic projection of the sampling component 20 at least partially overlap. Both the sampling component 20 and the thermal management component 30 are located between the two terminal groups D of the single battery cell assembly 10.

[0136] The battery cell 11 also includes a pressure relief mechanism 112, which is located between the two electrode terminals 111 of the battery cell 11. In a projection plane perpendicular to the third direction Z, the orthographic projection of at least a portion of the pressure relief mechanism 112 is outside the orthographic projection of the thermal management assembly 30. The battery device 100 also includes a busbar 40, which is electrically connected to the electrode terminals 111. The sampling assembly 20 is connected to the busbar 40. The battery cell 11 includes a housing 113, the electrode terminals 111 are disposed in the housing 113, and the sampling assembly 20 is connected to the housing 113.

[0137] The sampling component 20 is located at least partially on the side of the thermal management component 30 away from the battery cell 11. The thermal management component 30 has a clearance portion 33 that extends through the third direction Z. The sampling component 20 is partially located within the clearance portion 33 and connected to the housing 113.

[0138] The thermal management component 30 includes a heat-conducting element 32 and a heat exchanger 31 located on the side of the heat-conducting element 32 away from the battery cell assembly 10. The heat exchanger 31 is provided with a flow channel for the flow of the heat exchange medium. In the projection plane perpendicular to the third direction Z, the projected area of ​​the heat-conducting element 32 is larger than the projected area of ​​the heat exchanger 31. The sampling component 20 is connected to the side of the heat exchanger 31 away from the battery cell assembly 10.

[0139] The sampling assembly 20 includes a body portion 21 extending along a first direction X and a first sampling portion 22 connected to the body portion 21. The body portion 21 is located on the side of the heat exchanger opposite to the battery cell 11. The first sampling portion 22 includes a first sub-part 221 and a second sub-part 222. The first sub-part 221 is bent at both ends in a third direction Z and connected to the second sub-part 222 and the body portion 21. The second sub-part 222 is connected to the heat exchanger 31 and detects the temperature of the heat exchanger 31.

[0140] The housing 113 includes a wall portion 113a, and an electrode terminal 111 is disposed on the wall portion 113a and protrudes from the side surface of the wall portion 113a opposite to the electrode assembly 114. The battery device 100 also includes a busbar member 40 connected to the side of the electrode terminal 111 opposite to the electrode assembly 114. Along the third direction Z, at least a portion of the structure in the sampling assembly 20 is located between the wall portion 113a and the busbar member 40, and at least a portion of the structure in the thermal management assembly 30 is located between the wall portion 113a and the busbar member 40.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising a plurality of battery cells arranged along a first direction, each battery cell including an electrode terminal, two of the electrode terminals of the battery cell being arranged side by side in a second direction, and the electrode terminals being located on one side of the battery cell in a third direction, wherein the first direction, the second direction, and the third direction intersect each other. A thermal management component is located on the side of the battery cell where the electrode terminal is located along the third direction, and is arranged side by side with the electrode terminal in the second direction; The sampling component is located on the side of the battery cell where the electrode terminals are located along the third direction. In a projection plane perpendicular to the third direction, the orthographic projection of the thermal management component and the orthographic projection of the sampling component at least partially overlap.

2. The battery device according to claim 1, characterized in that, In the battery cell assembly, a plurality of electrode terminals arranged side by side in the first direction form a terminal group, and the sampling component and the thermal management component are both located between two terminal groups of a single battery cell assembly.

3. The battery device according to claim 2, characterized in that, The battery cell also includes a pressure relief mechanism located between two electrode terminals of the battery cell. In a projection plane perpendicular to the third direction, the orthographic projection of at least a portion of the pressure relief mechanism is located outside the orthographic projection of the thermal management component.

4. The battery device according to claim 1, characterized in that, Multiple battery cell assemblies are arranged side by side in a second direction. Multiple electrode terminals arranged side by side in the first direction in the battery cell assembly form a terminal group. The sampling component and the thermal management component are both located between the terminal groups of two adjacent battery cell assemblies.

5. The battery device according to claim 1, characterized in that, It also includes a busbar component, which is electrically connected to the electrode terminals, and the sampling component is connected to the busbar component; And / or, the battery cell includes a housing, the electrode terminals are disposed on the housing, and the sampling component is connected to the housing.

6. The battery device according to claim 5, characterized in that, The sampling component is at least partially located on the side of the thermal management component away from the battery cell. The thermal management component has a clearance portion that extends through the third direction. The sampling component is partially located within the clearance portion and connected to the housing.

7. The battery device according to any one of claims 1 to 6, characterized in that, The thermal management component includes a heat-conducting element and a heat exchanger located on the side of the heat-conducting element away from the battery cell assembly. The heat exchanger is provided with a flow channel for the flow of heat exchange medium. In a projection plane perpendicular to the third direction, the projected area of ​​the heat-conducting element is larger than the projected area of ​​the heat exchanger.

8. The battery device according to claim 7, characterized in that, The sampling component is connected to the side of the heat exchanger that is away from the battery cell assembly; or, the sampling component is connected between the heat-conducting component and the battery cell assembly.

9. The battery device according to claim 87, characterized in that, The sampling component is connected to the side of the heat exchanger that is away from the battery cell assembly. The sampling component includes a body extending along the first direction and a first sampling part connected to the body. The body is located on the side of the heat exchanger that is away from the battery cell. The first sampling unit includes a first sub-unit and a second sub-unit. The first sub-unit is bent at both ends in the third direction and connected to the second sub-unit and the main body. The second sub-unit is connected to the heat exchanger and detects the temperature of the heat exchanger.

10. The battery device according to claim 9, characterized in that, Multiple first sampling units are spaced apart in the first direction and connected to the same body unit.

11. The battery device according to any one of claims 1 to 10, characterized in that, The battery cell includes a housing and an electrode assembly located within the housing. The housing includes a wall portion, and the electrode terminals are disposed on the wall portion and protrude from the side surface of the wall portion opposite to the electrode assembly. The battery device also includes a busbar member connected to the side of the electrode terminals opposite to the electrode assembly. Along the third direction, at least a portion of the structure in the sampling assembly is located between the wall and the manifold; and / or, at least a portion of the structure in the thermal management assembly is located between the wall and the manifold.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 11.

Images