Battery device, energy storage device, energy storage system, electric device and charging network

Abstract

Disclosed are a battery device (100), an energy storage device (1), an energy storage system (1000), an electric device and a charging network (2000). The battery device (100) comprises: an energy unit (70), which comprises a housing (71) and a pouch battery cell (20), wherein the pouch battery cell (20) is located within the housing (71); the pouch battery cell (20) comprises a pouch casing (21), an electrode assembly, and an electrode lead-out portion (22), the electrode assembly being sealed within the pouch casing (21), the electrode lead-out portion (22) being at least partially located within the pouch casing (21) so as to be connected to the electrode assembly, and the end of the pouch casing (21) in a first direction being provided with a sealing portion (211) from which at least part of the electrode lead-out portion (22) is exposed; and an electrolyte collection structure (30), wherein the electrolyte collection structure (30) is correspondingly arranged at the end of the pouch battery cell (20) in the first direction within the energy unit (70), and the electrolyte collection structure (30) is located below the sealing portion (211).

Description

Battery devices, energy storage devices, energy storage systems, electrical devices and charging networks Technical Field

[0001] This application relates to the field of batteries, specifically to a battery device, an energy storage device, an energy storage system, an electrical device, and a charging network. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In related technologies, battery devices may include multiple pouch cell batteries. A pouch cell is a battery cell encapsulated in a flexible shell, typically using aluminum-plastic film as the shell material, and is characterized by its lightweight, thinness, and high energy density. However, for pouch cell batteries, the plastic-sealed areas at the tabs on both sides are weak points in the aluminum-plastic film shell, making them prone to breakage and leakage, posing a safety hazard. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device, energy storage device, energy storage system, power consumption device and charging network, which can alleviate the safety hazards caused by leakage when the plastic seal of the tab of a pouch battery cell is damaged.

[0005] In a first aspect, this application provides a battery device. The battery device includes:

[0006] An energy unit includes a housing and a pouch-shaped battery cell located within the housing. The pouch-shaped battery cell includes a pouch-shaped housing, an electrode assembly, and an electrode lead-out portion. The electrode assembly is encapsulated within the pouch-shaped housing, and the electrode lead-out portion is at least partially located within the pouch-shaped housing to connect to the electrode assembly. Furthermore, the pouch-shaped housing has an encapsulation portion at one end in a first direction, and at least a portion of the electrode lead-out portion is exposed from the encapsulation portion.

[0007] A liquid collecting structure is provided at the end of the pouch-shaped battery cell in the energy unit along the first direction, and the liquid collecting structure is located below the encapsulation portion.

[0008] In the technical solution of this application embodiment, the liquid collection structure is correspondingly disposed at the end of the pouch-shaped battery cell along the first direction in the energy unit and located below the encapsulation part. Thus, the liquid collection structure can collect the liquid leaked from the pouch-shaped battery cell due to damage to the encapsulation part, which can alleviate the impact caused by liquid leakage from the pouch-shaped battery cell to a certain extent, thereby improving the reliability and safety of the battery device.

[0009] In some embodiments, the electrode lead-out portion includes a first electrode lead-out portion and a second electrode lead-out portion, the first electrode lead-out portion and the second electrode lead-out portion being respectively located at both ends of the pouch-shaped battery cell along the first direction; the encapsulation portion includes a first encapsulation portion and a second encapsulation portion, the first encapsulation portion being correspondingly disposed with respect to the first electrode lead-out portion, and the first electrode lead-out portion being at least partially exposed from the first encapsulation portion; the second encapsulation portion being correspondingly disposed with respect to the second electrode lead-out portion, and the second electrode lead-out portion being at least partially exposed from the second encapsulation portion;

[0010] The liquid collection structure includes a first liquid collection structure and a second liquid collection structure. The first liquid collection structure corresponds to the first packaging part along the first direction and is located below the first packaging part. The second liquid collection structure corresponds to the second packaging part along the first direction and is located below the second packaging part.

[0011] In the above embodiments, the first liquid collection structure and the second liquid collection structure can collect the electrolyte leaked due to damage to the first and second encapsulation parts, which can, to a certain extent, avoid problems such as system-level short circuits, corrosion, and even battery failure and arcing, thereby improving the reliability and safety of the battery device.

[0012] In some embodiments, the energy unit includes a plurality of pouch-shaped battery cells placed in the housing, the housing having first openings on both sides along the first direction, the battery device further including two insulating members, the two insulating members respectively covering the first openings on both sides, and the first liquid collecting structure and the second liquid collecting structure respectively disposed on the two insulating members.

[0013] In the above embodiments, the first liquid collection structure and the second liquid collection structure can be respectively disposed on two insulating parts. When electrolyte leakage occurs in the first encapsulation part and the second encapsulation part, the electrolyte can be collected in time, which can avoid system-level short circuits, corrosion, and even battery failure and arcing to a certain extent, thereby improving the reliability and safety of the battery device.

[0014] In some embodiments, the battery device includes a housing, the housing further including a second opening toward the inner bottom wall of the housing, an insulating colloid between the pouch-shaped battery cell and the inner bottom wall of the housing, the insulating colloid at least partially penetrating through the second opening to insulate the pouch-shaped battery cell and the inner bottom wall of the housing, and the liquid collection structure including a liquid collection tank, the minimum distance between the bottom wall of the liquid collection tank and the inner bottom wall of the housing being less than the maximum distance between the upper surface of the insulating colloid and the inner bottom wall of the housing.

[0015] In the above embodiments, the minimum distance between the bottom wall of the collection tank and the bottom wall of the box is less than the maximum distance between the upper surface of the insulating colloid and the bottom wall of the box. When the electrolyte leaks, the electrolyte can eventually reach the lower-lying collection tank, thereby collecting the leaked electrolyte.

[0016] In some embodiments, the electrode lead-out portion includes a first electrode lead-out portion and a second electrode lead-out portion, the first electrode lead-out portion and the second electrode lead-out portion being spaced apart at a first end of the pouch-shaped battery cell along the first direction, the encapsulation portion includes a first encapsulation portion located at the first end, and both the first electrode lead-out portion and the second electrode lead-out portion are at least partially exposed from the first encapsulation portion;

[0017] The liquid collection structure includes a first liquid collection structure, which corresponds to the first encapsulation part along the first direction and is located below the first encapsulation part.

[0018] In the above embodiments, the first liquid collection structure can collect the electrolyte leaked due to damage to the first encapsulation part. That is, the first electrode lead and the second electrode lead can share the first liquid collection structure, which can avoid system-level short circuits, corrosion, and even battery failure and arcing to a certain extent. This improves the reliability and safety of the battery device while reducing the space requirement and material consumption of setting up multiple liquid collection structures, thus optimizing the space utilization of the battery device.

[0019] In some embodiments, the liquid collection structure includes a flow channel and a liquid storage section. The flow channel is located below the encapsulation section, and the liquid storage section is located on the side of the flow channel opposite to the pouch-shaped battery cell. The flow channel communicates with the liquid storage section.

[0020] In the above embodiments, by combining the guide channel and the liquid storage section, the liquid collection structure can more effectively guide and collect the electrolyte leaked when the pouch battery cell packaging is damaged. To a certain extent, it can prevent the electrolyte from spreading to other areas, improve the safety and reliability of the battery device, and optimize space utilization.

[0021] In some embodiments, the battery device includes a detection element, at least a portion of which is located within the liquid collection structure, the detection element being used to detect liquid within the liquid collection structure.

[0022] In the above embodiments, the detection element is at least partially located within the liquid collection structure and is used to detect the electrolyte within the liquid collection structure. This can ensure effective detection of electrolyte leakage to a certain extent and transmit the detection results to the control system or alarm system, thereby increasing the safety and reliability of the battery device.

[0023] In some embodiments, a plurality of the pouch-shaped battery cells are arranged along a second direction, and the liquid collection structure includes a confluence channel that extends along the second direction to be located below the encapsulation portion of the plurality of pouch-shaped battery cells, wherein the second direction is perpendicular to the first direction.

[0024] In the above embodiments, the busbar extends along the second direction and is located below the encapsulation portion of multiple pouch-shaped battery cells, which can form a battery cell module to improve the overall energy storage capacity of the battery device and meet energy demand. At the same time, the busbar can collect electrolyte leaked from the module, which can prevent electrolyte from spreading to other areas to a certain extent and improve the safety and reliability of the battery device.

[0025] In some embodiments, the battery device includes a detection element, at least a portion of which is located within the manifold, the detection element being used to detect liquid within the manifold.

[0026] In the above embodiments, the detection element is at least partially located within the manifold channel to detect the electrolyte within the manifold channel. This can ensure effective detection of electrolyte leakage to a certain extent and transmit the detection results to the control system or alarm system, thereby increasing the safety and reliability of the battery device.

[0027] In some embodiments, the bottom wall of the confluence channel is provided with a recess, and the detection element is disposed in the recess.

[0028] In the above embodiments, the bottom wall of the manifold is provided with a recess, and the detection element is disposed in the recess, so that the leaked electrolyte can be concentrated in the recess, thereby enabling the detection element to detect the electrolyte more quickly and accurately.

[0029] In some embodiments, along the second direction, the bottom wall of at least one side of the recess is inclined toward the recess.

[0030] In the above embodiments, along the second direction, the bottom wall of at least one side of the recess is inclined toward the recess, which can guide the electrolyte to flow to the recess, thereby improving the electrolyte detection sensitivity and accelerating the response time to a certain extent, which helps to improve the overall safety and reliability of the battery device.

[0031] In some embodiments, the angle of inclination of the bottom wall of the recess on any side of the second direction toward the recess is R, where 0° < R ≤ 10°.

[0032] In the above embodiments, the tilt angle R satisfies 0° < R ≤ 10°, which can ensure the electrolyte collection efficiency under different leakage scenarios to a certain extent, thereby improving the safety and reliability of the battery device. At the same time, it can, to some extent, avoid the problem of a large thickness of the electrolyte collection structure in the third direction when the tilt angle is greater than 10°.

[0033] In some embodiments, 5° ≤ R ≤ 10°.

[0034] In the above embodiments, the tilt angle R satisfies 5°≤R≤10°, which allows the electrolyte to flow more quickly to the recess, reducing the time the liquid stays in the manifold and enabling rapid accumulation of leaked electrolyte. This, to a certain extent, improves the electrolyte detection sensitivity and accelerates the response time, contributing to the overall safety and reliability of the battery device. Simultaneously, it can, to some extent, avoid the problem of a larger thickness of the liquid collection structure in the third direction when the tilt angle is greater than 10°.

[0035] In some embodiments, the width of the merging channel is x, where 0.5cm ≤ x ≤ 3cm.

[0036] In the above embodiments, the width x of the manifold channel satisfies 0.5cm ≤ x ≤ 3cm, which can ensure the electrolyte collection efficiency under different leakage scenarios to a certain extent, thereby improving the safety and reliability of the battery device. At the same time, it can, to some extent, avoid the problem of a larger size of the electrolyte collection structure in the first direction when the width x of the manifold channel is greater than 3cm.

[0037] In some embodiments, 0.5 ≤ x ≤ 1 cm.

[0038] In the above embodiments, the width x of the manifold channel, satisfying 0.5 ≤ x ≤ 1 cm, provides a flow path for leaked electrolyte, while reducing space utilization and improving the compactness of the battery device. Simultaneously, it allows the electrolyte collection structure to occupy less space, further contributing to the compactness of the battery device.

[0039] In some embodiments, the depth of the confluence channel is h, where 0 < h ≤ 1 cm.

[0040] In the above embodiments, the depth h of the manifold satisfies 0 < h ≤ 1 cm, which can provide a flow path for the leaked electrolyte and, to a certain extent, ensure the collection efficiency of the electrolyte under different leakage scenarios, thereby improving the safety and reliability of the battery device.

[0041] In some embodiments, the battery device includes a battery management system electrically connected to the detection element, the detection element being configured to send an alarm signal to the battery management system when a liquid leak is detected.

[0042] In the above embodiments, the battery management system is electrically connected to the detection device. When the detection device detects electrolyte leakage, it can promptly provide alarm or feedback information to the battery management system, which is conducive to the battery management system taking timely safety measures, such as controlling the power outage of the bag-shaped battery cell that has electrolyte leakage (stopping charging, stopping discharging), etc.

[0043] In some embodiments, the battery device further includes a liquid-absorbing element located within the liquid collection structure.

[0044] In the above embodiments, the liquid absorption element is located in the liquid collection structure, which can ensure timely absorption of electrolyte to a certain extent when electrolyte leakage occurs in the battery device.

[0045] In some embodiments, the pouch-shaped battery cell is any one of a lithium iron phosphate battery cell, a ternary battery cell, and a solid-state battery cell.

[0046] In the above embodiments, in the embodiments of the present application constructed as lithium iron phosphate battery cells, the reliability of the pouch battery cells can be improved and the cycle life of the pouch battery cells can be extended. In the embodiments of the present application constructed as ternary lithium battery cells, the energy density of the pouch battery cells can be improved and the driving range can be increased. In the embodiments of the present application constructed as solid-state pouch battery cells, not only the energy density can be improved, but also the reliability can be improved.

[0047] Secondly, this application provides an energy storage device that includes a plurality of battery devices as described in any of the above embodiments, the battery devices being used to store or provide electrical energy.

[0048] Thirdly, this application provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0049] Fourthly, this application provides an electrical device that includes the battery device, energy storage device, or energy storage system described in the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0050] Fifthly, this application provides a charging network, which includes a charging pile and an energy storage device or energy storage system as described in the above embodiments, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0051] 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

[0052] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0053] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0054] Figure 2 is an exploded structural diagram of a battery device according to some embodiments of this application;

[0055] Figure 3 is a cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0056] Figure 3a is an enlarged view of part A in Figure 3;

[0057] Figure 4 is another cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0058] Figure 4a is an enlarged view of part B in Figure 4;

[0059] Figure 5 is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0060] Figure 6 is another structural schematic diagram of a battery device according to some embodiments of this application;

[0061] Figure 7 is a top view of a battery device according to some embodiments of this application;

[0062] Figure 8 is another top view of a battery device according to some embodiments of this application;

[0063] Figure 9 is another cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0064] Figure 9a is an enlarged view of part C in Figure 9;

[0065] Figure 10 is another cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0066] Figure 10a is an enlarged view of part D in Figure 10;

[0067] Figure 11 is another cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0068] Figure 12 is a schematic diagram of the structure of a pouch-shaped battery cell and a busbar channel according to some embodiments of this application;

[0069] Figure 13 is another structural schematic diagram of the pouch-shaped battery cell and the busbar channel of some embodiments of this application;

[0070] Figure 14 is a schematic diagram of the energy storage system according to some embodiments of this application;

[0071] Figure 15 is a schematic diagram of the modules of a charging network according to some embodiments of this application.

[0072] The reference numerals in the detailed embodiments are as follows: Vehicle 1000, energy storage system 2000, charging network 3000, energy storage device 1, power conversion device 2, power generation device 3, charging pile 4, connector 5; Battery device 100, controller 200, motor 300; Housing 10, first part 11, second part 12, inner bottom wall 13, thermal management component 14; Pouch-shaped battery cell 20, pouch-shaped shell 21, electrode lead-out part 22, encapsulation part 211, first electrode lead-out part 221, second electrode lead-out part 222, first encapsulation part 2111, second encapsulation part 2112; Liquid collection structure 30, confluence channel 31, liquid collection tank 32, guide channel 33, liquid storage part 34, recess 311, first liquid collection structure 301, second liquid collection structure 302; Insulating colloid 40; Detection element 50; Liquid absorption element 60; Energy unit 70, shell 71, first opening 72. Detailed Implementation

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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).

[0079] 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.

[0080] 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.

[0081] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0082] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0083] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used 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 power battery applications, market demand is also constantly increasing.

[0084] In electric vehicle applications, the structural design of the battery pack directly affects its lifespan and safety. A battery pack can include multiple pouch cell batteries. Compared to traditional hard-shell battery cells, pouch cells offer significant advantages in terms of light weight and high energy density, increasing vehicle range and reducing overall weight. However, pouch cells use an aluminum-plastic film as their outer casing, resulting in lower overall mechanical strength and greater structural fragility during use.

[0085] In practical use, the inventors discovered that the plastic-sealed areas of the tabs on both sides of the pouch battery cell are weak points in the cell's structure. These areas are not only prone to damage or cracking due to concentrated mechanical stress, but may also lead to liquid leakage from the cell. Liquid leakage can further cause system short circuits, corrosion of connecting components, and even battery failure or fire, seriously affecting the safety and lifespan of electric vehicles.

[0086] Based on the above considerations, in order to alleviate the safety hazards caused by leakage when the plastic seal of the tab of the pouch battery cell 20 is damaged, this application provides a liquid collection structure 30. The liquid collection structure 30 can collect, guide and isolate the leaked liquid from the pouch battery cell 20, thereby reducing the probability of the leaked liquid coming into contact with other electronic components or connecting parts inside the battery device 100, and further improving the safety and reliability of the battery system.

[0087] The pouch-shaped battery cells of this application can be applied to a battery device 100. The battery device 100 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 pouch-shaped battery cells 20, which are connected in series, parallel, or mixed connection via a busbar. Mixed connection refers to multiple pouch-shaped battery cells 20 being connected in both series and parallel connections.

[0088] In some embodiments, a battery cell assembly is typically formed by arranging a plurality of pouch-shaped battery cells 20.

[0089] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple pouch-shaped battery cells 20 into a single module. As an example, the battery module can also be formed by bundling multiple pouch-shaped battery cells 20 together with cable ties.

[0090] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more individual battery cells housed within the housing 10.

[0091] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0092] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple pouch-shaped battery cells 20 to the housing 10.

[0093] As an example, referring to Figure 2, the housing 10 may include a first part 11 and a second part 12. The first part 11 and the second part 12 are fastened together to form a closed space inside the housing 10 to accommodate the battery cell assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first part 11 may be a top cover or a bottom plate.

[0094] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to accommodate the battery cell assembly.

[0095] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0096] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use pouch-shaped battery cells 20, 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.

[0097] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to one embodiment of this application.

[0098] It should be noted that the liquid collection structure 30 in this embodiment can collect liquid leaked from the pouch cell 20. The liquid can be electrolyte, solvent between the separators, battery additive solution, or other liquids within the pouch cell 20. For ease of explanation, the following embodiments use electrolyte as an example from one embodiment of this application.

[0099] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments 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 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0100] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0101] In the battery device 100, there can be multiple housings 71. Within each housing 71, there can be multiple pouch-shaped battery cells 20. These pouch-shaped battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that some of the pouch-shaped battery cells 20 are connected in series while others are connected in parallel. The multiple pouch-shaped battery cells 20 can be directly connected in series, parallel, or in a mixed configuration together, and the entire assembly of the multiple pouch-shaped battery cells 20 is housed within the housing 71. The multiple pouch-shaped battery cells 20 within the multiple housings 71 can then be connected in series, parallel, or in a mixed configuration to form a whole, which is housed within the casing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple pouch-shaped battery cells 20.

[0102] In this embodiment, the pouch cell 20 can be a secondary battery. A secondary battery refers to a pouch cell 20 that can be recharged to activate the active material and continue to be used after it has been discharged.

[0103] The pouch-shaped battery cell 20 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.

[0104] According to some embodiments of this application, referring to Figures 3 to 11, this application provides a battery device 100. The battery device 100 includes an energy unit 70 and a liquid collecting structure 30. The energy unit 70 includes a housing 71 and a pouch-shaped battery cell 20, the pouch-shaped battery cell 20 being located within the housing 71. The pouch-shaped battery cell 20 includes a pouch-shaped housing 21, an electrode assembly, and an electrode lead-out portion 22. The electrode assembly is encapsulated within the pouch-shaped housing 21, and the electrode lead-out portion 22 is at least partially located within the pouch-shaped housing 21 for connection to the electrode assembly. The pouch-shaped housing 21 has an encapsulation portion 211 at its end in a first direction (F1), and at least a portion of the electrode lead-out portion 22 protrudes from the encapsulation portion 211. The liquid collecting structure 30 is correspondingly provided at the end of the pouch-shaped battery cell 20 in the energy unit 70 along the first direction, and the liquid collecting structure 30 is located below the encapsulation portion 211.

[0105] Specifically, the pouch-shaped housing 21 is the external encapsulation structure of the pouch-shaped battery cell 20. Optionally, the pouch-shaped housing 21 can be made of multilayer composite material, such as aluminum-plastic film. The pouch-shaped battery cell 20 may include an encapsulation portion 211, which is located at the end of the pouch-shaped housing 21 in a first direction. The encapsulation portion 211 may have pre-formed openings, perforations, slots, or channels so that at least a portion of the electrode lead 22 can be exposed from the encapsulation portion 211 and connected to an external circuit. The electrode lead 22 and the encapsulation portion 211 can be connected by heat sealing or adhesive bonding to seal the pouch-shaped battery cell 20.

[0106] The electrode assembly is the part of the pouch cell 20 responsible for electrochemical reactions, enabling the storage and release of electrical energy. The electrode assembly may include a positive electrode, a negative electrode, an electrolyte, and a separator. The positive electrode may be constructed by coating an aluminum foil current collector with a positive electrode active material (such as lithium nickel cobalt manganese oxide, lithium iron phosphate, etc.), and the negative electrode may be constructed by coating a copper foil current collector with a negative electrode active material (such as graphite, silicon carbon, etc.). The electrolyte is a liquid or gel-like substance filled within the electrode assembly, providing ion conduction channels. The separator may be placed between the positive and negative electrodes to prevent direct contact between them, which could lead to a short circuit, while allowing ions to move freely within the electrolyte.

[0107] The electrode lead-out portion 22 is the electrical connection terminal between the pouch battery cell 20 and the external circuit, responsible for transmitting the electrical energy inside the pouch battery cell 20 to the external device. The electrode lead-out portion 22 may include a positive electrode lead-out portion and a negative electrode lead-out portion, which are respectively connected to the positive and negative electrodes in the electrode assembly.

[0108] Referring further to Figures 3 to 4a and Figures 9 to 11, the liquid collecting structure 30 is located at the end of the pouch-shaped battery cell 20 in the energy unit 70 along the first direction, and is situated below the encapsulation part 211. The encapsulation part 211 is where the electrode lead-out part 22 is installed, and there is a phenomenon of local stress concentration in the material, resulting in low mechanical strength. Under long-term use or changes in the external environment, material aging, deformation, or sealing failure may occur, leading to electrolyte leakage, causing system-level short circuits, corrosion, or even battery failure and sparking.

[0109] The liquid collection structure 30 is located at the end of the pouch-shaped battery cell 20 in the energy unit 70 along the first direction and below the encapsulation part 211. It can collect the electrolyte leaked from the pouch-shaped battery cell 20 due to damage to the encapsulation part 211. To a certain extent, it can avoid problems such as system-level short circuits, corrosion, and even battery failure and arcing, thereby improving the reliability and safety of the battery device 100.

[0110] Optionally, according to some embodiments of this application, referring to Figures 4, 4a, 10, and 10a, the electrode lead-out portion 22 includes a first electrode lead-out portion 221 and a second electrode lead-out portion 222. The first electrode lead-out portion 221 and the second electrode lead-out portion 222 are respectively located at both ends of the pouch cell 20 along a first direction. The encapsulation portion 211 includes a first encapsulation portion 2111 and a second encapsulation portion 2112. The first encapsulation portion 2111 is correspondingly disposed to the first electrode lead-out portion 221, and the first electrode lead-out portion 221 is at least partially exposed from the first encapsulation portion 2111. The second encapsulation portion 2112 is correspondingly disposed to the second electrode lead-out portion 222, and the second electrode lead-out portion 222 is at least partially exposed from the second encapsulation portion 2112. The liquid collection structure 30 includes a first liquid collection structure 301 and a second liquid collection structure 302. The first liquid collection structure 301 corresponds to the first encapsulation portion 2111 along the first direction and is located below the first encapsulation portion 2111. The second liquid collection structure 302 corresponds to the second encapsulation part 2112 along the first direction and is located below the second encapsulation part 2112.

[0111] The pouch-shaped housing 21 of the pouch-shaped battery cell 20 has a first encapsulation portion 2111 and a second encapsulation portion 2112 at both ends in a first direction. The first encapsulation portion 2111 and the second encapsulation portion 2112 may have openings, holes, slots or channels so that the first electrode lead-out portion 221 can be exposed from the first encapsulation portion 2111 and connected to an external circuit, and the second electrode lead-out portion 222 can be exposed from the second encapsulation portion 2112 and connected to an external circuit.

[0112] Correspondingly, the liquid collecting structure 30 includes a first liquid collecting structure 301 and a second liquid collecting structure 302. The first liquid collecting structure 301 is disposed below the first encapsulation portion 2111 along a first direction, and is used to collect electrolyte leaked due to damage to the first encapsulation portion 2111. The second liquid collecting structure 302 is disposed below the second encapsulation portion 2112 along the first direction, and is used to collect electrolyte leaked due to damage to the second encapsulation portion 2112.

[0113] It is understood that in this embodiment, the first electrode lead-out portion 221 and the second electrode lead-out portion 222 are respectively connected to the positive and negative electrodes of the electrode assembly and are located at both ends of the pouch cell 20 along the first direction. This can shorten the current path, reduce the internal resistance, thereby improving the energy efficiency and power output of the pouch cell 20, while also helping to disperse heat and improve the thermal management performance of the pouch battery.

[0114] The first liquid collecting structure 301 and the second liquid collecting structure 302 can collect the electrolyte leaked due to damage to the first encapsulation part 2111 and the second encapsulation part 2112. To a certain extent, this can avoid problems such as system-level short circuits, corrosion, and even battery failure and sparking, thereby improving the reliability and safety of the battery device 100.

[0115] Optionally, according to some embodiments of this application, referring to Figures 5 to 8, the energy unit 70 includes a plurality of pouch-shaped battery cells 20 placed in a housing 71. The housing 71 has first openings 72 on both sides along a first direction. The battery device 100 also includes two insulating members (not shown), which respectively cover the first openings 72 on both sides. A first liquid collecting structure 301 and a second liquid collecting structure 302 are respectively disposed on the two insulating members.

[0116] Optionally, in one embodiment, the energy unit 70 may include a housing 71 and a plurality of pouch-shaped battery cells 20 disposed within the housing 71. In one embodiment, the energy unit 70 may include a plurality of housings 71, each housing 71 being able to hold a plurality of pouch-shaped battery cells 20.

[0117] It is understood that the housing 71 is a direct housing structure for the pouch-shaped battery cell 20, and its interior forms a receiving cavity for housing and protecting the pouch-shaped battery cell 20. The housing 71 provides support and protection, preventing the pouch-shaped battery cell 20 from being damaged by direct collision with other components inside the housing 10. The material of the housing 71 may include, but is not limited to, metallic materials.

[0118] The housing 71 has first openings 72 on both sides along the first direction. The first openings 72 allow the electrode leads 22 to protrude from the housing 71, facilitating electrical connection between the electrode leads 22 and external circuits or busbars. A busbar, also known as a busbar, current bus, or current bus, is a metal conductor component used for electrical connections, typically in battery modules, power systems, or electronic devices to connect multiple circuits or battery cells together, thereby achieving current transmission and merging functions.

[0119] Since the adapter bar typically connects to multiple pouch-shaped battery cells 20 or electrical devices, if the adapter bar is exposed to the outside without insulation protection, it may come into contact with other electrical components, metal structures, or conductive materials, causing current to flow through unintended paths. Therefore, the battery device 100 also includes two insulating elements that effectively isolate the adapter bar from the external environment, preventing current from flowing through unintended paths to a certain extent. The insulating elements include, but are not limited to, plastic brackets, which can be used to support and fix the position of the adapter bar while isolating it from the external environment.

[0120] After the electrode lead-out portion 22 protrudes from the first opening 72 of the housing 71, it can be connected to the adapter plate to realize the functions of current transmission and current collection. An insulating member can cover the first opening 72 to isolate the adapter plate from the external environment.

[0121] The first liquid collecting structure 301 and the second liquid collecting structure 302 can be respectively disposed on two insulating parts. When electrolyte leakage occurs in the first encapsulation part 2111 and the second encapsulation part 2112, the electrolyte can be collected in time, which can avoid system-level short circuits, corrosion, and even battery failure and arcing to a certain extent, thereby improving the reliability and safety of the battery device 100.

[0122] Optionally, according to some embodiments of this application, referring to Figures 3 to 4a, the battery device 100 includes a housing 10. The housing 71 also includes a second opening (not shown) facing the inner bottom wall 13 of the housing 10. An insulating adhesive 40 is provided between the pouch-shaped battery cell 20 and the inner bottom wall 13 of the housing 10, the insulating adhesive 40 at least partially penetrating the second opening to insulate the pouch-shaped battery cell 20 and the inner bottom wall 13 of the housing 10. The liquid collection structure 30 includes a liquid collection tank 32, the minimum distance between the bottom wall of the liquid collection tank 32 and the inner bottom wall 13 of the housing 10 being less than the maximum distance between the upper surface of the insulating adhesive 40 and the inner bottom wall 13 of the housing 10.

[0123] The housing 10 is the main protective and containment structure of the entire battery device 100. It provides protection and can, to a certain extent, prevent external forces from directly affecting the interior of the battery device 100. The housing 10 has an inner bottom wall 13. The inner bottom wall 13 can support the pouch-shaped battery cells 20 and provide a stable structural foundation for the battery device 100.

[0124] The housing 71 includes a second opening facing the inner bottom wall 13 of the casing 10, that is, the housing 71 has a second opening along a third direction (F3) and facing the inner bottom of the casing 10. The pouch-shaped battery cell 20 can be placed inside the housing 71 through the second opening. The third direction is perpendicular to the first direction. In the embodiment shown in the figure, the first direction is horizontal, the third direction is vertical, and the inner bottom wall 13 refers to the inner surface of the bottom of the casing 10. In one embodiment, the electrical device is a vehicle 1000. The first direction may correspond to the front-rear or left-right direction of the vehicle 1000, and the third direction may correspond to the up-down direction of the vehicle 1000.

[0125] The pouch-shaped battery cell 20 and the inner bottom wall 13 of the housing 10 can be connected by an insulating adhesive 40. The portion of the insulating adhesive 40 facing the pouch-shaped battery cell 20 has a second opening to connect to the pouch-shaped battery cell 20 located inside the housing 71, and the portion facing the inner bottom wall 13 of the housing 10 connects to the inner bottom wall 13 of the housing 10, thereby securing the pouch-shaped battery cell 20. The insulating adhesive 40 may include, but is not limited to, thermally conductive adhesive, structural adhesive, AB glue, or black glue.

[0126] The liquid collection structure 30 includes a liquid collection tank 32. The minimum distance N between the bottom wall of the liquid collection tank 32 and the inner bottom wall 13 of the housing 10 is less than the maximum distance M between the upper surface of the insulating colloid 40 and the inner bottom wall 13 of the housing 10. That is, in the third direction, the bottom wall of the liquid collection tank 32 is closer to the inner bottom wall 13 of the housing 10 than the upper surface of the insulating colloid 40. Since the upper surface of the insulating colloid 40 is connected to the pouch-shaped battery cell 20, the bottom wall of the liquid collection tank 32 is closer to the inner bottom wall 13 of the housing 10 than the lower surface of the pouch-shaped battery cell 20.

[0127] Understandably, the bottom wall of the collection tank 32 is closer to the inner bottom wall 13 of the box 10 than the lower surface of the bag-shaped battery cell 20. When the electrolyte leaks, the liquid flows into the collection tank 32 under the action of gravity, so that the electrolyte can be effectively concentrated at the bottom of the collection tank 32, thereby ensuring the effectiveness of the collection structure 30 to a certain extent.

[0128] The minimum distance between the bottom wall of the collection tank 32 and the inner bottom wall 13 of the box 10 is less than the maximum distance between the upper surface of the insulating colloid 40 and the inner bottom wall 13 of the box 10. When the electrolyte leaks, the electrolyte can eventually reach the lower-lying collection tank 32, thereby collecting the leaked electrolyte.

[0129] According to some embodiments of this application, optionally, the electrode lead-out portion 22 includes a first electrode lead-out portion 221 and a second electrode lead-out portion 222. The first electrode lead-out portion 221 and the second electrode lead-out portion 222 are spaced apart at a first end of the pouch cell 20 along a first direction. The encapsulation portion 211 includes a first encapsulation portion 2111 located at the first end. Both the first electrode lead-out portion 221 and the second electrode lead-out portion 222 have at least a portion exposed from the first encapsulation portion 2111. The liquid collecting structure 30 includes a first liquid collecting structure 301. The first liquid collecting structure 301 corresponds to the first encapsulation portion 2111 along the first direction and is located below the first encapsulation portion 2111.

[0130] The pouch-shaped housing 21 of the pouch-shaped battery cell 20 has a first encapsulation portion 2111 at one end in a first direction. The first encapsulation portion 2111 may have an opening, aperture, slot, or channel so that the first electrode lead 221 and the second electrode lead 222 can be exposed from the first encapsulation portion 2111 and connected to an external circuit. The first electrode lead 221 and the second electrode lead 222 are insulated from the first encapsulation portion 2111.

[0131] Correspondingly, the liquid collection structure 30 includes a first liquid collection structure 301. The first liquid collection structure 301 is disposed below the first encapsulation part 2111 along the first direction and is used to collect the electrolyte that leaks due to damage to the first encapsulation part 2111.

[0132] It is understood that in this embodiment, the first electrode lead-out portion 221 and the second electrode lead-out portion 222 are respectively connected to the positive and negative electrodes of the electrode assembly and are located at the same end of the pouch cell 20. This can reduce the complexity of opening multiple packaging channels, reduce the complexity of production, and help to make more efficient use of space.

[0133] The first liquid collection structure 301 can collect the electrolyte leaked due to damage to the first encapsulation part 2111. That is, the first electrode lead-out part 221 and the second electrode lead-out part 222 can share the first liquid collection structure 301. To a certain extent, this can avoid problems such as system-level short circuits, corrosion, and even battery failure and arcing. This improves the reliability and safety of the battery device 100 while reducing the space requirement and material consumption of setting up multiple liquid collection structures 30, thus optimizing the space utilization of the battery device 100.

[0134] The first end can be either of the two ends of the pouch-shaped battery cell 20 along the first direction.

[0135] Optionally, according to some embodiments of this application, referring to Figures 9 to 10a, the liquid collection structure 30 includes a flow channel 33 and a liquid storage section 34. The flow channel 33 is located below the encapsulation section 211. The liquid storage section 34 is located on the side of the flow channel 33 opposite to the pouch-shaped battery cell 20, and the flow channel 33 communicates with the liquid storage section 34.

[0136] The liquid collection structure 30 may be provided with a guide channel 33, which is a channel or groove with a certain shape, located below the encapsulation part 211 of the pouch battery cell 20. It can guide the electrolyte to flow towards the liquid storage part 34 after leakage, so as to collect the leaked electrolyte more effectively.

[0137] The electrolyte storage section 34 is a storage area that can contain electrolyte and is located on the side of the guide channel 33 opposite to the pouch cell 20. The electrolyte storage section 34 can contain and store leaked electrolyte guided from the guide channel 33.

[0138] Since electrolyte leakage into the system may cause safety problems such as battery short circuits, corrosion, and overheating, the leakage path of the electrolyte can be effectively controlled by the guide channel 33 and the liquid storage section 34. This allows the electrolyte to flow to the liquid storage section 34, which is farther away from the pouch cell 20, thus preventing the leaked electrolyte from contacting other parts of the battery device 100 and reducing safety hazards.

[0139] The flow channel 33 can be a channel with a certain slope or inclination to guide the flow of electrolyte by gravity. The flow channel 33 is located below the encapsulation section 211, close to the bottom of the pouch cell 20, thereby facilitating the rapid flow of electrolyte to the collection structure 30 in the event of leakage. The shape of the flow channel 33 may be straight, curved, or other arbitrary shapes, depending on the design requirements and spatial layout of the battery device 100.

[0140] The volume and shape of the liquid storage section 34 can be determined based on the electrolyte capacity of the battery device 100 and the expected amount of leakage.

[0141] By combining the guide channel 33 and the liquid storage section 34, the liquid collection structure 30 can more effectively guide and collect the electrolyte leaked when the pouch battery cell 20 encapsulation section 211 is damaged. To a certain extent, it can prevent the electrolyte from spreading to other areas, improve the safety and reliability of the battery device 100, and optimize space utilization.

[0142] Optionally, according to some embodiments of this application, referring to Figures 12 and 13, the battery device 100 further includes a detection element 50. At least a portion of the detection element 50 is located within the electrolyte collection structure 30, and the detection element 50 is used to detect the electrolyte within the electrolyte collection structure 30.

[0143] The detection element 50 is a device used to monitor whether electrolyte accumulates within the liquid collection structure 30 and to generate a signal based on the presence or absence of electrolyte. The detection element 50 can be used to determine whether electrolyte leakage has occurred and to provide alarm or feedback information to help the system take timely safety measures. Optionally, the detection element 50 may include a liquid level sensor.

[0144] The detection element 50 is at least partially located within the electrolyte collection structure 30. Optionally, in some embodiments, as shown in Figures 12 and 13, the detection element 50 is directly installed inside the electrolyte collection structure 30, closely fitting the electrolyte contact area to accurately sense the electrolyte state and respond promptly to electrolyte changes. In some embodiments, the detection element 50 includes a probe that penetrates the outer wall of the electrolyte collection structure 30 and enters the electrolyte collection structure 30, maintaining contact with the electrolyte to avoid complex internal integration and facilitate maintenance or replacement. In some embodiments, the detection element 50 is embedded in a portion of the electrolyte collection structure 30, combined with other components of the electrolyte collection structure 30 (such as the guide channel 33, the liquid storage section 34, etc.) to achieve effective monitoring of the electrolyte without occupying excessive space.

[0145] The number of detection elements 50 can be one or more. In some embodiments, multiple detection elements 50 are distributed at different locations in the liquid collection structure 30 to ensure comprehensive monitoring of electrolyte leakage.

[0146] The detection element 50 is located at least partially within the liquid collection structure 30 and is used to detect the electrolyte within the liquid collection structure 30. This can ensure effective detection of electrolyte leakage to a certain extent and transmit the detection results to the control system or alarm system, thereby increasing the safety and reliability of the battery device 100.

[0147] According to some embodiments of this application, optionally, referring to Figures 2 to 4a and Figures 9 to 10a, a plurality of pouch-shaped battery cells 20 are arranged along a second direction (F2). The liquid collection structure 30 includes a confluence channel 31, which extends along the second direction and is located below the encapsulation portion 211 of the plurality of pouch-shaped battery cells 20. The second direction is perpendicular to the first direction.

[0148] In some embodiments, the electrical device is a vehicle 1000. The first direction corresponds to either the forward / backward direction or the left / right direction of the vehicle 1000, and the second direction corresponds to the other.

[0149] It is understandable that multiple pouch-shaped battery cells 20 are arranged along the second direction to form a battery cell module, and the dimensions of the battery cell module along the second direction correspond to the dimensions of the busbar channel 31 along the second direction.

[0150] It should be noted that a battery cell module may correspond to one or more busbar channels 31. In some embodiments, one battery cell module corresponds to one busbar channel 31, and the dimension of the battery cell module along the second direction corresponds to the dimension of the busbar channel 31 along the second direction. In some embodiments, one battery cell module corresponds to multiple busbar channels 31, and the dimension of the battery cell module along the second direction corresponds to the sum of the dimensions of the multiple busbar channels 31 along the second direction. Each busbar channel 31 may correspond to at least one pouch-shaped battery cell 20. As an example, each busbar channel 31 corresponds to four pouch-shaped battery cells 20.

[0151] The busbar channel 31 is located below the encapsulation portion 211 of the multiple pouch battery cells 20. When the encapsulation portion 211 of at least one pouch battery cell 20 is damaged, the leaked electrolyte can be collected into the busbar channel 31 under the action of gravity.

[0152] Understandably, in some embodiments, the collecting tank 32 extends along the second direction and is located below the encapsulation portion 211 of the plurality of pouch-shaped battery cells 20, thereby forming a manifold 31. Electrolyte leaking from the plurality of pouch-shaped battery cells 20 can flow within the manifold 31. In some embodiments, the liquid storage space provided in the liquid storage portion 34 extends along the second direction and is located below the encapsulation portion 211 of the plurality of pouch-shaped battery cells 20, thereby forming a manifold 31. Electrolyte leaking from the plurality of pouch-shaped battery cells 20 can flow within the manifold 31.

[0153] Optionally, the bus channel 31 may not surround, partially surround (as shown in Figures 4 and 4a), or fully surround (as shown in Figures 3 and 3a) the encapsulation portion 211. The lower the degree of enclosure, the lighter the weight and the lower the cost of the bus channel 31; the higher the degree of enclosure, the higher the structural strength of the bus channel 31. Those skilled in the art can determine the degree of enclosure of the bus channel 31 around the encapsulation portion 211 according to actual needs. The shape of the bus channel 31 includes, but is not limited to, a semi-cylinder, an irregular polygon, a rectangle, and a triangle. Optionally, the bus channel 31 fully surrounds the encapsulation portion 211 and is in the shape of a semi-cylinder.

[0154] The term "commutator channel 31 not surrounding the encapsulation portion 211" can mean that, in the first direction, the projection of the commutator channel 31 does not overlap with the projection of the encapsulation portion 211. The term "commutator channel 31 partially surrounding the encapsulation portion 211" can mean that, in the first direction, the projection of the commutator channel 31 at least partially overlaps with the projection of the encapsulation portion 211, and in a third direction, toward the direction away from the inner bottom wall 13 of the housing 10, the projection of the commutator channel 31 does not overlap with the projection of the encapsulation portion 211. The term "commutator channel 31 fully surrounding the encapsulation portion 211" can mean that, in the first direction, the projection of the commutator channel 31 covers the projection of the encapsulation portion 211, and in a third direction, the projection of the commutator channel 31 covers the projection of the encapsulation portion 211.

[0155] The busbar channel 31 extends along the second direction and is located below the encapsulation portion 211 of multiple pouch-shaped battery cells 20. It can form a battery cell module to increase the overall energy storage capacity of the battery device 100 and meet the energy demand. At the same time, the busbar channel 31 can collect the electrolyte leaked from the module and prevent the electrolyte from spreading to other areas to a certain extent, thereby improving the safety and reliability of the battery device 100.

[0156] According to some embodiments of this application, optionally, referring to Figures 12 and 13, the battery device 100 further includes a detection element 50, at least a portion of which is located within the manifold 31, and the detection element 50 is used to detect liquid within the manifold 31.

[0157] The detection element 50 is a device used to monitor whether electrolyte accumulates in the manifold 31 and to generate a signal based on the presence or absence of electrolyte. The detection element 50 can be used to determine whether electrolyte leakage has occurred and to provide alarm or feedback information to help the system take timely safety measures. Optionally, the detection element 50 may include a liquid level sensor.

[0158] The detection element 50 is at least partially located within the manifold 31. Optionally, in some embodiments, the detection element 50 is directly installed inside the manifold 31, closely fitting the electrolyte contact area to accurately sense the state of the electrolyte and respond promptly to changes in the electrolyte. In some embodiments, the detection element 50 includes a probe that passes through the outer wall of the manifold 31 and can enter the manifold 31 to maintain contact with the electrolyte, avoiding complex internal integration and facilitating maintenance or replacement. In some embodiments, the detection element 50 is embedded in a portion of the manifold 31, combined with other components of the manifold 31, to achieve effective monitoring of the electrolyte without occupying excessive space.

[0159] The number of detection elements 50 can be one or more. In some embodiments, multiple detection elements 50 are distributed at different locations in the manifold 31 to ensure comprehensive monitoring of electrolyte leakage.

[0160] The detection element 50 is located at least partially within the busbar channel 31 and is used to detect the electrolyte within the busbar channel 31. This can ensure effective detection of electrolyte leakage to a certain extent and transmit the detection results to the control system or alarm system, thereby increasing the safety and reliability of the battery device 100.

[0161] Optionally, according to some embodiments of this application, referring to Figures 12 and 13, the bottom wall of the confluence channel 31 is provided with a recess 311, and the detection element 50 is disposed in the recess 311.

[0162] When the electrolyte in the pouch cell 20 leaks, the recess 311 can collect more of the leaked electrolyte. The detection element 50 in the recess 311 can detect the electrolyte leak more quickly and transmit the detection result to the control system or alarm system.

[0163] The bottom wall of the manifold 31 is provided with a recess 311, and the detection element 50 is disposed in the recess 311, so that the leaked electrolyte can be concentrated in the recess 311, thereby enabling the detection element 50 to detect the electrolyte more quickly and accurately.

[0164] According to some embodiments of this application, optionally, referring to Figures 12 and 13, the bottom wall of at least one side of the recess 311 is inclined toward the recess 311 along the second direction.

[0165] Referring to Figure 12, in one embodiment, along the second direction, the bottom walls on both sides of the recess 311 are inclined toward the recess 311. Referring to Figure 13, in some embodiments, the bottom wall on one side of the recess 311 is inclined toward the recess 311.

[0166] Understandably, along the second direction, the bottom wall of at least one side of the recess 311 is inclined towards the recess 311, so that the recess 311 is located at the lowest point of the bottom wall of the confluence channel 31. When the electrolyte of the pouch cell 20 leaks, the electrolyte can accumulate in the recess 311 under the action of gravity, so that the detection element 50 can detect the electrolyte leakage more quickly.

[0167] Along the second direction, the bottom wall of at least one side of the recess 311 is inclined toward the recess 311, which can guide the electrolyte to flow to the recess 311, thereby improving the electrolyte detection sensitivity and accelerating the response time to a certain extent, which helps to improve the overall safety and reliability of the battery device 100.

[0168] According to some embodiments of this application, optionally, referring to Figures 12 and 13, the inclination angle of the bottom wall of the recess 311 on any side of the second direction toward the recess 311 is R, where 0° < R ≤ 10°.

[0169] The angle of inclination R affects the direction and speed of liquid flow. A smaller angle of inclination R means a flatter bottom wall and slower liquid flow; a larger angle of inclination R will cause the liquid to converge more quickly toward the concave part 311.

[0170] It is understood that those skilled in the art can determine the tilt angle R by comprehensively considering factors such as the volume or space requirements of the battery device 100, and this application does not impose any specific limitations.

[0171] In some examples, the tilt angle R is 0.5°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, or other values ​​where 0° < R ≤ 10°.

[0172] The tilt angle R satisfies 0° < R ≤ 10°, which can ensure the electrolyte collection efficiency under different leakage scenarios to a certain extent, thereby improving the safety and reliability of the battery device 100. At the same time, it can avoid the problem of a large thickness of the liquid collection structure 30 in the third direction when the tilt angle is greater than 10°.

[0173] According to some embodiments of this application, optionally, referring to Figures 12 and 13, 5°≤R≤10°.

[0174] In some examples, the tilt angle R is 5°, 6°, 7°, 8°, 9°, 10° or other values ​​of 5°≤R≤10°.

[0175] The tilt angle R satisfies 5°≤R≤10°, allowing the electrolyte to flow more rapidly to the recess 311, reducing the time the liquid stays in the manifold 31. This enables the rapid accumulation of leaked electrolyte, thereby improving the electrolyte detection sensitivity and accelerating the response time, which helps to enhance the overall safety and reliability of the battery device 100. Simultaneously, it can, to some extent, avoid the problem of a larger thickness of the liquid collection structure 30 in the third direction when the tilt angle is greater than 10°.

[0176] In some embodiments, the battery device 100 includes a plurality of detection elements 50, and the bottom wall of the busbar channel 31 is provided with a plurality of recesses 311. The plurality of detection elements 50 are correspondingly disposed in different recesses 311. The bottom walls on both sides or one side of each recess 311 are inclined toward the recess 311. The inclination angle of the bottom wall on any side of each recess 311 toward the recess 311 along the second direction may be equal or unequal.

[0177] According to some embodiments of this application, optionally, referring to Figures 3 to 4a and Figures 9 to 10a, the width of the bus channel 31 is x, where 0.5cm ≤ x ≤ 3cm.

[0178] The width x of the manifold 31 affects the liquid flow velocity. A smaller width x of the manifold 31 means that the electrolyte experiences greater resistance when flowing within the manifold 31; a larger width x of the manifold 31 results in less resistance when flowing within the manifold 31, allowing the liquid to converge more quickly toward the recess 311.

[0179] It is understood that those skilled in the art can determine the width x of the busbar channel 31 by comprehensively considering factors such as the volume or space requirements of the battery device 100, and this application does not make any specific limitation.

[0180] In some examples, the width x of the bus channel 31 is 0.5cm, 1cm, 1.5cm, 2cm, 2.5cm, 3cm, or other values ​​where 0.5cm ≤ x ≤ 3cm.

[0181] The width x of the manifold 31 satisfies 0.5cm≤x≤3cm, which can ensure the electrolyte collection efficiency under different leakage scenarios to a certain extent, thereby improving the safety and reliability of the battery device 100. At the same time, it can avoid the problem of the liquid collection structure 30 having a large dimension in the first direction when the width x of the manifold 31 is greater than 3cm.

[0182] According to some embodiments of this application, optionally, referring to Figures 3 to 4a and Figures 9 to 10a, 0.5 ≤ x ≤ 1 cm.

[0183] In some examples, the width x of the bus channel 31 is 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1cm, or other values ​​where 0.5cm≤x≤1cm.

[0184] In practical applications, electrolyte leakage is often small. The width x of the manifold 31, which satisfies 0.5 ≤ x ≤ 1 cm, can provide a flow path for the leaked electrolyte, while reducing space utilization and improving the compactness of the battery device 100. Simultaneously, it allows the liquid collection structure 30 to occupy less space, further contributing to the compactness of the battery device 100.

[0185] According to some embodiments of this application, optionally, referring to Figures 3 to 4a and Figures 9 to 10a, the depth of the confluence channel 31 is h, where 0 < h ≤ 1 cm.

[0186] The depth h of the manifold 31 affects the liquid flow velocity. A smaller depth h of the manifold 31 means that the electrolyte experiences greater resistance when flowing within the manifold 31; a larger depth h of the manifold 31 results in less resistance when flowing within the manifold 31, causing the liquid to converge more quickly toward the recess 311.

[0187] It is understandable that the width x and depth h of the manifold 31 together define the volume of the channel space corresponding to the manifold 31. The larger the width x, the larger the volume of the channel space, and the smaller the resistance encountered by the electrolyte when flowing in the manifold 31; the larger the depth h, the larger the volume of the channel space, and the smaller the resistance encountered by the electrolyte when flowing in the manifold 31.

[0188] It is understood that those skilled in the art can determine the depth h of the busbar channel 31 by comprehensively considering factors such as the volume or space requirements of the battery device 100, and this application does not make any specific limitation.

[0189] The depth h of the busbar channel 31 satisfies 0 < h ≤ 1 cm, which can provide a flow path for the leaked electrolyte and ensure the collection efficiency of the electrolyte under different leakage scenarios to a certain extent, thereby improving the safety and reliability of the battery device 100.

[0190] In some examples, the depth h of the merging channel 31 is 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1cm, or other values ​​where 0 < h ≤ 1cm. In one example, the depth h of the merging channel 31 is 0.5cm.

[0191] In some embodiments, the distance between the bottom wall of the busbar channel 31 and the side of the pouch cell 20 facing the electrode lead-out portion 22 is y, where 0 ≤ y ≤ 0.5 cm.

[0192] The smaller the y, the closer the bottom wall of the current channel 31 is to the side of the bag-shaped battery cell 20 and the electrode lead-out portion 22. That is, the closer the current channel 31 is to the easily damaged encapsulation portion 211, so that the leaked electrolyte can flow into the current channel 31 more quickly.

[0193] In some examples, the distance y = 0cm, 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.5cm, or other values ​​where 0 ≤ y ≤ 0.5cm. In one example, y = 0cm.

[0194] According to some embodiments of this application, optionally, the battery device 100 includes a battery management system, which is electrically connected to a detection element 50, which is configured to send an alarm signal to the battery management system when electrolyte leakage is detected.

[0195] The Battery Management System (BMS) is a management system in the battery device 100 used to monitor, manage, and protect the pouch-shaped battery cells 20. Through a series of sensors, control algorithms, and hardware devices, it ensures that the pouch-shaped battery cells 20 operate under safe and reliable conditions, preventing damage or safety accidents caused by overcharging, over-discharging, voltage imbalance, or excessive temperature.

[0196] The detection element 50 is a device in the battery unit 100 used to sense and detect electrolyte leakage or other abnormalities. It monitors electrolyte leakage in real time through sensors, detectors, and other devices, and sends an alarm signal to the battery management system when a leak occurs.

[0197] The battery management system is electrically connected to the detection device 50. When the detection device 50 detects electrolyte leakage, it can promptly provide alarm or feedback information to the battery management system, which is conducive to the battery management system taking timely safety measures, such as controlling the power outage of the bag-shaped battery cell 20 where electrolyte leakage occurs (stopping charging, stopping discharging), etc.

[0198] According to some embodiments of this application, optionally, referring to FIG11, the battery device 100 further includes a liquid suction member 60, which is located in the liquid collection structure 30.

[0199] The absorbent component 60 is a part capable of absorbing leaked electrolyte and can be made of a material with strong water absorption properties. When electrolyte leakage occurs in the battery device 100, the absorbent component 60 can quickly absorb the leaked electrolyte, thereby reducing the extent of electrolyte leakage and, to a certain extent, avoiding problems such as system-level short circuits, corrosion, battery failure, and sparking caused by electrolyte leakage.

[0200] The absorbent element 60 includes, but is not limited to, non-woven fabric, foam, resin, etc. Optionally, the absorbent element 60 includes foam.

[0201] Optionally, in one embodiment, as shown in FIG11, the liquid suction member 60 can be fitted against the inner side wall of the housing 10. Optionally, in one embodiment, the liquid suction member 60 and the inner side wall of the housing 10 can be spaced apart.

[0202] The liquid absorption element 60 is located in the liquid collection structure 30, which can ensure timely absorption of electrolyte to a certain extent when electrolyte leakage occurs in the battery device 100.

[0203] In some embodiments, referring to Figures 2 and 11, a plurality of pouch-shaped battery cells 20 are arranged along a second direction, and the battery device 100 further includes a liquid-absorbing member 60, which extends along the second direction to be located below the encapsulation portion 211 of the plurality of pouch-shaped battery cells 20, the second direction being perpendicular to the first direction.

[0204] It is understandable that multiple pouch-shaped battery cells 20 are arranged along the second direction to form a battery cell module, and the dimensions of the battery cell module along the second direction correspond to the dimensions of the liquid-absorbing member 60 along the second direction.

[0205] It should be noted that a battery cell module may correspond to one or more liquid-absorbing components 60. In some embodiments, a battery cell module corresponds to one liquid-absorbing component 60, and the dimension of the battery cell module along the second direction corresponds to the dimension of the liquid-absorbing component 60 along the second direction. In some embodiments, a battery cell module corresponds to multiple liquid-absorbing components 60, and the dimension of the battery cell module along the second direction corresponds to the sum of the dimensions of the multiple liquid-absorbing components 60 along the second direction. Each liquid-absorbing component 60 may correspond to at least one pouch-shaped battery cell 20.

[0206] The liquid absorption member 60 is located below the encapsulation portion 211 of the plurality of pouch-shaped battery cells 20. When the encapsulation portion 211 of at least one pouch-shaped battery cell 20 is damaged, the leaked electrolyte can flow to the liquid absorption member 60 and be absorbed by the liquid absorption member 60.

[0207] The battery device 100 includes a liquid absorption member 60, and a plurality of pouch-shaped battery cells 20 are arranged along a second direction. The liquid absorption member 60 extends along the second direction and is located below the encapsulation portion 211 of the plurality of pouch-shaped battery cells 20. This can form a battery cell module to increase the overall energy storage capacity of the battery device 100, meet energy demand, and absorb electrolyte leakage from the battery cell module. To a certain extent, this can prevent electrolyte from spreading to other areas and improve the safety and reliability of the battery device 100.

[0208] In some embodiments, as shown in FIG11, the width of the liquid suction member 60 is a, where 0.5cm≤a≤3cm.

[0209] The width 'a' of the absorbent 60 affects its absorption capacity. A smaller width 'a' means that the absorbent 60 can absorb a limited amount of electrolyte; a larger width 'a' allows the absorbent 60 to absorb more electrolyte.

[0210] It is understood that those skilled in the art can determine the width a of the liquid-absorbing member 60 by comprehensively considering factors such as the volume or space requirements of the battery device 100, and this application does not make any specific limitation.

[0211] In some examples, the width a of the suction element 60 is 0.5cm, 1cm, 1.5cm, 2cm, 2.5cm, 3cm, or other values ​​where 0.5cm ≤ a ≤ 3cm.

[0212] The width a of the liquid absorption component 60 satisfies 0.5cm≤a≤3cm, which can ensure the absorption efficiency of electrolyte under different leakage scenarios to a certain extent, thereby improving the safety and reliability of the battery device 100.

[0213] In some embodiments, as shown in Figure 11, 1cm ≤ a ≤ 2cm.

[0214] In some examples, the width a of the absorbent 60 is 1cm, 1.1cm, 1.2cm, 1.3cm, 1.4cm, 1.5cm, 1.6cm, 1.7cm, 1.8cm, 1.9cm, 2cm or other values ​​that satisfy 1cm≤a≤2cm.

[0215] The width x satisfies 0.5≤x≤1cm, which allows the liquid-absorbing component 60 to absorb more electrolyte, while reducing space utilization and improving the compactness of the battery device 100.

[0216] In some embodiments, as shown in FIG11, the distance between the liquid-absorbing member 60 and the side of the pouch-shaped battery cell 20 and the electrode lead-out portion 22 is b, 0≤b≤0.5cm, and in one example, b=0.

[0217] The smaller the b, the closer the liquid absorber 60 is to the side of the pouch-shaped battery cell 20 and the electrode lead-out portion 22. That is, the closer the liquid absorber 60 is to the easily damaged encapsulation portion 211, so that the leaked electrolyte can be absorbed by the liquid absorber 60 more quickly.

[0218] In some examples, the distance b = 0cm, 0.1cm, 0.2cm, 0.3cm, 0.4cm, 0.5cm, or other values ​​where 0 ≤ b ≤ 0.5cm.

[0219] In some embodiments, optionally, referring to Figures 3 to 4a and Figures 9 to 11, the inner bottom wall 13 of the housing 10 is provided with a thermal management component 14.

[0220] The thermal management component 14 provides a channel for the flow of cooling fluid, including but not limited to cooling water or coolant. Heat from the pouch cell 20 can be transferred to the inner bottom wall 13 through the insulating colloid 40 and the casing 71. The flowing cooling fluid carries away the heat transferred by the insulating colloid 40 and the casing 71, thus dissipating heat from the pouch cell 20. In the battery device 100, the thermal management component 14 can be positioned near the pouch cell 20 to effectively manage heat generated by the pouch cell 20 during operation, helping to maintain the temperature of the battery device 100 within a safe range and preventing overheating.

[0221] A thermal management component 14 is provided on the inner bottom wall 13, which can provide a cooling path so that the heat generated by the pouch battery cell 20 can be quickly removed, maintaining the pouch battery cell 20 within a suitable temperature range, thereby helping to avoid battery performance degradation, overheating or even thermal runaway caused by excessive temperature.

[0222] In some embodiments, the liquid collection structure 30 and the inner bottom wall 13 of the tank 10 may be integrally formed or connected by a connection method known to those skilled in the art.

[0223] According to some embodiments of this application, the pouch-shaped battery cell 20 is any one of a lithium iron phosphate battery cell, a ternary lithium battery cell, and a solid-state battery cell.

[0224] In other words, in some embodiments, the pouch-shaped battery cell 20 is constructed as a lithium iron phosphate battery, in some embodiments, the pouch-shaped battery cell 20 is constructed as a ternary lithium battery cell, and in some embodiments, the pouch-shaped battery cell 20 is constructed as a solid-state battery cell.

[0225] Solid-state battery cells can be, but are not limited to, polymer solid-state battery cells, oxide solid-state battery cells, sulfide solid-state battery cells, halide solid-state battery cells, etc. Solid-state battery cells can also be semi-solid-state battery cells or all-solid-state battery cells.

[0226] In the above technical solutions, in the embodiments of this application that are constructed as lithium iron phosphate battery cells, the reliability of the pouch battery cells can be improved and the cycle life of the pouch battery cells can be extended. In the embodiments of this application that are constructed as ternary lithium battery cells, the energy density of the pouch battery cells can be improved and the driving range can be increased. In the embodiments of this application that are constructed as solid-state pouch battery cells, not only the energy density can be improved, but also the reliability can be improved.

[0227] According to some embodiments of this application, when the pouch battery cell 20 is a lithium iron phosphate (LiFeO4) battery cell, the ratio of positive electrode active material, positive electrode binder and positive electrode conductive agent in the positive electrode material of the pouch battery cell 20 is 96:(1-3):(1-3); when the pouch battery cell 20 is a ternary lithium battery cell, the ratio of positive electrode active material, positive electrode binder and positive electrode conductive agent in the positive electrode material of the pouch battery cell 20 is 96:(2-3):(1-2).

[0228] It is understandable that when the pouch battery cell 20 is a lithium iron phosphate battery cell, the positive electrode active material accounts for 96 parts of the total weight of the positive electrode material, the binder accounts for 1 to 3 parts of the total weight of the positive electrode material (for example, including but not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1 to 3 parts of the total weight of the positive electrode material (for example, including but not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.).

[0229] For example, when the pouch cell 20 is a lithium iron phosphate battery cell, the positive electrode active material is LFP (which can refer to LiFePO4, i.e., lithium iron phosphate), the binder can be PVDF (polyvinylidene fluoride), and the conductive agent can be conductive carbon black. The ratio of LFP:PVDF:conductive carbon black can be 96:2:2, meaning that the total weight of the positive electrode active material is divided into 100 parts, with LFP accounting for 96 parts, PVDF accounting for 2 parts, and conductive carbon black also accounting for 2 parts. The weight unit of the positive electrode active material can be grams.

[0230] When the pouch-shaped battery cell 20 is a ternary lithium battery cell, in the positive electrode material of the pouch-shaped battery cell 20, the positive electrode active material accounts for 96 parts of the total weight of the positive electrode material, the binder accounts for 2 to 3 parts of the total weight of the positive electrode material (for example, including but not limited to 2, 2.2, 2.5, 2.8, 3, etc.), and the conductive agent accounts for 1 to 2 parts of the total weight of the positive electrode material (for example, including but not limited to 1, 1.2, 1.5, 1.8, 2, etc.). The ternary lithium battery cell can be, but is not limited to, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, etc.

[0231] For example, the ternary material of the ternary battery cell can be an octet LiNi. 0.8 Co 0.1 Mn 0.1 The weight ratio of O2, positive electrode active material, binder, and conductive agent is 96:2.5:1.5, meaning the total weight of the positive electrode material is divided into 100 parts. (This refers to the octet LiNi...) 0.8 Co 0.1 Mn 0.1The composition of O2 is 96 parts, the composition of adhesive is 2.5 parts, and the composition of conductive agent is 1.5 parts.

[0232] In the above technical solutions, when the pouch-shaped battery cell 20 is a lithium iron phosphate battery cell, a high proportion of positive electrode active material means that more substances capable of electrochemical reactions can be accommodated within a limited electrode assembly. This is beneficial for increasing the capacity and energy density of the battery device 100, enabling the lithium iron phosphate battery cell to output higher power while maintaining a relatively small volume and weight, meeting the application scenarios with certain energy density requirements. Using the above-mentioned range for the amount of binder and conductive agent can reduce the cost of auxiliary materials, thereby reducing the overall cost of the battery device 100. When the pouch-shaped battery cell 20 is a ternary battery cell, due to the relatively complex structure and surface properties of ternary materials, using the above-mentioned proportions of positive electrode active material, binder, and conductive agent helps ensure good adhesion between positive electrode active material particles and between the active material and the current collector, thereby improving the mechanical stability and integrity of the electrode assembly. This helps reduce the risk of active material detachment and electrode pulverization during charging and discharging, extending the cycle life of the battery device 100.

[0233] According to some embodiments of this application, this application also provides an energy storage device 1, which includes a battery device 100 as described in any of the above embodiments, and the battery device 100 is used to store or provide electrical energy.

[0234] Energy storage device 1 includes one or more battery clusters to increase the voltage and capacity of energy storage device 1. A battery cluster may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of energy storage device 1. When energy storage device 1 includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of energy storage device 1. The definition of battery device 100 is given above and will not be repeated here.

[0235] The energy storage device 1 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1 can store electrical energy as needed and output it at appropriate times. For example, the energy storage device 1 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system 2000 provided in this application embodiment can be any power system that requires the use of the energy storage device 1.

[0236] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0237] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters, with the battery clusters housed in the cabinet.

[0238] In some embodiments, the energy storage device 1 may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0239] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via piping for regulating the temperature of the individual battery cells.

[0240] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0241] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0242] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system 2000.

[0243] As an example, the power distribution module can be used to distribute power to the power supply module of the energy storage device 1.

[0244] According to some embodiments of this application, and referring to FIG14, this application also provides an energy storage system 2000, which includes a power conversion device and an energy storage device 1 as described in any of the above embodiments, and a battery device 100 for storing or providing electrical energy.

[0245] The energy storage system 2000 may include one or more energy storage devices 1 and a power conversion device 2 (PCS), wherein the power conversion device 2 is used to connect the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power conversion device 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0246] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100, an energy storage device 1, or an energy storage system 2000 as described in any of the above solutions, wherein the battery device 100 is used to store or provide electrical energy.

[0247] According to some embodiments of this application, referring to FIG15, this application also provides a charging network 3000, which includes a charging pile 4 and an energy storage device 1 or an energy storage system 2000 as described in any of the above schemes. The energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0248] The charging network 3000 may include a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device 100 in the energy storage device 1 via a cable. The battery device 100 can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical devices (such as a vehicle 1000) to replenish power to them. The definition of the battery device 100 is given above and will not be repeated here.

[0249] The energy storage device 1 can be located inside the charging pile 4 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4.

[0250] 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: An energy unit includes a housing and a pouch-shaped battery cell located within the housing. The pouch-shaped battery cell includes a pouch-shaped housing, an electrode assembly, and an electrode lead-out portion. The electrode assembly is encapsulated within the pouch-shaped housing, and the electrode lead-out portion is at least partially located within the pouch-shaped housing to connect to the electrode assembly. Furthermore, the pouch-shaped housing has an encapsulation portion at one end in a first direction, and at least a portion of the electrode lead-out portion is exposed from the encapsulation portion. A liquid collecting structure is provided at the end of the pouch-shaped battery cell in the energy unit along the first direction, and the liquid collecting structure is located below the encapsulation portion.

2. The battery device according to claim 1, characterized in that, The electrode lead-out portion includes a first electrode lead-out portion and a second electrode lead-out portion, which are respectively located at both ends of the pouch-shaped battery cell along the first direction; the encapsulation portion includes a first encapsulation portion and a second encapsulation portion, which are correspondingly disposed with respect to the first electrode lead-out portion, and the first electrode lead-out portion is at least partially exposed from the first encapsulation portion; the second encapsulation portion is correspondingly disposed with respect to the second electrode lead-out portion, and the second electrode lead-out portion is at least partially exposed from the second encapsulation portion; The liquid collection structure includes a first liquid collection structure and a second liquid collection structure. The first liquid collection structure corresponds to the first packaging part along the first direction and is located below the first packaging part. The second liquid collection structure corresponds to the second packaging part along the first direction and is located below the second packaging part.

3. The battery device according to claim 2, characterized in that, The energy unit includes a plurality of pouch-shaped battery cells placed in the housing. The housing has first openings on both sides along the first direction. The battery device also includes two insulating members, which are respectively covered by the first openings on both sides. The first liquid collection structure and the second liquid collection structure are respectively disposed on the two insulating members.

4. The battery device according to any one of claims 1-3, characterized in that, The battery device includes a housing, the housing further including a second opening facing the inner bottom wall of the housing, an insulating colloid between the pouch-shaped battery cell and the inner bottom wall of the housing, the insulating colloid at least partially penetrating through the second opening to insulate the pouch-shaped battery cell and the inner bottom wall of the housing, the liquid collection structure including a liquid collection tank, the minimum distance between the bottom wall of the liquid collection tank and the inner bottom wall of the housing is less than the maximum distance between the upper surface of the insulating colloid and the inner bottom wall of the housing.

5. The battery device according to any one of claims 1-4, characterized in that, The electrode lead-out portion includes a first electrode lead-out portion and a second electrode lead-out portion, which are spaced apart at a first end of the pouch-shaped battery cell along the first direction. The encapsulation portion includes a first encapsulation portion located at the first end, and at least a portion of both the first electrode lead-out portion and the second electrode lead-out portion are exposed from the first encapsulation portion. The liquid collection structure includes a first liquid collection structure, which corresponds to the first encapsulation part along the first direction and is located below the first encapsulation part.

6. The battery device according to any one of claims 1-5, characterized in that, The liquid collection structure includes a flow channel and a liquid storage section. The flow channel is located below the encapsulation section, and the liquid storage section is located on the side of the flow channel away from the pouch-shaped battery cell. The flow channel is connected to the liquid storage section.

7. The battery device according to any one of claims 1-6, characterized in that, The battery device includes a detection element, at least a portion of which is located within the liquid collection structure, the detection element being used to detect liquid within the liquid collection structure.

8. The battery device according to any one of claims 1-7, characterized in that, The plurality of the pouch-shaped battery cells are arranged along a second direction, and the liquid collection structure includes a confluence channel that extends along the second direction to be located below the encapsulation portion of the plurality of pouch-shaped battery cells. The second direction is perpendicular to the first direction.

9. The battery device according to claim 8, characterized in that, The battery device includes a detection element, at least a portion of which is located within the manifold, the detection element being used to detect liquid within the manifold.

10. The battery device according to claim 9, characterized in that, The bottom wall of the confluence channel is provided with a recess, and the detection element is disposed in the recess.

11. The battery device according to claim 10, characterized in that, Along the second direction, the bottom wall of at least one side of the recess is inclined toward the recess.

12. The battery device according to claim 10 or 11, characterized in that, The angle of inclination of the bottom wall of the recess on any side along the second direction toward the recess is R, where 0° < R ≤ 10°.

13. The battery device according to claim 12, characterized in that, 5°≤R≤10°。 14. The battery device according to any one of claims 8-13, characterized in that, The width of the confluence channel is x, where 0.5cm ≤ x ≤ 3cm.

15. The battery device according to claim 14, characterized in that, 0.5≤x≤1cm.

16. The battery device according to any one of claims 8-15, characterized in that, The depth of the confluence channel is h, where 0 < h ≤ 1 cm.

17. The battery device according to any one of claims 7, 9-13, characterized in that, The battery device includes a battery management system, which is electrically connected to the detection device, which is configured to send an alarm signal to the battery management system when a liquid leak is detected.

18. The battery device according to any one of claims 1-17, characterized in that, The battery device also includes a liquid suction element located in the liquid collection structure.

19. The battery device according to any one of claims 1-18, characterized in that, The pouch-shaped battery cell is any one of lithium iron phosphate battery cell, ternary battery cell, and solid-state battery cell.

20. An energy storage device, characterized in that, The battery device includes any one of claims 1-19, the battery device being used to store or provide electrical energy.

21. An energy storage system, characterized in that, It includes a power conversion device and an energy storage device as described in claim 20, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

22. An electrical appliance, characterized in that, The battery device includes any one of claims 1-19, the energy storage device of claim 20, or the energy storage system of claim 21, wherein the battery device is used to store or provide electrical energy.

23. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in claim 20 or an energy storage system as described in claim 21, wherein the energy storage device is used to provide electrical energy to the charging pile.

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