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, an electric device and a charging network (3000). The battery device (100) comprises: a case (10) having an inner bottom wall (13); an energy unit (70), comprising a pouch-shaped battery cell (20) and a housing (30), wherein the housing (30) is internally provided with an accommodating cavity (31), a first opening (32) is provided on the side surface of the housing (30) facing a first direction, the first opening (32) faces the inner bottom wall (13), the pouch-shaped battery cell (20) is accommodated in the accommodating cavity (31), the pouch-shaped battery cell (20) is bonded to the inner bottom wall (13) by means of an adhesive (60) at the first opening (32), and the other side surface of the housing (30) facing the first direction is a first housing wall (33); and a first elastic member (40) arranged in the housing (30) and at least partially located between the first housing wall (33) and the pouch-shaped battery cell (20).

Description

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

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202520160694.9, filed with the China National Intellectual Property Administration on January 23, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] 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

[0004] 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.

[0005] The battery device may include a housing and multiple pouch battery cells. Since the housing opening faces downwards and accommodates at least one pouch battery cell in the housing, under the vibration condition of the battery device, the pouch battery cell is prone to vertical movement in the height direction. This can cause the bottom colloid of the pouch battery cell to crack after displacement, or even cause the pouch-shaped outer shell of the pouch battery cell to break. Summary of the Invention

[0006] 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 problem that the bottom of the pouch battery cell is prone to cracking after displacement under vibration conditions, and even lead to the damage of the pouch battery cell.

[0007] In a first aspect, this application provides a battery device, the battery device comprising:

[0008] The box has an inner bottom wall;

[0009] An energy unit includes a pouch-shaped battery cell and a housing. The housing has a receiving cavity, and a first opening is provided on one side of the housing facing a first direction. The first opening faces the inner bottom wall. The pouch-shaped battery cell is housed in the receiving cavity, and the pouch-shaped battery cell is bonded to the inner bottom wall at the first opening by an adhesive. The other side of the housing facing the first direction is a first housing wall.

[0010] A first elastic element is disposed within the housing and is at least partially located between the first housing wall and the pouch-shaped battery cell.

[0011] In the technical solution of this application embodiment, the first elastic member is disposed inside the housing and is at least partially located between the first housing wall and the pouch-shaped battery cell. When the battery device is subjected to external vibration or impact along the first direction, it can reduce the displacement of the pouch-shaped battery cell in the first direction to a certain extent. Furthermore, the first elastic member and the pouch-shaped battery cell have elastic soft contact, which effectively prevents the gel from cracking or the pouch-shaped battery cell from breaking, thereby extending the service life of the battery device and improving the reliability of the electric vehicle.

[0012] In some embodiments, the first elastic member abuts against the pouch-shaped battery cell and the first housing wall on both sides along the first direction, respectively.

[0013] In some embodiments, the first elastic element connects the pouch-shaped battery cell to the first housing wall via an adhesive backing.

[0014] In some embodiments, the elastic modulus of the material of the first elastic element is K, where 0.1 GPa < K < 1 GPa.

[0015] In some embodiments, the thickness of the first elastic element is D, where 0.2 mm ≤ D ≤ 10 mm.

[0016] In some embodiments, the pouch-shaped battery cell includes a first electrode lead and a second electrode lead with opposite polarities, one of which is electrically connected to the housing, and the first elastic member includes an insulating layer or an insulating shell.

[0017] In some embodiments, the first housing wall is provided with a pressure relief structure, and the first elastic element is spaced apart from the pressure relief structure.

[0018] In some embodiments, the end of the housing near the first opening is provided with a limiting structure, and the pouch-shaped battery cell is located between the first elastic member and the limiting structure.

[0019] In some embodiments, the housing includes two second openings opposite each other along a second direction, the first opening being located on one side of the two second openings along the first direction and communicating with the two first openings, the second direction intersecting the first direction, the housing having a second shell wall on the third direction side; the third direction being perpendicular to the plane formed by the first direction and the second direction, the battery device including a second elastic member disposed within the housing and at least partially located between the second shell wall and the pouch-shaped battery cell.

[0020] In some embodiments, the second elastic member connects the pouch-shaped battery cell to the second shell wall via an adhesive backing.

[0021] In some embodiments, the elastic modulus of the second elastic element is greater than that of the first elastic element.

[0022] In some embodiments, the elastic modulus of the material of the second elastic member is F, where 0.1 GPa < F < 1 GPa.

[0023] In some embodiments, the pouch-shaped battery cell includes a first electrode lead and a second electrode lead with opposite polarities, one of which is electrically connected to the housing, and the second elastic member includes an insulating layer or an insulating shell.

[0024] In some embodiments, the pouch-shaped battery cell adjacent to the first elastic member includes a pouch-shaped housing and an electrode assembly located in the pouch-shaped housing and projected onto the first housing wall along the third direction, and the projection of the second elastic member completely covers the projection of the electrode assembly.

[0025] In some embodiments, the second elastic element is insulating and flame-retardant to isolate the pouch cell from the second shell wall.

[0026] In some embodiments, the thickness of the second elastic element is less than the thickness of the first elastic element.

[0027] In some embodiments, the thickness of the second elastic element is S, where 0.2 mm ≤ S ≤ 10 mm.

[0028] In some embodiments, the inner bottom wall is provided with a water-cooling channel, and the opening faces the water-cooling channel.

[0029] In some embodiments, the colloid is thermally conductive.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Fourthly, this application provides an electrical device that includes the battery device, energy storage device, or energy storage system in any of the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0034] 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.

[0035] 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, specific embodiments of this application are given below. Attached Figure Description

[0036] 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:

[0037] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0038] Figure 2 is an exploded structural diagram of a battery device according to some embodiments of this application;

[0039] Figure 3 is a partial cross-sectional structural schematic diagram of a battery device according to some embodiments of this application;

[0040] Figure 4 is a partial cross-sectional structural schematic diagram of a battery device according to some embodiments of this application;

[0041] Figure 5 is an exploded view of a single pouch-shaped battery cell according to some embodiments of this application;

[0042] Figure 6 is a schematic diagram of the modules of an energy storage system according to some embodiments of this application;

[0043] Figure 7 is a schematic diagram of the modules of a charging network according to some embodiments of this application.

[0044] 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, bottom plate 14, water cooling channel 131; Pouch-shaped battery cell 20, first electrode lead-out part 21, second electrode lead-out part 22; Housing 30, receiving cavity 31, first opening 32, first housing wall 33, limiting structure 34, second housing wall 35, second opening 36; First elastic element 40; Second elastic element 50; Colloid 60; Energy unit 70. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0051] 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.

[0052] 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.

[0053] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0054] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0055] 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.

[0056] In electric vehicle applications, the structural design of the battery pack is crucial, especially since its performance under dynamic conditions (such as vibrations during driving) directly affects the battery pack's lifespan and safety. A battery pack can consist of a casing and multiple pouch cell batteries. Compared to traditional hard-shell cells, pouch cells are lighter and denser, but their internal structure is more fragile and sensitive to external vibrations. Pouch cells mainly consist of a flexible, pouch-like casing and electrode components; their overall mechanical strength is relatively low, making them prone to displacement or deformation under frequent vibrations, especially during vehicle operation.

[0057] The inventors discovered during the design process that when the casing opening faces downwards and the pouch battery cells are placed vertically or stacked inside the casing, the casing can protect the pouch battery cells. However, the pouch battery cells are prone to vertical movement. While the pouch battery cells naturally sink under gravity, vibrations from vehicle operation are transmitted to the battery pack, causing relative vertical movement. This vertical movement negatively impacts the overall structure of the pouch battery cells.

[0058] The inventors further discovered during the design process that while the individual pouch battery cells could be bonded to the inner bottom wall of the casing using an adhesive to maintain their position, repeated up-and-down vibrations could subject these adhesive bonding points to significant mechanical stress, potentially causing the adhesive layer to loosen or crack. Once the adhesive cracks, the pouch battery cell's fixing function fails, and the cell may further shift or oscillate, posing a risk of mechanical damage. This damage could manifest as breakage of the pouch battery cell's outer casing or even affect the internal structure, leading to more serious safety hazards such as electrolyte leakage or short circuits.

[0059] Based on the above considerations, in order to solve the problem that the bottom colloid of the pouch-shaped battery cell is prone to cracking after displacement under vibration conditions, and even leading to damage to the pouch-shaped battery cell, this application provides a battery device 100. By providing a first elastic element 40 within the housing 30, with the first elastic element 40 at least partially located between the first shell wall 33 of the housing 30 and the pouch-shaped battery cell 20, the device aims to effectively alleviate the problem of lateral movement under vibration conditions. The function of the first elastic element 40 is to absorb and disperse part of the vibration force, playing a buffering role, thereby reducing the displacement of the pouch-shaped battery cell 20 in the height direction.

[0060] The battery device 100 mentioned in the embodiments of this application may include one or more pouch-shaped battery cell assemblies for providing voltage and capacity. The pouch-shaped battery cell assembly may include multiple pouch-shaped battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0061] In some embodiments, a battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0062] As an example, the pouch-shaped 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 be formed by binding multiple pouch-shaped battery cells 20 together with cable ties.

[0063] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more pouch-shaped battery cell assemblies housed within the housing 10.

[0064] As an example, the pouch-shaped battery cell assembly can be a battery module, and the pouch-shaped battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0065] As an example, the pouch battery cell assembly can also be housed in the housing 10 by directly fixing multiple pouch battery cells 20 to the housing 10.

[0066] As an example, referring to Figure 2, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the pouch-shaped battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0067] 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 a closed space to accommodate the pouch-shaped battery cell assembly.

[0068] 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.

[0069] 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.

[0070] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0071] 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.

[0072] 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.

[0073] In the battery device 100, there can be multiple housings 30, and within each housing 30, 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 the pouch-shaped battery cells 20 are connected in both series and parallel connections. The pouch-shaped battery cells 20 can be directly connected in series, parallel, or in a mixed configuration together, and the entire assembly of the pouch-shaped battery cells 20 can be housed within the housing 30. The pouch-shaped battery cells 20 within the multiple housings 30 can then be connected in series, parallel, or in a mixed configuration to form a whole, which is then 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.

[0074] 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.

[0075] 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.

[0076] According to some embodiments of this application, referring to FIG3, an embodiment of this application provides a battery device 100. The battery device 100 includes a housing 10 and an energy unit 70. The energy unit 70 includes a pouch-shaped battery cell 20, a casing 30, and a first elastic member 40. The housing 10 has an inner bottom wall 13. The casing 30 has a receiving cavity 31, in which the pouch-shaped battery cell 20 is housed. A first opening 32 is provided on one side of the casing 30 facing a first direction F1, and the first opening 32 faces the inner bottom wall 13. The pouch-shaped battery cell 20 is bonded to the inner bottom wall 13 by an adhesive 60. The other side of the casing 30 facing the first direction is a first casing wall 33. The first elastic member 40 is disposed within the casing 30 and is at least partially located between the first casing wall 33 and the pouch-shaped battery cell 20.

[0077] 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.

[0078] Energy unit 70 refers to a group of units formed by housing at least one pouch-shaped battery cell 20 within a housing 30. Multiple pouch-shaped battery cells 20 can be housed in a housing 30 simultaneously. Energy unit 70 may have electrode connection portions for electrical connection with other devices or other energy units 70. The electrode connection portions may be electrically connected to the pouch-shaped battery cells 20 within the housing 30.

[0079] The pouch-shaped battery cell 20 is a pouch-shaped soft-pack battery cell. Due to the use of flexible packaging materials (such as aluminum-plastic film) for sealing, the pouch-shaped battery cell 20 has the characteristics of being lightweight and high-density. The pouch-shaped battery cell 20 is housed in the housing 10 and fixed to the inner bottom wall 13 of the housing 10 with adhesive 60 to ensure that the pouch-shaped battery cell 20 can maintain a stable position in the housing 10.

[0080] The housing 30 is a direct housing structure for the pouch-shaped battery cell 20, and its interior forms a receiving cavity 31 for housing and protecting the pouch-shaped battery cell 20. The first opening 32 on the housing 30 faces the inner bottom wall 13 of the casing 10. The pouch-shaped battery cell 20 is housed in the housing 30 and is bonded to the inner bottom wall 13 via an adhesive 60 at the first opening 32 side of the housing 30. The housing 30 provides support and protection, preventing the pouch-shaped battery cell 20 from being directly squeezed or collided with other components within the casing 10 and thus damaged.

[0081] The first elastic member 40 is disposed within the housing 30, at least partially located between the first housing wall 33 and the pouch-shaped battery cell 20. Optionally, in one embodiment, the first elastic member 40 is completely located between the first housing wall 33 and the pouch-shaped battery cell 20. Optionally, in one embodiment, the first elastic member 40 is partially located between the first housing wall 33 and the pouch-shaped battery cell 20.

[0082] It is understood that, in one embodiment, the electrical device is a vehicle 1000, and a housing 30 can accommodate at least one pouch-shaped battery cell 20. The housing 10 may include a base plate 14, which is disposed on one side of the pouch-shaped battery cell 20 in a first direction F1. A portion of the side of the base plate 14 facing the pouch-shaped battery cell 20 forms an inner bottom wall 13. Multiple housings 30 may be arranged along the front-rear direction and / or left-right direction of the vehicle 1000 and connected to the inner bottom wall 13. The first opening 32 of the housing 30 faces downwards from the vehicle 1000 and towards the inner bottom wall 13. Exemplarily, a limiting groove is provided on the inner bottom wall 13, and the housing end wall at the first opening 32 of the housing 30 can be inserted into the limiting groove to connect to the inner bottom wall 13.

[0083] The material of the housing 30 may include, but is not limited to, metallic materials. The material of the first elastic element 40 may include, but is not limited to, foam, cushioning pad, metal foam, engineering plastics, etc.

[0084] With the first elastic member 40 located at least partially between the first housing wall 33 and the pouch-shaped battery cell 20, it can buffer the vibration force in the first direction F1 when the battery device 100 is subjected to external vibration or impact, thereby reducing the displacement of the pouch-shaped battery cell 20 in the first direction F1 to a certain extent, effectively preventing the colloid 60 from cracking or the pouch-shaped battery cell 20 from breaking, thus extending the service life of the battery device 100 and improving the reliability of the electric vehicle.

[0085] Specifically, in Figures 2 to 4, the first direction F1 is the vertical direction. The direction perpendicular to the first direction F1 is the second direction F2, which is the horizontal direction. On the first direction F1, one side of the housing 30 has a first opening 32 facing the inner bottom wall 13, and the other side of the housing 30 is a first housing wall 33. The pouch-shaped battery cell 20 is accommodated in the receiving cavity 31 of the housing 30, and the first elastic member 40 is at least partially located between the first housing wall 33 and the pouch-shaped battery cell 20.

[0086] When the battery device 100 is subjected to external vibration or impact, the first elastic element 40 absorbs and disperses the vibration energy, thereby reducing the intensity of the vibration force acting directly on the pouch-shaped battery cell 20 and providing a significant buffering effect. This buffering effect reduces the impact of vibration on the internal structure of the battery device 100, thus enhancing the shock resistance of the battery device 100.

[0087] The cushioning effect of the first elastic element 40 reduces the displacement of the pouch battery cell 20 in the first direction F1, thereby effectively controlling the up-and-down movement of the pouch battery cell 20 in the first direction F1 and avoiding unnecessary relative displacement of the pouch battery cell 20 within the housing 30 due to vibration. This improves the stability of the pouch battery and reduces the risk of the pouch battery cell 20 becoming loose or shifting.

[0088] The pouch-shaped battery cell 20 is bonded to the inner bottom wall 13 of the housing 10 by an adhesive 60. Under vibration conditions, frequent vertical displacement may exert significant stress on the adhesive layer of the adhesive 60, leading to cracking or failure. The first elastic element 40 can effectively mitigate the displacement tendency of the pouch-shaped battery cell 20, and to a certain extent avoid excessive mechanical stress acting directly on the adhesive layer of the adhesive 60, thereby preventing the adhesive 60 from cracking. In addition, maintaining the integrity of the adhesive 60 also means that the pouch-shaped battery cell 20 can continue to receive stable support and will not suffer direct physical damage or breakage due to damage to the adhesive 60.

[0089] According to some embodiments of this application, optionally, referring to FIG3, the first elastic member 40 abuts against the pouch-shaped battery cell 20 and the first housing wall 33 on both sides along the first direction F1.

[0090] By having the first elastic member 40 abut against the pouch-shaped battery cell 20 and the first housing wall 33 respectively, when the pouch-shaped battery cell 20 is subjected to vibration impact along the first direction F1, it can contact the first elastic member 40 and restrict its displacement when the pouch-shaped battery cell 20 has an upward tendency to move.

[0091] According to some embodiments of this application, optionally, referring to FIG3, the first elastic member 40 connects the pouch-shaped battery cell 20 to the first housing wall 33 via adhesive backing.

[0092] The adhesive backing is a thin, sticky material that can be applied to the surface of the first elastic member 40, the surface of the pouch-shaped battery cell 20, or the surface of the first housing wall 33, so that the first elastic member 40 can connect the pouch-shaped battery cell 20 and the first housing wall 33 through the adhesive backing. For example, double-sided adhesive can be used to bond the first elastic member 40, the pouch-shaped battery cell 20, and the first housing wall 33.

[0093] By using adhesive backing to connect the first elastic element 40, the pouch-shaped battery cell 20, and the first housing wall 33, these components can be tightly fitted together, ensuring their stability after assembly. When the battery device 100 is subjected to external impact or vibration, the various parts remain fixed and are not easily loosened.

[0094] According to some embodiments of this application, optionally, the elastic modulus of the material of the first elastic member 40 is K, where 0.1 GPa < K < 1 GPa.

[0095] Elastic modulus is a physical quantity that measures a material's resistance to elastic deformation. It reflects the stiffness of a material under stress and deformation, that is, the material's ability to undergo a unit strain under a unit stress. The higher the elastic modulus, the more rigid the material and the less likely it is to deform; the lower the elastic modulus, the softer the material and the more easily it deforms. The unit of elastic modulus is usually Pascal (Pa), but in practical applications it is often expressed in megapascals (MPa) or gigapascals (GPa).

[0096] In some examples, the elastic modulus K of the first elastic element 40 is 0.2 GPa, 0.3 GPa, 0.4 GPa, 0.5 GPa, 0.6 GPa, 0.7 GPa, 0.8 GPa, 0.9 GPa, or other values ​​greater than 0.1 GPa and less than 1 GPa.

[0097] By setting the elastic modulus K of the first elastic element 40 to satisfy 0.1Gpa < K < 1Gpa, the first elastic element 40 can be given appropriate flexibility, which can effectively buffer external vibrations without losing its supporting function due to excessive softness. Thus, when the battery device 100 is subjected to vibration or impact, it can provide sufficient buffering force for the pouch-shaped battery cell 20, reduce displacement and movement, and protect the battery device 100.

[0098] According to some embodiments of this application, optionally, the thickness dimension of the first elastic member 40 along the first direction F1 is D, where 0.2mm≤D≤10mm (millimeters).

[0099] The thickness of the first elastic element 40 affects the buffer space and isolation effect it provides in the battery device 100. If the thickness D of the first elastic element 40 is too small, it will be difficult to effectively limit the displacement of the pouch-shaped battery cell 20 along the first direction F1. Furthermore, if the thickness D of the first elastic element 40 is too small, it will also affect the deformability of the first elastic element 40 and its ability to absorb vibration and shock. If the thickness D of the first elastic element 40 is too large, it will occupy more internal space of the energy unit 70, affecting the energy density.

[0100] In some examples, the thickness D of the first elastic element 40 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 9.5 mm, 9.8 mm, 10 mm, or other values ​​greater than or equal to 0.2 mm and less than or equal to 10 mm.

[0101] The thickness D of the first elastic element 40 satisfies 0.2mm≤D≤10mm, which ensures that the first elastic element 40 is neither too thin to effectively buffer, nor too thick to occupy too much internal space of the housing 30.

[0102] Optionally, according to some embodiments of this application, referring to FIG5, the pouch-shaped battery cell 20 includes a first electrode lead-out portion 21 and a second electrode lead-out portion 22 with opposite polarities. One of the first electrode lead-out portion 21 and the second electrode lead-out portion 22 is electrically connected to the housing 30. The first elastic member 40 includes an insulating layer or an insulating shell.

[0103] The first electrode lead-out portion 21 and the second electrode lead-out portion 22 refer to the portions of the electrode assembly in the pouch-shaped battery cell 20 that extend out of the pouch-shaped housing.

[0104] The insulating layer refers to the first elastic element 40 having a multi-layer structure, including at least one layer of insulating material; the insulating shell refers to the first elastic element 40 having a shell body that encloses internal functional materials, wherein the shell body is made of insulating material, and the functional material can be flame-retardant material, phase change material, elastic material, or other materials that achieve other functions. The insulating layer or insulating shell is used to enable the first elastic element 40 to insulatingly separate the pouch-shaped battery cell 20 and the casing 30.

[0105] According to some embodiments of this application, optionally, referring to Figures 3 and 4, the end of the housing 30 near the first opening 32 is provided with a limiting structure 34, and the pouch-shaped battery cell 20 is located between the first elastic member 40 and the limiting structure 34.

[0106] Specifically, the opening end of the housing 30 is bent inward to form a protrusion, which forms a limiting structure 34. The limiting structure 34 can support the pouch-shaped battery cell 20 in the first direction F1, thereby further limiting the position of the pouch-shaped battery cell 20 in the first direction F1 and reducing the displacement of the pouch-shaped battery cell 20 in the first direction F1 under vibration conditions to a certain extent.

[0107] By providing a limiting structure 34 at the end of the housing 30 near the first opening 32, the pouch-shaped battery cell 20 is located between the first elastic member 40 and the limiting structure 34, which can prevent or reduce the displacement of the pouch-shaped battery cell 20 in the first direction F1 to a certain extent, further improve the vibration buffering effect, extend the service life of the battery device 100, and enhance the structural stability of the battery device 100.

[0108] Optionally, according to some embodiments of this application, referring to FIG4, the housing 30 includes two second openings 36 opposite each other along a second direction F2, a first opening 32 located on one side of the two second openings 36 along a first direction F1 and communicating with the two first openings 32, the second direction F2 intersecting the first direction F1.

[0109] The side of the housing 30 on the third direction F3 is a second housing wall 35; the third direction F3 is perpendicular to the plane formed by the first direction F1 and the second direction F2; the battery device includes a second elastic member 50, which is disposed inside the housing 30 and is at least partially located between the second housing wall 35 and the pouch-shaped battery cell 20.

[0110] The second elastic member 50 is disposed within the housing 30, at least partially located between the second housing wall 35 and the pouch-shaped battery cell 20. Optionally, in one embodiment, the second elastic member 50 is completely located between the second housing wall 35 and the pouch-shaped battery cell 20. Optionally, in one embodiment, the second elastic member 50 is partially located between the second housing wall 35 and the pouch-shaped battery cell 20.

[0111] By positioning the second elastic member 50 between the second housing wall 35 and the pouch-shaped battery cell 20, the second elastic member 50 can be compressed and deformed when the pouch-shaped battery cell 20 expands, thereby providing space for the pouch-shaped battery cell 20 to expand outward and reduce the outward deformation of the energy unit 70 due to the expansion of the pouch-shaped battery cell 20.

[0112] Understandably, in one embodiment, the electrical device is a vehicle 1000, and a housing 30 can accommodate at least one pouch-shaped battery cell 20. The housing 10 may include a base plate 14 disposed on one side of the pouch-shaped battery cell 20 in a first direction F1. A portion of the side of the base plate 14 facing the pouch-shaped battery cell 20 forms an inner bottom wall 13. Multiple housings 30 may be arranged along the longitudinal and / or lateral directions of the vehicle 1000 and connected to the inner bottom wall 13. The openings 32 of the housings 30 face downwards from the vehicle 1000 and towards the inner bottom wall 13. Exemplarily, a limiting groove is provided on the inner bottom wall 13, and the open end of the housing 30 can be inserted into the limiting groove to connect to the inner bottom wall 13.

[0113] The materials of the second elastic element 50 include, but are not limited to, foam, cushioning pad, metal foam, engineering plastics, etc.

[0114] On the third-direction F3, the two sides of the housing 30 are the second housing walls 35. The pouch-shaped battery cell 20 is accommodated in the receiving cavity 31 of the housing 30, and the second elastic member 50 is disposed between the second housing wall 35 and the pouch-shaped battery cell 20.

[0115] When the battery device 100 is subjected to external vibration or impact, the second elastic element 50 absorbs and disperses the vibration energy, thereby reducing the intensity of the vibration force acting directly on the pouch-shaped battery cell 20 and providing a significant buffering effect. This buffering effect reduces the impact of vibration on the internal structure of the battery device 100, thus enhancing the shock resistance of the battery device 100.

[0116] The buffering effect of the second elastic element 50 can reduce the displacement of the pouch battery cell 20 in the third direction F3, thereby effectively controlling the left and right movement of the pouch battery cell 20 in the third direction F3 and avoiding unnecessary relative displacement of the pouch battery cell 20 in the housing 30 due to vibration. In this way, the stability of the pouch battery can be improved and the risk of the pouch battery cell 20 becoming loose or shifting can be reduced.

[0117] The pouch-shaped battery cell 20 is bonded to the inner bottom wall 13 of the housing 10 by an adhesive 60. Under vibration conditions, frequent lateral displacement may exert significant stress on the adhesive layer of the adhesive 60, leading to cracking or failure. The second elastic element 50 can effectively mitigate the displacement tendency of the pouch-shaped battery cell 20, and to a certain extent avoid excessive mechanical stress acting directly on the adhesive layer of the adhesive 60, thereby preventing the adhesive 60 from cracking. In addition, maintaining the integrity of the adhesive 60 also means that the pouch-shaped battery cell 20 can continue to receive stable support and will not suffer direct physical damage or breakage due to damage to the adhesive 60.

[0118] According to some embodiments of this application, optionally, referring to FIG4, the second elastic member 50 connects the pouch-shaped battery cell 20 to the second housing wall 35 via an adhesive backing.

[0119] The adhesive backing is a thin, sticky material that can be applied to the surface of the second elastic member 50, the surface of the pouch-shaped battery cell 20, or the surface of the second housing wall 35, so that the second elastic member 50 can be connected to the pouch-shaped battery cell 20 and the second housing wall 35 via the adhesive backing. For example, double-sided adhesive can be used to bond the second elastic member 50, the pouch-shaped battery cell 20, and the second housing wall 35.

[0120] By using adhesive backing to connect the second elastic element 50, the pouch-shaped battery cell 20, and the second housing wall 35, the second elastic element 50, the pouch-shaped battery cell 20, and the second housing wall 35 can be tightly fitted together, ensuring the stability of these components after assembly. When the battery device 100 is subjected to external impact or vibration, the parts can still remain fixed and are not easily loosened.

[0121] According to some embodiments of this application, optionally, the elastic modulus of the second elastic member 50 is greater than the elastic modulus of the first elastic member 40.

[0122] Optionally, in practical applications, when the electrical device is a vehicle 1000, a housing 30 can accommodate at least one pouch-shaped battery cell 20. In Figure 2, a housing contains four pouch-shaped battery cells 20.

[0123] The housing 10 has an inner bottom wall 13. Multiple housings 30 can be arranged along the front-rear direction and / or left-right direction of the electric vehicle and connected to the inner bottom wall 13. The openings 32 of the housings 30 face downwards from the electric vehicle and the inner bottom wall 13. For example, the inner bottom wall 13 is provided with a limiting groove, and the open end of the housing 30 can be inserted into the limiting groove to connect to the inner bottom wall 13.

[0124] Optionally, in Figure 2, multiple housings 30 are closely arranged in the front-rear and / or left-right directions of the electric vehicle, and are in close contact with each other to form a mutual support effect. When external vibrations act along the front-rear and / or left-right directions of the electric vehicle, the close arrangement between the housings 30 will offset some of the vibrations.

[0125] Referring to Figure 4, in the battery device 100, the first elastic member 40 is at least partially located between the first housing wall 33 and the pouch-shaped battery cell 20, and the second elastic member 50 is at least partially located between the second housing wall 35 and the pouch-shaped battery cell 20. The first elastic member 40 can mitigate vibrations and impacts in the first direction F1, and the second elastic member 50 can mitigate vibrations and impacts in the third direction F3.

[0126] In this embodiment, the third direction F3 can be the front-to-back direction and / or the left-to-right direction of the electric vehicle. Since the close arrangement between the housings 30 will cancel out some of the vibration in the third direction F3, the pouch-shaped battery cell 20 is more likely to be displaced by vibration and impact in the first direction F1. The elastic modulus of the first elastic member 40 used to reduce vibration and impact in the first direction F1 can be less than the elastic modulus of the second elastic member 50. That is, the elastic modulus of the first elastic member 40 is lower, the material is softer, it is easier to deform, and the impact resistance is stronger. The elastic modulus of the second elastic member 50 is higher, the material is more rigid, it is more difficult to deform, and the impact resistance is weaker.

[0127] According to some embodiments of this application, optionally, the elastic modulus of the material of the second elastic member 50 is F, where 0.1 GPa < F < 1 GPa.

[0128] Elastic modulus is a physical quantity that measures a material's resistance to elastic deformation. It reflects the stiffness of a material under stress and deformation, that is, the material's ability to undergo a unit strain under a unit stress. The higher the elastic modulus, the more rigid the material and the less likely it is to deform; the lower the elastic modulus, the softer the material and the more easily it deforms. The unit of elastic modulus is usually Pascal (Pa), but in practical applications it is often expressed in megapascals (MPa) or gigapascals (GPa).

[0129] It is understandable that the elastic modulus of the second elastic element 50 is greater than that of the first elastic element 40. In one example, the elastic modulus of the first elastic element 40 is 0.5 GPa, then the elastic modulus of the second elastic element 50 can be any value greater than 0.5 GPa and less than 1 GPa.

[0130] In some examples, the elastic modulus of the material of the second elastic element 50 is F = 0.2 GPa, 0.3 GPa, 0.4 GPa, 0.5 GPa, 0.6 GPa, 0.7 GPa, 0.8 GPa, 0.9 GPa, or other values ​​greater than 0.1 GPa and less than 1 GPa.

[0131] By setting the elastic modulus F of the material of the second elastic element 50 to satisfy 0.1Gpa < K < 1Gpa, the second elastic element 50 can be given appropriate flexibility, which can effectively buffer external vibrations without losing its supporting function due to excessive softness. Thus, when the battery device 100 is subjected to vibration or impact, it can provide sufficient buffering force for the pouch-shaped battery cell 20, reduce displacement and movement, and protect the battery device 100.

[0132] According to some embodiments of this application, optionally, the pouch-shaped battery cell 20 includes a first electrode lead-out portion 21 and a second electrode lead-out portion 22 with opposite polarities, one of the first electrode lead-out portion 21 and the second electrode lead-out portion 22 being electrically connected to the housing 30, and the second elastic member 50 including an insulating layer or an insulating shell.

[0133] The insulating layer refers to the second elastic element 50 having a multi-layer structure and including at least one layer of insulating material; the insulating shell refers to the second elastic element 50 having a structure in which the internal functional material is enclosed by an outer shell, wherein the outer shell is made of an insulating material, and the functional material can be a flame-retardant material, a phase change material, an elastic material, or other materials that achieve other functions. The insulating layer or insulating shell is used to enable the second elastic element 50 to insulatingly separate the pouch-shaped battery cell 20 and the casing 30.

[0134] According to some embodiments of this application, optionally, the pouch-shaped battery cell 20 adjacent to the second elastic member 50 includes a pouch-shaped housing and an electrode assembly, the electrode assembly being located in the pouch-shaped housing and projected onto the first housing wall 33 along a third direction F3, the projection of the second elastic member 50 completely covering the projection of the electrode assembly.

[0135] Complete projection coverage means that when projecting along the third direction F3 onto the first housing wall 33, the projection of the second elastic element 50 can coincide with the projection of the electrode assembly, or the projection of the second elastic element 50 can completely cover the projection beyond the electrode assembly.

[0136] By ensuring that the projection of the second elastic element 50 completely covers the projection of the electrode assembly, stress concentration can be avoided due to uneven force distribution at that location caused by the projection edge of the second elastic element 50 being inside the outer contour of the electrode assembly, thereby improving the reliability of the battery device.

[0137] According to some embodiments of this application, optionally, the thickness of the second elastic member 50 is less than the thickness of the first elastic member 40.

[0138] In practical applications, when the electrical device is a vehicle 1000, the battery device 100 includes a housing 10, at least one casing 30, and at least one pouch-shaped battery cell 20. A casing 30 can accommodate at least one pouch-shaped battery cell 20.

[0139] The housing 10 has an inner bottom wall 13. Multiple housings 30 can be arranged along the front-rear direction and / or left-right direction of the electric vehicle and connected to the inner bottom wall 13. The openings 32 of the housings 30 face downwards from the electric vehicle and the inner bottom wall 13. For example, the inner bottom wall 13 is provided with a limiting groove, and the open end of the housing 30 can be inserted into the limiting groove to connect to the inner bottom wall 13.

[0140] Multiple housings 30 are closely arranged in the front-rear and / or left-right directions of the electric vehicle, and are in close contact with each other to form a mutual support effect. When external vibrations act along the front-rear and / or left-right directions of the electric vehicle, the close arrangement between the housings 30 will offset some of the vibrations.

[0141] In the battery device 100, a first elastic member 40 is at least partially located between a first housing wall 33 and a pouch-shaped battery cell 20, and a second elastic member 50 is at least partially located between a second housing wall 35 and a pouch-shaped battery cell 20. The first elastic member 40 can mitigate vibrations and impacts in a first direction F1, and the second elastic member 50 can mitigate vibrations and impacts in a third direction F3.

[0142] In this embodiment, the third direction F3 can be the front-to-back direction and / or the left-to-right direction of the electric vehicle. Since the close arrangement between the housings 30 will cancel out some of the vibration in the third direction F3, the pouch-shaped battery cell 20 is more likely to be displaced by vibration and impact in the first direction F1. The thickness of the first elastic member 40 used to reduce vibration and impact in the first direction F1 can be greater than the thickness of the second elastic member 50. That is, the thickness of the first elastic member 40 is larger, which can provide stronger support and vibration absorption capabilities, while the thickness of the second elastic member 50 is smaller, which can provide weaker support and vibration absorption capabilities.

[0143] By setting the thickness of the second elastic element 50 to be less than that of the first elastic element 40, the second elastic element 50 has a weaker ability to support and absorb vibrations than the first elastic element 40. Since impacts in the first direction F1 occur more frequently or are stronger in the application scenarios of the battery device 100, the first elastic element 40 has a stronger ability to support and absorb vibrations. It can be configured according to the application scenarios of the battery device 100, thereby optimizing the vibration buffering effect, rationally allocating materials, reducing the overall weight of the battery device 100, and improving the structural stability and service life of the battery device 100.

[0144] According to some embodiments of this application, optionally, the thickness of the second elastic member 50 is S, where 0.2mm ≤ S ≤ 10mm.

[0145] The thickness of the second elastic member 50 can be the size of the second elastic member 50 along the first direction. The thickness of the second elastic member 50 determines the buffer space and isolation effect provided by the second elastic member 50 in the battery device 100.

[0146] In some examples, the thickness S of the second elastic element 50 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 9.5 mm, 9.8 mm, 10 mm, or other values ​​greater than or equal to 0.2 mm and less than or equal to 10 mm.

[0147] It is understandable that the thickness of the second elastic element 50 is less than the thickness of the first elastic element 40. In one example, the thickness of the first elastic element 40 is 8 mm, then the thickness of the second elastic element 50 can be any other value greater than or equal to 0.2 mm and less than 8 mm.

[0148] By setting the thickness S of the second elastic element 50 to satisfy 0.2mm≤S≤10mm, the second elastic element 50 can be made neither too thin to effectively buffer, nor too thick to occupy too much internal space of the housing 30.

[0149] According to some embodiments of this application, optionally, referring to Figures 3 and 4, the inner bottom wall 13 is provided with a water cooling channel 131, and the opening 32 faces the water cooling channel 131.

[0150] The water-cooling channel 131 provides a passage 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 via the gel 60 and the casing 30. The flowing cooling fluid carries away the heat transferred by the gel 60 and the casing 30, achieving heat dissipation from the pouch cell 20. In the battery device 100, the water-cooling channel 131 can be arranged 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.

[0151] The inner bottom wall 13 is provided with a water cooling channel 131, and the opening 32 faces the water cooling channel 131, 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.

[0152] According to some embodiments of this application, optionally, colloid 60 is thermally conductive.

[0153] In the battery assembly 100, the pouch-shaped battery cells 20 are connected to the inner bottom wall 13 of the housing 10 via a gel 60. The heat generated by the pouch-shaped battery cells 20 can be conducted to the inner bottom wall 13 through the gel 60, so that the heat can be carried away by the water cooling channels 131 on the inner bottom wall 13, maintaining the pouch-shaped battery cells 20 within a suitable temperature range, which helps to avoid battery performance degradation, overheating, or even thermal runaway caused by excessively high temperatures.

[0154] By setting the colloid 60 to have thermal conductivity, the heat generated by the pouch cell 20 can be conducted to the inner bottom wall 13, thereby allowing the heat to quickly enter the water cooling channel 131, which improves the heat dissipation efficiency to a certain extent, keeps the temperature of the pouch cell 20 stable, and effectively avoids overheating problems.

[0155] Colloid 60 includes, but is not limited to, thermally conductive adhesives, structural adhesives, AB adhesives, or black adhesives.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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).

[0161] 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.).

[0162] 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.

[0163] 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.

[0164] 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 0.1 The composition of O2 is 96 parts, the composition of adhesive is 2.5 parts, and the composition of conductive agent is 1.5 parts.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] In one embodiment, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0170] In one embodiment, the energy storage device 1 may include a cabinet and one or more battery clusters, with the battery clusters housed in the cabinet.

[0171] In one embodiment, 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] As an example, the fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system 2000.

[0176] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0177] According to some embodiments of this application, 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.

[0178] The energy storage system 2000 may include one or more energy storage devices 1 and a power converter system (PCS), wherein the power converter system 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 converter system 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.

[0179] 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.

[0180] According to some embodiments of this application, 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.

[0181] 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 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.

[0182] 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.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: The box has an inner bottom wall; An energy unit includes a pouch-shaped battery cell and a housing. The housing has a receiving cavity, and a first opening is provided on one side of the housing facing a first direction. The first opening faces the inner bottom wall. The pouch-shaped battery cell is housed in the receiving cavity, and the pouch-shaped battery cell is bonded to the inner bottom wall at the first opening by an adhesive. The other side of the housing facing the first direction is a first housing wall. A first elastic element is disposed within the housing and is at least partially located between the first housing wall and the pouch-shaped battery cell.

2. The battery device according to claim 1, characterized by The first elastic member abuts against the pouch-shaped battery cell and the first housing wall on both sides along the first direction, respectively.

3. The battery device according to claim 1 or 2, characterized by, The first elastic element connects the pouch-shaped battery cell to the first housing wall via adhesive backing.

4. The battery device according to any one of claims 1 to 3, characterized by, The elastic modulus of the material of the first elastic element is K, where 0.1 GPa < K < 1 GPa.

5. The battery device according to any one of claims 1 to 4, characterized by, The thickness of the first elastic element along the first direction is D, where 0.2mm≤D≤10mm.

6. The battery device according to any one of claims 1 to 5, wherein The pouch-shaped battery cell includes a first electrode lead and a second electrode lead with opposite polarities. One of the first electrode lead and the second electrode lead is electrically connected to the housing. The first elastic element includes an insulating layer or an insulating outer shell.

7. The battery device according to any one of claims 1 to 6, wherein The first housing wall is provided with a pressure relief structure, and the first elastic element is spaced apart from the pressure relief structure.

8. The battery device according to any one of claims 1 to 7, wherein The end of the housing near the first opening is provided with a limiting structure, and the pouch-shaped battery cell is located between the first elastic member and the limiting structure.

9. The battery device according to any one of claims 1 to 8, characterized by, The housing includes two second openings opposite each other along a second direction, and a first opening is located on one side of the two second openings along the first direction and communicates with the two first openings. The second direction intersects the first direction. The housing has a second shell wall on a third-direction side; the third-direction is perpendicular to the plane formed by the first direction and the second direction; the battery device includes a second elastic member, which is disposed inside the housing and is at least partially located between the second shell wall and the pouch-shaped battery cell.

10. The battery device of claim 9, wherein, The second elastic element connects the pouch-shaped battery cell to the second shell wall via adhesive backing.

11. The battery device according to claim 9 or 10, characterized by The elastic modulus of the second elastic element is greater than that of the first elastic element.

12. The battery device according to any one of claims 9 to 11, wherein The elastic modulus of the material of the second elastic element is F, where 0.1 GPa < F < 1 GPa.

13. The battery device according to any one of claims 9 to 12, wherein The pouch-shaped battery cell includes a first electrode lead and a second electrode lead with opposite polarities. One of the first electrode lead and the second electrode lead is electrically connected to the housing. The second elastic element includes an insulating layer or an insulating outer shell.

14. The battery device according to any one of claims 9 to 13, wherein The pouch-shaped battery cell adjacent to the second elastic member includes a pouch-shaped outer shell and an electrode assembly. The electrode assembly is located in the pouch-shaped outer shell and projects onto the first shell wall along the third direction. The projection of the second elastic member completely covers the projection of the electrode assembly.

15. The battery device according to any one of claims 9-14, characterized in that, The thickness of the second elastic element is less than the thickness of the first elastic element.

16. The battery device according to any one of claims 9-15, characterized in that, The thickness of the second elastic element is S, where 0.2mm ≤ S ≤ 10mm.

17. The battery device according to any one of claims 1-16, characterized in that, The inner bottom wall is provided with a water-cooling channel, and the opening faces the water-cooling channel.

18. The battery device according to any one of claims 1-17, characterized in that, The colloid is thermally conductive.

19. The battery device according to any one of claims 1-17, 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, It includes a plurality of battery devices as described in claim 19, the battery devices 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, or an energy storage device as claimed in claim 20, or an energy storage system as claimed in 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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