Battery device, energy storage device, energy storage system, power utilization device and charging network

Abstract

The utility model discloses a battery device, an energy storage device, an energy storage system, a power utilization device and a charging network. The battery device comprises a box body with an inner bottom wall; the energy unit comprises a bag-shaped single battery and a shell, a containing cavity is formed in the shell, a first opening is formed in the side face, facing the first direction, of the shell, the first opening faces the inner bottom wall, the bag-shaped single battery is contained in the containing cavity, the bag-shaped single battery is bonded to the inner bottom wall through glue at the first opening, and the first opening faces the inner bottom wall. The other side face, facing the first direction, of the shell is a first shell wall. And the first elastic piece is arranged in the shell and is at least partially positioned between the first shell wall and the bag-shaped battery monomer. According to the battery device provided by the embodiment of the invention, at least part of the first elastic piece is positioned between the first shell wall and the bag-shaped battery monomer, so that colloid cracking or damage of the bag-shaped battery monomer can be effectively prevented, the service life of the battery device is prolonged, and the reliability of the electric vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery device, an energy storage device, an energy storage system, an electrical device and a charging network. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The battery device may include a shell and multiple soft-pack battery cells. Since the shell opening faces downward to accommodate at least one soft-pack battery cell in the shell, under the vibration condition of the battery device, the soft-pack battery cell is prone to move up and down in the height direction, making it easy for the bottom colloid to crack after the soft-pack battery cell is displaced, and even causing the bag-shaped shell of the soft-pack battery cell to be damaged. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, an energy storage device, an energy storage system, an electrical device and a charging network, which can alleviate the problem that the bottom of the pouch-shaped battery cell is low and prone to cracking after displacement under the vibration condition of the battery device, and even cause the pouch-shaped battery cell to be damaged.

[0005] In a first aspect, the present application provides a battery device, the battery device comprising:

[0006] A box body having an inner bottom wall;

[0007] An energy unit, comprising a pouch-shaped battery cell and a shell, wherein a receiving cavity is provided in the shell, and a first opening is provided on a side of the shell facing a first direction, the first opening faces the inner bottom wall, the pouch-shaped battery cell is received in the receiving cavity, and the pouch-shaped battery cell is bonded to the inner bottom wall at the first opening by a colloid, and the other side of the shell facing the first direction is a first shell wall;

[0008] The first elastic member is disposed in the housing and at least partially located between the first housing wall and the pouch-shaped battery cell.

[0009] In the technical solution of the embodiment of the present application, the first elastic member is arranged in the shell and is at least partially located between the first shell wall and the pouch-shaped battery cell. When the battery device is subjected to external vibration or impact along the first direction, the displacement of the pouch-shaped battery cell in the first direction can be reduced to a certain extent. In addition, the first elastic member and the pouch-shaped battery cell are in elastic and soft contact, which effectively prevents the cracking of the colloid or the damage of the pouch-shaped battery cell, thereby extending the service life of the battery device and improving the reliability of the electric vehicle.

[0010] In some embodiments, two sides of the first elastic member along the first direction respectively abut against the pouch-shaped battery cell and the first housing wall.

[0011] In some embodiments, the first elastic member connects the pouch-shaped battery cell and the first housing wall via adhesive.

[0012] In some embodiments, the elastic modulus of the material of the first elastic member is K, 0.1 Gpa<K<1 Gpa.

[0013] In some embodiments, the thickness of the first elastic member is D, 0.2 mm≤D≤10 mm.

[0014] In some embodiments, the pouch-shaped battery cell includes a first electrode lead-out portion and a second electrode lead-out portion with opposite polarities, one of the first electrode lead-out portion and the second electrode lead-out portion is electrically connected to the housing, and the first elastic member includes an insulating layer or an insulating shell.

[0015] In some embodiments, a pressure relief structure is disposed on the first shell wall, and the first elastic member is spaced apart from the pressure relief structure.

[0016] In some embodiments, a limiting structure is provided at an end of the shell close to the first opening, and the pouch-shaped battery cell is located between the first elastic member and the limiting structure.

[0017] In some embodiments, the shell includes two second openings opposite to each other along a second direction, the first opening is located on one side of the two second openings along the first direction and connects the two first openings, the second direction intersects with the first direction, and the side of the shell in the third direction is a second shell wall; the third direction is perpendicular to the plane formed by the first direction and the second direction, and the battery device includes a second elastic member, which is disposed in the shell and at least partially located between the second shell wall and the pouch-shaped battery cell.

[0018] In some embodiments, the second elastic member is connected to the pouch-shaped battery cell and the second shell wall by adhesive.

[0019] In some embodiments, the elastic modulus of the second elastic member is greater than the elastic modulus of the first elastic member.

[0020] In some embodiments, the elastic modulus of the material of the second elastic member is F, 0.1 Gpa<F<1 Gpa.

[0021] In some embodiments, the pouch-shaped battery cell includes a first electrode lead-out portion and a second electrode lead-out portion with opposite polarities, one of the first electrode lead-out portion and the second electrode lead-out portion is electrically connected to the housing, and the second elastic member includes an insulating layer or an insulating shell.

[0022] In some embodiments, the pouch-shaped battery cell adjacent to the first elastic member includes a pouch-shaped outer shell and an electrode assembly, the electrode assembly is located in the pouch-shaped outer shell, and is projected toward the first shell wall along the third direction, and the projection of the second elastic member completely covers the projection of the electrode assembly.

[0023] In some embodiments, the second elastic member is insulating and flame-retardant to isolate the pouch-shaped battery cells from the second housing wall.

[0024] In some embodiments, a thickness of the second elastic member is smaller than a thickness of the first elastic member.

[0025] In some embodiments, the thickness of the second elastic member is S, 0.2 mm ≤ S ≤ 10 mm.

[0026] In some embodiments, the inner bottom wall is provided with a water cooling channel, and the opening faces the water cooling channel.

[0027] In some embodiments, the colloid is thermally conductive.

[0028] 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.

[0029] In a second aspect, the present application provides an energy storage device, which includes a plurality of battery devices in any of the above embodiments, and the battery devices are used to store or provide electrical energy.

[0030] In a third aspect, the present application provides an energy storage system, which includes a power conversion device and the energy storage device in the above embodiment, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0031] In a fourth aspect, the present application provides an electrical device, which includes a battery device, an energy storage device or an energy storage system in any of the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0032] In a fifth aspect, the present application provides a charging network, which includes a charging pile and an energy storage device or an energy storage system in the above embodiment, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0036] Figure 2 A schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0037] Figure 3 A partial cross-sectional structural schematic diagram of a battery device according to some embodiments of the present application;

[0038] Figure 4 A schematic diagram of a cross-sectional structure of another part of a battery device according to some embodiments of the present application;

[0039] Figure 5 It is a schematic diagram of an exploded view of a pouch-shaped battery cell according to some embodiments of the present application;

[0040] Figure 6 A schematic diagram of a module of an energy storage system according to some embodiments of the present application;

[0041] Figure 7 This is a module diagram of a charging network according to some embodiments of the present application.

[0042] The reference numerals in the specific implementation manner are as follows:

[0043] Vehicle 1000, energy storage system 2000, charging network 3000, energy storage device 1, power conversion equipment 2, power generation equipment 3, charging pile 4, connector 5;

[0044] Battery device 100, controller 200, motor 300;

[0045] Box body 10, first part 11, second part 12, inner bottom wall 13, bottom plate 14, water cooling channel 131;

[0046] A pouch-shaped battery cell 20, a first electrode lead-out portion 21, and a second electrode lead-out portion 22;

[0047] Shell 30, accommodating cavity 31, first opening 32, first shell wall 33, limiting structure 34, second shell wall 35, second opening 36;

[0048] A first elastic member 40;

[0049] A second elastic member 50;

[0050] Colloid 60;

[0051] Energy unit 70. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0061] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0062] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0063] In electric vehicle applications, the structural design of the battery device is crucial, especially the performance under dynamic conditions (such as vibration during driving) directly affects the service life and safety of the battery device. The battery device can be composed of a shell and multiple soft-pack battery cells. Compared with traditional hard-shell battery cells, soft-pack battery cells have the advantages of light weight and high density, but their internal structure is relatively fragile and sensitive to external vibrations. Soft-pack battery cells are mainly composed of a bag-shaped flexible shell and an electrode assembly. The mechanical strength of the overall structure is low. Under frequent vibration conditions, especially during the driving of the car, it is easy to shift or deform.

[0064] The inventor discovered during the design that when the opening of the shell faces downward and the soft-pack battery cells are placed vertically or stacked inside the shell, the shell can protect the soft-pack battery cells, but the soft-pack battery cells are prone to move up and down. The soft-pack battery cells naturally sink under the action of gravity. When the vibration during the vehicle's driving is transmitted to the battery device, these soft-pack battery cells are prone to relative movement in the height direction, that is, up and down movement. This up and down movement will have an adverse effect on the overall structure of the soft-pack battery cells.

[0065] The inventors further discovered during the design that the soft-pack battery cells can be bonded to the inner bottom wall of the box body through colloids to keep the position of the soft-pack battery cells stable. However, during repeated up and down vibrations, these colloid bonding parts will be subjected to greater mechanical stress, which can easily lead to loosening or cracking of the colloid layer. Once the colloid cracks, the fixing effect of the soft-pack battery cells fails, and the soft-pack battery cells may further displace or swing, creating the risk of mechanical damage. This damage may manifest as damage to the outer shell of the soft-pack battery cells, and may even affect the internal structure, leading to more serious safety hazards, such as electrolyte leakage or short circuit.

[0066] 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 the vibration condition of the battery device, and even causes the pouch-shaped battery cell to be damaged, the present application provides a battery device 100, by arranging a first elastic member 40 in the shell 30, and the first elastic member 40 is at least partially located between the first shell wall 33 of the shell 30 and the pouch-shaped battery cell 20, in order to effectively alleviate the problem of movement under vibration conditions. The function of the first elastic member 40 is to absorb and disperse part of the vibration force, play a buffering role, and thus reduce the displacement of the pouch-shaped battery cell 20 in the height direction.

[0067] The battery device 100 (Battery Apparatus) mentioned in the embodiment of the present application may include one or more pouch-shaped battery cell assemblies for providing voltage and capacity. The pouch-shaped battery cell assembly (Battery Cell Assembly) may include a plurality of pouch-shaped battery cells 20, and the plurality of pouch-shaped battery cells 20 are connected in series, in parallel, or in mixed series through a busbar component.

[0068] In some embodiments, a pouch-shaped battery cell assembly is generally formed by arranging a plurality of pouch-shaped battery cells 20 .

[0069] As an example, the pouch-shaped battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of pouch-shaped battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of pouch-shaped battery cells 20 by a cable tie.

[0070] In some embodiments, the battery device 100 may be a battery pack, which includes a case 10 and one or more pouch-shaped battery cell assemblies, wherein the pouch-shaped battery cell assemblies are accommodated in the case 10 .

[0071] As an example, the pouch-shaped battery cell assembly may be a battery module, and the pouch-shaped battery cell assembly may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0072] As an example, the pouch-shaped battery cell assembly may also be accommodated in the case 10 by directly fixing the plurality of pouch-shaped battery cells 20 to the case 10 .

[0073] As an example, combine Figure 2 The box 10 may include a first box 11 and a second box 12. The first box 11 and the second box 12 are buckled together to form a closed space inside the box 10 to accommodate the pouch-shaped battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0074] As an example, the box body 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 a closed space is formed inside the box body 10 to accommodate the pouch-shaped battery cell assembly.

[0075] In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle 1000. For example, part of the box 10 can become at least a part of the floor of the vehicle 1000, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0076] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using pouch-shaped battery cells 20, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0077] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0078] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0079] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] In the battery device 100, there may be multiple shells 30, and in one shell 30, there may be multiple pouch-shaped battery cells 20, and the multiple pouch-shaped battery cells 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple pouch-shaped battery cells 20 are both connected in series and in parallel. The multiple pouch-shaped battery cells 20 may be directly connected in series, in parallel, or in mixed connection, and the whole formed by the multiple pouch-shaped battery cells 20 may be accommodated in the shell 30; the multiple pouch-shaped battery cells 20 in the multiple shells 30 may be connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple pouch-shaped battery cells 20.

[0081] In the embodiment of the present application, the pouch-shaped battery cell 20 may be a secondary battery. A secondary battery refers to a pouch-shaped battery cell 20 that can be continuously used by activating active materials by charging after the pouch-shaped battery cell 20 is discharged.

[0082] The pouch-shaped battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0083] According to some embodiments of the present application, referring to Figure 3 , an embodiment of the present application provides a battery device 100. The battery device 100 includes a case 10, an energy unit 70, and the energy unit 70 includes a pouch-shaped battery cell 20, a shell 30 and a first elastic member 40. The case 10 has an inner bottom wall 13. A accommodating cavity 31 is provided in the shell 30, and the pouch-shaped battery cell 20 is accommodated in the accommodating cavity 31. A first opening 32 is provided on a side of the shell 30 facing the 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 a colloid 60. The other side of the shell 30 facing the first direction is a first shell wall 33. The first elastic member 40 is disposed in the shell 30 and is at least partially located between the first shell wall 33 and the pouch-shaped battery cell 20.

[0084] The box 10 is the main protection and containment structure of the entire battery device 100. It is a protective box 10 that can prevent the outside from directly affecting the inside of the battery device 100 to a certain extent. The box 10 has an inner bottom wall 13. The inner bottom wall 13 can be used to support the pouch-shaped battery cells 20 and provide a stable structural foundation for the battery device 100.

[0085] The energy unit 70 refers to a group unit formed by accommodating at least one pouch-shaped battery cell 20 in one housing 30, and a plurality of pouch-shaped battery cells 20 may be accommodated in one housing 30 at the same time. The energy unit 70 may have an electrode connection portion for electrically connecting to other devices or other energy units 70, and the electrode connection portion may be electrically connected to the pouch-shaped battery cell 20 in the housing 30.

[0086] The pouch-shaped battery cell 20 is a soft-pack battery cell shaped like a bag. Since it is sealed with a flexible packaging material (such as an aluminum-plastic film), the pouch-shaped battery cell 20 has the characteristics of light weight and high density. The pouch-shaped battery cell 20 is accommodated in the box 10 and fixed to the inner bottom wall 13 of the box 10 with a colloid 60 to ensure that the pouch-shaped battery cell 20 can maintain a stable position in the box 10.

[0087] The shell 30 is a direct accommodating structure for the pouch-shaped battery cell 20, and a accommodating cavity 31 is formed inside the shell 30 for accommodating and protecting the pouch-shaped battery cell 20. The first opening 32 on the shell 30 faces the inner bottom wall 13 of the box body 10. The pouch-shaped battery cell 20 is accommodated in the shell 30, and is bonded to the inner bottom wall 13 on the side of the first opening 32 of the shell 30 through the colloid 60. The shell 30 can provide support and protection to prevent the pouch-shaped battery cell 20 from being directly squeezed or collided with other components in the box body 10 and damaged.

[0088] The first elastic member 40 is disposed in the housing 30, and is 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.

[0089] It can be understood that, in one embodiment, the electric device is a vehicle 1000, and one housing 30 can accommodate at least one pouch-shaped battery cell 20. The box body 10 may include a bottom plate 14, which is disposed on one side of the pouch-shaped battery cell 20 in the first direction F1, and a portion of the side of the bottom plate 14 facing the pouch-shaped battery cell 20 is an inner bottom wall 13, and a plurality of housings 30 may be arranged along the front-to-back direction and / or the left-to-right direction of the vehicle 1000 and connected to the inner bottom wall 13, and the first opening 32 of the housing 30 faces the bottom of the vehicle 1000 and 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 may be inserted into the limiting groove to connect to the inner bottom wall 13.

[0090] The material of the housing 30 may include but is not limited to metal materials. The material of the first elastic member 40 may include but is not limited to foam, cushion, metal foam, engineering plastics, and the like.

[0091] By at least partially positioning the first elastic member 40 between the first shell wall 33 and the pouch-shaped battery cell 20, when the battery device 100 is subjected to external vibration or impact, the vibration force can be buffered in the first direction F1, thereby reducing the displacement of the pouch-shaped battery cell 20 in the first direction F1 to a certain extent, and effectively preventing the colloid 60 from cracking or the pouch-shaped battery cell 20 from being damaged, thereby extending the service life of the battery device 100 and improving the reliability of the electric vehicle.

[0092] Specifically, in Figures 2 to 4In the embodiment, the first direction F1 is a vertical direction. The direction perpendicular to the first direction F1 is a second direction F2, and the second direction F2 is a horizontal direction. In the first direction F1, a first opening 32 is provided on one side of the shell 30, and the first opening 32 faces the inner bottom wall 13, and the other side of the shell 30 is a first shell wall 33. The pouch-shaped battery cell 20 is accommodated in the accommodating cavity 31 of the shell 30, and the first elastic member 40 is at least partially located between the first shell wall 33 and the pouch-shaped battery cell 20.

[0093] When the battery device 100 is subjected to external vibration or impact, the first elastic member 40 plays a role in absorbing and dispersing vibration energy, thereby reducing the intensity of the vibration force directly acting on the pouch-shaped battery cell 20, and playing a significant buffering effect. This buffering effect reduces the impact of vibration on the internal structure of the battery device 100, thereby enhancing the anti-seismic performance of the battery device 100.

[0094] Through the buffering effect of the first elastic member 40, the displacement of the pouch-shaped battery cell 20 in the first direction F1 is reduced, thereby effectively controlling the up and down movement of the pouch-shaped battery cell 20 in the first direction F1 and avoiding unnecessary relative displacement of the pouch-shaped battery cell 20 in the shell 30 due to vibration. In this way, the stability of the pouch-shaped battery can be improved and the risk of loosening or displacement of the pouch-shaped battery cell 20 can be reduced.

[0095] The pouch-shaped battery cell 20 is bonded to the inner bottom wall 13 of the box body 10 by the colloid 60. Under vibration conditions, frequent up and down displacement may exert greater stress on the adhesive layer of the colloid 60, resulting in cracking or failure. The first elastic member 40 can effectively slow down the displacement trend of the pouch-shaped battery cell 20, and to a certain extent avoid excessive mechanical stress directly acting on the adhesive layer of the colloid 60, thereby preventing the colloid 60 from cracking. In addition, the integrity of the colloid 60 also means that the pouch-shaped battery cell 20 can continue to be firmly supported, and will not cause direct physical damage or rupture due to damage to the colloid 60.

[0096] According to some embodiments of the present application, optionally, please combine Figure 3 The first elastic member 40 abuts against the pouch-shaped battery cell 20 and the first housing wall 33 at two sides along the first direction F1 .

[0097] By making 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 a vibration impact along the first direction F1 , the pouch-shaped battery cell 20 can contact the first elastic member 40 and its displacement is limited when it tends to move upward.

[0098] According to some embodiments of the present application, optionally, please combine Figure 3 The first elastic member 40 connects the pouch-shaped battery cell 20 and the first shell wall 33 through adhesive.

[0099] The adhesive backing is a thin layer of material with stickiness and can be used for bonding, which 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 be connected to the pouch-shaped battery cell 20 and the first housing wall 33 through the adhesive backing. For example, the first elastic member 40, the pouch-shaped battery cell 20, and the first housing wall 33 can be bonded by double-sided adhesive.

[0100] The first elastic member 40, the pouch-shaped battery cell 20 and the first shell wall 33 are connected by adhesive, so that the first elastic member 40, the pouch-shaped battery cell 20 and the first shell wall 33 can be closely attached together, ensuring the stability of these components after assembly. When the battery device 100 is subjected to external impact or vibration, each part can still remain fixed and is not easy to loosen.

[0101] According to some embodiments of the present application, optionally, the elastic modulus of the material of the first elastic member 40 is K, 0.1 Gpa<K<1 Gpa.

[0102] Elastic modulus is a physical quantity that measures the material's ability to resist elastic deformation. It reflects the stiffness of a material when it is deformed by force, that is, the material's ability to produce unit strain under unit stress. The higher the elastic modulus, the more rigid the material is and the harder it is to deform; the lower the elastic modulus, the softer the material is and the easier it is to deform. The unit of elastic modulus is usually Pascal (Pa), and in practical applications it is often expressed in megapascals (MPa) or gigapascals (GPa).

[0103] In some examples, the material elastic modulus K of the first elastic member 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.

[0104] By setting the material elastic modulus K of the first elastic member 40 to satisfy 0.1 Gpa<K<1 Gpa, the first elastic member 40 can be given appropriate flexibility, which can effectively buffer external vibrations without losing its supporting function due to being too soft. Therefore, when the battery device 100 is vibrated or impacted, sufficient buffering force can be provided for the pouch-shaped battery cell 20, displacement and movement can be reduced, and the battery device 100 can be protected.

[0105] According to some embodiments of the present application, optionally, a thickness dimension of the first elastic member 40 along the first direction F1 is D, and 0.2 mm≤D≤10 mm (millimeter).

[0106] The thickness of the first elastic member 40 can affect the buffer space and isolation effect provided by the first elastic member 40 in the battery device 100. If the thickness dimension D of the first elastic member 40 is too small, it is difficult to effectively limit the displacement of the pouch-shaped battery cell 20 along the first direction F1. In addition, if the thickness dimension D of the first elastic member 40 is too small, it also affects the deformability of the first elastic member 40 and the effect of absorbing vibration and impact of the first elastic member 40. If the thickness dimension D of the first elastic member 40 is too large, it will occupy more internal space of the energy unit 70, affecting the energy density.

[0107] In some examples, the thickness D of the first elastic member 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.

[0108] The thickness D of the first elastic member 40 satisfies 0.2 mm≤D≤10 mm, so that the first elastic member 40 is neither too thin to effectively buffer nor too thick to occupy too much internal space of the housing 30 .

[0109] According to some embodiments of the present application, optionally, please combine Figure 5 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, and the first elastic member 40 includes an insulating layer or an insulating shell.

[0110] The first electrode lead-out portion 21 and the second electrode lead-out portion 22 refer to portions of the electrode assembly in the pouch-shaped battery cell 20 that extend out of the pouch-shaped case.

[0111] The insulating layer means that the first elastic member 40 may be a multi-layer structure and include at least one insulating material layer; the insulating shell means that the first elastic member 40 may be a structure in which the outer shell encloses the internal functional material, wherein the outer shell is made of insulating material, and the functional material may be a flame retardant material, a phase change material, an elastic material, or other material that realizes other functions. The insulating layer or insulating shell is used to allow the first elastic member 40 to insulate and separate the pouch-shaped battery cell 20 and the shell 30.

[0112] According to some embodiments of the present application, optionally, please combine Figure 3 and Figure 4 A limiting structure 34 is provided at the end of the shell 30 close to the first opening 32 , and the pouch-shaped battery cell 20 is located between the first elastic member 40 and the limiting structure 34 .

[0113] Specifically, the opening end of the shell 30 is bent inward to form a protrusion to form 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.

[0114] By providing a limiting structure 34 at the end of the shell 30 close to 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.

[0115] According to some embodiments of the present application, optionally, please combine Figure 4 The housing 30 includes two second openings 36 opposite to each other along the second direction F2. The first opening 32 is located on one side of the two second openings 36 along the first direction F1 and communicates with the two first openings 32. The second direction F2 intersects with the first direction F1.

[0116] The side surface of the shell 30 in the third direction F3 is a second shell wall 35; the third direction F3 is perpendicular to the plane formed by the first direction F1 and the second direction F2, and the battery device includes a second elastic member 50, which is arranged in the shell 30 and is at least partially located between the second shell wall 35 and the pouch-shaped battery cell 20.

[0117] The second elastic member 50 is disposed in the housing 30, and is 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.

[0118] By locating the second elastic member 50 between the second shell wall 35 and the pouch-shaped battery cell 20 , when the pouch-shaped battery cell 20 expands, the second elastic member 50 can be compressed and deformed to provide space for the pouch-shaped battery cell 20 to expand and deform outward, thereby reducing the outward deformation of the energy unit 70 caused by the expansion of the pouch-shaped battery cell 20 .

[0119] It can be understood that, in one embodiment, the electric device is a vehicle 1000, and one housing 30 can accommodate at least one pouch-shaped battery cell 20. The box 10 may include a bottom plate 14, which is disposed on one side of the pouch-shaped battery cell 20 in the first direction F1, and a portion of the side of the bottom plate 14 facing the pouch-shaped battery cell 20 is an inner bottom wall 13, and a plurality of housings 30 may be arranged along the front-to-back direction and / or the left-to-right direction of the vehicle 1000 and connected to the inner bottom wall 13, and the opening 32 of the housing 30 faces the bottom of the vehicle 1000 and 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.

[0120] The material of the second elastic member 50 includes, but is not limited to, foam, cushion, metal foam, engineering plastic, and the like.

[0121] In the third direction F3 , two side surfaces of the housing 30 are second housing walls 35 . The pouch-shaped battery cells 20 are accommodated in the accommodation chamber 31 of the housing 30 , and the second elastic member 50 is disposed between the second housing wall 35 and the pouch-shaped battery cells 20 .

[0122] When the battery device 100 is subjected to external vibration or impact, the second elastic member 50 plays a role in absorbing and dispersing vibration energy, thereby reducing the intensity of the vibration force directly acting on the pouch-shaped battery cell 20, and playing a significant buffering effect. This buffering effect reduces the impact of vibration on the internal structure of the battery device 100, thereby enhancing the anti-seismic performance of the battery device 100.

[0123] Through the buffering effect of the second elastic member 50, the displacement of the pouch-shaped battery cell 20 in the third direction F3 can be reduced, thereby effectively controlling the left and right movement of the pouch-shaped battery cell 20 in the third direction F3 and avoiding unnecessary relative displacement of the pouch-shaped battery cell 20 in the shell 30 due to vibration. In this way, the stability of the pouch-shaped battery can be improved and the risk of loosening or displacement of the pouch-shaped battery cell 20 can be reduced.

[0124] The pouch-shaped battery cell 20 is bonded to the inner bottom wall 13 of the box body 10 by the colloid 60. Under vibration conditions, frequent left and right displacements may exert greater stress on the adhesive layer of the colloid 60, resulting in cracking or failure. The second elastic member 50 can effectively slow down the displacement trend of the pouch-shaped battery cell 20, and to a certain extent avoid excessive mechanical stress directly acting on the adhesive layer of the colloid 60, thereby preventing the colloid 60 from cracking. In addition, the integrity of the colloid 60 also means that the pouch-shaped battery cell 20 can continue to be firmly supported, and will not cause direct physical damage or rupture due to damage to the colloid 60.

[0125] According to some embodiments of the present application, optionally, please combine Figure 4The second elastic member 50 connects the pouch-shaped battery cell 20 and the second shell wall 35 through adhesive.

[0126] The adhesive backing is a thin layer of material with stickiness and can be used for bonding, which 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 shell wall 35, so that the second elastic member 50 can be connected to the pouch-shaped battery cell 20 and the second shell wall 35 through the adhesive backing. For example, the second elastic member 50, the pouch-shaped battery cell 20 and the second shell wall 35 can be bonded by double-sided adhesive.

[0127] The second elastic member 50, the pouch-shaped battery cell 20 and the second shell wall 35 are connected by adhesive, so that the second elastic member 50, the pouch-shaped battery cell 20 and the second shell wall 35 can be closely attached together, ensuring the stability of these components after assembly. When the battery device 100 is subjected to external impact or vibration, each part can still remain fixed and is not easy to loosen.

[0128] According to some embodiments of the present application, optionally, the elastic modulus of the second elastic member 50 is greater than the elastic modulus of the first elastic member 40 .

[0129] Optionally, in practical applications, when the electric device is a vehicle 1000, one housing 30 can accommodate at least one pouch-shaped battery cell 20. Figure 2 In the embodiment, four pouch-shaped battery cells 20 are contained in one housing.

[0130] The box body 10 is provided with an inner bottom wall 13, and a plurality of housings 30 can be arranged along the front-to-back direction and / or the left-to-right direction of the electric vehicle and connected to the inner bottom wall 13, and the opening 32 of the housing 30 faces the bottom of the electric vehicle and 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.

[0131] Optionally, in Figure 2 In the embodiment, a plurality of housings 30 are closely arranged in the front-to-back direction and / or the left-to-right direction of the electric vehicle and are closely attached to each other to form a mutual support effect. When external vibration acts in the front-to-back direction and / or the left-to-right direction of the electric vehicle, the close arrangement of the housings 30 will offset part of the vibration.

[0132] Please combine 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 reduce vibration and impact in the first direction F1, and the second elastic member 50 can reduce vibration and impact in the third direction F3.

[0133] 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 shells 30 will offset part of the vibration in the third direction F3, the bag-shaped battery cell 20 is more likely to be displaced due to the vibration and impact in the first direction F1. The elastic modulus of the first elastic member 40 used to mitigate the vibration and impact in the first direction F1 may be smaller than the elastic modulus of the second elastic member 50, that is, the lower the elastic modulus of the first elastic member 40, the softer the material, the easier it is to deform, and the stronger the impact resistance. The higher the elastic modulus of the second elastic member 50, the more rigid the material, the more difficult it is to deform, and the weaker the impact resistance.

[0134] According to some embodiments of the present application, optionally, the elastic modulus of the material of the second elastic member 50 is F, 0.1 Gpa<F<1 Gpa.

[0135] Elastic modulus is a physical quantity that measures the material's ability to resist elastic deformation. It reflects the stiffness of a material when it is deformed by force, that is, the material's ability to produce unit strain under unit stress. The higher the elastic modulus, the more rigid the material is and the harder it is to deform; the lower the elastic modulus, the softer the material is and the easier it is to deform. The unit of elastic modulus is usually Pascal (Pa), and in practical applications it is often expressed in megapascals (MPa) or gigapascals (GPa).

[0136] It is understood that the elastic modulus of the second elastic member 50 is greater than the elastic modulus of the first elastic member 40. In one example, the elastic modulus of the first elastic member 40 is 0.5 GPa, and the elastic modulus of the second elastic member 50 can be other values ​​greater than 0.5 GPa and less than 1 GPa.

[0137] In some examples, the elastic modulus F of the material of the second elastic member 50 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.

[0138] By setting the material elastic modulus F of the second elastic member 50 to satisfy 0.1Gpa<K<1Gpa, the second elastic member 50 can be given appropriate flexibility, which can effectively buffer external vibrations without losing its supporting function due to being too soft. Therefore, when the battery device 100 is vibrated or impacted, sufficient buffering force can be provided for the pouch-shaped battery cell 20, displacement and movement can be reduced, and the battery device 100 can be protected.

[0139] According to some embodiments of the present 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 is electrically connected to the shell 30, and the second elastic member 50 includes an insulating layer or an insulating shell.

[0140] The insulating layer means that the second elastic member 50 may be a multi-layer structure and include at least one insulating material layer; the insulating shell means that the second elastic member 50 may be a structure in which the outer shell encloses the internal functional material, wherein the outer shell is made of insulating material, and the functional material may be a flame retardant material, a phase change material, an elastic material, or other material that realizes other functions. The insulating layer or insulating shell is used to allow the second elastic member 50 to insulate and separate the pouch-shaped battery cell 20 and the housing 30.

[0141] According to some embodiments of the present application, optionally, the pouch-shaped battery cell 20 adjacent to the second elastic member 50 includes a pouch-shaped outer shell and an electrode assembly, the electrode assembly is located in the pouch-shaped outer shell, and is projected toward the first shell wall 33 along the third direction F3, and the projection of the second elastic member 50 completely covers the projection of the electrode assembly.

[0142] Full projection coverage means that when projected toward the first shell wall 33 along the third direction F3, the projection of the second elastic member 50 may coincide with the projection of the electrode assembly, or the projection of the second elastic member 50 may completely cover the projection beyond the electrode assembly.

[0143] By making the projection of the second elastic member 50 completely cover the projection of the electrode assembly, it is possible to avoid stress concentration caused by uneven force at this position due to the projection edge of the second elastic member 50 being inside the outer contour of the electrode assembly, thereby improving the reliability of the battery device.

[0144] According to some embodiments of the present application, optionally, the thickness of the second elastic member 50 is smaller than the thickness of the first elastic member 40 .

[0145] In practical applications, when the electric device is a vehicle 1000 , the battery device 100 includes a box 10 , at least one housing 30 and at least one pouch-shaped battery cell 20 . One housing 30 can accommodate at least one pouch-shaped battery cell 20 .

[0146] The box body 10 is provided with an inner bottom wall 13, and a plurality of housings 30 can be arranged along the front-to-back direction and / or the left-to-right direction of the electric vehicle and connected to the inner bottom wall 13, and the opening 32 of the housing 30 faces the bottom of the electric vehicle and 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.

[0147] The multiple housings 30 are closely arranged in the front-to-back direction and / or the left-to-right direction of the electric vehicle and are closely attached to each other to form a mutual support effect. When external vibration acts in the front-to-back direction and / or the left-to-right direction of the electric vehicle, the close arrangement of the housings 30 will offset part of the vibration.

[0148] 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 reduce vibration and impact in the first direction F1, and the second elastic member 50 can reduce vibration and impact in the third direction F3.

[0149] In this embodiment, the third direction F3 may be the front-to-back direction and / or the left-to-right direction of the electric vehicle. Since the close arrangement between the shells 30 may offset part of the vibration in the third direction F3, the pouch-shaped battery cell 20 is more likely to be displaced due to the vibration and impact in the first direction F1. The thickness of the first elastic member 40 for mitigating the vibration and impact in the first direction F1 may be greater than the thickness of the second elastic member 50. That is, the thickness of the first elastic member 40 is greater, and the ability to support and absorb vibration is stronger. The thickness of the second elastic member 50 is smaller, and the ability to support and absorb vibration is weaker.

[0150] By setting the thickness of the second elastic member 50 to be smaller than that of the first elastic member 40, that is, the second elastic member 50 has a weaker ability to support and absorb vibration than the first elastic member 40. Since in the application scenario of the battery device 100, the impact in the first direction F1 occurs more frequently or is stronger, the first elastic member 40 has a stronger ability to support and absorb vibration, and can be configured according to the application scenario of the battery device 100, so as to optimize the vibration buffering effect, reasonably allocate materials, reduce the overall weight of the battery device 100, and improve the structural stability and service life of the battery device 100.

[0151] According to some embodiments of the present application, optionally, the thickness of the second elastic member 50 is S, 0.2 mm ≤ S ≤ 10 mm.

[0152] The thickness of the second elastic member 50 may 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 .

[0153] In some examples, the thickness S of the second elastic member 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.

[0154] It is understood that the thickness of the second elastic member 50 is less than the thickness of the first elastic member 40. In one example, the thickness of the first elastic member 40 is 8 mm, and the thickness of the second elastic member 50 can be other values ​​greater than or equal to 0.2 mm and less than 8 mm.

[0155] By setting the thickness S of the second elastic member 50 to satisfy 0.2 mm≤S≤10 mm, the second elastic member 50 can be neither too thin to effectively provide buffering nor too thick to occupy too much internal space of the housing 30 .

[0156] According to some embodiments of the present application, optionally, please combine Figure 3 and Figure 4 The inner bottom wall 13 is provided with a water cooling channel 131 , and the opening 32 faces the water cooling channel 131 .

[0157] The water cooling channel 131 can provide a channel for the flow of cooling fluid, and the cooling fluid includes but is not limited to cooling water or coolant. The heat of the pouch-shaped battery cell 20 can be transferred to the inner bottom wall 13 through the colloid 60 and the shell 30. When the cooling fluid flows, it can take away the heat transferred by the colloid 60 and the shell 30, thereby achieving the purpose of heat dissipation of the pouch-shaped battery cell 20. In the battery device 100, the water cooling channel 131 can be arranged in an area close to the pouch-shaped battery cell 20, and is used to perform effective thermal management through the cooling fluid when the pouch-shaped battery cell 20 generates heat during operation, helping to keep the temperature of the battery device 100 within a safe range and avoid overheating.

[0158] 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-shaped battery cell 20 can be quickly taken away, maintaining the pouch-shaped battery cell 20 within a suitable temperature range, thereby helping to avoid battery performance degradation, overheating and even thermal runaway caused by excessive temperature.

[0159] According to some embodiments of the present application, optionally, the colloid 60 is thermally conductive.

[0160] In the battery device 100, the pouch-shaped battery cell 20 is connected to the inner bottom wall 13 of the box body 10 through the colloid 60. The heat generated by the pouch-shaped battery cell 20 can be transferred to the inner bottom wall 13 through the colloid 60, so that the heat can be taken away by the water cooling channel 131 on the inner bottom wall 13, maintaining the pouch-shaped battery cell 20 within a suitable temperature range, which helps to avoid battery performance degradation, overheating and even thermal runaway caused by excessive temperature.

[0161] By setting the colloid 60 to have thermal conductivity, the heat generated by the bag-shaped battery cell 20 can be conducted to the inner bottom wall 13, and then the heat can quickly enter the water cooling channel 131, thereby improving the heat dissipation efficiency to a certain extent, maintaining the temperature of the bag-shaped battery cell 20 stable, and effectively avoiding overheating problems.

[0162] The colloid 60 includes but is not limited to thermal conductive glue, structural glue, AB glue or black glue.

[0163] According to some embodiments of the present 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.

[0164] That is, in some embodiments, the pouch-shaped battery cell 20 is configured as a lithium iron phosphate battery, in some embodiments, the pouch-shaped battery cell 20 is configured as a ternary lithium battery cell, and in some embodiments, the pouch-shaped battery cell 20 is configured as a solid-state battery cell.

[0165] The solid-state battery cell may be, but is not limited to, a polymer solid-state battery cell, an oxide solid-state battery cell, a sulfide solid-state battery cell, a halide solid-state battery cell, etc. The solid-state battery cell may also be a semi-solid-state battery cell or a fully solid-state battery cell.

[0166] In the above technical scheme, in the embodiment of the present application constructed as a lithium iron phosphate battery cell, the reliability of the pouch-shaped battery cell can be improved and the cycle life of the pouch-shaped battery cell can be extended. In the embodiment of the present application constructed as a ternary lithium battery cell, the energy density of the pouch-shaped battery cell can be improved and the cruising range can be improved. In the embodiment of the present application constructed as a solid-state pouch-shaped battery cell, not only the energy density can be improved, but also the reliability can be improved.

[0167] According to some embodiments of the present application, when the pouch-shaped battery cell 20 is lithium iron phosphate (LiFeO 4 ) battery cell, in the positive electrode material of the pouch-shaped battery cell 20, the usage ratio of the positive electrode active material, the positive electrode binder and the positive electrode conductive agent is 96: (1-3): (1-3); when the pouch-shaped battery cell 20 is a ternary lithium battery cell, and in the positive electrode material of the pouch-shaped battery cell 20, the usage ratio of the positive electrode active material, the positive electrode binder and the positive electrode conductive agent is 96: (2-3): (1-2).

[0168] It can be understood that when the pouch-shaped battery cell 20 is a lithium iron phosphate 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 1 to 3 parts of the total weight of the positive electrode material (for example, it can include but is 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, it can include but is not limited to 1, 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, etc.).

[0169] For example, when the pouch-shaped battery cell 20 is a lithium iron phosphate battery cell, the positive electrode active material is LFP (which may refer to LiFePO 4 , that is, lithium iron phosphate), the binder can be PVDF (polyvinylidene fluoride), the conductive agent can be conductive carbon black, wherein LFP:PVDF:conductive carbon black can be 96:2:2, that is, the total weight of the positive electrode active material is 100 parts, LFP accounts for 96 parts, PVDF accounts for 2 parts, and conductive carbon black also accounts for 2 parts. The weight unit of the positive electrode active material can be grams.

[0170] When the pouch-shaped battery cell 20 is a ternary 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 2-3 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 1-2 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.). Among them, the ternary battery cell can be but not limited to nickel cobalt manganese lithium oxide system, nickel cobalt aluminum oxide lithium oxide system, etc.

[0171] For example, the ternary material of the ternary battery cell can be eight series LiNi 0.8 Co 0.1 Mn 0.1 O 2 The weight ratio of the positive electrode active material, binder and conductive agent is 96:2.5:1.5. That is to say, the total weight of the positive electrode material is divided into 100 parts. 0.8 Co 0.1 Mn 0.1 O 2 The proportion is 96 parts, the proportion of adhesive is 2.5 parts, and the proportion of conductive agent is 1.5 parts.

[0172] In the above technical solution, 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 in a limited electrode assembly, which is beneficial to increasing the capacity and energy density of the battery device 100, so that the lithium iron phosphate battery cell can output a higher amount of electricity in a relatively small volume and weight, meeting the application scenario with certain requirements for energy density. The amount of the binder and the conductive agent used in the above range 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, since the structure and surface properties of the ternary material itself are relatively complex, the use of the positive electrode active material, binder, and conductive agent in the above-mentioned amount ratio is beneficial to ensure good bonding between the 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, and reducing the risk of active material shedding and electrode pulverization during charging and discharging, and extending the cycle life of the battery device 100.

[0173] According to some embodiments of the present application, the present application further provides an energy storage device 1, which includes the battery device 100 described in any of the above schemes, and the battery device 100 is used to store or provide electrical energy.

[0174] The energy storage device 1 includes one or more battery clusters to increase the voltage and capacity of the energy storage device 1. The battery cluster may include multiple battery devices 100, and the multiple battery devices 100 are connected in series through a busbar to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device 1. The definition of the battery device 100 is as mentioned above and will not be repeated here.

[0175] 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. The energy storage device 1 can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device 1 can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption. The energy storage system 2000 provided in the embodiment of the present application can be any power system that requires the use of the energy storage device 1.

[0176] In one embodiment, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0177] In one embodiment, the energy storage device 1 may include a cabinet and one or more battery clusters, wherein the battery clusters are accommodated in the cabinet.

[0178] In one embodiment, the energy storage device 1 may include modules such as a thermal management module, a main control module, a master control module, a power distribution module and a fire protection module.

[0179] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device 100 through a pipeline.

[0180] As an example, the main control module can be used as a battery management unit of a battery cluster 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 example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (SBMU), a fusion switch and other modules.

[0181] As an example, the master control module can be used as a battery management unit of the energy storage device 1 to monitor and manage the energy storage device 1. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device 1. For example, the charging and discharging current, voltage, etc. of the energy storage device 1 can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module and other modules.

[0182] As an example, the fire protection system includes a control panel, a detector, an alarm device, etc., which are used to detect, alarm or extinguish fire in the energy storage system 2000.

[0183] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1 .

[0184] According to some embodiments of the present application, the present application further provides an energy storage system 2000, which includes a power conversion device and the energy storage device 1 described in any of the above schemes, and the battery device 100 is used to store or provide electrical energy.

[0185] The energy storage system 2000 may include one or more energy storage devices 1 and a power converter 2 (Power Converter System, PCS for short), wherein the power converter 2 is used to be connected between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electric energy, and the electric energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 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.

[0186] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery device 100, the energy storage device 1 or the energy storage system 2000 described in any of the above schemes, and the battery device 100 is used to store or provide electrical energy.

[0187] According to some embodiments of the present application, the present 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, and the energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0188] The charging network 3000 may include a charging pile 4 and an energy storage device 1, wherein the charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electrical energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device 100 in the energy storage device 1 through a cable, and 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, and the connector 5 is used to connect to an electrical device (such as a vehicle 1000), so that the electrical device can be replenished. The definition of the battery device 100 is referred to above and will not be repeated here.

[0189] The energy storage device 1 may be located inside the charging pile 4 (eg, an integrated storage and charging device), or may be located outside the charging pile 4 .

[0190] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body having an inner bottom wall; An energy unit, comprising a pouch-shaped battery cell and a shell, wherein a receiving cavity is provided in the shell, and a first opening is provided on a side of the shell facing a first direction, the first opening faces the inner bottom wall, the pouch-shaped battery cell is received in the receiving cavity, and the pouch-shaped battery cell is bonded to the inner bottom wall at the first opening by a colloid, and the other side of the shell facing the first direction is a first shell wall; The first elastic member is disposed in the housing and at least partially located between the first housing wall and the pouch-shaped battery cell.

2. The battery device according to claim 1, characterized in that: Two sides of the first elastic member along the first direction respectively abut against the pouch-shaped battery cell and the first housing wall.

3. The battery device according to claim 2, characterized in that: The first elastic member connects the pouch-shaped battery cell and the first housing wall via adhesive.

4. The battery device according to claim 1, characterized in that: The elastic modulus of the material of the first elastic member is K, 0.1 Gpa<K<1 Gpa.

5. The battery device according to claim 1, characterized in that: The thickness dimension of the first elastic member along the first direction is D, and 0.2 mm≤D≤10 mm.

6. The battery device according to claim 1, characterized in that: The pouch-shaped battery cell includes a first electrode lead-out portion and a second electrode lead-out portion with opposite polarities, one of the first electrode lead-out portion and the second electrode lead-out portion is electrically connected to the housing, and the first elastic member includes an insulating layer or an insulating shell.

7. The battery device according to any one of claims 1 to 6, characterized in that: The first shell wall is provided with a pressure relief structure, and the first elastic member is spaced apart from the pressure relief structure.

8. The battery device according to claim 1, characterized in that: A limiting structure is provided at an end of the shell close to the first opening, and the pouch-shaped battery cell is located between the first elastic member and the limiting structure.

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

10. The battery device according to claim 9, characterized in that: The second elastic member is connected to the pouch-shaped battery cell and the second shell wall through adhesive.

11. The battery device according to claim 9, characterized in that: The elastic modulus of the second elastic member is greater than the elastic modulus of the first elastic member.

12. The battery device according to claim 9, characterized in that: The elastic modulus of the material of the second elastic member is F, 0.1 Gpa<F<1 Gpa.

13. The battery device according to claim 9, characterized in that: The pouch-shaped battery cell includes a first electrode lead-out portion and a second electrode lead-out portion with opposite polarities, one of the first electrode lead-out portion and the second electrode lead-out portion is electrically connected to the housing, and the second elastic member includes an insulating layer or an insulating shell.

14. The battery device according to claim 9, characterized in that: The pouch-shaped battery cell adjacent to the second elastic member includes a pouch-shaped shell and an electrode assembly. The electrode assembly is located in the pouch-shaped shell. When projected toward 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 claim 9, characterized in that: The thickness of the second elastic member is smaller than the thickness of the first elastic member.

16. The battery device according to claim 9, characterized in that: The thickness of the second elastic member is S, 0.2 mm ≤ S ≤ 10 mm.

17. The battery device according to claim 1, 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 to 6 and 8 to 17, characterized in that: The colloid is thermally conductive.

19. The battery device according to any one of claims 1 to 6 and 8 to 17, characterized in that: 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.

20. An energy storage device, characterized in that: Comprising a plurality of battery devices as claimed in claim 19, the battery devices are used to store or provide electrical energy.

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

22. An electrical device, characterized in that: It comprises the battery device as described in any one of claims 1 to 19, or the energy storage device as described in claim 20, or the energy storage system as described in claim 21, wherein the battery device is used to store or provide electrical energy.

23. A charging network, characterized in that: It comprises a charging pile and the energy storage device according to claim 20 or the energy storage system according to claim 21, wherein the energy storage device is used to provide electrical energy for the charging pile.

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