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

Abstract

The utility model provides a battery device, an energy storage device, an energy storage system and a charging network. The battery device includes: a battery assembly; the lower box body at least comprises a silicate mixing layer; the lower box body comprises a supporting wall, and the supporting wall is configured to support the battery assembly; the heat exchange plate is arranged on the lower box body; the battery assembly is in contact with the heat exchange plate and / or the lower box body; the supporting wall is provided with an accommodating groove; and at least part of the heat exchange plate is embedded into the accommodating groove. According to the lower box body of the battery device, the manufacturing cost is relatively low, the lower box body has relatively high structural strength, the high temperature resistance and corrosion resistance of the lower box body are improved, the lower box body has certain heat preservation and heat insulation capability, the energy loss of the heat exchange plate is effectively reduced, the heat management energy consumption is reduced, and meanwhile, the generation of condensate on the lower box body can be reduced.

Description

Technical Field

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

[0002] In recent years, battery devices have been widely used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, as well as in power tools, electric bicycles, electric motorcycles, electric vehicles, aerospace and other fields.

[0003] The battery device includes a battery case and battery components. The battery case comprises a lower case and an upper case, which cooperate to form a receiving cavity. The battery components are located within the receiving cavity. However, the lower case currently suffers from low strength, poor thermal insulation and high-temperature resistance, high material costs, and susceptibility to aging. Utility Model Content

[0004] The battery device, energy storage device, energy storage system and charging network provided in this application are intended to solve the problems of low strength, poor thermal insulation and high temperature resistance, high material cost and easy aging of the existing lower box.

[0005] To solve the above technical problems, the present application adopts a technical solution: providing a battery device, the battery device comprising:

[0006] Battery components;

[0007] The lower box body includes at least a silicate mixed layer; the lower box body includes a support wall, and the support wall is configured to support the battery assembly;

[0008] The heat exchange plate is arranged in the lower box; the battery assembly is in contact with the heat exchange plate and / or the lower box; the support wall has a receiving groove; at least a portion of the heat exchange plate is embedded in the receiving groove.

[0009] The above solution, by including at least a silicate mixed layer in the lower housing, significantly reduces the manufacturing cost of the lower housing due to its low cost, high strength, strong high-temperature resistance, and certain thermal insulation and corrosion resistance, resulting in a long service life. This also provides the lower housing with high structural strength, improved high-temperature and corrosion resistance, and certain thermal insulation capabilities, effectively reducing energy loss in the heat exchange plates, lowering thermal management energy consumption, and reducing the generation of condensate in the lower housing. Furthermore, the accommodating grooves can be used to limit the position of the heat exchange plates and increase the contact area between the heat exchange plates and the supporting wall, thereby improving heat exchange efficiency.

[0010] In one embodiment, the heat exchange plate comprises a plurality of heat exchange pipes; the plurality of heat exchange pipes are embedded in the accommodating groove, and the side surface of the plurality of heat exchange pipes facing the battery assembly is flush with the side surface of the supporting wall facing the battery assembly.

[0011] The above scheme can make the battery assembly contact with the plurality of heat exchange pipes to exchange heat with the battery assembly through the heat exchange pipes, and can also make the battery assembly contact with the lower box body to provide better strength support for the battery assembly.

[0012] In one embodiment, the lower box body further comprises a side wall connected with the supporting wall and protruding from the supporting wall, and the side wall and the supporting wall cooperatively form an accommodating cavity; at least part of the battery assembly along the height direction and the heat exchange plate are arranged in the accommodating cavity.

[0013] The above scheme has better structural strength and stability. Moreover, the pot-shaped lower box body can better withstand external pressure and impact to protect the battery assembly loaded therein and reduce the risk of damage to the battery assembly.

[0014] In one embodiment, the side surface of the supporting wall of the lower box body away from the battery assembly is provided with a first cross beam and / or a second cross beam; the first cross beam extends along a first direction; and the second cross beam extends along a second direction intersecting the first direction.

[0015] The above scheme can improve the structural strength of the lower box body and reduce the thickness of the lower box body except the position of the cross beam, thereby reducing the weight of the lower box body.

[0016] In one embodiment, the first cross beam is provided with a first reinforcing rib, and the extension direction of the first reinforcing rib is the same as the extension direction of the first cross beam; and / or the second cross beam is provided with a second reinforcing rib, and the extension direction of the second reinforcing rib is the same as the extension direction of the second cross beam. In this way, the structural strength of the lower box body can be further improved.

[0017] In one embodiment, the inside of the lower box body is provided with a reinforcing frame; and / or the inside of the lower box body is dispersed with a fiber structure; the fiber structure comprises a steel fiber structure or a glass fiber structure. In this way, the supporting strength of the lower box body can be greatly improved, and the risk of cracking of the lower box body can be effectively reduced.

[0018] In one embodiment, the length of the supporting wall of the lower box body along the first direction is less than the length of the supporting wall along the second direction; and the two sides of the supporting wall along the first direction are provided with lifting holes.

[0019] The above scheme can realize the lifting and carrying of the battery device through the lifting hole, and the lifting hole is arranged on both sides of the support wall along the first direction. Compared with the scheme in which the lifting hole is arranged on both sides of the support wall along the second direction, the distance between the two lifting holes is shorter, so that the possibility of shaking of the battery device in the air can be reduced, thereby improving the stability during lifting. Moreover, the shorter distance can make the force of the lifting device more evenly distributed on the battery device, reduce the stress concentration of a specific part, and reduce the risk of material fatigue and damage. In addition, when the distance between the two lifting holes is shorter, it is easier to align and fix, especially in a narrow space or in the case of high-precision positioning, which simplifies the entire lifting process.

[0020] In one embodiment, a lifting insert is further included, the lifting insert is embedded in the lifting hole, the strength of the lifting insert is greater than the strength of the silicate mixed layer, and the lifting insert is provided with a lifting insertion hole.

[0021] The above scheme, since the strength of the lifting insert is greater than the strength of the silicate mixed layer, in this embodiment, by arranging the lifting insert in the lifting hole and lifting the battery device through the lifting insert, the risk of damaging the lower box and / or falling slag during lifting can be reduced, and the risk of falling or tilting of the battery device during lifting can be reduced.

[0022] In one embodiment, the side surface of the support wall of the lower box facing the battery assembly is further provided with a first mounting hole at both ends along the second direction, and a first connecting insert is arranged in the first mounting hole; the battery assembly is connected to the first connecting insert through a first connecting column to connect with the lower box.

[0023] The above scheme can stably fix the battery assembly in the lower box. Compared with the scheme in which the first connecting column is directly connected to the connecting hole of the support wall, since the strength of the support wall of the silicate mixed layer is low and slag is easy to fall during the connection process, the first connecting insert has high strength, which can effectively reduce the risk of damage to the lower box and / or falling slag during the connection process of the first connecting column. At the same time, the combination stability between the first connecting column and the support wall can be improved.

[0024] In one embodiment, the end surface of the side wall away from the support wall has a second mounting hole, and a second connecting insert is arranged in the second mounting hole; the battery device further includes an upper box arranged on the lower box, and the upper box is connected to the second connecting insert through a second connecting column to connect with the lower box.

[0025] The above solution can form a complete, sealed internal environment for the battery device, protecting the battery components. Furthermore, by embedding the second connecting insert in the end face of the side wall and securing the upper case with the second connecting post, compared to a solution where the second connecting post is directly connected to the connection hole in the end face of the side wall, the side wall of the silicate mixture layer has lower strength and is prone to chipping during the connection process. The second connecting insert, on the other hand, has greater strength, effectively reducing the risk of damage to the lower case and / or chipping during the connection process of the second connecting post. It also improves the stability and sealing of the connection between the second connecting post and the side wall.

[0026] In one embodiment, the side wall has a water inlet hole and a water outlet hole; the heat exchange plate also includes a current collector, which is connected to the side wall and has a water inlet structure and a water outlet structure; the water inlet structure includes a water inlet nozzle, which extends out of the accommodating cavity through the water inlet hole; the water outlet structure includes a water outlet nozzle, which extends out of the accommodating cavity through the water outlet hole; wherein, along a direction perpendicular to the height direction of the battery device, multiple heat exchange tubes are arranged on one side of the current collector, and the two ends of each heat exchange tube are respectively connected to the water inlet nozzle and the water outlet nozzle.

[0027] In the above solution, the water inlet and outlet nozzles extend out of the lower box to connect to the liquid inlet pipe and the liquid outlet pipe respectively, so that the heat exchange fluid can enter the heat exchange plate and circulate to exchange heat for the battery assembly.

[0028] In one embodiment, the water inlet structure also includes a first flange and a first sealing ring, the first flange is arranged on the side surface of the collector away from the multiple heat exchange tubes, and the circumferential edge of the first flange is arranged around the water inlet hole and fits with the side wall; the water inlet nozzle is connected to the first flange; the first sealing ring is arranged on the first flange and is configured to seal the gap between the side wall and the first flange; the water outlet structure includes a second flange and a second sealing ring, the second flange is arranged on the side surface of the collector away from the multiple heat exchange tubes, and the circumferential edge of the second flange is arranged around the water outlet hole and fits with the side wall; the water outlet nozzle is connected to the second flange; the second sealing ring is arranged on the second flange and is configured to seal the gap between the side wall and the second flange.

[0029] The above scheme can achieve sealing between the collector and the side walls around the water inlet through the first flange and the first sealing ring, and achieve sealing between the collector and the side walls around the water outlet through the second flange and the second sealing ring, thereby ensuring the overall sealing of the lower box while leading out the water inlet and outlet.

[0030] In one embodiment, the silicate mixed layer is a cement layer or a concrete layer.

[0031] In the above solution, the cement and concrete layers are relatively inexpensive and readily available, resulting in low maintenance costs. Furthermore, the concrete layer has a long lifespan, offers excellent durability, and is highly reliable, making it suitable for long-term storage. Furthermore, the concrete or cement layer offers improved resistance to UV rays, corrosion, and other factors.

[0032] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide an energy storage device, which includes the battery device involved above.

[0033] To solve the above technical problems, another technical solution adopted in this application is: to provide an energy storage system, which includes a power conversion device and the above-mentioned energy storage device, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0034] In order to solve the above technical problems, another technical solution adopted in this application is: providing a charging network, which includes charging piles and the above-mentioned energy storage device, and the energy storage device is used to provide electrical energy for the charging piles.

[0035] 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

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 A schematic diagram of the structure of a charging network provided in one embodiment of the present application;

[0038] Figure 2 Schematic diagram of the structure of the energy storage device in one embodiment of the present application;

[0039] Figure 3 Schematic diagram of the structure of the energy storage system in one embodiment of the present application;

[0040] Figure 4 A schematic diagram of the overall structure of a battery device provided in one embodiment of the present application;

[0041] Figure 5 for Figure 4 The schematic diagram of the structure of the battery device after removing the upper box;

[0042] Figure 6 A schematic structural diagram of a heat exchange plate provided in an embodiment of the present application, provided on a lower box body, from a first perspective;

[0043] Figure 7 A schematic structural diagram of a heat exchange plate provided in an embodiment of the present application, provided on a lower box body, from a second perspective;

[0044] Figure 8 for Figure 6 a disassembled schematic diagram of the structure shown;

[0045] Figure 9 A schematic structural diagram of a lower box provided in one embodiment of the present application;

[0046] Figure 10 for Figure 9 An enlarged view of position M of the structure shown;

[0047] Figure 11 A schematic diagram of the back of the lower box provided in one embodiment of the present application;

[0048] Figure 12 A schematic structural diagram of a reinforcement frame provided in one embodiment of the present application;

[0049] Figure 13 A perspective view of a lower box provided in one embodiment of the present application;

[0050] Figure 14 A schematic structural diagram of a heat exchange plate provided in one embodiment of the present application;

[0051] Figure 15 for Figure 14 Enlarged view of point A in the middle;

[0052] Figure 16 A schematic structural diagram of a heat exchange plate provided in an embodiment of the present application, provided on a lower box body, from a third perspective;

[0053] Figure 17 for Figure 16 Magnified view of point B of the structure shown.

[0054] Description of Reference Numerals

[0055] 1000 charging networks; 2000 energy storage systems; 3000 power generation devices; 100 battery devices; 200 energy storage device; 210 energy storage box; 300 charging pile; 400 energy storage converter; 10 battery assembly; 11 battery cell; 20 lower box; 21 supporting wall; 211 accommodating groove; 212 first crossbeam; 213 first connecting insert; 214 first connecting column; 22 reinforcing frame; 221 third reinforcing rib; 222 fourth reinforcing rib; 23 side wall; 231 second connecting insert; 232 second connecting column; 233 water inlet; 2331 first hole portion; 2332 second hole portion; 2333 first connecting hole; 234 water outlet; 30 heat exchange plate; 31 heat exchange tube; 32 current collector; 33 water inlet structure; 331 water inlet nozzle; 332 first flange; 333 first sealing ring; 334 first connecting bolt; 335 first threaded hole; 34 water outlet structure; 341 water outlet nozzle; 40 lifting insert; 50 upper box. DETAILED DESCRIPTION

[0056] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0058] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0059] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] 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, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0061] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] The lower box body is usually a composite material lower box body, a plastic lower box body or a metal lower box body. Among them, the composite material lower box body has the following problems: 1. The cost of the composite material lower box body is high, especially the use of double-layer composite material, and in order to ensure the strength of the box body, the thickness of the composite material needs to be large, and more composite material is used, which greatly increases the cost of the lower box body. 2. The high temperature resistance of the composite material lower box body is poor, especially the fire resistance is poor. After the battery monomer in the battery device is out of control or on fire, the composite material lower box body is easy to be damaged in the high temperature environment, causing the heat loss or fire to spread to other battery devices. 3. The strength of the composite material lower box body is poorer than that of the metal lower box body, and it cannot be applied to battery devices with heavy weight, large vibration and impact load.

[0065] The technical problems of the plastic lower box are basically the same as those of the composite material lower box. The plastic lower box has low strength, poor high temperature resistance, is not fire-resistant, has high material cost and is easy to age.

[0066] The metal lower box has the following technical problems: (1) poor thermal insulation capability; (2) the lower box is prone to metal corrosion; and (3) high metal material and anti-corrosion treatment costs.

[0067] Based on this, an embodiment of the present application provides a battery device, the lower box of which includes at least a silicate mixed layer, which greatly reduces the manufacturing cost of the lower box, and makes the lower box have higher structural strength, improves the high temperature resistance and corrosion resistance of the lower box, and makes the lower box have certain thermal insulation capabilities.

[0068] The battery device disclosed in the embodiments of the present application can be applied to energy storage devices such as energy storage containers or energy storage cabinets.

[0069] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0070] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a charging network 1000 provided in one embodiment of the present application; Figure 2 This is a schematic diagram of the structure of an energy storage device 200 provided in one embodiment of the present application. In one embodiment, a charging network 1000 is provided, comprising charging piles 300 and an energy storage device 200. The charging piles 300 are used to charge electrical devices. The energy storage device 200 is electrically connected to the charging piles 300 and is used to provide electrical energy to the charging piles 300.

[0071] It should be noted that the charging pile 300 is electrically connected to the battery cells in the energy storage device 200 via a cable, and the battery cells can provide their stored energy to the charging pile 300. The charging pile 300 has a connector that can be connected to an electrical device to replenish energy. The application of the energy storage device 200 in the charging network 1000 can effectively improve the safety of the charging network 1000 and also help increase the flexibility of the charging network 1000 during deployment.

[0072] Electrically powered equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be fuel-powered, gas-powered, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Spacecraft include aircraft, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0073] In a charging network 1000 , there may be one charging pile 300 , and the energy storage device 200 provides power to the one charging pile 300 ; there may also be multiple charging piles 300 , and the energy storage device 200 provides power to multiple charging piles 300 .

[0074] As an example, Figure 1 As shown, the charging network 1000 includes an energy storage device 200 and two charging piles 300 , and one energy storage device 200 provides power to the two charging piles 300 .

[0075] The energy storage device 200 may include a battery device 100 , which is electrically connected to the charging pile 300 so that the battery device 100 provides electrical energy to the charging pile 300 .

[0076] Please refer to Figure 2 and Figure 3 , Figure 3 Schematic diagram of the structure of an energy storage system 2000 provided in one embodiment of the present application. The embodiment of the present application provides an energy storage system 2000. The energy storage system 2000 includes an energy storage converter 400, a power conversion device, and an energy storage device 200.

[0077] The energy storage and conversion device 400 can be electrically connected to the power generation device 3000 to convert the power provided by the power generation device 3000. The energy storage system 2000 can also include an energy storage device 200, which is electrically connected to the energy storage and conversion device 400. The energy storage and conversion device 400 converts the power provided by the power generation device 3000 into the energy storage device 200 for storage.

[0078] The power conversion device is connected between the power generation device 3000 and the energy storage device 200. The power generation device 3000 is used to generate electrical energy, and the power generation device 3000 is used to store the generated electrical energy in the energy storage device 200 via the power conversion device. The use of the energy storage device 200 in the energy storage system 2000 can effectively improve the operational safety of the energy storage system 2000. In a specific implementation, the power generation equipment can specifically include solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. The specific type of power generation equipment is not limited in this application.

[0079] As an example, Figure 3 As shown, the energy storage system 2000 includes an energy storage device 200 and an energy storage conversion device 400. The two power generation devices 3000 respectively transmit the generated electric energy to the energy storage conversion device 400, and the electric energy is introduced into the energy storage device 200 for storage through the energy storage conversion device 400.

[0080] Please refer to Figure 2 The energy storage device 200 further includes an energy storage box 210 , in which the battery device 100 is disposed.

[0081] As an example, the energy storage device 200 may be an energy storage container, an energy storage cabinet, etc.

[0082] As an example, the energy storage device 200 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 power station can store electric energy during low power consumption periods and provide electric energy to relevant users or electrical equipment during peak power consumption periods. The wind energy collected by the wind turbines of the wind power generation system is converted into electric energy and then stored by the energy storage device 200. The solar power generation system can convert solar energy into electric energy, which is then stored by the energy storage device 200 and supplied to users in a timely manner. The mobile power system can supply power to relevant electrical equipment in places where the power grid power supply system cannot reach, such as remote mountainous areas, remote wilderness areas, etc. The temporary power supply system can provide power to users when the power supply is insufficient.

[0083] See also Figures 4 to 10 , Figure 4 A schematic diagram of the overall structure of a battery device 100 provided in one embodiment of the present application; Figure 5 for Figure 4 The structure diagram of the battery device 100 after removing the upper box 50 is shown; Figure 6 This is a structural schematic diagram of a heat exchange plate 30 provided in an embodiment of the present application, which is arranged on the lower box 20 from a first perspective; Figure 7 A schematic structural diagram of a heat exchange plate 30 provided in an embodiment of the present application, provided on the lower box 20, from a second perspective; Figure 8 for Figure 6 a disassembled schematic diagram of the structure shown; Figure 9 A schematic structural diagram of the lower box 20 provided in one embodiment of the present application; Figure 10 for Figure 9 Enlarged view of position M of the structure shown.

[0084] In one embodiment, a battery device 100 is provided, comprising a battery assembly 10, a lower housing 20, and a heat exchange plate 30. The lower housing 20 includes at least a silicate mixed layer and a support wall 21 configured to support the battery assembly 10. The heat exchange plate 30 is disposed within the lower housing 20, with the battery assembly 10 in contact with the heat exchange plate 30 and / or the lower housing 20. The support wall 21 has a receiving groove 211, with at least a portion of the heat exchange plate 30 embedded within the receiving groove 211.

[0085] The battery assembly 10 includes multiple battery cells 11. Multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection to form a single battery assembly 10. In other embodiments, multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection, and then arranged and fixed to form a single battery assembly 10. In still other embodiments, multiple battery cells 11 can be connected in series, in parallel, or in a mixed connection, and then arranged and fixed to form multiple assemblies, which are then connected in series, in parallel, or in a mixed connection to form a single assembly.

[0086] As an example, the plurality of battery cells 11 may be fixed by a cable tie or the like to form the battery assembly 10. As an example, the plurality of battery cells 11 may also be fixed by an end plate, a side plate or the like to form the battery assembly 10.

[0087] The battery cell 11 referred to in the embodiments of this application refers to the smallest unit that stores and outputs electrical energy. The battery cell 11 can be a secondary battery or a primary battery. The battery cell 11 can be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 11 can be cylindrical, flat, rectangular, or other shapes.

[0088] The battery cell 11 may include an outer casing, an electrode assembly, and other functional components. The outer casing includes end caps and a bottom casing. The end caps are components that fit over the openings in the bottom casing to isolate the internal environment of the battery cell 11 from the external environment. The shape of the end caps can be adapted to match the shape of the bottom casing. Optionally, the end caps can be made of a material with a certain degree of hardness and strength (such as aluminum alloy). This makes them less susceptible to deformation during compression and collision, providing the battery cell 11 with greater structural strength and improved safety.

[0089] The end cap may be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the electrode assembly for outputting or inputting electrical energy from the battery cell 11. In some embodiments, the electrode terminals may include poles. The poles may include positive and negative poles, used for outputting current and connecting to external circuits. In some embodiments, the end cap may also be provided with explosion-proof components for venting internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold. The end cap may be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be provided on the inside of the end cap to isolate the electrical connection components within the bottom shell from the end cap to reduce the risk of short circuits. Exemplary insulating members may be made of plastic, rubber, etc. The bottom shell is a component that cooperates with the end cap to form an internal environment for the battery cell 11, where this internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The bottom shell and the end caps can be independent components. An opening can be provided on the bottom shell, and the end caps can be closed over the openings to form the internal environment of the battery cell 11. The end caps and the bottom shell can also be integrated. Specifically, the end caps and the bottom shell can form a common connection surface before other components are inserted into the shell. When the interior of the bottom shell needs to be encapsulated, the end caps can be closed over the bottom shell. The bottom shell can be of various shapes and sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the bottom shell can be determined according to the specific shape and size of the electrode assembly. The bottom shell can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The electrode assembly is the component in the battery cell 11 where the electrochemical reaction occurs. The bottom shell can contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The active material portions of the positive and negative electrodes form the main body of the electrode assembly, while the portions of the positive and negative electrodes without active material each form a tab. The positive and negative tabs can be located together at one end of the main body or separately at opposite ends. During the battery's charge and discharge processes, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current circuit.

[0090] In one example, the entire lower housing 20 is a silicate mixed layer. In another example, a portion of the lower housing 20 is a silicate mixed layer. In this example, if the lower housing 20 is divided along its thickness into a top portion, a bottom portion, and a middle portion located between the top and bottom portions, the silicate mixed layer can be located at the top of the lower housing 20, i.e., the silicate mixed layer forms the top portion of the lower housing 20. Alternatively, the silicate mixed layer can be located at the bottom of the lower housing 20, i.e., the silicate mixed layer forms the bottom portion of the lower housing 20. Alternatively, the silicate mixed layer can be located in the middle portion of the lower housing 20, i.e., the silicate mixed layer forms the middle portion of the lower housing 20.

[0091] Of course, in other examples, the lower box body 20 may also include multiple silicate mixed layers, and the multiple silicate mixed layers may be arranged at intervals along the thickness direction of the lower box body 20 .

[0092] When the lower box body 20 is partially formed of a silicate mixed layer, the lower box body 20 may further include other anti-corrosion layers, heat dissipation layers, and the like.

[0093] The silicate mixture layer is made of a silicate mixture, including calcium silicate, limestone, clay, and steel slag (iron powder). The main components of limestone are calcium oxide and magnesium oxide, the main components of clay are silicon dioxide and aluminum oxide, and the main component of steel slag is iron oxide.

[0094] Among them, the cost of the silicate mixed layer is relatively low. Using the silicate mixed layer as the main material of the lower box 20 greatly reduces the manufacturing cost of the lower box 20. At the same time, after the silicate mixed layer is formed and solidified, its structural strength is relatively high, which can make the lower box 20 have higher structural rigidity and support strength. In addition, the silicate mixed layer has strong high temperature resistance and certain thermal insulation and corrosion resistance capabilities; among them, the strong high temperature resistance can reduce the risk of damage to the lower box 20 due to thermal runaway of the battery cell 11, and can effectively improve the fire resistance of the battery device 100. The better thermal insulation capability can reduce the energy loss of the heat exchange fluid in the heat exchange plate 30, reduce the energy consumption of thermal management, and at the same time reduce the generation of condensation on the support wall 21 of the lower box 20. The better anti-corrosion ability and longer service life can enable the battery device 100 to maintain a longer service life in various harsh working conditions.

[0095] In one example, the battery assembly 10 is located on the side of the heat exchange plate 30 facing away from the lower case 20 and contacts at least partially the heat exchange plate 30 to cool or heat the battery cells 11 in the battery assembly 10, ensuring that the battery cells 11 are used at an appropriate temperature. The battery assembly 10 and the heat exchange plate 30 may be in direct or indirect contact. For example, when the battery assembly 10 is bonded to the support wall 21 of the lower case 20 using a thermally conductive structural adhesive, the battery assembly 10 is in indirect contact with the support wall 21 of the lower case 20 via the thermally conductive structural adhesive.

[0096] As an example, the orthographic projection of the battery assembly 10 on the heat exchange plate 30 overlaps with the heat exchange plate 30. In this case, the battery assembly 10 contacts the entire heat exchange plate 30. As another example, the orthographic projection of the battery assembly 10 on the heat exchange plate 30 is located within the heat exchange plate 30. In this case, the battery assembly 10 contacts a portion of the heat exchange plate 30.

[0097] Of course, in other embodiments, the battery assembly 10 may also contact one of the heat exchange plate 30 and the lower box 20 and not contact the other, or may contact the heat exchange plate 30 and the lower box 20 separately.

[0098] In one example, the battery assembly 10 is disposed on a side of the heat exchange plate 30 facing away from the support wall 21 .

[0099] The heat exchange plate 30 is provided with a heat exchange channel (not shown) for flowing a heat exchange fluid to provide thermal management for the multiple battery cells 11. During the manufacturing process of the heat exchange plate 30, a sheet material is stamped to form a first groove corresponding to the heat exchange channel. An upper cover is then placed on one side of the stamped sheet material to seal the notch of the first groove, thereby obtaining the heat exchange plate 30 having the heat exchange channel.

[0100] Of course, in other embodiments, heat exchange channels can be provided on the heat exchange plate 30 in other forms. For example, a hose can be embedded on the outside of the heat exchange plate 30 to form a heat exchange channel in the hose. The heat exchange channel can be used to supply heat exchange fluid. The heat exchange fluid can include but is not limited to air flow, cooling water, cooling oil or deionized water. When the battery cell 11 needs to be cooled, a heat exchange fluid with a lower temperature than the battery cell 11 can be injected into the heat exchange channel. When the battery cell 11 needs to be heated, a heat exchange fluid with a higher temperature than the battery cell 11 can be injected into the heat exchange channel. Thus, the heat exchange plate 30 is provided with a heat exchange channel for supplying heat exchange fluid. The multiple battery cells 11 are in contact with the heat exchange plate 30. The multiple battery cells 11 can be cooled or heated by the heat exchange fluid in the heat exchange channel, thereby improving the heat exchange efficiency of the battery device 100.

[0101] The accommodating groove 211 can be a blind groove, with the heat exchange plate 30 partially embedded in the accommodating groove 211. For example, the portion of the heat exchange plate 30 used for exchanging heat with the battery cells 11 is disposed within the accommodating groove 211. This allows the accommodating groove 211 to position the heat exchange plate 30 and increase the contact area between the heat exchange plate 30 and the support wall 21, thereby improving heat exchange efficiency.

[0102] In this embodiment, by having the lower housing 20 include at least a silicate mixed layer, the silicate mixed layer has a low cost, high strength, strong high-temperature resistance, and certain thermal insulation and corrosion resistance, resulting in a long service life. This significantly reduces the manufacturing cost of the lower housing 20, and also provides the lower housing 20 with high structural strength, improved high-temperature and corrosion resistance, and certain thermal insulation capabilities. This effectively reduces energy loss in the heat exchange plates 30, lowers thermal management energy consumption, and reduces the generation of condensate in the lower housing 20. Furthermore, by partially embedding the heat exchange plates 30 within the accommodating grooves 211, the accommodating grooves 211 can limit the heat exchange plates 30 and increase the contact area between the heat exchange plates 30 and the support wall 21, thereby improving heat exchange efficiency.

[0103] In one embodiment, combined Figure 6 、 Figure 8 and Figure 9 The heat exchange plate 30 includes a plurality of heat exchange tubes 31 ; the plurality of heat exchange tubes 31 are embedded in the accommodating groove 211 , and the side surface of the plurality of heat exchange tubes 31 facing the battery assembly 10 is flush with the side surface of the support wall 21 facing the battery assembly 10 .

[0104] In one example, a plurality of heat exchange tubes 31 may be spaced apart. Figure 9 There are multiple accommodating grooves 211, which are spaced apart along the first direction X. Each heat exchange tube 31 is embedded in a corresponding accommodating groove 211, and the contour of the accommodating groove 211 on the support wall 21 matches the contour of the heat exchange tube 31. For example, the groove width of the accommodating groove 211 is slightly larger than the radial dimension of the heat exchange tube 31, so that the heat exchange tube 31 can be easily embedded in the accommodating groove 211.

[0105] Of course, in other examples, the plurality of heat exchange tubes 31 may also be arranged closely adjacent to each other; or, some of the plurality of heat exchange tubes 31 may be arranged at intervals, and some may be arranged closely adjacent to each other.

[0106] The plane where all the heat exchange tubes 31 are located is parallel to the surface of the side of the support wall 21 of the lower box 20 facing the battery assembly 10. The plane where all the heat exchange tubes 31 are located can be the plane where the central axis of all the heat exchange tubes 31 is located; or it can be the plane where the top surface of all the heat exchange tubes 31 facing the battery assembly 10 is located. Multiple heat exchange tubes 31 can be distributed at intervals within the plane where they are located. Each heat exchange tube 31 is a tubular structure with openings at both ends. The hollow structure inside the heat exchange tube 31 forms a heat exchange channel. The heat exchange fluid enters the heat exchange channel through one end opening of the heat exchange tube 31 and flows out of the heat exchange channel through the other end opening, thereby exchanging heat with the battery cells 11 above the heat exchange channel through the heat exchange fluid flowing through the heat exchange tube 31.

[0107] As an example, the heat exchange tube 31 is a U-shaped tube, and the various parts of the U-shaped tube are in the same plane, which is parallel to the side surface of the lower box 20 facing the battery assembly 10, so that various parts of the U-shaped tube can contact the battery assembly 10, thereby improving the heat exchange efficiency.

[0108] The heat exchange tube 31 can be a hot and cold cycle aluminum tube. The hot and cold cycle aluminum tube can be made by aluminum extrusion. Compared with the commonly used stamped and welded liquid cooling plate, the aluminum tube heat exchange plate 30 is cheaper.

[0109] In this embodiment, by making the side surface of the multiple heat exchange tubes 31 facing the battery assembly 10 flush with the side surface of the support wall 21 facing the battery assembly 10, the battery assembly 10 can be brought into contact with the multiple heat exchange tubes 31 to exchange heat with the multiple battery cells 11 of the battery assembly 10 through the heat exchange tubes 31; the multiple battery cells 11 can also be brought into contact with the lower box body 20 to provide better strength support to the multiple battery cells 11 through the lower box body 20.

[0110] In one embodiment, the Figure 5 and Figure 9 The lower housing 20 further includes a side wall 23 connected to the support wall 21, protruding from the support wall 21, and cooperating with the support wall 21 to form a receiving cavity. At least a portion of the battery assembly 10 along its height direction Z and the heat exchange plate 30 are disposed within the receiving cavity.

[0111] It can be understood that the lower box body 20 is a basin-shaped structure with high side walls on all sides and a concave center. The heat exchange plate 30 is arranged inside the basin cavity and embedded in the inner surface of the bottom of the basin-shaped structure.

[0112] Among them, the side wall 23 and the support wall 21 can be integrally formed by pouring a silicate mixture to improve the sealing of the lower box body 20. In one example, the ratio of the height of the side wall 23 to the height of the battery assembly 10 can be greater than 0 and less than 0.5. Exemplarily, the ratio can be greater than 0 and less than 0.4; or the ratio can be greater than 0 and less than 0.3; or the ratio can be greater than 0 and less than 0.2; or the ratio can be greater than 0 and less than 0.1. In these examples, part of the battery assembly 10 along its height direction Z is arranged in the accommodating cavity. It should be noted that the "height" involved in this application refers to the dimension along the height direction Z of the battery assembly 10.

[0113] In this embodiment, the basin-shaped lower box body 20 has better structural strength and stability. Moreover, the basin-shaped lower box body 20 can better withstand external pressure and impact, thereby protecting the battery assembly 10 loaded therein and reducing the risk of damage to the battery assembly 10.

[0114] In one embodiment, see Figure 11 , Figure 11 Schematic diagram of the back side of the lower box body 20 provided in one embodiment of the present application; a first crossbeam 212 and / or a second crossbeam (not shown) is provided on the side surface (i.e., the back side) of the support wall 21 facing away from the battery assembly 10; the first crossbeam 212 extends along a first direction X; the second crossbeam extends along a second direction Y intersecting with the first direction X.

[0115] As an example, one of the first crossbeam 212 and the second crossbeam is provided on the side surface of the support wall 21 facing away from the battery assembly 10. As another example, both the first crossbeam 212 and the second crossbeam are provided on the side surface of the support wall 21 facing away from the battery assembly 10 to increase the structural strength of the support wall 21.

[0116] The first direction X may be perpendicular to the second direction Y. The support wall 21 of the lower housing 20 has a length along the first direction X that is shorter than its length along the second direction Y. As an example, the support wall 21 of the lower housing 20 is rectangular, with the first direction X being the width of the support wall 21 and the second direction Y being the length of the support wall 21. Of course, in other embodiments, the angle between the first direction X and the second direction Y may also be acute or obtuse.

[0117] Among them, the first crossbeam 212 extends from one side of the support wall 21 to the other side along the first direction X; the second crossbeam extends from one side of the support wall 21 to the other side along the second direction Y, so as to improve the bending strength of the support wall 21 along the first direction X through the first crossbeam 212, and improve the bending strength of the support wall 21 along the second direction Y through the second crossbeam.

[0118] Combine Figure 11It can be understood that the thickness of the support wall 21 of the lower box body 20 corresponding to the positions of the first cross beam 212 and the second cross beam is greater than the thickness of other positions.

[0119] The embodiment can improve the structural strength of the lower box body 20 through the first cross beam 212 and / or the second cross beam in a part of the support wall 21 of the lower box body 20. On the one hand, the structural strength of the lower box body 20 can be improved through the first cross beam 212 and / or the second cross beam. On the other hand, compared with the case that the support wall 21 of the entire lower box body 20 is provided with the thickness corresponding to the positions of the first cross beam 212 and the second cross beam, the thickness of the lower box body 20 except the positions of the first cross beam 212 and the second cross beam can be reduced, thereby reducing the weight of the lower box body 20 and reducing the cost.

[0120] In an embodiment, the first cross beam 212 is provided with a first reinforcing rib (not shown in the figure), and the extending direction of the first reinforcing rib is the same as the extending direction of the first cross beam 212; and / or the second cross beam is provided with a second reinforcing rib (not shown in the figure), and the extending direction of the second reinforcing rib is the same as the extending direction of the second cross beam.

[0121] The first reinforcing rib and / or the second reinforcing rib can be a metal structure such as a reinforcing bar or a square tube. The first reinforcing rib can penetrate through the entire first cross beam 212 along the extending direction of the first cross beam 212. One or more first reinforcing ribs can be arranged in the first cross beam 212. In some examples, the first reinforcing rib can also intersect the extending direction of the first cross beam 212. Alternatively, part of the first reinforcing rib is the same as the extending direction of the first cross beam 212, and part of the first reinforcing rib intersects the extending direction of the first cross beam 212.

[0122] Similarly, the second reinforcing rib can penetrate through the entire second cross beam along the extending direction of the second cross beam. One or more second reinforcing ribs can be arranged in the second cross beam. In some examples, the second reinforcing rib can also intersect the extending direction of the second cross beam. Alternatively, part of the second reinforcing rib is the same as the extending direction of the second cross beam, and part of the second reinforcing rib intersects the extending direction of the second cross beam.

[0123] In the embodiment, the structural strength of the lower box body 20 can be further improved by further arranging the first reinforcing rib in the first cross beam 212 and / or the second reinforcing rib in the second cross beam, thereby improving the supporting strength of the lower box body 20 to the battery assembly 10 and the bending strength of the lower box body 20.

[0124] In an embodiment, referring to Figures 12 to 13 , Figure 12 a structural schematic diagram of the reinforcing frame 22 provided in an embodiment of the application; Figure 13This is a perspective view of a lower box 20 according to an embodiment of the present application. A reinforcement frame 22 is provided inside the lower box 20; and / or a fiber structure (not shown) is dispersed inside the lower box 20; the fiber structure includes a steel fiber structure or a glass fiber structure.

[0125] A fiber structure is composed of continuous or discontinuous filaments, often in the form of threads, strips, or ribbons. Dispersing the fiber structure within the main frame (e.g., box 20 below) is similar to mixing hay in soil. This structure maintains the main frame's structure and provides high strength and durability.

[0126] Steel fiber structure refers to a fiber structure with an aspect ratio (the ratio of fiber length to its diameter; when the fiber cross-section is non-circular, the diameter of the equivalent cross-sectional circular area is converted) of 40 to 80, which is made by cutting fine steel wire, shearing cold-rolled strip, milling steel ingots or rapid condensation of molten steel.

[0127] Glass fiber is an inorganic, non-metallic material made from natural or synthetic quartz through a series of processes, including high-temperature melting, drawing, and winding. The diameter of a single fiber typically ranges from a few microns to over 20 microns, equivalent to 1 / 20 to 1 / 5 the diameter of a human hair. Each fiber strand is composed of hundreds or even thousands of individual filaments.

[0128] As an example, a reinforcing frame 22 or a fiber structure is provided inside the lower box 20. As another example, both a reinforcing frame 22 and a fiber structure are provided inside the lower box 20 to improve the structural strength of the lower box 20.

[0129] The reinforcement frame 22 can be in a grid-like configuration; for example, it can be a wire mesh. Exemplarily, the reinforcement frame 22 includes a plurality of third reinforcing ribs 221 and a plurality of fourth reinforcing ribs 222. The plurality of third reinforcing ribs 221 are spaced apart along the second direction Y, each extending along the first direction X. The plurality of fourth reinforcing ribs 222 are spaced apart along the first direction X, each extending along the second direction Y. Each third reinforcing rib 221 is in contact with and connected to each of the plurality of fourth reinforcing ribs 222.

[0130] The reinforcement frame 22 can be installed on the top, bottom, or middle of the lower box 20. In one example, the reinforcement frame 22 is installed within the support wall 21 of the lower box 20. The area enclosed by the reinforcement frame 22 can be the same as or slightly smaller than the area of ​​the support wall 21. Of course, in other examples, if the lower box 20 also includes side walls 23, the reinforcement frame 22 can also be installed within the side walls 23 of the lower box 20.

[0131] In one example, the fiber structure is uniformly dispersed throughout the lower housing 20. Exemplarily, the lower housing 20 includes a silicate mixed layer and the fiber structure uniformly dispersed within the silicate mixed layer.

[0132] In another example, a portion of the lower box body 20 is uniformly dispersed with the fiber structure; for example, the top, bottom, or middle portion of the lower box body 20 is dispersed with the fiber structure.

[0133] In this embodiment, a reinforcing frame 22 is provided inside the lower box body 20, and / or a fiber structure is dispersed inside the lower box body 20; this can greatly improve the structural strength of the lower box body 20 and effectively reduce the risk of cracking of the lower box body 20.

[0134] In one embodiment, see Figure 11 The length of the support wall 21 along the first direction X is less than the length of the support wall 21 along the second direction Y; the support wall 21 is provided with lifting holes on both sides along the first direction X.

[0135] The lifting holes extend along the first direction X, and at least one lifting hole is provided on each side of the support wall 21 of the lower box body 20 along the first direction X. The lifting holes on one side of the support wall 21 along the first direction X are provided in a one-to-one correspondence with the lifting holes on the other side along the first direction X.

[0136] As an example, the support wall 21 of the lower case 20 is provided with multiple lifting holes on each side along the first direction X; the multiple lifting holes are spaced apart along the second direction Y to improve stability during the lifting process. Exemplarily, the support wall 21 of the lower case 20 is provided with two lifting holes on each side along the first direction X. The two lifting holes are distributed on both sides of the support wall 21 along the second direction Y and are located near the edge of the support wall 21 along the second direction Y to improve lifting stability and reduce the risk of the battery device 100 tilting during lifting.

[0137] Of course, in other examples, a lifting hole can be provided on each side of the support wall 21 of the lower box body 20 along the first direction X; the lifting hole can be provided in the middle position of the support wall 21 along the second direction Y to improve the lifting balance and reduce the risk of the battery device 100 tilting during the lifting process.

[0138] Among them, the lifting hole can be a blind hole structure with one end open; or the lifting hole can be a through hole structure with both ends open, that is, the lifting hole passes through the support wall 21 along the first direction X. At this time, it can be understood that the two lifting holes arranged opposite to each other on both sides of the support wall 21 along the first direction X constitute a through hole structure.

[0139] In this embodiment, the hoisting and carrying of the battery device 100 can be realized through the hoisting holes, and the hoisting holes are arranged on both sides of the support wall 21 along the first direction X. Compared with the scheme of arranging the hoisting holes on both sides of the support wall 21 along the second direction Y, the distance between the two hoisting holes is shorter, so that the possibility of the battery device 100 shaking in the air can be reduced, thereby improving the stability during hoisting. Moreover, the shorter distance can make the force of the hoisting device more evenly distributed on the battery device 100, reduce the stress concentration of a specific part, and reduce the risk of material fatigue and damage. In addition, when the distance between the two hoisting holes is shorter, it is easier to align and fix, especially in a narrow space or a high-precision positioning situation, which can simplify the entire hoisting process.

[0140] In one embodiment, the battery device 100 further comprises a hoisting insert 40 embedded in the hoisting hole, the strength of the hoisting insert 40 is greater than that of the silicate mixed layer, and the hoisting insert 40 is provided with a hoisting insertion hole.

[0141] For example, one hoisting insert 40 is arranged in one hoisting hole. When a plurality of hoisting holes are arranged on the support wall 21, one hoisting insert 40 can be arranged in each hoisting hole. Alternatively, hoisting inserts 40 can be arranged in part of the hoisting holes, and the remaining hoisting holes can not be provided with hoisting inserts 40.

[0142] The opening of the hoisting insertion hole faces the outside of the support wall 21 of the lower box 20. One end of the hoisting insert 40 where the opening is located can be exposed to the support wall 21. In this way, during the alignment of the hoisting device and the hoisting insertion hole, the risk of the hoisting device knocking against the support wall 21, damaging the support wall 21, or the support wall 21 falling off can be reduced.

[0143] Of course, the hoisting insert 40 can also be entirely embedded in the support wall 21. At this time, the opening of the hoisting insert 40 can be flush with the opening of the hoisting hole. In this way, during hoisting, the force applied by the hoisting device acts on the hoisting insert 40, which can reduce damage to the hoisting hole, improve the connection stability of the hoisting insert 40 in the hoisting hole, and further improve the hoisting stability.

[0144] In this embodiment, since the strength of the hoisting insert 40 is greater than that of the silicate mixed layer, by arranging the hoisting insert 40 in the hoisting hole and hoisting the battery device 100 through the hoisting insert 40, the risk of damaging the lower box 20 and / or falling off during hoisting can be reduced, and the risk of the battery device 100 falling or tilting during hoisting can be reduced.

[0145] In one embodiment, in combination with Figure 5 , Figure 6 and Figure 9A first mounting hole is provided at both ends of the support wall 21 on one side surface facing the battery assembly 10 along the second direction Y, and a first connecting insert 213 is provided in the first mounting hole; the battery assembly 10 is connected to the first connecting insert 213 through the first connecting column 214 to connect to the lower box body 20.

[0146] The support wall 21 is provided with at least one first mounting hole at each end along the second direction Y. The first mounting holes at the same end of the support wall 21 along the second direction Y and the first mounting holes at the other end may be provided correspondingly along the second direction Y.

[0147] As an example, the support wall 21 of the lower case 20 is provided with a plurality of first mounting holes at each end along the second direction Y; the plurality of first mounting holes are spaced apart along the first direction X to better secure the battery assembly 10. The plurality of first mounting holes can be distributed in the gaps between the plurality of accommodating grooves 211 so that the fixing position of the first connecting column 214 avoids the heat exchange tube 31, reducing the risk of damage to the heat exchange plate 30 or the accommodating groove 211.

[0148] Exemplarily, at least one first mounting hole is provided on both sides of each receiving groove 211 along the first direction X. For example, one or two first mounting holes are provided respectively, and the specific number of holes can be set according to the gap between two adjacent receiving grooves 211 .

[0149] The number of the first connecting inserts 213 is the same as the number of the first mounting holes, and one first connecting insert 213 corresponds to one first mounting hole.

[0150] The strength of the first connecting insert 213 may be greater than the strength of the supporting wall 21. The first connecting insert 213 may be a metal connecting insert, for example, the first connecting insert 213 may be a connecting insert made of steel, iron, or a steel alloy.

[0151] In one example, the first connection insert 213 may be a nut insert having a threaded hole, and the first connection column 214 may be a stud that is screwed into the threaded hole to fix the battery assembly 10 to the lower box 20 .

[0152] Of course, in other examples, the first connecting insert 213 and the first connecting column 214 may also be connected by interference fit or snap fit.

[0153] In this embodiment, the battery assembly 10 can be stably fixed in the lower box body 20; and by embedding the first connecting insert 213 on the support wall 21 and fixing the battery assembly 10 in conjunction with the first connecting column 214, compared with directly connecting to the connection hole of the support wall 21 through the first connecting column 214, the support wall 21 of the silicate mixed layer has a lower strength and is prone to falling off during the connection process; the first connecting insert 213 has a higher strength, which can effectively reduce the risk of damage to the lower box body 20 and / or falling off of the first connecting column 214 during the connection process; and at the same time, the bonding stability between the first connecting column 214 and the support wall 21 can be improved.

[0154] In one embodiment, the Figure 4 and Figure 9 The end surface of the side wall 23 facing away from the support wall 21 has a second mounting hole, and a second connecting insert 231 is arranged in the second mounting hole; the battery device 100 also includes an upper box body 50, which is arranged on the lower box body 20, and the upper box body 50 is connected to the second connecting insert 231 through a second connecting column 232 to connect with the lower box body 20.

[0155] The end surface of the side wall 23 facing away from the support wall 21 (hereinafter referred to as the mounting sealing surface) can be provided with a plurality of second mounting holes, which are spaced apart along the circumference of the side wall 23. In one example, the plurality of second mounting holes are evenly distributed along the circumference of the side wall 23 to improve the sealing and stability of the connection between the upper case 50 and the lower case 20.

[0156] The number of the second connecting inserts 231 is the same as the number of the second mounting holes, and one second connecting insert 231 corresponds to one second mounting hole.

[0157] The strength of the second connecting insert 231 may be greater than the strength of the side wall 23. The second connecting insert 231 may be a metal connecting insert, for example, the second connecting insert 231 may be a connecting insert made of steel, iron, or a steel alloy.

[0158] In one example, the second connection insert 231 may be a metal nut insert having a threaded hole, and the second connection column 232 may be a stud that is screwed into the threaded hole to achieve connection between the upper box body 50 and the lower box body 20 .

[0159] Of course, in other examples, the second connecting insert 231 and the second connecting column 232 may also be connected by interference fit or snap fit.

[0160] In one example, the upper box body 50 and the lower box body 20 are connected and buckled to form a closed cavity structure, and the battery assembly 10 is disposed in the cavity structure to protect the battery assembly 10.

[0161] In one example, the lower housing 20 further includes a sealing gasket (not shown) disposed between the upper housing 50 and the mounting sealing surface of the side wall 23. The sealing gasket is used to seal the gap between the upper housing 50 and the mounting sealing surface and provide a certain buffering and thermal insulation effect. The sealing gasket may be a silicone gasket or a sealing ring.

[0162] In this embodiment, the upper case 50 and the lower case 20 can form a complete, sealed internal environment of the battery device 100 to protect the battery assembly 10. Furthermore, by embedding the second connecting insert 231 in the mounting sealing surface of the side wall 23 and securing the upper case 50 with the second connecting post 232, compared to directly providing a connecting hole in the mounting sealing surface, the second connecting post 232 is directly connected to the connecting hole in the mounting sealing surface. Because the side wall 23 of the silicate mixed layer has low strength and is prone to chipping during the connection process, the second connecting insert 231 is relatively strong, effectively reducing the risk of damage to the lower case 20 and / or chipping of the second connecting post 232 during the connection process. Furthermore, the bonding stability and sealing between the second connecting post 232 and the side wall 23 can be improved.

[0163] In one embodiment, see Figure 6 、 Figure 9 and Figure 14 , Figure 14 This is a schematic diagram of the structure of the heat exchange plate 30 provided in one embodiment of the present application. The side wall 23 has a water inlet hole 233 and a water outlet hole 234; the heat exchange plate 30 also includes a collector 32, which is connected to the side wall 23 and has a water inlet structure 33 (see below). Figure 15 ) and a water outlet structure 34; the water inlet structure 33 includes a water inlet nozzle 331, which extends out of the accommodating cavity through the water inlet hole 233; the water outlet structure 34 includes a water outlet nozzle 341, which extends out of the accommodating cavity through the water outlet hole 234; wherein, along a direction perpendicular to the height direction Z of the battery device 100, multiple heat exchange tubes 31 are arranged on one side of the current collector 32, and both ends of each heat exchange tube 31 are respectively connected to the water inlet nozzle 331 and the water outlet nozzle 341.

[0164] The water inlet 233 and the water outlet 234 each penetrate the sidewall 23 of the lower case 20. The water inlet 233 and the water outlet 234 are located at the same end of the lower case 20 along the second direction Y. This application defines the end of the lower case 20 where the water inlet 233 and the water outlet 234 are located as the front end of the lower case 20. After the heat exchange plate 30 is installed on the lower case 20, the current collector 32 is located at the front end of the lower case 20. Components such as the connector mounting panel of the battery assembly 100 are also mounted to the front end of the lower case 20.

[0165] As an example, combining Figure 10The water inlet hole 233 and the water outlet hole 234 respectively include a first hole part 2331 and a second hole part 2332. The first hole part 2331 is located at one end of the second hole part 2332 away from the containing cavity, and the aperture of the first hole part 2331 is larger than the aperture of the second hole part 2332. A first connecting hole 2333 is formed in the bottom wall of the first hole part 2331.

[0166] The water inlet nozzle 331 is arranged in the second hole part 2332 of the water inlet hole 233 and extends out of the water inlet hole 233 through the first hole part 2331. The outer diameter of the water inlet nozzle 331 is the same as the outer diameter of the second hole part 2332 of the water inlet hole 233 to improve the sealing performance, or the outer diameter of the water inlet nozzle 331 is slightly smaller than the outer diameter of the second hole part 2332 of the water inlet hole 233 to facilitate the arrangement of the water inlet nozzle 331 in the water inlet hole 233.

[0167] Similarly, the water outlet nozzle 341 is arranged in the second hole part 2332 of the water outlet hole 234 and extends out of the water outlet hole 234 through the first hole part 2331. The outer diameter of the water outlet nozzle 341 is the same as the outer diameter of the second hole part 2332 of the water outlet hole 234 to improve the sealing performance, or the outer diameter of the water outlet nozzle 341 is slightly smaller than the outer diameter of the second hole part 2332 of the water outlet hole 234 to facilitate the arrangement of the water outlet nozzle 341 in the water outlet hole 234.

[0168] For example, the first hole part 2331 and the second hole part 2332 of the water inlet hole 233 and / or the water outlet hole 234 are coaxially arranged. Of course, in other examples, the central axis of the first hole part 2331 of the water inlet hole 233 and / or the water outlet hole 234 and the central axis of the corresponding second hole part 2332 can not be on the same straight line.

[0169] The current collector 32 has a liquid inlet cavity and a liquid outlet cavity arranged at intervals. One end of the water inlet nozzle 331 is in communication with the liquid inlet cavity, and the other end extends out of the containing cavity through the water inlet hole 233 to be in communication with the liquid inlet pipe. One end of the water outlet nozzle 341 is in communication with the liquid outlet cavity, and the other end extends out of the containing cavity through the water outlet hole 234 to be in communication with the liquid outlet pipe. One end of each heat exchange pipe 31 is in communication with the liquid inlet cavity, so that the heat exchange fluid flows into the heat exchange pipe 31 through the water inlet nozzle 331 and the liquid inlet cavity in sequence. The other end of each heat exchange pipe 31 is in communication with the liquid outlet cavity, so that the heat exchange fluid in the heat exchange pipe 31 flows out of the heat exchange plate 30 through the liquid outlet cavity and the water outlet nozzle 341 in sequence, thereby realizing the circulation of the heat exchange fluid in the heat exchange plate 30.

[0170] The plane in which the current collector 32 is located can be perpendicular to the plane in which the plurality of heat exchange pipes 31 are located.

[0171] In this embodiment, the water inlet nozzle 331 and the water outlet nozzle 341 extend out of the lower box body 20 to be connected to the liquid inlet pipe and the liquid outlet pipe, respectively, so that the heat exchange fluid can enter the heat exchange plate 30 and circulate, thereby heat-exchanging the battery monomer 11.

[0172] In one embodiment, referring to Figures 15 to 17 , Figure 15 for Figure 14 an enlarged view of A in FIG. 1 1 ; Figure 16 is a structural schematic view of the heat exchange plate 30 provided by an embodiment of the present application from a third perspective on the lower box body 20; Figure 17 is Figure 16 an enlarged view of B of the structure shown in FIG. 1 1.

[0173] The water inlet structure 33 further comprises a first flange plate 332 and a first sealing ring 333. The first flange plate 332 is arranged on a side surface of the current collector 32 away from the plurality of heat exchange tubes 31, and a circumferential edge of the first flange plate 332 is arranged around the water inlet hole 233 and is attached to the side wall 23. The water inlet nozzle 331 is connected to the first flange plate 332. The first sealing ring 333 is arranged on the first flange plate 332 and is configured to seal the gap between the side wall 23 and the first flange plate 332.

[0174] The water outlet structure 34 comprises a second flange plate and a second sealing ring. The second flange plate is arranged on a side surface of the current collector 32 away from the plurality of heat exchange tubes 31, and a circumferential edge of the second flange plate is arranged around the water outlet hole 234 and is attached to the side wall 23. The water outlet nozzle 341 is connected to the second flange plate. The second sealing ring is arranged on the second flange plate and is configured to seal the gap between the side wall 23 and the second flange plate.

[0175] The first flange plate 332 and the second flange plate directly or indirectly abut the lower box body 20 to play a sealing role.

[0176] The circumferential edge of the first flange plate 332 is arranged around the water inlet hole 233 in the orthographic projection of the side wall 23 of the lower box body 20. A first threaded hole 335 is formed in the first flange plate 332 and is arranged corresponding to the bottom wall of the first hole portion 2331 of the water inlet hole 233; see Figure 16 and Figure 17 When the heat exchange plate 30 is arranged on the lower box body 20, the first connecting bolt 334 passes through the first connecting hole 2333 (see Figure 10 ) of the water inlet hole 233 and is screwed into the first threaded hole 335 to fix the first flange plate 332 on the side wall 23 of the lower box body 20.

[0177] Similarly, the circumferential edge of the second flange plate is arranged around the water outlet hole 234 in the orthographic projection of the side wall 23 of the lower box body 20. The water outlet nozzle 341 passes through the second flange plate and communicates with the current collector 32. A second threaded hole is also formed in the second flange plate and is arranged corresponding to the bottom wall of the first hole portion 2331 of the water outlet hole 234; see Figure 16 and Figure 17When the heat exchange plate 30 is arranged in the lower box body 20, the second connecting bolt passes through the first connecting hole 2333 of the water outlet hole 234 and is screwed into the second threaded hole to fix the second flange plate on the side wall 23 of the lower box body 20.

[0178] The first sealing ring 333 is arranged on the side of the first flange plate 332 facing the side wall 23 of the lower box body 20, and at least part of the first sealing ring 333 protrudes from the first flange plate 332 along the second direction Y. When the current collector 32 is installed on the lower box body 20, the first sealing ring 333 is clamped between the first flange plate 332 and the side wall 23 of the lower box body 20 to seal the gap between the side wall 23 and the first flange plate 332, thereby improving the sealing performance of the containing cavity. For example, the first sealing ring 333 can be sleeved on the inner side of the first flange plate 332 and be in interference fit with the first flange plate 332. The first sealing ring 333 can be a silica gel ring.

[0179] The second sealing ring is arranged on the side of the second flange plate facing the side wall 23 of the lower box body 20, and at least part of the second sealing ring protrudes from the second flange plate along the second direction Y. When the current collector 32 is installed on the lower box body 20, the second sealing ring is clamped between the second flange plate and the side wall 23 of the lower box body 20 to seal the gap between the side wall 23 and the second flange plate, thereby improving the sealing performance of the containing cavity. For example, the second sealing ring can be sleeved on the inner side of the second flange plate and be in interference fit with the second flange plate. The second sealing ring can be a silica gel ring.

[0180] In this embodiment, the sealing between the current collector 32 and the side wall around the water inlet hole 233 can be achieved by the first flange plate 332 and the first sealing ring 333, and the sealing between the current collector 32 and the side wall around the water outlet hole 234 can be achieved by the second flange plate and the second sealing ring, thereby ensuring the overall sealing performance of the lower box body 20 while leading out the water inlet nozzle 331 and the water outlet nozzle 341.

[0181] In one embodiment, the silicate mixed layer is a cement layer or a concrete layer.

[0182] The entire lower box body 20 can be integrally formed. For example, the entire lower box body 20 is a cement box body or a concrete box body.

[0183] The material of the cement layer can include silicates, aluminates, ferrites, and gypsum. Silicates are one of the most important components in cement, mainly composed of silicon, oxygen, and calcium elements. Common silicate compounds include tricalcium silicate and dicalcium silicate. Aluminates such as tricalcium aluminate. Ferrites such as tetracalcium aluminoferrite, which is also one of the important components in cement. An appropriate amount of gypsum is added to cement to adjust the setting time of cement.

[0184] The materials of a concrete layer may include cement, aggregates, water, admixtures, and additives. Cement, as the cementitious material of concrete, forms a cementitious body by hydrating with water, making the concrete strong. Common types of cement include Portland cement and ordinary hardened cement. Aggregates are divided into coarse aggregates (such as gravel) and fine aggregates (such as sand). Aggregates act as a skeleton in concrete, providing strength and volume. Water is used to activate cement, causing it to hydrate and form a hard structure. Admixtures such as fly ash and slag powder can improve the performance of concrete and reduce the amount of cement used. Admixtures such as water reducers, retarders, and accelerators are used to improve the workability and durability of concrete.

[0185] In this embodiment, the cement and concrete layers are made of relatively inexpensive and readily available materials, resulting in low maintenance costs. Furthermore, the concrete layer has a long lifespan, good durability, and high reliability, making it suitable for long-term storage. Furthermore, the concrete or cement layer can better resist the effects of ultraviolet rays, corrosion, and other factors.

[0186] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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: Battery components; a lower box body comprising at least a silicate mixed layer; The lower box includes a support wall configured to support the battery assembly; The heat exchange plate is arranged in the lower box; the battery assembly is in contact with the heat exchange plate and / or the lower box; the support wall has a receiving groove; at least a portion of the heat exchange plate is embedded in the receiving groove.

2. The battery device according to claim 1, wherein: The heat exchange plate includes a plurality of heat exchange tubes; the plurality of heat exchange tubes are embedded in the accommodating groove, and a side surface of the plurality of heat exchange tubes facing the battery assembly is flush with a side surface of the support wall facing the battery assembly.

3. The battery device according to claim 2, characterized in that The lower box body also includes a side wall, which is connected to the support wall, protrudes from the support wall, and cooperates with the support wall to form a accommodating cavity; at least a portion of the battery assembly along its height direction and the heat exchange plate are both arranged in the accommodating cavity.

4. The battery device according to claim 1, wherein: A first crossbeam and / or a second crossbeam is provided on a side surface of the support wall of the lower box body facing away from the battery assembly; the first crossbeam extends along a first direction; and the second crossbeam extends along a second direction intersecting with the first direction.

5. The battery device according to claim 4, wherein: A first reinforcing rib is provided in the first crossbeam, and an extending direction of the first reinforcing rib is the same as an extending direction of the first crossbeam; and / or A second reinforcing rib is provided in the second crossbeam, and an extending direction of the second reinforcing rib is the same as an extending direction of the second crossbeam.

6. The battery device according to any one of claims 1 to 5, characterized in that: A reinforcing frame is provided inside the lower box body; and / or a fiber structure is dispersed inside the lower box body; the fiber structure includes a steel fiber structure or a glass fiber structure.

7. The battery device according to any one of claims 1 to 5, characterized in that: The length of the support wall of the lower box along the first direction is smaller than the length of the support wall along the second direction; and hoisting holes are provided on both sides of the support wall along the first direction.

8. The battery device according to claim 7, characterized in that Also includes: A hoisting insert is embedded in the hoisting hole, the strength of the hoisting insert is greater than the strength of the silicate mixed layer, and the hoisting insert is provided with a hoisting insertion hole.

9. The battery device according to any one of claims 1 to 5, characterized in that: The support wall of the lower box body is provided with first mounting holes at both ends along the second direction on one side surface facing the battery assembly, and a first connecting insert is provided in the first mounting hole; the battery assembly is connected to the first connecting insert through a first connecting column to connect to the lower box body.

10. The battery device according to claim 3, wherein: The end surface of the side wall facing away from the supporting wall has a second mounting hole, and a second connecting insert is arranged in the second mounting hole; The battery device further includes an upper box body, which is disposed on the lower box body. The upper box body is connected to the second connecting insert via a second connecting column to be connected to the lower box body.

11. The battery device according to claim 3, wherein: The side wall has a water inlet and a water outlet; The heat exchange plate also includes a current collector, which is connected to the side wall and has a water inlet structure and a water outlet structure; the water inlet structure includes a water inlet nozzle, which extends out of the accommodating cavity through the water inlet hole; the water outlet structure includes a water outlet nozzle, which extends out of the accommodating cavity through the water outlet hole; wherein, along a direction perpendicular to the height direction of the battery device, the multiple heat exchange tubes are arranged on one side of the current collector, and the two ends of each of the heat exchange tubes are respectively connected to the water inlet nozzle and the water outlet nozzle.

12. The battery device according to claim 11, wherein: The water inlet structure further includes a first flange and a first sealing ring. The first flange is provided on a surface of the current collector facing away from the plurality of heat exchange tubes, and a circumferential edge of the first flange is provided around the water inlet hole and in contact with the side wall. The water inlet nozzle is connected to the first flange. The first sealing ring is provided on the first flange and is configured to seal a gap between the side wall and the first flange. The water outlet structure includes a second flange and a second sealing ring. The second flange is arranged on the side surface of the collector away from the multiple heat exchange tubes, and the circumferential edge of the second flange is arranged around the water outlet and fits with the side wall; the water outlet nozzle is connected to the second flange; the second sealing ring is arranged on the second flange and is configured to seal the gap between the side wall and the second flange.

13. The battery device according to any one of claims 1 to 5, characterized in that: The silicate mixed layer is a cement layer or a concrete layer.

14. An energy storage device, characterized in that: Comprising the battery device according to any one of claims 1 to 13.

15. An energy storage system, characterized in that: It comprises a power conversion device and the energy storage device as claimed in claim 14, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

16. A charging network, characterized in that: It comprises a charging pile and an energy storage device as claimed in claim 14, wherein the energy storage device is used to provide electrical energy for the charging pile.

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