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

Abstract

The embodiment of the utility model provides a battery device, an energy storage device, an energy storage system and a charging network, the battery device comprises a frame, a heat exchange part and a battery module, the heat exchange part is arranged on one side of the frame along a first direction, the battery module is arranged on one side of the heat exchange part deviating from the frame along the first direction, and the battery module comprises a battery assembly and an end plate, end plates are arranged at the two ends, in the second direction, of the battery assembly correspondingly, the first direction intersects with the second direction, and the end plates, the heat exchange piece and the frame are connected through first fastening components. The cost of the battery device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, and more particularly, to a battery device, an energy storage device, an energy storage system and a charging network. BACKGROUND

[0002] With the development of new energy technology, the application of battery device is more and more widely, such as applied to mobile phones, notebook computers, electric cars, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy aircraft and electric tools.

[0003] In the development of battery technology, how to reduce the cost of battery device is a technical problem that needs to be solved in battery technology. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device, an energy storage device, an energy storage system and a charging network, which is beneficial to reduce the cost of battery device.

[0005] In a first aspect, the present application provides a battery device, comprising: a frame; a heat exchange element arranged on one side of the frame along a first direction; a battery module arranged on one side of the heat exchange element away from the frame along the first direction, the battery module comprising a battery assembly and an end plate, the battery assembly being provided with an end plate at each end thereof along a second direction, the first direction intersecting the second direction; and a first fastening member, the end plate, the heat exchange element and the frame being connected by the first fastening member.

[0006] In some embodiments of the first aspect, the battery assembly can be arranged between the two end plates to form the battery module, and the end plate, the heat exchange element and the frame can be connected by the first fastening member, so that the battery module can be directly fixed with the heat exchange element and the frame, which is beneficial to reduce the number of parts of the battery device, simplify the processing and manufacturing process, and reduce the assembly difficulty, thereby reducing the material cost and assembly cost of the battery device.

[0007] In some embodiments, the first fastening member is arranged through the end plate and the heat exchange element along the first direction and is fixedly connected with the frame.

[0008] In the above technical solution, the first fastening member can connect the battery module, the heat exchange element and the frame into one body by the above-mentioned manner, so as to reduce the cost of the battery device.

[0009] In some embodiments, the first fastening member is arranged in the frame and is fixedly connected with the frame.

[0010] In the above technical solution, the first fastening member and the frame can be arranged more closely, which is also beneficial to improve the connection strength between the two.

[0011] In some embodiments, the frame has a cavity, and has a first wall and a second wall surrounding two sides of the cavity along a first direction, the first wall is closer to the heat exchange piece relative to the second wall, the first wall is provided with a first hole, and the first fastening member is arranged in the first hole and in the cavity.

[0012] In the above technical solution, by arranging the frame to have a cavity, the weight of the frame is reduced, thereby facilitating the lightweight design of the battery device.

[0013] In some embodiments, the heat exchange piece is provided with a second hole, the end plate is provided with a third hole, the first hole, the second hole and the third hole are connected along the first direction, and the first fastening member is arranged in the first hole, the second hole and the third hole.

[0014] In the above technical solution, the first fastening member can connect the battery module, the heat exchange piece and the frame into one body in the above manner, thereby reducing the cost of the battery device, and also facilitating the reduction of stress concentration problems in the connection process, thereby facilitating the improvement of the service life of the battery device.

[0015] In some embodiments, the first fastening member includes a first fastener and a second fastener, the first fastener is arranged in the second hole and the first hole to connect the heat exchange piece and the frame, and the second fastener is arranged in the third hole and connected with the first fastener.

[0016] In the above technical solution, the heat exchange piece and the frame are first fixed by the first fastener, and then the end plate is connected with the first fastener by the second fastener, so as to connect the battery module, the heat exchange piece and the frame into one body, thereby facilitating the processing and assembly.

[0017] In some embodiments, the first hole, the second hole and the third hole all extend along the first direction.

[0018] In the above technical solution, the first fastening member can be arranged in the first hole, the second hole and the third hole along the first direction, thereby facilitating the processing and assembly of the battery device.

[0019] In some embodiments, the first fastener includes a main body portion, a first connecting portion and a second connecting portion, the main body portion is arranged in the second hole and the first hole, and the second fastener is connected with the main body portion; the first connecting portion is connected to one end of the main body portion close to the heat exchange piece along the first direction and arranged around the main body portion, and the second connecting portion is connected to the circumferential side of the main body portion and arranged around the main body portion, the second connecting portion is arranged in the cavity, the heat exchange piece and the first wall abut between the first connecting portion and the second connecting portion, and the first connecting portion abuts between the heat exchange piece and the end plate.

[0020] In the technical scheme, the main body part is used to connect with the second fastener to enhance the stability of the connection, and the first connecting part and the second connecting part are arranged to enable the heat exchange element and the first wall to be more closely connected together to reduce the possibility of loosening.

[0021] In some embodiments, a gap is formed between the end plate and the heat exchange element in the first direction; and / or, the battery assembly protrudes from the side surface of the end plate towards the heat exchange element in the first direction; and / or, the battery assembly is supported by the heat exchange element.

[0022] In the technical scheme, the area of the first connecting part can be reduced to form a gap between the end plate and the heat exchange element, which is conducive to reducing the weight and material cost of the battery device, and the battery assembly can be arranged closer to the heat exchange element to improve the heat exchange efficiency between the heat exchange element and the battery assembly, thereby improving the performance of the battery device.

[0023] In some embodiments, the frame is provided with a first protrusion on the side thereof facing the heat exchange element in the first direction, the heat exchange element is supported by the first protrusion, and the first fastening member is connected with the first protrusion.

[0024] In the technical scheme, the frame is provided with the first protrusion, which is conducive to improving the connection strength between the heat exchange element and the frame while reducing the weight and material of the frame, thereby reducing the weight and cost of the battery device.

[0025] In some embodiments, the heat exchange element is provided with a second protrusion on the side thereof facing the frame in the first direction, the heat exchange element has a medium flow channel, the medium flow channel is located on the side of the second protrusion facing the battery module in the first direction, the first protrusion and the second protrusion are arranged in a third direction, the first protrusion and the second protrusion overlap in the third direction, and the first direction, the second direction and the third direction intersect with each other.

[0026] In the technical scheme, the medium flow channel can be used for the flow of heat exchange medium to exchange heat with the battery assembly, and by arranging the second protrusion on the heat exchange element and limiting the positions of the second protrusion and the first protrusion to the above structure, the space between the frame and the heat exchange element can be fully utilized, which is conducive to improving the compactness of the battery device.

[0027] In some embodiments, the heat exchange element includes a first heat exchange plate and a second heat exchange plate arranged in connection, the first heat exchange plate is closer to the battery module than the second heat exchange plate in the first direction, a part of the second heat exchange plate protrudes towards the frame to form a second protrusion, and the second protrusion and the first heat exchange plate form a medium flow channel therebetween.

[0028] In the technical scheme, the first heat exchange plate and the second heat exchange plate can be butt-jointed in the first direction to form the heat exchange element with the medium flow channel, which is convenient for processing and assembly.

[0029] In some embodiments, the heat exchange member has a heat exchange body and a positioning portion, the heat exchange body is arranged between the frame and the battery module, and the end plate, the heat exchange body and the frame are connected by the first fastening member, and the positioning portion is arranged around the battery module.

[0030] By arranging the heat exchange member in the above structure, the heat exchange member and the frame can be arranged more compactly, which is conducive to improving the tightness of the connection between the heat exchange member and the frame and improving the structural compactness of the battery device.

[0031] In some embodiments, the positioning portion abuts against the frame; and / or, the battery device further comprises a second fastening member, and the heat exchange member and the frame are connected by the second fastening member.

[0032] By arranging in the above manner, the connection strength between the heat exchange member and the frame can be enhanced to improve the reliability of the battery device.

[0033] In some embodiments, the frame comprises two first frame bodies and two second frame bodies, the two first frame bodies are arranged at intervals along a second direction, the two second frame bodies are arranged at intervals along a third direction, the first frame body and the second frame body are connected to form a ring-shaped structure, the end plate, the heat exchange member and the first frame body are fixedly connected by the first fastening member, and the first direction, the second direction and the third direction intersect with each other.

[0034] By arranging in the above manner, the structure of the frame can be simplified to reduce the weight and cost of the battery device.

[0035] In some embodiments, the battery device further comprises a reinforcing member, and the reinforcing member is connected to a side of the frame away from the heat exchange member along the first direction.

[0036] By arranging in the above manner, the structural strength of the frame can be enhanced, and the assembly between the reinforcing member and the frame is facilitated.

[0037] In some embodiments, the battery device further comprises a third fastening member, and the heat exchange member and the reinforcing member are connected by the third fastening member; and / or, a third protrusion is arranged on a side of the reinforcing member facing the heat exchange member along the first direction, and the heat exchange member is supported on the third protrusion.

[0038] By arranging in the above manner, the connection strength and structural compactness between the heat exchange member and the reinforcing member can be improved, thereby enhancing the connection strength between the heat exchange member and the frame, and further improving the structural strength of the battery device.

[0039] In a second aspect, the present application provides a battery device, comprising a plurality of battery devices according to any one of the embodiments of the first aspect, and the battery device is used for storing or providing electric energy.

[0040] In a third aspect, the present application provides an energy storage system, comprising a power conversion device and the energy storage device according to any one of the embodiments of the second aspect, wherein the power conversion device is configured to electrically connect the power generation device and the energy storage device.

[0041] In a fourth aspect, the present application provides a charging network, comprising a charging pile and the energy storage device according to any one of the embodiments of the second aspect or the energy storage system according to any one of the embodiments of the third aspect, wherein the energy storage device is configured to provide electric energy for the charging pile.

[0042] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the contents of the specification can be implemented, and in order to enable the above and other purposes, features and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the drawings.

[0044] Figure 1 Structure diagram of a charging network in some embodiments of the present application;

[0045] Figure 2 Structure diagram of an energy storage system in some embodiments of the present application;

[0046] Figure 3 Structure diagram of an energy storage device in some embodiments of the present application;

[0047] Figure 4 Explosion structure diagram of a battery cell provided in some embodiments of the present application;

[0048] Figure 5 Structure diagram of a battery assembly provided in some embodiments of the present application;

[0049] Figure 6 Partial structure diagram of a battery device provided in some embodiments of the present application;

[0050] Figure 7 Partial structure diagram of a battery device provided in some embodiments of the present application;

[0051] Figure 8 Partial sectional view of a battery device provided in some embodiments of the present application;

[0052] Figure 9A partial sectional view of a battery device provided for some embodiments of the present application;

[0053] Figure 10 A partial structural schematic view of a battery device provided for some other embodiments of the present application;

[0054] Figure 11 A partial structural schematic view of a battery device provided for some other embodiments of the present application.

[0055] Reference signs of the detailed description are as follows:

[0056] 1000, charging network; 2000, energy storage system; 3000, power generation device;

[0057] 200, energy storage device; 210, energy storage box; 300, charging pile; 400, energy storage converter;

[0058] 100, battery device;

[0059] 10, battery module; 4, battery assembly; 11, battery cell; 12, end plate; 101, third hole; 102, gap; 111, shell; 110, end cover; 120, housing; 112, electrode assembly; 113, electrode terminal; 114, pressure relief mechanism;

[0060] 20, frame; 201, cavity; 211, first wall; 212, second wall; 202, first hole; 203, first protrusion; 21, first frame body; 22, second frame body;

[0061] 30, heat exchange member; 31, first heat exchange plate; 32, second heat exchange plate; 301, second hole; 302, second protrusion; 303, medium flow channel; 310, heat exchange main body; 320, positioning portion;

[0062] 40, first fastening member; 41, first fastener; 411, main body portion; 412, first connecting portion; 413, second connecting portion; 42, second fastener;

[0063] 51, second fastening member; 52, reinforcing member; 501, third protrusion; 53, third fastening member;

[0064] X, first direction; Y, second direction; Z, third direction. Detailed description

[0065] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0067] In the present application, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments.

[0068] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0070] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0071] In this application, "multiple" means two or more (including two).

[0072] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of battery devices, the market demand is also constantly increasing.

[0073] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0074] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0075] The battery devices in related technologies have many components, which increases the processing and assembly costs of the battery devices. Based on the above technical problems, this application provides a battery device, including a frame, a heat exchanger and a battery module. The heat exchanger is disposed on one side of the frame along a first direction, and the battery module is disposed on the side of the heat exchanger away from the frame along the first direction. The battery module includes a battery assembly and an end plate. The battery assembly has end plates at both ends along a second direction. The first direction and the second direction intersect. The end plates, the heat exchanger and the frame are connected by a first fastening member.

[0076] The battery assembly can be placed between two end plates to form a battery module. By connecting the end plates, heat exchange components and frame through the first fastening member, the battery module can be directly fixed to the heat exchange components and frame. This helps to reduce the number of parts in the battery device, simplify the processing and manufacturing process, and reduce the assembly difficulty, thereby helping to reduce the material cost and assembly cost of the battery device.

[0077] The technical solutions described in the embodiments of this application are applicable to various energy storage devices such as energy storage containers or energy storage cabinets that use battery devices.

[0078] Please see Figure 1 , Figure 3 and Figure 4 , Figure 1 This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of this application. Figure 3 This is a schematic diagram of the structure of an energy storage device 200 provided in some embodiments of this application. Figure 4An exploded structural schematic diagram of a battery cell 11 is provided for some embodiments of the present application. Embodiments of the present application provide a charging network 1000, which includes a charging pile 300 for charging an electrical device. The charging network 1000 can also include an energy storage device 200, which is electrically connected to the charging pile 300, and the energy storage device 200 is configured to provide electrical energy to the charging pile 300.

[0079] It should be noted that the battery cell 11 in the energy storage device 200 is electrically connected to the charging pile 300 through a cable, and the battery cell 11 can provide the electrical energy stored therein to the charging pile 300. The charging pile 300 has a connector that can be connected to the electrical device, so as to charge the electrical device. The charging network 1000 applies the energy storage device 200, which can effectively improve the safety of the charging network 1000, and also helps to improve the flexibility of the charging network 1000 when deployed.

[0080] In one charging network 1000, the charging pile 300 can be one, and the energy storage device 200 provides electrical energy to the charging pile 300; the charging pile 300 can also be multiple, and the energy storage device 200 provides electrical energy to multiple charging piles 300.

[0081] As an example, as shown in Figure 1 , the charging network 1000 includes one energy storage device 200 and two charging piles 300, and one energy storage device 200 provides electrical energy to the two charging piles 300.

[0082] As shown in Figure 3 , the energy storage device 200 can include a battery device 100, which is electrically connected to the charging pile 300, so as to provide electrical energy to the charging pile 300.

[0083] Please refer to Figure 2 and Figure 3 , Figure 2 A structural schematic diagram of an energy storage system 2000 is provided for some embodiments of the present application. Embodiments of the present application provide an energy storage system 2000. The energy storage system 2000 includes an energy storage converter 400, which can be electrically connected to a power generation device 3000 to convert the electrical 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 converter 400, and the energy storage converter 400 converts the electrical energy provided by the power generation device 3000 and introduces it into the energy storage device 200 for storage.

[0084] The power conversion device is used to connect between the power generation device 3000 and the energy storage device 200. The power generation device 3000 is used to generate electric energy, and the power generation device 3000 is used to store the generated electric energy into the energy storage device 200 through the power conversion device. The energy storage system 2000 applies the energy storage device 200, which can effectively improve the operation safety of the energy storage system 2000. In specific implementation, the power generation equipment can be a solar panel, a hydroelectric power generation equipment, a thermal power generation equipment, etc. The specific type of the power generation equipment is not limited in the present application.

[0085] As shown in Figure 2 , the energy storage system 2000 includes an energy storage device 200 and an energy storage converter 400, and two power generation devices 3000 respectively transmit the generated electric energy to the energy storage converter 400, and the electric energy is introduced into the energy storage device 200 through the energy storage converter 400 for storage.

[0086] As shown in Figure 3 , the energy storage device 200 includes an energy storage box 210, and the energy storage box 210 is provided with a battery device 100.

[0087] As an example, the energy storage device 200 can be an energy storage container, an energy storage cabinet, etc.

[0088] As an example, the energy storage device 200 can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system or a temporary power supply system, etc. The energy storage power station can store electric energy during the low electricity consumption period, and provide electric energy for related users or electric equipment during the peak electricity consumption period. The wind power generator set of the wind power generation system collects wind energy and converts it into electric energy, which is stored by the energy storage device 200. The solar power generation system can convert solar energy into electric energy, which is stored by the energy storage device 200 and supplied to users in time. The mobile power system can supply power to related electric equipment in places where the power grid power supply system cannot reach, such as remote mountainous areas and remote wild areas. The temporary power supply system can supply power to users in the case of insufficient power supply.

[0089] Please continue to refer to Figure 4 , the battery monomer 11 includes a shell 111 and an electrode assembly 112.

[0090] As an example, the battery monomer 11 can be a cylindrical battery monomer, a prismatic battery monomer, a soft package battery monomer or other shaped battery monomers, and the prismatic battery monomer includes a square shell battery monomer, a blade-shaped battery monomer, a multi-prismatic battery, such as a hexagonal prism battery, etc.

[0091] The shell 111 is a component for forming an internal environment of the battery cell 11, and the internal environment formed thereby can be used to accommodate the electrode assembly 112, and can also be used to accommodate an electrolyte and other components. Optionally, the shell 111 can be made of, but is not limited to, a metal or a non-metal material. For example, the metal material can be copper, aluminum, stainless steel, or the like; and the non-metal material can be polyethylene, polypropylene, polyvinyl chloride, or the like.

[0092] For example, the shell 111 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, or the like.

[0093] In some embodiments, the shell 111 can be a sealed structure or a non-sealed structure. As an example, when the shell 111 is a non-sealed structure, the shell 111 serves to protect the electrode assembly 112, and a sealing bag is further included between the shell 111 and the electrode assembly 112, and the sealing bag is used to package the electrode assembly 112 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the shell 111 is a sealed structure, it is used to package the electrode assembly 112, the electrolyte, and other components.

[0094] In some embodiments, the shell 111 includes an end cover 110 and a shell body 120, and the shell body 120 is provided with a shell opening, and the end cover 110 is provided on the shell opening. The shell body 120 can be provided with one or more shell openings. The end cover 110 can also be provided with one or more.

[0095] The shape of the shell 111 can be determined according to the specific shape of the electrode assembly 112. For example, if the electrode assembly 112 is a cuboid structure, a cuboid shell can be selected; if the electrode assembly 112 is a cylindrical structure, a cylindrical shell can be selected.

[0096] The electrode assembly 112 is a component in which electrochemical reactions occur in the battery cell 11, and the shell 111 can contain one or more electrode assemblies 112.

[0097] In some embodiments, the shape of the electrode assembly 112 can be cylindrical, flat, or multi-prismatic, or the like.

[0098] The electrode assembly 112 can be a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0099] The electrode assembly 112 includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charging and discharging process of the battery cell 11, active ions (such as lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can prevent the positive and negative electrodes from short-circuiting, and can also allow the active ions to pass through.

[0100] For example, the electrode assembly 112 can be a wound structure, a stacked structure, or a hybrid structure of winding and stacking. Figure 4As shown, the battery cell 11 also includes electrode terminals 113.

[0101] The electrode terminal 113 may be provided on the housing 111. Optionally, the end cover 110 may be provided with the electrode terminal 113, or the housing 120 may be provided with the electrode terminal 113, or both the end cover 110 and the housing 120 may be provided with the electrode terminal 113.

[0102] In some embodiments, at least one electrode terminal 113 is provided on the housing 111, and the electrode terminal 113 is electrically connected to the tab of the electrode assembly 112. The electrode terminal 113 can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector.

[0103] Electrode terminal 113 can be electrically connected to electrode assembly 112 for outputting or inputting electrical energy from a single battery cell. Electrode terminal 113 can be electrically connected to electrode assembly 112 by connecting to tabs. The tabs electrically connected to electrode terminal 113 can be either positive or negative tabs.

[0104] like Figure 4 As shown, the battery cell 11 also includes a pressure relief mechanism 114, which is used to release the internal gas of the battery cell 11. The pressure relief mechanism 114 can be located on the outer casing 111. Optionally, the pressure relief mechanism 114 can be located on the end cap 110, or on the housing 120, or both the end cap 110 and the housing 120 can each have a pressure relief mechanism 114.

[0105] As an example, the internal pressure or temperature of the battery cell 11 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 11 reaches the predetermined threshold, the pressure relief mechanism 114 is activated or a weak structure provided in the pressure relief mechanism 114 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 11.

[0106] As an example, the pressure relief mechanism 114 can be integrally formed with the housing 111.

[0107] As an example, the pressure relief mechanism 114 can also be separately configured and connected to the housing 111.

[0108] The term "actuation" as used in this application refers to the pressure relief mechanism 114 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 11. The actions of the pressure relief mechanism 114 may include, but are not limited to: movement of components within the pressure relief mechanism 114 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 114, etc. When the pressure relief mechanism 114 is actuated, the high-temperature, high-pressure substances inside the battery cell 11 are discharged outwards from the actuated portion as waste. This method enables pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0109] The emissions from the battery cell 11 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0110] Please refer to the following: Figures 5 to 9 According to an embodiment of this application, a battery device 100 is provided, including a frame 20, a heat exchanger 30, a battery module 10, and a first fastening member 40. The heat exchanger 30 is disposed on one side of the frame 20 along the first direction X, and the battery module 10 is disposed on the side of the heat exchanger 30 away from the frame 20 along the first direction X. The battery module 10 includes a battery assembly 4 and an end plate 12. The battery assembly 4 has end plates 12 at both ends along the second direction Y. The first direction X intersects the second direction Y. The end plates 12, the heat exchanger 30, and the frame 20 are connected by the first fastening member 40.

[0111] In this embodiment of the application, the first direction X can be the direction of gravity, that is, the height direction of the battery device 100, the second direction Y can be the length direction of the battery device 100, and the third direction Z can be the width direction of the battery device 100. Alternatively, the second direction Y can be the width direction of the battery device 100, and the third direction Z can be the length direction of the battery device 100.

[0112] As an example, the first direction X is the height direction of the battery device 100, the second direction Y is the length direction of the battery device 100, and the third direction Z is the width direction of the battery device 100.

[0113] The battery assembly 4 includes at least one battery cell 11.

[0114] The frame 20 serves to support and fix the heat exchanger 30 and the battery module 10, forming the structural foundation of the entire battery device 100. The frame 20 refers to a structure using profile frames as load-bearing components, such as a grid-shaped frame, a sun-shaped frame, or a square-shaped frame. This facilitates stress distribution, reduces material usage, and lowers weight, thus achieving a lightweight design.

[0115] The heat exchange member 30 is used for heat exchange with the battery assembly 4, specifically, the heat exchange member 30 is used for heat exchange with the battery cell 11 in the battery assembly 4, that is, heat can be transferred between the heat exchange member 30 and the battery cell 11, so that the battery cell 11 can work in a suitable temperature environment, prolong the service life of the battery device 100 and improve its performance. The heat exchange member 30 is located between the battery module 10 and the frame 20, so that the heat exchange member 30 can not only exchange heat with the battery cell 11, but also support the battery module 10, thereby enhancing the support and protection effect of the battery cell 11.

[0116] The battery module 10 includes the battery assembly 4 and two end plates 12, one of which is arranged at one end of the battery assembly 4 along the first direction X, and the other of which is arranged at the other end of the battery assembly 4 along the first direction X. The two end plates 12 not only can fix and protect the battery assembly 4, but also can constrain the expansion force of the battery assembly 4 in the second direction Y, so as to improve the reliability of the battery cell 11 in the battery assembly 4, and further improve the reliability of the battery device 100.

[0117] As shown in Figure 4 and Figure 5 The battery module 10 in the battery device 100 according to the embodiments of the present application can include one or more battery assemblies 4 for providing voltage and capacity. The battery assembly 4 can include one or more battery cells 11, and the plurality of battery cells 11 are connected in series, parallel or mixed connection through the busbar component.

[0118] As an example, the battery assembly 4 can be arranged and fixed by a plurality of battery cells 11 to form an independent module.

[0119] The first fastening member 40 can be a bolt, a nut, a buckle, a peg and the like, which is used to firmly connect the end plate 12, the heat exchange member 30 and the frame 20 together, thereby improving the structural stability of the battery device 100.

[0120] The battery device in the related art includes a plurality of connecting beam structures, so that the battery module is fixed with the connecting beam through resistance spot welding or fasteners, and the heat exchange member is fixed with the connecting beam and the frame through resistance spot welding or fasteners, so as to realize the installation and fixation of the battery cell and the heat exchange member and the frame. This not only occupies the internal space of the battery device, but also makes the assembly process more complicated.

[0121] In the embodiments of the present application, the end plate 12, the heat exchange member 30 and the frame 20 can be connected through the first fastening member 40, so that the battery module 10 can be directly fixed with the heat exchange member 30 and the frame 20, which is conducive to reducing the number of parts of the battery device 100, simplifying the processing and manufacturing process, and reducing the assembly difficulty, thereby being conducive to reducing the material cost and assembly cost of the battery device 100. At the same time, the internal space of the battery device 100 can be optimized to improve the space utilization rate of the battery device 100.

[0122] In addition, the end plate 12 in the battery module 10 can be directly fixed with the heat exchange member 30 and the frame 20 through the first fastening member 40, and the heat exchange member 30 can be arranged closer to the battery monomer 11, so that the structure of the battery device 100 is more compact.

[0123] Optionally, the heat exchange member 30 can include but is not limited to any one of a liquid cooling plate, an air cooling plate, a semiconductor refrigeration sheet, a liquid cooling pipe and an air cooling pipe.

[0124] Optionally, the frame 20 can be formed by sheet metal process, cold stamping process, extrusion process or die casting.

[0125] Optionally, the battery module 10 can further include a binding belt or other limiting structure to surround the battery assembly 4 and the end plate 12 and fix them as a whole, which can better improve the limiting effect of the battery assembly 4 and better improve the reliability of the battery device 100.

[0126] The battery module 10 can include one battery assembly 4, and can also include a plurality of battery assemblies 4. Optionally, the number of battery assemblies 4 can be set to one, and one battery assembly 4 is arranged between the two end plates 12 to facilitate processing and assembly. Optionally, the number of battery assemblies 4 can also be set to a plurality, and a plurality of battery assemblies 4 arranged along the third direction Z are arranged between the two end plates 12, which is conducive to improving the energy density of the battery device 100.

[0127] The battery assembly 4 can include one battery monomer 11, and can also include a plurality of battery monomers 11. When the battery assembly 4 includes a plurality of battery monomers 11, the plurality of battery monomers 11 are arranged along the second direction Y.

[0128] Optionally, the number of battery modules 10 can be one, and can also be set to a plurality. For example, as shown in Figure 6 The number of battery modules 10 is a plurality, and the plurality of battery modules 10 are arranged along the third direction Z, which is conducive to facilitating processing and assembly and improving the energy density of the battery device 100.

[0129] As shown in Figure 6As shown, in some embodiments, the battery module 10 has a dimension along the second direction Y that is greater than a dimension along the third direction Z, and therefore, by arranging two end plates 12 at the two ends of the battery cells 11 along the second direction Y, the size of the end plates 12 can be reduced, thereby reducing the cost and weight of the battery device 100.

[0130] Further, in some embodiments, the frame 20 has a dimension along the second direction Y that is greater than a dimension along the third direction Z, and / or the heat exchange member 30 has a dimension along the second direction Y that is greater than a dimension along the third direction Z.

[0131] Optionally, the heat exchange member 30 can be in direct contact with the battery assembly 4 to achieve contact heat exchange, or a heat-conducting adhesive or other component can be arranged between the heat exchange member 30 and the battery assembly 4 for heat exchange.

[0132] Optionally, the heat exchange member 30 can be arranged in a plate structure, or in a bent pipe structure.

[0133] In some embodiments, the battery device 100 provided by the embodiments of the present application can further include a top plate arranged on a side of the battery module 10 away from the frame 20 along the first direction X, and a side plate connected between the top plate and the frame 20, and the top plate, the side plate, and the frame 20 can enclose a receiving cavity for receiving the battery module 10 and the heat exchange member 30. In other embodiments, the battery device 100 provided by the embodiments of the present application can only include the frame 20, and the frame 20 and the heat exchange member 30 can be regarded as a bearing structure in the battery device 100 to be directly integrated into an energy storage device or other equipment using the battery device 100.

[0134] In some embodiments, the first fastening member 40 is arranged in a plurality of numbers, and the plurality of first fastening members 40 are spaced apart along the third direction Z.

[0135] In some embodiments, the first fastening member 40 is arranged through the end plate 12 and the heat exchange member 30 along the first direction X and is fixedly connected with the frame 20.

[0136] When the battery device 100 is assembled, the end plate 12 and the heat exchange member 30 can be connected through the first fastening member 40, and then the whole after the connection of the two can be connected with the frame 20 through the first fastening member 40, wherein the first fastening member 40 can be fixed with the frame 20 by welding, soldering, riveting, or detachable connection. The first fastening member 40 can be connected with the surface of the frame 20, or can be arranged in the frame 20 to be connected therewith.

[0137] The battery device 100 provided by some embodiments of the present application can connect the battery module 10, the heat exchange member 30, and the frame 20 into one body through the above-mentioned manner, thereby reducing the cost of the battery device 100.

[0138] The first fastening member 40 can be composed of multiple sub-components, that is, the first fastening member 40 can be assembled into a whole by multiple sub-components, for example, the first fastening member 40 can include a first sub-component for connecting the heat exchange member 30 and the frame 20, and a second sub-component for connecting the end plate 12 and the first sub-component, so that the first sub-component and the second sub-component are connected as a whole, and the end plate 12, the heat exchange member 30 and the frame 20 can be connected by the first fastening member 40.

[0139] Alternatively, the first fastening member 40 can also be composed of multiple independent sub-components, for example, the first fastening member 40 can include a third sub-component for connecting the heat exchange member 30 and the frame 20, and a fourth sub-component for connecting the end plate 12 and the heat exchange member 30, so that the end plate 12, the heat exchange member 30 and the frame 20 can be connected by the first fastening member 40.

[0140] In some embodiments, the first fastening member 40 is arranged in the frame 20 and fixedly connected with the frame 20.

[0141] The first fastening member 40 can be arranged in the frame 20 to be connected therewith, which is conducive to improving the connection strength between the two, so that the battery module 10, the heat exchange member 30 and the frame 20 can be more firmly connected by the first fastening member 40, and the first fastening member 40 and the frame 20 can be arranged more closely to improve the structural compactness of the battery device 100.

[0142] Optionally, the first fastening member 40 is arranged in the end plate 12 and the heat exchange member 30 along the first direction X and arranged in the frame 20 to be fixedly connected with the frame 20.

[0143] Optionally, the frame 20 can be a solid structure, or the frame 20 can also be arranged as a hollow structure with a cavity.

[0144] Please refer to Figure 8 and Figure 9 In some embodiments, the frame 20 has a cavity 201 and has a first wall 211 and a second wall 212 arranged on both sides of the cavity 201 along the first direction X, the first wall 211 is closer to the heat exchange member 30 relative to the second wall 212, the first wall 211 is provided with a first hole 202, and the first fastening member 40 is arranged in the first hole 202 and in the cavity 201.

[0145] The first fastening member 40 can be arranged in the cavity 201 from the first hole 202 of the first wall 211, and the first fastening member 40 can be connected with the first wall 211 and also connected with the second wall 212.

[0146] The battery device 100 provided by some embodiments of the present application has the frame 20 arranged in a structure with the cavity 201, which is conducive to reducing the weight of the frame 20 and thus conducive to achieving the lightweight design of the battery device 100.

[0147] Optionally, the second wall 212 is a plane away from the side surface of the first wall 211 along the first direction X, so that the battery device 100 is more beautiful and flat, and thus convenient for transportation and assembly.

[0148] In some embodiments, the first fastening member 40 can be connected to the outer surface of the end plate 12 and the outer surface of the heat exchange member 30 and extend into the cavity 201 through the first hole 202 of the first wall 211 to connect the end plate 12, the heat exchange member 30 and the frame 20.

[0149] In some embodiments, the heat exchange member 30 is provided with a second hole 301, the first fastening member 40 can be connected to the outer surface of the end plate 12 and extend into the cavity 201 through the second hole 301 of the heat exchange member 30 and the first hole 202 of the first wall 211 to connect the end plate 12, the heat exchange member 30 and the frame 20.

[0150] In some embodiments, the end plate 12 is provided with a third hole 101, the first fastening member 40 passes through the third hole 101 of the end plate 12 and is connected to the outer surface of the heat exchange member 30 and the outer surface of the frame 20 to connect the end plate 12, the heat exchange member 30 and the frame 20.

[0151] Please continue to refer to Figure 8 and Figure 9 In some embodiments, the heat exchange member 30 is provided with a second hole 301, the end plate 12 is provided with a third hole 101, the first hole 202, the second hole 301 and the third hole 101 are communicated along the first direction X, and the first fastening member 40 passes through the first hole 202, the second hole 301 and the third hole 101.

[0152] The first fastening member 40 can pass through the first hole 202, the second hole 301 and the third hole 101 along the first direction X to fix the end plate 12, the heat exchange member 30 and the frame 20 as a whole, so as to realize the close cooperation between the end plate 12, the heat exchange member 30 and the frame 20.

[0153] The battery device 100 provided by some embodiments of the present application has the first fastening member 40 capable of connecting the battery module 10, the heat exchange member 30 and the frame 20 as a whole in the above manner, so as to reduce the cost of the battery device 100 and also conducive to reducing the stress concentration problem in the connection process, thereby conducive to improving the service life of the battery device 100.

[0154] In some embodiments, the first hole 202, the second hole 301 and the third hole 101 all extend along the first direction X.

[0155] In the above technical solution, the first fastening member 40 can be arranged in the first hole 202, the second hole 301 and the third hole 101 in the first direction X, facilitating the processing and assembly of the battery device 100, and facilitating the processing of the first hole 202, the second hole 301 and the third hole 101, and the positioning between the end plate 12, the heat exchange member 30 and the frame 20.

[0156] Optionally, the first hole 202, the second hole 301 and the third hole 101 are coaxially arranged in the first direction X.

[0157] Please continue to refer to Figure 8 and Figure 9 In some embodiments, the first fastening member 40 includes a first fastener 41 and a second fastener 42, the first fastener 41 is arranged in the second hole 301 and the first hole 202 to connect the heat exchange member 30 and the frame 20, and the second fastener 42 is arranged in the third hole 101 and connected with the first fastener 41.

[0158] When the battery device 100 is assembled, the first fastening member 40 can be arranged in the first hole 202 and the second hole 301 first, so that the heat exchange member 30 and the first wall 211 are fixedly connected, so that the heat exchange member 30 is fixed on the frame 20, and then the second fastener 42 is arranged in the third hole 101 and connected with the first fastener 41, so that the end plate 12 is fixed with the heat exchange member 30 and the frame 20, thereby realizing the locking of the battery module 10, the heat exchange member 30 and the frame 20.

[0159] The battery device 100 provided by some embodiments of the present application facilitates processing and assembly by dividing the first fastening member 40 into two parts, thereby reducing the assembly difficulty.

[0160] In some embodiments, the second fastener 42 is threadedly connected with the first fastener 41.

[0161] The first fastener 41 can be a cylindrical body or a ring structure, the inner wall surface of the first fastener 41 can be provided with a first thread, and the outer wall surface of the second fastener 42 can be provided with a second thread matched with the first thread, when the second fastener 42 is arranged in the end plate 12 to extend into the first fastener 41, the second fastener 42 is screwed to be threadedly connected with the first fastener 41.

[0162] The battery device 100 provided by some embodiments of the present application can be fixed by threadedly connecting the first fastener 41 and the second fastener 42, which facilitates assembly, is conducive to improving assembly efficiency, has high tensile strength, and has stronger stability.

[0163] Optionally, the second fastener 42 can also be in interference fit with the first fastener 41, or both of them can be connected and fixed by snap connection or the like.

[0164] Please refer to Figure 8 and Figure 9 In some embodiments, the first fastener 41 comprises a main body part 411, a first connecting part 412 and a second connecting part 413. The main body part 411 is arranged through the second hole 301 and the first hole 202, and the second fastener 42 is connected with the main body part 411. The first connecting part 412 is connected to one end of the main body part 411 close to the heat exchange element 30 along the first direction X and is arranged around the main body part 411. The second connecting part 413 is connected to the circumferential side of the main body part 411 and is arranged around the main body part 411. The second connecting part 413 is arranged in the cavity 201. The heat exchange element 30 and the first wall 211 abut between the first connecting part 412 and the second connecting part 413. The first connecting part 412 abuts between the heat exchange element 30 and the end plate 12.

[0165] The first connecting part 412 and the first connecting part 412 are spaced apart along the first direction X, and the first connecting part 412 is close to the heat exchange element 30 relative to the second connecting part 413. Along the first direction X, the end plate 12, the first connecting part 412, the heat exchange element 30, the first wall 211, the second connecting part 413 and the second wall 212 are arranged in sequence.

[0166] The main body part 411 is used to connect the heat exchange element 30, the first wall 211 and the second fastener 42. The first connecting part 412 is used to position and limit the second fastener 42, so as to reduce the possibility of deviation or shaking of the second fastener 42 during connection, which is beneficial to improve the connection efficiency and the reliability of the battery device 100. In addition, the first connecting part 412 can also cooperate with the first connecting part 412 to fasten the heat exchange element 30 and the first wall 211 therebetween.

[0167] In addition, the first connecting part 412 is located between the end plate 12 and the heat exchange element 30, which can also play a certain supporting role, so as to reduce the possibility of hard friction between the end plate 12 and the heat exchange element 30 during assembly of the first fastener 41, thereby being beneficial to improve the service life of the two, and further being beneficial to improve the service life of the battery device 100.

[0168] The battery device 100 provided by some embodiments of the present application is provided with the first connecting portion 412 and the second connecting portion 413 surrounding the main body portion 411, so that the heat exchange member 30 and the first wall 211 can abut between the first connecting portion 412 and the second connecting portion 413. The first connecting portion 412 and the second connecting portion 413 can provide clamping force for the heat exchange member 30 and the first wall 211, so that the two are more tightly connected together, which can reduce the possibility of the heat exchange member 30 and the first wall 211 being separated. Meanwhile, the second fastener 42 is connected to the main body portion 411, so that the end plate 12, the heat exchange member 30 and the first wall 211 are fixed, and then the battery module 10, the heat exchange member 30 and the frame 20 are fixed, which is beneficial to enhance the stability of the connection among the three.

[0169] In the specific assembly process, the first fastener 41 can be fixed to the heat exchange member 30 and the first wall 211 by using a mounting tool acting on the main body portion 411. The first connecting portion 412 and the second connecting portion 413 can be provided in a ring shape or other shapes capable of surrounding the second fastener 42. The second fastener 42 can be provided in a shape suitable for the main body portion 411, so as to be reliably connected to the main body portion 411.

[0170] In some embodiments, the first fastener 41 can be a pull rivet nut, and the second fastener 42 can be a bolt. The pull rivet nut is used to fix the heat exchange member 30 and the frame 20, and then the bolt is inserted into the end plate 12 and screwed on the pull rivet nut, so as to fix the end plate 12, the heat exchange member 30 and the frame 20 as a whole.

[0171] As shown in FIG. 1, Figure 8 In some embodiments, in the first direction X, the end plate 12 and the heat exchange member 30 have a gap 102 therebetween.

[0172] That is, except for the position where the first connecting portion 412 is arranged, the end plate 12 and the heat exchange member 30 are gap-fitted at other positions. By this arrangement, the area of the first connecting portion 412 can be reduced, so as to reduce the weight and material cost of the battery device 100, and also reduce the possibility of friction between the end plate 12 and the heat exchange member 30, so as to improve the service life of the battery device 100.

[0173] In some embodiments, the battery assembly 4 protrudes from the side surface of the end plate 12 along the first direction X toward the side surface of the heat exchange member 30.

[0174] Since the first connecting portion 412 is arranged between the end plate 12 and the heat exchange member 30, by the above arrangement, the battery assembly 4 can be arranged closer to the heat exchange member 30, so as to reduce the heat transfer path, which is beneficial to improve the heat exchange efficiency of the heat exchange member 30 on the battery assembly 4, thereby being beneficial to improve the performance of the battery device 100.

[0175] In some embodiments, the battery assembly 4 is supported by the heat exchange member 30.

[0176] In this way, the heat exchange efficiency between the battery assembly 4 and the heat exchange member 30 is improved, and the heat exchange member 30 provides support for the battery assembly 4, reducing the possibility of the battery assembly 4 shaking or displacing, thereby improving the reliability of the battery device 100.

[0177] As shown in FIG. 1, in some embodiments, the frame 20 is provided with a first protruding portion 203 on the side facing the heat exchange member 30 along the first direction X, the heat exchange member 30 is supported by the first protruding portion 203, and the first fastening member 40 is connected to the first protruding portion 203. Figure 9

[0178] The first protruding portion 203 can be understood as a surface of the frame 20 on the side facing the heat exchange member 30 along the first direction X, which has a region protruding towards the heat exchange member 30, so that the frame 20 has a larger size along the first direction X in this region than in other positions.

[0179] By connecting the first fastening member 40 to the first protruding portion 203, the first protruding portion 203 can provide more installation space, which is conducive to enhancing the connection stability between the frame 20 and the first fastening member 40, thereby further improving the overall structural stability of the battery device 100, while also reducing the weight and material of the frame 20, thereby facilitating the reduction of the weight and cost of the electrical device.

[0180] Optionally, the first protruding portion 203 can be one or multiple, as an example, the number of the first protruding portion 203 is related to the number of the first fastening member 40.

[0181] Optionally, the first protruding portion 203 is provided with a third hole 101.

[0182] Optionally, some surfaces of the first wall 211 on the side facing the cavity 201 along the first direction X are recessed to the other side surface to form the first protruding portion 203 on the other side, which is convenient for operation and can also enhance the strength of the first wall 211.

[0183] As shown in FIG. 1, in some embodiments, the frame 20 is provided with a first protruding portion 203 on the side facing the heat exchange member 30 along the first direction X, the heat exchange member 30 is supported by the first protruding portion 203, and the first fastening member 40 is connected to the first protruding portion 203. Figure 9 ​As shown, in some embodiments, the heat exchange member 30 is provided with a second protrusion 302 on the side of the heat exchange member 30 facing the frame 20 along the first direction X, and the heat exchange member 30 has a medium flow channel 303 located on the side of the second protrusion 302 facing the battery module 10 along the first direction X, the first protrusion 203 and the second protrusion 302 are arranged along the third direction Z, the orthogonal projection of the first protrusion 203 along the third direction Z overlaps the orthogonal projection of the second protrusion 302 along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect with each other.

[0184] The medium flow channel 303 is configured to flow a heat exchange medium, and the heat exchange medium can flow in the medium flow channel 303 to exchange heat with the battery monomer 11. The heat exchange medium can have various forms, for example, the heat exchange medium can include water, air, phase change material, etc.

[0185] The second protrusion 302 can be understood as a surface of the heat exchange member 30 facing the frame 20 along the first direction X, which has a region protruding towards the frame 20, so that the size of the heat exchange member 30 along the first direction X in this region is greater than the size of the heat exchange member 30 along the first direction X at other positions.

[0186] The arrangement of the first protrusion 203 and the second protrusion 302 along the third direction Z and the overlapping design along the third direction Z not only enhance the structural connection between the frame 20 and the heat exchange member 30, but also optimize the overall heat transfer path, so that the heat management performance of the battery device 100 is significantly improved.

[0187] By providing the second protrusion 302 on the heat exchange member 30 and limiting the positions of the second protrusion 302 and the first protrusion 203 to the above structure, the space between the frame 20 and the heat exchange member 30 can be fully utilized, which is conducive to improving the compactness of the battery device 100.

[0188] Optionally, the second protrusion 302 can be provided as one or multiple, for example, the number of the second protrusion 302 is related to the number of the battery module 10.

[0189] Optionally, the second protrusion 302 is provided as multiple, and the multiple second protrusions 302 can be provided in communication with the multiple medium flow channels 303 on the side of the battery module 10 along the first direction X, or the multiple medium flow channels 303 can be provided independently.

[0190] Optionally, the multiple second protrusions 302 are distributed along the third direction Z, and the multiple first protrusions 203 are distributed along the third direction Z, and the first protrusion 203 and the second protrusion 302 are alternately distributed along the third direction Z.

[0191] Please refer to Figure 9In some embodiments, the heat exchange member 30 comprises a first heat exchange plate 31 and a second heat exchange plate 32 connected and arranged, the first heat exchange plate 31 is closer to the battery module 10 relative to the second heat exchange plate 32 along the first direction X, and a part of the second heat exchange plate 32 protrudes towards the frame 20 to form a second protruding portion 302, and a medium flow channel 303 is formed between the second protruding portion 302 and the first heat exchange plate 31.

[0192] The heat exchange member 30 is formed by butting the first heat exchange plate 31 and the second heat exchange plate 32, and the medium flow channel 303 is a flow channel for the cooling liquid to flow, which is formed between the second protruding portion 302 of the second heat exchange plate 32 and the first heat exchange plate 31. The second hole 301 comprises a first sub-hole arranged on the first heat exchange plate 31 and a second sub-hole arranged on the second heat exchange plate 32, and the first sub-hole and the second sub-hole are communicated along the first direction X.

[0193] The battery device 100 provided by some embodiments of the present application adopts the structure design that the first heat exchange plate 31 and the second heat exchange plate 32 are butted to form the heat exchange member 30 with the medium flow channel 303, which is more conducive to the processing of the medium channel, can simplify the process of processing and manufacturing the heat exchange member 30, and reduce the manufacturing cost.

[0194] The first heat exchange plate 31 and the second heat exchange plate 32 can be butted in a detachable connection or fixed connection manner, as long as the sealing requirement of the medium flow channel 303 formed inside can be met, for example, the butting can be realized in a welding, riveting or fastener connection manner, and it can be understood that a corresponding sealing member can be arranged at the butting position to further meet the sealing requirement.

[0195] In some examples, the second protruding portion 302 can be a protruding portion structure formed after the second heat exchange plate 32 is punched. The second heat exchange plate 32 is recessed from one side surface to the other side surface along the first direction X towards the first heat exchange plate 31, so as to form the second protruding portion 302 on the other side, which is convenient for operation and can also enhance the strength of the second heat exchange plate 32.

[0196] Please refer to Figure 7 and Figure 8 In some embodiments, the heat exchange member 30 has a heat exchange body 310 and a positioning portion 320, the heat exchange body 310 is arranged between the frame 20 and the battery module 10, and the end plate 12, the heat exchange body 310 and the frame 20 are connected by the first fastening member 40, and the positioning portion 320 is arranged around the battery module 10.

[0197] The positioning portion 320 is connected to the circumferential side of the heat exchange main body 310, and the side surface of the heat exchange main body 310 facing the battery module 10 is recessed from the side surface of the positioning portion 320 facing the battery module 10 along the first direction X, and the side surface of the heat exchange main body 310 facing the frame 20 is protruded from the side surface of the positioning portion 320 facing the battery module 10. The heat exchange main body 310 is arranged between the frame 20 and the battery module 10, and the end plate 12, the heat exchange main body 310 and the frame 20 are connected by the first fastening member 40, and the positioning portion 320 is arranged around the battery module 10.

[0198] It can be understood that the frame 20 is a structure with a communication space, that is, the frame 20 has an opening communicating with the communication space on any side along the first direction X. By the above arrangement, the heat exchange main body 310 can be extended into the communication space through the opening on one side of the frame 20 along the first direction X, which is conducive to making the design of the heat exchange member 30 and the frame 20 more compact, and also improves the connection strength between them, so that the whole after connection can better provide support and protection for the battery module 10, thereby improving the reliability of the battery device 100.

[0199] Optionally, the positioning portion 320 can be supported or abutted on the frame 20, or the positioning portion 320 can also be connected and arranged with the frame 20 through bolts, screws or the like.

[0200] By arranging the heat exchange member 30 as the above structure, the heat exchange member 30 and the frame 20 can be arranged more compactly, which is conducive to improving the compactness of the connection between them, and also conducive to improving the structural compactness of the battery device 100.

[0201] In some embodiments, the positioning portion 320 abuts the frame 20.

[0202] By arranging in the above manner, the positioning portion 320 and the frame 20 can be arranged more compactly, which is conducive to improving the structural compactness of the battery device 100.

[0203] As shown in Figure 8 and Figure 9 , the heat exchange member 30 has two regions of the heat exchange main body 310 and the positioning portion 320, and includes two structures of the first heat exchange plate 31 and the second heat exchange plate 32. After the first heat exchange plate 31 and the second heat exchange plate 32 are butted, all of the second heat exchange plate 32 is located in the region of the heat exchange main body 310, and part of the first heat exchange plate 31 is located in the region of the heat exchange main body 310, and the other part is located in the region of the positioning portion 320.

[0204] Please refer to Figure 8 , Figure 10 and Figure 11In some embodiments, the frame 20 comprises two first frames 21 and two second frames 22, the two first frames 21 are spaced apart along the second direction Y, the two second frames 22 are spaced apart along the third direction Z, the first frame 21 and the second frame 22 are connected to form a ring structure, the end plate 12, the heat exchange member 30 and the first frame 21 are fixedly connected through the first fastening member 40, and the first direction X, the second direction Y and the third direction Z intersect with each other.

[0205] In some embodiments, the first frame 21 can be a profile structure extending along the third direction Z, and the second frame 22 can be a profile structure extending along the second direction Y.

[0206] In some embodiments, the frame 20 is in a mouth-shaped structure, which can simplify the number of parts, simplify the structure and production process of the frame 20, reduce the weight and cost of the battery device 100, and reduce stress concentration due to the simplification of the structure of the frame 20, thereby improving the performance of the battery device 100 in resisting the expansion force of the battery monomer 11 in the battery assembly 4.

[0207] Optionally, the frame 20 can be an integrally formed structure. By integrally arranging the first frame 21 and the second frame 22, the assembly process of the two can be saved, and the connection strength between the two can be improved to enhance the structural strength of the frame 20, so that the frame 20 can have better support effect, which is beneficial to improve the service life and reliability of the battery device 100.

[0208] Optionally, the first frame 21 and the second frame 22 can also be provided separately and connected to assemble the frame 20. By this way, the processing and manufacturing are facilitated, and the flexibility of processing and use is improved.

[0209] Optionally, the size of the first frame 21 in the third direction Z is smaller than the size of the second frame 22 in the second direction Y, which can effectively reduce the size of the end plate 12 connected with the first frame 21, thereby facilitating the reduction of the weight and cost of the battery device 100.

[0210] In some embodiments, the heat exchange member 30 is arranged on one side of the frame 20 along the first direction X, and the heat exchange member 30 is connected with the first frame 21 on both sides along the second direction Y through the first fastening member 40. Optionally, the heat exchange member 30 can be detachably connected with the second frame 20 on both sides along the third direction Z, or the heat exchange member 30 can be supported on the second frame 20 along the third direction Z.

[0211] In some embodiments, the first frame 21 is connected with the heat exchange main body 310 of the heat exchange member 30, that is, the end plate 12, the heat exchange main body 310 and the first frame 21 are fixedly connected through the first fastening member 40, and the second frame 22 is connected with the positioning part 320 of the heat exchange member 30.

[0212] Please refer to Figure 7 、 Figure 8 and Figure 10 In some embodiments, the battery device 100 further comprises a second fastening member 51, and the heat exchange member 30 and the second frame body 22 are connected through the second fastening member 51.

[0213] Specifically, the positioning portion 320 of the heat exchange member 30 is connected with the second frame body 22 through the second fastening member 51.

[0214] The second fastening member 51 can include, but is not limited to, a bolt, a pull rivet nut, a stud, a peg, and the like.

[0215] In the above manner, the connection area between the heat exchange member 30 and the frame 20 can be increased to enhance the connection strength between the heat exchange member 30 and the frame 20, so that they can provide better support and protection for the battery module 10, thereby facilitating to improve the reliability of the battery device 100.

[0216] Please refer to Figure 11 In some embodiments, the battery device 100 further comprises a reinforcing member 52, and the reinforcing member 52 is connected to the side of the frame 20 away from the heat exchange member 30 along the first direction X.

[0217] Since the frame 20 is a frame structure, by additionally arranging the reinforcing member 52 connected with the frame 20, the structural strength of the frame 20 can be enhanced, and by connecting the reinforcing member 52 to the side of the frame 20 away from the heat exchange member 30 along the first direction X, the assembly space is large, facilitating the assembly and connection between the two, and also reducing the possibility of interference between the reinforcing member 52 and the heat exchange member 30.

[0218] Optionally, the reinforcing member 52 can be a rod body or a profile structure with a cavity, or can also be a plate or other structure.

[0219] Optionally, the number of reinforcing members 52 can be one, or can also be two or even more.

[0220] Optionally, the plurality of reinforcing members 52 can be spaced apart along the second direction Y, and the two ends of each reinforcing member 52 along the third direction Z can be respectively connected with the second frame body 22, or the plurality of reinforcing members 52 can be spaced apart along the third direction Z, and the two ends of each reinforcing member 52 along the second direction Y can be respectively connected with the first frame body 21.

[0221] Optionally, the heat exchange member 30 and the reinforcing member 52 can be spaced apart along the first direction X, or the heat exchange member 30 can also partially support or abut the reinforcing member 52, or the heat exchange member 30 can also be detachably connected with the reinforcing member 52.

[0222] Referring to Figure 10 In some embodiments, the battery device 100 further comprises a third fastening member 53, the heat exchange member 30 and the reinforcing member 52 are connected through the third fastening member 53.

[0223] The third fastening member 53 can include, but is not limited to, a bolt, a rivet nut, a stud, a peg, and the like. Specifically, the heat exchange body 310 of the heat exchange member 30 and the reinforcing member 52 are connected through the third fastening member 53.

[0224] By further connecting the heat exchange member 30 with the reinforcing member 52, the connection strength between the two can be improved, and the structural strength of the whole of the heat exchange member 30, the frame 20, and the reinforcing member 52 can be enhanced, so that better support and protection can be provided for the battery module 10, thereby facilitating the improvement of the structural strength of the battery device 100.

[0225] Referring to Figure 10 and Figure 11 In some embodiments, the reinforcing member 52 is provided with a third protruding portion 501 on the side facing the heat exchange member 30 along the first direction X, and the heat exchange member 30 is supported on the third protruding portion 501.

[0226] The third protruding portion 501 can be understood as a surface on the side of the reinforcing member 52 facing the heat exchange member 30 along the first direction X, having a region protruding towards the heat exchange member 30, so that the dimension of the third protruding portion 501 along the first direction X in this region is greater than the dimension of the third protruding portion 501 along the first direction X at other positions.

[0227] By the above arrangement, the support of the reinforcing member 52 on the heat exchange member 30 can be improved, the service life of the heat exchange member 30 can be prolonged, and the design of the heat exchange member 30 and the reinforcing member 52 can be more compact, so that the whole after the connection of the heat exchange member 30, the frame 20, and the reinforcing member 52 is more compact, thereby reducing the occupied area, and further facilitating the improvement of the space utilization of the battery device 100.

[0228] Optionally, the heat exchange member 30 is supported on the third protruding portion 501, and the heat exchange member 30 and the third protruding portion 501 are connected through the third fastening member 53.

[0229] According to some embodiments of the present application, the present application further provides a power storage device 200, comprising the battery device 100 according to any one of the above embodiments, and the battery device 100 is used for storing or providing electric energy.

[0230] According to some embodiments of the present application, the present application further provides a power storage system 2000, comprising a power conversion device and a power storage device 200 according to any one of the above embodiments, and the power conversion device is used for electrically connecting a power generation device 3000 and the power storage device 200.

[0231] According to some embodiments of the present application, the present application also provides a charging network 1000, comprising the charging pile 300 and the energy storage device 200 provided according to any one of the above embodiments or the energy storage system 2000 provided according to any one of the embodiments, and the energy storage device 200 is used to provide electric energy for the charging pile 300.

[0232] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described.

[0233] Please refer to Figures 6 to 11 According to some embodiments of the present application, the present application provides a battery device 100, which comprises a frame 20, a heat exchange member 30, a battery module 10, a first fastening member 40, a second fastening member 51, a reinforcing member 52 and a third fastening member 53, wherein the first direction X is the height direction of the battery device 100, the second direction Y is the length direction of the battery device 100, and the third direction Z is the width direction of the battery device 100.

[0234] The frame 20 comprises two first frame bodies 21 and two second frame bodies 22, the two first frame bodies 21 are arranged at intervals along the second direction Y, the two second frame bodies 22 are arranged at intervals along the third direction Z, the first frame body 21 is connected with the second frame body 22 to form a ring structure, the first frame body 21 has a cavity 201, and has a first wall 211 and a second wall 212 which are arranged on both sides of the cavity 201 along the first direction X, the first wall 211 is closer to the heat exchange member 30 relative to the second wall 212, the first wall 211 is provided with a first protrusion 203 on the side thereof facing the heat exchange member 30 along the first direction X, and the first protrusion 203 is provided with a first hole 202.

[0235] The heat exchange member 30 is arranged on one side of the frame 20 along the first direction X, and has a heat exchange main body 310 and a positioning portion 320, the positioning portion 320 is connected to the circumferential side of the heat exchange main body 310 and is arranged around the battery module 10, and the positioning portion 320 is connected with the second frame body 22 through a second fastening member 42. The heat exchange main body 310 is arranged between the first wall 211 and the battery module 10, and has a second hole 301, the heat exchange member 30 is supported on the first protrusion 203, along the first direction X, the side surface of the heat exchange main body 310 facing the battery module 10 is recessed relative to the side surface of the positioning portion 320 facing the battery module 10, and the side surface of the heat exchange main body 310 facing the frame 20 is protruded relative to the side surface of the positioning portion 320 facing the battery module 10.

[0236] The heat exchange member 30 includes a first heat exchange plate 31 and a second heat exchange plate 32 connected and arranged, and the first heat exchange plate 31 is close to the battery module 10 relative to the second heat exchange plate 32 along the first direction X. Part of the second heat exchange plate 32 protrudes towards the frame 20 to form a second protruding portion 302, and a medium flow channel 303 is formed between the second protruding portion 302 and the first heat exchange plate 31. The first protruding portion 203 and the second protruding portion 302 are arranged along the third direction Z, and the orthogonal projection of the first protruding portion 203 along the third direction Z overlaps the orthogonal projection of the second protruding portion 302 along the third direction Z.

[0237] The battery module 10 is arranged on the side of the heat exchange member 30 away from the frame 20 along the first direction X, and includes a battery assembly 4 and an end plate 12. The battery assembly 4 includes a plurality of battery monomers 11, and the battery assembly 4 is provided with the end plate 12 on both sides along the second direction Y. The end plate 12 is provided with a third hole 101. In the first direction X, there is a gap 102 between the end plate 12 and the heat exchange member 30. The battery monomer 11 protrudes from the side surface of the end plate 12 along the first direction X towards the heat exchange member 30, and is supported by the heat exchange body 310.

[0238] The end plate 12, the heat exchange member 30 and the frame 20 are connected by a first fastening member 40. The first hole 202, the second hole 301 and the third hole 101 are communicated along the first direction X. The first fastening member 40 includes a first fastener 41 and a second fastener 42. The first fastener 41 includes a main body portion 411, a first connecting portion 412 and a second connecting portion 413. The main body portion 411 is arranged in the second hole 301 and the first hole 202 to connect the heat exchange body 310 and the frame 20. The first connecting portion 412 is connected to one end of the main body portion 411 close to the heat exchange member 30 along the first direction X and is arranged around the main body portion 411. The second connecting portion 413 is connected to the circumferential side of the main body portion 411 and is arranged around the main body portion 411. The second connecting portion 413 is arranged in the cavity 201. The heat exchange body 310 and the first wall 211 abut between the first connecting portion 412 and the second connecting portion 413. The first connecting portion 412 abuts between the heat exchange body 310 and the end plate 12. The second fastener 42 is arranged in the third hole 101 and connected with the first fastener 41.

[0239] The reinforcing member 52 is connected to the side of the frame 20 away from the heat exchange member 30 along the first direction X. The side of the reinforcing member 52 towards the heat exchange member 30 has a third protruding portion 501. The heat exchange body 310 is supported by the third protruding portion 501 and connected with the third protruding portion 501 by a third fastening member 53.

[0240] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0241] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that, include: frame; A heat exchanger is disposed on one side of the frame along the first direction; A battery module is disposed on the side of the heat exchanger away from the frame along the first direction. The battery module includes a battery assembly and an end plate. The end plate is respectively provided at both ends of the battery assembly along the second direction. The first direction intersects the second direction. The first fastening member connects the end plate, the heat exchanger, and the frame. The first fastening member passes through the end plate and the heat exchanger along the first direction and is fixedly connected to the frame.

2. The battery device according to claim 1, characterized in that, The first fastening member is disposed within the frame and is fixedly connected to the frame.

3. The battery device according to claim 1 or 2, characterized in that, The frame has a cavity and a first wall and a second wall surrounding both sides of the cavity along the first direction. The first wall is closer to the heat exchanger than the second wall. The first wall has a first hole, and the first fastening member passes through the first hole and is disposed in the cavity.

4. The battery device according to claim 3, characterized in that, The heat exchanger is provided with a second hole, and the end plate is provided with a third hole. The first hole, the second hole, and the third hole are connected along the first direction, and the first fastening member passes through the first hole, the second hole, and the third hole.

5. The battery device according to claim 4, characterized in that, The first fastening component includes a first fastener and a second fastener. The first fastener passes through the second hole and the first hole to connect the heat exchanger to the frame. The second fastener passes through the third hole and is connected to the first fastener.

6. The battery device according to claim 4, characterized in that, The first hole, the second hole, and the third hole all extend along the first direction.

7. The battery device according to claim 5, characterized in that, The first fastener includes a main body, a first connecting part, and a second connecting part. The main body passes through the second hole and the first hole, and the second fastener is connected to the main body. The first connecting part is connected to one end of the main body near the heat exchanger along the first direction and is disposed around the main body. The second connecting part is connected to the periphery of the main body and is disposed around the main body. The second connecting part is disposed in the cavity. The heat exchanger and the first wall abut against the first connecting part and the second connecting part. The first connecting part abuts against the heat exchanger and the end plate.

8. The battery device according to claim 7, characterized in that, In the first direction, there is a gap between the end plate and the heat exchanger; And / or, the battery assembly protrudes from the side surface of the end plate facing the heat exchanger along the first direction. And / or, the battery assembly is supported on the heat exchanger.

9. The battery device according to claim 1 or 2, characterized in that, The frame has a first protrusion on one side facing the heat exchanger along the first direction, the heat exchanger is supported on the first protrusion, and the first fastening member is connected to the first protrusion.

10. The battery device according to claim 9, characterized in that, The heat exchanger has a second protrusion on one side of the frame along the first direction. The heat exchanger has a medium flow channel located on the side of the second protrusion along the first direction towards the battery module. The first protrusion and the second protrusion are arranged along a third direction. The orthographic projection of the first protrusion along the third direction overlaps with the orthographic projection of the second protrusion along the third direction. The first direction, the second direction, and the third direction intersect each other.

11. The battery device according to claim 10, characterized in that, The heat exchanger includes a first heat exchange plate and a second heat exchange plate connected together. Along the first direction, the first heat exchange plate is closer to the battery module than the second heat exchange plate. A portion of the second heat exchange plate protrudes toward the frame to form a second protrusion. The second protrusion and the first heat exchange plate form the medium flow channel.

12. The battery device according to claim 1 or 2, characterized in that, The heat exchanger has a heat exchange body and a positioning part. The heat exchange body is disposed between the frame and the battery module, and the end plate, the heat exchange body and the frame are connected by the first fastening member. The positioning part is disposed around the battery module.

13. The battery device according to claim 12, characterized in that, The positioning part abuts against the frame; And / or, the battery device further includes a second fastening member, through which the positioning part and the frame are connected.

14. The battery device according to claim 1 or 2, characterized in that, The frame includes two first frames and two second frames. The two first frames are spaced apart along the second direction, and the two second frames are spaced apart along the third direction. The first frames and the second frames are connected to form a ring structure. The end plate, the heat exchanger and the first frames are fixedly connected by the first fastening member. The first direction, the second direction and the third direction intersect each other.

15. The battery device according to claim 1 or 2, characterized in that, The battery device further includes a reinforcing member connected to the frame on the side opposite to the heat exchanger along the first direction.

16. The battery device according to claim 15, characterized in that, The battery device further includes a third fastening member, through which the heat exchange member and the reinforcing member are connected; And / or, the reinforcing member has a third protrusion on one side of the heat exchanger along the first direction, and the heat exchanger is supported on the third protrusion.

17. An energy storage device, characterized in that, It includes a plurality of battery devices according to any one of claims 1 to 16, the battery devices being used to store or provide electrical energy.

18. An energy storage system, characterized in that, It includes a power conversion device and an energy storage device as described in claim 17, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

19. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in claim 17 or an energy storage system as described in claim 18, wherein the energy storage device is used to provide electrical energy to the charging pile.

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