Battery device, power utilization device and energy storage device

Abstract

The embodiment of the invention provides a battery device, a power utilization device and an energy storage device. The heat dissipation performance of the battery device can be improved. The battery device comprises a single battery, a heat management part and a heat exchange pipeline, the single battery is provided with a containing cavity for containing an electrode assembly, the heat management part is used for containing electrolyte to adjust the temperature of the single battery, and the heat exchange pipeline comprises a liquid inlet pipeline and a liquid outlet pipeline which are isolated from each other; the two ends of the liquid inlet pipeline and the liquid outlet pipeline in the extending direction are communicated with the heat management component respectively, and the liquid inlet pipeline and the liquid outlet pipeline are communicated with the containing cavities of the battery monomers respectively, so that a heat exchange loop used for adjusting the temperature of the battery monomers is formed among the liquid inlet pipeline, the containing cavities, the liquid outlet pipeline and the heat management component; the battery monomer comprises a first wall, the first wall comprises a first through hole penetrating through the first wall in the thickness direction of the first wall, and the liquid inlet pipeline is communicated with the containing cavity through the first through hole.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device, an electrical device, and an energy storage device. Background Art

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

[0003] In the development of battery technology, in addition to improving the electrical performance of battery devices, heat dissipation is also an issue that cannot be ignored. For example, the internal structure of the battery cell is prone to thermal runaway at high temperatures, reducing the safety of the battery device. If the safety of the battery device cannot be guaranteed, the battery device cannot be used, reducing the performance of the battery device. Therefore, how to improve the heat dissipation performance of the battery device has become a technical problem that needs to be solved in this field. Summary of the invention

[0004] The embodiments of the present application provide a battery device, an electrical device, and an energy storage device, which can improve the heat dissipation performance of the battery device.

[0005] In a first aspect, the present application provides a battery device, which includes a battery cell having a housing cavity for accommodating an electrode assembly; a thermal management component for accommodating an electrolyte to regulate the temperature of the battery cell; a heat exchange pipeline, including a liquid inlet pipeline and a liquid outlet pipeline isolated from each other, the liquid inlet pipeline and the liquid outlet pipeline being connected to the thermal management component at both ends along their extension direction; wherein the liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the housing cavity of the battery cell, so that a heat exchange circuit for regulating the temperature of the battery cell is formed between the liquid inlet pipeline, the housing cavity, the liquid outlet pipeline and the thermal management component.

[0006] In an embodiment of the present application, a battery cell, a thermal management component and a heat exchange pipeline are provided in a battery device, the heat exchange pipeline includes a liquid inlet pipeline and a liquid outlet pipeline isolated from each other, the liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the thermal management component at both ends along their extension direction, and the liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the accommodating cavity of the battery cell, so that a heat exchange circuit for adjusting the temperature of the battery cell is formed between the liquid inlet pipeline, the accommodating cavity, the liquid outlet pipeline and the thermal management component, that is, the electrolyte is circulated between the accommodating cavity and the thermal management component as a heat exchange medium, effectively improving the uniformity of the internal temperature distribution of the battery cell of the battery device during the thermal management process, so as to reduce the temperature difference of the battery cell in the height direction, thereby improving the heat dissipation performance of the battery device.

[0007] In some embodiments, the battery cell includes a first wall, the first wall includes a first through hole penetrating the first wall along a thickness direction of the first wall, and the liquid inlet pipeline is connected to the accommodating cavity through the first through hole.

[0008] In the embodiment of the present application, the battery cell is configured to include a first wall, and the first wall includes a first through hole that penetrates the first wall along the thickness direction of the first wall, and the liquid inlet pipeline is connected with the accommodating cavity through the first through hole, so that the accommodating cavity is connected with the thermal management component, and the cooled electrolyte can enter the accommodating cavity through the liquid inlet pipeline and the first through hole in turn to regulate the temperature of the battery cell. At the same time, the structural design is simple and easy to process and manufacture.

[0009] In some embodiments, the first wall also includes a second through hole that penetrates the first wall along the thickness direction of the first wall, and the liquid outlet pipeline is connected to the accommodating cavity through the second through hole. On a plane perpendicular to the thickness direction of the first wall, the projection of the first through hole does not overlap with the projection of the second through hole.

[0010] In the embodiment of the present application, by further configuring the first wall to include a second through hole penetrating the first wall along the thickness direction of the first wall, and the liquid outlet pipeline is connected to the accommodating chamber through the second through hole, it is convenient to achieve communication between the liquid inlet pipeline, the accommodating chamber, the liquid outlet pipeline and the thermal management component, that is, the electrolyte is circulated between the accommodating chamber and the thermal management component as a heat exchange medium, effectively improving the uniformity of the internal temperature distribution of the battery cell during the thermal management process of the battery device, so as to reduce the temperature difference of the battery cell in the height direction, thereby improving the heat dissipation performance of the battery device, and secondly, on a plane perpendicular to the thickness direction of the first wall, the projection of the first through hole and the projection of the second through hole are configured not to overlap, so as to reduce the mutual influence between the liquid outlet pipeline and the liquid inlet pipeline, and at the same time, the liquid outlet pipeline and the liquid inlet pipeline are both arranged on the first wall to facilitate the assembly of the battery device.

[0011] In some embodiments, the surface of the liquid inlet pipeline close to the first wall is attached to the first wall, and / or the surface of the liquid outlet pipeline close to the first wall is attached to the first wall. Thus, in the embodiments of the present application, by setting the surface of the liquid inlet pipeline close to the first wall to be attached to the first wall, and / or setting the surface of the liquid outlet pipeline close to the first wall to be attached to the first wall, the fixing effect between the battery cell and the liquid inlet pipeline and / or the liquid outlet pipeline is improved, so as to reduce the risk of shaking or collision between the battery cell and the liquid inlet pipeline and / or the liquid outlet pipeline under different working conditions of the battery device, and improve the performance of the battery device.

[0012] In some embodiments, the battery cell further includes a pressure relief mechanism, which is disposed on other walls of the battery cell except the first wall. Thus, in the embodiment of the present application, by disposing the pressure relief mechanism of the battery cell on other walls of the battery cell except the first wall, the influence of the pressure relief mechanism on the liquid inlet pipeline and / or the liquid outlet pipeline during the actuation process is reduced, so as to facilitate the normal operation of the thermal management component, thereby improving the performance of the battery device.

[0013] In some embodiments, the battery cell also includes a second wall, which is adjacent to or opposite to the first wall. The second wall includes a third through hole that penetrates the second wall along the thickness direction of the second wall, and the liquid outlet pipeline is connected to the accommodating cavity through the third through hole.

[0014] In an embodiment of the present application, the battery cell also includes a second wall, and the second wall is adjacent to or opposite to the first wall. By configuring the second wall to include a third through hole penetrating the second wall along the thickness direction of the second wall, the liquid outlet pipeline is connected to the accommodating cavity through the third through hole, that is, the liquid inlet pipeline and the liquid outlet pipeline are respectively arranged on the first wall and the second wall. When the battery device is in different working conditions, the risk of shaking or collision between the liquid inlet pipeline and the liquid outlet pipeline can be effectively reduced, thereby improving the performance of the battery device.

[0015] In some embodiments, the second wall is arranged relative to the first wall along a first direction, the first direction is the height direction of the battery cell, and the first wall and the second wall are arranged along the gravity direction. Thus, in the embodiment of the present application, by arranging the second wall and the first wall relative to each other along the first direction, the first direction is the height direction of the battery cell, and the first wall and the second wall are arranged along the gravity direction, the electrolyte can pass through the liquid inlet pipeline, the accommodating chamber, the liquid outlet pipeline and the thermal management component in sequence under the action of gravity, thereby improving the flow rate of the electrolyte, thereby improving the heat dissipation effect of the battery device, while saving the driving force of the thermal management component on the electrolyte, and reducing the processing and manufacturing costs of the battery device.

[0016] In some embodiments, the battery device further includes a first monitoring device, which is used to monitor the composition of the electrolyte inside the liquid inlet pipeline and / or the liquid outlet pipeline.

[0017] In an embodiment of the present application, a first monitoring device is provided in the battery device, and the first monitoring device is used to monitor the composition of the electrolyte inside the liquid inlet pipeline and / or the liquid outlet pipeline, so that the battery device can perform real-time regulation of the electrolyte flowing through the liquid inlet pipeline and / or the liquid outlet pipeline according to the monitoring results of the above-mentioned electrolyte composition, thereby improving the heat dissipation performance of the battery device.

[0018] In some embodiments, the battery device further includes a valve component, which is used to control the communication between the accommodating cavity and the thermal management component. Thus, in the embodiment of the present application, the battery device is further provided with a valve component, and the valve component is used to control the communication between the accommodating cavity and the thermal management component, so as to control the flow or non-flow of electrolyte between the battery cell and the thermal management. In the event of thermal runaway of the battery cell or abnormality of the thermal management component, the valve component can be used to interrupt the accommodating cavity of the battery cell and the thermal management component to cut off the delivery of electrolyte, thereby improving the performance of the battery device.

[0019] In some embodiments, the valve component includes two first valves, which are respectively arranged at two ends of the liquid inlet pipeline along the extension direction of the liquid inlet pipeline, and / or the valve component includes two second valves, which are respectively arranged at two ends of the liquid outlet pipeline along the extension direction of the liquid outlet pipeline.

[0020] In the embodiment of the present application, the valve component is configured to include two first valves, and the two first valves are respectively arranged at the two ends of the liquid inlet pipeline along the extension direction of the liquid inlet pipeline, and / or the valve component is configured to include two second valves, and the two second valves are respectively arranged at the two ends of the liquid outlet pipeline along the extension direction of the liquid outlet pipeline, so as to control the circulation or non-circulation of electrolyte between the battery cell and the thermal management component, so that when the battery cell has thermal runaway or the thermal management component has an abnormality, the valve component can be used to timely interrupt the battery cell accommodating cavity and the thermal management component to cut off the delivery of electrolyte, thereby effectively improving the performance of the battery device. At the same time, the setting structure is simple and convenient for processing and manufacturing of the battery device.

[0021] In some embodiments, the battery device also includes a second monitoring device, which is used to monitor at least one of the following parameters: the temperature of the battery cell, the voltage of the battery cell, and the composition of the gas inside the battery device. The second monitoring device is also used to control the opening or closing of the valve component according to the parameter.

[0022] In an embodiment of the present application, a second monitoring device is provided in the battery device, and the second monitoring device is used to monitor at least one of the following parameters: the temperature of the battery cell, the voltage of the battery cell, and the composition of the gas inside the battery device. The second monitoring device is also used to control the opening or closing of the valve component according to the parameter. When the second monitoring device detects that the temperature of the battery cell, the voltage of the battery cell or the composition of the gas inside the battery device is abnormal, the valve component can be closed in time to disconnect the accommodating cavity of the battery cell from the thermal management component, so as to cut off the delivery of the electrolyte, thereby effectively improving the performance of the battery device.

[0023] In a second aspect, an electrical device is provided, comprising the battery device described in the first aspect, wherein the battery device is used to provide electrical energy to the electrical device.

[0024] In some implementations, the electrical device may be a vehicle, a ship, or a spacecraft.

[0025] In a third aspect, an energy storage device is provided, comprising the battery device described in the first aspect, wherein the battery device is used to store electrical energy for the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the structure of a vehicle provided in one embodiment of the present application.

[0028] Figure 2 It is a structural schematic diagram of a battery device provided in one embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the structure of a battery cell provided in one embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the exploded structure of a battery cell provided in another embodiment of the present application.

[0031] Figure 5 is a cross-sectional schematic diagram of a battery device provided in one embodiment of the present application.

[0032] Figure 6 is a cross-sectional schematic diagram of a battery device provided in another embodiment of the present application.

[0033] Figure 7is a cross-sectional schematic diagram of a battery device provided in another embodiment of the present application.

[0034] Figure 8 is a cross-sectional schematic diagram of a battery device provided in another embodiment of the present application.

[0035] Fig. 9 is a cross-sectional schematic diagram of a battery device provided in another embodiment of the present application.

[0036] Fig.10 is a cross-sectional schematic diagram of a battery device provided in another embodiment of the present application.

[0037] Explanation of the reference numerals: 1-vehicle; 10-battery device; 20-battery cell; 30-controller; 40-motor; 111-first structure; 112-second structure; 112a-bottom plate; 112b-side plate; 21-housing; 22-electrode assembly; 211-shell; 212-end cover; 213-pressure relief mechanism; 222a-positive electrode ear; 222b-negative electrode ear; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 23-connecting member; 215-first wall; 50-heat exchange pipeline; 510-liquid inlet pipeline; 520-liquid outlet pipeline; 24-accommodating chamber; 216-first through hole; 217-second through hole; 218-second wall; 219-third through hole; 60-valve component; 610-first valve; 620-second valve.

[0038] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0042] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0046] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0047] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0048] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0049] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0050] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0051] As an example, the positive electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium or silver, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0052] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a foamed nickel, a foamed copper, a foamed aluminum, a foamed alloy, or a foamed carbon. When the foamed metal is used as the positive electrode, the positive electrode active material may not be disposed on the surface of the foamed metal, but of course, the positive electrode active material may also be disposed. As an example, the positive electrode active material is filled or / and deposited in the foamed metal.

[0053] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0054] As an example, the negative electrode current collector may be a metal foil, a conductive polymer material, a carbon material or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium or silver, etc., may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0055] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0056] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is disposed on either or both of the two facing surfaces of the negative electrode current collector.

[0057] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0058] In some embodiments, the negative electrode may be a foam metal. The foam metal may be foam nickel, foam copper, foam aluminum, foam alloy, or foam carbon, etc. When the foam metal is used as the negative electrode sheet, the surface of the foam metal may not be provided with a negative electrode active material, but of course, a negative electrode active material may also be provided.

[0059] As an example, a negative electrode active material may be filled and / or deposited in the negative electrode current collector.

[0060] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0061] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0062] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0063] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be coated on the surface of the separator.

[0064] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0065] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0066] The liquid electrolyte includes an electrolyte salt and a solvent.

[0067] In some embodiments, the electrolyte may also optionally include additives. For example, the additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of battery cells, such as additives that improve overcharge / fast charge performance of battery cells, additives that improve high temperature performance of battery cells, and additives that improve low temperature performance of battery cells.

[0068] Among them, the gel electrolyte includes a polymer as a skeleton network and can be used in combination with an ionic liquid-lithium salt.

[0069] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0070] As examples, the polymer of the polymer solid electrolyte may include polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, a polyionic liquid, cellulose, and the like.

[0071] As an example, the inorganic solid electrolyte can be an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphide, germanium sulfide silver), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0072] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0073] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0074] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0075] In some embodiments, the electrode assembly is a laminate structure.

[0076] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0077] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0078] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0079] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0080] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0081] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0082] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0083] In some embodiments, the battery cell may include a shell. The shell may 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. In some embodiments, the shell may be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell plays a role in protecting the electrode assembly, and a sealed bag is also included between the shell and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0084] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0085] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through a current collecting member. The electrode terminal may be disposed on an end cap, or may be disposed on the housing.

[0086] In some embodiments, a pressure relief mechanism is provided on the housing, and the pressure relief mechanism is used to discharge the internal gas of the battery cell.

[0087] As an example, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell.

[0088] As an example, the pressure relief mechanism may be integrally formed with the housing.

[0089] As an example, the pressure relief mechanism may also be separately provided and connected to the housing.

[0090] The "actuation" mentioned in this application means that the pressure relief mechanism is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell can be released. The action produced by the pressure relief mechanism may include but is not limited to: the components in the pressure relief mechanism move to form an exhaust channel, at least a part of the pressure relief mechanism ruptures, breaks, is torn or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell will be discharged from the actuated part as emissions. In this way, the battery cell can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0091] In some embodiments, when the outer shell is a non-sealed structure, the pressure relief mechanism can be set as a through hole to discharge the gas inside the battery cell.

[0092] The emissions from the battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases produced by the reaction, flames, and the like.

[0093] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0094] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0095] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0096] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0097] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0098] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0099] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0100] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0101] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0102] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0103] The embodiment of the present application provides an energy storage device, including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0104] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption and provide electrical energy to relevant users or electrical devices during peak electricity consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0105] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0106] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0107] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0108] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0109] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes auxiliary battery management units, fusion switches and other modules.

[0110] As an example, the master control module can be used as a battery management unit of the energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charge and discharge current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes modules such as an insulation monitoring module, a main battery management unit, an Ethernet and optical fiber conversion module, etc.

[0111] As an example, the fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire in the energy storage system. As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0112] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development. In the development of battery technology, in addition to improving the electrical performance of battery devices, heat dissipation is also an issue that cannot be ignored. For example, the internal structure of the battery cell is prone to thermal runaway of the battery at high temperatures, reducing the safety of the battery device. Usually, fans, air conditioners or liquid cooling systems are used to cool the battery device. Fans and air conditioners make the spatial consistency of the entire heat dissipation system poor, and the water cooling plate in the liquid cooling system is usually in contact with the bottom surface of the battery device, so that the temperature difference of the battery device along the height direction is large, and the heat dissipation effect of the battery device is poor. If the safety of the battery device cannot be guaranteed, the battery device cannot be used, which reduces the performance of the battery device. Therefore, how to improve the heat dissipation performance of battery cells has become a technical problem that needs to be solved in this field.

[0113] Therefore, an embodiment of the present application provides a battery device, an electrical device and an energy storage device, wherein the battery device includes: a battery cell having a housing cavity for accommodating an electrode assembly; a thermal management component for accommodating an electrolyte to regulate the temperature of the battery cell; a heat exchange pipeline, including a liquid inlet pipeline and a liquid outlet pipeline isolated from each other, the liquid inlet pipeline and the liquid outlet pipeline being connected to the thermal management component at both ends along their extension direction; wherein the liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the housing cavity of the battery cell, so that a heat exchange circuit for regulating the temperature of the battery cell is formed between the liquid inlet pipeline, the housing cavity, the liquid outlet pipeline and the thermal management component. In this way, in the embodiment of the present application, a battery cell, a thermal management component and a heat exchange pipeline are provided in the battery device, and the heat exchange pipeline includes a liquid inlet pipeline and a liquid outlet pipeline isolated from each other, and the liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the thermal management component at both ends along the extension direction thereof, and the liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the accommodating cavity of the battery cell, so that a heat exchange circuit for regulating the temperature of the battery cell is formed between the liquid inlet pipeline, the accommodating cavity, the liquid outlet pipeline and the thermal management component, that is, the electrolyte is circulated between the accommodating cavity and the thermal management component as a heat exchange medium, thereby effectively improving the uniformity of the internal temperature distribution of the battery cell of the battery device during the thermal management process, so as to reduce the temperature difference of the battery cell in the height direction, thereby improving the heat dissipation performance of the battery device.

[0114] The technical solutions described in the embodiments of the present application are applicable to various electrical equipment using battery devices.

[0115] Electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, and the like. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, and the like; spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0116] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical equipment described above, but can also be applied to all equipment using batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0117] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery device 10 may be provided inside the vehicle 1. The controller 30 is used to control the battery device 10 to supply power to the motor 40. For example, a battery device 10 may be provided at the bottom, front or rear of the vehicle 1. The battery device 10 may be used to supply power to the vehicle 1. For example, the battery device 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery device 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0118] In order to meet different power usage requirements, the battery device 10 in the embodiment of the present application may include at least one battery cell assembly, and the battery cell assembly includes multiple battery cells, wherein the multiple battery cells can be electrically connected in series, in parallel, or in mixed connection to form a battery device 10, wherein mixed connection refers to a mixture of series and parallel connection. The battery device 10 may also be referred to as a battery pack. For example, multiple battery cells can first be connected in series, in parallel, or in mixed connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in mixed connection to form a battery device 10. In other words, multiple battery cells can directly form a battery device 10, or they can first be formed into a battery module, and then the battery modules can be formed into a battery device 10.

[0119] For example, Figure 2 , which is a schematic diagram of the structure of a battery device 10 according to an embodiment of the present application, and the battery device 10 may include a plurality of battery cells 20. The battery device 10 may also include a box body 11 (or a cover body), the interior of the box body 11 is a hollow structure, and the plurality of battery cells 20 are accommodated in the box body 11. For example, the plurality of battery cells 20 are connected in parallel, in series, or in a mixed combination and then placed in the box body 11.

[0120] like Figure 2As shown, the box body 11 may include two parts, which are respectively referred to as the first structure 111 and the second structure 112, and the first structure 111 and the second structure 112 are buckled together. The shapes of the first structure 111 and the second structure 112 may be determined according to the shapes of the combination of multiple battery cells 20, and the first structure 111 and the second structure 112 may both have an opening. For example, the first structure 111 and the second structure 112 may both be hollow cuboids and each have only one face as an opening face, the opening of the first structure 111 and the opening of the second structure 112 are arranged opposite to each other, and the first structure 111 and the second structure 112 are buckled together to form a box body 11 with a closed chamber. Among them, the second structure 112 may include a bottom plate 112a, a side plate 112b and a beam. After a plurality of battery cells 20 are connected in parallel or in series or in a mixed combination, they are placed in the box body 11 formed after the first structure 111 and the second structure 112 are buckled.

[0121] Optionally, the battery device 10 may also include other structures, which are not described one by one here. For example, the battery device 10 may also include a busbar component, which is used to realize the electrical connection between multiple battery cells 20, such as parallel connection, series connection or mixed connection. Specifically, the busbar component can realize the electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0122] The number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel or mixed to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery device 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand.

[0123] In an embodiment of the present application, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, in parallel or in a mixed manner to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery device 10 may be large, in order to facilitate installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand. The battery device 10 may include multiple battery modules, which can be connected in series, in parallel or in a mixed manner.

[0124] Figure 31 shows a schematic structural diagram of a battery cell 20 provided in an embodiment of the present application. Figure 4 FIG. 2 shows a schematic diagram of the exploded structure of a battery cell 20 provided in another embodiment of the present application. Figure 3 and Figure 4 As shown, the battery cell 20 of the embodiment of the present application may include: a shell 21 and an electrode assembly 22, the shell 21 having a closed accommodation space, and the electrode assembly 22 is placed in the accommodation space in the shell 21. The shell 21 may include a shell 211 and an end cover 212, the shell 211 is a hollow structure having at least one opening; the end cover 212 is used to be mutually buckled with the shell 211 to form the shell 21 having a closed accommodation space.

[0125] In some embodiments, the end cap 212 may be a plate-like structure for covering the opening of the housing 211. In other embodiments, the end cap 212 has a similar structure to the housing 211, that is, both the housing 211 and the end cap 212 are hollow structures with one opening, and the two openings are butted together to form a housing 21 with a closed accommodation space.

[0126] It should be understood that if the end cover 212 is a plate-like structure, the shell 211 can be a hollow structure with an opening formed at one end or multiple ends. For example, if the shell 211 is a hollow structure with an opening formed at one end, the end cover 212 can be set to one; if the shell 211 is a hollow structure with openings formed at two opposite ends, the end cover 212 can be set to two, and the two end covers 212 respectively cover the openings at both ends of the shell 211.

[0127] The housing 21 may be in various shapes, such as a cylinder, a cuboid, or other polyhedrons. Figure 3 and Figure 4 As shown, in the embodiment of the present application, the description is mainly made by taking the shell 21 as a rectangular parallelepiped structure as an example.

[0128] It should be understood that the end cap 212 of the embodiment of the present application is used to cooperate with the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 212 can be adapted to the shape of the housing 211, such as Figure 3 and Figure 4 As shown, the shell 211 is a rectangular parallelepiped structure, and the end cover 212 is a rectangular plate structure matched with the shell 211 .

[0129] In some embodiments, the housing 211 may be a hollow structure with an opening formed at least at one end, and the shape of the end cap 212 may be adapted to the shape of the housing 211. The end cap 212 is used to cover the opening of the housing 211 so that the housing 21 isolates the internal environment of the battery cell 20 from the external environment. If the housing 211 is a hollow structure with an opening formed at one end, one end cap 212 may be provided.

[0130] The material of the housing 211 in the embodiment of the present application may include one or more types, for example, copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cover 212 may also be one or more types, for example, copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cover 212 may be the same as or different from that of the housing 211; the materials of different walls of the housing 211 may also be the same or different.

[0131] The end cap 212 of the embodiment of the present application can be any wall of the housing 21. For example, the end cap 212 can be the wall with the largest area among the multiple walls included in the housing 21, or the wall with the smallest area, or can also be other walls. The embodiment of the present application is not limited thereto. Alternatively, the end cap 212 can also be other structures. For example, the end cap 212 can also be a groove structure with an opening, so that the opening of the end cap 212 covers the opening of the housing 211. The embodiment of the present application is not limited thereto.

[0132] It should be understood that the battery cell 20 further includes an electrode terminal 214. The electrode terminal 214 of the present embodiment is used to electrically connect to the electrode assembly 22 inside the battery cell 20 to output the electrical energy of the battery cell 20. Figure 3 to Figure 4 As shown, the battery cell 20 may include at least two electrode terminals 214, and the at least two electrode terminals 214 may include at least one positive electrode terminal 214a and at least one negative electrode terminal 214b, the positive electrode terminal 214a is used to be electrically connected to the positive electrode tab 222a of the electrode assembly 22, and the negative electrode terminal 214b is used to be electrically connected to the negative electrode tab 222b of the electrode assembly 22. The positive electrode terminal 214a and the positive electrode tab 222a may be directly connected or indirectly connected, and the negative electrode terminal 214b and the negative electrode tab 222b may be directly connected or indirectly connected. Exemplarily, the positive electrode terminal 214a may be electrically connected to the positive electrode tab 222a through a connecting member 23, and the negative electrode terminal 214b may be electrically connected to the negative electrode tab 222b through a connecting member 23.

[0133] In the embodiment of the present application, the wall of the housing 211 and the wall of the end cover 212 are both referred to as the wall of the battery cell 20. Figure 3 and Figure 4In the rectangular battery cell 20 shown in the figure, the wall of the shell 211 includes a bottom wall and four side walls. The shell 211 is determined according to the shape of one or more electrode assemblies 22 after being combined. For example, the shell 211 can be a hollow rectangular parallelepiped or a cube or a cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow rectangular parallelepiped or a cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall body so that the shell 211 communicates with the inside and outside. When the shell 211 can be a hollow cylinder, the end face of the shell 211 is an open face, that is, the end face does not have a wall body so that the shell 211 communicates with the inside and outside. The end cap 212 covers the opening and is connected to the shell 211 to form a closed cavity for placing the electrode assembly 22. The shell 211 is filled with an electrolyte, such as an electrolyte.

[0134] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0135] The pressure relief mechanism 213 may be any possible pressure relief mechanism 213. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal gas pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0136] In some implementations, the battery cell 20 further includes a support plate assembly, which is disposed inside the housing 211, and a side of the support plate assembly away from the electrode assembly 22 is attached to a side of the bottom wall of the housing 211 facing the electrode assembly 22. Exemplarily, the support plate assembly may be fixedly connected or not fixedly connected to the side of the bottom wall of the housing 211 facing the electrode assembly 22, for example, the side of the support plate assembly away from the electrode assembly 22 is bonded to the side of the bottom wall of the housing 211 facing the electrode assembly 22.

[0137] In some implementations, the end cover 212 of the battery cell 20 is provided with a liquid injection hole, through which electrolyte can be injected into the interior of the battery cell 20 to replenish the electrolyte of the battery cell 20 .

[0138] In the battery cell 20, the electrode assembly 22 is a component in the battery cell 20 where an electrochemical reaction occurs. According to actual use requirements, the electrode assembly 22 in the housing 211 can be set to one or more. Figure 4As shown, two electrode assemblies 22 are arranged in the battery cell 20. The electrode assembly 22 can be cylindrical, rectangular, etc. If the electrode assembly 22 is a cylindrical structure, the housing 211 can also be a cylindrical structure. If the electrode assembly 22 is a rectangular structure, the housing 211 can also be a rectangular structure.

[0139] In some implementations, an insulating member may be further provided in the battery cell 20, and the insulating member is provided in the accommodation space of the housing 211, and the insulating member may be a hollow structure with one or more ends formed with an opening, and the accommodation space in the hollow structure is used to accommodate the electrode assembly 22, so as to improve the insulation performance of the battery cell 20. It should also be understood that in some implementations, the battery cell 20 further includes a bonding member, which may be provided between the insulating member and the support plate assembly, and is used to fix the insulating member and the support plate assembly, and illustratively, the bonding member may be an L-shaped structure.

[0140] In some implementations, the battery cell 20 may also include other structures, which will not be described one by one here. For example, the battery cell 20 may also include a busbar component (not shown in the figure), which is used to realize the electrical connection between multiple battery cells 20, such as parallel or series or mixed connection. Specifically, the busbar component can realize the electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cell 20 by welding. The electrical energy of multiple battery cells 20 can be further led out through the box 11 through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0141] Figure 5 A cross-sectional schematic diagram of a battery device 10 provided in another embodiment of the present application is shown. Figure 6 A cross-sectional schematic diagram of a battery device 10 provided in another embodiment of the present application is shown. Figure 7 A schematic structural diagram of a battery device 10 provided in another embodiment of the present application is shown.

[0142] In some implementations, such as Figures 5 to 7As shown, the battery device 10 includes: a battery cell 20, a thermal management component (not shown in the figure) and a heat exchange pipeline 50, the battery cell 20 has a receiving cavity 24 for receiving an electrode assembly 22, the thermal management component is used to receive an electrolyte to adjust the temperature of the battery cell 20, and the heat exchange pipeline 50 includes an inlet pipeline 510 and an outlet pipeline 520 isolated from each other, and the inlet pipeline 510 and the outlet pipeline 520 are respectively connected to the thermal management component at both ends along the extension direction thereof, wherein the inlet pipeline 510 and the outlet pipeline 520 are respectively connected to the receiving cavity 24 of the battery cell 20, so that a heat exchange circuit for adjusting the temperature of the battery cell 20 is formed between the inlet pipeline 510, the receiving cavity 24, the outlet pipeline 520 and the thermal management component.

[0143] It should be understood that the thermal management component in the embodiment of the present application may include a compressor, a cooler, a vacuum pump and an injection pump. The compressor can be used to adjust the flow rate of the electrolyte inside the heat exchange circuit according to the needs of the current heat exchange circuit to maintain the temperature and pressure state of the heat exchange circuit; the cooler is used to perform heat exchange, that is, through heat exchange with the external environment or other media, the cooler cools the electrolyte during the condensation process to achieve a refrigeration effect; the vacuum pump is used to evacuate, for example, during the installation and maintenance of the heat exchange circuit, the vacuum pump is used to extract air and moisture from the heat exchange circuit to improve the air tightness inside the heat exchange circuit and prevent these impurities from affecting the refrigerant. For example, in the case of thermal runaway of the battery cell 20 inside the battery device 10, the electrolyte inside the battery cell 20 can be extracted by the vacuum pump to slow down or reduce the thermal runaway process of the battery cell 20; the injection pump is used to transport the cooled electrolyte to the accommodating cavity 24 of the battery cell 20, and at the same time can maintain the flow pressure of the electrolyte in the heat exchange circuit to enable the normal operation of the entire heat exchange circuit.

[0144] It should also be understood that the thermal management component in the embodiment of the present application is used to accommodate the electrolyte, which means that in the heat exchange circuit, the electrolyte flowing between the thermal management component and the battery cell 20 can be used as a heat exchange medium to adjust the temperature of the battery cell 20. It should also be understood that the thermal management component in the embodiment of the present application can be used to adjust the temperature of the battery cell 20, which means that the thermal management component can increase or decrease the temperature of the battery cell 20. Specifically, the thermal management component can adjust the temperature of the battery cell 20 according to actual needs.

[0145] It should also be understood that the liquid inlet pipeline 510 and the liquid outlet pipeline 520 in the embodiment of the present application are isolated from each other, and both ends of the liquid inlet pipeline 510 are respectively connected to the thermal management component, and both ends of the liquid outlet pipeline 520 are respectively connected to the thermal management component.

[0146] It should also be understood that the liquid inlet pipeline 510 can be connected to the accommodating cavity 24 of the battery cell 20, and the liquid outlet pipeline 520 can be connected to the accommodating cavity 24 of the battery cell 20, so that the liquid inlet pipeline 510, the accommodating cavity 24, the liquid outlet pipeline 520 and the thermal management component are connected to form a heat exchange circuit, and the electrolyte can circulate inside the heat exchange circuit to regulate the temperature of the battery cell 20.

[0147] It should also be understood that when the battery device 10 includes multiple battery cells 20, the liquid inlet pipeline 510 can be connected to at least some of the multiple battery cells 20, for example, the liquid inlet pipeline 510 can be connected to each of the multiple battery cells 20, and the liquid outlet pipeline 520 can be connected to at least some of the battery cells 20, for example, the liquid outlet pipeline 520 can be connected to each of the multiple battery cells 20.

[0148] It should also be understood that the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 may be attached or not attached to the wall connected to the battery cell 20. For example, the liquid inlet pipeline 510 may be adhesively connected to the wall connected to the battery cell 20. For another example, the liquid outlet pipeline 520 may be spaced apart from the wall connected to the battery cell 20, that is, a gap is provided between the liquid outlet pipeline 520 and the wall connected to the battery cell 20.

[0149] In the embodiment of the present application, a battery cell 20, a thermal management component and a heat exchange pipeline 50 are provided in the battery device 10, and the heat exchange pipeline 50 includes a liquid inlet pipeline 510 and a liquid outlet pipeline 520 which are isolated from each other. The liquid inlet pipeline 510 and the liquid outlet pipeline 520 are respectively connected to the thermal management component at both ends along the extension direction thereof, and the liquid inlet pipeline 510 and the liquid outlet pipeline 520 are respectively connected to the accommodating cavity 24 of the battery cell 20, so that a heat exchange circuit for adjusting the temperature of the battery cell 20 is formed between the liquid inlet pipeline 510, the accommodating cavity 24, the liquid outlet pipeline 520 and the thermal management component, that is, the electrolyte is circulated between the accommodating cavity 24 and the thermal management component as a heat exchange medium, thereby effectively improving the uniformity of the internal temperature distribution of the battery cell 20 of the battery device 10 during the thermal management process, so as to reduce the temperature difference of the battery cell 20 in the height direction, thereby improving the heat dissipation performance of the battery device 10.

[0150] In some implementations, such as Figures 5 to 7 As shown, the battery cell 20 includes a first wall 215 , and the first wall 215 includes a first through hole 216 penetrating the first wall 215 along the thickness direction of the first wall 215 . The liquid inlet pipeline 510 is connected to the accommodating cavity 24 through the first through hole 216 .

[0151] It should be understood that the battery cell 20 of the embodiment of the present application can be a polyhedral structure of any shape, that is, the housing 211 in the battery cell 20 can include multiple walls, and the first wall 215 is any wall of the housing 211 of the battery cell 20. It should also be understood that the first wall 215 can be the wall where the end cover 212 of the battery cell 20 is located.

[0152] Exemplarily, the first wall 215 includes but is not limited to the following examples: the first wall 215 may be the wall with the smallest area of ​​the shell 211 of the battery cell 20; the first wall 215 may also be the wall with the largest area of ​​the shell 211 of the battery cell 20; the first wall 215 may be the wall of the shell 211 of the battery cell 20 on which the electrode terminal 214 is provided; the first wall 215 may be the wall adjacent to the wall of the battery cell 20 on which the electrode terminal 214 is provided; the first wall may be the wall opposite to the wall of the battery cell 20 on which the electrode terminal 214 is provided.

[0153] It should also be understood that the shape of the first through hole 216 provided on the first wall 215 can be set according to actual needs, and on a plane perpendicular to the thickness direction of the first wall 215, the shape of the first through hole 216 can be circular, elliptical, polygonal, rectangular, etc. It should also be understood that the number of the first through holes 216 provided on the first wall 215 of each battery cell 20 can be set according to actual needs, for example, the first wall 215 can be provided with one or more of the above-mentioned first through holes 216.

[0154] In the embodiment of the present application, the battery cell 20 is configured to include a first wall 215, and the first wall 215 includes a first through hole 216 that penetrates the first wall 215 along the thickness direction of the first wall 215, and the liquid inlet pipeline 510 is connected with the accommodating cavity 24 through the first through hole 216, so that the accommodating cavity 24 is connected with the thermal management component, and the cooled electrolyte can enter the accommodating cavity 24 through the liquid inlet pipeline 510 and the first through hole 216 in turn to adjust the temperature of the battery cell 20. At the same time, the structural design is simple and easy to process and manufacture.

[0155] In some implementations, such as Figures 5 to 7 As shown, the first wall 215 also includes a second through hole 217 that penetrates the first wall 215 along the thickness direction of the first wall 215, and the liquid outlet pipeline 520 is connected to the accommodating cavity 24 through the second through hole 217. On a plane perpendicular to the thickness direction of the first wall 215, the projection of the first through hole 216 does not overlap with the projection of the second through hole 217.

[0156] It should be understood that the shape of the second through hole 217 provided on the first wall 215 can be set according to actual needs, and on a plane perpendicular to the thickness direction of the first wall 215, the shape of the second through hole 217 can be circular, elliptical, polygonal, rectangular, etc. It should also be understood that the number of the second through holes 217 provided on the first wall 215 of each battery cell 20 can be set according to actual needs, for example, the first wall 215 can be provided with one or more of the above-mentioned second through holes 217.

[0157] It should also be understood that the projection of the first through hole 216 and the projection of the second through hole 217 do not overlap, that is, the first through hole 216 and the second through hole 217 are respectively arranged in different areas on the first wall 215. For example, the first through hole 216 can be arranged at one end of the first wall 215 along the length direction of the battery cell 20, and the second through hole 217 can be arranged at the other end of the first wall 215 along the length direction of the battery cell 20.

[0158] In the embodiment of the present application, the first wall 215 is further configured to include a second through hole 217 that penetrates the first wall 215 along the thickness direction of the first wall 215, and the liquid outlet pipeline 520 is connected to the accommodating chamber 24 through the second through hole 217, so as to facilitate the communication between the liquid inlet pipeline 510, the accommodating chamber 24, the liquid outlet pipeline 520 and the thermal management component, that is, the electrolyte is circulated between the accommodating chamber 24 and the thermal management component as a heat exchange medium, effectively improving the battery device 10 in the thermal management process. The internal temperature distribution uniformity of the battery cell 20 is improved to reduce the temperature difference of the battery cell 20 in the height direction, thereby improving the heat dissipation performance of the battery device 10. Secondly, on the plane perpendicular to the thickness direction of the first wall 215, the projection of the first through hole 216 and the projection of the second through hole 217 are set to be non-overlapping, so as to reduce the mutual influence between the liquid outlet pipeline 520 and the liquid inlet pipeline 510. At the same time, the liquid outlet pipeline 520 and the liquid inlet pipeline 510 are both arranged on the first wall to facilitate the assembly of the battery device 10.

[0159] In some implementations, the liquid inlet pipeline 510 is attached to the first wall 215 at a surface close to the first wall 215 , and / or the liquid outlet pipeline 520 is attached to the first wall 215 at a surface close to the first wall 215 .

[0160] Exemplarily, at least a portion of the surface of the liquid inlet pipeline 510 close to the first wall 215 can be adhesively connected or welded to the surface of the first wall 215 away from the accommodating cavity 24, and / or, at least a portion of the surface of the liquid outlet pipeline 520 close to the first wall 215 can be adhesively connected or welded to the surface of the first wall 215 away from the accommodating cavity 24.

[0161] In the embodiment of the present application, by setting the surface of the liquid inlet pipeline 510 close to the first wall 215 to be attached to the first wall 215, and / or setting the surface of the liquid outlet pipeline 520 close to the first wall 215 to be attached to the first wall 215, the fixing effect between the battery cell 20 and the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 is improved, so as to reduce the risk of shaking or collision between the battery cell 20 and the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 under different working conditions of the battery device 10, thereby improving the performance of the battery device 10.

[0162] In some implementations, such as Figures 3 to 7 As shown, the battery cell 20 further includes a pressure relief mechanism 213 , and the pressure relief mechanism 213 is disposed on other walls of the battery cell 20 except the first wall 215 .

[0163] It should be understood that the pressure relief mechanism 213 of the embodiment of the present application refers to an element or component that is activated when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold value to release the internal pressure or temperature. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and separator in the battery cell 20.

[0164] The "actuation" mentioned in this application means that the pressure relief mechanism 213 is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 20 can be released. The action produced by the pressure relief mechanism 213 may include but is not limited to: at least a part of the pressure relief mechanism 213 is broken, shattered, torn or opened, etc. During the actuation of the pressure relief mechanism 213, the high-temperature and high-pressure substances inside the battery cell 20 will be discharged from the actuated part as emissions. In this way, the battery cell 20 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0165] The emissions from the battery cells 20 mentioned in the embodiments of the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the isolation membrane, high-temperature and high-pressure gas produced by the reaction, flames, and the like.

[0166] Exemplarily, the pressure relief mechanism 213 may be disposed on the bottom wall of the battery cell 20, for example, the pressure relief mechanism 213 may be disposed on the bottom wall of the housing 211. The pressure relief mechanism 213 may be various possible pressure relief mechanisms 213. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0167] It should also be understood that the battery cell 20 further includes a liquid injection hole (not shown in the figure), and the liquid injection hole may also be provided on other walls of the battery cell 20 except the first wall 215 .

[0168] In the embodiment of the present application, the pressure relief mechanism 213 of the battery cell 20 is arranged on other walls of the battery cell 20 except the first wall 215 to reduce the influence of the pressure relief mechanism 213 on the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 during the actuation process, so as to facilitate the normal operation of the thermal management component, thereby improving the performance of the battery device 10.

[0169] Figure 8 A cross-sectional schematic diagram of a battery device 10 provided in another embodiment of the present application is shown. Fig. 9 A cross-sectional schematic diagram of a battery device 10 provided in another embodiment of the present application is shown. Fig.10 A schematic structural diagram of a battery device 10 provided in another embodiment of the present application is shown.

[0170] In some implementations, such as Figures 8 to 10 As shown, the battery cell 20 also includes a second wall 218, which is adjacent to or opposite to the first wall 215. The second wall 218 includes a third through hole 219 that penetrates the second wall 218 along the thickness direction of the second wall 218, and the liquid outlet pipeline 520 is connected to the accommodating cavity 24 through the third through hole 219.

[0171] It should be understood that the shape of the third through hole 219 provided on the second wall 218 can be set according to actual needs, and on a plane perpendicular to the thickness direction of the second wall 218, the shape of the third through hole 219 can be circular, elliptical, polygonal, rectangular, etc. It should also be understood that the number of the third through holes 219 provided on the second wall 218 of each battery cell 20 can be set according to actual needs, for example, the second wall 218 can be provided with one or more of the third through holes 219 mentioned above.

[0172] It should also be understood that the pressure relief mechanism 213 and the liquid injection hole in the present application may be disposed on other walls of the battery cell 20 except the first wall 215 and the second wall 218 .

[0173] In the embodiment of the present application, the battery cell 20 also includes a second wall 218, and the second wall 218 is adjacent to or opposite to the first wall 215. The second wall 218 is configured to include a third through hole 219 that penetrates the second wall 218 along the thickness direction of the second wall 218, and the liquid outlet pipeline 520 is connected to the accommodating chamber 24 through the third through hole 219, that is, the liquid inlet pipeline 510 and the liquid outlet pipeline 520 are respectively arranged on the first wall 215 and the second wall 218. When the battery device 10 is in different working conditions, the risk of shaking or collision between the liquid inlet pipeline 510 and the liquid outlet pipeline 520 can be effectively reduced, thereby improving the performance of the battery device 10.

[0174] In some implementations, such as Figures 8 to 10 As shown, the second wall 218 and the first wall 215 are disposed opposite to each other along a first direction, the first direction being the height direction of the battery cell 20 , and the first wall 215 and the second wall 218 are disposed along the gravity direction.

[0175] It should be understood that the first wall 215 and the second wall 218 are arranged along the direction of gravity, which means that the first wall 215 and the second wall 218 of the battery cell 20 are arranged along the direction of gravity, that is, in the heat exchange circuit, the electrolyte can enter the accommodating cavity 24 through the first through hole 216 above the battery cell 20, and then the electrolyte flows out of the accommodating cavity 24 through the third through hole 219 below the battery cell 20, so as to facilitate the flow of the electrolyte in the heat exchange circuit.

[0176] In the embodiment of the present application, the second wall 218 and the first wall 215 are arranged relative to each other along a first direction, and the first direction is the height direction of the battery cell 20, and the first wall 215 and the second wall 218 are arranged along the gravity direction, so that the electrolyte can pass through the liquid inlet pipeline 510, the accommodating chamber 24, the liquid outlet pipeline 520 and the thermal management component in sequence under the action of gravity, thereby improving the flow rate of the electrolyte, thereby improving the heat dissipation effect of the battery device 10, and at the same time saving the driving force of the thermal management component on the electrolyte, thereby reducing the processing and manufacturing costs of the battery device 10.

[0177] In some implementations, the battery device 10 further includes a first monitoring device (not shown in the figure), which is used to monitor the composition of the electrolyte inside the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520.

[0178] It should be understood that the first monitoring device can be disposed inside the receiving cavity of the inlet pipeline 510 or the outlet pipeline 520 close to the battery cell 20 to monitor the composition change of the electrolyte inside the inlet pipeline 510 or the outlet pipeline 520. Alternatively, the first monitoring device can also be disposed at the end of the inlet pipeline 510 or the outlet pipeline 520 close to the thermal management component to monitor the composition change of the electrolyte flowing out of the inlet pipeline 510 or the outlet pipeline 520.

[0179] It should also be understood that the first monitoring device can detect changes in the composition of the electrolyte inside the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 in real time, or the first monitoring device can also detect changes in the composition of the electrolyte inside the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 at regular intervals.

[0180] It should also be understood that when the first monitoring device detects abnormal changes in the composition of the electrolyte inside the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520, for example, when the presence of dissolved gas in the electrolyte is detected, the impurity gas dissolved in the electrolyte can be discharged through the thermal management component, and then the electrolyte in the heat exchange circuit can be replenished with lithium.

[0181] In the embodiment of the present application, a first monitoring device is provided in the battery device 10, and the first monitoring device is used to monitor the composition of the electrolyte inside the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520, so that the battery device 10 can perform real-time regulation of the electrolyte flowing through the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 according to the monitoring results of the above-mentioned electrolyte composition, thereby improving the heat dissipation performance of the battery device 10.

[0182] In some implementations, such as Figures 5 to 10 As shown, the battery device 10 further includes a valve component 60, which is used to control the communication between the accommodating chamber 24 and the thermal management component.

[0183] It should be understood that the valve component 60 in the battery device 10 in the embodiment of the present application can control the connection or disconnection between the accommodating chamber 24 and the thermal management component. For example, when the valve component 60 is opened, the electrolyte in the accommodating chamber 24 can be connected to the thermal management component or flow in the direction where the thermal management component is located.

[0184] It should also be understood that the setting position of the valve component 60 can be set according to actual needs. For example, the valve component 60 can be set inside the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520, or the valve component 60 is also set in the end area where the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520 are connected to the thermal management component.

[0185] It should also be understood that the valve component 60 can be configured as at least one of the following types: a stop valve, a ball valve, a gate valve, a check valve, a regulating valve, etc. Exemplarily, the valve component 60 can be configured as a stop valve to fully open or fully close the fluid passage of the liquid inlet pipeline 510 and / or the liquid outlet pipeline 520.

[0186] In the embodiment of the present application, the battery device 10 is further provided with a valve component 60, and the valve component 60 is used to control the communication between the accommodating cavity 24 and the thermal management component, so as to control the flow or non-flow of electrolyte between the battery cell 20 and the thermal management. In the event of thermal runaway of the battery cell 20 or abnormality in the thermal management component, the valve component 60 can interrupt the connection between the accommodating cavity 24 of the battery cell 20 and the thermal management component to cut off the delivery of the electrolyte, thereby improving the performance of the battery device 10.

[0187] In some implementations, such as Figures 5 to 10 As shown, the valve component 60 includes two first valves 610, and the two first valves 610 are respectively arranged at the two ends of the liquid inlet pipeline 510 along the extension direction of the liquid inlet pipeline 510, and / or, the valve component 60 includes two second valves 620, and the two second valves 620 are respectively arranged at the two ends of the liquid outlet pipeline 520 along the extension direction of the liquid outlet pipeline 520.

[0188] It should be understood that the first valve 610 in the embodiment of the present application can be fixedly connected to the inner wall of the inlet pipeline 510, and the second valve 620 in the embodiment of the present application can be fixedly connected to the inner wall of the outlet pipeline 520. For example, the first valve 610 can be welded to the inner wall of the inlet pipeline 510, and the second valve 620 can be snap-connected to the inner wall of the outlet pipeline 520.

[0189] In the embodiment of the present application, the valve component 60 is configured to include two first valves 610, and the two first valves 610 are respectively arranged at the two ends of the liquid inlet pipeline 510 along the extension direction of the liquid inlet pipeline 510, and / or the valve component 60 is configured to include two second valves 620, and the two second valves 620 are respectively arranged at the two ends of the liquid outlet pipeline 520 along the extension direction of the liquid outlet pipeline 520, so as to control the circulation or non-circulation of the electrolyte between the battery cell 20 and the thermal management component, so that when the battery cell 20 has thermal runaway or the thermal management component has an abnormality, the valve component 60 can be used to timely interrupt the accommodating cavity 24 of the battery cell 20 and the thermal management component to cut off the transportation of the electrolyte, thereby effectively improving the performance of the battery device 10. At the same time, the configuration structure is simple, which is convenient for the processing and manufacturing of the battery device 10.

[0190] In some implementations, the battery device 10 also includes a second monitoring device (not shown in the figure), which is used to monitor at least one of the following parameters: the temperature of the battery cell 20, the voltage of the battery cell 20, and the composition of the gas inside the battery device 10. The second monitoring device is also used to control the opening or closing of the valve component 60 according to the parameters.

[0191] It should be understood that the second monitoring device can be disposed on the outer wall of the liquid inlet pipeline 510 or the liquid outlet pipeline 520 close to the battery cell 20 to monitor the temperature of the battery cell 20, the voltage of the battery cell 20 and the composition of the gas inside the battery device 10. Alternatively, the second monitoring device can also be disposed on the outer wall of the liquid inlet pipeline 510 or the liquid outlet pipeline 520 close to the end of the thermal management component.

[0192] It should also be understood that the second monitoring device can detect changes in the temperature of the battery cell 20, the voltage of the battery cell 20 and the composition of the gas inside the battery device 10 in real time, or the second monitoring device can also detect changes in the temperature of the battery cell 20, the voltage of the battery cell 20 and the composition of the gas inside the battery device 10 at regular intervals.

[0193] It should also be understood that when the second monitoring device detects that the temperature of the battery cell 20 is abnormal, the voltage of the battery cell 20 is abnormal, or the gas composition inside the battery device 10 is abnormal, the second monitoring device can control the opening or closing of the valve component 60, for example, it can further control the opening or closing of the first valve 610 and / or the second valve 620, so that the electrolyte inside the accommodating cavity 24 of the battery cell 20 is not connected to the thermal management component, that is, the circulation of the electrolyte is cut off in time, and then the vacuum pump is controlled to empty the electrolyte in the heat exchange circuit to slow down the side reaction between the negative electrode and the electrolyte, so as to slow down or reduce the occurrence of thermal runaway of the battery cell 20.

[0194] In the embodiment of the present application, a second monitoring device is provided in the battery device 10, and the second monitoring device is used to monitor at least one of the following parameters: the temperature of the battery cell 20, the voltage of the battery cell 20, and the composition of the gas inside the battery device 10. The second monitoring device is also used to control the opening or closing of the valve component 60 according to the parameter. When the second monitoring device detects that the temperature of the battery cell 20, the voltage of the battery cell 20 or the composition of the gas inside the battery device 10 is abnormal, the valve component 60 can be closed in time to disconnect the accommodating cavity 24 of the battery cell 20 from the thermal management component, so as to cut off the delivery of the electrolyte, thereby effectively improving the performance of the battery device 10.

[0195] According to some embodiments of the present application, the present application also provides an electric device, including the battery device 10 in any of the above embodiments, and the battery device 10 is used to provide electric energy for the electric device. Specifically, the electric device can be Figure 1 The vehicle 1 shown may also be any electrical device using the battery device 10 .

[0196] The power-consuming device may be any of the aforementioned devices or systems using the battery device 10 .

[0197] According to some embodiments of the present application, an energy storage device is further provided, comprising the battery device 10 in any of the above embodiments, wherein the battery device 10 is used to store electrical energy for the energy storage device.

[0198] According to some embodiments of the present application, see Figures 1 to 10 The present application provides a battery device 10, which includes: a battery cell 20, a thermal management component and a heat exchange pipeline 50, the battery cell 20 has a housing chamber 24 for housing an electrode assembly 22, the thermal management component is used to accommodate an electrolyte to adjust the temperature of the battery cell 20, and the heat exchange pipeline 50 includes an inlet pipeline 510 and an outlet pipeline 520 that are isolated from each other, and the inlet pipeline 510 and the outlet pipeline 520 are respectively connected to the thermal management component at both ends along their extension direction, wherein the inlet pipeline 510 and the outlet pipeline 520 are respectively connected to the housing chamber 24 of the battery cell 20, so that a heat exchange circuit for adjusting the temperature of the battery cell 20 is formed between the inlet pipeline 510, the housing chamber 24, the outlet pipeline 520 and the thermal management component. The battery cell 20 includes a first wall 215, and the first wall 215 includes a first through hole 216 penetrating the first wall 215 along the thickness direction of the first wall 215, and the liquid inlet pipeline 510 is connected to the accommodating cavity 24 through the first through hole 216. The first wall 215 also includes a second through hole 217 penetrating the first wall 215 along the thickness direction of the first wall 215, and the liquid outlet pipeline 520 is connected to the accommodating cavity 24 through the second through hole 217, and on a plane perpendicular to the thickness direction of the first wall 215, the projection of the first through hole 216 does not overlap with the projection of the second through hole 217. Alternatively, the battery cell 20 also includes a second wall 218, which is adjacent to or opposite to the first wall 215, and the second wall 218 includes a third through hole 219 that penetrates the second wall 218 along the thickness direction of the second wall 218, and the liquid outlet pipeline 520 is connected to the accommodating cavity 24 through the third through hole 219.

[0199] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A battery cell having a receiving cavity for receiving an electrode assembly; A thermal management component, the thermal management component is used to contain electrolyte to adjust the temperature of the battery cell; A heat exchange pipeline, comprising a liquid inlet pipeline and a liquid outlet pipeline isolated from each other, wherein both ends of the liquid inlet pipeline and the liquid outlet pipeline along their extending direction are respectively connected to the thermal management component; The liquid inlet pipeline and the liquid outlet pipeline are respectively connected to the accommodating cavity of the battery monomer, so that a heat exchange circuit for adjusting the temperature of the battery monomer is formed between the liquid inlet pipeline, the accommodating cavity, the liquid outlet pipeline and the thermal management component; The battery cell includes a first wall, the first wall includes a first through hole penetrating the first wall along a thickness direction of the first wall, and the liquid inlet pipeline is connected with the accommodating cavity through the first through hole.

2. The battery device according to claim 1, characterized in that The first wall also includes a second through hole that penetrates the first wall along the thickness direction of the first wall, and the liquid outlet pipeline is connected to the accommodating cavity through the second through hole. On a plane perpendicular to the thickness direction of the first wall, the projection of the first through hole does not overlap with the projection of the second through hole.

3. The battery device according to claim 2, characterized in that: The surface of the liquid inlet pipeline close to the first wall is attached to the first wall, and / or The liquid outlet pipeline is attached to the first wall on a surface close to the first wall.

4. The battery device according to claim 2, characterized in that: The battery cell further includes a pressure relief mechanism, and the pressure relief mechanism is disposed on other walls of the battery cell except the first wall.

5. The battery device according to claim 1, characterized in that: The battery cell further includes a second wall, which is adjacent to or opposite to the first wall. The second wall includes a third through hole penetrating the second wall along the thickness direction of the second wall. The liquid outlet pipeline is connected to the accommodating cavity through the third through hole.

6. The battery device according to claim 5, characterized in that: The second wall is disposed opposite to the first wall along a first direction, the first direction is a height direction of the battery cell, and the first wall and the second wall are disposed along a gravity direction.

7. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further comprises a first monitoring device, which is used to monitor the composition of the electrolyte inside the liquid inlet pipeline and / or the liquid outlet pipeline.

8. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further includes a valve component, which is used to control the communication between the accommodation cavity and the thermal management component.

9. The battery device according to claim 8, characterized in that: The valve component includes two first valves, and the two first valves are respectively arranged at two ends of the liquid inlet pipeline along the extending direction of the liquid inlet pipeline, and / or, The valve component includes two second valves, and the two second valves are respectively arranged at two ends of the liquid outlet pipeline along the extension direction of the liquid outlet pipeline.

10. The battery device according to claim 8, characterized in that: The battery device also includes a second monitoring device, which is used to monitor at least one of the following parameters: the temperature of the battery cell, the voltage of the battery cell, and the composition of the gas inside the battery device. The second monitoring device is also used to control the opening or closing of the valve component according to the parameters.

11. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 10, wherein the battery device is used to provide electrical energy to the electrical device.

12. An energy storage device, characterized in that: include: The battery device according to any one of claims 1 to 10, wherein the battery device is used to store electrical energy for the energy storage device.

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