Battery device and electric appliance

Abstract

The application relates to the technical field of batteries, in particular to a battery device and an electric equipment. The battery device comprises a box body, a heat preservation assembly, a heat pipe and at least two battery monomers. The box body comprises a containing cavity and a ventilation opening, the ventilation opening is communicated with the containing cavity and the external atmosphere; the at least two battery monomers are arranged in the containing cavity; the heat preservation assembly is connected with the box body, and the heat preservation assembly realizes the state of closing or opening the ventilation opening through rotating, folding or sliding; at least part of the heat pipe is arranged in the containing cavity, a first section of the heat pipe is connected with the at least two battery monomers, and a second section of the heat pipe is arranged in the ventilation opening; wherein when the heat preservation assembly is in the closed state, the heat preservation assembly blocks the heat exchange between the second section and the external atmosphere. The heat pipe has good heat conductivity and temperature uniformity, and in combination with the heat preservation assembly opening or closing the ventilation opening, the heat dissipation and heat preservation requirements of the battery monomers can be met to a certain extent, so that the battery monomers work at a suitable temperature.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device and an electrical appliance. Background Technology

[0002] Battery devices can be used to store or provide electrical energy, and they can be used in electrical equipment, such as vehicles. Taking vehicles as an example, in a vehicle equipped with a battery device, the battery device can provide all or part of the power.

[0003] During use, the temperature of the individual battery cells in a battery device rises, necessitating temperature control to prevent adverse effects on the device's performance and lifespan. Therefore, regulating the temperature of individual battery cells has become an important research direction in this field. Utility Model Content

[0004] This application provides a battery device and an electrical appliance. The heat pipe has good thermal conductivity and temperature uniformity. Combined with the opening or closing of the ventilation opening by the heat insulation component, it can meet the heat dissipation and heat preservation requirements of the battery cell to a certain extent, so that the battery cell can work at a suitable temperature.

[0005] The technical solution of this application embodiment is implemented as follows:

[0006] This application provides a battery device, the battery device comprising:

[0007] The enclosure includes a receiving cavity and a vent, the vent connecting the receiving cavity to the outside atmosphere;

[0008] At least two battery cells are disposed within the receiving cavity;

[0009] A thermal insulation component is connected to the housing, and the thermal insulation component can close or open the ventilation opening by rotating, folding or sliding.

[0010] A heat pipe, at least a portion of which is disposed within the receiving cavity, a first section of which is connected to the at least two battery cells, and a second section of which is disposed at the vent.

[0011] When the insulation component is in the closed state, it blocks the heat exchange between the second section and the outside atmosphere.

[0012] The battery device provided in this application embodiment has a heat pipe whose first section is connected to at least two battery cells, and a heat pipe whose second section is located at a vent. One of the battery cells and the internal environment of the housing cavity serves as a heat source, and the other as a cold source. The heat pipe utilizes the phase change process of the heat transfer medium to achieve heat conduction between the internal environment of the housing cavity and the battery cells. The heat transfer of the heat pipe is reversible. When the battery cell acts as a heat source and needs to dissipate heat, the second section of the heat pipe is a condensation section, and the first section is an evaporation section. The insulation component can be in an open state, and the heat from the battery cell is conducted to the internal environment of the housing cavity through the heat pipe. The housing cavity can exchange airflow with the outside atmosphere, thereby quickly removing the heat from the second section and achieving heat dissipation for the battery cell. When the battery cell acts as a cold source and needs to absorb heat, the second section of the heat pipe is an evaporation section, and the first section is a condensation section. The insulation component can be in a closed state, reducing airflow exchange between the housing cavity and the outside atmosphere, thereby reducing heat loss within the housing cavity and achieving heat preservation for the battery cell. The heat pipe has a self-sealing structure, eliminating the need for end-users to add coolant inside. Therefore, it avoids the coolant mixing issues present in related technologies. Furthermore, the heat pipe possesses excellent thermal conductivity and temperature uniformity. Combined with the opening and closing of the ventilation openings by the insulation components, it can meet the heat dissipation and insulation requirements of the individual battery cells to a certain extent, allowing the battery cells to operate at a suitable temperature.

[0013] In some embodiments, the battery device includes:

[0014] The controller is located within the enclosure;

[0015] A drive assembly is disposed in the housing. The drive assembly is electrically connected to the controller and is drively connected to the insulation assembly. The controller controls the drive assembly to drive the insulation assembly to switch between the closed state and the open state.

[0016] In this embodiment, the insulation component automatically switches between the closed and open states through a controller and drive components, without the need for manual intervention, thereby improving the degree of automation and ease of use.

[0017] In some embodiments, the battery device includes:

[0018] A temperature sensor is disposed within the receiving cavity. The temperature sensor is used to acquire the temperature of the receiving cavity. The controller controls the drive assembly based on the acquired temperature.

[0019] In this embodiment, the temperature detection device can acquire the detection temperature of the cavity in real time. The controller controls the drive component to drive the insulation component to move according to the detection temperature. In this way, the state of the insulation component can be automatically adjusted according to the actual temperature inside the cavity, thereby improving the stability and reliability of the equipment operation.

[0020] In some embodiments, the insulation component includes a temperature regulating element electrically connected to the controller, the temperature regulating element being capable of generating and / or absorbing heat.

[0021] In this embodiment, the temperature regulating element can provide at least one function of generating heat and absorbing heat, thereby providing at least one function of heating and cooling. The temperature regulating element is electrically connected to the controller and can realize the temperature increase or decrease under the control of the controller. It can flexibly adjust the temperature according to actual needs. When the battery cell needs to be heated, the controller controls the temperature regulating element to generate heat. When the battery cell needs to be cooled, the controller controls the temperature regulating element to absorb heat, thus meeting diverse usage scenarios.

[0022] In some embodiments, the controller is configured to control the heat preservation component to switch to the off state and control the temperature regulating component to heat up when the detected temperature is lower than the preset value and continues for a first preset duration; the controller is configured to control the heat preservation component to switch to the on state and control the temperature regulating component to stop heating when the detected temperature reaches the preset value and continues for a second preset duration.

[0023] In this embodiment, by employing a single preset value trigger and a delayed reset logic for control, frequent operation of the insulation component caused by small temperature fluctuations can be avoided to a certain extent. When the internal temperature of the cavity is lower than the preset value, the insulation component is turned off and the temperature regulating element is activated to reduce heat loss and improve heating efficiency. After the preset value is reached, the insulation component is turned on and heating is stopped, which can reduce energy consumption, avoid overheating, and achieve energy-saving and safe temperature control.

[0024] In some embodiments, the terminal of the battery cell faces the side in the first direction, and the temperature detection element is disposed on the side wall of the receiving cavity along the second direction, where the first direction and the second direction intersect.

[0025] In this embodiment, during the operation of the battery cell, the temperature of the terminal post is relatively high, which is one of the main heat sources. The temperature detection device is set on the side of the battery cell facing the first direction of the terminal post, and the temperature detection device is located on the side wall of the receiving cavity along the second direction. The distance between the temperature detection device and the terminal post is relatively far, which can avoid temperature acquisition deviation of the temperature detection device to a certain extent.

[0026] In some embodiments, the battery device includes a limit switch, the insulation component includes a flexible insulation element, one end of the flexible insulation element in the third direction is fixedly connected to the housing, and the other end of the flexible insulation element in the third direction is a movable end, which has an unfolded position for closing the vent and a folded position for opening the vent in the third direction.

[0027] When the movable end moves to one of the unfolded position and the folded position, it triggers the limit switch and generates a limit signal. The controller then controls the drive component to stop operating based on the limit signal.

[0028] In this embodiment, one end of the flexible insulation component is fixed to the box body, and the other end is a movable end. The movable end can move between the unfolded position and the folded position along a third direction to close and open the ventilation opening. At the same time, the position status of the movable end is detected in real time by a limit switch and a feedback signal is sent to the controller. When the movable end moves to the unfolded position or the folded position, the limit switch is triggered and a limit signal is generated. The controller controls the drive component to stop running according to the limit signal, thereby limiting the movement stroke of the movable end and reducing the risk of the movable end overtravel.

[0029] In some embodiments, the first section of the heat pipe is connected to the lower end of the battery cell along the direction of gravity.

[0030] In this embodiment, the lower end of the battery cell along the direction of gravity is the end of the battery cell closer to the ground along the direction of gravity. The first section of the heat pipe is connected to the lower end of the battery cell along the direction of gravity, and the first section of the heat pipe can bear the weight of the battery cell.

[0031] In some embodiments, the insulation component includes a flexible insulation element that can be unfolded or folded along a third direction; in the closed state, the flexible insulation element unfolds to close the vent; in the open state, the flexible insulation element folds to open the vent.

[0032] In this embodiment, the flexible insulation component can be unfolded along a third direction to increase the area and cover the ventilation opening, thereby closing the ventilation opening; the flexible insulation component can be folded along a third direction to reduce the area and avoid the ventilation opening, thereby opening the ventilation opening.

[0033] In some embodiments, the thermal insulation component includes a temperature regulating element disposed on the flexible thermal insulation member, the temperature regulating element being capable of generating heat and / or absorbing heat.

[0034] In this embodiment, the temperature regulating element can provide at least one function of generating heat and absorbing heat, thereby providing at least one function of heating and cooling.

[0035] In some embodiments, the temperature regulating element includes at least one of a flexible heating film and a heating wire.

[0036] In this embodiment, the flexible heating film is a flexible electric heating element that can be bent and heats in a planar manner, and the heating wire is a metal wire that heats up through resistance when energized. Both the flexible heating film and the heating wire can convert electrical energy into heat energy, thereby generating heat.

[0037] In some embodiments, the temperature regulating element is disposed on the side of the flexible insulation element near the receiving cavity.

[0038] In this embodiment, the temperature regulating element is located inside the flexible insulation element, and the temperature regulating element is closer to the heat pipe, which makes it easier for the temperature regulating element to release heat to the second section of the heat pipe or absorb heat from the heat pipe more quickly.

[0039] In some embodiments, the battery device includes a temperature control switch electrically connected to the temperature regulating element.

[0040] In this embodiment, the temperature control switch is connected in series with the temperature regulating component. The temperature control is used to control the on / off state of the temperature regulating component, which can quickly respond to the power-on heating and power-off protection of the temperature regulating component, and prevent the temperature regulating component from overheating.

[0041] In some embodiments, the insulation component includes a flame-retardant layer, and at least a portion of the surface of the flexible insulation element is provided with the flame-retardant layer.

[0042] In this embodiment, a flame-retardant layer is provided on the insulation component, which can block heat and / or flame from directly acting on the flexible insulation component to a certain extent, inhibit the spread of flame, reduce the combustion rate, and reduce the risk of the flexible insulation component burning or being damaged due to heat.

[0043] In some embodiments, the flame-retardant layer is disposed on the side of the flexible insulation member opposite to the receiving cavity.

[0044] In this embodiment, the flame-retardant layer is disposed on the side of the flexible insulation component away from the receiving cavity, which can block the influence of flames or high temperatures outside the box on the flexible insulation component.

[0045] In some embodiments, the enclosure includes at least two ventilation openings, each of which is provided with an insulation component.

[0046] In this embodiment, each vent is equipped with a heat insulation component, and the opening and closing status of the corresponding vent can be flexibly adjusted according to usage requirements, thereby enhancing the flexibility and applicability of use.

[0047] This application provides an electrical device including any of the battery devices described above.

[0048] The electrical equipment provided in the embodiments of this application includes the battery device in any embodiment of this application, and has the same or corresponding beneficial effects as the battery device. Attached Figure Description

[0049] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application;

[0050] Figure 2This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0051] Figure 3 yes Figure 2 A schematic diagram of part of the structure of the battery device;

[0052] Figure 4 These are schematic diagrams of the battery cell, heat pipe, and insulation component provided in some embodiments of this application;

[0053] Figure 5 yes Figure 3 Another perspective of the diagram, in which some battery cells connected to the heat pipe are omitted;

[0054] Figure 6 These are schematic diagrams of the battery cell and heat pipe provided in some embodiments of this application;

[0055] Figure 7 These are schematic diagrams of the battery device provided in other embodiments of this application;

[0056] Figure 8 yes Figure 7 A schematic diagram of the battery cell and heat pipe structure of the battery device.

[0057] Explanation of reference numerals in the attached figures

[0058] 1000, Vehicle; 100, Battery Unit; 200, Control Unit; 300, Motor; 1, Housing; 1a, Receiving Chamber; 1b, Ventilation Opening; 2, Battery Cell; 21, Terminal Post; 3, Insulation Component; 31, Flexible Insulation Component; 4, Heat Pipe; 41, First Section; 42, Second Section; 5, Temperature Detection Component; 6, Controller; X, First Direction; Y, Second Direction; Z, Third Direction. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, embodiments of the technical solutions of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of this application more clearly, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0061] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0062] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that combinations can be made in any suitable manner without contradiction; for example, different combinations of specific technical features / embodiments can form different implementations. To avoid unnecessary repetition, the various possible combinations of specific technical features / embodiments in this application will not be described separately.

[0063] It should be noted that in this application, "multiple" refers to two or more items. "At least two" refers to two or more items. "Multiple types" refers to two or more items. "Multi-layered" refers to two or more layers.

[0064] Please see Figures 1 to 3 To facilitate understanding of the battery device 100 and electrical equipment provided in the embodiments of this application, some basic structures of the battery cell 2, battery device 100 and electrical equipment provided in the embodiments of this application will be introduced first.

[0065] In this embodiment of the application, the battery cell 2 can be a secondary battery, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.

[0066] The battery cell 2 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0067] A battery cell 2 typically includes an electrode assembly, which comprises a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell 2, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits between the electrodes while allowing active ions to pass through.

[0068] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0069] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0070] As an example, the positive current collector can be made of metal foil, conductive polymer material, carbon material, or composite current collector. For example, as a metal foil, pure metal, alloy, or surface-treated metal can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. Composite current collectors may include a polymer material base layer and a metal layer. Composite current collectors can 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.).

[0071] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium manganese iron phosphate, and lithium manganese iron phosphate and carbon composites.

[0072] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0073] As an example, the negative current collector can be made of metal foil, conductive polymer material, carbon material, or composite current collector. For example, as a metal foil, pure metal, alloy, or surface-treated metal can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. Composite current collectors may include a polymer material base layer and a metal layer. Composite current collectors can 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.).

[0074] As an example, the negative electrode sheet may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0075] As an example, the negative current collector has two surfaces opposite each other in its own thickness direction, and the negative active material is disposed on either or both of the two opposite surfaces of the negative current collector.

[0076] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cell 2. 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, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cell 2 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0077] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0078] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0079] 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 particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0080] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0081] In some embodiments, the battery cell 2 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0082] Liquid electrolytes include electrolyte salts and solvents.

[0083] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0084] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0085] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell 2, such as additives that improve the overcharge / fast charge performance of the battery cell 2, additives that improve the high-temperature performance of the battery cell 2, additives that improve the low-temperature performance of the battery cell 2, etc.

[0086] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0087] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0088] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0089] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0090] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0091] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0092] In some embodiments, the electrode assembly has a stacked structure.

[0093] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0094] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0095] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0096] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0097] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0098] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal, etc.

[0099] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0100] In some embodiments, the battery cell 2 may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly for encapsulating the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating structure or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0101] As an example, the battery cell 2 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells. Multi-prismatic battery cells are, for example, hexagonal prismatic battery cells. This application does not have any particular limitations.

[0102] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0103] In some embodiments, at least one terminal post 21 is provided on the housing, and the terminal post 21 is electrically connected to the tab. The terminal post 21 can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The terminal post 21 can be provided on the end cap or on the housing.

[0104] In some embodiments, a pressure relief mechanism is provided on the outer casing. The pressure relief mechanism is used to release the internal gas of the battery cell 2.

[0105] As an example, the internal pressure or temperature of battery cell 2 is actuated to release the internal pressure or temperature when it reaches a predetermined preset value. When the internal pressure or temperature of battery cell 2 reaches the predetermined preset value, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is destroyed, thereby forming an opening or medium flow channel for the release of internal pressure or temperature. The preset value is designed differently depending on the design requirements. The preset value may depend on one or more of the materials of the positive electrode, negative electrode, electrolyte, and separator in battery cell 2.

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

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

[0108] The term "actuation" as used in this application refers to the pressure relief mechanism being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 2. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the pressure relief mechanism to form a venting medium flow channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature, high-pressure substances inside the battery cell 2 are discharged outwards from the actuated portion as exhaust materials. This method enables the battery cell 2 to release pressure and temperature under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0109] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell 2.

[0110] The emissions from battery cell 2 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0111] The battery device 100 provided in this application includes the battery cell 2 in any one embodiment of this application.

[0112] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 2.

[0113] Multiple battery cells 2 can be connected in series, parallel, or mixed via a busbar. The busbar is used to achieve electrical connection between at least two battery cells 2.

[0114] For example, "hybrid connection" refers to at least two battery cells 2 being connected in both series and parallel. At least two battery cells 2 can be directly connected in series, parallel, or hybrid connections; of course, at least two battery cells 2 can also be first connected in series, parallel, or hybrid connections to form a module, and the module can then be connected in series, parallel, or hybrid connections to form a whole.

[0115] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 2.

[0116] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 2 together to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells 2 together with cable ties.

[0117] In some embodiments, the battery device 100 may be a battery pack.

[0118] This application provides an electrical device, which includes a battery device 100 as described in any embodiment of this application. The battery device 100 is used to store or provide electrical energy.

[0119] Electrical equipment includes, but is not limited to, energy storage devices, mobile phones, tablets, laptops, electric toys, power tools, vehicles, ships, robots, or spacecraft. Vehicles can include electric bicycles and electric cars; electric toys can include electric bicycle toys and electric car toys, etc., including stationary or mobile electric toys such as game consoles, electric car toys, electric boat toys, and electric airplane toys; and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0120] Energy storage devices include, but are not limited to, energy storage containers or energy storage cabinets.

[0121] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows, with reference to the accompanying drawings.

[0122] Figure 1 The diagram illustrates the structure of a vehicle 1000 as provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Figure 1As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a control device 200 and a motor 300. The control device 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0123] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0124] In related technologies, water-cooled plates are used to exchange heat between battery cells. Coolant enters the water-cooled plate, exchanges heat with the battery cells, and then exits the water-cooled plate. The coolant can continuously circulate in and out of the water-cooled plate to achieve heat exchange between the battery cells. However, this liquid cooling solution always carries the unpredictable corrosion risk caused by mixing different types of coolant. For example, vehicle manufacturers cannot effectively restrict end customers from adding coolant themselves. Currently, different types of coolant on the market pose a risk of corrosion to the water-cooled plate when mixed. Once the water-cooled plate experiences internal corrosion, coolant leaks into the battery device, causing insulation failure inside the battery device, which will greatly reduce the battery device's lifespan and safety.

[0125] In view of this, this application provides a battery device, which includes a housing, an insulation component, a heat pipe, and at least two battery cells. The housing includes a receiving cavity and a vent, the vent connecting the receiving cavity to the outside atmosphere; at least two battery cells are disposed within the receiving cavity; the insulation component is connected to the housing, and the insulation component can close or open the vent by rotating, folding, or sliding; at least a portion of the heat pipe is disposed within the receiving cavity, a first segment of the heat pipe is connected to at least two battery cells, and a second segment of the heat pipe is disposed at the vent; wherein, when the insulation component is in the closed state, the insulation component blocks heat exchange between the second segment and the outside atmosphere.

[0126] The battery device provided in this application embodiment has a heat pipe whose first section is connected to at least two battery cells, and a heat pipe whose second section is located at a vent. One of the battery cells and the internal environment of the housing cavity serves as a heat source, and the other as a cold source. The heat pipe utilizes the phase change process of the heat transfer medium to achieve heat conduction between the internal environment of the housing cavity and the battery cells. The heat transfer of the heat pipe is reversible. When the battery cell acts as a heat source and needs to dissipate heat, the second section of the heat pipe is a condensation section, and the first section is an evaporation section. The insulation component can be in an open state, and the heat from the battery cell is conducted to the internal environment of the housing cavity through the heat pipe. The housing cavity can exchange airflow with the outside atmosphere, thereby quickly removing the heat from the second section and achieving heat dissipation for the battery cell. When the battery cell acts as a cold source and needs to absorb heat, the second section of the heat pipe is an evaporation section, and the first section is a condensation section. The insulation component can be in a closed state, reducing airflow exchange between the housing cavity and the outside atmosphere, thereby reducing heat loss within the housing cavity and achieving heat preservation for the battery cell. The heat pipe has a self-sealing structure, eliminating the need for end-users to add coolant inside. Therefore, it avoids the coolant mixing issues present in related technologies. Furthermore, the heat pipe possesses excellent thermal conductivity and temperature uniformity. Combined with the opening and closing of the ventilation openings by the insulation components, it can meet the heat dissipation and insulation requirements of the individual battery cells to a certain extent, allowing the battery cells to operate at a suitable temperature.

[0127] The battery device 100 provided in the embodiments of this application is further described below with reference to the accompanying drawings. Please refer to the accompanying drawings. Figures 2 to 6 This application provides a battery device 100, which includes a housing 1, a heat insulation component 3, a heat pipe 4, and at least two battery cells 2. The housing 1 includes a receiving cavity 1a and a vent 1b, the vent 1b connecting the receiving cavity 1a to the outside atmosphere; at least two battery cells 2 are disposed in the receiving cavity 1a; the heat insulation component 3 is connected to the housing 1, and the heat insulation component 3 can close or open the vent 1b by rotating, folding, or sliding; at least a portion of the heat pipe 4 is disposed in the receiving cavity 1a, the first segment 41 of the heat pipe 4 is connected to at least two battery cells 2, and the second segment 42 of the heat pipe 4 is disposed in the vent 1b; wherein, when the heat insulation component 3 is in the closed state, the heat insulation component 3 blocks the heat exchange between the second segment 42 and the outside atmosphere.

[0128] The housing 1 is used to hold the battery cell 2, heat pipe 4 and other structural components, and to protect the battery cell 2, heat pipe 4 and other structural components, and to a certain extent prevent foreign objects outside the housing 1 from affecting the charging or discharging of the battery cell 2.

[0129] The thermal insulation component 3 has a closed state that can close the vent 1b and an open state that can open the vent 1b.

[0130] In some embodiments, the insulation component 3 switches between a closed state and an open state by rotation. For example, the insulation component 3 can be rotatably connected to the housing 1, thereby changing the posture of the insulation component 3 relative to the vent 1b, thus opening or closing the vent 1b.

[0131] In some embodiments, the insulation component 3 switches between a closed state and an open state by folding. For example, the insulation component 3 can change its area by unfolding and folding, thereby changing the size of the area of ​​the ventilation opening 1b that the insulation component 3 blocks, thus opening or closing the ventilation opening 1b.

[0132] In some embodiments, the insulation component 3 switches between a closed state and an open state by sliding. For example, the insulation component 3 can be slidably connected to the housing 1, thereby changing the size of the area of ​​the ventilation opening 1b blocked by the insulation component 3, thus opening or closing the ventilation opening 1b.

[0133] In some embodiments, part of the structure of the heat pipe 4 is disposed within the receiving cavity 1a, while another part of the structure of the heat pipe 4 is not located in the receiving cavity 1a. For example, the other part of the structure of the heat pipe 4 may be located in other cavities of the housing 1 or outside the housing 1.

[0134] In some embodiments, the entire structure of the heat pipe 4 may be housed within the receiving cavity 1a.

[0135] The first section 41 of the heat pipe 4 is disposed in the receiving cavity 1a and connected to at least two battery cells 2. In this way, the first section 41 can absorb the heat generated by the battery cells 2 or transfer heat to the battery cells 2.

[0136] The second section 42 of the heat pipe 4 is disposed in the receiving cavity 1a and located at the vent 1b, so that the second section 42 can exchange heat with the outside atmosphere through the vent 1b.

[0137] Heat pipe 4 is a heat transfer device that uses the phase change (evaporation and condensation) of the internal heat transfer medium to achieve heat transfer. Specifically, heat pipe 4 contains a heat transfer medium that can undergo phase change within the heat pipe 4, that is, the latent heat of vaporization and latent heat of condensation of the heat transfer medium are used to achieve rapid heat transfer.

[0138] The working principle of heat pipe 4 is as follows: When there is a temperature difference between the condensation section and the evaporation section of heat pipe 4, the self-circulation function inside heat pipe 4 is triggered. The part of heat pipe 4 connected to the heat source is the evaporation section, and the part of heat pipe 4 connected to the cold source is the condensation section. The heat transfer medium in the evaporation section absorbs heat and evaporates into a gaseous state. The gaseous heat transfer medium flows to the condensation section under the action of pressure difference, where the cold source carries away the heat and condenses it into a liquid state. The liquid heat transfer medium flows back to the evaporation section, and this cycle repeats, continuously transferring the heat from the heat source to the cold source. Heat pipe 4 has good temperature uniformity. In this application, one of the internal environment of the containment cavity 1a and the battery cell 2 is the heat source, and the other is the cold source. That is, one of the first section 41 and the second section 42 serves as the evaporation section, and the other serves as the condensation section.

[0139] Heat pipe 4 boasts high thermal conductivity: It achieves extremely high thermal conductivity, far exceeding that of traditional metallic heat-conducting materials such as copper or aluminum. This is because the heat transfer medium inside heat pipe 4 can rapidly transfer heat during evaporation and condensation. Heat pipe 4 also offers the advantage of low thermal resistance: Its very low thermal resistance means it can transfer a large amount of heat with a small temperature difference, which is crucial for applications requiring efficient heat dissipation. Heat pipe 4 is also flexible: It can be designed into various shapes to adapt to different application requirements. This flexibility allows it to be used in space-constrained or complex-shaped devices. Heat pipe 4 exhibits automatic temperature equalization: The heat transfer medium inside heat pipe 4 automatically adjusts the heat distribution during evaporation and condensation, making the temperature at both ends of heat pipe 4 tend to be uniform, thus achieving uniform heat dissipation. Heat pipe 4 has a wide operating temperature range: Depending on the heat transfer medium used, heat pipe 4 can operate over a wide temperature range, from low to high temperatures. Heat pipe 4 has high reliability: Once started, heat pipe 4 can operate stably for extended periods with low maintenance requirements. In addition, due to the simple internal structure of heat pipe 4, the failure rate is relatively low.

[0140] During the charging and discharging process of the battery device 100, the battery cell 2 will generate heat due to its own impedance, especially when the charge / discharge rate of the battery cell 2 is large, the battery cell 2 will generate a lot of heat; when the battery cells 2 are piled up, the heat cannot be dissipated quickly; therefore, the heat pipe 4 is required to provide heat dissipation function; if the ambient temperature outside the housing 1 is too low, for example, if the ambient temperature is lower than the operating temperature of the battery cell 2, if the vent 1b is open to the ambient temperature, the low temperature outside will be transferred to the battery cell 2, causing the temperature of the battery cell 2 to be too low, the discharge rate will be limited, and the driving speed of the whole vehicle will be affected.

[0141] The insulation component 3 provides at least a thermal insulation function. When the ambient temperature outside the enclosure 1 is too low, the insulation component 3 is in the closed state, closing the vent 1b. This reduces airflow between the containment cavity 1a and the outside atmosphere, thereby reducing heat exchange between the second section 42 of the heat pipe 4 and the outside atmosphere, thus achieving a thermal insulation effect. When the ambient temperature outside the enclosure 1 is suitable, for example, around 25°C, the insulation component 3 can be in the open state. This opens the vent 1b, increasing airflow between the containment cavity 1a and the outside atmosphere, thereby increasing heat exchange between the second section 42 of the heat pipe 4 and the outside atmosphere, thus achieving a heat dissipation effect.

[0142] When the battery cell 2 is used as a heat source and needs to dissipate heat, the second section 42 of the heat pipe 4 is the condensation section, the first section 41 of the heat pipe 4 is the evaporation section, the heat insulation component 3 can be in the open state, the heat of the battery cell 2 is conducted to the internal environment of the containment cavity 1a through the heat pipe 4, the containment cavity 1a can exchange airflow with the outside atmosphere, thereby quickly removing the heat of the second section 42 and realizing the heat dissipation of the battery cell 2.

[0143] When the battery cell 2 needs to absorb heat as a cold source, the second section 42 of the heat pipe 4 is the evaporation section, the first section 41 of the heat pipe 4 is the condensation section, and the heat insulation component 3 can be in a closed state to reduce the airflow exchange between the containment cavity 1a and the outside atmosphere, thereby reducing the heat loss in the containment cavity 1a and achieving heat insulation of the battery cell 2.

[0144] The battery device 100 provided in this embodiment of the application has a first section 41 of a heat pipe 4 connected to at least two battery cells 2, and a second section 42 of the heat pipe 4 disposed at a vent 1b. One of the battery cells 2 and the internal environment of the housing cavity 1a serves as a heat source, and the other as a cold source. The heat pipe 4 utilizes the phase change process of the heat transfer medium to achieve heat conduction between the internal environment of the housing cavity 1a and the battery cells 2. The heat transfer of the heat pipe 4 is reversible. When the battery cells 2, as the heat source, need to dissipate heat, the second section 42 of the heat pipe 4 becomes a condensation section, and the first section 41 of the heat pipe 4 becomes an evaporation section. A heat insulation component is also included. The insulation component 3 can be in the open state. The heat from the battery cell 2 is conducted to the internal environment of the housing cavity 1a through the heat pipe 4. The housing cavity 1a can exchange airflow with the outside atmosphere, thereby quickly removing the heat from the second section 42 and achieving heat dissipation for the battery cell 2. When the battery cell 2 needs to absorb heat as a cold source, the second section 42 of the heat pipe 4 is the evaporation section, and the first section 41 of the heat pipe 4 is the condensation section. The insulation component 3 can be in the closed state to reduce airflow exchange between the housing cavity 1a and the outside atmosphere, thereby reducing heat loss within the housing cavity 1a and achieving heat preservation for the battery cell 2. The heat pipe 4 is a self-sealing structure, which does not involve scenarios where end customers add coolant to the heat pipe 4 themselves. Therefore, it does not bring about the problem of coolant mixing in related technologies. Moreover, the heat pipe 4 has good thermal conductivity and temperature uniformity. Combined with the opening or closing of the vent 1b by the insulation component 3, it can meet the heat dissipation and heat preservation requirements of the battery cell 2 to a certain extent, allowing the battery cell 2 to operate at a suitable temperature.

[0145] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 3 The first box body is not shown. Box 1 includes a first box body and a second box body with an opening. The first box body closes the opening of the second box body to jointly define a receiving cavity 1a.

[0146] As an example, at least two battery cells 2 can be battery modules, and at least two battery cells 2 can be housed in the housing 1 by fixing the battery modules into the housing 1. Alternatively, multiple battery cells 2 can be housed in the housing 1 by directly fixing them into the housing 1.

[0147] In some embodiments, the housing 1 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 1 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 1 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0148] The shape of the box 1 is not limited. For example, the box 1 can be a simple three-dimensional structure such as a single hexahedron, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as hexahedrons, cylinders, or spheres. In one example, the box 1 can be a cuboid shape, with both its length and width directions parallel to the horizontal plane, and its length direction parallel to the longest side of the cuboid.

[0149] The material of the enclosure 1 is not limited. For example, the material of the enclosure 1 can be metal materials such as aluminum alloy or iron alloy, or polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0150] In some embodiments, a portion of the solid structure of the side wall of the housing 1 is missing to form a vent 1b, and with the plane where the vent 1b is located as the projection plane, at least a portion of the projection of the second segment 42 of the heat pipe 4 overlaps with the projection of the vent 1b.

[0151] In some embodiments, the inner wall of the heat pipe 4 can form a capillary structure, and the capillary force generated by the capillary structure causes the liquid heat transfer medium to move.

[0152] In this embodiment, the gaseous heat transfer medium flows through the middle region inside the heat pipe 4 to the condensation section under the action of pressure difference. The heat is taken away by the cold source and condenses into liquid. The liquid heat transfer medium flows back to the evaporation section along the inner wall of the heat pipe 4 under the capillary action of the capillary structure. This cycle is repeated to continuously transfer the heat from the heat source to the cold source.

[0153] The form of the capillary structure is not limited, and the capillary structure may include at least one of grooves, wire mesh, sintered powder metal, and fibers. The liquid heat transfer medium flows under the capillary action of at least one of the grooves, wire mesh, sintered powder metal, and fibers.

[0154] It should be noted that the specific type of heat transfer medium can be selected according to requirements. The heat transfer medium is a flowable fluid, and includes, but is not limited to, pure water, ethanol, or methanol. The type of heat transfer medium can be selected based on the required temperature.

[0155] The connection method between the first segment 41 of the heat pipe 4 and the battery cell 2 is not limited. For example, the first segment 41 of the heat pipe 4 and the battery cell 2 can be connected in a non-detachable or detachable manner. For example, the first segment 41 of the heat pipe 4 and the battery cell 2 can be connected in at least one of welding, bonding and abutting.

[0156] In some embodiments, the heat pipe 4 can be connected to the battery cell 2 via a thermally conductive structure. The thermally conductive structure includes, but is not limited to, one or more of a thermal pad, thermal grease, and thermally conductive structural adhesive. This results in low contact thermal resistance between the heat pipe 4 and the battery cell 2.

[0157] In some embodiments, when the insulation component 3 is in the off state, the heat pipe 4 and the insulation component 3 may be in contact with each other or spaced apart.

[0158] In some embodiments, a portion of the heat pipe 4 can be connected to the side wall of the housing 1, allowing heat exchange between the housing 1 and the external environment. For example, the housing 1 is maintained at a low temperature, while the temperature of the battery cell 2 is higher than that of the housing 1. The first section 41 of the heat pipe 4 is in an evaporating state, continuously transferring the heat generated by the battery cell 2 to the housing 1. Then, through the interaction between the housing 1 and the external environment, the heat is dissipated to the external environment. Through this continuous cycle, the temperature of the battery cell 2 is maintained within a stable, small range.

[0159] In some embodiments, the contact surfaces of the heat pipe 4 and the sidewall of the housing 1 are sufficiently smooth, and a portion of the structure of the heat pipe 4 can also be in rigid contact with the sidewall of the housing 1.

[0160] In some embodiments, the heat pipe 4 may not be connected to the side wall of the housing 1. That is, the heat pipe 4 does not contact the housing 1.

[0161] In some embodiments, the outer surface of the heat pipe 4 may have an insulating layer. This improves the safety of the interface between the heat pipe 4 and the battery cell 2.

[0162] In some embodiments, the outer surface of the heat pipe 4 may be insulated, such as by an insulating coating, an external insulating sleeve, or an insulating film. Insulating materials, such as silicone and / or epoxy resin, may also be added between the heat pipe 4 and the battery cell 2.

[0163] In some embodiments, the insulation component 3 can be manually driven to switch between an open state and a closed state.

[0164] In some embodiments, please refer to Figure 5 The battery device 100 includes a controller 6 and a drive assembly. The controller 6 is located in the housing 1. The drive assembly is located in the housing 1 and is electrically connected to the controller 6. The drive assembly is also connected to the insulation assembly 3 via transmission. The controller 6 controls the drive assembly to drive the insulation assembly 3 to switch between a closed state and an open state.

[0165] Controller 6 is a structure with control circuitry, and it can be used to control the operation of at least one electronically controlled device. An electronically controlled device is a device whose operation is controlled by electrical signals.

[0166] Electrical connection refers to the electrical connection between components through conductive means, forming a connection relationship that can transmit electrical energy or electrical signals. Electrical connection includes, but is not limited to, wired connection or wireless connection through conductive lines.

[0167] The transmission connection between the drive component and the insulation component 3 refers to the connection method between the drive component and the insulation component 3 that enables the transmission of power and the realization of relative movement or position adjustment.

[0168] In this embodiment, the heat preservation component 3 is automatically switched between the closed and open states by the controller 6 and the drive component, without the need for manual intervention, thus improving the degree of automation and ease of use.

[0169] The controller 6 can be disposed inside the housing 1. For example, the housing 1 includes an electrical control cavity, and the controller 6 can be disposed inside the electrical control cavity. Of course, the controller 6 can also be disposed in a receiving cavity 1a.

[0170] The controller 6 can be located outside the housing 1. For example, the battery device 100 includes a protective cover located outside the housing 1 and connected to the housing 1, with the controller 6 located inside the protective cover. The protective cover can reduce the risk of dust and water stains outside the housing 1 coming into contact with the controller 6, making it suitable for outdoor or harsh environments.

[0171] The connection method between the controller 6 and the housing 1 is not limited. For example, the controller 6 can be detachably or non-detachably connected to the housing 1.

[0172] Unless otherwise stated, in the embodiments of this application, non-detachable connections include, but are not limited to, at least one of welding, bonding, and riveting. Detachable connections include, but are not limited to, at least one of screw connections, bolt connections, and snap-fit ​​connections.

[0173] The drive assembly can be housed within the housing 1. For example, a portion of the drive assembly is located within the receiving cavity 1a, and another portion is located within the electrical control cavity. Of course, the entire structure of the drive assembly can also be housed within the receiving cavity 1a.

[0174] The drive component can be located outside the housing 1. For example, at least part of the drive component is located inside the protective cover, which can reduce the risk of dust and water stains coming into contact with the drive component and is suitable for outdoor or harsh environments.

[0175] The connection method between the drive component and the housing 1 is not limited. For example, the drive component can be detachably or non-detachably connected to the housing 1.

[0176] In some embodiments, please refer to Figure 5 The battery device 100 includes a temperature detection element 5, which is disposed in the receiving cavity 1a. The temperature detection element 5 is used to obtain the detection temperature of the receiving cavity 1a, and the controller 6 controls the drive component according to the detection temperature.

[0177] In this embodiment, the temperature detection element 5 can obtain the detection temperature of the cavity 1a in real time, and the controller 6 controls the drive component to drive the insulation component 3 to move according to the detection temperature. In this way, the state of the insulation component 3 can be automatically adjusted according to the actual temperature inside the cavity 1a, thereby improving the stability and reliability of the equipment operation.

[0178] The connection method between the temperature sensing element 5 and the housing 1 is not limited. For example, the temperature sensing element 5 can be detachably or non-detachably connected to the housing 1.

[0179] The type of temperature sensing element 5 is not limited. Temperature sensing element 5 can be a temperature sensor, such as a negative temperature coefficient sensor (NTC temperature sensor). The NTC temperature sensor can continuously acquire the internal temperature of the cavity 1a and convert the detected temperature signal into an analog signal of resistance change. In some embodiments, temperature sensing element 5 can be a waterproof NTC temperature sensor encapsulated in epoxy resin, which facilitates adaptation to the humid environment inside the cavity 1a. It has a resistance of 10 kΩ (kiloohms) at 25°C, a B value of 3435 K (Kelvin), i.e., a thermistor index of 3435 K, and a temperature measurement range of -40°C to 85°C.

[0180] In some embodiments, the insulation component 3 includes a temperature regulating element electrically connected to the controller 6, which is capable of generating and / or absorbing heat.

[0181] A temperature regulating element that can generate heat and / or absorb heat means that the temperature regulating element can generate heat only, thereby increasing the temperature; or, the temperature regulating element can absorb heat only, thereby decreasing the temperature; or, the temperature regulating element can both generate and absorb heat, thereby both increasing and decreasing the temperature.

[0182] In this embodiment, the temperature regulating element can provide at least one function of generating heat and absorbing heat, thereby providing at least one function of heating and cooling. The temperature regulating element is electrically connected to the controller 6 and can realize the temperature increase or decrease under the control of the controller 6. It can flexibly adjust the temperature according to actual needs. When the battery cell 2 needs to be heated, the controller 6 controls the temperature regulating element to generate heat. When the battery cell 2 needs to be cooled, the controller 6 controls the temperature regulating element to absorb heat, thus meeting diverse usage scenarios.

[0183] In some embodiments, the controller 6 is used to control the heat insulation component 3 to switch to the off state and control the temperature regulating component to heat up when the detected temperature is lower than the preset value and continues for a first preset time; the controller 6 is used to control the heat insulation component 3 to switch to the on state and control the temperature regulating component to stop heating when the detected temperature reaches the preset value and continues for a second preset time.

[0184] The preset value can be set according to the working requirements of the battery cell 2. For example, the preset value can be 0°C to 5°C.

[0185] The first preset duration can be set according to requirements. For example, the first preset duration can be from 1 second to 6 seconds. For instance, the first preset duration can be any value among 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, and 6 seconds, or any value between two of them.

[0186] The second preset duration can be set according to requirements. For example, the second preset duration can be from 1 second to 6 seconds. For instance, the second preset duration can be any value among 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, and 6 seconds, or any value between two of them.

[0187] Taking a preset value of 0℃ or 5℃, a first preset duration of 3s, and a second preset duration of 5s as an example, after power is supplied, the NTC temperature sensor continuously collects the detected temperature inside the cavity 1a, converts the detected temperature signal into a resistance signal with a change in resistance value, and the voltage divider circuit built into the controller 6 converts the resistance signal generated by the NTC temperature sensor into a voltage signal of 0V-3.3V (unit: volts), which is then converted into a digital temperature value by an AD converter (analog-to-digital converter) and compared with the preset value (such as 0℃ or 5℃) in real time. When the detected temperature is lower than the preset value for 3 consecutive seconds, the controller 6 outputs a high level to trigger the drive component, which drives the heat preservation component 3 to close the vent 1b, and at the same time triggers the temperature regulating component to heat up; when the detected temperature rises back to the preset value and continues for 5 consecutive seconds, the controller 6 outputs a low level, the drive component resets, the heat preservation component 3 opens the vent 1b, and the temperature regulating component stops heating up.

[0188] Temperature detection element 5 collects the temperature of the receiving cavity 1a in real time and transmits it to controller 6. Controller 6 compares the detected temperature with a preset value. When the detected temperature is lower than the preset value and remains so for a first preset duration, controller 6 outputs a control signal to switch the insulation component 3 to the off state and simultaneously controls the temperature regulating component to start heating. When the detected temperature reaches the preset value and remains so for a second preset duration, controller 6 outputs a control signal to switch the insulation component 3 to the on state and simultaneously controls the temperature regulating component to stop heating, thereby achieving closed-loop temperature control.

[0189] In this embodiment, by using a single preset value trigger and a delayed reset logic for control, frequent operation of the insulation component 3 caused by small temperature fluctuations can be avoided to a certain extent. When the internal temperature of the receiving cavity 1a is lower than the preset value, the insulation component 3 is turned off and the temperature regulating element is activated to reduce heat loss and improve heating efficiency. After the preset value is reached, the insulation component 3 is turned on and heating is stopped, which can reduce energy consumption, avoid overheating, and achieve energy-saving and safe temperature control.

[0190] In some embodiments, please refer to Figure 5 , Figure 7 and Figure 8 The terminal post 21 of the battery cell 2 faces the side of the first direction X, and the temperature detection element 5 is disposed on the side wall of the receiving cavity 1a along the second direction Y, where the first direction X and the second direction Y intersect.

[0191] The first direction X can intersect the second direction Y obliquely or perpendicularly.

[0192] In some embodiments, the first direction X can be parallel to the direction of gravity, and the second direction Y can be perpendicular to the first direction X. In this way, the second direction Y can be parallel to the horizontal direction, so that the terminal post 21 of the battery cell 2 can face the upper or lower side along the direction of gravity, and the temperature detection element 5 can be disposed on the side wall of the receiving cavity 1a along the horizontal direction.

[0193] It should be noted that the direction of gravity specifically refers to the direction of Earth's gravitational pull, in other words, the direction perpendicular to the Earth's center. The upper side along the direction of gravity refers to the side facing the sky, while the lower side refers to the side facing the ground.

[0194] In this embodiment, during the operation of the battery cell 2, the temperature of the terminal post 21 is relatively high, which is one of the main heat sources. The terminal post 21 of the battery cell 2 faces the first direction X. The temperature detection element 5 is disposed on the side wall of the receiving cavity 1a along the second direction Y. The distance between the temperature detection element 5 and the terminal post 21 is relatively far, which can avoid temperature acquisition deviation of the temperature detection element 5 to a certain extent.

[0195] In some embodiments, multiple monomer groups are arranged along the fourth direction, and the temperature detection element 5 can be disposed in the middle region of the sidewall of the receiving cavity 1a in the fourth direction, where the first direction X, the second direction Y, and the fourth direction intersect each other. In this way, the collected detection temperature is relatively uniform.

[0196] In some embodiments, the battery device 100 includes a limit switch, and the thermal insulation component 3 includes a flexible thermal insulation element 31. One end of the flexible thermal insulation element 31 in the third direction Z is fixedly connected to the housing 1, and the other end of the flexible thermal insulation element 31 in the third direction Z is a movable end. The movable end has an unfolded position for closing the vent 1b and a folded position for opening the vent 1b in the third direction Z.

[0197] When the active end moves to either the unfolded or folded position, it triggers the limit switch and generates a limit signal. The controller 6 then controls the drive component to stop operating based on the limit signal.

[0198] The third direction Z can be parallel, oblique, or perpendicular to the first direction X.

[0199] In some embodiments, the third direction Z can be parallel to the direction of gravity, so that the movable end of the insulation component 3 moves up and down along the direction of gravity to achieve unfolding or folding.

[0200] In some embodiments, the third direction Z can be parallel to the horizontal direction, so that the movable end of the insulation component 3 moves in the horizontal direction to achieve unfolding or folding.

[0201] In this embodiment, one end of the flexible insulation component 31 is fixed to the box body 1, and the other end is a movable end. The movable end can move between the unfolded position and the folded position along the third direction Z to realize the closing and opening of the ventilation port 1b. At the same time, the position status of the movable end is detected in real time by the limit switch and a feedback signal is sent to the controller 6. When the movable end moves to the unfolded position or the folded position, the limit switch is triggered and a limit signal is generated. The controller 6 controls the drive component to stop running according to the limit signal, thereby limiting the movement stroke of the movable end and reducing the risk of the movable end overtravel.

[0202] A limit switch can be set in both the unfolded and folded positions. The type of limit switch is not limited; for example, it can be a miniature travel switch.

[0203] In some embodiments, the drive component may have a built-in travel limit switch, which, together with the limit switch, provides dual protection to prevent overtravel from damaging the insulation component 3.

[0204] In some embodiments, please refer to Figures 5 to 8 The first section 41 of the heat pipe 4 is connected to the lower end of the battery cell 2 along the direction of gravity.

[0205] In this embodiment, the lower end of the battery cell 2 along the direction of gravity is the end of the battery cell 2 that is close to the ground along the direction of gravity. The first section 41 of the heat pipe 4 is connected to the lower end of the battery cell 2 along the direction of gravity, and the first section 41 of the heat pipe 4 can bear the weight of the battery cell 2.

[0206] In some embodiments, please refer to Figures 5 to 8 The first section 41 of the heat pipe 4 is connected to the lower end of the battery cell 2 along the direction of gravity, and the second section 42 of the heat pipe 4 can extend upward along the direction of gravity. Here, there is a height difference between the first section 41 and the second section 42. Due to gravity and capillary action, the liquid working fluid in the condensation section quickly flows back to the evaporation section. This process is repeated, and heat will continuously be exchanged between the condensation section and the outside through the self-circulation inside the heat pipe 4.

[0207] The shape of heat pipe 4 is not limited; please refer to some embodiments. Figures 5 to 8The heat pipe 4 has a flat plate-like structure. The first section 41 of the heat pipe 4 can be connected to the lower end of the battery cell 2 along the direction of gravity, and the second section 42 of the heat pipe 4 is located on one side of at least two battery cells 2 in the horizontal direction. Thus, the heat pipe 4 has a roughly L-shaped flat plate-like structure.

[0208] In some embodiments, the insulation component 3 may include a rigid insulation board that is rotatably connected to the housing 1 and can rotate to open or close the vent 1b.

[0209] The material of the rigid insulation board is not limited. For example, the insulation board can be made of thermal insulation material, such as polyurethane foam or other rigid thermal insulation materials.

[0210] In some embodiments, the insulation board may have a vacuum space inside, that is, the insulation board may be a vacuum insulation board.

[0211] In some embodiments, please refer to Figure 3 and Figure 4 , Figure 3 In the middle, the flexible insulation component 31 unfolds to close the vent 1b, that is, the vent 1b is in the closed state. The insulation component 3 includes the flexible insulation component 31, which can be unfolded or folded along the third direction Z. In the closed state, the flexible insulation component 31 unfolds to close the vent 1b; in the open state, the flexible insulation component 31 folds to open the vent 1b.

[0212] The flexible insulation component 31 is a structure that can undergo elastic deformation.

[0213] The flexible insulation component 31 can unfold along the third direction Z, thereby increasing its dimension along the third direction Z; the flexible insulation component 31 can fold along the third direction Z, thereby decreasing its dimension along the third direction Z. In this way, the flexible insulation component 31 will not be damaged during movement.

[0214] In this embodiment, the flexible insulation component 31 can unfold along the third direction Z, thereby increasing the area to cover the vent 1b, thus closing the vent 1b; the flexible insulation component 31 can fold along the third direction Z, thereby reducing the area to avoid the vent 1b, thus opening the vent 1b.

[0215] In some embodiments, the flexible insulation element 31 forms multiple folds arranged along the third direction Z. The multiple folds are generally wavy. The folds can be used to compensate for deformation displacement. During the movement of the flexible insulation element 31, the multiple folds are compressed and folded or stretched and flattened, changing the dimension of the flexible insulation element 31 along the third direction Z.

[0216] In some embodiments, one end of the flexible insulation component 31 in the third direction Z can be sealed to the housing 1. The sealing connection method is not limited, and for example, it includes, but is not limited to, bonding or welding. That is to say, there are no gaps at the connection between the flexible insulation component 31 and the housing 1 that allow water and air to pass through, achieving good waterproof and dustproof effects.

[0217] In some embodiments, when closed, the movable end of the flexible insulation component 31 in the third direction Z can seal against the side wall of the housing 1. The flexible insulation component 31 is made of elastic material, and when unfolded, it can adapt to the slight errors of the side wall of the housing 1, ensuring a tight fit and improving the insulation effect.

[0218] The material of the flexible insulation component 31 is not limited. The flexible insulation component 31 can be made of a waterproof and dustproof flexible material. The flexible insulation component 31 can be a single-layer or multi-layer layered structure. For example, the flexible insulation component 31 includes a layered structure made of polyurethane foam.

[0219] In some embodiments, the insulation component 3 may be located inside the housing 1.

[0220] In some embodiments, the insulation component 3 can be located on the outside of the housing 1. This avoids the insulation component 3 occupying space inside the housing 1.

[0221] In some embodiments, the insulation component 3 may have a movement gap with the outer surface of the housing 1 to prevent the insulation component 3 from moving against the surface of the housing 1 and causing friction damage.

[0222] The movement gap can be set according to requirements. For example, the movement gap can be 1mm-10mm (unit: millimeter). For instance, the movement gap can be 1mm, 2mm, 5mm, 8mm, or 10mm, etc.

[0223] In some embodiments, when the flexible insulation member 31 is in the unfolded position, it wraps around the perimeter of the vent 1b and adheres to the outer surface of the side wall of the housing 1. Thus, when unfolded, the flexible insulation member 31 completely covers the area surrounding the vent 1b and adheres to the outer surface of the side wall of the housing 1 without gaps, essentially completely concealing the vent 1b.

[0224] In some embodiments, the thickness of the flexible insulation component 31 in its folded state is no more than 20 mm. In this way, the flexible insulation component 31 can occupy as little extra space as possible.

[0225] In some embodiments, the thermal insulation component 3 includes a temperature regulating element disposed on the flexible thermal insulation component 31, the temperature regulating element being capable of generating heat and / or absorbing heat.

[0226] In this embodiment, the temperature regulating element can provide at least one function of generating heat and absorbing heat, thereby providing at least one function of heating and cooling.

[0227] In some embodiments, a medium flow channel can be formed inside the temperature control element, and the heat exchange medium flows through the medium flow channel.

[0228] In some embodiments, the temperature control element includes multiple heat exchange plates stacked together to form a medium flow channel. For example, portions of two heat exchange plates may be connected, with the remaining portions spaced apart to form a channel for the medium flow.

[0229] The heat exchange medium is a flowable fluid, and its specific type is not limited here; for example, it can be gaseous or liquid. This application describes the heat exchange medium as a coolant in the embodiments. Coolants include, but are not limited to, water, ethylene glycol, and other refrigerants.

[0230] The principle behind the temperature regulating component's ability to raise and lower the temperature is as follows: the heat exchange medium output from the heat exchange medium source continuously circulates into the temperature regulating component. By adjusting the temperature of the heat exchange medium, it is made to be higher or lower than the temperature of the internal environment of the containment cavity 1a, thereby providing heating or heat dissipation functions. For example, when the battery cell 2 needs to dissipate heat, the temperature of the heat exchange medium can be lower than the temperature of the battery cell 2, the insulation component 3 becomes a cold source, and the heat pipe 4 can transfer the heat from the battery cell 2 to the insulation component 3, thereby removing the high temperature of the battery cell 2. When the battery cell 2 needs to be heated, the temperature of the heat exchange medium can be higher than the temperature of the battery cell 2, the insulation component 3 becomes a heat source, and the heat pipe 4 can transfer the heat from the temperature regulating component to the battery cell 2, thereby raising the temperature of the battery cell 2. In this way, by actively raising or lowering the temperature through the temperature regulating component, the battery cell 2 is kept within a suitable temperature range.

[0231] The heat exchange medium source is not limited; for example, the heat exchange medium source can be a heat pump system.

[0232] In some embodiments, the temperature control element includes at least one of a flexible heating film and a heating wire.

[0233] The flexible heating film is a flexible electric heating element that can be bent and heats in a planar manner. The flexible heating film can efficiently convert electrical energy into heat energy. The flexible heating film can closely fit curved and irregular surfaces, which is conducive to the adhesion of the flexible heating film to the flexible insulation component 31 and to a large contact area with the flexible insulation component 31.

[0234] A heating wire is a metal wire that generates heat through resistance when electricity is applied. Heating wires convert electrical energy into heat energy based on the Joule heating principle.

[0235] In some embodiments, the temperature control element can be a flexible heating film or a heating wire.

[0236] In some embodiments, the temperature control element may include a flexible heating film and a heating wire.

[0237] In this embodiment, the flexible heating film is a flexible electric heating element that can be bent and heats in a planar manner, and the heating wire is a metal wire that heats up through resistance when energized. Both the flexible heating film and the heating wire can convert electrical energy into heat energy, thereby generating heat.

[0238] The flexible heating film can have a heating material attached to a flexible substrate. For example, the flexible substrate includes, but is not limited to, flexible polyimide, and the heating material includes, but is not limited to, metal foil, resistive paste, or graphene, etc.

[0239] The thickness of the flexible heating film is not limited; for example, the thickness of the flexible heating film is 0.1mm-0.3mm.

[0240] In some embodiments, the temperature regulating element is disposed on the side of the flexible insulation element 31 near the receiving cavity 1a.

[0241] In this embodiment, the temperature regulating element is located inside the flexible insulation element 31, and the temperature regulating element is closer to the heat pipe 4, which makes it easier for the temperature regulating element to release heat to the second section 42 of the heat pipe 4 or absorb heat from the heat pipe 4 more quickly.

[0242] In some embodiments, the battery device 100 includes a temperature control switch electrically connected to a temperature regulating element.

[0243] In this embodiment, the temperature control switch is connected in series with the temperature regulating component. The temperature control is used to control the on / off state of the temperature regulating component, which can quickly respond to the power-on heating and power-off protection of the temperature regulating component, and prevent the temperature regulating component from overheating.

[0244] In some embodiments, the battery device 100 includes a temperature sensing element disposed on the temperature regulating element, the temperature sensing element being used to detect the temperature of the temperature regulating element, and a temperature control switch being electrically connected to the temperature sensing element. The temperature sensing element is used to detect the temperature of the temperature regulating element to prevent overheating.

[0245] The type of temperature sensing element is not limited. For example, the temperature sensing element can be a temperature sensor, such as a negative temperature coefficient sensor (NTC temperature sensor), which can continuously collect the temperature of the temperature regulating element. In some embodiments, the temperature sensing element can be a surface-mount NTC temperature sensor, which can be attached to the surface of the temperature regulating element.

[0246] In some embodiments, the insulation component 3 includes a flame-retardant layer, and at least a portion of the surface of the flexible insulation component 31 is provided with a flame-retardant layer.

[0247] The flame-retardant layer is a layered structure made of flame-retardant materials. It can inhibit the spread of flames and reduce the burning rate, thereby improving fire safety.

[0248] In some embodiments, a flame-retardant layer is provided on a portion of the surface of the flexible insulation element 31.

[0249] In some embodiments, the entire surface of the flexible insulation element 31 is provided with a flame-retardant layer.

[0250] In this embodiment, a flame-retardant layer is provided on the insulation component, which can block heat and / or flame from directly acting on the flexible insulation component 31 to a certain extent, suppress the spread of flame, reduce the burning rate, and reduce the risk of the flexible insulation component 31 burning or being damaged due to heat.

[0251] The material of the flame-retardant layer is not limited. For example, the material of the flame-retardant layer includes, but is not limited to, at least one of aluminum silicate cotton and polyurethane cotton. For example, the flame-retardant layer can be an aluminum silicate cotton layer or a polyurethane cotton layer. The flame-retardant layer can also be composed of multiple layers of aluminum silicate cotton and polyurethane cotton stacked together.

[0252] The flame-retardant layer can have a heat insulation effect; for example, the thermal conductivity of the flame-retardant layer is not greater than 0.03 W / (m·K).

[0253] In some embodiments, the flame-retardant layer is disposed on the side of the flexible insulation member 31 opposite to the receiving cavity 1a.

[0254] In this embodiment, the flame-retardant layer is disposed on the side of the flexible insulation component 31 away from the receiving cavity 1a, which can block the influence of flames or high temperatures outside the box 1 on the flexible insulation component 31.

[0255] In some embodiments, housing 1 includes a vent 1b.

[0256] In some embodiments, the housing 1 includes at least two vents 1b, and each vent 1b is provided with a heat insulation component 3.

[0257] In this embodiment, each vent 1b is equipped with a heat insulation component 3, which can flexibly adjust the opening and closing state of the corresponding vent 1b according to usage requirements, thereby enhancing the flexibility and applicability of use.

[0258] In some embodiments, ventilation openings 1b are formed on two side walls along the second direction Y, one side wall along the fourth direction, and one side wall along the first direction X of the housing 1, and an operating opening can be formed on the other side wall along the fourth direction. Taking the first direction X as parallel to the direction of gravity, the second direction Y as parallel to the left-right direction, and the fourth direction as parallel to the front-back direction as an example, wherein the direction of gravity, the left-right direction, and the front-back direction are perpendicular to each other, ventilation openings 1b are formed on the left side wall, right side wall, rear side wall, and top side wall of the housing 1, and an operating opening is formed on the front side wall of the housing 1.

[0259] In some embodiments, the driving component is connected to each insulation component 3. In this way, each insulation component 3 can be driven in unison by a single driving component, which not only saves costs but also avoids, to some extent, the synchronization problems caused by multiple driving components driving separately.

[0260] In some embodiments, the drive component includes a drive mechanism for providing power.

[0261] In some embodiments, the drive mechanism includes a miniature electric actuator with a stroke of 20mm-50mm and a thrust of 50N-100N, which has the advantages of large thrust and smooth movement.

[0262] In some embodiments, the drive mechanism includes a digital servo motor with a torque of 15-20 kg·cm, which has the advantages of small size and fast response.

[0263] In some embodiments, the battery device 100 includes a linkage rod, and the drive assembly includes a drive mechanism, at least two fixed seats, and at least two folding arm assemblies. Each folding arm assembly corresponds to a heat preservation component 3 and a fixed seat. The fixed seats are connected to the side wall of the housing 1. Each folding arm assembly includes at least two folding arms that are hinged in sequence. The first folding arm is hinged to the fixed seat, and the last folding arm is hinged to the heat preservation component 3. The linkage rod connects the first folding arms of all folding arm assemblies. One end of the drive mechanism, such as an electric push rod, is connected to the linkage rod.

[0264] Multiple folding arms are hinged sequentially, meaning that adjacent folding arms are connected by revolute joints, allowing them to rotate relative to each other around a fixed axis. Each folding arm is connected and rotated sequentially. Here, the overall posture deformation of the folding arm assembly can be achieved through the independent rotation of any two adjacent folding arms, and the rotations of each arm do not interfere with each other.

[0265] The number of folding arms in a single folding arm group is unlimited. The number of folding arms can be two or more. For example, the number of folding arms can be two, three, or four, etc.

[0266] The first folding arm is the first folding arm that is hinged to the fixed base among multiple folding arms that are hinged in sequence, and serves as the connection carrier between the entire folding arm assembly and the housing 1.

[0267] The folding arm at the tail end is the folding arm at the very end of the folding arm group that is hinged directly to the insulation component 3 among multiple folding arms that are hinged in sequence. It serves as the connection carrier between the entire folding arm group and the insulation component 3.

[0268] In some embodiments, the multiple folding arms include a first folding arm and a second folding arm. The first folding arm is the folding arm at the front end and is hinged to the fixed base. One end of the second folding arm is hinged to the first folding arm, and the other end of the second folding arm is hinged to the insulation component 3. In this embodiment, the fixed base, the first folding arm, the second folding arm, and the insulation component 3 are hinged sequentially to form a structure similar to a four-bar linkage, which is simple and compact.

[0269] In some embodiments, the folding arm at the tail end is hinged to the flexible insulation element 31.

[0270] Taking the flexible insulation component 31 moving from the folded position to the unfolded position as an example, when the flexible insulation component 31 is in the folded position, the folding arm at the first end can be in a vertical state parallel to the direction of gravity. When the flexible insulation component 31 is in the unfolded position, the folding arm at the first end can be in a horizontal state parallel to the horizontal direction. The controller 6 outputs a high level, the electric push rod extends, and the electric push rod transmits the thrust to the folding arm at the first end, causing the folding arm at the first end to rotate 90° in the positive direction around the hinge axis of the fixed base. For example, the folding arm at the first end changes from a vertical state to a horizontal state. The folding arm assembly drives the movable end of the flexible insulation component 31 to move synchronously until the movable end of the flexible insulation component 31 moves to the unfolded position. The limit switch at the unfolded position is triggered, sending a limit signal to the controller 6 indicating that the unfolded position is reached. After receiving the limit signal, the controller 6 keeps the drive mechanism powered, thus locking the flexible insulation component 31 in the unfolded position. At the same time, the temperature regulating component is activated, and the temperature regulating component begins to heat up. The flexible insulation component 31 blocks the ventilation opening 1b to achieve thermal insulation.

[0271] Taking the flexible insulation component 31 as an example, it can be initially in the open state. When the detected temperature reaches a preset value and continues for a second preset time, the controller 6 outputs a low level, the electric push rod retracts, and the electric push rod pulls the linkage rod to move in the opposite direction. Under the pulling force of the electric push rod, the folding arm at the first end rotates 90° in the opposite direction around the hinge axis of the fixed seat. For example, the folding arm at the first end changes from a horizontal state to a vertical state. The folding arm group drives the movable end of the flexible insulation component 31 to move synchronously until the movable end of the flexible insulation component 31 moves to the folding position. The limit switch at the folding position is triggered and sends a limit signal to the controller 6 indicating that the folding is in place. After receiving the limit signal, the controller 6 cuts off the power supply to the drive mechanism and the temperature regulating component. The flexible insulation component 31 completes the folding and storage and returns to the initial state.

[0272] The duration of movement of the flexible insulation component 31 between the folded and unfolded positions can be designed according to requirements. For example, the duration of movement of the flexible insulation component 31 between the folded and unfolded positions can be 1s-2s.

[0273] In this embodiment, the fixed base provides a fulcrum for the movement of the folding arm assembly. Multiple folding arm assemblies and multiple insulation components 3 can be driven synchronously through a driving mechanism, which is beneficial for the synchronous unfolding or folding of multiple insulation components 3 and reduces the risk of jamming.

[0274] In some embodiments, the mounting base may be located outside the housing 1 or inside the housing 1.

[0275] The mounting base and the housing 1 can be detachably or non-detachably connected. For example, the mounting base and the housing 1 can be connected by bolts.

[0276] The material of the mounting base is not limited. For example, the mounting base can be made of metal and / or engineering plastic, such as ABS engineering plastic or aluminum alloy. These lightweight and high-strength materials can reduce the overall weight and avoid increasing the load on the box 1.

[0277] The material of the linkage is not limited. For example, the linkage can be made of metal and / or engineering plastic, such as ABS engineering plastic or aluminum alloy. These lightweight and high-strength materials can reduce the overall weight and avoid increasing the load on the box 1.

[0278] The material of the folding arm is not limited. For example, the folding arm can be made of metal and / or engineering plastic, such as ABS engineering plastic or aluminum alloy. These lightweight and high-strength materials can reduce the overall weight and avoid increasing the load on the box 1.

[0279] In some embodiments, two adjacent folding arms can be hinged together via a hinge axis.

[0280] In some embodiments, the folding arm at the head end and the fixed base can be hinged via a hinge axis.

[0281] In some embodiments, the folding arm at the tail end and the insulation component 3 can be hinged together via a hinge shaft.

[0282] In some embodiments, the surface of the hinge shaft may be coated with a wear-resistant coating, such as a Teflon coating, to reduce motion friction, reduce the risk of jamming, and improve service life.

[0283] In some embodiments, a bushing can be fitted over the hinge shaft to reduce motion friction, lower the risk of jamming, and extend service life.

[0284] The bushing can be made of a wear-resistant material; for example, the bushing can be made of nylon.

[0285] The shape of the folding arm is not limited; for example, the folding arm can be generally in the form of a rod-shaped structure.

[0286] In some embodiments, the battery device 100 includes a power supply and a step-down module, with the power supply, step-down module, temperature sensor 5, and controller 6 electrically connected in sequence. The power supply provides electrical energy, and the step-down module converts the voltage of the power supply to a target value. Here, the power supply, step-down module, temperature sensor 5, and controller 6 form a detection circuit for detecting the internal temperature of the accommodating cavity 1a.

[0287] The type of step-down module is not limited. For example, it can be a DC-DC isolated type, such as LM2596, which can convert 12V or 24V DC to 5V DC to prevent power supply interference.

[0288] In some embodiments, the power supply can provide 12V or 24V DC power, the step-down module converts the power supply voltage to 5V, the temperature sensor 5 is electrically connected to the step-down module, and the acquisition port of the analog-to-digital converter of the controller 6 is electrically connected to the temperature sensor 5. The signal terminal of the temperature sensor 5 is electrically connected to the acquisition port of the analog-to-digital converter of the controller 6 through a conductive wire, and the temperature sensor 5 is electrically connected to the ground terminal through another conductive wire.

[0289] In some embodiments, the power supply terminal of the controller 6 is electrically connected to the step-down module, the first output terminal of the controller 6 is electrically connected to the drive mechanism of the drive component, and the second output terminal of the controller 6 is electrically connected to the temperature control element.

[0290] The type of controller 6 is not limited. Controller 6 can have functions such as digital-to-analog conversion acquisition, relay output and adjustable threshold. Controller 6 supports threshold preset by program, which is convenient for adapting to mass production of battery devices.

[0291] In some embodiments, the controller 6 can be a microcontroller, such as an STM32F030 / 51 microcontroller, which has the advantage of low cost;

[0292] In some embodiments, the controller 6 can be an industrial-grade temperature controller 6, such as a rail-mounted industrial-grade temperature controller 6, which has the advantage of good stability. For example, the industrial-grade temperature controller 6 can be an Omron E5CC or a domestic Yudian AI-208, with a digital display, threshold knob adjustment, no programming required, and suitable for industrial scenarios.

[0293] The type of relay is not limited. For example, a 5V small electromagnetic relay can be used, with the drive component and temperature control component connected in series with the relay to realize the control of high voltage by low voltage.

[0294] In some embodiments, the drive component is electrically connected to the power supply and to the feedback terminal of the controller 6. The power supply outputs 12V or 24V DC power to directly drive the drive component, such as a miniature push rod or servo motor. The feedback terminal of the controller 6 can receive limit signals from limit switches to determine whether the movable end of the flexible insulation component 31 has reached the correct position.

[0295] In some embodiments, a temperature control switch is connected in series in the power supply circuit of the temperature regulating element to control its power supply and de-energization. Exemplarily, the power supply is electrically connected to the controller 6, and a temperature control switch can be connected in series between the temperature regulating element and the second output terminal of the controller 6. Here, a 12V or 24V DC power supply can directly drive the temperature regulating element. In some embodiments, the flexible insulation element 31 is in the open state, and the temperature regulating element can be de-energized.

[0296] The heating power of the temperature regulating component can be designed according to requirements. For example, it can be calculated based on the heat loss of the cavity 1a to avoid the battery cell 2 overheating due to excessive heating power, or the heating power being too small to achieve the heating effect. For example, the heating power of the temperature regulating component can be 5W-20W (unit: watt).

[0297] In some embodiments, the conductive wires are waterproof and flame-retardant, which improves safety.

[0298] In some embodiments, the ends of the conductive wires can be connected to connectors, which are then electrically connected to electronic control devices. The connectors can be IP67 waterproof.

[0299] In some embodiments, a diode is connected in series between the drive component and the controller 6. By adding diode freewheeling protection between the drive component and the controller 6, inductor backflash can be prevented from damaging the controller 6.

[0300] In some embodiments, a diode is connected in series between the temperature control element and the controller 6. By adding diode freewheeling protection between the temperature control element and the controller 6, inductor backflash can be prevented from damaging the controller 6.

[0301] In some embodiments, the power supply is electrically connected to the fuse, and the fuse is connected in series in the main circuit to immediately cut off the power in the event of a short circuit.

[0302] In some embodiments, the battery device 100 includes an air-cooling assembly disposed within a receiving cavity 1a. The air-cooling assembly includes a fan and heat dissipation fins. The fan is used to drive airflow, and the heat dissipation fins can be connected to the battery cell 2 or a heat pipe 4.

[0303] In some embodiments, a heat-reflective film may also be provided on the surface of the insulation component 3 facing away from the receiving cavity 1a. The heat-reflective film can reflect heat, thereby reducing the amount of heat from outside the housing 1 entering the receiving cavity 1a and reducing the impact of high temperatures outside the housing 1 on the inside of the housing 1.

[0304] In some embodiments, a heat-reflective film may also be provided on at least a portion of the outer surface of the housing 1. The heat-reflective film can reflect heat, thereby reducing the amount of heat from outside the housing 1 entering the receiving cavity 1a and reducing the impact of high temperatures outside the housing 1 on the interior of the housing 1.

[0305] In some embodiments, the battery device 100 may also be placed inside a solar awning. The solar awning not only converts solar energy into electrical energy, but also provides shade, thereby reducing the amount of heat from outside the housing 1 entering the receiving cavity 1a and reducing the impact of high temperatures outside the housing 1 on the interior of the housing 1.

[0306] In some embodiments, please refer to Figure 6 Multiple battery cells are arranged along the second direction Y to form a cell group. Multiple cell groups can be arranged along the third direction Z. One end of each cell group along the first direction X can be connected to the first segment 41 of a heat pipe 4.

[0307] The following describes the battery device 100 provided in this application embodiment further with a specific example. Please refer to [link to specific example]. Figures 2 to 8 This application provides a battery device 100, which includes a housing 1, a heat insulation component 3, a heat pipe 4, and at least two battery cells 2. The housing 1 includes a receiving cavity 1a and a vent 1b, the vent 1b connecting the receiving cavity 1a to the outside atmosphere; at least two battery cells 2 are disposed in the receiving cavity 1a; the heat insulation component 3 is connected to the housing 1, and the heat insulation component 3 has a closed state that can close the vent 1b and an open state that can open the vent 1b; at least a portion of the heat pipe 4 is disposed in the receiving cavity 1a, the first segment 41 of the heat pipe 4 is connected to at least two battery cells 2, and the second segment 42 of the heat pipe 4 is disposed in the vent 1b.

[0308] The battery device 100 also includes a controller 6, a drive assembly, and a temperature detection element 5. The drive assembly is electrically connected to the controller 6 and is drively connected to the insulation assembly 3. The controller 6 controls the drive assembly to switch the insulation assembly 3 between a closed state and an open state. The temperature detection element 5 is used to obtain the detection temperature of the receiving cavity 1a. The controller 6 controls the drive assembly according to the detection temperature. The insulation assembly 3 includes a flexible insulation element 31 and a temperature regulating element. The flexible insulation element 31 can be unfolded or folded along a third direction Z. In the closed state, the flexible insulation element 31 unfolds to close the vent 1b; in the open state, the flexible insulation element 31 folds to open the vent 1b. The temperature regulating element is electrically connected to the controller 6 and can generate heat and / or absorb heat. The controller 6 is used to control the insulation assembly 3 to switch to the closed state and control the temperature regulating element to heat up when the detection temperature is lower than a preset value for a first preset duration; the controller 6 is used to control the insulation assembly 3 to switch to the open state and control the temperature regulating element to stop heating when the detection temperature reaches the preset value for a second preset duration.

[0309] The battery device 100 provided in this embodiment of the application has a first section 41 of a heat pipe 4 connected to at least two battery cells 2, and a second section 42 of the heat pipe 4 disposed at a vent 1b. One of the battery cells 2 and the internal environment of the housing cavity 1a serves as a heat source, and the other as a cold source. The heat pipe 4 utilizes the phase change process of the heat transfer medium to achieve heat conduction between the internal environment of the housing cavity 1a and the battery cells 2. The heat transfer of the heat pipe 4 is reversible. When the battery cells 2, as the heat source, need to dissipate heat, the second section 42 of the heat pipe 4 becomes a condensation section, and the first section 41 of the heat pipe 4 becomes an evaporation section. A heat insulation component is also included. The insulation component 3 can be in the open state. The heat from the battery cell 2 is conducted to the internal environment of the housing cavity 1a through the heat pipe 4. The housing cavity 1a can exchange airflow with the outside atmosphere, thereby quickly removing the heat from the second section 42 and achieving heat dissipation for the battery cell 2. When the battery cell 2 needs to absorb heat as a cold source, the second section 42 of the heat pipe 4 is the evaporation section, and the first section 41 of the heat pipe 4 is the condensation section. The insulation component 3 can be in the closed state to reduce airflow exchange between the housing cavity 1a and the outside atmosphere, thereby reducing heat loss within the housing cavity 1a and achieving heat preservation for the battery cell 2. The heat pipe 4 is a self-sealing structure, which does not involve scenarios where end customers add coolant to the heat pipe 4 themselves. Therefore, it does not bring about the problem of coolant mixing in related technologies. Moreover, the heat pipe 4 has good thermal conductivity and temperature uniformity. Combined with the opening or closing of the vent 1b by the insulation component 3, it can meet the heat dissipation and heat preservation requirements of the battery cell 2 to a certain extent, allowing the battery cell 2 to operate at a suitable temperature. By employing a single preset value trigger and a delayed reset logic for control, frequent operation of the insulation component 3 caused by small temperature fluctuations can be avoided to a certain extent. When the internal temperature of the accommodating cavity 1a is lower than the preset value, the insulation component 3 is turned off and the temperature regulating element is activated to reduce heat loss and improve heating efficiency. After the preset value is reached, the insulation component 3 is turned on and heating is stopped, which can reduce energy consumption, avoid overheating, and achieve energy-saving and safe temperature control.

[0310] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. A battery device, characterized in that, The battery device includes: The enclosure includes a receiving cavity and a vent, the vent connecting the receiving cavity to the outside atmosphere; At least two battery cells are disposed within the receiving cavity; A thermal insulation component is connected to the housing, and the thermal insulation component can close or open the ventilation opening by rotating, folding or sliding. A heat pipe, at least a portion of which is disposed within the receiving cavity, a first section of which is connected to the at least two battery cells, and a second section of which is disposed at the vent. When the insulation component is in the closed state, it blocks the heat exchange between the second section and the outside atmosphere.

2. The battery device according to claim 1, characterized in that, The battery device includes: The controller is located within the enclosure; A drive assembly is disposed in the housing. The drive assembly is electrically connected to the controller and is drively connected to the insulation assembly. The controller controls the drive assembly to drive the insulation assembly to switch between the closed state and the open state.

3. The battery device according to claim 2, characterized in that, The battery device includes: A temperature sensor is disposed within the receiving cavity. The temperature sensor is used to acquire the temperature of the receiving cavity. The controller controls the drive assembly based on the acquired temperature.

4. The battery device according to claim 3, characterized in that, The insulation component includes a temperature regulating element, which is electrically connected to the controller and is capable of generating and / or absorbing heat.

5. The battery device according to claim 4, characterized in that, The controller is used to control the heat preservation component to switch to the off state and control the temperature regulating component to heat up when the detected temperature is lower than the preset value and continues for a first preset time. The controller is used to control the heat preservation component to switch to the open state and control the temperature regulating component to stop heating when the detected temperature reaches the preset value and continues for a second preset time.

6. The battery device according to claim 3, characterized in that, The battery cell has its terminal post facing the first direction, and the temperature detection element is disposed on the side wall of the receiving cavity along the second direction, where the first direction and the second direction intersect.

7. The battery device according to claim 2, characterized in that, The battery device includes a limit switch, and the insulation component includes a flexible insulation element. One end of the flexible insulation element in the third direction is fixedly connected to the housing, and the other end of the flexible insulation element in the third direction is a movable end. The movable end has an unfolded position for closing the vent and a folded position for opening the vent in the third direction. When the movable end moves to one of the unfolded position and the folded position, it triggers the limit switch and generates a limit signal. The controller then controls the drive component to stop operating based on the limit signal.

8. The battery device according to claim 1, characterized in that, The first section of the heat pipe is connected to the lower end of the battery cell along the direction of gravity.

9. The battery device according to claim 1, characterized in that, The thermal insulation component includes a flexible thermal insulation element that can be unfolded or folded along a third direction; in the closed state, the flexible thermal insulation element unfolds to close the vent. In the open state, the flexible insulation element folds to open the vent.

10. The battery device according to claim 9, characterized in that, The thermal insulation component includes a temperature regulating element disposed on the flexible thermal insulation component, the temperature regulating element being capable of generating heat and / or absorbing heat.

11. The battery device according to claim 10, characterized in that, The temperature regulating element includes at least one of a flexible heating film and a heating wire.

12. The battery device according to claim 10, characterized in that, The temperature regulating element is disposed on the side of the flexible insulation element near the receiving cavity.

13. The battery device according to claim 10, characterized in that, The battery device includes a temperature control switch, which is electrically connected to the temperature regulating element.

14. The battery device according to claim 9, characterized in that, The thermal insulation component includes a flame-retardant layer, and the flame-retardant layer is provided on at least a portion of the surface of the flexible thermal insulation component.

15. The battery device according to claim 14, characterized in that, The flame-retardant layer is disposed on the side of the flexible insulation component away from the receiving cavity.

16. The battery device according to any one of claims 1 to 15, characterized in that, The enclosure includes at least two ventilation openings, and each ventilation opening is provided with a heat insulation component.

17. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 16.

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