Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a battery monomer, a heat exchange piece, a circulating pipeline and a fluid valve, the fluid valve is connected with the circulating pipeline; the fluid valve has a fluid channel; a floater is arranged in the fluid valve and can move in the fluid valve and block the fluid channel, and the density of the floater is smaller than that of heat exchange liquid in the circulation pipeline. The automatic control of the fluid channel is realized through the change of the floater along with the liquid level, the exhaust function can be automatically started when gas is generated in the circulating pipeline, and the gas is exhausted to keep the liquid level in the circulating pipeline stable, so that the circulating efficiency of heat exchange liquid is guaranteed, the temperature control stability of the battery monomers is maintained, and the risk of thermal runaway is reduced. In addition, the fluid valve is simple in structure, small in size and low in cost.

Description

Technical Field

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

[0002] An exhaust device is a device used to vent air from the cooling system of a battery device, and its main function is to ensure the stable operation of the system. Exhaust devices in related technologies are expensive and have complex structural designs, making system installation and maintenance more difficult. Because the system contains many moving parts, the risk of failure also increases accordingly; a malfunction may affect the normal operation of the entire system. The maintenance and operation of traditional devices require a high level of expertise, which limits their application in certain specific scenarios and makes it difficult to fully meet the practical requirements of high efficiency and reliability. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a battery device with a fluid valve. The fluid valve has a simple structure and is conducive to ensuring the reliability of the battery device and the power supply device.

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this application provides the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a battery device comprising: a battery cell; a heat exchanger for exchanging heat with the battery cell; a circulation pipeline connected to the heat exchanger; and a fluid valve connected to the circulation pipeline, the fluid valve having a receiving cavity and a fluid channel communicating with the receiving cavity; wherein, a float is provided inside the fluid valve, the float being movable within the receiving cavity and capable of blocking the fluid channel, the density of the float being less than the density of the heat exchange fluid in the circulation pipeline.

[0006] In the above technical solution, the float automatically controls the fluid channel by changing the liquid level. When gas is generated in the circulation pipeline, the exhaust function is automatically activated to release the gas, maintaining a stable liquid level in the circulation pipeline. This ensures the heat exchange fluid circulation efficiency, thereby guaranteeing the heat exchange efficiency between the heat exchange components and the battery cells, maintaining the temperature control stability of the battery cells, and reducing the risk of thermal runaway. Furthermore, the fluid valve has a simple structure, small size, and low cost.

[0007] In some embodiments, the float is provided with a sealing element that mates with the fluid channel.

[0008] In the above technical solution, the sealing component can fit tightly against the fluid channel, ensuring the sealing effect on the fluid channel.

[0009] In some embodiments, the sealing element includes a sealing head and a connecting rod. The sealing head is located inside the fluid channel and presses against the sealing step of the fluid channel to seal the fluid channel. The connecting rod extends into the receiving cavity and is connected to the float. The fluid channel is disposed on the side wall of the receiving cavity.

[0010] In the above technical solution, the float descends and drags the connecting rod away from its original position. The rod deflection causes the sealing head to tilt relative to the sealing step, creating a gap. The heat exchange fluid can enter the receiving cavity through this gap to replenish the circulation pipeline. The sealing component has a simple structure, no complex transmission mechanism, and occupies little space. At the same time, the sealing head presses against the sealing step to seal, with uniform force and reliable leakage prevention effect.

[0011] In some embodiments, the battery device further includes a spring that is supported within the fluid channel and presses against the sealing head.

[0012] In the above technical solution, the spring provides continuous preload, ensuring that the sealing head always fits tightly against the sealing step, compensating for installation deviations or component wear, and preventing fluid leakage.

[0013] In some embodiments, the battery device further includes: a cap disposed within a fluid channel and having a through-hole therethrough, and a spring supporting the cap between the sealing head and the cap.

[0014] In the above technical solution, the cap provides fixed support for the spring and restricts the movement of the sealing head, preventing spring misalignment and sealing head displacement, and ensuring that the spring preload acts perpendicularly on the sealing surface. As an independently detachable component, the cap can be directly disassembled for inspection or replacement of the spring and sealing head, resulting in high operational efficiency.

[0015] In some embodiments, a filter screen is provided inside the through hole.

[0016] In the above technical solution, the filter screen can effectively filter impurities in the fluid, prevent foreign objects from entering the cavity, and prevent the fluid valve from failing due to blockage by impurities.

[0017] In some embodiments, the sealing element is located within the receiving cavity and presses against the port of the fluid channel to seal the fluid channel, which includes at least one of an exhaust channel or a replenishment channel.

[0018] The descent of the float causes the sealing element to move, thereby connecting the fluid channel with the receiving cavity, which allows for the replenishment and venting of fluid in the circulation pipeline. The sealing element has a simple structure, no complex structure, and occupies little space.

[0019] In some embodiments, the sealing element is an elastic element.

[0020] In the above technical solution, the elastic element can compensate for the processing error, wear or assembly gap of the sealing surface through its own deformation, thereby improving the sealing performance of the device.

[0021] In some embodiments, the fluid passage includes an exhaust passage and a replenishment passage.

[0022] In the above technical solution, when the liquid level drops, the float descends along with the liquid level, separating the float from the venting channel and the replenishment channel. Gas is discharged from the venting channel, and liquid enters the receiving cavity from the replenishment channel. When the liquid level rises, the float returns to its original position, sealing the venting channel and closing the replenishment channel. This allows for automatic control of the venting and replenishment channels by adjusting the float according to the liquid level. When gas is generated in the circulation pipeline, the venting function is automatically activated to discharge the gas while simultaneously opening the replenishment channel to replenish the heat exchange fluid. This maintains a stable liquid level in the circulation pipeline, achieving efficient venting, precise replenishment, and dynamic balance. Consequently, sufficient heat exchange fluid is ensured in the circulation pipeline and heat exchange components, guaranteeing the heat exchange fluid circulation efficiency and thus ensuring the heat exchange efficiency between the heat exchange components and the battery cells. This maintains the temperature control stability of the battery cells and reduces the risk of thermal runaway.

[0023] In some embodiments, the battery device further includes a replenishment tank, which is connected to both an exhaust channel and a replenishment channel.

[0024] In the above technical solution, when the float opens the venting channel and the replenishment channel as the liquid level changes, the gas in the containment chamber enters the replenishment tank through the venting channel. At the same time, the liquid in the replenishment tank enters the containment chamber through the replenishment channel. This allows the venting function to be automatically activated when gas is generated in the circulation pipeline, venting the gas and simultaneously opening the replenishment channel to replenish the heat exchange liquid, thus maintaining a stable liquid level in the circulation pipeline.

[0025] In some embodiments, the receiving cavity includes a top wall and a side wall surrounding the top wall, a liquid replenishment channel is disposed on the side wall, and an exhaust channel is disposed on the top wall.

[0026] In the above technical solution, the gas density is much smaller than that of the heat exchange liquid, so it will naturally float to the top wall of the receiving cavity. The exhaust channel is located on the top wall to directly discharge the accumulated gas. The liquid replenishment channel is located on the side wall, so the heat exchange liquid will enter the receiving cavity along the side wall, avoiding the heat exchange liquid from impacting the float and making the liquid replenishment more stable.

[0027] In some embodiments, a groove is provided on the outer surface of the float, and the groove forms a fluid channel with the cavity wall of the receiving cavity.

[0028] In the above technical solution, the fluid channel guides the heat exchange fluid smoothly into the pipeline, reduces the obstruction of the heat exchange fluid by the float, reduces flow resistance, and directly increases the replenishment speed.

[0029] Secondly, embodiments of this application provide an electrical device that includes the aforementioned battery device, which is used to provide electrical energy.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0033] Figure 2 Structural block diagrams of battery devices provided in some embodiments of this application;

[0034] Figure 3 An exploded view of a portion of a battery device provided in some embodiments of this application;

[0035] Figure 4 A partial structural schematic diagram of another part of the battery device provided in some embodiments of this application;

[0036] Figure 5 for Figure 4 A partial cross-sectional view of the structure shown.

[0037] Figure 6 An exploded view of the structure of a fluid valve provided in some embodiments of this application;

[0038] Figure 7 Schematic cross-sectional view of a fluid valve provided in some embodiments of this application;

[0039] Figure 8 for Figure 7 A cross-sectional view of the fluid valve in another state.

[0040] Figure 9 Schematic diagrams of the structure of the float provided in some embodiments of this application;

[0041] Figure 10 A cross-sectional view of another embodiment of the fluid valve provided in some embodiments of this application;

[0042] Figure 11 This is a cross-sectional structural schematic diagram of yet another embodiment of the fluid valve provided in some embodiments of this application.

[0043] The attached figures are labeled as follows:

[0044] 1000, vehicles;

[0045] 100. Battery assembly; 110. Battery cell; 120. Housing; 1201. Upper housing; 1202. Lower housing; 130. Heat exchanger; 140. Circulation pipeline;

[0046] 150. Fluid valve; 151. Receiving cavity; 1511. Top wall; 1512. Side wall; 152. Fluid passage; 153. Exhaust passage; 154. Liquid replenishment passage; 155. Float; 1551. Groove; 1552. Mating hole; 1553. Mating groove; 156. Sealing component; 1561. Sealing head; 1562. Connecting rod; 157. Spring; 158. Cap; 1581. Through hole; 159. Filter screen;

[0047] 160. Liquid cooling unit; 170. Liquid replenishment tank; 181. Exhaust pipe; 182. Liquid replenishment pipe; 190. Device switch;

[0048] 200, controller; 300, motor. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, not intended to limit the scope of protection of this application. Through these descriptions, the features and advantages of this application will become clearer and more explicit.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and the foregoing description of this application are intended to cover non-exclusive inclusion.

[0051] The term "embodiment" as used in this application 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0052] The specific term "exemplary" used in this application means "serving as an example, embodiment, or illustration." Any embodiment illustrated as "exemplary" is not necessarily to be construed as superior or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0053] In the description of this application, the technical terms "first", "second", "third", 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.

[0054] In the description of this application, the technical term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0055] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] In the description of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), unless otherwise explicitly specified. Similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0059] In the description of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0060] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0061] In related technologies, an venting device is a apparatus used to vent air from the cooling system of a battery device. Simultaneously, it replenishes coolant to ensure stable system operation. The replenishment device typically consists of key components such as a storage tank, a replenishment pump, and a pressure sensor. The storage tank stores spare coolant, and the pressure sensor monitors real-time pressure changes in the liquid cooling system. When the pressure in the cooling system falls below a set value, an electronic valve opens to open the replenishment channel, the replenishment pump starts, and replenishes coolant to the liquid cooling system. Simultaneously, the venting device is activated to expel excess gas from the system. When the pressure sensor detects a pressure higher than the set value, the replenishment pump shuts off, the electronic valve closes to close the replenishment channel, and the venting device shuts off, completing both replenishment and venting. While this structure functionally meets basic requirements, it has some significant limitations in practical applications. Its high cost is mainly due to the need for specialized equipment such as replenishment pumps and venting devices, and the complex structural design, which makes the installation and maintenance of the system more difficult. Since the system contains many moving parts, its failure risk is also increased accordingly. Once a failure occurs, it may affect the normal operation of the entire system. The maintenance and operation of traditional devices require a high degree of expertise, which to some extent limits their application in certain specific scenarios and makes it difficult to fully meet the actual needs of high efficiency and reliability.

[0062] To address this, this application provides a battery device comprising: a battery cell, a heat exchanger, a circulation pipeline, and a fluid valve. The fluid valve is connected to the circulation pipeline; the fluid valve has a receiving cavity and a fluid channel communicating with the receiving cavity, which is connected to the circulation pipeline. Automatic control of the fluid channel is achieved by a float that changes with the liquid level. When gas is generated in the circulation pipeline, an exhaust function is automatically activated to discharge the gas and maintain a stable liquid level in the circulation pipeline, thereby ensuring the heat exchange fluid circulation efficiency and thus ensuring the heat exchange efficiency between the heat exchanger and the battery cell, i.e., maintaining the temperature control stability of the battery cell and reducing the risk of thermal runaway. Furthermore, the fluid valve has a simple structure, small size, and low cost.

[0063] The technical solutions described in the embodiments of this application are applicable to battery devices, electrical devices using battery devices, and energy storage devices using battery devices.

[0064] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0065] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0066] As an example, the battery cell 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 batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0067] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage devices that use the battery device as an energy storage element. Electrical devices include, for example, vehicles, ships, and spacecraft; spacecraft include, for instance, aircraft, rockets, space shuttles, and spacecraft.

[0068] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings. The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0069] For ease of description, this application uses the application of a battery device in a vehicle as an example for illustration.

[0070] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 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. A battery device 100 is provided inside the vehicle 1000, and 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 controller 200 and a motor 300. The controller 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.

[0071] 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.

[0072] Firstly, please refer to Figures 2 to 11 Some embodiments of this application provide a battery device, which includes: a battery cell 110, a heat exchanger 130, a circulation pipeline 140, and a fluid valve 150.

[0073] The heat exchanger 130 cooperates with the battery cell 110. Specifically, the heat exchanger 130 is used for heat exchange with the battery cell 110 to keep the temperature of the battery cell 110 within a suitable range. Optionally, the heat exchanger 130 may be, but is not limited to, a water-cooled plate.

[0074] The circulation pipe 140 is connected to the heat exchanger 130; the circulation pipe 140 is used to contain the heat exchange fluid, which can flow directionally within the heat exchange pipe; specifically, the liquid cooler 160 circulates the heat exchange fluid into the heat exchange pipe, and the circulation pipe 140 circulates the heat exchange fluid to the heat exchanger 130, ensuring that the heat exchanger 130 can exchange heat with the battery cell 110.

[0075] The fluid valve 150 is connected to the circulation pipeline 140. The fluid valve 150 has a receiving cavity 151 and a fluid passage 152 communicating with the receiving cavity 151. The receiving cavity 151 is connected to the circulation pipeline 140. Optionally, the fluid valve 150 is located at a higher position or at the top of the circulation pipeline 140 so that the gas in the circulation pipeline 140 can effectively enter the receiving cavity 151 of the fluid valve 150.

[0076] The fluid valve 150 is equipped with a float 155, which can move within the receiving cavity 151 and can block the fluid passage 152. The density of the float 155 is less than the density of the heat exchange fluid in the circulation pipe 140. Optionally, the float 155 is a hollow structure.

[0077] During the use of the battery device, such as Figure 7 As shown, the heat exchange fluid in the circulation pipe 140 fills the receiving cavity 151, and the float 155 seals the fluid passage 152 under the buoyancy of the heat exchange fluid; Figure 8 As shown, when gas enters the circulation pipe 140, the gas gradually enters the containment chamber 151, causing the liquid level of the heat exchange fluid in the containment chamber 151 to gradually decrease. The float 155 descends with the liquid level, separating the float 155 from the fluid channel 152, thereby allowing the gas in the containment chamber 151 to be discharged from the fluid channel 152. As the gas in the containment chamber is discharged, the liquid level in the containment chamber 151 gradually rises. At this time, the float 155 gradually rises with the gradual rise of the liquid level, sealing the fluid channel 152 and completing the venting.

[0078] The float 155 in the fluid valve 150 automatically controls the fluid channel 152 according to the liquid level change. It can automatically open the venting function when gas is generated in the circulation pipeline 140. When the liquid level rises, the float 155 returns to its original position to seal the fluid channel 152, realizing efficient venting of the pipeline and dynamic balance of the liquid. This avoids the impact of gas in the heat exchanger 130 on the heat exchange efficiency (gas will form a gas film or gas cavity on the inner wall of the heat exchanger, building a thermal resistance barrier; at the same time, gas exists in the heat exchange medium in the form of bubbles, which can block the flow channel, causing gas blockage, flow field pulsation, and disrupting the uniform distribution of the heat exchange liquid). This ensures the heat exchange efficiency between the heat exchanger 130 and the battery cell 110, that is, maintains the temperature control stability of the battery cell 110 and reduces the risk of thermal runaway. In addition, the fluid valve 150 has a simple structure, small size, and low cost.

[0079] refer to Figure 3 , Figure 3 This is a partially exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 110, which are connected in series, parallel, or mixed connection via busbars.

[0080] In some embodiments, the multiple battery cells 110 in the battery device 100 can be electrically connected through a busbar to achieve parallel, series, or mixed connection of the multiple battery cells 110 in the battery device 100.

[0081] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 110; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 110 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 110 together with cable ties.

[0082] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 120 and one or more individual battery cells housed within the housing 120.

[0083] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 120 by fixing the battery module in the housing 120.

[0084] As an example, the battery cell assembly can also be housed in the housing 120 by directly fixing multiple battery cells 110 to the housing 120.

[0085] As an example, the housing 120 may include an upper housing 1201 and a lower housing 1202. The upper housing 1201 and the lower housing 1202 are fastened together, forming a closed space inside the housing 120 to house the battery cell 110. Here, "closed" means covered or closed, and can be either sealed or unsealed.

[0086] As an example, the housing 120 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 120 forms an enclosed space to accommodate the battery cell assembly.

[0087] As an example, the housing 120 may be part of the chassis structure of the vehicle 1000. For example, the top cover of the housing 120 may be at least part of the floor of the vehicle 1000, or the frame of the housing 120 may be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0088] In some embodiments, battery device 100 refers to an energy storage device, which includes a housing 120, with a door on at least one side. The energy storage device includes energy storage containers, energy storage cabinets, etc., and the battery cells 110 in the energy storage device are used to store electrical energy.

[0089] In some embodiments of this application, the fluid channel 152 includes an exhaust channel 153 and a replenishment channel 154.

[0090] The float 155 automatically controls the venting channel 153 and the replenishment channel 154 according to the liquid level. When gas is generated in the circulation pipeline 140, the venting function is automatically activated to expel the gas, and at the same time, the replenishment channel 154 is opened to replenish the heat exchange fluid, keeping the liquid level in the circulation pipeline 140 stable. When the liquid level rises, the float 155 returns to its original position to seal the venting channel 153 and closes the replenishment channel 154 to avoid excessive liquid or gas residue. This achieves efficient venting, precise replenishment, and dynamic balance of the pipeline, thereby ensuring that there is sufficient heat exchange fluid in the circulation pipeline 140 and the heat exchanger 130, ensuring the heat exchange fluid circulation efficiency, and thus ensuring the heat exchange efficiency between the heat exchanger 130 and the battery cell 110, that is, maintaining the temperature control stability of the battery cell 110 and reducing the risk of thermal runaway.

[0091] In some embodiments of this application, the battery device 100 further includes a liquid replenishment tank 170.

[0092] The replenishment tank 170 is connected to both the venting channel 153 and the replenishment channel 154. Specifically, the venting channel 153 is connected to the replenishment tank 170 via the vent pipe 181, with the port of the vent pipe 181 inside the replenishment tank 170 being higher than the liquid level inside the replenishment tank 170; the replenishment channel 154 is connected to the replenishment tank 170 via the replenishment pipe 182, with the port of the replenishment pipe 182 inside the replenishment tank 170 being lower than the liquid level inside the replenishment tank 170; optionally, a device switch 190 is provided on the replenishment pipe 182, which can control the opening and closing of the replenishment pipe 182, closing it when it is necessary to clean the replenishment tank 170 or maintain the fluid valve 150.

[0093] When there is gas in the circulation pipe 140, the gas gradually enters the containment chamber 151, causing the liquid level of the heat exchange liquid in the containment chamber 151 to gradually decrease. The float 155 descends with the liquid level, separating the float 155 from the exhaust channel 153 and the replenishment channel 154. This allows the liquid in the containment chamber 151 to enter the replenishment tank 170 through the exhaust channel 153. At the same time, the heat exchange liquid in the replenishment tank 170 enters the containment chamber 151 through the replenishment channel 154 under the action of gravity. As the liquid level in the containment chamber 151 gradually rises, the float 155 gradually rises, causing the float 155 to seal the exhaust channel 153 and the replenishment channel 154, closing the connection between the replenishment tank 170 and the circulation pipe 140, thus completing the venting and replenishment simultaneously.

[0094] like Figures 6 to 8 As shown, in some embodiments of this application, the receiving cavity 151 includes a top wall 1511 and a side wall 1512 surrounding the top wall 1511, a liquid replenishment channel 154 is disposed on the side wall 1512, and an exhaust channel 153 is disposed on the top wall 1511.

[0095] Since the gas density is much lower than that of the heat exchange fluid, it will naturally rise and accumulate within the containment cavity 151, eventually converging at the top wall 1511 of the cavity. By directly placing the exhaust channel 153 in this core accumulation area, the accumulated gas can be quickly discharged through the exhaust channel 153 without additional guidance.

[0096] The replenishment channel 154 is located on the side wall 1512. When the heat exchange fluid is replenished, it will flow naturally downward along the cavity wall, forming a stable liquid flow trajectory. This avoids the heat exchange fluid impacting the float 155, which could cause the float 155 to shake violently or deviate and get stuck, thus improving the reliability of the entire automatic control system.

[0097] In some embodiments of this application, such as Figure 10 As shown, the replenishment channel 154 and the exhaust channel 153 can be simultaneously provided on the top wall 1511, or, as... Figure 11 As shown, the replenishment channel 154 and the exhaust channel 153 can be simultaneously provided on the side wall 1512.

[0098] like Figures 7 to 9 As shown, in some embodiments of this application, the float 155 is provided with a sealing element 156 that cooperates with the fluid channel 152. The sealing element 156 can fit tightly with the fluid channel 152, ensuring the sealing effect of the fluid channel 152. Specifically, the sealing element can be independently selected from special sealing materials (such as corrosion-resistant and elastic materials) adapted to the fluid characteristics to ensure the reliability of the sealing element; at the same time, high-precision control (flatness, roughness, dimensional tolerance) can be achieved by machining the sealing surface of the sealing element to ensure a tight fit with the fluid channel.

[0099] like Figures 7 to 9 As shown, in some specific embodiments of this application, the sealing member 156 includes a sealing head 1561 and a connecting rod 1562. The sealing head 1561 is located in the fluid channel and presses against the sealing step of the fluid channel to seal the fluid channel. The connecting rod 1562 extends into the receiving cavity and is connected to the float 155. The fluid channel is disposed on the side wall 1512 of the receiving cavity 151. The fluid channel includes at least one of an exhaust channel 153 or a replenishment channel 154.

[0100] When the liquid level of the heat exchange fluid in the containment cavity 151 drops, the float 155, due to reduced buoyancy, drops synchronously with the liquid level. Its gravity pulls the connecting rod 1562, which is connected to it, away from its initial equilibrium position. The connecting rod 1562, as the transmission core, is fixed to the float 155 at one end and connected to the sealing head 1561 at the other end. The displacement of the rod directly causes the sealing head 1561 to change its posture, causing the sealing head 1561, which was originally tightly fitted with the sealing step, to tilt, forming an annular or local gap between it and the step. This gap becomes a channel for fluid (fluid is a fluid that has flowability and can continuously deform under external force, including liquids and gases) to pass through. Fluid can flow into or out of the containment cavity 151 along the gap until the liquid level rises again, causing the float 155 to float up. The connecting rod 1562 then resets, causing the sealing head 1561 to re-fit with the sealing step, the gap disappears, and the liquid replenishment and venting process automatically terminates.

[0101] The sealing system consists only of a float 155, a connecting rod 1562, a sealing head 1561, and a sealing step. It has no complex transmission mechanism, fewer parts, and direct connections. This design not only reduces assembly and maintenance difficulty but also significantly reduces the structural space required. It can flexibly adapt to the cavity layout of various miniaturized and integrated heat exchange systems without reserving extra space for complex transmissions.

[0102] The sealing head 1561 makes surface contact with the sealing step, and when under force, the pressure is evenly distributed throughout the entire contact area, rather than concentrated at a single point. This contact method effectively avoids seal failure caused by excessive local stress, while also ensuring a high degree of tightness between the sealing head 1561 and the step.

[0103] like Figure 7 and Figure 8 As shown, in some embodiments of this application, the battery device 100 further includes a spring 157.

[0104] Spring 157 is supported within the fluid channel and presses against the plug head 1561.

[0105] The preload of spring 157 is not an instantaneous force, but a constant thrust applied to the sealing head 1561. This force forces the sealing head 1561 to always maintain a tendency to fit against the sealing step. Since the sealing effect of the sealing head 1561 and the sealing step depends on the tight fit of the contact surfaces, the preload of spring 157 can make the two form a uniform and continuous clamping force, so that the sealing surfaces fit fully, thereby building a reliable sealing barrier to prevent the heat exchange fluid from penetrating from the contact surface.

[0106] like Figure 7 and Figure 8 As shown, in some embodiments of this application, the battery device 100 further includes a cap 158.

[0107] The cap 158 is disposed within the fluid channel and has a through hole 1581 extending through it, and the spring 157 is supported between the plug head 1561 and the cap 158.

[0108] The cap 158 provides an axial fixing reference for the spring 157. One end of the spring 157 is tightly pressed against the support surface, while the other end acts on the sealing head 1561. This design ensures that the spring 157 is always in a preset axial compression state, preventing radial skew, twisting, or even bending of the spring 157 due to loosening or misalignment of the support point. The cap 158 adopts a threaded or snap-fit ​​design and is set as an independent component within the fluid channel without complex structural binding. When the spring 157 experiences fatigue decay, the sealing surface of the sealing head 1561 wears, or the seal needs to be replaced, the cap 158 can be unscrewed with simple tools to directly access the core sealing components such as the spring 157 and the sealing head 1561, allowing for quick maintenance and replacement operations, making maintenance more efficient and safer.

[0109] like Figure 7 and Figure 8 As shown, in some embodiments of this application, a filter screen 159 is provided inside the through hole 1581.

[0110] The filter 159 continuously filters impurities, ensuring that the fluid entering the containment chamber 151 remains clean and that the fluid channel does not narrow or become blocked due to impurity accumulation. This allows the replenishment process to proceed smoothly, ensuring that the system liquid level is replenished in a timely manner, guaranteeing the normal operation of the circulation pipeline 140 and the heat exchanger 130, and preventing a decrease in system efficiency caused by poor replenishment.

[0111] like Figures 7 to 9As shown, in some embodiments of this application, the sealing member 156 is located in the receiving cavity 151 and presses against the port of the fluid channel to block the fluid channel, which includes at least one of the exhaust channel 153 or the replenishment channel 154; optionally, a portion of the sealing member 156 may be inserted into the fluid channel.

[0112] When the liquid level in the receiving cavity 151 drops, the float 155 moves downwards synchronously due to reduced buoyancy. The float 155 directly moves the sealing component 156, causing it to displace and removing the component that was originally blocking the fluid channel from its sealed position, thus creating a closed loop between the fluid channel and the receiving cavity 151. At this time, the gas accumulated in the receiving cavity 151 will be discharged from the fluid channel. Simultaneously, external heat exchange fluid can flow into the receiving cavity 151 through the fluid channel, completing the replenishment of the circulation pipeline 140 and achieving synchronous coordination of replenishment and venting. When the liquid level rises back to the preset height, the buoyancy of the float 155 increases, causing the sealing component 156 to reset and reseal the fluid channel, automatically terminating the replenishment and venting process. The entire process requires no external intervention, relying entirely on the liquid level following characteristics of the float 155 to form a closed-loop control, ensuring that the replenishment volume matches the system requirements while preventing gas stagnation.

[0113] The sealing component 156 is directly linked to the float 155, resulting in fewer components and a shorter transmission path. With no redundant structures, the overall size is compact, eliminating the need for additional installation space for complex transmission mechanisms and improving the overall space utilization of the system.

[0114] In some embodiments of this application, the sealing element 156 is an elastic element.

[0115] Under pre-pressure, the elastic sealing component 156 undergoes adaptive elastic deformation. Its material flows along the microscopic contours of the sealing surface, precisely filling scratches, pits, and other defects. Simultaneously, it conforms to uneven sealing surfaces, transforming the originally discontinuous contact surface into a continuous, dense sealing band. This "flexible fit" characteristic allows the sealing system to achieve reliable sealing without pursuing extreme processing precision, significantly reducing processing costs and eliminating the risk of leakage caused by processing errors at the source.

[0116] like Figure 9 As shown, in some embodiments of this application, a through groove 1551 is provided on the outer surface of the float 155, and the groove 1551 forms a fluid channel with the cavity wall of the receiving cavity 151. Optionally, four through grooves 1551 are provided around the float 155, and the float 155 adopts a cylindrical design, which can float stably in the liquid; optionally, the float 155 is provided with a mating hole 1552 for connecting with the sealing member 156, and optionally, the float 155 is provided with a mating groove 1553 for connecting with the connecting rod 1562.

[0117] The smooth inner wall and straight path of the channel formed by the groove 1551 effectively guide the liquid to flow axially, avoiding turbulence, vortices, or impact losses caused by path bends and narrow spaces when the liquid passes through the float 155. The liquid flow within the groove 1551 is more stable, and energy loss is significantly reduced. At the same time, the width and depth of the groove 1551 can be designed according to the liquid replenishment requirements, avoiding the throttling effect caused by the liquid being too narrow, further reducing flow resistance, and allowing the liquid to pass through quickly with less energy consumption.

[0118] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0119] Please refer to the following: Figures 4 to 8 As shown, according to some embodiments of this application, this application provides a battery device 100 including: a battery cell 110, a heat exchanger 130, a circulation pipeline 140, a fluid valve 150, and a replenishment tank 170.

[0120] The fluid valve 150 is connected to the circulation pipeline 140. The fluid valve 150 has a receiving cavity 151 and a fluid passage 152 communicating with the receiving cavity 151.

[0121] The fluid valve 150 is equipped with a float 155, which can move within the receiving cavity 151. The density of the float 155 is less than the density of the heat exchange fluid in the circulation pipeline 140.

[0122] The float 155 is provided with a sealing element 156 that cooperates with the fluid channel 152.

[0123] The fluid channel 152 includes an exhaust channel 153 and a replenishment channel 154.

[0124] The accommodating cavity 151 includes a top wall 1511 and a side wall 1512 surrounding the top wall 1511. A liquid replenishment channel 154 is disposed on the side wall 1512, and an exhaust channel 153 is disposed on the top wall 1511.

[0125] The sealing element 156 that mates with the replenishment channel 154 includes a sealing head 1561 and a connecting rod 1562. The sealing head 1561 is located inside the replenishment channel 154 and presses against the sealing step of the replenishment channel 154 to seal the replenishment channel 154. The connecting rod 1562 extends into the receiving cavity and is connected to the float 155. The replenishment channel 154 is provided on the side wall 1512 of the receiving cavity 151.

[0126] The battery device 100 also includes a spring 157 and a cap 158.

[0127] Spring 157 is supported in the fluid replenishment channel 154 and presses against the plug head 1561.

[0128] A cap 158 is disposed within the replenishment channel 154 and has a through hole 1581 extending through it. A spring 157 is supported between the sealing head 1561 and the cap 158. A filter screen 159 is disposed within the through hole 1581.

[0129] The sealing element 156, which mates with the exhaust passage 153, is located inside the receiving cavity 151 and presses against the port of the exhaust passage 153 to seal the exhaust passage 153.

[0130] like Figure 1 As shown, in a second aspect, embodiments of this application provide an electrical device that includes a battery device according to any of the above-mentioned methods, the battery device being used to provide electrical energy.

[0131] It should be noted that the electrical device provided in this application embodiment has the beneficial effects of the battery device in any of the foregoing embodiments. For details, please refer to the foregoing description of the beneficial effects of the battery device. This application embodiment will not repeat the description.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. 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 therein. 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, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, The battery device includes: Battery cell; A heat exchanger, wherein the heat exchanger is used to exchange heat with the battery cell; A circulation pipeline, wherein the circulation pipeline is connected to the heat exchanger; and A fluid valve, which is connected to the circulation pipeline, has a receiving cavity and a fluid passage communicating with the receiving cavity; The fluid valve is equipped with a float that can move within the receiving cavity and block the fluid passage. The density of the float is less than the density of the heat exchange fluid in the circulation pipeline.

2. The battery device according to claim 1, characterized in that, The float is equipped with a sealing element that cooperates with the fluid channel.

3. The battery device according to claim 2, characterized in that, The sealing component includes a sealing head and a connecting rod. The sealing head is located inside the fluid channel and presses against the sealing step of the fluid channel to seal the fluid channel. The connecting rod extends into the receiving cavity and is connected to the float. The fluid channel is located on the side wall of the receiving cavity.

4. The battery device according to claim 3, characterized in that, Also includes: A spring, which is supported within the fluid channel and presses against the sealing head.

5. The battery device according to claim 4, characterized in that, Also includes: A cap is disposed within the fluid channel and has a through hole therethrough, and a spring is supported between the plug and the cap.

6. The battery device according to claim 5, characterized in that, A filter screen is installed inside the through hole.

7. The battery device according to claim 2, characterized in that, The sealing element is located within the receiving cavity and presses against the port of the fluid channel to seal the fluid channel.

8. The battery device according to claim 7, characterized in that, The sealing element is an elastic element.

9. The battery device according to any one of claims 1 to 8, characterized in that, The fluid channel includes an exhaust channel and a replenishment channel.

10. The battery device according to claim 9, characterized in that, Also includes: A replenishment tank, which is connected to both the exhaust channel and the replenishment channel.

11. The battery device according to claim 9, characterized in that, The accommodating cavity includes a top wall and a side wall surrounding the top wall. The liquid replenishment channel is disposed on the side wall, and the exhaust channel is disposed on the top wall.

12. The battery device according to any one of claims 1 to 8, characterized in that, The outer surface of the float is provided with a through groove, which forms a fluid channel with the cavity wall of the receiving cavity.

13. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 12.

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