Heat exchange assembly, battery apparatus, electric device and energy storage device

Abstract

Embodiments of the present disclosure provide a heat exchange assembly, a battery apparatus, an electric device, and an energy storage device. The battery apparatus comprises a case assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is arranged in the case assembly. The heat exchange assembly is used for heat exchange with the battery cell assembly. The heat exchange assembly comprises rigid connectors and at least two flexible members, wherein the at least two flexible members are stacked, a heat exchange flow channel is formed between the flexible members, and the heat exchange flow channel is used for conducting a heat exchange medium. Each rigid connector is provided with a connection channel, the rigid connectors are connected to the flexible members, and the connection channels are communicated with the heat exchange flow channel. The heat exchange assembly of the battery apparatus provided in the embodiments of the present disclosure can be communicated with the outside by means of the rigid connectors, thereby realizing heat exchange with the battery cell assembly; moreover, the energy density of the battery apparatus can be improved, and the degree of fit between the heat exchange assembly and the case assembly and / or the battery cell assembly can also be improved, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

Description

Heat exchange components, battery devices, electrical equipment, and energy storage devices

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202422077327.0, filed on August 26, 2024, entitled "Heat Exchange Component, Battery Device, Electrical Equipment and Energy Storage Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery device technology, and in particular to a heat exchange component, battery device, electrical equipment, and energy storage device. Background Technology

[0004] This section is intended to provide background or context for embodiments of this disclosure. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0005] In battery-powered new energy vehicles, the battery can provide all or part of the power. During battery use, the individual battery cells generate heat. If this heat is too high, it will adversely affect the battery's performance and lifespan. Therefore, how to effectively dissipate heat from the battery cells has become an important research direction in this field. Summary of the Invention

[0006] In view of this, the present disclosure aims to provide a heat exchange component, a battery device, an electrical device, and an energy storage device to solve the technical problem of how to improve the heat exchange effect.

[0007] Therefore, a first aspect of the present disclosure provides a battery device, comprising:

[0008] Enclosure assembly;

[0009] The battery cell assembly is housed within the housing assembly;

[0010] Heat exchange components are used to exchange heat with individual battery cells.

[0011] The heat exchange assembly includes a rigid connector and at least two flexible components. The at least two flexible components are stacked and a heat exchange channel is formed between the flexible components. The heat exchange channel is used to conduct the heat exchange medium. The rigid connector has a connection channel, which is connected to the flexible components and communicates with the heat exchange channel.

[0012] The battery device provided in this embodiment includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. The heat exchange assembly is provided with a rigid connector and at least two flexible members. The rigid connector is connected to the flexible members, so that the connection channel communicates with the heat exchange flow channel. That is, it can communicate with the outside through the rigid connector, allowing the heat exchange medium to enter the heat exchange flow channel through the connection channel, thereby achieving heat exchange with the battery cell assembly. In addition, the heat exchange assembly is provided with flexible members. The lightweight nature of the flexible components helps reduce the weight of the battery pack, lowers the production cost of the heat exchange components, and improves the energy density of the battery pack. Furthermore, the flexible structure of the flexible components allows for better fit between the heat exchange components and the housing and / or individual battery cells, thus facilitating the absorption of assembly tolerances. This eliminates the need for sealants or thermally conductive materials, improving the fit between the heat exchange components and the housing and / or individual battery cells, increasing the effective heat exchange area, and ultimately enhancing the heat exchange efficiency and performance of the heat exchange components.

[0013] In some embodiments, the flexible element has a connection port communicating with the heat exchange channel, and the rigid connector is thermally pressed to the inner wall of the flexible element at the edge of the connection port.

[0014] In this embodiment, the rigid connector is heat-pressed to the inner wall of the flexible component at the edge of the connection port to achieve a sealed connection between the rigid connector and the flexible component. This connection structure is simple and reliable, and the rigid connector can be heat-pressed to the inner wall of the flexible component at the edge of the connection port while the flexible component forms a heat exchange channel through heat pressing. This reduces assembly steps and improves assembly efficiency.

[0015] In some embodiments, the flexible element has a connection port communicating with the heat exchange channel, and the rigid connector includes a connection body and a connection ring, at least a portion of which is disposed within the heat exchange channel, and the connection ring is connected to the inner wall of the flexible element at the edge of the connection port.

[0016] In this embodiment, by configuring the rigid connector to include a connecting body and a connecting ring, the connecting body and the connecting ring together form a connecting channel. This facilitates the connection of the rigid connector to the flexible component through the connecting ring, improves the assembly efficiency of the connection between the rigid connector and the flexible component, and is applicable to rigid connectors with complex structures.

[0017] In some embodiments, the connecting ring is thermo-pressed to the inner wall of the flexible element at the edge of the connection port.

[0018] In this embodiment, the connecting ring is heat-pressed to the inner wall of the flexible component at the edge of the connection port to achieve a sealed connection between the connecting ring and the flexible component. This connection structure is simple and reliable, and the connecting ring can be heat-pressed to the inner wall of the flexible component at the edge of the connection port while the flexible component forms a heat exchange channel through heat pressing. This reduces assembly steps and improves assembly efficiency.

[0019] In some embodiments, one end of the connecting body extends into the connecting ring and is connected to the connecting ring.

[0020] This allows the rigid connector to connect to the flexible component via the connecting ring, and to the connecting body via the connecting ring, thereby achieving the connection between the rigid connector and the flexible component.

[0021] In some embodiments, one end of the connecting body extends into the connecting ring and is welded and / or glued to the connecting ring.

[0022] In this embodiment, one end of the connecting body extends into the connecting ring and is welded and / or glued to the connecting ring, which is a simple and reliable connection method.

[0023] In some embodiments, the circumferential sidewall of the connecting body forms a flange, and the flexible element is sandwiched between the flange and the connecting ring.

[0024] In this embodiment, by forming a flange on the circumferential sidewall of the connecting body and clamping the flexible component between the flange and the connecting ring, on the one hand, the flexible component can be clamped between the flange and the connecting ring, which further improves the connection reliability between the rigid connector and the flexible component; on the other hand, the flange can play a positioning role during the connection process between the connecting body and the connecting ring, thereby improving assembly efficiency.

[0025] In some embodiments, the flange is connected to the flexible element.

[0026] In this embodiment, by connecting the flange to the flexible component, the connection reliability between the rigid connector and the flexible component is improved, and the sealing performance between the rigid connector and the flexible component is also improved.

[0027] In some embodiments, the flange is thermo-pressed and / or adhesively bonded to the flexible element.

[0028] In this embodiment, the flange is heat-pressed to the outer wall of the flexible component at the edge of the connection, which facilitates a sealed connection between the flange and the flexible component. This connection structure is simple and reliable, and the flange can be heat-pressed to the outer wall of the flexible component at the edge of the connection while the flexible component forms a heat exchange channel through heat pressing. This reduces assembly steps and improves assembly efficiency.

[0029] In this embodiment, the flange is bonded to the outer wall of the flexible component at the edge of the connection, which facilitates a sealed connection between the flange and the flexible component. This connection structure is simple and reliable.

[0030] In some embodiments, the difference between the outer diameter of the flange and the outer diameter of the connecting ring is 0.2 mm to 30 mm.

[0031] In this embodiment, by setting the difference between the outer diameter of the flange and the outer diameter of the connecting ring to 0.2mm-30mm, it is beneficial to the connection between the flange and the flexible component, and can minimize the space occupied by the rigid connector. That is, it can balance the connection reliability between the rigid connector and the flexible component and reduce the space occupied.

[0032] In some embodiments, the difference between the outer diameter of the flange and the outer diameter of the connecting ring is 2mm-5mm.

[0033] In this embodiment, it is beneficial to further balance the connection reliability of rigid connectors and flexible components as well as reduce the space occupied.

[0034] In some embodiments, the size of the connection area between the connecting ring and the flexible element is greater than or equal to 0.2 mm along the radial direction of the connecting ring.

[0035] In this embodiment, by setting the size of the connection area between the connecting ring and the flexible component to be greater than or equal to 0.2 mm along the radial direction of the connecting ring, it is beneficial to improve the connection reliability between the connecting ring and the flexible component.

[0036] In some embodiments, the size of the connection area between the connecting ring and the flexible element is 1mm-30mm along the radial direction of the connecting ring.

[0037] In this embodiment, by setting the size of the connection area between the connecting ring and the flexible component to 1mm-30mm along the radial direction of the connecting ring, it is beneficial to improve the connection reliability between the connecting ring and the flexible component, and can minimize the space occupied by the connecting ring in the heat exchange channel, thereby improving the heat exchange efficiency. That is, it can balance the connection reliability between the connecting ring and the flexible component and reduce the space occupied.

[0038] In some embodiments, one end of the connecting body extends into the connecting ring and connects to the inner sidewall of the connecting ring; the dimension of the connecting body extending into the connecting ring is greater than or equal to 0.2mm-20mm.

[0039] In this embodiment, by setting the size of the connecting body extending into the connecting ring to 0.2mm-20mm, it is beneficial to the connection between the connecting body and the connecting ring, and can minimize the space occupied by the connecting ring in the heat exchange channel, thereby improving the heat exchange efficiency. That is, it can balance the connection reliability between the connecting body and the connecting ring and reduce the space occupied.

[0040] In some embodiments, a portion of the inner sidewall of the connecting ring extends radially inward to form a step, and the end of the connecting body abuts against the step.

[0041] In this embodiment, by forming a step inside the connecting ring, the end of the connecting body abuts against the step. In this way, on the one hand, the connection between the connecting body and the connecting ring is further improved by connecting the end of the connecting body with the step; on the other hand, the step can play a positioning role during the connection process between the connecting body and the connecting ring, thereby improving assembly efficiency.

[0042] In some embodiments, the step size is 0.2mm-10mm along the radial direction of the connecting ring.

[0043] In this embodiment, by setting the size of the step to 0.2mm-10mm along the radial direction of the connecting ring, it is beneficial to the connection between the connecting body and the connecting ring, as well as the structural strength of the step. It can also minimize the space occupied by the step in the heat exchange channel, thereby improving the heat exchange efficiency. In other words, it can balance the connection reliability between the connecting body and the connecting ring and reduce the space occupied.

[0044] In some embodiments, the step size is 0.5mm-3mm along the radial direction of the connecting ring.

[0045] This helps to further balance the connection reliability between the connecting body and the connecting ring, as well as reduce the space occupied.

[0046] In some embodiments, the step size is 0.2mm-10mm in a direction perpendicular to the radial direction of the connecting ring.

[0047] This approach allows the steps to have a certain structural strength while minimizing the space they occupy in the heat exchange channel, thereby improving heat exchange efficiency. In other words, it balances the structural strength of the steps with minimizing the space they occupy.

[0048] In some embodiments, the step size is 1mm-3mm in a direction perpendicular to the radial direction of the connecting ring.

[0049] This helps to further balance the structural strength of the steps with reducing the space occupied.

[0050] In some embodiments, the ends of the connecting body are welded and / or glued to the step.

[0051] In this embodiment, one end of the connecting body extends into the connecting ring and is welded to the connecting ring, which is a simple and reliable connection method.

[0052] Of course, in other embodiments, the connecting body and the connecting ring can also be glued together.

[0053] In some embodiments, the connecting body includes a first connecting segment and a second connecting segment. The extension direction of the first connecting segment is perpendicular to the radial direction of the connecting ring, and the extension direction of the second connecting segment is perpendicular to the extension direction of the first connecting segment. The first connecting segment is connected to the connecting ring.

[0054] In this embodiment, the rigid connector can be configured to include a connecting body and a connecting ring, which together form a connecting channel. This facilitates the connection between the rigid connector and the flexible component via the connecting ring and the connecting body, thereby improving the assembly efficiency of the connection between the rigid connector and the flexible component and making it suitable for rigid connectors with complex structures.

[0055] In some embodiments, the circumferential sidewall of the rigid connector forms a flange, which is connected to the outer wall of the flexible element at the edge of the connector.

[0056] In this embodiment, by forming a flange on the circumferential sidewall of the rigid connector, the flange can play a positioning role during the connection between the rigid connector and the flexible component, thereby improving assembly efficiency; and by connecting the flange to the outer wall of the flexible component at the edge of the connection port, it is beneficial to improve the connection reliability between the rigid connector and the flexible component.

[0057] In some embodiments, at least two flexible elements are configured as metal plasticized films.

[0058] In this embodiment, because the metal plasticized film is thin and lightweight, and because a flow channel region is formed between at least two metal plasticized films, it is not affected by the extrusion process and does not need to meet a large thickness requirement. Therefore, the overall thickness and weight of the heat exchange assembly can be reduced. Furthermore, the heat exchange assembly does not react with the internally flowing heat exchange medium, thus eliminating the risk of corrosion and leakage.

[0059] In some embodiments, at least two flexible elements are configured as aluminum-plastic films.

[0060] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0061] In some embodiments, the flexible element has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

[0062] In this embodiment, the flexible component, composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a flow channel region between at least two flexible components, it is unaffected by the extrusion process and does not need to meet large thickness requirements, thus reducing the overall thickness and weight of the heat exchange assembly. In addition, the heat exchange assembly does not react with the internally flowing heat exchange medium, therefore eliminating the risk of corrosion and leakage.

[0063] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0064] This allows flexible components to have a certain structural strength and to serve as an isolation mechanism.

[0065] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0066] This allows flexible components to have a certain degree of waterproofing.

[0067] In some embodiments, the non-metallic layer is a hot-melt layer.

[0068] Here, by setting the non-metallic layer as a hot-melt layer, that is, a hot-melt material, it is advantageous to combine the non-metallic layer and the metallic layer together through hot melting, which is simple to form and has high production efficiency.

[0069] In some embodiments, the flexible component has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the flow channel area than the corrosion-resistant layer.

[0070] In this embodiment, by configuring the flexible component to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, the waterproof layer is closer to the flow channel area than the corrosion-resistant layer, which helps to improve the reliability of the heat exchange component.

[0071] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0072] In this embodiment, by setting the thickness of the isolation layer to 6.5μm-100μm, the flexible component can have a certain structural strength and flexibility.

[0073] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0074] In this embodiment, by setting the thickness of the isolation layer to 6.5μm-15μm, the flexible component can be further made to have a certain structural strength and flexibility.

[0075] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0076] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5μm-20μm, the wear resistance and toughness of the flexible component can be improved.

[0077] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0078] In this embodiment, by setting the thickness of the waterproof layer to 50μm-120μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate the hot pressing connection of flexible components through the waterproof layer.

[0079] In some embodiments, the thickness of the flexible element is 0.05mm-0.3mm.

[0080] By setting the thickness of the flexible component to 0.05mm-0.3mm, the heat exchange assembly made of the flexible component has a certain structural strength while making the overall thickness of the heat exchange assembly small. This helps to reduce the overall volume and weight of the battery, thereby increasing the energy density of the battery.

[0081] In some embodiments, the thickness of the flexible element is 0.08mm-0.2mm.

[0082] By setting the thickness of the flexible component to 0.08mm-0.2mm, the heat exchange assembly made of the flexible component has a certain structural strength, while further reducing the overall thickness of the heat exchange assembly. This is beneficial to further reduce the overall volume and weight of the battery, thereby further increasing the energy density of the battery.

[0083] In some embodiments, the elastic modulus of the flexible element is 0.1 MPa-10000 MPa.

[0084] In this embodiment, by setting the elastic modulus of the flexible component to 0.1MPa-10000MPa, the flexible component has a certain structural strength, which improves the reliability of the heat exchange assembly and also has a certain deformation capacity. This can improve the fit between the heat exchange assembly and the housing assembly and / or the battery assembly and battery cell assembly, thereby increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery assembly and battery cell assembly, thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0085] A second aspect of this disclosure provides a heat exchange component, which is the heat exchange component of the battery device described above, and is used to exchange heat with a single battery cell assembly.

[0086] The heat exchange assembly provided in this embodiment features a rigid connector and at least two flexible components. The rigid connector is connected to the flexible components, allowing the connection channel to communicate with the heat exchange flow channel. This means the rigid connector can communicate with the outside, allowing the heat exchange medium to enter the heat exchange flow channel through the connection channel, thereby achieving heat exchange with the battery cell assembly. Furthermore, the inclusion of flexible components, which are lightweight, helps reduce the weight of the battery device, lowers the production cost of the heat exchange assembly, and improves the energy density of the battery device. Additionally, the flexible components have a flexible structure, allowing for better fit between the heat exchange assembly and the housing assembly and / or battery cell assembly. This helps to absorb assembly tolerances, eliminating the need for sealants or thermally conductive materials, improving the fit between the heat exchange assembly and the housing assembly and / or battery cell assembly, increasing the effective heat exchange area between them, and thus improving the heat exchange efficiency and effect of the heat exchange assembly.

[0087] A third aspect of this disclosure provides an electrical device, including the battery device or the heat exchange component described above.

[0088] The battery device for an electrical device provided in this disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. The heat exchange assembly is provided with a rigid connector and at least two flexible members. The rigid connector is connected to the flexible members to allow the connection channel to communicate with the heat exchange flow channel. That is, it can communicate with the outside through the rigid connector, allowing the heat exchange medium to enter the heat exchange flow channel through the connection channel, thereby achieving heat exchange with the battery cell assembly. In addition, the heat exchange assembly is configured to include flexible members. The lightweight nature of flexible components helps reduce the weight of the battery pack, lowers the production cost of the heat exchange components, and improves the energy density of the battery pack. Furthermore, the flexible structure of the components allows for better fit between the heat exchange components and the housing and / or individual battery cells, thus mitigating assembly tolerances and eliminating the need for sealants or thermally conductive materials. This enhances the fit between the heat exchange components and the housing and / or individual battery cells, increasing the effective heat exchange area and ultimately improving the heat exchange efficiency and performance.

[0089] A fourth aspect of this disclosure provides an energy storage device, including the battery device described above or the heat exchange component described above.

[0090] The battery device of the energy storage device provided in this embodiment includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. The heat exchange assembly is provided with a rigid connector and at least two flexible members. The rigid connector is connected to the flexible members to communicate with the heat exchange channel. That is, it can communicate with the outside through the rigid connector, allowing the heat exchange medium to enter the heat exchange channel through the connection channel, thereby achieving heat exchange with the battery cell assembly. In addition, the heat exchange assembly is configured to include flexible members. The lightweight nature of flexible components helps reduce the weight of the battery pack, lowers the production cost of the heat exchange components, and improves the energy density of the battery pack. Furthermore, the flexible structure of the components allows for better fit between the heat exchange components and the housing and / or individual battery cells, thus mitigating assembly tolerances and eliminating the need for sealants or thermally conductive materials. This enhances the fit between the heat exchange components and the housing and / or individual battery cells, increasing the effective heat exchange area and ultimately improving the heat exchange efficiency and performance. Attached Figure Description

[0091] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this disclosure;

[0092] Figure 2 is an exploded perspective view of a battery device provided in an embodiment of the present disclosure;

[0093] Figure 3 is a schematic diagram of the structure of a heat exchange component provided in an embodiment of the present disclosure;

[0094] Figure 4 is an exploded view of Figure 3;

[0095] Figure 5 is a top view of a heat exchange assembly provided in an embodiment of this disclosure;

[0096] Figure 6 is a cross-sectional view along the AA direction in Figure 5;

[0097] Figure 7 is a cross-sectional view of a heat exchange component provided in another embodiment of this disclosure, with the cross-sectional direction being the same as that in Figure 6;

[0098] Figure 8 is an exploded view of a rigid connector provided in an embodiment of this disclosure.

[0099] Explanation of reference numerals in the attached drawings: 10. Battery cell assembly; 11. Battery cell; 20. Housing assembly; 21. Housing body; 211. First housing section; 212. Second housing section; 22. Receiving cavity; 30. Heat exchange assembly; 31. Flexible component; 311. Heat exchange channel; 312. Connection port; 32. Rigid connector; 321. Connection channel; 322. Connection body; 3221. Flange; 3222. First connecting section; 3223. Second connecting section; 323. Connecting ring; 3231. Step; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0100] Unless otherwise specified, all embodiments and optional embodiments of this disclosure can be combined to form new technical solutions.

[0101] Unless otherwise specified, all technical features and optional technical features of this disclosure can be combined to form new technical solutions.

[0102] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0103] In this embodiment of the disclosure, 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.

[0104] 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 disclosed herein are not limited to this.

[0105] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, 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, prevents short circuits while allowing active ions to pass through.

[0106] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0107] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0108] In some implementations, the electrode assembly is a stacked structure.

[0109] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0110] 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.

[0111] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0112] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0113] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0114] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0115] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0116] In some embodiments, the battery cell 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 to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component 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.

[0117] 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 disclosure does not impose any particular limitations.

[0118] 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 have one or more.

[0119] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0120] In some embodiments, energy storage devices include energy storage containers, energy storage cabinets, etc.

[0121] During the use of a battery device, the individual battery cells generate heat. Excessive heat can negatively impact the performance and lifespan of the battery device. Therefore, effectively dissipating heat from the battery cells has become an important research direction in this field. Related technologies utilize a cooling system installed within the battery device housing to cool the individual battery cells. This cooling system may include multiple aluminum water-cooled plates laid within the battery device housing, with the surfaces of these plates in contact with the surfaces of the individual battery cells. During use, a heat exchange medium, such as water, flows through these water-cooled plates, carrying away heat from the battery cells and cooling them down. However, when the aluminum water-cooled plates in the cooling system do not adhere well to the surfaces of the battery cells, the heat exchange efficiency and effect are poor. Furthermore, assembly tolerance compensation and the use of sealant are required during assembly with the battery cell assembly, resulting in higher production costs. In addition, the water-cooling plate and battery pack are highly rigid and require the use of hard structural adhesive, making disassembly difficult. If self-adhesive, soft, or double-sided adhesive is used, the rigidity of the water-cooling plate and battery pack is relatively good, but when there are gaps and mismatches in flatness, there will be problems with the adhesive coming unglued.

[0122] Therefore, in order to improve the heat exchange efficiency and effect of the heat exchange assembly, this disclosure provides a battery device, which includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing assembly. The heat exchange assembly is used to exchange heat with the battery cell assembly. The heat exchange assembly includes a rigid connector and at least two flexible members, which are stacked and form heat exchange channels between them for conducting heat exchange medium. The rigid connector has a connection channel, which connects to the flexible members and communicates with the heat exchange channels.

[0123] The battery device provided in this embodiment includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed within the housing cavity of the housing assembly, which protects the battery cell assembly. The heat exchange assembly is provided with a rigid connector and at least two flexible members. The rigid connector is connected to the flexible members to allow the connection channel to communicate with the heat exchange flow channel. That is, it can communicate with the outside through the rigid connector, allowing the heat exchange medium to enter the heat exchange flow channel through the connection channel, thereby achieving heat exchange with the battery cell assembly. In addition, the heat exchange assembly is configured to include flexible members. The lighter weight of the component helps reduce the weight of the battery device, lowers the production cost of the heat exchange components, and improves the energy density of the battery device. In addition, the flexible component has a flexible structure with a certain deformation capacity, which allows the heat exchange components to fit and adapt better with the housing components and / or battery cells. This helps to absorb the assembly tolerances of the heat exchange components, improves the fit between the heat exchange components and the housing components and / or battery cells, and increases the effective heat exchange area between the heat exchange components and the housing components and / or battery cells, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange components.

[0124] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical devices include battery devices according to any embodiment of this disclosure, and the battery devices are used to provide electrical energy.

[0125] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This disclosure does not impose any special limitations on the above-mentioned electrical equipment.

[0126] It should be noted that the technical solutions described in this disclosure are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housing assemblies and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0127] Referring to Figure 1, a controller 200, a motor 300, and a battery device 100 can be installed inside the vehicle 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed 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's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000. In another embodiment of this disclosure, 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.

[0128] Referring to Figure 2, to meet different power demands, the battery device 100 includes a battery cell assembly 10, which may include multiple battery cells 11. A battery cell 11 is the smallest unit that makes up a module or package of the battery device 100. Multiple battery cells 11 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 11 are connected in both series and parallel connections. Multiple battery cells 11 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 11 is housed within a housing assembly 20. Alternatively, the battery device 100 can also be composed of multiple battery cells 11 first connected in series, parallel, or in a mixed configuration to form a battery device 100 module, and then these modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 20. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 11. Each battery cell 11 can be a secondary battery device 100 or a primary battery device 100; it can also be a lithium-sulfur battery device 100, a sodium-ion battery device 100, or a magnesium-ion battery device 100, but is not limited to these. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

[0129] This disclosure provides a battery device 100, which includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed within the housing assembly 20. The heat exchange assembly 30 is used to exchange heat with the battery cell assembly 10. The heat exchange assembly 30 includes a rigid connector 32 and at least two flexible members 31, which are stacked and a heat exchange channel 311 is formed between the flexible members 31 for conducting a heat exchange medium. The rigid connector 32 has a connection channel 321, which connects to the flexible members 31 and communicates with the heat exchange channel 311.

[0130] Referring to Figure 2, the battery device 100 includes a housing assembly 20 and a battery cell assembly 10. The battery cell assembly 10 includes at least one battery cell 11, which is disposed within the receiving cavity 22 of the housing assembly 20.

[0131] The enclosure component 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure component 20 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0132] The housing assembly 20 is used to encapsulate the battery cell assembly 10. The housing assembly 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell assembly 10.

[0133] For example, the enclosure assembly 20 is typically a cuboid structure, with both its length and width directions parallel to the horizontal plane. The length direction of the enclosure assembly 20 is parallel to the longest side of its cuboid structure. The height direction of the enclosure assembly 20 is perpendicular to the ground.

[0134] Please refer to Figures 3 to 7. This embodiment of the present disclosure provides a heat exchange component 30, which is the heat exchange component 30 of the battery device 100 provided in this embodiment of the present disclosure. The heat exchange component 30 is used to exchange heat with the battery cell assembly 10.

[0135] Here, the heat exchange component 30 is set inside the housing cavity 22 of the housing component 20, which means it can directly contact the battery cell component 10, which is beneficial to improving heat exchange efficiency and heat exchange effect.

[0136] The heat exchange assembly 30 includes at least two flexible elements 31, meaning that the number of flexible elements 31 included in the heat exchange assembly 30 can be two or more.

[0137] Here, the flexibility in flexible component 31 refers to the material properties of the structure. This type of property can be due to the material's light weight, or it can be due to at least one of the material's properties such as thickness, stiffness, strength, and elastic modulus. As an example, the material of flexible component 31 can be selected as a material that is lighter than conventional aluminum plates, steel plates, etc., and its flexibility can be controlled by the thickness, width, length, and type of material of flexible component 31. By setting the heat exchange assembly 30 in the form of flexible component 31 in this embodiment, it is beneficial to reduce the weight of heat exchange assembly 30.

[0138] At least two flexible elements 31 include a heat-sealing area, which is constructed by hot pressing the at least two flexible elements 31 together. The heat-sealing area separates the heat exchange assembly 30 to form a heat exchange channel 311 and a non-heat-sealing area. This means that the flexible elements 31 are hot-pressed to form the heat exchange channel 311 and the non-heat-sealing area. In other words, the heat-sealing area separates the heat exchange channel 311 and the non-heat-sealing area.

[0139] The heat exchange medium flows through the heat exchange channel 311 to exchange heat with the battery cell assembly 10.

[0140] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can achieve a cooling effect on the battery cell 11, such as being gaseous or liquid. In this embodiment, a coolant is used as an example for description.

[0141] For example, the heat exchange assembly 30 also includes a rigid connector 32 having a connection channel 321 for communicating with the outside. For example, the rigid connector 32 may be a pipeline for connecting to an air conditioning system or a liquid storage device such as a water tank in a vehicle or electrical equipment.

[0142] The rigid connector 32 can be an inlet connector, an outlet connector, or may include both an inlet connector and an outlet connector.

[0143] Here, the rigid connector 32 can be a metal part or a plastic part, etc., and the specific material is not limited here.

[0144] It should be noted that the specific number of heat exchange channels 311 is not limited here. There can be one or more.

[0145] In this disclosure, "multiple" refers to two or more items.

[0146] The principle of heat exchange component 30 for heat exchange of battery cell assembly 10 is as follows: the heat exchange medium output from the heat exchange medium source (not shown) enters the heat exchange flow channel 311 through the connection channel 321 of the rigid connector 32. After the heat exchange medium exchanges heat with the battery cell assembly 10, the heat exchange medium flows out through the connection channel 321 of the rigid connector 32, thus completing the heat exchange of the battery cell assembly 10.

[0147] Here, the heat exchange component 30 can exchange heat with the battery cell assembly 10 by either dissipating heat from the battery cell assembly 10 or by heating the battery cell assembly 10.

[0148] The principle of heat exchange component 30 for heat dissipation of battery cell component 10 is as follows: the heat exchange medium output from the heat exchange medium source enters the heat exchange flow channel 311 through the connection channel 321 of the rigid connector 32. After the heat exchange medium absorbs the heat generated during the operation of battery cell component 10, the heat exchange medium flows out through the connection channel 321 of the rigid connector 32, releasing the heat and completing the cooling and heat dissipation of battery cell component 10.

[0149] The principle of the heat exchange component 30 heating the battery cell assembly 10 is as follows: the heat exchange medium output from the heat exchange medium source enters the heat exchange flow channel 311 through the connection channel 321 of the rigid connector 32, and the heat exchange medium transfers heat to the battery cell assembly 10. After heating the battery cell assembly 10, the heat exchange medium flows out through the connection channel 321 of the rigid connector 32, thus completing the heating of the battery cell assembly 10.

[0150] The flexible component 31 is configured as a flexible structure. The flexible component 31 has certain expandable or contractible characteristics. It can also be understood that the flexible component 31 can be an elastically deformable structure. The flexible component 31 has the ability to deform and recover its deformation, so that the heat exchange assembly 30 can be formed into a contoured structure. The heat exchange assembly 30 can better adapt to the external contour shape of the battery cell or other components, so as to improve the fit between the heat exchange assembly 30 and the housing assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the housing assembly 20 and / or the battery cell assembly 10, and thus improving the heat exchange efficiency.

[0151] It should be noted that the flexible component 31 can have conductive properties, which is beneficial for equipotential setting; the flexible component 31 can also have electrical insulation properties, eliminating the need for insulation treatment, which helps reduce the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0152] The battery device provided in this embodiment includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The battery cell assembly 10 is disposed within the receiving cavity 22 of the housing assembly 20, which protects the battery cell assembly 10. The heat exchange assembly 30 is provided with a rigid connector 32 and at least two flexible members 31. The rigid connector 32 is connected to the flexible members 31, so that the connection channel 321 communicates with the heat exchange flow channel 311. That is, it can communicate with the outside through the rigid connector 32, so that the heat exchange medium can enter the heat exchange flow channel 311 through the connection channel 321, thereby realizing heat exchange with the battery cell assembly 10. In addition, the heat exchange assembly 30 is configured to include flexible members. 31. The flexible component 31 is lightweight, which helps to reduce the weight of the battery device 100, lower the production cost of the heat exchange component 30, and improve the energy density of the battery device 100. In addition, the flexible component 31 is a flexible structure with a certain deformation capability, which allows the heat exchange component 30 to fit and adapt better with the housing component 20 and / or the battery cell component 10. This helps to absorb the assembly tolerance of the heat exchange component 30, improve the fit between the heat exchange component 30 and the housing component 20 and / or the battery cell component 10, increase the effective heat exchange area between the heat exchange component 30 and the housing component 20 and / or the battery cell component 10, and thus improve the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0153] The housing assembly 20 is used to house the battery cell assembly 10, and the housing assembly 20 can have various structures. In some embodiments, referring to FIG2, the housing assembly 20 includes a housing body 21, which may include a first housing portion 211 and a second housing portion 212. The first housing portion 211 and the second housing portion 212 cover each other, and the first housing portion 211 and the second housing portion 212 together define a receiving cavity 22 for housing the battery cell assembly 10. The second housing portion 212 may be a hollow structure with one end open, and the first housing portion 211 may be a plate-like structure. The first housing portion 211 covers the open side of the second housing portion 212 to form a housing body 21 with a receiving cavity 22; the first housing portion 211 and the second housing portion 212 may also be hollow structures with one side open, and the open side of the first housing portion 211 covers the open side of the second housing portion 212 to form a housing body 21 with a receiving cavity 22. Of course, the first box portion 211 and the second box portion 212 can be of various shapes, such as cylinders, cuboids, etc.

[0154] To improve the sealing performance after the first housing part 211 and the second housing part 212 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 211 and the second housing part 212.

[0155] Assuming that the first box part 211 covers the top of the second box part 212, the first box part 211 can also be called the upper box cover, and the second box part 212 can also be called the lower box cover.

[0156] For example, the housing assembly 20 includes a bottom guard plate, which may be disposed at the bottom of the housing body 21. By providing the bottom guard plate, the heat exchange assembly 30 can be supported and protected.

[0157] It should be noted that the specific method of connecting the rigid connector 32 and the flexible component 31 is not limited here.

[0158] In some embodiments, please refer to Figures 2 to 7, the flexible member 31 is formed with a connection port 312 communicating with the heat exchange channel 311, and the rigid connector 32 is thermally pressed to the inner wall of the flexible member 31 at the edge of the connection port 312.

[0159] The flexible member 31 has a connection port 312 that communicates with the heat exchange channel 311, so that the rigid connector 32 can be connected to the flexible member 31 through the connection port 312, and the connection channel 321 communicates with the heat exchange channel 311.

[0160] Specifically, a portion of the rigid connector 32 can extend between at least two flexible members 31, that is, extend into the heat exchange channel 311, and be thermally pressed to the inner wall of the flexible member 31 at the edge of the connection port 312. In other words, a portion of the rigid connector 32 extends into the heat exchange channel 311 and is thermally pressed to the side wall of the heat exchange channel 311.

[0161] It is understandable that the rigid connector 32 and the flexible component 31 are heat-pressed together on the inner wall at the edge of the connection port 312. On the projection plane parallel to the plane where the connection port 312 is located, the projection of the connection port 312 is within the projection range of the area where the rigid connector 32 and the flexible component 31 are connected.

[0162] In this embodiment, the rigid connector 32 is heat-pressed to the inner wall of the flexible member 31 at the edge of the connection port 312 to achieve a sealed connection between the rigid connector 32 and the flexible member 31. This connection structure is simple and reliable, and the rigid connector 32 can be heat-pressed to the inner wall of the flexible member 31 at the edge of the connection port 312 while the flexible member 31 forms the heat exchange channel 311 through heat pressing. This reduces assembly steps and improves assembly efficiency.

[0163] Of course, in other embodiments, the inner wall of the rigid connector 32 and the flexible member 31 at the edge of the connection port 312 can also be glued together.

[0164] In some embodiments, referring to Figures 2 to 7, the flexible member 31 has a connection port 312 communicating with the heat exchange channel 311. The rigid connector 32 includes a connection body 322 and a connection ring 323, at least a portion of which is disposed within the heat exchange channel 311. The connection ring 323 is connected to the inner wall of the flexible member 31 at the edge of the connection port 312.

[0165] Here, the connecting ring 323 is connected to the inner wall of the flexible member 31 at the edge of the connecting port 312. Thus, on the projection plane parallel to the plane where the connecting port 312 is located, the projection of the connecting port 312 is within the projection range of the connecting ring 323. This facilitates the connection between the connecting ring 323 and the inner wall of the flexible member 31 at the edge of the connecting port 312.

[0166] Here, the connecting body 322 and the connecting ring 323 can be directly connected or indirectly connected. For example, the connecting body 322 is connected to the outer wall of the flexible member 31 at the edge of the connecting port 312, and the connecting ring 323 is connected to the inner wall of the flexible member 31 at the edge of the connecting port 312, thereby realizing the connection between the connecting body 322 and the connecting ring 323.

[0167] The rigid connector 32 includes a connecting body 322 and a connecting ring 323, which together form a connecting channel 321.

[0168] The connecting ring 323 is ring-shaped, and the internal space of the connecting ring 323 forms part of the connecting channel 321.

[0169] In related technologies, rigid connectors need to be heat-pressed after passing through the inside of the flexible component. The connection area between the rigid connector and the flexible component needs to be larger than the pipe diameter of the connecting body. This connection method is only suitable for straight pipes and not for complex rigid connectors with bends.

[0170] In this embodiment, by configuring the rigid connector 32 to include a connecting body 322 and a connecting ring 323, the connecting body 322 and the connecting ring 323 together form a connecting channel 321. In this way, the connecting body 322 can be connected to the connecting ring from the outside of the flexible member 31, instead of extending from the inside of the flexible member 31. This facilitates the connection between the rigid connector 32 and the flexible member 31 through the connecting ring 323 and the connecting body 322, thereby realizing the connection between the rigid connector 32 and the flexible member 31. This improves the assembly efficiency of the connection between the rigid connector 32 and the flexible member 31 and is applicable to rigid connectors with complex structures.

[0171] It should be noted that the specific connection method between the connecting ring 323 and the flexible component 31 is not limited here.

[0172] In some embodiments, as shown in Figures 3 to 7, the connecting ring 323 and the flexible member 31 are heat-pressed together on the inner wall at the edge of the connecting port 312.

[0173] The flexible member 31 has a connection port 312 that communicates with the heat exchange channel 311, so that at least a portion of the structure of the connecting ring 323 can be disposed within the flexible member 31 and connected to the flexible member 31, so that the connecting channel 321 communicates with the heat exchange channel 311.

[0174] Specifically, at least a portion of the connecting ring 323 can extend into the space between at least two flexible members 31, that is, into the heat exchange channel 311, and be thermally pressed to the inner wall of the flexible member 31 at the edge of the connection port 312. In other words, at least a portion of the connecting ring 323 extends into the heat exchange channel 311 and is thermally pressed to the side wall of the heat exchange channel 311.

[0175] It is understandable that the connecting ring 323 and the flexible member 31 are heat-pressed together on the inner wall at the edge of the connecting port 312. On the projection plane parallel to the plane where the connecting port 312 is located, the projection of the connecting port 312 is within the projection range of the area where the connecting ring 323 and the flexible member 31 are connected.

[0176] In this embodiment, the connecting ring 323 is heat-pressed to the inner wall of the flexible member 31 at the edge of the connection port 312 to achieve a sealed connection between the connecting ring 323 and the flexible member 31. This connection structure is simple and reliable, and the connecting ring 323 can be heat-pressed to the inner wall of the flexible member 31 at the edge of the connection port 312 while the flexible member 31 forms the heat exchange channel 311 through heat pressing. This can reduce assembly steps and improve assembly efficiency.

[0177] Of course, in other embodiments, the inner wall of the connecting ring 323 and the flexible member 31 at the edge of the connecting port 312 can also be glued together.

[0178] In some embodiments, please continue to refer to Figures 3 to 7, one end of the connecting body 322 extends into the connecting ring 323 and is connected to the connecting ring 323.

[0179] One end of the connecting body 322 extends into the connecting ring 323, that is, the main body of the connecting body 322 is located outside the flexible member 31 for communication with the outside.

[0180] Here, one end of the connecting body 322 extends into the connecting ring 323, which facilitates the connection between the outer wall of the connecting body 322 and the inner wall of the connecting ring 323.

[0181] It should be noted that the bottom surface of the connecting body 322 can be flush with or lower than the bottom surface of the connecting ring 323. In this way, the influence of the connecting body 322 on the heat exchange channel 311 can be minimized.

[0182] In this embodiment, one end of the connecting body 322 extends into the connecting ring 323 and connects with the connecting ring 323. This connection method is simple and reliable.

[0183] It should be noted that the specific connection method between the connecting body 322 and the connecting ring 323 is not limited here.

[0184] For example, the connecting body 322 and the connecting ring 323 can be welded, glued, or both welded and glued.

[0185] Of course, in other embodiments, the connecting body 322 may not extend into the connecting ring 323, but rather abut against the end face of the connecting ring 323, so that the end face of the connecting body 322 and the end face of the connecting ring 323 are connected by welding and / or adhesive bonding.

[0186] In some embodiments, as shown in Figures 3 to 7, the circumferential sidewall of the connecting body 322 forms a flange 3221, and the flexible member 31 is sandwiched between the flange 3221 and the connecting ring 323.

[0187] The flexible element 31 is sandwiched between the flange 3221 and the connecting ring 323, that is, the flange 3221 is located on the outside of the flexible element 31.

[0188] In this embodiment, by forming a flange 3221 on the circumferential sidewall of the connecting body 322 and clamping the flexible element 31 between the flange 3221 and the connecting ring 323, on the one hand, the flexible element 31 can be clamped between the flange 3221 and the connecting ring 323 through the cooperation of the flange 3221 and the connecting ring 323, which further improves the connection reliability between the rigid connector 32 and the flexible element 31; on the other hand, during the connection process between the connecting body 322 and the connecting ring 323, the flange 3221 can play a positioning role, thereby improving assembly efficiency.

[0189] In some embodiments, as shown in Figures 3 to 7, the flange 3221 is connected to the flexible member 31.

[0190] The connection between flange 3221 and flexible member 31 means that the lower surface of flange 3221 is connected to the outer surface of flexible member 31.

[0191] In this embodiment, by connecting the flange 3221 to the flexible member 31, the connection reliability between the rigid connector 32 and the flexible member 31 is improved, and the sealing performance between the rigid connector 32 and the flexible member 31 is also improved.

[0192] It should be noted that the specific way the flange 3221 is connected to the flexible component 31 is not limited here.

[0193] In some embodiments, the flange 3221 is thermo-pressed and / or adhesively bonded to the flexible element 31.

[0194] Here, the flange 3221 and the flexible part 31 can be connected by thermoforming, by adhesive bonding, or by both thermoforming and adhesive bonding.

[0195] In this embodiment, the flange 3221 is heat-pressed to the outer wall of the flexible member 31 at the edge of the connection port 312, which facilitates the sealing connection between the flange 3221 and the flexible member 31. This connection structure is simple and reliable, and the flange 3221 can be heat-pressed to the outer wall of the flexible member 31 at the edge of the connection port 312 while the flexible member 31 forms the heat exchange channel 311 through heat pressing. This reduces assembly steps and improves assembly efficiency.

[0196] In this embodiment, the flange 3221 is bonded to the outer wall of the flexible member 31 at the edge of the connection port 312 by adhesive bonding, which facilitates the sealing connection between the flange 3221 and the flexible member 31. This connection structure is simple and reliable.

[0197] In some embodiments, as shown in Figures 5 to 7, the difference between the outer diameter of the flange 3221 and the outer diameter of the connecting ring 323 is 0.2 mm to 30 mm.

[0198] The difference between the outer diameter of flange 3221 and the outer diameter of connecting ring 323 can be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 15mm, 18mm, 20mm, 22mm, 23mm, 25mm, 28mm, or 30mm, or any value between two of them.

[0199] The difference between the outer diameter of flange 3221 and the outer diameter of connecting ring 323 is 0.2mm-30mm. That is to say, along the radial direction of connecting ring 323, the size of flange 3221 is larger than the size of connecting ring 323.

[0200] In this embodiment, by setting the difference between the outer diameter of the flange 3221 and the outer diameter of the connecting ring 323 to 0.2mm-30mm, it is beneficial to the connection between the flange 3221 and the flexible member 31, and can minimize the space occupied by the rigid connector 32. That is, it can balance the connection reliability between the rigid connector 32 and the flexible member 31 and reduce the space occupied.

[0201] In some embodiments, as shown in Figures 5 to 7, the difference between the outer diameter of the flange 3221 and the outer diameter of the connecting ring 323 is 2 mm to 5 mm.

[0202] The difference between the outer diameter of flange 3221 and the outer diameter of connecting ring 323 can be any one of the following values ​​or any value between two: 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.2mm, 3.5mm, 3.6mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, and 5mm.

[0203] In this embodiment, it is beneficial to further balance the connection reliability between the rigid connector 32 and the flexible component 31 and reduce the space occupied.

[0204] In some embodiments, please continue to refer to Figures 5 to 7, along the radial direction of the connecting ring 323, the size of the connection area between the connecting ring 323 and the flexible member 31 is greater than or equal to 0.2 mm.

[0205] The size of the connection area between the connecting ring 323 and the flexible component 31 can be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 5mm, 10mm, 15mm, 18mm, 20mm, 25mm, 28mm, 30mm, 100mm, 300mm, 800mm, 1000mm, or any combination thereof, or a value larger than 1000mm.

[0206] Here, the connection area between the connecting ring 323 and the flexible member 31 is the end face of the connecting ring 323. The size of the connection area between the connecting ring 323 and the flexible member 31 can be the outer diameter of the connecting ring 323 minus the inner diameter of the connecting ring 323. Therefore, along the radial direction of the connecting ring 323, the size of the connection area between the connecting ring 323 and the flexible member 31 is greater than or equal to 0.2 mm, which is the outer diameter of the connecting ring 323 minus the inner diameter of the connecting ring 323 being greater than or equal to 0.2 mm.

[0207] In this embodiment, by setting the size of the connection area between the connecting ring 323 and the flexible member 31 to be greater than or equal to 0.2 mm along the radial direction of the connecting ring 323, it is beneficial to improve the connection reliability between the connecting ring 323 and the flexible member 31.

[0208] In some embodiments, please continue to refer to Figures 5 to 7. Along the radial direction of the connecting ring 323, the size of the connection area between the connecting ring 323 and the flexible member 31 is 1mm-30mm.

[0209] The size of the connection area between the connecting ring 323 and the flexible component 31 can be any one of the following values: 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 15mm, 18mm, 20mm, 22mm, 23mm, 25mm, 28mm, 30mm, or any combination thereof.

[0210] In this embodiment, by setting the size of the connection area between the connecting ring 323 and the flexible member 31 to 1mm-30mm along the radial direction of the connecting ring 323, it is beneficial to improve the connection reliability between the connecting ring 323 and the flexible member 31, and can minimize the space occupied by the connecting ring 323 in the heat exchange channel 311, thereby improving the heat exchange efficiency. In other words, it can balance the connection reliability between the connecting ring 323 and the flexible member 31 and reduce the space occupied.

[0211] In some embodiments, referring to Figures 5 to 7, one end of the connecting body 322 extends into the connecting ring 323 and connects to the inner sidewall of the connecting ring 323. The dimension of the connecting body 322 extending into the connecting ring 323 is greater than or equal to 0.2 mm and 20 mm.

[0212] The dimension of the connecting body 322 extending into the connecting ring 323 can be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 15mm, 18mm, or 20mm, or any value between two of them.

[0213] In this embodiment, by setting the size of the connecting body 322 extending into the connecting ring 323 to 0.2mm-20mm, it is beneficial to the connection between the connecting body 322 and the connecting ring 323, and can minimize the space occupied by the connecting ring 323 in the heat exchange channel 311, thereby improving the heat exchange efficiency. That is, it can balance the connection reliability between the connecting body 322 and the connecting ring 323 and reduce the space occupied.

[0214] In some embodiments, please refer to Figures 7 and 8, a portion of the inner sidewall of the connecting ring 323 extends radially inward to form a step 3231, and the end of the connecting body 322 abuts against the step 3231.

[0215] For example, the inner diameter of the step 3231 is greater than or equal to the inner diameter of the connecting body 322, so that the step 3231 will not obstruct the flow of the heat exchange medium between the connecting channel 321 and the heat exchange channel.

[0216] For example, step 3231 is formed at the bottom within connecting ring 323.

[0217] In this embodiment, by forming a step 3231 inside the connecting ring 323, the end of the connecting body 322 abuts against the step 3231. In this way, on the one hand, the connection between the connecting body 322 and the connecting ring 323 is further improved by connecting the end of the connecting body 322 with the step 3231; on the other hand, the step 3231 can play a positioning role during the connection process between the connecting body 322 and the connecting ring 323, thereby improving assembly efficiency.

[0218] In some embodiments, referring to Figures 7 and 8, the step 3231 has a size of 0.2 mm to 10 mm along the radial direction of the connecting ring 323.

[0219] Along the radial direction of the connecting ring 323, the dimension of the step 3231 can be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or any combination thereof.

[0220] In this embodiment, by setting the size of the step 3231 to 0.2mm-10mm along the radial direction of the connecting ring 323, it is beneficial to the connection between the connecting body 322 and the connecting ring 323, as well as the structural strength of the step 3231. It can also minimize the space occupied by the step 3231 in the heat exchange channel 311, thereby improving the heat exchange efficiency. In other words, it can balance the connection reliability between the connecting body 322 and the connecting ring 323 and reduce the space occupied.

[0221] In some embodiments, referring to Figures 7 and 8, the step 3231 has a size of 0.5 mm to 3 mm along the radial direction of the connecting ring 323.

[0222] Along the radial direction of the connecting ring 323, the dimension of the step 3231 can be any one of 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.5mm, 2.6mm, 2.8mm, 2.9mm, or 3mm, or a value between any two.

[0223] In this embodiment, by setting the size of the step 3231 to 0.5mm-3mm along the radial direction of the connecting ring 323, it is beneficial to further balance the connection reliability between the connecting body 322 and the connecting ring 323 and reduce the space occupied.

[0224] In some embodiments, referring to Figures 7 and 8, the step 3231 has a size of 0.2 mm to 10 mm in a direction perpendicular to the radial direction of the connecting ring 323.

[0225] Along the direction perpendicular to the radial direction of the connecting ring 323, the dimension of the step 3231 can be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or any value between two of them.

[0226] In this embodiment, by setting the size of the step 3231 to 0.2mm-10mm in the direction perpendicular to the radial direction of the connecting ring 323, it is beneficial to ensure that the step 3231 has a certain structural strength while minimizing the space occupied by the step 3231 in the heat exchange channel 311, thereby improving the heat exchange efficiency. In other words, the structural strength of the step 3231 and the space occupied can be balanced.

[0227] In some embodiments, referring to Figures 7 and 8, the step 3231 has a size of 1 mm to 3 mm in a direction perpendicular to the radial direction of the connecting ring 323.

[0228] Along the direction perpendicular to the radial direction of the connecting ring 323, the dimension of the step 3231 can be any one of 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm, or any value between two of them.

[0229] In this embodiment, by setting the size of the step 3231 to 1mm-3mm in a direction perpendicular to the radial direction of the connecting ring 323, it is beneficial to further balance the structural strength of the step 3231 and reduce the space occupied.

[0230] In some embodiments, the end of the connecting body 322 is welded and / or glued to the step 3231.

[0231] Here, by forming a step 3231 inside the connecting ring 323, the end of the connecting body 322 abuts against the step 3231, which facilitates the connection between the end of the connecting body 322 and the step 3231.

[0232] For example, the connecting ring 323 can be made of a light-transmitting material, i.e., a light-transmitting structural component, while the connecting body 322 can be made of a light-absorbing material. Laser welding is used, and the laser can pass through the connecting ring 323. The energy is absorbed and heated at the contact surface between the connecting body 322 and the connecting ring 323, which achieves the effect of heating and welding.

[0233] In this embodiment, one end of the connecting body 322 extends into the connecting ring 323 and is welded to the connecting ring 323. This connection method is simple and reliable.

[0234] Of course, in other embodiments, the connecting body 322 and the connecting ring 323 can also be glued together.

[0235] In some embodiments, please refer to Figures 3, 4 and 8. The connecting body 322 includes a first connecting segment 3222 and a second connecting segment 3223. The extending direction of the first connecting segment 3222 is perpendicular to the radial direction of the connecting ring 323, and the extending direction of the second connecting segment 3223 is perpendicular to the extending direction of the first connecting segment 3222. The first connecting segment 3222 is connected to the connecting ring 323.

[0236] Here, the first connecting segment 3222, the second connecting segment 3223, and the connecting ring 323 together form the connecting channel 321.

[0237] The connecting body 322 includes a first connecting segment 3222 and a second connecting segment 3223. The first connecting segment 3222 and the second connecting segment 3223 are connected and their extension directions are perpendicular, that is, the connecting body 322 has an L-shaped structure. This facilitates the connection of the rigid connector 32 with the flexible component 31 and the vehicle pipeline.

[0238] In this embodiment, the rigid connector 32 can be configured to include a connecting body 322 and a connecting ring 323, with the connecting body 322 and the connecting ring 323 forming a connecting channel 321. This facilitates the connection between the rigid connector 32 and the flexible component 31 via the connecting ring 323 and the connecting body 322 and the connecting ring 323, thereby improving the assembly efficiency of the connection between the rigid connector 32 and the flexible component 31 and making it suitable for rigid connectors with complex structures.

[0239] In some embodiments, as shown in Figures 3 to 8, the circumferential sidewall of the rigid connector 32 forms a flange 3221, which is connected to the outer wall of the flexible member 31 at the edge of the connector 312.

[0240] In this embodiment, by forming a flange 3221 on the circumferential sidewall of the rigid connector 32, the flange 3221 can play a positioning role during the connection between the rigid connector 32 and the flexible component 31, thereby improving assembly efficiency; and by connecting the flange 3221 to the outer wall of the flexible component 31 located at the edge of the connection port 312, it is beneficial to improve the connection reliability between the rigid connector 32 and the flexible component 31.

[0241] In some embodiments, at least two flexible elements 31 are configured as metal plasticized films.

[0242] The flexible component 31 is a single-layer or multi-layer thin film.

[0243] Here, the metal plastic film is a metal-plastic composite material, which includes a metal layer and a plastic layer.

[0244] In this embodiment, because the metal plasticized film is thin and lightweight, and because a heat exchange channel 311 is formed between at least two metal plasticized films, it is not affected by the extrusion process and does not need to meet a large thickness requirement. Therefore, the overall thickness and weight of the heat exchange assembly 30 can be reduced. Simultaneously, because the metal plasticized film has insulating properties, the risk of insulation failure can be reduced. This reduces the risk of the heat exchange assembly 30 reacting with the internally flowing heat exchange medium, further reducing the risk of heat exchange medium corrosion and leakage.

[0245] For example, at least two flexible elements 31 are configured as aluminum-plastic films.

[0246] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0247] In some embodiments, the flexible member 31 has a layered structure, and the flexible member 31 includes a metal layer and a non-metal layer, which are stacked sequentially.

[0248] Here, the flexible component 31 includes a metal layer and a non-metal layer, that is, a composite material component composed of a metal layer and a non-metal layer.

[0249] For example, the metal layer and the non-metal layer can be formed by hot pressing or hot melting.

[0250] Here, there is no limit to the number of metal layers and non-metal layers.

[0251] In this embodiment, the flexible element 31, which is composed of sequentially stacked metal and non-metal layers, is thin and lightweight. Furthermore, by forming a heat exchange channel 311 between at least two flexible elements 31, it is unaffected by the extrusion process and does not need to meet large thickness requirements, thus reducing the overall thickness and weight of the heat exchange assembly 30. In addition, the heat exchange assembly 30 does not react with the internally flowing heat exchange medium, therefore there is no risk of corrosion or leakage.

[0252] In some embodiments, the metal layer includes one or more of aluminum foil, copper foil, and steel foil.

[0253] By setting the metal layer to one or more of aluminum foil, copper foil, and steel foil, the flexible component 31 can have a certain structural strength and can play an isolation role.

[0254] In some embodiments, the non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

[0255] By setting the non-metallic layer to one or more of polypropylene, polyvinyl chloride and polyethylene, the flexible component 31 can have a certain waterproof function.

[0256] For example, a non-metallic layer of corrosion-resistant material with acid and alkali corrosion resistance can also be selected, or additives can be added to the non-metallic layer to make the non-metallic layer resistant to acid and alkali corrosion.

[0257] In some embodiments, the non-metallic layer is a hot-melt layer.

[0258] Here, by setting the non-metallic layer as a hot-melt layer, that is, a hot-melt material, it is advantageous to combine the non-metallic layer and the metallic layer together through hot melting, which is simple to form and has high production efficiency.

[0259] In some embodiments, the flexible member 31 has a layered structure, and the flexible member 31 includes a corrosion-resistant layer, an isolation layer and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel 311 than the corrosion-resistant layer.

[0260] Here, the corrosion-resistant layer can be a nylon layer made of nylon material, which has certain corrosion resistance properties, such as resistance to acid and alkali corrosion.

[0261] The isolation layer can be a metal layer, which can be one or more of aluminum foil, copper foil and steel foil, so that the flexible part 31 has a certain structural strength and can play an isolation role.

[0262] The waterproof layer can be a non-metallic layer, which can be one or more of polypropylene, polyvinyl chloride and polyethylene, so that the flexible part 31 can have a certain waterproof function.

[0263] In this embodiment, by setting the flexible component 31 to include a corrosion-resistant layer, an isolation layer and a waterproof layer arranged in sequence, the waterproof layer is closer to the heat exchange channel 311 than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange component 30.

[0264] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0265] The thickness of the isolation layer can be any one of the following values ​​or any value between two of the following: 6.5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 38μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, and 100μm.

[0266] In this embodiment, by setting the thickness of the isolation layer to 6.5μm-100μm, the flexible component 31 can have a certain structural strength and flexibility.

[0267] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0268] The thickness of the isolation layer can be any one of the following values, or any value between two of the following: 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11.8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, and 15μm.

[0269] In this embodiment, by setting the thickness of the isolation layer to 6.5μm-15μm, the flexible component 31 can be further made to have a certain structural strength and flexibility.

[0270] In some embodiments, the thickness of the corrosion-resistant layer is 5μm-20μm.

[0271] The thickness of the corrosion-resistant layer can be 5μm, 5.5μm, 5.8μm, 6μm, 6.5μm, 7μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.2μm, 9.5μm, 9.7μm, 10μm, 10.3μm, 10.5μm, 10.8μm, 11μm, 11.5μm, 11. Point values ​​of any one of the following: 8μm, 12μm, 12.3μm, 12.5μm, 13μm, 13.5μm, 14μm, 14.5μm, 15μm, 15.5μm, 16μm, 16.5μm, 17μm, 17.5μm, 18μm, 18.5μm, 18.7μm, 19μm, 19.5μm, and 20μm, or point values ​​between any two.

[0272] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5μm-20μm, the wear resistance and toughness of the flexible component 31 can be improved.

[0273] In some embodiments, the thickness of the waterproof layer is 50μm-120μm.

[0274] The thickness of the waterproof layer can be any one of the following values ​​or any combination of two: 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, and 120μm.

[0275] In this embodiment, by setting the thickness of the waterproof layer to 50μm-120μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate the hot pressing connection of the flexible component 31 through the waterproof layer.

[0276] In some embodiments, the thickness of the flexible element 31 is 0.05mm-0.3mm.

[0277] For example, the point value can be any one of 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.2mm, 0.21mm, 0.22mm, 0.25mm, 0.27mm, 0.28mm, or 0.3mm, or a point value between any two of them.

[0278] In this embodiment, by setting the thickness of the flexible element 31 to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible element 31 has a certain structural strength while the overall thickness of the heat exchange component 30 is small, which is beneficial to reduce the overall volume and weight of the battery device 100 and increase the energy density of the battery device 100.

[0279] In some embodiments, the thickness of the flexible element 31 is 0.08 mm to 0.2 mm.

[0280] For example, the point value can be any one of 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, or 0.2mm, or a point value between any two of them.

[0281] In this embodiment, by setting the thickness of the flexible element 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible element 31 has a certain structural strength, while further reducing the overall thickness of the heat exchange component 30. This is beneficial to further reduce the overall volume and weight of the battery device 100, thereby further increasing the energy density of the battery device 100.

[0282] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0283] For example, the elastic modulus of the flexible component 31 can be any one of 0.1MPa, 1MPa, 50MPa, 100MPa, 150MPa, 200MPa, 300MPa, 500MPa, 800MPa, 1000MPa, 1300MPa, 1500MPa, 1800MPa, 2000MPa, 2500MPa, 2800MPa, 3000MPa, 3500MPa, 4000MPa, 4500MPa, 5000MPa, 5500MPa, 6000MPa, 6500MPa, 7000MPa, 7500MPa, 8000MPa, 8500MPa, 8800MPa, 9000MPa, 9500MPa, 9700MPa, and 10000MPa, or a value between any two.

[0284] The elastic modulus describes the magnitude of a unit strain caused by a unit stress when a solid is subjected to force within a certain range; it is one of the fundamental physical quantities of materials. The larger the elastic modulus, the greater the stiffness and compressive strength of the material. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0285] In this embodiment, by setting the elastic modulus of the flexible component 31 to 0.1MPa-10000MPa, the flexible component 31 is made to have a certain structural strength, which improves the reliability of the heat exchange assembly 30, and also has a certain deformation capability. This can improve the fit between the heat exchange assembly 30 and the housing assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the housing assembly 20 and / or the battery cell assembly 10, and thus improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30.

[0286] In one specific embodiment, the flexible component 31 has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer sequentially arranged, with the waterproof layer positioned closer to the medium flow channel 32 than the corrosion-resistant layer. The thickness of the isolation layer is 6.5 μm-15 μm. The thickness of the corrosion-resistant layer is 5 μm-20 μm. The thickness of the waterproof layer is 50 μm-120 μm. The thickness of the flexible component 31 is 0.05 mm-0.3 mm. The elastic modulus of the flexible component 31 is 0.1 MPa-10000 MPa.

[0287] It should be noted that the outer diameter of flange 3221; the outer diameter of connecting ring 323; the dimensions of the connection area between connecting ring 323 and flexible member 31 along the radial direction of connecting ring 323; the dimensions of connecting body 322 extending into connecting ring 323; the dimensions of step 3231 along the radial direction of connecting ring 323; the dimensions of step 3231 in the direction perpendicular to the radial direction of connecting ring 323; and the thickness of flexible member 31 can be measured using micrometers, force gauges, calipers, or vernier calipers. It should be noted that all of the above measurements can be performed at room temperature and pressure.

[0288] The elastic modulus of the flexible component 31 can be measured by at least one of the following methods: static tensile testing, dynamic testing, sound velocity method, nanoindentation method, and bending method. The measuring instrument can include a nanoindenter and a universal testing machine.

[0289] For example, the elastic modulus of the flexible part 31 can be measured by nanoindentation under normal temperature and pressure. Nanoindentation uses a tiny indenter to indent the surface of the flexible part 31, and calculates the elastic modulus by analyzing the relationship between the indentation depth and the load.

[0290] In the description of this disclosure, references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this disclosure. In this disclosure, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine the different embodiments or examples described in this disclosure and the features of the different embodiments or examples without contradiction.

[0291] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure are included within the scope of protection of this disclosure.

Claims

1. A battery device, comprising: Enclosure assembly; A battery cell assembly is disposed within the housing assembly; A heat exchange assembly, wherein the heat exchange assembly is used to exchange heat with the battery cell assembly; The heat exchange assembly includes a rigid connector and at least two flexible components, which are stacked and form a heat exchange channel between them. The heat exchange channel is used to conduct heat exchange medium. The rigid connector has a connection channel, which is connected to the flexible components and communicates with the heat exchange channel.

2. The battery device according to claim 1, wherein, The flexible component has a connection port that communicates with the heat exchange channel, and the rigid connector is thermally pressed to the inner wall of the flexible component at the edge of the connection port.

3. The battery device according to claim 1, wherein, The flexible element has a connection port that communicates with the heat exchange channel. The rigid connector includes a connection body and a connection ring. At least a portion of the connection ring is disposed within the heat exchange channel. The connection ring is connected to the inner wall of the flexible element located at the edge of the connection port.

4. The battery device according to claim 3, wherein, The connecting ring is heat-pressed to the inner wall of the flexible component at the edge of the connection port.

5. The battery device according to claim 3, wherein, One end of the connecting body extends into the connecting ring and is connected to the connecting ring.

6. The battery device according to claim 5, wherein, The connecting body is welded to and / or glued to the connecting ring.

7. The battery device according to any one of claims 3-6, wherein, The circumferential sidewall of the connecting body forms a flange, and the flexible element is sandwiched between the flange and the connecting ring.

8. The battery device according to claim 7, wherein, The flange is connected to the flexible component.

9. The battery device according to claim 8, wherein, The flange is heat-pressed and / or glued to the flexible component.

10. The battery device according to claim 7, wherein, The difference between the outer diameter of the flange and the outer diameter of the connecting ring is 0.2mm-30mm.

11. The battery device according to claim 10, wherein, The difference between the outer diameter of the flange and the outer diameter of the connecting ring is 2mm-5mm.

12. The battery device according to any one of claims 3-11, wherein, Along the radial direction of the connecting ring, the dimension of the connection area between the connecting ring and the flexible member is greater than or equal to 0.2 mm.

13. The battery device according to claim 12, wherein, Along the radial direction of the connecting ring, the size of the connection area between the connecting ring and the flexible component is 1mm-30mm.

14. The battery device according to any one of claims 3-13, wherein, One end of the connecting body extends into the connecting ring and connects to the inner sidewall of the connecting ring; the dimension of the connecting body extending into the connecting ring is greater than or equal to 0.2mm-20mm.

15. The battery device according to any one of claims 3-14, wherein, A portion of the inner sidewall of the connecting ring extends radially inward to form a step, and the end of the connecting body abuts against the step.

16. The battery device according to claim 15, wherein, Along the radial direction of the connecting ring, the step has a size of 0.2mm-10mm.

17. The battery device according to claim 16, wherein, Along the radial direction of the connecting ring, the step has a size of 0.5mm-3mm.

18. The battery device according to any one of claims 15-17, wherein, The step has a size of 0.2mm-10mm in a direction perpendicular to the radial direction of the connecting ring.

19. The battery device according to claim 18, wherein, The step has a size of 1mm-3mm in a direction perpendicular to the radial direction of the connecting ring.

20. The battery device according to any one of claims 15-19, wherein, The end of the connecting body is welded and / or glued to the step.

21. The battery device according to any one of claims 3-20, wherein, The connecting body includes a first connecting segment and a second connecting segment. The extension direction of the first connecting segment is perpendicular to the radial direction of the connecting ring, and the extension direction of the second connecting segment is perpendicular to the extension direction of the first connecting segment. The first connecting segment is connected to the connecting ring.

22. The battery device according to any one of claims 2-21, wherein, The rigid connector has a flange formed on its circumferential sidewall, and the flange is connected to the outer sidewall of the flexible component at the edge of the connector.

23. The battery device according to any one of claims 1-22, wherein, The at least two flexible components are configured as metal plasticized films.

24. The battery device according to claim 23, wherein, The at least two flexible components are configured as aluminum-plastic films.

25. The battery device according to any one of claims 1-24, wherein, The flexible component has a layered structure, comprising a metal layer and a non-metal layer, which are stacked sequentially.

26. The battery device according to claim 25, wherein, The metal layer includes one or more of aluminum foil, copper foil, and steel foil.

27. The battery device according to claim 25 or 26, wherein, The non-metallic layer includes one or more of polypropylene, polyvinyl chloride, and polyethylene.

28. The battery device according to any one of claims 25-27, wherein, The non-metallic layer is a hot-melt layer.

29. The battery device according to any one of claims 1-28, wherein, The flexible component has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged sequentially, with the waterproof layer being closer to the heat exchange channel than the corrosion-resistant layer.

30. The battery device according to claim 29, wherein, The thickness of the isolation layer is 6.5μm-100μm.

31. The battery device according to claim 30, wherein, The thickness of the isolation layer is 6.5μm-15μm.

32. The battery device according to any one of claims 29-31, wherein, The thickness of the corrosion-resistant layer is 5μm-20μm.

33. The battery device according to any one of claims 29-32, wherein, The thickness of the waterproof layer is 50μm-120μm.

34. The battery device according to any one of claims 1-33, wherein, The thickness of the flexible component is 0.05mm-0.3mm.

35. The battery device according to claim 34, wherein, The thickness of the flexible component is 0.08mm-0.2mm.

36. The battery device according to any one of claims 1-35, wherein, The elastic modulus of the flexible component is 0.1 MPa-10000 MPa.

37. A heat exchange component, wherein the heat exchange component is the heat exchange component of the battery device according to any one of claims 1-36, the heat exchange component being used to exchange heat with the battery cell assembly.

38. An electrical device comprising a battery device according to any one of claims 1-36 or a heat exchange assembly according to claim 37.

39. An energy storage device comprising a battery device according to any one of claims 1-36 or a heat exchange assembly according to claim 37.

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