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

Abstract

The embodiment of the utility model provides a heat exchange assembly, a battery device, electric equipment and energy storage equipment. The battery device comprises a box body assembly, a battery monomer assembly and a heat exchange assembly, a first containing cavity is formed in the box body assembly. The battery monomer assembly is arranged in the first accommodating cavity; the heat exchange assembly is arranged in the box body assembly. The heat exchange assembly comprises at least two flexible parts. The at least two flexible parts are stacked, at least one medium flow channel is formed between the flexible parts, the at least one medium flow channel is used for conducting a heat exchange medium, and the heat exchange medium is used for performing heat exchange with the battery monomer assembly. According to the battery device provided by the embodiment of the invention, the energy density and the safety of the battery device can be improved, and in addition, the fitting degree of the heat exchange assembly and the box body assembly and / or the battery monomer assembly can be improved, so that the effective heat exchange area between the heat exchange assembly and the box body assembly and / or the battery monomer assembly is increased; and the heat exchange efficiency and the heat exchange effect of the heat exchange assembly are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a heat exchange component, a battery device, an electrical device, and an energy storage device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] In new energy vehicles equipped with battery systems, these systems can provide full or partial power. During use, the battery cells within the system generate heat. Excessive heat generation can adversely affect the performance and service life of the battery system. Therefore, effectively dissipating heat from the battery cells in battery systems has become an important research topic in this field. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a heat exchange component, a battery device, and an electrical device that can improve the heat exchange effect to a certain extent.

[0005] To this end, a first aspect of an embodiment of the present application provides a battery device, including:

[0006] The box assembly has a first accommodating cavity therein;

[0007] A battery cell assembly is disposed in the first accommodating cavity;

[0008] A heat exchange assembly is arranged in the box assembly; wherein, the heat exchange assembly includes at least two flexible parts, the at least two flexible parts are stacked, and at least one medium flow channel is formed between the flexible parts, the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

[0009] The battery device provided in the embodiment of the present application includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed in a first accommodating cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is also disposed in the housing assembly for exchanging heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible member, which is lightweight, thereby reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and increasing the energy density of the battery device. On the other hand, by configuring the heat exchange assembly to include a flexible structure, the heat exchange assembly can be better fitted to the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for caulking agent or thermally conductive material, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0010] In some embodiments, the heat exchange component is disposed outside the first accommodating cavity.

[0011] By arranging a heat exchange assembly on the outside of the first accommodating cavity, the heat exchange assembly is separated from the battery cell assembly, thereby preventing the heat exchange medium of the heat exchange assembly from leaking and contacting the battery cell assembly, thereby preventing the problem of battery short circuit, thereby improving the reliability of the battery.

[0012] In some embodiments, the box assembly includes a box body and a bottom guard plate, the box body includes a first box body part and a second box body part, a first accommodating cavity is formed between the first box body part and the second box body part, a second accommodating cavity is formed between the bottom wall of the second box body part and the bottom guard plate, and the heat exchange assembly is arranged in the second accommodating cavity.

[0013] By disposing a bottom guard plate on the outside of the box body, a second accommodating chamber is defined between the bottom guard plate and the second box body portion. The heat exchange assembly is disposed within the second accommodating chamber for heat exchange with the box body, thereby achieving heat exchange for the battery cell assembly carried within the box body. In other words, by disposing the heat exchange assembly outside the first accommodating chamber of the box assembly, the problem of battery short circuits caused by leakage of heat exchange medium from the heat exchange assembly can be avoided to a certain extent, thereby improving battery reliability, and the utilization rate of the accommodating chamber within the box assembly can be increased, thereby improving the compactness of the battery. Furthermore, by providing the bottom guard plate, the bottom guard plate cooperates with the box body to connect and protect the battery cell assembly, further improving the reliability of the box assembly.

[0014] In some embodiments, a portion of the bottom guard plate protrudes to form a circle of connecting portions, and the connecting portions are sealed to the second box portion.

[0015] The protruding connecting portion forms a circle, which not only connects to the second housing, but also defines a second accommodating cavity between the bottom guard plate and the second housing. Furthermore, the sealing connection between the connecting portion and the second housing prevents mud, sand, and water from entering the second accommodating cavity, thus protecting the heat exchange components within the second accommodating cavity.

[0016] In some embodiments, the box assembly further includes a seal, which is sealingly clamped between the connecting portion and the second box portion.

[0017] The seal is used to seal the gap between the connecting portion and the second box body portion, which is further beneficial to prevent mud, sand or water from entering the second accommodating cavity, thereby improving the sealing performance between the bottom guard plate and the second box body portion.

[0018] In some embodiments, the width of the seal is 2 mm-20 mm.

[0019] By setting the width of the seal to 2mm-20mm, it is beneficial to reduce costs while effectively improving the sealing performance between the bottom guard plate and the second box body.

[0020] In some embodiments, a portion of the bottom guard plate is protruding to form a limiting structure, and the limiting structure is used to support the heat exchange component.

[0021] In this embodiment, the bottom guard plate is used to support the heat exchange component by providing a limiting structure, which is beneficial to improving the stability of the heat conduction interface contact of the heat exchange component and further improving the thermal management performance of the heat exchange component.

[0022] In some embodiments, a portion of the bottom guard plate is protruding to form a limiting structure, and the heat exchange assembly is provided with an avoidance hole, and the limiting structure passes through the avoidance hole to support the second box body.

[0023] While supporting the second box body, the heat exchange component can also be positioned, thereby improving the stability of the heat exchange component.

[0024] In some embodiments, a portion of the second housing portion is protruding to form a limiting structure, and the limiting structure is used to support the heat exchange assembly.

[0025] It is beneficial to improve the stability of the heat-conducting interface contact of the heat exchange component, thereby improving the thermal management performance of the heat exchange component.

[0026] In some embodiments, a partial area of the second box body portion protrudes to form a limiting structure, and the heat exchange assembly is provided with an avoidance hole, and the limiting structure passes through the avoidance hole to support the bottom guard plate.

[0027] While supporting the bottom guard plate, the heat exchange assembly can also be positioned, thereby improving the stability of the heat exchange assembly. In addition, the bottom guard plate and the second box body can define a second accommodating cavity.

[0028] In some embodiments, the distance between the edge of the flexible member forming the avoidance hole and the limiting structure is 0.5 mm-1 mm.

[0029] While being able to position the heat exchange component, it is also beneficial to improve the assembly efficiency between the heat exchange component, the bottom guard plate and the box body.

[0030] In some embodiments, the height of the limiting structure is greater than or equal to the thickness of the heat exchange component.

[0031] The bottom guard plate and the second box body can be supported by a limiting structure, and the flexible heat exchange component can fill the gap between the bottom guard plate and the second box body. This is conducive to improving the problem of deformation of the second box body due to insufficient support strength when it is under pressure, thereby improving the problem of the heat exchange component being crushed due to the direct contact of the second box body with the heat exchange component, which is conducive to improving the stability of the thermal interface contact of the heat exchange component, and thus improving the thermal management performance of the heat exchange component.

[0032] In some embodiments, the limiting structure is provided in a central area of the second accommodating cavity.

[0033] While improving the supporting strength, it is also beneficial to improve the structural strength of the bottom guard plate and / or the second box body.

[0034] In some embodiments, the avoidance holes are provided in plurality, and the plurality of avoidance holes are symmetrically arranged relative to the center line of the heat exchange component.

[0035] In this embodiment, the plurality of avoidance holes are symmetrically arranged relative to the center line of the heat exchange component, that is, the corresponding limiting structures are also symmetrically arranged relative to the center line of the heat exchange component, thereby further improving the structural strength of the heat exchange component.

[0036] In some embodiments, the length extension direction of the avoidance hole is consistent with the arrangement direction of the multiple battery cells in the battery cell assembly.

[0037] In this embodiment, by setting the length extension direction of the avoidance hole to be consistent with the arrangement direction of the multiple battery cells in the battery cell assembly, it is beneficial to improve the structural strength and the heat exchange efficiency.

[0038] In some embodiments, the gap between the avoidance hole and the limiting structure in the length direction is greater than or equal to 0 and less than or equal to 5 mm.

[0039] The clearance between the avoidance hole and the limiting structure in the length direction is appropriate, which can meet the installation redundancy and is conducive to the assembly positioning of the heat exchange component.

[0040] In some embodiments, the gap between the avoidance hole and the limiting structure in the length direction is greater than or equal to 2 mm and less than or equal to 3 mm.

[0041] This is further conducive to achieving assembly and positioning of the heat exchange component while meeting installation redundancy. In some embodiments, the limiting structure can also be bonded to the second box portion through an adhesive layer.

[0042] In some embodiments, the at least two flexible members include a hot pressing region, wherein the hot pressing region is configured such that the at least two flexible members are formed by hot pressing, and the hot pressing region separates the heat exchange component to form the at least one medium flow channel.

[0043] In this embodiment, the flexible member is sealed by a hot pressing process, that is, a hot pressing area is formed by hot pressing, and the hot pressing area separates the heat exchange component to form at least one medium flow channel. This molding method is simple.

[0044] In some embodiments, the width of the hot pressing area is 0.5 mm-5 mm.

[0045] By setting the width of the hot pressing area to 0.5 mm-5 mm, it is beneficial to improve the reliability of the medium flow channel of the flexible part while also improving the coverage rate of the medium flow channel, thereby improving the heat exchange efficiency of the heat exchange component.

[0046] In some embodiments, the width of the hot pressing area is 2 mm to 3 mm.

[0047] By setting the width of the hot pressing area to 2mm-3mm, it is beneficial to improve the reliability of the medium flow channel of the flexible part while further improving the coverage of the medium flow channel, thereby further improving the heat exchange efficiency of the heat exchange component.

[0048] In some embodiments, the hot pressing area is provided with avoidance holes.

[0049] By providing an avoidance hole in the hot pressing area for avoiding the limiting structure, the structural strength of the hot pressing area is higher, which is beneficial to improving the reliability of the connection structure between the flexible part and the support part.

[0050] In some embodiments, the box assembly is provided with a limiting structure, the heat exchange assembly has a raised area and a recessed area, the medium flow channel is formed in the raised area, the recessed area is a non-medium flow channel area, and the limiting structure abuts against the recessed area.

[0051] In this embodiment, the housing assembly is provided with a retaining structure, and the heat exchange assembly has a raised area and a recessed area. The raised area forms a medium flow channel, while the recessed area is a non-medium flow channel area. The retaining structure abuts the recessed area. The heat exchange assembly is assembled and positioned by forming a medium flow channel in the raised area and abutting the retaining structure of the housing assembly against the recessed area.

[0052] In some embodiments, the recessed area of the flexible member has a penetrating avoidance hole, and the limiting structure is disposed in the avoidance hole.

[0053] In this embodiment, the heat exchange component avoids the limiting structure by providing an avoidance hole, and the limiting structure passes through the avoidance hole to position the heat exchange component, thereby improving the stability of the heat exchange component.

[0054] In some embodiments, a portion of the box assembly forms the limiting structure, and the limiting structure passes through the avoidance hole and abuts against another portion of the box assembly.

[0055] In this embodiment, the heat exchange component avoids the limiting structure by setting an avoidance hole, and the limiting structure passes through the avoidance hole to abut against another part of the box component. While supporting the other part of the box component, it can also position the heat exchange component, thereby improving the stability of the heat exchange component.

[0056] In some embodiments, the box assembly further includes an adhesive layer, and the limiting structure is bonded to another part of the box assembly via the adhesive layer.

[0057] In this embodiment, the heat exchange component is bonded to another part of the box component through the adhesive layer, which is beneficial to improving the fit between the heat exchange surface of the heat exchange component and the other part of the box component, thereby improving the heat exchange efficiency and heat exchange effect.

[0058] In some embodiments, the box assembly includes a box body and a bottom guard plate, the box body includes a first box body part and a second box body part, a first accommodating cavity is formed between the first box body part and the second box body part, a second accommodating cavity is formed between the bottom guard plate and the second box body part, the heat exchange assembly is arranged in the second accommodating cavity, and the limiting structure is formed on the side of the bottom guard plate and / or the second box body part close to the second accommodating cavity.

[0059] In this embodiment, a bottom guard plate is provided on the outside of the box body to define a second accommodating chamber between the bottom guard plate and the second box body portion. The heat exchange assembly is disposed within the second accommodating chamber for heat exchange with the box body, thereby achieving heat exchange for the battery cell assembly carried within the box body. In other words, by arranging the heat exchange assembly outside the first accommodating chamber of the box assembly, the problem of short circuiting the battery assembly due to leakage of the heat exchange medium from the heat exchange assembly can be avoided to a certain extent, thereby improving the reliability of the battery assembly and maximizing the utilization of the accommodating chamber within the box assembly, thereby increasing the compactness of the battery assembly. Furthermore, by providing the bottom guard plate, the bottom guard plate cooperates with the box body to connect and protect the battery cell assembly, further improving the reliability of the box assembly.

[0060] In some embodiments, the heat exchange assembly is disposed in the first accommodating cavity, and the limiting structure is formed on a side of the first box body and / or the second box body close to the first accommodating cavity.

[0061] The heat exchange assembly can be in direct contact with the battery cell assembly, which is beneficial to improving the heat exchange efficiency of the heat exchange assembly. The limiting structure of the box assembly abuts against the recessed area of the heat exchange assembly to achieve assembly positioning of the heat exchange assembly.

[0062] In some embodiments, the at least two flexible members are configured as metal plasticized films.

[0063] In this embodiment, the thin and lightweight metal-plasticized films, combined with the medium flow path formed between at least two of the films, are unaffected by the extrusion process and eliminate the need for strict thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0064] In some embodiments, the at least two flexible members are configured as aluminum-plastic films.

[0065] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0066] In some embodiments, the flexible member is a layered structure, and the flexible member includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0067] In this embodiment, the flexible member, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a medium flow channel between at least two flexible members, it is unaffected by the extrusion process and eliminates the need for strict thickness requirements, thereby reducing the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0068] In some embodiments, the metal layer includes one of aluminum foil, copper foil and steel foil.

[0069] The flexible part can have a certain structural strength and can play an isolation role.

[0070] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0071] The flexible part can be made waterproof to a certain extent.

[0072] In some embodiments, the non-metallic layer is a hot-melt layer.

[0073] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0074] In some embodiments, the flexible member is a layered structure, and includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the medium flow channel than the corrosion-resistant layer.

[0075] In this embodiment, by configuring the flexible member to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the medium flow channel than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange component.

[0076] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0077] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member can have a certain structural strength and flexibility.

[0078] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0079] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member can further have a certain structural strength and flexibility.

[0080] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm-20 μm.

[0081] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible component can be improved.

[0082] In some embodiments, the waterproof layer has a thickness of 50 μm-120 μm.

[0083] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible parts through the waterproof layer.

[0084] In some embodiments, the thickness of the flexible member is 0.05 mm-0.3 mm.

[0085] By setting the thickness of the flexible part to 0.05mm-0.3mm, the heat exchange component made of the flexible part has a certain structural strength while the overall thickness of the heat exchange component is smaller, which is beneficial to reducing the overall volume and weight of the battery to increase the energy density of the battery.

[0086] In some embodiments, the thickness of the flexible member is 0.08 mm-0.2 mm.

[0087] By setting the thickness of the flexible part to 0.08mm-0.2mm, the heat exchange component made of the flexible part has a certain structural strength, while the overall thickness of the heat exchange component is further reduced, which is conducive to further reducing the overall volume and weight of the battery, thereby further increasing the energy density of the battery.

[0088] In some embodiments, the elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

[0089] In this embodiment, by setting the elastic modulus of the flexible part to 0.1MPa-10000MPa, the flexible part can have a certain structural strength, thereby improving the reliability of the heat exchange component, and also have a certain deformation ability, which can improve the fit between the heat exchange component and the box component and / or the battery component battery cell component, thereby increasing the effective heat exchange area between the heat exchange component and the box component and / or the battery component battery cell component, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component.

[0090] A second aspect of an embodiment of the present application provides a heat exchange component, which includes at least two flexible parts, which are stacked and at least one medium flow channel is formed between the flexible parts. The at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the heat exchange monomer component.

[0091] The heat exchange assembly provided in the embodiment of the present application is arranged in the box assembly and is used to exchange heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of flexible parts, and the flexible parts are relatively light in weight, which is beneficial to reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and improving the energy density of the battery device; on the other hand, by setting the heat exchange assembly to include a flexible structure, the heat exchange assembly can be better fitted with the box assembly and / or the battery cell assembly, which is beneficial to absorbing the assembly tolerance of the heat exchange assembly, without the need for filler or thermal conductive material, thereby improving the fit between the heat exchange assembly and the box assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the box assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0092] In some embodiments, the heat exchange component is provided with an avoidance hole, and the avoidance hole runs through two opposite sides of the heat exchange component.

[0093] In this embodiment, the heat exchange component is provided with an avoidance hole to avoid the limiting structure, which is conducive to positioning the heat exchange component and improves the stability of the heat exchange component.

[0094] In some embodiments, the avoidance holes are provided in plurality, and the plurality of avoidance holes are symmetrically arranged relative to the center line of the heat exchange component.

[0095] In this embodiment, the plurality of avoidance holes are symmetrically arranged relative to the center line of the heat exchange component, that is, the corresponding limiting structures are also symmetrically arranged relative to the center line of the heat exchange component, thereby further improving the structural strength of the heat exchange component.

[0096] In some embodiments, the at least two flexible members include a hot pressing region, wherein the hot pressing region is configured such that the at least two flexible members are formed by hot pressing, and the hot pressing region separates the heat exchange component to form the at least one medium flow channel.

[0097] In this embodiment, the flexible member is sealed by a hot pressing process, that is, a hot pressing area is formed by hot pressing, and the hot pressing area separates the heat exchange component to form at least one medium flow channel. This molding method is simple.

[0098] In some embodiments, the width of the hot pressing area is 0.5 mm-5 mm.

[0099] In this embodiment, by setting the width of the hot pressing area to 0.5 mm-5 mm, it is beneficial to improve the reliability of the medium flow channel of the flexible part while also improving the coverage of the medium flow channel, thereby improving the heat exchange efficiency of the heat exchange component.

[0100] In some embodiments, the width of the hot pressing area is 2 mm to 3 mm.

[0101] In this embodiment, by setting the width of the hot pressing area to 2mm-3mm, it is beneficial to improve the reliability of the medium flow channel of the flexible part while also helping to further improve the coverage of the medium flow channel, thereby further improving the heat exchange efficiency of the heat exchange component.

[0102] In some embodiments, the hot pressing area is provided with avoidance holes.

[0103] By providing an avoidance hole in the hot pressing area for avoiding the limiting structure, the structural strength of the hot pressing area is higher, which is beneficial to improving the reliability of the connection structure between the flexible part and the support part.

[0104] In some embodiments, the heat exchange component has a raised area and a recessed area, the medium flow channel is formed in the raised area, the recessed area is a non-medium flow channel area, and the flexible member is hot-pressed in the recessed area.

[0105] In this embodiment, the box assembly is provided with a limiting structure, the heat exchange assembly has a raised area and a recessed area, a medium flow channel is formed in the raised area, the recessed area is a non-medium flow channel area, and the limiting structure abuts against the recessed area.

[0106] In this embodiment, the heat exchange component is provided with a raised area and a recessed area to form a medium flow channel in the raised area, and the limiting structure of the box component abuts against the recessed area to achieve assembly positioning of the heat exchange component.

[0107] In some embodiments, the recessed area is provided with a penetrating avoidance hole.

[0108] In this embodiment, the heat exchange component avoids the limiting structure by providing an avoidance hole, and the limiting structure passes through the avoidance hole to position the heat exchange component, thereby improving the stability of the heat exchange component.

[0109] In some embodiments, the at least two flexible members are configured as metal plasticized films.

[0110] In this embodiment, the thin and lightweight metal-plasticized film, coupled with the medium flow channel formed between at least two metal-plasticized films, is unaffected by the extrusion process and eliminates the need for strict thickness requirements. This reduces the overall thickness and weight of the heat exchange component. Furthermore, the insulating properties of the metal-plasticized film prevent the risk of insulation failure. The heat exchange component also avoids any reaction with the heat exchange medium flowing within, eliminating the risk of corrosion or leakage.

[0111] In some embodiments, the at least two flexible members are configured as aluminum-plastic films.

[0112] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0113] In some embodiments, the flexible member is a layered structure, and the flexible member includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0114] In this embodiment, the flexible member, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a medium flow channel between at least two flexible members, it is unaffected by the extrusion process and eliminates the need for strict thickness requirements, thereby reducing the overall thickness and weight of the heat exchange assembly. Furthermore, the heat exchange assembly does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0115] In some embodiments, the metal layer includes one of aluminum foil, copper foil and steel foil.

[0116] The flexible part can have a certain structural strength and can play an isolation role.

[0117] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0118] The flexible part can be made waterproof to a certain extent.

[0119] In some embodiments, the non-metallic layer is a hot-melt material.

[0120] Here, by setting the non-metallic layer to be a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer together through hot melting, which makes molding simple and has high production efficiency.

[0121] In some embodiments, the flexible member is a layered structure, and includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the medium flow channel than the corrosion-resistant layer.

[0122] In this embodiment, by configuring the flexible member to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the medium flow channel than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange component.

[0123] In some embodiments, the thickness of the isolation layer is 6.5 μm-100 μm.

[0124] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member can have a certain structural strength and flexibility.

[0125] In some embodiments, the thickness of the isolation layer is 6.5 μm-15 μm.

[0126] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member can further have a certain structural strength and flexibility.

[0127] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm-20 μm.

[0128] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible component can be improved.

[0129] In some embodiments, the waterproof layer has a thickness of 50 μm-120 μm.

[0130] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible parts through the waterproof layer.

[0131] In some embodiments, the thickness of the flexible member is 0.05 mm-0.3 mm.

[0132] In this embodiment, by setting the thickness of the flexible part to 0.05mm-0.3mm, the heat exchange assembly made of the flexible part has a certain structural strength while the overall thickness of the heat exchange assembly is smaller, which is beneficial to reducing the overall volume and weight of the battery device and increasing the energy density of the battery device.

[0133] In some embodiments, the thickness of the flexible member is 0.08 mm-0.2 mm.

[0134] In this embodiment, by setting the thickness of the flexible part to 0.08mm-0.2mm, the heat exchange component made of the flexible part has a certain structural strength, while the overall thickness of the heat exchange component is further made smaller, which is beneficial to further reduce the overall volume and weight of the battery device, thereby further increasing the energy density of the battery device.

[0135] In some embodiments, the elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

[0136] In this embodiment, by setting the elastic modulus of the flexible part to 0.1MPa-10000MPa, the flexible part can have a certain structural strength, thereby improving the reliability of the heat exchange component, and also have a certain deformation ability, which can improve the fit between the heat exchange component and the box component and / or the battery component battery cell component, thereby increasing the effective heat exchange area between the heat exchange component and the box component and / or the battery component battery cell component, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component.

[0137] A third aspect of an embodiment of the present application provides an electrical device, comprising the battery device or the heat exchange assembly described above.

[0138] The battery device of an electrical device provided in an embodiment of the present application includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed in a first accommodating cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is also disposed in the housing assembly for exchanging heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible member, which is lightweight, thereby reducing the weight of the battery device, reducing the production cost of the heat exchange assembly, and increasing the energy density of the battery device. On the other hand, by configuring the heat exchange assembly to include a flexible structure, the heat exchange assembly can be better fitted to the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for caulking agent or thermally conductive material, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0139] A fourth aspect of an embodiment of the present application provides an energy storage device, comprising the battery device or the heat exchange assembly described above.

[0140] The battery device of the energy storage device provided in the embodiment of the present application includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is arranged in the first accommodating cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is also arranged in the housing assembly for exchanging heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible member, which is lightweight, which helps to reduce the weight of the battery device, reduce the production cost of the heat exchange assembly, and improve the energy density of the battery device. On the other hand, by configuring the heat exchange assembly to include a flexible structure, the heat exchange assembly can be better fitted with the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, eliminating the need for caulking agent or thermal conductive material, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0141] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present disclosure;

[0142] Figure 2 This is a schematic exploded perspective view of a battery device according to an embodiment of the present disclosure, wherein the temperature balancing layer is omitted from the heat exchange assembly;

[0143] Figure 3 A cross-sectional view of a battery device according to an embodiment of the present disclosure;

[0144] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0145] Figure 5 A schematic diagram of the connection structure between a heat exchange assembly and a bottom guard plate according to an embodiment of the present disclosure, wherein the heat exchange assembly omits the temperature balancing layer;

[0146] Figure 6 The heat exchange assembly provided in one embodiment of the present disclosure is a schematic structural diagram in which the temperature equalization layer is omitted;

[0147] Figure 7 A schematic structural diagram of a bottom guard plate provided in one embodiment of the present disclosure;

[0148] Figure 8 This is a perspective exploded schematic diagram of a battery device provided in one embodiment of the present disclosure, wherein the first box portion is omitted;

[0149] Figure 9 A schematic structural diagram of a heat exchange assembly provided in a second embodiment of the present disclosure;

[0150] Figure 10 for Figure 9 Cross-sectional view in the middle BB direction;

[0151] Figure 11 for Figure 10 Enlarged view of point C in the middle;

[0152] Figure 12 This is a perspective exploded schematic diagram of a battery device provided in another embodiment of the present disclosure, wherein the heat exchange assembly is disposed in the first accommodation cavity;

[0153] Figure 13 A schematic structural diagram of a switch assembly provided in one embodiment of the present disclosure;

[0154] Figure 14 A schematic structural diagram of a switch assembly provided in another embodiment of the present disclosure, wherein the switch assembly includes a thermostat;

[0155] Figure 15 for Figure 14 The schematic diagram of the structure of the switch assembly after absorbing heat is shown;

[0156] Figure 16 A schematic structural diagram of a heat exchange layer provided in one embodiment of the present disclosure;

[0157] Figure 17 A schematic structural diagram of a heat exchange unit provided in one embodiment of the present disclosure;

[0158] Figure 18 for Figure 17 Cross-sectional view in the middle DD direction;

[0159] Figure 19A schematic diagram of the connection structure of a heat exchange unit, a connector, and a current collector provided in one embodiment of the present disclosure;

[0160] Figure 20 This is a perspective exploded schematic diagram of a battery device provided in yet another embodiment of the present disclosure, wherein the heat exchange assembly is disposed in the first accommodation cavity;

[0161] Figure 21 A schematic diagram of the connection structure between a connector and a quick-change connector provided in one embodiment of the present disclosure;

[0162] Figure 22 for Figure 21 sectional view of

[0163] Figure 23 This is an enlarged view of a cross-sectional view of a battery device provided in another embodiment of the present disclosure, wherein the second box portion forms a limiting structure.

[0164] Description of Reference Numerals

[0165] 10. Battery cell assembly; 11. Battery cell; 20. Box assembly; 21. Box body; 211. First box portion; 212. Second box portion; 22. Bottom guard plate; 221. Connecting portion; 222. Position limiting structure; 23. First accommodating cavity; 24. Second accommodating cavity; 30. Heat exchange assembly; 31. Flexible member; 311. Raised area; 312. Recessed area; 32. Medium flow channel; 33. Avoidance hole; 34. Hot pressing area; 35. Inlet; 36. Outlet; 37. Heat exchange layer; 371. Buffer cavity; 372. Heat exchange cell; 37 3. Current collector; 374. Connecting tube; 375. Connecting part; 3751. Connecting channel; 3752. Quick-change branch; 3753. Drain channel; 3754. Quick-change interface; 376. Quick-change connector; 3761. Connecting column; 3762. Baffle; 38. Temperature-equalizing layer; 381. Temperature-equalizing part; 39. Insulating layer; 391. Insulating cavity; 392. Flanging; 40. Switch assembly; 41. Connecting plate; 42. Control part; 43. Thermostat; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. DETAILED DESCRIPTION

[0166] Unless otherwise specified, all embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions.

[0167] Unless otherwise specified, all technical features and optional technical features disclosed herein can be combined with each other to form a new technical solution.

[0168] With the development of clean energy, more and more devices are using electricity as a driving force. Consequently, power batteries, such as lithium-ion batteries, that can store large amounts of electricity and undergo multiple charge and discharge cycles are rapidly developing. These 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 vehicles, as well as in aerospace and other fields.

[0169] In the embodiment of the present disclosure, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0170] The battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present disclosure.

[0171] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are intercalated and released 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.

[0172] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0173] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0174] In some embodiments, the electrode assembly is a laminate structure.

[0175] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0176] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0177] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0178] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0179] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0180] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0181] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0182] In some embodiments, the battery cell may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, when the outer shell is a non-sealed structure, the outer shell serves to protect the electrode assembly, and a sealing bag is further included between the outer shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. When the outer shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0183] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0184] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0185] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0186] In some embodiments, the energy storage equipment includes an energy storage container, an energy storage cabinet, etc.

[0187] Power plants are increasingly demanding higher area energy density for energy storage containers. Consequently, to increase the amount of electricity they can hold, the weight of the containers is also increasing. However, containers must be transported from production sites to their intended destinations by land and / or sea, and these transport methods often have weight restrictions. This creates a conflict between the increased energy density and the weight of the energy storage containers.

[0188] During the use of the battery device, the battery cells in the battery device will generate heat. If this heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, how to effectively dissipate heat from the battery cells of the battery device has become an important research direction in this field. In the related art, a cooling system is provided in the battery device box to cool the battery cells in the battery device. The above-mentioned cooling system may include multiple aluminum water-cooling plates laid in the battery device box, and the surfaces of the multiple water-cooling plates are in contact with the surfaces of the battery cells in the battery device. During use, a heat exchange medium such as water flows through the above-mentioned multiple water-cooling plates, thereby removing heat from the battery cells and cooling the battery cells. However, when the aluminum water-cooling plates in the above-mentioned cooling system do not fit well with the surfaces of the battery cells in the battery device, the heat exchange efficiency and heat exchange effect are poor. At the same time, when assembling with the battery cell assembly, assembly tolerance compensation and filling of caulking agent are required, and the production cost is high. In addition, the water-cooling plate and battery device box have high rigidity and require the use of hard structural adhesive, which makes disassembly difficult. If self-adhesive, soft or double-sided adhesive is used, the rigidity of the water-cooling plate and battery device box is relatively good, and when there is a gap and flatness mismatch, there will be problems with debonding.

[0189] In view of this, in order to improve the heat exchange efficiency and heat exchange effect of the heat exchange assembly, an embodiment of the present disclosure provides a battery device, which includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The housing assembly has a first accommodating cavity inside. The battery cell assembly is disposed in the first accommodating cavity. The heat exchange assembly is disposed in the housing assembly. The heat exchange assembly includes at least two flexible members. The at least two flexible members are stacked, and at least one medium flow channel is formed between the flexible members. The at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

[0190] The battery device provided by the embodiment of the present disclosure includes a housing assembly, a battery cell assembly, and a heat exchange assembly. The battery cell assembly is disposed in a first accommodating cavity of the housing assembly, and the housing assembly protects the battery cell assembly. The heat exchange assembly is also disposed in the housing assembly for exchanging heat with the battery cell assembly. On the one hand, the heat exchange assembly is made of a flexible member, which is lightweight, thereby reducing the weight of the battery device, lowering the production cost of the heat exchange assembly, and improving the energy density of the battery device. On the other hand, by configuring the heat exchange assembly to include a flexible structure with a certain degree of deformation, the heat exchange assembly can be better fitted and adapted to the housing assembly and / or the battery cell assembly, thereby absorbing the assembly tolerance of the heat exchange assembly, improving the fit between the heat exchange assembly and the housing assembly and / or the battery cell assembly, and increasing the effective heat exchange area between the heat exchange assembly and the housing assembly and / or the battery cell assembly, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly.

[0191] The technical solutions described in the embodiments of the present disclosure are applicable to electrical equipment using a battery device. The electrical equipment includes a battery device according to any embodiment of the present disclosure, and the battery device is used to provide electrical energy.

[0192] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric 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. The embodiments of the present disclosure do not impose any special restrictions on the above-mentioned electrical equipment.

[0193] It should be noted that the technical solutions described in the embodiments of the present disclosure are not limited to the battery devices described above, but can also be applied to all electrical equipment and energy storage equipment that include battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0194] Please refer to Figure 1 , a controller 200, a motor 300 and a battery device 100 may be provided inside the vehicle 1000, and the controller 200 is used to control the battery device 100 to power the motor 300. For example, the battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1000. In another embodiment of the present disclosure, the battery device 100 may not only be used as an operating power source for the vehicle 1000, but may also be used as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0195] See also Figure 2To meet different power requirements, the battery device includes a battery cell assembly 10, which can include multiple battery cells 11. A battery cell 11 is the smallest unit that makes up a battery device module or battery device pack. Multiple battery cells 11 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of multiple battery cells 11 connected in series and in parallel. Multiple battery cells 11 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery device 11 is housed within a housing assembly 20. Of course, the battery device 100 can also be a battery device module formed by first connecting multiple battery cells 11 in series, in parallel, or in a hybrid connection, and then the multiple battery device modules are further connected in series, in parallel, or in a hybrid connection to form a complete unit, which is then housed within the housing assembly 20. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar to electrically connect the multiple battery cells 11. Each battery cell 11 may be a secondary battery device or a primary battery device; it may also be a lithium-sulfur battery device, a sodium-ion battery device, or a magnesium-ion battery device, but is not limited to these. The battery cell 11 may be cylindrical, flat, rectangular, or in other shapes.

[0196] See also Figures 2 to 4 The present disclosure provides a battery device, which includes a housing assembly 20, a battery cell assembly 10, and a heat exchange assembly 30. The housing assembly 20 has a first accommodating cavity 23. The battery cell assembly 10 is disposed in the first accommodating cavity 23. The heat exchange assembly 30 is disposed in the housing assembly 20. The heat exchange assembly 30 includes at least two flexible members 31. Figure 3 At least two flexible members 31 are stacked, and at least one medium flow channel 32 is formed between the flexible members 31 . The at least one medium flow channel 32 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly 10 .

[0197] Please refer to Figure 2 as well as Figure 8 The battery device includes a box assembly 20 and a battery cell assembly 10 . The battery cell assembly 10 includes at least one battery cell 11 . The battery cell 11 is disposed in a first accommodating cavity 23 of the box assembly 20 .

[0198] The housing assembly 20 can be a simple three-dimensional structure such as a single rectangular parallelepiped, cylinder, or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as rectangular parallelepiped, cylinder, or sphere. The housing assembly 20 can be made of 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.

[0199] The box assembly 20 is used to encapsulate the battery cell assembly 10 . The box assembly 20 can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell assembly 10 .

[0200] For example, the box assembly 20 is generally a rectangular parallelepiped structure, the length and width directions of the box assembly 20 are parallel to the horizontal plane, and the length direction of the box assembly 20 is parallel to the longest side of the rectangular parallelepiped structure of the box assembly 20. The height direction of the box assembly 20 is perpendicular to the ground. For example, Figure 3 and Figure 7 As shown, the length direction of the box assembly 20 is represented by X, the width direction of the box assembly 20 is represented by Y, and the height direction of the box assembly 20 is represented by Z.

[0201] The present embodiment provides a heat exchange assembly 30, which includes at least two flexible members 31. The at least two flexible members 31 are stacked, and at least one medium flow channel 32 is formed between the flexible members 31. The at least one medium flow channel 32 is used to conduct a heat exchange medium, which is used to exchange heat with the battery cell assembly 10.

[0202] Here, the heat exchange component 30 is arranged in the box component 20, which means that the heat exchange component 30 can be arranged in the first accommodating cavity 23, that is, it can be in direct contact with the battery cell assembly 10, or it can be arranged outside the first accommodating cavity 23, and heat is transferred through the intermediate medium, thereby realizing heat exchange between the heat exchange component 30 and the battery cell assembly 10.

[0203] That the heat exchange assembly 30 includes at least two flexible members 31 means that the number of the flexible members 31 included in the heat exchange assembly 30 may be two or more than two.

[0204] Here, the flexibility of the flexible member 31 refers to the material properties of the structure. This type of property can be a property imparted to the material due to its light weight, or a property imparted to the material due to at least one of its properties, such as thickness, stiffness, strength, and elastic modulus. As an example, the material of the flexible member 31 can be selected to be a material that is lighter than conventional structures such as aluminum plates or steel plates, and its flexibility can be controlled by the thickness, width, length, and material type of the flexible member 31. By configuring the heat exchange assembly 30 as the flexible member 31 in the embodiment of the present disclosure, the weight of the heat exchange assembly 30 can be reduced.

[0205] At least one medium flow channel 32 is formed between at least two flexible members 31 , which means that the heat exchange assembly 30 forms a medium flow channel 32 between adjacent flexible members 31 . The heat exchange medium flows through the medium flow channel 32 to achieve heat exchange with the battery cell assembly 10 .

[0206] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can cool the battery cells 11. For example, it can be gaseous or liquid. In the embodiment of the present disclosure, the heat exchange medium is described as a cooling liquid.

[0207] Exemplarily, the heat exchange assembly 30 further includes an inlet 35 and an outlet 36 , both of which are in communication with the medium flow channel 32 .

[0208] Here, the inlet 35 and the outlet 36 of the heat exchange assembly 30 are used to connect to the pipelines of the air conditioning system or the water tank or other liquid storage device of the vehicle or electrical equipment.

[0209] It should be noted that the specific number of the medium flow channels 32 is not limited here and can be one or more.

[0210] The multiple mentioned in the embodiments of the present disclosure refers to a number of two or more.

[0211] The principle of heat exchange of the heat exchange component 30 for the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange medium source (not shown) enters the medium flow channel through the inlet 35 of the heat exchange component 30. After the heat exchange medium exchanges heat with the battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of the heat exchange component 30, completing the heat exchange of the battery cell assembly 10.

[0212] Here, the heat exchange assembly 30 exchanging heat with the battery cell assembly 10 may be to dissipate heat from the battery cell assembly 10 or to heat the battery cell assembly 10 .

[0213] The principle of heat dissipation of the battery cell assembly 10 by the heat exchange component 30 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel through the inlet 35 of the heat exchange component 30. After the heat exchange medium absorbs the heat generated during the operation of the battery cell assembly 10, the heat exchange medium flows out through the outlet 36 of the heat exchange component 30, releasing the heat, and completing the cooling and heat dissipation of the battery cell assembly 10.

[0214] The principle of the heat exchange component 30 heating the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange medium source enters the medium flow channel through the inlet 35 of the heat exchange component 30, 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 outlet 36 of the heat exchange component 30, completing the heating of the battery cell assembly 10.

[0215] The flexible part 31 is set as a flexible structure. The flexible part 31 has certain expandable or contractible characteristics. It can also be understood that the flexible part 31 can be an elastically deformable structure. The flexible part 31 has the ability to deform and restore deformation, so that the heat exchange component 30 can be formed into a contoured structure. The heat exchange component 30 can better adapt to the external contour shape of the battery cell or other components to improve the fit between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby improving the heat exchange efficiency.

[0216] It should be noted that the flexible part 31 can have conductive properties, which is conducive to maintaining an equipotential setting with the box assembly 20; the flexible part 31 can also have electrical insulation properties, without the need for insulation treatment, which is conducive to reducing the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0217] The battery device provided in the embodiment of the present disclosure includes a box assembly 20, a battery cell assembly 10 and a heat exchange assembly 30. The battery cell assembly 10 is arranged in the first accommodating cavity 23 of the box assembly 20, and the box assembly 20 protects the battery cell assembly 10. The heat exchange component 30 is also arranged in the box assembly 20 for exchanging heat with the battery cell assembly 10. On the one hand, the heat exchange component 30 is made of a flexible part 31, and the flexible part 31 is relatively light in weight, which is beneficial to reducing the weight of the battery device 100, reducing the production cost of the heat exchange component 30, and improving the energy density of the battery device 100; on the other hand, by setting the flexible part 31 as a flexible structure, the flexible structure has a certain deformation ability, which can make the heat exchange component 30 better fit and adapt to the box assembly 20 and / or the battery cell assembly 10, thereby absorbing the assembly tolerance of the heat exchange component 30, improving the fit between the heat exchange component 30 and the box assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box assembly 20 and / or the battery cell assembly 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0218] Here, the heat exchange assembly 30 can be disposed in the first accommodating cavity 23 , that is, the heat exchange assembly 30 can be in direct contact with the battery cell assembly 10 , thereby further improving the heat exchange efficiency between the heat exchange assembly 30 and the battery cell assembly 10 .

[0219] Of course, in other embodiments, a heat exchange assembly 30 may be provided on the outside of the first accommodating cavity 23 .

[0220] That is, at least a portion of the heat exchange assembly 30 is disposed outside the first accommodating cavity 23 to separate the heat exchange assembly 30 from the battery cell assembly 10 .

[0221] In related technologies, the heat exchange assembly and the battery cell assembly are arranged in the same space, which is conducive to ensuring heat exchange efficiency. However, when the battery cell assembly is in a very abnormal condition, the heat exchange medium in the cooling system may leak. The leaked heat exchange medium increases the risk of short circuit of the battery cell assembly in the battery device box to a certain extent, affecting the reliability of the battery device.

[0222] In this embodiment, a heat exchange assembly 30 is provided on the outside of the first accommodating cavity 23 to separate the heat exchange assembly 30 from the battery cell assembly 10, thereby reducing the risk of the heat exchange medium of the heat exchange assembly 30 leaking and contacting the battery cell assembly 10, thereby reducing the risk of short circuit of the battery device 100 and improving the reliability of the battery device 100.

[0223] The box assembly 20 is used to accommodate the battery cell assembly 10. The box assembly 20 can be of various structures. In some embodiments, please refer to Figure 2 The housing assembly 20 includes a housing body 21. The housing body 21 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 together define a first accommodating cavity 23 for accommodating the battery cell assembly 10. The second housing portion 212 may be a hollow structure with one end open. The first housing portion 211 is a plate-like structure. The first housing portion 211 covers the open side of the second housing portion 212 to form the housing body 21 having the first accommodating cavity 23. The first housing portion 211 and the second housing portion 212 may also each be a hollow structure with one end open. The open side of the first housing portion 211 covers the open side of the second housing portion 212 to form the housing body 21 having the first accommodating cavity 23. Of course, the first housing portion 211 and the second housing portion 212 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0224] In order to improve the sealing performance after the first box body 211 and the second box body 212 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 211 and the second box body 212 .

[0225] Assuming that the first box portion 211 covers the top of the second box portion 212 , the first box portion 211 can also be referred to as an upper box cover, and the second box portion 212 can also be referred to as a lower box cover.

[0226] For other embodiments, please refer to Figure 2 The box assembly 20 can also be configured to include a box body 21 and a bottom guard plate 22 according to needs. A second accommodating cavity 24 is formed between the bottom guard plate 22 and the outer wall of the box body 21. A heat exchange assembly 30 is disposed in the second accommodating cavity 24.

[0227] It should be noted that the bottom guard plate 22 can be located at the bottom of the box body 21, the top of the box body 21, or the side of the box body 21. The function of the bottom guard plate 22 is to protect the box body 21 and reduce the impact of external debris on the box body 21 during driving, thereby improving the reliability of the battery cell assembly 10.

[0228] For example, see Figures 2 to 4 The box assembly 20 includes a box body 21 and a bottom guard plate 22. The box body 21 includes a first box body portion 211 and a second box body portion 212. A first accommodating cavity 23 is formed between the first box body portion 211 and the second box body portion 212. A second accommodating cavity 24 is formed between the bottom wall of the second box body portion 212 and the bottom guard plate 22. The heat exchange assembly 30 is arranged in the second accommodating cavity 24.

[0229] Here, the heat exchange component 30 may be disposed only in the second accommodating chamber 24 , or the heat exchange component 30 may be disposed not only in the second accommodating chamber 24 but also in other areas outside the second accommodating chamber 24 .

[0230] A second accommodating cavity 24 is formed between the bottom wall of the second box body 212 and the bottom guard plate 22 , that is, the first accommodating cavity 23 and the second accommodating cavity 24 are separated.

[0231] Here, by providing the bottom guard plate 22 , while protecting the box assembly 20 and the battery cell 11 , it can also support and protect the heat exchange assembly 30 .

[0232] The heat exchange assembly 30 is arranged in the second accommodating cavity 24, that is, the heat exchange assembly 30 is arranged outside the first accommodating cavity 23, so as to separate the heat exchange assembly 30 from the battery cell assembly 10, thereby avoiding the heat exchange medium of the heat exchange assembly 30 from leaking and contacting the battery cell assembly 10, thereby causing the battery device 100 to short-circuit, thereby improving the reliability of the battery device 100.

[0233] In this embodiment, a bottom guard plate 22 is provided on the outside of the box body 21 to define a second accommodating chamber 24 between the bottom guard plate 22 and the second box portion 212. The heat exchange assembly 30 is disposed within the second accommodating chamber 24 for heat exchange with the box body 21, thereby achieving heat exchange with the battery cell assembly 10 carried within the box body 21. In other words, by disposing the heat exchange assembly 30 outside the first accommodating chamber 23 of the box assembly 20, the problem of short circuiting the battery device 100 due to leakage of the heat exchange medium from the heat exchange assembly 30 can be avoided to a certain extent, thereby improving the reliability of the battery device 100 and maximizing the utilization of the accommodating chamber within the box assembly 20, thereby increasing the compactness of the battery device 100. Furthermore, by providing the bottom guard plate 22, the bottom guard plate 22 cooperates with the box body 21 to connect and protect the battery cell assembly 10, further improving the reliability of the box assembly 20.

[0234] In some embodiments, see Figures 2 to 7 Part of the bottom guard plate 22 protrudes to form a circle of connecting portion 221, and the connecting portion 221 is sealed and connected to the second box body portion 212.

[0235] Exemplarily, the bottom guard plate 22 may be a circle of protrusions at the outermost edge to form a circle of connecting portions 221 .

[0236] The specific method of connecting the connecting portion 221 and the second box body portion 212 is not limited herein. For example, the connecting portion 221 and the second box body portion 212 are fastened together by bolts, screws, or rivets.

[0237] In this embodiment, the protruding connecting portion 221 forms a circle, which not only connects to the second housing portion 212 but also defines a second accommodating chamber 24 between the bottom guard plate 22 and the second housing portion 212. Furthermore, the sealing connection between the connecting portion 221 and the second housing portion 212 can, to a certain extent, prevent mud, sand, or water from entering the second accommodating chamber 24, thereby protecting the heat exchange assembly 30 in the second accommodating chamber 24.

[0238] In some embodiments, the box assembly 20 further includes a seal, which is disposed between the connecting portion 221 and the second box portion 212 to achieve a sealed connection between the connecting portion 221 and the second box portion 212 .

[0239] Exemplarily, the sealing member is, for example, a sealing strip.

[0240] In this embodiment, a seal is provided and the seal is clamped between the connecting portion 221 and the second box body portion 212. That is, the seal is used to seal the gap between the connecting portion 221 and the second box body portion 212, which further helps to prevent mud or water from entering the second accommodating cavity 24, thereby improving the sealing performance between the bottom guard plate 22 and the second box body portion 212; at the same time, it can also reduce the occurrence of liquid leakage from the heat exchange component 30.

[0241] In some embodiments, the seal has a width of 2 mm to 20 mm.

[0242] For example, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, and so on.

[0243] In this embodiment, by setting the width of the sealing member to 2 mm-20 mm, it is beneficial to effectively improve the sealing performance between the bottom guard plate 22 and the second box body portion 212 while reducing costs.

[0244] In some embodiments, please refer again to Figure 4 and Figure 7 Part of the bottom guard plate 22 is protruding to form a limiting structure 222. The limiting structure 222 is used to support the heat exchange assembly 30.

[0245] It should be noted that part of the area of the bottom guard plate 22 is protruding to form a limiting structure 222, which may mean that the side of the bottom guard plate 22 facing away from the box body 21 is concave, so that the side of the bottom guard plate 22 facing the box body 21 is protruding to form the limiting structure 222; it may also be that the side of the bottom guard plate 22 facing away from the box body 21 is not concave, and the side of the bottom guard plate 22 facing the box body 21 is thickened and protruded to form the limiting structure 222.

[0246] The limiting structure 222 is used to support the heat exchange assembly 30 , which can improve the assembly stability of the heat exchange assembly 30 , thereby facilitating improved reliability of the battery device 100 .

[0247] In this embodiment, please refer to Figure 4 and Figure 7 The bottom guard plate 22 is used to support the heat exchange component 30 by setting a limiting structure 222, which is beneficial to improving the stability of the heat conduction interface contact of the heat exchange component 30, thereby improving the thermal management performance of the heat exchange component 30.

[0248] For example, in an embodiment where the limiting structure 222 is used to support the flexible member 31 , the limiting structure 222 may be supported on the surface of the flexible member 31 and cause the flexible member 31 to abut against the second box portion 212 .

[0249] In this embodiment, the limiting structure 222 is provided to abut the flexible member 31 against the second box body portion 212 , which not only supports the second box body portion 212 but also fixes the heat exchange assembly 30 , thereby improving the stability of the heat exchange assembly 30 .

[0250] In some embodiments, please refer again to Figure 6 Part of the bottom guard plate 22 is protruding to form a limiting structure 222 . The heat exchange assembly 30 is provided with an avoidance hole 33 . The limiting structure 222 passes through the avoidance hole 33 to support the second box body 212 .

[0251] Here, the heat exchange component 30 is provided with an avoidance hole 33 , that is, the flexible member 31 is provided with an avoidance hole 33 , and the avoidance hole 33 passes through two opposite sides of the heat exchange component 30 in the thickness direction.

[0252] It should be noted that the avoidance hole 33 needs to avoid the medium flow channel 32 .

[0253] Here, the specific position and number of the avoidance holes 33 are not limited and are determined according to specific circumstances.

[0254] In this embodiment, the heat exchange component 30 avoids the limiting structure 222 by setting an avoidance hole 33. The limiting structure 222 passes through the avoidance hole 33 to abut against the second box body 212. While supporting the second box body 212, it can also position the heat exchange component 30, thereby improving the stability of the heat exchange component 30.

[0255] In this embodiment, the bottom guard plate 22 is provided with a limiting structure 222, and the heat exchange component 30 is provided with an avoidance hole 33. The limiting structure 222 passes through the avoidance hole 33 to support the second box body 212. This is beneficial to improving the problem of deformation of the second box body 212 due to insufficient support strength when it is under pressure, thereby improving the problem of the second box body 212 directly adhering to the heat exchange component 30, which causes the heat exchange component 30 to be crushed. It is beneficial to improve the stability of the thermal interface contact of the heat exchange component 30, thereby improving the thermal management performance of the heat exchange component 30.

[0256] In some embodiments, see Figure 23 Part of the second box portion 212 is protruding to form a limiting structure 222. The limiting structure 222 is used to support the heat exchange assembly 30.

[0257] It should be noted that a partial area of the second box body 212 protrudes to form a limiting structure 222, which may mean that the side of the second box body 212 facing away from the bottom guard plate 22 is recessed, so that the side of the second box body 212 facing the bottom guard plate 22 protrudes to form the limiting structure 222; it may also be that the side of the second box body 212 facing away from the bottom guard plate 22 is not recessed, and the side of the second box body 212 facing the bottom guard plate 22 is thickened and protrudes to form the limiting structure 222.

[0258] In this embodiment, the second box portion 212 is used to support the heat exchange component 30 by providing a limiting structure 222, which is beneficial to improving the stability of the heat conduction interface contact of the heat exchange component 30 and further improving the thermal management performance of the heat exchange component 30.

[0259] For example, in an embodiment where the limiting structure 222 is used to support the flexible member 31 , the limiting structure 222 may be supported on the surface of the flexible member 31 and abut the flexible member 31 against the bottom guard plate 22 .

[0260] In this embodiment, the limiting structure 222 is provided to make the flexible member 31 abut against the bottom guard plate 22 , which not only supports the bottom guard plate 22 but also fixes the heat exchange assembly 30 , thereby improving the stability of the heat exchange assembly 30 .

[0261] In some embodiments, a portion of the second box portion 212 is protruding to form a limiting structure 222 . The heat exchange assembly 30 is provided with an avoidance hole 33 . The limiting structure 222 passes through the avoidance hole 33 to support the bottom guard plate 22 .

[0262] Here, the heat exchange assembly 30 is provided with an avoidance hole 33 , that is, the flexible member 31 is provided with an avoidance hole 33 .

[0263] It should be noted that the avoidance hole 33 needs to avoid the medium flow channel 32 .

[0264] Here, the specific position and number of the avoidance holes 33 are not limited and are determined according to specific circumstances.

[0265] In this embodiment, the heat exchange assembly 30 is provided with an avoidance hole 33 to avoid the limiting structure 222. The limiting structure 222 passes through the avoidance hole 33 to abut against the bottom guard plate 22. This not only supports the bottom guard plate 22 but also positions the heat exchange assembly 30, thereby improving the stability of the heat exchange assembly 30. In addition, the bottom guard plate 22 and the second box portion 212 can define a second accommodating chamber 24.

[0266] In this embodiment, the second box body 212 is provided with a limiting structure 222, and the heat exchange component 30 is provided with an avoidance hole 33. The limiting structure 222 passes through the avoidance hole 33 to support the bottom guard plate 22. This is beneficial to improving the problem of deformation of the second box body 212 due to insufficient support strength when it is under pressure, thereby improving the problem of the second box body 212 directly adhering to the heat exchange component 30, which causes the heat exchange component 30 to be crushed, and is beneficial to improving the stability of the thermal interface contact of the heat exchange component 30, thereby improving the thermal management performance of the heat exchange component 30.

[0267] In some embodiments, the distance between the avoidance hole 33 and the limiting structure 222 is 0.5 mm-1 mm.

[0268] For example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc.

[0269] By setting the distance between the avoidance hole 33 and the limiting structure 222 to 0.5mm-1mm, it can not only play a positioning role for the heat exchange component 30, but also help improve the assembly efficiency between the heat exchange component 30, the bottom guard plate 22 and the box body 21.

[0270] In some embodiments, the box assembly 20 further includes an adhesive layer, and the heat exchange assembly 30 is bonded to the second box portion 212 via the adhesive layer.

[0271] Here, the adhesive layer is formed by, for example, double-sided tape or self-adhesive tape bonded between the heat exchange assembly 30 and the second box portion 212 .

[0272] In this embodiment, the heat exchange component 30 is bonded to the second box body 212 through the adhesive layer, which is beneficial to improving the fit between the heat exchange surface of the heat exchange component 30 and the second box body 212, thereby improving the heat exchange efficiency and heat exchange effect.

[0273] In some embodiments, the height of the limiting structure 222 is greater than or equal to the thickness of the heat exchange assembly 30 .

[0274] That is, the dimension of the limiting structure 222 in the height direction of the battery device 100 is greater than or equal to the dimension of the heat exchange assembly 30 in the height direction of the battery device 100 .

[0275] In this embodiment, by setting the height of the limiting structure 222 to be greater than or equal to the thickness of the heat exchange component 30, the bottom guard plate 22 and the second box body 212 can be supported by the limiting structure 222, and the flexible heat exchange component 30 fills the gap between the bottom guard plate 22 and the second box body 212. This is conducive to improving the problem of deformation of the second box body 212 due to insufficient support strength when it is under pressure, thereby improving the problem of the heat exchange component 30 being crushed due to the direct adhesion of the second box body 212. It is conducive to improving the stability of the thermal interface contact of the heat exchange component 30, thereby improving the thermal management performance of the heat exchange component 30.

[0276] In some embodiments, see Figures 5 to 7 The limiting structure 222 is arranged in the central area of the second accommodating cavity 24.

[0277] Here, the central area can be a position close to the center of the bottom guard plate 22, which is spaced apart from the edge of the bottom guard plate 22; it can also be a position close to the center of the second box body 212, which is spaced apart from the edge of the second box body 212.

[0278] In this embodiment, by arranging the limiting structure 222 in the central area of the second accommodating cavity 24, it is beneficial to improve the structural strength of the bottom guard plate 22 and / or the second box body 212 while improving the supporting strength.

[0279] In some embodiments, see Figure 5 and Figure 6 The avoidance holes 33 are provided in plurality, and the plurality of avoidance holes 33 are symmetrically arranged relative to the center line of the heat exchange component 30 .

[0280] Here, the center line of the heat exchange assembly 30 refers to a straight line passing through the midpoint of the heat exchange assembly 30 and extending along the length direction or the width direction of the heat exchange assembly 30 .

[0281] In this embodiment, the plurality of avoidance holes 33 are symmetrically arranged relative to the center line of the heat exchange assembly 30 , that is, the corresponding limiting structures 222 are also symmetrically arranged relative to the center line of the heat exchange assembly 30 , thereby further improving the structural strength of the heat exchange assembly 30 .

[0282] In some embodiments, the length extension direction of the avoidance hole 33 is consistent with the arrangement direction of the plurality of battery cells 11 in the battery cell assembly 10 .

[0283] Here, a plurality of battery cells 11 may be arranged in one direction to form a battery cell assembly 10 .

[0284] In this embodiment, the arrangement direction of the multiple battery cells 11 in the battery cell assembly 10 is perpendicular to the large surface of the battery cells 11. That is, the battery cells 11 are in contact or close to each other through their large surfaces. The arrangement direction of the multiple battery cells 11 in the battery cell assembly 10 is also the extension direction of the medium flow channel 32.

[0285] The battery cell 11 has multiple surfaces. The surface with the largest area among these surfaces is called the large surface. Taking a square battery cell 11 as an example, in a vertical position, the surface formed by the length and width of the battery cell 11 is the bottom surface of the battery cell 11, the surface formed by the length and height of the battery cell 11 is the large surface of the battery cell 11, and the surface formed by the width and height of the battery cell 11 is the side surface of the battery cell 11.

[0286] In this embodiment, by setting the length extension direction of the avoidance hole 33 to be consistent with the arrangement direction of the multiple battery cells 11 in the battery cell assembly 10, it is beneficial to improve the structural strength and the heat exchange efficiency.

[0287] In some embodiments, the gap between the avoidance hole 33 and the limiting structure 222 in the length direction is greater than or equal to 0 and less than or equal to 5 mm.

[0288] The gap between the avoidance hole 33 and the limiting structure 222 in the length direction can be any one of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 1.7mm, 1.8mm, 1.9mm, 1mm, 2mm, 3mm, 3.5mm, 3.6mm, 3.8mm, 4mm, 4.5mm, 4.7mm, 4.8mm, 5mm or any point value between any two of them.

[0289] The gap between the avoidance hole 33 and the limiting structure 222 in the length direction is appropriate, which can meet the installation redundancy and is conducive to the assembly and positioning of the heat exchange component 30.

[0290] In some embodiments, the gap between the avoidance hole 33 and the limiting structure 222 in the length direction is greater than or equal to 2 mm and less than or equal to 3 mm.

[0291] Exemplarily, the gap between the avoidance hole 33 and the limiting structure 222 in the length direction can be any one of 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, or any value between any two of them.

[0292] This is further conducive to achieving assembly and positioning of the heat exchange assembly 30 while meeting installation redundancy. In some embodiments, the limiting structure 222 can also be bonded to the second box portion 212 through an adhesive layer.

[0293] Here, the limiting structure 222 is bonded to the second box portion 212 via an adhesive layer, which further improves the reliability of the connection structure between the limiting structure 222 and the second box portion 212 .

[0294] In some embodiments, at least two flexible members 31 are configured as metal plasticized films.

[0295] The flexible member 31 is a single-layer or multi-layer film.

[0296] Here, the metal-plasticized film is a metal-plastic composite material, that is, it includes a metal layer and a plastic layer.

[0297] In this embodiment, the thin and lightweight metal-plasticized films, combined with the medium flow channel 32 formed between at least two metal-plasticized films, are unaffected by the extrusion process and do not require a high thickness. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the insulation properties of the heat exchange assembly 30 reduce the risk of insulation failure. This reduces the risk of reaction between the heat exchange assembly 30 and the heat exchange medium flowing within it, further minimizing the risk of corrosion and leakage of the heat exchange medium.

[0298] Exemplarily, at least two flexible members 31 are configured as aluminum-plastic films.

[0299] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0300] In some embodiments, at least two flexible members 31 include a hot pressing region 34 . The hot pressing region 34 is configured such that at least two flexible members 31 are formed by hot pressing. The hot pressing region 34 separates the heat exchange assembly 30 to form at least one medium flow channel 32 .

[0301] Here, the flexible member 31 is sealed by a hot pressing process, which can effectively ensure that the heat exchange component 30 has good sealing performance and is not prone to cracking.

[0302] In this embodiment, the flexible member 31 is sealed by a hot pressing process, that is, a hot pressing area 34 is formed by hot pressing. The hot pressing area 34 separates the heat exchange component 30 to form at least one medium flow channel 32. This molding method is simple.

[0303] In some embodiments, see Figures 2 to 6 , the width of the hot pressing area 34 is 0.5mm-5mm.

[0304] For example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 3.3mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 4.0mm, 4.2mm, 4.5mm, 4.6mm, 4.8mm, 4.9mm, 5mm, and the like.

[0305] It is understandable that in some cases, different medium flow channels 32 are separated by the hot pressing area 34 . Therefore, a hot pressing area 34 of sufficient width is conducive to ensuring the sealing of the medium flow channels 32 , that is, it is conducive to ensuring the reliability of the medium flow channels 32 .

[0306] In this embodiment, by setting the width of the hot pressing area 34 to 0.5 mm-5 mm, it is beneficial to improve the reliability of the medium flow channel 32 of the flexible part 31 while also improving the coverage rate of the medium flow channel 32, thereby improving the heat exchange efficiency of the heat exchange component 30.

[0307] In some embodiments, see Figures 2 to 6 , the width of the hot pressing area 34 is 2mm-3mm.

[0308] For example, 2.0mm, 2.1mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, etc.

[0309] In this embodiment, by setting the width of the hot pressing area 34 to 2mm-3mm, it is beneficial to improve the reliability of the medium flow channel 32 of the flexible part 31 while further improving the coverage rate of the medium flow channel 32, thereby further improving the heat exchange efficiency of the heat exchange component 30.

[0310] In some embodiments, see Figures 2 to 5 At least two flexible members 31 include a hot pressing region 34 , which is formed by hot pressing. The hot pressing region 34 separates the heat exchange assembly 30 to form at least one medium flow channel 32 . The hot pressing region 34 is provided with an avoidance hole 33 .

[0311] That is, in the embodiment where the avoidance hole 33 is formed, the avoidance hole 33 is provided in the hot pressing area 34 .

[0312] By providing the avoidance hole 33 in the hot pressing area 34 for avoiding the limiting structure 222 , the structural strength of the hot pressing area 34 is higher, which is beneficial to improving the reliability of the connection structure between the flexible member 31 and the support member.

[0313] In some embodiments, see Figure 5 and Figure 6 The box assembly 20 is provided with a limiting structure 222, and the heat exchange assembly 30 has a raised area 311 and a recessed area 312. A medium flow channel 32 is formed in the raised area 311, and the recessed area 312 is an area other than the medium flow channel 32. The limiting structure 222 abuts against the recessed area 312.

[0314] Here, the size of the raised area 311 in the height direction of the battery device 100 is greater than the size of the depressed area 312 in the height direction of the battery device 100 .

[0315] Exemplarily, a medium flow channel 32 is formed in the raised area 311 , and the extending direction of the raised area 311 is the extending direction of the medium flow channel 32 .

[0316] Exemplarily, the raised areas 311 and the recessed areas 312 are spaced apart so that a raised area 311 is defined between adjacent recessed areas 312 .

[0317] Exemplarily, the flexible members 31 in the raised area 311 are spaced apart from each other, so that medium flow channels 32 are formed between the flexible members 31 .

[0318] Exemplarily, the flexible members 31 in the recessed areas 312 fit together, so that a raised area 311 is defined between adjacent recessed areas 312 .

[0319] In this embodiment, the box assembly 20 is provided with a limiting structure 222, and the heat exchange assembly 30 has a raised area 311 and a recessed area 312. A medium flow channel 32 is formed in the raised area 311, and the recessed area 312 is an area other than the medium flow channel 32. The limiting structure 222 abuts against the recessed area 312.

[0320] In this embodiment, the heat exchange component 30 is provided with a raised area 311 and a recessed area 312 to form a medium flow channel 32 in the raised area 311, and the limiting structure 222 of the box assembly 20 abuts against the recessed area 312 to achieve assembly positioning of the heat exchange component 30.

[0321] In some embodiments, see Figures 2 to 6 The recessed area 312 of the flexible member 31 has a penetrating avoidance hole 33 , and the limiting structure 222 is disposed in the avoidance hole 33 .

[0322] Here, the recessed area 312 of the flexible member 31 is provided with an avoidance hole 33 , that is, the flexible member 31 is provided with the avoidance hole 33 , and the setting of the avoidance hole 33 will not affect the medium flow channel 32 .

[0323] It should be noted that the avoidance hole 33 needs to avoid the medium flow channel 32 .

[0324] Here, the specific position and number of the avoidance holes 33 are not limited and are determined according to specific circumstances.

[0325] For example, the avoidance hole 33 can be provided to avoid the limiting structure 222 so that the limiting structure 222 passes through the avoidance hole 33 . The limiting structure 222 can play a role in assembling and positioning the heat exchange component 30 .

[0326] In this embodiment, the heat exchange component 30 is provided with an avoidance hole 33 to avoid the limiting structure 222. The limiting structure 222 passes through the avoidance hole 33 to position the heat exchange component 30, thereby improving the stability of the heat exchange component 30.

[0327] Of course, in other embodiments, a portion of the limiting structure 222 may be supported on the hot pressing area 34 of the flexible part 31, and another portion of the limiting structure 222 may pass through the avoidance hole 33, so as to position the heat exchange component 30 and improve the stability of the heat exchange component 30.

[0328] In some embodiments, a portion of the box assembly 20 forms a limiting structure 222 , and the limiting structure 222 passes through the avoidance hole 33 and abuts against another portion of the box assembly 20 .

[0329] The limiting structure 222 passes through the avoidance hole 33 and abuts against another part of the box assembly 20. That is, the limiting structure 222 can support another part of the box assembly 20 to form a gap inside the box assembly 20, and the heat exchange assembly 30 fills the gap.

[0330] In this embodiment, the heat exchange component 30 avoids the limiting structure 222 by setting an avoidance hole 33. The limiting structure 222 passes through the avoidance hole 33 to abut against another part of the box component 20. While supporting the other part of the box component 20, it can also position the heat exchange component 30, thereby improving the stability of the heat exchange component 30.

[0331] In some embodiments, the box assembly 20 further includes an adhesive layer, and the limiting structure 222 is bonded to another part of the box assembly 20 through the adhesive layer.

[0332] Here, the adhesive layer is formed by, for example, double-sided tape or self-adhesive tape bonded between the heat exchange assembly 30 and another portion of the box assembly 20 .

[0333] In this embodiment, the heat exchange component 30 is bonded to another part of the box component 20 through the adhesive layer, which is beneficial to improving the fit between the heat exchange surface of the heat exchange component 30 and the other part of the box component 20, thereby improving the heat exchange efficiency and heat exchange effect.

[0334] In some embodiments, see Figures 2 to 7The housing assembly 20 includes a housing body 21 and a bottom guard plate 22. The housing body 21 includes a first housing portion 211 and a second housing portion 212. A first accommodating chamber 23 is formed between the first housing portion 211 and the second housing portion 212. A second accommodating chamber 24 is formed between the bottom guard plate 22 and the second housing portion 212, and the heat exchange assembly 30 is disposed in the second accommodating chamber 24. A retaining structure 222 is formed on a side of the bottom guard plate 22 and / or the second housing portion 212 that is adjacent to the second accommodating chamber 24.

[0335] Here, the limiting structure 222 can be formed on the side of the bottom guard plate 22 close to the second accommodating cavity 24, or it can be formed on the side of the second box body 212 close to the second accommodating cavity 24, or the limiting structure 222 can be formed on both the side of the bottom guard plate 22 and the side of the second box body 212 close to the second accommodating cavity 24.

[0336] Here, the heat exchange component 30 may be disposed only in the second accommodating chamber 24 , or the heat exchange component 30 may be disposed not only in the second accommodating chamber 24 but also in other areas outside the second accommodating chamber 24 .

[0337] A second accommodating cavity 24 is formed between the bottom wall of the second box body 212 and the bottom guard plate 22 , that is, the first accommodating cavity 23 and the second accommodating cavity 24 are separated.

[0338] Here, by providing the bottom guard plate 22 , while protecting the box assembly 20 and the battery cell 11 , it can also support and protect the heat exchange assembly 30 .

[0339] The heat exchange assembly 30 is arranged in the second accommodating cavity 24, that is, the heat exchange assembly 30 is arranged outside the first accommodating cavity 23, so as to separate the heat exchange assembly 30 from the battery cell assembly 10, thereby avoiding the heat exchange medium of the heat exchange assembly 30 from leaking and contacting the battery cell assembly 10, thereby causing the battery device 100 to short-circuit, thereby improving the reliability of the battery device 100.

[0340] In this embodiment, a bottom guard plate 22 is provided on the outside of the box body 21 to define a second accommodating chamber 24 between the bottom guard plate 22 and the second box portion 212. The heat exchange assembly 30 is disposed within the second accommodating chamber 24 for heat exchange with the box body 21, thereby achieving heat exchange with the battery cell assembly 10 carried within the box body 21. In other words, by disposing the heat exchange assembly 30 outside the first accommodating chamber 23 of the box assembly 20, the problem of short circuiting the battery device 100 due to leakage of the heat exchange medium from the heat exchange assembly 30 can be avoided to a certain extent, thereby improving the reliability of the battery device 100 and maximizing the utilization of the accommodating chamber within the box assembly 20, thereby increasing the compactness of the battery device 100. Furthermore, by providing the bottom guard plate 22, the bottom guard plate 22 cooperates with the box body 21 to connect and protect the battery cell assembly 10, further improving the reliability of the box assembly 20.

[0341] In some embodiments, the heat exchange assembly 30 is disposed in the first accommodating cavity 23 , and the limiting structure 222 is formed on a side of the first box portion 211 and / or the second box portion 212 close to the first accommodating cavity 23 .

[0342] In other words, by placing the heat exchange assembly 30 in the first accommodating cavity 23 of the housing assembly 20, and placing both the heat exchange assembly 30 and the battery cell assembly 10 in the first accommodating cavity 23, the heat exchange assembly 30 can be in direct contact with the battery cell assembly 10, which is beneficial for improving the heat exchange efficiency of the heat exchange assembly 30. Furthermore, the limiting structure 222 of the housing assembly 20 abuts against the recessed area 312 of the heat exchange assembly 30 to achieve assembly positioning of the heat exchange assembly 30.

[0343] In some embodiments, the flexible member 31 is a layered structure, and the flexible member 31 includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0344] Here, the flexible member 31 includes a metal layer and a non-metal layer, that is, a composite material member composed of the metal layer and the non-metal layer.

[0345] For example, the metal layer and the non-metal layer may be formed by hot pressing or hot melting.

[0346] Here, the number of metal layers and non-metal layers is not limited.

[0347] In this embodiment, the flexible member 31, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a medium flow channel 32 between at least two flexible members 31, it is unaffected by the extrusion process and eliminates the need for a high thickness requirement. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the heat exchange assembly 30 does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0348] In some embodiments, the metal layer includes one of aluminum foil, copper foil, and steel foil.

[0349] By setting the metal layer to be one of aluminum foil, copper foil and steel foil, the flexible member 31 can have a certain structural strength and can play an isolation role.

[0350] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0351] By setting the non-metallic layer to be one of polypropylene, polyvinyl chloride and polyethylene, the flexible member 31 can have a certain waterproof effect.

[0352] For example, a non-metallic layer made of a corrosion-resistant material having acid and alkali corrosion resistance may be selected, or in other words, additives may be added to the non-metallic layer to make the non-metallic layer have acid and alkali corrosion resistance.

[0353] In some embodiments, the non-metallic layer is a hot melt layer.

[0354] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0355] In some embodiments, the flexible member 31 is a layered structure, and the flexible member 31 includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the medium flow channel 32 than the corrosion-resistant layer.

[0356] Here, the corrosion-resistant layer may be a nylon layer formed of nylon material, thereby having certain corrosion resistance, such as acid and alkali corrosion resistance.

[0357] The isolation layer may be a metal layer, and the metal layer may be configured as one of aluminum foil, copper foil and steel foil, which can provide the flexible member 31 with a certain structural strength and play an isolation role.

[0358] The waterproof layer may be a non-metallic layer, and the non-metallic layer may be configured to be one of polypropylene, polyvinyl chloride and polyethylene, so that the flexible member 31 may have a certain waterproof effect.

[0359] In this embodiment, by configuring the flexible member 31 to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the medium flow channel 32 than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange assembly 30.

[0360] In some embodiments, the isolation layer has a thickness of 6.5 μm to 100 μm.

[0361] The thickness of the isolation layer can be any one of 6.5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 38μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm or any value between two of them.

[0362] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member 31 can have a certain structural strength and flexibility.

[0363] In some embodiments, the isolation layer has a thickness of 6.5 μm to 15 μm.

[0364] The thickness of the isolation layer can be any one of 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, 15μm or any value between any two of them.

[0365] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member 31 can be further endowed with certain structural strength and flexibility.

[0366] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm to 20 μm.

[0367] 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. Any one of the point values of 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, 20μm or any point value between any two of them.

[0368] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible member 31 can be improved.

[0369] In some embodiments, the waterproof layer has a thickness of 50 μm to 120 μm.

[0370] The thickness of the waterproof layer can be any one of 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, 120μm or any value between two of them.

[0371] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible member 31 through the waterproof layer.

[0372] In some embodiments, see Figures 2 to 5 The thickness of the flexible member 31 is 0.05 mm to 0.3 mm.

[0373] For example, 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, 0.3mm, etc.

[0374] In this embodiment, by setting the thickness of the flexible part 31 to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength while the overall thickness of the heat exchange component 30 is smaller, which is beneficial to reducing the overall volume and weight of the battery device 100 and increasing the energy density of the battery device 100.

[0375] In some embodiments, see Figures 2 to 5 The thickness of the flexible member 31 is 0.08 mm to 0.2 mm.

[0376] For example, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, etc.

[0377] In this embodiment, by setting the thickness of the flexible part 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength, and the overall thickness of the heat exchange component 30 is further made smaller, which is beneficial to further reduce the overall volume and weight of the battery device 100, so as to further increase the energy density of the battery device 100.

[0378] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0379] Exemplarily, the elastic modulus of the flexible part 31 can be any one of 0.1 MPa, 1 MPa, 50 MPa, 100 MPa, 150 MPa, 200 MPa, 300 MPa, 500 MPa, 800 MPa, 1000 MPa, 1300 MPa, 1500 MPa, 1800 MPa, 2000 MPa, 2500 MPa, 2800 MPa, 3000 MPa, 3500 MPa, 4000 MPa, 4500 MPa, 5000 MPa, 5500 MPa, 6000 MPa, 6500 MPa, 7000 MPa, 7500 MPa, 8000 MPa, 8500 MPa, 8800 MPa, 9000 MPa, 9500 MPa, 9700 MPa, and 10000 MPa, or any point value between any two of them.

[0380] The elastic modulus describes the unit strain caused by unit stress when a solid is subjected to a certain force range. It is one of the fundamental physical quantities of a material. The larger the elastic modulus, the greater the material's stiffness and compressive resistance. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0381] In this embodiment, by setting the elastic modulus of the flexible part 31 to 0.1MPa-10000MPa, the flexible part 31 has a certain structural strength, thereby improving the reliability of the heat exchange component 30, and has a certain deformation ability, which can improve the fit between the heat exchange component 30 and the box component 20 and / or the battery component battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery component battery cell component 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0382] The second aspect of the embodiment of the present disclosure provides a heat exchange component 30, which includes at least two flexible parts 31, which are stacked and at least one medium flow channel 32 is formed between the flexible parts 31. The at least one medium flow channel 32 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the heat exchange unit 372 component.

[0383] That the heat exchange assembly 30 includes at least two flexible members 31 means that the number of the flexible members 31 included in the heat exchange assembly 30 may be two or more than two.

[0384] Here, the flexibility of the flexible member 31 refers to the material properties of the structure. This type of property can be a property imparted to the material due to its light weight, or a property imparted to the material due to at least one of its properties, such as thickness, stiffness, strength, and elastic modulus. As an example, the material of the flexible member 31 can be selected to be a material that is lighter than conventional structures such as aluminum plates or steel plates, and its flexibility can be controlled by the thickness, width, length, and material type of the flexible member 31. By configuring the heat exchange assembly 30 as the flexible member 31 in the embodiment of the present disclosure, the weight of the heat exchange assembly 30 can be reduced.

[0385] At least one medium flow channel 32 is formed between at least two flexible members 31 , which means that the heat exchange assembly 30 forms the medium flow channel 32 between the flexible members 31 . The heat exchange medium flows through the medium flow channel 32 to achieve heat exchange with the battery cell assembly 10 .

[0386] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can cool the battery cells 11. For example, it can be gaseous or liquid. In the embodiment of the present disclosure, water is used as the heat exchange medium for example.

[0387] Exemplarily, the heat exchange assembly 30 further includes an inlet 35 and an outlet 36 , both of which are in communication with the medium flow channel 32 .

[0388] Here, the inlet 35 and the outlet 36 of the heat exchange assembly 30 are used to connect to the pipelines of the air conditioning system or the water tank or other liquid storage device of the vehicle or electrical equipment.

[0389] It should be noted that the specific number of the medium flow channels 32 is not limited here and can be one or more.

[0390] The principle of heat exchange of the heat exchange component 30 for the battery cell assembly 10 is as follows: the heat exchange medium output by the heat exchange source (not shown) enters the medium circulation through the inlet 35 of the heat exchange component 30, exchanges heat with the battery cell assembly 10, and then flows out through the outlet 36 of the heat exchange component 30, completing the heat exchange of the battery cell assembly 10.

[0391] The flexible part 31 is set as a flexible structure with certain expandable or contractible properties, so that the heat exchange component 30 can be formed into a contoured structure, thereby improving the fit between the heat exchange component 30 and the box component 20 and / or the battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery cell component 10.

[0392] It should be noted that the flexible part 31 can have conductive properties, which is conducive to maintaining an equipotential setting with the box assembly 20; the flexible part 31 can also have electrical insulation properties, without the need for insulation treatment, which is conducive to reducing the leakage risk and production cost of the battery device 100, thereby improving the reliability of the battery device 100.

[0393] The heat exchange assembly 30 provided in the embodiment of the present disclosure, on the one hand, is made of a flexible part 31, and the flexible part 31 is relatively light in weight, which is beneficial to reducing the weight of the heat exchange assembly 30 and reducing the production cost of the heat exchange assembly 30; on the other hand, by setting the flexible part 31 as a flexible structure, the heat exchange assembly 30 can be better fitted with the box assembly 20 and / or the battery cell assembly 10, which is beneficial to absorbing the assembly tolerance of the heat exchange assembly 30, without the need to use filler or thermal conductive material, thereby improving the fit between the heat exchange assembly 30 and the box assembly 20 and / or the battery cell assembly 10, thereby increasing the effective heat exchange area between the heat exchange assembly 30 and the box assembly 20 and / or the battery cell assembly 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange assembly 30.

[0394] In some embodiments, see Figures 2 to 6 The heat exchange component 30 is provided with an avoidance hole 33 , and the avoidance hole 33 runs through two opposite sides of the heat exchange component 30 .

[0395] Here, the heat exchange assembly 30 is provided with an avoidance hole 33 , that is, the flexible member 31 is provided with an avoidance hole 33 .

[0396] It should be noted that the avoidance hole 33 needs to avoid the medium flow channel 32 .

[0397] Here, the specific position and number of the avoidance holes 33 are not limited and are determined according to specific circumstances.

[0398] In this embodiment, the heat exchange assembly 30 is provided with an avoidance hole 33 to avoid the limiting structure 222 , which is beneficial to positioning the heat exchange assembly 30 and improves the stability of the heat exchange assembly 30 .

[0399] In some embodiments, see Figures 2 to 7 The avoidance holes 33 are provided in plurality, and the plurality of avoidance holes 33 are symmetrically arranged relative to the center line of the heat exchange component 30 .

[0400] Here, the center line of the heat exchange assembly 30 refers to a straight line passing through the midpoint of the heat exchange assembly 30 and extending along the length direction or the width direction of the heat exchange assembly 30 .

[0401] In this embodiment, the plurality of avoidance holes 33 are symmetrically arranged relative to the center line of the heat exchange assembly 30 , that is, the corresponding limiting structures 222 are also symmetrically arranged relative to the center line of the heat exchange assembly 30 , thereby further improving the structural strength of the heat exchange assembly 30 .

[0402] In some embodiments, see Figures 2 to 6 At least two flexible parts 31 include a hot pressing area 34 , and the hot pressing area 34 is constructed by hot pressing at least two flexible parts 31 , and the hot pressing area 34 separates the heat exchange component 30 to form at least one medium flow channel 32 .

[0403] Here, the flexible member 31 is sealed by a hot pressing process, which can effectively ensure that the heat exchange component 30 has good sealing performance and is not prone to cracking.

[0404] In this embodiment, the flexible member 31 is sealed by a hot pressing process, that is, a hot pressing area 34 is formed by hot pressing. The hot pressing area 34 separates the heat exchange component 30 to form at least one medium flow channel 32. This molding method is simple.

[0405] In some embodiments, the width of the heat-pressed area 34 is 0.5 mm to 5 mm.

[0406] For example, it is any one of the point values of 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.3mm, 1.5mm, 1.6mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 3.3mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 4.0mm, 4.2mm, 4.5mm, 4.6mm, 4.8mm, 4.9mm, and 5mm, or a point value between any two of them, etc.

[0407] It is understandable that in some cases, different medium flow channels 32 are separated by the hot pressing area 34 . Therefore, a hot pressing area 34 of sufficient width is conducive to ensuring the sealing of the medium flow channels 32 , that is, it is conducive to ensuring the reliability of the medium flow channels 32 .

[0408] In this embodiment, by setting the width of the hot pressing area 34 to 0.5 mm-5 mm, it is beneficial to improve the reliability of the medium flow channel 32 of the flexible part 31 while also improving the coverage rate of the medium flow channel 32, thereby improving the heat exchange efficiency of the heat exchange component 30.

[0409] In some embodiments, the width of the heat-pressed area 34 is 2 mm to 3 mm.

[0410] For example, it may be any one of 2.0mm, 2.1mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm or any point value between any two of them, etc.

[0411] In this embodiment, by setting the width of the hot pressing area 34 to 2mm-3mm, it is beneficial to improve the reliability of the medium flow channel 32 of the flexible part 31 while further improving the coverage rate of the medium flow channel 32, thereby further improving the heat exchange efficiency of the heat exchange component 30.

[0412] In some embodiments, see Figures 5 and 6 The hot pressing area 34 is provided with an avoidance hole 33 .

[0413] That is, in the embodiment where the avoidance hole 33 is formed, the avoidance hole 33 is provided in the hot pressing area 34 .

[0414] By providing the avoidance hole 33 in the hot pressing area 34 for avoiding the limiting structure 222 , the structural strength of the hot pressing area 34 is higher, which is beneficial to improving the reliability of the connection structure between the flexible member 31 and the support member.

[0415] In some embodiments, see Figure 5 and Figure 6 The heat exchange component 30 has a raised area 311 and a recessed area 312 . A medium flow channel 32 is formed in the raised area 311 . The recessed area 312 is a non-medium flow channel area. The flexible member 31 is hot-pressed in the recessed area 312 .

[0416] Here, the size of the raised area 311 in the height direction of the battery device 100 is greater than the size of the depressed area 312 in the height direction of the battery device 100 .

[0417] Exemplarily, a medium flow channel 32 is formed in the raised area 311 , and the extending direction of the raised area 311 is the extending direction of the medium flow channel 32 .

[0418] Exemplarily, the raised areas 311 and the recessed areas 312 are spaced apart so that a raised area 311 is defined between adjacent recessed areas 312 .

[0419] Exemplarily, the flexible members 31 in the raised area 311 are spaced apart from each other, so that medium flow channels 32 are formed between the flexible members 31 .

[0420] Exemplarily, the flexible members 31 in the recessed areas 312 fit together, so that a raised area 311 is defined between adjacent recessed areas 312 .

[0421] In this embodiment, the box assembly 20 is provided with a limiting structure 222, and the heat exchange assembly 30 has a raised area 311 and a recessed area 312. A medium flow channel 32 is formed in the raised area 311, and the recessed area 312 is an area other than the medium flow channel 32. The limiting structure 222 abuts against the recessed area 312.

[0422] In this embodiment, the heat exchange component 30 is provided with a raised area 311 and a recessed area 312 to form a medium flow channel 32 in the raised area 311, and the limiting structure 222 of the box assembly 20 abuts against the recessed area 312 to achieve assembly positioning of the heat exchange component 30.

[0423] In some embodiments, see Figures 4 to 6 The recessed area 312 is provided with a penetrating avoidance hole 33 .

[0424] Here, the recessed area 312 of the flexible member 31 is provided with an avoidance hole 33 , that is, the flexible member 31 is provided with the avoidance hole 33 , and the setting of the avoidance hole 33 will not affect the medium flow channel 32 .

[0425] It should be noted that the avoidance hole 33 needs to avoid the medium flow channel 32 .

[0426] Here, the specific position and number of the avoidance holes 33 are not limited and are determined according to specific circumstances.

[0427] For example, the avoidance hole 33 can be provided to avoid the limiting structure 222 so that the limiting structure 222 passes through the avoidance hole 33 . The limiting structure 222 can play a role in assembling and positioning the heat exchange component 30 .

[0428] In this embodiment, the heat exchange component 30 is provided with an avoidance hole 33 to avoid the limiting structure 222. The limiting structure 222 passes through the avoidance hole 33 to position the heat exchange component 30, thereby improving the stability of the heat exchange component 30.

[0429] In some embodiments, at least two flexible members 31 are configured as metal plasticized films.

[0430] The flexible member 31 is a single-layer or multi-layer film.

[0431] Here, the metal-plasticized film is a metal-plastic composite material, that is, it includes a metal layer and a plastic layer.

[0432] In this embodiment, the thin and lightweight metal-plasticized film, coupled with the formation of a medium flow channel 32 between at least two metal-plasticized films, is unaffected by the extrusion process and eliminates the need for high thickness requirements. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the insulating properties of the metal-plasticized film prevent the risk of insulation failure. The heat exchange assembly 30 also avoids any reaction with the heat exchange medium flowing within, eliminating the risk of corrosion or leakage.

[0433] Exemplarily, at least two flexible members 31 are configured as aluminum-plastic films.

[0434] Aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0435] In some embodiments, the flexible member 31 is a layered structure, and the flexible member 31 includes a metal layer and a non-metal layer, and the metal layer and the non-metal layer are stacked in sequence.

[0436] Here, the flexible member 31 includes a metal layer and a non-metal layer, that is, a composite material member composed of the metal layer and the non-metal layer.

[0437] For example, the metal layer and the non-metal layer may be formed by hot pressing or hot melting.

[0438] Here, the number of metal layers and non-metal layers is not limited.

[0439] In this embodiment, the flexible member 31, composed of a stack of metal and non-metal layers, is thin and lightweight. Furthermore, by forming a medium flow channel 32 between at least two flexible members 31, it is unaffected by the extrusion process and eliminates the need for a high thickness requirement. This reduces the overall thickness and weight of the heat exchange assembly 30. Furthermore, the heat exchange assembly 30 does not react with the heat exchange medium flowing within it, eliminating the risk of corrosion or leakage.

[0440] In some embodiments, the metal layer includes one of aluminum foil, copper foil, and steel foil.

[0441] By setting the metal layer to be one of aluminum foil, copper foil and steel foil, the flexible member 31 can have a certain structural strength and can play an isolation role.

[0442] In some embodiments, the non-metallic layer includes one of polypropylene, polyvinyl chloride, and polyethylene.

[0443] By setting the non-metallic layer to be one of polypropylene, polyvinyl chloride and polyethylene, the flexible member 31 can have a certain waterproof effect.

[0444] For example, a non-metallic layer made of a corrosion-resistant material having acid and alkali corrosion resistance may be selected, or in other words, additives may be added to the non-metallic layer to make the non-metallic layer have acid and alkali corrosion resistance.

[0445] In some embodiments, the non-metallic layer is a hot melt layer.

[0446] Here, by setting the non-metallic layer as a hot-melt layer, that is, composed of a hot-melt material, it is advantageous to combine the non-metallic layer and the metal layer through hot melting, which makes molding simple and the production efficiency high.

[0447] In some embodiments, the flexible member 31 is a layered structure, and the flexible member 31 includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the medium flow channel 32 than the corrosion-resistant layer.

[0448] Here, the corrosion-resistant layer may be a nylon layer formed of nylon material, thereby having certain corrosion resistance, such as acid and alkali corrosion resistance.

[0449] The isolation layer may be a metal layer, and the metal layer may be configured as one of aluminum foil, copper foil and steel foil, which can provide the flexible member 31 with a certain structural strength and play an isolation role.

[0450] The waterproof layer may be a non-metallic layer, and the non-metallic layer may be configured to be one of polypropylene, polyvinyl chloride and polyethylene, so that the flexible member 31 may have a certain waterproof effect.

[0451] In this embodiment, by configuring the flexible member 31 to include a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence, the waterproof layer is closer to the medium flow channel 32 than the corrosion-resistant layer, which is beneficial to improving the reliability of the heat exchange assembly 30.

[0452] In some embodiments, the isolation layer has a thickness of 6.5 μm to 100 μm.

[0453] The thickness of the isolation layer can be any one of 6.5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 38μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm or any value between two of them.

[0454] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-100 μm, the flexible member 31 can have a certain structural strength and flexibility.

[0455] In some embodiments, the isolation layer has a thickness of 6.5 μm to 15 μm.

[0456] The thickness of the isolation layer can be any one of 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, 15μm or any value between any two of them.

[0457] In this embodiment, by setting the thickness of the isolation layer to 6.5 μm-15 μm, the flexible member 31 can be further endowed with certain structural strength and flexibility.

[0458] In some embodiments, the corrosion-resistant layer has a thickness of 5 μm to 20 μm.

[0459] 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. Any one of the point values of 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, 20μm or any point value between any two of them.

[0460] In this embodiment, by setting the thickness of the corrosion-resistant layer to 5 μm-20 μm, the wear resistance and toughness of the flexible member 31 can be improved.

[0461] In some embodiments, the waterproof layer has a thickness of 50 μm to 120 μm.

[0462] The thickness of the waterproof layer can be any one of 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 92μm, 95μm, 100μm, 105μm, 108μm, 110μm, 115μm, 120μm or any value between two of them.

[0463] In this embodiment, by setting the thickness of the waterproof layer to 50 μm-120 μm, the waterproof layer can have a certain structural strength, improve the waterproof performance, and facilitate hot pressing connection of the flexible member 31 through the waterproof layer.

[0464] In some embodiments, the thickness of the flexible member 31 is 0.05 mm to 0.3 mm.

[0465] For example, 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, 0.3mm, etc.

[0466] In this embodiment, by setting the thickness of the flexible part 31 to 0.05mm-0.3mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength while the overall thickness of the heat exchange component 30 is smaller, which is beneficial to reducing the overall volume and weight of the battery device 100 and increasing the energy density of the battery device 100.

[0467] In some embodiments, the thickness of the flexible member 31 is 0.08 mm to 0.2 mm.

[0468] For example, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, etc.

[0469] In this embodiment, by setting the thickness of the flexible part 31 to 0.08mm-0.2mm, the heat exchange component 30 made of the flexible part 31 has a certain structural strength, and the overall thickness of the heat exchange component 30 is further made smaller, which is beneficial to further reduce the overall volume and weight of the battery device 100, so as to further increase the energy density of the battery device 100.

[0470] In some embodiments, the elastic modulus of the flexible member 31 is 0.1 MPa-10000 MPa.

[0471] Exemplarily, the elastic modulus of the flexible part 31 can be any one of 0.1 MPa, 1 MPa, 50 MPa, 100 MPa, 150 MPa, 200 MPa, 300 MPa, 500 MPa, 800 MPa, 1000 MPa, 1300 MPa, 1500 MPa, 1800 MPa, 2000 MPa, 2500 MPa, 2800 MPa, 3000 MPa, 3500 MPa, 4000 MPa, 4500 MPa, 5000 MPa, 5500 MPa, 6000 MPa, 6500 MPa, 7000 MPa, 7500 MPa, 8000 MPa, 8500 MPa, 8800 MPa, 9000 MPa, 9500 MPa, 9700 MPa, and 10000 MPa, or any point value between any two of them.

[0472] The elastic modulus describes the unit strain caused by unit stress when a solid is subjected to a certain force range. It is one of the fundamental physical quantities of a material. The larger the elastic modulus, the greater the material's stiffness and compressive resistance. The elastic modulus is a physical quantity that describes the elasticity of a material.

[0473] In this embodiment, by setting the elastic modulus of the flexible part 31 to 0.1MPa-10000MPa, the flexible part 31 has a certain structural strength, thereby improving the reliability of the heat exchange component 30, and has a certain deformation ability, which can improve the fit between the heat exchange component 30 and the box component 20 and / or the battery component battery cell component 10, thereby increasing the effective heat exchange area between the heat exchange component 30 and the box component 20 and / or the battery component battery cell component 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange component 30.

[0474] In some embodiments, see Figure 4 and Figure 8 The heat exchange assembly 30 includes a heat exchange layer 37 and a temperature-averaging layer 38 . The heat exchange layer 37 includes a flexible member 31 . The temperature-averaging layer 38 is disposed between the heat exchange layer 37 and the battery cell assembly 10 .

[0475] The heat exchange layer 37 includes a flexible part 31, that is, it can improve the fit between the heat exchange layer 37 and the box assembly 20 and / or the battery cell assembly 10, increase the effective heat exchange area between the heat exchange layer 37 and the box assembly 20 and / or the battery cell assembly 10, thereby improving the heat exchange efficiency and heat exchange effect of the heat exchange layer 37.

[0476] The temperature-averaging layer 38 is arranged between the heat exchange layer 37 and the battery cell assembly 10. That is, the temperature-averaging layer 38 is arranged on the side of at least two flexible parts 31 close to the battery cell assembly 10. In this way, the heat exchange medium in the medium flow channel 32 formed between the two flexible parts 31 first exchanges heat with the temperature-averaging layer 38. After the temperature-averaging layer 38 balances the heat, it exchanges heat with the battery device 100. In this way, the temperature difference between different areas of the battery device 100 can be adjusted to a certain extent.

[0477] Here, the temperature-uniform layer 38 may or may not be in direct contact with the battery cell assembly 10 .

[0478] It can be understood that the heat exchange medium in the medium flow channel 32 continuously exchanges heat with the battery cell assembly 10 during the flow process. That is, the heat exchange medium absorbs the heat of the battery cell assembly 10 to dissipate heat from the battery cell assembly 10, causing the temperature of the heat exchange medium to gradually increase. That is, along the flow direction of the heat exchange medium, the temperature of the heat exchange medium located upstream is lower than the temperature of the heat exchange medium located downstream, thereby causing the heat dissipation effect of the heat exchange medium located downstream on the battery cell assembly 10 to deteriorate, and further resulting in poor temperature uniformity of the battery device 100.

[0479] By setting a temperature-equalizing layer 38 between the heat exchange layer 37 and the battery cell assembly 10, the heat exchange medium in the medium flow channel 32 can first exchange heat with the temperature-equalizing layer 38. That is, the temperature-equalizing layer 38 can at least balance the temperatures upstream and downstream of the medium flow channel 32, that is, the temperature of the temperature-equalizing layer 38 can be made more uniform, and by exchanging heat with the battery cell assembly 10, the thermal management performance and temperature uniformity of the battery device 100 are improved.

[0480] In some embodiments, see Figure 8 The temperature-uniform layer 38 includes a plurality of temperature-uniform elements 381 , and the thermal resistance of at least one temperature-uniform element 381 is different from that of the other temperature-uniform elements 381 .

[0481] The fact that the thermal resistance of at least one temperature equalizing element 381 is different from that of the other temperature equalizing elements 381 means that not all temperature equalizing elements 381 have the same thermal resistance. In other words, the thermal resistance of the temperature equalizing elements 381 corresponding to different areas of the battery device 100 can be adjusted accordingly according to the heat dissipation or heating requirements of different areas of the battery device 100.

[0482] It's important to note that thermal resistance and thermal conductivity are two indicators used to measure the thermal performance of building or assembly materials. Thermal resistance represents a material's ability to prevent heat from passing through it. The higher the R-value, the greater the material's heat resistance and insulation performance.

[0483] θ=L / (λS);

[0484] Where: θ is thermal resistance; λ is thermal conductivity; L is material thickness or length; S is heat transfer area.

[0485] An object's ability to block heat flow is proportional to the length of the conduction path, inversely proportional to the cross-sectional area of the path, and inversely proportional to the thermal conductivity of the material. In other words, the thermal resistance of the temperature-balancing layer 38 can be adjusted by varying the material and controlling its thickness.

[0486] In this embodiment, by setting the temperature-equalizing layer 38 to include multiple temperature-equalizing parts 381, and at least one temperature-equalizing part 381 having a thermal resistance different from that of other temperature-equalizing parts 381, temperature-equalizing layers 38 with different thermal resistances can be used in different areas of the battery cell assembly 10 as needed, that is, the heat exchange assembly 30 can be thermally managed in different zones, thereby further improving the thermal management performance and temperature uniformity of the battery device 100.

[0487] In some embodiments, see Figure 8 The battery cell assembly 10 includes a first temperature zone and a second temperature zone. The temperature of the first temperature zone is higher than that of the second temperature zone. The thermal resistance of the temperature equalizer 381 corresponding to the first temperature zone is lower than that of the temperature equalizer 381 corresponding to the second temperature zone.

[0488] It is understandable that during use of the battery device 100, the temperatures corresponding to different areas are different. For example, the temperature near the center of the battery cell assembly 10 is higher and is not easy to dissipate heat to the surrounding areas, and is generally higher than the temperature at the edge of the battery device 100.

[0489] The first temperature zone is, for example, a high temperature zone, and the second temperature zone is, for example, a low temperature zone. The temperature of the first temperature zone is higher than that of the second temperature zone.

[0490] It should be noted that the first temperature zone and the second temperature zone in the embodiment of the present disclosure are absolute numerical ranges, and the present disclosure does not specifically limit the numerical ranges. The size of the numerical ranges can be set according to the specific type of the battery device 100, for example, can be set through simulation analysis.

[0491] In this embodiment, the battery device 100 is divided into different temperature zones, and the thermal resistance of the temperature equalizer 381 corresponding to the different temperature zones is different. Specifically, the thermal resistance of the temperature equalizer 381 corresponding to the high-temperature zone is set to be lower than the thermal resistance of the temperature equalizer 381 corresponding to the low-temperature zone, so as to realize zoned thermal management of the battery device 100. This is more conducive to heat exchange in the high-temperature zone, that is, the temperature equalizer 381 with low thermal resistance is more conducive to heat dissipation in the high-temperature zone of the battery device 100, thereby making the temperature of the battery device 100 more uniform, and further improving the thermal management performance and temperature uniformity of the battery device 100.

[0492] In some embodiments, please refer to Figure 8 The thermal resistance of the temperature-uniform component 381 corresponding to the upstream region of the medium flow channel 32 is higher than the thermal resistance of the temperature-uniform component 381 corresponding to the downstream region of the medium flow channel 32 .

[0493] It can be understood that since the temperature of the heat exchange medium located upstream of the medium flow channel 32 is lower than the temperature of the heat exchange medium located downstream, the heat exchange medium located downstream has a poor heat dissipation effect on the battery cell assembly 10, which in turn leads to poor temperature uniformity of the battery device 100.

[0494] In this embodiment, the thermal resistance of the temperature equalizing member 381 corresponding to the upstream area of the medium flow channel 32 is higher than the thermal resistance of the temperature equalizing member 381 corresponding to the downstream area of the medium flow channel 32, so as to achieve zoned thermal management of the battery device 100. This is more conducive to heat exchange in the downstream area of the medium flow channel 32, that is, the heat exchange efficiency between the low thermal resistance temperature equalizing member 381 corresponding to the downstream area of the medium flow channel 32 and the heat exchange medium is higher, thereby making the temperature of the battery device 100 more uniform, further improving the thermal management performance and temperature uniformity of the battery device 100.

[0495] In some embodiments, see Figure 9The heat exchange component 30 further includes a thermal insulation layer 39 , which is disposed on the peripheral side of the heat exchange layer 37 .

[0496] Here, the thermal insulation layer 39 being provided around the heat exchange layer 37 means that a circle of the thermal insulation layer 39 may be formed around the heat exchange layer 37 , or the thermal insulation layer 39 may be formed on a partial area around the heat exchange layer 37 .

[0497] It should be noted that the thermal insulation layer 39 and the heat exchange layer 37 can be an integrally formed structure, that is, the thermal insulation layer 39 and the heat exchange layer 37 are made of the same material. For example, the thermal insulation layer 39 is a heat-insulating cavity 391 formed on the circumference of the heat exchange layer 37. The thermal insulation layer 39 and the heat exchange layer 37 can also be a split structure, that is, the thermal insulation layer 39 and the heat exchange layer 37 can be made of different materials. For example, the thermal conductivity of the thermal insulation layer 39 can be set to be lower than the thermal conductivity of the heat exchange layer 37.

[0498] In this embodiment, by disposing the thermal insulation layer 39 around the heat exchange layer 37 , it is beneficial to improve the problem of heat loss of the battery device 100 to the surrounding side through the heat exchange layer 37 , thereby improving the thermal insulation effect of the battery device 100 .

[0499] In some embodiments, see Figure 10 and Figure 11 The heat exchange assembly 30 further includes a thermal insulation layer 39 , which is disposed on a side of the heat exchange layer 37 away from the battery cell assembly 10 .

[0500] That is, the heat exchange layer 37 is located between the battery cell assembly 10 and the thermal insulation layer 39 .

[0501] For example, taking the example of the heat exchange layer 37 being arranged at the bottom of the battery cell assembly 10, the thermal insulation layer 39 is located at the bottom of the heat exchange layer 37, which is beneficial to increase the coverage area of the thermal insulation layer 39 covering the heat exchange layer 37, thereby helping to improve the thermal insulation effect of the thermal insulation layer 39.

[0502] Of course, in other embodiments, the thermal insulation layer 39 may also be disposed on the top of the battery cell assembly 10 , or on the side of the battery cell assembly 10 .

[0503] Here, the thermal conductivity of the heat-insulating layer 39 may be set to be lower than the thermal conductivity of the heat-exchanging layer 37 . The heat-insulating layer 39 is used to achieve a heat-insulating function, and the heat-exchanging layer 37 is used to achieve a heat-exchanging function with the battery cell assembly 10 .

[0504] It can be understood that the heat exchange layer 37 here is a flexible structure, and the thermal insulation layer 39 can be a flexible structure or a non-flexible structure.

[0505] In this embodiment, the heat exchange medium circulates in the heat exchange layer 37 and exchanges heat with the battery cell assembly 10, and the insulation layer 39 located on the side of the heat exchange layer 37 away from the battery cell assembly 10 can play a role in insulation. The structure is simple.

[0506] In some embodiments, see Figure 10 and Figure 11 The thermal insulation layer 39 and the heat exchange layer 37 are stacked together, and a flange 392 is formed on the edge of the heat exchange assembly 30 . The flange 392 is arranged around the battery cell assembly 10 or the box assembly 20 .

[0507] That is, the heat exchange assembly 30 is constructed by stacking the thermal insulation layer 39 and the heat exchange layer 37 .

[0508] The flange 392 surrounds the battery cell assembly 10 or the housing assembly 20, forming a boat-shaped structure similar to the flange 392. For example, in an embodiment where the heat exchange assembly 30 is disposed within the first accommodating cavity 23, the flange 392 surrounds the battery cell assembly 10. In this case, the thermal insulation layer 39 wraps the heat exchange layer 37 between the thermal insulation layer 39 and the battery cell assembly 10.

[0509] In the embodiment where the heat exchange assembly 30 is disposed in the second accommodating cavity 24 , the flange 392 is disposed around the peripheral side of the box assembly 20 . At this time, the insulation layer 39 wraps the heat exchange layer 37 between the insulation layer 39 and the box assembly 20 .

[0510] Here, the flange 392 may be a heat-insulating cavity 391 or the heat-insulating cavity 391 may be filled with a heat-insulating medium made of a low thermal conductivity material to improve the side protection performance of the battery device 100 .

[0511] In this embodiment, a flange 392 is formed on the edge of the heat exchange assembly 30, and the flange 392 is arranged around the battery cell assembly 10 or the box assembly 20, which further improves the thermal insulation performance and the side protection performance of the battery device 100.

[0512] In some embodiments, see Figure 10 and Figure 11 A heat-insulating cavity 391 is provided inside the heat-insulating layer 39 .

[0513] In this embodiment, an insulating cavity 391 is provided within the insulation layer 39. This cavity facilitates heat exchange between the heat exchange medium within the medium flow channel 32 and the external environment, thereby insulating the battery cell assembly 10 and alleviating the problem of low peripheral temperature of the battery cell assembly 10. Furthermore, the provision of the insulating cavity 391 also acts as a buffer, providing a certain degree of protection and enhancing the impact resistance of the battery device 100.

[0514] In some embodiments, see Figure 10 and Figure 11 The heat insulating cavity 391 is filled with a heat insulating medium, and the thermal conductivity of the heat insulating medium is lower than the thermal conductivity of the insulation layer 39 .

[0515] Here, the specific type of the heat insulating medium is not limited, as long as the thermal conductivity is lower than the thermal conductivity of the insulation layer 39 .

[0516] In this embodiment, by filling the insulating cavity 391 with an insulating medium, it is beneficial to improve the heat exchange between the heat exchange medium in the medium flow channel 32 and the external environment, that is, it has an insulation effect on the battery cell assembly 10 and improves the problem of low peripheral temperature of the battery cell assembly 10.

[0517] In some embodiments, see Figures 12 to 15 The heat exchange layer 37 includes at least two medium flow channels 32 . The battery device 100 further includes a switch assembly 40 , which is disposed on the heat exchange assembly 30 and is used to control the size of the flow cross-sectional area of at least one medium flow channel 32 .

[0518] The switch component 40 is used to control the size of the flow cross-sectional area of at least one medium flow channel 32, which means that the switch component 40 can be used to control the size of the flow cross-sectional area of one medium flow channel 32, or can be used to control the size of the flow cross-sectional area of multiple medium flow channels 32, for example, to control the size of the flow cross-sectional area of all medium flow channels 32.

[0519] It should be noted that the flow cross section refers to the cross section that is orthogonal to all streamlines of the elemental or total flow, that is, the plane perpendicular to the flow velocity cluster, such as air or liquid flow. When the streamline clusters are non-parallel, the flow cross section is a curved surface; when the streamline clusters are parallel straight lines, the flow cross section is a flat surface.

[0520] The switch assembly 40 is used to control the size of the flow cross-sectional area of at least one medium flow channel 32 , that is, the flow rate difference of the heat exchange medium in each medium flow channel 32 can be adjusted accordingly according to the temperature difference of different areas of the battery device 100 .

[0521] Here, the initial flow cross-sectional areas of the medium flow channels 32 may be the same or different.

[0522] It should be noted that the specific location of the switch assembly 40 is not limited herein. For example, the switch assembly 40 is disposed near the inlet 35 or near the outlet 36. This facilitates full utilization of the space at the inlet 35 or outlet 36, thereby improving the structural compactness of the battery device 100 and further increasing the energy density of the battery device 100.

[0523] In this embodiment, a switch assembly 40 is provided to control the size of the flow cross-sectional area of at least one of the medium flow channels 32. This allows the size of the flow cross-sectional area of the medium flow channel 32 in the corresponding area to be dynamically adjusted according to the temperature changes in different areas of the battery device 100, thereby achieving the effect of dynamically distributing the flow of the heat exchange medium, which is beneficial to improving the heat dissipation performance of the high-temperature area of the battery device 100 and improving the thermal management performance and temperature uniformity of the battery device 100.

[0524] In some embodiments, see Figures 12 to 13 The switch assembly 40 includes at least two control members 42 , each control member 42 corresponds to a different medium flow channel 32 , and at least two control members 42 can compress the medium flow channel 32 by moving.

[0525] The switch assembly 40 is provided with a plurality of control components 42, each control component 42 being used to correspond to a different medium flow channel 32, that is, the medium flow channel 32 can be compressed by controlling each control component 42, and the flow cross-sectional area of each medium flow channel 32 can be controlled by controlling each control component 42 to approach or move away from each medium flow channel 32.

[0526] It should be noted that the control of the flow cross-sectional area size of each medium flow channel 32 by each control component 42 can be fixed difference control, that is, the difference in the flow cross-sectional area size of each medium flow channel 32 is fixed, that is, the size of the flow cross-sectional area of each medium flow channel 32 needs to be changed at the same time, or it can be dynamic difference control, that is, the difference in the flow cross-sectional area size of each medium flow channel 32 may not be fixed, that is, the size of the flow cross-sectional area of each medium flow channel 32 does not need to be changed at the same time.

[0527] In this embodiment, since the flexible member 31 is a flexible structure, the flow cross-sectional area of each medium flow channel 32 can be controlled by controlling the control member 42 to approach or move away from each medium flow channel 32 .

[0528] In some embodiments, see Figure 13 The switch assembly 40 also includes a connecting plate 41, one end of each control member 42 is connected to the connecting plate 41, the free end of each control member 42 is used to compress the medium flow channel 32, and the distance between the free end of at least one control member 42 and the connecting plate 41 is different from the distance between the free end of the other control members 42 and the connecting plate 41.

[0529] One end of each control member 42 is connected to the connecting plate 41 , that is, the connecting plate 41 is used to assemble each control member 42 , thereby enabling each control member 42 to move simultaneously and with the same displacement by controlling the movement of the connecting plate 41 .

[0530] Here, the connecting plate 41 may also be a connecting block.

[0531] Here, the control member 42 is, for example, a control panel or a control block.

[0532] One end of each control member 42 away from the connecting plate 41 is a free end of each control member 42 , and the free end of each control member 42 is used for compressing the medium flow channel 32 .

[0533] The distance between the free end of at least one control member 42 and the connecting plate 41 is different from the distance between the free ends of the other control members 42 and the connecting plate 41. In other words, the heights of the control members 42 are not all the same. The heights of the control members 42 can be set to be different as needed. In this way, the distances between the control members 42 and the corresponding medium flow channels 32 are also different, thereby achieving fixed differential control of the medium flow channels 32 by each control member 42.

[0534] In this embodiment, by setting the heights of each control component 42 to be different, that is, by controlling the connecting plate 41 to be close to or away from the heat exchange component 30, it is possible to achieve fixed differential control of each medium flow channel 32 by each control component 42. The movement mode and control mode of the control switch are simple and reliable.

[0535] In some embodiments, see Figure 14 and Figure 15 The switch assembly 40 includes a thermostat 43, which is arranged between the battery cell assembly 10 and the heat exchange assembly 30. The arrangement direction of the battery cell assembly 10, the thermostat 43 and the heat exchange assembly 30 is limited to a first direction; when the temperature of the battery cell assembly 10 rises, the thermostat 43 absorbs heat and expands in a direction perpendicular to the first direction and contracts in the first direction, and the compression amount of the medium flow channel 32 by the thermostat 43 is reduced.

[0536] Here, the first direction is not limited here, and the embodiment of the present disclosure takes the first direction as the height direction as an example.

[0537] The thermostat 43 is disposed between the battery cell assembly 10 and the heat exchange assembly 30 . Exemplarily, the thermostat 43 is located at the bottom of the battery cell assembly 10 and above the heat exchange assembly 30 .

[0538] It should be noted that the specific structure of the thermostat 43 is not limited herein. For example, the interior of the thermostat 43 is a temperature-control material that rapidly expands when heated and contracts when cooled. The outer shell of the thermostat 43 is made of an elastic material, which facilitates the expansion or contraction of the thermostat 43.

[0539] Here, one temperature controller 43 may correspond to one medium flow channel 32 , or one temperature controller 43 may correspond to multiple medium flow channels 32 .

[0540] In this embodiment, by providing a thermostat 43, when the temperature of the battery cell assembly 10 rises, the thermostat 43 absorbs heat and expands in a direction perpendicular to the first direction and contracts in the first direction. In this way, the size of the thermostat 43 in the first direction can be reduced, thereby reducing the compression amount of the medium flow channel 32 by the thermostat 43. The flow cross-sectional area of the medium flow channel 32 corresponding to this area is increased, which is conducive to improving the heat dissipation of this area, thereby realizing automatic control of the flow cross-sectional area size of the medium flow channel 32.

[0541] In some embodiments, the width of at least one medium flow channel 32 is different from the widths of the other medium flow channels 32 .

[0542] That is to say, the widths of the medium flow channels 32 are not all the same, that is, the initial flow cross-sectional areas of the medium flow channels 32 are different.

[0543] It should be noted that the greater the width of the medium flow channel 32, the greater the flow cross-sectional area of the medium flow channel 32, and thus the corresponding greater flow rate of the heat exchange medium in the medium flow channel 32. In other words, the flow cross-sectional area of the medium flow channel 32 is controlled according to the width of the medium flow channel 32.

[0544] In this embodiment, the width of the medium flow channel 32 can be designed to be different according to the heat dissipation requirements of different areas of the battery device 100. For example, the width of the medium flow channel 32 corresponding to the high-temperature area of the battery device 100 is generally larger, and the width of the medium flow channel 32 corresponding to the low-temperature area of the battery device 100 is smaller. According to the temperature changes in different areas of the battery device 100, the flow of the heat exchange medium is distributed, the overall temperature of the battery device 100 is accurately adjusted, the heat exchange efficiency and heat exchange effect of the heat exchange component 30 are improved, and the thermal management performance and temperature uniformity of the battery device 100 are improved.

[0545] In some embodiments, see Figures 16 to 19 The heat exchange layer 37 includes a plurality of heat exchange units 372, a plurality of fluid collectors 373 and a plurality of connecting tubes 374. The interior of the heat exchange unit 372 has a medium flow channel 32, and the interior of the fluid collector 373 has a flow collecting space. The two ends of the heat exchange unit 372 are respectively connected to the fluid collector 373 through the connecting tubes 374 to form a medium flow path for the circulation of the heat exchange medium.

[0546] That is, by making the heat exchange unit 372 into a standard unit, the heat exchange assembly 30 is formed by splicing and assembling a plurality of heat exchange units 372 .

[0547] Here, the specific structure of the connecting pipe 374 is not limited here, for example, it is a pipe with a hard structure.

[0548] The medium flow path is defined by the medium flow channel 32 and the collecting space.

[0549] In this embodiment, the heat exchange component 30 is configured to include multiple heat exchange units 372, multiple current collectors 373 and multiple connecting tubes 374, and the two ends of the heat exchange units 372 are respectively connected to the current collectors 373 through the connecting tubes 374 to form a medium flow path for the circulation of the heat exchange medium. That is to say, the heat exchange component 30 can be made into a standard single-unit heat exchange unit 372, and the corresponding heat exchange units 372 can be selected according to the structure of the battery unit assembly 10 to be spliced and assembled into an adaptive heat exchange component 30, thereby reducing the development cycle of the heat exchange component 30 and improving the research and development efficiency of the battery device 100.

[0550] In some embodiments, see Figure 17 and Figure 18 The heat exchange unit 372 has a buffer cavity 371 spaced apart from the medium flow channel 32 inside, and the medium flow channel 32 is provided with a buffer cavity 371 on at least one side along the width direction of the heat exchange unit 372 .

[0551] The buffer cavity 371 is spaced apart from the medium flow channel 32 , that is, the buffer cavity 371 and the medium flow channel 32 are independent of each other, that is, the buffer cavity 371 and the medium flow channel 32 are not connected.

[0552] Here, for example, the buffer cavity 371 is formed by hot pressing while the medium flow channel 32 is formed by hot pressing.

[0553] The buffer cavity 371 is filled with gas, which can play a buffering role when the heat exchange component 30 is hit.

[0554] The buffer cavity 371 is provided on at least one side of the medium flow channel 32 along the width of the heat exchange unit 372. This means that the buffer cavity 371 is provided at the edge of the medium flow channel 32, which helps to improve the buffering effect. The buffer cavity 371 can be provided on one side of the medium flow channel 32 along the width of the heat exchange unit 372, or on both sides of the medium flow channel 32 along the width of the heat exchange unit 372.

[0555] In this embodiment, a buffer cavity 371 is provided on at least one side of the medium flow channel 32 along the width direction of the heat exchange unit 372, which can provide a buffering effect when the heat exchange assembly 30 is impacted. Furthermore, by providing the buffer cavity 371 at the edge of the medium flow channel 32, the buffering effect is improved.

[0556] In some embodiments, see Figures 20 to 22The heat exchange layer 37 includes a quick-change joint 376 and a quick-change interface 3754. The quick-change interface 3754 is connected to the medium flow channel 32. The quick-change joint 376 is arranged at the quick-change interface 3754 and closes the quick-change interface 3754. When the pressure of the heat exchange component 30 reaches the set value, the quick-change joint 376 is connected to the quick-change interface 3754, and the heat exchange medium is discharged through the quick-change interface 3754. The at least two flexible parts 31 are set to a flexible structure.

[0557] The heat exchange assembly 30 includes a quick-change joint 376 and a quick-change interface 3754. Under normal use, the quick-change joint 376 closes the quick-change interface 3754. That is, the settings of the quick-change joint 376 and the quick-change interface 3754 do not affect the normal use of the heat exchange assembly 30.

[0558] When the pressure of the heat exchange assembly 30 reaches the set value, the quick-change connector 376 is connected to the quick-change interface 3754. In this way, the heat exchange medium can be discharged in a targeted manner through the quick-change interface 3754. This can, to a certain extent, prevent damage to other parts of the heat exchange assembly 30. In other words, only the quick-change connector 376 needs to be replaced for continued use, without having to replace the entire battery device 100. This facilitates maintenance and helps reduce costs. In addition, by achieving targeted discharge of the heat exchange medium, the discharged heat exchange medium can be collected or further discharged to the outside.

[0559] Here, the quick-change connector 376 is, for example, a standard part, which enables quick replacement and maintenance.

[0560] It should be noted that the set value in the embodiment of the present disclosure is an absolute value, and the present disclosure does not specifically limit the size of the set value. The size of the set value can be set according to the usage of the battery device 100 and the specific structure of the heat exchange component 30. For example, it can be set according to the structural strength of the flexible part 31 of the heat exchange component 30.

[0561] It should be noted that the pressure of the heat exchange component 30 reaches the set value, including when the heat exchange component 30 is abused or in extreme working conditions, the pressure inside the heat exchange component 30 reaches the set value; it also includes when the pressure on the heat exchange component 30 reaches the set value after the entire vehicle is squeezed by external force.

[0562] In this embodiment, the heat exchange component 30 is provided with a quick-change joint 376 and a quick-change interface 3754. The quick-change joint 376 is provided at the quick-change interface 3754. Under normal use, the quick-change joint 376 closes the quick-change interface 3754. When the pressure of the heat exchange component 30 reaches the set value, the quick-change joint 376 connects the quick-change interface 3754, and the heat exchange medium is discharged in a direction through the quick-change interface 3754. Only the quick-change joint 376 needs to be replaced to continue use, and there is no need to replace the entire battery device 100, which is convenient for maintenance and helps to reduce costs.

[0563] In some embodiments, see Figures 20 to 22 The heat exchange component 30 also includes a connecting port, which is connected to the medium flow channel 32. The heat exchange medium flows into or out of the medium flow channel 32 through the connecting port. The quick-change interface 3754 is arranged near the connecting port.

[0564] Here, the connection port is an inlet 35 or an outlet 36 , and the inlet 35 and the outlet 36 are used to connect to pipelines of the entire vehicle.

[0565] In this embodiment, the quick-change interface 3754 is located near the connection port, that is, near the inlet 35 or near the outlet 36. This facilitates full utilization of the space at the inlet 35 or outlet 36, thereby improving the structural compactness of the battery device 100 and further increasing the energy density of the battery device 100. Furthermore, it facilitates collecting or directing the heat exchange medium discharged from the quick-change interface 3754 to a predetermined location.

[0566] In some embodiments, please refer to Figures 20 to 22 The heat exchange component 30 includes a connector 375, which is connected to the flexible component 31. The connector 375 forms a connecting channel 3751 having the connecting port. The end of the connecting channel 3751 away from the connecting port is connected to the medium flow channel 32. A quick-change branch 3752 is protruding from the side wall of the connector 375. The quick-change branch 3752 forms a drainage channel 3753 having the quick-change interface 3754. The end of the drainage channel 3753 away from the quick-change interface 3754 is connected to the connecting channel 3751.

[0567] Here, the connecting member 375 can be a liquid inlet nozzle, and the connecting port corresponding to the liquid inlet nozzle is the liquid inlet. The connecting member 375 can also be a liquid outlet nozzle, and the connecting port corresponding to the liquid outlet nozzle is the liquid outlet.

[0568] A quick-change branch 3752 is protruding from the side wall of the connecting piece 375, and the quick-change branch 3752 forms a drainage channel 3753 with a quick-change interface 3754. The end of the drainage channel 3753 away from the quick-change interface 3754 is connected to the connecting channel 3751. That is to say, the quick-change branch 3752 is integrated on the connecting piece 375, and the quick-change connector 376 is set on the quick-change branch 3752.

[0569] In this embodiment, a quick-change branch 3752 is integrated on the connecting piece 375, and a quick-change connector 376 is arranged on the quick-change branch 3752. On the one hand, when the pressure of the heat exchange component 30 reaches the set value, the quick-change connector 376 is connected to the quick-change interface 3754 to achieve directional discharge of the heat exchange medium through the quick-change interface 3754. On the other hand, it is helpful to reduce the number of parts and installation space and improve assembly efficiency.

[0570] It should be noted that the specific structure of the quick-change connector 376 is not limited here.

[0571] Exemplarily, the quick-change connector 376 includes a connecting cylinder 3761 arranged in a ring shape and a baffle 3762 arranged at one axial end of the connecting cylinder 3761. The quick-change connector 376 is connected to the quick-change branch 3752 through the connecting cylinder 3761, and together with the baffle 3762, closes the quick-change interface 3754.

[0572] It should be noted that the specific connection method between the quick-change connector 376 and the quick-change branch 3752 is not limited here.

[0573] Exemplarily, the quick-change connector 376 is snap-connected to the quick-change branch 3752 .

[0574] In some embodiments, see Figures 20 to 22 The outer wall of the quick-change branch 3752 is provided with a first card slot, and the quick-change connector 376 is provided with a first buckle, which is engaged with the first card slot.

[0575] Here, the outer side wall of the quick-change branch 3752 may be provided with a ring-shaped first card slot, or may be provided with several spaced first card slots, and the first buckle is adapted to the first card slot.

[0576] Specifically, a circle of first buckles is provided on the inner side wall of the connecting cylinder 3761 of the quick-change connector 376 .

[0577] In this embodiment, the quick-change connector 376 and the quick-change branch 3752 are connected by engaging with the first clip and the first slot. This structure is simple and helps to improve assembly efficiency.

[0578] Of course, in other embodiments, the inner side wall of the quick-change connector 376 may be provided with a first slot, and the quick-change branch 3752 may be provided with a first buckle, and the first buckle may be engaged with the first slot.

[0579] In some embodiments, see Figures 20 to 22 The outer wall of the connecting piece 375 is provided with a second card slot, and the second card slot is used to engage with the external pipe.

[0580] Here, the outer wall of the connecting member 375 may be provided with a ring-shaped second slot, or may be provided with several spaced second slots, and the external pipe is provided with a second buckle, which is adapted to the second slot.

[0581] In this embodiment, the connection between the connecting member 375 and the external pipe is achieved by engaging with the second clip and the second slot. This structure is simple and helps to improve assembly efficiency.

[0582] Of course, in some other embodiments, the inner side wall of the external pipe may be provided with a second slot, and the connector 375 may be provided with a second buckle, and the second buckle may be engaged with the second slot.

[0583] In some embodiments, see Figures 20 to 22 The quick-change connector 376 includes a body and a sealing structure, and the sealing structure is sealed with the body; when the pressure of the heat exchange component 30 reaches a set value, the sealing structure fails and the heat exchange medium is discharged through the sealing port.

[0584] Here, the body and the sealing structure can be an integrated structure, for example, by thinning a portion of the quick-change connector 376 to form a sealing structure. During normal use, the sealing structure is sealed to the body, and the quick-change connector 376 seals the quick-change interface 3754. However, when the pressure in the heat exchange assembly 30 reaches a set value, the pressure damages the sealing structure, causing the sealing structure to fail, and the quick-change connector 376 opens the quick-change interface 3754.

[0585] Of course, the body and the sealing structure can also be separate structures. For example, the sealing structure is a sealing membrane, and the body is provided with a sealing opening, and the sealing membrane is sealingly disposed at the sealing opening. Under normal use, the sealing membrane is sealed to the body, and the quick-change connector 376 closes the quick-change interface 3754. However, when the pressure of the heat exchange assembly 30 reaches a set value, the pressure damages the sealing membrane, causing the sealing structure to fail, and the quick-change connector 376 opens the quick-change interface 3754.

[0586] Here, the connection method between the quick-change connector 376 and the quick-change branch 3752 is not limited, and can be, for example, a threaded connection, a fastened connection, or a snap fit.

[0587] In this embodiment, the quick-change connector 376 is configured to include a main body and a sealing structure. Under normal use, the sealing structure is sealed and connected to the main body, and the quick-change connector 376 closes the quick-change interface 3754. When the pressure of the heat exchange component 30 reaches a set value, the pressure damages the sealing structure, thereby causing the sealing structure to fail. The quick-change connector 376 connects to the quick-change interface 3754, and the heat exchange medium is directionally discharged through the quick-change interface 3754. It is only necessary to replace the quick-change connector 376 to continue using it, without replacing the entire battery device 100, which facilitates maintenance and helps reduce costs.

[0588] In some embodiments, see Figures 20 to 22 The heat exchange assembly 30 also includes a seal (not shown), which is clamped between the quick-change branch 3752 and the quick-change connector 376.

[0589] Here, the specific structure of the sealing member is not limited, for example, it is a sealing ring.

[0590] In this embodiment, a seal is provided between the quick-change branch 3752 and the quick-change joint 376 to seal the assembly gap between the quick-change branch 3752 and the quick-change joint 376. This can prevent the heat exchange medium from flowing out of the assembly gap between the quick-change branch 3752 and the quick-change joint 376 to a certain extent, thereby improving the sealing performance between the quick-change branch 3752 and the quick-change joint 376.

[0591] In some embodiments, see Figures 20 to 22 , the binding force between the connecting member 375 and the quick-change connector 376 is smaller than the binding force between the connecting member 375 and the external pipe.

[0592] Here, the bonding force between the connector 375 and the quick-change connector 376 refers to the connection strength or pressure resistance of the connection structure between the connector 375 and the quick-change connector 376, and the bonding force between the connector 375 and the external pipe refers to the connection strength or pressure resistance of the connection structure between the connector 375 and the external pipe.

[0593] In this way, when the pressure of the heat exchange assembly 30 reaches the set value, the connection structure between the quick-change branch 3752 and the quick-change joint 376 can be destroyed, so that the quick-change interface 3754 is connected to the outside to achieve directional discharge of the heat exchange medium. At the same time, to a certain extent, the connection structure between the connector 375 and the external pipe can be avoided from being damaged.

[0594] In a specific embodiment, please refer to Figures 2 to 4The battery device includes a box assembly 20, a battery cell assembly 10 and a heat exchange assembly 30. The box assembly 20 has a first accommodating cavity 23. The battery cell assembly 10 is disposed in the first accommodating cavity 23. The heat exchange assembly 30 is disposed in the box assembly 20. The heat exchange assembly 30 includes at least two flexible members 31. Figure 3 At least two flexible parts 31 are stacked, and at least one medium flow channel 32 is formed between the flexible parts 31. The at least one medium flow channel 32 is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly 10. The box assembly 20 includes a box body 21 and a bottom guard plate 22. The box body 21 may include a first box body portion 211 and a second box body portion 212. The first box body portion 211 and the second box body portion 212 cover each other, and the first box body portion 211 and the second box body portion 212 jointly define a first accommodating chamber 23 for accommodating the battery cell assembly 10. A second accommodating chamber 24 is formed between the bottom guard plate 22 and the outer wall of the box body 21. The heat exchange assembly 30 is arranged in the second accommodating chamber 24. Part of the bottom guard plate 22 protrudes to form a circle of connecting portions 221, and the connecting portions 221 are sealed and connected to the second box body portion 212. Part of the bottom guard plate 22 is protruding to form a limiting structure 222. The heat exchange assembly 30 is provided with an avoidance hole 33. The limiting structure 222 passes through the avoidance hole 33 to support the second box body 212. The limiting structure 222 is arranged in the central area of the second accommodating cavity 24. At least two flexible parts 31 are set as aluminum-plastic films. At least two flexible parts 31 include a hot pressing area 34. The hot pressing area 34 is constructed so that at least two flexible parts 31 are formed by hot pressing. The hot pressing area 34 separates the heat exchange assembly 30 to form at least one medium flow channel 32. The heat exchange assembly 30 has a raised area 311 and a recessed area 312. The medium flow channel 32 is formed in the raised area 311. The recessed area 312 is an area that is not the medium flow channel 32. The limiting structure 222 abuts against the recessed area 312.

[0595] In one specific embodiment, the flexible member 31 has a layered structure, comprising a corrosion-resistant layer, an isolation layer, and a waterproof layer, arranged in sequence. The waterproof layer is closer to the medium flow channel 32 than the corrosion-resistant layer. The isolation layer has a thickness of 6.5 μm to 15 μm. The corrosion-resistant layer has a thickness of 5 μm to 20 μm. The waterproof layer has a thickness of 50 μm to 120 μm. The flexible member 31 has a thickness of 0.05 mm to 0.3 mm. The elastic modulus of the flexible member 31 is 0.1 MPa to 10,000 MPa.

[0596] It should be noted that the width of the seal can be measured by a vernier caliper before assembly; the distance between the edge of the avoidance hole 33 and the limiting structure 222 can be measured by a vernier caliper after the heat exchange assembly is assembled to the box assembly; the width of the hot pressing area 34 can be measured by a vernier caliper before assembly; the thickness of the corrosion-resistant layer, the isolation layer and the waterproof layer can be measured by a vernier caliper; the thickness of the flexible part 31 can be measured by a vernier caliper before assembly. It should be noted that the above measurements can all be carried out at normal temperature and pressure.

[0597] The elastic modulus of the flexible member 31 may be measured by at least one of a static tensile test method, a dynamic test method, a sonic velocity method, a nanoindentation method, and a bending method. The measuring instrument may include a nanoindenter and a universal testing machine.

[0598] For example, the elastic modulus of the flexible member 31 can be measured at room temperature and pressure by nanoindentation. The nanoindentation method uses a tiny indenter to indent the surface of the flexible member 31 and calculates the elastic modulus by analyzing the relationship between the indentation depth and the load.

[0599] In the description of the present disclosure, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present disclosure. In the present disclosure, the schematic representations 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 a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present disclosure and features of different embodiments or examples, unless they are mutually inconsistent.

[0600] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: The box assembly has a first accommodating cavity therein; A battery cell assembly is disposed in the first accommodating cavity; A heat exchange assembly is arranged in the box assembly; wherein, the heat exchange assembly includes at least two flexible parts, the at least two flexible parts are stacked, and at least one medium flow channel is formed between the flexible parts, the at least one medium flow channel is used to conduct a heat exchange medium, and the heat exchange medium is used to exchange heat with the battery cell assembly.

2. The battery device according to claim 1, wherein: The heat exchange component is arranged outside the first accommodating cavity.

3. The battery device according to claim 2, characterized in that The box assembly includes a box body and a bottom guard plate. The box body includes a first box body part and a second box body part. The first accommodating cavity is formed between the first box body part and the second box body part. The second accommodating cavity is formed between the bottom wall of the second box body part and the bottom guard plate. The heat exchange assembly is arranged in the second accommodating cavity.

4. The battery device according to claim 3, characterized in that Part of the bottom guard plate protrudes to form a circle of connecting parts, and the connecting parts are sealed and connected to the second box body part.

5. The battery device according to claim 4, characterized in that The box assembly further includes a sealing member, which is sealingly sandwiched between the connecting portion and the second box portion.

6. The battery device according to claim 5, characterized in that The width of the sealing member is 2 mm to 20 mm.

7. The battery device according to claim 3, characterized in that Part of the bottom guard plate is protruding to form a limiting structure, and the limiting structure is used to support the heat exchange component.

8. The battery device according to claim 3, wherein: Part of the bottom guard plate is protruding to form a limiting structure. The heat exchange component is provided with an avoidance hole. The limiting structure passes through the avoidance hole to support the second box body.

9. The battery device according to claim 3, characterized in that Part of the second box body is protruding to form a limiting structure, and the limiting structure is used to support the heat exchange component.

10. The battery device according to claim 3, wherein: Part of the second box body is protruding to form a limiting structure. The heat exchange component is provided with an avoidance hole. The limiting structure passes through the avoidance hole to support the bottom guard plate.

11. The battery device according to claim 8 or 10, characterized in that: The distance between the edge of the flexible member forming the avoidance hole and the limiting structure is 0.5mm-1mm.

12. The battery device according to claim 8 or 10, characterized in that: The height of the limiting structure is greater than or equal to the thickness of the heat exchange component.

13. The battery device according to claim 7, wherein: The limiting structure is arranged in the central area of the second accommodating cavity.

14. The battery device according to claim 8 or 10, characterized in that: The avoidance holes are provided in plurality, and the plurality of avoidance holes are symmetrically arranged relative to the center line of the heat exchange component.

15. The battery device according to claim 8 or 10, characterized in that: The length extension direction of the avoidance hole is consistent with the arrangement direction of the multiple battery cells in the battery cell assembly.

16. The battery device according to claim 8, characterized in that A gap between the avoidance hole and the limiting structure in the length direction is greater than or equal to 0 and less than or equal to 5 mm.

17. The battery device according to claim 16, characterized in that A gap between the avoidance hole and the limiting structure in the length direction is greater than or equal to 2 mm and less than or equal to 3 mm.

18. The battery device according to claim 1, wherein: The at least two flexible parts include a hot pressing area, and the hot pressing area is configured such that the at least two flexible parts are formed by hot pressing. The hot pressing area separates the heat exchange component to form the at least one medium flow channel.

19. The battery device according to claim 18, wherein: The width of the hot pressing area is 0.5 mm to 5 mm.

20. The battery device according to claim 19, wherein: The width of the hot pressing area is 2mm-3mm.

21. The battery device according to claim 18, wherein: The hot pressing area is provided with avoidance holes.

22. The battery device according to claim 1, wherein: The box assembly is provided with a limiting structure, the heat exchange assembly has a raised area and a recessed area, the medium flow channel is formed in the raised area, the recessed area is a non-medium flow channel area, and the limiting structure abuts against the recessed area.

23. The battery device according to claim 22, characterized in that The recessed area of the flexible member has a penetrating avoidance hole, and the limiting structure is arranged in the avoidance hole.

24. The battery device according to claim 23, characterized in that A portion of the box assembly forms the limiting structure, and the limiting structure passes through the avoidance hole and abuts against another portion of the box assembly.

25. The battery device according to claim 24, characterized in that The box assembly further includes an adhesive layer, and the limiting structure is bonded to another part of the box assembly via the adhesive layer.

26. The battery device according to claim 24, characterized in that The box body assembly includes a box body and a bottom guard plate, the box body includes a first box body part and a second box body part, a first accommodating cavity is formed between the first box body part and the second box body part, a second accommodating cavity is formed between the bottom guard plate and the second box body part, the heat exchange assembly is arranged in the second accommodating cavity, and the limiting structure is formed on the side of the bottom guard plate and / or the second box body part close to the second accommodating cavity.

27. The battery device according to claim 26, characterized in that The heat exchange assembly is arranged in the first accommodating cavity, and the limiting structure is formed on a side of the first box body and / or the second box body close to the first accommodating cavity.

28. The battery device according to any one of claims 1 to 10, characterized in that: The at least two flexible members are configured as metal plasticized films.

29. The battery device according to claim 28, characterized in that The at least two flexible members are configured as aluminum-plastic films.

30. The battery device according to any one of claims 1 to 10, characterized in that: The flexible member is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked in sequence.

31. The battery device according to claim 30, characterized in that The metal layer includes one of aluminum foil, copper foil and steel foil.

32. The battery device according to claim 30, wherein: The non-metallic layer includes one of polypropylene, polyvinyl chloride and polyethylene.

33. The battery device according to claim 30, characterized in that The non-metallic layer is a hot-melt layer.

34. The battery device according to any one of claims 1 to 10, characterized in that: The flexible member is a layered structure, and includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the medium flow channel than the corrosion-resistant layer.

35. The battery device according to claim 34, characterized in that The thickness of the isolation layer is 6.5 μm-100 μm.

36. The battery device according to claim 35, characterized in that The thickness of the isolation layer is 6.5 μm-15 μm.

37. The battery device according to claim 34, characterized in that The thickness of the corrosion-resistant layer is 5 μm-20 μm.

38. The battery device according to claim 34, wherein: The thickness of the waterproof layer is 50 μm-120 μm.

39. The battery device according to any one of claims 1 to 10, characterized in that: The thickness of the flexible member is 0.05mm-0.3mm.

40. The battery device according to claim 39, wherein: The thickness of the flexible member is 0.08 mm to 0.2 mm.

41. The battery device according to any one of claims 1 to 10, characterized in that: The elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

42. A heat exchange component, characterized in that: The heat exchange component includes at least two flexible parts, which are stacked and at least one medium flow channel is formed between the flexible parts. The at least one medium flow channel is used to conduct heat exchange medium, and the heat exchange medium is used to exchange heat with the heat exchange monomer component.

43. The heat exchange assembly according to claim 42, characterized in that The heat exchange component is provided with an avoidance hole, and the avoidance hole runs through two opposite sides of the heat exchange component.

44. The heat exchange assembly according to claim 43, characterized in that The avoidance holes are provided in plurality, and the plurality of avoidance holes are symmetrically arranged relative to the center line of the heat exchange component.

45. The heat exchange assembly according to claim 42, characterized in that The at least two flexible parts include a hot pressing area, and the hot pressing area is configured such that the at least two flexible parts are formed by hot pressing. The hot pressing area separates the heat exchange component to form the at least one medium flow channel.

46. The heat exchange assembly according to claim 45, characterized in that The width of the hot pressing area is 0.5 mm to 5 mm.

47. The heat exchange assembly according to claim 46, characterized in that The width of the hot pressing area is 2mm-3mm.

48. The heat exchange assembly according to claim 45, characterized in that The hot pressing area is provided with avoidance holes.

49. The heat exchange assembly according to claim 42, characterized in that The heat exchange component has a convex area and a concave area, the medium flow channel is formed in the convex area, the concave area is a non-medium flow channel area, and the flexible member is hot-pressed in the concave area.

50. The heat exchange assembly according to claim 49, characterized in that The recessed area is provided with a penetrating avoidance hole.

51. The heat exchange assembly according to any one of claims 42 to 50, characterized in that: The at least two flexible members are configured as metal plasticized films.

52. The heat exchange assembly according to claim 51, characterized in that The at least two flexible members are configured as aluminum-plastic films.

53. The heat exchange assembly according to any one of claims 42 to 50, characterized in that: The flexible member is a layered structure, comprising a metal layer and a non-metal layer, wherein the metal layer and the non-metal layer are stacked in sequence.

54. The heat exchange assembly according to claim 53, characterized in that The metal layer includes one of aluminum foil, copper foil and steel foil.

55. The heat exchange assembly according to claim 53, characterized in that The non-metallic layer includes one of polypropylene, polyvinyl chloride and polyethylene.

56. The heat exchange assembly according to claim 53, characterized in that The non-metallic layer is a hot-melt layer.

57. The heat exchange assembly according to any one of claims 42 to 50, characterized in that: The flexible member is a layered structure, and includes a corrosion-resistant layer, an isolation layer, and a waterproof layer arranged in sequence. The waterproof layer is closer to the medium flow channel than the corrosion-resistant layer.

58. The heat exchange assembly according to claim 57, characterized in that The thickness of the isolation layer is 6.5 μm-100 μm.

59. The heat exchange assembly according to claim 58, characterized in that The thickness of the isolation layer is 6.5 μm-15 μm.

60. The heat exchange assembly according to claim 57, characterized in that The thickness of the corrosion-resistant layer is 5 μm-20 μm.

61. The heat exchange assembly according to claim 57, characterized in that The thickness of the waterproof layer is 50 μm-120 μm.

62. The heat exchange assembly according to any one of claims 42 to 50, characterized in that: The thickness of the flexible member is 0.05mm-0.3mm.

63. The heat exchange assembly according to claim 62, characterized in that The thickness of the flexible member is 0.08 mm to 0.2 mm.

64. The heat exchange assembly according to any one of claims 42 to 50, characterized in that: The elastic modulus of the flexible member is 0.1 MPa-10000 MPa.

65. An electrical device, characterized in that: The method comprises the battery device according to any one of claims 1 to 41 or the heat exchange component according to any one of claims 42 to 64.

66. An energy storage device, characterized in that The method comprises the battery device according to any one of claims 1 to 41 or the heat exchange component according to any one of claims 42 to 64.

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