Cooling and insulation structure for a battery pack and battery pack

Abstract

The application discloses a cooling and heat insulation structure for a battery pack and the battery pack. The cooling and heat insulation structure comprises: an encapsulation shell configured to internally form a closed containing space; a phase change material arranged in the containing space; a support arranged in the containing space and dividing the containing space into a plurality of sub-containing spaces, each of which is provided with the phase change material; and a heat insulation material layer arranged between the phase change material and the support. In the normal temperature fast charging, high temperature fast charging and other charging and discharging conditions of the battery pack, the phase change material can absorb heat to cool the battery pack, effectively reducing the temperature of the battery pack in the charging and discharging conditions. In addition, the heat insulation material layer is embedded in the structure, which can effectively block the heat transfer between the battery monomers when the battery pack is out of control, thereby significantly improving the safety of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cooling and heat insulation structure for a battery pack and a battery pack. Background Technology

[0002] Current lithium battery packs mainly consist of a casing, cover, cell assembly, module assembly, electrical components, and thermal management system components. Current battery thermal management systems primarily cool the battery pack using methods such as air cooling, liquid cooling, and phase change materials. Advances in battery technology and user demands have driven up the charge / discharge rates of battery cells, moving from the initial low rate of 0.25C to the high rate of 6C. Traditional air cooling and liquid cooling methods are clearly insufficient to meet the heat dissipation requirements of 6C high-rate charge / discharge.

[0003] In the battery industry, air cooling, liquid cooling, and phase change cooling are common thermal management methods. Among these, natural air cooling or forced air cooling for battery packs typically has a heat transfer coefficient of 5~100 W / (m²). 2 For cells charging and discharging at a rate of 0.25C, this cooling method can meet the heat dissipation requirements of the battery pack to a certain extent. However, for higher charging and discharging rates, natural air cooling / forced air cooling is not effective in dissipating heat and can easily cause localized high temperatures. Currently, liquid cooling is the mainstream cooling method, with good heat dissipation performance and a simple structure. Liquid cooling plates come in various forms, the most common being a bottom liquid cooling structure. There are also structures with bottom liquid cooling plus side liquid cooling, and structures with bottom liquid cooling plus top liquid cooling, etc. For high-rate 4C charging and discharging conditions, bottom liquid cooling alone cannot fully meet the heat dissipation requirements of the cell. The high-temperature area at the top of the cell is more obvious, and the heat dissipation capacity at the top is relatively poor. Currently, to meet the demands of high-rate charging and discharging, multi-faceted cooling technologies, such as bottom-side cooling plus top-side cooling, bottom-side cooling plus side cooling, and bottom-side cooling plus large-area cooling, have been developed and applied to products. Multi-faceted cooling effectively ensures the heat dissipation requirements of the battery cell under high-rate charging and discharging conditions, maintaining the cell temperature within a reasonable range and improving temperature uniformity, thereby enhancing cell lifespan and electrical performance. However, multi-faceted cooling technology often involves a large number of pipes, which are too close to the aluminum foil in the battery cell. Under thermal runaway conditions, these pipes can easily ignite and arc with the foil, leading to combustion or even explosion. Therefore, its reliability needs further improvement. Furthermore, the design of side, large-area, and top cooling plates in multi-faceted cooling systems somewhat compromises the large-area insulation, thus reducing safety. Utility Model Content

[0004] To address the problems of the prior art, this application provides a battery pack control system to solve one or more technical problems existing in the prior art.

[0005] In a first aspect, this application provides a cooling and heat insulation structure for a battery pack, the cooling and heat insulation structure comprising: The enclosure is configured to form a closed receiving space inside; A phase change material is disposed within the containing space; A support member is disposed within the receiving space, dividing the receiving space into multiple sub-receiving spaces, and the phase change material is disposed in each of the sub-receiving spaces; A thermal insulation layer is disposed between the phase change material and the support member.

[0006] The cooling and heat insulation structure for battery packs provided in this application embodiment can cool the battery pack by absorbing heat through phase change materials under charging and discharging conditions such as normal temperature fast charging and high temperature fast charging, effectively reducing the temperature of the battery pack under charging and discharging conditions. Secondly, the structure incorporates a heat insulation material layer, which can effectively block the transfer of heat between battery cells when thermal runaway occurs in the battery pack, significantly improving the safety of the battery pack.

[0007] Furthermore, in this application, the heat insulation material layer is coated on the surface of the support member facing the phase change material; Alternatively, the insulation material layer may include an insulation carrier and an insulation material coated on the insulation carrier.

[0008] This application solution reduces the heat barrier of the battery pack in the large area by adding a heat insulation material layer, effectively alleviating the problem of heat transfer during the heat spread and diffusion process of the battery pack, thereby improving the safety of the battery pack. Furthermore, by adopting a combination of heat insulation carrier and coated heat insulation material, different thermal conductivity carrier substrates can be selected according to actual needs. At the same time, the thickness and uniformity of the heat insulation layer can be precisely controlled through the coating process, taking into account both mechanical strength and thermal barrier performance.

[0009] Furthermore, in this application, the support member is in the form of a cross structure, an I-beam structure, or a plurality of connected cross structures.

[0010] In this application, the support component not only isolates heat transfer between batteries, but also acts as a reinforcing rib to increase the mechanical strength of the structure.

[0011] Furthermore, in this application, the support member is integrally formed with the packaging shell.

[0012] Furthermore, in this application, the encapsulation housing includes a body and a cover, the body forming the receiving space, and the cover covering the opening of the body to close the receiving space.

[0013] Furthermore, in this application, the cover is provided with a through hole, which is configured to inject the phase change material into the receiving space.

[0014] Furthermore, in this application, the cooling and heat insulation structure further includes: A sealing element is disposed in the through hole to seal the through hole.

[0015] Furthermore, in this application, the cooling and heat insulation structure also includes a frame, which surrounds the encapsulation housing, and the width of the frame is greater than or equal to the thickness of the encapsulation housing.

[0016] Furthermore, in this application, the cooling and heat insulation structure further includes: A thermally conductive structure is disposed on the side of the packaging housing away from the receiving space, the thermally conductive structure comprising a thermally conductive substrate and a thermally conductive material disposed on the surface of the thermally conductive substrate.

[0017] The present application solution, by setting a heat-conducting structure on the outside of the encapsulation shell, further effectively blocks the heat transfer between battery cells and avoids rapid heat spread between battery cells.

[0018] In a second aspect, this application provides a battery pack, comprising: The housing has a receiving cavity; A battery cell, wherein the battery cell is located in the accommodating cavity; The cooling and heat insulation structure for a battery pack as described in any of the first aspects, wherein the cooling and heat insulation structure is provided between two adjacent battery cells.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1 This is a schematic diagram of the cooling and heat insulation structure for a battery pack provided in Embodiment 1 of this application; Figure 2 This is a cross-sectional schematic diagram of the cooling and heat insulation structure for a battery pack provided in Embodiment 1 of this application; Figure 3 This is a partial structural schematic diagram of the cooling and heat insulation structure for a battery pack provided in Embodiment 1 of this application; Figure 4This is a schematic diagram of the cooling and heat insulation structure for a battery pack provided in Embodiment 2 of this application; Figure 5 This is a cross-sectional schematic diagram of the cooling and heat insulation structure for a battery pack provided in Embodiment 2 of this application; Figure 6 This is a cross-sectional schematic diagram of the heat-conducting structure provided in Embodiment 2 of this application; Figure 7 This is a schematic diagram of a portion of the battery pack structure provided in Embodiment 3 of this application.

[0021] Explanation of reference numerals in the attached figures: 100. Encapsulation shell; 110. Receiving space; 111. Sub-receiving space; 120. Main body; 130. Cover; 131. Through hole; 200. Phase change material; 300. Support component; 400. Thermal insulation material layer; 500. Sealing component; 600. Frame; 700. Thermally conductive structure; 710. Thermally conductive substrate; 720. Thermally conductive material; 1000. Cooling and thermal insulation structure; 2000. Battery cell. Detailed Implementation

[0022] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0023] As described in the background section, current lithium battery products suffer from thermal management issues under high-rate charge / discharge conditions and thermal safety risks associated with multi-faceted cooling structures. To address these issues, this application proposes a cooling and insulation structure for a battery pack and the battery pack itself. This cooling and insulation structure, through the collaborative design of a housing 100, a phase change material 200, a support 300, and an insulation material layer 400, addresses the issue of high-rate charge / discharge of the battery pack. It utilizes the phase change material's phase change heat transfer to rapidly cool the battery pack, effectively improving its heat dissipation performance under high-temperature, high-rate charge / discharge conditions and enhancing temperature uniformity among individual battery cells, thereby improving cell lifespan and electrical performance. Furthermore, addressing the poor safety of multi-faceted cooling, this structure reduces heat blockage in the large-area direction of the battery pack by incorporating the insulation design of the insulation material layer, effectively mitigating heat transfer issues during thermal propagation and diffusion, thus improving battery pack safety.

[0024] The solution of this application will now be described in detail with reference to the accompanying drawings and various embodiments.

[0025] Example 1 Figure 1 This is a schematic diagram of the cooling and heat insulation structure for a battery pack provided in an embodiment of this application, with reference to... Figure 1As shown, the cooling and heat insulation structure includes at least a housing 100, a phase change material 200, a support member 300, a heat insulation material layer 400, and a frame 600. The housing 100 is configured to form a closed receiving space 110 inside, within which the phase change material 200, support member 300, and heat insulation material layer 400 are all disposed. The frame 600 surrounds the housing 100. The frame 600 is located outside the housing 100 and its main function is to provide positioning and cushioning, preventing damage to the cooling and heat insulation structure from mechanical stress. The main function of the housing 100 is to support the phase change material 200, support member 300, and heat insulation material layer 400 within it, encapsulating these components in the internal receiving space 110 to prevent leakage of the phase change material 200 during heat absorption and phase change. The main function of the phase change material 200 is to absorb the heat generated by the battery during charge and discharge, thus lowering its temperature, utilizing its high latent heat. Because it is positioned on the large surface area of ​​the battery cells when assembled into the battery pack, its heat dissipation effect is significant. The support component 300 primarily provides support to ensure necessary mechanical strength. The thermal insulation material layer 400 is arranged on both sides of the support component 300. Utilizing the low thermal conductivity of the insulation material, it effectively blocks heat transfer between battery cells under thermal runaway conditions, preventing rapid heat propagation between battery cells and even combustion or explosion.

[0026] Reference Figure 2 As shown, in some specific embodiments, phase change material 200 and heat insulation material layer 400 are provided on both sides of the support member 300. The phase change material 200 and heat insulation material layer 400 are arranged symmetrically on both sides in the cooling and heat insulation structure.

[0027] Further reference Figure 1 As shown, in some specific embodiments, the encapsulation housing 100 includes a main body 120 and a cover 130. The main body 120 is the core structure of the encapsulation housing 100, forming an enclosed receiving space 110 inside to accommodate the phase change material 200, the support member 300, and the heat insulation material layer 400. Its sidewalls and bottom form a stable load-bearing frame. The cover 130 seals the receiving space 110 by covering the opening of the main body 120. The cover 130 and the main body 120 are detachably or fixedly connected (e.g., by snap-fit, welding, bolt locking, etc.) to ensure the integrity of the encapsulation. For example, the cover 130 and the main body 120 can be fixed by welding and bonding; that is, the cover 130 is first welded to the main body 120, and then high-strength adhesive is used at the joint to ensure a sealing effect.

[0028] It should be noted that the encapsulation housing 100 adopts a split design, which on the one hand facilitates the pre-filling of phase change material 200, support 300 and heat insulation material layer 400, simplifying the production process; on the other hand, the cover 130 can be opened to replace internal components or replenish phase change material, adapting to long-term use needs.

[0029] In some specific embodiments, the material of the encapsulation shell 100 may be a thermoplastic polyolefin (TPO) waterproof membrane. Thermoplastic polyolefin (TPO) waterproof membrane is a sheet-like thermoplastic rubber elastic waterproof material made of ethylene resin as a base material using advanced polymerization technology and specific formulation. It has long-lasting plasticity, high mechanical strength, excellent physical properties, and strong low-temperature resistance (no cracking at -40℃).

[0030] When selecting thermoplastic polyolefin (TPO) waterproof membrane as the material for the encapsulation housing 100, the wall thickness of the encapsulation housing 100 can be set between 0.2 and 1 mm. Preferably, the wall thickness of the encapsulation housing 100 is 0.5 mm, and its height and length dimensions are the same as those of the battery cell. The specific dimensions can be determined according to the dimensions of the battery cell, and are not specifically limited here.

[0031] In some specific embodiments, the material of the encapsulation shell 100 can be an ultra-thin steel profile. This application does not limit the specific type of ultra-thin steel profile; it can be selected according to actual product requirements. When selecting an ultra-thin steel profile for the encapsulation shell 100, its wall thickness can be set between 0.1 and 0.3 mm. Preferably, the wall thickness of the encapsulation shell 100 is 0.2 mm, and its height and length dimensions are the same as those of the battery cell. The specific dimensions can be determined according to the dimensions of the battery cell and are not specifically limited here.

[0032] In some specific embodiments, the phase change material 200 includes, but is not limited to, high latent heat phase change materials such as paraffin or modified paraffin. These materials typically have a phase change temperature between 48°C and 157°C, effectively covering the operating temperature range of the battery pack. Furthermore, these materials possess high latent heat, enabling rapid cooling of the battery pack during charging and discharging. Since the phase change material 200 is arranged between the large surfaces of the battery cells after the cooling and insulation structure is assembled into the battery pack, the heat exchange area is large, thus significantly increasing its cooling effect. When paraffin or modified paraffin is selected as the phase change material 200, its thickness can be set between 0.5 and 2 mm. Preferably, the thickness of the phase change material 200 is 1.5 mm, and its height and length dimensions are the same as those of the battery cells. The specific dimensions can be determined according to the dimensions of the battery cells and are not specifically limited here.

[0033] In some specific embodiments, the phase change material 200 can also be a liquid-gas phase change material. For example, 1,1,1,2-tetrafluoroethane (R134a refrigerant) can be used as the phase change material 200, and its thickness can be set between 1.5 and 2.5 mm. Preferably, the thickness of the phase change material 200 is 2 mm. Similarly, its height and length dimensions are the same as those of the battery cell. The specific dimensions can be determined according to the dimensions of the battery cell and are not specifically limited here.

[0034] Further reference Figure 3 As shown, in some specific embodiments, the support member 300 is disposed within the receiving space 110 of the encapsulation housing 100 and divided into multiple independent sub-receiving spaces 111. Each sub-receiving space 111 is filled with phase change material 200, ensuring that the phase change material 200 is evenly and controllably distributed. It is understood that multiple sub-receiving spaces 111 allow the phase change material 200 to be distributed in a dispersed manner, increasing the contact area with the battery pack, improving heat absorption / release efficiency, enhancing temperature uniformity, preventing uneven distribution of the phase change material 200 due to molten flow, ensuring stable heat dissipation performance, and facilitating precise filling and encapsulation of the phase change material 200, simplifying the production process. If repair or replacement is required, operation can be performed on a specific sub-receiving space, reducing maintenance costs.

[0035] Furthermore, the design of the support member 300, which divides the accommodating space 110 into multiple independent sub-accommodating spaces 111, can also prevent structural deformation caused by volume expansion or contraction of the phase change material 200 during the phase change process, thus maintaining overall mechanical strength. This is particularly suitable for vibration or shock environments (such as electric vehicle battery packs), reducing the risk of material displacement.

[0036] It should be noted that, in this embodiment, the size and layout of the sub-accommodating space 111 can be flexibly adjusted to adapt to different battery pack sizes or thermal management requirements, facilitating customized design. In the event of partial damage, the failure of a single sub-accommodating space 111 does not affect the overall function, thus improving system reliability.

[0037] In some specific embodiments, the support member 300 adopts a design form of a cross structure, an I-beam structure, or multiple connected cross structures. A cross structure consists of two mutually perpendicular reinforcing ribs crossing each other; an I-beam structure includes two opposing horizontal plates and a central vertical web connecting the two horizontal plates; and multiple connected cross structures form a grid-like frame through repeated unit combinations. The above structures can be achieved through integral molding or separate welding processes. It is understood that the cross and I-beam structures can significantly improve bending and torsional resistance by dispersing stress through multi-directional ribs; while multiple connected crosses forming a spatial grid can further balance load distribution, making them suitable for complex stress environments. Furthermore, the cross intersection nodes and I-beam cross sections can suppress local buckling, and multiple cross units can be combined to expand into a large support frame, adapting to large spans or high-frequency vibration conditions. In summary, the support member 300, in addition to isolating heat transfer between battery cells, also increases the mechanical strength of the structure.

[0038] It should be noted that the material of the support member 300 is not limited in this embodiment. Without departing from the inventive concept of this application, it can be selected according to actual product requirements. For example, the material of the support member 300 can be high-strength steel, aluminum alloy, or engineering plastic to meet different load requirements.

[0039] In some specific embodiments, the thermal insulation material layer 400 is coated on the surface of the support member 300 facing the phase change material 200. That is, the thermal insulation material layer 400 is uniformly covered on the surface of the support member 300 in contact with the phase change material 200 through a coating process, forming a dense thermal insulation barrier. This coating process can employ methods such as spraying, dipping, or vapor deposition to ensure a tight bond between the material layer and the support member surface, while maintaining uniform thickness to meet design requirements. After coating, the thermal insulation material layer 400 effectively blocks the direct heat conduction path between the support member 300 and the phase change material 200.

[0040] In other specific embodiments, the thermal insulation layer 400 consists of a thermal insulation carrier (not shown) and a thermal insulation material coated on the surface of the thermal insulation carrier. The thermal insulation carrier can be a lightweight, high-strength substrate (such as ceramic fiber, porous metal, or polymer film) to provide structural support and ensure uniform adhesion of the coating. The thermal insulation material (such as aerogel, nano-ceramic coating, or reflective film) is coated onto the surface of the carrier by processes such as spraying, impregnation, or vapor deposition to form a dense thermal barrier with low thermal conductivity. This composite structure achieves a balance between efficient thermal insulation and mechanical properties through the synergistic effect of the carrier and the coating.

[0041] In some specific embodiments, the thermal insulation material can be selected from aerogel or pre-oxidized filament aerogel (such as pre-oxidized filament-silica composite ceramic material), etc. These materials have extremely low thermal conductivity and can effectively block heat transfer between cells under thermal runaway conditions, preventing further heat diffusion of the battery pack, thereby significantly improving the safety of the battery pack. As an exemplary and not limiting illustration, the thickness of the thermal insulation material can be set between 0.5 and 1.5 mm. Preferably, the thickness of the thermal insulation material is 1 mm, and its height and length dimensions are the same as those of the battery cell. The specific dimensions can be determined according to the dimensions of the battery cell and are not specifically limited here.

[0042] Further reference Figure 1 As shown, in some specific embodiments, the cooling and heat insulation structure further includes a frame 600, which surrounds the encapsulation housing 100 to form a stable external support structure. The width of the frame 600 is equal to the thickness of the encapsulation housing 100, and their sidewalls are completely flush. The frame 600 provides uniform preload in the stacking direction and can buffer external impacts on the encapsulation housing 100, preventing damage to the cooling and heat insulation structure from mechanical stress. As an exemplary and not limiting illustration, the frame 600 can be configured to be U-shaped. The frame 600 can be made of common aerogel materials (such as inorganic materials such as glass fiber and ceramic fiber) or pre-oxygenated fiber aerogel, and is tightly connected to the encapsulation housing 100 by mechanical fixing, welding, or bonding.

[0043] To ensure that the enclosure 100 is protected from direct impact from external mechanical stress during subsequent assembly, transportation, and use, in some specific embodiments, the width of the frame 600 is greater than the thickness of the enclosure 100. This arrangement allows the edges of the frame 600 to extend sufficiently outward from both sides of the enclosure 100, forming a "protective barrier" or "buffer zone" protruding from the surface of the enclosure 100. When external forces act laterally on the component, the protruding frame 600 will preferentially contact and bear most of the impact and pressure, thereby effectively preventing direct collision, scratching, or compression between the enclosure 100 and its internal components. This design significantly improves the structural rigidity and resistance to mechanical damage of the entire cooling and insulation structure, providing crucial physical protection for core functional components.

[0044] In some specific embodiments, the difference 'a' between the width of the frame 600 and the thickness of the packaging shell 100 satisfies 0 < a ≤ 0.5 mm. This setting can both protect the packaging shell 100 and prevent the battery cell and the cooling insulation structure from not fitting tightly due to an excessively wide frame 600, which would affect the cooling effect. Moreover, an excessively wide frame 600 would also accumulate between the battery cell and the cooling insulation structure, affecting installation and stability.

[0045] Example 2 The difference from Embodiment 1 is that, referring to Figures 4 to 6 As shown in the embodiment of this application, the support 300 and the encapsulation shell 100 are manufactured using an integral molding process, that is, by molding technologies such as injection molding, die casting, or 3D printing, the two are formed into an integral structure, rather than being assembled later. This design can use the same or compatible materials (such as engineering plastics, aluminum alloys, high-strength steel, or composite materials) to ensure that the mechanical properties and coefficients of thermal expansion are matched, avoiding thermal stress cracking or connection failure caused by material differences.

[0046] Further reference Figure 4 As shown, in some specific embodiments, a through-hole 131 is provided on the cover 130. This through-hole 131 penetrates the cover 130 and communicates with the receiving space 110 inside the encapsulation housing 100, serving as a filling channel for the phase change material 200. The size and position of the through-hole 131 can be designed according to actual product requirements to ensure that the phase change material 200 can be efficiently and uniformly filled into the receiving space 110, while avoiding air bubbles or residual voids. It is understood that the through-hole 131 provides a direct filling path, simplifying the filling process of the phase change material 200, and is especially suitable for high viscosity or solid-liquid phase change materials. If the phase change material 200 needs to be replaced or replenished periodically, the through-hole 131 can serve as an interface for repeated filling, improving maintenance convenience. The design of the through-hole 131 is compatible with various filling methods (such as pressure injection and vacuum filling) and adapts to the physical properties of different phase change materials 200 (such as flowability and curing speed).

[0047] One or more through holes 131 can be provided. If one through hole 131 is provided, it can be located in the middle of the cover 130, with the support member 300 positioned slightly lower than the main body 120 to ensure a gap between the top of the support member 300 and the cover 130, allowing the phase change material 200 to be injected smoothly. If two through holes 131 are provided, they can be located at both ends of the cover 130 (in the width direction). The height of the support member 300 can be set to the same height as the main body 120, with no gap between the top of the support member 300 and the cover 130. The two through holes 131 correspond to the sub-accommodating spaces 111 on both sides of the support member 300, allowing the phase change material 200 to be injected into the two sub-accommodating spaces 111 through the two through holes 131, resulting in better heat insulation. Furthermore, more than two through holes 131 can be provided according to actual product requirements, and their positions can be set as needed, which will not be elaborated here.

[0048] The through-hole 131 can be sealed using a removable or permanent sealing method to ensure that the phase change material 200 does not leak or oxidize during long-term use. Further reference... Figure 4As shown, in some specific embodiments, the cooling and heat insulation structure further includes a seal 500, which is fitted into the through hole 131 of the cover 130 to achieve a reliable seal of the through hole 131. That is, the seal 500 can prevent the phase change material 200 from overflowing through the through hole 131 or coming into contact with the external environment, preventing external dust, moisture and other contaminants from entering the containment space 110, and avoiding material loss or performance degradation (such as oxidation, moisture absorption).

[0049] In some specific embodiments, the seal 500 may be a resilient sealing plug, threaded plug, welded sealing plate, or hot melt adhesive, etc., and its material selection must be compatible with the characteristics of the phase change material 200 and the working environment (such as high-temperature resistant silicone, fluororubber, or metal sealing ring). The seal 500 is fixed by interference fit, threaded locking, or chemical bonding to ensure that it can withstand pressure fluctuations caused by volume changes during the phase change of the phase change material 200 without failure.

[0050] Further reference Figure 6 As shown, in some specific embodiments, the cooling and heat insulation structure further includes a heat-conducting structure 700, which is disposed on the outside of the encapsulation housing 100 (i.e., the side facing away from the receiving space 110). Specifically, the heat-conducting structure 700 consists of a heat-conducting substrate 710 and a heat-conducting material 720 covering its surface. The heat-conducting substrate 710 can be made of metal sheet (such as aluminum or copper), graphite sheet, or composite material, providing structural support and a basic heat conduction path. The heat-conducting material 720 can be aluminum nitride or a high-temperature resistant heat-conducting coating to enhance heat transfer efficiency. The heat-conducting structure 700 can be fixed to the encapsulation housing 100 by welding, riveting, or thermally conductive adhesive bonding, forming a heat dissipation channel from the phase change material 200 to the external environment.

[0051] It should be noted that the specific size and shape of the heat-conducting structure 700 are not limited in the embodiments of this application. Without departing from the inventive concept of this application, it can be set according to actual product requirements. In some specific embodiments, the thickness of the heat-conducting structure 700 can be set between 0.1 and 0.3 mm. Preferably, the thickness of the heat-conducting structure 700 is 0.2 mm, and its height and length dimensions are the same as the height and length of the battery cell, depending on the size of the battery cell. The heat-conducting structure 700 can be configured as a sheet-like structure to increase the contact area with the encapsulation housing 100.

[0052] Example 3 Corresponding to Embodiment 1 or 2 above, this application provides a battery pack, as shown in the following embodiment. Figure 7As shown, the battery pack includes a housing (not shown), individual battery cells 2000, and a cooling and heat insulation structure 1000 for the battery as described in either Embodiment 1 or Embodiment 2. The housing (not shown) has a receiving cavity, within which both the cooling and heat insulation structure 1000 and the individual battery cells 2000 are disposed, and the cooling and heat insulation structure 1000 is positioned between adjacent individual battery cells 200. Details regarding the cooling and heat insulation structure 1000 can be found in Embodiment 1 or Embodiment 2, and will not be elaborated upon here.

[0053] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

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

[0057] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A cooling and heat insulation structure for a battery pack, characterized in that, The cooling and heat insulation structure includes: The encapsulation housing (100) is configured to have an enclosed receiving space (110) inside. A phase change material (200) is disposed within the accommodating space (110); A support member (300) is disposed within the accommodating space (110) and divides the accommodating space (110) into multiple sub-accommodating spaces (111), each of which contains the phase change material (200). A thermal insulation layer (400) is disposed between the phase change material (200) and the support member (300).

2. The cooling and heat insulation structure for a battery pack according to claim 1, characterized in that, The thermal insulation material layer (400) is coated on the surface of the support member (300) facing the phase change material (200); Alternatively, the insulation material layer (400) may include an insulation carrier and an insulation material coated on the insulation carrier.

3. The cooling and heat insulation structure for a battery pack according to claim 1 or 2, characterized in that, The support member is one of a cross structure, an I-beam structure, or multiple connected cross structures.

4. The cooling and heat insulation structure for a battery pack according to claim 1 or 2, characterized in that, The support member (300) is integrally formed with the encapsulation shell (100).

5. The cooling and heat insulation structure for a battery pack according to claim 1 or 2, characterized in that, The encapsulation housing (100) includes a body (120) and a cover (130), the body (120) forming the receiving space (110), and the cover (130) covering the opening of the body (120) to close the receiving space (110).

6. The cooling and heat insulation structure for a battery pack according to claim 5, characterized in that, The cover (130) has a through hole (131) configured to inject the phase change material (200) into the receiving space (110).

7. The cooling and heat insulation structure for a battery pack according to claim 6, characterized in that, The cooling and heat insulation structure also includes: A seal (500) is disposed in the through hole (131) to seal the through hole (131).

8. The cooling and heat insulation structure for a battery pack according to claim 5, characterized in that, The cooling and heat insulation structure also includes a frame (600) which surrounds the encapsulation housing (100) and the width of the frame (600) is greater than or equal to the thickness of the encapsulation housing (100).

9. The cooling and heat insulation structure for a battery pack according to claim 1 or 2, characterized in that, The cooling and heat insulation structure also includes: A thermally conductive structure (700) is disposed on the side of the encapsulation housing (100) away from the receiving space (110), and the thermally conductive structure (700) includes a thermally conductive substrate and a thermally conductive material disposed on the surface of the thermally conductive substrate.

10. A battery pack, characterized in that, include: The housing has a receiving cavity; A battery cell, wherein the battery cell is located in the accommodating cavity; The cooling and heat insulation structure for a battery pack as described in any one of claims 1 to 9, wherein the cooling and heat insulation structure is provided between two adjacent battery cells.

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