Thermal insulation, battery pack and vehicle

Abstract

This application provides a heat insulation component, a battery pack, and a vehicle. The heat insulation component includes a first heat insulation pad and a U-shaped frame. The first heat insulation pad is absorbent. The U-shaped frame is disposed on at least one side of the first heat insulation pad along its thickness direction and is connected to the first heat insulation pad for supporting and fixing the first heat insulation pad. In the event of thermal runaway of a battery cell, the cooling medium inside the liquid cooling plate flows out. The first heat insulation pad can absorb the cooling medium flowing out of the liquid cooling plate, allowing the cooling medium to quickly spread to the entire surface of the first heat insulation pad. Thus, the first heat insulation pad can effectively cool and reduce the temperature of a large area of ​​two adjacent battery cells, effectively controlling the spread of thermal runaway.

Description

Technical Field

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

[0002] Thermal insulation is an important component used in battery packs. It is usually placed between the large surfaces of adjacent cells to prevent heat conduction between cells, improve the temperature uniformity of multiple cells, and to a certain extent suppress the damage caused by high temperature to the cells, thereby optimizing the energy efficiency of the cells and extending their service life.

[0003] However, in the existing technology, the function of the thermal insulation component is limited. If the battery cell operates in a high-temperature environment for a long time and thermal runaway occurs, the thermal insulation component cannot provide timely cooling and temperature reduction for the thermal runaway battery cell, which is not conducive to controlling the spread of thermal runaway. Summary of the Invention

[0004] In view of this, this application provides a heat insulation component, a battery pack, and a vehicle to at least solve the problem in the prior art that the heat insulation component cannot provide timely cooling for the thermally runaway battery cell in the event of thermal runaway.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] This application provides a heat insulation component, which includes: a first heat insulation pad and a U-shaped frame; the first heat insulation pad is absorbent, and the U-shaped frame is disposed on at least one side of the first heat insulation pad along its thickness direction, the U-shaped frame being connected to the first heat insulation pad for supporting and fixing the first heat insulation pad.

[0007] Optionally, the surface of the first thermal insulation pad is covered with an encapsulation film, the melting point of which is lower than the thermal runaway temperature of the battery cell.

[0008] Optionally, the heat insulation component further includes: a second heat insulation pad; the first heat insulation pad is disposed on at least one side of the second heat insulation pad along its thickness direction, and the U-shaped frame is disposed between the first heat insulation pad and the second heat insulation pad, and is connected to the first heat insulation pad and the second heat insulation pad respectively; or, the first heat insulation pad is disposed on at least one side of the second heat insulation pad along its thickness direction and is connected to the second heat insulation pad; the U-shaped frame is disposed on the side of the first heat insulation pad opposite to the second heat insulation pad and is connected to the first heat insulation pad.

[0009] Optionally, the first heat insulation pad is disposed on opposite sides of the second heat insulation pad along its thickness direction, and there are two loop frames. The two loop frames are respectively disposed between the corresponding first heat insulation pad and the second heat insulation pad, and are respectively connected to the corresponding first heat insulation pad and the second heat insulation pad.

[0010] Optionally, the first heat insulation pad is at least one of the following: a water-absorbing resin pad, a fluff pulp pad, a water-absorbing silicone pad, a foam pad, a hydrophilic aerogel pad, and a fiber needle-punched felt.

[0011] Optionally, the second heat insulation pad is at least one of a glass fiber pad, a ceramic fiber layer pad, and an aerogel pad.

[0012] Optionally, the encapsulation film is a polyethylene film or a polyethylene terephthalate film.

[0013] Optionally, the thickness of the first heat insulation pad does not exceed 6 mm, and / or the thickness of the U-shaped frame does not exceed 3 mm.

[0014] This application also provides a battery pack including a plurality of battery cells and a heat insulation element as described in any of the preceding claims, the heat insulation element being disposed between two adjacent battery cells, and the surface of a first heat insulation pad and / or the U-shaped frame abutting against the surface of the battery cell.

[0015] This application also provides a vehicle including the battery pack as described above.

[0016] Compared to existing technologies, the heat insulation component, battery pack, and vehicle described in this application have the following advantages:

[0017] The thermal insulation component of this application includes a first thermal insulation pad and a U-shaped frame. The first thermal insulation pad is absorbent, and the U-shaped frame is disposed on at least one side of the first thermal insulation pad along its thickness direction and connected to the first thermal insulation pad for supporting and fixing the first thermal insulation pad. In the event of thermal runaway of the battery cell, the cooling medium inside the liquid cooling plate flows out. The first thermal insulation pad can absorb the cooling medium flowing out of the liquid cooling plate, allowing the cooling medium to quickly spread to the entire surface of the first thermal insulation pad. Thus, the first thermal insulation pad can effectively cool and reduce the temperature of the large surface area of ​​two adjacent battery cells, effectively controlling the spread of thermal runaway.

[0018] The battery pack and vehicle of this application have the same or similar advantages over the prior art and the aforementioned heat insulation components, which will not be elaborated here. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of a heat insulation component according to an embodiment of this application;

[0021] Figure 2 yes Figure 1 Exploded view of the structure;

[0022] Figure 3This is an exploded view of the structure of a first heat insulation pad and an encapsulation film in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of another heat insulation component in an embodiment of this application;

[0024] Figure 5 yes Figure 4 Exploded view of the structure.

[0025] Explanation of reference numerals in the attached figures:

[0026] 01-Insulation component, 1-First insulation pad, 2-U-shaped frame, 3-Encapsulation film, 4-Second insulation pad. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The terms "comprising," "including," or any other variations thereof used in the specification and claims of this application are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0030] The following detailed description of a heat insulation component, battery pack, and vehicle provided in this application is illustrated with specific embodiments.

[0031] This application provides a heat insulation component 01. Figure 1This is a schematic diagram of a heat insulation component 01 in an embodiment of this application. Figure 2 yes Figure 1 Exploded structural diagram, refer to Figure 1 and Figure 2 As shown, the heat insulation component 01 includes: a first heat insulation pad 1 and a U-shaped frame 2; the first heat insulation pad 1 is absorbent, and the U-shaped frame 2 is disposed on at least one side of the first heat insulation pad 1 along its thickness direction. The U-shaped frame 2 is connected to the first heat insulation pad 1 and is used to support and fix the first heat insulation pad 1.

[0032] Specifically, the thermal insulation component 01 is an important part of the battery pack, located between the large surfaces of adjacent cells. Its main functions are as follows: The thermal insulation component 01 provides thermal insulation between adjacent cells. In the event of thermal runaway in a single cell, it helps prevent the rapid spread of high temperatures to surrounding cells, thus preventing fires and explosions within the battery pack. The thermal insulation component 01 also possesses a certain degree of elasticity and cushioning, absorbing volume changes generated during charging and discharging to reduce friction between cells. Furthermore, the thermal insulation component 01 provides a degree of electrical insulation, preventing short circuits caused by contact between adjacent cells. Finally, the thermal insulation component 01 enhances the overall structural stability of the battery pack, giving it better resistance to external impacts and vibrations.

[0033] The battery pack also includes a liquid cooling plate, a key component for thermal management of the battery cells. The liquid cooling plate is typically located on the side wall of the cell and abuts against it. In the case of a cuboid cell, the liquid cooling plate is nearly perpendicular to the heat insulation component 01. The liquid cooling plate contains a circulating cooling medium. This medium carries away the heat generated by the cell during operation, thus cooling the cell and preventing thermal runaway. The cooling medium can be pure water or a mixture of water and ethylene glycol; the specific type is not limited in this embodiment.

[0034] However, with long-term use of the battery pack, the cooling performance of the liquid cooling plate may decrease, and the battery cell may still experience thermal runaway. The high temperature of a thermally runaway battery cell can cause partial melting of the liquid cooling plate, leading to the leakage of the cooling medium. However, in existing technologies, the thermal insulation component 01 has a limited function. If a battery cell operates under high temperatures for an extended period and thermal runaway occurs, the thermal insulation component 01 cannot provide timely cooling and effectively control the spread of thermal runaway. In this embodiment, the thermal insulation component 01 includes a first thermal insulation pad 1 and a U-shaped frame 2. The first thermal insulation pad 1 is made of a material with low thermal conductivity and good insulation and heat resistance to ensure effective thermal insulation and electrical insulation between adjacent battery cells under normal operating conditions. Simultaneously, the first thermal insulation pad 1 is absorbent, preventing water absorption in the event of thermal runaway or leakage of the cooling medium from the liquid cooling plate. The first heat insulation pad 1 can absorb the cooling medium flowing out of the liquid cooling plate. When in partial contact with the cooling medium, it can overcome gravity and quickly absorb the medium. For example, initially, the liquid level of the cooling medium is 10% of the height of the first heat insulation pad 1. Within 30 seconds, the first heat insulation pad 1 can absorb the cooling medium to reach 50% of its own height. As time continues, the first heat insulation pad 1 can absorb the cooling medium to reach 100% of its own height. The height of the first heat insulation pad 1 is approximately the same as the height of the battery cell to ensure good heat insulation during normal battery cell operation. Of course, the above values ​​are only an example; in actual applications, the water absorption capacity of each first heat insulation pad 1 may vary, resulting in different water absorption ratios and different times for water absorption. Before the cooling medium completely boils and vaporizes, the first heat insulation pad 1 can ensure its maximum temperature does not exceed 100℃, playing a phase change insulation role. As long as sufficient moisture is ensured, the surface temperature of adjacent battery cells can be effectively reduced, thereby effectively controlling the spread of thermal runaway.

[0035] Taking pure water as a cooling medium as an example, pure water is a good phase change material. When the temperature of water rises to 100℃, the temperature will not rise further. It undergoes phase change by heating up and boiling to vaporize. Therefore, in the event of thermal runaway of the battery cell, taking the first heat insulation pad 1 with a height of 95mm, a length of 205mm, and a thickness of about 3.6mm as an example, if its volume water absorption rate can reach 78%, the water absorption can reach 50g. Under normal temperature and pressure, the specific heat capacity of liquid water is about 4.2KJ / (kg·℃). Under standard atmospheric pressure, the vaporization specific heat capacity (heat of vaporization) of liquid water at 100℃ is about 2260KJ / kg. Therefore, the total amount of heat that 50g of water can absorb when it rises from an initial temperature of 50℃ to 100℃ and boils is approximately as follows:

[0036] Temperature rise heat absorption: 4.2 KJ / (kg·℃) × 0.05 Kg × 50℃ = 10.5 kJ;

[0037] Boiling heat absorption: 2260 KJ / kg × 0.05 Kg = 113 kJ;

[0038] Total heat absorption: 10.5 kJ + 113 kJ = 123.5 kJ;

[0039] Assume the specific heat capacity of the battery cell is 1 KJ / (kg·℃) and the mass is 2.3 kg, then the temperature of the battery cell can be reduced by approximately: 123.5 kJ ÷ 1 KJ / (kg·℃) ÷ 2.3 kg = 53.7℃.

[0040] Thus, it can be seen that the first heat insulation pad 1 can effectively reduce the temperature of the battery cell in the case of thermal runaway of the battery cell, thereby effectively controlling the spread of thermal runaway.

[0041] The loop-shaped frame 2 has a rectangular or square structure, and its shape structure is similar to a loop shape or a square shape. The loop-shaped frame 2 is provided on at least one side of the first heat insulation pad 1 along its thickness direction. That is, the loop-shaped frame 2 can be provided on one side of the first heat insulation pad 1 along its thickness direction to provide unilateral support for the first heat insulation pad 1, or the loop-shaped frame 2 can also be provided on both sides of the first heat insulation pad 1 along its thickness direction to provide bilateral support for the first heat insulation pad 1. Figure 1 and Figure 2 In the heat insulation member 01 shown, the loop-shaped frame 2 is provided on both sides of the first heat insulation pad 1 along its thickness direction to provide bilateral support for the first heat insulation pad 1. The loop-shaped frame 2 is connected to the first heat insulation pad 1, and they can be connected together by means such as adhesive connection or crimping. The loop-shaped frame 2 is used to support and fix the first heat insulation pad 1 to reduce the risk of deformation and collapse of the first heat insulation pad 1 between adjacent two battery cells, improve the stability of the first heat insulation pad 1, and ensure the water absorption capacity of the first heat insulation pad 1. Among them, the loop-shaped frame 2 should also be made of a material with a low thermal conductivity and certain insulation performance, such as ceramic fiber material, etc., to ensure the heat insulation ability of the heat insulation member 01 and prevent short circuit caused by contact between adjacent two battery cells.

[0042] In addition, since the battery cell expands during operation, the central part of the large surface of the battery cell is prone to protrusion, and the surface of the loop-shaped frame 2 abuts against the edge of the large surface of the battery cell. Since the loop-shaped frame 2 has a certain thickness, the loop-shaped frame 2 can provide a certain expansion space for the large surface of the battery cell, reduce the stress on the battery cell, and thus is beneficial to improving the situation of thermal runaway of the battery cell.

[0043] Therefore, the thermal insulation component 01 in this embodiment includes a first thermal insulation pad 1 and a U-shaped frame 2. The first thermal insulation pad 1 is absorbent, and the U-shaped frame 2 is disposed on at least one side of the first thermal insulation pad 1 along its thickness direction and connected to the first thermal insulation pad 1 for supporting and fixing the first thermal insulation pad 1. In the event of thermal runaway of the battery cell, the cooling medium in the liquid cooling plate flows out. The first thermal insulation pad 1 can absorb the cooling medium flowing out of the liquid cooling plate, allowing the cooling medium to quickly spread to the entire surface of the first thermal insulation pad 1. Thus, the first thermal insulation pad 1 can effectively cool and reduce the temperature of the large surface area of ​​two adjacent battery cells, effectively controlling the spread of thermal runaway.

[0044] Optionally, in some embodiments of this application, the first heat insulation pad 1 can be at least one of the following: water-absorbing resin pad, fluff pulp pad, water-absorbing silicone pad, foam pad, hydrophilic aerogel pad, and fiber needle-punched felt, or any combination of the above materials. The material forming the first heat insulation pad 1 needs to have strong capillary water absorption, so that it can overcome gravity and absorb the cooling medium in a short time when it is in partial contact with the cooling medium. Hygroscopic resins are polymeric compounds with many hydrophilic groups, capable of absorbing hundreds or even thousands of times their own weight in water. Fluff pulp is a specially treated wood pulp fiber with long, loose fibers. Silica gel's main component is silica gel, which contains many tiny pores that can adsorb water molecules. Foam pads are porous materials, usually made of plastics, and their absorbency depends primarily on their porous structure and the material's inherent hydrophilicity. Hydrophilic aerogels have a porous structure that can adsorb large amounts of water; their hydrophilicity is determined by the chemical groups on the material's surface, which can interact with water molecules. Fiber needle-punched felt is made from fibers through a needle-punching process, with the fibers interwoven. Its absorbency depends on the type of fiber and the felt's density.

[0045] Optionally, Figure 3 This is an exploded view of the structure of a first heat insulation pad 1 and an encapsulation film 3 in an embodiment of this application, with reference to... Figure 3As shown, in some embodiments of this application, the surface of the first heat insulation pad 1 is covered with an encapsulation film 3. The encapsulation film 3 can prevent the core material in the first heat insulation pad 1 from scattering and falling into the battery pack, affecting the working performance of the battery cell. It should be noted that the encapsulation film 3 needs to be made of a low-temperature material, so that the melting point of the encapsulation film 3 is lower than the thermal runaway temperature of the battery cell, so that the encapsulation film 3 can be melted when the battery cell experiences thermal runaway, exposing the first heat insulation pad 1, thereby allowing the first heat insulation pad 1 to contact the cooling medium and absorb the cooling medium. In some embodiments, the encapsulation film 3 can be made of polyethylene (PE) film or polyethylene terephthalate (PET) film, both of which have good heat resistance, flexibility, and chemical corrosion resistance, and can play a stable and reliable role in covering the first heat insulation pad 1 when the battery cell is working normally. In addition, in this embodiment, the thickness of the encapsulation film is set to no more than 0.05 mm to avoid the encapsulation film 3 being too thick, making it difficult to melt in the event of thermal runaway of the battery cell, which would affect the process of the first heat insulation pad 1 absorbing the cooling medium.

[0046] Optionally, Figure 4 This is a schematic diagram of another heat insulation component 01 in the embodiments of this application. Figure 5 yes Figure 4 Exploded structural diagram, refer to Figure 4 and Figure 5 As shown, in some embodiments of this application, the heat insulation component 01 further includes: a second heat insulation pad 4; a first heat insulation pad 1 is disposed on at least one side of the second heat insulation pad 4 along its thickness direction, and a U-shaped frame 2 is disposed between the first heat insulation pad 1 and the second heat insulation pad 4, and is respectively connected to the first heat insulation pad 1 and the second heat insulation pad 4.

[0047] Specifically, the second heat insulation pad 4 can also be made of a material with low thermal conductivity and good insulation and heat resistance to ensure that the second heat insulation pad 4 can effectively insulate the cells and provide electrical insulation between adjacent cells under normal operating conditions. For example, the second heat insulation pad 4 can be made of at least one of glass fiber pads, ceramic fiber layer pads, and aerogel pads. All of these materials have low thermal conductivity and good insulation properties, which can provide good heat insulation between adjacent cells.

[0048] The first heat insulation pad 1 can be disposed on one or both sides of the second heat insulation pad 4 along its thickness direction. When the first heat insulation pad 1 is disposed on one side of the second heat insulation pad 4 along its thickness direction, the first heat insulation pad 1 and the second heat insulation pad 4 respectively abut against the surface of the battery cell. When the first heat insulation pad 1 is disposed on both sides of the second heat insulation pad 4 along its thickness direction, since the first heat insulation pad 1 needs to be placed on the outermost side of the heat insulation component 01 to absorb the cooling medium in the event of thermal runaway of the battery cell, it is necessary to place the first heat insulation pad 1 on the outside of the second heat insulation pad 4. A U-shaped frame 2 is disposed between the first heat insulation pad 1 and the second heat insulation pad 4, and the U-shaped frame 2 is bonded to the first heat insulation pad 1 and the second heat insulation pad 4 respectively, thereby realizing the support and fixation of the first heat insulation pad 1 and the second heat insulation pad 4.

[0049] Alternatively, in some embodiments of this application, the first heat insulation pad 1 of the heat insulation component 01 is disposed on at least one side of the second heat insulation pad 4 along its thickness direction and is connected to the second heat insulation pad 4; the U-shaped frame 2 is disposed on the side of the first heat insulation pad 1 away from the second heat insulation pad 4 and is connected to the first heat insulation pad 1.

[0050] Similarly, the first heat insulation pad 1 can be disposed on one or both sides of the second heat insulation pad 4 along its thickness direction. When the first heat insulation pad 1 is disposed on both sides of the second heat insulation pad 4 along its thickness direction, since the first heat insulation pad 1 needs to be placed on the outermost side of the heat insulation component 01 to absorb the cooling medium in the event of thermal runaway of the battery cell, it is necessary to still place the first heat insulation pad 1 on the outside of the second heat insulation pad 4. The first heat insulation pad 1 and the second heat insulation pad 4 can be pre-bonded or pressed together to form a complete heat insulation core. The U-shaped frame 2 is disposed on the side of the first heat insulation pad 1 away from the second heat insulation pad 4, that is, on the outermost side of the heat insulation component 01. The U-shaped frame 2 is bonded or pressed together with the first heat insulation pad 1, thereby achieving support and fixation of the first heat insulation pad 1. The heat insulation component 01 formed in the above manner includes five layers, in the following order: U-shaped frame 2, first heat insulation pad 1, second heat insulation pad 4, first heat insulation pad 1, and U-shaped frame 2. Optionally, refer to... Figure 5 As shown, in some embodiments of this application, the first heat insulation pad 1 is disposed on opposite sides of the second heat insulation pad 4 along its thickness direction. There are two U-shaped frames 2, each disposed between a corresponding first heat insulation pad 1 and a corresponding second heat insulation pad 4, and connected to the corresponding first heat insulation pad 1 and second heat insulation pad 4. The heat insulation component 01 formed in the above manner comprises five layers, in the following order: first heat insulation pad 1, U-shaped frame 2, second heat insulation pad 4, U-shaped frame 2, and first heat insulation pad 1. In this structure, the U-shaped frame 2 does not obstruct the first heat insulation pad 1 and does not affect its water absorption capacity, thus helping to ensure good water absorption of the first heat insulation pad 1 and achieving effective cooling.

[0051] Optionally, in some embodiments of this application, since the distance between the large surfaces of two adjacent battery cells may be 10mm to 15mm, based on this condition, if the heat insulation component 01 is composed of a first heat insulation pad 1 and a U-shaped frame 2, the thickness of the first heat insulation pad 1 can be set to no more than 6mm. For example, the thickness of the first heat insulation pad 1 can be set to 1mm, 2mm, 3mm, 4mm, 5mm, etc. The thicker the first heat insulation pad 1 is, the stronger its ability to adsorb the cooling medium, but the larger the space occupied between adjacent battery cells. The thinner the first heat insulation pad 1 is, the weaker its ability to adsorb the cooling medium, but the smaller the space occupied between adjacent battery cells.

[0052] Alternatively, in some embodiments of this application, the thickness of the U-shaped frame 2 is set to no more than 3mm. For example, the thickness of the U-shaped frame 2 can be set to 1mm, 2mm, 3mm, etc. The thicker the U-shaped frame 2, the better the support effect on the first heat insulation pad 1, but the larger the space occupied between adjacent cells. The thinner the first heat insulation pad 1, the weaker the support effect on the first heat insulation pad 1, but the smaller the space occupied between adjacent cells.

[0053] Of course, in some preferred embodiments of this application, the thickness of the first heat insulation pad 1 can be set to no more than 6 mm and the thickness of the U-shaped frame 2 to no more than 3 mm, so that the overall thickness of the heat insulation component 01 meets the spacing requirements between the large surfaces of two adjacent battery cells, while also enabling the first heat insulation pad 1 to have a good ability to adsorb cooling medium and enabling the U-shaped frame 2 to have a stable support effect on the first heat insulation pad 1.

[0054] Alternatively, in some other embodiments of this application, if the heat insulation component 01 is composed of a first heat insulation pad 1, a second heat insulation pad 4, and a U-shaped frame 2, the thickness of the second heat insulation pad 4 can be set to be slightly greater than the thickness of the first heat insulation pad 1 to improve the stability of the heat insulation component 01. For example, the thickness of the first heat insulation pad 1 and the U-shaped frame 2 can be set to be no more than 3 mm, and the thickness of the second heat insulation pad 4 can be set to be no more than 5 mm, so that the overall thickness of the heat insulation component 01 meets the spacing requirements between the large surfaces of two adjacent battery cells.

[0055] This application embodiment also provides a battery pack, which includes multiple battery cells and a heat insulation component 01. The heat insulation component 01 is disposed between two adjacent battery cells, and the surfaces of the first heat insulation pad 1 and / or the U-shaped frame 2 abut against the surface of the battery cell. Specifically, multiple battery cells are connected in series or in parallel to form a battery cell group, and the heat insulation component 01 is disposed between two adjacent battery cells. If the heat insulation component 01 includes one first heat insulation pad 1 and one U-shaped frame 2, the surfaces of the first heat insulation pad 1 and the U-shaped frame 2 abut against the surface of the battery cell, respectively. If the heat insulation component 01 includes one first heat insulation pad 1 and two U-shaped frames 2, the U-shaped frames 2 are disposed on both sides of the first heat insulation pad 1 along its thickness direction, and the surfaces of the U-shaped frames 2 abut against the surface of the battery cell. If the heat insulation component 01 includes two first heat insulation pads 1 and one U-shaped frame 2, the U-shaped frame 2 is disposed between the two first heat insulation pads 1, and the surface of the first heat insulation pad 1 abuts against the surface of the battery cell. In addition, the dimensions of the first heat insulation pad 1 and the U-shaped frame 2 are approximately the same as the dimensions of the large surface of the battery cell. The heat insulation component 01 is as described in any of the aforementioned embodiments. In the event of thermal runaway of the battery cell, the cooling medium in the liquid cooling plate flows out. The first heat insulation pad 1 can absorb the cooling medium flowing out of the liquid cooling plate, so that the cooling medium can quickly spread to the entire surface of the first heat insulation pad 1. Thus, the first heat insulation pad 1 can effectively cool and reduce the temperature of the large surface of two adjacent battery cells, effectively control the spread of thermal runaway, and help improve the safety of the battery pack.

[0056] This application also provides a vehicle, which can be a pure electric vehicle or a hybrid vehicle. The vehicle includes a battery pack as described in the foregoing embodiments. The battery pack has high safety performance, thereby helping to improve the safety performance of the vehicle.

[0057] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat insulation component, characterized in that, The heat insulation component includes: a first heat insulation pad (1) and a U-shaped frame (2); The first heat insulation pad (1) is absorbent, and the U-shaped frame (2) is disposed on at least one side of the first heat insulation pad (1) along its thickness direction. The U-shaped frame (2) is connected to the first heat insulation pad (1) and is used to support and fix the first heat insulation pad (1).

2. The heat insulation component according to claim 1, characterized in that, The surface of the first heat insulation pad (1) is covered with an encapsulation film (3), the melting point of which is lower than the thermal runaway temperature of the battery cell.

3. The heat insulation component according to claim 1 or 2, characterized in that, The heat insulation component further includes: a second heat insulation pad (4); The first heat insulation pad (1) is disposed on at least one side of the second heat insulation pad (4) along its thickness direction, and the U-shaped frame (2) is disposed between the first heat insulation pad (1) and the second heat insulation pad (4), and is connected to the first heat insulation pad (1) and the second heat insulation pad (4) respectively. Alternatively, the first heat insulation pad (1) is disposed on at least one side of the second heat insulation pad (4) along its thickness direction, and the U-shaped frame (2) is disposed on the side of the first heat insulation pad (1) away from the second heat insulation pad (4) and connected to the first heat insulation pad (1).

4. The heat insulation component according to claim 3, characterized in that, The first heat insulation pad (1) is disposed on opposite sides of the second heat insulation pad (4) along its thickness direction. There are two loop frames (2). The two loop frames (2) are respectively disposed between the corresponding first heat insulation pad (1) and the second heat insulation pad (4), and are respectively connected to the corresponding first heat insulation pad (1) and the second heat insulation pad (4).

5. The heat insulation member according to any one of claims 1 to 4, characterized in that, The first heat insulation pad (1) is at least one of the following: water-absorbing resin pad, fluff pulp pad, water-absorbing silicone pad, foam pad, hydrophilic aerogel pad, and fiber needle-punched felt.

6. The heat insulation component according to claim 3 or 4, characterized in that, The second heat insulation pad (4) is at least one of glass fiber pad, ceramic fiber layer pad, and aerogel pad.

7. The heat insulation component according to claim 2, characterized in that, The encapsulation film (3) is a polyethylene film or a polyethylene terephthalate film.

8. The heat insulation member according to any one of claims 1 to 7, characterized in that, The thickness of the first heat insulation pad (1) is no more than 6 mm, and / or the thickness of the U-shaped frame (2) is no more than 3 mm.

9. A battery pack, characterized in that, It includes multiple battery cells and a heat insulation element as described in any one of claims 1 to 8, wherein the heat insulation element is disposed between two adjacent battery cells, and the surface of the first heat insulation pad (1) and / or the U-shaped frame (2) abuts against the surface of the battery cell.

10. A vehicle, characterized in that, Includes the battery pack as described in claim 9.

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