Battery cell thermal insulation frame, battery cell thermal insulation structure, battery module, battery pack and vehicle

Abstract

The utility model belongs to vehicle technical field discloses electric core heat insulation frame, electric core heat insulation structure, battery module, battery pack and vehicle. Among them, the electric core heat insulation frame includes frame body and organ pipe, organ pipe is connected with frame body and is enclosed with frame body and forms heat insulation hole, heat insulation hole extends along the thickness direction of frame body, and the pipeline of organ pipe communicates with heat insulation hole. The electric core heat insulation frame is simple in structure, can effectively save the manufacturing cost, and can effectively improve the effect and efficiency of managing electric core thermal runaway on the basis of not increasing the volume of electric core heat insulation frame.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to cell heat insulation frame, cell heat insulation structure, battery module, battery pack and vehicle. Background Technology

[0002] When a single battery cell experiences thermal runaway due to internal defects and / or damage from external structures, its temperature rises sharply, and it rapidly releases high-temperature flammable gases and / or liquids and / or solid ejecta, which can ignite adjacent single battery cells. To address this phenomenon, related technologies typically employ cell insulation structures to separate adjacent single battery cells, thereby reducing the risk of a single cell igniting other single battery cells when it experiences thermal runaway due to internal defects and / or damage from external structures.

[0003] For cell insulation structures made of U-shaped frames, solid silicone, foamed silicone, or foam are usually used to make the U-shaped frame into a solid frame. After the U-shaped frame is assembled between two adjacent individual cells, it is usually in a state of compression. Therefore, the U-shaped frame and the individual cell are basically in close contact, which means that the effect of managing cell thermal runaway through the U-shaped frame needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to provide a cell heat insulation frame, a cell heat insulation structure, a battery module, a battery pack, and a vehicle to solve the above-mentioned problems existing in the cell heat insulation structure in related technologies.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Cell insulation frame, including:

[0007] Framework body;

[0008] The bellows tube is connected to the frame body and surrounds the frame body to form a heat insulation hole. The heat insulation hole extends along the thickness direction of the frame body, and the pipe of the bellows tube communicates with the heat insulation hole.

[0009] As an alternative to the aforementioned cell insulation frame, the bellows tube is located at the top of the frame body.

[0010] As an alternative to the aforementioned cell insulation frame, the extension direction of the bellows tube is perpendicular to the thickness direction of the frame body.

[0011] As an alternative to the aforementioned cell insulation frame, the frame body is sandwiched between two individual cells along the thickness direction of the frame body, and the bellows tube is located between the two ends of the frame body.

[0012] As an alternative to the aforementioned cell heat insulation frame, the cell heat insulation frame further includes an encapsulation layer, which connects the bellows tube to the frame body.

[0013] As an optional embodiment of the aforementioned cell heat insulation frame, the encapsulation layer is provided on at least one side of the frame body along the thickness direction; and / or,

[0014] The encapsulation layer seals the end of the heat insulation hole.

[0015] As an alternative to the aforementioned cell heat insulation frame, the encapsulation layer is made of a polymer material, the melting point or thermal decomposition temperature of which is greater than or equal to 100°C and less than the minimum thermal runaway temperature of a single cell.

[0016] The cell insulation structure includes the aforementioned cell insulation frame.

[0017] As an optional solution to the above-mentioned cell heat insulation structure, the cell heat insulation structure further includes a heat insulation component disposed within the heat insulation hole.

[0018] As an optional solution for the above-mentioned cell heat insulation structure, the maximum dimension of the heat insulation component along the thickness direction of the frame body is less than the minimum dimension of the heat insulation hole along the thickness direction of the frame body after the frame body is sandwiched between two adjacent individual cells.

[0019] As an optional solution for the above-mentioned cell heat insulation structure, the frame body is provided with encapsulation layers on both sides along its own thickness direction. The encapsulation layers connect the bellows tube to the frame body, and the two encapsulation layers seal the two ends of the heat insulation hole one by one to form a heat insulation space. The heat insulation component is located in the heat insulation space.

[0020] As an alternative to the above-mentioned cell heat insulation structure, the heat insulation component includes a liquid-absorbing part, which is made of a liquid-absorbing material.

[0021] The battery module includes the aforementioned cell heat insulation frame, or includes the aforementioned cell heat insulation structure.

[0022] The battery pack includes the aforementioned cell heat insulation frame, or the aforementioned cell heat insulation structure, or the aforementioned battery module.

[0023] The vehicle includes the aforementioned cell heat insulation frame, or the aforementioned cell heat insulation structure, or the aforementioned battery module, or the aforementioned battery pack.

[0024] The beneficial effects of this utility model are:

[0025] This utility model provides a cell heat insulation frame, a cell heat insulation structure, a battery module, a battery pack, and a vehicle. The cell heat insulation frame includes a frame body and a bellows tube. The bellows tube is connected to the frame body and encloses the frame body to form a heat insulation hole. The heat insulation hole extends along the thickness direction of the frame body, and the bellows tube communicates with the heat insulation hole.

[0026] After the cell insulation frame is sandwiched between two adjacent individual cells, it can both position the relative positions of the two adjacent individual cells and provide insulation. By setting up a bellows tube connected to the frame body and forming an insulation hole around the frame body, and the pipe of the bellows tube is connected to the insulation hole, when either of the two individual cells on both sides of the thickness direction of the frame body experiences thermal runaway, coolant is supplied into the pipe of the bellows tube. The coolant flows from the pipe of the bellows tube into the insulation hole and comes into contact with the individual cell. The coolant vaporizes upon heating and absorbs heat, which allows for active cooling of the individual cell while further preventing the spread of thermal runaway. Therefore, compared with existing technologies, it can effectively improve the effect and efficiency of managing cell thermal runaway.

[0027] Secondly, by setting a portion of the cell heat insulation frame directly formed by the accordion tube, the mold for manufacturing the accordion tube for the battery pack is an existing structure and can be directly used for manufacturing. The frame body can also be directly manufactured using existing molds, thereby effectively saving the manufacturing cost of the cell heat insulation frame.

[0028] Therefore, the structure of the cell thermal insulation frame is simple, which can effectively save manufacturing costs, and can effectively improve the effect and efficiency of managing cell thermal runaway without increasing the volume of the cell thermal insulation frame. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the battery cell heat insulation frame provided in a specific embodiment of this utility model;

[0030] Figure 2 This is a front view of the cell heat insulation frame provided in a specific embodiment of this utility model;

[0031] Figure 3 This is a top view of the cell heat insulation frame provided in a specific embodiment of this utility model;

[0032] Figure 4 This is a left view of the cell heat insulation frame provided in a specific embodiment of this utility model;

[0033] Figure 5 This is an exploded view of the cell heat insulation structure provided in a specific embodiment of this utility model;

[0034] Figure 6 This is an exploded view of the battery pack provided in a specific embodiment of this utility model.

[0035] In the picture:

[0036] 1. Framework body;

[0037] 2. Organ tube; 21. Sub-tube section; 211. Liquid cooling port;

[0038] 3. Insulation holes;

[0039] 4. Encapsulation layer;

[0040] 5. Liquid suction section;

[0041] 6. Individual battery cell;

[0042] 7. Double-sided tape;

[0043] 8. Battery box; 81. Box body; 82. Box cover. Detailed Implementation

[0044] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0048] When a single battery cell experiences thermal runaway due to internal defects and / or damage from external structures, its temperature rises sharply, and it rapidly releases high-temperature flammable gases and / or liquids and / or solid ejecta, igniting adjacent single battery cells. To address this, related technologies typically employ cell insulation structures to separate adjacent cells, reducing the risk of ignition when a single cell experiences thermal runaway due to internal defects and / or external structural damage. However, for cell insulation structures using a U-shaped frame, the frame is usually made of solid silicone, foamed silicone, or foam, and is typically compressed when assembled between adjacent cells. Therefore, the U-shaped frame and the cells are in near-close contact, meaning the effectiveness of managing cell thermal runaway using the U-shaped frame needs improvement.

[0049] This utility model provides a cell heat insulation frame, such as Figure 1-5 As shown, the battery cell heat insulation frame includes a frame body 1 and a bellows tube 2. The bellows tube 2 is connected to the frame body 1 and surrounds the frame body 1 to form a heat insulation hole 3. The heat insulation hole 3 extends along the thickness direction of the frame body 1, and the pipe of the bellows tube 2 is connected to the heat insulation hole 3.

[0050] like Figure 6 As shown, taking the example of a cell heat insulation frame sandwiched between two adjacent individual cells 6, the heat insulation frame can both position the relative positions of the two adjacent individual cells 6 and provide heat insulation. Typically, the heat insulation frame is clamped tightly between two adjacent individual cells 6.

[0051] By setting up a bellows pipe 2 connected to the frame body 1 and forming a heat insulation hole 3 around the frame body 1, and setting the pipe of the bellows pipe 2 to communicate with the heat insulation hole 3, when either of the two individual battery cells 6 on both sides of the thickness direction of the frame body 1 experiences thermal runaway, coolant is supplied to the pipe of the bellows pipe 2. The coolant flows from the pipe of the bellows pipe 2 into the heat insulation hole 3 and comes into contact with the individual battery cell 6. The coolant is heated and vaporized to absorb heat, which enables the individual battery cell 6 to be actively cooled while further preventing the spread of thermal runaway. Therefore, compared with the existing technology, it can effectively improve the effect and efficiency of managing the thermal runaway of the battery cell.

[0052] Secondly, by setting a portion of the cell heat insulation frame directly formed by the accordion tube 2, the mold for manufacturing the accordion tube 2 is an existing structure for the battery pack, and can be directly used for manufacturing. The frame body 1 can also be directly manufactured using the existing mold, thereby effectively saving the manufacturing cost of the cell heat insulation frame.

[0053] Therefore, the structure of the cell thermal insulation frame is simple, which can effectively save manufacturing costs, and can effectively improve the effect and efficiency of managing cell thermal runaway without increasing the volume of the cell thermal insulation frame.

[0054] Specifically, such as Figure 1 and Figure 3 As shown, the pipe of the bellows tube 2 is a liquid cooling hole 211, which is a through hole and is connected to the heat insulation hole 3.

[0055] Specifically, for battery packs, the accordion tube 2 is also typically used as a liquid cooling structure for thermal management of the cell modules.

[0056] Specifically, such as Figure 1 and Figure 2 As shown, the heat insulation hole 3 can be either a through hole that penetrates the frame body 1 along the thickness direction of the frame body 1, or a blind hole that does not penetrate the frame body 1 along the thickness direction of the frame body 1.

[0057] Specifically, if no insulation element is installed inside the insulation hole 3, during normal operation of the individual battery cell 6, the air inside the insulation hole 3 forms an air insulation layer, and the frame body 1 and the air insulation layer work together to provide insulation. If an insulation element is installed inside the insulation hole 3, during normal operation of the individual battery cell 6, the insulation element inside the insulation hole 3 and the frame body 1 work together to provide insulation. It is understandable that the decision to install an insulation element inside the insulation hole 3 can be made adaptively based on actual operating conditions.

[0058] Optionally, in this embodiment, the coolant is water. Water can absorb heat when heated to its boiling point, and it can also absorb heat of vaporization when it vaporizes after boiling, thereby further improving the effect and efficiency of active cooling of the individual battery cell 6.

[0059] In other embodiments, the coolant includes water, and also includes at least one of ethanol, ethylene glycol, propylene glycol, etc. The coolant is capable of absorbing heat and preventing freezing.

[0060] Optionally, in this embodiment, as Figure 1 , Figure 2 and Figure 5 As shown, the bellows pipe 2 is located at the top of the frame body 1. It can be understood that the liquid cooling hole 211 is located at the top of the frame body 1 and communicates with the heat insulation hole 3. This arrangement allows the coolant to automatically fall into the heat insulation hole 3 under its own gravity when coolant is supplied to the liquid cooling hole 211, thereby further improving the efficiency of managing cell thermal runaway and reducing energy consumption caused by coolant supply.

[0061] In other embodiments, the organ pipe 2 may also be located between the top and bottom of the frame body 1.

[0062] Optionally, in this embodiment, as Figure 1 , Figure 3 and Figure 5 As shown, the extension direction of the liquid cooling hole 211 is perpendicular to the thickness direction of the frame body 1. This minimizes the axial length of the liquid cooling hole 211, allowing the coolant delivered to the liquid cooling hole 211 to flow quickly and efficiently into the heat insulation hole 3, thereby further improving the efficiency of managing cell thermal runaway. At this time, the axial direction of the liquid cooling hole 211 is parallel to its extension direction.

[0063] In other embodiments, the extension direction of the liquid cooling hole 211 may be not perpendicular to the thickness direction of the frame body 1, or the liquid cooling hole 211 may be a non-straight hole.

[0064] Further optional, such as Figure 1 , Figure 3 and Figure 5 As shown, the number of liquid cooling holes 211 on the bellows tube 2 is at least two, and the at least two liquid cooling holes 211 are distributed at intervals on the bellows tube 2. By simultaneously supplying coolant to the heat insulation hole 3 through at least two liquid cooling holes 211, the efficiency of managing cell thermal runaway can be further improved.

[0065] Further optional, such as Figure 1 , Figure 3 and Figure 5 As shown, at least two liquid cooling holes 211 are evenly distributed on the bellows tube 2. Taking the frame body 1 sandwiched between individual battery cells 6, with the end faces of the two individual battery cells 6 close to each other as the large surface, this arrangement allows for roughly uniform cooling of the large surface of the individual battery cell 6 during thermal runaway, thereby further improving the effect of managing thermal runaway.

[0066] Further optional, such as Figure 1-3 and Figure 5 As shown, the bellows tube 2 includes at least two sub-tube sections 21 connected in sequence, and each sub-tube section 21 is provided with at least one liquid cooling hole 211. This arrangement allows the shape and size of the bellows tube 2 and the total number of liquid cooling holes 211 on the bellows tube 2 to be adjusted according to the shape and size of the individual battery cell 6.

[0067] In this embodiment, as Figure 1 and Figure 3 As shown, an example is an organ tube 2 comprising three sub-tube sections 21, each sub-tube section 21 having eight liquid cooling holes 211 evenly distributed.

[0068] Specifically, the frame body 1 is more deformable than the organ pipe 2. This is to ensure both the structural strength of the organ pipe 2 and the ability of the formed cell insulation frame to be clamped between the two individual cells 6.

[0069] More specifically, the organ pipe 2 is made of rigid materials such as plastic or aluminum to ensure the structural strength of the organ pipe 2.

[0070] More specifically, the frame body 1 is made of elastic materials such as MPP foam, PU foam, rubber, or plastic. This ensures that the frame body 1 can undergo elastic deformation, so that the formed cell heat insulation frame can be clamped between the two individual cells 6. This allows the frame body 1 to not only provide heat insulation but also to position the two individual cells 6 relative to each other.

[0071] It is understandable that when both the organ pipe 2 and the frame body 1 are made of plastic, the frame body 1, made of plastic, is more prone to deformation than the organ pipe 2, which is made of plastic.

[0072] Optionally, in this embodiment, after the frame body 1 is sandwiched between two individual battery cells 6 along the thickness direction of the frame body 1, the bellows tube 2 is located between the two ends of the frame body 1. This is to prevent the relatively stiff bellows tube 2 from damaging or even destroying the adjacent individual battery cells 6. In other embodiments, at least one end of the bellows tube 2 may be arranged approximately flush with the corresponding end on the frame body 1 after the frame body 1 is sandwiched between two individual battery cells 6 along the thickness direction of the frame body 1. This also prevents the relatively stiff bellows tube 2 from damaging or even destroying the adjacent individual battery cells 6.

[0073] Optionally, for the heat insulation component housed within the heat insulation hole 3, the maximum dimension of the heat insulation component along the thickness direction of the frame body 1 is less than the minimum dimension of the heat insulation hole 3 along the thickness direction of the frame body 1 after the frame body 1 is sandwiched between two adjacent individual battery cells 6. This arrangement ensures that the heat insulation component will not damage the individual battery cells 6 during the assembly of the frame body 1, the bellows tube 2, the heat insulation component, and the two individual battery cells 6 into a whole. Furthermore, after assembly, a certain gap exists between the heat insulation component and at least one of the two adjacent individual battery cells 6, and the heat insulation component will not affect the thermal expansion of the individual battery cells 6, thereby effectively improving the safety and reliability of the individual battery cells 6 during normal operation.

[0074] Optionally, in this embodiment, as Figure 1 and Figure 2 As shown, the heat insulation hole 3 penetrates the frame body 1 along the thickness direction of the frame body 1. This arrangement maximizes the size of the heat insulation hole 3 along the thickness direction of the frame body 1, effectively increasing the amount of coolant it can hold, thereby further improving the efficiency and effectiveness of managing cell thermal runaway.

[0075] In other embodiments, the heat insulation hole 3 may also be a blind hole.

[0076] Further, optionally, in this embodiment, as Figure 1 and Figure 2 As shown, for the heat insulation hole 3 penetrating the frame body 1 along the thickness direction of the frame body 1, the maximum dimension of the heat insulation component along the thickness direction of the frame body 1 is less than the minimum dimension of the bellows pipe 2 along the thickness direction of the frame body 1. This further ensures that the heat insulation component will not damage the individual battery cells 6 during the assembly of the frame body 1, bellows pipe 2, heat insulation component, and two individual battery cells 6 into a whole; secondly, it further ensures that after assembly, there is a certain gap between the heat insulation component and at least one of the two adjacent individual battery cells 6, and the heat insulation component will not affect the thermal expansion of the individual battery cells 6, thereby effectively improving the safety and reliability of the individual battery cells 6 during normal operation.

[0077] Optionally, the number of heat insulation holes 3 is at least two, and the at least two heat insulation holes 3 are distributed at intervals. Optionally, the at least two heat insulation holes 3 are evenly distributed on the frame body 1. In this embodiment, as shown... Figure 1 and Figure 2 As shown, an example is provided by setting a heat insulation hole 3.

[0078] Among them, such as Figure 5As shown, the battery cell heat insulation frame also includes an encapsulation layer 4, which connects the bellows tube 2 to the frame body 1. This allows the bellows tube 2 and the frame body 1 to be connected as a whole, and the bellows tube 2 and the frame body 1 enclose a heat insulation hole 3. Specifically, the encapsulation layer 4 is connected to the frame body 1 and the bellows tube 2 by means of adhesive or double-sided adhesive 7, thus achieving the connection between the encapsulation layer 4 and the frame body 1.

[0079] Optionally, such as Figure 5 As shown, an encapsulation layer 4 is provided on at least one side of the frame body 1 along the thickness direction. It can be understood that, along the thickness direction of the frame body 1, the encapsulation layer 4 connects the large surface of the frame body 1 and the large surface of the organ pipe 2, thereby effectively improving the reliability of connecting the frame body 1 and the organ pipe 2 into a whole.

[0080] In other embodiments, the encapsulation layer 4 may be used to connect only the contact points between the frame body 1 and the organ pipe 2.

[0081] In this implementation, such as Figure 5 As shown, in the exemplary configuration, encapsulation layers 4 are provided on both sides of the frame body 1 along the thickness direction. Compared to providing an encapsulation layer 4 only on one side of the frame body 1 in the thickness direction, this can further improve the reliability of connecting the frame body 1 and the organ pipe 2 into a whole.

[0082] Further optional, such as Figure 5 As shown, at least one encapsulation layer 4 and an adjacent single battery cell 6 are connected by means of adhesive or double-sided tape 7, so as to connect the frame body 1, the bellows tube 2, the heat insulation component and the two single battery cells 6 into a whole. In this embodiment, the end faces of the two encapsulation layers 4 corresponding to each other and close to the two single battery cells 6 are connected by double-sided tape 7.

[0083] Optionally, such as Figure 5 As shown, the encapsulation layer 4 seals the end of the heat insulation hole 3. For the heat insulation component placed inside the heat insulation hole 3, when the frame body 1 and the bellows tube 2 are connected as a whole by the encapsulation layer 4, the heat insulation component can be directly encapsulated in the heat insulation hole 3 at the same time, thereby effectively simplifying the structure of the formed cell heat insulation structure and reducing production costs.

[0084] In this embodiment, as Figure 5 As shown, for a heat insulation hole 3 that is a through hole, and two encapsulation layers 4, with the heat insulation component housed within the heat insulation hole 3, when the two encapsulation layers 4 connect the frame body 1 and the bellows pipe 2 into a whole, the two encapsulation layers 4 synchronously and one-to-one seal both ends of the heat insulation hole 3 to form a heat insulation space, within which the heat insulation component is located. This allows the heat insulation component to be completely and synchronously encapsulated within the heat insulation hole 3, directly defining the placement position of the heat insulation component.

[0085] In other embodiments, the encapsulation layer 4 may be configured solely for connecting the frame body 1 and the organ pipe 2.

[0086] Optionally, in this embodiment, as Figure 5 As shown, the thermal insulation component includes a liquid-absorbing part 5, which is made of a liquid-absorbing material. Specifically, the liquid-absorbing part 5 is encapsulated within the thermal insulation space by two encapsulation layers 4. During thermal runaway of the battery cell, coolant is supplied to the thermal insulation hole 3 through the liquid cooling hole 211. The liquid-absorbing part 5 can absorb some of the coolant to further enhance the thermal insulation effect of the thermal insulation component, thereby further improving the effectiveness and efficiency of thermal runaway management.

[0087] Alternatively, in this embodiment, the encapsulation layer 4 is made of a polymer material, the melting point or thermal decomposition temperature of which is greater than or equal to 100°C and less than the minimum thermal runaway temperature of the single cell 6.

[0088] Polymer materials are lightweight, thermoplastic, and thermosetting. Therefore, using polymer materials to make the encapsulation layer 4 can reduce the weight of the heat insulation component and allow the encapsulation layer 4 to undergo a phase change upon heating, becoming molten or softening. Specifically, for encapsulation layer 4 made of a polymer material with a melting point, the encapsulation layer 4 will change from a solid to a molten state upon heating, exposing the liquid-absorbing part 5; for encapsulation layer 4 made of a polymer material capable of thermal decomposition, the encapsulation layer 4 will soften, deform, or even burn upon heating, forming ash accompanied by coke, thus exposing the liquid-absorbing part 5.

[0089] Therefore, when a single cell 6 experiences thermal runaway due to internal defects and / or damage from external structures, the encapsulation layer 4 absorbs heat and undergoes a phase change upon heating. For encapsulation layer 4 made of polymer materials with melting points, it will change from a solid state to a molten state and flow upon heating, exposing the liquid-absorbing part 5. For encapsulation layer 4 made of polymer materials capable of thermal decomposition, it will soften, deform, or even burn upon heating, forming ash with coke, exposing the liquid-absorbing part 5. The liquid-absorbing part 5, which absorbs some coolant, can effectively increase the contact area between the coolant and the single cell 6. Furthermore, the liquid-absorbing part 5 can directly provide thermal insulation, and the coolant on the liquid-absorbing part 5 can vaporize upon heating and absorb heat, thereby further improving the effect and efficiency of managing cell thermal runaway.

[0090] Specifically, the polymer material is polyethylene terephthalate or latex, etc. Melting point refers to the temperature at which a substance changes from a solid state to a molten state. Thermal decomposition temperature refers to the temperature at which a substance changes from a solid state to a soft state or even burns, forming ash accompanied by coke. Phase change refers to the encapsulation layer 4 changing from a solid state to a molten state; or, the encapsulation layer 4 changing from a solid state to a soft state or even burning, forming ash accompanied by coke.

[0091] It is understandable that the minimum thermal runaway temperature of a single battery cell 6 differs for different types and specifications. Therefore, the specific type of polymer material used to fabricate the encapsulation layer 4 is selected based on the minimum thermal runaway temperature of the single battery cell 6.

[0092] In this embodiment, for the encapsulation layer 4 which only connects the frame body 1 and the bellows tube 2, the encapsulation layer 4 is defined as the first encapsulation layer. The thermal insulation component also includes a second encapsulation layer encapsulated outside the liquid-absorbing part 5. The second encapsulation layer is encapsulated on the outer periphery of the liquid-absorbing part 5, and at least the portion of the liquid-absorbing part 5 adjacent to the liquid cooling hole 211 is exposed. In this case, it is preferable that the second encapsulation layer is made of a polymer material, the melting point or thermal decomposition temperature of the polymer material is greater than or equal to 100°C, and less than the minimum thermal runaway temperature of the single cell 6. With this configuration, when managing the thermal runaway of the cell, when the second encapsulation layer undergoes a phase change due to heat, exposing the liquid-absorbing part 5, the liquid-absorbing part 5, which absorbs some coolant, can effectively increase the contact area between the coolant and the single cell 6. Furthermore, the liquid-absorbing part 5, which absorbs coolant, can directly provide thermal insulation, and the coolant on the liquid-absorbing part 5 can vaporize and absorb heat, thereby further improving the effect and efficiency of managing the thermal runaway of the cell. Furthermore, along the thickness direction of the frame body 1, one sidewall of the second encapsulation layer is connected to one of the adjacent end faces of the two individual battery cells 6 by applying adhesive or double-sided tape 7, thereby further improving the reliability of connecting the frame body 1, the bellows tube 2, the heat insulation component, and the two individual battery cells 6 into a whole. The purpose of not connecting both sidewalls of the second encapsulation layer to the adjacent end faces of the two individual battery cells 6 one-to-one along the thickness direction of the frame body 1 is to prevent the two individual battery cells 6 from being damaged or even torn by cold contraction.

[0093] In other embodiments, the insulation element may also be made directly from insulation materials such as aerogel.

[0094] In this embodiment, as Figure 1-6 As shown, the exemplary configuration of the shape of the heat insulation hole 3, the outer contour shape of the overall structure formed by the frame body 1 and the bellows tube 2, and the shape of the heat insulation component are all cuboid, suitable for square-shaped single battery cells 6. In this embodiment, the frame body 1 is a U-shaped frame, and the thickness direction of the frame body 1 is parallel to the thickness direction of the heat insulation component. The shapes of the frame body 1 and the bellows tube 2 can also be adaptively adjusted according to actual operating conditions to suit cylindrical battery cells. It is understood that the shapes of the heat insulation hole 3, the frame body 1, and the bellows tube 2 can all be adaptively adjusted according to the shape of the single battery cell 6.

[0095] This utility model also provides a cell thermal insulation structure, including the aforementioned cell thermal insulation frame. By adopting the aforementioned cell thermal insulation frame, the effect and efficiency of managing cell thermal runaway are effectively improved without increasing the volume and manufacturing cost of the cell thermal insulation frame.

[0096] Optionally, the cell insulation structure also includes the aforementioned insulation components. By employing these insulation components, the effectiveness and efficiency of managing cell thermal runaway can be further improved.

[0097] This utility model also provides a battery module, including the aforementioned cell heat insulation frame, or including the aforementioned cell heat insulation structure. By adopting the aforementioned cell heat insulation frame or the aforementioned cell heat insulation structure, the effect and efficiency of managing cell thermal runaway are effectively improved without increasing the volume and manufacturing cost of the cell heat insulation frame.

[0098] Specifically, such as Figure 6 As shown, the battery module includes at least one cell group, and the aforementioned cell heat insulation frame is sandwiched between at least two adjacent individual cells 6 in the at least one cell group. Further, when the number of cell groups is at least two, the aforementioned cell heat insulation frame is sandwiched between at least two adjacent cell groups. Then, depending on actual operating conditions, heat insulation components may or may not be provided within the heat insulation holes 3 of the cell heat insulation frame.

[0099] This utility model also provides a battery pack, including the aforementioned cell heat insulation frame, or the aforementioned cell heat insulation structure, or the aforementioned battery module. By adopting the aforementioned cell heat insulation frame, cell heat insulation structure, or battery module, the safety of the battery pack can be effectively improved and the manufacturing cost of the battery pack can be reduced.

[0100] Specifically, such as Figure 6 As shown, the battery pack also includes a battery box 8, which includes a box body 81 and a box cover 82 connected to each other. An accommodating space is formed between the box body 81 and the box cover 82, and the assembled battery module is housed in the accommodating space.

[0101] This utility model also provides a vehicle that includes the aforementioned cell heat insulation frame, or the aforementioned cell heat insulation structure, or the aforementioned battery module, or the aforementioned battery pack. By adopting the aforementioned cell heat insulation frame, cell heat insulation structure, battery module, or battery pack, the safety of vehicle use can be effectively improved, and the production cost of the vehicle can be reduced.

[0102] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cell heat insulation frame, characterized in that, include: Framework body (1); The bellows pipe (2) is connected to the frame body (1) and surrounds the frame body (1) to form a heat insulation hole (3). The heat insulation hole (3) extends along the thickness direction of the frame body (1), and the pipe of the bellows pipe (2) is connected to the heat insulation hole (3).

2. The cell heat insulation frame according to claim 1, characterized in that, The organ pipe (2) is located on top of the frame body (1).

3. The cell heat insulation frame according to any one of claims 1-2, characterized in that, The extension direction of the duct of the organ pipe (2) is perpendicular to the thickness direction of the frame body (1).

4. The cell heat insulation frame according to any one of claims 1-3, characterized in that, Along the thickness direction of the frame body (1), after the frame body (1) is sandwiched between two individual battery cells (6), the accordion tube (2) is located between the two ends of the frame body (1).

5. The cell heat insulation frame according to any one of claims 1-4, characterized in that, The cell heat insulation frame also includes an encapsulation layer (4), which connects the bellows tube (2) to the frame body (1).

6. The cell heat insulation frame according to claim 5, characterized in that: Along the thickness direction of the frame body (1), at least one side of the frame body (1) is provided with the encapsulation layer (4); and / or, The encapsulation layer (4) closes the end of the heat insulation hole (3).

7. The cell heat insulation frame according to any one of claims 5-6, characterized in that, The encapsulation layer (4) is made of a polymer material, the melting point or thermal decomposition temperature of which is greater than or equal to 100°C and less than the minimum thermal runaway temperature of the single cell (6).

8. A cell thermal insulation structure, characterized in that, Includes the cell heat insulation frame as described in any one of claims 1-7.

9. The cell thermal insulation structure according to claim 8, characterized in that, The cell insulation structure also includes an insulation component disposed within the insulation hole (3).

10. The cell thermal insulation structure according to claim 9, characterized in that, The maximum dimension of the heat insulation component along the thickness direction of the frame body (1) is less than the minimum dimension of the heat insulation hole (3) along the thickness direction of the frame body (1) after the frame body (1) is sandwiched between two adjacent single cells (6).

11. The cell thermal insulation structure according to any one of claims 9-10, characterized in that, The frame body (1) has encapsulation layers (4) on both sides along its thickness direction. The encapsulation layers (4) connect the bellows tube (2) to the frame body (1), and the two encapsulation layers (4) seal the two ends of the heat insulation hole (3) to form a heat insulation space. The heat insulation component is located in the heat insulation space.

12. The cell thermal insulation structure according to any one of claims 9-11, characterized in that, The heat insulation component includes a liquid-absorbing part (5), which is made of a liquid-absorbing material.

13. A battery module, characterized in that, It includes the cell heat insulation frame as described in any one of claims 1-7, or the cell heat insulation structure as described in any one of claims 8-12.

14. A battery pack, characterized in that, It includes the cell heat insulation frame as described in any one of claims 1-7, or the cell heat insulation structure as described in any one of claims 8-12, or the battery module as described in claim 13.

15. A vehicle, characterized in that, It includes the cell heat insulation frame according to any one of claims 1-7, or the cell heat insulation structure according to any one of claims 8-12, or the battery module according to claim 13, or the battery pack according to claim 14.

Images