Heat insulation part, battery pack and vehicle

Abstract

The utility model provides a heat insulation part, a battery pack and a vehicle. The heat insulation part comprises a frame body, a first heat insulation beam and a heat insulation pad, the first heat insulation beam is arranged in the frame body and connected with the frame body, and the frame body is divided into a first heat insulation area and a second heat insulation area by the first heat insulation beam; the heat insulation pad is arranged in the first heat insulation area and connected with the frame body. In the case of thermal runaway of the battery cell, a cooling medium flowing out of the cold plate can flow into the frame body, and the second heat insulation area is not provided with a heat insulation pad, so that the cooling medium in the second heat insulation area can be directly contacted with a large surface of the battery cell, and the thermal runaway battery cell or the battery cells on the periphery of the thermal runaway battery cell can be timely and efficiently cooled; and the spreading of the thermal runaway phenomenon can be slowed down. And meanwhile, under the condition that the liquid amount of the cooling medium flowing out of the cold plate is insufficient, the heat insulation pad positioned in the first heat insulation area can also play a certain heat insulation role between the large surfaces of the battery cells, so that the spreading of the thermal runaway phenomenon is further slowed down.

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 dissipate heat from the thermally runaway battery cell, which is not conducive to controlling the spread of thermal runaway. Utility Model Content

[0004] In view of this, this application provides a heat insulation component, a battery pack, and a vehicle, thereby at least solving the problem that the heat insulation component in the prior art has a single function and cannot meet the problem of heat dissipation for thermal runaway battery cells.

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

[0006] This application provides a heat insulation component, including a frame, a first heat insulation beam, and a heat insulation pad; the first heat insulation beam is disposed within the frame and connected to the frame, and the first heat insulation beam divides the frame into a first heat insulation zone and a second heat insulation zone; the heat insulation pad is disposed in the first heat insulation zone and connected to the frame.

[0007] Optionally, the frame includes a top frame and a bottom frame arranged opposite each other along a first direction, and two side frames arranged opposite each other along a second direction, wherein the first direction intersects the second direction; the first heat insulation beam is connected to the two side frames; the first heat insulation beam, the two side frames, and the top frame form a first heat insulation area, and the first heat insulation beam, the two side frames, and the bottom frame form a second heat insulation area.

[0008] Optionally, at least one of the side frames is provided with a liquid inlet hole, which is connected to the second heat insulation zone.

[0009] Optionally, the liquid inlet is located on the side of the side frame near the bottom frame, and the distance between the liquid inlet and the bottom frame is 5mm to 10mm.

[0010] Optionally, the heat insulation component further includes a second heat insulation beam; the second heat insulation beam is disposed in the second heat insulation area, one end of the second heat insulation beam is connected to the first heat insulation beam, and the other end of the second heat insulation beam is connected to the bottom frame.

[0011] Optionally, the second heat insulation beam is connected with a midpoint of the first heat insulation beam, and / or the second heat insulation beam is connected with a midpoint of the bottom frame.

[0012] Optionally, a part where the first heat insulation beam is connected with the second heat insulation beam forms a contact part, and an area ratio of the contact part to an area of the second heat insulation region is 5% to 25%.

[0013] Optionally, a thickness of the frame body is T1, and a thickness of the first heat insulation beam is T2, wherein 20% T1≤T2

[0014] Optionally, a size of the frame body along the first direction is H, and a size of the heat insulation pad along the first direction is H1, wherein 20% H≤H1≤70% H.

[0015] The application further provides a battery pack comprising a plurality of battery cells and the heat insulation member as any one of the preceding embodiments, the heat insulation member being arranged between two adjacent battery cells, and a surface of the frame body abutting against a surface of the battery cell.

[0016] The application provides a vehicle comprising the battery pack as the preceding embodiment.

[0017] Compared with the prior art, the heat insulation member, the battery pack and the vehicle have the following advantages:

[0018] In the heat insulation member, the first heat insulation beam divides the frame body into the first heat insulation region and the second heat insulation region, and the heat insulation pad is arranged in the first heat insulation region. In the case of thermal runaway of the battery cell, the cooling medium flowing out of the cold plate can flow into the frame body from the gap between the frame body and the battery cell. Since the second heat insulation region is not provided with the heat insulation pad, the cooling medium in the second heat insulation region can directly contact the large surface of the battery cell, thereby playing a timely and efficient cooling effect on the thermal runaway battery cell or the battery cell on the side of the thermal runaway battery cell, helping to slow down the spread of the thermal runaway phenomenon and avoiding the occurrence of fire, explosion and the like of the battery pack, thereby improving the use safety of the battery pack. Meanwhile, in the case that the liquid amount of the cooling medium flowing out of the cold plate is insufficient, the heat insulation pad in the first heat insulation region can also play a certain heat insulation effect between the large surfaces of the two adjacent battery cells, so that the heat insulation member can have both heat insulation and cooling effects, thereby effectively slowing down the spread of the thermal runaway phenomenon.

[0019] The battery pack and the vehicle have the same or similar advantages as the battery pack as the preceding embodiment, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and serve as an aid in explaining the application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a schematic view of a heat insulation piece in an embodiment of the present application;

[0022] Figure 2 is a front view of a heat insulation piece in an embodiment of the present application;

[0023] Figure 3 is a schematic view of a heat insulation piece placed in a battery pack in an embodiment of the present application;

[0024] Figure 4 is a schematic view of another heat insulation piece placed in a battery pack in an embodiment of the present application.

[0025] Legend of reference signs:

[0026] 01-heat insulation piece, 02-cell;

[0027] 1-frame, 21-first heat insulation beam, 22-second heat insulation beam, 3-heat insulation pad, 11-liquid inlet hole, 12-exhaust hole, 13-sub-cavity, 101-top frame, 102-bottom frame, 103-side frame, 23-contacting part;

[0028] Z-first direction, X-second direction. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] The terms “first”, “second”, and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by “first”, “second”, etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, “and / or” in the specification and claims indicates at least one of the connected objects, and the character “ / ” generally indicates that the front and rear associated objects are in an “or” relationship.

[0031] The term "comprise", "contain" or "include" or any other variant thereof in the specification and in the claims of the present application is intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise, contain or include a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0032] A kind of heat insulation part, battery pack and vehicle provided by the present application are described in detail below by listing specific embodiments.

[0033] The present application provides a kind of heat insulation part, Figure 1 It is the schematic diagram of a kind of heat insulation part in the present application embodiment, Figure 2 It is the front view of a kind of heat insulation part in the present application embodiment, refer to Figure 1 And Figure 2 The heat insulation part includes frame 1, first heat insulation beam 21 and heat insulation pad 3;First heat insulation beam 21 is arranged in frame 1 and is connected with frame 1, and first heat insulation beam 21 divides frame 1 into first heat insulation area and second heat insulation area;Heat insulation pad 3 is arranged in first heat insulation area, and is connected with frame 1.

[0034] Wherein, frame 1 forms the main framework of heat insulation part, frame 1 can be made of any one or more of aluminum alloy, steel alloy, magnesium alloy, thermoplastic, composite material, etc., and the formed frame 1 has good strength stiffness and good impact deformation resistance.In some embodiments, frame 1 is made of thermoplastic or composite material, which has lighter weight on the basis of meeting the impact deformation resistance, which is conducive to the lightweight design of battery pack.

[0035] First heat insulation beam 21 and heat insulation pad 3 are arranged in frame 1, and first heat insulation beam 21 and heat insulation pad 3 are made of materials with low thermal conductivity, wherein heat insulation pad 3 can be made of aerogel heat insulation pad, which has very low thermal conductivity and can effectively prevent heat conduction, and at the same time, aerogel heat insulation pad has good structural strength and can withstand certain pressure and impact, which helps to prolong the service life of heat insulation part, and at the same time, aerogel heat insulation pad has low density and light weight, which helps to reduce the weight of heat insulation part.

[0036] Referring to Figure 1 And Figure 2 The heat insulation part of the present application embodiment has first direction Z and second direction X, first direction Z intersects with second direction X, the angle between first direction Z and second direction X can be any angle, Figure 1 And Figure 2In the heat insulation piece shown in the figure, the first direction Z and the second direction X are perpendicular to each other, so that the frame body 1 is a rectangular frame body 1. Among them, "perpendicular" not only includes the case of absolute perpendicular, but also includes the case of approximately perpendicular in the general understanding, such as the case where the included angle between the first direction Z and the second direction X is 89°-91°, which is regarded as the first direction Z and the second direction X being perpendicular to each other. At the same time, the first direction Z can be regarded as the height direction of the heat insulation piece, and the second direction X can be regarded as the width direction of the heat insulation piece,

[0037] When the heat insulation piece is used in the battery pack, it is usually placed between the large faces of two adjacent battery cells. Among them, the battery cell in the embodiment of the application refers to a square battery cell, which includes a top wall, a bottom wall and a side wall between the top wall and the bottom wall. The top wall is usually provided with a pole for connecting with the busbar. The side wall includes four surfaces of the battery cell, two of which are oppositely arranged. The two surfaces with relatively large area are the large faces of the battery cell, and the two surfaces with relatively small area are the side faces of the battery cell. The heat insulation piece is placed between the large faces of two adjacent battery cells, and the two surfaces of the frame body 1 in the heat insulation piece along the thickness direction thereof are respectively in abutment with the corresponding large faces of the battery cells. Among them, the thickness direction of the frame body 1 is perpendicular to the first direction Z and the second direction X.

[0038] However, in actual application, if the battery cell works in a high temperature environment for a long time, or a more serious overcharge or overdischarge occurs, the battery cell may have a thermal runaway phenomenon. If the battery cell has a thermal runaway, the thermal runaway battery cell will spew out a large amount of high-temperature gas, smoke and flames, and the high-temperature gas and flames may melt the cold plate on the side face of the battery cell, causing the cooling medium in the cold plate to flow out. In actual application, under the influence of machining error, the surface of the frame body 1 or the battery cell may have a small amount of unevenness, thereby causing some gaps between the frame body 1 and the battery cell, or under the influence of assembly error, battery pack shaking and the like, some gaps may also be generated between the frame body 1 and the battery cell. The cooling medium flowing out of the cold plate can flow into the frame body 1 from the gap between the frame body 1 and the battery cell. Since the heat insulation piece is located between the large faces of two adjacent battery cells, the cooling medium can flow into the large faces of the two adjacent battery cells, thereby cooling the battery cells.

[0039] In the heat insulation piece of the embodiment, the first heat insulation beam 21 is arranged in the frame body 1 and connected with the frame body 1. The first heat insulation beam 21 can be arranged to extend along the first direction Z, arranged to extend along the second direction X, or arranged to extend along a direction inclined to the first direction Z or the second direction X, and can be flexibly arranged according to actual needs. The first heat insulation beam 21 divides the frame body 1 into a first heat insulation area and a second heat insulation area. The heat insulation pad 3 is arranged in the first heat insulation area and connected with the frame body 1. In the case of thermal runaway of the battery cell, the cooling medium flowing out of the cold plate can flow into the frame body from the gap between the frame body 1 and the battery cell. Since the second heat insulation area is not provided with the heat insulation pad 3 and is in a hollow state, the cooling medium in the second heat insulation area can directly contact the large surface of the battery cell, thereby timely and efficiently cooling the thermal runaway battery cell or the battery cell around the thermal runaway battery cell, helping to slow down the spread of the thermal runaway phenomenon and avoiding the occurrence of fire and explosion of the battery pack, thereby improving the use safety of the battery pack. At the same time, in the case that the liquid amount of the cooling medium flowing out of the cold plate is insufficient, the heat insulation pad 3 located in the first heat insulation area can also play a certain heat insulation effect between the large surfaces of the adjacent two battery cells, so that the heat insulation piece can have both heat insulation and cooling effects, thereby effectively slowing down the spread of the thermal runaway phenomenon.

[0040] Optionally, in some embodiments of the present application, the frame body 1 includes a top frame 101 and a bottom frame 102 arranged opposite along the first direction, and two side frames 103 arranged opposite along the second direction. The first heat insulation beam 21 is connected with the two side frames 103. The first heat insulation beam 21 and the two side frames 103 and the top frame 101 form the first heat insulation area therebetween. The first heat insulation beam 21 and the two side frames 103 and the bottom frame 102 form the second heat insulation area therebetween.

[0041] In combination with the foregoing embodiments, the first heat insulation beam 21 can be arranged to extend along the first direction Z, so that the two ends of the first heat insulation beam 21 are connected with the top frame 101 and the bottom frame 102, respectively. The first heat insulation beam 21 can also be arranged to extend along the second direction X, so that the two ends of the first heat insulation beam 21 are connected with the two side frames 103, respectively. The first heat insulation beam 21 can also be arranged to extend along a direction inclined to the first direction Z or the second direction X, to form other connection modes. Figure 1 and Figure 2 In the heat insulation piece shown, the first heat insulation beam 21 is arranged in the frame body 1 along the second direction X. The two ends of the first heat insulation beam 21 are connected with the corresponding side frames 103, respectively. The connection mode can be assembly connection, welding, limiting clamping, adhesive connection, etc., which is not limited in the present embodiment.

[0042] Similarly, the heat insulation pad 3 is arranged in the first heat insulation area, the heat insulation pad 3 can be connected with the top frame 101 and the first heat insulation beam 21, the heat insulation pad 3 can also be connected with the two side frames 103, the heat insulation pad 3 can also be connected with the top frame 101, the two side frames 103 and the first heat insulation beam 21 respectively, and the heat insulation pad 3 also has various connection modes, which are determined according to the size of the first heat insulation area and the area size of the heat insulation pad 3. Figure 1 and Figure 2 In the heat insulation member shown, the heat insulation pad 3 is connected with the top frame 101, the two side frames 103 and the first heat insulation beam 21 respectively, that is, the heat insulation pad 3 covers the entire first heat insulation area, so as to improve the installation stability of the heat insulation pad 3 in the first heat insulation area.

[0043] It can be understood that after the cooling medium flows into the frame body 1, under the action of gravity, the cooling medium will flow or accumulate towards the side where the bottom frame 102 is located, and in the embodiment, the first heat insulation beam 21 and the two side frames 103 and the bottom frame 102 surround to form a second heat insulation area, the second heat insulation area is not provided with the heat insulation pad 3 and is in a hollow state, so as to not block the inflowing cooling medium, and a large amount of cooling medium can be filled between the large faces of the adjacent two battery cells, which helps the cooling medium to fully contact the large faces of the battery cells, so as to achieve better cooling effect.

[0044] In addition, the first heat insulation beam 21 and the two side frames 103 and the top frame 101 surround to form a first heat insulation area, and the heat insulation pad 3 is located in the first heat insulation area close to the top frame 101. If the liquid volume of the cooling medium flowing out of the cold plate is insufficient and cannot cover the large faces of the battery cells, the heat insulation pad 3 can also play a certain heat insulation role between the large faces of the adjacent two battery cells at this time, block the heat transfer, and slow down the spread of the thermal runaway phenomenon to a certain extent.

[0045] Optionally, at least one side frame 103 is provided with a liquid inlet hole 11, and the liquid inlet hole 11 is in communication with the second heat insulation area. The provision of the liquid inlet hole 11 is more conducive to the rapid inflow of the cooling medium flowing out of the cold plate into the frame body 1, and helps to realize the timely cooling of the thermal runaway battery cell. The liquid inlet hole 11 can be arranged on one side frame 103, or can be arranged on two side frames 103, and the specific arrangement can be made according to the liquid volume of the cooling medium flowing out of the cold plate and the space between the large faces of the adjacent two battery cells, which is not limited in the embodiment.

[0046] Optionally, referring to Figure 1 and Figure 2As shown in the drawings, in some embodiments of the present application, the liquid inlet hole 11 is arranged on the side frame 103 close to the bottom frame 102, and the distance between the liquid inlet hole 11 and the bottom frame 102 is 5-10 mm, for example, the distance between the liquid inlet hole 11 and the bottom frame 102 can also be 6 mm, 7 mm, 8 mm, 9 mm, etc. It can be understood that the liquid inlet hole 11 should not be arranged on the bottom frame 102, because direct arrangement on the bottom frame 102 will cause leakage of the cooling medium. In addition, under the action of gravity, the cooling medium will flow or accumulate on the side where the bottom frame 102 is located, so in this embodiment, the liquid inlet hole 11 is arranged on the side frame 103 close to the bottom frame 102, so as to facilitate the smooth flow of the cooling medium.

[0047] Optionally, referring to Figure 1 and Figure 2 As shown in the drawings, in some embodiments of the present application, the heat insulation member further comprises a second heat insulation beam 22, the second heat insulation beam 22 is arranged in the second heat insulation area, one end of the second heat insulation beam 22 is connected with the first heat insulation beam 21, and the other end of the second heat insulation beam 22 is connected with the bottom frame 102. In this way, the second heat insulation beam 22 divides the second heat insulation area into two sub-cavities 13. The connection between the second heat insulation beam 22 and the first heat insulation beam 21 and the bottom frame 102 can be achieved by laser welding, fastener assembly connection such as bolts and screws, adhesive connection, limit clamping, etc., and the present embodiment is not limited thereto. In addition, the second heat insulation beam 22 can be arranged extending along the first direction Z, or can be arranged extending along a direction inclined to the first direction Z, which can be flexibly arranged according to actual needs.

[0048] Therefore, in the present embodiment, the heat insulation member is connected with the side frame 103 through the first heat insulation beam 21, and is connected with the bottom frame 102 through the second heat insulation beam 22, which helps to improve the connection reliability of the two heat insulation beams and the frame 1, and further helps to improve the structural reliability and stability of the heat insulation member, improve the ability of the heat insulation member to resist impact and deformation, and prolong the service life of the heat insulation member.

[0049] Optionally, referring to Figure 1 and Figure 2 As shown in the drawings, in some embodiments of the present application, the second heat insulation beam 22 is connected with the midpoint of the first heat insulation beam 21, and / or the second heat insulation beam 22 is connected with the midpoint of the bottom frame 102. Specifically, the present embodiment means that the second heat insulation beam 22 can be connected with only the midpoint of the first heat insulation beam 21, or can be connected with only the midpoint of the bottom frame 102, or can be connected with the midpoints of the first heat insulation beam 21 and the bottom frame 102 respectively. Figure 1 and Figure 2In the heat insulation component shown, the second heat insulation beam 22 is connected to the midpoint of the first heat insulation beam 21 and the bottom frame 102 respectively, and the second heat insulation beam 22 is perpendicular to the first heat insulation beam 21 and the bottom frame 102 respectively. This makes the structure of the heat insulation component close to the left-right symmetrical structure, which helps to improve the structural reliability and stability of the heat insulation component.

[0050] Furthermore, in some embodiments, the proportion of the dimension of the first heat insulation beam 21 along the first direction Z to the dimension of the frame 1 along the first direction Z can be 10% to 20%, or the proportion of the dimension of the second heat insulation beam 22 along the second direction X to the dimension of the frame 1 along the second direction X can be 10% to 30%, so as to avoid the first heat insulation beam 21 and the second heat insulation beam 22 being too large or too heavy.

[0051] Optionally, refer to Figure 2 and Figure 3 As shown, in some embodiments of this application, the portion where the first heat-insulating beam 21 and the second heat-insulating beam 22 are connected forms a contact portion 23. The area of ​​the contact portion 23 accounts for 5% to 25% of the area of ​​the second heat-insulating region 13. The contact portion 23 is used to contact the large surface of the battery cell when the battery cell expands. The degree of expansion of different areas of the large surface of the battery cell may be different when the battery cell expands. Therefore, the contact portion 23 can be correspondingly set in the area with a higher degree of expansion. That is, the portion where the second heat-insulating beam 22 and the first heat-insulating beam 21 are connected can correspond to the area with a higher degree of expansion of the large surface of the battery cell. Thus, when the battery cell expands, the contact portion 23 first contacts the large surface of the battery cell. If the degree of expansion of the battery cell is more severe, the second heat-insulating beam 22 and the first heat-insulating beam 21 will also contact the large surface of the battery cell.

[0052] In some embodiments, the contact portion 23 is located in the central region within the frame 1. Typically, since the central region of the large surface area of ​​the battery cell expands more significantly during expansion, this embodiment places the contact portion 23 in the central region of the frame 1. This allows the contact portion 23 to first contact the central region of the large surface area of ​​the battery cell during expansion. If expansion continues, the second heat-insulating beam 22 and the first heat-insulating beam 21 gradually contact the edge regions of the large surface area of ​​the battery cell. It should be noted that the center of the large surface area of ​​the battery cell refers to the intersection point formed by connecting the midpoints of each side of the battery cell. The central region of the large surface area of ​​the battery cell refers to the area formed radially outward from the intersection point, while all areas of the large surface area of ​​the battery cell other than the central region are considered edge regions of the large surface area of ​​the battery cell.

[0053] Further, the area ratio of the contact portion 23 to the second heat insulation area 13 is 5% to 25%. For example, the area ratio of the contact portion 23 to the second heat insulation area 13 can be 10%, 15%, 20%, etc. Within the above range, the contact portion 23 can be in full contact with the main expansion area of the large face of the battery cell, achieving effective heat insulation effect, and avoiding the contact portion 23 occupying too much space of the second heat insulation area 13, thereby ensuring that the cooling medium can be fully filled in the second heat insulation area 13, i.e., between the large faces of the battery cells, achieving effective cooling effect, and also controlling the weight of the heat insulation member, avoiding waste of heat insulation material.

[0054] Further, in some embodiments, the top frame 101 is provided with an exhaust hole 12. Since the cooling medium will vaporize after absorbing heat, if the gas is excessively accumulated between the large faces of the two battery cells, the air pressure between the large faces of the two battery cells will increase, thereby causing the cooling medium to fail to flow in smoothly. Since the high-temperature gas formed after the cooling medium vaporizes will flow upward, the exhaust hole 12 is provided on the top frame 101 to exhaust the gas between the large faces of the two battery cells, thereby avoiding excessive accumulation of the gas, and helping to keep the air pressure between the large faces of the two battery cells within a normal range, so that the cooling medium can flow in smoothly to cool and lower the temperature of the battery cells.

[0055] Optionally, in some embodiments of the present application, the thickness of the frame body 1 is T1, and the thickness of the first heat insulation beam 21 is T2, wherein 20% T1≤T2

[0056] In addition, the thickness of the second heat insulation beam 22 can be set to be approximately the same as the thickness of the first heat insulation beam 21 to ensure the service life of the second heat insulation beam 22. The thickness of both the first heat insulation beam 21 and the second heat insulation beam 22 is less than the thickness of the frame 1, which helps to reduce the total weight of the heat insulation components.

[0057] Optionally, refer to Figure 4 As shown, in some embodiments of this application, the dimension of the frame 1 along the first direction Z is H, and the dimension of the heat insulation pad 3 along the first direction Z is H1, wherein H and H1 satisfy: 20%H≤H1≤70%H. For example, the dimension H1 of the heat insulation pad 3 along the first direction Z can be 30%H, 40%H, 50%H, 60%H, etc. It can be understood that if the dimension of the heat insulation pad 3 along the first direction Z is larger, the dimension of the second chamber 3 along the first direction Z is smaller, and the heat insulation effect provided by the heat insulation component 01 to the battery cell 02 is better. If the dimension of the heat insulation pad 3 along the first direction Z is smaller, the dimension of the second chamber 3 along the first direction Z is larger, and the cooling and heat dissipation effect provided by the heat insulation component 01 to the battery cell 02 is better. In practical applications, the dimension of the heat insulation pad 3 along the first direction Z can be flexibly set according to the heat insulation and heat dissipation requirements of the battery cell. This embodiment does not limit this.

[0058] This application also provides a battery pack. Figure 3 and Figure 3 These are schematic diagrams illustrating a heat insulation component 01 placed inside a battery pack according to an embodiment of this application. Figure 3 This is a schematic diagram viewed along the side wall of cell 02. Figure 4 This is a schematic diagram viewed along the large surface of cell 02, refer to... ​ and ​ The battery pack includes multiple battery cells 02 and a heat insulation component 01. The heat insulation component 01 is located between two adjacent battery cells 02, and the surface of the frame 1 abuts against the surface of the battery cell 02.

[0059] Specifically, the plurality of battery cells 02 are connected in series or in parallel to form a battery cell group, and the thermal insulation piece 01 is arranged between two adjacent battery cells 02, the surface of the frame body 1 of the thermal insulation piece 01 abuts against the large face of the two adjacent battery cells 02, and the size of the frame body 01 is close to the size of the large face of the battery cell 02. Among them, the thermal insulation piece 01 adopts the thermal insulation piece as described in any one of the preceding embodiments, and in the case of thermal runaway of the battery cell 02, the cooling medium flowing out of the cold plate can flow into the frame body 1 from the liquid inlet hole 11 and directly contact the large face of the battery cell 02, so that the thermal insulation piece 01 can play a role in cooling the thermal runaway battery cell or its circumferential side battery cell in a timely and efficient manner in the case of thermal runaway of the battery cell 02, which helps to slow down the spread of the thermal runaway phenomenon and avoid the occurrence of fire, explosion and the like of the battery pack, thereby improving the use safety of the battery pack. At the same time, in the case that the liquid amount of the cooling medium flowing out of the cold plate is insufficient to cover the large face of the battery cell 02, the thermal insulation pad 3 in the thermal insulation piece 01 can also play a certain thermal insulation role between the large faces of the two adjacent battery cells 02, so that the thermal insulation piece 01 has both thermal insulation effects, to a certain extent, slowing down the spread of the thermal runaway phenomenon and further ensuring the use safety of the battery pack.

[0060] The embodiments of the present application also provide a vehicle, which can be a pure electric vehicle or a hybrid vehicle, and the vehicle comprises the battery pack as described in the preceding embodiments, so that the safety performance of the vehicle is improved.

[0061] It should be understood that the "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, "in some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0062] Finally, it should be further noted that the above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A heat insulation component, characterized in that, It includes a frame (1), a first heat insulation beam (21), and a heat insulation pad (3); The first heat insulation beam (21) is disposed inside the frame (1) and connected to the frame (1). The first heat insulation beam (21) divides the frame (1) into a first heat insulation zone and a second heat insulation zone. The heat insulation pad (3) is located in the first heat insulation area and is connected to the frame (1).

2. The heat insulation component according to claim 1, characterized in that, The frame (1) includes a top frame (101) and a bottom frame (102) arranged opposite each other along a first direction (Z) and two side frames (103) arranged opposite each other along a second direction (X), wherein the first direction (Z) intersects the second direction (X); The first heat insulation beam (21) is connected to the two side frames (103); The first heat insulation beam (21) is arranged with the two side frames (103) and the top frame (101) to form the first heat insulation area, and the first heat insulation beam (21) is arranged with the two side frames (103) and the bottom frame (102) to form the second heat insulation area.

3. The heat insulation component according to claim 2, characterized in that, At least one of the side frames (103) is provided with a liquid inlet hole (11), which is connected to the second heat insulation zone.

4. The heat insulation component according to claim 3, characterized in that, The liquid inlet (11) is located on the side of the side frame (103) near the bottom frame (102), and the distance between the liquid inlet (11) and the bottom frame (102) is 5mm~10mm.

5. The heat insulation component according to claim 2, characterized in that, It also includes a second heat insulation beam (22); The second heat insulation beam (22) is located in the second heat insulation area. One end of the second heat insulation beam (22) is connected to the first heat insulation beam (21), and the other end of the second heat insulation beam (22) is connected to the bottom frame (102).

6. The heat insulation component according to claim 5, characterized in that, The second heat insulation beam (22) is connected to the midpoint of the first heat insulation beam (21), and / or the second heat insulation beam (22) is connected to the midpoint of the bottom frame (102).

7. The heat insulation component according to claim 5, characterized in that, The part where the first heat insulation beam (21) connects with the second heat insulation beam (22) forms a contact part (23), and the area of ​​the contact part (23) accounts for 5% to 25% of the area of ​​the second heat insulation area (13).

8. The heat insulation member according to any one of claims 1 to 7, characterized in that, The thickness of the frame (1) is T1, and the thickness of the first heat insulation beam (21) is T2, wherein T1 and T2 satisfy: 20%T1≤T2<T1.

9. The heat insulation member according to any one of claims 2 to 7, characterized in that, The frame (1) has a dimension of H along the first direction (Z), and the heat insulation pad (3) has a dimension of H1 along the first direction (Z), wherein H and H1 satisfy: 20%H≤H1≤70%H.

10. A battery pack, characterized in that, It includes a plurality of battery cells (02) and a heat insulation member (01) as described in any one of claims 1 to 9, wherein the heat insulation member (01) is disposed between two adjacent battery cells (02) and the surface of the frame (1) abuts against the surface of the battery cells (02).

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

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