Thermal insulation and battery pack

Abstract

The application provides a heat insulation piece and a battery pack. The heat insulation piece is arranged on at least one side of a battery cell of the battery pack. The heat insulation piece comprises a heat insulation body and a first protrusion. The heat insulation body comprises a first surface and a second surface which are oppositely arranged along a first direction, and the first surface faces the battery cell. The first protrusion is protrudingly arranged on the first surface, and the first protrusion is used to contact the battery cell. The first protrusion and the heat insulation body form a first heat conduction channel. The heat insulation piece and the battery pack provided by the application can improve the heat dissipation efficiency of the battery cell, reduce the heat accumulation generated by the battery cell, and further improve the safety and operation stability of the battery pack formed by the heat insulation piece and the battery cell.

Description

Technical Field

[0001] This application belongs to the field of battery heat dissipation technology, and particularly relates to a heat insulation component and a battery pack. Background Technology

[0002] Thermal runaway management in energy storage systems plays a crucial role in improving their safety and operational stability. Current thermal runaway management methods involve placing thermal insulation pads between battery cells to reduce heat conduction and thus minimize inter-cell thermal interactions. However, in existing battery packs, only liquid cooling plates attached to the bottom of the cells provide heat dissipation, while thermal insulation pads are attached to the larger surfaces of the cells to isolate heat conduction between adjacent cells. This method only allows heat dissipation from the bottom of the cells; the larger surfaces of the cells with thermal insulation pads cannot dissipate heat, leading to heat accumulation and impacting the safety and operational stability of the battery pack. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides a heat insulation component and a battery pack that can improve the heat dissipation efficiency of the battery cells, reduce the accumulation of heat generated by the battery cells, and thereby improve the safety and operational stability of the battery pack formed by the heat insulation component and the battery cells.

[0004] On one hand, this application provides a heat insulation component for being disposed on at least one side of a cell in a battery pack, comprising: The heat insulation body includes a first surface and a second surface disposed opposite to each other along a first direction, the first surface facing the battery cell; A first protrusion is provided on the first surface and is used to contact the battery cell; the first protrusion and the heat insulation body form a first heat conduction channel.

[0005] In one possible implementation, the heat insulation member is disposed between two adjacent cells of the battery pack; the first surface faces one of the cells, and the second surface faces the other cell; the first protrusion is used to contact one of the cells; the heat insulation member further includes a second protrusion, which protrudes from the second surface and is used to contact the other cell; the second protrusion and the heat insulation body form a second heat-conducting channel.

[0006] In one possible implementation, there are multiple first protrusions, and the multiple first protrusions and the heat insulation body form multiple first heat conduction channels.

[0007] In one possible implementation, each of the first protrusions extends along a second direction to both ends of the heat insulation body, and a plurality of the first protrusions are arranged sequentially at intervals along a third direction; two adjacent first protrusions and the heat insulation body form a first heat conduction channel; wherein, the second direction is different from the first direction, the third direction is different from the first direction, and the third direction is also different from the second direction.

[0008] In one possible implementation, at least one of the first heat conduction channels includes a first segment and a second segment connected in the second direction; in the third direction, the dimension of the end of the first segment away from the second segment is greater than the dimension of the second segment away from the first segment.

[0009] In one possible implementation, in the second direction, the length of the first segment is less than the length of the second segment.

[0010] In one possible implementation, the dimension of the first segment from the end away from the second segment to the point where the first segment and the second segment connect gradually decreases, while the dimension of the second segment from the point where the first segment and the second segment connect to the point where the second segment is away from the first segment gradually increases.

[0011] In one possible implementation, at least one of the first protrusions has a linear structure on the side away from the heat insulation body, so that at least one of the first protrusions forms a line contact with one of the battery cells.

[0012] In one possible implementation, a plurality of the first protrusions are arrayed on the first surface of the heat insulation body, and the first heat conduction channel formed by the plurality of the first protrusions and the heat insulation body is in a grid shape.

[0013] In one possible implementation, at least one of the first protrusions has a dotted structure on the side away from the heat insulation body, so that at least one of the first protrusions forms a point contact with one of the battery cells.

[0014] On the other hand, this application provides a battery pack, including: Battery cell; A heat insulation element is disposed on one side of the battery cell, and the first protrusion of the heat insulation element contacts the battery cell.

[0015] The heat insulation component and battery pack provided in this application have a first protrusion on the heat insulation body that contacts the battery cell. The first protrusion and the heat insulation body form a first thermal conduction channel, which can conduct the heat generated by one of the two adjacent battery cells to the outside of the battery cell and the heat insulation component for heat dissipation. Therefore, the heat generated by the battery cell can be conducted to the outside of the battery cell and the heat insulation component through the side of the battery cell and the first thermal conduction channel, which helps to further improve the heat dissipation efficiency of the battery cell, reduce the accumulation of heat generated by the battery cell, and thus improve the safety and operational stability of the battery pack formed by the heat insulation component and the battery cell. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some implementation methods provided by the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a battery pack provided in one embodiment of this application; Figure 2 This is a cross-sectional view of a battery pack provided in one embodiment of this application; Figure 3 This is a cross-sectional view of the heat dissipation of a battery pack according to an embodiment of this application; Figure 4 This is a heat dissipation diagram of a battery pack from a stereoscopic perspective, provided in an embodiment of this application. Figure 5 This is a structural diagram of a heat insulation component provided in one embodiment of this application; Figure 6 yes Figure 5 The front and top views of the insulation component are shown. Figure 7 This is a structural diagram of another heat insulation component provided in one embodiment of this application; Figure 8 This is a structural diagram of another heat insulation component provided in an embodiment of this application; Figure 9 yes Figure 8 The front and top views of the insulation component are shown. Figure 10 This is a structural diagram of another heat insulation component provided in an embodiment of this application; Figure 11 yes Figure 10 The front and top views of the insulation component are shown.

[0018] Explanation of icon numbers: Battery pack-100, cell-10, first cell-11, first side-111, first bottom-112, second cell-12, second side-121, second bottom-122, condenser plate-20, heat insulation component-30, heat insulation body-31, first surface-311, second surface-312, first protrusion-32, first heat conduction channel-33, first segment-331, second segment-332, second protrusion-34, second heat conduction channel-35, first connecting channel-36. Detailed Implementation

[0019] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] The following descriptions of the embodiments are based on the accompanying drawings and are used to illustrate specific embodiments in which this application can be implemented. Directional terms used in the description of this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top surface," "side surface," "bottom surface," "top wall," "side wall," "bottom wall," "inner side wall," "outer side wall," "length direction," "width direction," and "height direction," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, terms such as "first," "second," "third," and "fourth" are only used to distinguish the described objects and do not have any sequential or technical meaning. In the description of this application, the terms "connection" and "linkage," unless otherwise specified, include both direct connection (linkage) and indirect connection (linkage).

[0021] Please see Figures 1 to 4 , Figure 1 This is a structural diagram of a battery pack according to an embodiment of this application. Figure 2 This is a cross-sectional view of a battery pack provided in one embodiment of this application. Figure 3 This is a cross-sectional view of the heat dissipation of a battery pack according to an embodiment of this application. Figure 4 This is a heat dissipation diagram of a battery pack from a stereoscopic perspective, provided in an embodiment of this application.

[0022] This application provides a battery pack 100, which includes at least two battery cells 10, a condenser plate 20, a heat insulation component 30, and a housing (not shown). The at least two battery cells 10, the condenser plate 20, and the heat insulation component 30 are all encapsulated within the housing. The at least two battery cells 10 are stacked along a first direction. The condenser plate 20 is disposed along a second direction on one side of the battery cells 10 and contacts the at least two battery cells 10. The condenser plate 20 is used to dissipate heat from the battery cells 10. The heat insulation component 30 is disposed between two adjacent battery cells 10 and contacts the condenser plate 20. The heat insulation component 30 is used to isolate heat conduction between two adjacent battery cells 10. The first direction is as shown in the figure. Figure 1 The X-axis direction is shown, and the second direction is as follows: Figure 1 The Z-axis direction is shown.

[0023] Specifically, taking at least two battery cells 10 as an example, the at least two battery cells 10 include a first battery cell 11 and a second battery cell 12, which are stacked along a first direction. The peripheral side surface of the first battery cell 11 includes a first side surface 111 and a first bottom surface 112, where the first side surface 111 is the surface with the largest area, and the first bottom surface 112 is connected to the first side surface 111. The peripheral side surface of the second battery cell 12 includes a second side surface 121 and a second bottom surface 122, where the second side surface 121 is the surface with the largest area, and the second bottom surface 122 is connected to the second side surface 121. When the first battery cell 11 and the second battery cell 12 are stacked along the first direction, the first side surface 111 of the first battery cell 11 and the second side surface 121 of the second battery cell 12 are arranged opposite each other along the first direction, and the heat insulation member 30 is sandwiched between the first side surface 111 of the first battery cell 11 and the second side surface 121 of the second battery cell 12. When the first battery cell 11 and the second battery cell 12 are stacked along a first direction, the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12 are spaced apart along the first direction, and the first bottom surface 112 of the first battery cell 11 is perpendicular to the second direction, and the second bottom surface 122 of the second battery cell 12 is also perpendicular to the second direction. A condenser plate 20 is disposed on one side of the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12, and the condenser plate 20 is in contact with the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12. Therefore, the heat generated by the first battery cell 11 can be conducted to the condenser plate 20 through the first bottom surface 112, and the heat generated by the second battery cell 12 can be conducted to the condenser plate 20 through the second bottom surface 122, thereby achieving heat dissipation for both the first battery cell 11 and the second battery cell 12.

[0024] It is understood that in some other embodiments, the battery pack 100 may include three, four, five, eight or more battery cells 10, which are stacked along the first direction. The number of heat insulation components 30 is also multiple, and a heat insulation component 30 is sandwiched between two adjacent battery cells 10. This application does not limit this.

[0025] However, when the heat insulation component 30 provided by the prior art is placed between two adjacent cells 10, heat can only be dissipated through the condenser plate 20 at the bottom of the cell 10. The large surface of the cell 10 with the heat insulation component 30 attached cannot dissipate heat, which can easily lead to heat accumulation and thus affect the safety and operational stability of the battery pack 100.

[0026] Therefore, please refer to Figures 2 to 4 In the battery pack 100 provided in this application, the heat insulation component 30 has a first heat-conducting channel 33. The first heat-conducting channel 33 can conduct the heat generated by the first battery cell 11 to the condenser plate 20, that is, the heat generated by the first battery cell 11 is conducted to the condenser plate 20 through the first side 111 of the first battery cell 11 and the first heat-conducting channel 33. Alternatively, the first heat-conducting channel 33 can conduct the heat generated by the second battery cell 12 to the condenser plate 20, that is, the heat generated by the second battery cell 12 is conducted to the condenser plate 20 through the second side 121 of the second battery cell 12 and the first heat-conducting channel 33. Thus, the heat generated by the first battery cell 11 can be conducted to the condenser plate 20 through the first side 111 and the first heat-conducting channel 33, and the heat generated by the second battery cell 12 can be conducted to the condenser plate 20 through the second side 121 and the first heat-conducting channel 33, which is beneficial to further improve the overall heat dissipation efficiency of the first battery cell 11 or the second battery cell 12, reduce the heat accumulation generated by the first battery cell 11 and the second battery cell 12, and thus improve the safety and operational stability of the battery pack 100.

[0027] like Figure 3 and Figure 4 As shown, after the first battery cell 11 heats up, the heat generated by the first battery cell 11 rises in the first heat-conducting channel 33 and flows between the first battery cell 11 and the casing of the battery pack 100 to the condenser plate 20 to achieve heat exchange, thereby exchanging the hot air generated by the first battery cell 11 into cold air. The cold air formed on the condenser plate 20 enters the first heat-conducting channel 33 to exchange heat with the first battery cell 11, thereby cooling the first battery cell 11, and then forming hot air flowing in the first heat-conducting channel 33. This cycle is repeated to achieve heat exchange between the first battery cell 11 and the condenser plate 20. Figure 4 The arrows in the diagram represent the heat of the air at that location; the lighter the color, the lower the air temperature, and the darker the color, the higher the temperature.

[0028] The thermal insulation component 30 will be described and explained in detail below with reference to the accompanying drawings.

[0029] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 , Figure 5 This is a structural diagram of a heat insulation component provided in one embodiment of this application. Figure 6 yes Figure 5 The front and top views of the insulation component are shown.

[0030] This application provides a heat insulation component 30, which is disposed between two adjacent battery cells 10 in a battery pack 100. The two adjacent battery cells 10 include a first battery cell 11 and a second battery cell 12 stacked along a first direction. That is, the heat insulation component 30 is disposed between the first battery cell 11 and the second battery cell 12, and the heat insulation component 30 is located between the first side 111 of the first battery cell 11 and the second side 121 of the second battery cell 12. The heat insulation component 30 includes a heat insulation body 31 and a first protrusion 32. The first protrusion 32 is disposed on the heat insulation body 31 and is used to contact the first side 111 of the first battery cell 11. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33, which is used to conduct heat from the first side 111 of the first battery cell 11 to the outside of the first battery cell 11 and the heat insulation component 30, thereby improving the heat dissipation efficiency of the first battery cell 11.

[0031] In one specific embodiment, the heat insulation body 31 includes a first surface 311 and a second surface 312 disposed opposite to each other along a first direction. The first surface 311 faces the first side surface 111 of the first battery cell 11, and the second surface 312 faces the second side surface 121 of the second battery cell 12. The heat insulation body 31 also contacts a condenser plate 20 located on one side of the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12. A first protrusion 32 protrudes from the first surface 311 of the heat insulation body 31 and is used to contact the first side surface 111 of the first battery cell 11. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33, which can extend to the condenser plate 20 and is used to conduct heat from the first side surface 111 of the first battery cell 11 to the condenser plate 20.

[0032] The heat insulation component 30 provided in this embodiment is disposed between two adjacent battery cells 10. The heat insulation body 31 of the heat insulation component 30 is provided with a first protrusion 32 that contacts one of the two adjacent battery cells 10. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33. The first heat conduction channel can conduct the heat generated by one of the two adjacent battery cells 10 to the outside of the one of the two adjacent battery cells 10 and the heat insulation component 30 to achieve heat dissipation. Therefore, the heat generated by one of the two adjacent cells 10 can be conducted through the side of the cell 10 and the first heat conduction channel 33 to the outside of the cell 10 and the heat insulation component 30 to achieve heat dissipation. Compared with the traditional battery pack 100 formed by heat dissipation at the bottom of the cell 10, this is beneficial to further improve the heat dissipation efficiency of one of the two adjacent cells 10, reduce the heat accumulation generated by one of the two adjacent cells 10, and thus improve the safety and operational stability of the battery pack 100 formed by the heat insulation component 30 and the cell 10.

[0033] In other words, the heat insulation element 30 is disposed between the first battery cell 11 and the second battery cell 12. The first surface 311 of the heat insulation body 31 faces the first side 111 of the first battery cell 11, and the second surface 312 of the heat insulation body 31 faces the second side 121 of the second battery cell 12. A first protrusion 32 is provided on the first surface 311 of the heat insulation body 31, and the first protrusion 32 contacts the first side 111 of the first battery cell 11. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33. The first heat channel can conduct the heat generated by the first side 111 of the first battery cell 11 to the outside of the first battery cell 11 and the heat insulation element 30, so as to contact the condenser plate 20 to achieve heat dissipation. Therefore, the heat generated by the first cell 11 can be conducted to the outside of the first cell 11 and the heat insulation component 30 through the first side 111 and the first heat conduction channel 33 to achieve heat dissipation. Compared with the traditional battery pack 100 formed by the cell 10 which can only dissipate heat at the bottom, this is beneficial to improve the heat dissipation efficiency of the first cell 11, reduce the heat accumulation generated by the first cell 11, and thus improve the safety and operational stability of the battery pack 100 formed by the heat insulation component 30 together with the first cell 11 and the second cell 12.

[0034] Understandably, in some other embodiments, the first protrusion 32 on the heat insulation body 31 can be disposed on the second surface 312 of the heat insulation body 31, that is, the first protrusion 32 on the heat insulation body 31 contacts the second side surface 121 of the second cell 12. The first heat channel formed by the first protrusion 32 and the heat insulation body 31 is used to conduct the heat generated by the second cell 12 through the second side surface 121 of the second cell 12 and the first heat conduction channel 33 to the outside of the second cell 12 and the heat insulation component 30 to achieve heat dissipation. This is beneficial to improve the heat dissipation efficiency of the second cell 12, reduce the heat accumulation generated by the second cell 12, and thus improve the safety and operational stability of the battery pack 100 formed by the heat insulation component 30 in conjunction with the first cell 11 and the second cell 12. This application does not limit this.

[0035] Understandably, in some other embodiments, the heat insulation element 30 may be disposed on at least one side of one or more battery cells 10 in the battery pack 100. The heat insulation element 30 includes a heat insulation body 31 and a first protrusion 32. The first protrusion 32 is disposed on the heat insulation body 31 and is used to contact one side of one or more battery cells 10. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33. The first heat conduction channel 33 is used to conduct the heat generated by one or more battery cells 10 to the outside of one or more battery cells 10 and the heat insulation element 30, so as to improve the heat dissipation efficiency of one or more battery cells 10. This application does not limit this.

[0036] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6This application also provides a heat insulation component 30, which is disposed between two adjacent battery cells 10 in a battery pack 100. The two adjacent battery cells 10 include a first battery cell 11 and a second battery cell 12 stacked along a first direction. That is, the heat insulation component 30 is disposed between the first battery cell 11 and the second battery cell 12, and the heat insulation component 30 is located between the first side 111 of the first battery cell 11 and the second side 121 of the second battery cell 12. The heat insulation component 30 includes a heat insulation body 31, a first protrusion 32 and a second protrusion 34. The first protrusion 32 is disposed on one side of the heat insulation body 31 along the first direction and is used to contact the first side 111 of the first battery cell 11. The second protrusion 34 is disposed on the other side of the heat insulation body 31 along the first direction and is used to contact the second side 121 of the second battery cell 12. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33, which is used to conduct heat from the first side 111 of the first battery cell 11 to the outside of the first battery cell 11 and the heat insulation member 30, thereby improving the heat dissipation efficiency of the first battery cell 11. The second protrusion 34 and the heat insulation body 31 form a second heat conduction channel 35, which is used to conduct heat from the second side 121 of the second battery cell 12 to the outside of the second battery cell 12 and the heat insulation member 30, thereby improving the heat dissipation efficiency of the second battery cell 12.

[0037] In one specific embodiment, the heat insulation body 31 includes a first surface 311 and a second surface 312 disposed opposite to each other along a first direction. The first surface 311 faces the first side surface 111 of the first battery cell 11, and the second surface 312 faces the second side surface 121 of the second battery cell 12. The heat insulation body 31 also contacts a condenser plate 20 located on one side of the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12. A first protrusion 32 protrudes from the first surface 311 of the heat insulation body 31 and is used to contact the first side surface 111 of the first battery cell 11. A second protrusion 34 protrudes from the second surface of the heat insulation body 31 and is used to contact the second side surface 121 of the second battery cell 12. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33, which can extend to the condenser plate 20 and is used to conduct heat from the first side surface 111 of the first battery cell 11 to the condenser plate 20. The second protrusion 34 and the heat insulation body 31 form a second heat conduction channel 35. The second heat conduction channel can extend to the condenser plate 20. The second heat conduction channel 35 is used to conduct the heat of the second side 121 of the second cell 12 to the condenser plate 20.

[0038] The heat insulation component 30 provided in this embodiment is disposed between the first battery cell 11 and the second battery cell 12. The first surface 311 of the heat insulation body 31 faces the first side 111 of the first battery cell 11, and the second surface 312 of the heat insulation body 31 faces the second side 121 of the second battery cell 12. A first protrusion 32 is provided on the first surface 311 of the heat insulation body 31, and the first protrusion 32 contacts the first side 111 of the first battery cell 11. A second protrusion 34 is provided on the second surface 312 of the heat insulation body 31, and the second protrusion 34 contacts the second side 121 of the second battery cell 12. The first protrusion 32 and the heat insulation body 31 form a first heat conduction channel 33, which can conduct the heat generated by the first battery cell 11 on the first side 111 to the outside of the first battery cell 11 and the heat insulation component 30 to achieve heat dissipation. The second protrusion 34 and the heat insulation body 31 form a second heat conduction channel 35. This second heat channel can conduct the heat generated by the second cell 12 on the second side 121 to the outside of the second cell 12 and the heat insulation component 30 for heat dissipation. Thus, the heat generated by the first cell 11 can be conducted to the outside of the first cell 11 and the heat insulation component 30 via the first side 111 and the first heat conduction channel 33 for heat dissipation, and the heat generated by the second cell 12 can be conducted to the outside of the first cell 11 and the heat insulation component 30 via the second side 121 and the second heat conduction channel 35 for heat dissipation. Compared to the traditional battery pack 100 where the cell 10 can only dissipate heat at the bottom, this method further improves the heat dissipation efficiency of the first cell 11 and the second cell 12, reduces the heat accumulation generated by the first cell 11 and the second cell 12, and thus improves the safety and operational stability of the battery pack 100 formed by the heat insulation component 30 in conjunction with the first cell 11 and the second cell 12.

[0039] In this embodiment, the first protrusion 32 and the second protrusion 34 on the heat insulation body 31 have the same structure. On the one hand, this makes the processing and manufacturing of the heat insulation component 30 more convenient and helps to improve the processing efficiency of the heat insulation component 30. On the other hand, the fact that the first protrusion 32 and the second protrusion 34 have the same structure makes the structure of the first heat channel and the second heat conduction channel 35 the same, so that the heat dissipation efficiency of the first battery cell 11 and the second battery cell 12 is the same, which helps to improve the overall heat dissipation uniformity of the battery pack 100.

[0040] It is understood that in some other embodiments, the structures of the first protrusion 32 and the second protrusion 34 on the heat insulation body 31 may be different, and this application does not limit this.

[0041] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6In one embodiment, the heat insulation body 31 has multiple first protrusions 32, each of which is used to contact the first side surface 111 of the first battery cell 11. The multiple first protrusions 32 and the heat insulation body 31 form multiple first heat conduction channels 33. Thus, by having multiple first protrusions 32 contact the first side surface 111 of the first battery cell 11, the contact between the heat insulation member 30 and the first battery cell 11 is made more stable. Furthermore, the multiple first protrusions 32 and the heat insulation body 31 form multiple first heat conduction channels 33, making the heat dissipation on the first side surface 111 of the first battery cell 11 more uniform. Correspondingly, the second protrusion 34 is configured in the same way as the first protrusion 32, and will not be described in detail here.

[0042] Understandably, in some other embodiments, only a portion of the plurality of first protrusions 32 may contact the first side 111 of the first battery cell 11, while another portion of the plurality of first protrusions 32 may be spaced apart from the first side 111 of the first battery cell 11, which can also dissipate heat from the first battery cell 11. This application does not limit this.

[0043] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 In one embodiment, the heat insulation body 31 of the heat insulation member 30 has a plurality of first protrusions 32, each of which is a strip-shaped structure extending along a second direction. Each first protrusion 32 extends along the second direction to both ends of the heat insulation body 31 along the second direction, and the plurality of first protrusions 32 are arranged sequentially at intervals along a third direction. The plurality of first protrusions 32 and the heat insulation body 31 form a plurality of first heat conduction channels 33, and the plurality of first heat conduction channels are arranged sequentially along a third direction. Any two adjacent first protrusions 32 and the heat insulation body 31 form a first heat conduction channel 33, each of which extends along the second direction and extends to the condenser plate 20 that contacts the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12. Therefore, since each first heat conduction channel 33 extends along the second direction and each first heat conduction channel 33 extends to the condenser plate 20 that contacts the first bottom surface 112 of the first battery cell 11 and the second bottom surface 122 of the second battery cell 12, the heat on the first side surface 111 of the first battery cell 11 can be conducted to the condenser plate 20 through multiple first heat conduction channels 33, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. Correspondingly, the arrangement of the second protrusion 34 is the same as that of the first protrusion 32, and will not be described in detail here. Among them, the third direction is as follows: Figure 1 The Y-axis direction is shown.

[0044] It is understood that in some other embodiments, the first protrusion 32 may be a strip structure of other shapes, and the first heat conduction channel 33 may be of other shapes, which can also achieve heat dissipation for the first battery cell 11. This application does not limit this.

[0045] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 Specifically, the first protrusion 32 is cuboid in shape, that is, the cross-section of the first protrusion 32 perpendicular to the second direction is rectangular, and the side of the first protrusion 32 away from the heat insulation body 31 forms a surface contact with the first side surface 111 of the first battery cell 11.

[0046] Understandably, in other embodiments, the first protrusion 32 may be frustum-shaped, that is, the cross-section of the first protrusion 32 perpendicular to the second direction is trapezoidal. The side of the first protrusion 32 away from the heat insulation body 31 may also form surface contact with the first side surface 111 of the first battery cell 11. This application does not limit this.

[0047] Please see Figure 1 , Figure 2 and Figure 7 , Figure 7 This is a structural diagram of another heat insulation component provided in one embodiment of this application.

[0048] In one embodiment, the side of the plurality of first protrusions 32 furthest from the heat insulation body 31 is linear, so that each first protrusion 32 forms a line contact with the first side surface 111 of the first battery cell 11. Therefore, the contact area between the first protrusion 32 and the first side surface 111 of the first battery cell 11 is smaller, the size of the first heat conduction channel 33 can be made larger, and the heat generated by the first battery cell 11 through the first side surface 111 can be more smoothly conducted to the condenser plate 20, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. Correspondingly, the arrangement of the second protrusion 34 is the same as that of the first protrusion 32, and will not be described in detail here.

[0049] Understandably, in some other embodiments, only a portion of the first protrusions 32 may have a linear structure on the side away from the heat insulation body 31, while the structure of the other portion of the first protrusions 32 is not limited. This can also allow a line contact to be formed between a portion of the first protrusions 32 and the first side surface 111 of the first battery cell 11, thereby reducing the contact area between the first protrusions 32 and the first side surface 111 of the first battery cell 11, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. This application does not impose any restrictions on this.

[0050] like Figure 7As shown, in one embodiment, all the first protrusions 32 are semi-cylindrical structures, meaning that the cross-section of the first protrusion 32 perpendicular to the second direction is semi-circular. On the side of the first protrusion 32 away from the heat insulation body 31, only the generatrix of the cylinder containing the semi-cylindrical part contacts the first side surface 111 of the first battery cell 11, i.e., a line contact is formed between the side of the first protrusion 32 away from the heat insulation body 31 and the first side surface 111 of the first battery cell 11. Therefore, the contact area between the first protrusion 32 and the first side surface 111 of the first battery cell 11 is smaller, the size of the first heat conduction channel 33 can be made larger, and the heat generated by the first battery cell 11 through the first side surface 111 can be more smoothly conducted to the condenser plate 20, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11.

[0051] Understandably, in some other embodiments, only a portion of the first protrusions 32 are semi-cylindrical in structure, while the structure of the other portion of the first protrusions 32 is not limited. This can also allow a line contact to be formed between a portion of the first protrusions 32 and the first side surface 111 of the first battery cell 11, thereby reducing the contact area between the first protrusions 32 and the first side surface 111 of the first battery cell 11, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. This application does not impose any restrictions on this.

[0052] Please see Figure 7 Specifically, multiple first protrusions 32 are spaced apart from the edge of the heat insulation body 31 near the condenser plate 20, forming a first connecting channel 36 on the side of the heat insulation body 31 near the condenser plate 20. The first connecting channel 36 extends in a third direction, communicating with multiple first heat conduction channels 33 on one side in a second direction, and contacting the condenser plate 20 on the other side in the second direction. Thus, the arrangement of the first connecting channel 36 indirectly increases the contact area between the multiple first heat conduction channels 33 and the condenser plate 20, which is beneficial to improving the heat exchange efficiency between the first heat conduction channels 33 and the condenser plate 20, thereby improving the heat dissipation efficiency of the first battery cell 11.

[0053] Understandably, in some other embodiments, the first protrusion 32 may be triangular in shape, that is, the cross-section of the first protrusion 32 perpendicular to the second direction is triangular. The side of the first protrusion 32 away from the heat insulation body 31 may also form a line contact with the first side surface 111 of the first battery cell 11. This application does not limit this.

[0054] Please see Figure 1 , Figure 2 , Figure 8 and Figure 9 , Figure 8 This is a structural diagram of another heat insulation component provided in an embodiment of this application. Figure 9 yes Figure 8The front and top views of the insulation component are shown.

[0055] In one embodiment, multiple first protrusions 32 extend along a second direction to the edge of the heat insulation body 31 near the condenser plate 20, and multiple first heat conduction channels 33 directly contact the condenser plate 20. Two adjacent first protrusions 32 and the heat insulation body 31 form a first heat conduction channel 33, each of which includes a first segment 331 and a second segment 332 connected in the second direction. In the third direction, the dimension of the end of the first segment 331 away from the second segment 332 is larger than the dimension of the second segment 332 away from the first segment 331. The end of the first segment 331 away from the second segment 332 is closer to the condenser plate 20 of the battery pack 100 than the end of the second segment 332 away from the first segment 331, thus increasing the contact area between the condenser plate 20 and the first heat conduction channel 33. Therefore, the first heat conduction channel 33 has a larger dimension at one end and a smaller dimension at the other, which increases the contact area between the first heat conduction channel 33 and the condenser plate 20, improving heat exchange between them and thus enhancing the heat dissipation efficiency of the first battery cell 11. Correspondingly, the second protrusion 34 is configured the same as the first protrusion 32, and will not be described in detail here.

[0056] It is understood that in some other embodiments, only a portion of the multiple first heat conduction channels 33 may include the first segment 331 and the second segment 332 connected in the second direction, while the structure of the other portion of the heat conduction channel 33 is not limited. This can also increase the contact area between the condenser plate 20 and the first heat conduction channel 33, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. This application does not impose any restrictions on this.

[0057] Please see Figure 1 , Figure 2 , Figure 8 and Figure 9Specifically, in the third direction, the dimension of the end of the first segment 331 furthest from the second segment 332 is greater than the dimension of the second segment 332 furthest from the first segment 331. The end of the first segment 331 furthest from the second segment 332 is closer to the condenser plate 20 of the battery pack 100 relative to the end of the second segment 332 furthest from the first segment 331. In the second direction, the length of the first segment 331 is less than the length of the second segment 332. Moreover, the dimension of the first segment 331 furthest from the second segment 332 gradually decreases from the point where the first segment 331 connects with the second segment 332, and the dimension of the first segment 331 furthest from the second segment 332 gradually increases from the point where the first segment 331 connects with the second segment 332 furthest from the first segment 331. Thus, the first heat-conducting channel 33 forms a Laval nozzle structure. According to the working principle of the Laval nozzle structure, when the first battery cell 11 heats up, the heat from the first battery cell 11 enters the first heat conduction channel 33 through the first side 111. Since the first section 331 of the first heat conduction channel 33 is in contact with the condenser plate 20, the hot air in the first section 331 of the first heat conduction channel 33 will flow to the second section 332, and the flow velocity of the hot air from the first section 331 to the second section 332 will increase along the direction from the first section 331 to the second section 332, so that the heat dissipation effect between the first battery cell 11 and the heat insulation member 30 will be better. Correspondingly, the arrangement of the second protrusion 34 is the same as that of the first protrusion 32, and will not be described in detail here.

[0058] Please see Figure 1 , Figure 2 , Figure 10 and Figure 11 , Figure 10 This is a structural diagram of another heat insulation component provided in an embodiment of this application. Figure 11 yes Figure 10 The front and top views of the insulation component are shown.

[0059] In one embodiment, a plurality of first protrusions 32 of the heat insulation member 30 are arrayed on the first surface 311 of the heat insulation body 31, that is, some of the protrusions are arranged at intervals in a second direction, and other parts of the first protrusions 32 are arranged at intervals in a third direction. By arraying the plurality of first protrusions 32 on the first surface 311 of the heat insulation body 31, the first heat conduction channel 33 formed by the plurality of first protrusions 32 and the heat insulation body 31 is in a grid pattern. The grid pattern of the first heat conduction channel 33 can increase the contact area between the first heat conduction channel 33 and the first side surface 111 of the first battery cell 11, which is beneficial to improving the heat exchange efficiency between the first heat conduction channel 33 and the condenser plate 20, thereby improving the heat dissipation efficiency of the first battery cell 11. Correspondingly, the arrangement of the second protrusion 34 is the same as that of the first protrusion 32, and will not be described in detail here.

[0060] Please see Figure 1 , Figure 2 , Figure 10 and Figure 11 Specifically, each first protrusion 32 has a point-like structure on the side away from the heat insulation body 31, so that each first protrusion 32 forms a point contact with a battery cell 10. Therefore, the contact area between the first protrusion 32 and the first side surface 111 of the first battery cell 11 is smaller, and the size of the first heat conduction channel 33 can be made larger. That is, the contact area between the first heat conduction channel 33 and the first side surface 111 of the first battery cell 11 is larger, and the heat generated by the first battery cell 11 through the first side surface 111 can be more smoothly conducted to the condenser plate 20. The heat exchange efficiency between the first heat conduction channel 33 and the condenser plate 20 is higher, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. Correspondingly, the arrangement of the second protrusion 34 is the same as that of the first protrusion 32, and will not be described in detail here.

[0061] Understandably, in some other embodiments, only a portion of the first protrusions 32 may have a dotted structure on the side away from the heat insulation body 31, while the structure of the other portion of the first protrusions 32 is not limited. This can also allow some of the first protrusions 32 to form point contact with the first side surface 111 of the first battery cell 11, thereby reducing the contact area between the first protrusions 32 and the first side surface 111 of the first battery cell 11, which is beneficial to improving the heat dissipation efficiency of the first battery cell 11. This application does not impose any restrictions on this.

[0062] Please see Figure 1 , Figure 2 , Figure 10 and Figure 11 More specifically, in this embodiment, the first protrusion 32 has a hemispherical structure, meaning that the cross-section of the first protrusion 32 perpendicular to the second direction is semi-circular, and the orthographic projection of the first protrusion 32 onto the heat insulation body 31 is circular. Only one point on the hemispherical side of the first protrusion 32 away from the heat insulation body 31 contacts the first side surface 111 of the first battery cell 11, forming a point contact. Therefore, the contact area between the first protrusion 32 and the first side surface 111 of the first battery cell 11 is smaller, allowing for a larger size of the first heat conduction channel 33. The heat generated by the first battery cell 11 through the first side surface 111 can be more smoothly conducted to the condenser plate 20, resulting in higher heat exchange efficiency between the first heat conduction channel 33 and the condenser plate 20, which further improves the heat dissipation efficiency of the first battery cell 11.

[0063] It is understood that in some other embodiments, the first protrusion 32 may be in the shape of a pyramid or other arc-shaped protrusion, and the side of the first protrusion 32 away from the heat insulation body 31 may also form point contact with the first side surface 111 of the first battery cell 11. This application does not limit this.

[0064] The above are some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A heat insulation component (30), characterized in that, For use in at least one side of a cell (10) disposed in a battery pack (100), including: The heat insulation body (31) includes a first surface (311) and a second surface (312) disposed opposite to each other along a first direction, the first surface (311) facing the battery cell (10); The first protrusion (32) is provided on the first surface (311) and is used to contact the battery cell (10); the first protrusion (32) and the heat insulation body (31) form a first heat conduction channel (33).

2. The heat insulation component (30) as described in claim 1, characterized in that, The heat insulation element is used to be disposed between two adjacent cells (10) of the battery pack (100); The first surface (311) faces one of the battery cells (10), and the second surface (312) faces the other battery cell (10); the first protrusion (32) is used to contact one of the battery cells (10); The heat insulation component (30) further includes a second protrusion (34), which protrudes from the second surface (312) and is used to contact another of the battery cells (10); the second protrusion (34) and the heat insulation body (31) form a second heat conduction channel (35).

3. The heat insulation component (30) as described in claim 1, characterized in that, The number of the first protrusions (32) is multiple, and the multiple first protrusions (32) and the heat insulation body (31) form multiple first heat conduction channels (33).

4. The heat insulation component (30) as described in claim 3, characterized in that, Each of the first protrusions (32) extends along the second direction to both ends of the heat insulation body (31), and a plurality of the first protrusions (32) are arranged at intervals along the third direction; two adjacent first protrusions (32) and the heat insulation body (31) form a first heat conduction channel (33); wherein, the second direction is different from the first direction, the third direction is different from the first direction, and the third direction is also different from the second direction.

5. The heat insulation component (30) as described in claim 4, characterized in that, At least one of the first heat conduction channels (33) includes a first segment (331) and a second segment (332) connected in the second direction; In the third direction, the dimension of the end of the first segment (331) away from the second segment (332) is greater than the dimension of the second segment (332) away from the first segment (331).

6. The heat insulation component (30) as described in claim 5, characterized in that, In the second direction, the length of the first segment (331) is less than the length of the second segment (332).

7. The heat insulation component (30) as described in claim 6, characterized in that, The size of the first segment (331) from the end away from the second segment (332) to the point where the first segment (331) and the second segment (332) connect gradually decreases, and the size of the second segment (332) from the point where the first segment (331) and the second segment (332) connect to the point where the second segment (332) is away from the first segment (331) gradually increases.

8. The heat insulation member (30) as described in any one of claims 3 to 7, characterized in that, At least one of the first protrusions (32) has a linear structure on the side away from the heat insulation body (31) so that at least one of the first protrusions (32) forms a line contact with one of the battery cells (10).

9. The heat insulation member (30) as described in any one of claims 3 to 7, characterized in that, A plurality of first protrusions (32) are arrayed on the first surface (311) of the heat insulation body (31), and the first heat conduction channel (33) formed by the plurality of first protrusions (32) and the heat insulation body (31) is in a grid shape.

10. The heat insulation member (30) as claimed in claim 9, characterized in that, At least one of the first protrusions (32) has a dotted structure on the side away from the heat insulation body (31) so that at least one of the first protrusions (32) forms a point contact with one of the battery cells (10).

11. A battery pack (100), characterized in that, include: Battery cell (10); The heat insulation member (30) as described in any one of claims 1-10 is disposed on one side of the battery cell (10), and the first protrusion (32) of the heat insulation member (30) is in contact with the battery cell (10).

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