Battery heat dissipation device and new energy automobile
By setting a thermal conductivity structure and a phase change structure on the side of the battery cell, the problem of insufficient heat dissipation of the battery cell is solved, and a larger area of heat dissipation and battery storage space are achieved.
Patent Information
- Application Number
- CN202422243742.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-12
AI Technical Summary
In the prior art, the arrangement of the cold plate on the bottom surface of the battery cell causes insufficient heat dissipation on the large and side surfaces of the battery cell, and a large heat dissipation area is lost. The arrangement of the cold plate on the large and side surfaces of the battery cell will reduce the storage space of the battery pack.
The thermally conductive structure is used to wrap the sides of the single-body battery cell, and a phase change structure is set outside the thermally conductive structure. The phase change structure is fixed on the heat dissipation component, and heat is quickly transferred to the phase change structure through the thermally conductive structure, and then transferred to the heat dissipation component from the phase change structure to dissipate heat.
It improves the heat dissipation efficiency of the battery module, expands the heat dissipation area, and avoids the reduction of the battery storage space.
Smart Images
Figure CN223123977U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power batteries, and in particular, to a battery heat dissipation device and a new energy vehicle. Background Art
[0002] In the power battery heat dissipation technology, generally, a cold plate is arranged in the bottom area of the battery cell, so that when the battery generates heat, it is dissipated through the cold plate in contact with the bottom of the battery cell.
[0003] However, through the research of the inventor, it is found that since the cold plate is only arranged on the bottom surface of the battery cell, heat dissipation cannot be carried out on the large surface and the side surface of the battery cell, resulting in a large loss of heat dissipation area and an unsatisfactory heat dissipation efficiency. If cold plates are arranged on the large surface and the side surface of the battery cell, the accommodation space of the battery cells in the battery pack is greatly reduced. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a battery heat dissipation device and a new energy vehicle, which can at least partially solve the above technical problems.
[0005] In a first aspect, the utility model provides a battery heat dissipation device, which includes a heat dissipation component and a heat conduction component; the heat conduction component includes a heat conduction structure and a phase change structure;
[0006] Both ends of the heat conduction structure are open, and the single battery cells of the battery module are arranged in the heat conduction structure; the shape and size of the heat conduction structure are adapted to the shape and size of the single battery cell, and the conductive surface of the single battery cell is located at one open end of the heat conduction structure; wherein, the conductive surface is the surface where the electrode plate of the single battery cell is located;
[0007] One surface of the phase change structure is closely attached to the outer surface of the heat conduction structure, and the other surface is fixed on the heat dissipation component.
[0008] Optionally, the phase change structure is a hollow "L"-shaped flat tube, and a phase change material is sealed in the phase change structure.
[0009] Optionally, the phase change structure includes a first phase change flat tube; two inner side surfaces of the first phase change flat tube are respectively closely attached to two adjacent side surfaces of the heat conduction structure;
[0010] Two first phase change flat tubes are arranged on each heat conduction structure, and the two first phase change flat tubes are closely attached to three adjacent outer side surfaces of the heat conduction structure in an axisymmetric manner.
[0011] Optionally, the single battery cells in the battery module are arranged in such a way that the first side surfaces of every two adjacent single battery cells face each other and the conductive surfaces are located on the same side; the first side surface is two opposite side surfaces of the single battery cell perpendicular to the conductive surface;
[0012] The phase change structure further includes a second phase change flat tube; the shape of the second phase change flat tube is the same as that of the first phase change flat tube;
[0013] One inner side of the second phase change flat tube is disposed closely against the surface of the single cell opposite to the conductive surface, and the other inner side of the second phase change flat tube is disposed closely against the outer surface of the heat conduction structure opposite to the second side of the single cell; the second side is two sides adjacent to the first side on the single cell.
[0014] Optionally, the heat dissipation component includes a cold plate and a connecting member, and the cold plate includes an inlet liquid plate and an outlet liquid plate;
[0015] The inlet liquid plate and the outlet liquid plate are arranged in parallel, and one side of the inlet liquid plate is fixed to the outer side of the first phase change flat tube disposed on the second side;
[0016] One side of the outlet liquid plate is fixed to the outer side of the second phase change flat tube disposed on the second side;
[0017] The connecting member is respectively connected to the liquid outlet end of the inlet liquid plate and the liquid inlet end of the outlet liquid plate.
[0018] Optionally, the heat dissipation component further includes a current collecting plate, and the current collecting plate includes a first current collecting plate and a second current collecting plate;
[0019] The first current collecting plate is connected to the liquid inlet end of the inlet liquid plate, and the second current collecting plate is connected to the liquid outlet end of the outlet liquid plate.
[0020] Optionally, the cold plate is a harmonica flat tube.
[0021] Optionally, the thickness of the phase change structure is 1.5 - 3 mm, and the width is 20 - 60 mm.
[0022] Optionally, the material of the heat conduction structure is graphene.
[0023] In a second aspect, the present invention provides a new energy vehicle, and the new energy vehicle includes the battery heat dissipation device according to any one of the above.
[0024] The beneficial effects of the battery heat dissipation device and the new energy vehicle provided by the present invention are:
[0025] By arranging a heat conduction structure that wraps the single-cell battery core and arranging a phase change structure outside the heat conduction structure, the phase change structure is fixed on the heat dissipation component. When the battery core generates heat during operation, the heat can be quickly transferred to the phase change structure through the heat conduction structure, and then the phase change structure transfers the heat to the heat dissipation component for heat dissipation. Since the heat conduction structure wraps the side surfaces (including the large surfaces) of the single-cell battery core, the heat dissipation component can have a larger heat dissipation area, improving the heat dissipation efficiency of the battery module. Brief Description of the Drawings
[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0027] Figure 1 Exploded schematic diagram of the battery heat dissipation device provided by the embodiment of the present invention;
[0028] Figure 2 Schematic diagram of the phase change structure provided by the embodiment of the present invention;
[0029] Figure 3 Schematic diagram of the first phase change flat tube provided by the embodiment of the present invention;
[0030] Figure 4 Schematic diagram of the second phase change flat tube provided by the embodiment of the present invention;
[0031] Figure 5 Schematic diagram of the heat dissipation component provided by the embodiment of the present invention.
[0032] Reference Signs: 01 - Battery heat dissipation device; 10 - Single-cell battery core; 101 - Conductive surface; 102 - First side surface; 103 - Second side surface; 11 - Heat dissipation component; 12 - Heat conduction component; 121 - Heat conduction structure; 122 - Phase change structure; 1221 - First phase change flat tube; 1222 - Second phase change flat tube; 111 - Cold plate; 1111 - Liquid inlet plate; 1112 - Liquid outlet plate; 112 - Connecting piece; 113 - Current collecting plate; 1131 - First current collecting plate; 1132 - Second current collecting plate. Detailed Embodiments
[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated herein generally may be arranged and designed in a variety of different configurations.
[0034] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but is merely representative of selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without any creative work shall fall within the scope of protection of the present utility model.
[0035] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.
[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.
[0037] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.
[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0039] Please refer to Figure 1, this embodiment provides a battery heat dissipation device 01, and the battery heat dissipation device 01 includes a heat dissipation component 11 and a heat conduction component 12. The heat conduction component 12 includes a heat conduction structure 121 and a phase change structure 122.
[0040] Both ends of the heat conduction structure 121 are open, and the single cell 10 of the battery module is disposed inside the heat conduction structure 121. The shape and size of the heat conduction structure 121 are adapted to the shape and size of the single cell 10, and the conductive surface 101 of the single cell 10 is located at one open end of the heat conduction structure 121. Wherein, the conductive surface 101 is the surface where the electrode plate of the single cell 10 is located.
[0041] One side of the phase change structure 122 is disposed closely against the outer surface of the heat conduction structure 121, and the other side is fixed on the heat dissipation component 11.
[0042] As Figure 1 shown, the heat conduction structure 121 can be a two-end open structure that wraps the side surface of the single cell 10 and leaves the bottom surface and the conductive surface 101 of the single cell 10. Such a setting can absorb all the heat dissipated from the four side surfaces of the single cell 10 onto the heat conduction structure 121. The phase change structure 122 that is closely attached to the heat conduction structure 121 is provided on the heat conduction structure 121. Since the specific heat capacity of the phase change material of the phase change structure 122 is greater than that of the heat conduction structure 121, the heat conducted to the heat conduction structure 121 can be transferred to the phase change structure 122. The other side of the phase change structure 122 is fixed on the heat dissipation component 11, so that the heat absorbed by the phase change material can be better transferred into the heat dissipation component 11, and the heat generated by the single cell 10 is dissipated through the heat dissipation component 11.
[0043] Optionally, the phase change structure 122 is a hollow "L"-shaped flat tube, and a phase change material is sealed in the phase change structure 122.
[0044] As Figure 2 shown, it is a cross-sectional view of the phase change structure 122. The phase change structure 122 can be designed as a hollow and sealed metal flat tube, and the phase change material is sealed in the metal flat tube. Its size can be designed according to the size of the single cell 10. In order to enable the phase change structure 122 to be better fixed on the heat dissipation component 11, the material of the metal flat tube can be the same as the material at the position where the phase change structure 122 is fixed on the heat dissipation component 11. In addition, the phase change structure 122 can also be fixed on the heat dissipation component 11 by using a heat-conducting adhesive.
[0045] Optionally, the phase change structure 122 includes a first phase change flat tube 1221. The two inner side surfaces of the first phase change flat tube 1221 are respectively disposed closely against two adjacent side surfaces of the heat conduction structure 121.
[0046] Two of the first phase change flat tubes 1221 are provided on each of the heat conduction structures 121, and the two first phase change flat tubes 1221 are arranged in an axisymmetric manner and closely attached to three adjacent outer side surfaces of the heat conduction structure 121.
[0047] As Figure 3 shown, in order to better absorb the heat generated by the single cell 10, the two inner side surfaces of the "L"-shaped metal flat tube can be respectively attached to two adjacent side surfaces of the heat conduction structure 121. By providing two first phase change flat tubes 1221, the two first phase change flat tubes 1221 can be arranged in an axisymmetric manner and closely attached to three adjacent outer side surfaces of the heat conduction structure 121 in the manner Figure 3 shown, so as to absorb the heat generated by the single cell 10 with a larger area.
[0048] Optionally, the single cells 10 in the battery module are arranged in such a way that the first side surfaces 102 of every two adjacent single cells 10 face each other and the conductive surfaces 101 are located on the same side. The first side surface 102 is two opposite side surfaces of the single cell 10 perpendicular to the conductive surface 101.
[0049] The phase change structure 122 further includes a second phase change flat tube 1222. The shape of the second phase change flat tube 1222 is the same as that of the first phase change flat tube 1221.
[0050] One inner side surface of the second phase change flat tube 1222 is closely attached to the surface of the single cell 10 opposite to the conductive surface 101, and the other inner side surface of the second phase change flat tube 1222 is closely attached to the outer surface of the heat conduction structure 121 opposite to the second side surface 103 of the single cell 10. The second side surface 103 is two side surfaces of the single cell 10 adjacent to the first side surface 102.
[0051] As Figure 4 shown, the four side surfaces of the single cell 10 can be divided into the first side surface 102 and the second side surface 103. When arranging multiple single cells 10, the single cells 10 are arranged in such a way that the first side surfaces 102 of every two adjacent single cells 10 face each other and the conductive surfaces 101 are located on the same side. In this way, the first phase change flat tube 1221 can simultaneously absorb the heat dissipated from the first side surfaces 102 of two adjacent single cells 10.
[0052] To further dissipate the heat of the battery module, two second-phase change flat tubes 1222 can also be provided for each single battery cell 10. One inner side of the second-phase change flat tube 1222 is arranged closely against the surface of the single battery cell 10 opposite to the conductive surface 101. The other inner side of the second-phase change flat tube 1222 is arranged closely against the outer surface of the heat conduction structure 121 opposite to the two second side surfaces 103 adjacent to the first side surface 102 of the single battery cell 10. This enables the phase change structure 122 to absorb heat over a larger area, so as to better transfer the heat to the heat dissipation component 11 for heat dissipation.
[0053] Optionally, the heat dissipation component 11 includes a cold plate 111 and a connecting member 112. The cold plate 111 includes an inlet plate 1111 and an outlet plate 1112.
[0054] The inlet plate 1111 and the outlet plate 1112 are arranged in parallel. One surface of the inlet plate 1111 is fixed to the outer side surface of the first-phase change flat tube 1221 arranged on the second side surface 103.
[0055] One surface of the outlet plate 1112 is fixed to the outer side surface of the second-phase change flat tube 1222 arranged on the second side surface 103. The connecting member 112 is respectively connected to the liquid outlet end of the inlet plate 1111 and the liquid inlet end of the outlet plate 1112.
[0056] As Figure 5 shown, when the single battery cells 10 are arranged to form a battery module, an outlet plate 1112 and an inlet plate 1111 can be provided at both second side surfaces 103 of each single battery cell 10, and the first-phase change flat tube 1221 and the second-phase change flat tube 1222 are fixed to the outlet plate 1112 and the inlet plate 1111. The inlet plate 1111 and the outlet plate 1112 are connected by the connecting member 112, so that the coolant can circulate in the cold plate 111 to take away the heat generated by the battery module.
[0057] Optionally, the heat dissipation component 11 further includes a manifold plate 113. The manifold plate 113 includes a first manifold plate 1131 and a second manifold plate 1132. The first manifold plate 1131 is connected to the liquid inlet end of the inlet plate 1111, and the second manifold plate 1132 is connected to the liquid outlet end of the outlet plate 1112.
[0058] Still taking Figure 5 as an example, to facilitate the introduction of the coolant into the cold plate 111, a manifold plate 113 including a first manifold plate 1131 and a second manifold plate 1132 can be provided. The first manifold plate 1131 is connected to the liquid inlet end of the inlet plate 1111, and the second manifold plate 1132 is connected to the liquid outlet end of the outlet plate 1112 to enable the flow of the coolant in the cold plate 111.
[0059] Optionally, the cold plate 111 is a harmonica flat tube. The harmonica flat tube has a certain strength and is a hollow structure, which can be used as the material of the cold plate 111.
[0060] Optionally, the thickness of the phase change structure 122 is 1.5 - 3 mm, and the width is 20 - 60 mm.
[0061] In actual situations, the size of the phase change structure 122 can be changed according to the capacity of the battery pack, the size of the single cell 10, etc. The present utility model does not make specific limitations in this regard. The above are only the preferred implementation parameters provided by the present utility model.
[0062] Optionally, the material of the heat conduction structure 121 is graphene. Graphene has an ultra-high heat conduction rate and also has a certain hardness. Therefore, graphene can be selected as the material of the heat conduction structure 121. It can not only effectively protect the single cell 10, but also improve the heat transfer efficiency.
[0063] Based on the same inventive concept, the present utility model provides a new energy vehicle, which includes the battery heat dissipation device 01 described in any one of the above.
[0064] Regarding the above new energy vehicle, the specific functions and structures of each part have been described in detail in the embodiments of the battery heat dissipation device 01 provided in this specification, and will not be elaborated here.
[0065] The above solutions in the embodiments of the present utility model at least include the following technical effects:
[0066] By providing a heat conduction structure that wraps the single cell and arranging a phase change structure outside the heat conduction structure, the phase change structure is fixed on the heat dissipation component. When the cell generates heat during operation, the heat can be quickly transferred to the phase change structure through the heat conduction structure, and then the phase change structure transfers the heat to the heat dissipation component for heat dissipation. Since the heat conduction structure wraps the side surfaces (including the large surfaces) of the single cell, the heat dissipation component 11 can have a larger heat dissipation area, improving the heat dissipation efficiency of the battery module.
[0067] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A battery heat dissipation device, characterized in that, The battery heat dissipation device (01) includes a heat dissipation component (11) and a heat conduction component (12); the heat conduction component (12) includes a heat conduction structure (121) and a phase change structure (122); The heat conduction structure (121) has openings at both ends, and the single cells (10) of the battery module are arranged inside the heat conduction structure (121); the shape and size of the heat conduction structure (121) are adapted to the shape and size of the single cells (10), and the conductive surface (101) of the single cells (10) is located at the opening at one end of the heat conduction structure (121); wherein, the conductive surface (101) is the surface where the electrode plates of the single cells (10) are located; One side of the phase change structure (122) is disposed closely against the outer surface of the heat conduction structure (121), and the other side is fixed to the heat dissipation component (11).
2. The battery heat dissipation device according to claim 1, wherein The phase change structure (122) is a hollow "L"-shaped flat tube, and a phase change material is sealed in the phase change structure (122).
3. The battery heat dissipation device according to claim 2, wherein, The phase change structure (122) includes a first phase change flat tube (1221); two inner sides of the first phase change flat tube (1221) are respectively disposed closely against two adjacent sides of the heat conduction structure (121); Two of the first phase change flat tubes (1221) are disposed on each of the heat conduction structures (121), and the two first phase change flat tubes (1221) are disposed closely against three adjacent outer sides of the heat conduction structure (121) in an axisymmetric manner.
4. The battery heat dissipation device according to claim 3, wherein The single cells (10) in the battery module are arranged in such a way that the first sides (102) of every two adjacent single cells (10) face each other and the conductive surfaces (101) are located on the same side; the first side (102) is two opposite sides of the single cells (10) perpendicular to the conductive surface (101); The phase change structure (122) further includes a second phase change flat tube (1222); the shape of the second phase change flat tube (1222) is the same as the shape of the first phase change flat tube (1221); One inner side of the second phase change flat tube (1222) is disposed closely against the surface of the single cell (10) opposite to the conductive surface (101), and the other inner side of the second phase change flat tube (1222) is disposed closely against the outer surface of the heat conduction structure (121) opposite to the second side (103) of the single cell (10); the second side (103) is two sides of the single cell (10) adjacent to the first side (102).
5. The battery heat dissipation device according to claim 4, wherein The heat dissipation component (11) includes a cold plate (111) and a connecting member (112), and the cold plate (111) includes a liquid inlet plate (1111) and a liquid outlet plate (1112); The liquid inlet plate (1111) and the liquid outlet plate (1112) are arranged in parallel, and one side of the liquid inlet plate (1111) is fixed to the outer surface of the first phase change flat tube (1221) disposed on the second side (103); One side of the liquid outlet plate (1112) is fixed to the outer surface of the second phase change flat tube (1222) disposed on the second side (103); The connecting member (112) is respectively connected to the liquid outlet end of the liquid inlet plate (1111) and the liquid inlet end of the liquid outlet plate (1112).
6. The battery heat dissipation device according to claim 5, characterized in that, The heat dissipation assembly (11) further includes a manifold plate (113), and the manifold plate (113) includes a first manifold plate (1131) and a second manifold plate (1132); The first manifold plate (1131) is connected to the liquid inlet end of the liquid inlet plate (1111), and the second manifold plate (1132) is connected to the liquid outlet end of the liquid outlet plate (1112).
7. The battery heat dissipation device according to any one of claims 5 or 6, characterized in that, The cold plate (111) is a flat tube of a harmonica shape.
8. The battery heat dissipation device according to any one of claims 1 to 4, characterized in that The phase change structure (122) has a thickness of 1.5 to 3 mm and a width of 20 to 60 mm.
9. The battery heat dissipation device according to claim 1, characterized in that, The material of the heat conduction structure (121) is graphene.
10. A new energy vehicle, characterized in that, The new energy vehicle includes the battery heat dissipation device (01) according to any one of claims 1 to 9.