Cylindrical battery heat dissipation device and cylindrical battery module

Abstract

The utility model provides a kind of cylindrical battery heat sink and cylindrical battery module.The cylindrical battery heat sink includes: heat conduction component, including the first heat conduction part and the second heat conduction part of split setting, first heat conduction part includes first straight section and first straight cylinder section, first straight cylinder section has first accommodating cavity, first accommodating cavity is structured as allowing the top of cylindrical battery to be embedded, the bottom wall of first accommodating cavity and the top surface of cylindrical battery form heat conduction contact;Second heat conduction part includes second straight section and second straight cylinder section, second straight cylinder section has second accommodating cavity, second accommodating cavity is structured as allowing the bottom of cylindrical battery to be embedded, the bottom wall of second accommodating cavity and the bottom surface of cylindrical battery form heat conduction contact, the bottom wall of first straight cylinder section and the bottom wall of second straight cylinder section are all built-in first cooling liquid flow channel.The technical scheme of the utility model can solve the problem of low heat dissipation efficiency of the existing heat dissipation structure for cylindrical battery heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a cylindrical battery heat dissipation device and a cylindrical battery module. Background Technology

[0002] Cylindrical batteries are widely favored in applications such as electric vehicles, energy storage systems, and portable electronic devices due to their high energy density, cost-effectiveness, and mature manufacturing technology. However, cylindrical batteries generate a significant amount of heat during high-power, high-frequency charging and discharging. If this heat is not dissipated effectively and promptly, the battery temperature will become excessively high, affecting battery performance, lifespan, and even causing safety issues. To address the heat dissipation problem of cylindrical batteries, existing technologies primarily employ air cooling and liquid cooling. Among these, liquid cooling, due to its high cooling efficiency and precise temperature control, has become the preferred technology for cylindrical battery heat dissipation solutions.

[0003] Chinese patent 202321330469.2 discloses a cylindrical battery module. This module utilizes liquid cooling pipes fitted onto each cylindrical cell, with heat exchange chambers within the pipe walls surrounding the outer circumference of the cells. The coolant flowing within these chambers ensures full contact with the entire circumference of the cells, achieving highly efficient heat dissipation. However, this heat dissipation method cools the outer surface of the cylindrical battery. Since the axial thermal conductivity of a cylindrical battery is much higher than its radial thermal conductivity, this side-cooling method results in relatively low heat dissipation efficiency. Utility Model Content

[0004] The main objective of this invention is to provide a cylindrical battery heat dissipation device and a cylindrical battery module, which can solve the problem of low heat dissipation efficiency when using existing heat dissipation structures to cool cylindrical batteries.

[0005] To achieve the above objectives, according to one aspect of the present invention, a cylindrical battery heat dissipation device is provided, comprising: a heat-conducting assembly including a first heat-conducting element and a second heat-conducting element separately disposed, the first heat-conducting element and the second heat-conducting element being spaced apart along a first direction; the first heat-conducting element including a first straight section and a first cylindrical section, the first cylindrical section being connected to the side of the first straight section facing the second heat-conducting element; the first cylindrical section having a first receiving cavity; the first receiving cavity being configured to allow the top of the cylindrical battery to be embedded; the bottom wall of the first receiving cavity forming a thermally conductive contact with the top surface of the cylindrical battery; the second heat-conducting element including a second straight section and a second cylindrical section, the second cylindrical section being connected to the side of the second straight section facing the first heat-conducting element; the second cylindrical section having a second receiving cavity; the second receiving cavity being configured to allow the bottom of the cylindrical battery to be embedded; the bottom wall of the second receiving cavity forming a thermally conductive contact with the bottom surface of the cylindrical battery; and both the bottom walls of the first cylindrical section and the bottom walls of the second cylindrical section having built-in first coolant channels.

[0006] Furthermore, the first straight section has a built-in second coolant flow channel, which is connected to the first coolant flow channel of the first straight section; and / or, the second straight section has a built-in third coolant flow channel, which is connected to the first coolant flow channel of the second straight section.

[0007] Furthermore, the first heat-conducting component also includes a first liquid inlet and a first liquid outlet, the first liquid inlet being disposed on the first straight section and / or the first flat section, and the first liquid outlet being disposed on the first straight section and / or the first flat section. The second heat-conducting component also includes a second liquid inlet and a second liquid outlet, the second liquid inlet being disposed on the second straight section and / or the second flat section, and the second liquid outlet being disposed on the second straight section and / or the second flat section.

[0008] Furthermore, the length of the first cylindrical section is L1, the length of the second cylindrical section is L2, and the height of the cylindrical battery is H. The three satisfy the relationship: H=k1×(L1+L2), and the value of k1 is in the range of 5≤k1≤8.

[0009] Furthermore, the thickness of the first and second cylindrical sections is T1, and the diameter of the cylindrical battery is D. The two satisfy the relationship: T1 / D=k2, and the value range is 0.12≤k2≤0.15.

[0010] Furthermore, the portion of the cylindrical battery located in the first receiving cavity is adapted to the inner wall of the first receiving cavity, and thermally conductive adhesive is filled between the portion of the cylindrical battery located in the first receiving cavity and the inner wall of the first receiving cavity; the portion of the cylindrical battery located in the second receiving cavity is adapted to the inner wall of the second receiving cavity, and thermally conductive adhesive is filled between the portion of the cylindrical battery located in the second receiving cavity and the inner wall of the second receiving cavity.

[0011] Furthermore, there are multiple first cylindrical sections, which are spaced apart along the length of the first straight section; and / or, the sidewall of the first receiving cavity forms a thermally conductive contact with the side of the cylindrical battery, and the sidewall of the second receiving cavity forms a thermally conductive contact with the side of the cylindrical battery.

[0012] Furthermore, the first cylindrical section is provided with a first opening communicating with the first receiving cavity, and the first opening is configured to form a connection channel for electrically connecting the conductive busbar and the cylindrical battery.

[0013] Furthermore, the bottom of the second cylindrical section is provided with a second opening that communicates with the second receiving cavity, and the bottom of the cylindrical battery is provided with an explosion-proof valve. The second opening is configured to correspond to the explosion-proof valve.

[0014] According to another aspect of the present invention, a cylindrical battery module is provided, comprising: a cylindrical battery heat dissipation device as described above, and multiple heat-conducting components; multiple cylindrical batteries, wherein the multiple cylindrical batteries and the multiple heat-conducting components are arranged in a one-to-one correspondence, and in two adjacent cylindrical batteries, a first heat-conducting component on one cylindrical battery is connected to a first heat-conducting component on the other cylindrical battery, and a second heat-conducting component on one cylindrical battery is connected to a second heat-conducting component on the other cylindrical battery.

[0015] The present invention employs a first heat-conducting component and a second heat-conducting component. A first cylindrical section is fitted onto the top of the cylindrical battery, and the top surface of the cylindrical battery can form a thermally conductive contact with the bottom wall of the first receiving cavity. A second cylindrical section is fitted onto the bottom of the cylindrical battery, and the bottom surface of the cylindrical battery can form a thermally conductive contact with the bottom wall of the second receiving cavity. Since the axial thermal conductivity of the cylindrical battery is much greater than its radial thermal conductivity, this means that the heat of the cylindrical battery can be conducted more quickly in the axial direction, achieving more efficient heat conduction. The heat of the cylindrical battery is rapidly conducted along its axial direction to the top and bottom of the cylindrical battery, and then to the first heat-conducting component at the top of the cylindrical battery and the second heat-conducting component of the cylindrical battery. The bottom walls of both the first and second cylindrical sections have built-in first coolant channels. When heat dissipation of the cylindrical battery is required, coolant can be introduced into the first coolant channels. At this time, the coolant can carry away the heat from the top and bottom surfaces of the cylindrical battery. Compared with the prior art, which only dissipates heat from the sides, this significantly improves the heat dissipation efficiency of the cylindrical battery.

[0016] The cylindrical battery heat dissipation device of this application has the following advantages:

[0017] 1) The axial heat conduction method is adopted, and the heat conduction efficiency is about 20 times that of radial heat conduction, which can significantly improve the heat dissipation effect of the cylindrical battery 20.

[0018] 2) The heat-conducting component of the cylindrical battery heat dissipation device of this application can be used as a device for fixing the cylindrical battery in the pack, which can realize the integration of cylindrical battery fixing and heat dissipation, and reduce manufacturing costs. Attached Figure Description

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

[0020] Figure 1 A partial structural schematic diagram of a cylindrical battery module according to an embodiment of the present invention is shown;

[0021] Figure 2 A partial structural schematic diagram of a cylindrical battery module according to an embodiment of the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Thermal conductive component; 11. First thermal conductive element; 111. First straight section; 112. First cylindrical section; 12. Second thermal conductive element; 121. Second straight section; 122. Second cylindrical section; 20. Cylindrical battery. Detailed Implementation

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] See also Figure 1 and Figure 2 As shown, this utility model provides a cylindrical battery heat dissipation device, which includes a heat-conducting assembly 10, comprising a first heat-conducting element 11 and a second heat-conducting element 12 separately disposed, the first heat-conducting element 11 and the second heat-conducting element 12 being spaced apart along a first direction, the first heat-conducting element 11 including a first straight section 111 and a first cylindrical section 112, the first cylindrical section 112 being connected to the side of the first straight section 111 facing the second heat-conducting element 12, the first cylindrical section 112 having a first receiving cavity, the first receiving cavity being configured to allow the top of the cylindrical battery 20 to be embedded. The bottom wall of the first receiving cavity forms a thermally conductive contact with the top surface of the cylindrical battery 20. The second thermally conductive element 12 includes a second flat section 121 and a second cylindrical section 122. The second cylindrical section 122 is connected to the side of the second flat section 121 facing the first thermally conductive element 11. The second cylindrical section 122 has a second receiving cavity, which is configured to allow the bottom of the cylindrical battery 20 to be embedded. The bottom wall of the second receiving cavity forms a thermally conductive contact with the bottom surface of the cylindrical battery 20. The bottom walls of the first cylindrical section 112 and the second cylindrical section 122 are both equipped with first coolant channels.

[0026] In this embodiment, the first direction refers to the axial direction of the cylindrical battery 20. A first cylindrical section 112 is fitted onto the top of the cylindrical battery 20, at which point the top surface of the cylindrical battery 20 can form a thermally conductive contact with the bottom wall of the first receiving cavity. A second cylindrical section 122 is fitted onto the bottom of the cylindrical battery 20, at which point the bottom surface of the cylindrical battery 20 can form a thermally conductive contact with the bottom wall of the second receiving cavity. Since the axial thermal conductivity of the cylindrical battery 20 is much greater than its radial thermal conductivity, this means that the heat of the cylindrical battery 20 can be conducted more quickly in the axial direction, achieving more efficient heat conduction. The heat of the cylindrical battery 20 is rapidly conducted along its axial direction to the top and bottom of the cylindrical battery 20, with the heat conducted to the top of the cylindrical battery 20... The heat is then conducted to the first heat-conducting element 11 at the top of the cylindrical battery 20, and the heat conducted to the bottom of the cylindrical battery 20 is then conducted to the second heat-conducting element 12 at the bottom of the cylindrical battery 20. The bottom walls of the first cylindrical section 112 and the second cylindrical section 122 are both built with first coolant channels, that is, the first cylindrical section 112 and the second cylindrical section 122 are both sandwiched, and the first coolant channels are provided in the sandwich. When it is necessary to dissipate heat from the cylindrical battery, coolant can be introduced into the first coolant channels. At this time, the coolant can carry away the heat from the top and bottom surfaces of the cylindrical battery 20. Compared with the existing technology that only dissipates heat from the side, it can significantly improve the heat dissipation efficiency of the cylindrical battery 20.

[0027] It should be noted that the bottom wall of the first receiving cavity and the top surface of the cylindrical battery 20 are in an insulating contact, meaning that they are not conductive to each other. Similarly, the bottom wall of the second receiving cavity and the bottom surface of the cylindrical battery 20 are in an insulating contact, meaning that they are not conductive to each other.

[0028] In one embodiment, both the first heat-conducting element 11 and the second heat-conducting element 12 are made of polyurethane material.

[0029] In one embodiment, both the first heat-conducting element 11 and the second heat-conducting element 12 are made of metal material, and the bottom wall of the first receiving cavity and the top surface of the cylindrical battery 20 are filled with thermally conductive adhesive (e.g., epoxy resin adhesive), and the bottom wall of the second receiving cavity and the bottom surface of the cylindrical battery 20 are filled with thermally conductive adhesive (e.g., epoxy resin adhesive).

[0030] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the first straight section 111 has a second coolant flow channel built in it, and the second coolant flow channel is connected to the first coolant flow channel of the first straight section 112.

[0031] In this embodiment, the first straight section 111 is provided with a second coolant flow channel inside, that is, the first straight section 111 has a sandwich layer, and the second coolant flow channel is provided inside the sandwich layer. The second coolant flow channel is connected to the first coolant flow channel, which can expand the flow path of the coolant and make better use of the surface area of ​​the first straight section 111 for heat exchange. It also increases the contact area between the coolant and the external heat dissipation medium (such as air or liquid cooling medium), which helps to further improve the heat dissipation efficiency of the cylindrical battery 20.

[0032] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the second straight section 121 has a third coolant flow channel built in it, and the third coolant flow channel is connected to the first coolant flow channel of the second straight section 122.

[0033] In this embodiment, a third coolant flow channel is provided inside the second straight section 121, that is, the second straight section 121 has a sandwich layer, and the third coolant flow channel is provided inside the sandwich layer. The third coolant flow channel is connected to the first coolant flow channel, which can expand the flow path of the coolant and make better use of the surface area of ​​the second straight section 121 for heat exchange. It also increases the contact area between the coolant and the external heat dissipation medium (such as air or liquid cooling medium), which helps to further improve the heat dissipation efficiency of the cylindrical battery 20.

[0034] In one embodiment of the present invention, the sidewall of the first receiving cavity forms a thermally conductive contact with the side surface of the cylindrical battery 20, and the sidewall of the second receiving cavity forms a thermally conductive contact with the side surface of the cylindrical battery 20.

[0035] In this embodiment, by making the sidewall of the first receiving cavity and the side of the portion of the cylindrical battery 20 located in the first receiving cavity form a thermally conductive contact, and by making the sidewall of the second receiving cavity and the side of the portion of the cylindrical battery 20 located in the second receiving cavity form a thermally conductive contact, the contact area for heat conduction can be significantly increased, and axial heat dissipation and radial heat dissipation can be achieved simultaneously, thereby further improving the heat dissipation efficiency of the cylindrical battery 20.

[0036] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the first heat-conducting element 11 further includes a first liquid inlet and a first liquid outlet. The first liquid inlet is disposed on the first straight cylindrical section 112 and / or the first flat section 111, and the first liquid outlet is disposed on the first straight cylindrical section 112 and / or the first flat section 111. The second heat-conducting element 12 further includes a second liquid inlet and a second liquid outlet. The second liquid inlet is disposed on the second straight cylindrical section 122 and / or the second flat section 121, and the second liquid outlet is disposed on the second straight cylindrical section 122 and / or the second flat section 121.

[0037] In this embodiment, the first liquid inlet is provided on the first straight cylindrical section 112 and / or the first flat section 111, that is, the first liquid inlet is provided on the first straight cylindrical section 112 or the first flat section 111, or the first straight section 111 and the first straight cylindrical section 112 are both provided with the first liquid inlet. The first liquid outlet is provided on the first straight cylindrical section 112 and / or the first flat section 111, that is, the first liquid outlet is provided on the first straight cylindrical section 112 or the first flat section 111, or the first flat section 111 and the first straight cylindrical section 112 are both provided with the first liquid outlet.

[0038] The second liquid inlet is provided on the first straight cylindrical section 112 and / or the first flat section 111, that is, the second liquid inlet is provided on the first straight cylindrical section 112 or the first flat section 111, or the first flat section 111 and the first straight cylindrical section 112 are both provided with the second liquid inlet. The second liquid outlet is provided on the first straight cylindrical section 112 and / or the first flat section 111, that is, the second liquid outlet is provided on the first straight cylindrical section 112 or the first flat section 111, or the first flat section 111 and the first straight cylindrical section 112 are both provided with the second liquid outlet.

[0039] The arrangement of the first inlet, the second inlet, the first outlet, and the second outlet allows the coolant to form a closed circulation path inside the heat-conducting components (first heat-conducting component 11 and second heat-conducting component 12). The coolant enters the corresponding heat-conducting component from the inlet (first inlet and second inlet), flows through the corresponding coolant channels (first coolant channel and second coolant channel), absorbs the heat from the cylindrical battery, and is then discharged from the corresponding outlet (first outlet and second outlet). After passing through the external cooling system, it is recirculated, ensuring continuous flow and effective heat exchange of the coolant and improving the heat dissipation efficiency of the cylindrical battery.

[0040] In one embodiment of this utility model, the length of the first cylindrical section 112 is L1, the length of the second cylindrical section 122 is L2, and the height of the cylindrical battery 20 is H. The three satisfy the relationship: H=k1×(L1+L2), and the value range of k1 is 5≤k1≤8.

[0041] Through the above configuration, on the one hand, the installation stability of the first heat-conducting element 11 and the second heat-conducting element 12 can be ensured. When the sidewalls of the first and second accommodating cavities form a thermally conductive fit with the side of the cylindrical battery 20, the thermally conductive contact area can also be ensured. On the other hand, the above configuration also helps to control the amount of material used in the heat dissipation device, avoid unnecessary material waste and cost increase, and at the same time, it is also beneficial to reduce the weight of the heat dissipation device. For mobile devices and electric vehicles, it can reduce the overall load and improve energy efficiency. Furthermore, it can also shorten the heat dissipation response time of the cylindrical battery 20, which helps to quickly reduce the temperature of the cylindrical battery 20.

[0042] In one embodiment of this utility model, the thickness of the first cylindrical section 112 and the second cylindrical section 122 is T1, and the diameter of the cylindrical battery 20 is D. The two satisfy the relationship: T1 / D=k2, and the value range is 0.12≤k2≤0.15.

[0043] Through the above settings, on the one hand, the thermal resistance of the straight section can be effectively controlled, ensuring that heat can be quickly transferred from the cylindrical battery 20 to the coolant, thereby improving heat dissipation efficiency. On the other hand, it also helps to control the amount of materials used, thereby reducing material costs and the weight of the heat dissipation device while ensuring the heat dissipation effect. Furthermore, it can also prevent deformation due to external pressure or temperature changes during use, ensuring the long-term stable operation of the heat dissipation device.

[0044] In one embodiment of the present invention, the portion of the cylindrical battery 20 located in the first receiving cavity is adapted to the inner wall of the first receiving cavity, and thermally conductive adhesive is filled between the portion of the cylindrical battery 20 located in the first receiving cavity and the inner wall of the first receiving cavity; the portion of the cylindrical battery 20 located in the second receiving cavity is adapted to the inner wall of the second receiving cavity, and thermally conductive adhesive is filled between the portion of the cylindrical battery 20 located in the second receiving cavity and the inner wall of the second receiving cavity.

[0045] In this embodiment, the filling of thermally conductive adhesive (e.g., epoxy resin adhesive) greatly enhances the thermal conductivity between the cylindrical battery 20 and the thermally conductive elements (first thermally conductive element 11 and second thermally conductive element 12). The thermally conductive adhesive can fill the tiny gaps between the cylindrical battery 20 and the inner walls of the receiving cavities (first and second receiving cavities), forming a continuous thermally conductive contact surface, significantly improving thermal conductivity efficiency and facilitating rapid heat dissipation. Even if there are minor unevenness or gaps between the cylindrical battery 20 and the inner walls of the receiving cavities, the thermally conductive adhesive can ensure that the contact surface between the two is consistent and smooth, avoiding local heat accumulation due to poor contact and improving the uniformity of heat dissipation. At the same time, the thermally conductive adhesive has a certain degree of elasticity, which can absorb the stress of the cylindrical battery 20 during vibration or thermal expansion and contraction, protecting the cylindrical battery 20 from mechanical stress damage and extending the service life of the cylindrical battery 20.

[0046] In one embodiment of the present invention, there are multiple first straight cylindrical segments 112, and the multiple first straight cylindrical segments 112 are spaced apart along the length direction of the first straight segment 111.

[0047] The above settings enable heat dissipation for multiple cylindrical batteries 20.

[0048] In one embodiment of the present invention, a first opening communicating with a first receiving cavity is provided on the first cylindrical section 112. The first opening is configured to form a connection channel for electrically connecting the conductive busbar and the cylindrical battery 20.

[0049] In this embodiment, the first opening serves as a connection channel, allowing the conductive busbar (e.g., a busbar) to be easily connected and electrically connected to the cylindrical battery 20. This simplifies the assembly process of the cylindrical battery 20 and improves production efficiency.

[0050] See also Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the bottom of the second cylindrical section 122 is provided with a second opening communicating with the second receiving cavity, and the bottom of the cylindrical battery 20 is provided with an explosion-proof valve, and the second opening is configured to correspond to the explosion-proof valve.

[0051] In this embodiment, when the cylindrical battery 20 experiences thermal runaway, the explosion-proof valve opens to release gas to prevent the battery from exploding. The second opening is correspondingly positioned to the explosion-proof valve, ensuring that gas can be quickly discharged and preventing gas from accumulating inside the cylindrical battery 20, thereby reducing the risk of explosion and enhancing safety performance.

[0052] According to another aspect of the present invention, a cylindrical battery module is provided, comprising: a cylindrical battery heat dissipation device as described above, and multiple heat-conducting components 10; multiple cylindrical batteries 20, wherein the multiple cylindrical batteries 20 are arranged in a one-to-one correspondence with the multiple heat-conducting components 10, and in two adjacent cylindrical batteries 20, a first heat-conducting component 11 on one cylindrical battery 20 is connected to a first heat-conducting component 11 on the other cylindrical battery 20, and a second heat-conducting component 12 on one cylindrical battery 20 is connected to a second heat-conducting component 12 on the other cylindrical battery 20.

[0053] In this embodiment, the cylindrical battery heat dissipation device of the cylindrical battery module has all the technical solutions and effects of the above-mentioned cylindrical battery heat dissipation device, which will not be repeated here.

[0054] In one embodiment, the cylindrical battery module further includes multiple conductive bars, which are arranged one-to-one with multiple cylindrical batteries 20, and the conductive bars are perpendicular to the direction of coolant flow in the first coolant channel.

[0055] In this embodiment, when the conductive busbar is perpendicular to the direction of the coolant flow, it helps to quickly dissipate the heat generated by the conductive busbar and avoid local overheating.

[0056] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: A first heat-conducting element and a second heat-conducting element are provided. The first cylindrical section is sleeved on the top of the cylindrical battery, and the top surface of the cylindrical battery can form a thermally conductive contact with the bottom wall of the first receiving cavity. The second cylindrical section is sleeved on the bottom of the cylindrical battery, and at this time, the bottom surface of the cylindrical battery can form a thermally conductive contact with the bottom wall of the second receiving cavity. Since the axial thermal conductivity of the cylindrical battery is much greater than the radial thermal conductivity, this means that the heat of the cylindrical battery can be dissipated more quickly in the axial direction. The heat conduction technology enables more efficient heat transfer. The heat of the cylindrical battery is rapidly conducted along its axial direction to the top and bottom of the cylindrical battery, and then to the first heat-conducting component at the top and the second heat-conducting component at the bottom. The bottom walls of both the first and second cylindrical sections have built-in first coolant channels. When heat dissipation is required, coolant can be introduced into the first coolant channels. At this time, the coolant can remove the heat from the top and bottom surfaces of the cylindrical battery. Compared with the existing technology that only dissipates heat from the sides, this technology can significantly improve the heat dissipation efficiency of the cylindrical battery.

[0057] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat dissipation device for a cylindrical battery, characterized in that, include: The heat-conducting assembly (10) includes a first heat-conducting element (11) and a second heat-conducting element (12) that are separately arranged. The first heat-conducting element (11) and the second heat-conducting element (12) are spaced apart along a first direction. The first heat-conducting element (11) includes a first straight section (111) and a first cylindrical section (112). The first cylindrical section (112) is connected to the side of the first straight section (111) facing the second heat-conducting element (12). The first cylindrical section (112) has a first receiving cavity. The first receiving cavity is configured to allow the top of the cylindrical battery (20) to be inserted. The bottom wall of the first receiving cavity forms a thermally conductive contact with the top surface of the cylindrical battery (20). The second heat-conducting element (12) includes a second straight section (121) and a second cylindrical section (122). The second cylindrical section (122) is connected to the side of the second straight section (121) facing the first heat-conducting element (11). The second cylindrical section (122) has a second receiving cavity. The second receiving cavity is configured to allow the bottom of the cylindrical battery (20) to be embedded. The bottom wall of the second receiving cavity forms a thermally conductive contact with the bottom surface of the cylindrical battery (20). The bottom walls of the first cylindrical section (112) and the bottom walls of the second cylindrical section (122) are both equipped with first coolant channels.

2. The cylindrical battery heat dissipation device according to claim 1, characterized in that, The first straight section (111) has a second coolant flow channel built in, and the second coolant flow channel is connected to the first coolant flow channel of the first straight section (112); and / or, the second straight section (121) has a third coolant flow channel built in, and the third coolant flow channel is connected to the first coolant flow channel of the second straight section (122).

3. The cylindrical battery heat dissipation device according to claim 1, characterized in that, The first heat-conducting component (11) further includes a first liquid inlet and a first liquid outlet. The first liquid inlet is disposed on the first straight section (112) and / or the first flat section (111), and the first liquid outlet is disposed on the first straight section (112) and / or the first flat section (111). The second heat-conducting component (12) further includes a second liquid inlet and a second liquid outlet. The second liquid inlet is disposed on the second straight section (122) and / or the second flat section (121), and the second liquid outlet is disposed on the second straight section (122) and / or the second flat section (121).

4. The cylindrical battery heat dissipation device according to any one of claims 1 to 3, characterized in that, The length of the first straight cylindrical section (112) is L1, the length of the second straight cylindrical section (122) is L2, and the height of the cylindrical battery (20) is H. The three satisfy the relationship: H=k1×(L1+L2), and the value range of k1 is 5≤k1≤8.

5. The cylindrical battery heat dissipation device according to any one of claims 1 to 3, characterized in that, The thickness of the first straight cylindrical section (112) and the second straight cylindrical section (122) is T1, and the diameter of the cylindrical battery (20) is D. The two satisfy the relationship: T1 / D=k2, and the value range of k2 is 0.12≤k2≤0.

15.

6. The cylindrical battery heat dissipation device according to any one of claims 1 to 3, characterized in that, The portion of the cylindrical battery (20) located in the first receiving cavity is adapted to the inner wall of the first receiving cavity, and thermally conductive adhesive is filled between the portion of the cylindrical battery (20) located in the first receiving cavity and the inner wall of the first receiving cavity. The portion of the cylindrical battery (20) located in the second receiving cavity is adapted to the inner wall of the second receiving cavity, and thermally conductive adhesive is filled between the portion of the cylindrical battery (20) located in the second receiving cavity and the inner wall of the second receiving cavity.

7. The cylindrical battery heat dissipation device according to any one of claims 1 to 3, characterized in that, There are multiple first straight cylindrical sections (112), and the multiple first straight cylindrical sections (112) are spaced apart along the length direction of the first straight section (111); and / or, the sidewall of the first receiving cavity forms a thermally conductive contact with the side of the cylindrical battery (20), and the sidewall of the second receiving cavity forms a thermally conductive contact with the side of the cylindrical battery (20).

8. The cylindrical battery heat dissipation device according to any one of claims 1 to 3, characterized in that, The first cylindrical section (112) is provided with a first opening communicating with the first receiving cavity. The first opening is configured to form a connection channel for the conductive busbar to be electrically connected to the cylindrical battery (20).

9. The cylindrical battery heat dissipation device according to any one of claims 1 to 3, characterized in that, The bottom of the second cylindrical section (122) is provided with a second opening that communicates with the second accommodating cavity, and the bottom of the cylindrical battery (20) is provided with an explosion-proof valve. The second opening is configured to correspond to the explosion-proof valve.

10. A cylindrical battery module, characterized in that, include: The cylindrical battery heat dissipation device as described in any one of claims 1 to 9, wherein the heat-conducting component (10) is a plurality of components; Multiple cylindrical batteries (20) are provided, and the multiple cylindrical batteries (20) are arranged in a one-to-one correspondence with the multiple thermal conductive components (10). In two adjacent cylindrical batteries (20), the first thermal conductive component (11) on one of the cylindrical batteries (20) is connected to the first thermal conductive component (11) on the other cylindrical battery (20), and the second thermal conductive component (12) on one of the cylindrical batteries (20) is connected to the second thermal conductive component (12) on the other cylindrical battery (20).

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