A heat dissipation component and battery pack for mounting battery modules

Abstract

This application relates to a heat dissipation assembly and battery pack for mounting battery modules, comprising: two heat dissipation side plates spaced apart; an end plate connected to both ends of the two heat dissipation side plates to form a heat dissipation frame; and a plurality of heat-conducting plates spaced apart along the length of the heat dissipation side plates within the heat dissipation frame and connected to the heat dissipation side plates to form multiple spaces for placing battery cells within the heat dissipation frame; each heat-conducting plate has a battery contact surface on both sides to hold the battery cells against the heat dissipation frame. The heat dissipation assembly stably places the battery cells within it and allows the heat generated by the battery cells to be transferred from the inside to various directions, with most of the heat ultimately transferred to the heat dissipation side plates. This increases the heat conduction area and direction, enabling heat to be promptly dissipated from the internal battery cells, achieving a multi-purpose effect and reducing manufacturing costs.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a heat dissipation component and battery pack for mounting battery modules. Background Technology

[0002] Currently, the operating temperature is a critical parameter for battery modules. During the cyclic charging and discharging process, individual battery cells generate heat due to their internal resistance. At higher charge / discharge rates, the internal polarization resistance of each cell increases significantly, making the heat generation even more pronounced. Excessively high cell temperatures disrupt the internal chemical balance, leading to side reactions. Furthermore, the performance of cell materials degrades under high temperatures, significantly reducing battery cycle performance. Therefore, heat dissipation design is a crucial aspect of battery module design.

[0003] In some related technologies, in the traditional battery module heat dissipation design, the heat dissipation of a single battery cell is usually achieved by adding heat-conducting aluminum plates to both sides or the bottom of the single battery cell, and then dissipating the heat from the module through the folded edges of the heat-conducting aluminum plates. However, this method has the following problems:

[0004] Because heat is conducted from the inside of the battery body to the heat-conducting aluminum plate, and then dissipated by the heat-conducting aluminum plate, most of the heat generated inside the battery is not dissipated in time, resulting in poor heat dissipation and affecting the cycle life of the battery module. Summary of the Invention

[0005] This application provides a heat dissipation component and battery pack for installing battery modules, in order to solve the problem in the related art that the heat dissipation of a single battery cell is usually achieved by adding heat-conducting aluminum plates to the two sides or the bottom of the single battery cell, which results in low heat dissipation efficiency.

[0006] In a first aspect, a heat dissipation assembly for mounting a battery module is provided, comprising:

[0007] Two heat dissipation side panels are spaced apart.

[0008] End plates, which are connected to both ends of the two heat dissipation side plates, form a heat dissipation frame;

[0009] Several heat-conducting plates are spaced apart within the heat dissipation frame along the length of the heat dissipation side plate and connected to the heat dissipation side plate to form multiple spaces for placing battery cells within the heat dissipation frame; both sides of the heat-conducting plates are provided with battery contact surfaces to hold the battery cells against the heat dissipation frame.

[0010] In some embodiments, the heat-conducting plate includes two sealed and fastened metal plates, the metal plates having a plurality of flow channel grooves, and the inner wall of the flow channel grooves having a metal powder sintered structure.

[0011] Multiple flow channels on two metal plates are sealed together to form multiple heat exchange channels, which are filled with a heat circulation medium.

[0012] In some embodiments, the heat exchange channel includes an evaporation section and a condensation section, with the condensation section located above the evaporation section and the end of the condensation section away from the evaporation section extending toward the heat dissipation side plate.

[0013] In some embodiments, the evaporation sections of all the heat exchange channels are arranged vertically and are spaced apart in the transverse direction of the heat-conducting plate;

[0014] The condensation section of all the heat exchange channels is an arc, and the radius of the condensation section gradually increases in the transverse direction of the heat-conducting plate.

[0015] In some embodiments, the heat-conducting plate is rectangular, and the plurality of heat exchange channels are divided into two symmetrical parts about the center line of the heat-conducting plate; the evaporation section of the heat exchange channel in each part is arranged vertically and is spaced apart in the transverse direction of the heat-conducting plate; the condensation section of the heat exchange channel is an arc, and the radius of the condensation section gradually increases in the transverse direction of the heat-conducting plate.

[0016] In some embodiments, the cross-sectional areas at both ends of the heat dissipation side plate are equal; or,

[0017] The cross-sectional area of ​​the heat dissipation side plate gradually decreases from one end to the other.

[0018] In some embodiments, the heat dissipation side plate also has multiple heat dissipation fins that extend along the length of the heat dissipation side plate.

[0019] In some embodiments, a heat insulation pad is also included, which is disposed on the surface of the end plate for contact with the battery cell.

[0020] Secondly, a battery pack is provided, comprising:

[0021] Multiple heat dissipation components; and,

[0022] Multiple battery cells are arranged in multiple heat dissipation components to form multiple battery modules, and the multiple battery modules are connected in series and / or in parallel.

[0023] The enclosure contains multiple battery modules; along the length of the heat dissipation side panel, and at both ends of the enclosure, there are air inlets and air outlets, with the air inlet located at the end with the smaller cross-sectional area of ​​the heat dissipation side panel.

[0024] In some embodiments, a cooling fan and a temperature sensor are also included, which are disposed inside the housing and located at the air outlet end; when the temperature sensor detects that the temperature inside the housing has reached a threshold, the cooling fan is turned on.

[0025] The beneficial effects of the technical solution provided in this application include:

[0026] This application provides a heat dissipation assembly for mounting battery modules. Since end plates are positioned at both ends of a heat dissipation side plate to form a rectangular frame, multiple heat-conducting plates are spaced apart within the heat dissipation frame along the length of the heat dissipation side plate and connected to it. This forms a stable frame structure capable of holding multiple battery cells. The battery cells are placed within the frame structure, and the battery contact surfaces of the heat-conducting plates cover and support the end faces of the battery cells, ensuring their stable placement. The heat generated by the battery cells can be transferred from the inside in all directions, with most of it ultimately transferred to the heat dissipation side plate. This design increases the heat conduction area and direction, allowing heat to be promptly dissipated from the internal battery cells, improving heat dissipation efficiency and ensuring battery cell performance. It achieves both battery cell mounting and heat dissipation, providing a multi-purpose solution and reducing manufacturing costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the battery module provided in the embodiments of this application;

[0029] Figure 2 This is an exploded view of the battery module provided in an embodiment of this application;

[0030] Figure 3 A schematic diagram of a heat dissipation assembly for mounting a battery module provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of a heat-conducting plate provided in an embodiment of this application;

[0032] Figure 5 A schematic diagram of a battery pack with a housing provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of a battery pack with a housing, provided as an embodiment of this application.

[0034] In the diagram: 1. Heat dissipation side plate; 2. End plate; 3. Heat conduction plate; 30. Heat exchange channel; 300. Evaporation section; 301. Condensation section; 4. Battery cell; 5. Heat dissipation fins; 6. Heat insulation pad; 7. Housing; 8. Air inlet; 9. Air outlet; 10. Cooling fan. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] A heat dissipation component and battery pack for mounting battery modules are provided to address the problem in related technologies where heat dissipation of individual battery cells typically involves adding heat-conducting aluminum plates to the two sides or bottom of the individual battery cell, resulting in low heat dissipation efficiency.

[0037] Please see Figure 3 A heat dissipation assembly for mounting a battery module includes two heat dissipation side plates 1, an end plate 2, and several heat conduction plates 3;

[0038] Two heat dissipation side plates 1 are spaced apart, and each of the two heat dissipation side plates 1 is fixedly connected to an end plate 2, thereby forming a heat dissipation frame; a number of heat conduction plates 3 are spaced apart along the length of the heat dissipation side plates 1 in the heat dissipation frame and are fixedly connected to the heat dissipation side plates 1 to form multiple spaces for placing battery cells 4 in the heat dissipation frame; battery contact surfaces are provided on both sides of the heat conduction plates 3 to hold the battery cells 4 against the heat dissipation frame.

[0039] The above structure first provides a frame structure that can install and fix multiple battery cells 4. When the battery cell 4 is placed in the space formed by the heat-conducting plate 3, the battery contact surface of the heat-conducting plate 3 covers the end face of the battery cell 4 and fits against the battery cell 4, so that the battery cell 4 is stably placed in it.

[0040] Furthermore, because the heat-conducting plate 3 covers the end face of the battery cell 4, thus... Figure 3 As indicated by the dashed arrow, the heat generated inside the battery cell 4 can be transferred in all directions, with most of it ultimately transferred to the heat dissipation side plate 1 for heat dissipation. During the heat dissipation process, multiple heat-conducting plates 3 form multiple heat dissipation points, dissipating heat around the heat-conducting plates 3, forming the first stage of heat dissipation and conduction. The heat dissipation side plate 1, which is in contact with the heat-conducting plates 3, is connected to multiple heat-conducting plates 3, thereby transferring the heat transmitted by the multiple heat-conducting plates 3 (equivalent to branches) to the heat dissipation side plate 1 (equivalent to mains), thus leading it out to the outside, forming the second stage of heat dissipation and conduction.

[0041] The above settings increase the heat conduction area and the direction and flow of heat conduction, so that heat can be discharged from the internal battery cell 4 in a timely manner, improving heat dissipation efficiency and ensuring the performance of battery cell 4. This achieves heat dissipation while installing battery cell 4, achieving a multi-purpose effect and reducing manufacturing costs.

[0042] It should be understood that a support plate is fixedly connected to the bottom of the formed heat dissipation frame, and the support plate is a heat dissipation metal plate;

[0043] Alternatively, a limiting right-angle piece can be fixedly connected to the bottom of the heat dissipation frame. The limiting right-angle piece is used to fit against the corner of the battery cell 4 to prevent the battery cell 4 from falling off. This form does not require a heat dissipation metal plate and is in contact with the outside air, which facilitates heat dissipation.

[0044] In some preferred embodiments, the heat dissipation side plate 1 is provided with a vertical mounting groove, which facilitates the insertion of the heat conduction plate 3 into the heat dissipation side plate 1, avoiding welding fixation.

[0045] See Figure 4 In some preferred embodiments, the heat-conducting plate 3 can be a single aluminum plate. To enhance its heat conduction effect, the heat-conducting plate 3 is configured as follows:

[0046] The heat-conducting plate 3 includes two metal plates that are sealed and connected together. The metal plates are provided with multiple flow channels and the inner walls of the flow channels are provided with metal powder sintering structures. The multiple flow channels on the two metal plates are sealed together to form multiple heat exchange channels 30, and the heat exchange channels 30 are filled with heat circulation medium.

[0047] After the heat exchange channel 30 is filled with a heat circulation medium (such as deionized water or other low-boiling-point liquids with high heat transfer coefficients), it is evacuated and sealed by welding. This allows the battery to be cooled down quickly using the heat pipe principle, which is equivalent to adding multiple heat exchange tubes inside the heat conduction plate 3. The sintered metal powder structure in the heat exchange tubes acts as a capillary wick, enhancing the circulation of the heat circulation medium.

[0048] Furthermore, the heat exchange channel 30 includes an evaporation section 300 and a condensation section 301. The condensation section 301 is located above the evaporation section 300. This ensures that the evaporation section 300 and the condensation section 301 do not exchange heat at the same vertical height, making full use of gravity and ensuring a good heat exchange effect.

[0049] Furthermore, the end of the condensing section 301 of each heat exchange channel 30 away from the evaporating section 300 extends toward the heat dissipation side plate 1, which facilitates the transfer of the heat released by the condensing section 301 to the heat dissipation side plate 1, thereby further cooperating with the heat transfer from the branch to the main circuit mentioned above.

[0050] Furthermore, the distribution of the heat exchange channels 30 was designed:

[0051] In the first case, the evaporation sections 300 of all heat exchange channels 30 are arranged vertically and are evenly spaced in the horizontal direction of the heat-conducting plate 3; the condensation section 301 is located above the evaporation section 300, and the condensation section 301 is an arc. In the horizontal direction of the heat-conducting plate 3, the radius of the condensation section 301 gradually increases.

[0052] The second type has a rectangular heat-conducting plate 3, and multiple heat exchange channels 30 are divided into two symmetrical parts about the center line of the heat-conducting plate 3. The two parts dissipate heat to the corresponding heat dissipation side plate 1. The evaporation section 300 of the heat exchange channel 30 in each part is arranged vertically and is distributed at intervals in the horizontal direction of the heat-conducting plate 3. The condensation section 301 of the heat exchange channel 30 is an arc, and the radius of the condensation section 301 gradually increases in the horizontal direction of the heat-conducting plate 3.

[0053] Through the two methods described above, the multiple heat exchange channels 30 achieve a variable cross-section structure, which makes their heat dissipation capacity different in the vertical and horizontal directions, so as to adapt to the heat dissipation conditions of the battery during actual use, thereby solving the problem of temperature difference that easily occurs inside and outside or vertically within the battery, and ensuring uniform battery temperature.

[0054] See Figure 1 and Figure 2 In some preferred embodiments, the structure of the heat dissipation side plate 1 is designed as follows:

[0055] The first type has equal cross-sectional areas at both ends of the heat dissipation side plate 1;

[0056] The second type involves a heat dissipation side plate 1 whose cross-sectional area gradually decreases from one end to the other. This arrangement ensures that the heat dissipation capacity of each part of the heat dissipation side plate 1 matches the heat generated by the battery. In other words, the entire heat dissipation assembly is housed within a single enclosure, with the heat dissipation side plate 1 having a smaller cross-sectional area near the air inlet and a larger cross-sectional area further away from the air inlet, thereby guaranteeing temperature uniformity within the enclosure.

[0057] Furthermore, the heat dissipation side plate 1 also has multiple heat dissipation fins 5, which extend along the length of the heat dissipation side plate 1 to enhance the heat dissipation effect.

[0058] See Figure 1 and Figure 2 In some preferred embodiments, the heat dissipation assembly also includes a heat insulation pad 6, which is disposed on the surface of the end plate 2 that is in contact with the battery cell 4, to prevent heat from being transferred to the end plate 2 and to provide thermal isolation.

[0059] See Figures 1-6 This application also proposes a battery pack comprising multiple heat dissipation components, multiple battery cells 4, and a housing 7.

[0060] Among them, multiple battery cells 4 are set in multiple heat dissipation components to form multiple battery modules, and the multiple battery modules are connected in series and / or in parallel.

[0061] Multiple battery modules are placed inside the housing 7; along the length of the heat dissipation side plate 1, and at both ends of the housing 7, there are air inlets 8 and air outlets 9, respectively, with the air inlet 8 located at the end with the smaller cross-sectional area of ​​the heat dissipation side plate 1. This arrangement allows for better airflow.

[0062] Furthermore, the battery pack utilizes a heat dissipation component, which has excellent heat dissipation capabilities, ensuring the stability of its battery performance and extending its service life.

[0063] Furthermore, it also includes a cooling fan 10 installed inside the housing 7 and located at one end of the air outlet 9, as well as a temperature sensor; when the temperature sensor detects that the temperature inside the housing 7 has reached a threshold, the cooling fan 10 is turned on to blow out the hot air inside the housing and form a cooling airflow that continuously acts on the heat dissipation side plate 1.

[0064] In other words, the heat dissipation component can also dissipate heat below the threshold, and equipping it with a cooling fan 10 only enhances its heat dissipation capability.

[0065] Among them, in box 7 Figure 5 and Figure 6 The specific form shown is as follows:

[0066] Each housing 7 contains two battery modules, each with a corresponding cooling fan 10, thus achieving better heat dissipation.

[0067] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A heat dissipation assembly for mounting a battery module, characterized by, It comprises: Two heat dissipation side plates (1) are arranged at intervals; End plates (2) are connected at both ends of the two heat dissipation side plates (1) to form a heat dissipation frame; A plurality of heat conduction plates (3) are arranged at intervals along the length direction of the heat dissipation side plate (1) in the heat dissipation frame and connected with the heat dissipation side plate (1) to form a plurality of spaces for placing battery monomers (4) in the heat dissipation frame; both sides of the heat conduction plate (3) are provided with battery contact surfaces to abut the battery monomers (4) in the heat dissipation frame; The heat conduction plate (3) comprises two sealed and buckled metal plates, a plurality of flow channel grooves are arranged on the metal plates, and a metal powder sintering structure is arranged on the inner wall of the flow channel groove; a plurality of flow channel grooves on the two metal plates are sealed and combined to form a plurality of heat exchange channels (30), and the heat exchange channels (30) are filled with heat circulating medium; the heat exchange channel (30) comprises an evaporation section (300) and a condensation section (301), the condensation section (301) is located above the evaporation section (300), and one end of the condensation section (301) away from the evaporation section (300) extends to the heat dissipation side plate (1); The evaporation sections (300) of all the heat exchange channels (30) are arranged vertically and are arranged at intervals in the transverse direction of the heat conduction plate (3); the condensation sections (301) of all the heat exchange channels (30) are circular arcs, and the radius of the condensation section (301) gradually increases in the transverse direction of the heat conduction plate (3).

2. The heat dissipation assembly for mounting the battery module according to claim 1, wherein: The heat conduction plate (3) is rectangular, and the plurality of heat exchange channels (30) are divided into two parts symmetrically about the center line of the heat conduction plate (3); the evaporation sections (300) of the heat exchange channels (30) in each part are arranged vertically and are arranged at intervals in the transverse direction of the heat conduction plate (3); the condensation sections (301) of the heat exchange channels (30) are circular arcs, and the radius of the condensation section (301) gradually increases in the transverse direction of the heat conduction plate (3).

3. The heat dissipation assembly for mounting the battery module according to claim 1, wherein: The cross-sectional areas of the heat dissipation side plates (1) at both ends are equal; or The cross-sectional areas of the heat dissipation side plates (1) gradually decrease from one end to the other end.

4. The heat dissipation assembly for mounting the battery module according to claim 1 or 3, wherein: The heat dissipation side plate (1) is further provided with a plurality of heat dissipation fins (5) extending along the length direction of the heat dissipation side plate (1).

5. The heat dissipation assembly for mounting the battery module according to claim 1, further comprising: A heat insulation pad (6) is arranged on the surface of the end plate (2) for contacting the battery monomer (4).

6. A battery pack, characterized by, It comprises: A plurality of heat dissipation assemblies according to any one of claims 1-5, wherein the cross-sectional areas of the heat dissipation side plates (1) gradually decrease from one end to the other end; and A plurality of battery monomers (4) are arranged in the plurality of heat dissipation assemblies to form a plurality of battery modules, and the plurality of battery modules are connected in series and / or in parallel. ​ The box (7) is used for placing a plurality of battery modules; along the length direction of the heat dissipation side plate (1), and located at both ends of the box (7) are respectively provided with an air inlet (8) and an air outlet (9), and the air inlet (8) is located at one end of the heat dissipation side plate (1) with smaller cross-sectional area.

7. The battery pack of claim 6, wherein: Further comprising a heat dissipation fan (10) and a temperature sensor, which are arranged in the box (7) and located at one end of the air outlet (9); when the temperature sensor detects that the temperature in the box (7) reaches a threshold value, the heat dissipation fan (10) is started.

Images