Air-cooled battery module and energy storage battery box

Abstract

The utility model discloses an air-cooled battery module and an energy storage battery box, the energy storage battery box comprises a box body and an air-cooled battery module arranged in the box body, and the air-cooled battery module comprises a fan assembly, a module frame and a plurality of battery cells arranged in the module frame; an interval is formed between every two adjacent battery cells, and the multiple intervals are communicated with one another to form a heat dissipation air duct; the module frame comprises an air inlet side and an air outlet side which are oppositely arranged, the fan assembly is arranged on the air inlet side, the air inlet side is provided with a plurality of Laval spray pipes, the air inlet ends of the Laval spray pipes are communicated with the fan assembly, the air outlet ends of the Laval spray pipes are communicated with the heat dissipation air channel, and air blown out by the fan assembly enters the heat dissipation air channel through the Laval spray pipes. And the air is blown out from the air outlet side after penetrating through the heat dissipation air channel. By adopting the structure, the cooling gas flows more smoothly among the battery cells, and the flow rate of the cooling gas can be increased by arranging the Laval nozzle, so that the heat exchange efficiency between the cooling gas and the battery cells can be improved, and the battery cells can obtain a better cooling effect.

Description

Technical Field

[0001] The present application belongs to the field of distributed energy storage technology, and specifically relates to an air-cooled battery module and an energy storage battery box. Background Art

[0002] At present, power batteries are the main components driving the development of electric vehicles, among which the development level of power battery heat dissipation technology has a significant impact on the service life and use effect of power batteries.

[0003] In existing air-cooled power batteries, the battery cells of the battery module are arranged very tightly. The battery cells located in the middle part of the battery module usually have poor heat dissipation, which may cause the temperature in the middle part of the battery module to be higher, affecting the consistency of the internal temperature of the battery module, thereby reducing the safety performance and service life of the battery module. Utility Model Content

[0004] The present application provides an air-cooled battery module and an energy storage battery box to solve at least one of the above technical problems.

[0005] The technical solutions adopted in this application are:

[0006] In the first aspect, the present application provides an air-cooled battery module, comprising a fan assembly, a module frame, and a plurality of battery cells arranged inside the module frame; a gap is provided between two adjacent battery cells, and the plurality of gaps are interconnected to form a heat dissipation duct; the module frame comprises an air inlet side and an air outlet side arranged relatively to each other, the fan assembly is arranged on the air inlet side, and the air inlet side is provided with a plurality of Laval nozzles, the air inlet end of the Laval nozzle is connected to the fan assembly, and the air outlet end of the Laval nozzle is connected to the heat dissipation duct, the air blown out by the fan assembly enters the heat dissipation duct through the Laval nozzle, passes through the heat dissipation duct and is blown out from the air outlet side.

[0007] As a preferred embodiment of the present application, the interval includes a first interval along the air inlet direction of the air inlet side and a second interval perpendicular to the air inlet direction of the air inlet side; along the air inlet direction of the air inlet side, the plurality of battery cells are divided into a first group, a second group and a third group as a whole, and the second interval between two adjacent battery cells in the first group and the third group is not less than the second interval between two adjacent battery cells in the second group; and the plurality of Laval nozzles are arranged one by one corresponding to the second interval.

[0008] As a preferred embodiment of the present application, along the air inlet direction of the air inlet side, the second interval between two adjacent battery cells in the first group gradually decreases, and the second interval between two adjacent battery cells in the third group gradually increases.

[0009] As a preferred embodiment of the present application, the first interval between two adjacent battery cells in the first group, the second group, and the third group is the same.

[0010] As a preferred embodiment of the present application, the fan assembly includes an air guide cover and a fan, the air inlet of the air guide cover is connected to the fan, and the air outlet of the air guide cover is connected to the air inlet end of the Laval nozzle.

[0011] As a preferred embodiment of the present application, the fan is provided with one, the air guide cover has an air inlet and multiple air outlets, and the multiple air outlets are arranged in a one-to-one correspondence with the Laval nozzle; or, the fan, the air guide cover and the Laval nozzle are arranged in a one-to-one correspondence.

[0012] As a preferred embodiment of the present application, a heat exchange tube is arranged around the outer wall of the air guide cover, and a heat exchange medium is contained in the heat exchange tube.

[0013] In a second aspect, the present application provides an energy storage battery box, which includes a box body and the air-cooled battery module as described above, wherein the air-cooled battery module is arranged inside the box body, and the side wall of the box body is provided with an air dispersion outlet, and the air dispersion outlet is connected to the air outlet side.

[0014] As a preferred embodiment of the present application, at least two air-cooled battery modules are arranged inside the box, the air inlet sides of two adjacent air-cooled battery modules are arranged adjacent to each other, and the air outlet sides of the air-cooled battery modules face the side wall of the box.

[0015] As a preferred embodiment of the present application, a medium storage tank is provided inside or outside the box, a heat exchange medium is provided inside the medium storage tank, and the medium storage tank is connected to a heat exchange pipe and a heat exchange pump.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0017] 1. In the above solution, by providing a Laval nozzle on the air inlet side, the initial velocity of the cooling airflow when entering the heat dissipation flow channel between the battery cells is increased. This allows the cooling gas to more easily enter the battery module and dissipate heat from the battery cells within the battery module, thereby preventing the temperature of the battery cells in the middle of the battery module from being higher than that of the surrounding cells, thereby ensuring the consistency of the internal temperature of the battery module. At the same time, the increased flow rate of the cooling gas also increases the flow rate of the cooling gas flowing through the heat dissipation flow channel between the battery cells per unit time, thereby improving the heat carrying capacity of the cooling airflow per unit time and enhancing the heat dissipation efficiency and effect of the battery cells.

[0018] 2. In the above solution, by arranging the battery cells and jointly configuring the second spacing between the battery cells as a Laval nozzle-like structure, the cooling airflow can be better guided to accelerate the flow. The Laval nozzle-like structure is configured to adapt to the pressure and flow rate changes of the cooling airflow along its flow path, making the cooling gas flow more uniform throughout the heat dissipation flow channel;

[0019] 3. In the above scheme, the provision of the air guide cover can better ensure the stability of the air path when the cooling air flows in the heat dissipation channel, reduce the risk of turbulence and turbulence affecting the cooling and heat dissipation effect, and by winding the heat exchange tube around the outside of the air guide cover, the temperature of the cooling air flow can be further reduced when the cooling air flow flows through the air guide cover, thereby improving its heat carrying capacity and further improving the heat dissipation efficiency and heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a schematic diagram of the structure of an example air-cooled battery module;

[0022] Figure 2 is a schematic diagram of a first interval and a second interval between adjacent battery cells;

[0023] Figure 3 This is a schematic diagram of a top view of the structure in which multiple air-cooled battery modules share a set of fan components in an example;

[0024] Figure 4 This is a structural diagram of an energy storage battery box in an example;

[0025] Figure 5 This is a schematic diagram of the arrangement structure of the air-cooled battery module in the energy storage battery box in an example.

[0026] List of parts and reference numerals:

[0027] 1 air-cooled battery module, 11 module frame, 111 air inlet side, 112 air outlet side, 113 Laval nozzle, 12 fan assembly, 121 fan, 122 air guide cover, 13 battery cell, 131 first compartment, 132 second compartment, 133 first group, 134 second group, 135 third group, 14 heat exchange tube;

[0028] 2 energy storage battery box, 21 box body, 211 air outlet, 22 medium storage tank, 23 heat exchange pump. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0030] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0031] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0032] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] Reference Figure 1-5 As shown, the present application provides an air-cooled battery module 1 and an energy storage battery box 2. Figure 1As shown, the air-cooled battery module includes a fan assembly 12, a module frame 11 and a plurality of battery cells 13 arranged inside the module frame 11; a gap is provided between two adjacent battery cells 13, and the plurality of gaps are interconnected to form a heat dissipation duct; the module frame 11 includes an air inlet side 111 and an air outlet side 112 arranged relatively, the fan assembly 12 is arranged on the air inlet side 111, and the air inlet side 111 is provided with a plurality of Laval nozzles 113, the air inlet end of the Laval nozzle 113 is connected to the fan assembly 12, and the air outlet end of the Laval nozzle 113 is connected to the heat dissipation duct, and the air blown out by the fan assembly 12 enters the heat dissipation duct through the Laval nozzle 113, passes through the heat dissipation duct and is blown out from the air outlet side 112.

[0035] In the above scheme, forming a heat dissipation channel between the battery cells 13 is more conducive to improving the smoothness of the flow of cooling gas between the battery cells 13, and by arranging a Laval nozzle 113 on the air inlet side 111, the flow rate of the cooling gas entering the heat dissipation channel can be increased, and at the same time, the flow rate of the cooling gas per unit time is increased, thereby improving the heat exchange efficiency between the cooling gas and the battery cells 13 so that the battery cells 13 can obtain a better cooling effect, thereby ensuring the safe and stable operation of the entire battery module.

[0036] In one example, referring to Figure 2 As shown, the interval includes a first interval 131 along the air inlet direction of the air inlet side 111 and a second interval 132 perpendicular to the air inlet direction of the air inlet side 111; continue to refer to Figure 1 As shown, along the air inlet direction of the air inlet side 111, the plurality of battery cells 13 are generally divided into a first group 133, a second group 134, and a third group 135. The second interval 132 between adjacent battery cells 13 in the first group 133 and the third group 135 is no less than the second interval 132 between adjacent battery cells 13 in the second group 134. The plurality of Laval nozzles 113 are arranged one-to-one corresponding to the second intervals 132. Preferably, along the air inlet direction of the air inlet side 111, the second interval 132 between adjacent battery cells 13 in the first group 133 gradually decreases, and the second interval 132 between adjacent battery cells 13 in the third group 135 gradually increases. The first interval 131 between adjacent battery cells 13 in the first group 133, the second group 134, and the third group 135 are the same. By adopting the above-mentioned setting method, not only can the cooling airflow entering between the battery cells 13 be accelerated at the air inlet side 111 through the Laval nozzle 113, but also the flow of the cooling airflow can be further guided by forming a Laval nozzle 113-like structure between the battery cells 13, which is conducive to accelerating the flow of cooling gas between the battery cells 13, so as to obtain a better cooling effect and ensure the safe and stable operation of the entire battery module.

[0037] Continue to refer to Figure 1As shown, the fan assembly 12 includes an air guide hood 122 and a fan 121. The air inlet of the air guide hood 122 is connected to the fan 121, and the air outlet of the air guide hood 122 is connected to the air inlet end of the Laval nozzle 113. In one example, referring to Figure 1 and Figure 3 As shown, the fan 121 is provided with one, and the air guide cover 122 has an air inlet and multiple air outlets. The multiple air outlets are arranged in a one-to-one correspondence with the Laval nozzle 113. This arrangement can save the installation space occupied by the fan 121, facilitate the miniaturization of the structure, and save equipment costs. In another example, the fan 121, the air guide cover 122 and the Laval nozzle 113 are arranged in a one-to-one correspondence. This arrangement can better ensure the stability of the cooling air flow in the heat dissipation flow channel, reduce the risk of turbulence and turbulence affecting the cooling and heat dissipation effect.

[0038] In the above solution, the provision of the air guide 122 allows the cooling airflow generated by the fan 121 to be concentrated into the Laval nozzle 113, thereby better creating a pressure difference at both ends of the Laval nozzle 113, allowing the Laval nozzle 113 to better exert its airflow acceleration effect. It should be noted that the arrangement of the fan 121 and the air guide 122 in this application is not limited to the above two examples. The above two examples are only preferred examples of this application. It can also adopt other different arrangement methods other than the above two examples, and this application does not specifically limit this.

[0039] Furthermore, as a preferred embodiment of the present application, a heat exchange tube 14 is provided around the outer wall of the aforementioned air scoop 122, and the heat exchange tube 14 is filled with a heat exchange medium. In the above solution, by providing the heat exchange tube 14 outside the air scoop 122, the airflow generated by the fan 121 can be further cooled when passing through the air scoop 122. This allows the cooling airflow to exchange heat more effectively when entering between the battery cells 13, and can carry more heat out to the outside of the battery module, thereby achieving a better cooling effect on the battery cells 13 and ensuring the safe and stable operation of the entire battery module.

[0040] Further, refer to Figure 4 and Figure 5As shown, the aforementioned energy storage battery box 2 includes a box body 21 and the aforementioned air-cooled battery module 1 arranged inside the box body 21. Preferably, an air dispersing vent 211 is provided on the side wall of the box body 21, and the air outlet side 112 of the air-cooled battery module 1 is arranged corresponding to the air dispersing vent 211 on the side wall of the box body 21, so that the heat generated by the operation of the air-cooled battery module 1 can be quickly dissipated to the outside of the box body 21 through the air outlet side 112 and the air dispersing vent 211. As a preferred embodiment of the embodiment of the present application, at least two air-cooled battery modules 1 are arranged inside the box body 21, and the air inlet sides 111 of two adjacent air-cooled battery modules 1 are arranged adjacent to each other, and the air outlet side 112 of the air-cooled battery module 1 faces the side wall of the box body 21. By adopting this setting, multiple air-cooled battery modules 1 can share a set of fan assemblies 12, and when adopting this setting, the cooling airflow generated by the fan 121 is diffused from the middle of the energy storage battery box 2 to the surrounding areas, which can solve the problem that the heat in the middle of the energy storage battery box 2 is more concentrated and difficult to dissipate.

[0041] Furthermore, as a preferred embodiment of the present application, a medium storage tank 22 is provided inside or outside the housing 21, a heat exchange medium is provided inside the medium storage tank 22, and the medium storage tank 22 is connected to a heat exchange pipe 14 and a heat exchange pump 23. The heat exchange pipe 14 here is the aforementioned heat exchange pipe 14 wound around the outside of the air guide cover 122, and the heat exchange medium in the medium storage tank 22 is pumped into the heat exchange pipe 14 through the heat exchange pump 23. Preferably, the medium storage tank 22 and the heat exchange pump 23 are both provided inside the housing 21, so that the housing 21 provides protection for the medium storage tank 22 and the heat exchange pump 23. Of course, the medium storage tank 22 and the heat exchange pump 23 can also be provided outside the housing 21, in which case a separate protective structure can also be provided for them outside the housing 21. Alternatively, the heat exchange pipe 14 can also be directly connected to the medium storage tank 22 or air conditioning pipeline of the vehicle's air conditioning system, eliminating the need for an external medium storage tank 22 and heat exchange pump 23, and this application does not make any specific restrictions on this.

[0042] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0043] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of the claims of the present application.

Claims

1. An air-cooled battery module, characterized in that: It includes a fan assembly, a module frame and multiple battery cells arranged inside the module frame; a gap is provided between two adjacent battery cells, and multiple gaps are interconnected to form a heat dissipation duct; the module frame includes an air inlet side and an air outlet side arranged relatively, the fan assembly is arranged on the air inlet side, and the air inlet side is provided with multiple Laval nozzles, the air inlet end of the Laval nozzle is connected to the fan assembly, and the air outlet end of the Laval nozzle is connected to the heat dissipation duct, the air blown out by the fan assembly enters the heat dissipation duct through the Laval nozzle, passes through the heat dissipation duct and is blown out from the air outlet side.

2. The air-cooled battery module according to claim 1, wherein: The interval includes a first interval along the air inlet direction of the air inlet side and a second interval perpendicular to the air inlet direction of the air inlet side; along the air inlet direction of the air inlet side, the multiple battery cells are divided into a first group, a second group and a third group as a whole, and the second interval between two adjacent battery cells in the first group and the third group is not less than the second interval between two adjacent battery cells in the second group; the multiple Laval nozzles are arranged one by one corresponding to the second interval.

3. The air-cooled battery module according to claim 2, wherein: Along the air inlet direction of the air inlet side, the second interval between two adjacent battery cells in the first group gradually decreases, and the second interval between two adjacent battery cells in the third group gradually increases.

4. The air-cooled battery module according to claim 2, wherein: The first interval between two adjacent battery cells in the first group, the second group, and the third group is the same.

5. The air-cooled battery module according to claim 2, wherein: The fan assembly includes an air guide cover and a fan, the air inlet of the air guide cover is connected to the fan, and the air outlet of the air guide cover is connected to the air inlet end of the Laval nozzle.

6. The air-cooled battery module according to claim 5, characterized in that: The fan is provided with one, the air guide cover has an air inlet and multiple air outlets, and the multiple air outlets are arranged in a one-to-one correspondence with the Laval nozzle; or the fan, the air guide cover and the Laval nozzle are arranged in a one-to-one correspondence.

7. The air-cooled battery module according to claim 6, wherein: A heat exchange tube is arranged around the outer wall of the air guide cover, and a heat exchange medium is arranged in the heat exchange tube.

8. An energy storage battery box, characterized in that: It comprises a box body and the air-cooled battery module according to any one of claims 1 to 7, wherein the air-cooled battery module is arranged inside the box body, and the side wall of the box body is provided with an air dispersion port, and the air dispersion port is connected to the air outlet side.

9. The energy storage battery box according to claim 8, characterized in that: At least two air-cooled battery modules are arranged inside the box, the air inlet sides of two adjacent air-cooled battery modules are arranged adjacent to each other, and the air outlet sides of the air-cooled battery modules face the side wall of the box.

10. The energy storage battery box according to claim 9, characterized in that: A medium storage tank is provided inside or outside the box body, a heat exchange medium is provided inside the medium storage tank, and the medium storage tank is connected to a heat exchange pipe and a heat exchange pump.

Images