Closed air-cooled battery pack
By designing a closed-loop air-cooled battery pack and utilizing a combination of heat sink and vapor chamber, efficient heat transfer and temperature uniformity are achieved within the battery pack, solving the problem of large temperature differences in existing air-cooled battery packs and improving heat dissipation efficiency.
Patent Information
- Application Number
- CN202422903778.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing air-cooled battery packs have poor temperature uniformity and large temperature differences, resulting in low heat dissipation efficiency.
It adopts a closed structure design, including a box, battery module, heat spreader and heat sink. By setting heat sink between the cells and installing heat spreader on the side of the battery module, efficient heat transfer and temperature uniformity are achieved by using refrigerant circulation and heat conduction.
This achieves high temperature uniformity and small temperature difference inside the battery pack, improves heat dissipation performance, and solves the problem of temperature non-uniformity.
Smart Images
Figure CN223651465U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of energy storage battery, especially to a closed air-cooled battery pack. BACKGROUND
[0002] In recent years, with the increasing attention of the state to the new energy industry, especially the increasing sales of energy storage power stations and new energy vehicles, the battery pack as the core has also developed rapidly.
[0003] Among them, the air-cooled battery pack is widely used as the main product due to its convenient maintenance, easy installation, low investment cost and other advantages. The air-cooled battery on the market currently adopts forced air cooling mode, and the temperature uniformity is poor and the temperature difference is large.
[0004] Therefore, there is an urgent need for a closed air-cooled battery pack to solve the above technical problems. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a closed air-cooled battery pack, which can solve the problem of large temperature difference under the premise of meeting the requirement of rapid heat dissipation, so that the battery pack is at a suitable working temperature.
[0006] The preferred technical solutions in many technical solutions provided by the utility model can produce many technical effects, which are described below.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:
[0008] The utility model provides a closed air-cooled battery pack, which comprises:
[0009] The box body is provided with a first air inlet on both side plates, a heat dissipation fan on the front end plate, and a second air inlet on the rear end plate.
[0010] The battery module is arranged in the box body, and comprises a steel belt and a plurality of battery cells.
[0011] The uniform temperature plate is arranged between the steel belt and the battery cell assembly.
[0012] The heat dissipation plate is arranged between two adjacent battery cells.
[0013] Preferably, the heat dissipation plate is provided with a heat dissipation air duct, and the heat dissipation air duct is in communication with the first air inlet.
[0014] Preferably, the heat dissipation air duct comprises:
[0015] A plurality of first heat dissipation air ducts form a heat dissipation air duct group.
[0016] Second heat dissipation air ducts are arranged on both sides of the heat dissipation air duct group, and a cross-sectional area of the second heat dissipation air duct is smaller than a cross-sectional area of the first heat dissipation air duct.
[0017] Preferably, the uniform temperature plate comprises at least a first uniform temperature plate and a second uniform temperature plate arranged on upper and lower ends of the battery module.
[0018] Preferably, the uniform temperature plate comprises a plurality of integrally formed main bodies and connecting bodies, each two adjacent main bodies are connected through the connecting body, a cross-sectional area of the connecting body is smaller than a cross-sectional area of the main body, and the connecting body is arranged on one side of the heat dissipation plate.
[0019] Preferably, a contact area of the connecting body with the battery module is not greater than a contact area of the steel belt with the battery module.
[0020] Preferably, a return type inflation micro-pipe with refrigerant is arranged in the uniform temperature plate.
[0021] Preferably, the second air inlet comprises at least an upper air inlet and a lower air inlet, and the upper air inlet and the lower air inlet are both strip-shaped holes arranged on the rear end plate in a height direction of the rear end plate.
[0022] Preferably, the battery module further comprises two end plates arranged at two ends of the battery cell assembly, and the end plates are connected with the bottom plate of the box body.
[0023] Preferably, the battery module comprises two groups, and the uniform temperature plate is arranged on one side of each group of the battery module.
[0024] The closed air-cooled battery pack comprises a box body, a battery module, a uniform temperature plate and a heat dissipation plate, an air inlet is arranged on a side wall of the box body, the battery module is arranged in the box body, and the battery module comprises a steel belt and a plurality of battery cells. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0026] Figure 1 is a structural schematic diagram of an explosion of an embodiment of the closed air-cooled battery pack of the present application;
[0027] Figure 2 is a structural schematic diagram of a battery module in the closed air-cooled battery pack of the present application;
[0028] Figure 3 is a structural schematic diagram of a heat dissipation plate in the closed air-cooled battery pack of the present application;
[0029] Figure 4 is a structural schematic diagram of a uniform temperature plate in the closed air-cooled battery pack of the present application.
[0030] In the figure: 1, box; 11, side plate; 110, first air inlet; 12, front end plate; 120, fan; 13, rear end plate; 130, second air inlet; 1301, upper air inlet; 1302, lower air inlet; 14, cover plate; 2, battery module; 21, steel belt; 22, battery cell; 3, uniform temperature plate; 301, first uniform temperature plate; 302, second uniform temperature plate; 31, main body; 32, connecting body; 4, heat dissipation plate; 40, heat dissipation air duct; 401, first heat dissipation air duct; 402, second heat dissipation air duct; 5, end plate. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0032] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0033] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0034] Figure 1 is the schematic diagram of the explosion structure of the embodiment, as Figure 1 indicated, the utility model provides a closed air-cooled battery pack, including box 1, battery module 2, uniform temperature plate 3 and heat sink 4.
[0035] Among them, the both side plates 11 of box 1 are provided with first air inlet 110, in the embodiment, a plurality of first air inlets 110 with the cross section of rounded rectangle are formed on the left and right side plates of box 1, for the heat dissipation of battery pack through the air inlet 110 and heat sink 4. The front end plate 12 of box 1 is provided with heat dissipation fan 120, and the rear end plate 13 of box 1 is provided with second air inlet 130. By setting heat dissipation fan 120 on the front end plate 12 of box 1 and second air inlet 130 on the rear end plate 13, the heat can be discharged from the battery pack by the action of fan 120, and better heat dissipation effect is achieved.
[0036] Battery module 2 is arranged in box 1, and battery module 2 includes steel belt 21 and a plurality of battery cells 22, the plurality of battery cells 22 form a battery cell assembly, and the battery cell assembly is fixed by the steel belt 21. Uniform temperature plate 3 is arranged between the steel belt 21 and the battery cell assembly. In the embodiment, the battery module 2 includes two groups, and the uniform temperature plate 3 is arranged on one side of the two groups of battery modules 2. In use, the heat generated by the battery module 2 is conducted to the uniform temperature plate 3.
[0037] Optionally, the temperature equalizing plate 3 in the embodiment at least includes a first temperature equalizing plate 301 and a second temperature equalizing plate 302 arranged on the upper and lower ends of the side surface of the battery module 2, and the first temperature equalizing plate 301 and the second temperature equalizing plate 302 are internally provided with a back-shaped inflation micro-pipe with refrigerant. The heat generated by the battery module 2 is conducted to the temperature equalizing plate 3, and the heat is taken away by the evaporation refrigeration of the refrigerant inside the temperature equalizing plate 3 and the circulation of the capillary material inside. In this way, the temperature equalizing performance of the closed air-cooled battery pack is better, and the heat inside the battery pack is efficiently transferred through the temperature equalizing plate 3 arranged on the side surface of the battery module 2, so as to achieve the purpose of low internal temperature difference and high temperature uniformity.
[0038] The heat dissipation plate 4 in the embodiment is arranged between two adjacent battery cells 22. Under the influence of the expansion force of the battery cells 22, three heat dissipation plates 4 are arranged in the battery module 2, and the two sides of the heat dissipation plate 4 are in close contact with the large surface of the battery cell 22. In this way, the heat dissipation performance is enhanced, and the heat dissipation plate between the large surfaces of the battery cells can effectively transfer the heat generated under different working conditions of the battery cells.
[0039] As an optional implementation, Figure 3 is a structural schematic diagram of the heat dissipation plate in the embodiment. As shown in Figure 3 , the heat dissipation plate 4 in the embodiment is internally provided with a heat dissipation air duct 40, and the heat dissipation air duct 40 is in communication with the first air inlet 110.
[0040] The heat dissipation air duct 40 includes a plurality of first heat dissipation air ducts 401 and second heat dissipation air ducts 402.
[0041] Specifically, the plurality of first heat dissipation air ducts 401 form a heat dissipation air duct group, and the second heat dissipation air ducts 402 are arranged on both sides of the heat dissipation air duct group. The cross-sectional area of the second heat dissipation air duct 402 is smaller than that of the first heat dissipation air duct 401.
[0042] In use, the heat generated by the battery cell 22 is first transferred to the heat dissipation plate 4 through heat conduction due to the large contact area with the heat dissipation plate 4. The air entering through the first air inlet 110 is taken away from the heat dissipation plate 4 in the form of convective exchange after passing through the second heat dissipation air duct 402 with a smaller cross-sectional area and the plurality of first heat dissipation air ducts 401 with a larger cross-sectional area.
[0043] As an optional implementation, Figure 4 is a structural schematic diagram of the temperature equalizing plate in the embodiment. As shown in Figure 4 , the temperature equalizing plate 3 includes a plurality of integrally formed main bodies 31 and connecting bodies 32. Every two adjacent main bodies 31 are connected through the connecting body 32. The cross-sectional area of the connecting body 32 is smaller than that of the main body 31, and the connecting body 32 is installed on one side of the heat dissipation plate 4.
[0044] Specifically, the contact area of the connecting body 32 with the battery module 2 is not greater than the contact area of the steel belt 21 with the battery module 2, the width dimension of the contact area of the connecting body 32 of the uniform temperature plate 3 with the battery module 2 is small, and the uniform temperature plate 3 avoids interfering with the heat dissipation plate 4 too much.
[0045] The uniform temperature plate 3 in the embodiment has a back-type micro-pipe internal structure, one side of the uniform temperature plate 3 abuts against the side surface of the battery cell 22 or the cross section of the heat dissipation plate 4, and the other side of the uniform temperature plate 3 is in close contact with the steel belt 21, so that heat can be transferred from a high-temperature position to a low-temperature position through the uniform temperature plate 3, thereby achieving a uniform temperature effect.
[0046] As an optional implementation, the second air inlet 130 at least includes an upper air inlet 1301 and a lower air inlet 1302, and the upper air inlet 1301 and the lower air inlet 1302 are both strip-shaped holes formed on the rear end plate 13 along the height direction of the rear end plate 13.
[0047] In the embodiment, the heat dissipation air duct 40 in the heat dissipation plate 4 is communicated with the first air inlet 110 to form a main air duct in the battery pack, the upper air inlet 1301 and the lower air inlet 1302 of the second air inlet 130 are communicated to form a secondary air duct in the battery pack, the secondary air duct and the main air duct are confluent at the position close to the uniform temperature plate 3, and finally the heat is discharged under the action of the fan, and the heat can be quickly discharged under the action of the fan 120.
[0048] As an optional implementation, the battery module 2 further includes two end plates 5, and the two end plates 5 are arranged at two ends of the battery cell assembly, and the end plate 5 is connected with the bottom plate of the box body 1. In the embodiment, the steel belt 21 is in contact with the end plate 5 at the front and rear ends of the battery module 2 and is fixed through the end plate 5, and the end plate 5 and the bottom plate of the box body 1 are fixed through bolts.
[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An enclosed air-cooled battery pack, characterized by, The application relates to a battery module and a battery module heat dissipation device. The battery module heat dissipation device comprises a box body, a battery module, a uniform temperature plate and a heat dissipation plate. The two side plates of the box body are provided with first air inlets, the front end plate of the box body is provided with a heat dissipation fan, and the rear end plate of the box body is provided with a second air inlet. The battery module is arranged in the box body and comprises a steel belt and a plurality of battery cells. The plurality of battery cells form a battery cell assembly, and the battery cell assembly is fixed by being enclosed by the steel belt.
2. The closed forced air battery pack of claim 1, wherein, The uniform temperature plate is arranged between the steel belt and the battery cell assembly.
3. The closed forced air-cooled battery pack of claim 2, wherein: The heat dissipation plate is arranged between two adjacent battery cells. The heat dissipation plate is provided with a heat dissipation air duct, and the heat dissipation air duct is communicated with the first air inlet. The heat dissipation air duct comprises a plurality of first heat dissipation air ducts forming a heat dissipation air duct group and a second heat dissipation air duct arranged on the two sides of the heat dissipation air duct group.
4. The closed forced air-cooled battery pack of any of claims 1-3, wherein: The cross-sectional area of the second heat dissipation air duct is smaller than that of the first heat dissipation air duct.
5. The closed forced air battery pack of claim 4, wherein: The uniform temperature plate comprises at least a first uniform temperature plate and a second uniform temperature plate arranged on the upper and lower ends of the side surface of the battery module.
6. The closed forced air battery pack of claim 5, wherein: The uniform temperature plate comprises a plurality of integrally formed main bodies and connecting bodies.
7. The closed forced air-cooled battery pack of any of claims 1-3, wherein: Every two adjacent main bodies are connected by the connecting bodies, the cross-sectional area of the connecting bodies is smaller than that of the main bodies, and the connecting bodies are arranged on one side of the heat dissipation plate.
8. The closed forced air-cooled battery pack of any of claims 1-3, wherein: The contact area of the connecting bodies with the battery module is not greater than the contact area of the steel belt with the battery module.
9. The closed forced air-cooled battery pack of any of claims 1-3, wherein: The uniform temperature plate is provided with a return type inflation micro-pipeline containing refrigerant.
10. The closed forced air-cooled battery pack of any of claims 1-3, wherein: The second air inlet comprises at least an upper air inlet and a lower air inlet. The upper air inlet and the lower air inlet are strip-shaped holes arranged on the rear end plate along the height direction of the rear end plate. The battery module further comprises two end plates arranged at the two ends of the battery cell assembly. The battery module comprises two groups, and the uniform temperature plate is arranged on one side of the two groups of battery modules. The application has the advantages that the battery module heat dissipation device can effectively improve the heat dissipation effect of the battery module, the battery module heat dissipation device is simple in structure, and the cost is low.