Method for carrying out air cooling on energy storage pack

Abstract

The invention discloses a method for air-cooling an energy storage pack, which comprises the following steps: air-conditioning cold air enters a bottom air duct formed between the bottom of a battery module and a bottom plate from an air inlet, and is in direct contact with the bottom of the battery module for heat exchange; cold air of the air conditioner moves forwards to a first notch along the side air duct and then is blown out upwards from an air supply outlet formed in a supporting piece to enter the lower half part of the side air duct formed between the side part of the battery module and a side plate of the shell, and then the cold air of the air conditioner moves forwards to the first notch along the side air duct and is blown out from the first notch to enter the upper half part of the side air duct formed between the battery module and the side plate of the shell; air conditioner cold air moves backwards to a second notch along the side air duct and is blown out from the second notch to enter the rear part of a top air duct formed by the battery module and the top plate of the shell; and finally, the cold air of the air conditioner moves forwards along the top air duct and is blown to the air outlet, so that the top of the battery module and the ccs (Cell Contact System) are cooled.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery energy storage, and in particular relates to a method for air cooling an energy storage pack. Background Art

[0002] In the field of energy storage, battery modules are usually installed in a pack structure. However, with the increasing demand for battery module capacity in industry, the modules contained in the pack structure will be composed of multiple batteries connected in series. Although the battery capacity of the module has increased, the heat generation has also increased, which has a great adverse effect on the battery life and normal use. However, the existing cooling method for long modules usually adopts direct cooling, with cold air entering from the rear end of the pack structure and air exiting from the front end. However, this cooling method results in poor cooling effect on the battery, large temperature difference between batteries, large air volume loss of cold air, and high cooling cost. Therefore, there is an urgent need for a method for air cooling of energy storage packs. Summary of the invention

[0003] The present invention is mainly to overcome the deficiencies of the prior art and provides a method for air cooling an energy storage pack.

[0004] The present invention is achieved through the following technical solutions:

[0005] A method for air cooling an energy storage pack, comprising a pack box, the box comprising a bottom plate, a top plate, a rear plate, a front plate and two side plates; the front plate and the rear plate are respectively mounted on the front and rear ends of the bottom plate, the two side plates are respectively mounted on the left and right sides of the bottom plate, and the top plate is mounted on top of the front plate and the rear plate;

[0006] Inside the box, support sheets for supporting the battery module are respectively arranged on the left and right sides of the bottom plate, and there is a gap between the support sheets and the bottom plate; an air inlet is arranged at the middle or lower part of the rear plate for taking air into the bottom air duct formed between the bottom of the battery module and the bottom plate; an air supply port is opened on the support sheet for discharging air to the side air duct formed between the side of the battery module and the side plate of the box; an air outlet is arranged at the upper part of the front panel for discharging air from the top air duct formed between the top of the battery module and the top plate;

[0007] A guide structure is arranged in the side air duct formed between the side of the battery module and the side plate of the box body, and the guide structure includes a front guide bar, a rear guide bar, a middle guide bar and a top guide bar; wherein the front guide bar and the rear guide bar are respectively vertically installed at the front and rear ends of the support sheet and extend upward to the top of the battery module; the middle guide bar is transversely arranged between the front guide bar and the rear guide bar, and its rear end is connected to the rear guide bar, and its front end is provided with a first notch with the front guide bar, so as to form an air outlet for the upper part of the side air duct; the top guide bar is transversely arranged between the front guide bar and the rear guide bar and is located at the top of the battery module, its front end is connected to the front guide bar, and its rear end is provided with a second notch with the rear guide bar, so as to form an air outlet for the rear end air inlet of the top air duct;

[0008] The method for air cooling the energy storage pack is as follows: air-conditioned cold air enters the bottom air duct formed between the bottom of the battery module and the bottom plate from the air inlet, and directly performs heat exchange on the bottom contact of the battery module; then the air-conditioned cold air is blown upward from the air supply port opened on the support plate, and enters the lower half of the side air duct formed between the side of the battery module and the side plate of the shell, and then the air-conditioned cold air moves forward along the side air duct to the first notch, and blows out from the first notch into the upper half of the side air duct formed by the battery module and the side plate of the shell; then the air-conditioned cold air moves backward along the side air duct to the second notch, and blows out from the second notch into the rear of the top air duct formed by the battery module and the top plate of the shell; finally, the air-conditioned cold air moves forward along the top air duct and blows toward the air outlet, thereby cooling the top of the battery module and the CCS (Cells Contact System, integrated busbar).

[0009] In the above technical solution, a fan for sucking air is installed at the air outlet.

[0010] In the above technical solution, a first supporting column and a second supporting column are respectively installed above the bottom plate at the front and rear ends of the supporting sheet.

[0011] In the above technical solution, a wire outlet is arranged on the top of the front panel, a wind shield is arranged on the rear side of the front panel, and bolts are installed on the side of the front panel, thereby realizing the installation of the front panel and the side panels.

[0012] In the above technical solution, when multiple columns of battery modules are arranged in the box, in order to allow air to enter the middle air duct formed by the gaps between adjacent columns of battery modules, a support sheet is also arranged at the bottom of the adjacent battery modules, and the air supply port of the support sheet corresponds to the middle air duct formed between the adjacent columns of battery modules.

[0013] In the above technical solution, a flow guide structure is also provided in the middle air duct.

[0014] In the above technical solution, the guide structure includes a front guide bar, a rear guide bar, a middle guide bar, and a top guide bar; wherein the front guide bar and the rear guide bar are respectively vertically installed at the front and rear ends of the support plate and extend upward to the top of the battery module; the middle guide bar is transversely arranged between the front guide bar and the rear guide bar, and its rear end is connected to the rear guide bar, and its front end is provided with a first gap with the front guide bar, thereby forming an air outlet for the upper part of the middle air duct; the top guide bar is transversely arranged between the front guide bar and the rear guide bar and is located at the top of the battery module, its front end is connected to the front guide bar, and its rear end is provided with a second gap with the rear guide bar, thereby forming an air outlet for the rear end air intake of the top air duct.

[0015] In the above technical solution, the material of the flow-guiding structure is foam.

[0016] The advantages and beneficial effects of the present invention are:

[0017] (1) The air-conditioned cold air enters the bottom air duct formed between the bottom of the battery module and the bottom plate from the air inlet, and directly exchanges heat with the bottom contact of the battery module; then it is blown upward from the air supply port opened on the support plate, and enters the lower half of the side air duct formed between the side of the battery module and the side plate of the shell, and then the air-conditioned cold air moves forward along the side air duct to the first notch, and blows out from the first notch into the upper half of the side air duct formed by the battery module and the side plate of the shell; then the air-conditioned cold air moves backward along the side air duct to the second notch, and blows out from the second notch into the rear part of the top air duct formed by the battery module and the top plate of the shell; finally, the air-conditioned cold air moves forward along the top air duct and blows toward the air outlet, thereby cooling the top of the battery module and the CCS (Cells Contact System, integrated busbar), thereby forming a multi-dimensional cooling effect on the battery module.

[0018] (2) Compared with the traditional cooling structure with air intake at the rear and air outlet at the front, the maximum temperature of the module after completing a 0.5C charge and discharge is 36.1°C, which is 2.8°C lower than the maximum temperature. The maximum temperature difference is 16°C, which is 0.2°C lower, meeting the design requirements.

[0019] (3) The air guide structure of the present invention can guide the air-conditioning cold air blowing toward the side air duct and the middle air duct into an S-shaped motion trajectory, which has better temperature uniformity and allows the cold air to take away more heat; at the same time, the air-conditioning cold air is concentrated and guided to the rear of the top air duct formed by the battery module and the top plate of the shell, and the air-conditioning cold air is then blown out from the air outlet located at the rear of the top air duct, thereby enabling the air-conditioning cold air to have a more sufficient heat exchange with the top of the battery module.

[0020] (4) The top of the front panel of the present invention is provided with a wire outlet to prevent air leakage; at the same time, a wind shield is provided on the rear side of the front panel to prevent the formation of vortexes; and bolts are installed on the side of the front panel to achieve the installation of the front panel with the left panel and the right panel, making the front side of the front panel beautiful.

[0021] (5) The present invention adopts a strip-shaped support sheet to support the bottom two sides of the battery module instead of adopting a plate-shaped structure to support the entire bottom of the battery module. This structural design can reduce production costs. At the same time, after the air-conditioning cold air enters the bottom air duct formed between the bottom of the battery module and the bottom plate from the air inlet, the air-conditioning cold air can directly contact the bottom of the battery module for heat exchange, which has a better cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the present invention.

[0023] Figure 2 It is a rear view of the present invention.

[0024] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the internally removed battery module of the present invention.

[0026] Figure 5 It is an internal cross-sectional view of the present invention.

[0027] Figure 6 It is a schematic diagram of wind distribution of the present invention.

[0028] In the figure, the bottom plate 1, the top plate 2, the back plate 3, the front panel 4, the side plate 5, the first supporting column 6.1, the second supporting column 6.2, the supporting plate 6.3, the air inlet 6.4, the air supply port 6.5, the air outlet 7, the guide structure 8, the front guide bar 8.1, the rear guide bar 8.2, the middle guide bar 8.3, the top guide bar 8.4, the battery module 9, the wind shield 10, the CCS (Cells Contact System, integrated busbar) 11, the outlet 12, the fan 13, the first notch a, the second notch b, and the bolt c.

[0029] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0030] Embodiment 1

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0032] A method for air cooling the energy storage pack, see attached Figure 1 -Attached Figure 2 , including a pack box body, which includes a bottom plate 1, a top plate 2, a back plate 3, a front panel 4 and two side panels 5; the front panel 4 and the back plate 3 are respectively installed on the front and rear ends of the bottom plate 1, the two side panels 6 are respectively installed on the left and right sides of the bottom plate 1, and the top plate 2 is installed on the top of the front panel 4 and the back plate 3.

[0033] See attached Figure 3 -Attached Figure 4 Inside the box, support sheets 6.3 for supporting the battery module 9 are respectively arranged on the left and right sides of the bottom plate 1, and there is a gap between the support sheet 6.3 and the bottom plate 1; the support sheet 6.3 is used to support the two sides of the bottom of the battery module 9, and at the same time, the battery module 9 is erected to a certain height, so that the gap between the bottom of the battery module 9 and the bottom plate 1 forms a bottom air duct. The middle or lower part of the rear plate 3 is provided with an air inlet 6.4 for entering the bottom air duct formed between the bottom of the battery module 9 and the bottom plate 1. The present invention adopts a strip-shaped support sheet 6.3 to support the two sides of the bottom of the battery module 9 instead of using a plate-shaped structure to support the bottom of the entire battery module 9. This structural design can reduce production costs. At the same time, after the air conditioning cold air enters the bottom air duct formed between the bottom of the battery module 9 and the bottom plate 1 from the air inlet 6.4, the air conditioning cold air can directly contact the bottom of the battery module 9 for heat exchange, which has a better cooling effect. When the battery module 9 is placed on the support sheet 6.3, the gap between the side of the battery module 9 and the side plate 5 of the box body forms a side air duct; when the battery module 9 is placed on the support sheet 6.3, the gap between the side of the battery module 9 and the side plate 5 of the box body forms a side air duct, and the support sheet 6.3 is provided with an air supply port 6.5 for discharging air to the side air duct formed between the side of the battery module 9 and the side plate 5 of the box body, so that the air-conditioned cold air of the bottom air duct can be supplied to the side air duct through the air supply port 6.5. The upper part of the front panel is provided with an air outlet 7 for discharging air from the top air duct formed between the top of the battery module 9 and the top plate 2 (see attached Figure 1 ).

[0034] A guide structure 8 is provided in the side air duct formed between the side of the battery module 9 and the side plate 5 of the box body, and the guide structure 8 includes a front guide bar 8.1, a rear guide bar 8.2, a middle guide bar 8.3, and a top guide bar 8.4; wherein the front guide bar 8.1 and the rear guide bar 8.2 are respectively vertically installed at the front and rear ends of the support sheet 6.3 and extend upward to the top of the battery module 9; the middle guide bar 8.3 is horizontally arranged between the front guide bar 8.1 and the rear guide bar 8.4. The top guide bar 8.4 is laterally arranged between the front guide bar 8.1 and the rear guide bar 8.2 and is located at the top of the battery module 9, with its front end connected to the front guide bar 8.1 and its rear end being connected to the rear guide bar 8.2, and a second gap b being arranged at its front end and the rear guide bar 8.2, thereby forming an outlet for the rear air inlet of the top air duct.

[0035] The method for air cooling the energy storage pack is as follows: air-conditioning cold air enters the bottom air duct formed between the bottom of the battery module 9 and the bottom plate 1 from the air inlet 6.4, and directly contacts the bottom of the battery module 9 for heat exchange; then the air-conditioning cold air is blown upward from the air supply port 6.5 opened on the support sheet 6.3, and enters the lower half of the side air duct formed between the side of the battery module 9 and the side plate 5 of the shell, and then the air-conditioning cold air moves forward along the side air duct to the first gap a, and blows out from the first gap a into the upper half of the side air duct formed by the battery module 9 and the side plate of the shell; then the air-conditioning cold air moves backward along the side air duct to the second gap b, and blows out from the second gap b into the rear part of the top air duct formed by the battery module and the top plate of the shell; finally, the air-conditioning cold air moves forward along the top air duct and blows toward the air outlet 7, thereby cooling the top of the battery module 9 and the ccs (Cells Contact System, integrated busbar) 11.

[0036] Preferably, a fan 13 for sucking air is installed at the air outlet 7 (see attached Figure 1 ).

[0037] Preferably, a first supporting column 6.1 and a second supporting column 6.2 are respectively installed at the front and rear ends of the supporting sheet 6.3 above the bottom plate 1.

[0038] Preferably, a wire outlet 12 is provided on the top of the front panel 4 (see FIG. Figure 5 ) to prevent air leakage.

[0039] Preferably, a windshield 10 is provided at the rear side of the front panel 4 (see attached Figure 5 ) to prevent the formation of eddy currents.

[0040] Preferably, bolts c are installed on the side of the front panel 4 to achieve the installation of the front panel 4 and the side panel 5, making the front of the front panel beautiful (see attached Figure 3 ).

[0041] Embodiment 2

[0042] When multiple columns of battery modules 9 are arranged in the box, in order to let air into the middle air duct formed by the gaps between adjacent columns of battery modules 9, support sheets 6.3 are also arranged at the bottom of adjacent battery modules 9, and the air supply ports 6.5 of the support sheets 6.3 correspond to the middle air duct formed between adjacent columns of battery modules 9.

[0043] A guide structure 8 is provided in the middle air duct formed between the battery modules 9 in adjacent rows, and the guide structure 8 includes a front guide bar 8.1, a rear guide bar 8.2, a middle guide bar 8.3, and a top guide bar 8.4; wherein the front guide bar 8.1 and the rear guide bar 8.2 are respectively vertically installed at the front and rear ends of the support sheet 6.3 and extend upward to the top of the battery module 9; the middle guide bar 8.3 is horizontally arranged between the front guide bar 8.1 and the rear guide bar 8. .2, and its rear end is connected to the rear guide bar 8.2, and its front end is provided with a first gap a with the front guide bar 8.1, thereby forming an air outlet for the upper part of the middle air duct; the top guide bar 8.4 is laterally arranged between the front guide bar 8.1 and the rear guide bar 8.2 and is located at the top of the battery module 9, its front end is connected to the front guide bar 8.1, and its rear end is provided with a second gap b with the rear guide bar 8.2, thereby forming an air outlet for the rear end air inlet of the top air duct.

[0044] The air conditioning cold air enters the bottom air duct formed between the bottom of the battery module 9 and the bottom plate 1 from the air inlet 6.4, and directly contacts the bottom of the battery module 9 for heat exchange; then it is blown upward from the air supply port 6.5 opened on the support sheet 6.3, and enters the lower half of the side air duct formed between the side of the battery module 9 and the side plate 5 of the shell, and the lower half of the middle air duct formed between the battery modules 9 in adjacent rows; then the air conditioning cold air moves forward along the side air duct and the middle air duct to the first notch a, blows out from the first notch a, and enters the battery module 9 and the upper part of the side air duct formed by the side panels of the shell and the upper part of the middle air duct formed between the adjacent rows of battery modules 9; then the air-conditioned cold air moves backward along the side air duct and the middle air duct to the second gap b, and blows out from the second gap b into the rear part of the top air duct formed by the battery module and the top plate of the shell; finally, the air-conditioned cold air moves forward along the top air duct and blows toward the air outlet 7, thereby cooling the top of the battery module 9 and the CCS (Cells Contact System, integrated busbar) 11.

[0045] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0046] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0047] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A method for air cooling an energy storage pack, characterized in that: The pack box comprises a bottom plate, a top plate, a back plate, a front plate and two side plates; the front plate and the back plate are respectively mounted on the front and rear ends of the bottom plate, the two side plates are respectively mounted on the left and right sides of the bottom plate, and the top plate is mounted on the top of the front plate and the back plate; Inside the box, support sheets for supporting the battery module are respectively arranged on the left and right sides of the bottom plate, and there is a gap between the support sheets and the bottom plate; an air inlet is arranged at the middle or lower part of the rear plate for taking air into the bottom air duct formed between the bottom of the battery module and the bottom plate; an air supply port is opened on the support sheet for discharging air to the side air duct formed between the side of the battery module and the side plate of the box; an air outlet is arranged at the upper part of the front panel for discharging air from the top air duct formed between the top of the battery module and the top plate; A guide structure is arranged in the side air duct formed between the side of the battery module and the side plate of the box body, and the guide structure includes a front guide bar, a rear guide bar, a middle guide bar and a top guide bar; wherein the front guide bar and the rear guide bar are respectively vertically installed at the front and rear ends of the support sheet and extend upward to the top of the battery module; the middle guide bar is transversely arranged between the front guide bar and the rear guide bar, and its rear end is connected to the rear guide bar, and its front end is provided with a first notch with the front guide bar, so as to form an air outlet for the upper part of the side air duct; the top guide bar is transversely arranged between the front guide bar and the rear guide bar and is located at the top of the battery module, its front end is connected to the front guide bar, and its rear end is provided with a second notch with the rear guide bar, so as to form an air outlet for the rear end air inlet of the top air duct; The method for air cooling the energy storage pack is as follows: air conditioning cold air enters the bottom air duct formed between the bottom of the battery module and the bottom plate from the air inlet, and directly contacts the bottom of the battery module for heat exchange; Then the air is blown upward from the air supply port opened on the supporting plate and enters the lower half of the side air duct formed between the side of the battery module and the side plate of the shell. Then the air-conditioned cold air moves forward along the side air duct to the first notch and blows out from the first notch into the upper half of the side air duct formed by the battery module and the side plate of the shell. Then the air-conditioned cold air moves backward along the side air duct to the second notch and blows out from the second notch into the rear part of the top air duct formed by the battery module and the top plate of the shell. Finally, the air-conditioned cold air moves forward along the top air duct and blows toward the air outlet, thereby cooling the top of the battery module and the CCS (Cells Contact System, integrated busbar).

2. The method for air cooling an energy storage pack according to claim 1, characterized in that: A fan for sucking air is installed at the air outlet.

3. The method for air cooling an energy storage pack according to claim 1, characterized in that: A first supporting column and a second supporting column are respectively installed at the front and rear ends of the supporting sheet above the bottom plate.

4. The method for air cooling an energy storage pack according to claim 1, characterized in that: The top of the front panel is provided with a wire outlet, the rear side of the front panel is provided with a wind shield, and the side of the front panel is provided with bolts, so as to realize the installation of the front panel and the side panel.

5. The method for air cooling an energy storage pack according to claim 1, characterized in that: When multiple rows of battery modules are arranged in the box, support sheets are also arranged at the bottoms of adjacent battery modules, and air outlets are opened on the support sheets for discharging air to the middle air duct formed between adjacent rows of battery modules.

6. The method for air cooling an energy storage pack according to claim 5, characterized in that: A flow guide structure is also arranged in the middle air duct.

7. The method for air cooling an energy storage pack according to claim 6, characterized in that: The guide structure includes a front guide bar, a rear guide bar, a middle guide bar, and a top guide bar; wherein the front guide bar and the rear guide bar are respectively vertically installed at the front and rear ends of the support plate and extend upward to the top of the battery module; the middle guide bar is transversely arranged between the front guide bar and the rear guide bar, and its rear end is connected to the rear guide bar, and its front end is provided with a first gap with the front guide bar, thereby forming an air outlet for the upper part of the middle air duct; the top guide bar is transversely arranged between the front guide bar and the rear guide bar and is located at the top of the battery module, its front end is connected to the front guide bar, and its rear end is provided with a second gap with the rear guide bar, thereby forming an air outlet for the rear end air inlet of the top air duct.

8. The method for air cooling an energy storage pack according to claim 1, characterized in that: The material of the flow-guiding structure is foam.

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