Air-cooled battery plug-in box for high-capacity energy storage

Abstract

The utility model relates to the technical field of energy storage batteries, and provides an air-cooled battery plug-in box for high-capacity energy storage, which comprises a shell, a first battery module and a second battery module, the first battery module and the second battery module are arranged side by side, and a gap is formed between the first battery module and the second battery module; each of the first battery module and the second battery module comprises a first battery cell group and a second battery cell group, the first battery cell group and the second battery cell group are arranged side by side and comprise a plurality of battery cells arranged in the thickness direction, and a harmonica-shaped tube plate is arranged between every two adjacent battery cells in the thickness direction of the battery cells; a heat insulation gasket is arranged between two adjacent battery cells along the width direction of the battery cells, the side wall of the shell is provided with a ventilation slot and a fan, the ventilation slot is arranged corresponding to the harmonica-shaped tube plate, the fan is arranged corresponding to the gap, and airflow enters the battery plug-in box along the ventilation slot, flows through the battery cells along the harmonica-shaped tube plate, flows to the gap and is discharged out of the plug-in box by the fan.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of energy storage battery, especially relates to a forced air cooling battery plug-in box for large capacity energy storage. BACKGROUND

[0002] At present, most energy storage products can be divided into air cooling, liquid cooling, phase change heat transfer and the like according to cooling modes, and the air cooling type product has the advantages of simple heat dissipation structure, small design difficulty and low cost, so the air cooling energy storage product is applied on a large scale, however, the air flow mode directly affects the heat dissipation effect of the air cooling battery, and further determines the service life, reliability and safety of the whole machine product.

[0003] At present, most of the batteries applied in large capacity energy storage products are square lithium batteries, a plurality of batteries are grouped to form a battery module, 2 to 3 modules are grouped to form a battery plug-in box, and different numbers of battery plug-in boxes form a battery cluster, and finally a plurality of battery clusters are grouped to form energy storage products with different capacities. The mainstream air cooling battery plug-in box is composed of 16 battery cells, with the development of the energy storage industry, there is a higher and higher requirement for the energy density of the product, the plug-in box product with 16 battery cells is insufficient in competitiveness, and the plug-in box composed of more battery cells becomes an inevitable trend and direction of the industry design, but the increase of the number of battery cells brings challenges to the overall heat dissipation and temperature uniformity of the single battery.

[0004] The utility model discloses a kind of forced air cooling battery plug-in box for large capacity energy storage to solve the above technical problem. INVENTION CONTENTS

[0005] The utility model provides a kind of forced air cooling battery plug-in box for large capacity energy storage, to solve the problem of poor overall heat dissipation and poor temperature uniformity of large capacity air cooling battery plug-in box.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of forced air cooling battery plug-in box for large capacity energy storage, including shell, first battery module and second battery module, the first battery module and second battery module are side by side and are provided with gap, the first battery module and second battery module all include first battery cell group and second battery cell group, the first battery cell group and second battery cell group are side by side and all include multiple battery cells arranged along the thickness direction, mouth organ tube plate is arranged between adjacent two battery cells along the thickness direction of battery cell, heat insulation gasket is arranged between adjacent two battery cells along the width direction of battery cell, the shell side wall is provided with ventilation slot and fan, the ventilation slot is set up to correspond mouth organ tube plate, the fan is set up to correspond gap, wherein, air current enters battery plug-in box along ventilation slot, flows through battery cell along mouth organ tube plate, and is discharged from plug-in box by fan.

[0007] On the basis of the above technical scheme, the number of battery cells in the first battery cell group and the second battery cell group is greater than or equal to 6.

[0008] On the basis of the above technical scheme, the number of the ventilation grooves is multiple, and the multiple ventilation grooves are sequentially and spacedly arranged along the arrangement direction of the battery cells.

[0009] On the basis of the above technical scheme, the multiple ventilation grooves are arranged in one-to-one correspondence with the harmonica tube plates and extend along the height direction of the battery cells.

[0010] On the basis of the above technical scheme, the air inlet areas of the multiple ventilation grooves are respectively matched with the internal airflow.

[0011] On the basis of the above technical scheme, the heat insulation pad is an aerogel sheet or a mica sheet.

[0012] On the basis of the above technical scheme, the air-cooled battery plug-in box for large-capacity energy storage further comprises a cover plate, the cover plate comprises a first cover plate and a second cover plate, and the first cover plate and the second cover plate are respectively arranged on the first battery cell group and the second battery cell group; the first cover plate and the second cover plate are downwardly extended with flanges in the circumferential direction; and the first cover plate or the second cover plate close to the gap is provided with a first notch at the flanges in the two ends along the arrangement direction of the battery cells.

[0013] On the basis of the above technical scheme, the first cover plate or the second cover plate close to the gap is provided with a second notch at the flanges, and the number of the second notches is multiple, and the multiple second notches are uniformly and spacedly distributed.

[0014] On the basis of the above technical scheme, the shell is provided with a first blocking strip and a second blocking strip, the first blocking strip is arranged at the gap and is arranged opposite to the fan, and the second blocking strip is arranged at the four corners of the shell.

[0015] On the basis of the above technical scheme, the air-cooled battery plug-in box for large-capacity energy storage further comprises a first end plate and a second end plate, the first end plate is arranged at the two ends of the first battery module along the arrangement direction of the battery cells, and the second end plate is arranged at the two ends of the second battery module along the arrangement direction of the battery cells.

[0016] Compared with the related art, the air-cooled battery plug-in box for large-capacity energy storage has the following beneficial effects:

[0017] The ventilation grooves are arranged, so that the airflow can enter the plug-in box through the ventilation grooves, carry away the heat generated by the adjacent two battery cells during work when flowing through the battery cells along the harmonica tube plate, and then flow to the gap and be discharged from the plug-in box by the fan, so that the heat dissipation effect of the battery cells in the battery module can be realized, and the temperature uniformity between the battery cells can be improved. Moreover, the two-row battery cell grouping mode is adopted in each battery module, so that the energy density of the battery plug-in box is improved, and the energy storage capacity of the battery plug-in box is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0018] 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 in the following description are only an embodiment of the present application, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0019] Figure 1 is an explosion structure schematic diagram of the air-cooled battery plug-in box provided by the present application;

[0020] Figure 2 is a structure schematic diagram of the cover plate of the air-cooled battery plug-in box provided by the present application;

[0021] Figure 3 is a structure schematic diagram of the shell of the air-cooled battery plug-in box provided by the present application;

[0022] Figure 4 is a structure schematic diagram of the battery module of the air-cooled battery plug-in box provided by the present application;

[0023] Figure 5 is a simulated surface temperature distribution schematic diagram of the battery module provided by the present application;

[0024] Figure 6 is a simulated air flow speed schematic diagram of the battery module provided by the present application;

[0025] Figure 7 is a simulated air flow direction schematic diagram of the battery module provided by the present application.

[0026] In the figure: 1, shell; 11, ventilation groove; 12, fan; 13, first blocking strip; 14, second blocking strip; 21, first battery module; 22, second battery module; 23, gap; 24, first battery cell group; 25, second battery cell group; 26, battery cell; 261, harmonica tube plate; 262, heat insulation gasket; 263, first end plate; 264, second end plate; 265, steel belt; 266, aluminum row; 267, copper row; 3, cover plate; 31, first cover plate; 32, second cover plate; 33, first gap; 34, second gap. DETAILED DESCRIPTION

[0027] The present application will be further described below in combination with the drawings and examples:

[0028] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, and should not be understood as a limitation of the present application.

[0029] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0031] In combination with Figures 1-4 As shown, the present disclosure provides a forced air cooling battery plug-in box for large capacity energy storage, comprising a shell 1, a first battery module 21 and a second battery module 22, the first battery module 21 and the second battery module 22 are arranged side by side and provided with a gap 23, the first battery module 21 and the second battery module 22 each comprise a first cell group 24 and a second cell group 25, the first cell group 24 and the second cell group 25 are arranged side by side and each comprise a plurality of cells 26 arranged along the thickness direction, a harmonica plate 261 is arranged between two adjacent cells 26 along the thickness direction of the cell 26, and a heat insulation pad 262 is arranged between two adjacent cells 26 along the width direction of the cell 26, the side wall of the shell 1 is provided with a ventilation groove 11 and a fan 12, the ventilation groove 11 is arranged corresponding to the harmonica plate 261, and the fan 12 is arranged corresponding to the gap 23, wherein the airflow enters the battery plug-in box along the ventilation groove 11, flows through the cell 26 along the harmonica plate 261, flows to the gap 23, and is discharged from the plug-in box by the fan 12.

[0032] The large-capacity air-cooled battery plug-in box provided by the embodiment of the present disclosure is provided with the ventilation groove 11, so that the airflow can enter the plug-in box through the ventilation groove 11, and when flowing through the electric core 26 along the harmonica tube plate 261, the heat generated by the adjacent two electric cores 26 during operation can be taken away, and then the airflow flows to the gap 23 and is discharged from the plug-in box by the fan 12. In this way, the heat dissipation effect of the electric core 26 in the battery module can be achieved, which is beneficial to improve the temperature uniformity between each electric core 26. Moreover, the two-row electric core 26 grouping mode is adopted in each battery module, which improves the energy density of the battery plug-in box and expands the energy storage capacity of the battery plug-in box.

[0033] On the basis of the above technical solution, the number of electric cores 26 in the first electric core group 24 and the second electric core group 25 is greater than or equal to 6. Preferably, the number of electric cores 26 in the first electric core group 24 and the second electric core group 25 can be 6-13.

[0034] Compared with most conventional battery plug-in boxes composed of 16 electric cores 26, the air-cooled battery plug-in box provided by the present application is composed of at least 24 electric cores 27, and can also be composed of 28, 32, 36, 40, 44, 48 or 52 electric cores 27. The number of electric cores 26 is increased, the energy density of the battery plug-in box is improved, and the overall heat dissipation effect and temperature uniformity can still be guaranteed.

[0035] On the basis of the above technical solution, as shown in Figure 1 and Figure 3 The number of ventilation grooves 11 is multiple, and the multiple ventilation grooves 11 are sequentially and spacedly arranged along the arrangement direction of the electric cores 26.

[0036] On the basis of the above technical solution, the multiple ventilation grooves 11 are arranged one by one corresponding to the harmonica tube plate 261 and extend along the height direction of the electric core 26.

[0037] The multiple ventilation grooves 11 are arranged along the arrangement direction of the electric core 26 and correspondingly arranged between the harmonica tube plate 261 between the electric cores 26, so that the airflow flowing into the battery plug-in box from the outside can enter the corresponding harmonica tube plate 261 more quickly, and the heat dissipation efficiency can be improved to a certain extent.

[0038] Optionally, the harmonica tube plate 261 between the corresponding electric cores 26 in the first electric core group 24 and the second electric core group 25 is connected in communication.

[0039] On the basis of the above technical solution, the air inlet areas of the multiple ventilation grooves 11 are respectively matched with the internal airflow flow.

[0040] Specifically, the size of each ventilation slot 11 is different, and the size of each ventilation slot 11 is adjusted according to the air flow in the shell 1. When the fan 12 is arranged at one end of the shell 1 at the gap 23, the air flow in the shell 1 will have a certain difference in size as the distance apart from the fan 12 is different, so the air inlet area of each ventilation slot 11 is adjusted according to the size of the air flow, so that the air flow at the plurality of ventilation slots 11 is similar, thereby improving the temperature uniformity between the plurality of battery cells 26 and improving the overall temperature uniformity of the battery box.

[0041] On the basis of the above technical scheme, the heat insulation pad 262 is an aerogel sheet or a mica sheet. The aerogel sheet or the mica sheet has high porosity and low thermal conductivity, and can withstand high temperature. When the battery cell 26 is in thermal runaway, it helps to block the spread of heat or reduce the speed of heat spread, thereby improving safety.

[0042] On the basis of the above technical scheme, as shown in Figure 2 The air-cooled battery box for large-capacity energy storage further comprises a cover plate 3, the cover plate 3 comprises a first cover plate 31 and a second cover plate 32, which are respectively arranged on the first battery cell group 24 and the second battery cell group 25, and the first cover plate 31 and the second cover plate 32 extend downward with flanges in the circumferential direction, and the first cover plate 31 or the second cover plate 32 near the gap 23 is provided with a first notch 33 at both ends of the flange along the arrangement direction of the battery cell 26.

[0043] On the basis of the above technical scheme, the first cover plate 31 or the second cover plate 32 near the gap 23 is provided with a second notch 34 at both ends of the flange, and the number of the second notch 34 is multiple, and the multiple second notches 34 are uniformly distributed.

[0044] Specifically, here the first battery cell group 24 of the first battery module 21 and the second battery module 22 is arranged near the two sides of the battery box, and the second battery cell group 25 is arranged near the middle of the battery box. Since the two second battery cell groups 25 are arranged between the two first battery cell groups 24, the temperature of the battery cell 26 of the second battery cell group 25 is higher than that of the first battery cell group 24. Therefore, the corresponding two second cover plates 32 are provided with a first notch 33 at both ends of the flange along the arrangement direction of the battery cell 26, so that the air flow in this direction is larger and the flow rate is faster, thereby improving the heat dissipation effect. The corresponding two second cover plates 32 are provided with a second notch 34 at the flange near the gap 23, which is conducive to the circulation of the top air flow of the two second battery cell groups 25, and the overall temperature uniformity is better.

[0045] On the basis of the above technical scheme, as shown in Figure 3 The shell 1 is provided with a first blocking strip 13 and a second blocking strip 14, the first blocking strip 13 is arranged at the gap 23 and is arranged opposite to the fan 12, and the second blocking strip 14 is arranged at the four corners of the shell 1.

[0046] The arrangement of the first baffle 13 and the second baffle 14 can block the airflow entering the battery plug-in box to a certain extent, so that the airflow can flow along a predetermined route, and the heat dissipation effect of each position can be ensured, and the temperature uniformity between the battery cells 26 can be improved.

[0047] On the basis of the above technical solution, as shown in Figure 4 the air-cooled battery plug-in box for large-capacity energy storage further comprises a first end plate 263 and a second end plate 264, the first end plate 263 is arranged at both ends of the first battery module 21 along the arrangement direction of the battery cells 26, and the second end plate 264 is arranged at both ends of the second battery module 22 along the arrangement direction of the battery cells 26.

[0048] On the basis of the above technical solution, as shown in Figure 4 the battery module further comprises a steel belt 265, the steel belt 265 is circumferentially tied to the battery cells 26 and the end plates, the positive and negative poles of the adjacent two battery cells 26 are connected in sequence through an aluminum row 266, the positive and negative poles of the first battery cell group 24 and the second battery cell group 25 and the first battery module 21 and the second battery module 22 are connected in sequence through a copper row 267, and a series system is formed.

[0049] In order to verify the temperature uniformity of the air-cooled battery plug-in box provided in the application, fluid mechanics (CFD) simulation software is used to simulate the surface temperature distribution of the battery module, and the simulated surface temperature diagram is as shown in Figure 5 Figure 5 In order to simulate the surface temperature distribution of the first battery module 21, the temperature difference between each battery cell 26 is 2-3℃, which is greatly reduced compared with the traditional battery module, so it is proved that the air-cooled battery plug-in box improves the temperature uniformity between the battery cells 26.

[0050] In order to verify the effect of the first gap 33 and the second gap 34 of the cover plate 3 on the temperature uniformity, CFD simulation software is used to simulate the airflow speed and direction near the cover plate 3, Figure 6 for the airflow speed nephogram between the cover plate 3 and the battery module, it can be seen that the airflow speed at the first gap 33 and the second gap 34 is obviously greater than that at other positions, Figure 7 for the airflow flow direction between the cover plate 3 and the battery module, it can be seen that the airflow at the first gap 33 and the second gap 34 obviously enters between the battery cells 26 to exchange heat, so as to improve the overall temperature uniformity.

[0051] The utility model has been described above by way of example, but the utility model is not limited to the above-mentioned specific embodiments, and any modification or modification based on the utility model belongs to the scope of protection required by the utility model.​

Claims

1. A forced air battery cabinet for high capacity energy storage, characterized in that, The battery insertion box comprises a shell, a first battery module and a second battery module, the first battery module and the second battery module are arranged side by side and are provided with a gap, the first battery module and the second battery module each comprise a first cell group and a second cell group, the first cell group and the second cell group are arranged side by side and each comprise a plurality of cells arranged in the thickness direction, a harmonica plate is arranged between two adjacent cells in the thickness direction of the cell, and a heat insulation gasket is arranged between two adjacent cells in the width direction of the cell, the side wall of the shell is provided with a ventilation groove and a fan, the ventilation groove is arranged corresponding to the harmonica plate, and the fan is arranged corresponding to the gap, wherein the airflow enters the battery insertion box along the ventilation groove, flows through the cells along the harmonica plate, flows to the gap, and is discharged from the insertion box by the fan.

2. The air-cooled battery cabinet for mass energy storage of claim 1, wherein, The number of cells in the first cell group and the second cell group is greater than or equal to 6.

3. The air-cooled battery cabinet for mass energy storage of claim 1, wherein, The number of ventilation grooves is a plurality, and the plurality of ventilation grooves are arranged in sequence and are spaced apart in the arrangement direction of the cells.

4. The air-cooled battery cabinet for mass energy storage of claim 3, wherein, The plurality of ventilation grooves are arranged corresponding to the harmonica plate one by one and extend in the height direction of the cells.

5. The air-cooled battery cabinet for mass energy storage of claim 3, wherein, The air inlet area of the plurality of ventilation grooves is respectively matched with the internal airflow.

6. The air-cooled battery cabinet for mass energy storage according to any one of claims 1 to 5, characterized in that, The heat insulation gasket is an aerogel sheet or a mica sheet.

7. The air-cooled battery cabinet for mass energy storage according to any one of claims 1 to 5, wherein, Further comprising a cover plate, the cover plate comprises a first cover plate and a second cover plate, which are respectively arranged on the first cell group and the second cell group, the first cover plate and the second cover plate are circumferentially extended downward with flanges, and the first cover plate or the second cover plate near the gap is provided with a first notch at both ends of the flange in the arrangement direction of the cells.

8. The air-cooled battery cabinet for mass energy storage of claim 7, wherein, The flange of the first cover plate or the second cover plate near the gap is provided with a second notch, and the number of the second notch is a plurality, and the plurality of second notches are uniformly distributed.

9. The air-cooled battery cabinet for mass energy storage according to any one of claims 1 to 5, wherein, The shell is provided with a first baffle and a second baffle, the first baffle is arranged in the gap and is arranged opposite to the fan, and the second baffle is arranged at the four corners of the shell.

10. The air-cooled battery cabinet for mass energy storage according to any one of claims 1 to 5, wherein, Further comprising a first end plate and a second end plate, the first end plate is arranged at both ends of the first battery module in the arrangement direction of the cells, and the second end plate is arranged at both ends of the second battery module in the arrangement direction of the cells.

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