Air-cooling and liquid-cooling integrated energy storage cabinet

Abstract

The utility model discloses an air cooling and liquid cooling integrated energy storage cabinet, which belongs to the technical field of energy storage cabinets and comprises an energy storage cabinet body, a liquid cooling module, an air cooling module and an equipment bin are arranged in the body, an air duct is arranged between the air cooling module and the equipment bin, an air inlet of the air duct is communicated with an exhaust port of the equipment bin, and the air cooling module comprises a plurality of Pack assemblies. An air inlet channel and an air outlet channel are formed between the front end and the rear end of the Pack assembly and the body respectively, an air outlet of the air channel is communicated with the air inlet channel, a first valve capable of being opened and closed is arranged at the top of the air outlet channel, a second valve capable of being opened and closed is arranged at the top of the air inlet channel, and a third valve capable of being opened and closed is arranged at an air inlet of the air channel. And a fan is arranged in front of each Pack box and is used for sucking air in the air inlet channel into the Pack box. The liquid cooling module and the air duct are arranged in the energy storage cabinet, hot air produced by the equipment bin is used for heating the battery cells, and the problems that the temperature difference of the battery cells of the energy storage cabinet is large, energy density is small and energy is wasted are solved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage cabinet technology, specifically relating to an air-cooled and liquid-cooled integrated energy storage cabinet. Background Technology

[0002] With the rapid development of renewable energy and the construction of new power systems based on new energy sources, energy storage systems have become a key support for balancing energy supply and demand. Currently, the heat dissipation methods of existing energy storage cabinets are mainly air cooling and liquid cooling. Air cooling refers to removing heat from the surface of the equipment through airflow to achieve the purpose of cooling; liquid cooling refers to using liquid as a cooling medium, with circulating coolant removing the heat generated by the battery. The advantages of air-cooled energy storage cabinets are their simpler structure and lower energy consumption, while the advantages of liquid-cooled energy storage cabinets are smaller cell temperature differences and higher energy density.

[0003] However, both also have their drawbacks. When using air cooling, the temperature difference of the battery cells in the energy storage cabinet is large and the energy density is low. When using liquid cooling, the power consumption of the liquid chiller is large, and in low-temperature environments, the main energy consumption of the energy storage cabinet comes from the electric heating system of the liquid chiller. During operation, the heat of the energy storage converter will be directly transferred to the environment, resulting in energy waste.

[0004] Therefore, there is a need to provide an integrated air-cooled and liquid-cooled energy storage cabinet to overcome the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide an air-cooled and liquid-cooled integrated energy storage cabinet to solve the problems of large cell temperature difference, low energy density, high power consumption of liquid chiller and energy waste in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated air-cooled and liquid-cooled energy storage cabinet includes an energy storage cabinet body. The energy storage cabinet body contains a liquid-cooling module, an air-cooling module, and an equipment compartment. An air duct is formed between the air-cooling module and the equipment compartment. The air inlet of the air duct is connected to the exhaust outlet of the equipment compartment. The air-cooling module includes multiple pack components. An air intake channel is formed between the front end of each pack component and the energy storage cabinet body. The exhaust outlet of the air duct is connected to the air intake channel. An exhaust channel is formed between the rear end of each pack component and the energy storage cabinet body. A first openable and closable valve is provided at the top of the exhaust channel. A second openable and closable valve is provided at the top of the air intake channel. A third openable and closable valve is provided at the air inlet of the air duct. Each pack component includes multiple pack boxes. Each pack box contains a battery pack. A fan is provided at the front of each pack box. The fan is used to draw air from the air intake channel into the pack box.

[0008] The liquid cooling module includes a liquid chiller and multiple liquid cooling plates. The liquid inlet end of each liquid cooling plate is connected to the liquid outlet end of the liquid chiller, and the liquid outlet end of each liquid cooling plate is connected to the liquid extraction end of the liquid chiller. At least one liquid cooling plate is deployed in each Pack box, and at least one liquid cooling plate in each Pack box is installed on at least one surface of the battery pack.

[0009] As a further technical solution of this utility model, the battery pack in each Pack box includes: multiple battery cells and a battery pack steel strip that binds the multiple battery cells together. There are gaps between two adjacent battery cells and between the battery cells and the battery pack steel strip. The air drawn in by the fan flows along the gaps.

[0010] As a further technical solution of this utility model, a heat sink is provided in the gap around each battery cell, and the heat sink is provided with multiple airflow channels extending along the length of the gap.

[0011] As a further technical solution of this utility model, the gap between two adjacent cells is connected to the gap between the cell and the steel strip of the battery pack, and all gaps form an S-shaped heat dissipation channel.

[0012] As a further technical solution of this utility model, the first valve, the second valve and the third valve are all solenoid valves;

[0013] The energy storage cabinet body is also equipped with a control module, and the liquid chiller, fan, first valve, second valve and third valve are all electrically connected to the control module.

[0014] As a further technical solution of this utility model, the air-cooling module also includes multiple support frames, which are symmetrically arranged on the side wall inside the energy storage cabinet body, and the multiple Pack components are placed on the multiple support frames one by one.

[0015] As a further technical solution of this utility model, the Pack box is also provided with a battery pack positioning plate, and the battery pack is fixed in the Pack box by the battery pack positioning plate.

[0016] As a further technical solution of this utility model, the Pack assembly is further provided with a positive quick connector and a negative quick connector, the positive quick connector being electrically connected to the positive terminal of the battery pack, and the negative quick connector being electrically connected to the negative terminal of the battery pack.

[0017] As a further technical solution of this utility model, the equipment compartment is equipped with a high-voltage box and an energy storage converter, and a honeycomb-shaped air vent is opened on the outside of the energy storage converter.

[0018] As a further technical solution of this utility model, an air inlet and an air outlet are provided on the outside of the liquid chiller, and both the air inlet and the air outlet are designed in a honeycomb shape.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model, by setting up a liquid cooling module and an air cooling module, can switch the heat dissipation mode of the energy storage cabinet according to the actual needs when the cell temperature and the ambient temperature are different. When the air cooling mode is used, the power consumption of the liquid chiller can be reduced. When the ambient temperature is high and the cell temperature is low, the liquid cooling mode is used to avoid the problem of large temperature difference between the cells and low energy density in the energy storage cabinet.

[0021] 2. This utility model opens an air duct between the air-cooled module and the equipment compartment, and forms an air intake channel and an air exhaust channel between the Pack component and the energy storage cabinet. The exhaust port of the air duct is connected to the air intake channel, which facilitates the hot air generated in the equipment compartment to enter the air intake channel through the air duct and enter the Pack component from the air intake channel. The hot air heats the battery cell, realizes energy recovery, and avoids energy waste. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the air-cooled and liquid-cooled integrated energy storage cabinet in this embodiment;

[0023] Figure 2 This is a top view of the air-cooled module in this embodiment;

[0024] Figure 3 This is a structural diagram of the battery pack in this embodiment;

[0025] Figure 4 For this embodiment Figure 3 Enlarged view of a section at point B in the middle;

[0026] Figure 5 This is a schematic diagram of the PCS energy recovery mode in this embodiment;

[0027] Figure 6 This is a schematic diagram of the air-cooling mode in this embodiment;

[0028] Figure 7 This is a schematic diagram of the liquid cooling mode in this embodiment.

[0029] Reference numerals: 1. Liquid chiller; 2. Pack assembly; 21. Fan; 22. Fan screw; 23. Support frame; 31. High voltage box; 32. Energy storage converter; 4. Air duct; 51. First valve; 52. Second valve; 53. Third valve; 6. Battery cell; 71. Radiator; 72. Liquid cooling plate; 73. Battery pack steel strip; 81. Battery pack positioning plate; 82. Battery pack end cap screw. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0031] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0032] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0033] Example 1

[0034] like Figure 1 As shown, an integrated air-cooled and liquid-cooled energy storage cabinet includes an energy storage cabinet body. The energy storage cabinet body is provided with a liquid cooling module, an air-cooling module, and an equipment compartment. An air duct 4 is provided between the air-cooling module and the equipment compartment. The air inlet of the air duct 4 is connected to the exhaust outlet of the equipment compartment. The air-cooling module includes multiple Pack components 2. The front end of the Pack component 2 forms an air intake channel with the energy storage cabinet body. The exhaust outlet of the air duct 4 is connected to the air intake channel. The rear end of the Pack component 2 forms an exhaust channel with the energy storage cabinet body. A first valve 51 that can be opened and closed is provided at the top of the exhaust channel. A second valve 52 that can be opened and closed is provided at the top of the air intake channel. A third valve 53 that can be opened and closed is provided at the air inlet of the air duct 4. The Pack component 2 includes multiple Pack boxes. Each Pack box contains a battery pack. A fan 21 is provided in front of each Pack box. The fan 21 is used to draw air from the air intake channel into the Pack box.

[0035] The liquid cooling module includes a liquid chiller 1 and multiple liquid cooling plates 72. The liquid inlet end of each liquid cooling plate 72 is connected to the liquid outlet end of the liquid chiller 1, and the liquid outlet end of each liquid cooling plate 72 is connected to the liquid extraction end of the liquid chiller 1. At least one liquid cooling plate 72 is deployed in each pack box, and at least one liquid cooling plate 72 in each pack box is installed on at least one surface of the battery pack.

[0036] By adopting the above technical solution, an air duct 4 is opened between the air-cooled module and the equipment compartment, and an air intake channel and an exhaust channel are formed between the Pack component 2 and the energy storage cabinet body. The air intake channel is connected to the exhaust port of the air duct 4. The hot air generated by the equipment compartment during operation enters the Pack component 2 through the air duct 4 and the air intake channel, and flows to the battery pack through the fan 21 in the Pack component 2 to heat the battery pack and achieve energy recycling. In this way, the hot air generated by the equipment compartment is recovered to avoid energy loss and waste.

[0037] Example 2

[0038] like Figures 1-4 As shown, this embodiment provides an integrated air-cooled and liquid-cooled energy storage cabinet, including an energy storage cabinet body. The energy storage cabinet body contains a liquid-cooling module, an air-cooling module, and an equipment compartment. An air duct 4 is formed between the air-cooling module and the equipment compartment. The air inlet of the air duct 4 is connected to the exhaust outlet of the equipment compartment. The air-cooling module includes multiple pack components 2. The front end of each pack component 2 forms an air intake channel with the energy storage cabinet body, and the exhaust outlet of the air duct 4 is connected to the air intake channel. The rear end of each pack component 2 forms an exhaust channel with the energy storage cabinet body. A first, closable valve 51 is provided at the top of the exhaust channel, and a second, closable valve 52 is provided at the top of the air intake channel. The air inlet of the air duct 4 is provided with an openable and closable third valve 53. The Pack assembly 2 includes multiple Pack boxes, each Pack box contains a battery pack, and each Pack box is equipped with a fan 21 in front of it. The fan 21 is used to draw air from the air intake channel into the Pack box. The liquid cooling module includes a liquid chiller 1 and multiple liquid cooling plates 72. The liquid inlet end of each liquid cooling plate 72 is connected to the liquid outlet end of the liquid chiller 1, and the liquid outlet end of each liquid cooling plate 72 is connected to the liquid extraction end of the liquid chiller 1. At least one liquid cooling plate 72 is deployed in each Pack box, and at least one liquid cooling plate 72 in each Pack box is installed on at least one surface of the battery pack.

[0039] In one feasible implementation, the battery pack is fixedly installed in the Pack box by battery pack end cap screws. Each battery pack in the Pack box includes: multiple cells 6 and battery pack steel strip 73 that binds the multiple cells 6 together. There are gaps between two adjacent cells 6 and between cells 6 and battery pack steel strip 73. The air drawn in by the fan 21 flows along the gaps.

[0040] In one feasible implementation, a heat sink 71 is provided in the gap around each cell 6, and the heat sink 71 has a plurality of airflow channels extending along the length of the gap.

[0041] Specifically, the radiator 71 is made of a thermally conductive material with good thermal conductivity, such as a metal or carbon material.

[0042] In one feasible implementation, the gap between two adjacent cells 6 is connected to the gap between cell 6 and the battery pack steel strip 73, and all gaps form an S-shaped heat dissipation channel.

[0043] The gaps are interconnected and form an S-shaped heat dissipation channel, which increases the contact area of ​​the channel and facilitates heat exchange. The radiator 71 can improve the direction and distribution of airflow, improve the working efficiency of the energy storage cabinet, and reduce air resistance and noise during the flow process.

[0044] In one feasible implementation, the first valve 51, the second valve 52, and the third valve 53 are all solenoid valves; the energy storage cabinet body is also provided with a control module, and the liquid chiller 1, the fan 21, the first valve 51, the second valve 52, and the third valve 53 are all electrically connected to the control module.

[0045] In one feasible implementation, the Pack component 2 is further provided with a positive quick-connect connector and a negative quick-connect connector, the positive quick-connect connector being electrically connected to the positive terminal of the battery pack, and the negative quick-connect connector being electrically connected to the negative terminal of the battery pack.

[0046] Using positive and negative quick-connect connectors enables plug-and-play functionality, improves work efficiency, ensures power transmission, and guarantees the operation of the pack.

[0047] In one feasible implementation, the Pack box further includes a battery pack positioning plate 81, a battery pack end cap, and a battery pack end cap screw 82. The battery pack positioning plate 81 is fixedly disposed on both sides of the bottom of the Pack box, and the battery pack end cap is disposed on the front and rear sides of the battery pack. The battery pack end cap is fixedly disposed in the Pack box by the battery pack end cap screw 82.

[0048] In one feasible implementation, the equipment compartment is equipped with a high-voltage box 31 and an energy storage converter 32, and the energy storage converter 32 has a honeycomb-shaped air vent on its outer side.

[0049] Among them, the energy storage converter 32 adopts a forced air cooling method. A honeycomb-shaped air vent is opened on the outside of the energy storage converter 32. By accelerating the air flow, the hot air discharged during operation is transferred to the Pack box through the air duct 4.

[0050] In one feasible implementation, an air inlet and an air outlet are provided on the outside of the liquid chiller 1, and both the air inlet and the air outlet are configured in a honeycomb shape.

[0051] The air outlets are designed in a honeycomb pattern, which makes the distribution of air outlets more uniform, allowing air to enter the energy storage cabinet more evenly and making it easier for outside air to enter, thus effectively improving the efficiency of air intake and exhaust.

[0052] Working principle of this utility model:

[0053] (1) such as Figure 5 As shown in the figure, the arrows indicate the airflow direction. When the temperature of the battery cell 6 is less than 20°C, the control module controls the energy storage cabinet to enter the PCS energy recovery mode. At this time, the first valve 51 and the third valve 53 are opened, the liquid chiller 1 starts the heating mode, and the hot air produced by the energy storage converter 32 enters the air duct 4 through the third valve 53 and is sucked into the Pack box by the fan 21 to heat the battery cell 6. Then it is discharged into the external environment through the first valve 51.

[0054] (2) For example Figure 6 As shown in the figure, the arrows indicate the airflow direction. When the temperature of the battery cell 6 is between 20°C and 32°C and the ambient temperature is less than 30°C, the controller controls the energy storage cabinet to enter the air-cooling mode. At this time, the first valve 51 and the second valve 52 are opened, and the third valve 53 is closed. The cooling air from the outside is drawn into the Pack box through the second valve 52 under the action of the fan 21, and exchanges heat with the air-cooling heat sink in the Pack, carrying the heat of the battery cell 6 out of the Pack box and into the outside environment through the first valve 51.

[0055] (3) such as Figure 7 As shown in the figure, the arrows indicate the airflow direction. When the temperature of the battery cell 6 is between 20°C and 32°C and the ambient temperature is greater than or equal to 30°C, the controller controls the energy storage cabinet to enter the liquid cooling mode. At this time, the first valve 51, the second valve 52 and the third valve 53 are closed, the liquid chiller 1 works, and the liquid cooling plate 72 exchanges heat with the battery cell 6. The battery cell 6 is cooled by the flow of coolant.

[0056] (4) such as Figure 7 As shown in the figure, the arrows indicate the airflow direction. When the temperature of the battery cell 6 is greater than 32°C, the controller controls the energy storage cabinet to enter the liquid cooling mode. At this time, the first valve 51, the second valve 52 and the third valve 53 are closed, the liquid chiller 1 works, and the liquid cooling plate 72 exchanges heat with the battery cell 6. The battery cell 6 is cooled by the flow of coolant.

[0057] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An integrated air-cooled and liquid-cooled energy storage cabinet, comprising an energy storage cabinet body, characterized in that, The energy storage cabinet body is provided with a liquid cooling module, an air cooling module and an equipment compartment. An air duct (4) is provided between the air cooling module and the equipment compartment. The air inlet of the air duct (4) is connected to the exhaust port of the equipment compartment. The air cooling module includes multiple Pack components (2). An air intake channel is formed between the front end of the Pack component (2) and the energy storage cabinet body. The exhaust port of the air duct (4) is connected to the air intake channel. An exhaust channel is formed between the rear end of the Pack component (2) and the energy storage cabinet body. A first valve (51) that can be opened and closed is provided at the top of the exhaust channel. A second valve (52) that can be opened and closed is provided at the top of the air intake channel. A third valve (53) that can be opened and closed is provided at the air inlet of the air duct (4). The Pack component (2) includes multiple Pack boxes. Each Pack box contains a battery pack. A fan (21) is provided in front of each Pack box. The fan (21) is used to draw air from the air intake channel into the Pack box. The liquid cooling module includes a liquid chiller (1) and multiple liquid cooling plates (72). The liquid inlet end of each liquid cooling plate (72) is connected to the liquid outlet end of the liquid chiller (1), and the liquid outlet end of each liquid cooling plate (72) is connected to the liquid extraction end of the liquid chiller (1). At least one liquid cooling plate (72) is deployed in each Pack box, and at least one liquid cooling plate (72) in each Pack box is installed on at least one surface of the battery pack.

2. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, Each battery pack includes multiple cells (6) and a battery pack steel strip (73) that binds the multiple cells (6) together. There are gaps between two adjacent cells (6) and between the cells (6) and the battery pack steel strip (73). The air drawn in by the fan (21) flows along the gaps.

3. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 2, characterized in that, Each cell (6) is provided with a heat sink (71) in the gap around it, and the heat sink (71) is provided with a plurality of airflow channels extending along the length of the gap.

4. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 2, characterized in that, The gap between two adjacent cells (6) is connected to the gap between the cell (6) and the steel strip (73) of the battery pack, and all gaps form an S-shaped heat dissipation channel.

5. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, The first valve (51), the second valve (52), and the third valve (53) are all solenoid valves; The energy storage cabinet body is also equipped with a control module, and the liquid chiller (1), fan (21), first valve (51), second valve (52) and third valve (53) are all electrically connected to the control module.

6. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, The air-cooled module also includes multiple support frames (23), which are symmetrically arranged on the side wall inside the energy storage cabinet body. The multiple Pack components (2) are placed on the multiple support frames (23) one by one.

7. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, The Pack box is also equipped with a battery pack positioning plate (81), and the battery pack is fixed in the Pack box by the battery pack positioning plate (81).

8. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, The Pack assembly (2) is further provided with a positive quick connector and a negative quick connector. The positive quick connector is electrically connected to the positive terminal of the battery pack, and the negative quick connector is electrically connected to the negative terminal of the battery pack.

9. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, The equipment compartment is equipped with a high-voltage box (31) and an energy storage converter (32), and the energy storage converter (32) has a honeycomb-shaped air vent on its outside.

10. The air-cooled and liquid-cooled integrated energy storage cabinet according to claim 1, characterized in that, The liquid chiller (1) has an air inlet and an air outlet on its outside, and both the air inlet and the air outlet are honeycomb-shaped.

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