Energy storage battery box and energy storage system

Abstract

The embodiment of the invention provides an energy storage battery box and an energy storage system, and relates to the technical field of energy storage. The energy storage battery box comprises a box body, a battery module and a turbine structure, cooling liquid is contained in the box body, a first refrigerant flow channel is formed in the box body, and a refrigerant capable of circularly flowing is contained in the first refrigerant flow channel; the battery module is arranged in the box body and is immersed in the cooling liquid; the turbine structure is rotatably arranged on the box body, one part of the turbine structure is located in the first refrigerant flow channel, and the other part of the turbine structure is located in the cooling liquid; and the refrigerant is used for exchanging heat with the cooling liquid through the inner wall of the box body, and the refrigerant is further used for driving the turbine structure to rotate relative to the box body in the flowing process in the first refrigerant flow channel so as to disturb the cooling liquid. The whole structure of the system can be simplified, the energy consumption is reduced, the heat exchange resistance is small, and the heat dissipation efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to an energy storage battery box and an energy storage system. BACKGROUND

[0002] At present, the heat management methods of the energy storage system mainly include air cooling, liquid cooling and phase change cooling technologies, among which the liquid cooling technology has become the most widely used heat management scheme due to its good cooling performance. The heat generated by the battery during operation is effectively dissipated through heat exchange between the cooling liquid in the liquid cooling plate and the battery module. The liquid cooling system usually includes two independent circulating cooling circuits: the first circuit is a cooling liquid circulating circuit, and the cooling liquid carries away the heat generated by the battery by convective heat exchange with the battery module when flowing through the liquid cooling plate; the second circuit is a refrigerant circulating circuit, in which the cooling liquid that has absorbed heat enters the plate heat exchanger and exchanges heat with the refrigerant, and the refrigerant changes from liquid to gas, thereby absorbing the heat in the cooling liquid; then, the gaseous refrigerant is cooled and recondensed into liquid in the condenser, completing the cycle.

[0003] However, this liquid cooling method has a double-circulation structure, resulting in a relatively complex overall system structure, and has the problems of large heat transfer resistance, low heat dissipation efficiency and high energy consumption. SUMMARY

[0004] The purpose of the present application is to provide an energy storage battery box and an energy storage system, which simplifies the overall structure of the system, reduces energy consumption, and has small heat transfer resistance and high heat dissipation efficiency.

[0005] The embodiments of the present application are implemented as follows: In a first aspect, the present application provides an energy storage battery box, comprising: a box body, the inside of the box body containing a cooling liquid, and the box body being provided with a first refrigerant flow channel containing a circulating refrigerant; a battery module, the battery module being arranged in the box body and immersed in the cooling liquid; and a turbine structure, the turbine structure being rotatably arranged in the box body, and a part of the turbine structure being located in the first refrigerant flow channel and another part of the turbine structure being located in the cooling liquid; wherein the refrigerant is used to exchange heat with the cooling liquid through the inner wall of the box body, and the refrigerant is also used to drive the turbine structure to rotate relative to the box body to disturb the cooling liquid during the flow of the refrigerant in the first refrigerant flow channel.

[0006] In an optional embodiment, the turbine structure comprises a first turbine, a rotating shaft and a second turbine connected in sequence, the first turbine is arranged in the first refrigerant flow channel, the rotating shaft is rotatably arranged on the inner wall of the box body, and the second turbine is arranged in the cooling liquid.

[0007] In an optional embodiment, the radius of the first turbine is smaller than the radius of the second turbine.

[0008] In an optional embodiment, the energy storage battery box further comprises a baffle structure arranged in the box body and forming a battery accommodating space with the box body, and the battery module is arranged in the battery accommodating space. The baffle structure is provided with a plurality of flow-through holes through which the cooling liquid flows into the battery accommodating space.

[0009] In an optional embodiment, the energy storage battery box further comprises a first liquid inlet connector and a first liquid outlet connector, the first liquid inlet connector and the first liquid outlet connector are arranged on opposite sides of the box body and are in communication with the first refrigerant flow channel. The number of turbine structures is two, and the two turbine structures are arranged on opposite sides of the box body and are arranged correspondingly with the first liquid inlet connector and the first liquid outlet connector.

[0010] In an optional embodiment, the first refrigerant flow channel comprises a first sub-flow channel, a first mounting space, a second sub-flow channel and a second mounting space connected in sequence and in communication with each other, the first mounting space is in communication with the first liquid inlet connector, and the second mounting space is in communication with the first liquid outlet connector; a part of the two turbine structures is arranged in the first mounting space and the second mounting space, respectively. The height of one end of the first sub-flow channel in communication with the first mounting space is different from the height of one end of the second sub-flow channel in communication with the first mounting space; the height of one end of the first sub-flow channel in communication with the second mounting space is different from the height of one end of the second sub-flow channel in communication with the second mounting space.

[0011] In an optional embodiment, the box body comprises a bottom plate, an inner shell and an outer shell, the battery module is arranged on the bottom plate and located in the inner shell; the inner shell is arranged on the bottom plate and located in the outer shell, the cooling liquid is contained in the cooling liquid containing space formed between the inner shell and the bottom plate; the outer shell is arranged on the bottom plate and forms the first refrigerant flow channel with the inner shell and the bottom plate. The first liquid inlet connector and the first liquid outlet connector are respectively arranged on opposite sides of the outer shell, and the two turbine structures are respectively arranged on opposite sides of the inner shell.

[0012] In an optional embodiment, a second refrigerant flow channel is arranged in the bottom plate, and the second refrigerant flow channel contains circulating refrigerant. The energy storage battery box further comprises a second liquid inlet connector and a second liquid outlet connector, two ends of the second liquid inlet connector are respectively communicated with the second refrigerant flow channel and the first liquid inlet connector, and two ends of the second liquid outlet connector are respectively communicated with the second refrigerant flow channel and the first liquid outlet connector.

[0013] In a second aspect, the present application provides an energy storage system, comprising a direct cooling system and the energy storage battery box of any one of the preceding embodiments, the direct cooling system being communicated with the first refrigerant flow channel and used for conveying circulating refrigerant to the first refrigerant flow channel.

[0014] In an optional embodiment, the energy storage system further comprises an energy storage cabinet, the number of the energy storage battery boxes is multiple, and the multiple energy storage battery boxes are arranged in the energy storage cabinet, and the direct cooling system is simultaneously communicated with the first refrigerant flow channels of the multiple energy storage battery boxes.

[0015] The beneficial effects of the embodiments of the present application include: The energy storage battery box comprises a box body, a battery module and a turbine structure, the inside of the box body contains cooling liquid, and the box body is provided with a first refrigerant flow channel containing circulating refrigerant; the battery module is arranged in the box body and is immersed in the cooling liquid; the turbine structure is rotatably arranged in the box body, and a part of the turbine structure is located in the first refrigerant flow channel and another part of the turbine structure is located in the cooling liquid; wherein the refrigerant is used for heat exchange with the cooling liquid through the inner wall of the box body, and the refrigerant is also used for driving the turbine structure to rotate relative to the box body in the process of flowing in the first refrigerant flow channel to disturb the cooling liquid.

[0016] It is easy to understand that the cooling liquid can be directly in contact with the battery module to absorb the heat generated by the battery module during operation, and the heat exchange efficiency is high, and the cooling liquid passes through the inner wall of the box to indirectly transmit the heat to the refrigerant in the first refrigerant flow channel; since the refrigerant circulates in the first refrigerant flow channel, the heat generated by the battery module can be taken away by the reciprocating circulation. At the same time, the refrigerant can also drive the turbine structure to rotate during circulation, so that the turbine structure properly disturbs the cooling liquid in the box, which can increase the heat exchange area of the cooling liquid with the battery module and the inner wall of the box, and promote the heat distribution in the cooling liquid to be more uniform, thereby improving the heat dissipation efficiency. That is, the energy storage battery box only uses a cooling circuit of circulating refrigerant, which reduces one cooling circulation circuit compared with the existing two circulation circuits, thereby simplifying the overall structural complexity of the system, reducing the heat exchange resistance, and reducing the energy consumption accordingly; and the turbine structure is driven by the flowing refrigerant, without the need for additional power elements to rotate, thereby further reducing the energy consumption, simplifying the overall structure of the system, and improving the heat dissipation efficiency.

[0017] The energy storage system comprises an energy storage battery box, which has all the beneficial effects of the energy storage battery box. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The structural schematic diagram of the energy storage system provided by the embodiment of the present application is shown in the figure. Figure 2 The structural schematic diagram of the energy storage battery box provided by the embodiment of the present application is shown in the figure. Figure 3 The sectional view of the energy storage battery box provided by the embodiment of the present application is shown in the figure. Figure 4 The exploded view of the energy storage battery box provided by the embodiment of the present application is shown in the figure. Figure 5 The partial structural schematic diagram of the energy storage battery box provided by the embodiment of the present application is shown in the figure. Figure 6 The schematic diagram of the turbine structure provided by the embodiment of the present application is shown in the figure. Figure 7 The assembly schematic diagram of the baffle structure and the box provided by the embodiment of the present application is shown in the figure. Figure 8 The exploded view of the box provided by the embodiment of the present application is shown in the figure. Figure 9The first view assembly schematic diagram of the inner shell and the turbine structure provided by the embodiment of the present application is shown in the figure. Figure 10 The second view assembly schematic diagram of the inner shell and the turbine structure provided by the embodiment of the present application is shown in the figure.

[0020] Figure: 1000-energy storage system; 100-energy storage battery box; 10-box body; 11-first refrigerant flow channel; 111-first sub-flow channel; 112-first mounting space; 113-second sub-flow channel; 114-second mounting space; 12-bottom plate; 121-second refrigerant flow channel; 13-inner shell; 14-outer shell; 15-cooling liquid containing space; 16-upper cover; 20-battery module; 30-turbine structure; 31-first turbine; 32-rotating shaft; 33-second turbine; 40-baffle structure; 41-first baffle; 42-second baffle; 43-third baffle; 44-flow-through hole; 50-battery containing space; 61-first liquid inlet connector; 62-first liquid outlet connector; 71-second liquid inlet connector; 72-second liquid outlet connector; 200-direct cooling system; 201-first liquid inlet pipe; 202-first liquid outlet pipe; 203-first electronic expansion valve; 204-liquid storage tank; 205-condenser; 206-compressor; 207-heat exchanger; 208-second electronic expansion valve; 209-first electromagnetic valve; 210-second electromagnetic valve; 211-second liquid inlet pipe; 212-second liquid outlet pipe; 213-branch pipe; 300-energy storage cabinet. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0023] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] As described in the background, the current liquid cooling method of the energy storage system generally includes two independent circulating cooling circuits: the first circuit is a cooling liquid circulating circuit, and the cooling liquid carries away the heat generated by the battery when flowing through the liquid cooling plate through convective heat exchange with the battery module; the second circuit is a refrigerant circulating circuit, and the cooling liquid that has absorbed heat enters the plate heat exchanger and exchanges heat with the refrigerant, and the refrigerant changes from liquid to gas, thereby absorbing the heat in the cooling liquid; then the gaseous refrigerant is cooled and recondensed into liquid in the condenser, completing the cycle. However, this liquid cooling method has a double-circulation structure, resulting in a relatively complex overall system structure, and has the problems of large heat transfer resistance, low heat dissipation efficiency and high energy consumption.

[0028] Based on this, please refer to Figures 1-10 The embodiments of the present application provide a kind of energy storage battery box 100 and energy storage system 1000, which can effectively improve the technical problems mentioned above, i.e.

[0029] Please refer to Figure 1 ,Figure 1 A structural schematic diagram of the energy storage system 1000 is provided for the present embodiment, which is combined with Figure 1 The energy storage system 1000 includes an energy storage battery box 100 and a direct cooling system 200, the energy storage battery box 100 is connected with the direct cooling system 200, and the direct cooling system 200 is used for heat dissipation of heat generated by the energy storage battery box 100.

[0030] Specifically, please refer to Figures 2-5 , Figure 2 A structural schematic diagram of the energy storage battery box 100 is provided for the present embodiment, Figure 3 A sectional view of the energy storage battery box 100 is provided for the present embodiment, Figure 4 An exploded view of the energy storage battery box 100 is provided for the present embodiment, Figure 5 A partial structural schematic diagram of the energy storage battery box 100 is provided for the present embodiment.

[0031] Combined with Figures 2-5 The energy storage battery box 100 includes a box body 10, a battery module 20 and a turbine structure 30. The inside of the box body 10 contains cooling liquid, and the box body 10 is provided with a first refrigerant flow channel 11, and the first refrigerant flow channel 11 contains circulating refrigerant; the battery module 20 is arranged in the box body 10 and is immersed in the cooling liquid; the turbine structure 30 is rotatably arranged in the box body 10, and a part of the turbine structure 30 is located in the first refrigerant flow channel 11, and another part of the turbine structure 30 is located in the cooling liquid. Among them, the refrigerant is used to exchange heat with the cooling liquid through the inner wall of the box body 10, and the refrigerant is also used to drive the turbine structure 30 to rotate relative to the box body 10 in the process of flowing in the first refrigerant flow channel 11, so as to disturb the cooling liquid.

[0032] It is easy to understand that the cooling liquid can directly contact the battery module 20 to absorb the heat generated in the working process, and the heat exchange efficiency is high, and the cooling liquid passes through the inner wall of the box body 10 to indirectly transfer the heat to the refrigerant in the first refrigerant flow channel 11; Because the refrigerant circulates in the first refrigerant flow channel 11, it can circulate back and forth to take away the heat generated by the battery module 20. At the same time, the refrigerant can also drive the turbine structure 30 to rotate in the process of circulating flow, so that the turbine structure 30 properly disturbs the cooling liquid in the box body 10, which can increase the heat exchange area of the cooling liquid with the battery module 20 and the inner wall of the box body 10, promote the heat distribution in the cooling liquid to be more uniform, thereby improving the heat dissipation efficiency.

[0033] That is, the energy storage battery box 100 only adopts a cooling loop of circulating refrigerant, compared with the existing two circulating loops, one cooling circulating loop is reduced, thereby simplifying the overall structural complexity of the system, reducing the heat exchange resistance, and reducing the energy consumption accordingly; and the turbine structure 30 is pushed by the flowing refrigerant, without the need for additional power elements to rotate, thereby further reducing the energy consumption, simplifying the overall structure of the system, and improving the heat dissipation efficiency.

[0034] Please combine Figures 1-5 The direct cooling system 200 communicates with the first refrigerant flow channel 11 and is used for delivering the circulating refrigerant to the first refrigerant flow channel 11. Specifically, the direct cooling system 200 includes a first liquid inlet pipe 201, a first electronic expansion valve 203, a liquid storage tank 204, a condenser 205, a compressor 206 and a first liquid outlet pipe 202 which are sequentially communicated, and the first liquid inlet pipe 201 and the first liquid outlet pipe 202 both communicate with the first refrigerant flow channel 11, thereby realizing the circulation of the refrigerant.

[0035] For those skilled in the art, it is easy to know that the compressor 206 compresses the gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant to provide power for the circulation of the refrigerant; the condenser 205 condenses the high-temperature and high-pressure gaseous refrigerant into high-temperature and high-pressure liquid refrigerant; and the first electronic expansion valve 203 can throttle and depressurize the high-temperature and high-pressure liquid refrigerant delivered from the liquid storage tank 204 to make it into low-temperature and low-pressure liquid refrigerant. In this way, the low-temperature and low-pressure liquid refrigerant enters the first refrigerant flow channel 11 through the first liquid inlet pipe 201, and then exchanges heat with the cooling liquid through the inner wall of the box body 10 to take away the heat of the cooling liquid; in this process, the liquid refrigerant absorbs heat and vaporizes into gaseous refrigerant, which then flows to the compressor 206 through the first liquid outlet pipe 202 for the next cycle.

[0036] Further, in order to exchange heat and refrigerate the refrigerant which becomes high-temperature gaseous refrigerant after exchanging heat through the first refrigerant flow channel 11, to improve the heat exchange efficiency. In this embodiment, the direct cooling system 200 further includes a branch pipe 213 and a second electronic expansion valve 208 and a heat exchanger 207 arranged on the branch pipe 213, one end of the branch pipe 213 is connected between the liquid storage tank and the condenser 205, and the other end of the branch pipe 213 is connected to the first liquid outlet pipe 202. That is, the high-temperature and high-pressure liquid refrigerant formed after being treated by the condenser 205, a part of which flows through the second electronic expansion valve 208 to throttle and depressurize, and then exchanges heat through the heat exchanger 207 to realize refrigeration, and then flows to the compressor 206.

[0037] To better control the flow of the pipeline in the direct cooling system 200, in the embodiment, the direct cooling system 200 further comprises a first electromagnetic valve 209 and a second electromagnetic valve 210, the first electromagnetic valve 209 is arranged in the branch pipe 213, and the second electromagnetic valve 210 is arranged in the first liquid outlet valve.

[0038] Please continue to combine Figure 1 To improve the energy density of the energy storage system 1000, the number of the energy storage battery boxes 100 is multiple, the energy storage system 1000 further comprises an energy storage cabinet 300, the multiple energy storage battery boxes 100 are arranged in the energy storage cabinet 300, and the direct cooling system 200 is in communication with the first refrigerant flow channels 11 of the multiple energy storage battery boxes 100 at the same time.

[0039] Specifically, the direct cooling system 200 further comprises a second liquid inlet pipe 211 and a second liquid outlet pipe 212, the second liquid inlet pipe 211 and the second liquid outlet pipe 212 are arranged in the energy storage cabinet 300, the second liquid inlet pipe 211 is in communication with the first refrigerant flow channels 11 of the multiple battery boxes 10 at the same time, the second liquid outlet pipe 212 is in communication with the first refrigerant flow channels 11 of the multiple battery boxes 10 at the same time, the first liquid inlet pipe 201 is in communication with the second liquid inlet pipe 211, and the first liquid outlet pipe 202 is in communication with the second liquid outlet pipe 212.

[0040] Please refer to Figure 6 , Figure 6 The schematic view of the turbine structure 30 provided in the embodiment, combined with Figures 2-6 The turbine structure 30 comprises a first turbine 31, a rotating shaft 32 and a second turbine 33 connected in sequence, the first turbine 31 is arranged in the first refrigerant flow channel 11, the rotating shaft 32 is rotatably arranged on the inner wall of the battery box 10, and the second turbine 33 is arranged in the cooling liquid.

[0041] That is to say, the refrigerant can drive the first turbine 31 to rotate in the process of flowing in the first refrigerant flow channel 11, so that the rotating shaft 32 rotates relative to the battery box 10 and drives the second turbine 33 to rotate, thereby appropriately disturbing the cooling liquid in the battery box 10, promoting the heat distribution in the cooling liquid to be more uniform, and improving the heat dissipation efficiency.

[0042] Further, in the embodiment, the radius of the first turbine 31 is smaller than the radius of the second turbine 33. Through such an arrangement, firstly, the first turbine 31 and the second turbine 33 rotate at the same angular velocity, and since the second turbine 33 has a larger radius, the linear velocity of the blades thereof is greater at the same angular velocity, and a greater torque can be generated; in this way, the second turbine 33 can more effectively disturb the cooling liquid, thereby increasing the heat exchange area and further improving the heat dissipation efficiency. Secondly, the radius of the first turbine 31 is small, so that it is more easily accelerated in the flowing refrigerant and responds more quickly, reducing the starting resistance and inertial loss; and the torque of the first turbine 31 is small, so that the rotating shaft 32 and the second turbine 33 can be prevented from bearing excessive mechanical stress, and the stable operation of the turbine structure 30 can be ensured, prolonging the service life.

[0043] It should be noted that the energy storage battery box 100 provided in the embodiment can be understood as a cooling mode combining static immersion cooling and direct cooling. Specifically, the battery module 20 is immersed in the cooling liquid, and the cooling liquid in the box body 10 is not connected to the external circulation system and is not dynamically circulated and flowed. It can be understood as a relatively static cooling mode. Only under the disturbance of the turbine structure 30, the cooling liquid will flow appropriately in the box body 10. Thus, the temperature difference of the battery module 20 caused by uneven flow field distribution during the circulation of the existing dynamic cooling liquid is avoided, and the impact of the circulation of the cooling liquid on the battery module 20 in different degrees is avoided, so that irreversible damage to the battery module 20 is avoided.

[0044] According to the above description, since the turbine structure 30 provided in the embodiment disturbs the cooling liquid appropriately, in order to reduce the impact of the fluid on the battery module 20 during the disturbance of the cooling liquid and to ensure the stable operation of the battery module 20 and improve the operation safety of the energy storage battery box 100, the energy storage battery box 100 further comprises a baffle structure 40. Figure 4 and Figure 5 The baffle structure 40 is arranged in the box body 10 and covers the battery module.

[0045] Specifically, please refer to Figure 7 , Figure 7 The assembly diagram of the baffle structure 40 provided in the embodiment and the box body 10 is provided, and Figure 5 and Figure 7 The baffle structure 40 and the box body 10 form a battery accommodating space 50 therebetween, and the battery module 20 is arranged in the battery accommodating space 50. The baffle structure 40 is provided with a plurality of flow-through holes 44, and the cooling liquid flows into the battery accommodating space 50 through the plurality of flow-through holes 44.

[0046] Further, the baffle structure 40 comprises a first baffle 41, a second baffle 42 and a third baffle 43 connected in sequence, the first baffle 41 is arranged opposite to the third baffle 43, and the second baffle 42 is arranged spaced apart from the bottom of the box body 10. A plurality of flow-through holes 44 are arranged on the first baffle 41, the second baffle 42 and the third baffle 43.

[0047] Please continue to combine Figure 5 The energy storage battery box 100 further comprises a first liquid inlet connector 61 and a first liquid outlet connector 62, which are arranged on opposite sides of the box body 10 and are in communication with the first refrigerant flow channel 11. The number of turbine structures 30 is two, and two turbine structures 30 are arranged on opposite sides of the box body 10 and are arranged correspondingly with the first liquid inlet connector 61 and the first liquid outlet connector 62.

[0048] Combine Figure 1 And Figure 5 In this embodiment, the second liquid inlet pipe 211 is in communication with the first liquid inlet connectors 61 of a plurality of energy storage battery boxes 100 at the same time, and the second liquid outlet pipe 212 is in communication with the first liquid outlet connectors 62 of a plurality of energy storage battery boxes 100 at the same time.

[0049] By arranging the first liquid inlet connector 61 and the first liquid outlet connector 62 on opposite sides of the box body 10, the flow path of the refrigerant can be increased, and the heat exchange effect with the cooling liquid can be improved. Moreover, the turbine structure 30 is arranged as two, which are correspondingly arranged with the first liquid inlet connector 61 and the first liquid outlet connector 62, that is, when the refrigerant enters the first refrigerant flow channel 11, it first drives the first turbine 31 of the turbine structure 30 on that side to rotate, and then flows through the peripheral wall of the box body 10 and converges at the first liquid outlet connector 62, continuing to drive the first turbine 31 of the other turbine structure 30 on that side to rotate, in this way, the disturbance effect of the turbine on the cooling liquid can be improved, and the heat dissipation efficiency can be further improved.

[0050] It should be noted that in other embodiments, the number of turbine structures 30 can also be one, three or four, etc., and the specific arrangement position of the plurality of turbine structures 30 can also be adjusted according to actual needs. For example, when the number of turbine structures 30 is four, the four turbine structures 30 can be arranged around the box body 10, of course, two turbine structures 30 can also be arranged on opposite sides, etc.

[0051] Please refer to Figure 8 , Figure 8 The explosion view of the box body 10 provided in this embodiment, combined with Figure 4 And Figure 8, the box 10 includes a bottom plate 12, an inner shell 13 and an outer shell 14. The battery module 20 is arranged on the bottom plate 12 and located in the inner shell 13; the inner shell 13 is arranged on the bottom plate 12 and located in the outer shell 14, a cooling liquid containing space 15 is formed between the inner shell 13 and the bottom plate 12, and the cooling liquid is contained in the cooling liquid containing space 15; the outer shell 14 is arranged on the bottom plate 12 and forms a first refrigerant flow channel 11 with the inner shell 13 and the bottom plate 12. Wherein, the first liquid inlet joint 61 and the first liquid outlet joint 62 are arranged on the opposite sides of the outer shell 14 respectively, and two turbine structures 30 are arranged on the opposite sides of the inner shell 13 respectively.

[0052] Further, the box 10 further includes an upper cover 16, the upper cover 16 is connected with the inner shell 13 and the outer shell 14 at the same time, so as to seal the cooling liquid containing space 15 and ensure the stable operation of the energy storage battery box 100.

[0053] Combined with Figure 3 , Figure 5 and Figure 8 , in order to further improve the heat exchange effect of the battery module 20, the second refrigerant flow channel 121 is arranged in the bottom plate 12, and the second refrigerant flow channel 121 contains the circulating refrigerant. The energy storage battery box 100 further includes a second liquid inlet joint 71 and a second liquid outlet joint 72, the two ends of the second liquid inlet joint 71 are respectively communicated with the second refrigerant flow channel 121 and the first liquid inlet joint 61, and the two ends of the second liquid outlet joint 72 are respectively communicated with the second refrigerant flow channel 121 and the first liquid outlet joint 62.

[0054] It is easy to understand that the refrigerant in the second refrigerant flow channel 121 can exchange heat with the bottom of the battery module 20 through the inner wall of the bottom plate 12 on the one hand, and can exchange heat with the cooling liquid through the inner wall of the bottom plate 12 on the other hand, so as to effectively improve the overall heat exchange effect and heat dissipation efficiency, and further improve the overall operation safety of the energy storage battery box 100.

[0055] It should be noted that the number of the first refrigerant flow channel 11 and the second refrigerant flow channel 121 can be set to be multiple, for example, multiple first refrigerant flow channels 11 can be arranged at intervals to cover the entire contact part of the inner shell 13 and the cooling liquid; and multiple second refrigerant flow channels 121 can also be arranged at intervals to cover the entire contact part of the bottom plate 12 and the cooling liquid, so as to further improve the heat dissipation effect.

[0056] Please refer to Figure 9 and Figure 10 , Figure 9 the assembly schematic view of the first perspective of the inner shell 13 and the turbine structure 30 provided in the embodiment, Figure 10 the assembly schematic view of the second perspective of the inner shell 13 and the turbine structure 30 provided in the embodiment.

[0057] Combined withFigure 5 、 Figure 9 and Figure 10 The first refrigerant flow channel 11 includes a first sub-flow channel 111, a first installation space 112, a second sub-flow channel 113 and a second installation space 114 which are sequentially connected in a head-to-tail manner. The first installation space 112 is communicated with the first liquid inlet joint 61, and the second installation space 114 is communicated with the first liquid outlet joint 62. A part of the two turbine structures 30 is arranged in the first installation space 112 and the second installation space 114 respectively. In the embodiment, the first turbine 31 of one of the turbine structures 30 is arranged in the first installation space 112, and the first turbine 31 of the other turbine structure 30 is arranged in the second installation space 114.

[0058] The height of the end of the first sub-flow channel 111 communicated with the first installation space 112 is different from the height of the end of the second sub-flow channel 113 communicated with the first installation space 112. The height of the end of the first sub-flow channel 111 communicated with the second installation space 114 is different from the height of the end of the second sub-flow channel 113 communicated with the second installation space 114.

[0059] As shown in Figure 9 , in the embodiment, the height of the end of the first sub-flow channel 111 located in the first installation space 112 is greater than the height of the end of the second sub-flow channel 113 located in the first installation space 112. That is, the refrigerant entering the first installation space 112 through the first liquid inlet joint 61 flows in the A1 direction and the B1 direction shown in Figure 9 respectively, so as to enter the first sub-flow channel 111 and the second sub-flow channel 113 respectively. In this way, the first turbine 31 located at the first liquid inlet joint 61 can be driven to rotate counterclockwise.

[0060] Similarly, as shown in Figure 10 , in the embodiment, the height of the end of the first sub-flow channel 111 located in the second installation space 114 is greater than the height of the end of the second sub-flow channel 113 located in the second installation space 114. That is, the refrigerant flows in the A2 direction and the B2 direction shown in Figure 10 respectively through the first sub-flow channel 111 and the second sub-flow channel 113 after being divided, and then converges into the second installation space 114. In this way, the first turbine 31 located at the first liquid outlet joint 62 can be driven to rotate clockwise.

[0061] It should be noted that by setting such an inlet and outlet liquid mode with a height difference, the rotation of the first turbine 31 is also slowed down, and the flow rate of the refrigerant at the first installation space 112 and the second installation space 114 is reduced, so that the flow rate of the refrigerant in the first refrigerant flow channel 11 is appropriately reduced, and the refrigerant can be fully heat-exchanged with the cooling liquid, thereby improving the heat dissipation efficiency. In addition, the rotation speed of the two first turbines 31 can be improved, and the second turbine 33 can be better driven to disturb the cooling liquid, thereby improving the heat exchange uniformity of the battery module 20.

[0062] In summary, the embodiments of the present application provide a kind of energy storage battery box 100 and energy storage system 1000, energy storage battery box 100 includes box 10, battery module 20 and turbine structure 30, the inside of box 10 contains cooling liquid, and first refrigerant flow channel 11 is arranged on box 10, and first refrigerant flow channel 11 contains the refrigerant that can circulate flow;Battery module 20 is arranged in box 10, and is immersed in cooling liquid;Turbine structure 30 is rotatably arranged in box 10, and a part of turbine structure 30 is located in first refrigerant flow channel 11, another part of turbine structure 30 is located in cooling liquid;Wherein, the refrigerant is used to heat exchange with cooling liquid by the inner wall of box 10, and the refrigerant is also used to drive turbine structure 30 to rotate relative to box 10 in the process of flowing in first refrigerant flow channel 11, to disturb cooling liquid.

[0063] Cooling liquid can be directly contacted with battery module 20, and absorb the heat generated in the working process thereof, and the heat exchange efficiency is high, and cooling liquid passes through the inner wall of box 10, and indirectly transfers heat to the refrigerant in first refrigerant flow channel 11;Since the refrigerant circulates in first refrigerant flow channel 11, it can circulate back and forth to take away the heat generated by battery module 20. At the same time, the refrigerant can also drive turbine structure 30 to rotate in the process of circulating flow, so that turbine structure 30 appropriately disturbs the cooling liquid in box 10, which can increase the heat exchange area of cooling liquid and battery module 20 and the inner wall of box 10, promote the heat distribution in cooling liquid to be more uniform, thereby improving the heat dissipation efficiency. That is, the energy storage battery box 100 only uses a cooling circuit with circulating refrigerant, which reduces one cooling circulation circuit compared with the existing two circulation circuits, thereby simplifying the overall structural complexity of the system, reducing the heat exchange resistance, and reducing the energy consumption. Moreover, turbine structure 30 is driven by flowing refrigerant, without the need for additional power elements to rotate, thereby further reducing energy consumption, simplifying the overall structure of the system, and improving heat dissipation efficiency.

[0064] The energy storage system 1000 includes the energy storage battery box 100, which has all the functions and advantages of the energy storage battery box 100.

[0065] The above merely describes specific embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage battery pack, characterized by, The application relates to a storage battery box (100), which comprises a box body (10) containing cooling liquid, a first refrigerant flow channel (11) provided on the box body (10) and containing circulating refrigerant, a battery module (20) arranged in the box body (10) and immersed in the cooling liquid, and a turbine structure (30) rotatably arranged in the box body (10) and partially located in the first refrigerant flow channel (11) and partially located in the cooling liquid, wherein the refrigerant exchanges heat with the cooling liquid through the inner wall of the box body (10), and the refrigerant drives the turbine structure (30) to rotate relative to the box body (10) during the refrigerant flow in the first refrigerant flow channel (11) to disturb the cooling liquid. The turbine structure (30) comprises a first turbine (31), a rotating shaft (32) and a second turbine (33) connected in sequence, the first turbine (31) is arranged in the first refrigerant flow channel (11), the rotating shaft (32) is rotatably arranged on the inner wall of the box body (10), and the second turbine (33) is arranged in the cooling liquid. The radius of the first turbine (31) is smaller than that of the second turbine (33). The storage battery box (100) further comprises a baffle structure (40) arranged in the box body (10) and forming a battery containing space (50) with the box body (10), and the battery module (20) is arranged in the battery containing space (50). The baffle structure (40) is provided with a plurality of flow-through holes (44), and the cooling liquid flows into the battery containing space (50) through the plurality of flow-through holes (44). The storage battery box (100) further comprises a first liquid inlet joint (61) and a first liquid outlet joint (62), the first liquid inlet joint (61) and the first liquid outlet joint (62) are arranged on opposite sides of the box body (10) respectively and are in communication with the first refrigerant flow channel (11).

2. The energy storage battery pack of claim 1, wherein, The number of the turbine structures (30) is two, and the two turbine structures (30) are arranged on opposite sides of the box body (10) respectively and are arranged correspondingly with the first liquid inlet joint (61) and the first liquid outlet joint (62).

3. The energy storage battery pack of claim 2, wherein, The first refrigerant flow channel (11) comprises a first sub-flow channel (111), a first mounting space (112), a second sub-flow channel (113) and a second mounting space (114) connected in sequence, the first mounting space (112) is in communication with the first liquid inlet joint (61), the second mounting space (114) is in communication with the first liquid outlet joint (62), and a part of the two turbine structures (30) is arranged in the first mounting space (112) and the second mounting space (114) respectively.

4. The energy storage battery pack of claim 1, wherein, ​ ​ 5. The energy storage battery pack of claim 1, wherein, ​ ​ 6. The energy storage battery pack of claim 5, wherein, ​ The height of the end of the first sub-flow passage (111) communicated with the first installation space (112) is different from the height of the end of the second sub-flow passage (113) communicated with the first installation space (112); the height of the end of the first sub-flow passage (111) communicated with the second installation space (114) is different from the height of the end of the second sub-flow passage (113) communicated with the second installation space (114).

7. The energy storage battery pack of claim 5, wherein, The box (10) comprises a bottom plate (12), an inner shell (13) and an outer shell (14), the battery module (20) is arranged on the bottom plate (12) and located in the inner shell (13); the inner shell (13) is arranged on the bottom plate (12) and located in the outer shell (14), a cooling liquid containing space (15) is formed between the inner shell (13) and the bottom plate (12), and the cooling liquid is contained in the cooling liquid containing space (15); the outer shell (14) is arranged on the bottom plate (12) and forms the first refrigerant flow passage (11) with the inner shell (13) and the bottom plate (12); The first liquid inlet connector (61) and the first liquid outlet connector (62) are arranged on opposite sides of the outer shell (14), and the two turbine structures (30) are arranged on opposite sides of the inner shell (13).

8. The energy storage battery pack of claim 7, wherein, The bottom plate (12) is provided with a second refrigerant flow passage (121) containing circulating refrigerant; The energy storage battery box (100) further comprises a second liquid inlet connector (71) and a second liquid outlet connector (72), the two ends of the second liquid inlet connector (71) are communicated with the second refrigerant flow passage (121) and the first liquid inlet connector (61) respectively, and the two ends of the second liquid outlet connector (72) are communicated with the second refrigerant flow passage (121) and the first liquid outlet connector (62) respectively.

9. An energy storage system characterized by, The energy storage system (1000) further comprises an energy storage cabinet (300), the number of the energy storage battery boxes (100) is multiple, the multiple energy storage battery boxes (100) are arranged in the energy storage cabinet (300), and the direct cooling system (200) is communicated with the first refrigerant flow passages (11) of the multiple energy storage battery boxes (100) simultaneously.

10. The energy storage system of claim 9, wherein, The energy storage system (1000) further comprises an energy storage cabinet (300), the number of the energy storage battery boxes (100) is multiple, the multiple energy storage battery boxes (100) are arranged in the energy storage cabinet (300), and the direct cooling system (200) is communicated with the first refrigerant flow passages (11) of the multiple energy storage battery boxes (100) simultaneously.

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