Cooling device and whole package step-by-step utilization energy storage system

Abstract

The utility model discloses a kind of cooling device and whole package gradient utilization energy storage system, be configured in connecting energy storage box, the inside hollow of energy storage box, cooling device includes: at least one battery tray, at least one cooling component and water tank component, battery tray is connected to the inner wall of energy storage box, the surface of battery tray is formed with first cooling groove, cooling component includes first coil pipe, first coil pipe is embedded in first cooling groove along the orientation of first cooling groove, and abuts at battery pack, water tank component includes water tank and at least one first water pump, water tank is connected to energy storage box, and with the end of first coil pipe is communicated, first water pump is respectively communicated with the inside of water tank and the other end of first coil pipe.The utility model can effectively solve the problem that gradient battery energy storage power station lacks cooling system and cannot regulate or control heat during battery discharging or charging process, leading to security risk in gradient battery energy storage power station.

Description

Technical Field

[0001] This utility model relates to the field of energy storage power station technology, specifically to a cooling device and a packaged cascaded energy storage system. Background Technology

[0002] Ternary lithium batteries are commonly used as the core energy storage component in cascaded battery energy storage power stations. The flammable and explosive chemical properties of ternary lithium batteries can easily cause thermal runaway and spontaneous combustion, posing safety risks to ternary lithium cascaded battery energy storage power stations. To address these issues, relevant research has emerged.

[0003] For example, Chinese invention patent with publication number CN112305424A, entitled "A Method and System for Real-Time Alarm of Abnormal Data in a Ternary Lithium-ion Cascaded Energy Storage Power Station," includes acquiring operational data of the battery cascaded energy storage power station, judging battery alarm indicators, performing Boolean logic judgments between various battery alarm indicators, determining whether to alarm based on the Boolean result, judging the indoor temperature of the air-conditioned room in the environment, judging PCS faults, voltage consistency of battery clusters, daily discharge of battery clusters, and judging communication faults. This alarm method and system can monitor the battery safety, environmental temperature safety, communication data faults, and system safety of the power station, and provides rapid alarms.

[0004] Setting up an alarm system can quickly alert the system to battery thermal runaway and spontaneous combustion. However, the lack of a cooling system in cascaded battery energy storage power stations makes it impossible to regulate or control the heat during battery discharge or charging, resulting in safety hazards in cascaded battery energy storage power stations. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a cooling device and a whole-pack cascaded energy storage system to solve the technical problem that the lack of a cooling system in the existing cascaded battery energy storage power station to regulate or control the heat during battery discharge or charging, resulting in safety hazards in the cascaded battery energy storage power station.

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

[0007] In a first aspect, this utility model provides a cooling device configured to connect to an energy storage tank, wherein the energy storage tank is hollow inside and includes:

[0008] At least one battery tray is connected to the inner wall of the energy storage box, and a first cooling groove is formed on the surface of the battery tray;

[0009] At least one cooling component includes a first coil, the first coil being embedded in the first cooling groove along a guide and abutting against the battery pack; and

[0010] A water tank assembly includes a water tank and at least one first water pump. The water tank is connected to the energy storage tank and communicates with one end of the first coil. The first water pump is connected to the interior of the water tank and the other end of the first coil.

[0011] In some embodiments, the first coil has a straight section and a bent section, the bent section being located between two adjacent straight sections and the two adjacent bent sections being arranged in opposite bending directions, and the first coil extending along the length direction of the battery tray.

[0012] In some embodiments, the cooling assembly further includes at least one first connecting hose connected to the energy storage tank, with one end of the first connecting hose connected to the outlet of the first water pump and the other end connected to the interior of the first coil.

[0013] In some embodiments, the interior of the water tank is hollow and at least one heat dissipation mesh is provided on its top. The water tank assembly also includes a cooling fan, which is positioned relative to the liquid inside the water tank and connected to the inner top wall of the water tank.

[0014] In some embodiments, the water tank assembly further includes at least one desiccant box, which is embedded in the heat dissipation mesh and connected to the water tank.

[0015] In some embodiments, the battery tray further forms a second cooling groove, which is spaced apart from and arranged side by side on the surface of the battery tray. The cooling assembly further includes a second coil, which is embedded in the second cooling groove and abuts against the battery pack. The interior of the second coil is connected to the interior of the water tank.

[0016] In some embodiments, the water tank assembly further includes at least one second water pump and at least one second connecting hose. The second water pump is connected to the water tank, and the inlet end of the second water pump is connected to the interior of the water tank. The second connecting hose is connected to the energy storage tank, and one end of the second connecting hose is connected to the outlet end of the second water pump, and the other end is connected to the interior of the second coil.

[0017] In some embodiments, the cooling device further includes at least one temperature detection unit and a control module. The temperature detection unit has a fixed end and a detection end. The fixed end of the temperature detection unit is connected to the battery tray, and the detection end abuts against the battery pack. The control module is connected to the energy storage box and is electrically connected to the temperature detection unit, the second water pump, and the cooling fan.

[0018] In some embodiments, the battery tray is further provided with at least one heat dissipation groove that extends through the battery tray.

[0019] Secondly, this utility model also provides a whole-pack cascade energy storage system, including an energy storage box and a cooling device as described above, wherein the battery tray is connected to the inner wall of the energy storage box.

[0020] Compared with existing technologies, the advantages of the cooling device and the whole-pack cascade energy storage system provided by this utility model include: at least one battery tray is connected inside the energy storage box for placing the energy storage battery pack; the battery tray forms a first cooling groove; a first coil is embedded in the first cooling groove along the guide of the first cooling groove and abuts against the battery pack; and a first water pump is used to connect the cooling circulating liquid in the water tank with the first coil. Compared with existing technologies, by providing a first cooling groove on the battery tray where the battery pack is placed, and using the first water pump to circulate the cooling circulating liquid in the water tank and the first coil, the cooling circulating liquid can cool the surface of the battery pack, effectively preventing battery thermal runaway and battery spontaneous combustion during battery discharge or charging. This solves the technical problem in existing technologies where the lack of a cooling system in cascade battery energy storage power stations to regulate or control the heat during battery discharge or charging leads to safety hazards in cascade battery energy storage power stations. Attached Figure Description

[0021] Figure 1 This is a three-dimensional view of a cooling device connected to an energy storage tank according to an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional view of a battery tray provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram showing the connection between a water tank and a first pump body, a first connecting hose, a first coil, a second pump body, a second connecting hose, and a second coil, according to an embodiment of this utility model.

[0024] Figure 4 This is a cross-sectional view of a water tank assembly provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram showing the electrical connection between the temperature detection unit and the control module, the cooling fan and the second water pump provided in one embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] Energy storage box 100; battery tray 200; first cooling tank 210; second cooling tank 220; heat dissipation tank 230; cooling assembly 300; first coil 310; first connecting hose 320; second coil 330; water tank assembly 400; water tank 410; first water pump 420; cooling fan 430; desiccant box 440; second water pump 450; second connecting hose 460; temperature detection unit 500; control module 600. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] To address the technical problem of safety hazards in cascaded battery energy storage power stations due to the lack of a cooling system to regulate or control heat during battery discharge or charging, this utility model provides a cooling device and a whole-pack cascaded energy storage system. This system utilizes a first cooling tank 210 on the battery tray 200 where the battery pack is placed, and a first water pump 420 to circulate cooling fluid from a water tank 410 and a first coil 310. This cooling fluid effectively cools the surface of the battery pack, preventing thermal runaway and spontaneous combustion during battery discharge or charging.

[0030] Please see Figures 1 to 4 , Figure 1 , Figure 2 This is a schematic diagram of the cooling device and the whole-pack cascade energy storage system in one embodiment of the present invention. The cooling device is disposed in the energy storage box 100. The interior of the energy storage box 100 is hollow. The cooling device includes: at least one battery tray 200, at least one cooling component 300 and a water tank component 400. The battery tray 200 is connected to the inner wall of the energy storage box 100. A first cooling groove 210 is formed on the surface of the battery tray 200. The cooling component 300 includes a first coil 310. The first coil 310 is embedded in the first cooling groove 210 along the guide of the first cooling groove 210 and abuts against the battery pack. The water tank component 400 includes a water tank 410 and at least one first water pump 420. The water tank 410 is connected to the energy storage box 100 and is connected to one end of the first coil 310. The first water pump 420 is connected to the interior of the water tank 410 and the other end of the first coil 310.

[0031] In this device, compared with the prior art, a first cooling tank 210 is provided on the battery tray 200 where the battery pack is placed. The first water pump 420 circulates the cooling fluid in the water tank 410 and the first coil 310, so that the cooling fluid can cool the surface of the battery pack. This can effectively prevent battery thermal runaway and battery spontaneous combustion during battery discharge or charging. It can solve the technical problem in the prior art that the lack of a cooling system in the cascade battery energy storage power station makes it impossible to regulate or control the heat during battery discharge or charging, resulting in safety hazards in the cascade battery energy storage power station.

[0032] Furthermore, the energy storage box 100 in this device has a frame structure, and a sealed structure is formed by welding panels to each surface. Multiple battery trays 200 are spaced apart inside the energy storage box 100 to store multiple ternary lithium battery packs. Each battery tray 200 is detachably connected to the energy storage box 100. Users can reasonably select the spacing between two adjacent battery trays 200 according to the usage scenario and needs. This is a conventional setting known to those skilled in the art, and will not be elaborated further here.

[0033] In this embodiment, as Figure 2 As shown, the first coil has a straight section and a bent section. The bent section is located between two adjacent straight sections, and the bending directions of the two adjacent bent sections are opposite. The first coil extends along the length direction of the battery tray.

[0034] The first cooling groove 210 extends along the length of the battery tray 200 and is serpentine. The serpentine first cooling groove 210 can increase the contact area between the first coil 310 and the surface of the battery pack, thereby improving the heat exchange and cooling effect.

[0035] Furthermore, the first cooling tank 210 is located on the side of the battery tray 200 that contacts the battery pack, which can improve heat exchange efficiency.

[0036] In one embodiment, please refer to Figure 3 The cooling assembly 300 also includes at least one first connecting hose 320, which is connected to the energy storage tank 100. One end of the first connecting hose 320 is connected to the liquid outlet of the first water pump 420, and the other end is connected to the interior of the first coil 310.

[0037] To facilitate the installation and adjustment of the battery tray 200, the first water pump 420 and the outlet end and the first coil 310, as well as the first coil 310 and the interior of the water tank 410, are connected by the first connecting hose 320.

[0038] Furthermore, the first connecting hose 320 here is a common and readily available plastic hose on the market, which is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0039] In one embodiment, please refer to Figure 2 The battery tray 200 also has a second cooling groove 220. The second cooling groove 220 and the first cooling groove 210 are spaced apart from each other and arranged side by side on the surface of the battery tray 200. The cooling assembly 300 also includes a second coil 330. The second coil 330 is embedded in the second cooling groove 220 and connected to the battery tray 200. The interior of the second coil 330 is connected to the interior of the water tank 410.

[0040] To improve heat dissipation and cooling effect, the battery tray 200 is also provided with a second cooling tank 220 that is spaced apart from and arranged in parallel with the first cooling tank 210. The second coil 330 is embedded in the second cooling tank 220 and abuts against the battery pack.

[0041] Furthermore, the second cooling tank 220 and the first cooling tank 210 are arranged parallel to each other and spaced apart.

[0042] In one embodiment, please refer to Figure 4 The interior of the water tank 410 is hollow, and at least one heat dissipation mesh is provided on its top. The water tank assembly 400 also includes a cooling fan 430, which is positioned relative to the liquid inside the water tank 410 and connected to the inner top wall of the water tank 410.

[0043] The heat dissipation device is built into the water tank 410 to dissipate heat and cool the circulating coolant in the water tank 410, thereby effectively improving the cooling effect of the cooling device.

[0044] Furthermore, the cooling fan 430 here is a common and readily available small fan on the market, such as the Yong Sheng ACS-4600A. This is a standard configuration known to those skilled in the art, and will not be elaborated further here.

[0045] In one embodiment, please refer to Figure 4 The water tank assembly 400 also includes at least one desiccant box 440, which is embedded in the heat dissipation mesh and connected to the water tank 410.

[0046] To prevent the coolant circulating in the water tank 410 from draining into the energy storage box 100 through the heat dissipation mesh and affecting the humidity of the battery pack's working environment, a desiccant box 440 is also provided relative to the heat dissipation mesh to filter moisture in the air.

[0047] Furthermore, the desiccant box 440 here is a common and readily available device on the market, and is a conventional setting known to those skilled in the art, so it will not be described in detail here.

[0048] In one embodiment, please refer to Figure 3 , Figure 4 The water tank assembly 400 also includes at least one second water pump 450 and at least one second connecting hose 460. The second water pump 450 is connected to the water tank 410, and the inlet end of the second water pump 450 is connected to the interior of the water tank 410. The second connecting hose 460 is connected to the energy storage tank 100, and one end of the second connecting hose 460 is connected to the outlet end of the second water pump 450, and the other end is connected to the interior of the second coil 330.

[0049] To facilitate the installation and adjustment of the battery tray 200, the first water pump 420 and the outlet end are connected to the first coil 310 via the first connecting hose 320.

[0050] Furthermore, the first connecting hose 320, the first water pump 420, and the second water pump 450 are all common and readily available equipment on the market, and are conventional setups known to those skilled in the art, so they will not be described in detail here.

[0051] In this embodiment, as Figure 5 As shown, the cooling device also includes at least one temperature detection unit 500 and a control module 600. The temperature detection unit 500 has a fixed end and a detection end. The fixed end of the temperature detection unit 500 is connected to the battery tray 200, and the detection end abuts against the battery pack. The control module 600 is connected to the energy storage box 100 and is electrically connected to the temperature detection unit 500, the second water pump 450, and the cooling fan 430.

[0052] The temperature detection unit 500 can monitor the temperature of the battery pack surface in real time. The control module 600 can drive the second water pump 450 to work based on the temperature parameters obtained by the temperature detection unit 500, so that the second coil 330 is also filled with circulating coolant to cool and lower the temperature of the battery pack surface, thereby avoiding battery thermal runaway and battery spontaneous combustion during battery discharge or charging.

[0053] Furthermore, the control module 600 can also control the operation of the cooling fan 430 to accelerate the cooling effect of the circulating coolant.

[0054] The temperature detection unit 500 here is a common and readily available temperature sensor on the market, and the control module 600 is a common and readily available PLC controller on the market. The PLC controller can receive the temperature data transmitted by the temperature sensor and control the operation of the second water pump 450 and the cooling fan 430 respectively according to the changes in the temperature data. The temperature sensor and PLC controller here are conventional settings known to those skilled in the art, and will not be described in detail here.

[0055] In one embodiment, please refer to Figure 2 The battery tray 200 also has at least one heat dissipation groove 230, which extends through the battery tray 200.

[0056] By providing heat dissipation grooves 230 on the surface of the battery tray 200, heat dissipation and cooling effects can be increased.

[0057] Furthermore, there are multiple heat dissipation slots 230, which are spaced apart and distributed on the battery tray 200.

[0058] This embodiment also provides a whole-pack cascade energy storage system, including an energy storage box 100 and a cooling device as described above, with a battery tray 200 connected to the inner wall of the energy storage box 100.

[0059] Specifically, the packaged energy storage system in this device should also include: PCS, EMS station control unit, UPS, fire extinguishing device, main relay, shunt, fast fuse, EMS system station control touch screen, BMS main controller, BMS slave controller, and air conditioner.

[0060] Among them, the PCS (Power Conversion System) is a conversion device between the power grid and the battery, which can charge and discharge the battery; the Energy Management System, also known as EMS, includes an EMS station control unit and an EMS system station control touch screen in this embodiment; the fire extinguishing device adopts a combination of a cabinet-type energy storage non-pressurized fire extinguishing device (including a controller) that integrates control and fire extinguishing and a non-pressurized perfluorohexanone fire extinguishing device to achieve two levels of active and passive protection: package and cabinet; UPS, or uninterruptible power supply, is an uninterruptible power supply containing an energy storage device; the Battery Management System (BMS) is the link between the battery and the user, mainly for secondary batteries, and in this embodiment, the BMS includes a BMS master controller and a BMS slave controller.

[0061] Furthermore, the main relay, shunt, fast-acting fuse, and air conditioner here are all conventional installations known to those skilled in the art, and will not be described in detail here.

[0062] To better understand this utility model, the following is combined with... Figures 1 to 5 The technical solution of this utility model is described in detail below:

[0063] At least one battery tray 200 is connected inside the energy storage box 100 for placing the energy storage battery pack. The battery tray 200 forms a first cooling groove 210. A first coil 310 is embedded in the first cooling groove 210 along the guide and abuts against the battery pack. A first water pump 420 is used to connect the cooling circulating fluid in the water tank 410 with the first coil 310. Compared with the prior art, by providing a first cooling groove 210 on the battery tray 200 where the battery pack is placed, and using the first water pump 420 to circulate the cooling circulating fluid in the water tank 410 and the first coil 310, the cooling circulating fluid can cool the surface of the battery pack, effectively preventing battery thermal runaway and spontaneous combustion during battery discharge or charging.

[0064] In the specific working process of this utility model, when in use, the first water pump 420 works to circulate the circulating coolant in the water tank 410 to the first coil 310. When the circulating coolant flows through the first coil 310, it can carry away the heat on the surface of the battery pack and regulate or control the heat during the battery discharge or charging process.

[0065] Furthermore, when the temperature detection unit 500 detects that the temperature of the battery pack surface exceeds the preset value, the control module 600 controls the cooling fan 430 and the second water pump 450 to work, simultaneously circulating the coolant in the water tank 410 to the second coil 330. When the circulating coolant flows through the second coil 330, it can remove the heat from the surface of the battery pack, effectively cooling and reducing the temperature of the battery pack surface.

[0066] This application, through the aforementioned structure and system, can solve the technical problem in the prior art where the lack of a cooling system in a cascaded battery energy storage power station prevents the regulation or control of heat during battery discharge or charging, leading to potential safety hazards in the cascaded battery energy storage power station.

[0067] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A cooling device disposed in connection with an energy storage tank, the energy storage tank being hollow inside, characterized in that, include: At least one battery tray is connected to the inner wall of the energy storage box, and a first cooling groove is formed on the surface of the battery tray; At least one cooling component includes a first coil, the first coil being embedded in the first cooling groove along a guide and abutting against the battery pack; and A water tank assembly includes a water tank and at least one first water pump. The water tank is connected to the energy storage tank and communicates with one end of the first coil. The first water pump is connected to the interior of the water tank and the other end of the first coil.

2. The cooling device according to claim 1, characterized in that, The first coil has a straight section and a bent section. The bent section is located between two adjacent straight sections, and the bending directions of the two adjacent bent sections are opposite. The first coil extends along the length direction of the battery tray.

3. The cooling device according to claim 1, characterized in that, The cooling assembly further includes at least one first connecting hose, which is connected to the energy storage tank, with one end of the first connecting hose connected to the outlet of the first water pump and the other end connected to the interior of the first coil.

4. The cooling device according to claim 3, characterized in that, The water tank is hollow inside and has at least one heat dissipation mesh on its top. The water tank assembly also includes a cooling fan, which is positioned relative to the liquid inside the water tank and connected to the inner top wall of the water tank.

5. The cooling device according to claim 4, characterized in that, The water tank assembly also includes at least one desiccant box, which is embedded in the heat dissipation mesh and connected to the water tank.

6. The cooling device according to claim 4, characterized in that, The battery tray also forms a second cooling groove, which is spaced apart from and arranged side by side on the surface of the battery tray. The cooling assembly also includes a second coil, which is embedded in the second cooling groove and abuts against the battery pack. The interior of the second coil is connected to the interior of the water tank.

7. The cooling device according to claim 6, characterized in that, The water tank assembly further includes at least one second water pump and at least one second connecting hose. The second water pump is connected to the water tank, and the inlet end of the second water pump is connected to the interior of the water tank. The second connecting hose is connected to the energy storage tank, and one end of the second connecting hose is connected to the outlet end of the second water pump, and the other end is connected to the interior of the second coil.

8. The cooling device according to claim 7, characterized in that, The cooling device further includes at least one temperature detection unit and a control module. The temperature detection unit has a fixed end and a detection end. The fixed end of the temperature detection unit is connected to the battery tray, and the detection end abuts against the battery pack. The control module is connected to the energy storage box and is electrically connected to the temperature detection unit, the second water pump, and the cooling fan.

9. The cooling device according to claim 7, characterized in that, The battery tray also has at least one heat dissipation groove that extends through the battery tray.

10. A packaged, cascaded energy storage system, characterized in that, It includes an energy storage box and a cooling device as described in any one of claims 1-9, wherein the battery tray is connected to the inner wall of the energy storage box.

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