Lithium battery cascade utilization energy storage device

Abstract

The application provides a lithium battery step utilization energy storage device, and relates to the field of energy storage equipment.The lithium battery step utilization energy storage device comprises a base, a lithium battery cabinet arranged on the base, and a solar panel arranged above the lithium battery cabinet, and further comprises a rainwater collecting and heat dissipation system.The rainwater collecting and heat dissipation system comprises a rainwater collecting tank, a water-cooling heat dissipation assembly, and a driving assembly.The rainwater collecting tank is arranged below the solar panel, the top of the rainwater collecting tank is connected with the solar panel to collect rainwater, and the rainwater collecting tank is rotatably arranged.The water-cooling heat dissipation assembly is arranged on the lithium battery cabinet.When the temperature of the lithium battery abnormally rises, the system can automatically start within tens of seconds, and the stored rainwater is rapidly poured into the heat dissipation assembly, the water has a large heat capacity, and the heat dissipation assembly can effectively and rapidly absorb heat, so that the temperature rise of the lithium battery is effectively and rapidly inhibited, the chain reaction of thermal runaway is broken, and valuable time is gained for fault treatment.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, specifically to a lithium battery cascade utilization energy storage device. Background Technology

[0002] Retired lithium batteries, after being screened and recombined, can be used for energy storage in new energy systems such as photovoltaics and wind power, representing an important direction for resource recycling. These energy storage devices are often deployed outdoors, facing complex environmental challenges. Lithium batteries themselves generate heat during charging and discharging, making thermal safety management a core challenge. The problem is particularly acute in two dangerous situations: first, in sustained hot weather, extremely high ambient temperatures exacerbate the battery's heat dissipation burden; second, and more dangerously, potential faults such as internal short circuits or overcharging can cause the battery temperature to rise rapidly and abnormally in a short period, entering a state of impending thermal runaway.

[0003] The mainstream heat dissipation solutions for existing outdoor energy storage cabinets are forced air cooling or air conditioning. Forced air cooling has a sharp drop in heat dissipation efficiency when the ambient temperature is close to or exceeds the battery's operating limit, and it cannot cope with extreme high temperatures. Although air conditioning can maintain the temperature, it consumes a lot of energy, and in emergency situations where the battery temperature suddenly soars due to a malfunction, its cooling power and cooling speed may not be sufficient to suppress the rapid temperature rise, posing risks of response delay and insufficient heat dissipation capacity. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a lithium battery cascade utilization energy storage device that can store natural rainwater under normal conditions. When an abnormal battery temperature is detected, it automatically starts and uses the stored rainwater to perform efficient and rapid flushing-type water cooling on the battery cabinet, thereby quickly suppressing temperature rise and preventing thermal runaway in dangerous situations, greatly improving the safety level of the system.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery cascade utilization energy storage device, comprising a base, a lithium battery cabinet mounted on the base, and a solar panel mounted above the lithium battery cabinet, and further comprising a rainwater collection and heat dissipation system; the rainwater collection and heat dissipation system comprises a rainwater collection tank, a water-cooled heat dissipation component, and a drive component; the rainwater collection tank is located below the solar panel, its top is connected to the solar panel to collect rainwater, and the rainwater collection tank is rotatably mounted; the water-cooled heat dissipation component is mounted on the lithium battery cabinet; the drive component is kinetically connected to the rainwater collection tank for driving its rotation; the rainwater collection tank is configured to have at least one drainage position, and when it rotates to the drainage position, the rainwater stored inside can be discharged and flow through the water-cooled heat dissipation component.

[0008] Furthermore, the solar panel is tilted and fixedly connected to the top of the rainwater collection box, and an inlet is provided at the lower end of the solar panel. An automatic sealing mechanism is provided at the inlet of the rainwater collection box. The automatic sealing mechanism includes a buoyancy component and a guide component. The buoyancy component is connected to the rainwater collection box through the guide component and is configured to move upward to seal the inlet in response to the rise of the water level in the box.

[0009] Furthermore, the water-cooled heat dissipation component includes a heat dissipation box and heat dissipation fins disposed therein; the heat dissipation box is disposed on the heat dissipation surface of the lithium battery cabinet; the top of the heat dissipation box is provided with a water inlet and the bottom is provided with a water outlet.

[0010] Furthermore, it also includes a deflector plate; the deflector plate is inclinedly disposed on the drainage path of the rainwater collection box, and is used to guide the discharged rainwater to the water-cooled heat dissipation component.

[0011] Furthermore, the bottom of the rainwater collection box is provided with a drain outlet; the guide plate is provided with a top rod, and the drain outlet is provided with a resiliently openable and closable seal. When the rainwater collection box is rotated to the drain position, the top rod acts on the seal to open it.

[0012] Furthermore, the heat sinks are arranged in an alternating pattern within the heat sink housing.

[0013] Furthermore, the drive assembly includes a drive motor, a reducer, and a side plate; the rainwater collection tank is rotatably connected to the side plate via a rotating shaft; the reducer is mounted on the side plate, with its input end connected to the drive motor and its output end connected to the rotating shaft of the rainwater collection tank.

[0014] Furthermore, it also includes a control system; the control system includes multiple temperature sensors and a controller; the lithium battery cabinet has multiple independent battery compartments, each of which is equipped with a temperature sensor; the controller is electrically connected to all the temperature sensors and the drive assembly respectively; the controller is configured to control the drive assembly to operate according to the signals from the temperature sensors.

[0015] Furthermore, the solar panel is fixed to the top of the rainwater collection tank and is set at an angle to the horizontal plane.

[0016] Furthermore, the drainage location is configured such that the angle between the rainwater collection tank and the horizontal plane is greater than 45 degrees, and the tilt angle of the guide plate is configured to be between 45 degrees and 75 degrees.

[0017] (III) Beneficial Effects

[0018] This invention provides a lithium battery cascade utilization energy storage device. It has the following beneficial effects:

[0019] 1. This lithium battery cascade energy storage device can automatically start within tens of seconds when the battery temperature is detected to rise abnormally. It pours a large amount of stored rainwater onto the heat dissipation components in a fast and efficient manner. By utilizing the huge heat capacity of water, it can effectively and quickly suppress the battery temperature rise, interrupt the thermal runaway chain reaction, and buy valuable time for fault handling.

[0020] 2. This lithium battery cascade energy storage device can easily adjust the angle of the solar panel through the setting of the drive component, thereby ensuring the efficiency of the solar panel. In addition, the setting of the automatic sealing mechanism of the water inlet ensures that rainwater will not flow out from the water inlet when the collection box is rotating to drain water and adjusting the angle of the solar panel.

[0021] 3. This lithium battery cascade energy storage device accelerates rainwater through the inclined guide plate and rushes into the heat dissipation box covered with staggered heat dissipation fins, which greatly increases the contact area and turbulence between water and heat dissipation fins, allowing a limited amount of water to carry away more heat. The heat dissipation efficiency is much higher than that of air cooling and conventional liquid cooling cycles. It can transfer a large amount of heat energy in a short time and has a good emergency effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the lithium battery cabinet structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the water-cooled heat dissipation component structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the rainwater collection box structure of the present invention.Figure 1 ;

[0026] Figure 5 This is a schematic diagram of the rainwater collection box structure of the present invention. Figure 2 ;

[0027] Figure 6 This is a cross-sectional view of the rainwater collection box structure of the present invention. Figure 1 ;

[0028] Figure 7 This is a cross-sectional view of the rainwater collection box structure of the present invention. Figure 2 .

[0029] In the diagram: 1. Base; 2. Lithium battery cabinet; 3. Side panel; 4. Solar panel; 5. Reducer; 6. Rainwater collection tank; 7. Guide plate; 8. Top rod; 9. Heat sink; 10. Heat sink; 11. Water inlet; 12. Drain outlet; 13. Seal; 14. Guide; 15. Buoyancy component; 16. Drive motor. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] This invention provides a lithium battery cascade utilization energy storage device, such as... Figures 1 to 7 As shown, it includes a base 1, a lithium battery cabinet 2, a solar panel 4, and a core rainwater collection and heat dissipation system.

[0032] The base 1 serves as the support platform for the entire device. The lithium battery cabinet 2 is fixedly mounted on the base 1 and contains multiple independent battery compartments for installing lithium battery modules for reuse. Each battery compartment is equipped with a temperature sensor to enable independent real-time monitoring of the thermal state of each battery cell.

[0033] The rainwater collection and heat dissipation system is the core component for coping with dangerously high temperatures. It consists of a rotatable water collection unit, a high-efficiency heat dissipation unit, a drive unit, and an intelligent control unit.

[0034] The water collection unit includes a solar panel 4 and a rainwater collection tank 6. Two side panels 3 are vertically fixed to the base 1, located on both sides of the lithium battery cabinet 2. The rainwater collection tank 6 is rotatably supported between the two side panels 3 via pivots on both sides. The solar panel 4 is obliquely fixed to the top of the rainwater collection tank 6, with its lower edge connecting to the open top of the rainwater collection tank 6. During rainfall, rainwater flows along the surface of the solar panel 4 and enters the rainwater collection tank 6 for storage through the inlet 11. The solar panel 4 also powers the lithium battery pack in the device, ensuring the emergency system's energy self-sufficiency. This allows the solar panel to perform both power generation and water collection functions.

[0035] A water level sensor is also installed inside the rainwater collection tank 6, and the water level sensor is electrically connected to the controller. The water level sensor is used to monitor the water storage status in the tank in real time or periodically and feed the signal back to the controller. The controller is configured to: when it receives an over-temperature alarm signal from the temperature sensor, first check the status of the water level sensor; only when it is confirmed that there is sufficient cooling water stored in the rainwater collection tank (6) will it issue a command to the drive assembly to rotate and drain water; if it detects that there is no water or insufficient water in the tank, the controller can trigger a water shortage alarm and take other backup heat dissipation or protection strategies.

[0036] An automatic sealing mechanism is provided at the water inlet 11. This mechanism includes two vertically fixed guide members 14 inside the collection tank. The guide members 14 are configured as vertically arranged guide rods and sliders, and a buoyancy member 15, which is a long strip of foam. The two ends of the buoyancy member 15 are slidably connected to the guide members 14 via sliders. When the water level in the collection tank 6 rises, the buoyancy member 15 floats upward along the guide members 14 under the action of buoyancy until it tightly seals the water inlet 11, preventing water from overflowing and ensuring that water will not spill out from here during subsequent rotation.

[0037] The drive unit is used to quickly drive the collection box 6 to rotate after receiving an instruction. It includes a drive motor 16, a reducer 5, and the side plate 3. The reducer 5 is mounted on the side plate 3, the drive motor 16 is connected to the input end of the reducer 5, and the output end of the reducer 5 is connected to the rotating shaft of the rainwater collection box 6.

[0038] This makes the rainwater collection box 6 both a water storage container and its rotation also controls drainage and the angle adjustment of the solar panels.

[0039] The heat dissipation unit includes a guide plate 7 and a water-cooled heat dissipation assembly. The water-cooled heat dissipation assembly consists of a heat dissipation box 9 installed on the main heat dissipation surface of the lithium battery cabinet 2 and a large number of staggered heat dissipation fins 10 therein. The heat dissipation fins 10 are in close thermal contact with the cabinet body. The heat dissipation box 9 has openings at the top and bottom. A guide plate 7 is fixed to the top of the lithium battery cabinet 2 at an angle of 45-75 degrees, and the drainage position is greater than 45 degrees to ensure that the solar panel 4 will not trigger drainage during angle adjustment. Its high end is located below the rotation trajectory of the rainwater collection box 6, and its low end is directly opposite the top opening of the heat dissipation box 9. A top rod 8 extends upward from the high end of the guide plate 7. At the bottom of the rainwater collection box 6, there is a drain outlet 12, the inner side of which is covered with a resiliently openable and closable sealing element 13. The sealing element 13 is a resilient plastic sheet, and a sealing ring is fixedly connected to the bottom of the resilient plastic sheet, which is normally sealed and closed.

[0040] The control unit includes a controller and temperature sensors for each battery compartment. The controller is electrically connected to all temperature sensors and drive motor 16, and has preset temperature danger thresholds.

[0041] Working principle:

[0042] Routine rainwater harvesting and energy storage: The device is in Figure 1 As shown in the normal state. Rainwater collection tank 6 remains horizontal to collect rainwater, solar panel 4 generates electricity, and the controller continuously monitors the temperature of each battery.

[0043] Hazard signal recognition: In extreme hot weather, or when a battery cell begins to overheat abnormally due to a potential malfunction, the temperature sensor in its compartment is the first to detect a rapid temperature rise. Once any sensor detects a temperature exceeding a preset danger threshold, the controller immediately determines it to be a hazardous condition.

[0044] Emergency Start-up and Drainage: The controller instantly sends a command to the drive motor 16. The drive motor 16 drives the rainwater collection tank 6 to rotate rapidly toward the heat dissipation side via the reducer 5. When the collection tank 6 rotates to the drainage position where its angle with the horizontal plane is greater than 45 degrees, the push rod 8 fixed on the guide plate 7 precisely inserts into and pushes open the seal 13 inside the drain outlet 12. The stored rainwater immediately flows out from the drain outlet 12 under the action of gravity.

[0045] Powerful flushing cooling: The cascading rainwater falls onto the high-angle guide plate 7, gaining acceleration before rushing into the top of the heat sink 9 with significant kinetic energy and flow. The water flow is violently agitated and dispersed among the staggered heat sink fins 10, resulting in a large contact area and thorough heat exchange. The heat sink fins 10 rapidly transfer the accumulated heat from the lithium battery cabinet 2 to the water flow. This process can remove a significant amount of heat in a short time, quickly reducing the temperature of the battery body and its surrounding environment, effectively preventing further temperature spikes.

[0046] Cycle and Reset: After one drainage cycle, the controller can reset the collection tank 6 to the collection position and close the seal 13. If the temperature has not yet dropped to a safe range and there is still water in the collection tank, the system can prepare for the next cooling cycle. The device remains in monitoring mode until all battery temperatures return to a safe range.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cascade utilization energy storage device, comprising a base (1), a lithium battery cabinet (2) disposed on the base (1), and a solar panel (4) disposed above the lithium battery cabinet (2), characterized in that: It also includes a rainwater collection and heat dissipation system; the rainwater collection and heat dissipation system includes a rainwater collection box (6), a water-cooled heat dissipation component and a drive component; the rainwater collection box (6) is located below the solar panel (4), and its top is connected to the solar panel (4) to collect rainwater, and the rainwater collection box (6) is rotatably arranged, the water-cooled heat dissipation component is located on the lithium battery cabinet (2), and the drive component is connected to the rainwater collection box (6) for driving its rotation; the rainwater collection box (6) is configured to have at least one drainage position, and when it rotates to the drainage position, the rainwater stored inside can be discharged and flow through the water-cooled heat dissipation component.

2. The lithium battery cascade utilization energy storage device according to claim 1, characterized in that: The solar panel (4) is fixedly connected to the top of the rainwater collection box (6) at an angle, and an inlet (11) is provided at the lower end of the solar panel (4). An automatic sealing mechanism is provided at the inlet (11) of the rainwater collection box (6). The automatic sealing mechanism includes a buoyancy component (15) and a guide component (14). The buoyancy component (15) is connected to the rainwater collection box (6) through the guide component (14) and is configured to move upward to seal the inlet (11) in response to the rise of the water level in the box.

3. The lithium battery cascade utilization energy storage device according to claim 1, characterized in that: The water-cooled heat dissipation assembly includes a heat dissipation box (9) and heat dissipation fins (10) disposed therein; the heat dissipation box (9) is disposed on the heat dissipation surface of the lithium battery cabinet (2); the top of the heat dissipation box (9) is provided with a water inlet and the bottom is provided with a water outlet.

4. The lithium battery cascade utilization energy storage device according to claim 1, characterized in that: It also includes a guide plate (7); the guide plate (7) is inclined on the drainage path of the rainwater collection box (6) and is used to guide the discharged rainwater to the water-cooled heat dissipation component.

5. A lithium battery cascade utilization energy storage device according to claim 4, characterized in that: The bottom of the rainwater collection box (6) is provided with a drain outlet (12); the guide plate (7) is provided with a top rod (8), and the drain outlet (12) is provided with a seal (13) that can be opened and closed elastically. When the rainwater collection box (6) is rotated to the drain position, the top rod (8) acts on the seal (13) to open it.

6. A lithium battery cascade utilization energy storage device according to claim 3, characterized in that: The heat sinks (10) are arranged alternately inside the heat sink box (9).

7. A lithium battery cascade utilization energy storage device according to claim 1, characterized in that: The drive assembly includes a drive motor (16), a reducer (5), and a side plate (3); the rainwater collection tank (6) is rotatably connected to the side plate (3) via a rotating shaft; the reducer (5) is mounted on the side plate (3), its input end is connected to the drive motor (16), and its output end is driven connected to the rotating shaft of the rainwater collection tank (6).

8. A lithium battery cascade utilization energy storage device according to claim 1, characterized in that: It also includes a control system; the control system includes multiple temperature sensors and a controller; the lithium battery cabinet (2) is provided with multiple independent battery compartments, and each battery compartment is provided with the temperature sensor; the controller is electrically connected to all the temperature sensors and the drive assembly respectively; the controller is configured to control the drive assembly to operate according to the signal of the temperature sensor.

9. A lithium battery cascade utilization energy storage device according to claim 1, characterized in that: The solar panel (4) is fixed to the top of the rainwater collection box (6) and is set at an angle to the horizontal plane.

10. A lithium battery cascade utilization energy storage device according to claim 4, characterized in that: The drainage location is configured such that the angle between the rainwater collection box (6) and the horizontal plane is greater than 45 degrees, and the tilt angle of the guide plate (7) is configured to be between 45 degrees and 75 degrees.

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