Automatic liquid supplementing device of liquid cooling energy storage system
Through the automatic liquid replenishment device of the liquid-cooled energy storage system, the problem of unstable liquid supply in the liquid-cooled system is solved, and a more stable coolant pressure and a more uniform heat dissipation effect are achieved, extending the system life and reducing the electrical cost.
Patent Information
- Application Number
- CN202420235989.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-31
AI Technical Summary
During operation, the liquid cooling system causes unstable liquid supply due to changes in the internal liquid temperature, which affects the heat dissipation effect and system life.
An automatic liquid replenishment device for liquid-cooled energy storage system is designed, including tank assembly, pipeline assembly and detection assembly. Through the liquid collecting tank, liquid level line, exhaust pipe and liquid level gauge signal line, the pressure of the coolant is ensured. Stable and evenly distributed to prevent liquid leakage and evaporation, and realize the system's self-replenishment and pressure regulation.
It improves the operating stability and heat dissipation effect of the liquid cooling system, extends the life of the energy storage system, and reduces the electrical cost of the entire life cycle.
Smart Images
Figure CN222191097U_ABST
Abstract
Description
Technical Field
[0001] This article belongs to the technical field of automatic refilling of liquid-cooled energy storage, and specifically relates to an automatic refilling device for a liquid-cooled energy storage system. Background Art
[0002] The liquid cooling system is a system that manages heat through the circulation of liquid. The main working principle is that the low-temperature cooling liquid absorbs heat when it flows through the high-temperature object. After absorbing the heat, it flows to the compressor to dissipate heat, thereby lowering the temperature of the coolant and continuing to circulate. The main components of the liquid cooling system are: liquid cooling unit (including compressor, pump unit, flow control, etc.), heat exchanger, circulation pipeline, coolant, etc. At present, the liquid cooling system is widely used in data centers, electric vehicles, battery energy storage systems, etc. due to its efficient cooling effect.
[0003] For example, in a battery energy storage system, the battery will generate a lot of heat when charging or discharging due to its own internal resistance, causing the battery temperature to rise. If the heat is not properly dissipated, the system life will be accelerated, and even safety problems may occur. At present, large-scale energy storage systems are tens or hundreds of MWh, requiring a large number of batteries to be stacked together, which generates a lot of heat during operation. The traditional air cooling system is inefficient, and liquid cooling systems are currently used for heat dissipation.
[0004] Products that use a liquid cooling system have higher requirements for the system, which must meet requirements such as stable pressure, uniform heat dissipation, and no leakage. However, during operation, the actual liquid cooling system may experience repeated changes in system operating pressure and liquid level due to changes in internal liquid temperature, resulting in unstable internal liquid supply, uneven heat dissipation at the end of the cooling system, and large temperature differences in the battery. These problems will affect the heat dissipation effect of the entire product and affect product performance and life.
[0005] In summary, how to effectively solve the problem of unstable supply and return fluid pressure in a battery cooling system is a problem that those skilled in the art urgently need to solve. Utility Model Content
[0006] In order to solve the above problems, this paper proposes an automatic liquid replenishing device for a liquid-cooled energy storage system, the automatic liquid replenishing device includes a tank assembly, a pipeline assembly and a detection assembly, the tank assembly includes a liquid collecting tank, an upper liquid level line and a lower liquid level line, the top and bottom of the liquid collecting tank are provided with pipeline assemblies, the outer surface of the liquid collecting tank is provided with an upper liquid level line and a lower liquid level line in parallel up and down, a detection assembly is provided between the upper liquid level line and the lower liquid level line on the inner side of the liquid collecting tank, the detection assembly includes a liquid level gauge signal line and a liquid level gauge, the upper end of the liquid level gauge is provided above the upper liquid level line, the lower end of the liquid level gauge is provided below the lower liquid level line, the liquid level gauge signal line passes through the top surface of the liquid collecting tank, and the liquid collecting tank is connected to the liquid collecting tank through the pipeline assembly. The component is connected to the circulation pipeline of the liquid-cooled energy storage system, the pipeline assembly includes an exhaust pipe, a connecting pipeline and a pipeline valve, the exhaust pipe is arranged on the top surface of the liquid collecting tank body, a pressure valve is arranged on the inner side of the exhaust pipe, the connecting pipeline is arranged on the bottom surface of the liquid collecting tank body, a pipeline valve is arranged in the middle of the connecting pipeline, the connecting pipeline is communicated with the liquid-cooled energy storage system, and is connected to the entire energy storage liquid cooling circulation system through a simple device, which solves the problems of coolant pipeline pressure change, slow evaporation of coolant, leakage loss, maintenance and draining of the liquid cooling system, making the entire liquid cooling system run more stably, providing better heat dissipation effect and temperature uniformity for the energy storage system, improving the life of the entire energy storage system, and reducing the cost of electricity throughout the life cycle.
[0007] The liquid collecting tank body is a cavity type sealed tank body, the material of the liquid collecting tank body is corrosion-resistant material, the top surface of the liquid collecting tank body is provided with a sealing cover, the top surface of the sealing cover is provided with an exhaust pipe and a sealed wiring hole, the tank body material includes but is not limited to stainless steel, aluminum, glass, rubber, resin, plastic and other materials, but all must meet the requirements of durability and can store coolant for a long time without causing corrosion.
[0008] The upper and lower liquid level lines are both located on the outer surface of the liquid collecting tank and can be marked on the outside of the tank for easy viewing.
[0009] The connecting pipe is a universal connecting pipe, and the material of the connecting pipe is a corrosion-resistant material. The connecting pipe is the pipe connecting the device to the circulating coolant system, and a three-way pipe fitting can be added according to time requirements. The connecting pipe material includes but is not limited to stainless steel, aluminum, glass, rubber, resin, plastic and other materials, but they must meet the requirements of durability and can store coolant for a long time without causing corrosion.
[0010] The exhaust pipe is a straight exhaust pipe. The exhaust pipe is made of corrosion-resistant material and has a built-in pressure valve. When the gas pressure reaches a certain threshold, it opens to exhaust or inhale to keep the pressure inside and outside the tank balanced. The exhaust pipe material includes but is not limited to stainless steel, aluminum, glass, rubber, resin, plastic and other materials, but they must meet the requirements of durability and can store coolant for a long time without causing corrosion.
[0011] The ends of the level gauge signal line are dry contacts and two-way connectors of RS485, which are used to detect the height of the coolant level, including but not limited to capacitance, ultrasonic, weight, magnetic float, glass tube, etc., but all must meet the requirements of detection sensitivity and durability. The level gauge signal can be connected to the liquid cooling unit and the control unit through dry contacts, RS485, etc. When the coolant level in the tank exceeds the highest or falls below the lowest level line, the signal is fed back to the liquid cooling unit in time, and the liquid cooling unit acts according to the set program to ensure the normal operation of the system.
[0012] Beneficial effects:
[0013] Through a simple device connected to the entire energy storage liquid cooling circulation system, it solves the problems of coolant pipeline pressure changes, slow evaporation of coolant, leakage loss, maintenance and draining in the liquid cooling system, making the entire liquid cooling system run more stably, providing the energy storage system with better heat dissipation effect and temperature uniformity, thereby increasing the life of the entire energy storage system and reducing the cost of electricity over the entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is an internal perspective view of an automatic liquid replenishing device for a liquid-cooled energy storage system;
[0015] In the figure; 11, exhaust pipe, 12, upper liquid level line, 13, liquid collecting tank, 14, lower liquid level line, 15, connecting pipeline, 16, pipeline valve, 21, liquid level meter signal line, 22, liquid level meter. DETAILED DESCRIPTION
[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
[0017] Exhaust pipe 11, upper liquid level line 12, liquid collecting tank 13, lower liquid level line 14, connecting pipeline 15, pipeline valve 16, liquid level meter signal line 21, liquid level meter 22.
[0018] like Figure 1 As shown;
[0019] An automatic liquid replenishing device for a liquid-cooled energy storage system, the automatic liquid replenishing device comprising a tank assembly, a pipeline assembly and a detection assembly, the tank assembly comprising a liquid collecting tank body 13, an upper liquid level line 12 and a lower liquid level line 14, the top and bottom of the liquid collecting tank body 13 are provided with pipeline assemblies, the outer surface of the liquid collecting tank body 13 is provided with an upper liquid level line 12 and a lower liquid level line 14 in parallel from top to bottom, a detection assembly is provided between the upper liquid level line 12 and the lower liquid level line 14 on the inner side of the liquid collecting tank body 13, the detection assembly comprises a liquid level gauge signal line 21 and a liquid level gauge 22, the upper end of the liquid level gauge 22 is provided above the upper liquid level line 12, the lower end of the liquid level gauge 22 is provided below the lower liquid level line 14, the liquid level gauge signal line 21 passes through the top surface of the liquid collecting tank body 13, the liquid collecting tank body is connected to the circulation pipeline of the liquid-cooled energy storage system through the pipeline assembly, and the pipeline assembly comprises an exhaust pipe 11. Connecting pipeline 15 and pipeline valve 16. The exhaust pipe 11 is arranged on the top surface of the liquid collecting tank body 13. A pressure valve is arranged on the inner side of the exhaust pipe 11. The connecting pipeline 15 is arranged on the bottom surface of the liquid collecting tank body 13. A pipeline valve 16 is arranged in the middle of the connecting pipeline. The connecting pipeline 15 is communicated with the liquid-cooled energy storage system. The liquid collecting tank body 13 is a cavity sealed tank body. The material of the liquid collecting tank body 13 is corrosion-resistant material. A sealing cover is arranged on the top surface of the liquid collecting tank body 13. The top surface of the sealing cover is provided with an exhaust pipe 11 and a sealed wiring hole. The upper liquid level line 12 and the lower liquid level line 14 are both arranged on the outer surface of the liquid collecting tank body. The connecting pipeline 15 is a universal connecting pipe. The material of the connecting pipeline 15 is corrosion-resistant material. The exhaust pipe 11 is a straight-through exhaust pipe 11. The material of the exhaust pipe 11 is corrosion-resistant material. The end of the liquid level meter signal line 21 is a dry contact and a two-way connector of RS485.
[0020] Implementation examples;
[0021] When working, the whole device is connected to the liquid cooling pipeline of the liquid cooling unit through the connecting pipe 15, and the cooling liquid is built in. It is connected to the cooling and heat dissipation system as a whole and participates in the whole heat dissipation cycle. Due to thermal expansion and contraction, when the coolant absorbs heat, the volume of the coolant expands, the pipeline pressure increases, and after the pressure is transmitted to this device, the tank body has a large expandable volume, and the coolant can expand without pressure to reduce the pressure of the pipeline and the compressor of the liquid cooling unit; when the coolant passes through the compressor, the temperature decreases, the volume of the coolant shrinks, and the coolant in the tank body can replenish the coolant in the pipeline in time to ensure the flow rate. The canned volume of the coolant is based on the heat capacity and expansion coefficient of the selected coolant, considering the highest and lowest temperatures of the application scenario, and the maximum and minimum volumes can be calculated using the PV=nRT formula. The maximum and minimum volumes are marked on the tank body, and the tank body has a built-in liquid level sensor, which is consistent with the maximum and minimum volume scales, and a signal line is fed back to the liquid cooling unit. When running, after the maximum or minimum liquid level line is triggered, an alarm signal is issued to enhance subsequent actions, such as reducing the operating flow, human intervention, and stopping operation. The tank exhaust pipe 1111 is equipped with a pressure valve, which opens to exhaust or inhale when the gas pressure reaches a certain threshold to keep the pressure inside and outside the tank balanced.
[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An automatic liquid replenishing device for a liquid-cooled energy storage system, the automatic liquid replenishing device comprising a tank assembly, a pipeline assembly and a detection assembly, the tank assembly comprising a liquid collecting tank, an upper liquid level line and a lower liquid level line, the top and bottom of the liquid collecting tank are both provided with pipeline assemblies, and the outer surface of the liquid collecting tank is provided with an upper liquid level line and a lower liquid level line in parallel from top to bottom, characterized in that: A detection assembly is provided between the upper liquid level line and the lower liquid level line on the inner side of the liquid collecting tank body, and the detection assembly includes a liquid level gauge signal line and a liquid level gauge. The upper end of the liquid level gauge is provided above the upper liquid level line, and the lower end of the liquid level gauge is provided below the lower liquid level line. The liquid level gauge signal line passes through the top surface of the liquid collecting tank body, and the liquid collecting tank body is connected to the circulation pipeline of the liquid-cooled energy storage system through a pipeline assembly. The pipeline assembly includes an exhaust pipe, a connecting pipeline and a pipeline valve. The exhaust pipe is provided on the top surface of the liquid collecting tank body, and a pressure valve is provided on the inner side of the exhaust pipe. The connecting pipeline is provided on the bottom surface of the liquid collecting tank body, and a pipeline valve is provided in the middle of the connecting pipeline, and the connecting pipeline is communicated with the liquid-cooled energy storage system.
2. The automatic liquid replenishing device for a liquid-cooled energy storage system according to claim 1, characterized in that: The liquid collecting tank body is a cavity-type sealed tank body, the material of the liquid collecting tank body is corrosion-resistant material, a sealing cover is arranged on the top surface of the liquid collecting tank body, and an exhaust pipe and a sealed wiring hole are arranged on the top surface of the sealing cover.
3. The automatic liquid replenishing device for a liquid-cooled energy storage system according to claim 1, characterized in that: The upper liquid level line and the lower liquid level line are both arranged on the outer surface of the liquid collecting tank body.
4. The automatic liquid replenishing device for a liquid-cooled energy storage system according to claim 1, characterized in that: The connecting pipe is a universal connecting pipe, and the material of the connecting pipe is a corrosion-resistant material.
5. The automatic liquid replenishing device for a liquid-cooled energy storage system according to claim 1, characterized in that: The exhaust pipe is a straight exhaust pipe, and the material of the exhaust pipe is corrosion-resistant material.
6. The automatic liquid replenishing device for a liquid-cooled energy storage system according to claim 1, characterized in that: The ends of the liquid level meter signal line are dry contacts and RS485 two-way connectors.