A battery energy storage and battery energy storage plant
By combining heat pipes, phase change layers, and liquid cooling systems in the battery energy storage device, the problem of poor heat dissipation in the battery energy storage device is solved, achieving efficient thermal management and extended battery life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINYANG VOCATIONAL & TECHN COLLEGE
- Filing Date
- 2025-04-09
- Publication Date
- 2026-06-26
Smart Images
Figure CN224417813U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery energy storage device and a battery energy storage power station. Background Technology
[0002] Currently, energy storage power supplies consist of a casing, a battery pack, and a circuit assembly electrically connected to the battery pack. The circuit assembly mainly includes an inverter and a circuit board. The battery pack is primarily a module assembled from multiple individual battery cells. The battery pack and circuit assembly are all housed within the casing, which provides dustproof and waterproof protection, offering good protection. The battery pack is secured using cable ties, and then outputs power through its two ends, providing positive and negative electrodes respectively.
[0003] Chinese patent application number CN202321598298.1 discloses a battery energy storage device and a battery energy storage power station. The battery energy storage device includes a lithium battery module and a lithium battery pack protection structure. The lithium battery pack protection structure includes a lithium battery pack mounting bracket and lithium battery electrode plates. The lithium battery pack mounting bracket includes a detachably connected upper and lower lithium battery mounting bracket. The lithium battery electrode plates include a positive electrode plate, a negative electrode plate, and multiple series-connected lithium battery plates. Each series-connected lithium battery plate connects to the positive and negative electrodes of at least two lithium batteries. The positive and negative electrode plates are mounted on either the upper or lower lithium battery mounting bracket. The upper and lower lithium battery mounting brackets are located at the upper and lower ends of the lithium battery module to directly fix the lithium battery module, improving the installation and connection strength of each lithium battery. The positive and negative electrode plates are located on the same side of the lithium battery pack mounting bracket, reducing the space occupied by the battery energy storage device and effectively reducing the overall weight of the battery energy storage power station.
[0004] The aforementioned technologies have the following drawbacks: Battery storage devices generate significant heat during operation. The lithium-ion battery modules within these devices are densely assembled from multiple lithium-ion batteries. Current heat dissipation solutions typically involve using cooling fans to drive external airflow into the battery storage device for heat exchange. However, this method is ineffective and easily leads to heat accumulation inside the lithium-ion battery modules. When the lithium-ion battery temperature becomes too high, a series of side reactions occur inside the battery, such as the decomposition of the solid electrolyte interphase (SEI) film, which greatly affects the battery's lifespan. Utility Model Content
[0005] In order to improve the problem that traditional battery energy storage devices have poor heat dissipation and are prone to heat accumulation inside, which affects their cycle life, this application provides a battery energy storage device and a battery energy storage power station.
[0006] The first aspect of this application provides a battery energy storage device using the following technical solution:
[0007] A battery energy storage device includes a lithium battery module and a lithium battery protection structure. A heat dissipation pipe is provided between adjacent lithium batteries in the lithium battery module. A heat dissipation plate is provided at the lower end of the lithium battery protection structure. A heat dissipation cavity is formed in the heat dissipation plate. The upper end of the heat dissipation pipe is closed and the lower end extends out of the lithium battery protection structure and communicates with the heat dissipation cavity of the heat dissipation plate. A phase change layer is filled in the heat dissipation cavity of the heat dissipation plate.
[0008] The lower end of the heat sink is provided with a liquid cooling tank filled with coolant, and the lower end of the heat sink extends into the coolant in the liquid cooling tank.
[0009] Furthermore, a telescopic sleeve is provided on the upper surface of the heat sink plate, the upper end of the telescopic sleeve being closed and the lower end communicating with the heat dissipation cavity of the heat sink plate.
[0010] Furthermore, a stirring motor is provided on one side of the liquid cooling box corresponding to the telescopic sleeve. The output end of the stirring motor extends into the liquid cooling box and is parallel to the heat dissipation plate. A stirring paddle is coaxially fixed to the output end of the stirring motor.
[0011] Furthermore, the heat sink is provided with a mounting bracket near the telescopic sleeve, and a control switch for controlling the start and stop of the stirring motor is provided on the side of the mounting bracket facing the telescopic sleeve; the distance between the control surface of the control switch and the telescopic sleeve is less than the displacement amount that would occur when the temperature of the lithium battery module exceeds a set temperature, causing the phase change layer to expand and the free end of the telescopic sleeve to move closer to the control surface of the control switch.
[0012] Furthermore, a thermally conductive silicone grease layer is coated at the intersection of the heat dissipation pipe and the lithium battery module.
[0013] Furthermore, the telescopic sleeve can be detachably installed on the heat sink.
[0014] Furthermore, the telescopic sleeve has a threaded sleeve fixedly connected to its open end, and the heat sink has a threaded hole, with the threaded sleeve threadedly matched to the threaded hole.
[0015] Furthermore, a sealing gasket is provided at the connection between the telescopic sleeve and the heat sink.
[0016] Furthermore, a support plate is fixed to the periphery of the heat sink, and the heat sink is inserted into the liquid cooling box.
[0017] The second aspect of this application provides a battery energy storage power station using the following technical solution:
[0018] A battery energy storage power station includes the aforementioned battery energy storage device.
[0019] In summary, the beneficial technical effects of this application are as follows:
[0020] When the battery energy storage device generates significant heat during operation, multiple heat dissipation pipes positioned between adjacent lithium batteries in the lithium battery module conduct the heat generated during operation to the heat dissipation cavity of the heat sink plate, preventing the lithium batteries from overheating. Since the heat dissipation cavity is filled with a phase change layer—a material that undergoes a phase change at a specific temperature, such as changing from a solid to a liquid state or vice versa—when heat is transferred from the heat dissipation pipes to the heat dissipation cavity, the phase change layer absorbs this heat and undergoes a phase change, effectively storing the heat. Furthermore, the lower end of the heat sink plate extends into the coolant in the liquid cooling tank, allowing heat in the heat dissipation cavity to be directly transferred to the coolant. After absorbing the heat, the coolant circulates, carrying the heat away and dissipating it into the environment, thus maintaining the continuous and efficient operation of the heat dissipation system.
[0021] By combining heat pipes, a phase change layer, and a liquid cooling system, the heat generated by the lithium battery during operation can be effectively dissipated, preventing overheating and damage. Furthermore, the efficient heat dissipation capabilities of the phase change layer and coolant ensure stable operation of the battery energy storage device in high-temperature environments. This effectively improves upon the problem of poor heat dissipation in traditional battery energy storage devices, which easily leads to heat accumulation internally and affects their cycle life. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;
[0023] Figure 2 This is a top view of an embodiment of this application;
[0024] Figure 3 It is along Figure 2 A schematic diagram of a partial cross-sectional view of line AA in the middle.
[0025] Explanation of reference numerals in the attached drawings: 1. Lithium battery module; 2. Lithium battery protection structure; 3. Heat sink; 4. Heat sink plate; 41. Heat sink cavity; 411. Phase change layer; 42. Telescopic sleeve; 43. Mounting bracket; 44. Control switch; 5. Liquid cooling box; 51. Stirring motor; 52. Stirring paddle; 6. Sealing gasket; 7. Support plate. Detailed Implementation
[0026] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0027] This application discloses a battery energy storage device. (Refer to...) Figures 1 to 3A battery energy storage device includes a lithium battery module 1 and a lithium battery protection structure 2. A heat dissipation pipe 3 is provided between adjacent lithium batteries in the lithium battery module 1. A heat dissipation plate 4 is provided at the lower end of the lithium battery protection structure 2. A heat dissipation cavity 41 is opened in the heat dissipation plate 4. The upper end of the heat dissipation pipe 3 is closed and the lower end extends out of the lithium battery protection structure 2 and communicates with the heat dissipation cavity 41 of the heat dissipation plate 4 to form a complete heat dissipation channel. The heat dissipation plate 4 is filled with a phase change layer 411 in the heat dissipation cavity 41. The phase change layer 411 is specifically a composite phase change material layer of acetone working fluid and boron nitride nanosheets. A liquid cooling box 5 filled with coolant is provided at the lower end of the heat dissipation plate 4, and the lower end of the heat dissipation plate 4 extends into the coolant in the liquid cooling box 5.
[0028] In this way, when the battery energy storage device generates a large amount of heat during operation, the multiple heat dissipation pipes 3 arranged between adjacent lithium batteries in the lithium battery module 1 conduct the heat generated by the lithium batteries during operation to the heat dissipation cavity 41 of the heat dissipation plate 4, preventing the lithium batteries from overheating. Since the heat dissipation cavity 41 is filled with a phase change layer 411, which is a material that undergoes a phase change at a specific temperature, such as changing from a solid to a liquid state or vice versa, when the heat in the heat dissipation pipes 3 is transferred to the heat dissipation cavity 41, the phase change layer 411 will absorb this heat and undergo a phase change, thereby effectively storing the heat. Furthermore, the lower end of the heat dissipation plate 4 extends into the coolant in the liquid cooling tank 5, so that the heat in the heat dissipation cavity 41 can be directly transferred to the coolant through the heat dissipation plate 4. After absorbing the heat, the coolant will circulate, carrying away the heat and dissipating it into the environment, thereby maintaining the continuous and efficient operation of the heat dissipation system.
[0029] By combining the heat pipe 3, the phase change layer 411, and the liquid cooling system, the heat generated by the lithium battery during operation can be effectively dissipated, preventing overheating and damage. Furthermore, the efficient heat dissipation capabilities of the phase change layer 411 and the coolant ensure stable operation of the battery energy storage device in high-temperature environments. This effectively improves upon the problem of poor heat dissipation in traditional battery energy storage devices, which easily leads to heat accumulation internally and affects their cycle life.
[0030] Specifically, refer to Figure 1 A telescopic sleeve 42 is provided on the upper end face of the heat sink 4. The upper end of the telescopic sleeve 42 is closed and the lower end is connected to the heat dissipation cavity 41 of the heat sink 4.
[0031] Furthermore, referring to Figures 1 to 3 A stirring motor 51 is provided on one side of the liquid cooling box 5 corresponding to the telescopic sleeve 42. The output end of the stirring motor 51 extends into the liquid cooling box 5 and is parallel to the heat sink 4. A stirring paddle 52 is coaxially fixed to the output end of the stirring motor 51.
[0032] Furthermore, referring to Figure 1A mounting bracket 43 is provided on the heat sink 4 near the telescopic sleeve 42. A control switch 44 for controlling the start and stop of the stirring motor 51 is provided on the side of the mounting bracket 43 facing the telescopic sleeve 42. The distance between the control surface of the control switch 44 and the telescopic sleeve 42 is less than the displacement amount that causes the phase change layer 411 to expand and the free end of the telescopic sleeve 42 to move closer to the control surface of the control switch 44 when the temperature of the lithium battery module 1 exceeds the set temperature.
[0033] Under normal operating conditions, the heat generated by the lithium battery is transferred to the heat dissipation cavity 41 through the heat dissipation pipe 3, and the phase change layer 411 absorbs this heat and undergoes a phase change. At the same time, the coolant circulates in the liquid cooling tank 5 and absorbs the heat from the heat dissipation cavity 41 through the heat dissipation plate 4.
[0034] When the internal temperature of the lithium battery module 1 is too high, the phase change layer 411 undergoes a phase change, absorbs a large amount of heat, and expands in volume, thereby pushing the free end of the telescopic sleeve 42 closer to the control switch 44. Once the displacement reaches the trigger threshold, the control switch 44 will start the stirring motor 51. The start of the stirring motor 51 drives the stirring paddle 52 to rotate in the coolant, generating turbulence and enhancing the heat exchange efficiency of the coolant. This helps to remove the heat from the heat sink 4 more quickly and reduce the temperature of the lithium battery module 1.
[0035] When the temperature of lithium battery module 1 drops below a set threshold, the phase change layer 411 releases latent heat of phase change and shrinks in volume, thereby causing the free end of the telescopic sleeve 42 to move away from the control switch 44. When the control switch 44 resets, it controls the stirring motor 51 to stop working. Through the effective combination of the telescopic sleeve 42, the stirring motor 51, and the control switch 44, a highly efficient automatic temperature control and heat dissipation system is achieved. This not only improves heat dissipation efficiency but also enhances the safety and reliability of the system.
[0036] Furthermore, referring to Figures 1 to 3 A thermal grease layer (not shown in the figure) is applied at the intersection of heat pipe 3 and lithium battery module 1. Thermal grease is a material with high thermal conductivity, which can effectively transfer the heat generated by the lithium battery to the heat dissipation system through heat pipe 3. Applying thermal grease can fill the tiny gap between heat pipe 3 and lithium battery, reduce thermal resistance, and thus improve heat conduction efficiency; it can also distribute heat evenly and prevent local overheating.
[0037] Furthermore, referring to Figure 1The telescopic sleeve 42 can be detachably installed on the heat sink 4. In this way, when the performance of the telescopic sleeve 42 deteriorates due to long-term use or environmental factors such as dust accumulation or aging, it can be easily removed and cleaned or replaced to restore the heat dissipation performance of the system. Furthermore, different application scenarios may have different requirements for the heat dissipation system. With the detachable telescopic sleeve 42, the appropriate type or specification of the telescopic sleeve 42 can be selected according to actual needs to meet the heat dissipation requirements of specific scenarios.
[0038] Furthermore, referring to Figure 1 The telescopic sleeve 42 has a threaded sleeve (not shown in the figure) fixed at its open end, and the heat sink 4 has a threaded hole (not shown in the figure). The threaded sleeve and the threaded hole are threadedly matched. This design further enhances the connection stability and replaceability between the telescopic sleeve 42 and the heat sink 4.
[0039] At the same time, refer to Figure 1 A sealing gasket 6 is provided at the connection between the telescopic sleeve 42 and the heat sink 4. The sealing gasket 6 is usually made of a highly elastic, corrosion-resistant and wear-resistant material. In addition to further improving the sealing performance between the telescopic sleeve 42 and the heat sink 4, the sealing gasket 6 can also reduce the risk of loosening caused by vibration or temperature changes by filling the tiny gap between the two, thereby enhancing the connection stability between the telescopic sleeve 42 and the heat sink 4 to a certain extent.
[0040] Additionally, refer to Figures 1 to 3 The heat sink 4 is fixedly connected to the support plate 7 on its periphery, which provides a stable support platform for the heat sink 4. This helps to ensure the correct position of the heat sink 4 in the liquid cooling box 5 and prevent displacement or tilting caused by vibration or improper operation. The heat sink 4 is inserted into the liquid cooling box 5, which simplifies the installation process and reduces the difficulty and cost of maintenance.
[0041] This application discloses a battery energy storage power station, based on the aforementioned battery energy storage device, with reference to... Figures 1 to 3 A battery energy storage power station includes the aforementioned battery energy storage device.
[0042] The implementation principle of a battery energy storage device according to an embodiment of this application is as follows:
[0043] When the battery storage device generates significant heat during operation, multiple heat dissipation pipes 3 arranged between adjacent lithium batteries in the lithium battery module 1 conduct the heat generated during operation to the heat dissipation cavity 41 of the heat dissipation plate 4, preventing the lithium batteries from overheating. Since the heat dissipation cavity 41 is filled with a phase change layer 411, which is a material that undergoes a phase change at a specific temperature, such as changing from a solid to a liquid state or vice versa, when the heat from the heat dissipation pipes 3 is transferred to the heat dissipation cavity 41, the phase change layer 411 absorbs this heat and undergoes a phase change, thereby effectively storing the heat. Furthermore, the lower end of the heat dissipation plate 4 extends into the coolant in the liquid cooling tank 5, allowing the heat in the heat dissipation cavity 41 to be directly transferred to the coolant through the heat dissipation plate 4. After absorbing the heat, the coolant circulates, carrying away the heat and dissipating it into the environment, thereby maintaining the continuous and efficient operation of the heat dissipation system.
[0044] By combining the heat pipe 3, the phase change layer 411, and the liquid cooling system, the heat generated by the lithium battery during operation can be effectively dissipated, preventing overheating and damage. Furthermore, the efficient heat dissipation capabilities of the phase change layer 411 and the coolant ensure stable operation of the battery energy storage device in high-temperature environments. This effectively improves upon the problem of poor heat dissipation in traditional battery energy storage devices, which easily leads to heat accumulation internally and affects their cycle life.
[0045] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A battery energy storage comprising a lithium electric module (1) and a lithium electric protection structure (2), characterized in that, In the lithium battery module (1), heat dissipation pipes (3) are provided between adjacent lithium batteries. A heat dissipation plate (4) is provided at the lower end of the lithium battery protection structure (2). A heat dissipation cavity (41) is opened in the heat dissipation plate (4). The upper end of the heat dissipation pipe (3) is closed and the lower end extends out of the lithium battery protection structure (2) and communicates with the heat dissipation cavity (41) of the heat dissipation plate (4). The heat dissipation plate (4) is filled with a phase change layer (411) in the heat dissipation cavity (41). The lower end of the heat sink (4) is provided with a liquid cooling tank (5) filled with coolant, and the lower end of the heat sink (4) extends into the coolant in the liquid cooling tank (5); The upper end face of the heat sink (4) is provided with a telescopic sleeve (42), the upper end of the telescopic sleeve (42) is closed, and the lower end is connected to the heat dissipation cavity (41) of the heat sink (4); The liquid cooling box (5) is provided with a stirring motor (51) on one side corresponding to the telescopic sleeve (42). The output end of the stirring motor (51) extends into the liquid cooling box (5) and is parallel to the heat sink (4). The output end of the stirring motor (51) is coaxially fixed with a stirring paddle (52). The heat sink (4) is provided with a mounting bracket (43) near the telescopic sleeve (42). The mounting bracket (43) is provided with a control switch (44) for controlling the start and stop of the stirring motor (51) on the side facing the telescopic sleeve (42). The distance between the control surface of the control switch (44) and the telescopic sleeve (42) is less than the displacement amount that would occur when the temperature of the lithium battery module (1) exceeds the set temperature, causing the phase change layer (411) to expand and the free end of the telescopic sleeve (42) to move closer to the control surface of the control switch (44).
2. A battery energy store according to claim 1, characterized in that A thermally conductive silicone grease layer is coated at the intersection of the heat dissipation pipe (3) and the lithium battery module (1).
3. A battery energy store according to claim 1, characterized in that The telescopic sleeve (42) can be detachably installed on the heat sink (4).
4. A battery energy store according to claim 3, characterized in that The telescopic sleeve (42) has a threaded sleeve fixedly connected to its open end, and the heat sink (4) has a threaded hole. The threaded sleeve is threadedly matched with the threaded hole.
5. A battery energy store according to claim 4, characterized in that A sealing gasket (6) is provided at the connection between the telescopic sleeve (42) and the heat sink (4).
6. A battery energy store according to claim 1, characterized in that The heat sink (4) is fixedly connected to a support plate (7) on its periphery, and the heat sink (4) is inserted into the liquid cooling box (5).
7. A battery energy storage plant characterized in that, Includes a battery energy storage device as described in any one of claims 1-6.