Multi-layer composite liquid cooling plate

Abstract

The utility model discloses a multi-layer composite liquid cooling plate, and relates to the field of energy storage, the multi-layer composite liquid cooling plate comprises a flame retardant layer, a liquid storage layer, a structural layer, a heat insulation layer and a cooling layer from top to bottom, and the cooling layer is internally provided with a plurality of cooling flow channels; the liquid storage layer is provided with a liquid storage bin which is horizontally arranged; a plurality of cooling runners in the cooling layer are connected with a liquid inlet and a liquid outlet, the liquid inlet is connected with an external liquid cooling device through a pipeline, and the liquid outlet is connected with a liquid storage bin in the liquid storage layer; the liquid storage bin is provided with a second liquid outlet, and the second liquid outlet is connected with an external liquid cooling device; a plurality of water outlets sealed by rubber blocks are formed between the liquid storage bin of the liquid storage layer and the heat insulation layer. According to the liquid cooling plate, the safety performance of an energy storage system in a fire disaster can be remarkably improved, the durability and reliability of the energy storage system in a complex environment can be enhanced, and therefore safer and more stable operation guarantee is provided for the energy storage system.

Description

Technical Field

[0001] This application relates to the field of energy storage, and particularly to a multi-layer composite liquid cooling plate. Background Art

[0002] In the prior art, the liquid cooling system of energy storage batteries mainly adopts the design of liquid cooling plates. This design places the liquid cooling plates at the bottom or side of the energy storage battery module, and provides cooling for the battery pack in a liquid circulation manner to ensure the stability and lifespan of the battery under high load and high temperature environments. However, in practical applications, the liquid cooling plates have shown significant deficiencies in the face of the ignition of energy storage batteries.

[0003] Firstly, when an energy storage battery catches fire, the flame will spread rapidly upwards, and the existing liquid cooling plates do not have the function of extinguishing fires or delaying the spread of the fire. This means that the flame can easily pass through the liquid cooling plates and quickly spread to other parts of the battery module, or even spread to the entire energy storage device. Such a rapid spread of the fire not only poses a great threat to the surrounding environment, but also significantly shortens the time for dealing with the fire and increases the difficulty of controlling the fire situation and implementing emergency measures.

[0004] Secondly, the design and installation position of traditional liquid cooling plates are usually at the bottom of energy storage batteries, making them vulnerable to damage when the energy storage device is subjected to external impacts or encounters obstacles. For example, during transportation and installation, the liquid cooling plates may crack or deform due to collisions or vibrations, resulting in coolant leakage or a decrease in cooling efficiency. More seriously, in the actual use environment, the bottom of the energy storage device touches the ground and is easily damaged by uneven road surfaces or sharp objects, which further reduces the reliability and durability of the liquid cooling plates.

[0005] In addition, the material and structural design of traditional liquid cooling plates show certain limitations in high temperature environments. When thermal runaway occurs inside the energy storage battery pack, the heat resistance of the liquid cooling plate material is insufficient to effectively prevent the penetration of high temperature flames, resulting in the rapid spread of the flame. In this case, the liquid cooling plates not only cannot play a protective role, but may instead become a path for the spread of the fire, exacerbating the severity of the fire.

[0006] In summary, the deficiencies shown by the existing liquid cooling plates in the face of the ignition of energy storage batteries and external impacts seriously affect the safety and reliability of the energy storage system. Developing a composite liquid cooling plate that can effectively block the spread of flames and improve its impact resistance has important significance and value. Utility Model Content

[0007] The purpose of this application is to at least overcome one deficiency existing in the prior art, and provide a multi-layer composite liquid cooling plate. This liquid cooling plate can not only significantly improve the safety performance of the energy storage system in case of fire, but also enhance its durability and reliability in complex environments, thereby providing a safer and more stable operation guarantee for the energy storage system.

[0008] To achieve the above purpose, this application discloses a multi-layer composite liquid cooling plate, which from top to bottom are a flame retardant layer, a liquid storage layer, a structure layer, a heat insulation layer, and a cooling layer. Among them, several cooling channels are provided in the cooling layer; the liquid storage layer has a horizontally arranged liquid storage bin; several cooling channels in the cooling layer are connected to a liquid inlet and a liquid outlet. The liquid inlet is connected to an external liquid cooling device through a pipeline, and the liquid outlet is connected to the liquid storage bin in the liquid storage layer; the liquid storage bin has a second liquid outlet, which is connected to the external liquid cooling device; several water outlets sealed by rubber blocks are provided between the liquid storage bin of the liquid storage layer and the heat insulation layer.

[0009] In some embodiments, the heat insulation layer is formed by the interval cooperation of the structure layer and the cooling layer, and several heat insulation pads are provided between the cooling layer and the structure layer.

[0010] In other embodiments, the heat insulation layer is a solid layer composed of heat insulation plates, and the flame retardant layer, the liquid storage layer, the structure layer, the heat insulation layer, and the cooling layer are fixed together by bonding.

[0011] In some embodiments, the cooling layer is composed of at least one horizontally distributed cooling plate, several straight channels are provided in the cooling plate, and several flow disturbing blocks are arranged axially in the straight channels, and the height of the flow disturbing blocks is lower than 1 / 2 of the channel height.

[0012] Furthermore, the cross-section of the flow disturbing block is in a W shape.

[0013] In some embodiments, several bolt holes for installing and fixing the multi-layer composite liquid cooling plate are provided at the position of the structure layer near the outer edge.

[0014] Compared with the prior art, the multi-layer composite liquid cooling plate includes a flame retardant layer and a heat insulation layer, which can effectively block the spread of flames, prevent the rapid spread of fire, and improve the safety of the energy storage system in case of fire.

[0015] When the battery is out of control at high temperature or even catches fire, the liquid storage layer can continue to play a role after the cooling plate is partially burned through, providing cooling, temperature reduction, and even fire extinguishing effects, thereby further controlling the fire and protecting the battery module and the surrounding environment.

[0016] The beneficial effects listed above do not exhaust all the advantages. Other potential beneficial effects and detailed technical implementation manners will be further revealed in the embodiments or other description parts of this application. Description of the Drawings

[0017] After reading the following detailed description in conjunction with the accompanying drawings, various aspects of the present disclosure will be better understood. In the drawings, the positions, dimensions, and ranges of the various structures shown, etc., sometimes do not represent the actual positions, dimensions, and ranges, etc. In the drawings:

[0018] Figure 1 is a schematic diagram of a structure of an embodiment disclosed in the present application from a three-dimensional perspective.

[0019] Figure 2 is an exploded view of a structure of an embodiment disclosed in the present application from a side perspective.

[0020] Figure 3 is an exploded view of a structure of an embodiment disclosed in the present application from another perspective.

[0021] Figure 4 is a schematic diagram of a structure of an embodiment disclosed in the present application with the liquid storage layer and the cooling layer cooperating.

[0022] Figure 5 is a schematic diagram of the internal structure of the cooling layer of an embodiment disclosed in the present application.

[0023] Figure 6 is a schematic diagram of the structure of a turbulator block of an embodiment disclosed in the present application. Detailed Description

[0024] The following will describe the present disclosure with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and to fully explain the protection scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0025] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for clarity, the dimensions of some features may be distorted.

[0026] It should be understood that the terms used in the specification are only for describing specific embodiments and are not intended to limit the present disclosure. All terms used in the specification (including technical terms and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said techniques, methods, and devices should be regarded as part of the authorized specification.

[0027] As used in the specification, the singular forms "a", "the" and "said" include the plural forms unless clearly indicated. The terms "comprising", "including" and "containing" as used in the specification denote the presence of the claimed features, but do not preclude the presence of one or more other features. The term "and / or" as used in the specification includes any and all combinations of one or more of the associated listed items. Embodiment

[0028] As Figures 1 to 6 As shown, this embodiment describes a specific implementation of a multi-layer composite liquid cooling plate, including its structural composition, connection and cooperation relationships, and detailed descriptions of each component. The liquid cooling plate sequentially includes a flame retardant layer 1, a liquid storage layer 2, a structural layer 3, a heat insulation layer 4, and a cooling layer 5 from top to bottom. The following is a detailed description of the specific structure and working principle.

[0029] The uppermost layer of the liquid cooling plate is the flame retardant layer 1, which is made of high-performance flame retardant materials such as polyimide or ceramic fiber. The flame retardant layer 1 is mainly used to effectively block the spread of flames in the event of a battery fire, preventing the fire from spreading to other parts of the battery module through the liquid cooling plate, thereby improving the safety of the energy storage system in a fire.

[0030] Below the flame retardant layer 1 is the liquid storage layer 2, which is provided with a horizontally arranged liquid storage chamber 6. The liquid storage chamber 6 is made of high-temperature and high-pressure resistant metal materials (such as stainless steel or aluminum alloy).

[0031] In this embodiment, the design of the liquid storage chamber 6 can provide cooling, temperature reduction and fire extinguishing functions in the event of high-temperature runaway or even fire. When the cooling plate is partially burned through, the coolant in the liquid storage chamber 6 is sprayed onto the fire source through a preset water outlet, effectively suppressing the spread of the flame.

[0032] On the mating surface of the liquid storage chamber 6 and the heat insulation layer 4, there is a water outlet 13 sealed by a number of rubber blocks 12.

[0033] It can be understood that these rubber blocks 12 will melt at high temperatures, allowing the coolant to flow out quickly for fire extinguishing.

[0034] In this embodiment, the structural layer 3 is located below the liquid storage layer 2 and is mainly used to support the structural stability of the entire liquid cooling plate. This layer is usually made of high-strength metal or composite materials (for example, a composite board made of glass fiber), and there are a number of bolt holes for installation and fixation near its outer edge. These holes are connected to the external frame through bolts to ensure the installation of the liquid cooling plate and prevent it from shifting or being damaged due to vibration or impact during use. The design of the structural layer 3 not only enhances the overall strength of the liquid cooling plate but also provides a stable support base for other layers to effectively perform their functions.

[0035] The heat insulation layer 4 is located between the structural layer 3 and the cooling layer 5. Its main function is to isolate heat, prevent the cooling layer 5 from absorbing heat and cooling down the structural layer, and improve the heat absorption efficiency of the cooling layer 5.

[0036] More specifically, as a practical option, the heat insulation layer 4 can be composed of a variety of materials, such as a solid layer formed by heat insulation boards or formed by the spaced cooperation between the structural layer 3 and the cooling layer 5.

[0037] As another practical option, using a heat insulation pad structure (not shown in the figure), these pads are usually made of rubber or other heat insulation materials to provide good heat insulation effect. The design of the heat insulation layer 4 can effectively reduce heat transfer, improve the efficiency of the cooling system, and ensure the safety of the battery pack in a high-temperature environment.

[0038] The bottom layer is the cooling layer 5, which is provided with a number of cooling channels 7 inside. The cooling layer 5 is usually made of a metal material with high thermal conductivity (such as copper or aluminum) to ensure good heat dissipation effect. These cooling channels 7 are connected to an external liquid cooling device through an inlet 9. The coolant enters from the inlet 9, undergoes heat exchange through the channels, and then flows out from the outlet 10, and then returns to the liquid cooling device through a pipeline for circulation. Turbulence blocks 8 are arranged axially inside the cooling channels 7, and the height of the turbulence blocks 8 is lower than 1 / 3 of the channel height. The cross-section of these turbulence blocks 8 is in a W shape, which can increase the turbulence of the coolant and improve the heat exchange efficiency. The turbulence formed by the coolant in the channels helps to improve the heat transfer effect, thereby effectively reducing the battery temperature and preventing overheating.

[0039] It should be understood that arranging a number of W-shaped turbulence blocks 8 axially along the cooling channels 7 plays a key role in the design of the multi-layer composite liquid cooling plate. The cross-section of the turbulence blocks 8 is designed in a W shape, which changes the flow path of the coolant in the channels, thereby increasing the turbulence effect of the fluid. The W-shaped cross-section has more surface curvatures compared to the traditional circular or rectangular cross-sections, which makes the coolant generate more complex flow trajectories and turbulence regions when flowing through.

[0040] When the coolant enters the cooling channels 7, the fluid will flow along the axial direction of the channels. When it encounters the turbulence blocks 8, the flow path is forced to change. The coolant bypasses the protruding and recessed parts of the W shape, thus forming multiple turns and re-convergences. Due to the complex geometric shape of the W-shaped turbulence blocks 8, the coolant will be disturbed multiple times during the flow process. These disturbances cause drastic changes in the fluid velocity and pressure, thereby generating a large amount of turbulence. The generation of turbulence enables the fluid particles in the coolant to contact the inner wall of the cooling channels 7 and the surface of the turbulence blocks 8 more frequently, thereby improving the heat transfer efficiency.

[0041] The presence of turbulence significantly increases the convective heat transfer coefficient between the fluid and the inner wall of the cooling channel 7. This is because turbulence can disrupt the fluid boundary layer, enabling high-temperature fluid to be quickly replaced by low-temperature fluid, thereby accelerating heat transfer. The turbulence effect induced by the W-shaped turbulator 8 in the cooling channel 7 allows the coolant to more efficiently carry away the heat generated by the battery module and maintain the operating temperature of the battery within a safe range.

[0042] During operation, when the energy storage battery pack is in a high-load or high-temperature environment, the coolant circulates through the cooling channel 7 to carry away excess heat, thus maintaining the normal operating temperature of the battery pack. If a thermal runaway or fire occurs in the battery pack, the coolant in the liquid storage layer 2 will automatically spray through the water outlet sealed by the rubber block for cooling and fire extinguishing, ensuring that the fire is effectively controlled and preventing the spread of the fire.

[0043] Through the above design, the multi-layer composite liquid cooling plate not only significantly improves the safety performance of the energy storage system in case of fire, but also enhances its durability and reliability in complex environments, providing a safer and more stable operation guarantee. When the cooling plate is partially burned through in the event of a high-temperature thermal runaway or even a fire in the battery, the liquid storage layer 2 can perform certain cooling and temperature reduction, and even fire extinguishing, thereby effectively suppressing the spread of the flame and protecting the battery module and the surrounding environment.

[0044] To better understand the application scenario of this embodiment, assume that in a high-temperature environment, the energy storage battery pack undergoes thermal runaway due to overheating, resulting in a fire in a local area. A traditional liquid cooling plate may not be able to block the spread of the fire in this situation, while the multi-layer composite liquid cooling plate in this embodiment first blocks the flame through its flame-retardant layer 1, and then the liquid storage layer 2 quickly sprays the coolant for temperature reduction and fire extinguishing, effectively curbing the fire and protecting other battery modules and equipment. This design not only improves the safety of the system but also extends the service life of the equipment.

[0045] Although the exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without substantially departing from the spirit and scope of the present disclosure. Therefore, all changes and modifications are included within the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and equivalents of these claims are also included.

Claims

1. A multi-layer composite liquid cooling plate, characterized in that: From top to bottom are a flame retardant layer, a liquid storage layer, a structural layer, a heat insulation layer, and a cooling layer. Among them, there are several cooling channels in the cooling layer; the liquid storage layer has a horizontally arranged liquid storage bin; several cooling channels in the cooling layer are connected to a liquid inlet and a liquid outlet. The liquid inlet is connected to an external liquid cooling device through a pipeline, and the liquid outlet is connected to the liquid storage bin in the liquid storage layer; the liquid storage bin has a second liquid outlet, and this second liquid outlet is connected to the external liquid cooling device; there are several water outlets sealed by rubber blocks between the liquid storage bin of the liquid storage layer and the heat insulation layer.

2. The multi-layer composite liquid cooling plate as described in claim 1, wherein: The heat insulation layer is formed by the structural layer and the cooling layer being spaced and matched, and there are several heat insulation pads between the cooling layer and the structural layer.

3. The multi-layer composite liquid cooling plate as described in claim 1, wherein: The heat insulation layer is a solid layer composed of heat insulation boards, and the flame retardant layer, the liquid storage layer, the structural layer, the heat insulation layer, and the cooling layer are fixed together by bonding.

4. A multi-layer composite liquid cooling plate as described in claim 1, characterized in that: The cooling layer is composed of at least one horizontally distributed cooling plate. There are several straight channels in the cooling plate, and several flow disturbing blocks are arranged along the axial direction in the straight channels. The height of the flow disturbing blocks is lower than 1 / 2 of the height of the channels.

5. A multi-layer composite liquid cooling plate as described in claim 4, characterized in that: The cross-section of the flow disturbing block is in a W shape.

6. The multi-layer composite liquid cooling plate as described in claim 1, wherein: There are several bolt holes for installing and fixing the multi-layer composite liquid cooling plate at positions near the outer edge of the structural layer.

Images