Static immersion type direct cooling heat dissipation mode energy pack for energy storage
By using a static immersion direct cooling heat dissipation method in the energy pack, the energy module is immersed in the coolant and heat exchanged using the direct cooling tube, the problems of low heat dissipation efficiency and large temperature difference of the battery cell in the prior art are solved, and uniform heat dissipation and extended battery cell life are achieved.
Patent Information
- Application Number
- CN202421689490.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the existing energy-pack heat dissipation technology, forced air cooling has a small thermal conductivity and low heat dissipation efficiency. However, because the liquid cooling only contacts the bottom of the battery cell, the temperature difference between the bottom of the battery cell and the top of the battery cell is large, affecting the service life of the battery cell.
The static immersion direct cooling heat dissipation method is adopted. By installing a cavity in the shell to accommodate coolant and immerse the energy module in the coolant. The direct cooling tube is used to set it around the energy module. The coolant is heat-exchanged through the direct cooling tube to achieve uniform heat dissipation.
It improves heat dissipation efficiency, ensures the temperature uniformity of the energy module, extends the service life of the battery cell and stabilizes the performance.
Smart Images
Figure CN223273348U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to an energy pack with a static immersion direct cooling and heat dissipation method for energy storage. Background Art
[0002] Energy packs are energy storage devices commonly used in electric vehicles, energy storage systems, and other applications requiring stored electrical energy. They typically consist of multiple battery cells or supercapacitors connected in parallel, series, or other combinations to achieve the desired voltage and capacity. However, heat dissipation has been a significant concern in existing energy packs.
[0003] To address heat dissipation, existing energy packs primarily employ forced air cooling and plate-type liquid cooling. Forced air cooling uses air as a heat exchange medium, circulating it through the energy pack and utilizing the temperature difference between the battery cells and the air for heat transfer. This cooling method is simple, easy to maintain, and low-cost. However, its low thermal conductivity and low heat dissipation efficiency make it unsuitable for high-power scenarios. More importantly, due to the structural design required to facilitate air circulation, this solution fails to meet the IP67 sealing requirements and is susceptible to ambient temperature.
[0004] Another major heat dissipation method is plate liquid cooling, which uses liquid (such as water, ethanol, silicone oil, etc.) as a coolant to dissipate heat through indirect contact with the bottom of the battery cell. Compared with air cooling, the liquid cooling system has a higher specific heat capacity and heat conduction efficiency and better heat dissipation effect because it uses liquid as a heat dissipation medium. However, the structure of such a system is complex, and its application in energy storage systems is more difficult than air cooling. In addition, since the liquid cooling only contacts the bottom of the battery cell, the temperature difference between the bottom and top of the battery cell is large (for example, the temperature difference between the bottom and top of a commonly used 280Ah battery cell is about 13°C), which affects the service life of the battery cell. Utility Model Content
[0005] The purpose of the present utility model is to provide an energy pack with a static immersion direct cooling heat dissipation method for energy storage, so as to solve the problem raised in the above background technology: in the existing energy pack heat dissipation technology, the thermal conductivity of forced air cooling is small and the heat dissipation efficiency is low, while the plate liquid cooling only contacts the bottom of the battery cell, resulting in a large temperature difference between the bottom and top of the battery cell (for example, the temperature difference between the bottom and top of a commonly used 280Ah battery cell is about 13°C), which affects the service life of the battery cell.
[0006] To achieve the above objectives, according to one aspect of the present disclosure, there is provided an energy pack for energy storage using a static immersion direct cooling and heat dissipation method, characterized in that it includes:
[0007] a housing, wherein a cavity for containing a cooling liquid is provided in the housing;
[0008] an energy module, the energy module being disposed in the cavity and being configured to be immersed in the coolant;
[0009] A direct cooling pipe is used to pass refrigerant, the pipe portion of the direct cooling pipe is arranged in the cavity, the inlet and outlet of the direct cooling pipe are arranged outside the shell, the direct cooling pipe is arranged around the energy module, and the direct cooling pipe is used to be immersed in the coolant.
[0010] In a possible implementation, the shell includes a bottom shell and an upper cover. The cavity is provided in the bottom shell. The upper cover covers the cavity and is sealed with the bottom shell to form the shell.
[0011] In a possible implementation, the bottom shell and the upper cover are both made of metal.
[0012] In a possible implementation, the direct cooling pipe is a copper-based pipe.
[0013] In a possible implementation, the inlet and outlet of the direct cooling pipe are both arranged on the front side of the shell.
[0014] In a possible implementation, the direct cooling pipe is not in direct contact with the energy module.
[0015] In a possible implementation, the coolant is oil-based, water-based, or fluorine-based liquid cooling.
[0016] The above one or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
[0017] In an energy pack with a static immersion direct cooling heat dissipation method for energy storage provided in an embodiment of the utility model, by setting a cavity in the shell to accommodate the coolant, and setting the energy module in this cavity, the entire energy module can be immersed in the coolant, so that all the heat generated by the energy module can be evenly transferred to the coolant through contact. This direct contact heat dissipation method greatly improves the heat dissipation efficiency, so that the temperature can be quickly and evenly transferred from the energy module to the coolant. At the same time, after the refrigerant is introduced into the direct cooling pipe, the coolant is then heat exchanged by contacting the direct cooling pipe. This heat exchange method can not only ensure the cooling effect of the coolant, but also evenly take away the heat generated by the energy module, ensuring the stable operating temperature of the energy module, thereby ensuring the improvement of the heat dissipation efficiency while ensuring the extension of the service life of the energy module and the stability of its performance.
[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic diagram of the decomposed structure of an energy pack for energy storage using a static immersion direct cooling and heat dissipation method provided in an embodiment of the present application;
[0020] Figure 2 A schematic diagram of the overall structure of an energy pack for energy storage using a static immersion direct cooling method provided in an embodiment of the present application;
[0021] Figure 3 A schematic diagram of the decomposed structure of an energy pack for energy storage using a static immersion direct cooling and heat dissipation method provided in an embodiment of the present application;
[0022] Figure 4 Schematic diagram of the internal structure of an energy pack using a static immersion direct cooling method for energy storage provided in an embodiment of the present application.
[0023] Explanation of the reference numerals: 100, shell; 110, cavity; 111, coolant; 120, bottom shell; 130, upper cover; 200, energy module; 300, direct cooling pipe; 310, pipeline part; 320, inlet; 330, outlet. DETAILED DESCRIPTION
[0024] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0025] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of structures and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
[0026] See also Figures 1 to 4 The energy package of this static immersion direct cooling method includes:
[0027] The housing 100 has a cavity 110 for containing a cooling liquid 111 therein;
[0028] Energy module 200 is disposed within cavity 110 and is submerged in coolant 111. Energy module 200 may include a group of cells or batteries connected in parallel, series, or other manners. Since energy module 200 is completely submerged in coolant 111, heat dissipation efficiency is effectively improved. Furthermore, since coolant 111 is evenly distributed across the surface of energy module 200, uniform heat dissipation across the entirety of energy module 200 is ensured.
[0029] The direct cooling pipe 300 is used to pass the refrigerant. The pipe portion 310 of the direct cooling pipe 300 is arranged in the cavity 110, and the inlet and outlet of the direct cooling pipe 300 are arranged outside the shell 100. The direct cooling pipe 300 is arranged around the energy module 200, and the direct cooling pipe 300 is used to be immersed in the coolant 111. The direct cooling pipe 300 can be a pipe made of copper-based pipe or other good thermal conductive material, which can effectively take away the heat of the coolant 111 and improve the heat dissipation efficiency. At the same time, since the inlet and outlet 330 of the direct cooling pipe 300 is arranged outside the shell 100, it can be conveniently connected to external pipes or equipment, so that the refrigerant can circulate in the system to provide a cooling effect.
[0030] Specifically, by designing a cavity 110 within the housing 100 to accommodate the coolant 111 and positioning the energy module 200 within this cavity 110, the entire energy module 200 can be immersed in the coolant 111, allowing all heat generated by the energy module 200 to be evenly transferred to the coolant 111 through contact. This direct contact heat dissipation method greatly improves heat dissipation efficiency, allowing temperature to be quickly and evenly transferred from the energy module 200 to the coolant 111. Simultaneously, when refrigerant is introduced into the direct cooling tube 300, the coolant 111 further exchanges heat through contact with the direct cooling tube 300. This heat exchange method not only ensures the cooling effect of the coolant 111, but also evenly removes the heat generated by the energy module 200, ensuring a stable operating temperature for the energy module 200. This improves heat dissipation efficiency while also extending the service life and performance of the energy module 200.
[0031] See also Figure 1The shell 100 includes a bottom shell 120 and an upper cover 130. The bottom shell 120 is provided with a cavity 110. The upper cover 130 covers the cavity 110 and is sealed with the bottom shell 120 to form the shell 100. Specifically, the upper cover 130 can be sealed with the bottom shell 120 by bolts, tenons, bayonets or other mechanical connection methods, thereby preventing the coolant 111 from leaking, and preventing external debris and moisture from entering the interior of the shell 100, protecting internal components (such as the energy module 200 and the direct cooling pipe 300, etc.) from environmental influences. In addition, the design of the upper cover 130 can also facilitate the replacement or maintenance of the energy module 200. It is only necessary to open the upper cover 130 to enter the interior of the shell 100, replace or maintain the energy module 200, and then reseal the upper cover 130 on the bottom shell 120. The operation is simple, convenient and fast.
[0032] Furthermore, the bottom shell 120 and the upper cover 130 are both made of metal. Specifically, first of all, the metal material has good thermal conductivity and can conduct away the heat conducted from the energy module 200 to the coolant 111, which is beneficial to ensure the heat dissipation effect of the energy module 200 and extend the service life of the energy module 200. Secondly, the metal material has high strength and wear resistance, which can effectively protect the internal energy module 200, direct cooling pipe 300 and other components from the influence of the external environment, thereby improving the durability of the system. Finally, the metal material has excellent processing performance and is easy to be made into bottom shells 120 and upper covers 130 of various shapes and structures to meet the needs of energy modules of different types and specifications. The metal material of the bottom shell 120 and the upper cover 130 can be selected from aluminum, copper, steel or other metal materials with suitable physical and chemical properties. The specific metal to be selected can be selected according to the actual application environment and heat dissipation requirements.
[0033] Furthermore, direct cooling tube 300 is made of copper-based tubing. Specifically, copper, as a high-quality thermally conductive material, has excellent thermal conductivity. This allows direct cooling tube 300 to effectively and quickly transfer heat absorbed by coolant 111, further improving cooling efficiency and preventing overheating of energy module 200. Furthermore, copper-based tubing has excellent corrosion resistance, resulting in a very long service life in various harsh environments. Furthermore, copper-based tubing is relatively easy to form and process, allowing it to be customized according to the needs of the vehicle being used.
[0034] See also Figure 1 and Figure 2 The inlet and outlet of the direct cooling pipe 300 are both arranged on the front of the shell 100. The inlet and outlet include an inlet 320 and an outlet 330. The inlet 320 and the outlet 330 are arranged on the same side of the shell 100, such as the front. This design makes inspection and maintenance work more convenient.
[0035] Furthermore, the direct cooling tube 300 and the energy module 200 do not come into direct contact. Specifically, this design helps prevent physical damage caused by direct contact between the energy module 200 and the direct cooling tube 300, such as friction and wear between the two. Coolant 111 is provided between the direct cooling tube 300 and the energy module 200 as a heat transfer medium, which can improve heat transfer efficiency while preventing direct physical contact between the two. The coolant 111 should have good thermal conductivity and good affinity with the materials of the direct cooling tube 300 and the energy module 200 to ensure effective heat transfer.
[0036] More specifically, the coolant 111 is a liquid used for heat dissipation, which can absorb, collect, and then disperse the heat generated by the device. For example, the coolant 111 can be oil-based, water-based, or fluorine-based liquid cooling.
[0037] As you can understand, refrigerants, also known as refrigerants, are primarily used in refrigeration equipment such as air conditioners, refrigeration equipment, and heat pumps. In refrigeration systems, refrigerants absorb and dissipate heat, achieving cooling or heating effects by switching between evaporation and condensation. Common refrigerants include Freon, cyclohexane, and R134a.
[0038] Anything not described in detail in the present invention is well known to those skilled in the art.
[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
Claims
1. An energy pack with static immersion direct cooling for energy storage, characterized in that: include: a housing, wherein a cavity for containing a cooling liquid is provided in the housing; an energy module, the energy module being disposed in the cavity and being configured to be immersed in the coolant; A direct cooling pipe is used to pass refrigerant, the pipe portion of the direct cooling pipe is arranged in the cavity, the inlet and outlet of the direct cooling pipe are arranged outside the shell, the direct cooling pipe is arranged around the energy module, and the direct cooling pipe is used to be immersed in the coolant.
2. The energy pack for energy storage using a static immersion direct cooling method according to claim 1 is characterized in that: The shell includes a bottom shell and an upper cover. The cavity is provided in the bottom shell. The upper cover covers the cavity and is sealed with the bottom shell to form the shell.
3. The energy pack for energy storage using a static immersion direct cooling method according to claim 2, characterized in that: The bottom shell and the upper cover are both made of metal.
4. The energy pack for energy storage using a static immersion direct cooling method according to claim 1, characterized in that: The direct cooling pipe is a copper-based pipe.
5. The energy pack for energy storage using a static immersion direct cooling method according to claim 1, characterized in that: The inlet and outlet of the direct cooling pipe are both arranged on the front side of the shell.
6. The energy pack for energy storage using a static immersion direct cooling method according to claim 1, characterized in that: The direct cooling pipe is not in direct contact with the energy module.
7. The energy pack for energy storage using a static immersion direct cooling method according to claim 1, characterized in that: The coolant is oil-based, water-based or fluorine-based liquid cooling.