Pack-free immersed energy storage system

Abstract

The invention discloses a pack-free immersed energy storage system, and relates to the technical field of energy storage equipment. The device comprises a support, a cluster container and battery modules, the cluster container is of a sealed structure, the cluster container is arranged in the support and is fixedly connected through bolts, a plurality of mounting laminates are arranged in the cluster container, the battery modules are arranged in a plurality of groups and are fixed on the mounting laminates, the cluster container is filled with fluorinated liquid, and the fluorinated liquid is filled in the cluster container. A plurality of groups of battery modules are placed in the sealed cluster container, the energy ratio of energy storage unit volume is improved, the cluster container is filled with fluorinated liquid to perform immersed cooling and fire protection on batteries, the safety is improved, the fluorinated liquid is circularly cooled by using the cooling system, cold and heat in the cluster container are uniform, and the service life of the batteries is prolonged. Therefore, the normal work of the battery is effectively ensured, and the service life of the battery is greatly prolonged.

Description

Technical Field

[0001] The invention relates to a pack-free submerged energy storage system and to the technical field of energy storage equipment. Background Art

[0002] Cooling electrochemical energy storage in energy storage devices usually requires combining 13 batteries into a module, and then combining 4 modules into an integrated package with management to achieve air cooling or liquid cooling to ensure normal charging and discharging of the battery.

[0003] Air cooling solutions are usually configured with ventilation fans. The cooling effect of the battery is proportional to the distance from the wind-receiving surface, which will cause uneven heating and cooling of the battery cells. Long-term operation will cause a large temperature difference between the farthest and nearest ends, which will cause non-technical downtime, directly affecting the battery's charging and discharging efficiency, thereby affecting profitability and battery life.

[0004] At the same time, the energy storage system needs to be equipped with a fire protection system. The existing fire sprinkler system uses nozzles as points to cover a surface. The spraying effect is not comprehensive and the execution effect is general. Summary of the invention

[0005] The purpose of the present invention is to provide a pack-free immersion energy storage system in view of the defects or shortcomings in the prior art. A sealed cluster container is used to place multiple groups of battery modules, thereby improving the energy ratio of energy storage unit volume. The cluster container is filled with fluorine liquid to immerse the battery for cooling and fire protection, thereby improving safety. A cooling system is used to circulate the fluorine liquid, and the heat in the cluster container is uniform, thereby effectively ensuring the normal operation of the battery and greatly extending the battery life.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: it includes a bracket 1, a cluster container 2, and a battery module 3. The cluster container 2 is a sealed structure. The cluster container 2 is arranged in the bracket 1 and fixed by bolt connection. An inner frame is arranged in the cluster container 2, and a plurality of mounting layers are arranged on the inner frame. The battery module 3 is arranged in a plurality of groups and fixed on the mounting layers. The cluster container 2 is filled with fluorine liquid.

[0007] Furthermore, a refrigerator 4 is also disposed in the support 1 . A liquid inlet pipe 8 is disposed on the refrigerator 4 and is connected to the cluster container 2 , and extends from the top of the cluster container 2 to the inside of the cluster container 2 .

[0008] Furthermore, a high-pressure box 5 is disposed below the cluster container 2 .

[0009] Furthermore, the refrigerator 4 is also provided with a liquid return pipe 7 connected to the cluster container 2 and extending from the bottom of the cluster container 2 .

[0010] Furthermore, a control box 10 is also provided in the bracket 1 . The control box 10 is located above the refrigerator 4 . The control box 10 is electrically connected to the battery module 3 , the refrigerator 4 , and the high-voltage box 5 .

[0011] Furthermore, a wire pipe 9 is provided in the cluster container 2, and the wire pipe 9 includes two wire pipes for the positive electrode and the negative electrode and a BMS line. One end of the wire pipe 9 is connected to the high-voltage box 5 and then connected to the control box 10. The wire pipe 9 is provided with a plurality of connecting branch pipes, and the connecting branch pipes are provided with quick connectors connected to the battery module 3.

[0012] Furthermore, a top cover 11 is disposed on the top of the bracket 1 , and a base 6 is disposed on the bottom of the bracket 1 .

[0013] Furthermore, the refrigerator 4 is integrated with a cooling system, a circulation pump, and a circulation valve.

[0014] Furthermore, a first connector 41 and a second connector 42 are provided on the top of the freezer 4, and the first connector 41 and the second connector 42 are connected to the liquid return pipe 7 and the liquid inlet pipe 8 respectively.

[0015] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: by adopting a sealed cluster container to place multiple groups of battery modules, the energy ratio of energy storage unit volume is improved, the cluster container is filled with fluorine liquid to immerse the battery for cooling and fire protection, thereby improving safety, and a cooling system is used to circulate the fluorine liquid to evenly cool and heat the cluster container, thereby effectively ensuring the normal operation of the battery and greatly extending the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 A second angle view of

[0019] Figure 3 yes Figure 1 A third angle view of

[0020] Figure 4 It is a schematic diagram of the structure of the bracket 1 in the present invention;

[0021] Figure 5It is a schematic diagram of the structure of the refrigerator 4 in the present invention.

[0022] Explanation of the reference numerals: bracket 1, cluster container 2, battery module 3, refrigerator 4, high-pressure box 5, base 6, liquid return pipe 7, liquid inlet pipe 8, wire pipe 9, control box 10, top cover 11, first connector 41, second connector 42. DETAILED DESCRIPTION

[0023] See also Figure 1-Figure 5 As shown, the technical solution adopted in this specific embodiment is: it includes a bracket 1, a cluster container 2, and a battery module 3. The cluster container 2 is a sealed structure. The cluster container 2 is arranged in the bracket 1 and fixed by bolt connection, and an inner frame is arranged in the cluster container 2. A plurality of mounting layers are arranged on the inner frame. The battery module 3 is arranged in a plurality of groups and fixed on the mounting layers. The cluster container 2 is filled with fluorine liquid. In this embodiment, the traditional integrated package structure is cancelled, and a plurality of energy storage batteries are formed into a separate battery module. Each group of battery modules is fixed on the mounting layer of the cluster container. The separate battery module structure is not only convenient for transportation and installation, but also convenient for repairing or replacing the battery module, which can reduce the work intensity and improve the work efficiency of the energy storage system.

[0024] At the same time, the battery module structure effectively reduces the overall volume. Taking 280Ah / 314Ah battery cells as an example, a single battery module uses 13 strings of batteries as a group, and four groups form a single battery module. Its size is 1033*765*266 (length / width / height, mm), and the overall volume is 210205170mm 3 The battery module with the traditional Pack structure also has 52 battery strings and its size is 1182*860*292 (length / width / height, mm) and the volume is 296823840mm 3 ,It can be seen that the use of battery module structure can effectively improve the energy ratio of energy storage unit volume;

[0025] After the battery module is installed, fluorinated liquid is poured into the cluster container. It can be understood that a sealing cover is provided on the top of the cluster container. The traditional energy storage system uses an air cooling or liquid cooling system to manage the heat of the battery, but due to the limited heat exchange area, the heat exchange efficiency is not high. In the present embodiment, the battery module is completely immersed in the fluorinated liquid for heat management. The six sides of the battery module are in contact with the fluorinated liquid, which greatly increases the heat exchange area, thereby effectively improving the heat exchange efficiency and the thermal management efficiency. In addition, the traditional energy storage system has a risk of fire, and the battery module in the present embodiment is immersed in the fluorinated liquid. The fluorinated liquid is insulated and non-flammable, thereby eliminating the risk of fire. There is no need to equip a fire protection system, which greatly improves the safety of the energy storage system. Since there is no need to equip a fire protection system, the structure of the energy storage system is simpler, the volume is smaller, and the production and maintenance costs are reduced.

[0026] More specifically, a freezer 4 is also provided in the bracket 1. A liquid inlet pipe 8 is provided on the freezer 4 and is connected to the cluster container 2. The liquid inlet pipe 8 extends from the top of the cluster container 2 to the inside of the cluster container 2. The freezer 4 is integrated with a cooling system, a circulation pump, and a circulation valve. In order to better manage the heat of the energy storage system, a freezer is also provided as a cooling system in the present embodiment. The fluorinated liquid in the cluster container can be extracted for cooling and circulation, so that the fluorinated liquid remains in a flowing state and is cooled in the freezer. Therefore, the heat generated by the battery module during operation can be taken away more quickly, the heat exchange speed can be improved, and the thermal management efficiency can be improved.

[0027] More specifically, a high voltage box 5 is provided below the cluster container 2, and the high voltage box controls the power supply of the entire device.

[0028] More specifically, the freezer 4 is also provided with a liquid return pipe 7 connected to the cluster container 2 and extending from the bottom of the cluster container 2. When the freezer is started, the fluorinated liquid can be effectively extracted for circulation. The fluorinated liquid enters from the liquid return pipe and then circulates back to the cluster container from the liquid inlet pipe, thereby promoting the circulation of the fluorinated liquid in the cluster container to form a complete cooling circulation system. In one embodiment, the liquid return pipe is provided with a manual stop valve at the bottom section of the cluster container for manual control in special circumstances.

[0029] More specifically, a control box 10 is also provided in the bracket 1. The control box 10 is located above the freezer 4. The control box 10 is electrically connected to the battery module 3, the freezer 4, and the high-voltage box 5. The control box integrates power management and heat management modules to facilitate operators to monitor and operate the working status of the energy storage system.

[0030] To be more specific, a wire tube 9 is provided in the cluster container 2, and the wire tube 9 includes two wire tubes for the positive electrode and the negative electrode and a BMS line. One end of the wire tube 9 is connected to the high-voltage box 5 and then connected to the control box 10. The wire tube 9 is provided with a plurality of connecting branch tubes, and the connecting branch tubes are provided with quick connectors connected to the battery module 3. In this embodiment, a wire tube structure is provided to be electrically connected to the battery module, which facilitates the connection and installation of the wires.

[0031] More specifically, a top cover 11 is provided on the top of the bracket 1, which facilitates the placement and installation of the cluster container and can prevent dust and moisture when closed. A base 6 is provided at the bottom of the bracket 1 for installation and fixation of the bracket and also for transportation of the energy storage system.

[0032] More specifically, a first connector 41 and a second connector 42 are provided on the top of the freezer 4 , and the first connector 41 and the second connector 42 are connected to the liquid return pipe 7 and the liquid inlet pipe 8 respectively.

[0033] The working principle of the present invention is as follows: an inner frame is provided in the cluster container 2, a sealing plate is provided on the outside, and a plurality of mounting layers are provided on the inner frame, and a plurality of battery modules 3 are mounted on the mounting layers, thereby forming a sealed structure. By connecting the quick connectors on the branch pipes and realizing quick connection with the battery module 3, plug-and-play is realized, which facilitates the rapid installation and use of the energy storage system. After the battery module 3 is connected, the fluoride liquid can be poured. After the fluoride liquid is poured, the sealing cover of the cluster container 2 and the top cover 11 on the bracket 1 are covered to complete the assembly of the energy storage system. During the use of the equipment, each battery module 3 is controlled and managed by the control box 10, and the refrigerator 4 is started at the same time to extract the fluoride liquid in the cluster container 2 for circulating cooling. Since the battery module 3 is completely immersed in the fluoride liquid, the heat exchange area is larger and the overall heat is uniform, thereby effectively extending the service life of the battery module 3, and no fire will occur, thereby greatly improving the safety of the energy storage system. At the same time, due to the use of the immersion cooling method, the overall volume of the energy storage system is smaller.

[0034] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A pack-free submerged energy storage system, characterized in that: It comprises a support (1), a cluster container (2), and a battery module (3). The cluster container (2) is a sealed structure. The cluster container (2) is arranged in the support (1) and is fixed by bolt connection. An inner frame is arranged in the cluster container (2). A plurality of mounting layers are arranged on the inner frame. A plurality of battery modules (3) are arranged and fixed on the mounting layers. Fluoride liquid is poured into the cluster container (2).

2. A pack-free submerged energy storage system according to claim 1, characterized in that: A refrigerator (4) is also arranged in the support (1), and a liquid inlet pipe (8) is arranged on the refrigerator (4) and is connected to the cluster container (2) and extends from the top of the cluster container (2) to the inside of the cluster container (2).

3. A pack-free submerged energy storage system according to claim 1, characterized in that: A high-pressure box (5) is arranged below the cluster container (2).

4. A pack-free submerged energy storage system according to claim 2, characterized in that: The refrigerator (4) is also provided with a liquid return pipe (7) connected to the cluster container (2) and extending from the bottom of the cluster container (2).

5. The pack-free submerged energy storage system according to claim 1, characterized in that: A control box (10) is also provided in the bracket (1). The control box (10) is located above the refrigerator (4). The control box (10) is electrically connected to the battery module (3), the refrigerator (4), and the high-voltage box (5).

6. The pack-free submerged energy storage system according to claim 1, characterized in that: The cluster container (2) is provided with a wire tube (9), which includes two wire tubes for the positive electrode and the negative electrode and a BMS line. One end of the wire tube (9) is connected to the high-voltage box (5) and then connected to the control box (10). The wire tube (9) is provided with a plurality of connecting branches, and the connecting branches are provided with quick connectors connected to the battery module (3).

7. The pack-free submerged energy storage system according to claim 1, characterized in that: The top of the support (1) is provided with a top cover (11), and the bottom of the support (1) is provided with a base (6).

8. The pack-free submerged energy storage system according to claim 2, characterized in that: The refrigerator (4) is integrated with a cooling system, a circulation pump and a circulation valve.

9. The pack-free submerged energy storage system according to claim 1, characterized in that: The top of the refrigerator (4) is provided with a first connector (41) and a second connector (42), and the first connector (41) and the second connector (42) are respectively connected to the liquid return pipe (7) and the liquid inlet pipe (8).

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