Liquid-cooled high-capacity energy storage PACK

Abstract

The invention provides a liquid-cooled high-capacity energy storage PACK, and belongs to the technical field of liquid-cooled heat dissipation, the liquid-cooled high-capacity energy storage PACK comprises a liquid-cooled bottom plate, a battery module is mounted on the liquid-cooled bottom plate, a protective top cover is mounted on the liquid-cooled bottom plate, the battery module is located between the protective top cover and the liquid-cooled bottom plate, and an interface support and a BMU support are mounted on the front side of the protective top cover. The liquid-cooled high-capacity energy storage PACK has the beneficial effects that a flow channel of the liquid-cooled bottom plate adopts a wide design, the flow rate of cooling liquid is reasonably controlled, the heat of a battery cell is favorably taken away, the heat dissipation efficiency is improved, the heat dissipation requirement of a single high-energy-density battery cell can be met, a sealing gasket and a pressing strip are arranged when main parts are mounted, the air tightness of a battery module is ensured, and the heat dissipation efficiency of the battery cell is improved. And main parts are protected, and part damage caused by non-standard assembly is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid cooling and heat dissipation, and in particular relates to a liquid-cooled large-capacity energy storage PACK. Background Art

[0002] At present, electricity is still mainly obtained through traditional thermal power generation. Although thermal power generation has the advantages of stability, no seasonal influence, and easy grid dispatch, it will lead to the continuous consumption of non-renewable energy and produce a large amount of greenhouse gases and toxic substances. In order to cope with energy shortages and achieve sustainable development, various forms of power generation have emerged, such as wind power, photovoltaic power, nuclear power, and hydrogen energy. However, due to the lack of thorough research on new energy sources, problems such as intermittency and instability still exist. Therefore, in order to ensure the stability and reliability of new energy systems, energy storage technology has come to the center of the historical stage.

[0003] Among existing energy storage methods, energy storage power stations based on electrochemical energy storage occupy a dominant position. Their basic component unit is the battery module. The continuous development of electrochemical energy storage technology has greatly improved the energy density of battery cells, which has also increased the heat generation of battery cells, thereby putting higher requirements on the temperature control of battery modules. Traditional air-cooled heat dissipation can no longer meet actual needs. Summary of the Invention

[0004] The purpose of the present invention is to address the problem that the current air cooling cannot meet the heat dissipation requirements of high-density battery cells, and to propose a liquid-cooled large-capacity energy storage PACK that can meet the heat dissipation requirements of high-density battery cells through liquid cooling.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a liquid-cooled large-capacity energy storage PACK, including a liquid-cooled base plate, a battery module is installed on the liquid-cooled base plate, a protective top cover is installed on the liquid-cooled base plate, the battery module is located between the protective top cover and the liquid-cooled base plate, and an interface bracket and a BMU bracket are installed on the front side of the protective top cover. When in use, the battery module is protected by the protective top cover. When the battery module heats up, the coolant flowing through the liquid-cooled base plate takes away the heat emitted by the battery module, thereby ensuring the normal use of the battery module. The overall use effect is good and the practicality is strong.

[0006] Furthermore, a flange edge is provided around the bottom of the protective top cover, which is fitted with the top of the liquid-cooled base plate. A sealing rubber ring is filled between the flange edge and the liquid-cooled base plate. The flange edge and the liquid-cooled base plate are fixed by bolts, and the sealing rubber ring provides better airtightness and a higher level of protection for the battery module.

[0007] Furthermore, a pressure strip is provided on the upper surface of the flange edge of the protective top cover, which prevents mechanical damage to the protective top cover during the installation and disassembly process, and at the same time enables the clamping force of the bolt to be evenly distributed on the flange edge to improve the fixing effect.

[0008] Furthermore, the liquid-cooled base plate includes an upper plate and a lower plate. A liquid cooling pipeline is provided on the lower plate. The liquid cooling pipeline adopts a wide flow channel with a width of 50 mm. The two ends of the liquid cooling pipeline are respectively connected to the inlet and outlet liquid pipes. The wide flow channel is conducive to processing and molding, and the increase in the flow channel width effectively utilizes the base plate area. The coolant flow rate is reasonably controlled, which makes the heat exchange effect of the system better and can effectively reduce the working pressure of the cooling unit.

[0009] Furthermore, both ends of the front side of the liquid cooling base plate are provided with battery module fixing ears, and the battery module is fixed on the battery module mounting frame through the battery module fixing ears.

[0010] Furthermore, the protective top cover is manufactured by an integrated molding method. The integrated protective top cover has a high degree of integration, can ensure good airtightness, has a simple structure, and saves processing costs.

[0011] Furthermore, insulating thermally conductive adhesive is filled between the battery module and the liquid-cooled base plate. The thermally conductive adhesive can provide insulation to prevent the aluminum shell from coming into direct contact with the metal base plate after the outer protective film of the battery cell is accidentally ruptured. At the same time, it can ensure close contact between the battery module and the liquid-cooled base plate, thereby enhancing the heat exchange effect between the battery cell and the base plate.

[0012] Furthermore, a front mounting hole 1 and a lower mounting hole 1 are provided on the interface bracket. The front mounting hole 1 is fixed to the protective top cover by bolts, and the lower mounting hole 1 is fixed to the liquid cooling base plate by bolts. A flange bending edge is also provided at the bottom of the interface bracket, and a bending fixing hole 1 is provided on the flange bending edge.

[0013] Furthermore, the BMU bracket is provided with two front mounting holes and two lower mounting holes. The two front mounting holes are fixed to the protective top cover by bolts, and the two lower mounting holes are fixed to the liquid cooling base plate by bolts. A BMU mounting groove is provided on the inner side of the BMU bracket, and a flange bending edge is provided at the bottom of the BMU bracket. Two bent fixing holes are provided on the flange bending edge. A BMU cover is also fixed on the front side of the BMU bracket.

[0014] Furthermore, both the lower mounting hole 1 and the lower mounting hole 2 are elongated holes, and the position of the panel can be fine-tuned forward and backward through the elongated holes.

[0015] It can be seen from the above technical solutions that the present invention has the following advantages: 1) Liquid-cooled baseplate design: The liquid-cooled baseplate features an upper and lower plate structure, with the lower plate featuring a wide, 50mm-wide channel for liquid cooling. This wide channel not only facilitates machining and molding but also effectively utilizes the baseplate area, increasing coolant flow. This design allows for more efficient control of the coolant flow rate within the channel, significantly improving the system's heat exchange efficiency. The wide channel design also effectively reduces operating pressure on the cooling unit, extending its service life.

[0016] 2) Application of insulating thermal adhesive: Insulating thermal adhesive is filled between the battery module and the liquid-cooled base plate. The thermal adhesive not only has good thermal conductivity, but also acts as an insulator, preventing the aluminum shell from coming into direct contact with the metal base plate after the outer protective film of the battery cell is accidentally ruptured, thereby preventing safety hazards such as short circuits. At the same time, the thermal adhesive ensures close contact between the battery module and the liquid-cooled base plate, further enhancing the heat exchange effect between the battery cell and the base plate, and ensuring the stable operation of the battery module in high-temperature environments.

[0017] 3) Protective top cover design: The bottom of the protective top cover is equipped with a flange, which fits against the top of the liquid-cooled base plate and is sealed with a sealing rubber ring. This design provides the battery module with better airtightness and a higher level of protection, effectively preventing external dust, moisture, and other contaminants from entering the battery module, ensuring the safety and reliability of the battery module.

[0018] 4) Application of pressure strips: A pressure strip is provided at the upper end of the flange edge of the protective top cover. The pressure strip not only avoids mechanical damage to the protective top cover during installation and disassembly, but also evenly distributes the clamping force of the bolts on the flange edge, thereby improving the fixing effect and enhancing the stability and durability of the protective top cover.

[0019] 5) One-piece molding process: The protective top cover is made by one-piece molding method, which has a high degree of integration and a simple structure, and can ensure good airtightness. The one-piece molding process not only improves the overall strength of the protective top cover, but also saves processing costs and reduces production costs.

[0020] 6) Battery module fixing ears: Battery module fixing ears are set at both ends of the front side of the liquid cooling base plate. The battery module can be easily fixed to the battery module mounting frame through the ears. This design simplifies the installation process, improves installation efficiency, and also facilitates subsequent maintenance and disassembly.

[0021] 7) Interface Bracket and BMU Bracket Design: The interface bracket and BMU bracket are respectively provided with front mounting hole 1, lower mounting hole 1, front mounting hole 2, and lower mounting hole 2. These mounting holes are fixed to the protective top cover and liquid cooling base plate with bolts. The bottoms of the interface bracket and BMU bracket are also provided with flange bent edges with bent fixing holes to further enhance the fixing effect of the bracket. Lower mounting hole 1 and lower mounting hole 2 are both elongated holes, which facilitate fine-tuning of the panel position forward and backward, improving installation flexibility and precision.

[0022] 8) BMU cover design: A BMU cover is fixed to the front side of the BMU bracket. The BMU cover not only protects the BMU (Battery Management Unit) from external environmental damage, but also facilitates maintenance and inspection of the BMU, improving the maintainability of the system.

[0023] The liquid-cooling base plate flow channel of the present invention adopts a wide design, and the coolant flow rate is reasonably controlled, which is conducive to taking away the heat of the battery cell and improving the heat dissipation efficiency. It can meet the heat dissipation requirements of high-energy-density battery cells. The main components are equipped with sealing gaskets and pressure strips when installed, which ensure the airtightness of the battery module while protecting the main components, avoiding damage to parts caused by improper assembly. Most of them are sheet metal bending parts, and the parts processing cost is low, which has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. 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 any creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the internal top view structure of the present invention.

[0027] Figure 3 Schematic diagram of the structure of the liquid cooling base plate of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the interface bracket of the present invention.

[0029] Figure 5 It is a structural diagram of the interface panel of the present invention.

[0030] Figure 6 This is a schematic diagram of the BMU bracket structure of the present invention.

[0031] Figure 7 This is a schematic diagram of the BMU cover structure of the present invention.

[0032] Figure 8 This is a schematic diagram of the series aluminum bar structure of the present invention.

[0033] Figure 9 This is a schematic diagram of the main structure of the battery module of the present invention.

[0034] Figure 10 Schematic diagram of the top view of the battery module of the present invention.

[0035] In the figure: 1. Protective top cover; 2. Liquid cooling base plate; 201. Liquid inlet and outlet pipes; 202. Liquid cooling pipes; 203. Battery module fixing ears; 3. Interface bracket; 301. Front mounting hole one; 302. Lower mounting hole one; 303. Bending fixing hole one; 304. Main electrode plug-in; 305. Explosion-proof valve; 306. Fire nozzle; 307. Fire communication interface; 308. Signal communication interface; 309. MSD manual maintenance switch; 4. BMU bracket; 401. Front mounting hole two; 402. Lower mounting hole two; 403. Bending fixing hole two; 404. BMU mounting slot; 5. BMU cover; 6. Battery module; 601. End plate; 602. Steel belt; 603. Battery cell; 604. Output stage aluminum bar; 605. Wiring harness isolation plate; 606. Series aluminum bar; 607. Terminal block; 608. Aerogel. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0037] like Figure 1-2As shown, this embodiment proposes a liquid-cooled large-capacity energy storage PACK, including a liquid-cooled base plate 2, a battery module 6 is installed on the liquid-cooled base plate 2, a protective top cover 1 is installed on the liquid-cooled base plate 2, the battery module 6 is located between the protective top cover 1 and the liquid-cooled base plate 2, an interface bracket 3 and a BMU bracket 4 are installed on the front side of the protective top cover 1, a flange is provided around the bottom of the protective top cover 1, the flange is fitted with the top of the liquid-cooled base plate 2, a sealing rubber ring is filled between the flange and the liquid-cooled base plate 2, and the flange and the liquid-cooled base plate 2 are fixed by bolts. The sealing rubber ring provides good airtightness and a high level of protection for the battery module. A pressure strip is provided on the upper surface of the flange edge of the protective top cover 1. The pressure strip prevents mechanical damage to the protective top cover during installation and disassembly, and at the same time enables the clamping force of the bolt to be evenly distributed on the flange edge to improve the fixing effect. The protective top cover 1 is made by an integrated molding method. The integrated protective top cover 1 has a high degree of integration, can ensure good airtightness, has a simple structure, and saves processing costs. In terms of airtightness, the sealing rubber ring is filled between the flange edge of the protective top cover 1 and the liquid-cooling base plate 2 to form a tight sealing barrier. This design effectively prevents the intrusion of outside air, dust and water vapor, and ensures the stability of the internal environment of the battery module 6.In harsh environments with high humidity or high dust, the battery module can still maintain a good working condition, which greatly reduces the probability of battery performance degradation or failure caused by external environmental factors and extends the service life of the battery module. In terms of protection, the combination of sealing rubber rings and bolt fixation enables the entire battery module to achieve a high level of protection. Whether in complex outdoor weather conditions or in industrial production and other scenarios where foreign objects may fly, the battery module can be reliably protected. This provides a solid guarantee for the safe and stable operation of the battery module in various harsh environments, broadens its application range, and enables it to be widely used in new energy vehicles, distributed energy storage power stations and other fields with extremely high requirements for battery protection. At the same time, a pressure strip is provided on the upper surface of the flange edge of the protective top cover 1. This ingenious design plays an important role in the installation and disassembly process. When performing installation operations, the pressure strip can effectively disperse the local pressure generated when the bolts are tightened, avoiding mechanical damage to the protective top cover 1 due to pressure concentration. In frequent installation, disassembly and maintenance work, the protective top cover 1 It can always maintain good structural integrity, reducing the replacement cost and maintenance workload caused by damage to the protective top cover. At the same time, the edge pressure strip allows the clamping force of the bolts to be evenly distributed on the flange edge, thereby enhancing the connection stability between the protective top cover 1 and the liquid cooling base plate 2. When the battery module is subjected to vibration or impact, this uniform clamping force can ensure that the sealing structure will not fail due to local loosening, further ensuring the airtightness and protection performance of the battery module. The protective top cover 1 is made by an integrated molding method, which has significant advantages. The integrated molding greatly improves the integration level of the protective top cover 1. Compared with the traditional spliced top cover, it reduces many splicing gaps, fundamentally eliminating the airtightness problem caused by gaps. At the same time, the integrated molding process makes the structure of the protective top cover 1 simpler and more compact. During the production process, the processing and assembly steps of parts are reduced, greatly saving processing costs. Moreover, this simple and stable structural design, while ensuring good protection performance, also reduces the weight of the product, which is conducive to improving the energy density and transportation convenience of the entire energy storage system. When the battery module 6 The liquid-cooling baseplate 2 plays a key role in generating heat during the charging and discharging process. The coolant circulates within the baseplate, rapidly dissipating the significant heat dissipated by the battery modules 6. Through efficient heat conduction and convection, the battery module temperature is controlled within an appropriate range, effectively preventing overheating-related degradation, shortened battery life, and even safety hazards. This precise temperature control ensures stable and efficient operation of the battery modules 6 under various operating conditions, significantly improving the overall usability of the battery modules and enabling them to maintain excellent performance even under prolonged, high-load conditions. This fully demonstrates the powerful practicality of this liquid-cooled, large-capacity energy storage pack.

[0038] like Figure 3 As shown, the liquid-cooling base plate 2 includes an upper plate and a lower plate. A liquid cooling pipeline 202 is provided on the lower plate. The liquid cooling pipeline 202 adopts a wide flow channel with a width of 50 mm. Both ends of the liquid cooling pipeline 202 are respectively connected to the inlet and outlet liquid pipes 201. Battery module fixing ears 203 are provided at both ends of the front side of the liquid-cooling base plate 2. The battery module fixing ears 203 are used to fix the battery module on the battery module mounting frame. The wide flow channel is conducive to processing and molding, and the increase in the flow channel width effectively utilizes the base plate area and increases the circulation volume of the coolant. This design makes the flow rate control of the coolant in the flow channel more reasonable, so that the heat exchange effect of the system is better, and at the same time can effectively reduce the working pressure of the cooling unit and extend its service life.

[0039] like Figure 4-5 As shown, the interface bracket 3 is provided with a front mounting hole 301 and a lower mounting hole 302. The front mounting hole 301 is fixed to the protective top cover 1 by bolts, and the lower mounting hole 302 is fixed to the liquid cooling base plate 2 by bolts. The bottom of the interface bracket 3 is also provided with a flange bending edge, and the flange bending edge is provided with a bent fixing hole 303. The front end of the interface bracket 3 is also installed with multiple accessories such as a main electrode plug-in 304, an explosion-proof valve 305, a fire nozzle 306, a fire communication interface 307, a signal communication interface 308 and an MSD manual maintenance switch 309.

[0040] like Figure 6-7 As shown, the BMU bracket 4 is provided with a front mounting hole 2 401 and a lower mounting hole 2 402 . The front mounting hole 2 401 is fixed to the protective top cover 1 by bolts, and the lower mounting hole 2 402 is fixed to the liquid cooling base plate 2 by bolts. A BMU mounting groove 404 is provided on the inner side of the BMU bracket 4 , and a flange bending edge is provided at the bottom of the BMU bracket 4 , and a bent fixing hole 2 403 is provided on the flange bending edge. A BMU cover plate 5 is also fixed to the front side of the BMU bracket 4 .

[0041] Specifically, the lower mounting hole 1 302 and the lower mounting hole 2 402 are both configured as elongated holes, and the position of the panel can be fine-tuned forward and backward through the elongated holes.

[0042] like Figure 8-10As shown, the battery module 6 includes at least two battery cells 603, each end of which is provided with an end plate 601. All battery cells 603 are fixed by a steel belt 602. A wiring harness isolation plate 605 is provided between any two adjacent battery cells 603. Both sides of the wiring harness isolation plate 605 are filled with aerogel 608. The tops of any two adjacent battery cells 603 are connected in series through a series aluminum bar 606, and output-stage aluminum bars 604 are provided at the positive and negative electrodes. Terminal blocks 607 are fixed on the output-stage aluminum bars 604. Aerogel 608 can provide insulation and heat insulation while leaving room for subsequent thermal expansion of the battery cells. The CCS assembly consisting of a harness isolation plate 605, a series aluminum bar 606, an output-stage aluminum bar 604 and a harness is placed above the grouped battery cells. The voltage, temperature and other information of the battery cells can be collected at the battery management module BMU, which facilitates real-time monitoring of the working status of the battery cells. At the same time, the series aluminum bar 606 adopts an "arch bridge" design, which can avoid the problem of aluminum bar welding caused by the contraction and expansion of the battery cells.

[0043] The working process of the present invention is as follows: As an efficient and reliable energy storage device, the liquid-cooled large-capacity energy storage PACK involves the coordinated operation of multiple components to achieve protection, heat dissipation and stable operation of the battery module.

[0044] During the equipment installation phase, the liquid-cooling baseplate is first placed in the appropriate position. The liquid-cooling baseplate consists of an upper plate and a lower plate. The lower plate is equipped with a liquid-cooling pipeline with a 50mm wide channel. This wide channel not only facilitates processing and molding but also effectively utilizes the baseplate area. The liquid-cooling pipeline is connected to the inlet and outlet pipes at both ends, providing a path for the circulation of the coolant. Battery module fixing lugs are installed at both ends of the front side of the liquid-cooling baseplate. These lugs can be used to easily secure the entire battery module to the battery module mounting rack, ensuring a stable installation of the equipment.

[0045] Next, the battery module is installed on the liquid-cooled base plate. In order to ensure good contact and insulation between the battery module and the liquid-cooled base plate, insulating thermal conductive glue is filled between the two. On the one hand, the insulating thermal conductive glue can prevent the aluminum shell from coming into direct contact with the metal base plate after the outer protective film of the battery cell is accidentally ruptured, thereby playing an insulating role and preventing safety hazards such as short circuits; on the other hand, it can ensure that the battery module is closely fitted to the liquid-cooled base plate, enhance the heat exchange effect between the battery cell and the base plate, and ensure the stable operation of the battery module in a high-temperature environment.

[0046] Then the protective top cover is installed. A flange is provided around the bottom of the protective top cover. The flange fits in with the top of the liquid-cooled base plate. A sealing rubber ring is filled at the fitting point to provide better airtightness and a higher level of protection, preventing the entry of external dust, water vapor and other impurities that affect the normal operation of the battery module. The flange is fixed to the liquid-cooled base plate by bolts. To further optimize the fixing effect, a pressure strip is provided at the upper end of the flange of the protective top cover. The pressure strip not only avoids mechanical damage to the protective top cover during installation and disassembly, but also evenly distributes the clamping force of the bolts on the flange, thereby improving the overall fixing stability. The protective top cover is made using an integrated molding method. This process makes the protective top cover highly integrated and can better ensure airtightness. At the same time, the structure is simple, saving processing costs.

[0047] On the front side of the protective top cover, the interface bracket and the BMU bracket are installed. The interface bracket is provided with a front mounting hole 1 and a lower mounting hole 1. The front mounting hole 1 is fixed to the protective top cover by bolts, and the lower mounting hole 1 is fixed to the liquid cooling base plate by bolts. The bottom of the interface bracket is provided with a flange bending edge, and a bending fixing hole 1 is provided on the flange bending edge, which is convenient for connection with other related components. The BMU bracket is provided with a front mounting hole 2 and a lower mounting hole 2, which are also fixed to the protective top cover and the liquid cooling base plate by bolts respectively. A BMU mounting slot is provided on the inner side of the BMU bracket for installing the battery management unit (BMU). The flange bending edge and bending fixing hole 2 at the bottom are also used to connect other components. In addition, a BMU cover is fixed to the front side of the BMU bracket to protect the BMU. It is worth noting that the lower mounting hole 1 and the lower mounting hole 2 are both long holes. This design facilitates fine-tuning of the panel front and back during installation to ensure the accuracy of the installation position of each component.

[0048] When the equipment is put into operation, the battery modules generate heat during the charging and discharging process. At this time, coolant begins to circulate through the liquid cooling pipes of the liquid cooling baseplate. Due to the wide flow channel design, the coolant flow rate is rationally controlled, which can fully absorb the heat emitted by the battery modules. As the coolant flows, the heat is carried away, thus ensuring that the battery modules are always within the appropriate operating temperature range and ensuring their normal operation. At the same time, this design effectively reduces the workload of the cooling unit and improves the energy utilization efficiency of the entire system.

[0049] The protective top cover continues to protect the battery module, resisting possible external risks such as collision and foreign object intrusion, while the sealing rubber ring ensures the stability of the internal environment of the equipment and maintains a high level of protection. The battery management unit (BMU) is installed in a suitable position through the BMU bracket, monitoring various parameters of the battery module in real time, such as voltage, current, temperature, etc., and adjusting the working status of the battery module according to the monitoring data to ensure the safe and efficient operation of the battery module.

[0050] The present invention has the following beneficial effects: the liquid-cooling base plate flow channel of the present invention adopts a wide design, and the coolant flow rate is reasonably controlled, which is conducive to taking away the heat of the battery cell and improving the heat dissipation efficiency. It can meet the heat dissipation requirements of single high-energy-density battery cells. The main components are equipped with sealing gaskets and pressure strips when installed, which ensure the airtightness of the battery module while protecting the main components, avoiding damage to parts caused by improper assembly. Most of them are sheet metal bending parts, and the parts processing cost is low, which has a very broad application prospect.

[0051] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid-cooled large-capacity energy storage PACK, comprising a liquid-cooled base plate (2), characterized in that: A battery module (6) is mounted on the liquid cooling base plate (2), a protective top cover (1) is mounted on the liquid cooling base plate (2), the battery module (6) is located between the protective top cover (1) and the liquid cooling base plate (2), and an interface bracket (3) and a BMU bracket (4) are mounted on the front side of the protective top cover (1).

2. The liquid-cooled large-capacity energy storage PACK according to claim 1, characterized in that: A flange is provided around the bottom of the protective top cover (1), the flange is fitted with the top of the liquid cooling base plate (2), a sealing rubber ring is filled between the flange and the liquid cooling base plate (2), and the flange and the liquid cooling base plate (2) are fixed by bolts.

3. The liquid-cooled large-capacity energy storage PACK according to claim 2, characterized in that: A pressure strip is provided on the upper surface of the flange edge of the protective top cover (1).

4. The liquid-cooled large-capacity energy storage PACK according to claim 1, characterized in that: The liquid cooling base plate (2) comprises an upper plate and a lower plate. A liquid cooling pipeline (202) is provided on the lower plate. The liquid cooling pipeline (202) adopts a wide flow channel with a width of 50 mm. Both ends of the liquid cooling pipeline (202) are respectively connected to liquid inlet and outlet pipes (201).

5. The liquid-cooled large-capacity energy storage PACK according to claim 4, characterized in that: Battery module fixing lugs (203) are provided at both ends of the front side of the liquid cooling base plate (2).

6. The liquid-cooled large-capacity energy storage PACK according to claim 1, characterized in that: The protective top cover (1) is manufactured by an integral molding method.

7. The liquid-cooled large-capacity energy storage PACK according to claim 1, characterized in that: Insulating heat-conducting glue is filled between the battery module (6) and the liquid cooling base plate (2).

8. The liquid-cooled large-capacity energy storage PACK according to claim 1, characterized in that: The interface bracket (3) is provided with a front mounting hole (301) and a lower mounting hole (302). The front mounting hole (301) is fixed to the protective top cover (1) by bolts, and the lower mounting hole (302) is fixed to the liquid cooling base plate (2) by bolts. The bottom of the interface bracket (3) is also provided with a flange bending edge, and a bending fixing hole (303) is provided on the flange bending edge.

9. The liquid-cooled large-capacity energy storage PACK according to claim 8, characterized in that: The BMU bracket (4) is provided with a second front mounting hole (401) and a second lower mounting hole (402). The second front mounting hole (401) is fixed to the protective top cover (1) by bolts, and the second lower mounting hole (402) is fixed to the liquid cooling base plate (2) by bolts. A BMU mounting groove (404) is provided on the inner side of the BMU bracket (4). A flange bending edge is provided at the bottom of the BMU bracket (4). A second bending fixing hole (403) is provided on the flange bending edge. A BMU cover plate (5) is also fixed to the front side of the BMU bracket (4).

10. The liquid-cooled large-capacity energy storage PACK according to claim 9, characterized in that: The lower mounting hole 1 (302) and the lower mounting hole 2 (402) are both long holes.

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