Liquid-cooled energy storage all-in-one machine

Abstract

The application relates to the technical field of energy storage devices, in particular to a liquid-cooled energy storage all-in-one machine; the machine comprises a cabinet body and a cabinet door, a liquid cooling module, a PCS bidirectional converter, a high-voltage power distribution system and a battery pack are arranged in the cabinet body, battery groups in the battery pack are arranged on heat-conducting plates, the heat-conducting plates are arranged on liquid cooling plates, a battery pack sealing cover plate is further arranged on the top, each battery pack is communicated with the liquid cooling module through a liquid cooling circulation pipeline, the liquid cooling plates are provided with a center cell liquid cooling pipeline and two side cell liquid cooling pipelines, the center cell liquid cooling pipeline is communicated with a center liquid cooling circulation pipeline of the liquid cooling circulation pipeline, and the two side cell liquid cooling pipelines are communicated with two side liquid cooling circulation pipelines of the liquid cooling circulation pipeline; the machine is provided with two independent liquid cooling circulation systems, can regionally cool the battery pack, has high and fast heat dissipation efficiency, makes the temperature uniformity of the battery pack better and more stable, and the safety performance is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage equipment technology, and specifically to a liquid-cooled integrated energy storage unit. Background Technology

[0002] Liquid cooling technology is a heat dissipation technology that uses liquid to carry away the heat of the battery, thereby improving the performance and energy efficiency of energy storage systems. Liquid cooling utilizes the high thermal conductivity and high heat capacity of liquid to replace air as the heat dissipation medium. Although the heat dissipation system accounts for a relatively small percentage of the value of an energy storage system, it plays a crucial role and is the key to ensuring the normal operation and continuous safe operation of the energy storage system. Compared with traditional air cooling, liquid cooling tanks have the advantages of low energy consumption and high heat dissipation. Therefore, liquid cooling energy storage has gradually replaced air cooling as the mainstream temperature control system for industrial and commercial energy storage systems.

[0003] Liquid-cooled energy storage systems use liquid cooling plates to cool the battery cells and protect the battery's normal operation. However, when the liquid cooling water supply is insufficient or the water pressure is too low and the liquid cooling circulation is slow, the heat in the battery pack takes longer to dissipate with the liquid cooling water. This can easily lead to a continuous accumulation of heat in the battery pack, eventually causing thermal runaway of the battery cells. In severe cases, it can even cause high-temperature fires, posing a serious safety hazard. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art and provide a liquid-cooled energy storage integrated machine. Each battery pack of the energy storage machine is equipped with two independent liquid cooling circulation systems, which can cool the battery pack in different areas. This makes it easier for the temperature in the center of the battery pack, which is not easy to dissipate, to be dissipated by the liquid cooling circulation. At the same time, the liquid cooling circulation pipeline is also equipped with a pressure valve and a booster pump, which can better cope with the situation of insufficient circulating water supply caused by sudden temperature rise of the battery pack. This makes the liquid cooling cooling effect of the liquid-cooled energy storage machine better and the energy storage effect better.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] A liquid-cooled energy storage integrated machine is characterized by comprising a cabinet and a cabinet door. The cabinet contains a liquid cooling chamber, a converter chamber, and a battery compartment, and a power distribution room is located on the top. The liquid cooling chamber houses the liquid cooling module of the energy storage machine, the converter chamber houses a PCS bidirectional converter, and the high-voltage power distribution system of the energy storage machine is installed in the power distribution room. The battery compartment houses several battery packs, each battery pack having a liquid-cooled plate as its base and a battery pack sealing cover on its top. Each battery pack is connected to the liquid cooling module via a liquid-cooled circulation pipe. The liquid cooling plate has a central cell liquid-cooled pipe and two side cell liquid-cooled pipes. The central cell liquid-cooled pipe is connected to the central liquid-cooled circulation pipe of the liquid-cooled circulation pipe, and the two side cell liquid-cooled pipes are connected to the two side liquid-cooled circulation pipes of the liquid-cooled circulation pipe.

[0007] Preferably, the battery pack housing contains a battery assembly, which is composed of several cells connected by conductive copper sheets. Each cell is separated by a cell separator, the height of which is lower than the height of the cell. The cell separator also contains capillary tubes connected to the liquid cooling pipes of a liquid cooling plate. A heat-conducting plate is installed at the bottom of the battery assembly, positioned above the liquid cooling plate. The heat-conducting plate effectively absorbs the heat generated by the battery assembly and transfers it to the liquid cooling plate below. Circulating liquid water within the pipes of the liquid cooling plate continuously circulates, carrying away the heat from the battery assembly and achieving a cooling effect. The cell separators separate each cell within the battery pack, preventing heat accumulation due to overly dense cell arrangement. Furthermore, the capillary tubes within the cell separators connect to liquid cooling water to cool the sides of each cell, resulting in a more effective liquid cooling system.

[0008] Preferably, the liquid cooling plate has a central liquid cooling inlet and a central liquid cooling outlet on the end near the cabinet door, which are connected by the central battery cell liquid cooling pipeline. The liquid cooling plate also has two side liquid cooling inlets and two side liquid cooling outlets on the end away from the cabinet door, which are connected by the two side battery cell liquid cooling pipelines. The central and side battery cell liquid cooling pipelines on the liquid cooling plate allow for zoned cooling of the battery cells in the center and on both sides of the battery pack. This facilitates the dissipation of heat concentrated in the center of the battery pack with the circulating liquid cooling water. The zoned heat dissipation design results in higher overall heat dissipation efficiency and faster cooling speed, leading to better temperature uniformity of the battery pack. Furthermore, each zone is connected to different liquid cooling circulation pipes, and the two independent liquid cooling circulation systems provide better cooling for each battery pack.

[0009] Preferably, the central cell liquid cooling pipe on the liquid cooling plate has more bends than the side cell liquid cooling pipes. Since the temperature of the cells on both sides of the battery pack is easily dissipated, while the temperature of the cells in the middle of the battery pack is not easily dissipated, increasing the number of bends in the central cell liquid cooling pipe can increase the contact area with the cell, allowing more heat to be carried away through the liquid cooling circulating water in the pipe, thus achieving a better cooling effect on the center temperature of the cell.

[0010] Preferably, the central liquid cooling circulation pipe is thicker than the two side liquid cooling circulation pipes. The central liquid cooling circulation pipe supplies water to the central cell liquid cooling pipeline of the battery pack, while the two side liquid cooling circulation pipes supply water to the two side cell liquid cooling pipelines of the battery pack. The thicker the pipe, the greater the flow rate of liquid cooling water, which can better supply a large amount of liquid cooling water. Since the temperature of the central cell does not dissipate, configuring a thicker water supply pipe to increase the flow rate of liquid cooling water can better remove the heat that is not easily dissipated through the circulation of a large flow of liquid cooling water, thereby achieving rapid cooling.

[0011] Preferably, the central liquid-cooled circulation pipeline includes a central liquid-cooled water supply pipe and a central liquid-cooled water return pipe. The central liquid-cooled water supply pipe has multiple branches that connect to the central liquid-cooled water inlet on the liquid-cooled plate, and the central liquid-cooled water return pipe also has multiple branches that connect to the central liquid-cooled water outlet on the liquid-cooled plate. The two-sided liquid-cooled circulation pipelines include two-sided liquid-cooled water supply pipes and two-sided liquid-cooled water return pipes. The two-sided liquid-cooled water supply pipes have multiple branches that connect to the two-sided liquid-cooled water inlets on the liquid-cooled plate. Multiple branches are also provided on the liquid-cooled return water pipes on both sides, which are respectively connected to the liquid-cooled water outlets on both sides; the center and the liquid-cooled circulation areas on both sides of the liquid-cooled plate of the battery pack are respectively connected to the supply water pipe and return water pipe of the corresponding water supply pipe. This realizes that after the liquid-cooled water enters the liquid-cooled plate and circulates to remove heat, it carries the heat out of the battery pack through the return water pipe, and finally, after the heat is evaporated by the heat exchanger and compressor of the liquid-cooled module, it re-enters the supply water pipe for circulation again, so as to continuously cool the battery pack. The repeated circulation keeps the battery pack at a low temperature, making the entire energy storage system more stable and reliable.

[0012] Preferably, each branch of the central liquid-cooled water supply pipe and the two side liquid-cooled water supply pipes connected to the battery pack is equipped with a flow control valve to increase the flow rate of the liquid-cooled circulating water. A booster pump is installed on the main pipelines of the central liquid-cooled water supply pipe and the two side liquid-cooled water supply pipes to provide pressurization to the two main liquid-cooled circulating water supply pipelines. When the temperature of a cell in a certain area of ​​the battery pack suddenly rises, the flow control valve on the corresponding branch will increase the supply flow rate of the liquid-cooled water. This allows a larger flow rate of liquid-cooled circulating water to remove the suddenly increased temperature, enabling the overheated cells to cool down through the increased flow rate of the liquid-cooled water circulation, making the liquid-cooled circulation system more effective and reliable. The booster pump on the main water supply pipeline can handle the hydraulic pressure difference caused by a sudden increase in flow rate on a certain branch pipeline. After pressurization by the booster pump, the pressure difference between the main pipeline and the branch pipelines is balanced, allowing the liquid-cooled circulation of other normal branch pipelines to operate normally.

[0013] Preferably, the battery pack sealing cover is also equipped with several temperature monitoring sensors for real-time monitoring of the temperature of the central cell and the cells on both sides of the battery pack. Each area of ​​the battery pack sealing cover is equipped with a corresponding temperature monitoring sensor, which can identify areas where the temperature rises. Then, the high temperature is carried away by the liquid cooling circulation pipe in the corresponding area, which can better and more effectively cool down the high temperature area.

[0014] Preferably, the liquid-cooled energy storage unit is further equipped with a liquid-cooled circulation control unit, which includes a temperature monitoring module, a central water supply pipe flow valve control module, two side water supply pipe flow valve control modules, and a booster pump control module. The temperature monitoring module receives temperature signals from the temperature monitoring sensor. The central water supply pipe flow valve control module and the two side water supply pipe flow valve control modules can send signals to control the operation of the flow control valves on the branches of the water supply pipes. The booster pump control module controls the operation of the booster pumps on the two main water supply pipes. Upon receiving an abnormal temperature signal from the temperature monitoring sensor, the temperature monitoring module on the liquid-cooled circulation control unit... The system identifies the area of ​​the battery pack experiencing abnormal temperature rise and then issues a flow increase command to the flow control valve on the corresponding branch via the central water supply pipe flow valve control module or the flow valve control modules on both sides. The rapid flow of high-flow liquid-cooled circulating water removes more heat, effectively cooling the overheated battery cells and restoring them to normal operation more quickly. When a sudden increase in flow in the branch pipe causes a pressure difference in the main water supply pipe, the booster pump control module controls the booster pump to pressurize and balance the pressure difference between the main pipe and the branch pipe, allowing the liquid-cooled water in other normally functioning battery packs to circulate normally, thus improving the reliability of the equipment.

[0015] Preferably, the battery compartment is provided with a support frame for placing the battery pack, and the battery pack is fixed on the support frame; multiple battery packs are fixedly installed on the support frame, and space is left on the support frame to connect the battery packs to two independent liquid cooling circulation systems.

[0016] In summary, the beneficial effects of this invention are as follows:

[0017] The liquid-cooled energy storage integrated machine described in this invention has a central cell liquid cooling pipeline and two side cell liquid cooling pipelines designed in the liquid cooling plate inside the battery pack. This allows for regional temperature control of the cells within the battery pack. The two sets of liquid cooling circulation management can better cool the cells within the battery pack, resulting in higher heat dissipation efficiency, better heat dissipation effect, and better temperature uniformity of the battery pack.

[0018] The liquid-cooled energy storage integrated machine of the present invention includes a central liquid-cooled circulation pipe and two side liquid-cooled circulation pipes, which are respectively connected to two different temperature control zones of the liquid-cooled plate. The two independent liquid-cooled circulation systems can better cool and dissipate heat from the cells in the battery pack, and also increase the reliability of the liquid-cooled circulation system.

[0019] The liquid-cooled energy storage unit described in this invention has a temperature monitoring sensor installed on the battery pack sealing cover to monitor the temperature of each area of ​​the battery pack in real time. In addition, a flow control valve and a booster pump are installed on the liquid cooling water supply pipe. This not only better copes with the battery pack running out of control due to high temperature, but also does not affect the normal operation of other battery packs. This makes the entire liquid cooling circulation system better able to cope with the situation of temperature runout of a single or multiple battery packs, increasing the practicality of the energy storage unit. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the battery pack structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the liquid cooling plate piping structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the liquid cooling circulation pipeline structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the battery pack sealing cover structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the liquid cooling control unit structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the working principle of the liquid cooling control unit of the present invention.

[0027] Diagram markings: 1-Cabinet, 101-Liquid Cooling Chamber, 102-Converter Chamber, 103-Battery Compartment, 104-Power Distribution Chamber, 2-Cabinet Door, 3-Liquid Cooling Module, 4-PCS Bidirectional Converter, 5-Battery Pack, 51-Liquid Cooling Plate, 511-Central Cell Liquid Cooling Pipeline, 512-Both Side Cell Liquid Cooling Pipelines, 513-Central Liquid Cooling Inlet, 514-Central Liquid Cooling Outlet, 515-Both Side Liquid Cooling Inlets, 516-Both Side Liquid Cooling Outlets, 52-Battery Pack Sealing Cover, 521-Temperature Monitoring Sensor, 53-Battery Group, 531-Cell, 5 32-Cell separator, 54-Heat conduction plate, 6-High voltage power distribution system, 7-Liquid cooling circulation pipe, 71-Central liquid cooling circulation pipe, 711-Central liquid cooling water supply pipe, 712-Central liquid cooling water return pipe, 72-Both sides liquid cooling circulation pipe, 721-Both sides liquid cooling water supply pipe, 722-Both sides liquid cooling water return pipe, 73-Flow control valve, 74-Booster pump, 8-Liquid cooling circulation control unit, 81-Temperature monitoring module, 82-Central water supply pipe flow valve control module, 83-Both sides water supply pipe flow valve control module, 84-Booster pump control module, 9-Support frame. Detailed Implementation

[0028] The following specific embodiments are merely illustrative of the present invention and are not intended to limit the invention. Those skilled in the art can make modifications to these embodiments without contributing any inventive step after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example

[0031] according to Figures 1 to 7 As shown, a liquid-cooled energy storage integrated unit is characterized by comprising a cabinet 1 and a cabinet door 2. The cabinet 1 contains a liquid-cooling chamber 101, a converter chamber 102, and a battery compartment 103, with a power distribution room 104 located on the top. The liquid-cooling chamber 101 houses the liquid-cooling module 3 of the energy storage unit. The converter chamber 102 houses a PCS bidirectional converter 4. The high-voltage power distribution system 6 of the energy storage unit is installed in the power distribution room 104. The battery compartment 103 houses several battery packs 5. The bottom plate of the battery pack 5 is a liquid cooling plate 51, and the top is also equipped with a battery pack sealing cover 52. Each battery pack 5 is connected to the liquid cooling module 3 through a liquid cooling circulation pipe 7. The liquid cooling plate 51 is provided with a central cell liquid cooling pipe 511 and two side cell liquid cooling pipes 512. The central cell liquid cooling pipe 511 is connected to the central liquid cooling circulation pipe 71 of the liquid cooling circulation pipe 7, and the two side cell liquid cooling pipes 512 are connected to the two side liquid cooling circulation pipes 72 of the liquid cooling circulation pipe 7.

[0032] according to Figure 2As shown, the battery pack 5 contains a battery assembly 53, which is composed of several battery cells 531 connected by conductive copper sheets. Each battery cell 531 is separated by a cell separator 532, the height of which is lower than that of the battery cell 531. The cell separator 532 also contains capillary tubes connected to the liquid cooling pipes of the liquid cooling plate 51. A heat-conducting plate 54 is mounted at the bottom of the battery assembly 53, positioned above the liquid cooling plate 51. The heat-conducting plate 54 effectively dissipates the heat from the battery pack 53. The heat absorbed by the battery pack 53 is transferred to the liquid cooling plate 51 below the heat conduction plate 54. The liquid cooling circulating water flowing in the pipes inside the liquid cooling plate 51 continuously carries away the heat of the battery pack 53, thus achieving the cooling effect of the battery. The cell separator 532 can separate each cell 531 in the battery pack 53, avoiding the accumulation of heat due to the dense arrangement of the cells 531. At the same time, the capillary tubes set in the cell separator 532 can also be connected to liquid cooling water to cool the sides of each cell 531, making the cooling effect of the liquid cooling system better.

[0033] according to Figure 3 As shown, the liquid cooling plate 51 has a central liquid cooling inlet 513 and a central liquid cooling outlet 514 on one end near the cabinet door 2, and the central liquid cooling inlet 513 and the central liquid cooling outlet 514 are connected by a central battery cell liquid cooling pipe 511; the liquid cooling plate 51 also has two side liquid cooling inlets 515 and two side liquid cooling outlets 516 on the other end away from the cabinet door 2, and the two side liquid cooling inlets 515 and the two side liquid cooling outlets 516 are connected by two side battery cell liquid cooling pipes 512; the liquid cooling plate 51 is equipped with It has a central cell liquid cooling pipe 511 and two side cell liquid cooling pipes 512, which can cool the cells 531 in the center and on both sides of the battery pack 5 in different areas. This allows the heat concentrated in the center of the battery pack 5 to be dissipated more easily with the liquid cooling circulating water. The regional heat dissipation design can make the overall heat dissipation efficiency higher and the heat dissipation speed faster, resulting in better temperature uniformity of the battery pack. In addition, each area is connected to a different liquid cooling circulation pipe, and the two independent liquid cooling circulation systems can better cool each battery pack 5.

[0034] according to Figure 3 As shown, the central cell liquid cooling pipe 511 on the liquid cooling plate 51 has more bends than the side cell liquid cooling pipes 512. Since the temperature of the cells 531 on both sides of the battery pack 5 is easily dissipated, while the temperature of the cells 531 in the middle of the battery pack 5 is not easily dissipated, the increased number of bends in the central cell liquid cooling pipe 511 can increase the contact area with the cells 531, and can carry more heat away through the liquid cooling circulating water in the pipe, which can have a better cooling effect on the center temperature of the cells 531.

[0035] according to Figure 4As shown, the central liquid cooling circulation pipe 71 of the liquid cooling circulation pipe 7 is thicker than the two side liquid cooling circulation pipes 72. The central liquid cooling circulation pipe 71 is used to supply water to the central cell liquid cooling pipe 511 of the battery pack 5, and the two side liquid cooling circulation pipes 72 are used to supply water to the two side cell liquid cooling pipes 512 of the battery pack 5. The thicker the pipe, the greater the flow rate of liquid cooling water, which can better supply a large amount of liquid cooling water. Since the temperature of the central cell 531 does not dissipate, a thicker water supply pipe is configured to increase the flow rate of the supplied liquid cooling water, which can better remove the heat of the high temperature that is not easily dissipated through the circulation of a large flow of liquid cooling water to achieve rapid cooling.

[0036] according to Figure 4 As shown, the central liquid-cooled circulation pipe 71 includes a central liquid-cooled water supply pipe 711 and a central liquid-cooled water return pipe 712. The central liquid-cooled water supply pipe 711 has multiple branches that connect to the central liquid-cooled water inlet 513 on the liquid-cooled plate 51, and the central liquid-cooled water return pipe 712 also has multiple branches that connect to the central liquid-cooled water outlet 514 on the liquid-cooled plate 51. The two-sided liquid-cooled circulation pipes 72 include two-sided liquid-cooled water supply pipes 721 and two-sided liquid-cooled water return pipes 722. The two-sided liquid-cooled water supply pipes 721 have multiple branches that connect to the two-sided liquid-cooled water inlets 515 on the liquid-cooled plate 51. Multiple branches are also provided on the liquid-cooled return water pipes 722 on both sides, which are connected to the liquid-cooled outlets 516 on both sides respectively. The liquid-cooled circulation areas in the center and on both sides of the liquid-cooled plate 51 of the battery pack 5 are respectively connected to the supply water pipe and return water pipe of the corresponding water supply pipe. This realizes that after the liquid-cooled water enters the liquid-cooled plate 51 and circulates to remove heat, it carries the heat out of the battery pack 5 through the return water pipe. Finally, the heat is evaporated through the heat exchanger and compressor of the liquid-cooled module 3 and then re-enters the supply water pipe for circulation again, so as to continuously cool the battery pack 5. The repeated circulation keeps the battery pack 5 at a low temperature, making the entire energy storage system more stable and reliable.

[0037] according to Figure 4 As shown, each branch connecting the central liquid-cooled water supply pipe 711 and the two side liquid-cooled water supply pipes 721 to the battery pack 5 is equipped with a flow control valve 73 to increase the flow rate of the liquid-cooled circulating water. A booster pump 74 is installed on the main pipelines of the central liquid-cooled water supply pipe 711 and the two side liquid-cooled water supply pipes 721 to provide pressurization to the two main liquid-cooled circulating water supply pipelines. When the temperature of a cell 531 in a certain area of ​​the battery pack 5 suddenly rises, the flow control valve 73 on the corresponding branch will increase the supply flow rate of the liquid-cooled water. This allows a larger flow rate of liquid-cooled circulating water to carry away the suddenly increased temperature, enabling the overheated cell 531 to cool down through the larger flow rate of the liquid-cooled water circulation, making the liquid-cooled circulating system more effective and reliable. The booster pump 74 on the main water supply pipeline can handle the hydraulic pressure difference caused by a sudden increase in flow rate on a certain branch pipeline. After pressurization by the booster pump 74, the pressure difference between the main pipeline and the branch pipelines is balanced, allowing the liquid-cooled circulation of other normal branch pipelines to operate normally.

[0038] according to Figure 5 As shown, the battery pack sealing cover 52 is also equipped with several temperature monitoring sensors 521, which are used to monitor the temperature of the central cell and the cells on both sides of the battery pack 5 in real time. Each area of ​​the battery pack sealing cover 52 is equipped with a corresponding temperature monitoring sensor 521, which can identify the area where the temperature rises, and then carry away the high temperature through the liquid cooling circulation pipe of the corresponding area, which can better and more effectively cool down the high temperature area.

[0039] according to Figure 6 , Figure 7 As shown, the liquid cooling module 3 is also equipped with a liquid cooling circulation control unit 8, which includes a temperature monitoring module 81, a central water supply pipe flow valve control module 82, two side water supply pipe flow valve control modules 83, and a booster pump control module 84. The temperature monitoring module 81 is used to receive the temperature signal transmitted by the temperature monitoring sensor 521. The central water supply pipe flow valve control module 82 and the two side water supply pipe flow valve control modules 83 can send signals to control the operation of the flow control valves 73 on the branches of the water supply pipe. The booster pump control module 84 is used to control the operation of the booster pumps 74 on the two main water supply pipes. After receiving an abnormal temperature signal transmitted by the temperature monitoring sensor 521, the temperature monitoring module 81 on the liquid cooling circulation control unit 8 will determine the abnormal temperature. The system controls the flow rate of the battery pack 5, which is constantly heated. Then, the flow control module 82 of the central water supply pipe or the flow control modules 83 of the two side water supply pipes sends a flow increase command to the flow control valve 73 on the corresponding branch. The rapid flow of the large flow of liquid-cooled circulating water removes more heat, thereby cooling down the overheated battery cell 531. This allows the battery cell 531 to cool down more quickly and return to normal operation. When the main water supply pipe experiences a pressure difference due to a sudden increase in flow rate in the branch pipe, the booster pump control module 84 controls the booster pump 74 to increase the pressure and balance the pressure difference between the main pipe and the branch pipe. This allows the liquid-cooled water in other normally functioning battery packs 5 to circulate normally, improving the reliability of the equipment.

[0040] according to Figure 1 As shown, a support frame 9 for placing battery packs 5 is provided inside the battery compartment 103, and the battery packs 5 are fixed on the support frame 9; multiple battery packs 5 are fixedly installed on the support frame 9, and space is left on the support frame 9 to connect the battery packs 5 to two independent liquid cooling circulation systems.

Claims

1. A liquid-cooled energy storage integrated machine, characterized in that, The device includes a cabinet (1) and a cabinet door (2). The cabinet (1) contains a liquid cooling chamber (101), a converter chamber (102), and a battery compartment (103). A power distribution room (104) is also provided on the top. The liquid cooling chamber (101) contains a liquid cooling module (3) for the energy storage machine. The converter chamber (102) contains a PCS bidirectional converter (4). The high-voltage power distribution system (6) of the energy storage machine is installed in the power distribution room (104). The battery compartment (103) contains several battery packs (5). The bottom plate of the battery packs (5) is liquid-cooled. The plate (51) is also equipped with a battery pack sealing cover (52) on the top. Each battery pack (5) is connected to the liquid cooling module (3) through a liquid cooling circulation pipe (7). The liquid cooling plate (51) is provided with a central cell liquid cooling pipe (511) and two side cell liquid cooling pipes (512). The central cell liquid cooling pipe (511) is connected to the central liquid cooling circulation pipe (71) of the liquid cooling circulation pipe (7), and the two side cell liquid cooling pipes (512) are connected to the two side liquid cooling circulation pipes (72) of the liquid cooling circulation pipe (7). The battery pack (5) has a battery group (53) inside its housing. The battery group (53) is composed of several cells (531) connected by conductive copper sheets. Each cell (531) is separated by a cell separator (532). The height of the cell separator (532) is lower than the height of the cell (531). The cell separator (532) is also provided with a capillary tube that is connected to the liquid cooling pipe of the liquid cooling plate (51). A heat-conducting plate (54) is also installed at the bottom of the battery group (53). The heat-conducting plate (54) is placed on the liquid cooling plate (51). The liquid cooling plate (51) is provided with a central liquid cooling inlet (513) and a central liquid cooling outlet (514) at one end near the cabinet door (2), and the central liquid cooling inlet (513) and the central liquid cooling outlet (514) are connected by the central battery cell liquid cooling pipeline (511); the liquid cooling plate (51) is also provided with two side liquid cooling inlets (515) and two side liquid cooling outlets (516) at one end away from the cabinet door (2), and the two side liquid cooling inlets (515) and the two side liquid cooling outlets (516) are connected by the two side battery cell liquid cooling pipelines (512); The central liquid-cooled circulation pipe (71) includes a central liquid-cooled water supply pipe (711) and a central liquid-cooled water return pipe (712). The central liquid-cooled water supply pipe (711) has multiple branches that are connected to the central liquid-cooled water inlet (513) on the liquid-cooled plate (51). The central liquid-cooled water return pipe (712) also has multiple branches that are connected to the central liquid-cooled water outlet (514) on the liquid-cooled plate (51). The two-sided liquid-cooled circulation pipes (72) include two-sided liquid-cooled water supply pipes (721) and two-sided liquid-cooled water return pipes (722). The two-sided liquid-cooled water supply pipes (721) have multiple branches that are connected to the two-sided liquid-cooled water inlets (515) on the liquid-cooled plate (51). The two-sided liquid-cooled water return pipes (722) also have multiple branches that are connected to the two-sided liquid-cooled water outlets (516). A flow control valve (73) is installed on each branch of the central liquid-cooled water supply pipe (711) and the two side liquid-cooled water supply pipes (721) that connects to the battery pack (5) to increase the flow rate of the liquid-cooled circulating water. A booster pump (74) is installed on the main pipeline of the central liquid-cooled water supply pipe (711) and the two side liquid-cooled water supply pipes (721) to provide pressure to the two main liquid-cooled circulating water supply pipelines. The battery pack sealing cover (52) is also provided with several temperature monitoring sensors (521) for real-time monitoring of the temperature of the central cell and the cells on both sides of the battery pack (5); The liquid cooling module (3) is also equipped with a liquid cooling circulation control unit (8), which includes a temperature monitoring module (81), a central water supply pipe flow valve control module (82), two side water supply pipe flow valve control modules (83), and a booster pump control module (84). The temperature monitoring module (81) is used to receive the temperature signal transmitted by the temperature monitoring sensor (521). The central water supply pipe flow valve control module (82) and the two side water supply pipe flow valve control modules (83) can send signals to control the operation of the flow control valve (73) on the water supply pipe branch. The booster pump control module (84) is used to control the operation of the booster pump (74) on the two main water supply pipes. When the temperature of a cell (531) in a certain battery pack (5) suddenly rises, the flow control valve (73) on the corresponding branch will increase the supply flow of liquid cooling water to remove the suddenly increased temperature through a larger flow of liquid cooling circulating water. When the main pipe in the water supply pipe is affected by the sudden increase in flow in the branch pipe, the booster pump control module (84) will control the booster pump (74) to increase the pressure and balance the pressure difference in the main pipe and the branch pipe, so that the liquid cooling water in other normally functioning battery packs (5) can circulate normally. The central cell liquid cooling pipeline (511) on the liquid cooling plate (51) has more bends than the two side cell liquid cooling pipelines (512). The central liquid cooling circulation pipe (71) of the liquid cooling circulation pipe (7) is thicker than the two side liquid cooling circulation pipes (72).

2. The liquid-cooled energy storage integrated machine according to claim 1, characterized in that, The battery compartment (103) is provided with a support frame (9) for placing the battery pack (5), and the battery pack (5) is fixed on the support frame (9).

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