Energy storage battery pack sealing liquid cooling equipment and process

Abstract

The invention discloses sealing liquid cooling equipment and process for an energy storage battery pack, and relates to the technical field of power batteries. The cooling effect problem is solved. The cooling device specifically comprises a cooling support assembly, an integrated outlet end cover and an integrated inlet end cover are arranged on the two sides of the cooling support assembly correspondingly, a circulating pump is arranged on the other side of the integrated outlet end cover, and the other side of the circulating pump and the other side of the integrated inlet end cover are connected with the same heat dissipation mechanism through circulating pipes correspondingly. The cooling support assembly, the integrated outlet end cover, the circulating pipe and the heat dissipation mechanism are all filled with cooling liquid. By adopting the sealed design and arranging the heat dissipation flow channels between the adjacent battery cells, the cooling liquid can be directly contacted with the side walls of the battery cells, on one hand, the contact area between the liquid cooling liquid and the side surfaces of the battery cells is larger and no dead angle exists, and on the other hand, the heat conductivity of the cooling liquid is higher, so that the heat dissipation effect of the battery cells is improved, and the service life of the battery cells is prolonged. And reliable work of the whole battery pack is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a sealed liquid cooling device and process for an energy storage battery pack. Background Art

[0002] The energy storage battery is composed of multiple energy storage cells. When the cells are discharged, part of the energy will be dissipated in the form of heat, causing the temperature of the entire battery pack to rise. Therefore, liquid cooling equipment is needed to cool it down to ensure the reliable operation of the energy storage battery.

[0003] After searching, the Chinese patent publication number CN118213661A discloses a liquid cooling device for energy storage batteries, including a bottom plate and a liquid cooling assembly arranged on the top of the bottom plate, the liquid cooling assembly including a liquid cooling plate and a first connecting member, the liquid cooling plates are provided in a plurality of rows and are arranged in sequence along the Y direction, and an assembly groove for the energy storage battery is formed between any two adjacent rows of liquid cooling plates, when the energy storage battery is arranged in the assembly groove, its two sides respectively abut against the corresponding liquid cooling plates, each liquid cooling plate is connected by a first connecting member, and the liquid cooling plate is arranged in an S shape and extends along the X direction; a heat dissipation cavity is hollowly provided in the liquid cooling plate, and a first guide channel is hollowly provided in the first connecting member, and the cooling medium can be input into the heat dissipation cavity through the first guide channel and exchange heat with the energy storage battery to achieve cooling and heat dissipation of the energy storage battery.

[0004] The above patent has the following deficiencies: it utilizes the contact between the liquid cooling plate and the battery cell to achieve heat dissipation. On the one hand, the liquid cooling plate is solid and its contact area with the battery cell is limited. On the other hand, the thermal conductivity of the liquid cooling plate is lower than that of the coolant, resulting in poor overall liquid cooling effect.

[0005] To this end, the present invention proposes a sealed liquid cooling device and process for an energy storage battery pack. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a sealed liquid cooling device and process for an energy storage battery pack.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A sealed liquid cooling device for an energy storage battery pack, comprising a cooling bracket assembly, An integrated outlet end cover and an integrated inlet end cover are respectively provided on both sides of the cooling support assembly, a circulating pump is provided on the other side of the integrated outlet end cover, the other side of the circulating pump and the other side of the integrated inlet end cover are respectively connected to the same heat dissipation mechanism through a circulating pipe, and the cooling support assembly, the integrated outlet end cover, the circulating pipe and the heat dissipation mechanism are all filled with coolant; The cooling bracket assembly includes a frame and end covers fixed to both sides of the frame by bolts, the inner wall of the frame is fixedly embedded with multiple rows of battery cells, a spacer is fixed between two adjacent frames in the same row, and the frame is provided with a heat dissipation channel between two adjacent rows of frames, and the contact surfaces between the frame and the end covers, between the battery cells, between the battery cells and the spacer, and between the spacer and the frame are all sealed with sealant; The integrated outlet end cover has the same structure as the integrated inlet end cover, and both include an integrated cover fixed to the side of the frame, a main channel opened on the inner wall of the integrated cover, and a plurality of branch channels opened on the inner wall of the integrated cover and corresponding to the position and number of the heat dissipation channels, and the branch channels are connected to the main channel.

[0008] Preferably: the inner wall of the branch channel is rotatably connected to the ball core via a connecting shaft, a heat conducting pipe is fixed inside the heat dissipation channel, a sensing cavity connected to the heat conducting pipe is opened on the inner wall of the integrated cover, a piston 1 is slidably connected to the inner wall of the sensing cavity, a spring 1 is buckled to the side wall of the piston 1, and the other end of the spring 1 is buckled to the inner wall of the sensing cavity.

[0009] Furthermore: a gear is fixed on the outer wall of the connecting shaft, a rack is meshed on the outer wall of the gear, and the rack is fixed to the end of the piston by bolts.

[0010] On the basis of the above scheme: the interior of the heat conducting tube is injected with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

[0011] A better solution among the above solutions is: the heat dissipation mechanism includes a storage box connected to the opposite side of the two circulation pipes and fixed to the side wall of the cooling bracket assembly, and a semiconductor refrigeration plate fixed to the inner wall of the storage box opening, the sealed space formed by the storage box and the semiconductor refrigeration plate is filled with hydraulic oil, the two circulation pipes are connected by a plurality of branch pipes, and the branch pipes pass through the interior of the storage box, the cooling surface of the semiconductor refrigeration plate faces the interior of the storage box, and the heat generating surface of the semiconductor refrigeration plate is fixed with a plurality of heat dissipation fins.

[0012] As a further solution of the present invention: a power regulating mechanism for controlling the power of the circulation pump according to the temperature of the integrated outlet end cover and the pressure of the integrated inlet end cover is arranged on the top of the cooling support assembly.

[0013] At the same time, the power regulation mechanism includes a heat-conducting induction tube, a cylinder body 2 and a lever. The heat-conducting induction tube is fixedly embedded in the inner wall of the integrated cover of the integrated outlet end cover, and the two ends of the heat-conducting induction tube are fixed and connected with the same cylinder body 1. The cylinder body 2 is fixedly embedded in the inner wall of the integrated cover of the integrated inlet end cover, and the cylinder body 2 is connected with the integrated cover. The inner walls of the cylinder body 1 and the cylinder body 2 are both slidably connected with piston 2. The top outer wall of the piston 2 is fixed with a piston rack by bolts, and the top inner wall of the piston rack is provided with a strip groove 1. The two ends of the lever are respectively movably limited to the inner wall of the strip groove 1 by a limiting rod 1. The middle part of the lever is provided with a strip groove 2. The inner wall of the strip groove 2 is movably connected with a slider through the limiting rod 2, and the slider is slidably connected to the top of the end cover.

[0014] As a preferred embodiment of the present invention: the heat conductive induction tube is filled with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

[0015] At the same time, an electrode head is fixed to the side wall of the slider, and an iron core is fixed to the top outer wall of the end cover through an insulating bracket. Coil one and coil one are respectively wound on the outer walls of both sides of the iron core. Coil one is connected to an external AC power supply, and the electrode head is in contact with the outer wall of coil two and is electrically conductive. The bottom end of coil two and the electrode head are respectively connected to the two terminal blocks of the circulating pump.

[0016] A sealed liquid cooling process for an energy storage battery pack comprises the following steps: A1: Equipment installation, assemble the equipment and battery cells, and ensure that all parts are sealed; A2: Charging and discharging work, using the battery cell for charging and discharging operations; A3: Adaptive cooling, start the circulation pump and heat dissipation mechanism, and adaptively control liquid cooling for the entire cooling process.

[0017] The beneficial effects of the present invention are: 1. The present invention adopts a sealed design and provides a heat dissipation channel between adjacent battery cells, so that the coolant can directly contact the side wall of the battery cell. On the one hand, the liquid coolant can have a larger contact area with the side of the battery cell without dead angles. On the other hand, the thermal conductivity of the coolant is also high, thereby increasing the heat dissipation effect of the battery cell and ensuring the reliable operation of the entire battery pack.

[0018] 2. The present invention controls the opening by setting a ball core, and combines the temperature sensing of the inner cavity of the heat dissipation channel by the mixed gas in the heat conduction tube, so that the higher the temperature of the inner cavity of the heat dissipation channel, the greater the flow rate of the coolant in the heat dissipation channel, and the lower the temperature of the inner cavity of the heat dissipation channel, the smaller the flow rate of the coolant, thereby realizing adaptive regulation of heat generation and heat dissipation.

[0019] 3. The present invention, by setting the mixed gas in the heat-conducting tube to be a mixture of nitrogen dioxide and nitrogen tetroxide, can utilize the thermal expansion and contraction characteristics of the gas itself on the one hand, and on the other hand, can utilize the characteristic that the chemical equilibrium shift causes the volume change, so that the mixed gas is more sensitive to temperature, thereby making the driving control of the ball core more sensitive, and increasing the reliability of use.

[0020] 4. The present invention, by configuring the heat dissipation mechanism as a storage box, a semiconductor refrigeration sheet, heat dissipation fins and a branch pipe, can divert and dissipate the coolant in the circulation pipe through a plurality of branch pipes, thereby increasing the contact area between the coolant in the branch pipe and the coolant in the storage box and increasing the heat transfer rate.

[0021] 5. The present invention sets a power regulating mechanism, which utilizes thermal expansion to sense the coolant temperature of the integrated outlet end cover on the one hand, and utilizes piston 2 to directly sense the pressure of the integrated inlet end cover on the other hand, and then uses this as a driving force to act on the lever, and combines the "transformer" principle to change the power of the circulating pump, thereby realizing the self-sensing and self-driving functions of the power of the circulating pump and the temperature of the integrated outlet end cover and the pressure of the integrated inlet end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 2 A schematic diagram of the exploded structure of a cooling bracket assembly of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 3 A schematic cross-sectional view of a cooling bracket assembly of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 4 A schematic diagram of the structure of the connection between an integrated outlet end cover or an integrated inlet end cover and a cooling bracket assembly of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 5 A schematic diagram of the heat dissipation structure of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 6 A schematic diagram of the structure of a heat-conducting induction tube and a cylinder body of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 7 A schematic diagram of the second structure of a cylinder body of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Figure 8 A schematic diagram of the power regulation mechanism structure of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention; Fig. 9 A sealed liquid cooling device for an energy storage battery pack proposed by the present invention Figure 8 The enlarged structural diagram of part A in the middle; Fig.10 A sealed liquid cooling device for an energy storage battery pack proposed by the present invention Figure 8 The enlarged structural diagram of the middle C part; Fig.11 A sealed liquid cooling device for an energy storage battery pack proposed by the present invention Figure 8 The enlarged structural diagram of part B in the middle; Fig.12 This is a schematic structural diagram of coil 1, iron core, and coil 2 of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention.

[0023] In the figure: 1. cooling bracket assembly; 2. integrated outlet end cover; 3. circulation pump; 4. circulation pipe; 5. heat dissipation mechanism; 6. integrated inlet end cover; 7. power adjustment mechanism; 8. frame; 9. end cover; 10. spacer; 11. heat dissipation channel; 12. battery core; 13. heat conduction pipe; 14. piston 1; 15. connecting shaft; 16. spring 1; 17. integrated cover; 18. induction chamber; 19. gear; 20. ball core; 21. main flow channel; 2 2. Rack; 23. Branch channel; 24. Storage box; 25. Semiconductor refrigeration plate; 26. Heat dissipation fin; 27. Branch pipe; 28. Thermal induction tube; 29. ​​Cylinder body one; 30. Cylinder body two; 31. Piston two; 32. Piston rack; 33. Lever; 34. Limit rod one; 35. Strip groove one; 36. Strip groove two; 37. Limit rod two; 38. Slider; 39. Electrode head; 40. Coil one; 41. Iron core; 42. Coil two. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Embodiment 1: A sealed liquid cooling device for energy storage battery packs, such as Figure 1-Figure 12 As shown, it includes a cooling support assembly 1, and an integrated outlet end cover 2 and an integrated inlet end cover 6 are respectively provided on both sides of the cooling support assembly 1, and a circulating pump 3 is provided on the other side of the integrated outlet end cover 2. The other side of the circulating pump 3 and the other side of the integrated inlet end cover 6 are respectively connected to the same heat dissipation mechanism 5 through a circulating pipe 4, and the cooling support assembly 1, the integrated outlet end cover 2, the circulating pipe 4, and the heat dissipation mechanism 5 are all filled with coolant.

[0027] The cooling bracket assembly 1 includes a frame 8 and end covers 9 fixed to both sides of the frame 8 by bolts, a plurality of columns of battery cells 12 are fixedly embedded in the inner wall of the frame 8, a spacer block 10 is fixed between two adjacent frames 8 in the same column, and a heat dissipation channel 11 is provided between the two adjacent columns of frames 8 of the frame 8, and the contact surfaces between the frame 8 and the end covers 9, between the battery cells 12 and the battery cells 12, between the battery cells 12 and the spacer block 10, and between the spacer block 10 and the frame 8 are all sealed with sealant.

[0028] The integrated outlet end cover 2 has the same structure as the integrated inlet end cover 6 , and both include an integrated cover 17 fixed to the side of the frame 8 , a main channel 21 opened on the inner wall of the integrated cover 17 , and a plurality of branch channels 23 opened on the inner wall of the integrated cover 17 and corresponding in position and number to the heat dissipation channel 11 , and the branch channels 23 are connected to the main channel 21 .

[0029] When the device is in use, the circulating pump 3 is started to drive the coolant to circulate, and the coolant enters the heat dissipation channel 11 through the integrated inlet end cover 6, directly contacts the side of the battery cell 12, and takes away the heat of the battery cell 12 through heat exchange, and then the coolant is discharged from the integrated outlet end cover 2, and after circulating through the circulating pump 3 again, it enters the heat dissipation mechanism 5 to cool down, and then the coolant circulates again after cooling down.

[0030] The device adopts a sealed design and provides a heat dissipation channel 11 between adjacent battery cells 12, so that the coolant can directly contact the side wall of the battery cell 12. On the one hand, the liquid coolant can have a larger contact area with the side of the battery cell 12 without dead angles. On the other hand, the thermal conductivity of the coolant is also high, thereby increasing the heat dissipation effect of the battery cell 12 and ensuring the reliable operation of the entire battery pack.

[0031] In order to solve the problem of reliable heat dissipation of high local heat generation; Figure 4 As shown, the inner wall of the branch channel 23 is rotatably connected to the ball core 20 through the connecting shaft 15, the heat pipe 13 is fixed inside the heat dissipation channel 11, and the inner wall of the integrated cover 17 is provided with a sensing cavity 18 connected to the heat pipe 13, the inner wall of the sensing cavity 18 is slidably connected to the piston 14, the side wall of the piston 14 is buckled with a spring 16, and the other end of the spring 16 is buckled to the inner wall of the sensing cavity 18.

[0032] A gear 19 is fixed to the outer wall of the connecting shaft 15, and a rack 22 is meshed on the outer wall of the gear 19. The rack 22 is fixed to the end of the piston 14 by bolts.

[0033] The interior of the heat conducting tube 13 is filled with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

[0034] When the entire battery pack is in use, the charge and discharge power of each battery cell 12 and whether it is working are controlled by the circuit board or the driving computer. This may result in different heat release of local batteries 12 or different heat generation of all batteries 12. At this time, if the cooling effect is the same, there will be insufficient local cooling or waste of local cooling resources. Based on this: When the device is in use, when the battery cells 12 on both sides of the heat dissipation channel 11 are not working, the temperature of the inner cavity of the heat dissipation channel 11 is low, and the temperature of the inner cavity of the heat conduction pipe 13 is also low. On the one hand, the nitrogen dioxide and nitrogen tetroxide shrink by themselves, and on the other hand, their chemical equilibrium moves toward the direction of generating nitrogen tetroxide, thereby reducing the gas volume in the inner cavity of the heat conduction pipe 13, reducing the pressure, and reducing the pressure acting on the piston 14. The piston 14 moves to the side close to the heat conduction pipe 13 under the elastic force of the spring 16. At this time, the ball core 20 rotates to a state where the branch channel 23 is blocked, and the heat dissipation channel 13 is closed. No coolant passes through the heat dissipation channel 11. When the inner cavity temperature of the heat dissipation channel 11 increases, the gas volume in the heat conduction pipe 13 will also increase, thereby increasing the pressure. The piston 14 will be moved away from the heat conduction pipe 13 under pressure, thereby driving the ball core 20 to rotate through the rack 22 and the gear 19, so that the heat dissipation channel 11 is connected with the main channel 21, and the coolant passes through the heat dissipation channel 11. When the temperature in the heat dissipation channel 11 is higher, the movement distance of the piston 14 is greater, thereby making the opening of the ball core 20 larger and the amount of coolant flowing through the heat dissipation channel 11 larger.

[0035] The device controls the opening by setting the ball core 20, and combines the temperature sensing of the inner cavity of the heat dissipation channel 11 by the mixed gas in the heat conduction pipe 13, so that the higher the temperature of the inner cavity of the heat dissipation channel 11, the greater the flow rate of the coolant in the heat dissipation channel 11, and the lower the temperature of the inner cavity of the heat dissipation channel 11, the smaller the flow rate of the coolant, thereby realizing adaptive regulation of heat generation and heat dissipation.

[0036] In addition, by setting the mixed gas in the heat pipe 13 to be a mixture of nitrogen dioxide and nitrogen tetroxide, the device can utilize the thermal expansion and contraction characteristics of the gas itself on the one hand, and the volume change caused by the chemical equilibrium shift on the other hand, so that the mixed gas is more sensitive to temperature, thereby making the drive control of the ball core 20 more sensitive, thereby increasing the reliability of use.

[0037] In order to solve the problem of reliable cooling; Figure 5As shown, the heat dissipation mechanism 5 includes a storage box 24 connected to the opposite side of the two circulation pipes 4 and fixed to the side wall of the cooling bracket assembly 1, and a semiconductor refrigeration sheet 25 fixed to the inner wall of the opening of the storage box 24. The sealed space formed by the storage box 24 and the semiconductor refrigeration sheet 25 is filled with hydraulic oil. The two circulation pipes 4 are connected by a plurality of branch pipes 27, and the branch pipes 27 pass through the interior of the storage box 24. The cooling surface of the semiconductor refrigeration sheet 25 faces the interior of the storage box 24, and the heat generating surface of the semiconductor refrigeration sheet 25 is fixed with a plurality of heat dissipation fins 26.

[0038] When the high-temperature coolant flows through the branch pipe 27, it transfers heat to the coolant in the storage box 24 through heat exchange. At this time, the semiconductor refrigeration chip 25 is started to cool the coolant in the storage box 24. At the same time, the heat generated on the other side of the semiconductor refrigeration chip 25 is dissipated into the air through the heat dissipation fins 26.

[0039] The device, by configuring the heat dissipation mechanism 5 as a storage box 24, a semiconductor cooling sheet 25, a heat dissipation fin 26 and a branch pipe 27, can divert and dissipate the coolant in the circulation pipe 4 through a plurality of branch pipes 27, thereby increasing the contact area between the coolant in the branch pipe 27 and the coolant in the storage box 24, and increasing the heat transfer rate.

[0040] In order to solve the adaptive control problem of heat dissipation efficiency; Figure 1 , Figure 6-Figure 12 As shown, the top of the cooling support assembly 1 is provided with a power regulating mechanism 7 for controlling the power of the circulation pump 3 according to the temperature of the integrated outlet end cover 2 and the pressure of the integrated inlet end cover 6. The power regulating mechanism 7 controls the power of the circulation pump 3 in a logic including the following steps: S1: When the coolant pressure of the integrated inlet end cover 6 increases, the opening of the integrated outlet end cover 2 and the ball core 20 in the integrated inlet end cover 6 is small, and the power of the circulating pump 3 is large relative to the required flow rate. At this time, the power regulating mechanism 7 controls the circulating pump 3 to reduce the power, thereby reducing the flow rate of the coolant and preventing the waste of electric energy caused by the power redundancy of the circulating pump 3; S2: When the temperature of the coolant in the integrated outlet end cover 2 is relatively high, it means that the heat generated by the battery cell 12 is large and a higher heat dissipation efficiency is required. At this time, the power regulating mechanism 7 controls the power of the circulation pump 3 to increase the flow rate of the coolant to ensure reliable heat dissipation.

[0041] Specifically, the power regulating mechanism 7 includes a heat-conducting induction tube 28, a cylinder body 30 and a lever 33. The heat-conducting induction tube 28 is fixedly embedded in the inner wall of the integrated cover 17 of the integrated outlet end cover 2, and the two ends of the heat-conducting induction tube 28 are fixed and connected to the same cylinder body 29. The cylinder body 30 is fixedly embedded in the inner wall of the integrated cover 17 of the integrated inlet end cover 6, and the cylinder body 30 is connected to the integrated cover 17. The inner walls of the cylinder bodies 29 and 30 are both slidably connected with pistons 31. The top outer wall of the piston 31 is fixed with a piston frame 32 by bolts. The top inner wall of the piston frame 32 is provided with a strip groove 35. The two ends of the lever 33 are respectively limited by a limiting rod 34 to the inner wall of the strip groove 35.

[0042] The heat-conductive induction tube 28 is filled with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

[0043] A second strip groove 36 is formed in the middle of the lever 33 , and a slider 38 is movably connected to the inner wall of the second strip groove 36 via a second limiting rod 37 , and the slider 38 is slidably connected to the top of the end cover 9 .

[0044] An electrode head 39 is fixed to the side wall of the slider 38, and an iron core 41 is fixed to the top outer wall of the end cover 9 through an insulating bracket. Coil 1 40 and coil 1 40 are respectively wound on the outer walls of both sides of the iron core 41. Coil 1 40 is externally connected to an AC power supply. The electrode head 39 is in contact with the outer wall of coil 2 42 and is electrically conductive. The bottom end of coil 2 42 and the electrode head 39 are respectively connected to the two terminal blocks of the circulating pump 3.

[0045] The connection points of the two piston racks 32 and the lever 33, and the connection points of the lever 33 and the slider 38 form three collinear points. When the temperature of the coolant at the integrated outlet end cover 2 increases, the temperature of the mixed gas in the thermal induction tube 28 will also increase, thereby causing the piston 2 31 in the cylinder body 29 to rise, thereby causing the lever 33 to rotate and causing the slider 38 to rise. At the same time, when the coolant pressure in the integrated inlet end cover 6 increases, the inner cavity pressure of the cylinder body 29 will also increase, which will also cause the lever 33 to rotate and cause the slider 38 to rise. When the slider 38 rises, the contact position between the electrode head 39 and the coil 2 42 changes, thereby increasing the number of turns of the coil 2 42 connected to the circuit, increasing the induced electromotive force, and increasing the input voltage of the circulating pump 3.

[0046] The device is provided with a power regulating mechanism 7, which, on the one hand, utilizes thermal expansion to sense the coolant temperature of the integrated outlet end cover 2, and on the other hand utilizes the piston 2 31 to directly sense the pressure of the integrated inlet end cover 6, and then uses this as a driving force to act on the lever 33, and combines the "transformer" principle to change the power of the circulating pump 3, thereby realizing the self-sensing and self-driving functions of the power of the circulating pump 3 and the temperature of the integrated outlet end cover 2 and the pressure of the integrated inlet end cover 6.

[0047] When the present embodiment is in use, the circulating pump 3 is started to drive the coolant to circulate, and the coolant enters the heat dissipation channel 11 through the integrated inlet end cover 6, directly contacts the side of the battery cell 12, and takes away the heat of the battery cell 12 through heat exchange, and then the coolant is discharged from the integrated outlet end cover 2, and after circulating through the circulating pump 3 again, it enters the heat dissipation mechanism 5 to cool down, and then the coolant circulates again after cooling. When the battery cells 12 on both sides of the heat dissipation channel 11 are not working, the inner cavity temperature of the heat dissipation channel 11 is low at this time, and the inner cavity temperature of the heat conducting pipe 13 is also low. On the one hand, nitrogen dioxide and nitrogen tetroxide shrink by themselves, and on the other hand, their chemical equilibrium will tend to generate nitrogen tetroxide. The piston 14 is moved in the direction of the nitrous oxide, thereby reducing the volume of the gas in the inner cavity of the heat pipe 13, reducing the pressure, and reducing the pressure acting on the piston 14. The piston 14 is moved to the side close to the heat pipe 13 by the elastic force of the spring 16. At this time, the ball core 20 rotates to the state of blocking the branch channel 23. No coolant passes through the heat dissipation channel 11. When the inner cavity temperature of the heat dissipation channel 11 increases, the volume of the gas in the heat pipe 13 will also increase, thereby increasing the pressure. The piston 14 is moved in the direction away from the heat pipe 13 by the pressure, thereby driving the ball core 20 to rotate through the rack 22 and the gear 19, so that the heat dissipation channel 11 is connected to the main channel 21, and the coolant passes through the heat dissipation channel 11. When the temperature in the heat dissipation channel 11 is higher, the moving distance of the piston 14 is greater, so that the opening of the ball core 20 is larger, and the amount of coolant flowing through the heat dissipation channel 11 is larger. When the high-temperature coolant flows through the branch pipe 27, it transfers heat to the coolant in the storage box 24 through heat exchange. At this time, the semiconductor refrigeration sheet 25 is started, which can cool the coolant in the storage box 24. At the same time, the heat generated on the other side of the semiconductor refrigeration sheet 25 is dissipated into the air through the heat dissipation fins 26. The connection points of the two piston racks 32 and the lever 33, and the connection points of the lever 33 and the slider 38 are connected. points, forming three points in a collinear line. When the temperature of the coolant at the integrated outlet end cover 2 increases, the temperature of the mixed gas in the thermal induction tube 28 will also increase, which will cause the piston 2 31 in the cylinder 1 29 to rise, thereby causing the lever 33 to rotate and the slider 38 to rise. At the same time, when the coolant pressure in the integrated inlet end cover 6 increases, the inner cavity pressure of the cylinder 1 29 will also increase, which will also cause the lever 33 to rotate and the slider 38 to rise. When the slider 38 rises, the contact position between the electrode head 39 and the coil 2 42 changes, thereby increasing the number of turns of the coil 2 42 connected to the circuit, increasing the induced electromotive force, and increasing the input voltage of the circulating pump 3.

[0048] Embodiment 2: A sealed liquid cooling process for energy storage battery packs, such as Figure 1-Figure 12 As shown, the following steps are included: A1: Equipment installation, assemble the equipment with the battery cell 12 and ensure that all parts are sealed; A2: charging and discharging operation, using the battery cell 12 to perform charging and discharging operations; A3: Adaptive cooling, start the circulation pump 3 and the heat dissipation mechanism 5, and perform adaptive control of liquid cooling on the entire cooling process.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealed liquid cooling device for an energy storage battery pack, comprising a cooling bracket assembly (1), characterized in that: An integrated outlet end cover (2) and an integrated inlet end cover (6) are respectively provided on both sides of the cooling support assembly (1); a circulation pump (3) is provided on the other side of the integrated outlet end cover (2); the other side of the circulation pump (3) and the other side of the integrated inlet end cover (6) are respectively connected to the same heat dissipation mechanism (5) via a circulation pipe (4); the cooling support assembly (1), the integrated outlet end cover (2), the circulation pipe (4) and the heat dissipation mechanism (5) are all filled with coolant; The cooling support assembly (1) comprises a frame (8) and end covers (9) fixed to both sides of the frame (8) by bolts, a plurality of rows of battery cells (12) are fixedly embedded in the inner wall of the frame (8), a spacer (10) is fixed between two adjacent frames (8) in the same row, and a heat dissipation channel (11) is provided between the frame (8) and the two adjacent rows of frames (8), and the contact surfaces between the frame (8) and the end covers (9), between the battery cells (12) and the battery cells (12), between the battery cells (12) and the spacer (10), and between the spacer (10) and the frame (8) are all sealed with sealant; The integrated outlet end cover (2) has the same structure as the integrated inlet end cover (6), and both include an integrated cover (17) fixed to the side of the frame (8), a main flow channel (21) opened on the inner wall of the integrated cover (17), and a plurality of branch flow channels (23) opened on the inner wall of the integrated cover (17) and corresponding in position and number to the heat dissipation flow channel (11), wherein the branch flow channels (23) are in communication with the main flow channel (21); The inner wall of the branch flow channel (23) is rotatably connected to the ball core (20) via a connecting shaft (15); a heat conducting pipe (13) is fixed inside the heat dissipation flow channel (11); a sensing chamber (18) connected to the heat conducting pipe (13) is formed on the inner wall of the integrated cover (17); a piston (14) is slidably connected to the inner wall of the sensing chamber (18); a spring (16) is buckled to the side wall of the piston (14); and the other end of the spring (16) is buckled to the inner wall of the sensing chamber (18); A gear (19) is fixed to the outer wall of the connecting shaft (15), a rack (22) is meshed with the outer wall of the gear (19), and the rack (22) is fixed to the end of the piston (14) by bolts; The interior of the heat conducting tube (13) is injected with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

2. The sealed liquid cooling device for energy storage battery pack according to claim 1, characterized in that: The heat dissipation mechanism (5) comprises a storage box (24) connected to opposite sides of the two circulation pipes (4) and fixed to the side wall of the cooling bracket assembly (1), and a semiconductor cooling plate (25) fixed to the inner wall of the opening of the storage box (24). Hydraulic oil is injected into the sealed space formed by the storage box (24) and the semiconductor cooling plate (25). The two circulation pipes (4) are connected through a plurality of branch pipes (27), and the branch pipes (27) pass through the interior of the storage box (24). The cooling surface of the semiconductor cooling plate (25) faces the interior of the storage box (24), and a plurality of heat dissipation fins (26) are fixed to the heat generating surface of the semiconductor cooling plate (25).

3. The sealed liquid cooling device for energy storage battery pack according to claim 1, characterized in that: The top of the cooling support assembly (1) is provided with a power regulating mechanism (7) for controlling the power of the circulation pump (3) according to the temperature of the integrated outlet end cover (2) and the pressure of the integrated inlet end cover (6).

4. The sealed liquid cooling device for energy storage battery pack according to claim 3, characterized in that: The power adjustment mechanism (7) comprises a heat-conducting induction tube (28), a second cylinder body (30) and a lever (33); the heat-conducting induction tube (28) is fixedly embedded in the inner wall of the integrated cover (17) of the integrated outlet end cover (2), and both ends of the heat-conducting induction tube (28) are fixedly connected to and communicate with the same cylinder body (29); the second cylinder body (30) is fixedly embedded in the inner wall of the integrated cover (17) of the integrated inlet end cover (6), and the second cylinder body (30) is communicated with the integrated cover (17); the inner walls of the first cylinder body (29) and the second cylinder body (30) are both slidably connected. The lever (33) is movably connected to a piston (31), the top outer wall of the piston (31) is fixed with a piston frame (32) by bolts, the top inner wall of the piston frame (32) is provided with a strip groove (35), both ends of the lever (33) are movably limited to the inner wall of the strip groove (35) by a limiting rod (34), the middle of the lever (33) is provided with a strip groove (36), the inner wall of the strip groove (36) is movably connected with a slider (38) by a limiting rod (37), and the slider (38) is slidably connected to the upper side of the end cover (9).

5. The sealed liquid cooling device for energy storage battery pack according to claim 4, characterized in that: The heat-conductive induction tube (28) is filled with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

6. The sealed liquid cooling device for energy storage battery pack according to claim 4, characterized in that: An electrode head (39) is fixed to the side wall of the slider (38), and an iron core (41) is fixed to the top outer wall of the end cover (9) via an insulating bracket. Coil one (40) and coil one (40) are respectively wound on the outer walls of both sides of the iron core (41). Coil one (40) is externally connected to an AC power source. The electrode head (39) is in contact with the outer wall of coil two (42) and is electrically conductive. The bottom end of coil two (42) and the electrode head (39) are respectively connected to two wiring terminals of the circulating pump (3).

7. A sealed liquid cooling process for an energy storage battery pack, which is a liquid cooling process for a sealed liquid cooling device for an energy storage battery pack according to any one of claims 1 to 6, characterized in that: The following steps are involved: A1: Equipment installation: assemble the equipment and the battery cell (12) and ensure that all parts are sealed; A2: charging and discharging operation, using the battery cell (12) to perform charging and discharging operations; A3: Adaptive cooling, starting the circulation pump (3) and the heat dissipation mechanism (5), and adaptively controlling liquid cooling for the entire cooling process.

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