An energy storage battery pack sealed liquid cooling device and process

Abstract

The present invention discloses a sealed liquid cooling device and process for an energy storage battery pack, which relates to the technical field of power batteries; in order to solve the cooling effect problem; specifically, it includes a cooling support assembly, an integrated outlet end cover and an integrated inlet end cover are respectively arranged on both sides of the cooling support assembly, a circulation pump is arranged on the other side of the integrated outlet end cover, and the other side of the circulation pump and the other side of the integrated inlet end cover are respectively connected to the same heat dissipation mechanism through a circulation pipe, and the cooling support assembly, the integrated outlet end cover, the circulation pipe and the heat dissipation mechanism are all filled with coolant. By adopting a sealed design and arranging heat dissipation channels between adjacent battery cells, the present invention enables the coolant to 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 corners. On the other hand, the thermal conductivity of the coolant is also relatively high, thereby increasing the heat dissipation effect of the battery cell and ensuring the reliable operation of the entire battery pack.

Description

Technical Field

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

[0002] An energy storage battery is composed of multiple energy storage battery cells. When the battery cells discharge externally, part of the energy is dissipated in the form of heat, causing the temperature of the entire battery pack to rise. Therefore, a liquid cooling device is required to cool it to ensure the reliable operation of the energy storage battery.

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

[0004] The above patent has the following deficiencies: It realizes heat dissipation by the contact between the liquid cooling plate and the battery cell. 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 liquid cooling plate has a lower thermal conductivity compared with the coolant, resulting in a poor overall liquid cooling effect.

[0005] Therefore, 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 deficiencies existing in 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 purpose, the present invention adopts the following technical solutions:

[0008] A sealed liquid cooling device for an energy storage battery pack includes a cooling bracket assembly.

[0009] Integrated outlet end caps and integrated inlet end caps are respectively arranged on both sides of the cooling bracket assembly. A circulation pump is arranged on the other side of the integrated outlet end cap. The other side of the circulation pump and the other side of the integrated inlet end cap are respectively connected to the same heat dissipation mechanism through a circulation pipe. The cooling bracket assembly, the integrated outlet end cap, the circulation pipe, and the heat dissipation mechanism are all filled with a coolant.

[0010] The cooling bracket assembly includes a frame and end caps fixed to both sides of the frame by bolts. Multiple columns of battery cells are fixedly embedded in the inner wall of the frame. A partition block is fixed between two adjacent frames in the same column, and a heat dissipation flow channel is provided between two adjacent columns of frames. The contact surfaces between the frame and the end caps, between the battery cells, between the battery cells and the partition blocks, and between the partition blocks and the frame are all sealed with sealant;

[0011] The integrated outlet end cap and the integrated inlet end cap have the same structure. They both include an integrated cover fixed to the side of the frame, a main flow channel opened on the inner wall of the integrated cover, and multiple branch flow channels opened on the inner wall of the integrated cover and corresponding to the heat dissipation flow channels in terms of position and quantity. The branch flow channels are communicated with the main flow channel.

[0012] Preferably: A ball core is rotatably connected to the inner wall of the branch flow channel through a connecting shaft. A heat conduction tube is fixed inside the heat dissipation flow channel. An induction cavity communicated with the heat conduction tube is opened on the inner wall of the integrated cover. A piston I is slidably connected to the inner wall of the induction cavity. One side wall of the piston I is buckled with a spring I, and the other end of the spring I is buckled to the inner wall of the induction cavity.

[0013] Furthermore: A gear is fixed to the outer wall of the connecting shaft, and a rack is meshed with the outer wall of the gear. The rack is fixed to the end of the piston I by bolts.

[0014] Based on the foregoing solution: A mixed gas of nitrogen dioxide and dinitrogen tetroxide is injected into the heat conduction tube.

[0015] A better solution in the foregoing solution is: The heat dissipation mechanism includes a storage box connected to the opposite sides of two circulation pipes and fixed to the side wall of the cooling bracket assembly, and a semiconductor refrigeration sheet fixed to the inner wall of the opening of the storage box. A hydraulic oil is injected into the sealed space formed by the storage box and the semiconductor refrigeration sheet. The two circulation pipes are communicated through multiple branch pipes, and the branch pipes penetrate through the inside of the storage box. The refrigerating surface of the semiconductor refrigeration sheet faces the inside of the storage box, and multiple heat dissipation fins are fixed to the heat generating surface of the semiconductor refrigeration sheet.

[0016] As a further solution of the present invention: A power adjustment mechanism for controlling the power of the circulation pump according to the temperature of the integrated outlet end cap and the pressure of the integrated inlet end cap is provided at the top of the cooling bracket assembly.

[0017] Meanwhile, the power adjustment mechanism includes a heat-conducting induction tube, a cylinder body II, 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 both ends of the heat-conducting induction tube are fixedly connected and communicated with the same cylinder body I. The cylinder body II is fixedly embedded in the inner wall of the integrated cover of the integrated inlet end cover, and the cylinder body II is communicated with the integrated cover. Piston II is slidably connected to the inner walls of both the cylinder body I and the cylinder body II. The outer wall of the top of the piston II is fixed with a piston frame by bolts. A strip-shaped groove I is provided in the inner wall of the top of the piston frame. Both ends of the lever are respectively movably limited in the inner wall of the strip-shaped groove I by a limiting rod I. A strip-shaped groove II is provided in the middle of the lever. A slider is movably connected to the inner wall of the strip-shaped groove II by a limiting rod II. The slider is slidably connected above the end cover.

[0018] As a preferred embodiment of the present invention: The heat-conducting induction tube is filled with a mixed gas of nitrogen dioxide and dinitrogen tetroxide.

[0019] Meanwhile, an electrode head is fixed to the side wall of the slider, and an iron core is fixed to the outer wall of the top of the end cover by an insulating bracket. Coil I and coil I are respectively wound around the outer walls of both sides of the iron core. Coil I is externally connected to an AC power supply. The electrode head is in contact with and electrically conducts with the outer wall of coil II. The bottom end of coil II and the electrode head are respectively connected to two terminal blocks of the circulation pump.

[0020] A sealed liquid cooling process for an energy storage battery pack includes the following steps:

[0021] A1: Equipment installation, assembling the equipment with the battery cells and ensuring seals at all locations;

[0022] A2: Charging and discharging operation, using the battery cells to perform charging and discharging operations;

[0023] A3: Adaptive cooling, starting the circulation pump and the heat dissipation mechanism to perform adaptive control of liquid cooling for the entire cooling process.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. In the present invention, through the use of a sealed design and the provision of heat dissipation channels located between adjacent battery cells, the coolant can directly contact the side walls of the battery cells. On the one hand, the liquid coolant can have a larger contact area with the side of the battery cell without dead corners. On the other hand, the thermal conductivity of the coolant is also relatively high, thereby increasing the heat dissipation effect of the battery cells and ensuring the reliable operation of the entire battery pack.

[0026] 2. In the present invention, by setting a spherical core for opening control and combining the temperature induction of the mixed gas in the heat-conducting tube for the inner cavity of the heat dissipation channel, the function 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 can be achieved, thereby realizing the adaptive adjustment of heat generation and heat dissipation.

[0027] 3. In the present invention, by setting the mixed gas in the heat conduction tube as a mixture of nitrogen dioxide and dinitrogen tetroxide, on the one hand, the characteristics of thermal expansion and contraction of the gas itself can be utilized, and on the other hand, the characteristics of volume change caused by the shift of its chemical equilibrium can also be utilized to make the mixed gas more sensitive to temperature, so that the driving control of the ball core is more sensitive, increasing the reliability of use.

[0028] 4. In the present invention, by setting the heat dissipation mechanism as a storage box, a semiconductor refrigeration sheet, heat dissipation fins and branch pipes, the coolant in the circulation pipe can be shunted and dissipated through multiple branch pipes, thereby increasing the contact area between the coolant in the branch pipes and the coolant in the storage box and increasing the heat transfer rate.

[0029] 5. In the present invention, by setting a power adjustment mechanism, on the one hand, it uses thermal expansion to sense the temperature of the coolant at the integrated outlet end cover, and on the other hand, it uses piston two to directly sense the pressure at the integrated inlet end cover, and then uses this as a driving force to act on the lever, and combines the "transformer" principle to change the power of the circulation pump, thus realizing the functions of self-sensing and self-driving of the power of the circulation pump with the temperature of the integrated outlet end cover and the pressure of the integrated inlet end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 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;

[0031] Figure 2 is a schematic diagram of the exploded structure of the cooling bracket assembly of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0032] Figure 3 is a schematic diagram of the sectional structure of the cooling bracket assembly of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0033] Figure 4 is a schematic diagram of the connection structure between the integrated outlet end cover or the integrated inlet end cover and the cooling bracket assembly of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0034] Figure 5 is a schematic diagram of the structure of the heat dissipation mechanism of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0035] Figure 6 is a schematic diagram of the structure of the heat conduction induction tube and cylinder one of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0036] Figure 7 is a schematic diagram of the structure of cylinder two of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0037] Figure 8Schematic structural diagram of the power adjustment mechanism of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention;

[0038] Figure 9 A sealed liquid cooling device for an energy storage battery pack proposed by the present invention Figure 8 Enlarged structural diagram of part A in

[0039] Figure 10 A sealed liquid cooling device for an energy storage battery pack proposed by the present invention Figure 8 Enlarged structural diagram of part C in

[0040] Figure 11 A sealed liquid cooling device for an energy storage battery pack proposed by the present invention Figure 8 Enlarged structural diagram of part B in

[0041] Figure 12 Schematic structural diagram of coil one, iron core, and coil two of a sealed liquid cooling device for an energy storage battery pack proposed by the present invention.

[0042] 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 block; 11. Heat dissipation flow channel; 12. Battery cell; 13. Heat conduction pipe; 14. Piston one; 15. Connecting shaft; 16. Spring one; 17. Integrated cover; 18. Induction cavity; 19. Gear; 20. Ball core; 21. Main flow channel; 22. Rack; 23. Branch flow channel; 24. Storage box; 25. Semiconductor refrigeration sheet; 26. Heat dissipation fin; 27. Branch pipe; 28. Heat conduction induction pipe; 29. Cylinder one; 30. Cylinder two; 31. Piston two; 32. Piston frame; 33. Lever; 34. Limit rod one; 35. First strip-shaped groove; 36. Second strip-shaped groove; 37. Limit rod two; 38. Slide block; 39. Electrode head; 40. Coil one; 41. Iron core; 42. Coil two. Detailed implementation manners

[0043] The technical solutions of the present invention will be further described in detail below in combination with the specific implementation manners.

[0044] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0045] Embodiment 1:

[0046] An energy storage battery pack sealed liquid cooling device, as Figures 1-12As shown in the figure, it includes a cooling bracket assembly 1. Integrated outlet end caps 2 and integrated inlet end caps 6 are respectively arranged on both sides of the cooling bracket assembly 1. A circulation pump 3 is arranged on the other side of the integrated outlet end cap 2. The other side of the circulation pump 3 and the other side of the integrated inlet end cap 6 are respectively connected to the same heat dissipation mechanism 5 through a circulation pipe 4. The cooling bracket assembly 1, the integrated outlet end cap 2, the circulation pipe 4, and the heat dissipation mechanism 5 are all filled with coolant.

[0047] The cooling bracket assembly 1 includes a frame 8 and end caps 9 fixed to both sides of the frame 8 by bolts. Multiple columns of battery cells 12 are fixedly embedded in the inner wall of the frame 8. Partition blocks 10 are fixed between adjacent two battery cells 12 in the same column. And a heat dissipation flow channel 11 is arranged between adjacent two columns of the frame 8. The contact surfaces between the frame 8 and the end caps 9, between the battery cells 12 and the battery cells 12, between the battery cells 12 and the partition blocks 10, and between the partition blocks 10 and the frame 8 are all sealed with sealant.

[0048] The integrated outlet end cap 2 and the integrated inlet end cap 6 have the same structure. They 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 to the heat dissipation flow channel 11 in position and quantity. The branch flow channels 23 communicate with the main flow channel 21.

[0049] When this device is in use, starting the circulation pump 3 can drive the coolant to circulate. The coolant enters the heat dissipation flow channel 11 through the integrated inlet end cap 6, directly contacts the side surface of the battery cell 12, and takes away the heat of the battery cell 12 through heat exchange. Then the coolant is discharged from the integrated outlet end cap 2, and after circulating through the circulation pump 3 again, it enters the heat dissipation mechanism 5 to be cooled and then the cooled coolant circulates again.

[0050] In this device, by adopting a sealed design and setting the heat dissipation flow channel 11 between adjacent battery cells 12, it can make the coolant 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 surface of the battery cell 12 without dead angles. On the other hand, the thermal conductivity of the coolant is also relatively high, thus increasing the heat dissipation effect of the battery cell 12 and ensuring the reliable operation of the entire battery pack.

[0051] To solve the problem of reliable heat dissipation for local high heat generation; as Figure 4 shown, a ball core 20 is rotatably connected to the inner wall of the branch flow channel 23 through a connecting shaft 15. A heat conduction tube 13 is fixed inside the heat dissipation flow channel 11. An induction cavity 18 communicating with the heat conduction tube 13 is opened on the inner wall of the integrated cover 17. A piston 14 is slidably connected to the inner wall of the induction cavity 18. One 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 induction cavity 18.

[0052] A gear 19 is fixed to the outer wall of the connecting shaft 15, and a rack 22 is meshed with the outer wall of the gear 19. The rack 22 is fixed to the end of the first piston 14 by bolts.

[0053] The inside of the heat conduction tube 13 is filled with a mixed gas of nitrogen dioxide and dinitrogen tetroxide.

[0054] Since during the use of the entire battery pack, the charging and discharging power of each battery cell 12 and whether it works are controlled by a circuit board or a vehicle computer, there will be situations where some battery cells 12 work and generate heat locally or the heat generated by all battery cells 12 is different. At this time, if the cooling effect is the same, there will be situations of insufficient local cooling or waste of local cooling resources. Based on this:

[0055] When the device is in use, when the battery cells 12 on both sides of the heat dissipation channel 11 do not work, the temperature inside the cavity of the heat dissipation channel 11 is low at this time, and the temperature inside the cavity of the heat conduction tube 13 is also low. On the one hand, nitrogen dioxide and dinitrogen tetroxide contract due to their own cold, and on the other hand, their chemical equilibrium will shift in the direction of generating dinitrogen tetroxide, so that the volume of the gas inside the cavity of the heat conduction tube 13 decreases, the pressure decreases, and the pressure acting on the first piston 14 decreases. The first piston 14 moves toward the side close to the heat conduction tube 13 under the elastic force of the first spring 16. At this time, the ball core 20 rotates to a state where it blocks the branch channel 23, and no coolant passes through the heat dissipation channel 11. When the temperature inside the cavity of the heat dissipation channel 11 rises, it will also cause the volume of the gas inside the heat conduction tube 13 to increase, so that the pressure increases. The first piston 14 will move away from the heat conduction tube 13 under the pressure, and then drive the ball core 20 to rotate through the rack 22 and the gear 19, so that the heat dissipation channel 11 is communicated with the main channel 21, and the coolant passes through the heat dissipation channel 11. Moreover, the higher the temperature inside the heat dissipation channel 11, the greater the moving distance of the first piston 14, so that the opening degree of the ball core 20 is greater, and the amount of coolant flowing through the heat dissipation channel 11 is greater.

[0056] In this device, by setting the ball core 20 to control the opening degree and combining the temperature sensing of the mixed gas inside the heat conduction tube 13 for the cavity of the heat dissipation channel 11, it can be ensured that the higher the temperature inside the 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 inside the cavity of the heat dissipation channel 11, the smaller the flow rate of the coolant, thus realizing the adaptive adjustment of heat generation and heat dissipation.

[0057] In addition, by setting the mixed gas inside the heat conduction tube 13 as a mixture of nitrogen dioxide and dinitrogen tetroxide, on the one hand, the characteristics of the gas's own thermal expansion and contraction can be utilized, and on the other hand, the characteristics of the volume change caused by the shift of its chemical equilibrium can be utilized to make the mixed gas more sensitive to temperature, so that the driving control of the ball core 20 is more sensitive, increasing the reliability of use.

[0058] To solve the problem of reliable cooling; such asFigure 5 As shown, the heat dissipation mechanism 5 includes a storage box 24 connected to the opposite sides of the two circulation pipes 4 and fixed to the side wall of the cooling support assembly 1, and a thermoelectric cooler 25 fixed to the inner wall of the opening of the storage box 24. A hydraulic oil is injected into the sealed space formed by the storage box 24 and the thermoelectric cooler 25. The two circulation pipes 4 are connected through a plurality of branch pipes 27, and the branch pipes 27 penetrate through the inside of the storage box 24. The cooling surface of the thermoelectric cooler 25 faces the inside of the storage box 24, and a plurality of heat dissipation fins 26 are fixed to the heat generation surface of the thermoelectric cooler 25.

[0059] 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 thermoelectric cooler 25 is activated, which can cool the coolant in the storage box 24. At the same time, the heat generated on the other side of the thermoelectric cooler 25 is dissipated into the air through the heat dissipation fins 26.

[0060] In this device, by setting the heat dissipation mechanism 5 as the storage box 24, the thermoelectric cooler 25, the heat dissipation fins 26 and the branch pipes 27, the coolant in the circulation pipe 4 can be shunted and dissipated through a plurality of branch pipes 27, so as to increase the contact area between the coolant in the branch pipes 27 and the coolant in the storage box 24 and increase the heat transfer rate.

[0061] To solve the problem of adaptive control of heat dissipation efficiency; as Figure 1 、 Figures 6-12 shown, a power adjustment 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 is provided at the top of the cooling support assembly 1. The power control logic of the power adjustment mechanism 7 for the circulation pump 3 includes the following steps:

[0062] S1: When the coolant pressure at the integrated inlet end cover 6 increases, at this time, the opening degree of the ball core 20 in the integrated outlet end cover 2 and the integrated inlet end cover 6 is small, and the power of the circulation pump 3 is relatively large for the required flow rate. At this time, the power adjustment mechanism 7 controls the power of the circulation pump 3 to decrease, thereby reducing the flow rate of the coolant and preventing the waste of electric energy caused by the redundant power of the circulation pump 3;

[0063] S2: When the temperature of the coolant in the integrated outlet end cover 2 is relatively high, it indicates that the heat generated by the battery cell 12 is more at this time, and a greater heat dissipation efficiency is required. At this time, the power adjustment mechanism 7 controls the power of the circulation pump 3 to increase, increasing the flow rate of the coolant to ensure reliable heat dissipation.

[0064] Specifically, the power adjustment mechanism 7 includes a heat-conducting induction tube 28, a cylinder block two 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 and communicated with the same cylinder block one 29. The cylinder block two 30 is fixedly embedded in the inner wall of the integrated cover 17 of the integrated inlet end cover 6, and the cylinder block two 30 is communicated with the integrated cover 17. Piston two 31 is slidably connected to the inner walls of both the cylinder block one 29 and the cylinder block two 30. The top outer wall of the piston two 31 is fixedly connected with a piston frame 32 through bolts. A strip-shaped groove one 35 is provided on the inner wall of the top of the piston frame 32. Both ends of the lever 33 are respectively movably limited in the inner wall of the strip-shaped groove one 35 through a limiting rod one 34.

[0065] The heat-conducting induction tube 28 is filled with a mixed gas of nitrogen dioxide and dinitrogen tetroxide.

[0066] A strip-shaped groove two 36 is provided in the middle of the lever 33. A slider 38 is movably connected to the inner wall of the strip-shaped groove two 36 through a limiting rod two 37. The slider 38 is slidably connected above the end cover 9.

[0067] An electrode head 39 is fixedly connected to the side wall of the slider 38. A iron core 41 is fixedly connected to the top outer wall of the end cover 9 through an insulating bracket. Coil one 40 is wound around the outer walls of both sides of the iron core 41. Coil one 40 is externally connected to an AC power supply. The electrode head 39 is in contact with and electrically conducts with the outer wall of the coil two 42. The bottom end of the coil two 42 and the electrode head 39 are respectively connected to the two wiring terminals of the circulation pump 3.

[0068] The connection points of the two piston frames 32 and the lever 33, and the connection point of the lever 33 and the slider 38 form a straight line. When the temperature of the coolant at the integrated outlet end cover 2 rises, the temperature of the mixed gas in the heat-conducting induction tube 28 also rises, which will cause the piston two 31 in the cylinder block one 29 to rise, thus causing the lever 33 to rotate and the slider 38 to rise. At the same time, when the pressure of the coolant in the integrated inlet end cover 6 increases, the internal cavity pressure of the cylinder block one 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 two 42 changes, so that the number of turns of the coil two 42 connected to the circuit increases, the induced electromotive force increases, and the input voltage of the circulation pump 3 increases.

[0069] In this device, by setting the power adjustment mechanism 7, on the one hand, it uses thermal expansion to sense the temperature of the coolant at the integrated outlet end cover 2, and on the other hand, it uses the piston two 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 circulation pump 3, thus realizing the functions of self-sensing and self-driving of the power of the circulation pump 3 with the temperature of the integrated outlet end cover 2 and the pressure of the integrated inlet end cover 6.

[0070] 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.

[0071] Embodiment 2:

[0072] A sealed liquid cooling process for energy storage battery packs, such as Figures 1-12 As shown, the following steps are included:

[0073] A1: Equipment installation, assembling the equipment with the battery cell 12 and ensuring the sealing at each place;

[0074] A2: Charging and discharging operation, performing charging and discharging operations using the battery cell 12;

[0075] A3: Adaptive cooling, starting the circulation pump 3 and the heat dissipation mechanism 5 to perform adaptive control of liquid cooling for the entire cooling process.

[0076] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within 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 dinitrogen tetroxide; 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).

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 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).

4. The sealed liquid cooling device for energy storage battery pack according to claim 3, characterized in that: The heat-conductive induction tube (28) is filled with a mixed gas of nitrogen dioxide and nitrogen tetroxide.

5. The sealed liquid cooling device for energy storage battery pack according to claim 3, 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).

6. 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 5, 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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